63bde62e9a
case of a kerberized mount without a host based principal name. This will only work for mounts being done by a user other than root. Support for a host based principal name will not work until proposed changes to the rpcsec_gss part of the krpc are committed. It now builds for "options KGSSAPI". Approved by: kib (mentor)
944 lines
25 KiB
C
944 lines
25 KiB
C
/*-
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* Copyright (c) 1989, 1991, 1993, 1995
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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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/*
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* Socket operations for use by nfs
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*/
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#include "opt_inet6.h"
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#include "opt_kgssapi.h"
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#include "opt_nfs.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/vnode.h>
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#include <rpc/rpc.h>
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#include <kgssapi/krb5/kcrypto.h>
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#include <fs/nfs/nfsport.h>
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NFSSTATESPINLOCK;
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NFSREQSPINLOCK;
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extern struct nfsstats newnfsstats;
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extern struct nfsreqhead nfsd_reqq;
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extern int nfscl_ticks;
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extern void (*ncl_call_invalcaches)(struct vnode *);
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static int nfsrv_gsscallbackson = 0;
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static int nfs_bufpackets = 4;
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static int nfs_reconnects;
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static int nfs3_jukebox_delay = 10;
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static int nfs_skip_wcc_data_onerr = 1;
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static int nfs_keytab_enctype = ETYPE_DES_CBC_CRC;
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SYSCTL_DECL(_vfs_newnfs);
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SYSCTL_INT(_vfs_newnfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
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"Buffer reservation size 2 < x < 64");
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SYSCTL_INT(_vfs_newnfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
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"Number of times the nfs client has had to reconnect");
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SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
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"Number of seconds to delay a retry after receiving EJUKEBOX");
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SYSCTL_INT(_vfs_newnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
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"Disable weak cache consistency checking when server returns an error");
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SYSCTL_INT(_vfs_newnfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0,
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"Encryption type for the keytab entry used by nfs");
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static void nfs_down(struct nfsmount *, struct thread *, const char *,
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int, int);
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static void nfs_up(struct nfsmount *, struct thread *, const char *,
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int, int);
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static int nfs_msg(struct thread *, const char *, const char *, int);
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extern int nfsv2_procid[];
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struct nfs_cached_auth {
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int ca_refs; /* refcount, including 1 from the cache */
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uid_t ca_uid; /* uid that corresponds to this auth */
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AUTH *ca_auth; /* RPC auth handle */
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};
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/*
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* Initialize sockets and congestion for a new NFS connection.
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* We do not free the sockaddr if error.
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*/
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int
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newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
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struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
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{
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int rcvreserve, sndreserve;
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int pktscale;
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struct sockaddr *saddr;
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struct ucred *origcred;
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CLIENT *client;
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struct netconfig *nconf;
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struct socket *so;
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int one = 1, retries, error, printsbmax = 0;
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struct thread *td = curthread;
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/*
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* We need to establish the socket using the credentials of
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* the mountpoint. Some parts of this process (such as
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* sobind() and soconnect()) will use the curent thread's
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* credential instead of the socket credential. To work
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* around this, temporarily change the current thread's
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* credential to that of the mountpoint.
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*
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* XXX: It would be better to explicitly pass the correct
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* credential to sobind() and soconnect().
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*/
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origcred = td->td_ucred;
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/*
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* Use the credential in nr_cred, if not NULL.
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*/
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if (nrp->nr_cred != NULL)
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td->td_ucred = nrp->nr_cred;
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else
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td->td_ucred = cred;
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saddr = nrp->nr_nam;
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if (saddr->sa_family == AF_INET)
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if (nrp->nr_sotype == SOCK_DGRAM)
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nconf = getnetconfigent("udp");
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else
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nconf = getnetconfigent("tcp");
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else
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if (nrp->nr_sotype == SOCK_DGRAM)
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nconf = getnetconfigent("udp6");
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else
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nconf = getnetconfigent("tcp6");
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pktscale = nfs_bufpackets;
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if (pktscale < 2)
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pktscale = 2;
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if (pktscale > 64)
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pktscale = 64;
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/*
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* soreserve() can fail if sb_max is too small, so shrink pktscale
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* and try again if there is an error.
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* Print a log message suggesting increasing sb_max.
