freebsd-dev/sys/nfsclient/nfs_krpc.c
Doug Rabson a9148abd9d Implement support for RPCSEC_GSS authentication to both the NFS client
and server. This replaces the RPC implementation of the NFS client and
server with the newer RPC implementation originally developed
(actually ported from the userland sunrpc code) to support the NFS
Lock Manager.  I have tested this code extensively and I believe it is
stable and that performance is at least equal to the legacy RPC
implementation.

The NFS code currently contains support for both the new RPC
implementation and the older legacy implementation inherited from the
original NFS codebase. The default is to use the new implementation -
add the NFS_LEGACYRPC option to fall back to the old code. When I
merge this support back to RELENG_7, I will probably change this so
that users have to 'opt in' to get the new code.

To use RPCSEC_GSS on either client or server, you must build a kernel
which includes the KGSSAPI option and the crypto device. On the
userland side, you must build at least a new libc, mountd, mount_nfs
and gssd. You must install new versions of /etc/rc.d/gssd and
/etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf.

As long as gssd is running, you should be able to mount an NFS
filesystem from a server that requires RPCSEC_GSS authentication. The
mount itself can happen without any kerberos credentials but all
access to the filesystem will be denied unless the accessing user has
a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There
is currently no support for situations where the ticket file is in a
different place, such as when the user logged in via SSH and has
delegated credentials from that login. This restriction is also
present in Solaris and Linux. In theory, we could improve this in
future, possibly using Brooks Davis' implementation of variant
symlinks.

Supporting RPCSEC_GSS on a server is nearly as simple. You must create
service creds for the server in the form 'nfs/<fqdn>@<REALM>' and
install them in /etc/krb5.keytab. The standard heimdal utility ktutil
makes this fairly easy. After the service creds have been created, you
can add a '-sec=krb5' option to /etc/exports and restart both mountd
and nfsd.

The only other difference an administrator should notice is that nfsd
doesn't fork to create service threads any more. In normal operation,
there will be two nfsd processes, one in userland waiting for TCP
connections and one in the kernel handling requests. The latter
process will create as many kthreads as required - these should be
visible via 'top -H'. The code has some support for varying the number
of service threads according to load but initially at least, nfsd uses
a fixed number of threads according to the value supplied to its '-n'
option.

