sys/fs/nfs/nfs_commonkrpc.c

   1 /*-
   2  * Copyright (c) 1989, 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 /*
  38  * Socket operations for use by nfs
  39  */
  40
  41 #include "opt_kdtrace.h"
  42 #include "opt_kgssapi.h"
  43 #include "opt_nfs.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/kernel.h>
  48 #include <sys/limits.h>
  49 #include <sys/lock.h>
  50 #include <sys/malloc.h>
  51 #include <sys/mbuf.h>
  52 #include <sys/mount.h>
  53 #include <sys/mutex.h>
  54 #include <sys/proc.h>
  55 #include <sys/signalvar.h>
  56 #include <sys/syscallsubr.h>
  57 #include <sys/sysctl.h>
  58 #include <sys/syslog.h>
  59 #include <sys/vnode.h>
  60
  61 #include <rpc/rpc.h>
  62
  63 #include <kgssapi/krb5/kcrypto.h>
  64
  65 #include <fs/nfs/nfsport.h>
  66
  67 #ifdef KDTRACE_HOOKS
  68 #include <sys/dtrace_bsd.h>
  69
  70 dtrace_nfsclient_nfs23_start_probe_func_t
  71                 dtrace_nfscl_nfs234_start_probe;
  72
  73 dtrace_nfsclient_nfs23_done_probe_func_t
  74                 dtrace_nfscl_nfs234_done_probe;
  75
  76 /*
  77  * Registered probes by RPC type.
  78  */
  79 uint32_t        nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
  80 uint32_t        nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
  81
  82 uint32_t        nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
  83 uint32_t        nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
  84
  85 uint32_t        nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
  86 uint32_t        nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
  87 #endif
  88
  89 NFSSTATESPINLOCK;
  90 NFSREQSPINLOCK;
  91 NFSDLOCKMUTEX;
  92 extern struct nfsstats newnfsstats;
  93 extern struct nfsreqhead nfsd_reqq;
  94 extern int nfscl_ticks;
  95 extern void (*ncl_call_invalcaches)(struct vnode *);
  96 extern int nfs_numnfscbd;
  97 extern int nfscl_debuglevel;
  98
  99 SVCPOOL         *nfscbd_pool;
 100 static int      nfsrv_gsscallbackson = 0;
 101 static int      nfs_bufpackets = 4;
 102 static int      nfs_reconnects;
 103 static int      nfs3_jukebox_delay = 10;
 104 static int      nfs_skip_wcc_data_onerr = 1;
 105
 106 SYSCTL_DECL(_vfs_nfs);
 107
 108 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
 109     "Buffer reservation size 2 < x < 64");
 110 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
 111     "Number of times the nfs client has had to reconnect");
 112 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
 113     "Number of seconds to delay a retry after receiving EJUKEBOX");
 114 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
 115     "Disable weak cache consistency checking when server returns an error");
 116
 117 static void     nfs_down(struct nfsmount *, struct thread *, const char *,
 118     int, int);
 119 static void     nfs_up(struct nfsmount *, struct thread *, const char *,
 120     int, int);
 121 static int      nfs_msg(struct thread *, const char *, const char *, int);
 122
 123 struct nfs_cached_auth {
 124         int             ca_refs; /* refcount, including 1 from the cache */
 125         uid_t           ca_uid;  /* uid that corresponds to this auth */
 126         AUTH            *ca_auth; /* RPC auth handle */
 127 };
 128
 129 static int nfsv2_procid[NFS_V3NPROCS] = {
 130         NFSV2PROC_NULL,
 131         NFSV2PROC_GETATTR,
 132         NFSV2PROC_SETATTR,
 133         NFSV2PROC_LOOKUP,
 134         NFSV2PROC_NOOP,
 135         NFSV2PROC_READLINK,
 136         NFSV2PROC_READ,
 137         NFSV2PROC_WRITE,
 138         NFSV2PROC_CREATE,
 139         NFSV2PROC_MKDIR,
 140         NFSV2PROC_SYMLINK,
 141         NFSV2PROC_CREATE,
 142         NFSV2PROC_REMOVE,
 143         NFSV2PROC_RMDIR,
 144         NFSV2PROC_RENAME,
 145         NFSV2PROC_LINK,
 146         NFSV2PROC_READDIR,
 147         NFSV2PROC_NOOP,
 148         NFSV2PROC_STATFS,
 149         NFSV2PROC_NOOP,
 150         NFSV2PROC_NOOP,
 151         NFSV2PROC_NOOP,
 152 };
 153
 154 /*
 155  * Initialize sockets and congestion for a new NFS connection.