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* Creating a socket and doing this is necessary since, if the
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* reservation sizes are too large and will make soreserve() fail,
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* the connection will work until a large send is attempted and
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* then it will loop in the krpc code.
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*/
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so = NULL;
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saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
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error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
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nrp->nr_soproto, td->td_ucred, td);
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if (error) {
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td->td_ucred = origcred;
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return (error);
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}
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do {
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if (error != 0 && pktscale > 2) {
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pktscale--;
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if (printsbmax == 0) {
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printf("nfscl: consider increasing kern.ipc.maxsockbuf\n");
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printsbmax = 1;
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}
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}
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if (nrp->nr_sotype == SOCK_DGRAM) {
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if (nmp != NULL) {
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sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
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pktscale;
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rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
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pktscale;
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} else {
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sndreserve = rcvreserve = 1024 * pktscale;
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}
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} else {
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if (nrp->nr_sotype != SOCK_STREAM)
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panic("nfscon sotype");
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if (nmp != NULL) {
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sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
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sizeof (u_int32_t)) * pktscale;
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rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
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sizeof (u_int32_t)) * pktscale;
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} else {
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sndreserve = rcvreserve = 1024 * pktscale;
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}
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}
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error = soreserve(so, sndreserve, rcvreserve);
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} while (error != 0 && pktscale > 2);
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soclose(so);
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if (error) {
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td->td_ucred = origcred;
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return (error);
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}
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client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
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nrp->nr_vers, sndreserve, rcvreserve);
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CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
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if (nmp != NULL) {
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if ((nmp->nm_flag & NFSMNT_INT))
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CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
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if ((nmp->nm_flag & NFSMNT_RESVPORT))
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CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
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if (NFSHASSOFT(nmp))
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retries = nmp->nm_retry;
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else
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retries = INT_MAX;
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} else {
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/*
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* Three cases:
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* - Null RPC callback to client
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* - Non-Null RPC callback to client, wait a little longer
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* - upcalls to nfsuserd and gssd (clp == NULL)
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*/
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if (callback_retry_mult == 0) {
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retries = NFSV4_UPCALLRETRY;
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CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
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} else {
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retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
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}
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}
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CLNT_CONTROL(client, CLSET_RETRIES, &retries);
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mtx_lock(&nrp->nr_mtx);
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if (nrp->nr_client != NULL) {
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/*
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* Someone else already connected.
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*/
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CLNT_RELEASE(client);
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} else {
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nrp->nr_client = client;
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}
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/*
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* Protocols that do not require connections may be optionally left
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* unconnected for servers that reply from a port other than NFS_PORT.
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*/
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if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
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mtx_unlock(&nrp->nr_mtx);
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CLNT_CONTROL(client, CLSET_CONNECT, &one);
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} else {
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mtx_unlock(&nrp->nr_mtx);
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}
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/* Restore current thread's credentials. */
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td->td_ucred = origcred;
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return (0);
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}
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/*
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* NFS disconnect. Clean up and unlink.
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*/
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void
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newnfs_disconnect(struct nfssockreq *nrp)
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{
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CLIENT *client;
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mtx_lock(&nrp->nr_mtx);
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if (nrp->nr_client != NULL) {
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client = nrp->nr_client;
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nrp->nr_client = NULL;
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mtx_unlock(&nrp->nr_mtx);
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#ifdef KGSSAPI
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rpc_gss_secpurge(client);
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#endif
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CLNT_CLOSE(client);
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CLNT_RELEASE(client);
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} else {
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mtx_unlock(&nrp->nr_mtx);
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}
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}
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static AUTH *
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nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
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char *srv_principal, gss_OID mech_oid, struct ucred *cred)
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{
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#ifdef KGSSAPI
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rpc_gss_service_t svc;
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AUTH *auth;
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#ifdef notyet
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rpc_gss_options_req_t req_options;
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#endif
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#endif
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switch (secflavour) {
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#ifdef KGSSAPI
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case RPCSEC_GSS_KRB5:
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case RPCSEC_GSS_KRB5I:
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case RPCSEC_GSS_KRB5P:
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if (!mech_oid) {
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if (!rpc_gss_mech_to_oid("kerberosv5", &mech_oid))
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return (NULL);
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}
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if (secflavour == RPCSEC_GSS_KRB5)
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svc = rpc_gss_svc_none;
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else if (secflavour == RPCSEC_GSS_KRB5I)
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svc = rpc_gss_svc_integrity;
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else
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svc = rpc_gss_svc_privacy;
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#ifdef notyet
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req_options.req_flags = GSS_C_MUTUAL_FLAG;
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req_options.time_req = 0;
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req_options.my_cred = GSS_C_NO_CREDENTIAL;
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req_options.input_channel_bindings = NULL;
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req_options.enc_type = nfs_keytab_enctype;
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auth = rpc_gss_secfind(nrp->nr_client, cred,
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clnt_principal, srv_principal, mech_oid, svc,
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&req_options);
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#else
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/*
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* Until changes to the rpcsec_gss code are committed,
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* there is no support for host based initiator
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* principals. As such, that case cannot yet be handled.