Sponsored by:	Isilon Systems
MFC after:	1 month
2008-11-03 10:38:00 +00:00

770 lines
20 KiB
C

/*-
* Copyright (c) 1989, 1991, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs_socket.c 8.5 (Berkeley) 3/30/95
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Socket operations for use by nfs
*/
#include "opt_inet6.h"
#include "opt_kgssapi.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/vnode.h>
#include <rpc/rpc.h>
#include <rpc/rpcclnt.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfsclient/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfsclient/nfsm_subs.h>
#include <nfsclient/nfsmount.h>
#include <nfsclient/nfsnode.h>
#include <nfs4client/nfs4.h>
#ifndef NFS_LEGACYRPC
static int nfs_realign_test;
static int nfs_realign_count;
static int nfs_bufpackets = 4;
static int nfs_reconnects;
static int nfs3_jukebox_delay = 10;
static int nfs_skip_wcc_data_onerr = 1;
static int fake_wchan;
SYSCTL_DECL(_vfs_nfs);
SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test, 0,
"Number of realign tests done");
SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count, 0,
"Number of mbuf realignments done");
SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
"Buffer reservation size 2 < x < 64");
SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
"Number of times the nfs client has had to reconnect");
SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
"Number of seconds to delay a retry after receiving EJUKEBOX");
SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
"Disable weak cache consistency checking when server returns an error");
static void nfs_down(struct nfsmount *, struct thread *, const char *,
int, int);
static void nfs_up(struct nfsmount *, struct thread *, const char *,
int, int);
static int nfs_msg(struct thread *, const char *, const char *, int);
extern int nfsv2_procid[];
struct nfs_cached_auth {
int ca_refs; /* refcount, including 1 from the cache */
uid_t ca_uid; /* uid that corresponds to this auth */
AUTH *ca_auth; /* RPC auth handle */
};
/*
* RTT estimator
*/
static enum nfs_rto_timer_t nfs_proct[NFS_NPROCS] = {
NFS_DEFAULT_TIMER, /* NULL */
NFS_GETATTR_TIMER, /* GETATTR */
NFS_DEFAULT_TIMER, /* SETATTR */
NFS_LOOKUP_TIMER, /* LOOKUP */
NFS_GETATTR_TIMER, /* ACCESS */
NFS_READ_TIMER, /* READLINK */
NFS_READ_TIMER, /* READ */
NFS_WRITE_TIMER, /* WRITE */
NFS_DEFAULT_TIMER, /* CREATE */
NFS_DEFAULT_TIMER, /* MKDIR */
NFS_DEFAULT_TIMER, /* SYMLINK */
NFS_DEFAULT_TIMER, /* MKNOD */
NFS_DEFAULT_TIMER, /* REMOVE */
NFS_DEFAULT_TIMER, /* RMDIR */
NFS_DEFAULT_TIMER, /* RENAME */
NFS_DEFAULT_TIMER, /* LINK */
NFS_READ_TIMER, /* READDIR */
NFS_READ_TIMER, /* READDIRPLUS */
NFS_DEFAULT_TIMER, /* FSSTAT */
NFS_DEFAULT_TIMER, /* FSINFO */
NFS_DEFAULT_TIMER, /* PATHCONF */
NFS_DEFAULT_TIMER, /* COMMIT */
NFS_DEFAULT_TIMER, /* NOOP */
};
/*
* Choose the correct RTT timer for this NFS procedure.
*/
static inline enum nfs_rto_timer_t
nfs_rto_timer(u_int32_t procnum)
{
return nfs_proct[procnum];
}
/*
* Initialize the RTT estimator state for a new mount point.
*/
static void
nfs_init_rtt(struct nfsmount *nmp)
{
int i;
for (i = 0; i < NFS_MAX_TIMER; i++) {
nmp->nm_timers[i].rt_srtt = hz;
nmp->nm_timers[i].rt_deviate = 0;
nmp->nm_timers[i].rt_rtxcur = hz;
}
}
/*
* Initialize sockets and congestion for a new NFS connection.
* We do not free the sockaddr if error.
*/
int
nfs_connect(struct nfsmount *nmp, struct nfsreq *rep)
{
int rcvreserve, sndreserve;
int pktscale;
struct sockaddr *saddr;
struct ucred *origcred;
struct thread *td = curthread;
CLIENT *client;
struct netconfig *nconf;
rpcvers_t vers;
int one = 1, retries;
/*
* We need to establish the socket using the credentials of
* the mountpoint. Some parts of this process (such as
* sobind() and soconnect()) will use the curent thread's
* credential instead of the socket credential. To work
* around this, temporarily change the current thread's
* credential to that of the mountpoint.
*
* XXX: It would be better to explicitly pass the correct
* credential to sobind() and soconnect().
*/
origcred = td->td_ucred;
td->td_ucred = nmp->nm_mountp->mnt_cred;
saddr = nmp->nm_nam;
vers = NFS_VER2;
if (nmp->nm_flag & NFSMNT_NFSV3)
vers = NFS_VER3;
else if (nmp->nm_flag & NFSMNT_NFSV4)
vers = NFS_VER4;
if (saddr->sa_family == AF_INET)
if (nmp->nm_sotype == SOCK_DGRAM)
nconf = getnetconfigent("udp");
else
nconf = getnetconfigent("tcp");
else
if (nmp->nm_sotype == SOCK_DGRAM)
nconf = getnetconfigent("udp6");
else
nconf = getnetconfigent("tcp6");
/*
* Get buffer reservation size from sysctl, but impose reasonable
* limits.
*/
pktscale = nfs_bufpackets;
if (pktscale < 2)
pktscale = 2;
if (pktscale > 64)
pktscale = 64;
mtx_lock(&nmp->nm_mtx);
if (nmp->nm_sotype == SOCK_DGRAM) {
sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
NFS_MAXPKTHDR) * pktscale;
} else if (nmp->nm_sotype == SOCK_SEQPACKET) {
sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
NFS_MAXPKTHDR) * pktscale;
} else {
if (nmp->nm_sotype != SOCK_STREAM)
panic("nfscon sotype");
sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR +
sizeof (u_int32_t)) * pktscale;
rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR +
sizeof (u_int32_t)) * pktscale;
}
mtx_unlock(&nmp->nm_mtx);
client = clnt_reconnect_create(nconf, saddr, NFS_PROG, vers,
sndreserve, rcvreserve);
CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq");
if (nmp->nm_flag & NFSMNT_INT)
CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
if (nmp->nm_flag & NFSMNT_RESVPORT)
CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
if (nmp->nm_flag & NFSMNT_SOFT)
retries = nmp->nm_retry;
else
retries = INT_MAX;
CLNT_CONTROL(client, CLSET_RETRIES, &retries);
mtx_lock(&nmp->nm_mtx);
if (nmp->nm_client) {
/*
* Someone else already connected.
*/
CLNT_RELEASE(client);
} else {
nmp->nm_client = client;
}
/*
* Protocols that do not require connections may be optionally left
* unconnected for servers that reply from a port other than NFS_PORT.
*/
if (!(nmp->nm_flag & NFSMNT_NOCONN)) {
mtx_unlock(&nmp->nm_mtx);
CLNT_CONTROL(client, CLSET_CONNECT, &one);
} else {
mtx_unlock(&nmp->nm_mtx);
}
/* Restore current thread's credentials. */
td->td_ucred = origcred;
mtx_lock(&nmp->nm_mtx);
/* Initialize other non-zero congestion variables */
nfs_init_rtt(nmp);
mtx_unlock(&nmp->nm_mtx);
return (0);
}
/*
* NFS disconnect. Clean up and unlink.
*/
void
nfs_disconnect(struct nfsmount *nmp)
{
CLIENT *client;
mtx_lock(&nmp->nm_mtx);
if (nmp->nm_client) {
client = nmp->nm_client;
nmp->nm_client = NULL;
mtx_unlock(&nmp->nm_mtx);
#ifdef KGSSAPI
rpc_gss_secpurge(client);
#endif
CLNT_CLOSE(client);
CLNT_RELEASE(client);
} else {
mtx_unlock(&nmp->nm_mtx);
}
}
void
nfs_safedisconnect(struct nfsmount *nmp)
{
nfs_disconnect(nmp);
}
static AUTH *
nfs_getauth(struct nfsmount *nmp, struct ucred *cred)
{
#ifdef KGSSAPI
rpc_gss_service_t svc;
AUTH *auth;
#endif
switch (nmp->nm_secflavor) {
#ifdef KGSSAPI
case RPCSEC_GSS_KRB5:
case RPCSEC_GSS_KRB5I:
case RPCSEC_GSS_KRB5P:
if (!nmp->nm_mech_oid) {
if (!rpc_gss_mech_to_oid("kerberosv5",
&nmp->nm_mech_oid))
return (NULL);
}
if (nmp->nm_secflavor == RPCSEC_GSS_KRB5)
svc = rpc_gss_svc_none;
else if (nmp->nm_secflavor == RPCSEC_GSS_KRB5I)
svc = rpc_gss_svc_integrity;
else
svc = rpc_gss_svc_privacy;
auth = rpc_gss_secfind(nmp->nm_client, cred,
nmp->nm_principal, nmp->nm_mech_oid, svc);
if (auth)
return (auth);
/* fallthrough */
#endif
case AUTH_SYS:
default:
return (authunix_create(cred));
}
}
/*
* Callback from the RPC code to generate up/down notifications.
*/
struct nfs_feedback_arg {
struct nfsmount *nf_mount;
int nf_lastmsg; /* last tprintf */
int nf_tprintfmsg;
struct thread *nf_td;
};
static void
nfs_feedback(int type, int proc, void *arg)
{
struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
struct nfsmount *nmp = nf->nf_mount;
struct timeval now;
getmicrouptime(&now);
switch (type) {
case FEEDBACK_REXMIT2:
case FEEDBACK_RECONNECT:
if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) {
nfs_down(nmp, nf->nf_td,
"not responding", 0, NFSSTA_TIMEO);
nf->nf_tprintfmsg = TRUE;
nf->nf_lastmsg = now.tv_sec;
}
break;
case FEEDBACK_OK:
nfs_up(nf->nf_mount, nf->nf_td,
"is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
break;
}
}
/*
* nfs_request - goes something like this
* - fill in request struct
* - links it into list
* - calls nfs_send() for first transmit
* - calls nfs_receive() to get reply
* - break down rpc header and return with nfs reply pointed to
* by mrep or error
* nb: always frees up mreq mbuf list
*/
int
nfs_request(struct vnode *vp, struct mbuf *mreq, int procnum,
struct thread *td, struct ucred *cred, struct mbuf **mrp,
struct mbuf **mdp, caddr_t *dposp)
{
struct mbuf *mrep;
u_int32_t *tl;
struct nfsmount *nmp;
struct mbuf *md;
time_t waituntil;
caddr_t dpos;
int error = 0;
struct timeval now;
AUTH *auth = NULL;
enum nfs_rto_timer_t timer;
struct nfs_feedback_arg nf;
struct rpc_callextra ext;
enum clnt_stat stat;
struct timeval timo;
/* Reject requests while attempting a forced unmount. */
if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF) {
m_freem(mreq);
return (ESTALE);
}
nmp = VFSTONFS(vp->v_mount);
if ((nmp->nm_flag & NFSMNT_NFSV4) != 0)
return nfs4_request(vp, mreq, procnum, td, cred, mrp, mdp, dposp);
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));
/*
* 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, NULL);
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;
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;
}
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;
}
md = mrep;
if (error) {
m_freem(mreq);
AUTH_DESTROY(auth);
return (error);
}
KASSERT(mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
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)
cache_purge(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);
m_freem(mreq);
AUTH_DESTROY(auth);
return (error);
}
m_freem(mreq);
*mrp = mrep;
*mdp = md;
*dposp = dpos;
AUTH_DESTROY(auth);
return (0);
nfsmout:
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, ie. 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 nfsreq *rep, struct thread *td)
{
struct proc *p;
sigset_t tmpset;
if ((nmp->nm_flag & NFSMNT_NFSV4) != 0)
return nfs4_sigintr(nmp, rep, td);
/* 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);
}
#endif /* !NFS_LEGACYRPC */