cbc978682d
Reviewed by kib MFC after: 2 weeks Sponsored by: iXsystems Differential Revision: D9009
3423 lines
86 KiB
C
3423 lines
86 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <sys/capsicum.h>
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/*
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* Functions that perform the vfs operations required by the routines in
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* nfsd_serv.c. It is hoped that this change will make the server more
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* portable.
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*/
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#include <fs/nfs/nfsport.h>
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#include <sys/hash.h>
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#include <sys/sysctl.h>
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#include <nlm/nlm_prot.h>
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#include <nlm/nlm.h>
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FEATURE(nfsd, "NFSv4 server");
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extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
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extern int nfsrv_useacl;
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extern int newnfs_numnfsd;
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extern struct mount nfsv4root_mnt;
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extern struct nfsrv_stablefirst nfsrv_stablefirst;
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extern void (*nfsd_call_servertimer)(void);
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extern SVCPOOL *nfsrvd_pool;
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extern struct nfsv4lock nfsd_suspend_lock;
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extern struct nfsclienthashhead *nfsclienthash;
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extern struct nfslockhashhead *nfslockhash;
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extern struct nfssessionhash *nfssessionhash;
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extern int nfsrv_sessionhashsize;
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extern struct nfsstatsv1 nfsstatsv1;
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struct vfsoptlist nfsv4root_opt, nfsv4root_newopt;
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NFSDLOCKMUTEX;
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struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE];
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struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE];
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struct mtx nfsrc_udpmtx;
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struct mtx nfs_v4root_mutex;
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struct nfsrvfh nfs_rootfh, nfs_pubfh;
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int nfs_pubfhset = 0, nfs_rootfhset = 0;
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struct proc *nfsd_master_proc = NULL;
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int nfsd_debuglevel = 0;
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static pid_t nfsd_master_pid = (pid_t)-1;
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static char nfsd_master_comm[MAXCOMLEN + 1];
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static struct timeval nfsd_master_start;
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static uint32_t nfsv4_sysid = 0;
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static int nfssvc_srvcall(struct thread *, struct nfssvc_args *,
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struct ucred *);
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int nfsrv_enable_crossmntpt = 1;
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static int nfs_commit_blks;
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static int nfs_commit_miss;
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extern int nfsrv_issuedelegs;
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extern int nfsrv_dolocallocks;
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extern int nfsd_enable_stringtouid;
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SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW,
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&nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks,
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0, "");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss,
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0, "");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW,
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&nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW,
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&nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel,
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0, "Debug level for NFS server");
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SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW,
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&nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names");
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#define MAX_REORDERED_RPC 16
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#define NUM_HEURISTIC 1031
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#define NHUSE_INIT 64
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#define NHUSE_INC 16
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#define NHUSE_MAX 2048
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static struct nfsheur {
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struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
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off_t nh_nextoff; /* next offset for sequential detection */
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int nh_use; /* use count for selection */
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int nh_seqcount; /* heuristic */
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} nfsheur[NUM_HEURISTIC];
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/*
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* Heuristic to detect sequential operation.
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*/
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static struct nfsheur *
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nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp)
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{
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struct nfsheur *nh;
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int hi, try;
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/* Locate best candidate. */
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try = 32;
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hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC;
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nh = &nfsheur[hi];
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while (try--) {
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if (nfsheur[hi].nh_vp == vp) {
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nh = &nfsheur[hi];
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break;
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}
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if (nfsheur[hi].nh_use > 0)
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--nfsheur[hi].nh_use;
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hi = (hi + 1) % NUM_HEURISTIC;
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if (nfsheur[hi].nh_use < nh->nh_use)
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nh = &nfsheur[hi];
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}
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/* Initialize hint if this is a new file. */
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if (nh->nh_vp != vp) {
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nh->nh_vp = vp;
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nh->nh_nextoff = uio->uio_offset;
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nh->nh_use = NHUSE_INIT;
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if (uio->uio_offset == 0)
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nh->nh_seqcount = 4;
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else
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nh->nh_seqcount = 1;
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}
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/* Calculate heuristic. */
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if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) ||
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uio->uio_offset == nh->nh_nextoff) {
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/* See comments in vfs_vnops.c:sequential_heuristic(). */
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nh->nh_seqcount += howmany(uio->uio_resid, 16384);
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if (nh->nh_seqcount > IO_SEQMAX)
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nh->nh_seqcount = IO_SEQMAX;
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} else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC *
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imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) {
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/* Probably a reordered RPC, leave seqcount alone. */
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} else if (nh->nh_seqcount > 1) {
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nh->nh_seqcount /= 2;
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} else {
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nh->nh_seqcount = 0;
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}
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nh->nh_use += NHUSE_INC;
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if (nh->nh_use > NHUSE_MAX)
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nh->nh_use = NHUSE_MAX;
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return (nh);
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}
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/*
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* Get attributes into nfsvattr structure.
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*/
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int
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nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
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struct thread *p, int vpislocked)
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{
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int error, lockedit = 0;
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if (vpislocked == 0) {
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/*
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* When vpislocked == 0, the vnode is either exclusively
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* locked by this thread or not locked by this thread.
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* As such, shared lock it, if not exclusively locked.
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*/
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if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) {
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lockedit = 1;
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NFSVOPLOCK(vp, LK_SHARED | LK_RETRY);
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}
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}
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error = VOP_GETATTR(vp, &nvap->na_vattr, cred);
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if (lockedit != 0)
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NFSVOPUNLOCK(vp, 0);
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NFSEXITCODE(error);
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return (error);
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}
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/*
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* Get a file handle for a vnode.
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*/
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int
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nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p)
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{
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int error;
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NFSBZERO((caddr_t)fhp, sizeof(fhandle_t));
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fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
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error = VOP_VPTOFH(vp, &fhp->fh_fid);
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NFSEXITCODE(error);
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return (error);
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}
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/*
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* Perform access checking for vnodes obtained from file handles that would
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* refer to files already opened by a Unix client. You cannot just use
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* vn_writechk() and VOP_ACCESSX() for two reasons.
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* 1 - You must check for exported rdonly as well as MNT_RDONLY for the write
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* case.
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* 2 - The owner is to be given access irrespective of mode bits for some
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* operations, so that processes that chmod after opening a file don't
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* break.
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*/
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int
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nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred,
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struct nfsexstuff *exp, struct thread *p, int override, int vpislocked,
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u_int32_t *supportedtypep)
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{
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struct vattr vattr;
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int error = 0, getret = 0;
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if (vpislocked == 0) {
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if (NFSVOPLOCK(vp, LK_SHARED) != 0) {
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error = EPERM;
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goto out;
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}
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}
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if (accmode & VWRITE) {
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/* Just vn_writechk() changed to check rdonly */
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/*
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* Disallow write attempts on read-only file systems;
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* unless the file is a socket or a block or character
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* device resident on the file system.
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*/
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if (NFSVNO_EXRDONLY(exp) ||
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(vp->v_mount->mnt_flag & MNT_RDONLY)) {
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switch (vp->v_type) {
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case VREG:
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case VDIR:
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case VLNK:
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error = EROFS;
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default:
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break;
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}
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}
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/*
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* If there's shared text associated with
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* the inode, try to free it up once. If
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* we fail, we can't allow writing.
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*/
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if (VOP_IS_TEXT(vp) && error == 0)
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error = ETXTBSY;
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}
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if (error != 0) {
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if (vpislocked == 0)
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NFSVOPUNLOCK(vp, 0);
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goto out;
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}
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/*
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* Should the override still be applied when ACLs are enabled?
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*/
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error = VOP_ACCESSX(vp, accmode, cred, p);
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if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) {
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/*
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* Try again with VEXPLICIT_DENY, to see if the test for
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* deletion is supported.
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*/
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error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p);
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if (error == 0) {
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if (vp->v_type == VDIR) {
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accmode &= ~(VDELETE | VDELETE_CHILD);
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accmode |= VWRITE;
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error = VOP_ACCESSX(vp, accmode, cred, p);
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} else if (supportedtypep != NULL) {
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*supportedtypep &= ~NFSACCESS_DELETE;
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}
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}
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}
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/*
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* Allow certain operations for the owner (reads and writes
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* on files that are already open).
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*/
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if (override != NFSACCCHK_NOOVERRIDE &&
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(error == EPERM || error == EACCES)) {
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if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT))
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error = 0;
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else if (override & NFSACCCHK_ALLOWOWNER) {
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getret = VOP_GETATTR(vp, &vattr, cred);
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if (getret == 0 && cred->cr_uid == vattr.va_uid)
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error = 0;
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}
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}
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if (vpislocked == 0)
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NFSVOPUNLOCK(vp, 0);
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out:
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NFSEXITCODE(error);
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return (error);
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}
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/*
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* Set attribute(s) vnop.
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*/
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int
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nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
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struct thread *p, struct nfsexstuff *exp)
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{
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int error;
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error = VOP_SETATTR(vp, &nvap->na_vattr, cred);
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NFSEXITCODE(error);
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return (error);
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}
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/*
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* Set up nameidata for a lookup() call and do it.
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*/
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int
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nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp,
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struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p,
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struct vnode **retdirp)
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{
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struct componentname *cnp = &ndp->ni_cnd;
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int i;
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struct iovec aiov;
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struct uio auio;
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int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen;
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int error = 0, crossmnt;
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char *cp;
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*retdirp = NULL;
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cnp->cn_nameptr = cnp->cn_pnbuf;
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ndp->ni_lcf = 0;
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/*
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* Extract and set starting directory.
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*/
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if (dp->v_type != VDIR) {
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if (islocked)
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vput(dp);
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else
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vrele(dp);
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nfsvno_relpathbuf(ndp);
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error = ENOTDIR;
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goto out1;
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}
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if (islocked)
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NFSVOPUNLOCK(dp, 0);
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VREF(dp);
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*retdirp = dp;
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if (NFSVNO_EXRDONLY(exp))
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cnp->cn_flags |= RDONLY;
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ndp->ni_segflg = UIO_SYSSPACE;
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crossmnt = 1;
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if (nd->nd_flag & ND_PUBLOOKUP) {
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ndp->ni_loopcnt = 0;
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if (cnp->cn_pnbuf[0] == '/') {
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vrele(dp);
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/*
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* Check for degenerate pathnames here, since lookup()
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* panics on them.
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*/
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for (i = 1; i < ndp->ni_pathlen; i++)
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if (cnp->cn_pnbuf[i] != '/')
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break;
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if (i == ndp->ni_pathlen) {
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error = NFSERR_ACCES;
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goto out;
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}
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dp = rootvnode;
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VREF(dp);
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}
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} else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) ||
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(nd->nd_flag & ND_NFSV4) == 0) {
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/*
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* Only cross mount points for NFSv4 when doing a
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* mount while traversing the file system above
|
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* the mount point, unless nfsrv_enable_crossmntpt is set.
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*/
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cnp->cn_flags |= NOCROSSMOUNT;
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crossmnt = 0;
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}
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|
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/*
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* Initialize for scan, set ni_startdir and bump ref on dp again
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* because lookup() will dereference ni_startdir.
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*/
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cnp->cn_thread = p;
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ndp->ni_startdir = dp;
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ndp->ni_rootdir = rootvnode;
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ndp->ni_topdir = NULL;
|
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|
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if (!lockleaf)
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cnp->cn_flags |= LOCKLEAF;
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for (;;) {
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cnp->cn_nameptr = cnp->cn_pnbuf;
|
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/*
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* Call lookup() to do the real work. If an error occurs,
|
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* ndp->ni_vp and ni_dvp are left uninitialized or NULL and
|
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* we do not have to dereference anything before returning.
