ff2f1f691c
Commit f4179ad46f added support for operation bitmaps for
NFSv4.1/4.2. This commit uses those to implement the SP4_MACH_CRED
case for the NFSv4.1/4.2 ExchangeID operation since the Linux
NFSv4.1/4.2 client is now using this for Kerberized mounts.
The Linux Kerberized NFSv4.1/4.2 mounts currently work without
support for this because Linux will fall back to SP4_NONE,
but there is no guarantee this fallback will work forever.
This commit only affects Kerberized NFSv4.1/4.2 mounts from
Linux at this time.
MFC after: 3 months
8948 lines
252 KiB
C
8948 lines
252 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009 Rick Macklem, University of Guelph
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/extattr.h>
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#include <fs/nfs/nfsport.h>
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int nfsrv_issuedelegs = 0;
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int nfsrv_dolocallocks = 0;
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struct nfsv4lock nfsv4rootfs_lock;
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time_t nfsdev_time = 0;
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int nfsrv_layouthashsize;
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volatile int nfsrv_layoutcnt = 0;
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NFSD_VNET_DEFINE(struct nfsrv_stablefirst, nfsrv_stablefirst);
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NFSD_VNET_DECLARE(int, nfsrv_numnfsd);
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NFSD_VNET_DECLARE(struct nfsstatsv1 *, nfsstatsv1_p);
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extern uint32_t nfs_srvmaxio;
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extern int nfsrv_lease;
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extern struct timeval nfsboottime;
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extern u_int32_t newnfs_true, newnfs_false;
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extern struct mtx nfsrv_dslock_mtx;
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extern struct mtx nfsrv_recalllock_mtx;
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extern struct mtx nfsrv_dontlistlock_mtx;
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extern int nfsd_debuglevel;
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extern u_int nfsrv_dsdirsize;
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extern struct nfsdevicehead nfsrv_devidhead;
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extern int nfsrv_doflexfile;
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extern int nfsrv_maxpnfsmirror;
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NFSV4ROOTLOCKMUTEX;
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NFSSTATESPINLOCK;
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extern struct nfsdontlisthead nfsrv_dontlisthead;
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extern volatile int nfsrv_devidcnt;
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extern struct nfslayouthead nfsrv_recalllisthead;
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extern char *nfsrv_zeropnfsdat;
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SYSCTL_DECL(_vfs_nfsd);
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int nfsrv_statehashsize = NFSSTATEHASHSIZE;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN,
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&nfsrv_statehashsize, 0,
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"Size of state hash table set via loader.conf");
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int nfsrv_clienthashsize = NFSCLIENTHASHSIZE;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN,
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&nfsrv_clienthashsize, 0,
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"Size of client hash table set via loader.conf");
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int nfsrv_lockhashsize = NFSLOCKHASHSIZE;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN,
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&nfsrv_lockhashsize, 0,
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"Size of file handle hash table set via loader.conf");
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int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN,
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&nfsrv_sessionhashsize, 0,
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"Size of session hash table set via loader.conf");
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int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN,
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&nfsrv_layouthighwater, 0,
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"High water mark for number of layouts set via loader.conf");
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static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN,
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&nfsrv_v4statelimit, 0,
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"High water limit for NFSv4 opens+locks+delegations");
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static int nfsrv_writedelegifpos = 0;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW,
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&nfsrv_writedelegifpos, 0,
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"Issue a write delegation for read opens if possible");
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static int nfsrv_allowreadforwriteopen = 1;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW,
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&nfsrv_allowreadforwriteopen, 0,
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"Allow Reads to be done with Write Access StateIDs");
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int nfsrv_pnfsatime = 0;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW,
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&nfsrv_pnfsatime, 0,
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"For pNFS service, do Getattr ops to keep atime up-to-date");
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int nfsrv_flexlinuxhack = 0;
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW,
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&nfsrv_flexlinuxhack, 0,
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"For Linux clients, hack around Flex File Layout bug");
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/*
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* Hash lists for nfs V4.
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*/
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NFSD_VNET_DEFINE(struct nfsclienthashhead *, nfsclienthash);
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NFSD_VNET_DEFINE(struct nfslockhashhead *, nfslockhash);
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NFSD_VNET_DEFINE(struct nfssessionhash *, nfssessionhash);
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struct nfslayouthash *nfslayouthash;
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volatile int nfsrv_dontlistlen = 0;
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static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0;
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static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0;
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static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER;
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static int nfsrv_nogsscallback = 0;
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static volatile int nfsrv_writedelegcnt = 0;
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static int nfsrv_faildscnt;
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NFSD_VNET_DEFINE_STATIC(time_t, nfsrvboottime);
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/* local functions */
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static void nfsrv_dumpaclient(struct nfsclient *clp,
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struct nfsd_dumpclients *dumpp);
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static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep,
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NFSPROC_T *p);
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static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep,
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NFSPROC_T *p);
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static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
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NFSPROC_T *p);
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static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp,
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int cansleep, NFSPROC_T *p);
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static void nfsrv_freenfslock(struct nfslock *lop);
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static void nfsrv_freenfslockfile(struct nfslockfile *lfp);
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static void nfsrv_freedeleg(struct nfsstate *);
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static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp,
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u_int32_t flags, struct nfsstate **stpp);
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static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
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struct nfsstate **stpp);
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static int nfsrv_getlockfh(vnode_t vp, u_short flags,
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struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p);
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static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
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struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit);
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static void nfsrv_insertlock(struct nfslock *new_lop,
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struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp);
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static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
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struct nfslock **other_lopp, struct nfslockfile *lfp);
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static int nfsrv_getipnumber(u_char *cp);
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static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
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nfsv4stateid_t *stateidp, int specialid);
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static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
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u_int32_t flags);
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static int nfsrv_docallback(struct nfsclient *clp, int procnum,
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nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp,
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struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p);
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static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
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uint32_t callback, int op, const char *optag, struct nfsdsession **sepp,
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int *slotposp);
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static u_int32_t nfsrv_nextclientindex(void);
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static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp);
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static void nfsrv_markstable(struct nfsclient *clp);
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static void nfsrv_markreclaim(struct nfsclient *clp);
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static int nfsrv_checkstable(struct nfsclient *clp);
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static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct
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vnode *vp, NFSPROC_T *p);
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static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp,
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NFSPROC_T *p, vnode_t vp);
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static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
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struct nfsclient *clp, int *haslockp, NFSPROC_T *p);
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static int nfsrv_notsamecredname(int op, struct nfsrv_descript *nd,
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struct nfsclient *clp);
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static time_t nfsrv_leaseexpiry(void);
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static void nfsrv_delaydelegtimeout(struct nfsstate *stp);
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static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
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struct nfsstate *stp, struct nfsrvcache *op);
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static int nfsrv_nootherstate(struct nfsstate *stp);
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static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
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uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p);
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static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp,
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uint64_t init_first, uint64_t init_end, NFSPROC_T *p);
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static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags,
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int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp,
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NFSPROC_T *p);
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static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp,
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NFSPROC_T *p);
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static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags,
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uint64_t first, uint64_t end);
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static void nfsrv_locklf(struct nfslockfile *lfp);
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static void nfsrv_unlocklf(struct nfslockfile *lfp);
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static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid);
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static int nfsrv_freesession(struct nfsrv_descript *nd, struct nfsdsession *sep,
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uint8_t *sessionid);
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static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
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int dont_replycache, struct nfsdsession **sepp, int *slotposp);
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static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp);
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static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp,
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nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p);
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static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp);
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static void nfsrv_freelayoutlist(nfsquad_t clientid);
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static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype,
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int iomode);
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static void nfsrv_freealllayouts(void);
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static void nfsrv_freedevid(struct nfsdevice *ds);
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static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p,
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struct nfsdevice **dsp);
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static void nfsrv_deleteds(struct nfsdevice *fndds);
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static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost);
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static void nfsrv_freealldevids(void);
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static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp,
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int maxcnt, NFSPROC_T *p);
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static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp,
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fhandle_t *fhp, struct nfslayout *lyp, int changed, int laytype,
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NFSPROC_T *p);
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static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype,
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NFSPROC_T *, struct nfslayout **lypp);
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static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt);
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static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode,
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fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs);
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static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode,
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int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs);
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static int nfsrv_dontlayout(fhandle_t *fhp);
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static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf,
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vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p,
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vnode_t *tvpp);
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static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp);
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static int nfsrv_checkmachcred(int op, struct nfsrv_descript *nd,
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struct nfsclient *clp);
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/*
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* Scan the client list for a match and either return the current one,
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* create a new entry or return an error.
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* If returning a non-error, the clp structure must either be linked into
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* the client list or free'd.
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*/
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int
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nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp,
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nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p)
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{
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struct nfsclient *clp = NULL, *new_clp = *new_clpp;
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int i, error = 0, ret;
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struct nfsstate *stp, *tstp;
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#ifdef INET
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struct sockaddr_in *sin, *rin;
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#endif
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#ifdef INET6
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struct sockaddr_in6 *sin6, *rin6;
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#endif
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struct nfsdsession *sep, *nsep;
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int zapit = 0, gotit, hasstate = 0, igotlock;
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static u_int64_t confirm_index = 0;
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/*
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* Check for state resource limit exceeded.
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*/
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if (nfsrv_openpluslock > nfsrv_v4statelimit) {
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error = NFSERR_RESOURCE;
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goto out;
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}
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if (nfsrv_issuedelegs == 0 ||
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((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0))
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/*
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* Don't do callbacks when delegations are disabled or
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* for AUTH_GSS unless enabled via nfsrv_nogsscallback.
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* If establishing a callback connection is attempted
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* when a firewall is blocking the callback path, the
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* server may wait too long for the connect attempt to
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* succeed during the Open. Some clients, such as Linux,
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* may timeout and give up on the Open before the server
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* replies. Also, since AUTH_GSS callbacks are not
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* yet interoperability tested, they might cause the
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* server to crap out, if they get past the Init call to
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* the client.
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*/
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new_clp->lc_program = 0;
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/* Lock out other nfsd threads */
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NFSLOCKV4ROOTMUTEX();
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nfsv4_relref(&nfsv4rootfs_lock);
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do {
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igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
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NFSV4ROOTLOCKMUTEXPTR, NULL);
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} while (!igotlock);
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NFSUNLOCKV4ROOTMUTEX();
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/*
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* Search for a match in the client list.
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*/
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gotit = i = 0;
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while (i < nfsrv_clienthashsize && !gotit) {
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LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) {
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if (new_clp->lc_idlen == clp->lc_idlen &&
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!NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) {
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gotit = 1;
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break;
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}
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}
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if (gotit == 0)
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i++;
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}
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if (!gotit ||
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(clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) {
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if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) {
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/*
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* For NFSv4.1, if confirmp->lval[1] is non-zero, the
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* client is trying to update a confirmed clientid.
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*/
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NFSLOCKV4ROOTMUTEX();
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nfsv4_unlock(&nfsv4rootfs_lock, 1);
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NFSUNLOCKV4ROOTMUTEX();
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confirmp->lval[1] = 0;
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error = NFSERR_NOENT;
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goto out;
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}
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/*
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* Get rid of the old one.
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*/
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if (i != nfsrv_clienthashsize) {
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LIST_REMOVE(clp, lc_hash);
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nfsrv_cleanclient(clp, p);
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nfsrv_freedeleglist(&clp->lc_deleg);
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nfsrv_freedeleglist(&clp->lc_olddeleg);
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zapit = 1;
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}
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/*
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* Add it after assigning a client id to it.
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*/
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new_clp->lc_flags |= LCL_NEEDSCONFIRM;
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if ((nd->nd_flag & ND_NFSV41) != 0) {
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confirmp->lval[0] = ++confirm_index;
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new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1;
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} else
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confirmp->qval = new_clp->lc_confirm.qval =
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++confirm_index;
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clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
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NFSD_VNET(nfsrvboottime);
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clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
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nfsrv_nextclientindex();
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new_clp->lc_stateindex = 0;
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new_clp->lc_statemaxindex = 0;
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new_clp->lc_prevsess = 0;
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new_clp->lc_cbref = 0;
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new_clp->lc_expiry = nfsrv_leaseexpiry();
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LIST_INIT(&new_clp->lc_open);
|
|
LIST_INIT(&new_clp->lc_deleg);
|
|
LIST_INIT(&new_clp->lc_olddeleg);
|
|
LIST_INIT(&new_clp->lc_session);
|
|
for (i = 0; i < nfsrv_statehashsize; i++)
|
|
LIST_INIT(&new_clp->lc_stateid[i]);
|
|
LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
|
|
lc_hash);
|
|
NFSD_VNET(nfsstatsv1_p)->srvclients++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_clients++;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
if (zapit)
|
|
nfsrv_zapclient(clp, p);
|
|
*new_clpp = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, handle the cases where the id is already issued.
|
|
*/
|
|
if (nfsrv_notsamecredname(NFSV4OP_EXCHANGEID, nd, clp)) {
|
|
/*
|
|
* Check to see if there is expired state that should go away.
|
|
*/
|
|
if (clp->lc_expiry < NFSD_MONOSEC &&
|
|
(!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) {
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
}
|
|
|
|
/*
|
|
* If there is outstanding state, then reply NFSERR_CLIDINUSE per
|
|
* RFC3530 Sec. 8.1.2 last para.
|
|
*/
|
|
if (!LIST_EMPTY(&clp->lc_deleg)) {
|
|
hasstate = 1;
|
|
} else if (LIST_EMPTY(&clp->lc_open)) {
|
|
hasstate = 0;
|
|
} else {
|
|
hasstate = 0;
|
|
/* Look for an Open on the OpenOwner */
|
|
LIST_FOREACH(stp, &clp->lc_open, ls_list) {
|
|
if (!LIST_EMPTY(&stp->ls_open)) {
|
|
hasstate = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (hasstate) {
|
|
/*
|
|
* If the uid doesn't match, return NFSERR_CLIDINUSE after
|
|
* filling out the correct ipaddr and portnum.
|
|
*/
|
|
switch (clp->lc_req.nr_nam->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam;
|
|
rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
|
|
sin->sin_addr.s_addr = rin->sin_addr.s_addr;
|
|
sin->sin_port = rin->sin_port;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam;
|
|
rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
|
|
sin6->sin6_addr = rin6->sin6_addr;
|
|
sin6->sin6_port = rin6->sin6_port;
|
|
break;
|
|
#endif
|
|
}
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = NFSERR_CLIDINUSE;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) {
|
|
/*
|
|
* If the verifier has changed, the client has rebooted
|
|
* and a new client id is issued. The old state info
|
|
* can be thrown away once the SETCLIENTID_CONFIRM occurs.
|
|
*/
|
|
LIST_REMOVE(clp, lc_hash);
|
|
|
|
/* Get rid of all sessions on this clientid. */
|
|
LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) {
|
|
ret = nfsrv_freesession(NULL, sep, NULL);
|
|
if (ret != 0)
|
|
printf("nfsrv_setclient: verifier changed free"
|
|
" session failed=%d\n", ret);
|
|
}
|
|
|
|
new_clp->lc_flags |= LCL_NEEDSCONFIRM;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
confirmp->lval[0] = ++confirm_index;
|
|
new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1;
|
|
} else
|
|
confirmp->qval = new_clp->lc_confirm.qval =
|
|
++confirm_index;
|
|
clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
|
|
NFSD_VNET(nfsrvboottime);
|
|
clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
|
|
nfsrv_nextclientindex();
|
|
new_clp->lc_stateindex = 0;
|
|
new_clp->lc_statemaxindex = 0;
|
|
new_clp->lc_prevsess = 0;
|
|
new_clp->lc_cbref = 0;
|
|
new_clp->lc_expiry = nfsrv_leaseexpiry();
|
|
|
|
/*
|
|
* Save the state until confirmed.
|
|
*/
|
|
LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg,
|
|
ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
for (i = 0; i < nfsrv_statehashsize; i++) {
|
|
LIST_NEWHEAD(&new_clp->lc_stateid[i],
|
|
&clp->lc_stateid[i], ls_hash);
|
|
LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
|
|
tstp->ls_clp = new_clp;
|
|
}
|
|
LIST_INIT(&new_clp->lc_session);
|
|
LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
|
|
lc_hash);
|
|
NFSD_VNET(nfsstatsv1_p)->srvclients++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_clients++;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
/*
|
|
* Must wait until any outstanding callback on the old clp
|
|
* completes.
|
|
*/
|
|
NFSLOCKSTATE();
|
|
while (clp->lc_cbref) {
|
|
clp->lc_flags |= LCL_WAKEUPWANTED;
|
|
(void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
|
|
"nfsd clp", 10 * hz);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
nfsrv_zapclient(clp, p);
|
|
*new_clpp = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/* For NFSv4.1, mark that we found a confirmed clientid. */
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
clientidp->lval[0] = clp->lc_clientid.lval[0];
|
|
clientidp->lval[1] = clp->lc_clientid.lval[1];
|
|
confirmp->lval[0] = 0; /* Ignored by client */
|
|
confirmp->lval[1] = 1;
|
|
} else {
|
|
/*
|
|
* id and verifier match, so update the net address info
|
|
* and get rid of any existing callback authentication
|
|
* handle, so a new one will be acquired.
|
|
*/
|
|
LIST_REMOVE(clp, lc_hash);
|
|
new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
|
|
new_clp->lc_expiry = nfsrv_leaseexpiry();
|
|
confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index;
|
|
clientidp->lval[0] = new_clp->lc_clientid.lval[0] =
|
|
clp->lc_clientid.lval[0];
|
|
clientidp->lval[1] = new_clp->lc_clientid.lval[1] =
|
|
clp->lc_clientid.lval[1];
|
|
new_clp->lc_delegtime = clp->lc_delegtime;
|
|
new_clp->lc_stateindex = clp->lc_stateindex;
|
|
new_clp->lc_statemaxindex = clp->lc_statemaxindex;
|
|
new_clp->lc_cbref = 0;
|
|
LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_open, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list);
|
|
LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list)
|
|
tstp->ls_clp = new_clp;
|
|
for (i = 0; i < nfsrv_statehashsize; i++) {
|
|
LIST_NEWHEAD(&new_clp->lc_stateid[i],
|
|
&clp->lc_stateid[i], ls_hash);
|
|
LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash)
|
|
tstp->ls_clp = new_clp;
|
|
}
|
|
LIST_INIT(&new_clp->lc_session);
|
|
LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp,
|
|
lc_hash);
|
|
NFSD_VNET(nfsstatsv1_p)->srvclients++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_clients++;
|
|
}
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
if ((nd->nd_flag & ND_NFSV41) == 0) {
|
|
/*
|
|
* Must wait until any outstanding callback on the old clp
|
|
* completes.
|
|
*/
|
|
NFSLOCKSTATE();
|
|
while (clp->lc_cbref) {
|
|
clp->lc_flags |= LCL_WAKEUPWANTED;
|
|
(void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1,
|
|
"nfsdclp", 10 * hz);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
nfsrv_zapclient(clp, p);
|
|
*new_clpp = NULL;
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check to see if the client id exists and optionally confirm it.
|
|
*/
|
|
int
|
|
nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp,
|
|
struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram,
|
|
struct nfsrv_descript *nd, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfsstate *stp;
|
|
int i;
|
|
struct nfsclienthashhead *hp;
|
|
int error = 0, igotlock, doneok;
|
|
struct nfssessionhash *shp;
|
|
struct nfsdsession *sep;
|
|
uint64_t sessid[2];
|
|
bool sess_replay;
|
|
static uint64_t next_sess = 0;
|
|
|
|
if (clpp)
|
|
*clpp = NULL;
|
|
if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 ||
|
|
opflags != CLOPS_RENEW) && NFSD_VNET(nfsrvboottime) !=
|
|
clientid.lval[0]) {
|
|
error = NFSERR_STALECLIENTID;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If called with opflags == CLOPS_RENEW, the State Lock is
|
|
* already held. Otherwise, we need to get either that or,
|
|
* for the case of Confirm, lock out the nfsd threads.
|
|
*/
|
|
if (opflags & CLOPS_CONFIRM) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
do {
|
|
igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (!igotlock);
|
|
/*
|
|
* Create a new sessionid here, since we need to do it where
|
|
* there is a mutex held to serialize update of next_sess.
|
|
*/
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
sessid[0] = ++next_sess;
|
|
sessid[1] = clientid.qval;
|
|
}
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
} else if (opflags != CLOPS_RENEW) {
|
|
NFSLOCKSTATE();
|
|
}
|
|
|
|
/* For NFSv4.1, the clp is acquired from the associated session. */
|
|
if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 &&
|
|
opflags == CLOPS_RENEW) {
|
|
clp = NULL;
|
|
if ((nd->nd_flag & ND_HASSEQUENCE) != 0) {
|
|
shp = NFSSESSIONHASH(nd->nd_sessionid);
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(nd->nd_sessionid);
|
|
if (sep != NULL)
|
|
clp = sep->sess_clp;
|
|
NFSUNLOCKSESSION(shp);
|
|
}
|
|
} else {
|
|
hp = NFSCLIENTHASH(clientid);
|
|
LIST_FOREACH(clp, hp, lc_hash) {
|
|
if (clp->lc_clientid.lval[1] == clientid.lval[1])
|
|
break;
|
|
}
|
|
}
|
|
if (clp == NULL) {
|
|
if (opflags & CLOPS_CONFIRM)
|
|
error = NFSERR_STALECLIENTID;
|
|
else
|
|
error = NFSERR_EXPIRED;
|
|
} else if (clp->lc_flags & LCL_ADMINREVOKED) {
|
|
/*
|
|
* If marked admin revoked, just return the error.
|
|
*/
|
|
error = NFSERR_ADMINREVOKED;
|
|
}
|
|
if (error) {
|
|
if (opflags & CLOPS_CONFIRM) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
} else if (opflags != CLOPS_RENEW) {
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Perform any operations specified by the opflags.
|
|
*/
|
|
if (opflags & CLOPS_CONFIRM) {
|
|
sess_replay = false;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
/*
|
|
* For the case where lc_confirm.lval[0] == confirm.lval[0],
|
|
* use the new session, but with the previous sessionid.
|
|
* This is not exactly what the RFC describes, but should
|
|
* result in the same reply as the previous CreateSession.
|
|
*/
|
|
if (clp->lc_confirm.lval[0] + 1 == confirm.lval[0]) {
|
|
clp->lc_confirm.lval[0] = confirm.lval[0];
|
|
clp->lc_prevsess = sessid[0];
|
|
} else if (clp->lc_confirm.lval[0] == confirm.lval[0]) {
|
|
if (clp->lc_prevsess == 0)
|
|
error = NFSERR_SEQMISORDERED;
|
|
else
|
|
sessid[0] = clp->lc_prevsess;
|
|
sess_replay = true;
|
|
} else
|
|
error = NFSERR_SEQMISORDERED;
|
|
} else if ((nd->nd_flag & ND_NFSV41) == 0 &&
|
|
clp->lc_confirm.qval != confirm.qval)
|
|
error = NFSERR_STALECLIENTID;
|
|
if (error == 0 && nfsrv_notsamecredname(NFSV4OP_CREATESESSION,
|
|
nd, clp))
|
|
error = NFSERR_CLIDINUSE;
|
|
|
|
if (!error) {
|
|
if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) ==
|
|
LCL_NEEDSCONFIRM) {
|
|
/*
|
|
* Hang onto the delegations (as old delegations)
|
|
* for an Open with CLAIM_DELEGATE_PREV unless in
|
|
* grace, but get rid of the rest of the state.
|
|
*/
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
if (nfsrv_checkgrace(nd, clp, 0)) {
|
|
/* In grace, so just delete delegations */
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
} else {
|
|
LIST_FOREACH(stp, &clp->lc_deleg, ls_list)
|
|
stp->ls_flags |= NFSLCK_OLDDELEG;
|
|
clp->lc_delegtime = NFSD_MONOSEC +
|
|
nfsrv_lease + NFSRV_LEASEDELTA;
|
|
LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg,
|
|
ls_list);
|
|
}
|
|
if ((nd->nd_flag & ND_NFSV41) != 0)
|
|
clp->lc_program = cbprogram;
|
|
}
|
|
clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN);
|
|
if (clp->lc_program)
|
|
clp->lc_flags |= LCL_NEEDSCBNULL;
|
|
/* For NFSv4.1, link the session onto the client. */
|
|
if (nsep != NULL) {
|
|
/* Hold a reference on the xprt for a backchannel. */
|
|
if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN)
|
|
!= 0 && !sess_replay) {
|
|
if (clp->lc_req.nr_client == NULL)
|
|
clp->lc_req.nr_client = (struct __rpc_client *)
|
|
clnt_bck_create(nd->nd_xprt->xp_socket,
|
|
cbprogram, NFSV4_CBVERS);
|
|
if (clp->lc_req.nr_client != NULL) {
|
|
SVC_ACQUIRE(nd->nd_xprt);
|
|
CLNT_ACQUIRE(clp->lc_req.nr_client);
|
|
nd->nd_xprt->xp_p2 = clp->lc_req.nr_client;
|
|
/* Disable idle timeout. */
|
|
nd->nd_xprt->xp_idletimeout = 0;
|
|
nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
|
|
} else
|
|
nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN;
|
|
}
|
|
NFSBCOPY(sessid, nsep->sess_sessionid,
|
|
NFSX_V4SESSIONID);
|
|
NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid,
|
|
NFSX_V4SESSIONID);
|
|
if (!sess_replay) {
|
|
shp = NFSSESSIONHASH(nsep->sess_sessionid);
|
|
NFSLOCKSTATE();
|
|
NFSLOCKSESSION(shp);
|
|
LIST_INSERT_HEAD(&shp->list, nsep, sess_hash);
|
|
LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list);
|
|
nsep->sess_clp = clp;
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
}
|
|
}
|
|
} else if (clp->lc_flags & LCL_NEEDSCONFIRM) {
|
|
error = NFSERR_EXPIRED;
|
|
}
|
|
|
|
/*
|
|
* If called by the Renew Op, we must check the principal.
|
|
*/
|
|
if (!error && (opflags & CLOPS_RENEWOP)) {
|
|
if (nfsrv_notsamecredname(0, nd, clp)) {
|
|
doneok = 0;
|
|
for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) {
|
|
LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
|
|
if ((stp->ls_flags & NFSLCK_OPEN) &&
|
|
stp->ls_uid == nd->nd_cred->cr_uid) {
|
|
doneok = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!doneok)
|
|
error = NFSERR_ACCES;
|
|
}
|
|
if (!error && (clp->lc_flags & LCL_CBDOWN))
|
|
error = NFSERR_CBPATHDOWN;
|
|
}
|
|
if ((!error || error == NFSERR_CBPATHDOWN) &&
|
|
(opflags & CLOPS_RENEW)) {
|
|
clp->lc_expiry = nfsrv_leaseexpiry();
|
|
}
|
|
if (opflags & CLOPS_CONFIRM) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
} else if (opflags != CLOPS_RENEW) {
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
if (clpp)
|
|
*clpp = clp;
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Perform the NFSv4.1 destroy clientid.
|
|
*/
|
|
int
|
|
nfsrv_destroyclient(struct nfsrv_descript *nd, nfsquad_t clientid, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfsclienthashhead *hp;
|
|
int error = 0, i, igotlock;
|
|
|
|
if (NFSD_VNET(nfsrvboottime) != clientid.lval[0]) {
|
|
error = NFSERR_STALECLIENTID;
|
|
goto out;
|
|
}
|
|
|
|
/* Lock out other nfsd threads */
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
do {
|
|
igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (igotlock == 0);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
hp = NFSCLIENTHASH(clientid);
|
|
LIST_FOREACH(clp, hp, lc_hash) {
|
|
if (clp->lc_clientid.lval[1] == clientid.lval[1])
|
|
break;
|
|
}
|
|
if (clp == NULL) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
/* Just return ok, since it is gone. */
|
|
goto out;
|
|
}
|
|
|
|
/* Check for the SP4_MACH_CRED case. */
|
|
error = nfsrv_checkmachcred(NFSV4OP_DESTROYCLIENTID, nd, clp);
|
|
if (error != 0) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Free up all layouts on the clientid. Should the client return the
|
|
* layouts?
|
|
*/
|
|
nfsrv_freelayoutlist(clientid);
|
|
|
|
/* Scan for state on the clientid. */
|
|
for (i = 0; i < nfsrv_statehashsize; i++)
|
|
if (!LIST_EMPTY(&clp->lc_stateid[i])) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = NFSERR_CLIENTIDBUSY;
|
|
goto out;
|
|
}
|
|
if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = NFSERR_CLIENTIDBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Destroy the clientid and return ok. */
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
LIST_REMOVE(clp, lc_hash);
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
nfsrv_zapclient(clp, p);
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Called from the new nfssvc syscall to admin revoke a clientid.
|
|
* Returns 0 for success, error otherwise.
|
|
*/
|
|
int
|
|
nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp = NULL;
|
|
int i, error = 0;
|
|
int gotit, igotlock;
|
|
|
|
/*
|
|
* First, lock out the nfsd so that state won't change while the
|
|
* revocation record is being written to the stable storage restart
|
|
* file.
|
|
*/
|
|
NFSLOCKV4ROOTMUTEX();
|
|
do {
|
|
igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (!igotlock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
/*
|
|
* Search for a match in the client list.
|
|
*/
|
|
gotit = i = 0;
|
|
while (i < nfsrv_clienthashsize && !gotit) {
|
|
LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) {
|
|
if (revokep->nclid_idlen == clp->lc_idlen &&
|
|
!NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) {
|
|
gotit = 1;
|
|
break;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
if (!gotit) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 0);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, write out the revocation record
|
|
*/
|
|
nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
|
|
nfsrv_backupstable();
|
|
|
|
/*
|
|
* and clear out the state, marking the clientid revoked.
|
|
*/
|
|
clp->lc_flags &= ~LCL_CALLBACKSON;
|
|
clp->lc_flags |= LCL_ADMINREVOKED;
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 0);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Dump out stats for all clients. Called from nfssvc(2), that is used
|
|
* nfsstatsv1.
|
|
*/
|
|
void
|
|
nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt)
|
|
{
|
|
struct nfsclient *clp;
|
|
int i = 0, cnt = 0;
|
|
|
|
/*
|
|
* First, get a reference on the nfsv4rootfs_lock so that an
|
|
* exclusive lock cannot be acquired while dumping the clients.
|
|
*/
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Rattle through the client lists until done.
|
|
*/
|
|
while (i < nfsrv_clienthashsize && cnt < maxcnt) {
|
|
clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]);
|
|
while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i]) && cnt <
|
|
maxcnt) {
|
|
nfsrv_dumpaclient(clp, &dumpp[cnt]);
|
|
cnt++;
|
|
clp = LIST_NEXT(clp, lc_hash);
|
|
}
|
|
i++;
|
|
}
|
|
if (cnt < maxcnt)
|
|
dumpp[cnt].ndcl_clid.nclid_idlen = 0;
|
|
NFSUNLOCKSTATE();
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
/*
|
|
* Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd.
|
|
*/
|
|
static void
|
|
nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp)
|
|
{
|
|
struct nfsstate *stp, *openstp, *lckownstp;
|
|
struct nfslock *lop;
|
|
sa_family_t af;
|
|
#ifdef INET
|
|
struct sockaddr_in *rin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *rin6;
|
|
#endif
|
|
|
|
dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0;
|
|
dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0;
|
|
dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0;
|
|
dumpp->ndcl_flags = clp->lc_flags;
|
|
dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen;
|
|
NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen);
|
|
af = clp->lc_req.nr_nam->sa_family;
|
|
dumpp->ndcl_addrfam = af;
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
|
|
dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
|
|
dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr;
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Now, scan the state lists and total up the opens and locks.
|
|
*/
|
|
LIST_FOREACH(stp, &clp->lc_open, ls_list) {
|
|
dumpp->ndcl_nopenowners++;
|
|
LIST_FOREACH(openstp, &stp->ls_open, ls_list) {
|
|
dumpp->ndcl_nopens++;
|
|
LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) {
|
|
dumpp->ndcl_nlockowners++;
|
|
LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) {
|
|
dumpp->ndcl_nlocks++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* and the delegation lists.
|
|
*/
|
|
LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
|
|
dumpp->ndcl_ndelegs++;
|
|
}
|
|
LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
|
|
dumpp->ndcl_nolddelegs++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dump out lock stats for a file.
|
|
*/
|
|
void
|
|
nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt,
|
|
NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *stp;
|
|
struct nfslock *lop;
|
|
int cnt = 0;
|
|
struct nfslockfile *lfp;
|
|
sa_family_t af;
|
|
#ifdef INET
|
|
struct sockaddr_in *rin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *rin6;
|
|
#endif
|
|
int ret;
|
|
fhandle_t nfh;
|
|
|
|
ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p);
|
|
/*
|
|
* First, get a reference on the nfsv4rootfs_lock so that an
|
|
* exclusive lock on it cannot be acquired while dumping the locks.
|
|
*/
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
NFSLOCKSTATE();
|
|
if (!ret)
|
|
ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0);
|
|
if (ret) {
|
|
ldumpp[0].ndlck_clid.nclid_idlen = 0;
|
|
NFSUNLOCKSTATE();
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* For each open share on file, dump it out.
|
|
*/
|
|
stp = LIST_FIRST(&lfp->lf_open);
|
|
while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) {
|
|
ldumpp[cnt].ndlck_flags = stp->ls_flags;
|
|
ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
|
|
ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
|
|
ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
|
|
ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
|
|
ldumpp[cnt].ndlck_owner.nclid_idlen =
|
|
stp->ls_openowner->ls_ownerlen;
|
|
NFSBCOPY(stp->ls_openowner->ls_owner,
|
|
ldumpp[cnt].ndlck_owner.nclid_id,
|
|
stp->ls_openowner->ls_ownerlen);
|
|
ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
|
|
NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
|
|
stp->ls_clp->lc_idlen);
|
|
af = stp->ls_clp->lc_req.nr_nam->sa_family;
|
|
ldumpp[cnt].ndlck_addrfam = af;
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
rin6 = (struct sockaddr_in6 *)
|
|
stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
|
|
break;
|
|
#endif
|
|
}
|
|
stp = LIST_NEXT(stp, ls_file);
|
|
cnt++;
|
|
}
|
|
|
|
/*
|
|
* and all locks.
|
|
*/
|
|
lop = LIST_FIRST(&lfp->lf_lock);
|
|
while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) {
|
|
stp = lop->lo_stp;
|
|
ldumpp[cnt].ndlck_flags = lop->lo_flags;
|
|
ldumpp[cnt].ndlck_first = lop->lo_first;
|
|
ldumpp[cnt].ndlck_end = lop->lo_end;
|
|
ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
|
|
ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
|
|
ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
|
|
ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
|
|
ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen;
|
|
NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id,
|
|
stp->ls_ownerlen);
|
|
ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
|
|
NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
|
|
stp->ls_clp->lc_idlen);
|
|
af = stp->ls_clp->lc_req.nr_nam->sa_family;
|
|
ldumpp[cnt].ndlck_addrfam = af;
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
rin6 = (struct sockaddr_in6 *)
|
|
stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
|
|
break;
|
|
#endif
|
|
}
|
|
lop = LIST_NEXT(lop, lo_lckfile);
|
|
cnt++;
|
|
}
|
|
|
|
/*
|
|
* and the delegations.
|
|
*/
|
|
stp = LIST_FIRST(&lfp->lf_deleg);
|
|
while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) {
|
|
ldumpp[cnt].ndlck_flags = stp->ls_flags;
|
|
ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid;
|
|
ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0];
|
|
ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1];
|
|
ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2];
|
|
ldumpp[cnt].ndlck_owner.nclid_idlen = 0;
|
|
ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen;
|
|
NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id,
|
|
stp->ls_clp->lc_idlen);
|
|
af = stp->ls_clp->lc_req.nr_nam->sa_family;
|
|
ldumpp[cnt].ndlck_addrfam = af;
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
rin6 = (struct sockaddr_in6 *)
|
|
stp->ls_clp->lc_req.nr_nam;
|
|
ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr;
|
|
break;
|
|
#endif
|
|
}
|
|
stp = LIST_NEXT(stp, ls_file);
|
|
cnt++;
|
|
}
|
|
|
|
/*
|
|
* If list isn't full, mark end of list by setting the client name
|
|
* to zero length.
|
|
*/
|
|
if (cnt < maxcnt)
|
|
ldumpp[cnt].ndlck_clid.nclid_idlen = 0;
|
|
NFSUNLOCKSTATE();
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
/*
|
|
* Server timer routine. It can scan any linked list, so long
|
|
* as it holds the spin/mutex lock and there is no exclusive lock on
|
|
* nfsv4rootfs_lock.
|
|
* (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok
|
|
* to do this from a callout, since the spin locks work. For
|
|
* Darwin, I'm not sure what will work correctly yet.)
|
|
* Should be called once per second.
|
|
*/
|
|
void
|
|
nfsrv_servertimer(void *arg __unused)
|
|
{
|
|
struct nfsclient *clp, *nclp;
|
|
struct nfsstate *stp, *nstp;
|
|
int got_ref, i;
|
|
|
|
/*
|
|
* Make sure nfsboottime is set. This is used by V3 as well
|
|
* as V4. Note that nfsboottime is not nfsrvboottime, which is
|
|
* only used by the V4 server for leases.