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*/
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if (clnt_principal == NULL)
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auth = rpc_gss_secfind(nrp->nr_client, cred,
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srv_principal, mech_oid, svc);
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else
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auth = NULL;
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#endif
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if (auth != NULL)
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return (auth);
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/* fallthrough */
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#endif /* KGSSAPI */
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case AUTH_SYS:
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default:
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return (authunix_create(cred));
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|
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}
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}
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|
|
/*
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* Callback from the RPC code to generate up/down notifications.
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*/
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|
|
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struct nfs_feedback_arg {
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struct nfsmount *nf_mount;
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int nf_lastmsg; /* last tprintf */
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int nf_tprintfmsg;
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struct thread *nf_td;
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};
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|
|
static void
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nfs_feedback(int type, int proc, void *arg)
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|
{
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struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
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struct nfsmount *nmp = nf->nf_mount;
|
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struct timeval now;
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|
|
|
getmicrouptime(&now);
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|
|
|
switch (type) {
|
|
case FEEDBACK_REXMIT2:
|
|
case FEEDBACK_RECONNECT:
|
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if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) {
|
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nfs_down(nmp, nf->nf_td,
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"not responding", 0, NFSSTA_TIMEO);
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|
nf->nf_tprintfmsg = TRUE;
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nf->nf_lastmsg = now.tv_sec;
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}
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break;
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|
|
|
case FEEDBACK_OK:
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nfs_up(nf->nf_mount, nf->nf_td,
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"is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
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break;
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}
|
|
}
|
|
|
|
/*
|
|
* newnfs_request - goes something like this
|
|
* - does the rpc by calling the krpc layer
|
|
* - break down rpc header and return with nfs reply
|
|
* nb: always frees up nd_mreq mbuf list
|
|
*/
|
|
int
|
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newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
|
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struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
|
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struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
|
|
u_char *retsum, int toplevel, u_int64_t *xidp)
|
|
{
|
|
u_int32_t *tl;
|
|
time_t waituntil;
|
|
int i, j, set_uid = 0;
|
|
int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
|
|
u_int16_t procnum;
|
|
u_int trylater_delay = 1;
|
|
struct nfs_feedback_arg nf;
|
|
struct timeval timo, now;
|
|
AUTH *auth;
|
|
struct rpc_callextra ext;
|
|
enum clnt_stat stat;
|
|
struct nfsreq *rep = NULL;
|
|
char *srv_principal = NULL;
|
|
uid_t saved_uid = (uid_t)-1;
|
|
|
|
if (xidp != NULL)
|
|
*xidp = 0;
|
|
/* Reject requests while attempting a forced unmount. */
|
|
if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
|
|
m_freem(nd->nd_mreq);
|
|
return (ESTALE);
|
|
}
|
|
|
|
/*
|
|
* XXX if not already connected call nfs_connect now. Longer
|
|
* term, change nfs_mount to call nfs_connect unconditionally
|
|
* and let clnt_reconnect_create handle reconnects.
|
|
*/
|
|
if (nrp->nr_client == NULL)
|
|
newnfs_connect(nmp, nrp, cred, td, 0);
|
|
|
|
/*
|
|
* For a client side mount, nmp is != NULL and clp == NULL. For
|
|
* server calls (callbacks or upcalls), nmp == NULL.