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* In either case ni_startdir will be dereferenced and NULLed
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* out.
|
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*/
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error = lookup(ndp);
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if (error)
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break;
|
|
|
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/*
|
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* Check for encountering a symbolic link. Trivial
|
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* termination occurs if no symlink encountered.
|
|
*/
|
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if ((cnp->cn_flags & ISSYMLINK) == 0) {
|
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if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0)
|
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nfsvno_relpathbuf(ndp);
|
|
if (ndp->ni_vp && !lockleaf)
|
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NFSVOPUNLOCK(ndp->ni_vp, 0);
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break;
|
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}
|
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|
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/*
|
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* Validate symlink
|
|
*/
|
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if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
|
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NFSVOPUNLOCK(ndp->ni_dvp, 0);
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if (!(nd->nd_flag & ND_PUBLOOKUP)) {
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error = EINVAL;
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goto badlink2;
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}
|
|
|
|
if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
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error = ELOOP;
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goto badlink2;
|
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}
|
|
if (ndp->ni_pathlen > 1)
|
|
cp = uma_zalloc(namei_zone, M_WAITOK);
|
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else
|
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cp = cnp->cn_pnbuf;
|
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aiov.iov_base = cp;
|
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aiov.iov_len = MAXPATHLEN;
|
|
auio.uio_iov = &aiov;
|
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auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
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auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
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auio.uio_td = NULL;
|
|
auio.uio_resid = MAXPATHLEN;
|
|
error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
|
|
if (error) {
|
|
badlink1:
|
|
if (ndp->ni_pathlen > 1)
|
|
uma_zfree(namei_zone, cp);
|
|
badlink2:
|
|
vrele(ndp->ni_dvp);
|
|
vput(ndp->ni_vp);
|
|
break;
|
|
}
|
|
linklen = MAXPATHLEN - auio.uio_resid;
|
|
if (linklen == 0) {
|
|
error = ENOENT;
|
|
goto badlink1;
|
|
}
|
|
if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
|
|
error = ENAMETOOLONG;
|
|
goto badlink1;
|
|
}
|
|
|
|
/*
|
|
* Adjust or replace path
|
|
*/
|
|
if (ndp->ni_pathlen > 1) {
|
|
NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
|
|
uma_zfree(namei_zone, cnp->cn_pnbuf);
|
|
cnp->cn_pnbuf = cp;
|
|
} else
|
|
cnp->cn_pnbuf[linklen] = '\0';
|
|
ndp->ni_pathlen += linklen;
|
|
|
|
/*
|
|
* Cleanup refs for next loop and check if root directory
|
|
* should replace current directory. Normally ni_dvp
|
|
* becomes the new base directory and is cleaned up when
|
|
* we loop. Explicitly null pointers after invalidation
|
|
* to clarify operation.
|
|
*/
|
|
vput(ndp->ni_vp);
|
|
ndp->ni_vp = NULL;
|
|
|
|
if (cnp->cn_pnbuf[0] == '/') {
|
|
vrele(ndp->ni_dvp);
|
|
ndp->ni_dvp = ndp->ni_rootdir;
|
|
VREF(ndp->ni_dvp);
|
|
}
|
|
ndp->ni_startdir = ndp->ni_dvp;
|
|
ndp->ni_dvp = NULL;
|
|
}
|
|
if (!lockleaf)
|
|
cnp->cn_flags &= ~LOCKLEAF;
|
|
|
|
out:
|
|
if (error) {
|
|
nfsvno_relpathbuf(ndp);
|
|
ndp->ni_vp = NULL;
|
|
ndp->ni_dvp = NULL;
|
|
ndp->ni_startdir = NULL;
|
|
} else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
|
|
ndp->ni_dvp = NULL;
|
|
}
|
|
|
|
out1:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set up a pathname buffer and return a pointer to it and, optionally
|
|
* set a hash pointer.
|
|
*/
|
|
void
|
|
nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp)
|
|
{
|
|
struct componentname *cnp = &ndp->ni_cnd;
|
|
|
|
cnp->cn_flags |= (NOMACCHECK | HASBUF);
|
|
cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);
|
|
if (hashpp != NULL)
|
|
*hashpp = NULL;
|
|
*bufpp = cnp->cn_pnbuf;
|
|
}
|
|
|
|
/*
|
|
* Release the above path buffer, if not released by nfsvno_namei().
|
|
*/
|
|
void
|
|
nfsvno_relpathbuf(struct nameidata *ndp)
|
|
{
|
|
|
|
if ((ndp->ni_cnd.cn_flags & HASBUF) == 0)
|
|
panic("nfsrelpath");
|
|
uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
|
|
ndp->ni_cnd.cn_flags &= ~HASBUF;
|
|
}
|
|
|
|
/*
|
|
* Readlink vnode op into an mbuf list.
|
|
*/
|
|
int
|
|
nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p,
|
|
struct mbuf **mpp, struct mbuf **mpendp, int *lenp)
|
|
{
|
|
struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
|
|
struct iovec *ivp = iv;
|
|
struct uio io, *uiop = &io;
|
|
struct mbuf *mp, *mp2 = NULL, *mp3 = NULL;
|
|
int i, len, tlen, error = 0;
|
|
|
|
len = 0;
|
|
i = 0;
|
|
while (len < NFS_MAXPATHLEN) {
|
|
NFSMGET(mp);
|
|
MCLGET(mp, M_WAITOK);
|
|
mp->m_len = M_SIZE(mp);
|
|
if (len == 0) {
|
|
mp3 = mp2 = mp;
|
|
} else {
|
|
mp2->m_next = mp;
|
|
mp2 = mp;
|
|
}
|
|
if ((len + mp->m_len) > NFS_MAXPATHLEN) {
|
|
mp->m_len = NFS_MAXPATHLEN - len;
|
|
len = NFS_MAXPATHLEN;
|
|
} else {
|
|
len += mp->m_len;
|
|
}
|
|
ivp->iov_base = mtod(mp, caddr_t);
|
|
ivp->iov_len = mp->m_len;
|
|
i++;
|
|
ivp++;
|
|
}
|
|
uiop->uio_iov = iv;
|
|
uiop->uio_iovcnt = i;
|
|
uiop->uio_offset = 0;
|
|
uiop->uio_resid = len;
|
|
uiop->uio_rw = UIO_READ;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
uiop->uio_td = NULL;
|
|
error = VOP_READLINK(vp, uiop, cred);
|
|
if (error) {
|
|
m_freem(mp3);
|
|
*lenp = 0;
|
|
goto out;
|
|
}
|
|
if (uiop->uio_resid > 0) {
|
|
len -= uiop->uio_resid;
|
|
tlen = NFSM_RNDUP(len);
|
|
nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len);
|
|
}
|
|
*lenp = len;
|
|
*mpp = mp3;
|
|
*mpendp = mp;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Read vnode op call into mbuf list.
|
|
*/
|
|
int
|
|
nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred,
|
|
struct thread *p, struct mbuf **mpp, struct mbuf **mpendp)
|
|
{
|
|
struct mbuf *m;
|
|
int i;
|
|
struct iovec *iv;
|
|
struct iovec *iv2;
|
|
int error = 0, len, left, siz, tlen, ioflag = 0;
|
|
struct mbuf *m2 = NULL, *m3;
|
|
struct uio io, *uiop = &io;
|
|
struct nfsheur *nh;
|
|
|
|
len = left = NFSM_RNDUP(cnt);
|
|
m3 = NULL;
|
|
/*
|
|
* Generate the mbuf list with the uio_iov ref. to it.
|
|
*/
|
|
i = 0;
|
|
while (left > 0) {
|
|
NFSMGET(m);
|
|
MCLGET(m, M_WAITOK);
|
|
m->m_len = 0;
|
|
siz = min(M_TRAILINGSPACE(m), left);
|
|
left -= siz;
|
|
i++;
|
|
if (m3)
|
|
m2->m_next = m;
|
|
else
|
|
m3 = m;
|
|
m2 = m;
|
|
}
|
|
MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
|
|
M_TEMP, M_WAITOK);
|
|
uiop->uio_iov = iv2 = iv;
|
|
m = m3;
|
|
left = len;
|
|
i = 0;
|
|
while (left > 0) {
|
|
if (m == NULL)
|
|
panic("nfsvno_read iov");
|
|
siz = min(M_TRAILINGSPACE(m), left);
|
|
if (siz > 0) {
|
|
iv->iov_base = mtod(m, caddr_t) + m->m_len;
|
|
iv->iov_len = siz;
|
|
m->m_len += siz;
|
|
left -= siz;
|
|
iv++;
|
|
i++;
|
|
}
|
|
m = m->m_next;
|
|
}
|
|
uiop->uio_iovcnt = i;
|
|
uiop->uio_offset = off;
|
|
uiop->uio_resid = len;
|
|
uiop->uio_rw = UIO_READ;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
uiop->uio_td = NULL;
|
|
nh = nfsrv_sequential_heuristic(uiop, vp);
|
|
ioflag |= nh->nh_seqcount << IO_SEQSHIFT;
|
|
/* XXX KDM make this more systematic? */
|
|
nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid;
|
|
error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred);
|
|
FREE((caddr_t)iv2, M_TEMP);
|
|
if (error) {
|
|
m_freem(m3);
|
|
*mpp = NULL;
|
|
goto out;
|
|
}
|
|
nh->nh_nextoff = uiop->uio_offset;
|
|
tlen = len - uiop->uio_resid;
|
|
cnt = cnt < tlen ? cnt : tlen;
|
|
tlen = NFSM_RNDUP(cnt);
|
|
if (tlen == 0) {
|
|
m_freem(m3);
|
|
m3 = NULL;
|
|
} else if (len != tlen || tlen != cnt)
|
|
nfsrv_adj(m3, len - tlen, tlen - cnt);
|
|
*mpp = m3;
|
|
*mpendp = m2;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Write vnode op from an mbuf list.
|
|
*/
|
|
int
|
|
nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable,
|
|
struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p)
|
|
{
|
|
struct iovec *ivp;
|
|
int i, len;
|
|
struct iovec *iv;
|
|
int ioflags, error;
|
|
struct uio io, *uiop = &io;
|
|
struct nfsheur *nh;
|
|
|
|
MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
|
|
M_WAITOK);
|
|
uiop->uio_iov = iv = ivp;
|
|
uiop->uio_iovcnt = cnt;
|
|
i = mtod(mp, caddr_t) + mp->m_len - cp;
|
|
len = retlen;
|
|
while (len > 0) {
|
|
if (mp == NULL)
|
|
panic("nfsvno_write");
|
|
if (i > 0) {
|
|
i = min(i, len);
|
|
ivp->iov_base = cp;
|
|
ivp->iov_len = i;
|
|
ivp++;
|
|
len -= i;
|
|
}
|
|
mp = mp->m_next;
|
|
if (mp) {
|
|
i = mp->m_len;
|
|
cp = mtod(mp, caddr_t);
|
|
}
|
|
}
|
|
|
|
if (stable == NFSWRITE_UNSTABLE)
|
|
ioflags = IO_NODELOCKED;
|
|
else
|
|
ioflags = (IO_SYNC | IO_NODELOCKED);
|
|
uiop->uio_resid = retlen;
|
|
uiop->uio_rw = UIO_WRITE;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
NFSUIOPROC(uiop, p);
|
|
uiop->uio_offset = off;
|
|
nh = nfsrv_sequential_heuristic(uiop, vp);
|
|
ioflags |= nh->nh_seqcount << IO_SEQSHIFT;
|
|
/* XXX KDM make this more systematic? */
|
|
nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid;
|
|
error = VOP_WRITE(vp, uiop, ioflags, cred);
|
|
if (error == 0)
|
|
nh->nh_nextoff = uiop->uio_offset;
|
|
FREE((caddr_t)iv, M_TEMP);
|
|
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common code for creating a regular file (plus special files for V2).
|
|
*/
|
|
int
|
|
nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp,
|
|
struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp,
|
|
int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
u_quad_t tempsize;
|
|
int error;
|
|
|
|
error = nd->nd_repstat;
|
|
if (!error && ndp->ni_vp == NULL) {
|
|
if (nvap->na_type == VREG || nvap->na_type == VSOCK) {
|
|
vrele(ndp->ni_startdir);
|
|
error = VOP_CREATE(ndp->ni_dvp,
|
|
&ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
if (!error) {
|
|
if (*exclusive_flagp) {
|
|
*exclusive_flagp = 0;
|
|
NFSVNO_ATTRINIT(nvap);
|
|
nvap->na_atime.tv_sec = cverf[0];
|
|
nvap->na_atime.tv_nsec = cverf[1];
|
|
error = VOP_SETATTR(ndp->ni_vp,
|
|
&nvap->na_vattr, nd->nd_cred);
|
|
if (error != 0) {
|
|
vput(ndp->ni_vp);
|
|
ndp->ni_vp = NULL;
|
|
error = NFSERR_NOTSUPP;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* NFS V2 Only. nfsrvd_mknod() does this for V3.
|
|
* (This implies, just get out on an error.)
|
|
*/
|
|
} else if (nvap->na_type == VCHR || nvap->na_type == VBLK ||
|
|
nvap->na_type == VFIFO) {
|
|
if (nvap->na_type == VCHR && rdev == 0xffffffff)
|
|
nvap->na_type = VFIFO;
|
|
if (nvap->na_type != VFIFO &&
|
|
(error = priv_check_cred(nd->nd_cred,
|
|
PRIV_VFS_MKNOD_DEV, 0))) {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vput(ndp->ni_dvp);
|
|
goto out;
|
|
}
|
|
nvap->na_rdev = rdev;
|
|
error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
|
|
&ndp->ni_cnd, &nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
vrele(ndp->ni_startdir);
|
|
if (error)
|
|
goto out;
|
|
} else {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vput(ndp->ni_dvp);
|
|
error = ENXIO;
|
|
goto out;
|
|
}
|
|
*vpp = ndp->ni_vp;
|
|
} else {
|
|
/*
|
|
* Handle cases where error is already set and/or
|
|
* the file exists.
|
|
* 1 - clean up the lookup
|
|
* 2 - iff !error and na_size set, truncate it
|
|
*/
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
*vpp = ndp->ni_vp;
|
|
if (ndp->ni_dvp == *vpp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
if (!error && nvap->na_size != VNOVAL) {
|
|
error = nfsvno_accchk(*vpp, VWRITE,
|
|
nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
|
|
NFSACCCHK_VPISLOCKED, NULL);
|
|
if (!error) {
|
|
tempsize = nvap->na_size;
|
|
NFSVNO_ATTRINIT(nvap);
|
|
nvap->na_size = tempsize;
|
|
error = VOP_SETATTR(*vpp,
|
|
&nvap->na_vattr, nd->nd_cred);
|
|
}
|
|
}
|
|
if (error)
|
|
vput(*vpp);
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do a mknod vnode op.