|
|
*/
|
|
if (nfsboottime.tv_sec == 0)
|
|
NFSSETBOOTTIME(nfsboottime);
|
|
|
|
/*
|
|
* If server hasn't started yet, just return.
|
|
*/
|
|
NFSLOCKSTATE();
|
|
if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce == 0) {
|
|
NFSUNLOCKSTATE();
|
|
return;
|
|
}
|
|
if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE)) {
|
|
if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags &
|
|
NFSNSF_GRACEOVER) &&
|
|
NFSD_MONOSEC > NFSD_VNET(nfsrv_stablefirst).nsf_eograce)
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_flags |=
|
|
(NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
|
|
NFSUNLOCKSTATE();
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Try and get a reference count on the nfsv4rootfs_lock so that
|
|
* no nfsd thread can acquire an exclusive lock on it before this
|
|
* call is done. If it is already exclusively locked, just return.
|
|
*/
|
|
NFSLOCKV4ROOTMUTEX();
|
|
got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
if (got_ref == 0) {
|
|
NFSUNLOCKSTATE();
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* For each client...
|
|
*/
|
|
for (i = 0; i < nfsrv_clienthashsize; i++) {
|
|
clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]);
|
|
while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i])) {
|
|
nclp = LIST_NEXT(clp, lc_hash);
|
|
if (!(clp->lc_flags & LCL_EXPIREIT)) {
|
|
if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC
|
|
&& ((LIST_EMPTY(&clp->lc_deleg)
|
|
&& LIST_EMPTY(&clp->lc_open)) ||
|
|
nfsrv_clients > nfsrv_clienthighwater)) ||
|
|
(clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC ||
|
|
(clp->lc_expiry < NFSD_MONOSEC &&
|
|
(nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) {
|
|
/*
|
|
* Lease has expired several nfsrv_lease times ago:
|
|
* PLUS
|
|
* - no state is associated with it
|
|
* OR
|
|
* - above high water mark for number of clients
|
|
* (nfsrv_clienthighwater should be large enough
|
|
* that this only occurs when clients fail to
|
|
* use the same nfs_client_id4.id. Maybe somewhat
|
|
* higher that the maximum number of clients that
|
|
* will mount this server?)
|
|
* OR
|
|
* Lease has expired a very long time ago
|
|
* OR
|
|
* Lease has expired PLUS the number of opens + locks
|
|
* has exceeded 90% of capacity
|
|
*
|
|
* --> Mark for expiry. The actual expiry will be done
|
|
* by an nfsd sometime soon.
|
|
*/
|
|
clp->lc_flags |= LCL_EXPIREIT;
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_flags |=
|
|
(NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT);
|
|
} else {
|
|
/*
|
|
* If there are no opens, increment no open tick cnt
|
|
* If time exceeds NFSNOOPEN, mark it to be thrown away
|
|
* otherwise, if there is an open, reset no open time
|
|
* Hopefully, this will avoid excessive re-creation
|
|
* of open owners and subsequent open confirms.
|
|
*/
|
|
stp = LIST_FIRST(&clp->lc_open);
|
|
while (stp != LIST_END(&clp->lc_open)) {
|
|
nstp = LIST_NEXT(stp, ls_list);
|
|
if (LIST_EMPTY(&stp->ls_open)) {
|
|
stp->ls_noopens++;
|
|
if (stp->ls_noopens > NFSNOOPEN ||
|
|
(nfsrv_openpluslock * 2) >
|
|
nfsrv_v4statelimit)
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_flags |=
|
|
NFSNSF_NOOPENS;
|
|
} else {
|
|
stp->ls_noopens = 0;
|
|
}
|
|
stp = nstp;
|
|
}
|
|
}
|
|
}
|
|
clp = nclp;
|
|
}
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
/*
|
|
* The following set of functions free up the various data structures.
|
|
*/
|
|
/*
|
|
* Clear out all open/lock state related to this nfsclient.
|
|
* Caller must hold an exclusive lock on nfsv4rootfs_lock, so that
|
|
* there are no other active nfsd threads.
|
|
*/
|
|
void
|
|
nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *stp, *nstp;
|
|
struct nfsdsession *sep, *nsep;
|
|
|
|
LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp)
|
|
nfsrv_freeopenowner(stp, 1, p);
|
|
if ((clp->lc_flags & LCL_ADMINREVOKED) == 0)
|
|
LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep)
|
|
(void)nfsrv_freesession(NULL, sep, NULL);
|
|
}
|
|
|
|
/*
|
|
* Free a client that has been cleaned. It should also already have been
|
|
* removed from the lists.
|
|
* (Just to be safe w.r.t. newnfs_disconnect(), call this function when
|
|
* softclock interrupts are enabled.)
|
|
*/
|
|
void
|
|
nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p)
|
|
{
|
|
|
|
#ifdef notyet
|
|
if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) ==
|
|
(LCL_GSS | LCL_CALLBACKSON) &&
|
|
(clp->lc_hand.nfsh_flag & NFSG_COMPLETE) &&
|
|
clp->lc_handlelen > 0) {
|
|
clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE;
|
|
clp->lc_hand.nfsh_flag |= NFSG_DESTROYED;
|
|
(void) nfsrv_docallback(clp, NFSV4PROC_CBNULL,
|
|
NULL, 0, NULL, NULL, NULL, 0, p);
|
|
}
|
|
#endif
|
|
newnfs_disconnect(NULL, &clp->lc_req);
|
|
free(clp->lc_req.nr_nam, M_SONAME);
|
|
NFSFREEMUTEX(&clp->lc_req.nr_mtx);
|
|
free(clp->lc_stateid, M_NFSDCLIENT);
|
|
free(clp, M_NFSDCLIENT);
|
|
NFSLOCKSTATE();
|
|
NFSD_VNET(nfsstatsv1_p)->srvclients--;
|
|
nfsrv_openpluslock--;
|
|
nfsrv_clients--;
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
|
|
/*
|
|
* Free a list of delegation state structures.
|
|
* (This function will also free all nfslockfile structures that no
|
|
* longer have associated state.)
|
|
*/
|
|
void
|
|
nfsrv_freedeleglist(struct nfsstatehead *sthp)
|
|
{
|
|
struct nfsstate *stp, *nstp;
|
|
|
|
LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) {
|
|
nfsrv_freedeleg(stp);
|
|
}
|
|
LIST_INIT(sthp);
|
|
}
|
|
|
|
/*
|
|
* Free up a delegation.
|
|
*/
|
|
static void
|
|
nfsrv_freedeleg(struct nfsstate *stp)
|
|
{
|
|
struct nfslockfile *lfp;
|
|
|
|
LIST_REMOVE(stp, ls_hash);
|
|
LIST_REMOVE(stp, ls_list);
|
|
LIST_REMOVE(stp, ls_file);
|
|
if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0)
|
|
nfsrv_writedelegcnt--;
|
|
lfp = stp->ls_lfp;
|
|
if (LIST_EMPTY(&lfp->lf_open) &&
|
|
LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) &&
|
|
LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
|
|
lfp->lf_usecount == 0 &&
|
|
nfsv4_testlock(&lfp->lf_locallock_lck) == 0)
|
|
nfsrv_freenfslockfile(lfp);
|
|
free(stp, M_NFSDSTATE);
|
|
NFSD_VNET(nfsstatsv1_p)->srvdelegates--;
|
|
nfsrv_openpluslock--;
|
|
nfsrv_delegatecnt--;
|
|
}
|
|
|
|
/*
|
|
* This function frees an open owner and all associated opens.
|
|
*/
|
|
static void
|
|
nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *nstp, *tstp;
|
|
|
|
LIST_REMOVE(stp, ls_list);
|
|
/*
|
|
* Now, free all associated opens.
|
|
*/
|
|
nstp = LIST_FIRST(&stp->ls_open);
|
|
while (nstp != LIST_END(&stp->ls_open)) {
|
|
tstp = nstp;
|
|
nstp = LIST_NEXT(nstp, ls_list);
|
|
(void) nfsrv_freeopen(tstp, NULL, cansleep, p);
|
|
}
|
|
if (stp->ls_op)
|
|
nfsrvd_derefcache(stp->ls_op);
|
|
free(stp, M_NFSDSTATE);
|
|
NFSD_VNET(nfsstatsv1_p)->srvopenowners--;
|
|
nfsrv_openpluslock--;
|
|
}
|
|
|
|
/*
|
|
* This function frees an open (nfsstate open structure) with all associated
|
|
* lock_owners and locks. It also frees the nfslockfile structure iff there
|
|
* are no other opens on the file.
|
|
* Returns 1 if it free'd the nfslockfile, 0 otherwise.
|
|
*/
|
|
static int
|
|
nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *nstp, *tstp;
|
|
struct nfslockfile *lfp;
|
|
int ret;
|
|
|
|
LIST_REMOVE(stp, ls_hash);
|
|
LIST_REMOVE(stp, ls_list);
|
|
LIST_REMOVE(stp, ls_file);
|
|
|
|
lfp = stp->ls_lfp;
|
|
/*
|
|
* Now, free all lockowners associated with this open.
|
|
*/
|
|
LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp)
|
|
nfsrv_freelockowner(tstp, vp, cansleep, p);
|
|
|
|
/*
|
|
* The nfslockfile is freed here if there are no locks
|
|
* associated with the open.
|
|
* If there are locks associated with the open, the
|
|
* nfslockfile structure can be freed via nfsrv_freelockowner().
|
|
* Acquire the state mutex to avoid races with calls to
|
|
* nfsrv_getlockfile().
|
|
*/
|
|
if (cansleep != 0)
|
|
NFSLOCKSTATE();
|
|
if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) &&
|
|
LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) &&
|
|
LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) &&
|
|
lfp->lf_usecount == 0 &&
|
|
(cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) {
|
|
nfsrv_freenfslockfile(lfp);
|
|
ret = 1;
|
|
} else
|
|
ret = 0;
|
|
if (cansleep != 0)
|
|
NFSUNLOCKSTATE();
|
|
free(stp, M_NFSDSTATE);
|
|
NFSD_VNET(nfsstatsv1_p)->srvopens--;
|
|
nfsrv_openpluslock--;
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Frees a lockowner and all associated locks.
|
|
*/
|
|
static void
|
|
nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep,
|
|
NFSPROC_T *p)
|
|
{
|
|
|
|
LIST_REMOVE(stp, ls_hash);
|
|
LIST_REMOVE(stp, ls_list);
|
|
nfsrv_freeallnfslocks(stp, vp, cansleep, p);
|
|
if (stp->ls_op)
|
|
nfsrvd_derefcache(stp->ls_op);
|
|
free(stp, M_NFSDSTATE);
|
|
NFSD_VNET(nfsstatsv1_p)->srvlockowners--;
|
|
nfsrv_openpluslock--;
|
|
}
|
|
|
|
/*
|
|
* Free all the nfs locks on a lockowner.
|
|
*/
|
|
static void
|
|
nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep,
|
|
NFSPROC_T *p)
|
|
{
|
|
struct nfslock *lop, *nlop;
|
|
struct nfsrollback *rlp, *nrlp;
|
|
struct nfslockfile *lfp = NULL;
|
|
int gottvp = 0;
|
|
vnode_t tvp = NULL;
|
|
uint64_t first, end;
|
|
|
|
if (vp != NULL)
|
|
ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked");
|
|
lop = LIST_FIRST(&stp->ls_lock);
|
|
while (lop != LIST_END(&stp->ls_lock)) {
|
|
nlop = LIST_NEXT(lop, lo_lckowner);
|
|
/*
|
|
* Since all locks should be for the same file, lfp should
|
|
* not change.
|
|
*/
|
|
if (lfp == NULL)
|
|
lfp = lop->lo_lfp;
|
|
else if (lfp != lop->lo_lfp)
|
|
panic("allnfslocks");
|
|
/*
|
|
* If vp is NULL and cansleep != 0, a vnode must be acquired
|
|
* from the file handle. This only occurs when called from
|
|
* nfsrv_cleanclient().
|
|
*/
|
|
if (gottvp == 0) {
|
|
if (nfsrv_dolocallocks == 0)
|
|
tvp = NULL;
|
|
else if (vp == NULL && cansleep != 0) {
|
|
tvp = nfsvno_getvp(&lfp->lf_fh);
|
|
if (tvp != NULL)
|
|
NFSVOPUNLOCK(tvp);
|
|
} else
|
|
tvp = vp;
|
|
gottvp = 1;
|
|
}
|
|
|
|
if (tvp != NULL) {
|
|
if (cansleep == 0)
|
|
panic("allnfs2");
|
|
first = lop->lo_first;
|
|
end = lop->lo_end;
|
|
nfsrv_freenfslock(lop);
|
|
nfsrv_localunlock(tvp, lfp, first, end, p);
|
|
LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list,
|
|
nrlp)
|
|
free(rlp, M_NFSDROLLBACK);
|
|
LIST_INIT(&lfp->lf_rollback);
|
|
} else
|
|
nfsrv_freenfslock(lop);
|
|
lop = nlop;
|
|
}
|
|
if (vp == NULL && tvp != NULL)
|
|
vrele(tvp);
|
|
}
|
|
|
|
/*
|
|
* Free an nfslock structure.
|
|
*/
|
|
static void
|
|
nfsrv_freenfslock(struct nfslock *lop)
|
|
{
|
|
|
|
if (lop->lo_lckfile.le_prev != NULL) {
|
|
LIST_REMOVE(lop, lo_lckfile);
|
|
NFSD_VNET(nfsstatsv1_p)->srvlocks--;
|
|
nfsrv_openpluslock--;
|
|
}
|
|
LIST_REMOVE(lop, lo_lckowner);
|
|
free(lop, M_NFSDLOCK);
|
|
}
|
|
|
|
/*
|
|
* This function frees an nfslockfile structure.
|
|
*/
|
|
static void
|
|
nfsrv_freenfslockfile(struct nfslockfile *lfp)
|
|
{
|
|
|
|
LIST_REMOVE(lfp, lf_hash);
|
|
free(lfp, M_NFSDLOCKFILE);
|
|
}
|
|
|
|
/*
|
|
* This function looks up an nfsstate structure via stateid.
|
|
*/
|
|
static int
|
|
nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags,
|
|
struct nfsstate **stpp)
|
|
{
|
|
struct nfsstate *stp;
|
|
struct nfsstatehead *hp;
|
|
int error = 0;
|
|
|
|
*stpp = NULL;
|
|
hp = NFSSTATEHASH(clp, *stateidp);
|
|
LIST_FOREACH(stp, hp, ls_hash) {
|
|
if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
|
|
NFSX_STATEIDOTHER))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If no state id in list, return NFSERR_BADSTATEID.
|
|
*/
|
|
if (stp == LIST_END(hp)) {
|
|
error = NFSERR_BADSTATEID;
|
|
goto out;
|
|
}
|
|
*stpp = stp;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This function gets an nfsstate structure via owner string.
|
|
*/
|
|
static void
|
|
nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp,
|
|
struct nfsstate **stpp)
|
|
{
|
|
struct nfsstate *stp;
|
|
|
|
*stpp = NULL;
|
|
LIST_FOREACH(stp, hp, ls_list) {
|
|
if (new_stp->ls_ownerlen == stp->ls_ownerlen &&
|
|
!NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) {
|
|
*stpp = stp;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lock control function called to update lock status.
|
|
* Returns 0 upon success, -1 if there is no lock and the flags indicate
|
|
* that one isn't to be created and an NFSERR_xxx for other errors.
|
|
* The structures new_stp and new_lop are passed in as pointers that should
|
|
* be set to NULL if the structure is used and shouldn't be free'd.
|
|
* For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are
|
|
* never used and can safely be allocated on the stack. For all other
|
|
* cases, *new_stpp and *new_lopp should be malloc'd before the call,
|
|
* in case they are used.
|
|
*/
|
|
int
|
|
nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp,
|
|
struct nfslock **new_lopp, struct nfslockconflict *cfp,
|
|
nfsquad_t clientid, nfsv4stateid_t *stateidp,
|
|
__unused struct nfsexstuff *exp,
|
|
struct nfsrv_descript *nd, NFSPROC_T *p)
|
|
{
|
|
struct nfslock *lop;
|
|
struct nfsstate *new_stp = *new_stpp;
|
|
struct nfslock *new_lop = *new_lopp;
|
|
struct nfsstate *tstp, *mystp, *nstp;
|
|
int specialid = 0;
|
|
struct nfslockfile *lfp;
|
|
struct nfslock *other_lop = NULL;
|
|
struct nfsstate *stp, *lckstp = NULL;
|
|
struct nfsclient *clp = NULL;
|
|
u_int32_t bits;
|
|
int error = 0, haslock = 0, ret, reterr;
|
|
int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0;
|
|
fhandle_t nfh;
|
|
uint64_t first, end;
|
|
uint32_t lock_flags;
|
|
|
|
if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) {
|
|
/*
|
|
* Note the special cases of "all 1s" or "all 0s" stateids and
|
|
* let reads with all 1s go ahead.
|
|
*/
|
|
if (new_stp->ls_stateid.seqid == 0x0 &&
|
|
new_stp->ls_stateid.other[0] == 0x0 &&
|
|
new_stp->ls_stateid.other[1] == 0x0 &&
|
|
new_stp->ls_stateid.other[2] == 0x0)
|
|
specialid = 1;
|
|
else if (new_stp->ls_stateid.seqid == 0xffffffff &&
|
|
new_stp->ls_stateid.other[0] == 0xffffffff &&
|
|
new_stp->ls_stateid.other[1] == 0xffffffff &&
|
|
new_stp->ls_stateid.other[2] == 0xffffffff)
|
|
specialid = 2;
|
|
}
|
|
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
*/
|
|
error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
|
|
&new_stp->ls_stateid, specialid);
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* Check for state resource limit exceeded.
|
|
*/
|
|
if ((new_stp->ls_flags & NFSLCK_LOCK) &&
|
|
nfsrv_openpluslock > nfsrv_v4statelimit) {
|
|
error = NFSERR_RESOURCE;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* For the lock case, get another nfslock structure,
|
|
* just in case we need it.
|
|
* Malloc now, before we start sifting through the linked lists,
|
|
* in case we have to wait for memory.
|
|
*/
|
|
tryagain:
|
|
if (new_stp->ls_flags & NFSLCK_LOCK)
|
|
other_lop = malloc(sizeof (struct nfslock),
|
|
M_NFSDLOCK, M_WAITOK);
|
|
filestruct_locked = 0;
|
|
reterr = 0;
|
|
lfp = NULL;
|
|
|
|
/*
|
|
* Get the lockfile structure for CFH now, so we can do a sanity
|
|
* check against the stateid, before incrementing the seqid#, since
|
|
* we want to return NFSERR_BADSTATEID on failure and the seqid#
|
|
* shouldn't be incremented for this case.
|
|
* If nfsrv_getlockfile() returns -1, it means "not found", which
|
|
* will be handled later.
|
|
* If we are doing Lock/LockU and local locking is enabled, sleep
|
|
* lock the nfslockfile structure.
|
|
*/
|
|
getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p);
|
|
NFSLOCKSTATE();
|
|
if (getlckret == 0) {
|
|
if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 &&
|
|
nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) {
|
|
getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
|
|
&lfp, &nfh, 1);
|
|
if (getlckret == 0)
|
|
filestruct_locked = 1;
|
|
} else
|
|
getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL,
|
|
&lfp, &nfh, 0);
|
|
}
|
|
if (getlckret != 0 && getlckret != -1)
|
|
reterr = getlckret;
|
|
|
|
if (filestruct_locked != 0) {
|
|
LIST_INIT(&lfp->lf_rollback);
|
|
if ((new_stp->ls_flags & NFSLCK_LOCK)) {
|
|
/*
|
|
* For local locking, do the advisory locking now, so
|
|
* that any conflict can be detected. A failure later
|
|
* can be rolled back locally. If an error is returned,
|
|
* struct nfslockfile has been unlocked and any local
|
|
* locking rolled back.
|
|
*/
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1");
|
|
vnode_unlocked = 1;
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
reterr = nfsrv_locallock(vp, lfp,
|
|
(new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)),
|
|
new_lop->lo_first, new_lop->lo_end, cfp, p);
|
|
NFSLOCKSTATE();
|
|
}
|
|
}
|
|
|
|
if (specialid == 0) {
|
|
if (new_stp->ls_flags & NFSLCK_TEST) {
|
|
/*
|
|
* RFC 3530 does not list LockT as an op that renews a
|
|
* lease, but the consensus seems to be that it is ok
|
|
* for a server to do so.
|
|
*/
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
|
|
/*
|
|
* Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid
|
|
* error returns for LockT, just go ahead and test for a lock,
|
|
* since there are no locks for this client, but other locks
|
|
* can conflict. (ie. same client will always be false)
|
|
*/
|
|
if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED)
|
|
error = 0;
|
|
lckstp = new_stp;
|
|
} else {
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (error == 0)
|
|
/*
|
|
* Look up the stateid
|
|
*/
|
|
error = nfsrv_getstate(clp, &new_stp->ls_stateid,
|
|
new_stp->ls_flags, &stp);
|
|
/*
|
|
* do some sanity checks for an unconfirmed open or a
|
|
* stateid that refers to the wrong file, for an open stateid
|
|
*/
|
|
if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) &&
|
|
((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) ||
|
|
(getlckret == 0 && stp->ls_lfp != lfp))){
|
|
/*
|
|
* NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID
|
|
* The only exception is using SETATTR with SIZE.
|
|
* */
|
|
if ((new_stp->ls_flags &
|
|
(NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR)
|
|
error = NFSERR_BADSTATEID;
|
|
}
|
|
|
|
if (error == 0 &&
|
|
(stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) &&
|
|
getlckret == 0 && stp->ls_lfp != lfp)
|
|
error = NFSERR_BADSTATEID;
|
|
|
|
/*
|
|
* If the lockowner stateid doesn't refer to the same file,
|
|
* I believe that is considered ok, since some clients will
|
|
* only create a single lockowner and use that for all locks
|
|
* on all files.
|
|
* For now, log it as a diagnostic, instead of considering it
|
|
* a BadStateid.
|
|
*/
|
|
if (error == 0 && (stp->ls_flags &
|
|
(NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 &&
|
|
getlckret == 0 && stp->ls_lfp != lfp) {
|
|
#ifdef DIAGNOSTIC
|
|
printf("Got a lock statid for different file open\n");
|
|
#endif
|
|
/*
|
|
error = NFSERR_BADSTATEID;
|
|
*/
|
|
}
|
|
|
|
if (error == 0) {
|
|
if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) {
|
|
/*
|
|
* If haslock set, we've already checked the seqid.
|
|
*/
|
|
if (!haslock) {
|
|
if (stp->ls_flags & NFSLCK_OPEN)
|
|
error = nfsrv_checkseqid(nd, new_stp->ls_seq,
|
|
stp->ls_openowner, new_stp->ls_op);
|
|
else
|
|
error = NFSERR_BADSTATEID;
|
|
}
|
|
if (!error)
|
|
nfsrv_getowner(&stp->ls_open, new_stp, &lckstp);
|
|
if (lckstp) {
|
|
/*
|
|
* For NFSv4.1 and NFSv4.2 allow an
|
|
* open_to_lock_owner when the lock_owner already
|
|
* exists. Just clear NFSLCK_OPENTOLOCK so that
|
|
* a new lock_owner will not be created.
|
|
* RFC7530 states that the error for NFSv4.0
|
|
* is NFS4ERR_BAD_SEQID.
|
|
*/
|
|
if ((nd->nd_flag & ND_NFSV41) != 0)
|
|
new_stp->ls_flags &= ~NFSLCK_OPENTOLOCK;
|
|
else
|
|
error = NFSERR_BADSEQID;
|
|
} else
|
|
lckstp = new_stp;
|
|
} else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) {
|
|
/*
|
|
* If haslock set, ditto above.
|
|
*/
|
|
if (!haslock) {
|
|
if (stp->ls_flags & NFSLCK_OPEN)
|
|
error = NFSERR_BADSTATEID;
|
|
else
|
|
error = nfsrv_checkseqid(nd, new_stp->ls_seq,
|
|
stp, new_stp->ls_op);
|
|
}
|
|
lckstp = stp;
|
|
} else {
|
|
lckstp = stp;
|
|
}
|
|
}
|
|
/*
|
|
* If the seqid part of the stateid isn't the same, return
|
|
* NFSERR_OLDSTATEID for cases other than I/O Ops.
|
|
* For I/O Ops, only return NFSERR_OLDSTATEID if
|
|
* nfsrv_returnoldstateid is set. (The consensus on the email
|
|
* list was that most clients would prefer to not receive
|
|
* NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that
|
|
* is what will happen, so I use the nfsrv_returnoldstateid to
|
|
* allow for either server configuration.)
|
|
*/
|
|
if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid &&
|
|
(((nd->nd_flag & ND_NFSV41) == 0 &&
|
|
(!(new_stp->ls_flags & NFSLCK_CHECK) ||
|
|
nfsrv_returnoldstateid)) ||
|
|
((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
new_stp->ls_stateid.seqid != 0)))
|
|
error = NFSERR_OLDSTATEID;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we can check for grace.
|
|
*/
|
|
if (!error)
|
|
error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
|
|
if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
|
|
nfsrv_checkstable(clp))
|
|
error = NFSERR_NOGRACE;
|
|
/*
|
|
* If we successfully Reclaimed state, note that.
|
|
*/
|
|
if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error)
|
|
nfsrv_markstable(clp);
|
|
|
|
/*
|
|
* At this point, either error == NFSERR_BADSTATEID or the
|
|
* seqid# has been updated, so we can return any error.
|
|
* If error == 0, there may be an error in:
|
|
* nd_repstat - Set by the calling function.
|
|
* reterr - Set above, if getting the nfslockfile structure
|
|
* or acquiring the local lock failed.
|
|
* (If both of these are set, nd_repstat should probably be
|
|
* returned, since that error was detected before this
|
|
* function call.)
|
|
*/
|
|
if (error != 0 || nd->nd_repstat != 0 || reterr != 0) {
|
|
if (error == 0) {
|
|
if (nd->nd_repstat != 0)
|
|
error = nd->nd_repstat;
|
|
else
|
|
error = reterr;
|
|
}
|
|
if (filestruct_locked != 0) {
|
|
/* Roll back local locks. */
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2");
|
|
vnode_unlocked = 1;
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Check the nfsrv_getlockfile return.
|
|
* Returned -1 if no structure found.
|
|
*/
|
|
if (getlckret == -1) {
|
|
error = NFSERR_EXPIRED;
|
|
/*
|
|
* Called from lockt, so no lock is OK.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_TEST) {
|
|
error = 0;
|
|
} else if (new_stp->ls_flags &
|
|
(NFSLCK_CHECK | NFSLCK_SETATTR)) {
|
|
/*
|
|
* Called to check for a lock, OK if the stateid is all
|
|
* 1s or all 0s, but there should be an nfsstate
|
|
* otherwise.
|
|
* (ie. If there is no open, I'll assume no share
|
|
* deny bits.)
|
|
*/
|
|
if (specialid)
|
|
error = 0;
|
|
else
|
|
error = NFSERR_BADSTATEID;
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict.
|
|
* For NFSLCK_CHECK, allow a read if write access is granted,
|
|
* but check for a deny. For NFSLCK_LOCK, require correct access,
|
|
* which implies a conflicting deny can't exist.
|
|
*/
|
|
if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) {
|
|
/*
|
|
* Four kinds of state id:
|
|
* - specialid (all 0s or all 1s), only for NFSLCK_CHECK
|
|
* - stateid for an open
|
|
* - stateid for a delegation
|
|
* - stateid for a lock owner
|
|
*/
|
|
if (!specialid) {
|
|
if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
|
|
delegation = 1;
|
|
mystp = stp;
|
|
nfsrv_delaydelegtimeout(stp);
|
|
} else if (stp->ls_flags & NFSLCK_OPEN) {
|
|
mystp = stp;
|
|
} else {
|
|
mystp = stp->ls_openstp;
|
|
}
|
|
/*
|
|
* If locking or checking, require correct access
|
|
* bit set.
|
|
*/
|
|
if (((new_stp->ls_flags & NFSLCK_LOCK) &&
|
|
!((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) &
|
|
mystp->ls_flags & NFSLCK_ACCESSBITS)) ||
|
|
((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) ==
|
|
(NFSLCK_CHECK | NFSLCK_READACCESS) &&
|
|
!(mystp->ls_flags & NFSLCK_READACCESS) &&
|
|
nfsrv_allowreadforwriteopen == 0) ||
|
|
((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) ==
|
|
(NFSLCK_CHECK | NFSLCK_WRITEACCESS) &&
|
|
!(mystp->ls_flags & NFSLCK_WRITEACCESS))) {
|
|
if (filestruct_locked != 0) {
|
|
/* Roll back local locks. */
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp,
|
|
"nfsrv_lockctrl3");
|
|
vnode_unlocked = 1;
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
error = NFSERR_OPENMODE;
|
|
goto out;
|
|
}
|
|
} else
|
|
mystp = NULL;
|
|
if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) {
|
|
/*
|
|
* Check for a conflicting deny bit.
|
|
*/
|
|
LIST_FOREACH(tstp, &lfp->lf_open, ls_file) {
|
|
if (tstp != mystp) {
|
|
bits = tstp->ls_flags;
|
|
bits >>= NFSLCK_SHIFT;
|
|
if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) {
|
|
KASSERT(vnode_unlocked == 0,
|
|
("nfsrv_lockctrl: vnode unlocked1"));
|
|
ret = nfsrv_clientconflict(tstp->ls_clp, &haslock,
|
|
vp, p);
|
|
if (ret == 1) {
|
|
/*
|
|
* nfsrv_clientconflict unlocks state
|
|
* when it returns non-zero.
|
|
*/
|
|
lckstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
if (ret == 0)
|
|
NFSUNLOCKSTATE();
|
|
if (ret == 2)
|
|
error = NFSERR_PERM;
|
|
else
|
|
error = NFSERR_OPENMODE;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We're outta here */
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For setattr, just get rid of all the Delegations for other clients.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_SETATTR) {
|
|
KASSERT(vnode_unlocked == 0,
|
|
("nfsrv_lockctrl: vnode unlocked2"));
|
|
ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p);
|
|
if (ret) {
|
|
/*
|
|
* nfsrv_cleandeleg() unlocks state when it
|
|
* returns non-zero.
|
|
*/
|
|
if (ret == -1) {
|
|
lckstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
error = ret;
|
|
goto out;
|
|
}
|
|
if (!(new_stp->ls_flags & NFSLCK_CHECK) ||
|
|
(LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) &&
|
|
LIST_EMPTY(&lfp->lf_deleg))) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for a conflicting delegation. If one is found, call
|
|
* nfsrv_delegconflict() to handle it. If the v4root lock hasn't
|
|
* been set yet, it will get the lock. Otherwise, it will recall
|
|
* the delegation. Then, we try try again...
|
|
* I currently believe the conflict algorithm to be:
|
|
* For Lock Ops (Lock/LockT/LockU)
|
|
* - there is a conflict iff a different client has a write delegation
|
|
* For Reading (Read Op)
|
|
* - there is a conflict iff a different client has a write delegation
|
|
* (the specialids are always a different client)
|
|
* For Writing (Write/Setattr of size)
|
|
* - there is a conflict if a different client has any delegation
|
|
* - there is a conflict if the same client has a read delegation
|
|
* (I don't understand why this isn't allowed, but that seems to be
|
|
* the current consensus?)
|
|
*/
|
|
tstp = LIST_FIRST(&lfp->lf_deleg);
|
|
while (tstp != LIST_END(&lfp->lf_deleg)) {
|
|
nstp = LIST_NEXT(tstp, ls_file);
|
|
if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))||
|
|
((new_stp->ls_flags & NFSLCK_CHECK) &&
|
|
(new_lop->lo_flags & NFSLCK_READ))) &&
|
|
clp != tstp->ls_clp &&
|
|
(tstp->ls_flags & NFSLCK_DELEGWRITE)) ||
|
|
((new_stp->ls_flags & NFSLCK_CHECK) &&
|
|
(new_lop->lo_flags & NFSLCK_WRITE) &&
|
|
(clp != tstp->ls_clp ||
|
|
(tstp->ls_flags & NFSLCK_DELEGREAD)))) {
|
|
ret = 0;
|
|
if (filestruct_locked != 0) {
|
|
/* Roll back local locks. */
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4");
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
NFSUNLOCKSTATE();
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
vnode_unlocked = 0;
|
|
if (VN_IS_DOOMED(vp))
|
|
ret = NFSERR_SERVERFAULT;
|
|
NFSLOCKSTATE();
|
|
}
|
|
if (ret == 0)
|
|
ret = nfsrv_delegconflict(tstp, &haslock, p, vp);
|
|
if (ret) {
|
|
/*
|
|
* nfsrv_delegconflict unlocks state when it
|
|
* returns non-zero, which it always does.
|
|
*/
|
|
if (other_lop) {
|
|
free(other_lop, M_NFSDLOCK);
|
|
other_lop = NULL;
|
|
}
|
|
if (ret == -1) {
|
|
lckstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
error = ret;
|
|
goto out;
|
|
}
|
|
/* Never gets here. */
|
|
}
|
|
tstp = nstp;
|
|
}
|
|
|
|
/*
|
|
* Handle the unlock case by calling nfsrv_updatelock().
|
|
* (Should I have done some access checking above for unlock? For now,
|
|
* just let it happen.)
