the NFS subsystems use five of the rpcsec_gss/kgssapi entry points, but since it was not obvious which others might be useful, all nineteen were included. Basically the nineteen entry points are set in a structure called rpc_gss_entries and inline functions defined in sys/rpc/rpcsec_gss.h check for the entry points being non-NULL and then call them. A default value is returned otherwise. Requested by rwatson. Reviewed by: jhb MFC after: 2 weeks
827 lines
21 KiB
C
827 lines
21 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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* @(#)nfs_socket.c 8.5 (Berkeley) 3/30/95
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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_kdtrace.h"
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#include "opt_kgssapi.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 <nfs/nfsproto.h>
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#include <nfsclient/nfs.h>
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#include <nfs/xdr_subs.h>
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#include <nfsclient/nfsm_subs.h>
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#include <nfsclient/nfsmount.h>
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#include <nfsclient/nfsnode.h>
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#ifdef KDTRACE_HOOKS
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#include <sys/dtrace_bsd.h>
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dtrace_nfsclient_nfs23_start_probe_func_t
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dtrace_nfsclient_nfs23_start_probe;
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dtrace_nfsclient_nfs23_done_probe_func_t
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dtrace_nfsclient_nfs23_done_probe;
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/*
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* Registered probes by RPC type.
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*/
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uint32_t nfsclient_nfs2_start_probes[NFS_NPROCS];
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uint32_t nfsclient_nfs2_done_probes[NFS_NPROCS];
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uint32_t nfsclient_nfs3_start_probes[NFS_NPROCS];
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uint32_t nfsclient_nfs3_done_probes[NFS_NPROCS];
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#endif
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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 fake_wchan;
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SYSCTL_DECL(_vfs_oldnfs);
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SYSCTL_INT(_vfs_oldnfs, 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_oldnfs, 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_oldnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW,
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&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_oldnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW,
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&nfs_skip_wcc_data_onerr, 0,
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"Disable weak cache consistency checking when server returns an error");
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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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* RTT estimator
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*/
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static enum nfs_rto_timer_t nfs_proct[NFS_NPROCS] = {
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NFS_DEFAULT_TIMER, /* NULL */
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NFS_GETATTR_TIMER, /* GETATTR */
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NFS_DEFAULT_TIMER, /* SETATTR */
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NFS_LOOKUP_TIMER, /* LOOKUP */
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NFS_GETATTR_TIMER, /* ACCESS */
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NFS_READ_TIMER, /* READLINK */
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NFS_READ_TIMER, /* READ */
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NFS_WRITE_TIMER, /* WRITE */
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NFS_DEFAULT_TIMER, /* CREATE */
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NFS_DEFAULT_TIMER, /* MKDIR */
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NFS_DEFAULT_TIMER, /* SYMLINK */
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NFS_DEFAULT_TIMER, /* MKNOD */
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NFS_DEFAULT_TIMER, /* REMOVE */
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NFS_DEFAULT_TIMER, /* RMDIR */
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NFS_DEFAULT_TIMER, /* RENAME */
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NFS_DEFAULT_TIMER, /* LINK */
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NFS_READ_TIMER, /* READDIR */
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NFS_READ_TIMER, /* READDIRPLUS */
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NFS_DEFAULT_TIMER, /* FSSTAT */
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NFS_DEFAULT_TIMER, /* FSINFO */
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NFS_DEFAULT_TIMER, /* PATHCONF */
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NFS_DEFAULT_TIMER, /* COMMIT */
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NFS_DEFAULT_TIMER, /* NOOP */
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};
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/*
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* Choose the correct RTT timer for this NFS procedure.
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*/
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static inline enum nfs_rto_timer_t
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nfs_rto_timer(u_int32_t procnum)
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{
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return (nfs_proct[procnum]);
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}
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/*
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* Initialize the RTT estimator state for a new mount point.