|
|
*/
|
|
int
|
|
nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred,
|
|
struct thread *p)
|
|
{
|
|
int error = 0;
|
|
enum vtype vtyp;
|
|
|
|
vtyp = nvap->na_type;
|
|
/*
|
|
* Iff doesn't exist, create it.
|
|
*/
|
|
if (ndp->ni_vp) {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vput(ndp->ni_dvp);
|
|
vrele(ndp->ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vput(ndp->ni_dvp);
|
|
error = NFSERR_BADTYPE;
|
|
goto out;
|
|
}
|
|
if (vtyp == VSOCK) {
|
|
vrele(ndp->ni_startdir);
|
|
error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp,
|
|
&ndp->ni_cnd, &nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
} else {
|
|
if (nvap->na_type != VFIFO &&
|
|
(error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vput(ndp->ni_dvp);
|
|
goto out;
|
|
}
|
|
error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
|
|
&ndp->ni_cnd, &nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
vrele(ndp->ni_startdir);
|
|
/*
|
|
* Since VOP_MKNOD returns the ni_vp, I can't
|
|
* see any reason to do the lookup.
|
|
*/
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Mkdir vnode op.
|
|
*/
|
|
int
|
|
nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid,
|
|
struct ucred *cred, struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
int error = 0;
|
|
|
|
if (ndp->ni_vp != NULL) {
|
|
if (ndp->ni_dvp == ndp->ni_vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
vrele(ndp->ni_vp);
|
|
nfsvno_relpathbuf(ndp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
|
|
&nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* symlink vnode op.
|
|
*/
|
|
int
|
|
nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp,
|
|
int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p,
|
|
struct nfsexstuff *exp)
|
|
{
|
|
int error = 0;
|
|
|
|
if (ndp->ni_vp) {
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
if (ndp->ni_dvp == ndp->ni_vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
vrele(ndp->ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
|
|
&nvap->na_vattr, pathcp);
|
|
vput(ndp->ni_dvp);
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
/*
|
|
* Although FreeBSD still had the lookup code in
|
|
* it for 7/current, there doesn't seem to be any
|
|
* point, since VOP_SYMLINK() returns the ni_vp.
|
|
* Just vput it for v2.
|
|
*/
|
|
if (!not_v2 && !error)
|
|
vput(ndp->ni_vp);
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Parse symbolic link arguments.
|
|
* This function has an ugly side effect. It will MALLOC() an area for
|
|
* the symlink and set iov_base to point to it, only if it succeeds.
|
|
* So, if it returns with uiop->uio_iov->iov_base != NULL, that must
|
|
* be FREE'd later.
|
|
*/
|
|
int
|
|
nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap,
|
|
struct thread *p, char **pathcpp, int *lenp)
|
|
{
|
|
u_int32_t *tl;
|
|
char *pathcp = NULL;
|
|
int error = 0, len;
|
|
struct nfsv2_sattr *sp;
|
|
|
|
*pathcpp = NULL;
|
|
*lenp = 0;
|
|
if ((nd->nd_flag & ND_NFSV3) &&
|
|
(error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p)))
|
|
goto nfsmout;
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
len = fxdr_unsigned(int, *tl);
|
|
if (len > NFS_MAXPATHLEN || len <= 0) {
|
|
error = EBADRPC;
|
|
goto nfsmout;
|
|
}
|
|
MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK);
|
|
error = nfsrv_mtostr(nd, pathcp, len);
|
|
if (error)
|
|
goto nfsmout;
|
|
if (nd->nd_flag & ND_NFSV2) {
|
|
NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
|
|
}
|
|
*pathcpp = pathcp;
|
|
*lenp = len;
|
|
NFSEXITCODE2(0, nd);
|
|
return (0);
|
|
nfsmout:
|
|
if (pathcp)
|
|
free(pathcp, M_TEMP);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a non-directory object.
|
|
*/
|
|
int
|
|
nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred,
|
|
struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
struct vnode *vp;
|
|
int error = 0;
|
|
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type == VDIR)
|
|
error = NFSERR_ISDIR;
|
|
else if (is_v4)
|
|
error = nfsrv_checkremove(vp, 1, p);
|
|
if (!error)
|
|
error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd);
|
|
if (ndp->ni_dvp == vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
vput(vp);
|
|
if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0)
|
|
nfsvno_relpathbuf(ndp);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory.
|
|
*/
|
|
int
|
|
nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred,
|
|
struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
struct vnode *vp;
|
|
int error = 0;
|
|
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (ndp->ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT)
|
|
error = EBUSY;
|
|
out:
|
|
if (!error)
|
|
error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd);
|
|
if (ndp->ni_dvp == vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
vput(vp);
|
|
if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0)
|
|
nfsvno_relpathbuf(ndp);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename vnode op.
|
|
*/
|
|
int
|
|
nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp,
|
|
u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p)
|
|
{
|
|
struct vnode *fvp, *tvp, *tdvp;
|
|
int error = 0;
|
|
|
|
fvp = fromndp->ni_vp;
|
|
if (ndstat) {
|
|
vrele(fromndp->ni_dvp);
|
|
vrele(fvp);
|
|
error = ndstat;
|
|
goto out1;
|
|
}
|
|
tdvp = tondp->ni_dvp;
|
|
tvp = tondp->ni_vp;
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST;
|
|
goto out;
|
|
}
|
|
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
|
|
error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* A rename to '.' or '..' results in a prematurely
|
|
* unlocked vnode on FreeBSD5, so I'm just going to fail that
|
|
* here.
|
|
*/
|
|
if ((tondp->ni_cnd.cn_namelen == 1 &&
|
|
tondp->ni_cnd.cn_nameptr[0] == '.') ||
|
|
(tondp->ni_cnd.cn_namelen == 2 &&
|
|
tondp->ni_cnd.cn_nameptr[0] == '.' &&
|
|
tondp->ni_cnd.cn_nameptr[1] == '.')) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
|
|
error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
|
|
goto out;
|
|
}
|
|
if (fvp->v_mount != tdvp->v_mount) {
|
|
error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
|
|
goto out;
|
|
}
|
|
if (fvp == tdvp) {
|
|
error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL;
|
|
goto out;
|
|
}
|
|
if (fvp == tvp) {
|
|
/*
|
|
* If source and destination are the same, there is nothing to
|
|
* do. Set error to -1 to indicate this.
|
|
*/
|
|
error = -1;
|
|
goto out;
|
|
}
|
|
if (ndflag & ND_NFSV4) {
|
|
if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) {
|
|
error = nfsrv_checkremove(fvp, 0, p);
|
|
NFSVOPUNLOCK(fvp, 0);
|
|
} else
|
|
error = EPERM;
|
|
if (tvp && !error)
|
|
error = nfsrv_checkremove(tvp, 1, p);
|
|
} else {
|
|
/*
|
|
* For NFSv2 and NFSv3, try to get rid of the delegation, so
|
|
* that the NFSv4 client won't be confused by the rename.
|
|
* Since nfsd_recalldelegation() can only be called on an
|
|
* unlocked vnode at this point and fvp is the file that will
|
|
* still exist after the rename, just do fvp.
|
|
*/
|
|
nfsd_recalldelegation(fvp, p);
|
|
}
|
|
out:
|
|
if (!error) {
|
|
error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp,
|
|
&fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp,
|
|
&tondp->ni_cnd);
|
|
} else {
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
vrele(fromndp->ni_dvp);
|
|
vrele(fvp);
|
|
if (error == -1)
|
|
error = 0;
|
|
}
|
|
vrele(tondp->ni_startdir);
|
|
nfsvno_relpathbuf(tondp);
|
|
out1:
|
|
vrele(fromndp->ni_startdir);
|
|
nfsvno_relpathbuf(fromndp);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Link vnode op.
|
|
*/
|
|
int
|
|
nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred,
|
|
struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
struct vnode *xp;
|
|
int error = 0;
|
|
|
|
xp = ndp->ni_vp;
|
|
if (xp != NULL) {
|
|
error = EEXIST;
|
|
} else {
|
|
xp = ndp->ni_dvp;
|
|
if (vp->v_mount != xp->v_mount)
|
|
error = EXDEV;
|
|
}
|
|
if (!error) {
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if ((vp->v_iflag & VI_DOOMED) == 0)
|
|
error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd);
|
|
else
|
|
error = EPERM;
|
|
if (ndp->ni_dvp == vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
NFSVOPUNLOCK(vp, 0);
|
|
} else {
|
|
if (ndp->ni_dvp == ndp->ni_vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
if (ndp->ni_vp)
|
|
vrele(ndp->ni_vp);
|
|
}
|
|
nfsvno_relpathbuf(ndp);
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do the fsync() appropriate for the commit.
|
|
*/
|
|
int
|
|
nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
int error = 0;
|
|
|
|
/*
|
|
* RFC 1813 3.3.21: if count is 0, a flush from offset to the end of
|
|
* file is done. At this time VOP_FSYNC does not accept offset and
|
|
* byte count parameters so call VOP_FSYNC the whole file for now.
|
|
* The same is true for NFSv4: RFC 3530 Sec. 14.2.3.
|
|
* File systems that do not use the buffer cache (as indicated
|
|
* by MNTK_USES_BCACHE not being set) must use VOP_FSYNC().
|
|
*/
|
|
if (cnt == 0 || cnt > MAX_COMMIT_COUNT ||
|
|
(vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) {
|
|
/*
|
|
* Give up and do the whole thing
|
|
*/
|
|
if (vp->v_object &&
|
|
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
|
|
VM_OBJECT_WLOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
|
|
VM_OBJECT_WUNLOCK(vp->v_object);
|
|
}
|
|
error = VOP_FSYNC(vp, MNT_WAIT, td);
|
|
} else {
|
|
/*
|
|
* Locate and synchronously write any buffers that fall
|
|
* into the requested range. Note: we are assuming that
|
|
* f_iosize is a power of 2.
|
|
*/
|
|
int iosize = vp->v_mount->mnt_stat.f_iosize;
|
|
int iomask = iosize - 1;
|
|
struct bufobj *bo;
|
|
daddr_t lblkno;
|
|
|
|
/*
|
|
* Align to iosize boundary, super-align to page boundary.
|
|
*/
|
|
if (off & iomask) {
|
|
cnt += off & iomask;
|
|
off &= ~(u_quad_t)iomask;
|
|
}
|
|
if (off & PAGE_MASK) {
|
|
cnt += off & PAGE_MASK;
|
|
off &= ~(u_quad_t)PAGE_MASK;
|
|
}
|
|
lblkno = off / iosize;
|
|
|
|
if (vp->v_object &&
|
|
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
|
|
VM_OBJECT_WLOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, off, off + cnt,
|
|
OBJPC_SYNC);
|
|
VM_OBJECT_WUNLOCK(vp->v_object);
|
|
}
|
|
|
|
bo = &vp->v_bufobj;
|
|
BO_LOCK(bo);
|
|
while (cnt > 0) {
|
|
struct buf *bp;
|
|
|
|
/*
|
|
* If we have a buffer and it is marked B_DELWRI we
|
|
* have to lock and write it. Otherwise the prior
|
|
* write is assumed to have already been committed.
|
|
*
|
|
* gbincore() can return invalid buffers now so we
|
|
* have to check that bit as well (though B_DELWRI
|
|
* should not be set if B_INVAL is set there could be
|
|
* a race here since we haven't locked the buffer).
|
|
*/
|
|
if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) {
|
|
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL |
|
|
LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) {
|
|
BO_LOCK(bo);
|
|
continue; /* retry */
|
|
}
|
|
if ((bp->b_flags & (B_DELWRI|B_INVAL)) ==
|
|
B_DELWRI) {
|
|
bremfree(bp);
|
|
bp->b_flags &= ~B_ASYNC;
|
|
bwrite(bp);
|
|
++nfs_commit_miss;
|
|
} else
|
|
BUF_UNLOCK(bp);
|
|
BO_LOCK(bo);
|
|
}
|
|
++nfs_commit_blks;
|
|
if (cnt < iosize)
|
|
break;
|
|
cnt -= iosize;
|
|
++lblkno;
|
|
}
|
|
BO_UNLOCK(bo);
|
|
}
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Statfs vnode op.
|
|
*/
|
|
int
|
|
nfsvno_statfs(struct vnode *vp, struct statfs *sf)
|
|
{
|
|
int error;
|
|
|
|
error = VFS_STATFS(vp->v_mount, sf);
|
|
if (error == 0) {
|
|
/*
|
|
* Since NFS handles these values as unsigned on the
|
|
* wire, there is no way to represent negative values,
|
|
* so set them to 0. Without this, they will appear
|
|
* to be very large positive values for clients like
|
|
* Solaris10.
|
|
*/
|
|
if (sf->f_bavail < 0)
|
|
sf->f_bavail = 0;
|
|
if (sf->f_ffree < 0)
|
|
sf->f_ffree = 0;
|
|
}
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but
|
|
* must handle nfsrv_opencheck() calls after any other access checks.