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_UNLOCK) {
|
|
first = new_lop->lo_first;
|
|
end = new_lop->lo_end;
|
|
nfsrv_updatelock(stp, new_lopp, &other_lop, lfp);
|
|
stateidp->seqid = ++(stp->ls_stateid.seqid);
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
|
|
stateidp->seqid = stp->ls_stateid.seqid = 1;
|
|
stateidp->other[0] = stp->ls_stateid.other[0];
|
|
stateidp->other[1] = stp->ls_stateid.other[1];
|
|
stateidp->other[2] = stp->ls_stateid.other[2];
|
|
if (filestruct_locked != 0) {
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5");
|
|
vnode_unlocked = 1;
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
/* Update the local locks. */
|
|
nfsrv_localunlock(vp, lfp, first, end, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Search for a conflicting lock. A lock conflicts if:
|
|
* - the lock range overlaps and
|
|
* - at least one lock is a write lock and
|
|
* - it is not owned by the same lock owner
|
|
*/
|
|
if (!delegation) {
|
|
LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
|
|
if (new_lop->lo_end > lop->lo_first &&
|
|
new_lop->lo_first < lop->lo_end &&
|
|
(new_lop->lo_flags == NFSLCK_WRITE ||
|
|
lop->lo_flags == NFSLCK_WRITE) &&
|
|
lckstp != lop->lo_stp &&
|
|
(clp != lop->lo_stp->ls_clp ||
|
|
lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen ||
|
|
NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner,
|
|
lckstp->ls_ownerlen))) {
|
|
if (other_lop) {
|
|
free(other_lop, M_NFSDLOCK);
|
|
other_lop = NULL;
|
|
}
|
|
if (vnode_unlocked != 0)
|
|
ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
|
|
NULL, p);
|
|
else
|
|
ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock,
|
|
vp, p);
|
|
if (ret == 1) {
|
|
if (filestruct_locked != 0) {
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6");
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
/* Roll back local locks. */
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
NFSUNLOCKSTATE();
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
vnode_unlocked = 0;
|
|
if (VN_IS_DOOMED(vp)) {
|
|
error = NFSERR_SERVERFAULT;
|
|
goto out;
|
|
}
|
|
}
|
|
/*
|
|
* nfsrv_clientconflict() unlocks state when it
|
|
* returns non-zero.
|
|
*/
|
|
lckstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
/*
|
|
* Found a conflicting lock, so record the conflict and
|
|
* return the error.
|
|
*/
|
|
if (cfp != NULL && ret == 0) {
|
|
cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0];
|
|
cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1];
|
|
cfp->cl_first = lop->lo_first;
|
|
cfp->cl_end = lop->lo_end;
|
|
cfp->cl_flags = lop->lo_flags;
|
|
cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen;
|
|
NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner,
|
|
cfp->cl_ownerlen);
|
|
}
|
|
if (ret == 2)
|
|
error = NFSERR_PERM;
|
|
else if (new_stp->ls_flags & NFSLCK_RECLAIM)
|
|
error = NFSERR_RECLAIMCONFLICT;
|
|
else if (new_stp->ls_flags & NFSLCK_CHECK)
|
|
error = NFSERR_LOCKED;
|
|
else
|
|
error = NFSERR_DENIED;
|
|
if (filestruct_locked != 0 && ret == 0) {
|
|
/* Roll back local locks. */
|
|
NFSUNLOCKSTATE();
|
|
if (vnode_unlocked == 0) {
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7");
|
|
vnode_unlocked = 1;
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
}
|
|
if (ret == 0)
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We only get here if there was no lock that conflicted.
|
|
*/
|
|
if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We only get here when we are creating or modifying a lock.
|
|
* There are two variants:
|
|
* - exist_lock_owner where lock_owner exists
|
|
* - open_to_lock_owner with new lock_owner
|
|
*/
|
|
first = new_lop->lo_first;
|
|
end = new_lop->lo_end;
|
|
lock_flags = new_lop->lo_flags;
|
|
if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) {
|
|
nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp);
|
|
stateidp->seqid = ++(lckstp->ls_stateid.seqid);
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
|
|
stateidp->seqid = lckstp->ls_stateid.seqid = 1;
|
|
stateidp->other[0] = lckstp->ls_stateid.other[0];
|
|
stateidp->other[1] = lckstp->ls_stateid.other[1];
|
|
stateidp->other[2] = lckstp->ls_stateid.other[2];
|
|
} else {
|
|
/*
|
|
* The new open_to_lock_owner case.
|
|
* Link the new nfsstate into the lists.
|
|
*/
|
|
new_stp->ls_seq = new_stp->ls_opentolockseq;
|
|
nfsrvd_refcache(new_stp->ls_op);
|
|
stateidp->seqid = new_stp->ls_stateid.seqid = 1;
|
|
stateidp->other[0] = new_stp->ls_stateid.other[0] =
|
|
clp->lc_clientid.lval[0];
|
|
stateidp->other[1] = new_stp->ls_stateid.other[1] =
|
|
clp->lc_clientid.lval[1];
|
|
stateidp->other[2] = new_stp->ls_stateid.other[2] =
|
|
nfsrv_nextstateindex(clp);
|
|
new_stp->ls_clp = clp;
|
|
LIST_INIT(&new_stp->ls_lock);
|
|
new_stp->ls_openstp = stp;
|
|
new_stp->ls_lfp = lfp;
|
|
nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp,
|
|
lfp);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid),
|
|
new_stp, ls_hash);
|
|
LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list);
|
|
*new_lopp = NULL;
|
|
*new_stpp = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvlockowners++;
|
|
nfsrv_openpluslock++;
|
|
}
|
|
if (filestruct_locked != 0) {
|
|
NFSUNLOCKSTATE();
|
|
nfsrv_locallock_commit(lfp, lock_flags, first, end);
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
|
|
out:
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
if (vnode_unlocked != 0) {
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (error == 0 && VN_IS_DOOMED(vp))
|
|
error = NFSERR_SERVERFAULT;
|
|
}
|
|
if (other_lop)
|
|
free(other_lop, M_NFSDLOCK);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check for state errors for Open.
|
|
* repstat is passed back out as an error if more critical errors
|
|
* are not detected.
|
|
*/
|
|
int
|
|
nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp,
|
|
struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd,
|
|
NFSPROC_T *p, int repstat)
|
|
{
|
|
struct nfsstate *stp, *nstp;
|
|
struct nfsclient *clp;
|
|
struct nfsstate *ownerstp;
|
|
struct nfslockfile *lfp, *new_lfp;
|
|
int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0;
|
|
|
|
if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
|
|
readonly = 1;
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
*/
|
|
error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
|
|
&new_stp->ls_stateid, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* Check for state resource limit exceeded.
|
|
* Technically this should be SMP protected, but the worst
|
|
* case error is "out by one or two" on the count when it
|
|
* returns NFSERR_RESOURCE and the limit is just a rather
|
|
* arbitrary high water mark, so no harm is done.
|
|
*/
|
|
if (nfsrv_openpluslock > nfsrv_v4statelimit) {
|
|
error = NFSERR_RESOURCE;
|
|
goto out;
|
|
}
|
|
|
|
tryagain:
|
|
new_lfp = malloc(sizeof (struct nfslockfile),
|
|
M_NFSDLOCKFILE, M_WAITOK);
|
|
if (vp)
|
|
getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
|
|
NULL, p);
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Get the nfsclient structure.
|
|
*/
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
|
|
/*
|
|
* Look up the open owner. See if it needs confirmation and
|
|
* check the seq#, as required.
|
|
*/
|
|
if (!error)
|
|
nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
|
|
|
|
if (!error && ownerstp) {
|
|
error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp,
|
|
new_stp->ls_op);
|
|
/*
|
|
* If the OpenOwner hasn't been confirmed, assume the
|
|
* old one was a replay and this one is ok.
|
|
* See: RFC3530 Sec. 14.2.18.
|
|
*/
|
|
if (error == NFSERR_BADSEQID &&
|
|
(ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM))
|
|
error = 0;
|
|
}
|
|
|
|
/*
|
|
* Check for grace.
|
|
*/
|
|
if (!error)
|
|
error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags);
|
|
if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error &&
|
|
nfsrv_checkstable(clp))
|
|
error = NFSERR_NOGRACE;
|
|
|
|
/*
|
|
* If none of the above errors occurred, let repstat be
|
|
* returned.
|
|
*/
|
|
if (repstat && !error)
|
|
error = repstat;
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
free(new_lfp, M_NFSDLOCKFILE);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If vp == NULL, the file doesn't exist yet, so return ok.
|
|
* (This always happens on the first pass, so haslock must be 0.)
|
|
*/
|
|
if (vp == NULL) {
|
|
NFSUNLOCKSTATE();
|
|
free(new_lfp, M_NFSDLOCKFILE);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Get the structure for the underlying file.
|
|
*/
|
|
if (getfhret)
|
|
error = getfhret;
|
|
else
|
|
error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
|
|
NULL, 0);
|
|
if (new_lfp)
|
|
free(new_lfp, M_NFSDLOCKFILE);
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Search for a conflicting open/share.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
|
|
/*
|
|
* For Delegate_Cur, search for the matching Delegation,
|
|
* which indicates no conflict.
|
|
* An old delegation should have been recovered by the
|
|
* client doing a Claim_DELEGATE_Prev, so I won't let
|
|
* it match and return NFSERR_EXPIRED. Should I let it
|
|
* match?
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
|
|
if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
|
|
(((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
stateidp->seqid == 0) ||
|
|
stateidp->seqid == stp->ls_stateid.seqid) &&
|
|
!NFSBCMP(stateidp->other, stp->ls_stateid.other,
|
|
NFSX_STATEIDOTHER))
|
|
break;
|
|
}
|
|
if (stp == LIST_END(&lfp->lf_deleg) ||
|
|
((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
|
|
(stp->ls_flags & NFSLCK_DELEGREAD))) {
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
error = NFSERR_EXPIRED;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for access/deny bit conflicts. I check for the same
|
|
* owner as well, in case the client didn't bother.
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
|
|
if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) &&
|
|
(((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
|
|
((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
|
|
((stp->ls_flags & NFSLCK_ACCESSBITS) &
|
|
((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){
|
|
ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
|
|
if (ret == 1) {
|
|
/*
|
|
* nfsrv_clientconflict() unlocks
|
|
* state when it returns non-zero.
|
|
*/
|
|
goto tryagain;
|
|
}
|
|
if (ret == 2)
|
|
error = NFSERR_PERM;
|
|
else if (new_stp->ls_flags & NFSLCK_RECLAIM)
|
|
error = NFSERR_RECLAIMCONFLICT;
|
|
else
|
|
error = NFSERR_SHAREDENIED;
|
|
if (ret == 0)
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for a conflicting delegation. If one is found, call
|
|
* nfsrv_delegconflict() to handle it. If the v4root lock hasn't
|
|
* been set yet, it will get the lock. Otherwise, it will recall
|
|
* the delegation. Then, we try try again...
|
|
* (If NFSLCK_DELEGCUR is set, it has a delegation, so there
|
|
* isn't a conflict.)
|
|
* I currently believe the conflict algorithm to be:
|
|
* For Open with Read Access and Deny None
|
|
* - there is a conflict iff a different client has a write delegation
|
|
* For Open with other Write Access or any Deny except None
|
|
* - there is a conflict if a different client has any delegation
|
|
* - there is a conflict if the same client has a read delegation
|
|
* (The current consensus is that this last case should be
|
|
* considered a conflict since the client with a read delegation
|
|
* could have done an Open with ReadAccess and WriteDeny
|
|
* locally and then not have checked for the WriteDeny.)
|
|
* Don't check for a Reclaim, since that will be dealt with
|
|
* by nfsrv_openctrl().
|
|
*/
|
|
if (!(new_stp->ls_flags &
|
|
(NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) {
|
|
stp = LIST_FIRST(&lfp->lf_deleg);
|
|
while (stp != LIST_END(&lfp->lf_deleg)) {
|
|
nstp = LIST_NEXT(stp, ls_file);
|
|
if ((readonly && stp->ls_clp != clp &&
|
|
(stp->ls_flags & NFSLCK_DELEGWRITE)) ||
|
|
(!readonly && (stp->ls_clp != clp ||
|
|
(stp->ls_flags & NFSLCK_DELEGREAD)))) {
|
|
ret = nfsrv_delegconflict(stp, &haslock, p, vp);
|
|
if (ret) {
|
|
/*
|
|
* nfsrv_delegconflict() unlocks state
|
|
* when it returns non-zero.
|
|
*/
|
|
if (ret == -1)
|
|
goto tryagain;
|
|
error = ret;
|
|
goto out;
|
|
}
|
|
}
|
|
stp = nstp;
|
|
}
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Open control function to create/update open state for an open.
|
|
*/
|
|
int
|
|
nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp,
|
|
struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp,
|
|
nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp,
|
|
NFSPROC_T *p, u_quad_t filerev)
|
|
{
|
|
struct nfsstate *new_stp = *new_stpp;
|
|
struct nfsstate *stp, *nstp;
|
|
struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg;
|
|
struct nfslockfile *lfp, *new_lfp;
|
|
struct nfsclient *clp;
|
|
int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1;
|
|
int readonly = 0, cbret = 1, getfhret = 0;
|
|
int gotstate = 0, len = 0;
|
|
u_char *clidp = NULL;
|
|
|
|
if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS)
|
|
readonly = 1;
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
* (Paranoia, should have been detected by nfsrv_opencheck().)
|
|
* If an error does show up, return NFSERR_EXPIRED, since the
|
|
* the seqid# has already been incremented.
|
|
*/
|
|
error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
|
|
&new_stp->ls_stateid, 0);
|
|
if (error) {
|
|
printf("Nfsd: openctrl unexpected restart err=%d\n",
|
|
error);
|
|
error = NFSERR_EXPIRED;
|
|
goto out;
|
|
}
|
|
|
|
clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
|
|
tryagain:
|
|
new_lfp = malloc(sizeof (struct nfslockfile),
|
|
M_NFSDLOCKFILE, M_WAITOK);
|
|
new_open = malloc(sizeof (struct nfsstate),
|
|
M_NFSDSTATE, M_WAITOK);
|
|
new_deleg = malloc(sizeof (struct nfsstate),
|
|
M_NFSDSTATE, M_WAITOK);
|
|
getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp,
|
|
NULL, p);
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Get the client structure. Since the linked lists could be changed
|
|
* by other nfsd processes if this process does a tsleep(), one of
|
|
* two things must be done.
|
|
* 1 - don't tsleep()
|
|
* or
|
|
* 2 - get the nfsv4_lock() { indicated by haslock == 1 }
|
|
* before using the lists, since this lock stops the other
|
|
* nfsd. This should only be used for rare cases, since it
|
|
* essentially single threads the nfsd.
|
|
* At this time, it is only done for cases where the stable
|
|
* storage file must be written prior to completion of state
|
|
* expiration.
|
|
*/
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) &&
|
|
clp->lc_program) {
|
|
/*
|
|
* This happens on the first open for a client
|
|
* that supports callbacks.
|
|
*/
|
|
NFSUNLOCKSTATE();
|
|
/*
|
|
* Although nfsrv_docallback() will sleep, clp won't
|
|
* go away, since they are only removed when the
|
|
* nfsv4_lock() has blocked the nfsd threads. The
|
|
* fields in clp can change, but having multiple
|
|
* threads do this Null callback RPC should be
|
|
* harmless.
|
|
*/
|
|
cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL,
|
|
NULL, 0, NULL, NULL, NULL, 0, p);
|
|
NFSLOCKSTATE();
|
|
clp->lc_flags &= ~LCL_NEEDSCBNULL;
|
|
if (!cbret)
|
|
clp->lc_flags |= LCL_CALLBACKSON;
|
|
}
|
|
|
|
/*
|
|
* Look up the open owner. See if it needs confirmation and
|
|
* check the seq#, as required.
|
|
*/
|
|
if (!error)
|
|
nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp);
|
|
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
printf("Nfsd: openctrl unexpected state err=%d\n",
|
|
error);
|
|
free(new_lfp, M_NFSDLOCKFILE);
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
error = NFSERR_EXPIRED;
|
|
goto out;
|
|
}
|
|
|
|
if (new_stp->ls_flags & NFSLCK_RECLAIM)
|
|
nfsrv_markstable(clp);
|
|
|
|
/*
|
|
* Get the structure for the underlying file.
|
|
*/
|
|
if (getfhret)
|
|
error = getfhret;
|
|
else
|
|
error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp,
|
|
NULL, 0);
|
|
if (new_lfp)
|
|
free(new_lfp, M_NFSDLOCKFILE);
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
printf("Nfsd openctrl unexpected getlockfile err=%d\n",
|
|
error);
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Search for a conflicting open/share.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_DELEGCUR) {
|
|
/*
|
|
* For Delegate_Cur, search for the matching Delegation,
|
|
* which indicates no conflict.
|
|
* An old delegation should have been recovered by the
|
|
* client doing a Claim_DELEGATE_Prev, so I won't let
|
|
* it match and return NFSERR_EXPIRED. Should I let it
|
|
* match?
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
|
|
if (!(stp->ls_flags & NFSLCK_OLDDELEG) &&
|
|
(((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
stateidp->seqid == 0) ||
|
|
stateidp->seqid == stp->ls_stateid.seqid) &&
|
|
!NFSBCMP(stateidp->other, stp->ls_stateid.other,
|
|
NFSX_STATEIDOTHER))
|
|
break;
|
|
}
|
|
if (stp == LIST_END(&lfp->lf_deleg) ||
|
|
((new_stp->ls_flags & NFSLCK_WRITEACCESS) &&
|
|
(stp->ls_flags & NFSLCK_DELEGREAD))) {
|
|
NFSUNLOCKSTATE();
|
|
printf("Nfsd openctrl unexpected expiry\n");
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
error = NFSERR_EXPIRED;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Don't issue a Delegation, since one already exists and
|
|
* delay delegation timeout, as required.
|
|
*/
|
|
delegate = 0;
|
|
nfsrv_delaydelegtimeout(stp);
|
|
}
|
|
|
|
/*
|
|
* Check for access/deny bit conflicts. I also check for the
|
|
* same owner, since the client might not have bothered to check.
|
|
* Also, note an open for the same file and owner, if found,
|
|
* which is all we do here for Delegate_Cur, since conflict
|
|
* checking is already done.
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
|
|
if (ownerstp && stp->ls_openowner == ownerstp)
|
|
openstp = stp;
|
|
if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) {
|
|
/*
|
|
* If another client has the file open, the only
|
|
* delegation that can be issued is a Read delegation
|
|
* and only if it is a Read open with Deny none.
|
|
*/
|
|
if (clp != stp->ls_clp) {
|
|
if ((stp->ls_flags & NFSLCK_SHAREBITS) ==
|
|
NFSLCK_READACCESS)
|
|
writedeleg = 0;
|
|
else
|
|
delegate = 0;
|
|
}
|
|
if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) &
|
|
((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))||
|
|
((stp->ls_flags & NFSLCK_ACCESSBITS) &
|
|
((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){
|
|
ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p);
|
|
if (ret == 1) {
|
|
/*
|
|
* nfsrv_clientconflict() unlocks state
|
|
* when it returns non-zero.
|
|
*/
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
openstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
if (ret == 2)
|
|
error = NFSERR_PERM;
|
|
else if (new_stp->ls_flags & NFSLCK_RECLAIM)
|
|
error = NFSERR_RECLAIMCONFLICT;
|
|
else
|
|
error = NFSERR_SHAREDENIED;
|
|
if (ret == 0)
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
printf("nfsd openctrl unexpected client cnfl\n");
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for a conflicting delegation. If one is found, call
|
|
* nfsrv_delegconflict() to handle it. If the v4root lock hasn't
|
|
* been set yet, it will get the lock. Otherwise, it will recall
|
|
* the delegation. Then, we try try again...
|
|
* (If NFSLCK_DELEGCUR is set, it has a delegation, so there
|
|
* isn't a conflict.)
|
|
* I currently believe the conflict algorithm to be:
|
|
* For Open with Read Access and Deny None
|
|
* - there is a conflict iff a different client has a write delegation
|
|
* For Open with other Write Access or any Deny except None
|
|
* - there is a conflict if a different client has any delegation
|
|
* - there is a conflict if the same client has a read delegation
|
|
* (The current consensus is that this last case should be
|
|
* considered a conflict since the client with a read delegation
|
|
* could have done an Open with ReadAccess and WriteDeny
|
|
* locally and then not have checked for the WriteDeny.)
|
|
*/
|
|
if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) {
|
|
stp = LIST_FIRST(&lfp->lf_deleg);
|
|
while (stp != LIST_END(&lfp->lf_deleg)) {
|
|
nstp = LIST_NEXT(stp, ls_file);
|
|
if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD))
|
|
writedeleg = 0;
|
|
else
|
|
delegate = 0;
|
|
if ((readonly && stp->ls_clp != clp &&
|
|
(stp->ls_flags & NFSLCK_DELEGWRITE)) ||
|
|
(!readonly && (stp->ls_clp != clp ||
|
|
(stp->ls_flags & NFSLCK_DELEGREAD)))) {
|
|
if (new_stp->ls_flags & NFSLCK_RECLAIM) {
|
|
delegate = 2;
|
|
} else {
|
|
ret = nfsrv_delegconflict(stp, &haslock, p, vp);
|
|
if (ret) {
|
|
/*
|
|
* nfsrv_delegconflict() unlocks state
|
|
* when it returns non-zero.
|
|
*/
|
|
printf("Nfsd openctrl unexpected deleg cnfl\n");
|
|
free(new_open, M_NFSDSTATE);
|
|
free(new_deleg, M_NFSDSTATE);
|
|
if (ret == -1) {
|
|
openstp = NULL;
|
|
goto tryagain;
|
|
}
|
|
error = ret;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
stp = nstp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We only get here if there was no open that conflicted.
|
|
* If an open for the owner exists, or in the access/deny bits.
|
|
* Otherwise it is a new open. If the open_owner hasn't been
|
|
* confirmed, replace the open with the new one needing confirmation,
|
|
* otherwise add the open.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_DELEGPREV) {
|
|
/*
|
|
* Handle NFSLCK_DELEGPREV by searching the old delegations for
|
|
* a match. If found, just move the old delegation to the current
|
|
* delegation list and issue open. If not found, return
|
|
* NFSERR_EXPIRED.
|
|
*/
|
|
LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) {
|
|
if (stp->ls_lfp == lfp) {
|
|
/* Found it */
|
|
if (stp->ls_clp != clp)
|
|
panic("olddeleg clp");
|
|
LIST_REMOVE(stp, ls_list);
|
|
LIST_REMOVE(stp, ls_hash);
|
|
stp->ls_flags &= ~NFSLCK_OLDDELEG;
|
|
stp->ls_stateid.seqid = delegstateidp->seqid = 1;
|
|
stp->ls_stateid.other[0] = delegstateidp->other[0] =
|
|
clp->lc_clientid.lval[0];
|
|
stp->ls_stateid.other[1] = delegstateidp->other[1] =
|
|
clp->lc_clientid.lval[1];
|
|
stp->ls_stateid.other[2] = delegstateidp->other[2] =
|
|
nfsrv_nextstateindex(clp);
|
|
stp->ls_compref = nd->nd_compref;
|
|
LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp,
|
|
stp->ls_stateid), stp, ls_hash);
|
|
if (stp->ls_flags & NFSLCK_DELEGWRITE)
|
|
*rflagsp |= NFSV4OPEN_WRITEDELEGATE;
|
|
else
|
|
*rflagsp |= NFSV4OPEN_READDELEGATE;
|
|
clp->lc_delegtime = NFSD_MONOSEC +
|
|
nfsrv_lease + NFSRV_LEASEDELTA;
|
|
|
|
/*
|
|
* Now, do the associated open.
|
|
*/
|
|
new_open->ls_stateid.seqid = 1;
|
|
new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
|
|
new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
|
|
new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
|
|
new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)|
|
|
NFSLCK_OPEN;
|
|
if (stp->ls_flags & NFSLCK_DELEGWRITE)
|
|
new_open->ls_flags |= (NFSLCK_READACCESS |
|
|
NFSLCK_WRITEACCESS);
|
|
else
|
|
new_open->ls_flags |= NFSLCK_READACCESS;
|
|
new_open->ls_uid = new_stp->ls_uid;
|
|
new_open->ls_lfp = lfp;
|
|
new_open->ls_clp = clp;
|
|
LIST_INIT(&new_open->ls_open);
|
|
LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
|
|
new_open, ls_hash);
|
|
/*
|
|
* and handle the open owner
|
|
*/
|
|
if (ownerstp) {
|
|
new_open->ls_openowner = ownerstp;
|
|
LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list);
|
|
} else {
|
|
new_open->ls_openowner = new_stp;
|
|
new_stp->ls_flags = 0;
|
|
nfsrvd_refcache(new_stp->ls_op);
|
|
new_stp->ls_noopens = 0;
|
|
LIST_INIT(&new_stp->ls_open);
|
|
LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
|
|
LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
|
|
*new_stpp = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopenowners++;
|
|
nfsrv_openpluslock++;
|
|
}
|
|
openstp = new_open;
|
|
new_open = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopens++;
|
|
nfsrv_openpluslock++;
|
|
break;
|
|
}
|
|
}
|
|
if (stp == LIST_END(&clp->lc_olddeleg))
|
|
error = NFSERR_EXPIRED;
|
|
} else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) {
|
|
/*
|
|
* Scan to see that no delegation for this client and file
|
|
* doesn't already exist.
|
|
* There also shouldn't yet be an Open for this file and
|
|
* openowner.
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
|
|
if (stp->ls_clp == clp)
|
|
break;
|
|
}
|
|
if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) {
|
|
/*
|
|
* This is the Claim_Previous case with a delegation
|
|
* type != Delegate_None.
|
|
*/
|
|
/*
|
|
* First, add the delegation. (Although we must issue the
|
|
* delegation, we can also ask for an immediate return.)
|
|
*/
|
|
new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
|
|
new_deleg->ls_stateid.other[0] = delegstateidp->other[0] =
|
|
clp->lc_clientid.lval[0];
|
|
new_deleg->ls_stateid.other[1] = delegstateidp->other[1] =
|
|
clp->lc_clientid.lval[1];
|
|
new_deleg->ls_stateid.other[2] = delegstateidp->other[2] =
|
|
nfsrv_nextstateindex(clp);
|
|
if (new_stp->ls_flags & NFSLCK_DELEGWRITE) {
|
|
new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
|
|
NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
|
|
*rflagsp |= NFSV4OPEN_WRITEDELEGATE;
|
|
nfsrv_writedelegcnt++;
|
|
} else {
|
|
new_deleg->ls_flags = (NFSLCK_DELEGREAD |
|
|
NFSLCK_READACCESS);
|
|
*rflagsp |= NFSV4OPEN_READDELEGATE;
|
|
}
|
|
new_deleg->ls_uid = new_stp->ls_uid;
|
|
new_deleg->ls_lfp = lfp;
|
|
new_deleg->ls_clp = clp;
|
|
new_deleg->ls_filerev = filerev;
|
|
new_deleg->ls_compref = nd->nd_compref;
|
|
new_deleg->ls_lastrecall = 0;
|
|
LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp,
|
|
new_deleg->ls_stateid), new_deleg, ls_hash);
|
|
LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
|
|
new_deleg = NULL;
|
|
if (delegate == 2 || nfsrv_issuedelegs == 0 ||
|
|
(clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
|
|
LCL_CALLBACKSON ||
|
|
NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) ||
|
|
!NFSVNO_DELEGOK(vp))
|
|
*rflagsp |= NFSV4OPEN_RECALL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvdelegates++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_delegatecnt++;
|
|
|
|
/*
|
|
* Now, do the associated open.
|
|
*/
|
|
new_open->ls_stateid.seqid = 1;
|
|
new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
|
|
new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
|
|
new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
|
|
new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) |
|
|
NFSLCK_OPEN;
|
|
if (new_stp->ls_flags & NFSLCK_DELEGWRITE)
|
|
new_open->ls_flags |= (NFSLCK_READACCESS |
|
|
NFSLCK_WRITEACCESS);
|
|
else
|
|
new_open->ls_flags |= NFSLCK_READACCESS;
|
|
new_open->ls_uid = new_stp->ls_uid;
|
|
new_open->ls_lfp = lfp;
|
|
new_open->ls_clp = clp;
|
|
LIST_INIT(&new_open->ls_open);
|
|
LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
|
|
new_open, ls_hash);
|
|
/*
|
|
* and handle the open owner
|
|
*/
|
|
if (ownerstp) {
|
|
new_open->ls_openowner = ownerstp;
|
|
LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
|
|
} else {
|
|
new_open->ls_openowner = new_stp;
|
|
new_stp->ls_flags = 0;
|
|
nfsrvd_refcache(new_stp->ls_op);
|
|
new_stp->ls_noopens = 0;
|
|
LIST_INIT(&new_stp->ls_open);
|
|
LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
|
|
LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
|
|
*new_stpp = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopenowners++;
|
|
nfsrv_openpluslock++;
|
|
}
|
|
openstp = new_open;
|
|
new_open = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopens++;
|
|
nfsrv_openpluslock++;
|
|
} else {
|
|
error = NFSERR_RECLAIMCONFLICT;
|
|
}
|
|
} else if (ownerstp) {
|
|
if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) {
|
|
/* Replace the open */
|
|
if (ownerstp->ls_op)
|
|
nfsrvd_derefcache(ownerstp->ls_op);
|
|
ownerstp->ls_op = new_stp->ls_op;
|
|
nfsrvd_refcache(ownerstp->ls_op);
|
|
ownerstp->ls_seq = new_stp->ls_seq;
|
|
*rflagsp |= NFSV4OPEN_RESULTCONFIRM;
|
|
stp = LIST_FIRST(&ownerstp->ls_open);
|
|
stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
|
|
NFSLCK_OPEN;
|
|
stp->ls_stateid.seqid = 1;
|
|
stp->ls_uid = new_stp->ls_uid;
|
|
if (lfp != stp->ls_lfp) {
|
|
LIST_REMOVE(stp, ls_file);
|
|
LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file);
|
|
stp->ls_lfp = lfp;
|
|
}
|
|
openstp = stp;
|
|
} else if (openstp) {
|
|
openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS);
|
|
openstp->ls_stateid.seqid++;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
openstp->ls_stateid.seqid == 0)
|
|
openstp->ls_stateid.seqid = 1;
|
|
|
|
/*
|
|
* This is where we can choose to issue a delegation.
|
|
*/
|
|
if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
|
|
*rflagsp |= NFSV4OPEN_WDNOTWANTED;
|
|
else if (nfsrv_issuedelegs == 0)
|
|
*rflagsp |= NFSV4OPEN_WDSUPPFTYPE;
|
|
else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
|
|
*rflagsp |= NFSV4OPEN_WDRESOURCE;
|
|
else if (delegate == 0 || writedeleg == 0 ||
|
|
NFSVNO_EXRDONLY(exp) || (readonly != 0 &&
|
|
nfsrv_writedelegifpos == 0) ||
|
|
!NFSVNO_DELEGOK(vp) ||
|
|
(new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 ||
|
|
(clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
|
|
LCL_CALLBACKSON)
|
|
*rflagsp |= NFSV4OPEN_WDCONTENTION;
|
|
else {
|
|
new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
|
|
new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
|
|
= clp->lc_clientid.lval[0];
|
|
new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
|
|
= clp->lc_clientid.lval[1];
|
|
new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
|
|
= nfsrv_nextstateindex(clp);
|
|
new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
|
|
NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
|
|
*rflagsp |= NFSV4OPEN_WRITEDELEGATE;
|
|
new_deleg->ls_uid = new_stp->ls_uid;
|
|
new_deleg->ls_lfp = lfp;
|
|
new_deleg->ls_clp = clp;
|
|
new_deleg->ls_filerev = filerev;
|
|
new_deleg->ls_compref = nd->nd_compref;
|
|
new_deleg->ls_lastrecall = 0;
|
|
nfsrv_writedelegcnt++;
|
|
LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp,
|
|
new_deleg->ls_stateid), new_deleg, ls_hash);
|
|
LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
|
|
new_deleg = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvdelegates++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_delegatecnt++;
|
|
}
|
|
} else {
|
|
new_open->ls_stateid.seqid = 1;
|
|
new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
|
|
new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
|
|
new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
|
|
new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)|
|
|
NFSLCK_OPEN;
|
|
new_open->ls_uid = new_stp->ls_uid;
|
|
new_open->ls_openowner = ownerstp;
|
|
new_open->ls_lfp = lfp;
|
|
new_open->ls_clp = clp;
|
|
LIST_INIT(&new_open->ls_open);
|
|
LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
|
|
LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
|
|
new_open, ls_hash);
|
|
openstp = new_open;
|
|
new_open = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopens++;
|
|
nfsrv_openpluslock++;
|
|
|
|
/*
|
|
* This is where we can choose to issue a delegation.
|
|
*/
|
|
if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0)
|
|
*rflagsp |= NFSV4OPEN_WDNOTWANTED;
|
|
else if (nfsrv_issuedelegs == 0)
|
|
*rflagsp |= NFSV4OPEN_WDSUPPFTYPE;
|
|
else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt))
|
|
*rflagsp |= NFSV4OPEN_WDRESOURCE;
|
|
else if (delegate == 0 || (writedeleg == 0 &&
|
|
readonly == 0) || !NFSVNO_DELEGOK(vp) ||
|
|
(clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) !=
|
|
LCL_CALLBACKSON)
|
|
*rflagsp |= NFSV4OPEN_WDCONTENTION;
|
|
else {
|
|
new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1;
|
|
new_deleg->ls_stateid.other[0] = delegstateidp->other[0]
|
|
= clp->lc_clientid.lval[0];
|
|
new_deleg->ls_stateid.other[1] = delegstateidp->other[1]
|
|
= clp->lc_clientid.lval[1];
|
|
new_deleg->ls_stateid.other[2] = delegstateidp->other[2]
|
|
= nfsrv_nextstateindex(clp);
|
|
if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
|
|
(nfsrv_writedelegifpos || !readonly) &&
|
|
(new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) {
|
|
new_deleg->ls_flags = (NFSLCK_DELEGWRITE |
|
|
NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
|
|
*rflagsp |= NFSV4OPEN_WRITEDELEGATE;
|
|
nfsrv_writedelegcnt++;
|
|
} else {
|
|
new_deleg->ls_flags = (NFSLCK_DELEGREAD |
|
|
NFSLCK_READACCESS);
|
|
*rflagsp |= NFSV4OPEN_READDELEGATE;
|
|
}
|
|
new_deleg->ls_uid = new_stp->ls_uid;
|
|
new_deleg->ls_lfp = lfp;
|
|
new_deleg->ls_clp = clp;
|
|
new_deleg->ls_filerev = filerev;
|
|
new_deleg->ls_compref = nd->nd_compref;
|
|
new_deleg->ls_lastrecall = 0;
|
|
LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp,
|
|
new_deleg->ls_stateid), new_deleg, ls_hash);
|
|
LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list);
|
|
new_deleg = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvdelegates++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_delegatecnt++;
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* New owner case. Start the open_owner sequence with a
|
|
* Needs confirmation (unless a reclaim) and hang the
|
|
* new open off it.
|
|
*/
|
|
new_open->ls_stateid.seqid = 1;
|
|
new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0];
|
|
new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1];
|
|
new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp);
|
|
new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) |
|
|
NFSLCK_OPEN;
|
|
new_open->ls_uid = new_stp->ls_uid;
|
|
LIST_INIT(&new_open->ls_open);
|
|
new_open->ls_openowner = new_stp;
|
|
new_open->ls_lfp = lfp;
|
|
new_open->ls_clp = clp;
|
|
LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file);
|
|
if (new_stp->ls_flags & NFSLCK_RECLAIM) {
|
|
new_stp->ls_flags = 0;
|
|
} else if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
/* NFSv4.1 never needs confirmation. */
|
|
new_stp->ls_flags = 0;
|
|
|
|
/*
|
|
* This is where we can choose to issue a delegation.
|
|
*/
|
|
if (delegate && nfsrv_issuedelegs &&
|
|
(writedeleg || readonly) &&
|
|
(clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) ==
|
|
LCL_CALLBACKSON &&
|
|
!NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) &&
|
|
NFSVNO_DELEGOK(vp) &&
|
|
((nd->nd_flag & ND_NFSV41) == 0 ||
|
|
(new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) {
|
|
new_deleg->ls_stateid.seqid =
|
|
delegstateidp->seqid = 1;
|
|
new_deleg->ls_stateid.other[0] =
|
|
delegstateidp->other[0]
|
|
= clp->lc_clientid.lval[0];
|
|
new_deleg->ls_stateid.other[1] =
|
|
delegstateidp->other[1]
|
|
= clp->lc_clientid.lval[1];
|
|
new_deleg->ls_stateid.other[2] =
|
|
delegstateidp->other[2]
|
|
= nfsrv_nextstateindex(clp);
|
|
if (writedeleg && !NFSVNO_EXRDONLY(exp) &&
|
|
(nfsrv_writedelegifpos || !readonly) &&
|
|
((nd->nd_flag & ND_NFSV41) == 0 ||
|
|
(new_stp->ls_flags & NFSLCK_WANTRDELEG) ==
|
|
0)) {
|
|
new_deleg->ls_flags =
|
|
(NFSLCK_DELEGWRITE |
|
|
NFSLCK_READACCESS |
|
|
NFSLCK_WRITEACCESS);
|
|
*rflagsp |= NFSV4OPEN_WRITEDELEGATE;
|
|
nfsrv_writedelegcnt++;
|
|
} else {
|
|
new_deleg->ls_flags =
|
|
(NFSLCK_DELEGREAD |
|
|
NFSLCK_READACCESS);
|
|
*rflagsp |= NFSV4OPEN_READDELEGATE;
|
|
}
|
|
new_deleg->ls_uid = new_stp->ls_uid;
|
|
new_deleg->ls_lfp = lfp;
|
|
new_deleg->ls_clp = clp;
|
|
new_deleg->ls_filerev = filerev;
|
|
new_deleg->ls_compref = nd->nd_compref;
|
|
new_deleg->ls_lastrecall = 0;
|
|
LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg,
|
|
ls_file);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp,
|
|
new_deleg->ls_stateid), new_deleg, ls_hash);
|
|
LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg,
|
|
ls_list);
|
|
new_deleg = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvdelegates++;
|
|
nfsrv_openpluslock++;
|
|
nfsrv_delegatecnt++;
|
|
}
|
|
/*
|
|
* Since NFSv4.1 never does an OpenConfirm, the first
|
|
* open state will be acquired here.
|
|
*/
|
|
if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
|
|
clp->lc_flags |= LCL_STAMPEDSTABLE;
|
|
len = clp->lc_idlen;
|
|
NFSBCOPY(clp->lc_id, clidp, len);
|
|
gotstate = 1;
|
|
}
|
|
} else {
|
|
*rflagsp |= NFSV4OPEN_RESULTCONFIRM;
|
|
new_stp->ls_flags = NFSLCK_NEEDSCONFIRM;
|
|
}
|
|
nfsrvd_refcache(new_stp->ls_op);
|
|
new_stp->ls_noopens = 0;
|
|
LIST_INIT(&new_stp->ls_open);
|
|
LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list);
|
|
LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list);
|
|
LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid),
|
|
new_open, ls_hash);
|
|
openstp = new_open;
|
|
new_open = NULL;
|
|
*new_stpp = NULL;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopens++;
|
|
nfsrv_openpluslock++;
|
|
NFSD_VNET(nfsstatsv1_p)->srvopenowners++;
|
|
nfsrv_openpluslock++;
|
|
}
|
|
if (!error) {
|
|
stateidp->seqid = openstp->ls_stateid.seqid;
|
|
stateidp->other[0] = openstp->ls_stateid.other[0];
|
|
stateidp->other[1] = openstp->ls_stateid.other[1];
|
|
stateidp->other[2] = openstp->ls_stateid.other[2];
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
if (new_open)
|
|
free(new_open, M_NFSDSTATE);
|
|
if (new_deleg)
|
|
free(new_deleg, M_NFSDSTATE);
|
|
|
|
/*
|
|
* If the NFSv4.1 client just acquired its first open, write a timestamp
|
|
* to the stable storage file.
|
|
*/
|
|
if (gotstate != 0) {
|
|
nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
|
|
nfsrv_backupstable();
|
|
}
|
|
|
|
out:
|
|
free(clidp, M_TEMP);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Open update. Does the confirm, downgrade and close.
|
|
*/
|
|
int
|
|
nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid,
|
|
nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p,
|
|
int *retwriteaccessp)
|
|
{
|
|
struct nfsstate *stp;
|
|
struct nfsclient *clp;
|
|
struct nfslockfile *lfp;
|
|
u_int32_t bits;
|
|
int error = 0, gotstate = 0, len = 0;
|
|
u_char *clidp = NULL;
|
|
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
*/
|
|
error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
|
|
&new_stp->ls_stateid, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK);
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Get the open structure via clientid and stateid.