|
|
*/
|
|
if (clp != NULL) {
|
|
NFSLOCKSTATE();
|
|
if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
|
|
secflavour = RPCSEC_GSS_KRB5;
|
|
if (nd->nd_procnum != NFSPROC_NULL) {
|
|
if (clp->lc_flags & LCL_GSSINTEGRITY)
|
|
secflavour = RPCSEC_GSS_KRB5I;
|
|
else if (clp->lc_flags & LCL_GSSPRIVACY)
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|
secflavour = RPCSEC_GSS_KRB5P;
|
|
}
|
|
}
|
|
NFSUNLOCKSTATE();
|
|
} else if (nmp != NULL && NFSHASKERB(nmp) &&
|
|
nd->nd_procnum != NFSPROC_NULL) {
|
|
if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
|
|
nd->nd_flag |= ND_USEGSSNAME;
|
|
if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
|
|
/*
|
|
* If there is a client side host based credential,
|
|
* use that, otherwise use the system uid, if set.
|
|
*/
|
|
if (nmp->nm_krbnamelen > 0) {
|
|
usegssname = 1;
|
|
} else if (nmp->nm_uid != (uid_t)-1) {
|
|
saved_uid = cred->cr_uid;
|
|
cred->cr_uid = nmp->nm_uid;
|
|
set_uid = 1;
|
|
}
|
|
} else if (nmp->nm_krbnamelen == 0 &&
|
|
nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
|
|
/*
|
|
* If there is no host based principal name and
|
|
* the system uid is set and this is root, use the
|
|
* system uid, since root won't have user
|
|
* credentials in a credentials cache file.
|
|
*/
|
|
saved_uid = cred->cr_uid;
|
|
cred->cr_uid = nmp->nm_uid;
|
|
set_uid = 1;
|
|
}
|
|
if (NFSHASINTEGRITY(nmp))
|
|
secflavour = RPCSEC_GSS_KRB5I;
|
|
else if (NFSHASPRIVACY(nmp))
|
|
secflavour = RPCSEC_GSS_KRB5P;
|
|
else
|
|
secflavour = RPCSEC_GSS_KRB5;
|
|
srv_principal = NFSMNT_SRVKRBNAME(nmp);
|
|
}
|
|
|
|
if (nmp != NULL) {
|
|
bzero(&nf, sizeof(struct nfs_feedback_arg));
|
|
nf.nf_mount = nmp;
|
|
nf.nf_td = td;
|
|
getmicrouptime(&now);
|
|
nf.nf_lastmsg = now.tv_sec -
|
|
((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
|
|
}
|
|
|
|
if (nd->nd_procnum == NFSPROC_NULL)
|
|
auth = authnone_create();
|
|
else if (usegssname)
|
|
auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname,
|
|
srv_principal, NULL, cred);
|
|
else
|
|
auth = nfs_getauth(nrp, secflavour, NULL,
|
|
srv_principal, NULL, cred);
|
|
if (set_uid)
|
|
cred->cr_uid = saved_uid;
|
|
if (auth == NULL) {
|
|
m_freem(nd->nd_mreq);
|
|
return (EACCES);
|
|
}
|
|
bzero(&ext, sizeof(ext));
|
|
ext.rc_auth = auth;
|
|
if (nmp != NULL) {
|
|
ext.rc_feedback = nfs_feedback;
|
|
ext.rc_feedback_arg = &nf;
|
|
}
|
|
|
|
procnum = nd->nd_procnum;
|
|
if ((nd->nd_flag & ND_NFSV4) &&
|
|
nd->nd_procnum != NFSPROC_NULL &&
|
|
nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
|
|
procnum = NFSV4PROC_COMPOUND;
|
|
|
|
if (nmp != NULL) {
|
|
NFSINCRGLOBAL(newnfsstats.rpcrequests);
|
|
/*
|
|
* Now only used for the R_DONTRECOVER case, but until that is
|
|
* supported within the krpc code, I need to keep a queue of
|
|
* outstanding RPCs for nfsv4 client requests.