|
|
*/
|
|
void
|
|
nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp,
|
|
nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp,
|
|
int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create,
|
|
NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p,
|
|
struct nfsexstuff *exp, struct vnode **vpp)
|
|
{
|
|
struct vnode *vp = NULL;
|
|
u_quad_t tempsize;
|
|
struct nfsexstuff nes;
|
|
|
|
if (ndp->ni_vp == NULL)
|
|
nd->nd_repstat = nfsrv_opencheck(clientid,
|
|
stateidp, stp, NULL, nd, p, nd->nd_repstat);
|
|
if (!nd->nd_repstat) {
|
|
if (ndp->ni_vp == NULL) {
|
|
vrele(ndp->ni_startdir);
|
|
nd->nd_repstat = VOP_CREATE(ndp->ni_dvp,
|
|
&ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
|
|
vput(ndp->ni_dvp);
|
|
nfsvno_relpathbuf(ndp);
|
|
if (!nd->nd_repstat) {
|
|
if (*exclusive_flagp) {
|
|
*exclusive_flagp = 0;
|
|
NFSVNO_ATTRINIT(nvap);
|
|
nvap->na_atime.tv_sec = cverf[0];
|
|
nvap->na_atime.tv_nsec = cverf[1];
|
|
nd->nd_repstat = VOP_SETATTR(ndp->ni_vp,
|
|
&nvap->na_vattr, cred);
|
|
if (nd->nd_repstat != 0) {
|
|
vput(ndp->ni_vp);
|
|
ndp->ni_vp = NULL;
|
|
nd->nd_repstat = NFSERR_NOTSUPP;
|
|
}
|
|
} else {
|
|
nfsrv_fixattr(nd, ndp->ni_vp, nvap,
|
|
aclp, p, attrbitp, exp);
|
|
}
|
|
}
|
|
vp = ndp->ni_vp;
|
|
} else {
|
|
if (ndp->ni_startdir)
|
|
vrele(ndp->ni_startdir);
|
|
nfsvno_relpathbuf(ndp);
|
|
vp = ndp->ni_vp;
|
|
if (create == NFSV4OPEN_CREATE) {
|
|
if (ndp->ni_dvp == vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
}
|
|
if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) {
|
|
if (ndp->ni_cnd.cn_flags & RDONLY)
|
|
NFSVNO_SETEXRDONLY(&nes);
|
|
else
|
|
NFSVNO_EXINIT(&nes);
|
|
nd->nd_repstat = nfsvno_accchk(vp,
|
|
VWRITE, cred, &nes, p,
|
|
NFSACCCHK_NOOVERRIDE,
|
|
NFSACCCHK_VPISLOCKED, NULL);
|
|
nd->nd_repstat = nfsrv_opencheck(clientid,
|
|
stateidp, stp, vp, nd, p, nd->nd_repstat);
|
|
if (!nd->nd_repstat) {
|
|
tempsize = nvap->na_size;
|
|
NFSVNO_ATTRINIT(nvap);
|
|
nvap->na_size = tempsize;
|
|
nd->nd_repstat = VOP_SETATTR(vp,
|
|
&nvap->na_vattr, cred);
|
|
}
|
|
} else if (vp->v_type == VREG) {
|
|
nd->nd_repstat = nfsrv_opencheck(clientid,
|
|
stateidp, stp, vp, nd, p, nd->nd_repstat);
|
|
}
|
|
}
|
|
} else {
|
|
if (ndp->ni_cnd.cn_flags & HASBUF)
|
|
nfsvno_relpathbuf(ndp);
|
|
if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) {
|
|
vrele(ndp->ni_startdir);
|
|
if (ndp->ni_dvp == ndp->ni_vp)
|
|
vrele(ndp->ni_dvp);
|
|
else
|
|
vput(ndp->ni_dvp);
|
|
if (ndp->ni_vp)
|
|
vput(ndp->ni_vp);
|
|
}
|
|
}
|
|
*vpp = vp;
|
|
|
|
NFSEXITCODE2(0, nd);
|
|
}
|
|
|
|
/*
|
|
* Updates the file rev and sets the mtime and ctime
|
|
* to the current clock time, returning the va_filerev and va_Xtime
|
|
* values.
|
|
* Return ESTALE to indicate the vnode is VI_DOOMED.
|
|
*/
|
|
int
|
|
nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap,
|
|
struct ucred *cred, struct thread *p)
|
|
{
|
|
struct vattr va;
|
|
|
|
VATTR_NULL(&va);
|
|
vfs_timestamp(&va.va_mtime);
|
|
if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if ((vp->v_iflag & VI_DOOMED) != 0)
|
|
return (ESTALE);
|
|
}
|
|
(void) VOP_SETATTR(vp, &va, cred);
|
|
(void) nfsvno_getattr(vp, nvap, cred, p, 1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Glue routine to nfsv4_fillattr().
|
|
*/
|
|
int
|
|
nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp,
|
|
struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp,
|
|
struct ucred *cred, struct thread *p, int isdgram, int reterr,
|
|
int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno)
|
|
{
|
|
int error;
|
|
|
|
error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror,
|
|
attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root,
|
|
mounted_on_fileno);
|
|
NFSEXITCODE2(0, nd);
|
|
return (error);
|
|
}
|
|
|
|
/* Since the Readdir vnode ops vary, put the entire functions in here. */
|
|
/*
|
|
* nfs readdir service
|
|
* - mallocs what it thinks is enough to read
|
|
* count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR
|
|
* - calls VOP_READDIR()
|
|
* - loops around building the reply
|
|
* if the output generated exceeds count break out of loop
|
|
* The NFSM_CLGET macro is used here so that the reply will be packed
|
|
* tightly in mbuf clusters.
|
|
* - it trims out records with d_fileno == 0
|
|
* this doesn't matter for Unix clients, but they might confuse clients
|
|
* for other os'.
|
|
* - it trims out records with d_type == DT_WHT
|
|
* these cannot be seen through NFS (unless we extend the protocol)
|
|
* The alternate call nfsrvd_readdirplus() does lookups as well.
|
|
* PS: The NFS protocol spec. does not clarify what the "count" byte
|
|
* argument is a count of.. just name strings and file id's or the
|
|
* entire reply rpc or ...
|
|
* I tried just file name and id sizes and it confused the Sun client,
|
|
* so I am using the full rpc size now. The "paranoia.." comment refers
|
|
* to including the status longwords that are not a part of the dir.
|
|
* "entry" structures, but are in the rpc.
|
|
*/
|
|
int
|
|
nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram,
|
|
struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
struct dirent *dp;
|
|
u_int32_t *tl;
|
|
int dirlen;
|
|
char *cpos, *cend, *rbuf;
|
|
struct nfsvattr at;
|
|
int nlen, error = 0, getret = 1;
|
|
int siz, cnt, fullsiz, eofflag, ncookies;
|
|
u_int64_t off, toff, verf;
|
|
u_long *cookies = NULL, *cookiep;
|
|
struct uio io;
|
|
struct iovec iv;
|
|
int is_ufs;
|
|
|
|
if (nd->nd_repstat) {
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
if (nd->nd_flag & ND_NFSV2) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
off = fxdr_unsigned(u_quad_t, *tl++);
|
|
} else {
|
|
NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
|
|
off = fxdr_hyper(tl);
|
|
tl += 2;
|
|
verf = fxdr_hyper(tl);
|
|
tl += 2;
|
|
}
|
|
toff = off;
|
|
cnt = fxdr_unsigned(int, *tl);
|
|
if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
|
|
cnt = NFS_SRVMAXDATA(nd);
|
|
siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
|
|
fullsiz = siz;
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred,
|
|
p, 1);
|
|
#if 0
|
|
/*
|
|
* va_filerev is not sufficient as a cookie verifier,
|
|
* since it is not supposed to change when entries are
|
|
* removed/added unless that offset cookies returned to
|
|
* the client are no longer valid.
|
|
*/
|
|
if (!nd->nd_repstat && toff && verf != at.na_filerev)
|
|
nd->nd_repstat = NFSERR_BAD_COOKIE;
|
|
#endif
|
|
}
|
|
if (!nd->nd_repstat && vp->v_type != VDIR)
|
|
nd->nd_repstat = NFSERR_NOTDIR;
|
|
if (nd->nd_repstat == 0 && cnt == 0) {
|
|
if (nd->nd_flag & ND_NFSV2)
|
|
/* NFSv2 does not have NFSERR_TOOSMALL */
|
|
nd->nd_repstat = EPERM;
|
|
else
|
|
nd->nd_repstat = NFSERR_TOOSMALL;
|
|
}
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
|
|
nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
|
|
NFSACCCHK_VPISLOCKED, NULL);
|
|
if (nd->nd_repstat) {
|
|
vput(vp);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0;
|
|
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
|
|
again:
|
|
eofflag = 0;
|
|
if (cookies) {
|
|
free((caddr_t)cookies, M_TEMP);
|
|
cookies = NULL;
|
|
}
|
|
|
|
iv.iov_base = rbuf;
|
|
iv.iov_len = siz;
|
|
io.uio_iov = &iv;
|
|
io.uio_iovcnt = 1;
|
|
io.uio_offset = (off_t)off;
|
|
io.uio_resid = siz;
|
|
io.uio_segflg = UIO_SYSSPACE;
|
|
io.uio_rw = UIO_READ;
|
|
io.uio_td = NULL;
|
|
nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
|
|
&cookies);
|
|
off = (u_int64_t)io.uio_offset;
|
|
if (io.uio_resid)
|
|
siz -= io.uio_resid;
|
|
|
|
if (!cookies && !nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_PERM;
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = getret;
|
|
}
|
|
|
|
/*
|
|
* Handles the failed cases. nd->nd_repstat == 0 past here.
|
|
*/
|
|
if (nd->nd_repstat) {
|
|
vput(vp);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
if (cookies)
|
|
free((caddr_t)cookies, M_TEMP);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
/*
|
|
* If nothing read, return eof
|
|
* rpc reply
|
|
*/
|
|
if (siz == 0) {
|
|
vput(vp);
|
|
if (nd->nd_flag & ND_NFSV2) {
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
} else {
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.na_filerev, tl);
|
|
tl += 2;
|
|
}
|
|
*tl++ = newnfs_false;
|
|
*tl = newnfs_true;
|
|
FREE((caddr_t)rbuf, M_TEMP);
|
|
FREE((caddr_t)cookies, M_TEMP);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Check for degenerate cases of nothing useful read.
|
|
* If so go try again
|
|
*/
|
|
cpos = rbuf;
|
|
cend = rbuf + siz;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep = cookies;
|
|
|
|
/*
|
|
* For some reason FreeBSD's ufs_readdir() chooses to back the
|
|
* directory offset up to a block boundary, so it is necessary to
|
|
* skip over the records that precede the requested offset. This
|
|
* requires the assumption that file offset cookies monotonically
|
|
* increase.
|
|
*/
|
|
while (cpos < cend && ncookies > 0 &&
|
|
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
|
|
(is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) {
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (cpos >= cend || ncookies == 0) {
|
|
siz = fullsiz;
|
|
toff = off;
|
|
goto again;
|
|
}
|
|
vput(vp);
|
|
|
|
/*
|
|
* dirlen is the size of the reply, including all XDR and must
|
|
* not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate
|
|
* if the XDR should be included in "count", but to be safe, we do.
|
|
* (Include the two booleans at the end of the reply in dirlen now.)
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.na_filerev, tl);
|
|
dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
|
|
} else {
|
|
dirlen = 2 * NFSX_UNSIGNED;
|
|
}
|
|
|
|
/* Loop through the records and build reply */
|
|
while (cpos < cend && ncookies > 0) {
|
|
nlen = dp->d_namlen;
|
|
if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
|
|
nlen <= NFS_MAXNAMLEN) {
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
|
|
else
|
|
dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
|
|
if (dirlen > cnt) {
|
|
eofflag = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Build the directory record xdr from
|
|
* the dirent entry.