|
|
*/
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (!error)
|
|
error = nfsrv_getstate(clp, &new_stp->ls_stateid,
|
|
new_stp->ls_flags, &stp);
|
|
|
|
/*
|
|
* Sanity check the open.
|
|
*/
|
|
if (!error && (!(stp->ls_flags & NFSLCK_OPEN) ||
|
|
(!(new_stp->ls_flags & NFSLCK_CONFIRM) &&
|
|
(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) ||
|
|
((new_stp->ls_flags & NFSLCK_CONFIRM) &&
|
|
(!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)))))
|
|
error = NFSERR_BADSTATEID;
|
|
|
|
if (!error)
|
|
error = nfsrv_checkseqid(nd, new_stp->ls_seq,
|
|
stp->ls_openowner, new_stp->ls_op);
|
|
if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid &&
|
|
(((nd->nd_flag & ND_NFSV41) == 0 &&
|
|
!(new_stp->ls_flags & NFSLCK_CONFIRM)) ||
|
|
((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
new_stp->ls_stateid.seqid != 0)))
|
|
error = NFSERR_OLDSTATEID;
|
|
if (!error && vp->v_type != VREG) {
|
|
if (vp->v_type == VDIR)
|
|
error = NFSERR_ISDIR;
|
|
else
|
|
error = NFSERR_INVAL;
|
|
}
|
|
|
|
if (error) {
|
|
/*
|
|
* If a client tries to confirm an Open with a bad
|
|
* seqid# and there are no byte range locks or other Opens
|
|
* on the openowner, just throw it away, so the next use of the
|
|
* openowner will start a fresh seq#.
|
|
*/
|
|
if (error == NFSERR_BADSEQID &&
|
|
(new_stp->ls_flags & NFSLCK_CONFIRM) &&
|
|
nfsrv_nootherstate(stp))
|
|
nfsrv_freeopenowner(stp->ls_openowner, 0, p);
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Set the return stateid.
|
|
*/
|
|
stateidp->seqid = stp->ls_stateid.seqid + 1;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0)
|
|
stateidp->seqid = 1;
|
|
stateidp->other[0] = stp->ls_stateid.other[0];
|
|
stateidp->other[1] = stp->ls_stateid.other[1];
|
|
stateidp->other[2] = stp->ls_stateid.other[2];
|
|
/*
|
|
* Now, handle the three cases.
|
|
*/
|
|
if (new_stp->ls_flags & NFSLCK_CONFIRM) {
|
|
/*
|
|
* If the open doesn't need confirmation, it seems to me that
|
|
* there is a client error, but I'll just log it and keep going?
|
|
*/
|
|
if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))
|
|
printf("Nfsv4d: stray open confirm\n");
|
|
stp->ls_openowner->ls_flags = 0;
|
|
stp->ls_stateid.seqid++;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
stp->ls_stateid.seqid == 0)
|
|
stp->ls_stateid.seqid = 1;
|
|
if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) {
|
|
clp->lc_flags |= LCL_STAMPEDSTABLE;
|
|
len = clp->lc_idlen;
|
|
NFSBCOPY(clp->lc_id, clidp, len);
|
|
gotstate = 1;
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
} else if (new_stp->ls_flags & NFSLCK_CLOSE) {
|
|
lfp = stp->ls_lfp;
|
|
if (retwriteaccessp != NULL) {
|
|
if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0)
|
|
*retwriteaccessp = 1;
|
|
else
|
|
*retwriteaccessp = 0;
|
|
}
|
|
if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) {
|
|
/* Get the lf lock */
|
|
nfsrv_locklf(lfp);
|
|
NFSUNLOCKSTATE();
|
|
ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate");
|
|
NFSVOPUNLOCK(vp);
|
|
if (nfsrv_freeopen(stp, vp, 1, p) == 0) {
|
|
NFSLOCKSTATE();
|
|
nfsrv_unlocklf(lfp);
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
} else {
|
|
(void) nfsrv_freeopen(stp, NULL, 0, p);
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
} else {
|
|
/*
|
|
* Update the share bits, making sure that the new set are a
|
|
* subset of the old ones.
|
|
*/
|
|
bits = (new_stp->ls_flags & NFSLCK_SHAREBITS);
|
|
if (~(stp->ls_flags) & bits) {
|
|
NFSUNLOCKSTATE();
|
|
error = NFSERR_INVAL;
|
|
goto out;
|
|
}
|
|
stp->ls_flags = (bits | NFSLCK_OPEN);
|
|
stp->ls_stateid.seqid++;
|
|
if ((nd->nd_flag & ND_NFSV41) != 0 &&
|
|
stp->ls_stateid.seqid == 0)
|
|
stp->ls_stateid.seqid = 1;
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
|
|
/*
|
|
* If the client just confirmed its first open, write a timestamp
|
|
* to the stable storage file.
|
|
*/
|
|
if (gotstate != 0) {
|
|
nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p);
|
|
nfsrv_backupstable();
|
|
}
|
|
|
|
out:
|
|
free(clidp, M_TEMP);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delegation update. Does the purge and return.
|
|
*/
|
|
int
|
|
nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid,
|
|
nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred,
|
|
NFSPROC_T *p, int *retwriteaccessp)
|
|
{
|
|
struct nfsstate *stp;
|
|
struct nfsclient *clp;
|
|
int error = 0;
|
|
fhandle_t fh;
|
|
|
|
/*
|
|
* Do a sanity check against the file handle for DelegReturn.
|
|
*/
|
|
if (vp) {
|
|
error = nfsvno_getfh(vp, &fh, p);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
*/
|
|
if (op == NFSV4OP_DELEGRETURN)
|
|
error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN,
|
|
stateidp, 0);
|
|
else
|
|
error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE,
|
|
stateidp, 0);
|
|
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Get the open structure via clientid and stateid.
|
|
*/
|
|
if (!error)
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (error) {
|
|
if (error == NFSERR_CBPATHDOWN)
|
|
error = 0;
|
|
if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN)
|
|
error = NFSERR_STALESTATEID;
|
|
}
|
|
if (!error && op == NFSV4OP_DELEGRETURN) {
|
|
error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp);
|
|
if (!error && stp->ls_stateid.seqid != stateidp->seqid &&
|
|
((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0))
|
|
error = NFSERR_OLDSTATEID;
|
|
}
|
|
/*
|
|
* NFSERR_EXPIRED means that the state has gone away,
|
|
* so Delegations have been purged. Just return ok.
|
|
*/
|
|
if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) {
|
|
NFSUNLOCKSTATE();
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
if (op == NFSV4OP_DELEGRETURN) {
|
|
if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh,
|
|
sizeof (fhandle_t))) {
|
|
NFSUNLOCKSTATE();
|
|
error = NFSERR_BADSTATEID;
|
|
goto out;
|
|
}
|
|
if (retwriteaccessp != NULL) {
|
|
if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0)
|
|
*retwriteaccessp = 1;
|
|
else
|
|
*retwriteaccessp = 0;
|
|
}
|
|
nfsrv_freedeleg(stp);
|
|
} else {
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
error = 0;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Release lock owner.
|
|
*/
|
|
int
|
|
nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid,
|
|
NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *stp, *nstp, *openstp, *ownstp;
|
|
struct nfsclient *clp;
|
|
int error = 0;
|
|
|
|
/*
|
|
* Check for restart conditions (client and server).
|
|
*/
|
|
error = nfsrv_checkrestart(clientid, new_stp->ls_flags,
|
|
&new_stp->ls_stateid, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Get the lock owner by name.
|
|
*/
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, NULL, p);
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
LIST_FOREACH(ownstp, &clp->lc_open, ls_list) {
|
|
LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) {
|
|
stp = LIST_FIRST(&openstp->ls_open);
|
|
while (stp != LIST_END(&openstp->ls_open)) {
|
|
nstp = LIST_NEXT(stp, ls_list);
|
|
/*
|
|
* If the owner matches, check for locks and
|
|
* then free or return an error.
|
|
*/
|
|
if (stp->ls_ownerlen == new_stp->ls_ownerlen &&
|
|
!NFSBCMP(stp->ls_owner, new_stp->ls_owner,
|
|
stp->ls_ownerlen)){
|
|
if (LIST_EMPTY(&stp->ls_lock)) {
|
|
nfsrv_freelockowner(stp, NULL, 0, p);
|
|
} else {
|
|
NFSUNLOCKSTATE();
|
|
error = NFSERR_LOCKSHELD;
|
|
goto out;
|
|
}
|
|
}
|
|
stp = nstp;
|
|
}
|
|
}
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get the file handle for a lock structure.
|
|
*/
|
|
static int
|
|
nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp,
|
|
fhandle_t *nfhp, NFSPROC_T *p)
|
|
{
|
|
fhandle_t *fhp = NULL;
|
|
int error;
|
|
|
|
/*
|
|
* For lock, use the new nfslock structure, otherwise just
|
|
* a fhandle_t on the stack.
|
|
*/
|
|
if (flags & NFSLCK_OPEN) {
|
|
KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL"));
|
|
fhp = &new_lfp->lf_fh;
|
|
} else if (nfhp) {
|
|
fhp = nfhp;
|
|
} else {
|
|
panic("nfsrv_getlockfh");
|
|
}
|
|
error = nfsvno_getfh(vp, fhp, p);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get an nfs lock structure. Allocate one, as required, and return a
|
|
* pointer to it.
|
|
* Returns an NFSERR_xxx upon failure or -1 to indicate no current lock.
|
|
*/
|
|
static int
|
|
nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp,
|
|
struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit)
|
|
{
|
|
struct nfslockfile *lfp;
|
|
fhandle_t *fhp = NULL, *tfhp;
|
|
struct nfslockhashhead *hp;
|
|
struct nfslockfile *new_lfp = NULL;
|
|
|
|
/*
|
|
* For lock, use the new nfslock structure, otherwise just
|
|
* a fhandle_t on the stack.
|
|
*/
|
|
if (flags & NFSLCK_OPEN) {
|
|
new_lfp = *new_lfpp;
|
|
fhp = &new_lfp->lf_fh;
|
|
} else if (nfhp) {
|
|
fhp = nfhp;
|
|
} else {
|
|
panic("nfsrv_getlockfile");
|
|
}
|
|
|
|
hp = NFSLOCKHASH(fhp);
|
|
LIST_FOREACH(lfp, hp, lf_hash) {
|
|
tfhp = &lfp->lf_fh;
|
|
if (NFSVNO_CMPFH(fhp, tfhp)) {
|
|
if (lockit)
|
|
nfsrv_locklf(lfp);
|
|
*lfpp = lfp;
|
|
return (0);
|
|
}
|
|
}
|
|
if (!(flags & NFSLCK_OPEN))
|
|
return (-1);
|
|
|
|
/*
|
|
* No match, so chain the new one into the list.
|
|
*/
|
|
LIST_INIT(&new_lfp->lf_open);
|
|
LIST_INIT(&new_lfp->lf_lock);
|
|
LIST_INIT(&new_lfp->lf_deleg);
|
|
LIST_INIT(&new_lfp->lf_locallock);
|
|
LIST_INIT(&new_lfp->lf_rollback);
|
|
new_lfp->lf_locallock_lck.nfslock_usecnt = 0;
|
|
new_lfp->lf_locallock_lck.nfslock_lock = 0;
|
|
new_lfp->lf_usecount = 0;
|
|
LIST_INSERT_HEAD(hp, new_lfp, lf_hash);
|
|
*lfpp = new_lfp;
|
|
*new_lfpp = NULL;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This function adds a nfslock lock structure to the list for the associated
|
|
* nfsstate and nfslockfile structures. It will be inserted after the
|
|
* entry pointed at by insert_lop.
|
|
*/
|
|
static void
|
|
nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop,
|
|
struct nfsstate *stp, struct nfslockfile *lfp)
|
|
{
|
|
struct nfslock *lop, *nlop;
|
|
|
|
new_lop->lo_stp = stp;
|
|
new_lop->lo_lfp = lfp;
|
|
|
|
if (stp != NULL) {
|
|
/* Insert in increasing lo_first order */
|
|
lop = LIST_FIRST(&lfp->lf_lock);
|
|
if (lop == LIST_END(&lfp->lf_lock) ||
|
|
new_lop->lo_first <= lop->lo_first) {
|
|
LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile);
|
|
} else {
|
|
nlop = LIST_NEXT(lop, lo_lckfile);
|
|
while (nlop != LIST_END(&lfp->lf_lock) &&
|
|
nlop->lo_first < new_lop->lo_first) {
|
|
lop = nlop;
|
|
nlop = LIST_NEXT(lop, lo_lckfile);
|
|
}
|
|
LIST_INSERT_AFTER(lop, new_lop, lo_lckfile);
|
|
}
|
|
} else {
|
|
new_lop->lo_lckfile.le_prev = NULL; /* list not used */
|
|
}
|
|
|
|
/*
|
|
* Insert after insert_lop, which is overloaded as stp or lfp for
|
|
* an empty list.
|
|
*/
|
|
if (stp == NULL && (struct nfslockfile *)insert_lop == lfp)
|
|
LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner);
|
|
else if ((struct nfsstate *)insert_lop == stp)
|
|
LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner);
|
|
else
|
|
LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner);
|
|
if (stp != NULL) {
|
|
NFSD_VNET(nfsstatsv1_p)->srvlocks++;
|
|
nfsrv_openpluslock++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function updates the locking for a lock owner and given file. It
|
|
* maintains a list of lock ranges ordered on increasing file offset that
|
|
* are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style).
|
|
* It always adds new_lop to the list and sometimes uses the one pointed
|
|
* at by other_lopp.
|
|
*/
|
|
static void
|
|
nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
|
|
struct nfslock **other_lopp, struct nfslockfile *lfp)
|
|
{
|
|
struct nfslock *new_lop = *new_lopp;
|
|
struct nfslock *lop, *tlop, *ilop;
|
|
struct nfslock *other_lop = *other_lopp;
|
|
int unlock = 0, myfile = 0;
|
|
u_int64_t tmp;
|
|
|
|
/*
|
|
* Work down the list until the lock is merged.
|
|
*/
|
|
if (new_lop->lo_flags & NFSLCK_UNLOCK)
|
|
unlock = 1;
|
|
if (stp != NULL) {
|
|
ilop = (struct nfslock *)stp;
|
|
lop = LIST_FIRST(&stp->ls_lock);
|
|
} else {
|
|
ilop = (struct nfslock *)lfp;
|
|
lop = LIST_FIRST(&lfp->lf_locallock);
|
|
}
|
|
while (lop != NULL) {
|
|
/*
|
|
* Only check locks for this file that aren't before the start of
|
|
* new lock's range.
|
|
*/
|
|
if (lop->lo_lfp == lfp) {
|
|
myfile = 1;
|
|
if (lop->lo_end >= new_lop->lo_first) {
|
|
if (new_lop->lo_end < lop->lo_first) {
|
|
/*
|
|
* If the new lock ends before the start of the
|
|
* current lock's range, no merge, just insert
|
|
* the new lock.
|
|
*/
|
|
break;
|
|
}
|
|
if (new_lop->lo_flags == lop->lo_flags ||
|
|
(new_lop->lo_first <= lop->lo_first &&
|
|
new_lop->lo_end >= lop->lo_end)) {
|
|
/*
|
|
* This lock can be absorbed by the new lock/unlock.
|
|
* This happens when it covers the entire range
|
|
* of the old lock or is contiguous
|
|
* with the old lock and is of the same type or an
|
|
* unlock.
|
|
*/
|
|
if (lop->lo_first < new_lop->lo_first)
|
|
new_lop->lo_first = lop->lo_first;
|
|
if (lop->lo_end > new_lop->lo_end)
|
|
new_lop->lo_end = lop->lo_end;
|
|
tlop = lop;
|
|
lop = LIST_NEXT(lop, lo_lckowner);
|
|
nfsrv_freenfslock(tlop);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* All these cases are for contiguous locks that are not the
|
|
* same type, so they can't be merged.
|
|
*/
|
|
if (new_lop->lo_first <= lop->lo_first) {
|
|
/*
|
|
* This case is where the new lock overlaps with the
|
|
* first part of the old lock. Move the start of the
|
|
* old lock to just past the end of the new lock. The
|
|
* new lock will be inserted in front of the old, since
|
|
* ilop hasn't been updated. (We are done now.)
|
|
*/
|
|
lop->lo_first = new_lop->lo_end;
|
|
break;
|
|
}
|
|
if (new_lop->lo_end >= lop->lo_end) {
|
|
/*
|
|
* This case is where the new lock overlaps with the
|
|
* end of the old lock's range. Move the old lock's
|
|
* end to just before the new lock's first and insert
|
|
* the new lock after the old lock.
|
|
* Might not be done yet, since the new lock could
|
|
* overlap further locks with higher ranges.
|
|
*/
|
|
lop->lo_end = new_lop->lo_first;
|
|
ilop = lop;
|
|
lop = LIST_NEXT(lop, lo_lckowner);
|
|
continue;
|
|
}
|
|
/*
|
|
* The final case is where the new lock's range is in the
|
|
* middle of the current lock's and splits the current lock
|
|
* up. Use *other_lopp to handle the second part of the
|
|
* split old lock range. (We are done now.)
|
|
* For unlock, we use new_lop as other_lop and tmp, since
|
|
* other_lop and new_lop are the same for this case.
|
|
* We noted the unlock case above, so we don't need
|
|
* new_lop->lo_flags any longer.
|
|
*/
|
|
tmp = new_lop->lo_first;
|
|
if (other_lop == NULL) {
|
|
if (!unlock)
|
|
panic("nfsd srv update unlock");
|
|
other_lop = new_lop;
|
|
*new_lopp = NULL;
|
|
}
|
|
other_lop->lo_first = new_lop->lo_end;
|
|
other_lop->lo_end = lop->lo_end;
|
|
other_lop->lo_flags = lop->lo_flags;
|
|
other_lop->lo_stp = stp;
|
|
other_lop->lo_lfp = lfp;
|
|
lop->lo_end = tmp;
|
|
nfsrv_insertlock(other_lop, lop, stp, lfp);
|
|
*other_lopp = NULL;
|
|
ilop = lop;
|
|
break;
|
|
}
|
|
}
|
|
ilop = lop;
|
|
lop = LIST_NEXT(lop, lo_lckowner);
|
|
if (myfile && (lop == NULL || lop->lo_lfp != lfp))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Insert the new lock in the list at the appropriate place.
|
|
*/
|
|
if (!unlock) {
|
|
nfsrv_insertlock(new_lop, ilop, stp, lfp);
|
|
*new_lopp = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function handles sequencing of locks, etc.
|
|
* It returns an error that indicates what the caller should do.
|
|
*/
|
|
static int
|
|
nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid,
|
|
struct nfsstate *stp, struct nfsrvcache *op)
|
|
{
|
|
int error = 0;
|
|
|
|
if ((nd->nd_flag & ND_NFSV41) != 0)
|
|
/* NFSv4.1 ignores the open_seqid and lock_seqid. */
|
|
goto out;
|
|
if (op != nd->nd_rp)
|
|
panic("nfsrvstate checkseqid");
|
|
if (!(op->rc_flag & RC_INPROG))
|
|
panic("nfsrvstate not inprog");
|
|
if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) {
|
|
printf("refcnt=%d\n", stp->ls_op->rc_refcnt);
|
|
panic("nfsrvstate op refcnt");
|
|
}
|
|
|
|
/* If ND_ERELOOKUP is set, the seqid has already been handled. */
|
|
if ((nd->nd_flag & ND_ERELOOKUP) != 0)
|
|
goto out;
|
|
|
|
if ((stp->ls_seq + 1) == seqid) {
|
|
if (stp->ls_op)
|
|
nfsrvd_derefcache(stp->ls_op);
|
|
stp->ls_op = op;
|
|
nfsrvd_refcache(op);
|
|
stp->ls_seq = seqid;
|
|
goto out;
|
|
} else if (stp->ls_seq == seqid && stp->ls_op &&
|
|
op->rc_xid == stp->ls_op->rc_xid &&
|
|
op->rc_refcnt == 0 &&
|
|
op->rc_reqlen == stp->ls_op->rc_reqlen &&
|
|
op->rc_cksum == stp->ls_op->rc_cksum) {
|
|
if (stp->ls_op->rc_flag & RC_INPROG) {
|
|
error = NFSERR_DONTREPLY;
|
|
goto out;
|
|
}
|
|
nd->nd_rp = stp->ls_op;
|
|
nd->nd_rp->rc_flag |= RC_INPROG;
|
|
nfsrvd_delcache(op);
|
|
error = NFSERR_REPLYFROMCACHE;
|
|
goto out;
|
|
}
|
|
error = NFSERR_BADSEQID;
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get the client ip address for callbacks. If the strings can't be parsed,
|
|
* just set lc_program to 0 to indicate no callbacks are possible.
|
|
* (For cases where the address can't be parsed or is 0.0.0.0.0.0, set
|
|
* the address to the client's transport address. This won't be used
|
|
* for callbacks, but can be printed out by nfsstats for info.)
|
|
* Return error if the xdr can't be parsed, 0 otherwise.
|
|
*/
|
|
int
|
|
nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp)
|
|
{
|
|
u_int32_t *tl;
|
|
u_char *cp, *cp2;
|
|
int i, j, maxalen = 0, minalen = 0;
|
|
sa_family_t af;
|
|
#ifdef INET
|
|
struct sockaddr_in *rin = NULL, *sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *rin6 = NULL, *sin6;
|
|
#endif
|
|
u_char *addr;
|
|
int error = 0, cantparse = 0;
|
|
union {
|
|
in_addr_t ival;
|
|
u_char cval[4];
|
|
} ip;
|
|
union {
|
|
in_port_t sval;
|
|
u_char cval[2];
|
|
} port;
|
|
|
|
/* 8 is the maximum length of the port# string. */
|
|
addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK);
|
|
clp->lc_req.nr_client = NULL;
|
|
clp->lc_req.nr_lock = 0;
|
|
af = AF_UNSPEC;
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *tl);
|
|
if (i >= 3 && i <= 4) {
|
|
error = nfsrv_mtostr(nd, addr, i);
|
|
if (error)
|
|
goto nfsmout;
|
|
#ifdef INET
|
|
if (!strcmp(addr, "tcp")) {
|
|
clp->lc_flags |= LCL_TCPCALLBACK;
|
|
clp->lc_req.nr_sotype = SOCK_STREAM;
|
|
clp->lc_req.nr_soproto = IPPROTO_TCP;
|
|
af = AF_INET;
|
|
} else if (!strcmp(addr, "udp")) {
|
|
clp->lc_req.nr_sotype = SOCK_DGRAM;
|
|
clp->lc_req.nr_soproto = IPPROTO_UDP;
|
|
af = AF_INET;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (af == AF_UNSPEC) {
|
|
if (!strcmp(addr, "tcp6")) {
|
|
clp->lc_flags |= LCL_TCPCALLBACK;
|
|
clp->lc_req.nr_sotype = SOCK_STREAM;
|
|
clp->lc_req.nr_soproto = IPPROTO_TCP;
|
|
af = AF_INET6;
|
|
} else if (!strcmp(addr, "udp6")) {
|
|
clp->lc_req.nr_sotype = SOCK_DGRAM;
|
|
clp->lc_req.nr_soproto = IPPROTO_UDP;
|
|
af = AF_INET6;
|
|
}
|
|
}
|
|
#endif
|
|
if (af == AF_UNSPEC) {
|
|
cantparse = 1;
|
|
}
|
|
} else {
|
|
cantparse = 1;
|
|
if (i > 0) {
|
|
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
|
|
if (error)
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
/*
|
|
* The caller has allocated clp->lc_req.nr_nam to be large enough
|
|
* for either AF_INET or AF_INET6 and zeroed out the contents.
|
|
* maxalen is set to the maximum length of the host IP address string
|
|
* plus 8 for the maximum length of the port#.
|
|
* minalen is set to the minimum length of the host IP address string
|
|
* plus 4 for the minimum length of the port#.
|
|
* These lengths do not include NULL termination,
|
|
* so INET[6]_ADDRSTRLEN - 1 is used in the calculations.
|
|
*/
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
|
|
rin->sin_family = AF_INET;
|
|
rin->sin_len = sizeof(struct sockaddr_in);
|
|
maxalen = INET_ADDRSTRLEN - 1 + 8;
|
|
minalen = 7 + 4;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
|
|
rin6->sin6_family = AF_INET6;
|
|
rin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
maxalen = INET6_ADDRSTRLEN - 1 + 8;
|
|
minalen = 3 + 4;
|
|
break;
|
|
#endif
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *tl);
|
|
if (i < 0) {
|
|
error = NFSERR_BADXDR;
|
|
goto nfsmout;
|
|
} else if (i == 0) {
|
|
cantparse = 1;
|
|
} else if (!cantparse && i <= maxalen && i >= minalen) {
|
|
error = nfsrv_mtostr(nd, addr, i);
|
|
if (error)
|
|
goto nfsmout;
|
|
|
|
/*
|
|
* Parse out the address fields. We expect 6 decimal numbers
|
|
* separated by '.'s for AF_INET and two decimal numbers
|
|
* preceeded by '.'s for AF_INET6.
|
|
*/
|
|
cp = NULL;
|
|
switch (af) {
|
|
#ifdef INET6
|
|
/*
|
|
* For AF_INET6, first parse the host address.
|
|
*/
|
|
case AF_INET6:
|
|
cp = strchr(addr, '.');
|
|
if (cp != NULL) {
|
|
*cp++ = '\0';
|
|
if (inet_pton(af, addr, &rin6->sin6_addr) == 1)
|
|
i = 4;
|
|
else {
|
|
cp = NULL;
|
|
cantparse = 1;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET
|
|
case AF_INET:
|
|
cp = addr;
|
|
i = 0;
|
|
break;
|
|
#endif
|
|
}
|
|
while (cp != NULL && *cp && i < 6) {
|
|
cp2 = cp;
|
|
while (*cp2 && *cp2 != '.')
|
|
cp2++;
|
|
if (*cp2)
|
|
*cp2++ = '\0';
|
|
else if (i != 5) {
|
|
cantparse = 1;
|
|
break;
|
|
}
|
|
j = nfsrv_getipnumber(cp);
|
|
if (j >= 0) {
|
|
if (i < 4)
|
|
ip.cval[3 - i] = j;
|
|
else
|
|
port.cval[5 - i] = j;
|
|
} else {
|
|
cantparse = 1;
|
|
break;
|
|
}
|
|
cp = cp2;
|
|
i++;
|
|
}
|
|
if (!cantparse) {
|
|
/*
|
|
* The host address INADDR_ANY is (mis)used to indicate
|
|
* "there is no valid callback address".
|
|
*/
|
|
switch (af) {
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr,
|
|
&in6addr_any))
|
|
rin6->sin6_port = htons(port.sval);
|
|
else
|
|
cantparse = 1;
|
|
break;
|
|
#endif
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (ip.ival != INADDR_ANY) {
|
|
rin->sin_addr.s_addr = htonl(ip.ival);
|
|
rin->sin_port = htons(port.sval);
|
|
} else {
|
|
cantparse = 1;
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
} else {
|
|
cantparse = 1;
|
|
if (i > 0) {
|
|
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
|
|
if (error)
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
if (cantparse) {
|
|
switch (nd->nd_nam->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)nd->nd_nam;
|
|
rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
|
|
rin->sin_family = AF_INET;
|
|
rin->sin_len = sizeof(struct sockaddr_in);
|
|
rin->sin_addr.s_addr = sin->sin_addr.s_addr;
|
|
rin->sin_port = 0x0;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)nd->nd_nam;
|
|
rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
|
|
rin6->sin6_family = AF_INET6;
|
|
rin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
rin6->sin6_addr = sin6->sin6_addr;
|
|
rin6->sin6_port = 0x0;
|
|
break;
|
|
#endif
|
|
}
|
|
clp->lc_program = 0;
|
|
}
|
|
nfsmout:
|
|
free(addr, M_TEMP);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Turn a string of up to three decimal digits into a number. Return -1 upon
|
|
* error.
|
|
*/
|
|
static int
|
|
nfsrv_getipnumber(u_char *cp)
|
|
{
|
|
int i = 0, j = 0;
|
|
|
|
while (*cp) {
|
|
if (j > 2 || *cp < '0' || *cp > '9')
|
|
return (-1);
|
|
i *= 10;
|
|
i += (*cp - '0');
|
|
cp++;
|
|
j++;
|
|
}
|
|
if (i < 256)
|
|
return (i);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* This function checks for restart conditions.
|
|
*/
|
|
static int
|
|
nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags,
|
|
nfsv4stateid_t *stateidp, int specialid)
|
|
{
|
|
int ret = 0;
|
|
|
|
/*
|
|
* First check for a server restart. Open, LockT, ReleaseLockOwner
|
|
* and DelegPurge have a clientid, the rest a stateid.
|
|
*/
|
|
if (flags &
|
|
(NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) {
|
|
if (clientid.lval[0] != NFSD_VNET(nfsrvboottime)) {
|
|
ret = NFSERR_STALECLIENTID;
|
|
goto out;
|
|
}
|
|
} else if (stateidp->other[0] != NFSD_VNET(nfsrvboottime) &&
|
|
specialid == 0) {
|
|
ret = NFSERR_STALESTATEID;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Read, Write, Setattr and LockT can return NFSERR_GRACE and do
|
|
* not use a lock/open owner seqid#, so the check can be done now.
|
|
* (The others will be checked, as required, later.)
|
|
*/
|
|
if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST)))
|
|
goto out;
|
|
|
|
NFSLOCKSTATE();
|
|
ret = nfsrv_checkgrace(NULL, NULL, flags);
|
|
NFSUNLOCKSTATE();
|
|
|
|
out:
|
|
NFSEXITCODE(ret);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Check for grace.
|
|
*/
|
|
static int
|
|
nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp,
|
|
u_int32_t flags)
|
|
{
|
|
int error = 0, notreclaimed;
|
|
struct nfsrv_stable *sp;
|
|
|
|
if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & (NFSNSF_UPDATEDONE |
|
|
NFSNSF_GRACEOVER)) == 0) {
|
|
/*
|
|
* First, check to see if all of the clients have done a
|
|
* ReclaimComplete. If so, grace can end now.
|
|
*/
|
|
notreclaimed = 0;
|
|
LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head,
|
|
nst_list) {
|
|
if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) {
|
|
notreclaimed = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (notreclaimed == 0)
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_flags |=
|
|
(NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
|
|
}
|
|
|
|
if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_GRACEOVER) != 0) {
|
|
if (flags & NFSLCK_RECLAIM) {
|
|
error = NFSERR_NOGRACE;
|
|
goto out;
|
|
}
|
|
} else {
|
|
if (!(flags & NFSLCK_RECLAIM)) {
|
|
error = NFSERR_GRACE;
|
|
goto out;
|
|
}
|
|
if (nd != NULL && clp != NULL &&
|
|
(nd->nd_flag & ND_NFSV41) != 0 &&
|
|
(clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) {
|
|
error = NFSERR_NOGRACE;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If grace is almost over and we are still getting Reclaims,
|
|
* extend grace a bit.
|
|
*/
|
|
if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) >
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_eograce)
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_eograce =
|
|
NFSD_MONOSEC + NFSRV_LEASEDELTA;
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do a server callback.
|
|
* The "trunc" argument is slightly overloaded and refers to different
|
|
* boolean arguments for CBRECALL and CBLAYOUTRECALL.
|
|
*/
|
|
static int
|
|
nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp,
|
|
int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp,
|
|
int laytype, NFSPROC_T *p)
|
|
{
|
|
struct mbuf *m;
|
|
u_int32_t *tl;
|
|
struct nfsrv_descript *nd;
|
|
struct ucred *cred;
|
|
int error = 0, slotpos;
|
|
u_int32_t callback;
|
|
struct nfsdsession *sep = NULL;
|
|
uint64_t tval;
|
|
bool dotls;
|
|
|
|
nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO);
|
|
cred = newnfs_getcred();
|
|
NFSLOCKSTATE(); /* mostly for lc_cbref++ */
|
|
if (clp->lc_flags & LCL_NEEDSCONFIRM) {
|
|
NFSUNLOCKSTATE();
|
|
panic("docallb");
|
|
}
|
|
clp->lc_cbref++;
|
|
|
|
/*
|
|
* Fill the callback program# and version into the request
|
|
* structure for newnfs_connect() to use.
|
|
*/
|
|
clp->lc_req.nr_prog = clp->lc_program;
|
|
#ifdef notnow
|
|
if ((clp->lc_flags & LCL_NFSV41) != 0)
|
|
clp->lc_req.nr_vers = NFSV41_CBVERS;
|
|
else
|
|
#endif
|
|
clp->lc_req.nr_vers = NFSV4_CBVERS;
|
|
|
|
/*
|
|
* First, fill in some of the fields of nd and cr.
|
|
*/
|
|
nd->nd_flag = ND_NFSV4;
|
|
if (clp->lc_flags & LCL_GSS)
|
|
nd->nd_flag |= ND_KERBV;
|
|
if ((clp->lc_flags & LCL_NFSV41) != 0)
|
|
nd->nd_flag |= ND_NFSV41;
|
|
if ((clp->lc_flags & LCL_NFSV42) != 0)
|
|
nd->nd_flag |= ND_NFSV42;
|
|
nd->nd_repstat = 0;
|
|
cred->cr_uid = clp->lc_uid;
|
|
cred->cr_gid = clp->lc_gid;
|
|
callback = clp->lc_callback;
|
|
NFSUNLOCKSTATE();
|
|
cred->cr_ngroups = 1;
|
|
|
|
/*
|
|
* Get the first mbuf for the request.
|
|
*/
|
|
MGET(m, M_WAITOK, MT_DATA);
|
|
m->m_len = 0;
|
|
nd->nd_mreq = nd->nd_mb = m;
|
|
nd->nd_bpos = mtod(m, caddr_t);
|
|
|
|
/*
|
|
* and build the callback request.
|
|
*/
|
|
if (procnum == NFSV4OP_CBGETATTR) {
|
|
nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
|
|
error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR,
|
|
"CB Getattr", &sep, &slotpos);
|
|
if (error != 0) {
|
|
m_freem(nd->nd_mreq);
|
|
goto errout;
|
|
}
|
|
(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
|
|
(void)nfsrv_putattrbit(nd, attrbitp);
|
|
} else if (procnum == NFSV4OP_CBRECALL) {
|
|
nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
|
|
error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL,
|
|
"CB Recall", &sep, &slotpos);
|
|
if (error != 0) {
|
|
m_freem(nd->nd_mreq);
|
|
goto errout;
|
|
}
|
|
NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
|
|
*tl++ = txdr_unsigned(stateidp->seqid);
|
|
NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl,
|
|
NFSX_STATEIDOTHER);
|
|
tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
|
|
if (trunc)
|
|
*tl = newnfs_true;
|
|
else
|
|
*tl = newnfs_false;
|
|
(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0);
|
|
} else if (procnum == NFSV4OP_CBLAYOUTRECALL) {
|
|
NFSD_DEBUG(4, "docallback layout recall\n");
|
|
nd->nd_procnum = NFSV4PROC_CBCOMPOUND;
|
|
error = nfsrv_cbcallargs(nd, clp, callback,
|
|
NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep, &slotpos);
|
|
NFSD_DEBUG(4, "aft cbcallargs=%d\n", error);
|
|
if (error != 0) {
|
|
m_freem(nd->nd_mreq);
|
|
goto errout;
|
|
}
|
|
NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(laytype);
|
|
*tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY);
|
|
if (trunc)
|
|
*tl++ = newnfs_true;
|
|
else
|
|
*tl++ = newnfs_false;
|
|
*tl = txdr_unsigned(NFSV4LAYOUTRET_FILE);
|
|
(void)nfsm_fhtom(NULL, nd, (uint8_t *)fhp, NFSX_MYFH, 0);
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID);
|
|
tval = 0;
|
|
txdr_hyper(tval, tl); tl += 2;
|
|
tval = UINT64_MAX;
|
|
txdr_hyper(tval, tl); tl += 2;
|
|
*tl++ = txdr_unsigned(stateidp->seqid);
|
|
NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER);
|
|
tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
|
|
NFSD_DEBUG(4, "aft args\n");
|
|
} else if (procnum == NFSV4PROC_CBNULL) {
|
|
nd->nd_procnum = NFSV4PROC_CBNULL;
|
|
if ((clp->lc_flags & LCL_NFSV41) != 0) {
|
|
error = nfsv4_getcbsession(clp, &sep);
|
|
if (error != 0) {
|
|
m_freem(nd->nd_mreq);
|
|
goto errout;
|
|
}
|
|
}
|
|
} else {
|
|
error = NFSERR_SERVERFAULT;
|
|
m_freem(nd->nd_mreq);
|
|
goto errout;
|
|
}
|
|
|
|
/*
|
|
* Call newnfs_connect(), as required, and then newnfs_request().