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*/
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static void
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nfs_init_rtt(struct nfsmount *nmp)
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{
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int i;
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for (i = 0; i < NFS_MAX_TIMER; i++) {
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nmp->nm_timers[i].rt_srtt = hz;
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nmp->nm_timers[i].rt_deviate = 0;
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nmp->nm_timers[i].rt_rtxcur = hz;
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}
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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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nfs_connect(struct nfsmount *nmp)
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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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struct thread *td = curthread;
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CLIENT *client;
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struct netconfig *nconf;
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rpcvers_t vers;
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int one = 1, retries;
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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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td->td_ucred = nmp->nm_mountp->mnt_cred;
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saddr = nmp->nm_nam;
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vers = NFS_VER2;
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if (nmp->nm_flag & NFSMNT_NFSV3)
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vers = NFS_VER3;
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else if (nmp->nm_flag & NFSMNT_NFSV4)
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vers = NFS_VER4;
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if (saddr->sa_family == AF_INET)
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if (nmp->nm_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 (nmp->nm_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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/*
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* Get buffer reservation size from sysctl, but impose reasonable
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* limits.
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*/
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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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mtx_lock(&nmp->nm_mtx);
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if (nmp->nm_sotype == SOCK_DGRAM) {
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sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
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rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
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NFS_MAXPKTHDR) * pktscale;
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} else if (nmp->nm_sotype == SOCK_SEQPACKET) {
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sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
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rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
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NFS_MAXPKTHDR) * pktscale;
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} else {
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if (nmp->nm_sotype != SOCK_STREAM)
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panic("nfscon sotype");
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sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR +
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sizeof (u_int32_t)) * pktscale;
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rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR +
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sizeof (u_int32_t)) * pktscale;
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}
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mtx_unlock(&nmp->nm_mtx);
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client = clnt_reconnect_create(nconf, saddr, NFS_PROG, vers,
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sndreserve, rcvreserve);
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CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq");
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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 (nmp->nm_flag & NFSMNT_SOFT)
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retries = nmp->nm_retry;
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else
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retries = INT_MAX;
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CLNT_CONTROL(client, CLSET_RETRIES, &retries);
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mtx_lock(&nmp->nm_mtx);
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if (nmp->nm_client) {
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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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nmp->nm_client = client;
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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->nm_flag & NFSMNT_NOCONN)) {
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mtx_unlock(&nmp->nm_mtx);
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CLNT_CONTROL(client, CLSET_CONNECT, &one);
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} else
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mtx_unlock(&nmp->nm_mtx);
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/* Restore current thread's credentials. */
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td->td_ucred = origcred;
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mtx_lock(&nmp->nm_mtx);
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/* Initialize other non-zero congestion variables. */
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nfs_init_rtt(nmp);
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mtx_unlock(&nmp->nm_mtx);
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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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nfs_disconnect(struct nfsmount *nmp)
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{
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CLIENT *client;
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mtx_lock(&nmp->nm_mtx);
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if (nmp->nm_client) {
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client = nmp->nm_client;
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nmp->nm_client = NULL;
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mtx_unlock(&nmp->nm_mtx);
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rpc_gss_secpurge_call(client);
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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(&nmp->nm_mtx);
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}
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void
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nfs_safedisconnect(struct nfsmount *nmp)
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{
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nfs_disconnect(nmp);
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}