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_true;
|
|
*tl++ = 0;
|
|
} else {
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_true;
|
|
}
|
|
*tl = txdr_unsigned(dp->d_fileno);
|
|
(void) nfsm_strtom(nd, dp->d_name, nlen);
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = 0;
|
|
} else
|
|
NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
*tl = txdr_unsigned(*cookiep);
|
|
}
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (cpos < cend)
|
|
eofflag = 0;
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_false;
|
|
if (eofflag)
|
|
*tl = newnfs_true;
|
|
else
|
|
*tl = newnfs_false;
|
|
FREE((caddr_t)rbuf, M_TEMP);
|
|
FREE((caddr_t)cookies, M_TEMP);
|
|
|
|
out:
|
|
NFSEXITCODE2(0, nd);
|
|
return (0);
|
|
nfsmout:
|
|
vput(vp);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Readdirplus for V3 and Readdir for V4.
|
|
*/
|
|
int
|
|
nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
|
|
struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
|
|
{
|
|
struct dirent *dp;
|
|
u_int32_t *tl;
|
|
int dirlen;
|
|
char *cpos, *cend, *rbuf;
|
|
struct vnode *nvp;
|
|
fhandle_t nfh;
|
|
struct nfsvattr nva, at, *nvap = &nva;
|
|
struct mbuf *mb0, *mb1;
|
|
struct nfsreferral *refp;
|
|
int nlen, r, error = 0, getret = 1, usevget = 1;
|
|
int siz, cnt, fullsiz, eofflag, ncookies, entrycnt;
|
|
caddr_t bpos0, bpos1;
|
|
u_int64_t off, toff, verf;
|
|
u_long *cookies = NULL, *cookiep;
|
|
nfsattrbit_t attrbits, rderrbits, savbits;
|
|
struct uio io;
|
|
struct iovec iv;
|
|
struct componentname cn;
|
|
int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls;
|
|
struct mount *mp, *new_mp;
|
|
uint64_t mounted_on_fileno;
|
|
|
|
if (nd->nd_repstat) {
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
|
|
off = fxdr_hyper(tl);
|
|
toff = off;
|
|
tl += 2;
|
|
verf = fxdr_hyper(tl);
|
|
tl += 2;
|
|
siz = fxdr_unsigned(int, *tl++);
|
|
cnt = fxdr_unsigned(int, *tl);
|
|
|
|
/*
|
|
* Use the server's maximum data transfer size as the upper bound
|
|
* on reply datalen.
|
|
*/
|
|
if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
|
|
cnt = NFS_SRVMAXDATA(nd);
|
|
|
|
/*
|
|
* siz is a "hint" of how much directory information (name, fileid,
|
|
* cookie) should be in the reply. At least one client "hints" 0,
|
|
* so I set it to cnt for that case. I also round it up to the
|
|
* next multiple of DIRBLKSIZ.
|
|
*/
|
|
if (siz <= 0)
|
|
siz = cnt;
|
|
siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
|
|
|
|
if (nd->nd_flag & ND_NFSV4) {
|
|
error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
|
|
if (error)
|
|
goto nfsmout;
|
|
NFSSET_ATTRBIT(&savbits, &attrbits);
|
|
NFSCLRNOTFILLABLE_ATTRBIT(&attrbits);
|
|
NFSZERO_ATTRBIT(&rderrbits);
|
|
NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR);
|
|
} else {
|
|
NFSZERO_ATTRBIT(&attrbits);
|
|
}
|
|
fullsiz = siz;
|
|
nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
|
|
if (!nd->nd_repstat) {
|
|
if (off && verf != at.na_filerev) {
|
|
/*
|
|
* va_filerev is not sufficient as a cookie verifier,
|
|
* since it is not supposed to change when entries are
|
|
* removed/added unless that offset cookies returned to
|
|
* the client are no longer valid.
|
|
*/
|
|
#if 0
|
|
if (nd->nd_flag & ND_NFSV4) {
|
|
nd->nd_repstat = NFSERR_NOTSAME;
|
|
} else {
|
|
nd->nd_repstat = NFSERR_BAD_COOKIE;
|
|
}
|
|
#endif
|
|
} else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) {
|
|
nd->nd_repstat = NFSERR_BAD_COOKIE;
|
|
}
|
|
}
|
|
if (!nd->nd_repstat && vp->v_type != VDIR)
|
|
nd->nd_repstat = NFSERR_NOTDIR;
|
|
if (!nd->nd_repstat && cnt == 0)
|
|
nd->nd_repstat = NFSERR_TOOSMALL;
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
|
|
nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
|
|
NFSACCCHK_VPISLOCKED, NULL);
|
|
if (nd->nd_repstat) {
|
|
vput(vp);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0;
|
|
is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0;
|
|
|
|
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
|
|
again:
|
|
eofflag = 0;
|
|
if (cookies) {
|
|
free((caddr_t)cookies, M_TEMP);
|
|
cookies = NULL;
|
|
}
|
|
|
|
iv.iov_base = rbuf;
|
|
iv.iov_len = siz;
|
|
io.uio_iov = &iv;
|
|
io.uio_iovcnt = 1;
|
|
io.uio_offset = (off_t)off;
|
|
io.uio_resid = siz;
|
|
io.uio_segflg = UIO_SYSSPACE;
|
|
io.uio_rw = UIO_READ;
|
|
io.uio_td = NULL;
|
|
nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
|
|
&cookies);
|
|
off = (u_int64_t)io.uio_offset;
|
|
if (io.uio_resid)
|
|
siz -= io.uio_resid;
|
|
|
|
getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
|
|
|
|
if (!cookies && !nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_PERM;
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = getret;
|
|
if (nd->nd_repstat) {
|
|
vput(vp);
|
|
if (cookies)
|
|
free((caddr_t)cookies, M_TEMP);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
/*
|
|
* If nothing read, return eof
|
|
* rpc reply
|
|
*/
|
|
if (siz == 0) {
|
|
vput(vp);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.na_filerev, tl);
|
|
tl += 2;
|
|
*tl++ = newnfs_false;
|
|
*tl = newnfs_true;
|
|
free((caddr_t)cookies, M_TEMP);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Check for degenerate cases of nothing useful read.
|
|
* If so go try again
|
|
*/
|
|
cpos = rbuf;
|
|
cend = rbuf + siz;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep = cookies;
|
|
|
|
/*
|
|
* For some reason FreeBSD's ufs_readdir() chooses to back the
|
|
* directory offset up to a block boundary, so it is necessary to
|
|
* skip over the records that precede the requested offset. This
|
|
* requires the assumption that file offset cookies monotonically
|
|
* increase.
|
|
*/
|
|
while (cpos < cend && ncookies > 0 &&
|
|
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
|
|
(is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) ||
|
|
((nd->nd_flag & ND_NFSV4) &&
|
|
((dp->d_namlen == 1 && dp->d_name[0] == '.') ||
|
|
(dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) {
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (cpos >= cend || ncookies == 0) {
|
|
siz = fullsiz;
|
|
toff = off;
|
|
goto again;
|
|
}
|
|
|
|
/*
|
|
* Busy the file system so that the mount point won't go away
|
|
* and, as such, VFS_VGET() can be used safely.
|
|
*/
|
|
mp = vp->v_mount;
|
|
vfs_ref(mp);
|
|
NFSVOPUNLOCK(vp, 0);
|
|
nd->nd_repstat = vfs_busy(mp, 0);
|
|
vfs_rel(mp);
|
|
if (nd->nd_repstat != 0) {
|
|
vrele(vp);
|
|
free(cookies, M_TEMP);
|
|
free(rbuf, M_TEMP);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* For now ZFS requires VOP_LOOKUP as a workaround. Until ino_t is changed
|
|
* to 64 bit type a ZFS filesystem with over 1 billion files in it
|
|
* will suffer from 64bit -> 32bit truncation.
|
|
*/
|
|
if (is_zfs == 1)
|
|
usevget = 0;
|
|
|
|
cn.cn_nameiop = LOOKUP;
|
|
cn.cn_lkflags = LK_SHARED | LK_RETRY;
|
|
cn.cn_cred = nd->nd_cred;
|
|
cn.cn_thread = p;
|
|
|
|
/*
|
|
* Save this position, in case there is an error before one entry
|
|
* is created.
|
|
*/
|
|
mb0 = nd->nd_mb;
|
|
bpos0 = nd->nd_bpos;
|
|
|
|
/*
|
|
* Fill in the first part of the reply.
|
|
* dirlen is the reply length in bytes and cannot exceed cnt.
|
|
* (Include the two booleans at the end of the reply in dirlen now,
|
|
* so we recognize when we have exceeded cnt.)
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
} else {
|
|
dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED;
|
|
}
|
|
NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
|
|
txdr_hyper(at.na_filerev, tl);
|
|
|
|
/*
|
|
* Save this position, in case there is an empty reply needed.
|
|
*/
|
|
mb1 = nd->nd_mb;
|
|
bpos1 = nd->nd_bpos;
|
|
|
|
/* Loop through the records and build reply */
|
|
entrycnt = 0;
|
|
while (cpos < cend && ncookies > 0 && dirlen < cnt) {
|
|
nlen = dp->d_namlen;
|
|
if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
|
|
nlen <= NFS_MAXNAMLEN &&
|
|
((nd->nd_flag & ND_NFSV3) || nlen > 2 ||
|
|
(nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.'))
|
|
|| (nlen == 1 && dp->d_name[0] != '.'))) {
|
|
/*
|
|
* Save the current position in the reply, in case
|
|
* this entry exceeds cnt.
|
|
*/
|
|
mb1 = nd->nd_mb;
|
|
bpos1 = nd->nd_bpos;
|
|
|
|
/*
|
|
* For readdir_and_lookup get the vnode using
|
|
* the file number.
|
|
*/
|
|
nvp = NULL;
|
|
refp = NULL;
|
|
r = 0;
|
|
at_root = 0;
|
|
needs_unbusy = 0;
|
|
new_mp = mp;
|
|
mounted_on_fileno = (uint64_t)dp->d_fileno;
|
|
if ((nd->nd_flag & ND_NFSV3) ||
|
|
NFSNONZERO_ATTRBIT(&savbits)) {
|
|
if (nd->nd_flag & ND_NFSV4)
|
|
refp = nfsv4root_getreferral(NULL,
|
|
vp, dp->d_fileno);
|
|
if (refp == NULL) {
|
|
if (usevget)
|
|
r = VFS_VGET(mp, dp->d_fileno,
|
|
LK_SHARED, &nvp);
|
|
else
|
|
r = EOPNOTSUPP;
|
|
if (r == EOPNOTSUPP) {
|
|
usevget = 0;
|
|
cn.cn_nameptr = dp->d_name;
|
|
cn.cn_namelen = nlen;
|
|
cn.cn_flags = ISLASTCN |
|
|
NOFOLLOW | LOCKLEAF;
|
|
if (nlen == 2 &&
|
|
dp->d_name[0] == '.' &&
|
|
dp->d_name[1] == '.')
|
|
cn.cn_flags |=
|
|
ISDOTDOT;
|
|
if (NFSVOPLOCK(vp, LK_SHARED)
|
|
!= 0) {
|
|
nd->nd_repstat = EPERM;
|
|
break;
|
|
}
|
|
if ((vp->v_vflag & VV_ROOT) != 0
|
|
&& (cn.cn_flags & ISDOTDOT)
|
|
!= 0) {
|
|
vref(vp);
|
|
nvp = vp;
|
|
r = 0;
|
|
} else {
|
|
r = VOP_LOOKUP(vp, &nvp,
|
|
&cn);
|
|
if (vp != nvp)
|
|
NFSVOPUNLOCK(vp,
|
|
0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For NFSv4, check to see if nvp is
|
|
* a mount point and get the mount
|
|
* point vnode, as required.
|
|
*/
|
|
if (r == 0 &&
|
|
nfsrv_enable_crossmntpt != 0 &&
|
|
(nd->nd_flag & ND_NFSV4) != 0 &&
|
|
nvp->v_type == VDIR &&
|
|
nvp->v_mountedhere != NULL) {
|
|
new_mp = nvp->v_mountedhere;
|
|
r = vfs_busy(new_mp, 0);
|
|
vput(nvp);
|
|
nvp = NULL;
|
|
if (r == 0) {
|
|
r = VFS_ROOT(new_mp,
|
|
LK_SHARED, &nvp);
|
|
needs_unbusy = 1;
|
|
if (r == 0)
|
|
at_root = 1;
|
|
}
|
|
}
|
|
}
|
|
if (!r) {
|
|
if (refp == NULL &&
|
|
((nd->nd_flag & ND_NFSV3) ||
|
|
NFSNONZERO_ATTRBIT(&attrbits))) {
|
|
r = nfsvno_getfh(nvp, &nfh, p);
|
|
if (!r)
|
|
r = nfsvno_getattr(nvp, nvap,
|
|
nd->nd_cred, p, 1);
|
|
if (r == 0 && is_zfs == 1 &&
|
|
nfsrv_enable_crossmntpt != 0 &&
|
|
(nd->nd_flag & ND_NFSV4) != 0 &&
|
|
nvp->v_type == VDIR &&
|
|
vp->v_mount != nvp->v_mount) {
|
|
/*
|
|
* For a ZFS snapshot, there is a
|
|
* pseudo mount that does not set
|
|
* v_mountedhere, so it needs to
|
|
* be detected via a different
|
|
* mount structure.