|
|
*/
|
|
dotls = false;
|
|
if ((clp->lc_flags & LCL_TLSCB) != 0)
|
|
dotls = true;
|
|
(void) newnfs_sndlock(&clp->lc_req.nr_lock);
|
|
if (clp->lc_req.nr_client == NULL) {
|
|
if ((clp->lc_flags & LCL_NFSV41) != 0) {
|
|
error = ECONNREFUSED;
|
|
if (procnum != NFSV4PROC_CBNULL)
|
|
nfsv4_freeslot(&sep->sess_cbsess, slotpos,
|
|
true);
|
|
nfsrv_freesession(NULL, sep, NULL);
|
|
} else if (nd->nd_procnum == NFSV4PROC_CBNULL)
|
|
error = newnfs_connect(NULL, &clp->lc_req, cred,
|
|
NULL, 1, dotls, &clp->lc_req.nr_client);
|
|
else
|
|
error = newnfs_connect(NULL, &clp->lc_req, cred,
|
|
NULL, 3, dotls, &clp->lc_req.nr_client);
|
|
}
|
|
newnfs_sndunlock(&clp->lc_req.nr_lock);
|
|
NFSD_DEBUG(4, "aft sndunlock=%d\n", error);
|
|
if (!error) {
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
KASSERT(sep != NULL, ("sep NULL"));
|
|
if (sep->sess_cbsess.nfsess_xprt != NULL)
|
|
error = newnfs_request(nd, NULL, clp,
|
|
&clp->lc_req, NULL, NULL, cred,
|
|
clp->lc_program, clp->lc_req.nr_vers, NULL,
|
|
1, NULL, &sep->sess_cbsess);
|
|
else {
|
|
/*
|
|
* This should probably never occur, but if a
|
|
* client somehow does an RPC without a
|
|
* SequenceID Op that causes a callback just
|
|
* after the nfsd threads have been terminated
|
|
* and restared we could conceivably get here
|
|
* without a backchannel xprt.
|
|
*/
|
|
printf("nfsrv_docallback: no xprt\n");
|
|
error = ECONNREFUSED;
|
|
}
|
|
NFSD_DEBUG(4, "aft newnfs_request=%d\n", error);
|
|
if (error != 0 && procnum != NFSV4PROC_CBNULL) {
|
|
/*
|
|
* It is likely that the callback was never
|
|
* processed by the client and, as such,
|
|
* the sequence# for the session slot needs
|
|
* to be backed up by one to avoid a
|
|
* NFSERR_SEQMISORDERED error reply.
|
|
* For the unlikely case where the callback
|
|
* was processed by the client, this will
|
|
* make the next callback on the slot
|
|
* appear to be a retry.
|
|
* Since callbacks never specify that the
|
|
* reply be cached, this "apparent retry"
|
|
* should not be a problem.
|
|
*/
|
|
nfsv4_freeslot(&sep->sess_cbsess, slotpos,
|
|
true);
|
|
}
|
|
nfsrv_freesession(NULL, sep, NULL);
|
|
} else
|
|
error = newnfs_request(nd, NULL, clp, &clp->lc_req,
|
|
NULL, NULL, cred, clp->lc_program,
|
|
clp->lc_req.nr_vers, NULL, 1, NULL, NULL);
|
|
}
|
|
errout:
|
|
NFSFREECRED(cred);
|
|
|
|
/*
|
|
* If error is set here, the Callback path isn't working
|
|
* properly, so twiddle the appropriate LCL_ flags.
|
|
* (nd_repstat != 0 indicates the Callback path is working,
|
|
* but the callback failed on the client.)
|
|
*/
|
|
if (error) {
|
|
/*
|
|
* Mark the callback pathway down, which disabled issuing
|
|
* of delegations and gets Renew to return NFSERR_CBPATHDOWN.
|
|
*/
|
|
NFSLOCKSTATE();
|
|
clp->lc_flags |= LCL_CBDOWN;
|
|
NFSUNLOCKSTATE();
|
|
} else {
|
|
/*
|
|
* Callback worked. If the callback path was down, disable
|
|
* callbacks, so no more delegations will be issued. (This
|
|
* is done on the assumption that the callback pathway is
|
|
* flakey.)
|
|
*/
|
|
NFSLOCKSTATE();
|
|
if (clp->lc_flags & LCL_CBDOWN)
|
|
clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON);
|
|
NFSUNLOCKSTATE();
|
|
if (nd->nd_repstat) {
|
|
error = nd->nd_repstat;
|
|
NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n",
|
|
procnum, error);
|
|
} else if (error == 0 && procnum == NFSV4OP_CBGETATTR)
|
|
error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
|
|
NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL,
|
|
p, NULL);
|
|
m_freem(nd->nd_mrep);
|
|
}
|
|
NFSLOCKSTATE();
|
|
clp->lc_cbref--;
|
|
if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) {
|
|
clp->lc_flags &= ~LCL_WAKEUPWANTED;
|
|
wakeup(clp);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
|
|
free(nd, M_TEMP);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set up the compound RPC for the callback.
|
|
*/
|
|
static int
|
|
nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp,
|
|
uint32_t callback, int op, const char *optag, struct nfsdsession **sepp,
|
|
int *slotposp)
|
|
{
|
|
uint32_t *tl;
|
|
int error, len;
|
|
|
|
len = strlen(optag);
|
|
(void)nfsm_strtom(nd, optag, len);
|
|
NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED);
|
|
if ((nd->nd_flag & ND_NFSV41) != 0) {
|
|
if ((nd->nd_flag & ND_NFSV42) != 0)
|
|
*tl++ = txdr_unsigned(NFSV42_MINORVERSION);
|
|
else
|
|
*tl++ = txdr_unsigned(NFSV41_MINORVERSION);
|
|
*tl++ = txdr_unsigned(callback);
|
|
*tl++ = txdr_unsigned(2);
|
|
*tl = txdr_unsigned(NFSV4OP_CBSEQUENCE);
|
|
error = nfsv4_setcbsequence(nd, clp, 1, sepp, slotposp);
|
|
if (error != 0)
|
|
return (error);
|
|
NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
*tl = txdr_unsigned(op);
|
|
} else {
|
|
*tl++ = txdr_unsigned(NFSV4_MINORVERSION);
|
|
*tl++ = txdr_unsigned(callback);
|
|
*tl++ = txdr_unsigned(1);
|
|
*tl = txdr_unsigned(op);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return the next index# for a clientid. Mostly just increment and return
|
|
* the next one, but... if the 32bit unsigned does actually wrap around,
|
|
* it should be rebooted.
|
|
* At an average rate of one new client per second, it will wrap around in
|
|
* approximately 136 years. (I think the server will have been shut
|
|
* down or rebooted before then.)
|
|
*/
|
|
static u_int32_t
|
|
nfsrv_nextclientindex(void)
|
|
{
|
|
static u_int32_t client_index = 0;
|
|
|
|
client_index++;
|
|
if (client_index != 0)
|
|
return (client_index);
|
|
|
|
printf("%s: out of clientids\n", __func__);
|
|
return (client_index);
|
|
}
|
|
|
|
/*
|
|
* Return the next index# for a stateid. Mostly just increment and return
|
|
* the next one, but... if the 32bit unsigned does actually wrap around
|
|
* (will a BSD server stay up that long?), find
|
|
* new start and end values.
|
|
*/
|
|
static u_int32_t
|
|
nfsrv_nextstateindex(struct nfsclient *clp)
|
|
{
|
|
struct nfsstate *stp;
|
|
int i;
|
|
u_int32_t canuse, min_index, max_index;
|
|
|
|
if (!(clp->lc_flags & LCL_INDEXNOTOK)) {
|
|
clp->lc_stateindex++;
|
|
if (clp->lc_stateindex != clp->lc_statemaxindex)
|
|
return (clp->lc_stateindex);
|
|
}
|
|
|
|
/*
|
|
* Yuck, we've hit the end.
|
|
* Look for a new min and max.
|
|
*/
|
|
min_index = 0;
|
|
max_index = 0xffffffff;
|
|
for (i = 0; i < nfsrv_statehashsize; i++) {
|
|
LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
|
|
if (stp->ls_stateid.other[2] > 0x80000000) {
|
|
if (stp->ls_stateid.other[2] < max_index)
|
|
max_index = stp->ls_stateid.other[2];
|
|
} else {
|
|
if (stp->ls_stateid.other[2] > min_index)
|
|
min_index = stp->ls_stateid.other[2];
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Yikes, highly unlikely, but I'll handle it anyhow.
|
|
*/
|
|
if (min_index == 0x80000000 && max_index == 0x80000001) {
|
|
canuse = 0;
|
|
/*
|
|
* Loop around until we find an unused entry. Return that
|
|
* and set LCL_INDEXNOTOK, so the search will continue next time.
|
|
* (This is one of those rare cases where a goto is the
|
|
* cleanest way to code the loop.)
|
|
*/
|
|
tryagain:
|
|
for (i = 0; i < nfsrv_statehashsize; i++) {
|
|
LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) {
|
|
if (stp->ls_stateid.other[2] == canuse) {
|
|
canuse++;
|
|
goto tryagain;
|
|
}
|
|
}
|
|
}
|
|
clp->lc_flags |= LCL_INDEXNOTOK;
|
|
return (canuse);
|
|
}
|
|
|
|
/*
|
|
* Ok to start again from min + 1.
|
|
*/
|
|
clp->lc_stateindex = min_index + 1;
|
|
clp->lc_statemaxindex = max_index;
|
|
clp->lc_flags &= ~LCL_INDEXNOTOK;
|
|
return (clp->lc_stateindex);
|
|
}
|
|
|
|
/*
|
|
* The following functions handle the stable storage file that deals with
|
|
* the edge conditions described in RFC3530 Sec. 8.6.3.
|
|
* The file is as follows:
|
|
* - a single record at the beginning that has the lease time of the
|
|
* previous server instance (before the last reboot) and the nfsrvboottime
|
|
* values for the previous server boots.
|
|
* These previous boot times are used to ensure that the current
|
|
* nfsrvboottime does not, somehow, get set to a previous one.
|
|
* (This is important so that Stale ClientIDs and StateIDs can
|
|
* be recognized.)
|
|
* The number of previous nfsvrboottime values precedes the list.
|
|
* - followed by some number of appended records with:
|
|
* - client id string
|
|
* - flag that indicates it is a record revoking state via lease
|
|
* expiration or similar
|
|
* OR has successfully acquired state.
|
|
* These structures vary in length, with the client string at the end, up
|
|
* to NFSV4_OPAQUELIMIT in size.
|
|
*
|
|
* At the end of the grace period, the file is truncated, the first
|
|
* record is rewritten with updated information and any acquired state
|
|
* records for successful reclaims of state are written.
|
|
*
|
|
* Subsequent records are appended when the first state is issued to
|
|
* a client and when state is revoked for a client.
|
|
*
|
|
* When reading the file in, state issued records that come later in
|
|
* the file override older ones, since the append log is in cronological order.
|
|
* If, for some reason, the file can't be read, the grace period is
|
|
* immediately terminated and all reclaims get NFSERR_NOGRACE.
|
|
*/
|
|
|
|
/*
|
|
* Read in the stable storage file. Called by nfssvc() before the nfsd
|
|
* processes start servicing requests.
|
|
*/
|
|
void
|
|
nfsrv_setupstable(NFSPROC_T *p)
|
|
{
|
|
struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst);
|
|
struct nfsrv_stable *sp, *nsp;
|
|
struct nfst_rec *tsp;
|
|
int error, i, tryagain;
|
|
off_t off = 0;
|
|
ssize_t aresid, len;
|
|
|
|
/*
|
|
* If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without
|
|
* a reboot, so state has not been lost.
|
|
*/
|
|
if (sf->nsf_flags & NFSNSF_UPDATEDONE)
|
|
return;
|
|
/*
|
|
* Set Grace over just until the file reads successfully.
|
|
*/
|
|
NFSD_VNET(nfsrvboottime) = time_second;
|
|
LIST_INIT(&sf->nsf_head);
|
|
sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
|
|
sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA;
|
|
if (sf->nsf_fp == NULL)
|
|
return;
|
|
error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
|
|
(caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE,
|
|
0, NFSFPCRED(sf->nsf_fp), &aresid, p);
|
|
if (error || aresid || sf->nsf_numboots == 0 ||
|
|
sf->nsf_numboots > NFSNSF_MAXNUMBOOTS)
|
|
return;
|
|
|
|
/*
|
|
* Now, read in the boottimes.
|
|
*/
|
|
sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) *
|
|
sizeof(time_t), M_TEMP, M_WAITOK);
|
|
off = sizeof (struct nfsf_rec);
|
|
error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
|
|
(caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off,
|
|
UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
|
|
if (error || aresid) {
|
|
free(sf->nsf_bootvals, M_TEMP);
|
|
sf->nsf_bootvals = NULL;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Make sure this nfsrvboottime is different from all recorded
|
|
* previous ones.
|
|
*/
|
|
do {
|
|
tryagain = 0;
|
|
for (i = 0; i < sf->nsf_numboots; i++) {
|
|
if (NFSD_VNET(nfsrvboottime) == sf->nsf_bootvals[i]) {
|
|
NFSD_VNET(nfsrvboottime)++;
|
|
tryagain = 1;
|
|
break;
|
|
}
|
|
}
|
|
} while (tryagain);
|
|
|
|
sf->nsf_flags |= NFSNSF_OK;
|
|
off += (sf->nsf_numboots * sizeof (time_t));
|
|
|
|
/*
|
|
* Read through the file, building a list of records for grace
|
|
* checking.
|
|
* Each record is between sizeof (struct nfst_rec) and
|
|
* sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1
|
|
* and is actually sizeof (struct nfst_rec) + nst_len - 1.
|
|
*/
|
|
tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
|
|
NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK);
|
|
do {
|
|
error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp),
|
|
(caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1,
|
|
off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p);
|
|
len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid;
|
|
if (error || (len > 0 && (len < sizeof (struct nfst_rec) ||
|
|
len < (sizeof (struct nfst_rec) + tsp->len - 1)))) {
|
|
/*
|
|
* Yuck, the file has been corrupted, so just return
|
|
* after clearing out any restart state, so the grace period
|
|
* is over.
|
|
*/
|
|
LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
|
|
LIST_REMOVE(sp, nst_list);
|
|
free(sp, M_TEMP);
|
|
}
|
|
free(tsp, M_TEMP);
|
|
sf->nsf_flags &= ~NFSNSF_OK;
|
|
free(sf->nsf_bootvals, M_TEMP);
|
|
sf->nsf_bootvals = NULL;
|
|
return;
|
|
}
|
|
if (len > 0) {
|
|
off += sizeof (struct nfst_rec) + tsp->len - 1;
|
|
/*
|
|
* Search the list for a matching client.
|
|
*/
|
|
LIST_FOREACH(sp, &sf->nsf_head, nst_list) {
|
|
if (tsp->len == sp->nst_len &&
|
|
!NFSBCMP(tsp->client, sp->nst_client, tsp->len))
|
|
break;
|
|
}
|
|
if (sp == LIST_END(&sf->nsf_head)) {
|
|
sp = (struct nfsrv_stable *)malloc(tsp->len +
|
|
sizeof (struct nfsrv_stable) - 1, M_TEMP,
|
|
M_WAITOK);
|
|
NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec,
|
|
sizeof (struct nfst_rec) + tsp->len - 1);
|
|
LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list);
|
|
} else {
|
|
if (tsp->flag == NFSNST_REVOKE)
|
|
sp->nst_flag |= NFSNST_REVOKE;
|
|
else
|
|
/*
|
|
* A subsequent timestamp indicates the client
|
|
* did a setclientid/confirm and any previous
|
|
* revoke is no longer relevant.
|
|
*/
|
|
sp->nst_flag &= ~NFSNST_REVOKE;
|
|
}
|
|
}
|
|
} while (len > 0);
|
|
free(tsp, M_TEMP);
|
|
sf->nsf_flags = NFSNSF_OK;
|
|
sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease +
|
|
NFSRV_LEASEDELTA;
|
|
}
|
|
|
|
/*
|
|
* Update the stable storage file, now that the grace period is over.
|
|
*/
|
|
void
|
|
nfsrv_updatestable(NFSPROC_T *p)
|
|
{
|
|
struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst);
|
|
struct nfsrv_stable *sp, *nsp;
|
|
int i;
|
|
struct nfsvattr nva;
|
|
vnode_t vp;
|
|
#if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000)
|
|
mount_t mp = NULL;
|
|
#endif
|
|
int error;
|
|
|
|
if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE))
|
|
return;
|
|
sf->nsf_flags |= NFSNSF_UPDATEDONE;
|
|
/*
|
|
* Ok, we need to rewrite the stable storage file.
|
|
* - truncate to 0 length
|
|
* - write the new first structure
|
|
* - loop through the data structures, writing out any that
|
|
* have timestamps older than the old boot
|
|
*/
|
|
if (sf->nsf_bootvals) {
|
|
sf->nsf_numboots++;
|
|
for (i = sf->nsf_numboots - 2; i >= 0; i--)
|
|
sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i];
|
|
} else {
|
|
sf->nsf_numboots = 1;
|
|
sf->nsf_bootvals = (time_t *)malloc(sizeof(time_t),
|
|
M_TEMP, M_WAITOK);
|
|
}
|
|
sf->nsf_bootvals[0] = NFSD_VNET(nfsrvboottime);
|
|
sf->nsf_lease = nfsrv_lease;
|
|
NFSVNO_ATTRINIT(&nva);
|
|
NFSVNO_SETATTRVAL(&nva, size, 0);
|
|
vp = NFSFPVNODE(sf->nsf_fp);
|
|
vn_start_write(vp, &mp, V_WAIT);
|
|
if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
|
|
error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p,
|
|
NULL);
|
|
NFSVOPUNLOCK(vp);
|
|
} else
|
|
error = EPERM;
|
|
vn_finished_write(mp);
|
|
if (!error)
|
|
error = NFSD_RDWR(UIO_WRITE, vp,
|
|
(caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0,
|
|
UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
|
|
if (!error)
|
|
error = NFSD_RDWR(UIO_WRITE, vp,
|
|
(caddr_t)sf->nsf_bootvals,
|
|
sf->nsf_numboots * sizeof (time_t),
|
|
(off_t)(sizeof (struct nfsf_rec)),
|
|
UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p);
|
|
free(sf->nsf_bootvals, M_TEMP);
|
|
sf->nsf_bootvals = NULL;
|
|
if (error) {
|
|
sf->nsf_flags &= ~NFSNSF_OK;
|
|
printf("EEK! Can't write NfsV4 stable storage file\n");
|
|
return;
|
|
}
|
|
sf->nsf_flags |= NFSNSF_OK;
|
|
|
|
/*
|
|
* Loop through the list and write out timestamp records for
|
|
* any clients that successfully reclaimed state.
|
|
*/
|
|
LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) {
|
|
if (sp->nst_flag & NFSNST_GOTSTATE) {
|
|
nfsrv_writestable(sp->nst_client, sp->nst_len,
|
|
NFSNST_NEWSTATE, p);
|
|
sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE;
|
|
}
|
|
LIST_REMOVE(sp, nst_list);
|
|
free(sp, M_TEMP);
|
|
}
|
|
nfsrv_backupstable();
|
|
}
|
|
|
|
/*
|
|
* Append a record to the stable storage file.
|
|
*/
|
|
void
|
|
nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p)
|
|
{
|
|
struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst);
|
|
struct nfst_rec *sp;
|
|
int error;
|
|
|
|
if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL)
|
|
return;
|
|
sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) +
|
|
len - 1, M_TEMP, M_WAITOK);
|
|
sp->len = len;
|
|
NFSBCOPY(client, sp->client, len);
|
|
sp->flag = flag;
|
|
error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp),
|
|
(caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0,
|
|
UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p);
|
|
free(sp, M_TEMP);
|
|
if (error) {
|
|
sf->nsf_flags &= ~NFSNSF_OK;
|
|
printf("EEK! Can't write NfsV4 stable storage file\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function is called during the grace period to mark a client
|
|
* that successfully reclaimed state.
|
|
*/
|
|
static void
|
|
nfsrv_markstable(struct nfsclient *clp)
|
|
{
|
|
struct nfsrv_stable *sp;
|
|
|
|
/*
|
|
* First find the client structure.
|
|
*/
|
|
LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) {
|
|
if (sp->nst_len == clp->lc_idlen &&
|
|
!NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
|
|
break;
|
|
}
|
|
if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head))
|
|
return;
|
|
|
|
/*
|
|
* Now, just mark it and set the nfsclient back pointer.
|
|
*/
|
|
sp->nst_flag |= NFSNST_GOTSTATE;
|
|
sp->nst_clp = clp;
|
|
}
|
|
|
|
/*
|
|
* This function is called when a NFSv4.1 client does a ReclaimComplete.
|
|
* Very similar to nfsrv_markstable(), except for the flag being set.
|
|
*/
|
|
static void
|
|
nfsrv_markreclaim(struct nfsclient *clp)
|
|
{
|
|
struct nfsrv_stable *sp;
|
|
|
|
/*
|
|
* First find the client structure.
|
|
*/
|
|
LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) {
|
|
if (sp->nst_len == clp->lc_idlen &&
|
|
!NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
|
|
break;
|
|
}
|
|
if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head))
|
|
return;
|
|
|
|
/*
|
|
* Now, just set the flag.
|
|
*/
|
|
sp->nst_flag |= NFSNST_RECLAIMED;
|
|
}
|
|
|
|
/*
|
|
* This function is called for a reclaim, to see if it gets grace.
|
|
* It returns 0 if a reclaim is allowed, 1 otherwise.
|
|
*/
|
|
static int
|
|
nfsrv_checkstable(struct nfsclient *clp)
|
|
{
|
|
struct nfsrv_stable *sp;
|
|
|
|
/*
|
|
* First, find the entry for the client.
|
|
*/
|
|
LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) {
|
|
if (sp->nst_len == clp->lc_idlen &&
|
|
!NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If not in the list, state was revoked or no state was issued
|
|
* since the previous reboot, a reclaim is denied.
|
|
*/
|
|
if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head) ||
|
|
(sp->nst_flag & NFSNST_REVOKE) ||
|
|
!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_OK))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Test for and try to clear out a conflicting client. This is called by
|
|
* nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients
|
|
* a found.
|
|
* The trick here is that it can't revoke a conflicting client with an
|
|
* expired lease unless it holds the v4root lock, so...
|
|
* If no v4root lock, get the lock and return 1 to indicate "try again".
|
|
* Return 0 to indicate the conflict can't be revoked and 1 to indicate
|
|
* the revocation worked and the conflicting client is "bye, bye", so it
|
|
* can be tried again.
|
|
* Return 2 to indicate that the vnode is VIRF_DOOMED after NFSVOPLOCK().
|
|
* Unlocks State before a non-zero value is returned.
|
|
*/
|
|
static int
|
|
nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp,
|
|
NFSPROC_T *p)
|
|
{
|
|
int gotlock, lktype = 0;
|
|
|
|
/*
|
|
* If lease hasn't expired, we can't fix it.
|
|
*/
|
|
if (clp->lc_expiry >= NFSD_MONOSEC ||
|
|
!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE))
|
|
return (0);
|
|
if (*haslockp == 0) {
|
|
NFSUNLOCKSTATE();
|
|
if (vp != NULL) {
|
|
lktype = NFSVOPISLOCKED(vp);
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
do {
|
|
gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (!gotlock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
*haslockp = 1;
|
|
if (vp != NULL) {
|
|
NFSVOPLOCK(vp, lktype | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp))
|
|
return (2);
|
|
}
|
|
return (1);
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
|
|
/*
|
|
* Ok, we can expire the conflicting client.
|
|
*/
|
|
nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
|
|
nfsrv_backupstable();
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
LIST_REMOVE(clp, lc_hash);
|
|
nfsrv_zapclient(clp, p);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Resolve a delegation conflict.
|
|
* Returns 0 to indicate the conflict was resolved without sleeping.
|
|
* Return -1 to indicate that the caller should check for conflicts again.
|
|
* Return > 0 for an error that should be returned, normally NFSERR_DELAY.
|
|
*
|
|
* Also, manipulate the nfsv4root_lock, as required. It isn't changed
|
|
* for a return of 0, since there was no sleep and it could be required
|
|
* later. It is released for a return of NFSERR_DELAY, since the caller
|
|
* will return that error. It is released when a sleep was done waiting
|
|
* for the delegation to be returned or expire (so that other nfsds can
|
|
* handle ops). Then, it must be acquired for the write to stable storage.
|
|
* (This function is somewhat similar to nfsrv_clientconflict(), but
|
|
* the semantics differ in a couple of subtle ways. The return of 0
|
|
* indicates the conflict was resolved without sleeping here, not
|
|
* that the conflict can't be resolved and the handling of nfsv4root_lock
|
|
* differs, as noted above.)
|
|
* Unlocks State before returning a non-zero value.
|
|
*/
|
|
static int
|
|
nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p,
|
|
vnode_t vp)
|
|
{
|
|
struct nfsclient *clp = stp->ls_clp;
|
|
int gotlock, error, lktype = 0, retrycnt, zapped_clp;
|
|
nfsv4stateid_t tstateid;
|
|
fhandle_t tfh;
|
|
|
|
/*
|
|
* If the conflict is with an old delegation...
|
|
*/
|
|
if (stp->ls_flags & NFSLCK_OLDDELEG) {
|
|
/*
|
|
* You can delete it, if it has expired.
|
|
*/
|
|
if (clp->lc_delegtime < NFSD_MONOSEC) {
|
|
nfsrv_freedeleg(stp);
|
|
NFSUNLOCKSTATE();
|
|
error = -1;
|
|
goto out;
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
/*
|
|
* During this delay, the old delegation could expire or it
|
|
* could be recovered by the client via an Open with
|
|
* CLAIM_DELEGATE_PREV.
|
|
* Release the nfsv4root_lock, if held.
|
|
*/
|
|
if (*haslockp) {
|
|
*haslockp = 0;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
error = NFSERR_DELAY;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* It's a current delegation, so:
|
|
* - check to see if the delegation has expired
|
|
* - if so, get the v4root lock and then expire it
|
|
*/
|
|
if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0 || (stp->ls_lastrecall <
|
|
NFSD_MONOSEC && clp->lc_expiry >= NFSD_MONOSEC &&
|
|
stp->ls_delegtime >= NFSD_MONOSEC)) {
|
|
/*
|
|
* - do a recall callback, since not yet done
|
|
* For now, never allow truncate to be set. To use
|
|
* truncate safely, it must be guaranteed that the
|
|
* Remove, Rename or Setattr with size of 0 will
|
|
* succeed and that would require major changes to
|
|
* the VFS/Vnode OPs.
|
|
* Set the expiry time large enough so that it won't expire
|
|
* until after the callback, then set it correctly, once
|
|
* the callback is done. (The delegation will now time
|
|
* out whether or not the Recall worked ok. The timeout
|
|
* will be extended when ops are done on the delegation
|
|
* stateid, up to the timelimit.)
|
|
*/
|
|
if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) {
|
|
stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) +
|
|
NFSRV_LEASEDELTA;
|
|
stp->ls_delegtimelimit = NFSD_MONOSEC + (6 *
|
|
nfsrv_lease) + NFSRV_LEASEDELTA;
|
|
stp->ls_flags |= NFSLCK_DELEGRECALL;
|
|
}
|
|
stp->ls_lastrecall = time_uptime + 1;
|
|
|
|
/*
|
|
* Loop NFSRV_CBRETRYCNT times while the CBRecall replies
|
|
* NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done
|
|
* in order to try and avoid a race that could happen
|
|
* when a CBRecall request passed the Open reply with
|
|
* the delegation in it when transitting the network.
|
|
* Since nfsrv_docallback will sleep, don't use stp after
|
|
* the call.
|
|
*/
|
|
NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid,
|
|
sizeof (tstateid));
|
|
NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh,
|
|
sizeof (tfh));
|
|
NFSUNLOCKSTATE();
|
|
if (*haslockp) {
|
|
*haslockp = 0;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
retrycnt = 0;
|
|
do {
|
|
error = nfsrv_docallback(clp, NFSV4OP_CBRECALL,
|
|
&tstateid, 0, &tfh, NULL, NULL, 0, p);
|
|
retrycnt++;
|
|
} while ((error == NFSERR_BADSTATEID ||
|
|
error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT);
|
|
error = NFSERR_DELAY;
|
|
goto out;
|
|
}
|
|
|
|
if (clp->lc_expiry >= NFSD_MONOSEC &&
|
|
stp->ls_delegtime >= NFSD_MONOSEC) {
|
|
NFSUNLOCKSTATE();
|
|
/*
|
|
* A recall has been done, but it has not yet expired.
|
|
* So, RETURN_DELAY.
|
|
*/
|
|
if (*haslockp) {
|
|
*haslockp = 0;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
error = NFSERR_DELAY;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If we don't yet have the lock, just get it and then return,
|
|
* since we need that before deleting expired state, such as
|
|
* this delegation.
|
|
* When getting the lock, unlock the vnode, so other nfsds that
|
|
* are in progress, won't get stuck waiting for the vnode lock.
|
|
*/
|
|
if (*haslockp == 0) {
|
|
NFSUNLOCKSTATE();
|
|
if (vp != NULL) {
|
|
lktype = NFSVOPISLOCKED(vp);
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
do {
|
|
gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (!gotlock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
*haslockp = 1;
|
|
if (vp != NULL) {
|
|
NFSVOPLOCK(vp, lktype | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp)) {
|
|
*haslockp = 0;
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = NFSERR_PERM;
|
|
goto out;
|
|
}
|
|
}
|
|
error = -1;
|
|
goto out;
|
|
}
|
|
|
|
NFSUNLOCKSTATE();
|
|
/*
|
|
* Ok, we can delete the expired delegation.
|
|
* First, write the Revoke record to stable storage and then
|
|
* clear out the conflict.
|
|
* Since all other nfsd threads are now blocked, we can safely
|
|
* sleep without the state changing.
|
|
*/
|
|
nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p);
|
|
nfsrv_backupstable();
|
|
if (clp->lc_expiry < NFSD_MONOSEC) {
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
LIST_REMOVE(clp, lc_hash);
|
|
zapped_clp = 1;
|
|
} else {
|
|
nfsrv_freedeleg(stp);
|
|
zapped_clp = 0;
|
|
}
|
|
if (zapped_clp)
|
|
nfsrv_zapclient(clp, p);
|
|
error = -1;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check for a remove allowed, if remove is set to 1 and get rid of
|
|
* delegations.
|
|
*/
|
|
int
|
|
nfsrv_checkremove(vnode_t vp, int remove, struct nfsrv_descript *nd,
|
|
nfsquad_t clientid, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfsstate *stp;
|
|
struct nfslockfile *lfp;
|
|
int error, haslock = 0;
|
|
fhandle_t nfh;
|
|
|
|
clp = NULL;
|
|
/*
|
|
* First, get the lock file structure.
|
|
* (A return of -1 means no associated state, so remove ok.)
|
|
*/
|
|
error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
|
|
tryagain:
|
|
NFSLOCKSTATE();
|
|
if (error == 0 && clientid.qval != 0)
|
|
error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL,
|
|
(nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (!error)
|
|
error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
if (error == -1)
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, we must Recall any delegations.
|
|
*/
|
|
error = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p);
|
|
if (error) {
|
|
/*
|
|
* nfsrv_cleandeleg() unlocks state for non-zero
|
|
* return.
|
|
*/
|
|
if (error == -1)
|
|
goto tryagain;
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, look for a conflicting open share.
|
|
*/
|
|
if (remove) {
|
|
/*
|
|
* If the entry in the directory was the last reference to the
|
|
* corresponding filesystem object, the object can be destroyed
|
|
* */
|
|
if(lfp->lf_usecount>1)
|
|
LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
|
|
if (stp->ls_flags & NFSLCK_WRITEDENY) {
|
|
error = NFSERR_FILEOPEN;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
NFSUNLOCKSTATE();
|
|
if (haslock) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Clear out all delegations for the file referred to by lfp.
|
|
* May return NFSERR_DELAY, if there will be a delay waiting for
|
|
* delegations to expire.
|
|
* Returns -1 to indicate it slept while recalling a delegation.
|
|
* This function has the side effect of deleting the nfslockfile structure,
|
|
* if it no longer has associated state and didn't have to sleep.
|
|
* Unlocks State before a non-zero value is returned.
|
|
*/
|
|
static int
|
|
nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp,
|
|
struct nfsclient *clp, int *haslockp, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *stp, *nstp;
|
|
int ret = 0;
|
|
|
|
stp = LIST_FIRST(&lfp->lf_deleg);
|
|
while (stp != LIST_END(&lfp->lf_deleg)) {
|
|
nstp = LIST_NEXT(stp, ls_file);
|
|
if (stp->ls_clp != clp) {
|
|
ret = nfsrv_delegconflict(stp, haslockp, p, vp);
|
|
if (ret) {
|
|
/*
|
|
* nfsrv_delegconflict() unlocks state
|
|
* when it returns non-zero.
|
|
*/
|
|
goto out;
|
|
}
|
|
}
|
|
stp = nstp;
|
|
}
|
|
out:
|
|
NFSEXITCODE(ret);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* There are certain operations that, when being done outside of NFSv4,
|
|
* require that any NFSv4 delegation for the file be recalled.
|
|
* This function is to be called for those cases:
|
|
* VOP_RENAME() - When a delegation is being recalled for any reason,
|
|
* the client may have to do Opens against the server, using the file's
|
|
* final component name. If the file has been renamed on the server,
|
|
* that component name will be incorrect and the Open will fail.
|
|
* VOP_REMOVE() - Theoretically, a client could Open a file after it has
|
|
* been removed on the server, if there is a delegation issued to
|
|
* that client for the file. I say "theoretically" since clients
|
|
* normally do an Access Op before the Open and that Access Op will
|
|
* fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so
|
|
* they will detect the file's removal in the same manner. (There is
|
|
* one case where RFC3530 allows a client to do an Open without first
|
|
* doing an Access Op, which is passage of a check against the ACE
|
|
* returned with a Write delegation, but current practice is to ignore
|
|
* the ACE and always do an Access Op.)
|
|
* Since the functions can only be called with an unlocked vnode, this
|
|
* can't be done at this time.
|
|
* VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range
|
|
* locks locally in the client, which are not visible to the server. To
|
|
* deal with this, issuing of delegations for a vnode must be disabled
|
|
* and all delegations for the vnode recalled. This is done via the
|
|
* second function, using the VV_DISABLEDELEG vflag on the vnode.
|
|
*/
|
|
void
|
|
nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
|
|
{
|
|
time_t starttime;
|
|
int error;
|
|
|
|
/*
|
|
* First, check to see if the server is currently running and it has
|
|
* been called for a regular file when issuing delegations.
|
|
*/
|
|
if (NFSD_VNET(nfsrv_numnfsd) == 0 || vp->v_type != VREG ||
|
|
nfsrv_issuedelegs == 0)
|
|
return;
|
|
|
|
KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp));
|
|
/*
|
|
* First, get a reference on the nfsv4rootfs_lock so that an
|
|
* exclusive lock cannot be acquired by another thread.
|
|
*/
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
/*
|
|
* Now, call nfsrv_checkremove() in a loop while it returns
|
|
* NFSERR_DELAY. Return upon any other error or when timed out.
|
|
*/
|
|
starttime = NFSD_MONOSEC;
|
|
do {
|
|
if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) {
|
|
error = nfsrv_checkremove(vp, 0, NULL,
|
|
(nfsquad_t)((u_quad_t)0), p);
|
|
NFSVOPUNLOCK(vp);
|
|
} else
|
|
error = EPERM;
|
|
if (error == NFSERR_DELAY) {
|
|
if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO)
|
|
break;
|
|
/* Sleep for a short period of time */
|
|
(void) nfs_catnap(PZERO, 0, "nfsremove");
|
|
}
|
|
} while (error == NFSERR_DELAY);
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
}
|
|
|
|
void
|
|
nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p)
|
|
{
|
|
|
|
#ifdef VV_DISABLEDELEG
|
|
/*
|
|
* First, flag issuance of delegations disabled.
|
|
*/
|
|
atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG);
|
|
#endif
|
|
|
|
/*
|
|
* Then call nfsd_recalldelegation() to get rid of all extant
|
|
* delegations.
|
|
*/
|
|
nfsd_recalldelegation(vp, p);
|
|
}
|
|
|
|
/*
|
|
* Check for conflicting locks, etc. and then get rid of delegations.
|
|
* (At one point I thought that I should get rid of delegations for any
|
|
* Setattr, since it could potentially disallow the I/O op (read or write)
|
|
* allowed by the delegation. However, Setattr Ops that aren't changing
|
|
* the size get a stateid of all 0s, so you can't tell if it is a delegation
|
|
* for the same client or a different one, so I decided to only get rid
|
|
* of delegations for other clients when the size is being changed.)
|
|
* In general, a Setattr can disable NFS I/O Ops that are outstanding, such
|
|
* as Write backs, even if there is no delegation, so it really isn't any
|
|
* different?)