 156  * We do not free the sockaddr if error.
 157  */
 158 int
 159 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
 160     struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
 161 {
 162         int rcvreserve, sndreserve;
 163         int pktscale;
 164         struct sockaddr *saddr;
 165         struct ucred *origcred;
 166         CLIENT *client;
 167         struct netconfig *nconf;
 168         struct socket *so;
 169         int one = 1, retries, error = 0;
 170         struct thread *td = curthread;
 171         SVCXPRT *xprt;
 172         struct timeval timo;
 173
 174         /*
 175          * We need to establish the socket using the credentials of
 176          * the mountpoint.  Some parts of this process (such as
 177          * sobind() and soconnect()) will use the curent thread's
 178          * credential instead of the socket credential.  To work
 179          * around this, temporarily change the current thread's
 180          * credential to that of the mountpoint.
 181          *
 182          * XXX: It would be better to explicitly pass the correct
 183          * credential to sobind() and soconnect().
 184          */
 185         origcred = td->td_ucred;
 186
 187         /*
 188          * Use the credential in nr_cred, if not NULL.
 189          */
 190         if (nrp->nr_cred != NULL)
 191                 td->td_ucred = nrp->nr_cred;
 192         else
 193                 td->td_ucred = cred;
 194         saddr = nrp->nr_nam;
 195
 196         if (saddr->sa_family == AF_INET)
 197                 if (nrp->nr_sotype == SOCK_DGRAM)
 198                         nconf = getnetconfigent("udp");
 199                 else
 200                         nconf = getnetconfigent("tcp");
 201         else
 202                 if (nrp->nr_sotype == SOCK_DGRAM)
 203                         nconf = getnetconfigent("udp6");
 204                 else
 205                         nconf = getnetconfigent("tcp6");
 206
 207         pktscale = nfs_bufpackets;
 208         if (pktscale < 2)
 209                 pktscale = 2;
 210         if (pktscale > 64)
 211                 pktscale = 64;
 212         /*
 213          * soreserve() can fail if sb_max is too small, so shrink pktscale
 214          * and try again if there is an error.
 215          * Print a log message suggesting increasing sb_max.
 216          * Creating a socket and doing this is necessary since, if the
 217          * reservation sizes are too large and will make soreserve() fail,
 218          * the connection will work until a large send is attempted and
 219          * then it will loop in the krpc code.
 220          */
 221         so = NULL;
 222         saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
 223         error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
 224             nrp->nr_soproto, td->td_ucred, td);
 225         if (error) {
 226                 td->td_ucred = origcred;
 227                 goto out;
 228         }
 229         do {
 230             if (error != 0 && pktscale > 2)
 231                 pktscale--;
 232             if (nrp->nr_sotype == SOCK_DGRAM) {
 233                 if (nmp != NULL) {
 234                         sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 235                             pktscale;
 236                         rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 237                             pktscale;
 238                 } else {
 239                         sndreserve = rcvreserve = 1024 * pktscale;
 240                 }
 241             } else {
 242                 if (nrp->nr_sotype != SOCK_STREAM)
 243                         panic("nfscon sotype");
 244                 if (nmp != NULL) {
 245                         sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 246                             sizeof (u_int32_t)) * pktscale;
 247                         rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 248                             sizeof (u_int32_t)) * pktscale;
 249                 } else {
 250                         sndreserve = rcvreserve = 1024 * pktscale;
 251                 }
 252             }
 253             error = soreserve(so, sndreserve, rcvreserve);
 254         } while (error != 0 && pktscale > 2);
 255         soclose(so);
 256         if (error) {
 257                 td->td_ucred = origcred;
 258                 goto out;
 259         }
 260
 261         client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
 262             nrp->nr_vers, sndreserve, rcvreserve);
 263         CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
 264         if (nmp != NULL) {
 265                 if ((nmp->nm_flag & NFSMNT_INT))
 266                         CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
 267                 if ((nmp->nm_flag & NFSMNT_RESVPORT))
 268                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 269                 if (NFSHASSOFT(nmp)) {
 270                         if (nmp->nm_sotype == SOCK_DGRAM)
 271                                 /*
 272                                  * For UDP, the large timeout for a reconnect
 273                                  * will be set to "nm_retry * nm_timeo / 2", so
 274                                  * we only want to do 2 reconnect timeout
 275                                  * retries.