|
|
*/
|
|
at_root = 1;
|
|
if (new_mp == mp)
|
|
new_mp = nvp->v_mount;
|
|
}
|
|
}
|
|
} else {
|
|
nvp = NULL;
|
|
}
|
|
if (r) {
|
|
if (!NFSISSET_ATTRBIT(&attrbits,
|
|
NFSATTRBIT_RDATTRERROR)) {
|
|
if (nvp != NULL)
|
|
vput(nvp);
|
|
if (needs_unbusy != 0)
|
|
vfs_unbusy(new_mp);
|
|
nd->nd_repstat = r;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Build the directory record xdr
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_true;
|
|
*tl++ = 0;
|
|
*tl = txdr_unsigned(dp->d_fileno);
|
|
dirlen += nfsm_strtom(nd, dp->d_name, nlen);
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = 0;
|
|
*tl = txdr_unsigned(*cookiep);
|
|
nfsrv_postopattr(nd, 0, nvap);
|
|
dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1);
|
|
dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR);
|
|
if (nvp != NULL)
|
|
vput(nvp);
|
|
} else {
|
|
NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_true;
|
|
*tl++ = 0;
|
|
*tl = txdr_unsigned(*cookiep);
|
|
dirlen += nfsm_strtom(nd, dp->d_name, nlen);
|
|
if (nvp != NULL) {
|
|
supports_nfsv4acls =
|
|
nfs_supportsnfsv4acls(nvp);
|
|
NFSVOPUNLOCK(nvp, 0);
|
|
} else
|
|
supports_nfsv4acls = 0;
|
|
if (refp != NULL) {
|
|
dirlen += nfsrv_putreferralattr(nd,
|
|
&savbits, refp, 0,
|
|
&nd->nd_repstat);
|
|
if (nd->nd_repstat) {
|
|
if (nvp != NULL)
|
|
vrele(nvp);
|
|
if (needs_unbusy != 0)
|
|
vfs_unbusy(new_mp);
|
|
break;
|
|
}
|
|
} else if (r) {
|
|
dirlen += nfsvno_fillattr(nd, new_mp,
|
|
nvp, nvap, &nfh, r, &rderrbits,
|
|
nd->nd_cred, p, isdgram, 0,
|
|
supports_nfsv4acls, at_root,
|
|
mounted_on_fileno);
|
|
} else {
|
|
dirlen += nfsvno_fillattr(nd, new_mp,
|
|
nvp, nvap, &nfh, r, &attrbits,
|
|
nd->nd_cred, p, isdgram, 0,
|
|
supports_nfsv4acls, at_root,
|
|
mounted_on_fileno);
|
|
}
|
|
if (nvp != NULL)
|
|
vrele(nvp);
|
|
dirlen += (3 * NFSX_UNSIGNED);
|
|
}
|
|
if (needs_unbusy != 0)
|
|
vfs_unbusy(new_mp);
|
|
if (dirlen <= cnt)
|
|
entrycnt++;
|
|
}
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
vrele(vp);
|
|
vfs_unbusy(mp);
|
|
|
|
/*
|
|
* If dirlen > cnt, we must strip off the last entry. If that
|
|
* results in an empty reply, report NFSERR_TOOSMALL.
|
|
*/
|
|
if (dirlen > cnt || nd->nd_repstat) {
|
|
if (!nd->nd_repstat && entrycnt == 0)
|
|
nd->nd_repstat = NFSERR_TOOSMALL;
|
|
if (nd->nd_repstat) {
|
|
newnfs_trimtrailing(nd, mb0, bpos0);
|
|
if (nd->nd_flag & ND_NFSV3)
|
|
nfsrv_postopattr(nd, getret, &at);
|
|
} else
|
|
newnfs_trimtrailing(nd, mb1, bpos1);
|
|
eofflag = 0;
|
|
} else if (cpos < cend)
|
|
eofflag = 0;
|
|
if (!nd->nd_repstat) {
|
|
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = newnfs_false;
|
|
if (eofflag)
|
|
*tl = newnfs_true;
|
|
else
|
|
*tl = newnfs_false;
|
|
}
|
|
FREE((caddr_t)cookies, M_TEMP);
|
|
FREE((caddr_t)rbuf, M_TEMP);
|
|
|
|
out:
|
|
NFSEXITCODE2(0, nd);
|
|
return (0);
|
|
nfsmout:
|
|
vput(vp);
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get the settable attributes out of the mbuf list.
|
|
* (Return 0 or EBADRPC)
|
|
*/
|
|
int
|
|
nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap,
|
|
nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
|
|
{
|
|
u_int32_t *tl;
|
|
struct nfsv2_sattr *sp;
|
|
int error = 0, toclient = 0;
|
|
|
|
switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) {
|
|
case ND_NFSV2:
|
|
NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
/*
|
|
* Some old clients didn't fill in the high order 16bits.
|
|
* --> check the low order 2 bytes for 0xffff
|
|
*/
|
|
if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
|
|
nvap->na_mode = nfstov_mode(sp->sa_mode);
|
|
if (sp->sa_uid != newnfs_xdrneg1)
|
|
nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid);
|
|
if (sp->sa_gid != newnfs_xdrneg1)
|
|
nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid);
|
|
if (sp->sa_size != newnfs_xdrneg1)
|
|
nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size);
|
|
if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) {
|
|
#ifdef notyet
|
|
fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime);
|
|
#else
|
|
nvap->na_atime.tv_sec =
|
|
fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
|
|
nvap->na_atime.tv_nsec = 0;
|
|
#endif
|
|
}
|
|
if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1)
|
|
fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime);
|
|
break;
|
|
case ND_NFSV3:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl == newnfs_true) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
nvap->na_mode = nfstov_mode(*tl);
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl == newnfs_true) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
nvap->na_uid = fxdr_unsigned(uid_t, *tl);
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl == newnfs_true) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
nvap->na_gid = fxdr_unsigned(gid_t, *tl);
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl == newnfs_true) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
nvap->na_size = fxdr_hyper(tl);
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
switch (fxdr_unsigned(int, *tl)) {
|
|
case NFSV3SATTRTIME_TOCLIENT:
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
fxdr_nfsv3time(tl, &nvap->na_atime);
|
|
toclient = 1;
|
|
break;
|
|
case NFSV3SATTRTIME_TOSERVER:
|
|
vfs_timestamp(&nvap->na_atime);
|
|
nvap->na_vaflags |= VA_UTIMES_NULL;
|
|
break;
|
|
}
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
switch (fxdr_unsigned(int, *tl)) {
|
|
case NFSV3SATTRTIME_TOCLIENT:
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
fxdr_nfsv3time(tl, &nvap->na_mtime);
|
|
nvap->na_vaflags &= ~VA_UTIMES_NULL;
|
|
break;
|
|
case NFSV3SATTRTIME_TOSERVER:
|
|
vfs_timestamp(&nvap->na_mtime);
|
|
if (!toclient)
|
|
nvap->na_vaflags |= VA_UTIMES_NULL;
|
|
break;
|
|
}
|
|
break;
|
|
case ND_NFSV4:
|
|
error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p);
|
|
}
|
|
nfsmout:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Handle the setable attributes for V4.
|
|
* Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise.
|
|
*/
|
|
int
|
|
nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap,
|
|
nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
|
|
{
|
|
u_int32_t *tl;
|
|
int attrsum = 0;
|
|
int i, j;
|
|
int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0;
|
|
int toclient = 0;
|
|
u_char *cp, namestr[NFSV4_SMALLSTR + 1];
|
|
uid_t uid;
|
|
gid_t gid;
|
|
|
|
error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup);
|
|
if (error)
|
|
goto nfsmout;
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
attrsize = fxdr_unsigned(int, *tl);
|
|
|
|
/*
|
|
* Loop around getting the setable attributes. If an unsupported
|
|
* one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return.
|
|
*/
|
|
if (retnotsup) {
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
bitpos = NFSATTRBIT_MAX;
|
|
} else {
|
|
bitpos = 0;
|
|
}
|
|
for (; bitpos < NFSATTRBIT_MAX; bitpos++) {
|
|
if (attrsum > attrsize) {
|
|
error = NFSERR_BADXDR;
|
|
goto nfsmout;
|
|
}
|
|
if (NFSISSET_ATTRBIT(attrbitp, bitpos))
|
|
switch (bitpos) {
|
|
case NFSATTRBIT_SIZE:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
|
|
if (vp != NULL && vp->v_type != VREG) {
|
|
error = (vp->v_type == VDIR) ? NFSERR_ISDIR :
|
|
NFSERR_INVAL;
|
|
goto nfsmout;
|
|
}
|
|
nvap->na_size = fxdr_hyper(tl);
|
|
attrsum += NFSX_HYPER;
|
|
break;
|
|
case NFSATTRBIT_ACL:
|
|
error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize,
|
|
p);
|
|
if (error)
|
|
goto nfsmout;
|
|
if (aceerr && !nd->nd_repstat)
|
|
nd->nd_repstat = aceerr;
|
|
attrsum += aclsize;
|
|
break;
|
|
case NFSATTRBIT_ARCHIVE:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += NFSX_UNSIGNED;
|
|
break;
|
|
case NFSATTRBIT_HIDDEN:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += NFSX_UNSIGNED;
|
|
break;
|
|
case NFSATTRBIT_MIMETYPE:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *tl);
|
|
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
|
|
if (error)
|
|
goto nfsmout;
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i));
|
|
break;
|
|
case NFSATTRBIT_MODE:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
nvap->na_mode = nfstov_mode(*tl);
|
|
attrsum += NFSX_UNSIGNED;
|
|
break;
|
|
case NFSATTRBIT_OWNER:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
j = fxdr_unsigned(int, *tl);
|
|
if (j < 0) {
|
|
error = NFSERR_BADXDR;
|
|
goto nfsmout;
|
|
}
|
|
if (j > NFSV4_SMALLSTR)
|
|
cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
|
|
else
|
|
cp = namestr;
|
|
error = nfsrv_mtostr(nd, cp, j);
|
|
if (error) {
|
|
if (j > NFSV4_SMALLSTR)
|
|
free(cp, M_NFSSTRING);
|
|
goto nfsmout;
|
|
}
|
|
if (!nd->nd_repstat) {
|
|
nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid,
|
|
p);
|
|
if (!nd->nd_repstat)
|
|
nvap->na_uid = uid;
|
|
}
|
|
if (j > NFSV4_SMALLSTR)
|
|
free(cp, M_NFSSTRING);
|
|
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
|
|
break;
|
|
case NFSATTRBIT_OWNERGROUP:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
j = fxdr_unsigned(int, *tl);
|
|
if (j < 0) {
|
|
error = NFSERR_BADXDR;
|
|
goto nfsmout;
|
|
}
|
|
if (j > NFSV4_SMALLSTR)
|
|
cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
|
|
else
|
|
cp = namestr;
|
|
error = nfsrv_mtostr(nd, cp, j);
|
|
if (error) {
|
|
if (j > NFSV4_SMALLSTR)
|
|
free(cp, M_NFSSTRING);
|
|
goto nfsmout;
|
|
}
|
|
if (!nd->nd_repstat) {
|
|
nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid,
|
|
p);
|
|
if (!nd->nd_repstat)
|
|
nvap->na_gid = gid;
|
|
}
|
|
if (j > NFSV4_SMALLSTR)
|
|
free(cp, M_NFSSTRING);
|
|
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
|
|
break;
|
|
case NFSATTRBIT_SYSTEM:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += NFSX_UNSIGNED;
|
|
break;
|
|
case NFSATTRBIT_TIMEACCESSSET:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
attrsum += NFSX_UNSIGNED;
|
|
if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
|
|
fxdr_nfsv4time(tl, &nvap->na_atime);
|
|
toclient = 1;
|
|
attrsum += NFSX_V4TIME;
|
|
} else {
|
|
vfs_timestamp(&nvap->na_atime);
|
|
nvap->na_vaflags |= VA_UTIMES_NULL;
|
|
}
|
|
break;
|
|
case NFSATTRBIT_TIMEBACKUP:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += NFSX_V4TIME;
|
|
break;
|
|
case NFSATTRBIT_TIMECREATE:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
|
|
if (!nd->nd_repstat)
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
attrsum += NFSX_V4TIME;
|
|
break;
|
|
case NFSATTRBIT_TIMEMODIFYSET:
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
attrsum += NFSX_UNSIGNED;
|
|
if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
|
|
fxdr_nfsv4time(tl, &nvap->na_mtime);
|
|
nvap->na_vaflags &= ~VA_UTIMES_NULL;
|
|
attrsum += NFSX_V4TIME;
|
|
} else {
|
|
vfs_timestamp(&nvap->na_mtime);
|
|
if (!toclient)
|
|
nvap->na_vaflags |= VA_UTIMES_NULL;
|
|
}
|
|
break;
|
|
default:
|
|
nd->nd_repstat = NFSERR_ATTRNOTSUPP;
|
|
/*
|
|
* set bitpos so we drop out of the loop.
|
|
*/
|
|
bitpos = NFSATTRBIT_MAX;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* some clients pad the attrlist, so we need to skip over the
|
|
* padding.
|
|
*/
|
|
if (attrsum > attrsize) {
|
|
error = NFSERR_BADXDR;
|
|
} else {
|
|
attrsize = NFSM_RNDUP(attrsize);
|
|
if (attrsum < attrsize)
|
|
error = nfsm_advance(nd, attrsize - attrsum, -1);
|
|
}
|
|
nfsmout:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check/setup export credentials.
|
|
*/
|
|
int
|
|
nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp,
|
|
struct ucred *credanon)
|
|
{
|
|
int error = 0;
|
|
|
|
/*
|
|
* Check/setup credentials.
|
|
*/
|
|
if (nd->nd_flag & ND_GSS)
|
|
exp->nes_exflag &= ~MNT_EXPORTANON;
|
|
|
|
/*
|
|
* Check to see if the operation is allowed for this security flavor.
|
|
* RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to
|
|
* AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS.