|
|
*/
|
|
int
|
|
nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd,
|
|
nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp,
|
|
struct nfsexstuff *exp, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate st, *stp = &st;
|
|
struct nfslock lo, *lop = &lo;
|
|
int error = 0;
|
|
nfsquad_t clientid;
|
|
|
|
if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) {
|
|
stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
|
|
lop->lo_first = nvap->na_size;
|
|
} else {
|
|
stp->ls_flags = 0;
|
|
lop->lo_first = 0;
|
|
}
|
|
if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) ||
|
|
NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) ||
|
|
NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) ||
|
|
NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL))
|
|
stp->ls_flags |= NFSLCK_SETATTR;
|
|
if (stp->ls_flags == 0)
|
|
goto out;
|
|
lop->lo_end = NFS64BITSSET;
|
|
lop->lo_flags = NFSLCK_WRITE;
|
|
stp->ls_ownerlen = 0;
|
|
stp->ls_op = NULL;
|
|
stp->ls_uid = nd->nd_cred->cr_uid;
|
|
stp->ls_stateid.seqid = stateidp->seqid;
|
|
clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0];
|
|
clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1];
|
|
stp->ls_stateid.other[2] = stateidp->other[2];
|
|
error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
|
|
stateidp, exp, nd, p);
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check for a write delegation and do a CBGETATTR if there is one, updating
|
|
* the attributes, as required.
|
|
* Should I return an error if I can't get the attributes? (For now, I'll
|
|
* just return ok.
|
|
*/
|
|
int
|
|
nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp,
|
|
struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p)
|
|
{
|
|
struct nfsstate *stp;
|
|
struct nfslockfile *lfp;
|
|
struct nfsclient *clp;
|
|
struct nfsvattr nva;
|
|
fhandle_t nfh;
|
|
int error = 0;
|
|
nfsattrbit_t cbbits;
|
|
u_quad_t delegfilerev;
|
|
|
|
NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits);
|
|
if (!NFSNONZERO_ATTRBIT(&cbbits))
|
|
goto out;
|
|
if (nfsrv_writedelegcnt == 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Get the lock file structure.
|
|
* (A return of -1 means no associated state, so return ok.)
|
|
*/
|
|
error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p);
|
|
NFSLOCKSTATE();
|
|
if (!error)
|
|
error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0);
|
|
if (error) {
|
|
NFSUNLOCKSTATE();
|
|
if (error == -1)
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, look for a write delegation.
|
|
*/
|
|
LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
|
|
if (stp->ls_flags & NFSLCK_DELEGWRITE)
|
|
break;
|
|
}
|
|
if (stp == LIST_END(&lfp->lf_deleg)) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
clp = stp->ls_clp;
|
|
|
|
/* If the clientid is not confirmed, ignore the delegation. */
|
|
if (clp->lc_flags & LCL_NEEDSCONFIRM) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
delegfilerev = stp->ls_filerev;
|
|
/*
|
|
* If the Write delegation was issued as a part of this Compound RPC
|
|
* or if we have an Implied Clientid (used in a previous Op in this
|
|
* compound) and it is the client the delegation was issued to,
|
|
* just return ok.
|
|
* I also assume that it is from the same client iff the network
|
|
* host IP address is the same as the callback address. (Not
|
|
* exactly correct by the RFC, but avoids a lot of Getattr
|
|
* callbacks.)
|
|
*/
|
|
if (nd->nd_compref == stp->ls_compref ||
|
|
((nd->nd_flag & ND_IMPLIEDCLID) &&
|
|
clp->lc_clientid.qval == nd->nd_clientid.qval) ||
|
|
nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) {
|
|
NFSUNLOCKSTATE();
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We are now done with the delegation state structure,
|
|
* so the statelock can be released and we can now tsleep().
|
|
*/
|
|
|
|
/*
|
|
* Now, we must do the CB Getattr callback, to see if Change or Size
|
|
* has changed.
|
|
*/
|
|
if (clp->lc_expiry >= NFSD_MONOSEC) {
|
|
NFSUNLOCKSTATE();
|
|
NFSVNO_ATTRINIT(&nva);
|
|
nva.na_filerev = NFS64BITSSET;
|
|
error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL,
|
|
0, &nfh, &nva, &cbbits, 0, p);
|
|
if (!error) {
|
|
if ((nva.na_filerev != NFS64BITSSET &&
|
|
nva.na_filerev > delegfilerev) ||
|
|
(NFSVNO_ISSETSIZE(&nva) &&
|
|
nva.na_size != nvap->na_size)) {
|
|
error = nfsvno_updfilerev(vp, nvap, nd, p);
|
|
if (NFSVNO_ISSETSIZE(&nva))
|
|
nvap->na_size = nva.na_size;
|
|
}
|
|
} else
|
|
error = 0; /* Ignore callback errors for now. */
|
|
} else {
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This function looks for openowners that haven't had any opens for
|
|
* a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS
|
|
* is set.
|
|
*/
|
|
void
|
|
nfsrv_throwawayopens(NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp, *nclp;
|
|
struct nfsstate *stp, *nstp;
|
|
int i;
|
|
|
|
NFSLOCKSTATE();
|
|
NFSD_VNET(nfsrv_stablefirst).nsf_flags &= ~NFSNSF_NOOPENS;
|
|
/*
|
|
* For each client...
|
|
*/
|
|
for (i = 0; i < nfsrv_clienthashsize; i++) {
|
|
LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash,
|
|
nclp) {
|
|
LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) {
|
|
if (LIST_EMPTY(&stp->ls_open) &&
|
|
(stp->ls_noopens > NFSNOOPEN ||
|
|
(nfsrv_openpluslock * 2) >
|
|
nfsrv_v4statelimit))
|
|
nfsrv_freeopenowner(stp, 0, p);
|
|
}
|
|
}
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
}
|
|
|
|
/*
|
|
* This function checks to see if the credentials are the same.
|
|
* The check for same credentials is needed for state management operations
|
|
* for NFSv4.0 or NFSv4.1/4.2 when SP4_MACH_CRED is configured via
|
|
* ExchangeID.
|
|
* Returns 1 for not same, 0 otherwise.
|
|
*/
|
|
static int
|
|
nfsrv_notsamecredname(int op, struct nfsrv_descript *nd, struct nfsclient *clp)
|
|
{
|
|
|
|
/* Check for the SP4_MACH_CRED case. */
|
|
if (op != 0 && nfsrv_checkmachcred(op, nd, clp) != 0)
|
|
return (1);
|
|
|
|
/* For NFSv4.1/4.2, SP4_NONE always allows this. */
|
|
if ((nd->nd_flag & ND_NFSV41) != 0)
|
|
return (0);
|
|
|
|
if (nd->nd_flag & ND_GSS) {
|
|
if (!(clp->lc_flags & LCL_GSS))
|
|
return (1);
|
|
if (clp->lc_flags & LCL_NAME) {
|
|
if (nd->nd_princlen != clp->lc_namelen ||
|
|
NFSBCMP(nd->nd_principal, clp->lc_name,
|
|
clp->lc_namelen))
|
|
return (1);
|
|
else
|
|
return (0);
|
|
}
|
|
if (nd->nd_cred->cr_uid == clp->lc_uid)
|
|
return (0);
|
|
else
|
|
return (1);
|
|
} else if (clp->lc_flags & LCL_GSS)
|
|
return (1);
|
|
/*
|
|
* For AUTH_SYS, allow the same uid or root. (This is underspecified
|
|
* in RFC3530, which talks about principals, but doesn't say anything
|
|
* about uids for AUTH_SYS.)
|
|
*/
|
|
if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0)
|
|
return (0);
|
|
else
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Calculate the lease expiry time.
|
|
*/
|
|
static time_t
|
|
nfsrv_leaseexpiry(void)
|
|
{
|
|
|
|
if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce > NFSD_MONOSEC)
|
|
return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA));
|
|
return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA);
|
|
}
|
|
|
|
/*
|
|
* Delay the delegation timeout as far as ls_delegtimelimit, as required.
|
|
*/
|
|
static void
|
|
nfsrv_delaydelegtimeout(struct nfsstate *stp)
|
|
{
|
|
|
|
if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0)
|
|
return;
|
|
|
|
if ((stp->ls_delegtime + 15) > NFSD_MONOSEC &&
|
|
stp->ls_delegtime < stp->ls_delegtimelimit) {
|
|
stp->ls_delegtime += nfsrv_lease;
|
|
if (stp->ls_delegtime > stp->ls_delegtimelimit)
|
|
stp->ls_delegtime = stp->ls_delegtimelimit;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function checks to see if there is any other state associated
|
|
* with the openowner for this Open.
|
|
* It returns 1 if there is no other state, 0 otherwise.
|
|
*/
|
|
static int
|
|
nfsrv_nootherstate(struct nfsstate *stp)
|
|
{
|
|
struct nfsstate *tstp;
|
|
|
|
LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) {
|
|
if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock))
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Create a list of lock deltas (changes to local byte range locking
|
|
* that can be rolled back using the list) and apply the changes via
|
|
* nfsvno_advlock(). Optionally, lock the list. It is expected that either
|
|
* the rollback or update function will be called after this.
|
|
* It returns an error (and rolls back, as required), if any nfsvno_advlock()
|
|
* call fails. If it returns an error, it will unlock the list.
|
|
*/
|
|
static int
|
|
nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags,
|
|
uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
|
|
{
|
|
struct nfslock *lop, *nlop;
|
|
int error = 0;
|
|
|
|
/* Loop through the list of locks. */
|
|
lop = LIST_FIRST(&lfp->lf_locallock);
|
|
while (first < end && lop != NULL) {
|
|
nlop = LIST_NEXT(lop, lo_lckowner);
|
|
if (first >= lop->lo_end) {
|
|
/* not there yet */
|
|
lop = nlop;
|
|
} else if (first < lop->lo_first) {
|
|
/* new one starts before entry in list */
|
|
if (end <= lop->lo_first) {
|
|
/* no overlap between old and new */
|
|
error = nfsrv_dolocal(vp, lfp, flags,
|
|
NFSLCK_UNLOCK, first, end, cfp, p);
|
|
if (error != 0)
|
|
break;
|
|
first = end;
|
|
} else {
|
|
/* handle fragment overlapped with new one */
|
|
error = nfsrv_dolocal(vp, lfp, flags,
|
|
NFSLCK_UNLOCK, first, lop->lo_first, cfp,
|
|
p);
|
|
if (error != 0)
|
|
break;
|
|
first = lop->lo_first;
|
|
}
|
|
} else {
|
|
/* new one overlaps this entry in list */
|
|
if (end <= lop->lo_end) {
|
|
/* overlaps all of new one */
|
|
error = nfsrv_dolocal(vp, lfp, flags,
|
|
lop->lo_flags, first, end, cfp, p);
|
|
if (error != 0)
|
|
break;
|
|
first = end;
|
|
} else {
|
|
/* handle fragment overlapped with new one */
|
|
error = nfsrv_dolocal(vp, lfp, flags,
|
|
lop->lo_flags, first, lop->lo_end, cfp, p);
|
|
if (error != 0)
|
|
break;
|
|
first = lop->lo_end;
|
|
lop = nlop;
|
|
}
|
|
}
|
|
}
|
|
if (first < end && error == 0)
|
|
/* handle fragment past end of list */
|
|
error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first,
|
|
end, cfp, p);
|
|
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Local lock unlock. Unlock all byte ranges that are no longer locked
|
|
* by NFSv4. To do this, unlock any subranges of first-->end that
|
|
* do not overlap with the byte ranges of any lock in the lfp->lf_lock
|
|
* list. This list has all locks for the file held by other
|
|
* <clientid, lockowner> tuples. The list is ordered by increasing
|
|
* lo_first value, but may have entries that overlap each other, for
|
|
* the case of read locks.
|
|
*/
|
|
static void
|
|
nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first,
|
|
uint64_t init_end, NFSPROC_T *p)
|
|
{
|
|
struct nfslock *lop;
|
|
uint64_t first, end, prevfirst __unused;
|
|
|
|
first = init_first;
|
|
end = init_end;
|
|
while (first < init_end) {
|
|
/* Loop through all nfs locks, adjusting first and end */
|
|
prevfirst = 0;
|
|
LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) {
|
|
KASSERT(prevfirst <= lop->lo_first,
|
|
("nfsv4 locks out of order"));
|
|
KASSERT(lop->lo_first < lop->lo_end,
|
|
("nfsv4 bogus lock"));
|
|
prevfirst = lop->lo_first;
|
|
if (first >= lop->lo_first &&
|
|
first < lop->lo_end)
|
|
/*
|
|
* Overlaps with initial part, so trim
|
|
* off that initial part by moving first past
|
|
* it.
|
|
*/
|
|
first = lop->lo_end;
|
|
else if (end > lop->lo_first &&
|
|
lop->lo_first > first) {
|
|
/*
|
|
* This lock defines the end of the
|
|
* segment to unlock, so set end to the
|
|
* start of it and break out of the loop.
|
|
*/
|
|
end = lop->lo_first;
|
|
break;
|
|
}
|
|
if (first >= end)
|
|
/*
|
|
* There is no segment left to do, so
|
|
* break out of this loop and then exit
|
|
* the outer while() since first will be set
|
|
* to end, which must equal init_end here.
|
|
*/
|
|
break;
|
|
}
|
|
if (first < end) {
|
|
/* Unlock this segment */
|
|
(void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK,
|
|
NFSLCK_READ, first, end, NULL, p);
|
|
nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK,
|
|
first, end);
|
|
}
|
|
/*
|
|
* Now move past this segment and look for any further
|
|
* segment in the range, if there is one.
|
|
*/
|
|
first = end;
|
|
end = init_end;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do the local lock operation and update the rollback list, as required.
|
|
* Perform the rollback and return the error if nfsvno_advlock() fails.
|
|
*/
|
|
static int
|
|
nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags,
|
|
uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p)
|
|
{
|
|
struct nfsrollback *rlp;
|
|
int error = 0, ltype, oldltype;
|
|
|
|
if (flags & NFSLCK_WRITE)
|
|
ltype = F_WRLCK;
|
|
else if (flags & NFSLCK_READ)
|
|
ltype = F_RDLCK;
|
|
else
|
|
ltype = F_UNLCK;
|
|
if (oldflags & NFSLCK_WRITE)
|
|
oldltype = F_WRLCK;
|
|
else if (oldflags & NFSLCK_READ)
|
|
oldltype = F_RDLCK;
|
|
else
|
|
oldltype = F_UNLCK;
|
|
if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK))
|
|
/* nothing to do */
|
|
goto out;
|
|
error = nfsvno_advlock(vp, ltype, first, end, p);
|
|
if (error != 0) {
|
|
if (cfp != NULL) {
|
|
cfp->cl_clientid.lval[0] = 0;
|
|
cfp->cl_clientid.lval[1] = 0;
|
|
cfp->cl_first = 0;
|
|
cfp->cl_end = NFS64BITSSET;
|
|
cfp->cl_flags = NFSLCK_WRITE;
|
|
cfp->cl_ownerlen = 5;
|
|
NFSBCOPY("LOCAL", cfp->cl_owner, 5);
|
|
}
|
|
nfsrv_locallock_rollback(vp, lfp, p);
|
|
} else if (ltype != F_UNLCK) {
|
|
rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK,
|
|
M_WAITOK);
|
|
rlp->rlck_first = first;
|
|
rlp->rlck_end = end;
|
|
rlp->rlck_type = oldltype;
|
|
LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list);
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Roll back local lock changes and free up the rollback list.
|
|
*/
|
|
static void
|
|
nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p)
|
|
{
|
|
struct nfsrollback *rlp, *nrlp;
|
|
|
|
LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) {
|
|
(void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first,
|
|
rlp->rlck_end, p);
|
|
free(rlp, M_NFSDROLLBACK);
|
|
}
|
|
LIST_INIT(&lfp->lf_rollback);
|
|
}
|
|
|
|
/*
|
|
* Update local lock list and delete rollback list (ie now committed to the
|
|
* local locks). Most of the work is done by the internal function.
|
|
*/
|
|
static void
|
|
nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first,
|
|
uint64_t end)
|
|
{
|
|
struct nfsrollback *rlp, *nrlp;
|
|
struct nfslock *new_lop, *other_lop;
|
|
|
|
new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK);
|
|
if (flags & (NFSLCK_READ | NFSLCK_WRITE))
|
|
other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK,
|
|
M_WAITOK);
|
|
else
|
|
other_lop = NULL;
|
|
new_lop->lo_flags = flags;
|
|
new_lop->lo_first = first;
|
|
new_lop->lo_end = end;
|
|
nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp);
|
|
if (new_lop != NULL)
|
|
free(new_lop, M_NFSDLOCK);
|
|
if (other_lop != NULL)
|
|
free(other_lop, M_NFSDLOCK);
|
|
|
|
/* and get rid of the rollback list */
|
|
LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp)
|
|
free(rlp, M_NFSDROLLBACK);
|
|
LIST_INIT(&lfp->lf_rollback);
|
|
}
|
|
|
|
/*
|
|
* Lock the struct nfslockfile for local lock updating.
|
|
*/
|
|
static void
|
|
nfsrv_locklf(struct nfslockfile *lfp)
|
|
{
|
|
int gotlock;
|
|
|
|
/* lf_usecount ensures *lfp won't be free'd */
|
|
lfp->lf_usecount++;
|
|
do {
|
|
gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL,
|
|
NFSSTATEMUTEXPTR, NULL);
|
|
} while (gotlock == 0);
|
|
lfp->lf_usecount--;
|
|
}
|
|
|
|
/*
|
|
* Unlock the struct nfslockfile after local lock updating.
|
|
*/
|
|
static void
|
|
nfsrv_unlocklf(struct nfslockfile *lfp)
|
|
{
|
|
|
|
nfsv4_unlock(&lfp->lf_locallock_lck, 0);
|
|
}
|
|
|
|
/*
|
|
* Clear out all state for the NFSv4 server.
|
|
* Must be called by a thread that can sleep when no nfsds are running.
|
|
*/
|
|
void
|
|
nfsrv_throwawayallstate(NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp, *nclp;
|
|
struct nfslockfile *lfp, *nlfp;
|
|
int i;
|
|
|
|
/*
|
|
* For each client, clean out the state and then free the structure.
|
|
*/
|
|
for (i = 0; i < nfsrv_clienthashsize; i++) {
|
|
LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash,
|
|
nclp) {
|
|
nfsrv_cleanclient(clp, p);
|
|
nfsrv_freedeleglist(&clp->lc_deleg);
|
|
nfsrv_freedeleglist(&clp->lc_olddeleg);
|
|
free(clp->lc_stateid, M_NFSDCLIENT);
|
|
free(clp, M_NFSDCLIENT);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Also, free up any remaining lock file structures.
|
|
*/
|
|
for (i = 0; i < nfsrv_lockhashsize; i++) {
|
|
LIST_FOREACH_SAFE(lfp, &NFSD_VNET(nfslockhash)[i], lf_hash,
|
|
nlfp) {
|
|
printf("nfsd unload: fnd a lock file struct\n");
|
|
nfsrv_freenfslockfile(lfp);
|
|
}
|
|
}
|
|
|
|
/* And get rid of the deviceid structures and layouts. */
|
|
nfsrv_freealllayoutsanddevids();
|
|
}
|
|
|
|
/*
|
|
* Check the sequence# for the session and slot provided as an argument.
|
|
* Also, renew the lease if the session will return NFS_OK.
|
|
*/
|
|
int
|
|
nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid,
|
|
uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this,
|
|
uint32_t *sflagsp, NFSPROC_T *p)
|
|
{
|
|
struct nfsdsession *sep;
|
|
struct nfssessionhash *shp;
|
|
int error;
|
|
|
|
shp = NFSSESSIONHASH(nd->nd_sessionid);
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(nd->nd_sessionid);
|
|
if (sep == NULL) {
|
|
NFSUNLOCKSESSION(shp);
|
|
return (NFSERR_BADSESSION);
|
|
}
|
|
error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp,
|
|
sep->sess_slots, NULL, NFSV4_SLOTS - 1);
|
|
if (error != 0) {
|
|
NFSUNLOCKSESSION(shp);
|
|
return (error);
|
|
}
|
|
if (cache_this != 0)
|
|
nd->nd_flag |= ND_SAVEREPLY;
|
|
/* Renew the lease. */
|
|
sep->sess_clp->lc_expiry = nfsrv_leaseexpiry();
|
|
nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval;
|
|
nd->nd_flag |= ND_IMPLIEDCLID;
|
|
|
|
/* Handle the SP4_MECH_CRED case for NFSv4.1/4.2. */
|
|
if ((sep->sess_clp->lc_flags & LCL_MACHCRED) != 0 &&
|
|
(nd->nd_flag & (ND_GSSINTEGRITY | ND_GSSPRIVACY)) != 0 &&
|
|
nd->nd_princlen == sep->sess_clp->lc_namelen &&
|
|
!NFSBCMP(sep->sess_clp->lc_name, nd->nd_principal,
|
|
nd->nd_princlen)) {
|
|
nd->nd_flag |= ND_MACHCRED;
|
|
NFSSET_OPBIT(&nd->nd_allowops, &sep->sess_clp->lc_allowops);
|
|
}
|
|
|
|
/* Save maximum request and reply sizes. */
|
|
nd->nd_maxreq = sep->sess_maxreq;
|
|
nd->nd_maxresp = sep->sess_maxresp;
|
|
|
|
*sflagsp = 0;
|
|
if (sep->sess_clp->lc_req.nr_client == NULL ||
|
|
(sep->sess_clp->lc_flags & LCL_CBDOWN) != 0)
|
|
*sflagsp |= NFSV4SEQ_CBPATHDOWN;
|
|
NFSUNLOCKSESSION(shp);
|
|
if (error == NFSERR_EXPIRED) {
|
|
*sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED;
|
|
error = 0;
|
|
} else if (error == NFSERR_ADMINREVOKED) {
|
|
*sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED;
|
|
error = 0;
|
|
}
|
|
*highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check/set reclaim complete for this session/clientid.
|
|
*/
|
|
int
|
|
nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs)
|
|
{
|
|
struct nfsdsession *sep;
|
|
struct nfssessionhash *shp;
|
|
int error = 0;
|
|
|
|
shp = NFSSESSIONHASH(nd->nd_sessionid);
|
|
NFSLOCKSTATE();
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(nd->nd_sessionid);
|
|
if (sep == NULL) {
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
return (NFSERR_BADSESSION);
|
|
}
|
|
|
|
if (onefs != 0)
|
|
sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS;
|
|
/* Check to see if reclaim complete has already happened. */
|
|
else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0)
|
|
error = NFSERR_COMPLETEALREADY;
|
|
else {
|
|
sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE;
|
|
nfsrv_markreclaim(sep->sess_clp);
|
|
}
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Cache the reply in a session slot.
|
|
*/
|
|
void
|
|
nfsrv_cache_session(struct nfsrv_descript *nd, struct mbuf **m)
|
|
{
|
|
struct nfsdsession *sep;
|
|
struct nfssessionhash *shp;
|
|
char *buf, *cp;
|
|
#ifdef INET
|
|
struct sockaddr_in *sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
|
|
shp = NFSSESSIONHASH(nd->nd_sessionid);
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(nd->nd_sessionid);
|
|
if (sep == NULL) {
|
|
NFSUNLOCKSESSION(shp);
|
|
if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags &
|
|
NFSNSF_GRACEOVER) != 0) {
|
|
buf = malloc(INET6_ADDRSTRLEN, M_TEMP, M_WAITOK);
|
|
switch (nd->nd_nam->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)nd->nd_nam;
|
|
cp = inet_ntop(sin->sin_family,
|
|
&sin->sin_addr.s_addr, buf,
|
|
INET6_ADDRSTRLEN);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)nd->nd_nam;
|
|
cp = inet_ntop(sin6->sin6_family,
|
|
&sin6->sin6_addr, buf, INET6_ADDRSTRLEN);
|
|
break;
|
|
#endif
|
|
default:
|
|
cp = NULL;
|
|
}
|
|
if (cp != NULL)
|
|
printf("nfsrv_cache_session: no session "
|
|
"IPaddr=%s, check NFS clients for unique "
|
|
"/etc/hostid's\n", cp);
|
|
else
|
|
printf("nfsrv_cache_session: no session, "
|
|
"check NFS clients for unique "
|
|
"/etc/hostid's\n");
|
|
free(buf, M_TEMP);
|
|
}
|
|
m_freem(*m);
|
|
return;
|
|
}
|
|
nfsv4_seqsess_cacherep(nd->nd_slotid, sep->sess_slots, nd->nd_repstat,
|
|
m);
|
|
NFSUNLOCKSESSION(shp);
|
|
}
|
|
|
|
/*
|
|
* Search for a session that matches the sessionid.
|
|
*/
|
|
static struct nfsdsession *
|
|
nfsrv_findsession(uint8_t *sessionid)
|
|
{
|
|
struct nfsdsession *sep;
|
|
struct nfssessionhash *shp;
|
|
|
|
shp = NFSSESSIONHASH(sessionid);
|
|
LIST_FOREACH(sep, &shp->list, sess_hash) {
|
|
if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID))
|
|
break;
|
|
}
|
|
return (sep);
|
|
}
|
|
|
|
/*
|
|
* Destroy a session.
|
|
*/
|
|
int
|
|
nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid)
|
|
{
|
|
int error, igotlock, samesess;
|
|
|
|
samesess = 0;
|
|
if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) &&
|
|
(nd->nd_flag & ND_HASSEQUENCE) != 0) {
|
|
samesess = 1;
|
|
if ((nd->nd_flag & ND_LASTOP) == 0)
|
|
return (NFSERR_BADSESSION);
|
|
}
|
|
|
|
/* Lock out other nfsd threads */
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_relref(&nfsv4rootfs_lock);
|
|
do {
|
|
igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL,
|
|
NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (igotlock == 0);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
|
|
error = nfsrv_freesession(nd, NULL, sessionid);
|
|
if (error == 0 && samesess != 0)
|
|
nd->nd_flag &= ~ND_HASSEQUENCE;
|
|
|
|
NFSLOCKV4ROOTMUTEX();
|
|
nfsv4_unlock(&nfsv4rootfs_lock, 1);
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Bind a connection to a session.
|
|
* For now, only certain variants are supported, since the current session
|
|
* structure can only handle a single backchannel entry, which will be
|
|
* applied to all connections if it is set.
|
|
*/
|
|
int
|
|
nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp)
|
|
{
|
|
struct nfssessionhash *shp;
|
|
struct nfsdsession *sep;
|
|
struct nfsclient *clp;
|
|
SVCXPRT *savxprt;
|
|
int error;
|
|
|
|
error = 0;
|
|
savxprt = NULL;
|
|
shp = NFSSESSIONHASH(sessionid);
|
|
NFSLOCKSTATE();
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(sessionid);
|
|
if (sep != NULL) {
|
|
clp = sep->sess_clp;
|
|
error = nfsrv_checkmachcred(NFSV4OP_BINDCONNTOSESS, nd, clp);
|
|
if (error != 0)
|
|
goto out;
|
|
if (*foreaftp == NFSCDFC4_BACK ||
|
|
*foreaftp == NFSCDFC4_BACK_OR_BOTH ||
|
|
*foreaftp == NFSCDFC4_FORE_OR_BOTH) {
|
|
/* Try to set up a backchannel. */
|
|
if (clp->lc_req.nr_client == NULL) {
|
|
NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire "
|
|
"backchannel\n");
|
|
clp->lc_req.nr_client = (struct __rpc_client *)
|
|
clnt_bck_create(nd->nd_xprt->xp_socket,
|
|
sep->sess_cbprogram, NFSV4_CBVERS);
|
|
}
|
|
if (clp->lc_req.nr_client != NULL) {
|
|
NFSD_DEBUG(2, "nfsrv_bindconnsess: set up "
|
|
"backchannel\n");
|
|
savxprt = sep->sess_cbsess.nfsess_xprt;
|
|
SVC_ACQUIRE(nd->nd_xprt);
|
|
CLNT_ACQUIRE(clp->lc_req.nr_client);
|
|
nd->nd_xprt->xp_p2 = clp->lc_req.nr_client;
|
|
/* Disable idle timeout. */
|
|
nd->nd_xprt->xp_idletimeout = 0;
|
|
sep->sess_cbsess.nfsess_xprt = nd->nd_xprt;
|
|
sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN;
|
|
clp->lc_flags |= LCL_DONEBINDCONN |
|
|
LCL_NEEDSCBNULL;
|
|
clp->lc_flags &= ~LCL_CBDOWN;
|
|
if (*foreaftp == NFSCDFS4_BACK)
|
|
*foreaftp = NFSCDFS4_BACK;
|
|
else
|
|
*foreaftp = NFSCDFS4_BOTH;
|
|
} else if (*foreaftp != NFSCDFC4_BACK) {
|
|
NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set "
|
|
"up backchannel\n");
|
|
sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN;
|
|
clp->lc_flags |= LCL_DONEBINDCONN;
|
|
*foreaftp = NFSCDFS4_FORE;
|
|
} else {
|
|
error = NFSERR_NOTSUPP;
|
|
printf("nfsrv_bindconnsess: Can't add "
|
|
"backchannel\n");
|
|
}
|
|
} else {
|
|
NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n");
|
|
clp->lc_flags |= LCL_DONEBINDCONN;
|
|
*foreaftp = NFSCDFS4_FORE;
|
|
}
|
|
} else
|
|
error = NFSERR_BADSESSION;
|
|
out:
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
if (savxprt != NULL)
|
|
SVC_RELEASE(savxprt);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Free up a session structure.
|
|
*/
|
|
static int
|
|
nfsrv_freesession(struct nfsrv_descript *nd, struct nfsdsession *sep,
|
|
uint8_t *sessionid)
|
|
{
|
|
struct nfssessionhash *shp;
|
|
int i;
|
|
|
|
NFSLOCKSTATE();
|
|
if (sep == NULL) {
|
|
shp = NFSSESSIONHASH(sessionid);
|
|
NFSLOCKSESSION(shp);
|
|
sep = nfsrv_findsession(sessionid);
|
|
} else {
|
|
shp = NFSSESSIONHASH(sep->sess_sessionid);
|
|
NFSLOCKSESSION(shp);
|
|
}
|
|
if (sep != NULL) {
|
|
/* Check for the SP4_MACH_CRED case. */
|
|
if (nd != NULL && nfsrv_checkmachcred(NFSV4OP_DESTROYSESSION,
|
|
nd, sep->sess_clp) != 0) {
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
|
|
}
|
|
|
|
sep->sess_refcnt--;
|
|
if (sep->sess_refcnt > 0) {
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
return (NFSERR_BACKCHANBUSY);
|
|
}
|
|
LIST_REMOVE(sep, sess_hash);
|
|
LIST_REMOVE(sep, sess_list);
|
|
}
|
|
NFSUNLOCKSESSION(shp);
|
|
NFSUNLOCKSTATE();
|
|
if (sep == NULL)
|
|
return (NFSERR_BADSESSION);
|
|
for (i = 0; i < NFSV4_SLOTS; i++)
|
|
if (sep->sess_slots[i].nfssl_reply != NULL)
|
|
m_freem(sep->sess_slots[i].nfssl_reply);
|
|
if (sep->sess_cbsess.nfsess_xprt != NULL)
|
|
SVC_RELEASE(sep->sess_cbsess.nfsess_xprt);
|
|
free(sep, M_NFSDSESSION);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free a stateid.
|
|
* RFC5661 says that it should fail when there are associated opens, locks
|
|
* or delegations. Since stateids represent opens, I don't see how you can
|
|
* free an open stateid (it will be free'd when closed), so this function
|
|
* only works for lock stateids (freeing the lock_owner) or delegations.
|
|
*/
|
|
int
|
|
nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp,
|
|
NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfsstate *stp;
|
|
int error;
|
|
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Look up the stateid
|
|
*/
|
|
error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
|
|
NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (error == 0) {
|
|
/* First, check for a delegation. */
|
|
LIST_FOREACH(stp, &clp->lc_deleg, ls_list) {
|
|
if (!NFSBCMP(stp->ls_stateid.other, stateidp->other,
|
|
NFSX_STATEIDOTHER))
|
|
break;
|
|
}
|
|
if (stp != NULL) {
|
|
nfsrv_freedeleg(stp);
|
|
NFSUNLOCKSTATE();
|
|
return (error);
|
|
}
|
|
}
|
|
/* Not a delegation, try for a lock_owner. */
|
|
if (error == 0)
|
|
error = nfsrv_getstate(clp, stateidp, 0, &stp);
|
|
if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD |
|
|
NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0))
|
|
/* Not a lock_owner stateid. */
|
|
error = NFSERR_LOCKSHELD;
|
|
if (error == 0 && !LIST_EMPTY(&stp->ls_lock))
|
|
error = NFSERR_LOCKSHELD;
|
|
if (error == 0)
|
|
nfsrv_freelockowner(stp, NULL, 0, p);
|
|
NFSUNLOCKSTATE();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Test a stateid.
|
|
*/
|
|
int
|
|
nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp,
|
|
NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfsstate *stp;
|
|
int error;
|
|
|
|
NFSLOCKSTATE();
|
|
/*
|
|
* Look up the stateid
|
|
*/
|
|
error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
|
|
NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (error == 0)
|
|
error = nfsrv_getstate(clp, stateidp, 0, &stp);
|
|
if (error == 0 && stateidp->seqid != 0 &&
|
|
SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid))
|
|
error = NFSERR_OLDSTATEID;
|
|
NFSUNLOCKSTATE();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Generate the xdr for an NFSv4.1 CBSequence Operation.
|
|
*/
|
|
static int
|
|
nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp,
|
|
int dont_replycache, struct nfsdsession **sepp, int *slotposp)
|
|
{
|
|
struct nfsdsession *sep;
|
|
uint32_t *tl, slotseq = 0;
|
|
int maxslot;
|
|
uint8_t sessionid[NFSX_V4SESSIONID];
|
|
int error;
|
|
|
|
error = nfsv4_getcbsession(clp, sepp);
|
|
if (error != 0)
|
|
return (error);
|
|
sep = *sepp;
|
|
nfsv4_sequencelookup(NULL, &sep->sess_cbsess, slotposp, &maxslot,
|
|
&slotseq, sessionid, true);
|
|
KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot"));
|
|
|
|
/* Build the Sequence arguments. */
|
|
NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED);
|
|
bcopy(sessionid, tl, NFSX_V4SESSIONID);
|
|
tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
|
|
nd->nd_slotseq = tl;
|
|
nd->nd_slotid = *slotposp;
|
|
nd->nd_flag |= ND_HASSLOTID;
|
|
*tl++ = txdr_unsigned(slotseq);
|
|
*tl++ = txdr_unsigned(*slotposp);
|
|
*tl++ = txdr_unsigned(maxslot);
|
|
if (dont_replycache == 0)
|
|
*tl++ = newnfs_true;
|
|
else
|
|
*tl++ = newnfs_false;
|
|
*tl = 0; /* No referring call list, for now. */
|
|
nd->nd_flag |= ND_HASSEQUENCE;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get a session for the callback.
|
|
*/
|
|
static int
|
|
nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp)
|
|
{
|
|
struct nfsdsession *sep;
|
|
|
|
NFSLOCKSTATE();
|
|
LIST_FOREACH(sep, &clp->lc_session, sess_list) {
|
|
if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0)
|
|
break;
|
|
}
|
|
if (sep == NULL) {
|
|
NFSUNLOCKSTATE();
|
|
return (NFSERR_BADSESSION);
|
|
}
|
|
sep->sess_refcnt++;
|
|
*sepp = sep;
|
|
NFSUNLOCKSTATE();
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free up all backchannel xprts. This needs to be done when the nfsd threads
|
|
* exit, since those transports will all be going away.
|
|
* This is only called after all the nfsd threads are done performing RPCs,
|
|
* so locking shouldn't be an issue.
|
|
*/
|
|
void
|
|
nfsrv_freeallbackchannel_xprts(void)
|
|
{
|
|
struct nfsdsession *sep;
|
|
struct nfsclient *clp;
|
|
SVCXPRT *xprt;
|
|
int i;
|
|
|
|
for (i = 0; i < nfsrv_clienthashsize; i++) {
|
|
LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) {
|
|
LIST_FOREACH(sep, &clp->lc_session, sess_list) {
|
|
xprt = sep->sess_cbsess.nfsess_xprt;
|
|
sep->sess_cbsess.nfsess_xprt = NULL;
|
|
if (xprt != NULL)
|
|
SVC_RELEASE(xprt);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do a layout commit. Actually just call nfsrv_updatemdsattr().
|
|
* I have no idea if the rest of these arguments will ever be useful?
|
|
*/
|
|
int
|
|
nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype,
|
|
int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len,
|
|
int hasnewmtime, struct timespec *newmtimep, int reclaim,
|
|
nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep,
|
|
uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p)
|
|
{
|
|
struct nfsvattr na;
|
|
int error;
|
|
|
|
error = nfsrv_updatemdsattr(vp, &na, p);
|
|
if (error == 0) {
|
|
*hasnewsizep = 1;
|
|
*newsizep = na.na_size;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Try and get a layout.
|
|
*/
|
|
int
|
|
nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp,
|
|
int layouttype, int *iomode, uint64_t *offset, uint64_t *len,
|
|
uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose,
|
|
int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp;
|
|
char *devid;
|
|
fhandle_t fh, *dsfhp;
|
|
int error, mirrorcnt;
|
|
|
|
if (nfsrv_devidcnt == 0)
|
|
return (NFSERR_UNKNLAYOUTTYPE);
|
|
|
|
if (*offset != 0)
|
|
printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset,
|
|
(uintmax_t)*len);
|
|
error = nfsvno_getfh(vp, &fh, p);
|
|
NFSD_DEBUG(4, "layoutget getfh=%d\n", error);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* For now, all layouts are for entire files.