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static AUTH *
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nfs_getauth(struct nfsmount *nmp, struct ucred *cred)
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{
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rpc_gss_service_t svc;
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AUTH *auth;
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switch (nmp->nm_secflavor) {
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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 (!nmp->nm_mech_oid)
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if (!rpc_gss_mech_to_oid_call("kerberosv5",
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&nmp->nm_mech_oid))
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return (NULL);
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if (nmp->nm_secflavor == RPCSEC_GSS_KRB5)
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svc = rpc_gss_svc_none;
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else if (nmp->nm_secflavor == 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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auth = rpc_gss_secfind_call(nmp->nm_client, cred,
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nmp->nm_principal, nmp->nm_mech_oid, svc);
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if (auth)
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return (auth);
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/* fallthrough */
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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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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) {
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case FEEDBACK_REXMIT2:
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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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}
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}
|
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|
|
/*
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* nfs_request - goes something like this
|
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* - fill in request struct
|
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* - links it into list
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* - calls nfs_send() for first transmit
|
|
* - calls nfs_receive() to get reply
|
|
* - break down rpc header and return with nfs reply pointed to
|
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* by mrep or error
|
|
* nb: always frees up mreq mbuf list
|
|
*/
|
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int
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nfs_request(struct vnode *vp, struct mbuf *mreq, int procnum,
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struct thread *td, struct ucred *cred, struct mbuf **mrp,
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struct mbuf **mdp, caddr_t *dposp)
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|
{
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|
struct mbuf *mrep;
|
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u_int32_t *tl;
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struct nfsmount *nmp;
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struct mbuf *md;
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|
time_t waituntil;
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|
caddr_t dpos;
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int error = 0;
|
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struct timeval now;
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AUTH *auth = NULL;
|
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enum nfs_rto_timer_t timer;
|
|
struct nfs_feedback_arg nf;
|
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struct rpc_callextra ext;
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enum clnt_stat stat;
|
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struct timeval timo;
|
|
|
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/* Reject requests while attempting a forced unmount. */
|
|
if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF) {
|
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m_freem(mreq);
|
|
return (ESTALE);
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}
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nmp = VFSTONFS(vp->v_mount);
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bzero(&nf, sizeof(struct nfs_feedback_arg));
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nf.nf_mount = nmp;
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nf.nf_td = td;
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getmicrouptime(&now);
|
|
nf.nf_lastmsg = now.tv_sec -
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((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
|
|
|
|
/*
|
|
* 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 (!nmp->nm_client)
|
|
nfs_connect(nmp);
|
|
|
|
auth = nfs_getauth(nmp, cred);
|
|
if (!auth) {
|
|
m_freem(mreq);
|
|
return (EACCES);
|
|
}
|
|
bzero(&ext, sizeof(ext));
|
|
ext.rc_auth = auth;
|
|
|
|
ext.rc_feedback = nfs_feedback;
|
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ext.rc_feedback_arg = &nf;
|
|
|
|
/*
|
|
* Use a conservative timeout for RPCs other than getattr,
|
|
* lookup, read or write. The justification for doing "other"
|
|
* this way is that these RPCs happen so infrequently that
|
|
* timer est. would probably be stale. Also, since many of
|
|
* these RPCs are non-idempotent, a conservative timeout is
|
|
* desired.
|
|
*/
|
|
timer = nfs_rto_timer(procnum);
|
|
if (timer != NFS_DEFAULT_TIMER)
|
|
ext.rc_timers = &nmp->nm_timers[timer - 1];
|
|
else
|
|
ext.rc_timers = NULL;
|
|
|
|
#ifdef KDTRACE_HOOKS
|
|
if (dtrace_nfsclient_nfs23_start_probe != NULL) {
|
|
uint32_t probe_id;
|
|
int probe_procnum;
|
|
|
|
if (nmp->nm_flag & NFSMNT_NFSV3) {
|
|
probe_id = nfsclient_nfs3_start_probes[procnum];
|
|
probe_procnum = procnum;
|
|
} else {
|
|
probe_id = nfsclient_nfs2_start_probes[procnum];
|
|
probe_procnum = nfsv2_procid[procnum];
|
|
}
|
|
if (probe_id != 0)
|
|
(dtrace_nfsclient_nfs23_start_probe)(probe_id, vp,
|
|
mreq, cred, probe_procnum);
|
|
}
|
|
#endif
|
|
|
|
nfsstats.rpcrequests++;
|
|
tryagain:
|
|
timo.tv_sec = nmp->nm_timeo / NFS_HZ;
|
|
timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ;
|
|
mrep = NULL;
|
|
stat = CLNT_CALL_MBUF(nmp->nm_client, &ext,
|
|
(nmp->nm_flag & NFSMNT_NFSV3) ? procnum : nfsv2_procid[procnum],
|
|
mreq, &mrep, timo);
|
|
|
|
/*
|
|
* 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)
|
|
goto nfsmout;
|
|
|
|
KASSERT(mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
|
|
|
|
/*
|
|
* Search for any mbufs that are not a multiple of 4 bytes long
|
|
* or with m_data not longword aligned.
|
|
* These could cause pointer alignment problems, so copy them to
|
|
* well aligned mbufs.
|
|
*/
|
|
error = nfs_realign(&mrep, M_DONTWAIT);
|
|
if (error == ENOMEM) {
|
|
m_freem(mrep);
|
|
AUTH_DESTROY(auth);
|
|
return (error);
|
|
}
|
|
|
|
md = mrep;
|
|
dpos = mtod(mrep, caddr_t);
|
|
tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl != 0) {
|
|
error = fxdr_unsigned(int, *tl);
|
|
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
|
|
error == NFSERR_TRYLATER) {
|
|
m_freem(mrep);
|
|
error = 0;
|
|
waituntil = time_second + nfs3_jukebox_delay;
|
|
while (time_second < waituntil)
|
|
(void)tsleep(&fake_wchan, PSOCK, "nqnfstry",
|
|
hz);
|
|
goto tryagain;
|
|
}
|
|
|
|
/*
|
|
* If the File Handle was stale, invalidate the lookup
|
|
* cache, just in case.