|
|
* Also, allow Secinfo, so that it can acquire the correct flavor(s).
|
|
*/
|
|
if (nfsvno_testexp(nd, exp) &&
|
|
nd->nd_procnum != NFSV4OP_SECINFO &&
|
|
nd->nd_procnum != NFSPROC_FSINFO) {
|
|
if (nd->nd_flag & ND_NFSV4)
|
|
error = NFSERR_WRONGSEC;
|
|
else
|
|
error = (NFSERR_AUTHERR | AUTH_TOOWEAK);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Check to see if the file system is exported V4 only.
|
|
*/
|
|
if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) {
|
|
error = NFSERR_PROGNOTV4;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, map the user credentials.
|
|
* (Note that ND_AUTHNONE will only be set for an NFSv3
|
|
* Fsinfo RPC. If set for anything else, this code might need
|
|
* to change.)
|
|
*/
|
|
if (NFSVNO_EXPORTED(exp)) {
|
|
if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) ||
|
|
NFSVNO_EXPORTANON(exp) ||
|
|
(nd->nd_flag & ND_AUTHNONE) != 0) {
|
|
nd->nd_cred->cr_uid = credanon->cr_uid;
|
|
nd->nd_cred->cr_gid = credanon->cr_gid;
|
|
crsetgroups(nd->nd_cred, credanon->cr_ngroups,
|
|
credanon->cr_groups);
|
|
} else if ((nd->nd_flag & ND_GSS) == 0) {
|
|
/*
|
|
* If using AUTH_SYS, call nfsrv_getgrpscred() to see
|
|
* if there is a replacement credential with a group
|
|
* list set up by "nfsuserd -manage-gids".
|
|
* If there is no replacement, nfsrv_getgrpscred()
|
|
* simply returns its argument.
|
|
*/
|
|
nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred);
|
|
}
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE2(error, nd);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check exports.
|
|
*/
|
|
int
|
|
nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp,
|
|
struct ucred **credp)
|
|
{
|
|
int i, error, *secflavors;
|
|
|
|
error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
|
|
&exp->nes_numsecflavor, &secflavors);
|
|
if (error) {
|
|
if (nfs_rootfhset) {
|
|
exp->nes_exflag = 0;
|
|
exp->nes_numsecflavor = 0;
|
|
error = 0;
|
|
}
|
|
} else {
|
|
/* Copy the security flavors. */
|
|
for (i = 0; i < exp->nes_numsecflavor; i++)
|
|
exp->nes_secflavors[i] = secflavors[i];
|
|
}
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get a vnode for a file handle and export stuff.
|
|
*/
|
|
int
|
|
nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam,
|
|
int lktype, struct vnode **vpp, struct nfsexstuff *exp,
|
|
struct ucred **credp)
|
|
{
|
|
int i, error, *secflavors;
|
|
|
|
*credp = NULL;
|
|
exp->nes_numsecflavor = 0;
|
|
error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp);
|
|
if (error != 0)
|
|
/* Make sure the server replies ESTALE to the client. */
|
|
error = ESTALE;
|
|
if (nam && !error) {
|
|
error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
|
|
&exp->nes_numsecflavor, &secflavors);
|
|
if (error) {
|
|
if (nfs_rootfhset) {
|
|
exp->nes_exflag = 0;
|
|
exp->nes_numsecflavor = 0;
|
|
error = 0;
|
|
} else {
|
|
vput(*vpp);
|
|
}
|
|
} else {
|
|
/* Copy the security flavors. */
|
|
for (i = 0; i < exp->nes_numsecflavor; i++)
|
|
exp->nes_secflavors[i] = secflavors[i];
|
|
}
|
|
}
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfsd_fhtovp() - convert a fh to a vnode ptr
|
|
* - look up fsid in mount list (if not found ret error)
|
|
* - get vp and export rights by calling nfsvno_fhtovp()
|
|
* - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
|
|
* for AUTH_SYS
|
|
* - if mpp != NULL, return the mount point so that it can
|
|
* be used for vn_finished_write() by the caller
|
|
*/
|
|
void
|
|
nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype,
|
|
struct vnode **vpp, struct nfsexstuff *exp,
|
|
struct mount **mpp, int startwrite, struct thread *p)
|
|
{
|
|
struct mount *mp;
|
|
struct ucred *credanon;
|
|
fhandle_t *fhp;
|
|
|
|
fhp = (fhandle_t *)nfp->nfsrvfh_data;
|
|
/*
|
|
* Check for the special case of the nfsv4root_fh.
|
|
*/
|
|
mp = vfs_busyfs(&fhp->fh_fsid);
|
|
if (mpp != NULL)
|
|
*mpp = mp;
|
|
if (mp == NULL) {
|
|
*vpp = NULL;
|
|
nd->nd_repstat = ESTALE;
|
|
goto out;
|
|
}
|
|
|
|
if (startwrite) {
|
|
vn_start_write(NULL, mpp, V_WAIT);
|
|
if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp)))
|
|
lktype = LK_EXCLUSIVE;
|
|
}
|
|
nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp,
|
|
&credanon);
|
|
vfs_unbusy(mp);
|
|
|
|
/*
|
|
* For NFSv4 without a pseudo root fs, unexported file handles
|
|
* can be returned, so that Lookup works everywhere.
|
|
*/
|
|
if (!nd->nd_repstat && exp->nes_exflag == 0 &&
|
|
!(nd->nd_flag & ND_NFSV4)) {
|
|
vput(*vpp);
|
|
nd->nd_repstat = EACCES;
|
|
}
|
|
|
|
/*
|
|
* Personally, I've never seen any point in requiring a
|
|
* reserved port#, since only in the rare case where the
|
|
* clients are all boxes with secure system privileges,
|
|
* does it provide any enhanced security, but... some people
|
|
* believe it to be useful and keep putting this code back in.
|
|
* (There is also some "security checker" out there that
|
|
* complains if the nfs server doesn't enforce this.)
|
|
* However, note the following:
|
|
* RFC3530 (NFSv4) specifies that a reserved port# not be
|
|
* required.
|
|
* RFC2623 recommends that, if a reserved port# is checked for,
|
|
* that there be a way to turn that off--> ifdef'd.
|
|
*/
|
|
#ifdef NFS_REQRSVPORT
|
|
if (!nd->nd_repstat) {
|
|
struct sockaddr_in *saddr;
|
|
struct sockaddr_in6 *saddr6;
|
|
|
|
saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
|
|
saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
|
|
if (!(nd->nd_flag & ND_NFSV4) &&
|
|
((saddr->sin_family == AF_INET &&
|
|
ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
|
|
(saddr6->sin6_family == AF_INET6 &&
|
|
ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
|
|
vput(*vpp);
|
|
nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
|
|
}
|
|
}
|
|
#endif /* NFS_REQRSVPORT */
|
|
|
|
/*
|
|
* Check/setup credentials.
|
|
*/
|
|
if (!nd->nd_repstat) {
|
|
nd->nd_saveduid = nd->nd_cred->cr_uid;
|
|
nd->nd_repstat = nfsd_excred(nd, exp, credanon);
|
|
if (nd->nd_repstat)
|
|
vput(*vpp);
|
|
}
|
|
if (credanon != NULL)
|
|
crfree(credanon);
|
|
if (nd->nd_repstat) {
|
|
if (startwrite)
|
|
vn_finished_write(mp);
|
|
*vpp = NULL;
|
|
if (mpp != NULL)
|
|
*mpp = NULL;
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE2(0, nd);
|
|
}
|
|
|
|
/*
|
|
* glue for fp.
|
|
*/
|
|
static int
|
|
fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct file *fp;
|
|
int error = 0;
|
|
|
|
fdp = p->td_proc->p_fd;
|
|
if (fd < 0 || fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[fd].fde_file) == NULL) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
*fpp = fp;
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Called from nfssvc() to update the exports list. Just call
|
|
* vfs_export(). This has to be done, since the v4 root fake fs isn't
|
|
* in the mount list.
|
|
*/
|
|
int
|
|
nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p)
|
|
{
|
|
struct nfsex_args *nfsexargp = (struct nfsex_args *)argp;
|
|
int error = 0;
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
|
|
error = vfs_export(&nfsv4root_mnt, &nfsexargp->export);
|
|
if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0)
|
|
nfs_rootfhset = 0;
|
|
else if (error == 0) {
|
|
if (nfsexargp->fspec == NULL) {
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
/*
|
|
* If fspec != NULL, this is the v4root path.
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE,
|
|
nfsexargp->fspec, p);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
error = nfsvno_getfh(nd.ni_vp, &fh, p);
|
|
vrele(nd.ni_vp);
|
|
if (!error) {
|
|
nfs_rootfh.nfsrvfh_len = NFSX_MYFH;
|
|
NFSBCOPY((caddr_t)&fh,
|
|
nfs_rootfh.nfsrvfh_data,
|
|
sizeof (fhandle_t));
|
|
nfs_rootfhset = 1;
|
|
}
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This function needs to test to see if the system is near its limit
|
|
* for memory allocation via malloc() or mget() and return True iff
|
|
* either of these resources are near their limit.
|
|
* XXX (For now, this is just a stub.)
|
|
*/
|
|
int nfsrv_testmalloclimit = 0;
|
|
int
|
|
nfsrv_mallocmget_limit(void)
|
|
{
|
|
static int printmesg = 0;
|
|
static int testval = 1;
|
|
|
|
if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) {
|
|
if ((printmesg++ % 100) == 0)
|
|
printf("nfsd: malloc/mget near limit\n");
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* BSD specific initialization of a mount point.
|
|
*/
|
|
void
|
|
nfsd_mntinit(void)
|
|
{
|
|
static int inited = 0;
|
|
|
|
if (inited)
|
|
return;
|
|
inited = 1;
|
|
nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED);
|
|
TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist);
|
|
TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist);
|
|
nfsv4root_mnt.mnt_export = NULL;
|
|
TAILQ_INIT(&nfsv4root_opt);
|
|
TAILQ_INIT(&nfsv4root_newopt);
|
|
nfsv4root_mnt.mnt_opt = &nfsv4root_opt;
|
|
nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt;
|
|
nfsv4root_mnt.mnt_nvnodelistsize = 0;
|
|
nfsv4root_mnt.mnt_activevnodelistsize = 0;
|
|
}
|
|
|
|
/*
|
|
* Get a vnode for a file handle, without checking exports, etc.
|
|
*/
|
|
struct vnode *
|
|
nfsvno_getvp(fhandle_t *fhp)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
mp = vfs_busyfs(&fhp->fh_fsid);
|
|
if (mp == NULL)
|
|
return (NULL);
|
|
error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error)
|
|
return (NULL);
|
|
return (vp);
|
|
}
|
|
|
|
/*
|
|
* Do a local VOP_ADVLOCK().
|
|
*/
|
|
int
|
|
nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first,
|
|
u_int64_t end, struct thread *td)
|
|
{
|
|
int error = 0;
|
|
struct flock fl;
|
|
u_int64_t tlen;
|
|
|
|
if (nfsrv_dolocallocks == 0)
|
|
goto out;
|
|
ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked");
|
|
|
|
fl.l_whence = SEEK_SET;
|
|
fl.l_type = ftype;
|
|
fl.l_start = (off_t)first;
|
|
if (end == NFS64BITSSET) {
|
|
fl.l_len = 0;
|
|
} else {
|
|
tlen = end - first;
|
|
fl.l_len = (off_t)tlen;
|
|
}
|
|
/*
|
|
* For FreeBSD8, the l_pid and l_sysid must be set to the same
|
|
* values for all calls, so that all locks will be held by the
|
|
* nfsd server. (The nfsd server handles conflicts between the
|
|
* various clients.)
|
|
* Since an NFSv4 lockowner is a ClientID plus an array of up to 1024
|
|
* bytes, so it can't be put in l_sysid.
|
|
*/
|
|
if (nfsv4_sysid == 0)
|
|
nfsv4_sysid = nlm_acquire_next_sysid();
|
|
fl.l_pid = (pid_t)0;
|
|
fl.l_sysid = (int)nfsv4_sysid;
|
|
|
|
if (ftype == F_UNLCK)
|
|
error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl,
|
|
(F_POSIX | F_REMOTE));
|
|
else
|
|
error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl,
|
|
(F_POSIX | F_REMOTE));
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check the nfsv4 root exports.