|
|
* Only issue Read/Write layouts if requested for a non-readonly fs.
|
|
*/
|
|
if (NFSVNO_EXRDONLY(exp)) {
|
|
if (*iomode == NFSLAYOUTIOMODE_RW)
|
|
return (NFSERR_LAYOUTTRYLATER);
|
|
*iomode = NFSLAYOUTIOMODE_READ;
|
|
}
|
|
if (*iomode != NFSLAYOUTIOMODE_RW)
|
|
*iomode = NFSLAYOUTIOMODE_READ;
|
|
|
|
/*
|
|
* Check to see if a write layout can be issued for this file.
|
|
* This is used during mirror recovery to avoid RW layouts being
|
|
* issued for a file while it is being copied to the recovered
|
|
* mirror.
|
|
*/
|
|
if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0)
|
|
return (NFSERR_LAYOUTTRYLATER);
|
|
|
|
*retonclose = 0;
|
|
*offset = 0;
|
|
*len = UINT64_MAX;
|
|
|
|
/* First, see if a layout already exists and return if found. */
|
|
lhyp = NFSLAYOUTHASH(&fh);
|
|
NFSLOCKLAYOUT(lhyp);
|
|
error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp);
|
|
NFSD_DEBUG(4, "layoutget findlay=%d\n", error);
|
|
/*
|
|
* Not sure if the seqid must be the same, so I won't check it.
|
|
*/
|
|
if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] ||
|
|
stateidp->other[1] != lyp->lay_stateid.other[1] ||
|
|
stateidp->other[2] != lyp->lay_stateid.other[2])) {
|
|
if ((lyp->lay_flags & NFSLAY_CALLB) == 0) {
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
NFSD_DEBUG(1, "ret bad stateid\n");
|
|
return (NFSERR_BADSTATEID);
|
|
}
|
|
/*
|
|
* I believe we get here because there is a race between
|
|
* the client processing the CBLAYOUTRECALL and the layout
|
|
* being deleted here on the server.
|
|
* The client has now done a LayoutGet with a non-layout
|
|
* stateid, as it would when there is no layout.
|
|
* As such, free this layout and set error == NFSERR_BADSTATEID
|
|
* so the code below will create a new layout structure as
|
|
* would happen if no layout was found.
|
|
* "lyp" will be set before being used below, but set it NULL
|
|
* as a safety belt.
|
|
*/
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
lyp = NULL;
|
|
error = NFSERR_BADSTATEID;
|
|
}
|
|
if (error == 0) {
|
|
if (lyp->lay_layoutlen > maxcnt) {
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
NFSD_DEBUG(1, "ret layout too small\n");
|
|
return (NFSERR_TOOSMALL);
|
|
}
|
|
if (*iomode == NFSLAYOUTIOMODE_RW) {
|
|
if ((lyp->lay_flags & NFSLAY_NOSPC) != 0) {
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
NFSD_DEBUG(1, "ret layout nospace\n");
|
|
return (NFSERR_NOSPC);
|
|
}
|
|
lyp->lay_flags |= NFSLAY_RW;
|
|
} else
|
|
lyp->lay_flags |= NFSLAY_READ;
|
|
NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen);
|
|
*layoutlenp = lyp->lay_layoutlen;
|
|
if (++lyp->lay_stateid.seqid == 0)
|
|
lyp->lay_stateid.seqid = 1;
|
|
stateidp->seqid = lyp->lay_stateid.seqid;
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
NFSD_DEBUG(4, "ret fnd layout\n");
|
|
return (0);
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
|
|
/* Find the device id and file handle. */
|
|
dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK);
|
|
devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK);
|
|
error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid);
|
|
NFSD_DEBUG(4, "layoutget devandfh=%d\n", error);
|
|
if (error == 0) {
|
|
if (layouttype == NFSLAYOUT_NFSV4_1_FILES) {
|
|
if (NFSX_V4FILELAYOUT > maxcnt)
|
|
error = NFSERR_TOOSMALL;
|
|
else
|
|
lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp,
|
|
devid, vp->v_mount->mnt_stat.f_fsid);
|
|
} else {
|
|
if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt)
|
|
error = NFSERR_TOOSMALL;
|
|
else
|
|
lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt,
|
|
&fh, dsfhp, devid,
|
|
vp->v_mount->mnt_stat.f_fsid);
|
|
}
|
|
}
|
|
free(dsfhp, M_TEMP);
|
|
free(devid, M_TEMP);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* Now, add this layout to the list.
|
|
*/
|
|
error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p);
|
|
NFSD_DEBUG(4, "layoutget addl=%d\n", error);
|
|
/*
|
|
* The lyp will be set to NULL by nfsrv_addlayout() if it
|
|
* linked the new structure into the lists.
|
|
*/
|
|
free(lyp, M_NFSDSTATE);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Generate a File Layout.
|
|
*/
|
|
static struct nfslayout *
|
|
nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp,
|
|
fhandle_t *dsfhp, char *devid, fsid_t fs)
|
|
{
|
|
uint32_t *tl;
|
|
struct nfslayout *lyp;
|
|
uint64_t pattern_offset;
|
|
|
|
lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE,
|
|
M_WAITOK | M_ZERO);
|
|
lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES;
|
|
if (iomode == NFSLAYOUTIOMODE_RW)
|
|
lyp->lay_flags = NFSLAY_RW;
|
|
else
|
|
lyp->lay_flags = NFSLAY_READ;
|
|
NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp));
|
|
lyp->lay_clientid.qval = nd->nd_clientid.qval;
|
|
lyp->lay_fsid = fs;
|
|
NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID);
|
|
|
|
/* Fill in the xdr for the files layout. */
|
|
tl = (uint32_t *)lyp->lay_xdr;
|
|
NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */
|
|
tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
|
|
|
|
/* Set the stripe size to the maximum I/O size. */
|
|
*tl++ = txdr_unsigned(nfs_srvmaxio & NFSFLAYUTIL_STRIPE_MASK);
|
|
*tl++ = 0; /* 1st stripe index. */
|
|
pattern_offset = 0;
|
|
txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */
|
|
*tl++ = txdr_unsigned(1); /* 1 file handle. */
|
|
*tl++ = txdr_unsigned(NFSX_V4PNFSFH);
|
|
NFSBCOPY(dsfhp, tl, sizeof(*dsfhp));
|
|
lyp->lay_layoutlen = NFSX_V4FILELAYOUT;
|
|
return (lyp);
|
|
}
|
|
|
|
#define FLEX_OWNERID "999"
|
|
#define FLEX_UID0 "0"
|
|
/*
|
|
* Generate a Flex File Layout.
|
|
* The FLEX_OWNERID can be any string of 3 decimal digits. Although this
|
|
* string goes on the wire, it isn't supposed to be used by the client,
|
|
* since this server uses tight coupling.
|
|
* Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use
|
|
* a string of "0". This works around the Linux Flex File Layout driver bug
|
|
* which uses the synthetic uid/gid strings for the "tightly coupled" case.
|
|
*/
|
|
static struct nfslayout *
|
|
nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt,
|
|
fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs)
|
|
{
|
|
uint32_t *tl;
|
|
struct nfslayout *lyp;
|
|
uint64_t lenval;
|
|
int i;
|
|
|
|
lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt),
|
|
M_NFSDSTATE, M_WAITOK | M_ZERO);
|
|
lyp->lay_type = NFSLAYOUT_FLEXFILE;
|
|
if (iomode == NFSLAYOUTIOMODE_RW)
|
|
lyp->lay_flags = NFSLAY_RW;
|
|
else
|
|
lyp->lay_flags = NFSLAY_READ;
|
|
NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp));
|
|
lyp->lay_clientid.qval = nd->nd_clientid.qval;
|
|
lyp->lay_fsid = fs;
|
|
lyp->lay_mirrorcnt = mirrorcnt;
|
|
NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID);
|
|
|
|
/* Fill in the xdr for the files layout. */
|
|
tl = (uint32_t *)lyp->lay_xdr;
|
|
lenval = 0;
|
|
txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */
|
|
*tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */
|
|
for (i = 0; i < mirrorcnt; i++) {
|
|
*tl++ = txdr_unsigned(1); /* One stripe. */
|
|
NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */
|
|
tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
|
|
devid += NFSX_V4DEVICEID;
|
|
*tl++ = txdr_unsigned(1); /* Efficiency. */
|
|
*tl++ = 0; /* Proxy Stateid. */
|
|
*tl++ = 0x55555555;
|
|
*tl++ = 0x55555555;
|
|
*tl++ = 0x55555555;
|
|
*tl++ = txdr_unsigned(1); /* 1 file handle. */
|
|
*tl++ = txdr_unsigned(NFSX_V4PNFSFH);
|
|
NFSBCOPY(dsfhp, tl, sizeof(*dsfhp));
|
|
tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED);
|
|
dsfhp++;
|
|
if (nfsrv_flexlinuxhack != 0) {
|
|
*tl++ = txdr_unsigned(strlen(FLEX_UID0));
|
|
*tl = 0; /* 0 pad string. */
|
|
NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0));
|
|
*tl++ = txdr_unsigned(strlen(FLEX_UID0));
|
|
*tl = 0; /* 0 pad string. */
|
|
NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0));
|
|
} else {
|
|
*tl++ = txdr_unsigned(strlen(FLEX_OWNERID));
|
|
NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(strlen(FLEX_OWNERID));
|
|
NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED);
|
|
}
|
|
}
|
|
*tl++ = txdr_unsigned(0); /* ff_flags. */
|
|
*tl = txdr_unsigned(60); /* Status interval hint. */
|
|
lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt);
|
|
return (lyp);
|
|
}
|
|
|
|
/*
|
|
* Parse and process Flex File errors returned via LayoutReturn.
|
|
*/
|
|
static void
|
|
nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt,
|
|
NFSPROC_T *p)
|
|
{
|
|
uint32_t *tl;
|
|
int cnt, errcnt, i, j, opnum, stat;
|
|
char devid[NFSX_V4DEVICEID];
|
|
|
|
tl = layp;
|
|
maxcnt -= NFSX_UNSIGNED;
|
|
if (maxcnt > 0)
|
|
cnt = fxdr_unsigned(int, *tl++);
|
|
else
|
|
cnt = 0;
|
|
NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt);
|
|
for (i = 0; i < cnt; i++) {
|
|
maxcnt -= NFSX_STATEID + 2 * NFSX_HYPER +
|
|
NFSX_UNSIGNED;
|
|
if (maxcnt <= 0)
|
|
break;
|
|
/* Skip offset, length and stateid for now. */
|
|
tl += (4 + NFSX_STATEID / NFSX_UNSIGNED);
|
|
errcnt = fxdr_unsigned(int, *tl++);
|
|
NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt);
|
|
for (j = 0; j < errcnt; j++) {
|
|
maxcnt -= NFSX_V4DEVICEID + 2 * NFSX_UNSIGNED;
|
|
if (maxcnt < 0)
|
|
break;
|
|
NFSBCOPY(tl, devid, NFSX_V4DEVICEID);
|
|
tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
|
|
stat = fxdr_unsigned(int, *tl++);
|
|
opnum = fxdr_unsigned(int, *tl++);
|
|
NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum,
|
|
stat);
|
|
/*
|
|
* Except for NFSERR_ACCES, NFSERR_STALE and
|
|
* NFSERR_NOSPC errors, disable the mirror.
|
|
*/
|
|
if (stat != NFSERR_ACCES && stat != NFSERR_STALE &&
|
|
stat != NFSERR_NOSPC)
|
|
nfsrv_delds(devid, p);
|
|
|
|
/* For NFSERR_NOSPC, mark all devids and layouts. */
|
|
if (stat == NFSERR_NOSPC)
|
|
nfsrv_marknospc(devid, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function removes all flex file layouts which has a mirror with
|
|
* a device id that matches the argument.
|
|
* Called when the DS represented by the device id has failed.
|
|
*/
|
|
void
|
|
nfsrv_flexmirrordel(char *devid, NFSPROC_T *p)
|
|
{
|
|
uint32_t *tl;
|
|
struct nfslayout *lyp, *nlyp;
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayouthead loclyp;
|
|
int i, j;
|
|
|
|
NFSD_DEBUG(4, "flexmirrordel\n");
|
|
/* Move all layouts found onto a local list. */
|
|
TAILQ_INIT(&loclyp);
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
lhyp = &nfslayouthash[i];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
|
|
if (lyp->lay_type == NFSLAYOUT_FLEXFILE &&
|
|
lyp->lay_mirrorcnt > 1) {
|
|
NFSD_DEBUG(4, "possible match\n");
|
|
tl = lyp->lay_xdr;
|
|
tl += 3;
|
|
for (j = 0; j < lyp->lay_mirrorcnt; j++) {
|
|
tl++;
|
|
if (NFSBCMP(devid, tl, NFSX_V4DEVICEID)
|
|
== 0) {
|
|
/* Found one. */
|
|
NFSD_DEBUG(4, "fnd one\n");
|
|
TAILQ_REMOVE(&lhyp->list, lyp,
|
|
lay_list);
|
|
TAILQ_INSERT_HEAD(&loclyp, lyp,
|
|
lay_list);
|
|
break;
|
|
}
|
|
tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED +
|
|
NFSM_RNDUP(NFSX_V4PNFSFH) /
|
|
NFSX_UNSIGNED + 11 * NFSX_UNSIGNED);
|
|
}
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
|
|
/* Now, try to do a Layout recall for each one found. */
|
|
TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) {
|
|
NFSD_DEBUG(4, "do layout recall\n");
|
|
/*
|
|
* The layout stateid.seqid needs to be incremented
|
|
* before doing a LAYOUT_RECALL callback.
|
|
*/
|
|
if (++lyp->lay_stateid.seqid == 0)
|
|
lyp->lay_stateid.seqid = 1;
|
|
nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid,
|
|
&lyp->lay_fh, lyp, 1, lyp->lay_type, p);
|
|
nfsrv_freelayout(&loclyp, lyp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do a recall callback to the client for this layout.
|
|
*/
|
|
static int
|
|
nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp,
|
|
struct nfslayout *lyp, int changed, int laytype, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
int error;
|
|
|
|
NFSD_DEBUG(4, "nfsrv_recalllayout\n");
|
|
error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0),
|
|
0, NULL, p);
|
|
NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error);
|
|
if (error != 0) {
|
|
printf("nfsrv_recalllayout: getclient err=%d\n", error);
|
|
return (error);
|
|
}
|
|
if ((clp->lc_flags & LCL_NFSV41) != 0) {
|
|
error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL,
|
|
stateidp, changed, fhp, NULL, NULL, laytype, p);
|
|
/* If lyp != NULL, handle an error return here. */
|
|
if (error != 0 && lyp != NULL) {
|
|
NFSDRECALLLOCK();
|
|
/*
|
|
* Mark it returned, since no layout recall
|
|
* has been done.
|
|
* All errors seem to be non-recoverable, although
|
|
* NFSERR_NOMATCHLAYOUT is a normal event.
|
|
*/
|
|
if ((lyp->lay_flags & NFSLAY_RECALL) != 0) {
|
|
lyp->lay_flags |= NFSLAY_RETURNED;
|
|
wakeup(lyp);
|
|
}
|
|
NFSDRECALLUNLOCK();
|
|
if (error != NFSERR_NOMATCHLAYOUT)
|
|
printf("nfsrv_recalllayout: err=%d\n", error);
|
|
}
|
|
} else
|
|
printf("nfsrv_recalllayout: clp not NFSv4.1\n");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Find a layout to recall when we exceed our high water mark.
|
|
*/
|
|
void
|
|
nfsrv_recalloldlayout(NFSPROC_T *p)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp;
|
|
nfsquad_t clientid;
|
|
nfsv4stateid_t stateid;
|
|
fhandle_t fh;
|
|
int error, laytype = 0, ret;
|
|
|
|
lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) {
|
|
if ((lyp->lay_flags & NFSLAY_CALLB) == 0) {
|
|
lyp->lay_flags |= NFSLAY_CALLB;
|
|
/*
|
|
* The layout stateid.seqid needs to be incremented
|
|
* before doing a LAYOUT_RECALL callback.
|
|
*/
|
|
if (++lyp->lay_stateid.seqid == 0)
|
|
lyp->lay_stateid.seqid = 1;
|
|
clientid = lyp->lay_clientid;
|
|
stateid = lyp->lay_stateid;
|
|
NFSBCOPY(&lyp->lay_fh, &fh, sizeof(fh));
|
|
laytype = lyp->lay_type;
|
|
break;
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
if (lyp != NULL) {
|
|
error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, 0,
|
|
laytype, p);
|
|
if (error != 0 && error != NFSERR_NOMATCHLAYOUT)
|
|
NFSD_DEBUG(4, "recallold=%d\n", error);
|
|
if (error != 0) {
|
|
NFSLOCKLAYOUT(lhyp);
|
|
/*
|
|
* Since the hash list was unlocked, we need to
|
|
* find it again.
|
|
*/
|
|
ret = nfsrv_findlayout(&clientid, &fh, laytype, p,
|
|
&lyp);
|
|
if (ret == 0 &&
|
|
(lyp->lay_flags & NFSLAY_CALLB) != 0 &&
|
|
lyp->lay_stateid.other[0] == stateid.other[0] &&
|
|
lyp->lay_stateid.other[1] == stateid.other[1] &&
|
|
lyp->lay_stateid.other[2] == stateid.other[2]) {
|
|
/*
|
|
* The client no longer knows this layout, so
|
|
* it can be free'd now.
|
|
*/
|
|
if (error == NFSERR_NOMATCHLAYOUT)
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
else {
|
|
/*
|
|
* Leave it to be tried later by
|
|
* clearing NFSLAY_CALLB and moving
|
|
* it to the head of the list, so it
|
|
* won't be tried again for a while.
|
|
*/
|
|
lyp->lay_flags &= ~NFSLAY_CALLB;
|
|
TAILQ_REMOVE(&lhyp->list, lyp,
|
|
lay_list);
|
|
TAILQ_INSERT_HEAD(&lhyp->list, lyp,
|
|
lay_list);
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Try and return layout(s).
|
|
*/
|
|
int
|
|
nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp,
|
|
int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim,
|
|
int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp,
|
|
struct ucred *cred, NFSPROC_T *p)
|
|
{
|
|
struct nfsvattr na;
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp;
|
|
fhandle_t fh;
|
|
int error = 0;
|
|
|
|
*fndp = 0;
|
|
if (kind == NFSV4LAYOUTRET_FILE) {
|
|
error = nfsvno_getfh(vp, &fh, p);
|
|
if (error == 0) {
|
|
error = nfsrv_updatemdsattr(vp, &na, p);
|
|
if (error != 0)
|
|
printf("nfsrv_layoutreturn: updatemdsattr"
|
|
" failed=%d\n", error);
|
|
}
|
|
if (error == 0) {
|
|
if (reclaim == newnfs_true) {
|
|
error = nfsrv_checkgrace(NULL, NULL,
|
|
NFSLCK_RECLAIM);
|
|
if (error != NFSERR_NOGRACE)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
lhyp = NFSLAYOUTHASH(&fh);
|
|
NFSDRECALLLOCK();
|
|
NFSLOCKLAYOUT(lhyp);
|
|
error = nfsrv_findlayout(&nd->nd_clientid, &fh,
|
|
layouttype, p, &lyp);
|
|
NFSD_DEBUG(4, "layoutret findlay=%d\n", error);
|
|
if (error == 0 &&
|
|
stateidp->other[0] == lyp->lay_stateid.other[0] &&
|
|
stateidp->other[1] == lyp->lay_stateid.other[1] &&
|
|
stateidp->other[2] == lyp->lay_stateid.other[2]) {
|
|
NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d"
|
|
" %x %x %x laystateid %d %x %x %x"
|
|
" off=%ju len=%ju flgs=0x%x\n",
|
|
stateidp->seqid, stateidp->other[0],
|
|
stateidp->other[1], stateidp->other[2],
|
|
lyp->lay_stateid.seqid,
|
|
lyp->lay_stateid.other[0],
|
|
lyp->lay_stateid.other[1],
|
|
lyp->lay_stateid.other[2],
|
|
(uintmax_t)offset, (uintmax_t)len,
|
|
lyp->lay_flags);
|
|
if (++lyp->lay_stateid.seqid == 0)
|
|
lyp->lay_stateid.seqid = 1;
|
|
stateidp->seqid = lyp->lay_stateid.seqid;
|
|
if (offset == 0 && len == UINT64_MAX) {
|
|
if ((iomode & NFSLAYOUTIOMODE_READ) !=
|
|
0)
|
|
lyp->lay_flags &= ~NFSLAY_READ;
|
|
if ((iomode & NFSLAYOUTIOMODE_RW) != 0)
|
|
lyp->lay_flags &= ~NFSLAY_RW;
|
|
if ((lyp->lay_flags & (NFSLAY_READ |
|
|
NFSLAY_RW)) == 0)
|
|
nfsrv_freelayout(&lhyp->list,
|
|
lyp);
|
|
else
|
|
*fndp = 1;
|
|
} else
|
|
*fndp = 1;
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
/* Search the nfsrv_recalllist for a match. */
|
|
TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
|
|
if (NFSBCMP(&lyp->lay_fh, &fh,
|
|
sizeof(fh)) == 0 &&
|
|
lyp->lay_clientid.qval ==
|
|
nd->nd_clientid.qval &&
|
|
stateidp->other[0] ==
|
|
lyp->lay_stateid.other[0] &&
|
|
stateidp->other[1] ==
|
|
lyp->lay_stateid.other[1] &&
|
|
stateidp->other[2] ==
|
|
lyp->lay_stateid.other[2]) {
|
|
lyp->lay_flags |= NFSLAY_RETURNED;
|
|
wakeup(lyp);
|
|
error = 0;
|
|
}
|
|
}
|
|
NFSDRECALLUNLOCK();
|
|
}
|
|
if (layouttype == NFSLAYOUT_FLEXFILE && layp != NULL)
|
|
nfsrv_flexlayouterr(nd, layp, maxcnt, p);
|
|
} else if (kind == NFSV4LAYOUTRET_FSID)
|
|
nfsrv_freelayouts(&nd->nd_clientid,
|
|
&vp->v_mount->mnt_stat.f_fsid, layouttype, iomode);
|
|
else if (kind == NFSV4LAYOUTRET_ALL)
|
|
nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode);
|
|
else
|
|
error = NFSERR_INVAL;
|
|
if (error == -1)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Look for an existing layout.
|
|
*/
|
|
static int
|
|
nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype,
|
|
NFSPROC_T *p, struct nfslayout **lypp)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp;
|
|
int ret;
|
|
|
|
*lypp = NULL;
|
|
ret = 0;
|
|
lhyp = NFSLAYOUTHASH(fhp);
|
|
TAILQ_FOREACH(lyp, &lhyp->list, lay_list) {
|
|
if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 &&
|
|
lyp->lay_clientid.qval == clientidp->qval &&
|
|
lyp->lay_type == laytype)
|
|
break;
|
|
}
|
|
if (lyp != NULL)
|
|
*lypp = lyp;
|
|
else
|
|
ret = -1;
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Add the new layout, as required.
|
|
*/
|
|
static int
|
|
nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp,
|
|
nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p)
|
|
{
|
|
struct nfsclient *clp;
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
fhandle_t *fhp;
|
|
int error;
|
|
|
|
KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0,
|
|
("nfsrv_layoutget: no nd_clientid\n"));
|
|
lyp = *lypp;
|
|
fhp = &lyp->lay_fh;
|
|
NFSLOCKSTATE();
|
|
error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp,
|
|
NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
|
|
if (error != 0) {
|
|
NFSUNLOCKSTATE();
|
|
return (error);
|
|
}
|
|
lyp->lay_stateid.seqid = stateidp->seqid = 1;
|
|
lyp->lay_stateid.other[0] = stateidp->other[0] =
|
|
clp->lc_clientid.lval[0];
|
|
lyp->lay_stateid.other[1] = stateidp->other[1] =
|
|
clp->lc_clientid.lval[1];
|
|
lyp->lay_stateid.other[2] = stateidp->other[2] =
|
|
nfsrv_nextstateindex(clp);
|
|
NFSUNLOCKSTATE();
|
|
|
|
lhyp = NFSLAYOUTHASH(fhp);
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) {
|
|
if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 &&
|
|
nlyp->lay_clientid.qval == nd->nd_clientid.qval)
|
|
break;
|
|
}
|
|
if (nlyp != NULL) {
|
|
/* A layout already exists, so use it. */
|
|
nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW));
|
|
NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen);
|
|
*layoutlenp = nlyp->lay_layoutlen;
|
|
if (++nlyp->lay_stateid.seqid == 0)
|
|
nlyp->lay_stateid.seqid = 1;
|
|
stateidp->seqid = nlyp->lay_stateid.seqid;
|
|
stateidp->other[0] = nlyp->lay_stateid.other[0];
|
|
stateidp->other[1] = nlyp->lay_stateid.other[1];
|
|
stateidp->other[2] = nlyp->lay_stateid.other[2];
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
return (0);
|
|
}
|
|
|
|
/* Insert the new layout in the lists. */
|
|
*lypp = NULL;
|
|
atomic_add_int(&nfsrv_layoutcnt, 1);
|
|
NFSD_VNET(nfsstatsv1_p)->srvlayouts++;
|
|
NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen);
|
|
*layoutlenp = lyp->lay_layoutlen;
|
|
TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list);
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get the devinfo for a deviceid.
|
|
*/
|
|
int
|
|
nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt,
|
|
uint32_t *notify, int *devaddrlen, char **devaddr)
|
|
{
|
|
struct nfsdevice *ds;
|
|
|
|
if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype !=
|
|
NFSLAYOUT_FLEXFILE) ||
|
|
(nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES))
|
|
return (NFSERR_UNKNLAYOUTTYPE);
|
|
|
|
/*
|
|
* Now, search for the device id. Note that the structures won't go
|
|
* away, but the order changes in the list. As such, the lock only
|
|
* needs to be held during the search through the list.
|
|
*/
|
|
NFSDDSLOCK();
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 &&
|
|
ds->nfsdev_nmp != NULL)
|
|
break;
|
|
}
|
|
NFSDDSUNLOCK();
|
|
if (ds == NULL)
|
|
return (NFSERR_NOENT);
|
|
|
|
/* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */
|
|
*devaddrlen = 0;
|
|
if (layouttype == NFSLAYOUT_NFSV4_1_FILES) {
|
|
*devaddrlen = ds->nfsdev_fileaddrlen;
|
|
*devaddr = ds->nfsdev_fileaddr;
|
|
} else if (layouttype == NFSLAYOUT_FLEXFILE) {
|
|
*devaddrlen = ds->nfsdev_flexaddrlen;
|
|
*devaddr = ds->nfsdev_flexaddr;
|
|
}
|
|
if (*devaddrlen == 0)
|
|
return (NFSERR_UNKNLAYOUTTYPE);
|
|
|
|
/*
|
|
* The XDR overhead is 3 unsigned values: layout_type,
|
|
* length_of_address and notify bitmap.
|
|
* If the notify array is changed to not all zeros, the
|
|
* count of unsigned values must be increased.
|
|
*/
|
|
if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) +
|
|
3 * NFSX_UNSIGNED) {
|
|
*maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED;
|
|
return (NFSERR_TOOSMALL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free a list of layout state structures.
|
|
*/
|
|
static void
|
|
nfsrv_freelayoutlist(nfsquad_t clientid)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
int i;
|
|
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
lhyp = &nfslayouthash[i];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
|
|
if (lyp->lay_clientid.qval == clientid.qval)
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free up a layout.
|
|
*/
|
|
static void
|
|
nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp)
|
|
{
|
|
|
|
NFSD_DEBUG(4, "Freelayout=%p\n", lyp);
|
|
atomic_add_int(&nfsrv_layoutcnt, -1);
|
|
NFSD_VNET(nfsstatsv1_p)->srvlayouts--;
|
|
TAILQ_REMOVE(lhp, lyp, lay_list);
|
|
free(lyp, M_NFSDSTATE);
|
|
}
|
|
|
|
/*
|
|
* Free up a device id.
|
|
*/
|
|
void
|
|
nfsrv_freeonedevid(struct nfsdevice *ds)
|
|
{
|
|
int i;
|
|
|
|
atomic_add_int(&nfsrv_devidcnt, -1);
|
|
vrele(ds->nfsdev_dvp);
|
|
for (i = 0; i < nfsrv_dsdirsize; i++)
|
|
if (ds->nfsdev_dsdir[i] != NULL)
|
|
vrele(ds->nfsdev_dsdir[i]);
|
|
free(ds->nfsdev_fileaddr, M_NFSDSTATE);
|
|
free(ds->nfsdev_flexaddr, M_NFSDSTATE);
|
|
free(ds->nfsdev_host, M_NFSDSTATE);
|
|
free(ds, M_NFSDSTATE);
|
|
}
|
|
|
|
/*
|
|
* Free up a device id and its mirrors.
|
|
*/
|
|
static void
|
|
nfsrv_freedevid(struct nfsdevice *ds)
|
|
{
|
|
|
|
TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list);
|
|
nfsrv_freeonedevid(ds);
|
|
}
|
|
|
|
/*
|
|
* Free all layouts and device ids.
|
|
* Done when the nfsd threads are shut down since there may be a new
|
|
* modified device id list created when the nfsd is restarted.
|
|
*/
|
|
void
|
|
nfsrv_freealllayoutsanddevids(void)
|
|
{
|
|
struct nfsdontlist *mrp, *nmrp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
|
|
/* Get rid of the deviceid structures. */
|
|
nfsrv_freealldevids();
|
|
TAILQ_INIT(&nfsrv_devidhead);
|
|
nfsrv_devidcnt = 0;
|
|
|
|
/* Get rid of all layouts. */
|
|
nfsrv_freealllayouts();
|
|
|
|
/* Get rid of any nfsdontlist entries. */
|
|
LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp)
|
|
free(mrp, M_NFSDSTATE);
|
|
LIST_INIT(&nfsrv_dontlisthead);
|
|
nfsrv_dontlistlen = 0;
|
|
|
|
/* Free layouts in the recall list. */
|
|
TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp)
|
|
nfsrv_freelayout(&nfsrv_recalllisthead, lyp);
|
|
TAILQ_INIT(&nfsrv_recalllisthead);
|
|
}
|
|
|
|
/*
|
|
* Free layouts that match the arguments.
|
|
*/
|
|
static void
|
|
nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
int i;
|
|
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
lhyp = &nfslayouthash[i];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
|
|
if (clid->qval != lyp->lay_clientid.qval)
|
|
continue;
|
|
if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0)
|
|
continue;
|
|
if (laytype != lyp->lay_type)
|
|
continue;
|
|
if ((iomode & NFSLAYOUTIOMODE_READ) != 0)
|
|
lyp->lay_flags &= ~NFSLAY_READ;
|
|
if ((iomode & NFSLAYOUTIOMODE_RW) != 0)
|
|
lyp->lay_flags &= ~NFSLAY_RW;
|
|
if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0)
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free all layouts for the argument file.
|
|
*/
|
|
void
|
|
nfsrv_freefilelayouts(fhandle_t *fhp)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
|
|
lhyp = NFSLAYOUTHASH(fhp);
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
|
|
if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0)
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
|
|
/*
|
|
* Free all layouts.
|
|
*/
|
|
static void
|
|
nfsrv_freealllayouts(void)
|
|
{
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
int i;
|
|
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
lhyp = &nfslayouthash[i];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp)
|
|
nfsrv_freelayout(&lhyp->list, lyp);
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Look up the mount path for the DS server.
|
|
*/
|
|
static int
|
|
nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p,
|
|
struct nfsdevice **dsp)
|
|
{
|
|
struct nameidata nd;
|
|
struct nfsdevice *ds;
|
|
struct mount *mp;
|
|
int error, i;
|
|
char *dsdirpath;
|
|
size_t dsdirsize;
|
|
|
|
NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp);
|
|
*dsp = NULL;
|
|
if (jailed(p->td_ucred)) {
|
|
printf("A pNFS nfsd cannot run in a jail\n");
|
|
return (EPERM);
|
|
}
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
|
|
dspathp);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "lookup=%d\n", error);
|
|
if (error != 0)
|
|
return (error);
|
|
if (nd.ni_vp->v_type != VDIR) {
|
|
vput(nd.ni_vp);
|
|
NFSD_DEBUG(4, "dspath not dir\n");
|
|
return (ENOTDIR);
|
|
}
|
|
if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
|
|
vput(nd.ni_vp);
|
|
NFSD_DEBUG(4, "dspath not an NFS mount\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/*
|
|
* Allocate a DS server structure with the NFS mounted directory
|
|
* vnode reference counted, so that a non-forced dismount will
|
|
* fail with EBUSY.
|
|
* This structure is always linked into the list, even if an error
|
|
* is being returned. The caller will free the entire list upon
|
|
* an error return.
|
|
*/
|
|
*dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t),
|
|
M_NFSDSTATE, M_WAITOK | M_ZERO);
|
|
ds->nfsdev_dvp = nd.ni_vp;
|
|
ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount);
|
|
NFSVOPUNLOCK(nd.ni_vp);
|
|
|
|
dsdirsize = strlen(dspathp) + 16;
|
|
dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK);
|
|
/* Now, create the DS directory structures. */
|
|
for (i = 0; i < nfsrv_dsdirsize; i++) {
|
|
snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
|
|
UIO_SYSSPACE, dsdirpath);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error);
|
|
if (error != 0)
|
|
break;
|
|
if (nd.ni_vp->v_type != VDIR) {
|
|
vput(nd.ni_vp);
|
|
error = ENOTDIR;
|
|
NFSD_DEBUG(4, "dsdirpath not a VDIR\n");
|
|
break;
|
|
}
|
|
if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
|
|
vput(nd.ni_vp);
|
|
error = ENXIO;
|
|
NFSD_DEBUG(4, "dsdirpath not an NFS mount\n");
|
|
break;
|
|
}
|
|
ds->nfsdev_dsdir[i] = nd.ni_vp;
|
|
NFSVOPUNLOCK(nd.ni_vp);
|
|
}
|
|
free(dsdirpath, M_TEMP);
|
|
|
|
if (strlen(mdspathp) > 0) {
|
|
/*
|
|
* This DS stores file for a specific MDS exported file
|
|
* system.