|
|
*/
|
|
if (error == ESTALE)
|
|
nfs_purgecache(vp);
|
|
/*
|
|
* Skip wcc data on NFS errors for now. NetApp filers
|
|
* return corrupt postop attrs in the wcc data for NFS
|
|
* err EROFS. Not sure if they could return corrupt
|
|
* postop attrs for others errors.
|
|
*/
|
|
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
|
|
!nfs_skip_wcc_data_onerr) {
|
|
*mrp = mrep;
|
|
*mdp = md;
|
|
*dposp = dpos;
|
|
error |= NFSERR_RETERR;
|
|
} else
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
|
|
#ifdef KDTRACE_HOOKS
|
|
if (dtrace_nfsclient_nfs23_done_probe != NULL) {
|
|
uint32_t probe_id;
|
|
int probe_procnum;
|
|
|
|
if (nmp->nm_flag & NFSMNT_NFSV3) {
|
|
probe_id = nfsclient_nfs3_done_probes[procnum];
|
|
probe_procnum = procnum;
|
|
} else {
|
|
probe_id = nfsclient_nfs2_done_probes[procnum];
|
|
probe_procnum = (nmp->nm_flag & NFSMNT_NFSV3) ?
|
|
procnum : nfsv2_procid[procnum];
|
|
}
|
|
if (probe_id != 0)
|
|
(dtrace_nfsclient_nfs23_done_probe)(probe_id, vp,
|
|
mreq, cred, probe_procnum, 0);
|
|
}
|
|
#endif
|
|
m_freem(mreq);
|
|
*mrp = mrep;
|
|
*mdp = md;
|
|
*dposp = dpos;
|
|
AUTH_DESTROY(auth);
|
|
return (0);
|
|
|
|
nfsmout:
|
|
#ifdef KDTRACE_HOOKS
|
|
if (dtrace_nfsclient_nfs23_done_probe != NULL) {
|
|
uint32_t probe_id;
|
|
int probe_procnum;
|
|
|
|
if (nmp->nm_flag & NFSMNT_NFSV3) {
|
|
probe_id = nfsclient_nfs3_done_probes[procnum];
|
|
probe_procnum = procnum;
|
|
} else {
|
|
probe_id = nfsclient_nfs2_done_probes[procnum];
|
|
probe_procnum = (nmp->nm_flag & NFSMNT_NFSV3) ?
|
|
procnum : nfsv2_procid[procnum];
|
|
}
|
|
if (probe_id != 0)
|
|
(dtrace_nfsclient_nfs23_done_probe)(probe_id, vp,
|
|
mreq, cred, probe_procnum, error);
|
|
}
|
|
#endif
|
|
m_freem(mreq);
|
|
if (auth)
|
|
AUTH_DESTROY(auth);
|
|
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
|
|
nfs_nmcancelreqs(struct nfsmount *nmp)
|
|
{
|
|
|
|
if (nmp->nm_client)
|
|
CLNT_CLOSE(nmp->nm_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 nfs_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(nfs_sig_set)/sizeof(int) ; i++)
|
|
if (SIGISMEMBER(set, nfs_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
|
|
nfs_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(nfs_sig_set)/sizeof(int) ; i++) {
|
|
/*
|
|
* But make sure we leave the ones already masked
|
|
* by the process, i.e. remove the signal from the
|
|
* temporary signalmask only if it wasn't already
|
|
* in p_sigmask.
|
|
*/
|
|
if (!SIGISMEMBER(td->td_sigmask, nfs_sig_set[i]) &&
|
|
!SIGISMEMBER(p->p_sigacts->ps_sigignore, nfs_sig_set[i]))
|
|
SIGDELSET(newset, nfs_sig_set[i]);
|
|
}
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
PROC_UNLOCK(p);
|
|
kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0);
|
|
}
|
|
|
|
void
|
|
nfs_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
|
|
nfs_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 */
|
|
nfs_set_sigmask(td, &oldset);
|
|
error = msleep(ident, mtx, priority, wmesg, timo);
|
|
nfs_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
|
|
nfs_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, "nfs server %s: %s, error %d\n", server,
|
|
msg, error);
|
|
else
|
|
tprintf(p, LOG_INFO, "nfs 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);
|
|
}
|