|
|
*/
|
|
if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
|
|
MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
|
|
M_NFSDREQ, M_WAITOK);
|
|
}
|
|
trycnt = 0;
|
|
tryagain:
|
|
if (nmp == NULL) {
|
|
timo.tv_usec = 0;
|
|
if (clp == NULL)
|
|
timo.tv_sec = NFSV4_UPCALLTIMEO;
|
|
else
|
|
timo.tv_sec = NFSV4_CALLBACKTIMEO;
|
|
} else {
|
|
if (nrp->nr_sotype != SOCK_DGRAM) {
|
|
timo.tv_usec = 0;
|
|
if ((nmp->nm_flag & NFSMNT_NFSV4))
|
|
timo.tv_sec = INT_MAX;
|
|
else
|
|
timo.tv_sec = NFS_TCPTIMEO;
|
|
} else {
|
|
timo.tv_sec = nmp->nm_timeo / NFS_HZ;
|
|
timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ;
|
|
}
|
|
|
|
if (rep != NULL) {
|
|
rep->r_flags = 0;
|
|
rep->r_nmp = nmp;
|
|
/*
|
|
* Chain request into list of outstanding requests.
|
|
*/
|
|
NFSLOCKREQ();
|
|
TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
|
|
NFSUNLOCKREQ();
|
|
}
|
|
}
|
|
|
|
nd->nd_mrep = NULL;
|
|
stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq,
|
|
&nd->nd_mrep, timo);
|
|
|
|
if (rep != NULL) {
|
|
/*
|
|
* RPC done, unlink the request.
|
|
*/
|
|
NFSLOCKREQ();
|
|
TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
|
|
NFSUNLOCKREQ();
|
|
}
|
|
|
|
/*
|
|
* If there was a successful reply and a tprintf msg.
|
|
* tprintf a response.
|
|
*/
|
|
if (stat == RPC_SUCCESS) {
|
|
error = 0;
|
|
} else if (stat == RPC_TIMEDOUT) {
|
|
error = ETIMEDOUT;
|
|
} else if (stat == RPC_VERSMISMATCH) {
|
|
error = EOPNOTSUPP;
|
|
} else if (stat == RPC_PROGVERSMISMATCH) {
|
|
error = EPROTONOSUPPORT;
|
|
} else {
|
|
error = EACCES;
|
|
}
|
|
if (error) {
|
|
m_freem(nd->nd_mreq);
|
|
AUTH_DESTROY(auth);
|
|
if (rep != NULL)
|
|
FREE((caddr_t)rep, M_NFSDREQ);
|
|
return (error);
|
|
}
|
|
|
|
KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
|
|
|
|
nd->nd_md = nd->nd_mrep;
|
|
nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
|
|
nd->nd_repstat = 0;
|
|
if (nd->nd_procnum != NFSPROC_NULL) {
|
|
/*
|
|
* and now the actual NFS xdr.
|
|
*/
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
|
|
if (nd->nd_repstat != 0) {
|
|
if ((nd->nd_repstat == NFSERR_DELAY &&
|
|
(nd->nd_flag & ND_NFSV4) &&
|
|
nd->nd_procnum != NFSPROC_SETATTR &&
|
|
nd->nd_procnum != NFSPROC_READ &&
|
|
nd->nd_procnum != NFSPROC_WRITE &&
|
|
nd->nd_procnum != NFSPROC_OPEN &&
|
|
nd->nd_procnum != NFSPROC_CREATE &&
|
|
nd->nd_procnum != NFSPROC_OPENCONFIRM &&
|
|
nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
|
|
nd->nd_procnum != NFSPROC_CLOSE &&
|
|
nd->nd_procnum != NFSPROC_LOCK &&
|
|
nd->nd_procnum != NFSPROC_LOCKU) ||
|
|
(nd->nd_repstat == NFSERR_DELAY &&
|
|
(nd->nd_flag & ND_NFSV4) == 0) ||
|
|
nd->nd_repstat == NFSERR_RESOURCE) {
|
|
if (trylater_delay > NFS_TRYLATERDEL)
|
|
trylater_delay = NFS_TRYLATERDEL;
|
|
waituntil = NFSD_MONOSEC + trylater_delay;
|
|
while (NFSD_MONOSEC < waituntil)
|
|
(void) nfs_catnap(PZERO, "nfstry");
|
|
trylater_delay *= 2;
|
|
goto tryagain;
|
|
}
|
|
|
|
/*
|
|
* If the File Handle was stale, invalidate the
|
|
* lookup cache, just in case.
|
|
* (vp != NULL implies a client side call)
|
|
*/
|
|
if (nd->nd_repstat == ESTALE && vp != NULL) {
|
|
cache_purge(vp);
|
|
if (ncl_call_invalcaches != NULL)
|
|
(*ncl_call_invalcaches)(vp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get rid of the tag, return count, and PUTFH result for V4.