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
|
|
UIO_SYSSPACE, mdspathp);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "mds lookup=%d\n", error);
|
|
if (error != 0)
|
|
goto out;
|
|
if (nd.ni_vp->v_type != VDIR) {
|
|
vput(nd.ni_vp);
|
|
error = ENOTDIR;
|
|
NFSD_DEBUG(4, "mdspath not dir\n");
|
|
goto out;
|
|
}
|
|
mp = nd.ni_vp->v_mount;
|
|
if ((mp->mnt_flag & MNT_EXPORTED) == 0) {
|
|
vput(nd.ni_vp);
|
|
error = ENXIO;
|
|
NFSD_DEBUG(4, "mdspath not an exported fs\n");
|
|
goto out;
|
|
}
|
|
ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid;
|
|
ds->nfsdev_mdsisset = 1;
|
|
vput(nd.ni_vp);
|
|
}
|
|
|
|
out:
|
|
TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list);
|
|
atomic_add_int(&nfsrv_devidcnt, 1);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Look up the mount path for the DS server and delete it.
|
|
*/
|
|
int
|
|
nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p)
|
|
{
|
|
struct mount *mp;
|
|
struct nfsmount *nmp;
|
|
struct nfsdevice *ds;
|
|
int error;
|
|
|
|
NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp);
|
|
/*
|
|
* Search for the path in the mount list. Avoid looking the path
|
|
* up, since this mount point may be hung, with associated locked
|
|
* vnodes, etc.
|
|
* Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked
|
|
* until this completes.
|
|
* As noted in the man page, this should be done before any forced
|
|
* dismount on the mount point, but at least the handshake on
|
|
* NFSMNTP_CANCELRPCS should make it safe.
|
|
*/
|
|
error = 0;
|
|
ds = NULL;
|
|
nmp = NULL;
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
|
|
if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 &&
|
|
strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 &&
|
|
mp->mnt_data != NULL) {
|
|
nmp = VFSTONFS(mp);
|
|
NFSLOCKMNT(nmp);
|
|
if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM |
|
|
NFSMNTP_CANCELRPCS)) == 0) {
|
|
nmp->nm_privflag |= NFSMNTP_CANCELRPCS;
|
|
NFSUNLOCKMNT(nmp);
|
|
} else {
|
|
NFSUNLOCKMNT(nmp);
|
|
nmp = NULL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
|
|
if (nmp != NULL) {
|
|
ds = nfsrv_deldsnmp(op, nmp, p);
|
|
NFSD_DEBUG(4, "deldsnmp=%p\n", ds);
|
|
if (ds != NULL) {
|
|
nfsrv_killrpcs(nmp);
|
|
NFSD_DEBUG(4, "aft killrpcs\n");
|
|
} else
|
|
error = ENXIO;
|
|
NFSLOCKMNT(nmp);
|
|
nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
|
|
wakeup(nmp);
|
|
NFSUNLOCKMNT(nmp);
|
|
} else
|
|
error = EINVAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Search for and remove a DS entry which matches the "nmp" argument.
|
|
* The nfsdevice structure pointer is returned so that the caller can
|
|
* free it via nfsrv_freeonedevid().
|
|
* For the forced case, do not try to do LayoutRecalls, since the server
|
|
* must be shut down now anyhow.
|
|
*/
|
|
struct nfsdevice *
|
|
nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p)
|
|
{
|
|
struct nfsdevice *fndds;
|
|
|
|
NFSD_DEBUG(4, "deldsdvp\n");
|
|
NFSDDSLOCK();
|
|
if (op == PNFSDOP_FORCEDELDS)
|
|
fndds = nfsv4_findmirror(nmp);
|
|
else
|
|
fndds = nfsrv_findmirroredds(nmp);
|
|
if (fndds != NULL)
|
|
nfsrv_deleteds(fndds);
|
|
NFSDDSUNLOCK();
|
|
if (fndds != NULL) {
|
|
if (op != PNFSDOP_FORCEDELDS)
|
|
nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p);
|
|
printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host);
|
|
}
|
|
return (fndds);
|
|
}
|
|
|
|
/*
|
|
* Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid.
|
|
* This function also calls nfsrv_killrpcs() to unblock RPCs on the mount
|
|
* point.
|
|
* Also, returns an error instead of the nfsdevice found.
|
|
*/
|
|
int
|
|
nfsrv_delds(char *devid, NFSPROC_T *p)
|
|
{
|
|
struct nfsdevice *ds, *fndds;
|
|
struct nfsmount *nmp;
|
|
int fndmirror;
|
|
|
|
NFSD_DEBUG(4, "delds\n");
|
|
/*
|
|
* Search the DS server list for a match with devid.
|
|
* Remove the DS entry if found and there is a mirror.
|
|
*/
|
|
fndds = NULL;
|
|
nmp = NULL;
|
|
fndmirror = 0;
|
|
NFSDDSLOCK();
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 &&
|
|
ds->nfsdev_nmp != NULL) {
|
|
NFSD_DEBUG(4, "fnd main ds\n");
|
|
fndds = ds;
|
|
break;
|
|
}
|
|
}
|
|
if (fndds == NULL) {
|
|
NFSDDSUNLOCK();
|
|
return (ENXIO);
|
|
}
|
|
if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0)
|
|
fndmirror = 1;
|
|
else if (fndds->nfsdev_mdsisset != 0) {
|
|
/* For the fsid is set case, search for a mirror. */
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (ds != fndds && ds->nfsdev_nmp != NULL &&
|
|
ds->nfsdev_mdsisset != 0 &&
|
|
fsidcmp(&ds->nfsdev_mdsfsid,
|
|
&fndds->nfsdev_mdsfsid) == 0) {
|
|
fndmirror = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (fndmirror != 0) {
|
|
nmp = fndds->nfsdev_nmp;
|
|
NFSLOCKMNT(nmp);
|
|
if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM |
|
|
NFSMNTP_CANCELRPCS)) == 0) {
|
|
nmp->nm_privflag |= NFSMNTP_CANCELRPCS;
|
|
NFSUNLOCKMNT(nmp);
|
|
nfsrv_deleteds(fndds);
|
|
} else {
|
|
NFSUNLOCKMNT(nmp);
|
|
nmp = NULL;
|
|
}
|
|
}
|
|
NFSDDSUNLOCK();
|
|
if (nmp != NULL) {
|
|
nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p);
|
|
printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host);
|
|
nfsrv_killrpcs(nmp);
|
|
NFSLOCKMNT(nmp);
|
|
nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
|
|
wakeup(nmp);
|
|
NFSUNLOCKMNT(nmp);
|
|
return (0);
|
|
}
|
|
return (ENXIO);
|
|
}
|
|
|
|
/*
|
|
* Mark a DS as disabled by setting nfsdev_nmp = NULL.
|
|
*/
|
|
static void
|
|
nfsrv_deleteds(struct nfsdevice *fndds)
|
|
{
|
|
|
|
NFSD_DEBUG(4, "deleteds: deleting a mirror\n");
|
|
fndds->nfsdev_nmp = NULL;
|
|
if (fndds->nfsdev_mdsisset == 0)
|
|
nfsrv_faildscnt--;
|
|
}
|
|
|
|
/*
|
|
* Fill in the addr structures for the File and Flex File layouts.
|
|
*/
|
|
static void
|
|
nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost)
|
|
{
|
|
uint32_t *tl;
|
|
char *netprot;
|
|
int addrlen;
|
|
static uint64_t new_devid = 0;
|
|
|
|
if (strchr(addr, ':') != NULL)
|
|
netprot = "tcp6";
|
|
else
|
|
netprot = "tcp";
|
|
|
|
/* Fill in the device id. */
|
|
NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time));
|
|
new_devid++;
|
|
NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)],
|
|
sizeof(new_devid));
|
|
|
|
/*
|
|
* Fill in the file addr (actually the nfsv4_file_layout_ds_addr4
|
|
* as defined in RFC5661) in XDR.
|
|
*/
|
|
addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) +
|
|
6 * NFSX_UNSIGNED;
|
|
NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot);
|
|
ds->nfsdev_fileaddrlen = addrlen;
|
|
tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO);
|
|
ds->nfsdev_fileaddr = (char *)tl;
|
|
*tl++ = txdr_unsigned(1); /* One stripe with index 0. */
|
|
*tl++ = 0;
|
|
*tl++ = txdr_unsigned(1); /* One multipath list */
|
|
*tl++ = txdr_unsigned(1); /* with one entry in it. */
|
|
/* The netaddr for this one entry. */
|
|
*tl++ = txdr_unsigned(strlen(netprot));
|
|
NFSBCOPY(netprot, tl, strlen(netprot));
|
|
tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(strlen(addr));
|
|
NFSBCOPY(addr, tl, strlen(addr));
|
|
|
|
/*
|
|
* Fill in the flex file addr (actually the ff_device_addr4
|
|
* as defined for Flexible File Layout) in XDR.
|
|
*/
|
|
addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) +
|
|
14 * NFSX_UNSIGNED;
|
|
ds->nfsdev_flexaddrlen = addrlen;
|
|
tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO);
|
|
ds->nfsdev_flexaddr = (char *)tl;
|
|
*tl++ = txdr_unsigned(1); /* One multipath entry. */
|
|
/* The netaddr for this one entry. */
|
|
*tl++ = txdr_unsigned(strlen(netprot));
|
|
NFSBCOPY(netprot, tl, strlen(netprot));
|
|
tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(strlen(addr));
|
|
NFSBCOPY(addr, tl, strlen(addr));
|
|
tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(2); /* Two NFS Versions. */
|
|
*tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */
|
|
*tl++ = txdr_unsigned(NFSV42_MINORVERSION); /* Minor version 2. */
|
|
*tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */
|
|
*tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */
|
|
*tl++ = newnfs_true; /* Tightly coupled. */
|
|
*tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */
|
|
*tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */
|
|
*tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */
|
|
*tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */
|
|
*tl = newnfs_true; /* Tightly coupled. */
|
|
|
|
ds->nfsdev_hostnamelen = strlen(dnshost);
|
|
ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE,
|
|
M_WAITOK);
|
|
NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1);
|
|
}
|
|
|
|
/*
|
|
* Create the device id list.
|
|
* Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument
|
|
* is misconfigured.
|
|
*/
|
|
int
|
|
nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p)
|
|
{
|
|
struct nfsdevice *ds;
|
|
char *addrp, *dnshostp, *dspathp, *mdspathp;
|
|
int error, i;
|
|
|
|
addrp = args->addr;
|
|
dnshostp = args->dnshost;
|
|
dspathp = args->dspath;
|
|
mdspathp = args->mdspath;
|
|
nfsrv_maxpnfsmirror = args->mirrorcnt;
|
|
if (addrp == NULL || dnshostp == NULL || dspathp == NULL ||
|
|
mdspathp == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Loop around for each nul-terminated string in args->addr,
|
|
* args->dnshost, args->dnspath and args->mdspath.
|
|
*/
|
|
while (addrp < (args->addr + args->addrlen) &&
|
|
dnshostp < (args->dnshost + args->dnshostlen) &&
|
|
dspathp < (args->dspath + args->dspathlen) &&
|
|
mdspathp < (args->mdspath + args->mdspathlen)) {
|
|
error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds);
|
|
if (error != 0) {
|
|
/* Free all DS servers. */
|
|
nfsrv_freealldevids();
|
|
nfsrv_devidcnt = 0;
|
|
return (ENXIO);
|
|
}
|
|
nfsrv_allocdevid(ds, addrp, dnshostp);
|
|
addrp += (strlen(addrp) + 1);
|
|
dnshostp += (strlen(dnshostp) + 1);
|
|
dspathp += (strlen(dspathp) + 1);
|
|
mdspathp += (strlen(mdspathp) + 1);
|
|
}
|
|
if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) {
|
|
/* Free all DS servers. */
|
|
nfsrv_freealldevids();
|
|
nfsrv_devidcnt = 0;
|
|
nfsrv_maxpnfsmirror = 1;
|
|
return (ENXIO);
|
|
}
|
|
/* We can fail at most one less DS than the mirror level. */
|
|
nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1;
|
|
|
|
/*
|
|
* Allocate the nfslayout hash table now, since this is a pNFS server.
|
|
* Make it 1% of the high water mark and at least 100.
|
|
*/
|
|
if (nfslayouthash == NULL) {
|
|
nfsrv_layouthashsize = nfsrv_layouthighwater / 100;
|
|
if (nfsrv_layouthashsize < 100)
|
|
nfsrv_layouthashsize = 100;
|
|
nfslayouthash = mallocarray(nfsrv_layouthashsize,
|
|
sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK |
|
|
M_ZERO);
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF);
|
|
TAILQ_INIT(&nfslayouthash[i].list);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free all device ids.
|
|
*/
|
|
static void
|
|
nfsrv_freealldevids(void)
|
|
{
|
|
struct nfsdevice *ds, *nds;
|
|
|
|
TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds)
|
|
nfsrv_freedevid(ds);
|
|
}
|
|
|
|
/*
|
|
* Check to see if there is a Read/Write Layout plus either:
|
|
* - A Write Delegation
|
|
* or
|
|
* - An Open with Write_access.
|
|
* Return 1 if this is the case and 0 otherwise.
|
|
* This function is used by nfsrv_proxyds() to decide if doing a Proxy
|
|
* Getattr RPC to the Data Server (DS) is necessary.
|
|
*/
|
|
#define NFSCLIDVECSIZE 6
|
|
int
|
|
nfsrv_checkdsattr(vnode_t vp, NFSPROC_T *p)
|
|
{
|
|
fhandle_t fh, *tfhp;
|
|
struct nfsstate *stp;
|
|
struct nfslayout *lyp;
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslockhashhead *hp;
|
|
struct nfslockfile *lfp;
|
|
nfsquad_t clid[NFSCLIDVECSIZE];
|
|
int clidcnt, ret;
|
|
|
|
ret = nfsvno_getfh(vp, &fh, p);
|
|
if (ret != 0)
|
|
return (0);
|
|
|
|
/* First check for a Read/Write Layout. */
|
|
clidcnt = 0;
|
|
lhyp = NFSLAYOUTHASH(&fh);
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH(lyp, &lhyp->list, lay_list) {
|
|
if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
|
|
((lyp->lay_flags & NFSLAY_RW) != 0 ||
|
|
((lyp->lay_flags & NFSLAY_READ) != 0 &&
|
|
nfsrv_pnfsatime != 0))) {
|
|
if (clidcnt < NFSCLIDVECSIZE)
|
|
clid[clidcnt].qval = lyp->lay_clientid.qval;
|
|
clidcnt++;
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
if (clidcnt == 0) {
|
|
/* None found, so return 0. */
|
|
return (0);
|
|
}
|
|
|
|
/* Get the nfslockfile for this fh. */
|
|
NFSLOCKSTATE();
|
|
hp = NFSLOCKHASH(&fh);
|
|
LIST_FOREACH(lfp, hp, lf_hash) {
|
|
tfhp = &lfp->lf_fh;
|
|
if (NFSVNO_CMPFH(&fh, tfhp))
|
|
break;
|
|
}
|
|
if (lfp == NULL) {
|
|
/* None found, so return 0. */
|
|
NFSUNLOCKSTATE();
|
|
return (0);
|
|
}
|
|
|
|
/* Now, look for a Write delegation for this clientid. */
|
|
LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) {
|
|
if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 &&
|
|
nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0)
|
|
break;
|
|
}
|
|
if (stp != NULL) {
|
|
/* Found one, so return 1. */
|
|
NFSUNLOCKSTATE();
|
|
return (1);
|
|
}
|
|
|
|
/* No Write delegation, so look for an Open with Write_access. */
|
|
LIST_FOREACH(stp, &lfp->lf_open, ls_file) {
|
|
KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0,
|
|
("nfsrv_checkdsattr: Non-open in Open list\n"));
|
|
if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 &&
|
|
nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0)
|
|
break;
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
if (stp != NULL)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Look for a matching clientid in the vector. Return 1 if one might match.
|
|
*/
|
|
static int
|
|
nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt)
|
|
{
|
|
int i;
|
|
|
|
/* If too many for the vector, return 1 since there might be a match. */
|
|
if (clidcnt > NFSCLIDVECSIZE)
|
|
return (1);
|
|
|
|
for (i = 0; i < clidcnt; i++)
|
|
if (clidvec[i].qval == clid.qval)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check the don't list for "vp" and see if issuing an rw layout is allowed.
|
|
* Return 1 if issuing an rw layout isn't allowed, 0 otherwise.
|
|
*/
|
|
static int
|
|
nfsrv_dontlayout(fhandle_t *fhp)
|
|
{
|
|
struct nfsdontlist *mrp;
|
|
int ret;
|
|
|
|
if (nfsrv_dontlistlen == 0)
|
|
return (0);
|
|
ret = 0;
|
|
NFSDDONTLISTLOCK();
|
|
LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) {
|
|
if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 &&
|
|
(mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
NFSDDONTLISTUNLOCK();
|
|
return (ret);
|
|
}
|
|
|
|
#define PNFSDS_COPYSIZ 65536
|
|
/*
|
|
* Create a new file on a DS and copy the contents of an extant DS file to it.
|
|
* This can be used for recovery of a DS file onto a recovered DS.
|
|
* The steps are:
|
|
* - When called, the MDS file's vnode is locked, blocking LayoutGet operations.
|
|
* - Disable issuing of read/write layouts for the file via the nfsdontlist,
|
|
* so that they will be disabled after the MDS file's vnode is unlocked.
|
|
* - Set up the nfsrv_recalllist so that recall of read/write layouts can
|
|
* be done.
|
|
* - Unlock the MDS file's vnode, so that the client(s) can perform proxied
|
|
* writes, LayoutCommits and LayoutReturns for the file when completing the
|
|
* LayoutReturn requested by the LayoutRecall callback.
|
|
* - Issue a LayoutRecall callback for all read/write layouts and wait for
|
|
* them to be returned. (If the LayoutRecall callback replies
|
|
* NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.)
|
|
* - Exclusively lock the MDS file's vnode. This ensures that no proxied
|
|
* writes are in progress or can occur during the DS file copy.
|
|
* It also blocks Setattr operations.
|
|
* - Create the file on the recovered mirror.
|
|
* - Copy the file from the operational DS.
|
|
* - Copy any ACL from the MDS file to the new DS file.
|
|
* - Set the modify time of the new DS file to that of the MDS file.
|
|
* - Update the extended attribute for the MDS file.
|
|
* - Enable issuing of rw layouts by deleting the nfsdontlist entry.
|
|
* - The caller will unlock the MDS file's vnode allowing operations
|
|
* to continue normally, since it is now on the mirror again.
|
|
*/
|
|
int
|
|
nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds,
|
|
struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt,
|
|
struct ucred *cred, NFSPROC_T *p)
|
|
{
|
|
struct nfsdontlist *mrp, *nmrp;
|
|
struct nfslayouthash *lhyp;
|
|
struct nfslayout *lyp, *nlyp;
|
|
struct nfslayouthead thl;
|
|
struct mount *mp, *tvmp;
|
|
struct acl *aclp;
|
|
struct vattr va;
|
|
struct timespec mtime;
|
|
fhandle_t fh;
|
|
vnode_t tvp;
|
|
off_t rdpos, wrpos;
|
|
ssize_t aresid;
|
|
char *dat;
|
|
int didprintf, ret, retacl, xfer;
|
|
|
|
ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp");
|
|
ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp");
|
|
/*
|
|
* Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag
|
|
* so that no more RW layouts will get issued.
|
|
*/
|
|
ret = nfsvno_getfh(vp, &fh, p);
|
|
if (ret != 0) {
|
|
NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret);
|
|
return (ret);
|
|
}
|
|
nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK);
|
|
nmrp->nfsmr_flags = NFSMR_DONTLAYOUT;
|
|
NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh));
|
|
NFSDDONTLISTLOCK();
|
|
LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) {
|
|
if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0)
|
|
break;
|
|
}
|
|
if (mrp == NULL) {
|
|
LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list);
|
|
mrp = nmrp;
|
|
nmrp = NULL;
|
|
nfsrv_dontlistlen++;
|
|
NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n");
|
|
} else {
|
|
NFSDDONTLISTUNLOCK();
|
|
free(nmrp, M_NFSDSTATE);
|
|
NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n");
|
|
return (ENXIO);
|
|
}
|
|
NFSDDONTLISTUNLOCK();
|
|
|
|
/*
|
|
* Search for all RW layouts for this file. Move them to the
|
|
* recall list, so they can be recalled and their return noted.
|
|
*/
|
|
lhyp = NFSLAYOUTHASH(&fh);
|
|
NFSDRECALLLOCK();
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
|
|
if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
|
|
(lyp->lay_flags & NFSLAY_RW) != 0) {
|
|
TAILQ_REMOVE(&lhyp->list, lyp, lay_list);
|
|
TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list);
|
|
lyp->lay_trycnt = 0;
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
NFSDRECALLUNLOCK();
|
|
|
|
ret = 0;
|
|
mp = tvmp = NULL;
|
|
didprintf = 0;
|
|
TAILQ_INIT(&thl);
|
|
/* Unlock the MDS vp, so that a LayoutReturn can be done on it. */
|
|
NFSVOPUNLOCK(vp);
|
|
/* Now, do a recall for all layouts not yet recalled. */
|
|
tryagain:
|
|
NFSDRECALLLOCK();
|
|
TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
|
|
if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 &&
|
|
(lyp->lay_flags & NFSLAY_RECALL) == 0) {
|
|
lyp->lay_flags |= NFSLAY_RECALL;
|
|
/*
|
|
* The layout stateid.seqid needs to be incremented
|
|
* before doing a LAYOUT_RECALL callback.
|
|
*/
|
|
if (++lyp->lay_stateid.seqid == 0)
|
|
lyp->lay_stateid.seqid = 1;
|
|
NFSDRECALLUNLOCK();
|
|
nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid,
|
|
&lyp->lay_fh, lyp, 0, lyp->lay_type, p);
|
|
NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n");
|
|
goto tryagain;
|
|
}
|
|
}
|
|
|
|
/* Now wait for them to be returned. */
|
|
tryagain2:
|
|
TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) {
|
|
if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) {
|
|
if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) {
|
|
TAILQ_REMOVE(&nfsrv_recalllisthead, lyp,
|
|
lay_list);
|
|
TAILQ_INSERT_HEAD(&thl, lyp, lay_list);
|
|
NFSD_DEBUG(4,
|
|
"nfsrv_copymr: layout returned\n");
|
|
} else {
|
|
lyp->lay_trycnt++;
|
|
ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR,
|
|
PVFS | PCATCH, "nfsmrl", hz);
|
|
NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n",
|
|
ret);
|
|
if (ret == EINTR || ret == ERESTART)
|
|
break;
|
|
if ((lyp->lay_flags & NFSLAY_RETURNED) == 0) {
|
|
/*
|
|
* Give up after 60sec and return
|
|
* ENXIO, failing the copymr.
|
|
* This layout will remain on the
|
|
* recalllist. It can only be cleared
|
|
* by restarting the nfsd.
|
|
* This seems the safe way to handle
|
|
* it, since it cannot be safely copied
|
|
* with an outstanding RW layout.
|
|
*/
|
|
if (lyp->lay_trycnt >= 60) {
|
|
ret = ENXIO;
|
|
break;
|
|
}
|
|
if (didprintf == 0) {
|
|
printf("nfsrv_copymr: layout "
|
|
"not returned\n");
|
|
didprintf = 1;
|
|
}
|
|
}
|
|
}
|
|
goto tryagain2;
|
|
}
|
|
}
|
|
NFSDRECALLUNLOCK();
|
|
/* We can now get rid of the layouts that have been returned. */
|
|
TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp)
|
|
nfsrv_freelayout(&thl, lyp);
|
|
|
|
/*
|
|
* Do the vn_start_write() calls here, before the MDS vnode is
|
|
* locked and the tvp is created (locked) in the NFS file system
|
|
* that dvp is in.
|
|
* For tvmp, this probably isn't necessary, since it will be an
|
|
* NFS mount and they are not suspendable at this time.
|
|
*/
|
|
if (ret == 0)
|
|
ret = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
|
|
if (ret == 0) {
|
|
tvmp = dvp->v_mount;
|
|
ret = vn_start_write(NULL, &tvmp, V_WAIT | V_PCATCH);
|
|
}
|
|
|
|
/*
|
|
* LK_EXCLUSIVE lock the MDS vnode, so that any
|
|
* proxied writes through the MDS will be blocked until we have
|
|
* completed the copy and update of the extended attributes.
|
|
* This will also ensure that any attributes and ACL will not be
|
|
* changed until the copy is complete.
|
|
*/
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (ret == 0 && VN_IS_DOOMED(vp)) {
|
|
NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n");
|
|
ret = ESTALE;
|
|
}
|
|
|
|
/* Create the data file on the recovered DS. */
|
|
if (ret == 0)
|
|
ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp);
|
|
|
|
/* Copy the DS file, if created successfully. */
|
|
if (ret == 0) {
|
|
/*
|
|
* Get any NFSv4 ACL on the MDS file, so that it can be set
|
|
* on the new DS file.
|
|
*/
|
|
aclp = acl_alloc(M_WAITOK | M_ZERO);
|
|
retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p);
|
|
if (retacl != 0 && retacl != ENOATTR)
|
|
NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl);
|
|
dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK);
|
|
/* Malloc a block of 0s used to check for holes. */
|
|
if (nfsrv_zeropnfsdat == NULL)
|
|
nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP,
|
|
M_WAITOK | M_ZERO);
|
|
rdpos = wrpos = 0;
|
|
ret = VOP_GETATTR(fvp, &va, cred);
|
|
aresid = 0;
|
|
while (ret == 0 && aresid == 0) {
|
|
ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ,
|
|
rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL,
|
|
&aresid, p);
|
|
xfer = PNFSDS_COPYSIZ - aresid;
|
|
if (ret == 0 && xfer > 0) {
|
|
rdpos += xfer;
|
|
/*
|
|
* Skip the write for holes, except for the
|
|
* last block.
|
|
*/
|
|
if (xfer < PNFSDS_COPYSIZ || rdpos ==
|
|
va.va_size || NFSBCMP(dat,
|
|
nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0)
|
|
ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer,
|
|
wrpos, UIO_SYSSPACE, IO_NODELOCKED,
|
|
cred, NULL, NULL, p);
|
|
if (ret == 0)
|
|
wrpos += xfer;
|
|
}
|
|
}
|
|
|
|
/* If there is an ACL and the copy succeeded, set the ACL. */
|
|
if (ret == 0 && retacl == 0) {
|
|
ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p);
|
|
/*
|
|
* Don't consider these as errors, since VOP_GETACL()
|
|
* can return an ACL when they are not actually
|
|
* supported. For example, for UFS, VOP_GETACL()
|
|
* will return a trivial ACL based on the uid/gid/mode
|
|
* when there is no ACL on the file.
|
|
* This case should be recognized as a trivial ACL
|
|
* by UFS's VOP_SETACL() and succeed, but...
|
|
*/
|
|
if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM)
|
|
ret = 0;
|
|
}
|
|
|
|
if (ret == 0)
|
|
ret = VOP_FSYNC(tvp, MNT_WAIT, p);
|
|
|
|
/* Set the DS data file's modify time that of the MDS file. */
|
|
if (ret == 0)
|
|
ret = VOP_GETATTR(vp, &va, cred);
|
|
if (ret == 0) {
|
|
mtime = va.va_mtime;
|
|
VATTR_NULL(&va);
|
|
va.va_mtime = mtime;
|
|
ret = VOP_SETATTR(tvp, &va, cred);
|
|
}
|
|
|
|
vput(tvp);
|
|
acl_free(aclp);
|
|
free(dat, M_TEMP);
|
|
}
|
|
if (tvmp != NULL)
|
|
vn_finished_write(tvmp);
|
|
|
|
/* Update the extended attributes for the newly created DS file. */
|
|
if (ret == 0)
|
|
ret = vn_extattr_set(vp, IO_NODELOCKED,
|
|
EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile",
|
|
sizeof(*wpf) * mirrorcnt, (char *)wpf, p);
|
|
if (mp != NULL)
|
|
vn_finished_write(mp);
|
|
|
|
/* Get rid of the dontlist entry, so that Layouts can be issued. */
|
|
NFSDDONTLISTLOCK();
|
|
LIST_REMOVE(mrp, nfsmr_list);
|
|
NFSDDONTLISTUNLOCK();
|
|
free(mrp, M_NFSDSTATE);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Create a data storage file on the recovered DS.
|
|
*/
|
|
static int
|
|
nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf,
|
|
vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p,
|
|
vnode_t *tvpp)
|
|
{
|
|
struct vattr va, nva;
|
|
int error;
|
|
|
|
/* Make data file name based on FH. */
|
|
error = VOP_GETATTR(vp, &va, cred);
|
|
if (error == 0) {
|
|
/* Set the attributes for "vp" to Setattr the DS vp. */
|
|
VATTR_NULL(&nva);
|
|
nva.va_uid = va.va_uid;
|
|
nva.va_gid = va.va_gid;
|
|
nva.va_mode = va.va_mode;
|
|
nva.va_size = 0;
|
|
VATTR_NULL(&va);
|
|
va.va_type = VREG;
|
|
va.va_mode = nva.va_mode;
|
|
NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf);
|
|
error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL,
|
|
pf->dsf_filename, cred, p, tvpp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Look up the MDS file shared locked, and then get the extended attribute
|
|
* to find the extant DS file to be copied to the new mirror.
|
|
* If successful, *vpp is set to the MDS file's vp and *nvpp is
|
|
* set to a DS data file for the MDS file, both exclusively locked.
|
|
* The "buf" argument has the pnfsdsfile structure from the MDS file
|
|
* in it and buflen is set to its length.
|
|
*/
|
|
int
|
|
nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf,
|
|
int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp,
|
|
struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp,
|
|
struct nfsdevice **fdsp)
|
|
{
|
|
struct nameidata nd;
|
|
struct vnode *vp, *curvp;
|
|
struct pnfsdsfile *pf;
|
|
struct nfsmount *nmp, *curnmp;
|
|
int dsdir, error, mirrorcnt, ippos;
|
|
|
|
vp = NULL;
|
|
curvp = NULL;
|
|
curnmp = NULL;
|
|
*dsp = NULL;
|
|
*fdsp = NULL;
|
|
if (dspathp == NULL && curdspathp != NULL)
|
|
return (EPERM);
|
|
|
|
/*
|
|
* Look up the MDS file shared locked. The lock will be upgraded
|
|
* to an exclusive lock after any rw layouts have been returned.
|
|
*/
|
|
NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
|
|
mdspathp);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "lookup=%d\n", error);
|
|
if (error != 0)
|
|
return (error);
|
|
if (nd.ni_vp->v_type != VREG) {
|
|
vput(nd.ni_vp);
|
|
NFSD_DEBUG(4, "mdspath not reg\n");
|
|
return (EISDIR);
|
|
}
|
|
vp = nd.ni_vp;
|
|
|
|
if (curdspathp != NULL) {
|
|
/*
|
|
* Look up the current DS path and find the nfsdev structure for
|
|
* it.
|
|
*/
|
|
NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
|
|
UIO_SYSSPACE, curdspathp);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "ds lookup=%d\n", error);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (nd.ni_vp->v_type != VDIR) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
NFSD_DEBUG(4, "curdspath not dir\n");
|
|
return (ENOTDIR);
|
|
}
|
|
if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
NFSD_DEBUG(4, "curdspath not an NFS mount\n");
|
|
return (ENXIO);
|
|
}
|
|
curnmp = VFSTONFS(nd.ni_vp->v_mount);
|
|
|
|
/* Search the nfsdev list for a match. */
|
|
NFSDDSLOCK();
|
|
*fdsp = nfsv4_findmirror(curnmp);
|
|
NFSDDSUNLOCK();
|
|
if (*fdsp == NULL)
|
|
curnmp = NULL;
|
|
if (curnmp == NULL) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
NFSD_DEBUG(4, "mdscopymr: no current ds\n");
|
|
return (ENXIO);
|
|
}
|
|
curvp = nd.ni_vp;
|
|
}
|
|
|
|
if (dspathp != NULL) {
|
|
/* Look up the nfsdev path and find the nfsdev structure. */
|
|
NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF,
|
|
UIO_SYSSPACE, dspathp);
|
|
error = namei(&nd);
|
|
NFSD_DEBUG(4, "ds lookup=%d\n", error);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
if (curvp != NULL)
|
|
vput(curvp);
|
|
return (error);
|
|
}
|
|
if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
if (curvp != NULL)
|
|
vput(curvp);
|
|
NFSD_DEBUG(4, "dspath not dir\n");
|
|
if (nd.ni_vp == curvp)
|
|
return (EPERM);
|
|
return (ENOTDIR);
|
|
}
|
|
if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
if (curvp != NULL)
|
|
vput(curvp);
|
|
NFSD_DEBUG(4, "dspath not an NFS mount\n");
|
|
return (ENXIO);
|
|
}
|
|
nmp = VFSTONFS(nd.ni_vp->v_mount);
|
|
|
|
/*
|
|
* Search the nfsdevice list for a match. If curnmp == NULL,
|
|
* this is a recovery and there must be a mirror.
|
|
*/
|
|
NFSDDSLOCK();
|
|
if (curnmp == NULL)
|
|
*dsp = nfsrv_findmirroredds(nmp);
|
|
else
|
|
*dsp = nfsv4_findmirror(nmp);
|
|
NFSDDSUNLOCK();
|
|
if (*dsp == NULL) {
|
|
vput(nd.ni_vp);
|
|
vput(vp);
|
|
if (curvp != NULL)
|
|
vput(curvp);
|
|
NFSD_DEBUG(4, "mdscopymr: no ds\n");
|
|
return (ENXIO);
|
|
}
|
|
} else {
|
|
nd.ni_vp = NULL;
|
|
nmp = NULL;
|
|
}
|
|
|
|
/*
|
|
* Get a vp for an available DS data file using the extended
|
|
* attribute on the MDS file.
|
|
* If there is a valid entry for the new DS in the extended attribute
|
|
* on the MDS file (as checked via the nmp argument),
|
|
* nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur.
|
|
*/
|
|
error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p,
|
|
NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir);
|
|
if (curvp != NULL)
|
|
vput(curvp);
|
|
if (nd.ni_vp == NULL) {
|
|
if (error == 0 && nmp != NULL) {
|
|
/* Search the nfsdev list for a match. */
|
|
NFSDDSLOCK();
|
|
*dsp = nfsrv_findmirroredds(nmp);
|
|
NFSDDSUNLOCK();
|
|
}
|
|
if (error == 0 && (nmp == NULL || *dsp == NULL)) {
|
|
if (nvpp != NULL && *nvpp != NULL) {
|
|
vput(*nvpp);
|
|
*nvpp = NULL;
|
|
}
|
|
error = ENXIO;
|
|
}
|
|
} else
|
|
vput(nd.ni_vp);
|
|
|
|
/*
|
|
* When dspathp != NULL and curdspathp == NULL, this is a recovery
|
|
* and is only allowed if there is a 0.0.0.0 IP address entry.
|
|
* When curdspathp != NULL, the ippos will be set to that entry.
|
|
*/
|
|
if (error == 0 && dspathp != NULL && ippos == -1) {
|
|
if (nvpp != NULL && *nvpp != NULL) {
|
|
vput(*nvpp);
|
|
*nvpp = NULL;
|
|
}
|
|
error = ENXIO;
|
|
}
|
|
if (error == 0) {
|
|
*vpp = vp;
|
|
|
|
pf = (struct pnfsdsfile *)buf;
|
|
if (ippos == -1) {
|
|
/* If no zeroip pnfsdsfile, add one. */
|
|
ippos = *buflenp / sizeof(*pf);
|
|
*buflenp += sizeof(*pf);
|
|
pf += ippos;
|
|
pf->dsf_dir = dsdir;
|
|
strlcpy(pf->dsf_filename, fname,
|
|
sizeof(pf->dsf_filename));
|
|
} else
|
|
pf += ippos;
|
|
*pfp = pf;
|
|
} else
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Search for a matching pnfsd mirror device structure, base on the nmp arg.
|
|
* Return one if found, NULL otherwise.
|
|
*/
|
|
static struct nfsdevice *
|
|
nfsrv_findmirroredds(struct nfsmount *nmp)
|
|
{
|
|
struct nfsdevice *ds, *fndds;
|
|
int fndmirror;
|
|
|
|
mtx_assert(NFSDDSMUTEXPTR, MA_OWNED);
|
|
/*
|
|
* Search the DS server list for a match with nmp.
|
|
* Remove the DS entry if found and there is a mirror.
|
|
*/
|
|
fndds = NULL;
|
|
fndmirror = 0;
|
|
if (nfsrv_devidcnt == 0)
|
|
return (fndds);
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (ds->nfsdev_nmp == nmp) {
|
|
NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n");
|
|
fndds = ds;
|
|
break;
|
|
}
|
|
}
|
|
if (fndds == NULL)
|
|
return (fndds);
|
|
if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0)
|
|
fndmirror = 1;
|
|
else if (fndds->nfsdev_mdsisset != 0) {
|
|
/* For the fsid is set case, search for a mirror. */
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (ds != fndds && ds->nfsdev_nmp != NULL &&
|
|
ds->nfsdev_mdsisset != 0 &&
|
|
fsidcmp(&ds->nfsdev_mdsfsid,
|
|
&fndds->nfsdev_mdsfsid) == 0) {
|
|
fndmirror = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (fndmirror == 0) {
|
|
NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n");
|
|
return (NULL);
|
|
}
|
|
return (fndds);
|
|
}
|
|
|
|
/*
|
|
* Mark the appropriate devid and all associated layout as "out of space".
|
|
*/
|
|
void
|
|
nfsrv_marknospc(char *devid, bool setit)
|
|
{
|
|
struct nfsdevice *ds;
|
|
struct nfslayout *lyp;
|
|
struct nfslayouthash *lhyp;
|
|
int i;
|
|
|
|
NFSDDSLOCK();
|
|
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
|
|
if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0) {
|
|
NFSD_DEBUG(1, "nfsrv_marknospc: devid %d\n", setit);
|
|
ds->nfsdev_nospc = setit;
|
|
}
|
|
}
|
|
NFSDDSUNLOCK();
|
|
|
|
for (i = 0; i < nfsrv_layouthashsize; i++) {
|
|
lhyp = &nfslayouthash[i];
|
|
NFSLOCKLAYOUT(lhyp);
|
|
TAILQ_FOREACH(lyp, &lhyp->list, lay_list) {
|
|
if (NFSBCMP(lyp->lay_deviceid, devid,
|
|
NFSX_V4DEVICEID) == 0) {
|
|
NFSD_DEBUG(1, "nfsrv_marknospc: layout %d\n",
|
|
setit);
|
|
if (setit)
|
|
lyp->lay_flags |= NFSLAY_NOSPC;
|
|
else
|
|
lyp->lay_flags &= ~NFSLAY_NOSPC;
|
|
}
|
|
}
|
|
NFSUNLOCKLAYOUT(lhyp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check to see if SP4_MACH_CRED is in use and, if it is, check that the
|
|
* correct machine credential is being used.
|
|
*/
|
|
static int
|
|
nfsrv_checkmachcred(int op, struct nfsrv_descript *nd, struct nfsclient *clp)
|
|
{
|
|
|
|
if ((clp->lc_flags & LCL_MACHCRED) == 0 ||
|
|
!NFSISSET_OPBIT(&clp->lc_mustops, op))
|
|
return (0);
|
|
KASSERT((nd->nd_flag & ND_NFSV41) != 0,
|
|
("nfsrv_checkmachcred: MachCred for NFSv4.0"));
|
|
if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_GSSPRIVACY)) != 0 &&
|
|
nd->nd_princlen == clp->lc_namelen &&
|
|
!NFSBCMP(nd->nd_principal, clp->lc_name, nd->nd_princlen))
|
|
return (0);
|
|
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
|
|
}
|