|
|
*/
|
|
int
|
|
nfsvno_v4rootexport(struct nfsrv_descript *nd)
|
|
{
|
|
struct ucred *credanon;
|
|
int exflags, error = 0, numsecflavor, *secflavors, i;
|
|
|
|
error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags,
|
|
&credanon, &numsecflavor, &secflavors);
|
|
if (error) {
|
|
error = NFSERR_PROGUNAVAIL;
|
|
goto out;
|
|
}
|
|
if (credanon != NULL)
|
|
crfree(credanon);
|
|
for (i = 0; i < numsecflavor; i++) {
|
|
if (secflavors[i] == AUTH_SYS)
|
|
nd->nd_flag |= ND_EXAUTHSYS;
|
|
else if (secflavors[i] == RPCSEC_GSS_KRB5)
|
|
nd->nd_flag |= ND_EXGSS;
|
|
else if (secflavors[i] == RPCSEC_GSS_KRB5I)
|
|
nd->nd_flag |= ND_EXGSSINTEGRITY;
|
|
else if (secflavors[i] == RPCSEC_GSS_KRB5P)
|
|
nd->nd_flag |= ND_EXGSSPRIVACY;
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Nfs server pseudo system call for the nfsd's
|
|
*/
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
static int
|
|
nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap)
|
|
{
|
|
struct file *fp;
|
|
struct nfsd_addsock_args sockarg;
|
|
struct nfsd_nfsd_args nfsdarg;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
if (uap->flag & NFSSVC_NFSDADDSOCK) {
|
|
error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg));
|
|
if (error)
|
|
goto out;
|
|
/*
|
|
* Since we don't know what rights might be required,
|
|
* pretend that we need them all. It is better to be too
|
|
* careful than too reckless.
|
|
*/
|
|
error = fget(td, sockarg.sock,
|
|
cap_rights_init(&rights, CAP_SOCK_SERVER), &fp);
|
|
if (error != 0)
|
|
goto out;
|
|
if (fp->f_type != DTYPE_SOCKET) {
|
|
fdrop(fp, td);
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
error = nfsrvd_addsock(fp);
|
|
fdrop(fp, td);
|
|
} else if (uap->flag & NFSSVC_NFSDNFSD) {
|
|
if (uap->argp == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
error = copyin(uap->argp, (caddr_t)&nfsdarg,
|
|
sizeof (nfsdarg));
|
|
if (error)
|
|
goto out;
|
|
error = nfsrvd_nfsd(td, &nfsdarg);
|
|
} else {
|
|
error = nfssvc_srvcall(td, uap, td->td_ucred);
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
|
|
{
|
|
struct nfsex_args export;
|
|
struct file *fp = NULL;
|
|
int stablefd, len;
|
|
struct nfsd_clid adminrevoke;
|
|
struct nfsd_dumplist dumplist;
|
|
struct nfsd_dumpclients *dumpclients;
|
|
struct nfsd_dumplocklist dumplocklist;
|
|
struct nfsd_dumplocks *dumplocks;
|
|
struct nameidata nd;
|
|
vnode_t vp;
|
|
int error = EINVAL, igotlock;
|
|
struct proc *procp;
|
|
static int suspend_nfsd = 0;
|
|
|
|
if (uap->flag & NFSSVC_PUBLICFH) {
|
|
NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data,
|
|
sizeof (fhandle_t));
|
|
error = copyin(uap->argp,
|
|
&nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t));
|
|
if (!error)
|
|
nfs_pubfhset = 1;
|
|
} else if (uap->flag & NFSSVC_V4ROOTEXPORT) {
|
|
error = copyin(uap->argp,(caddr_t)&export,
|
|
sizeof (struct nfsex_args));
|
|
if (!error)
|
|
error = nfsrv_v4rootexport(&export, cred, p);
|
|
} else if (uap->flag & NFSSVC_NOPUBLICFH) {
|
|
nfs_pubfhset = 0;
|
|
error = 0;
|
|
} else if (uap->flag & NFSSVC_STABLERESTART) {
|
|
error = copyin(uap->argp, (caddr_t)&stablefd,
|
|
sizeof (int));
|
|
if (!error)
|
|
error = fp_getfvp(p, stablefd, &fp, &vp);
|
|
if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE))
|
|
error = EBADF;
|
|
if (!error && newnfs_numnfsd != 0)
|
|
error = EPERM;
|
|
if (!error) {
|
|
nfsrv_stablefirst.nsf_fp = fp;
|
|
nfsrv_setupstable(p);
|
|
}
|
|
} else if (uap->flag & NFSSVC_ADMINREVOKE) {
|
|
error = copyin(uap->argp, (caddr_t)&adminrevoke,
|
|
sizeof (struct nfsd_clid));
|
|
if (!error)
|
|
error = nfsrv_adminrevoke(&adminrevoke, p);
|
|
} else if (uap->flag & NFSSVC_DUMPCLIENTS) {
|
|
error = copyin(uap->argp, (caddr_t)&dumplist,
|
|
sizeof (struct nfsd_dumplist));
|
|
if (!error && (dumplist.ndl_size < 1 ||
|
|
dumplist.ndl_size > NFSRV_MAXDUMPLIST))
|
|
error = EPERM;
|
|
if (!error) {
|
|
len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size;
|
|
dumpclients = (struct nfsd_dumpclients *)malloc(len,
|
|
M_TEMP, M_WAITOK);
|
|
nfsrv_dumpclients(dumpclients, dumplist.ndl_size);
|
|
error = copyout(dumpclients,
|
|
CAST_USER_ADDR_T(dumplist.ndl_list), len);
|
|
free((caddr_t)dumpclients, M_TEMP);
|
|
}
|
|
} else if (uap->flag & NFSSVC_DUMPLOCKS) {
|
|
error = copyin(uap->argp, (caddr_t)&dumplocklist,
|
|
sizeof (struct nfsd_dumplocklist));
|
|
if (!error && (dumplocklist.ndllck_size < 1 ||
|
|
dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST))
|
|
error = EPERM;
|
|
if (!error)
|
|
error = nfsrv_lookupfilename(&nd,
|
|
dumplocklist.ndllck_fname, p);
|
|
if (!error) {
|
|
len = sizeof (struct nfsd_dumplocks) *
|
|
dumplocklist.ndllck_size;
|
|
dumplocks = (struct nfsd_dumplocks *)malloc(len,
|
|
M_TEMP, M_WAITOK);
|
|
nfsrv_dumplocks(nd.ni_vp, dumplocks,
|
|
dumplocklist.ndllck_size, p);
|
|
vput(nd.ni_vp);
|
|
error = copyout(dumplocks,
|
|
CAST_USER_ADDR_T(dumplocklist.ndllck_list), len);
|
|
free((caddr_t)dumplocks, M_TEMP);
|
|
}
|
|
} else if (uap->flag & NFSSVC_BACKUPSTABLE) {
|
|
procp = p->td_proc;
|
|
PROC_LOCK(procp);
|
|
nfsd_master_pid = procp->p_pid;
|
|
bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1);
|
|
nfsd_master_start = procp->p_stats->p_start;
|
|
nfsd_master_proc = procp;
|
|
PROC_UNLOCK(procp);
|
|
} else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
if (suspend_nfsd == 0) {
|
|
/* Lock out all nfsd threads */
|
|
do {
|
|
igotlock = nfsv4_lock(&nfsd_suspend_lock, 1,
|
|
NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
|
|
} while (igotlock == 0 && suspend_nfsd == 0);
|
|
suspend_nfsd = 1;
|
|
}
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = 0;
|
|
} else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) {
|
|
NFSLOCKV4ROOTMUTEX();
|
|
if (suspend_nfsd != 0) {
|
|
nfsv4_unlock(&nfsd_suspend_lock, 0);
|
|
suspend_nfsd = 0;
|
|
}
|
|
NFSUNLOCKV4ROOTMUTEX();
|
|
error = 0;
|
|
}
|
|
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check exports.
|
|
* Returns 0 if ok, 1 otherwise.
|
|
*/
|
|
int
|
|
nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* This seems odd, but allow the case where the security flavor
|
|
* list is empty. This happens when NFSv4 is traversing non-exported
|
|
* file systems. Exported file systems should always have a non-empty
|
|
* security flavor list.
|
|
*/
|
|
if (exp->nes_numsecflavor == 0)
|
|
return (0);
|
|
|
|
for (i = 0; i < exp->nes_numsecflavor; i++) {
|
|
/*
|
|
* The tests for privacy and integrity must be first,
|
|
* since ND_GSS is set for everything but AUTH_SYS.
|
|
*/
|
|
if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P &&
|
|
(nd->nd_flag & ND_GSSPRIVACY))
|
|
return (0);
|
|
if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I &&
|
|
(nd->nd_flag & ND_GSSINTEGRITY))
|
|
return (0);
|
|
if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 &&
|
|
(nd->nd_flag & ND_GSS))
|
|
return (0);
|
|
if (exp->nes_secflavors[i] == AUTH_SYS &&
|
|
(nd->nd_flag & ND_GSS) == 0)
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Calculate a hash value for the fid in a file handle.
|
|
*/
|
|
uint32_t
|
|
nfsrv_hashfh(fhandle_t *fhp)
|
|
{
|
|
uint32_t hashval;
|
|
|
|
hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0);
|
|
return (hashval);
|
|
}
|
|
|
|
/*
|
|
* Calculate a hash value for the sessionid.
|
|
*/
|
|
uint32_t
|
|
nfsrv_hashsessionid(uint8_t *sessionid)
|
|
{
|
|
uint32_t hashval;
|
|
|
|
hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0);
|
|
return (hashval);
|
|
}
|
|
|
|
/*
|
|
* Signal the userland master nfsd to backup the stable restart file.
|
|
*/
|
|
void
|
|
nfsrv_backupstable(void)
|
|
{
|
|
struct proc *procp;
|
|
|
|
if (nfsd_master_proc != NULL) {
|
|
procp = pfind(nfsd_master_pid);
|
|
/* Try to make sure it is the correct process. */
|
|
if (procp == nfsd_master_proc &&
|
|
procp->p_stats->p_start.tv_sec ==
|
|
nfsd_master_start.tv_sec &&
|
|
procp->p_stats->p_start.tv_usec ==
|
|
nfsd_master_start.tv_usec &&
|
|
strcmp(procp->p_comm, nfsd_master_comm) == 0)
|
|
kern_psignal(procp, SIGUSR2);
|
|
else
|
|
nfsd_master_proc = NULL;
|
|
|
|
if (procp != NULL)
|
|
PROC_UNLOCK(procp);
|
|
}
|
|
}
|
|
|
|
extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *);
|
|
|
|
/*
|
|
* Called once to initialize data structures...
|
|
*/
|
|
static int
|
|
nfsd_modevent(module_t mod, int type, void *data)
|
|
{
|
|
int error = 0, i;
|
|
static int loaded = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (loaded)
|
|
goto out;
|
|
newnfs_portinit();
|
|
for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) {
|
|
mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL,
|
|
MTX_DEF);
|
|
mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL,
|
|
MTX_DEF);
|
|
}
|
|
mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF);
|
|
mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF);
|
|
mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF);
|
|
lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0);
|
|
nfsrvd_initcache();
|
|
nfsd_init();
|
|
NFSD_LOCK();
|
|
nfsrvd_init(0);
|
|
NFSD_UNLOCK();
|
|
nfsd_mntinit();
|
|
#ifdef VV_DISABLEDELEG
|
|
vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation;
|
|
vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation;
|
|
#endif
|
|
nfsd_call_servertimer = nfsrv_servertimer;
|
|
nfsd_call_nfsd = nfssvc_nfsd;
|
|
loaded = 1;
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
if (newnfs_numnfsd != 0) {
|
|
error = EBUSY;
|
|
break;
|
|
}
|
|
|
|
#ifdef VV_DISABLEDELEG
|
|
vn_deleg_ops.vndeleg_recall = NULL;
|
|
vn_deleg_ops.vndeleg_disable = NULL;
|
|
#endif
|
|
nfsd_call_servertimer = NULL;
|
|
nfsd_call_nfsd = NULL;
|
|
|
|
/* Clean out all NFSv4 state. */
|
|
nfsrv_throwawayallstate(curthread);
|
|
|
|
/* Clean the NFS server reply cache */
|
|
nfsrvd_cleancache();
|
|
|
|
/* Free up the krpc server pool. */
|
|
if (nfsrvd_pool != NULL)
|
|
svcpool_destroy(nfsrvd_pool);
|
|
|
|
/* and get rid of the locks */
|
|
for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) {
|
|
mtx_destroy(&nfsrchash_table[i].mtx);
|
|
mtx_destroy(&nfsrcahash_table[i].mtx);
|
|
}
|
|
mtx_destroy(&nfsrc_udpmtx);
|
|
mtx_destroy(&nfs_v4root_mutex);
|
|
mtx_destroy(&nfsv4root_mnt.mnt_mtx);
|
|
for (i = 0; i < nfsrv_sessionhashsize; i++)
|
|
mtx_destroy(&nfssessionhash[i].mtx);
|
|
lockdestroy(&nfsv4root_mnt.mnt_explock);
|
|
free(nfsclienthash, M_NFSDCLIENT);
|
|
free(nfslockhash, M_NFSDLOCKFILE);
|
|
free(nfssessionhash, M_NFSDSESSION);
|
|
loaded = 0;
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
static moduledata_t nfsd_mod = {
|
|
"nfsd",
|
|
nfsd_modevent,
|
|
NULL,
|
|
};
|
|
DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY);
|
|
|
|
/* So that loader and kldload(2) can find us, wherever we are.. */
|
|
MODULE_VERSION(nfsd, 1);
|
|
MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1);
|
|
MODULE_DEPEND(nfsd, nfslock, 1, 1, 1);
|
|
MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1);
|
|
MODULE_DEPEND(nfsd, krpc, 1, 1, 1);
|
|
MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1);
|
|
|