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV4) {
|
|
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;
|
|
NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *++tl);
|
|
|
|
/*
|
|
* If the first op's status is non-zero, mark that
|
|
* there is no more data to process.
|
|
*/
|
|
if (*++tl)
|
|
nd->nd_flag |= ND_NOMOREDATA;
|
|
|
|
/*
|
|
* If the first op is Putfh, throw its results away
|
|
* and toss the op# and status for the first op.
|
|
*/
|
|
if (nmp != NULL && i == NFSV4OP_PUTFH && *tl == 0) {
|
|
NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *tl++);
|
|
j = fxdr_unsigned(int, *tl);
|
|
/*
|
|
* All Compounds that do an Op that must
|
|
* be in sequence consist of NFSV4OP_PUTFH
|
|
* followed by one of these. As such, we
|
|
* can determine if the seqid# should be
|
|
* incremented, here.
|
|
*/
|
|
if ((i == NFSV4OP_OPEN ||
|
|
i == NFSV4OP_OPENCONFIRM ||
|
|
i == NFSV4OP_OPENDOWNGRADE ||
|
|
i == NFSV4OP_CLOSE ||
|
|
i == NFSV4OP_LOCK ||
|
|
i == NFSV4OP_LOCKU) &&
|
|
(j == 0 ||
|
|
(j != NFSERR_STALECLIENTID &&
|
|
j != NFSERR_STALESTATEID &&
|
|
j != NFSERR_BADSTATEID &&
|
|
j != NFSERR_BADSEQID &&
|
|
j != NFSERR_BADXDR &&
|
|
j != NFSERR_RESOURCE &&
|
|
j != NFSERR_NOFILEHANDLE)))
|
|
nd->nd_flag |= ND_INCRSEQID;
|
|
/*
|
|
* If the first op's status is non-zero, mark
|
|
* that there is no more data to process.
|
|
*/
|
|
if (j)
|
|
nd->nd_flag |= ND_NOMOREDATA;
|
|
}
|
|
|
|
/*
|
|
* If R_DONTRECOVER is set, replace the stale error
|
|
* reply, so that recovery isn't initiated.
|
|
*/
|
|
if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
|
|
nd->nd_repstat == NFSERR_STALESTATEID) &&
|
|
rep != NULL && (rep->r_flags & R_DONTRECOVER))
|
|
nd->nd_repstat = NFSERR_STALEDONTRECOVER;
|
|
}
|
|
}
|
|
|
|
m_freem(nd->nd_mreq);
|
|
AUTH_DESTROY(auth);
|
|
if (rep != NULL)
|
|
FREE((caddr_t)rep, M_NFSDREQ);
|
|
return (0);
|
|
nfsmout:
|
|
mbuf_freem(nd->nd_mrep);
|
|
mbuf_freem(nd->nd_mreq);
|
|
AUTH_DESTROY(auth);
|
|
if (rep != NULL)
|
|
FREE((caddr_t)rep, M_NFSDREQ);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
|
|
* wait for all requests to complete. This is used by forced unmounts
|
|
* to terminate any outstanding RPCs.
|
|
*/
|
|
int
|
|
newnfs_nmcancelreqs(struct nfsmount *nmp)
|
|
{
|
|
|
|
if (nmp->nm_sockreq.nr_client != NULL)
|
|
CLNT_CLOSE(nmp->nm_sockreq.nr_client);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Any signal that can interrupt an NFS operation in an intr mount
|
|
* should be added to this set. SIGSTOP and SIGKILL cannot be masked.
|
|
*/
|
|
int newnfs_sig_set[] = {
|
|
SIGINT,
|
|
SIGTERM,
|
|
SIGHUP,
|
|
SIGKILL,
|
|
SIGSTOP,
|
|
SIGQUIT
|
|
};
|
|
|
|
/*
|
|
* Check to see if one of the signals in our subset is pending on
|
|
* the process (in an intr mount).
|
|
*/
|
|
static int
|
|
nfs_sig_pending(sigset_t set)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
|
|
if (SIGISMEMBER(set, newnfs_sig_set[i]))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The set/restore sigmask functions are used to (temporarily) overwrite
|
|
* the process p_sigmask during an RPC call (for example). These are also
|
|
* used in other places in the NFS client that might tsleep().
|
|
*/
|
|
void
|
|
newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
|
|
{
|
|
sigset_t newset;
|
|
int i;
|
|
struct proc *p;
|
|
|
|
SIGFILLSET(newset);
|
|
if (td == NULL)
|
|
td = curthread; /* XXX */
|
|
p = td->td_proc;
|
|
/* Remove the NFS set of signals from newset */
|
|
PROC_LOCK(p);
|
|
mtx_lock(&p->p_sigacts->ps_mtx);
|
|
for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
|
|
/*
|
|
* But make sure we leave the ones already masked
|
|
* by the process, ie. remove the signal from the
|
|
* temporary signalmask only if it wasn't already
|
|
* in p_sigmask.
|
|
*/
|
|
if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
|
|
!SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
|
|
SIGDELSET(newset, newnfs_sig_set[i]);
|
|
}
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
PROC_UNLOCK(p);
|
|
kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0);
|
|
}
|
|
|
|
void
|
|
newnfs_restore_sigmask(struct thread *td, sigset_t *set)
|
|
{
|
|
if (td == NULL)
|
|
td = curthread; /* XXX */
|
|
kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
|
|
}
|
|
|
|
/*
|
|
* NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
|
|
* old one after msleep() returns.
|
|
*/
|
|
int
|
|
newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
|
|
{
|
|
sigset_t oldset;
|
|
int error;
|
|
struct proc *p;
|
|
|
|
if ((priority & PCATCH) == 0)
|
|
return msleep(ident, mtx, priority, wmesg, timo);
|
|
if (td == NULL)
|
|
td = curthread; /* XXX */
|
|
newnfs_set_sigmask(td, &oldset);
|
|
error = msleep(ident, mtx, priority, wmesg, timo);
|
|
newnfs_restore_sigmask(td, &oldset);
|
|
p = td->td_proc;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Test for a termination condition pending on the process.
|
|
* This is used for NFSMNT_INT mounts.
|
|
*/
|
|
int
|
|
newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
|
|
{
|
|
struct proc *p;
|
|
sigset_t tmpset;
|
|
|
|
/* Terminate all requests while attempting a forced unmount. */
|
|
if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
|
|
return (EIO);
|
|
if (!(nmp->nm_flag & NFSMNT_INT))
|
|
return (0);
|
|
if (td == NULL)
|
|
return (0);
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
tmpset = p->p_siglist;
|
|
SIGSETOR(tmpset, td->td_siglist);
|
|
SIGSETNAND(tmpset, td->td_sigmask);
|
|
mtx_lock(&p->p_sigacts->ps_mtx);
|
|
SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
|
|
&& nfs_sig_pending(tmpset)) {
|
|
PROC_UNLOCK(p);
|
|
return (EINTR);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
nfs_msg(struct thread *td, const char *server, const char *msg, int error)
|
|
{
|
|
struct proc *p;
|
|
|
|
p = td ? td->td_proc : NULL;
|
|
if (error) {
|
|
tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
|
|
server, msg, error);
|
|
} else {
|
|
tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
|
|
int error, int flags)
|
|
{
|
|
if (nmp == NULL)
|
|
return;
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
|
|
nmp->nm_state |= NFSSTA_TIMEO;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
|
|
VQ_NOTRESP, 0);
|
|
} else
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
|
|
nmp->nm_state |= NFSSTA_LOCKTIMEO;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
|
|
VQ_NOTRESPLOCK, 0);
|
|
} else
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
|
|
}
|
|
|
|
static void
|
|
nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
|
|
int flags, int tprintfmsg)
|
|
{
|
|
if (nmp == NULL)
|
|
return;
|
|
if (tprintfmsg) {
|
|
nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
|
|
}
|
|
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
|
|
nmp->nm_state &= ~NFSSTA_TIMEO;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
|
|
VQ_NOTRESP, 1);
|
|
} else
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
|
|
nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
|
|
VQ_NOTRESPLOCK, 1);
|
|
} else
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
|