 276                                  */
 277                                 retries = 2;
 278                         else
 279                                 retries = nmp->nm_retry;
 280                 } else
 281                         retries = INT_MAX;
 282                 if (NFSHASNFSV4N(nmp)) {
 283                         /*
 284                          * Make sure the nfscbd_pool doesn't get destroyed
 285                          * while doing this.
 286                          */
 287                         NFSD_LOCK();
 288                         if (nfs_numnfscbd > 0) {
 289                                 nfs_numnfscbd++;
 290                                 NFSD_UNLOCK();
 291                                 xprt = svc_vc_create_backchannel(nfscbd_pool);
 292                                 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
 293                                 NFSD_LOCK();
 294                                 nfs_numnfscbd--;
 295                                 if (nfs_numnfscbd == 0)
 296                                         wakeup(&nfs_numnfscbd);
 297                         }
 298                         NFSD_UNLOCK();
 299                 }
 300         } else {
 301                 /*
 302                  * Three cases:
 303                  * - Null RPC callback to client
 304                  * - Non-Null RPC callback to client, wait a little longer
 305                  * - upcalls to nfsuserd and gssd (clp == NULL)
 306                  */
 307                 if (callback_retry_mult == 0) {
 308                         retries = NFSV4_UPCALLRETRY;
 309                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 310                 } else {
 311                         retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
 312                 }
 313         }
 314         CLNT_CONTROL(client, CLSET_RETRIES, &retries);
 315
 316         if (nmp != NULL) {
 317                 /*
 318                  * For UDP, there are 2 timeouts:
 319                  * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
 320                  *   that does a retransmit of an RPC request using the same
 321                  *   socket and xid. This is what you normally want to do,
 322                  *   since NFS servers depend on "same xid" for their
 323                  *   Duplicate Request Cache.
 324                  * - timeout specified in CLNT_CALL_MBUF(), which specifies when
 325                  *   retransmits on the same socket should fail and a fresh
 326                  *   socket created. Each of these timeouts counts as one
 327                  *   CLSET_RETRIES as set above.
 328                  * Set the initial retransmit timeout for UDP. This timeout
 329                  * doesn't exist for TCP and the following call just fails,
 330                  * which is ok.
 331                  */
 332                 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
 333                 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
 334                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
 335         }
 336
 337         mtx_lock(&nrp->nr_mtx);
 338         if (nrp->nr_client != NULL) {
 339                 /*
 340                  * Someone else already connected.
 341                  */
 342                 CLNT_RELEASE(client);
 343         } else {
 344                 nrp->nr_client = client;
 345         }
 346
 347         /*
 348          * Protocols that do not require connections may be optionally left
 349          * unconnected for servers that reply from a port other than NFS_PORT.
 350          */
 351         if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
 352                 mtx_unlock(&nrp->nr_mtx);
 353                 CLNT_CONTROL(client, CLSET_CONNECT, &one);
 354         } else {
 355                 mtx_unlock(&nrp->nr_mtx);
 356         }
 357
 358         /* Restore current thread's credentials. */
 359         td->td_ucred = origcred;
 360
 361 out:
 362         NFSEXITCODE(error);
 363         return (error);
 364 }
 365
 366 /*
 367  * NFS disconnect. Clean up and unlink.
 368  */
 369 void
 370 newnfs_disconnect(struct nfssockreq *nrp)
 371 {
 372         CLIENT *client;
 373
 374         mtx_lock(&nrp->nr_mtx);
 375         if (nrp->nr_client != NULL) {
 376                 client = nrp->nr_client;
 377                 nrp->nr_client = NULL;
 378                 mtx_unlock(&nrp->nr_mtx);
 379                 rpc_gss_secpurge_call(client);
 380                 CLNT_CLOSE(client);
 381                 CLNT_RELEASE(client);
 382         } else {
 383                 mtx_unlock(&nrp->nr_mtx);
 384         }
 385 }
 386
 387 static AUTH *
 388 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
 389     char *srv_principal, gss_OID mech_oid, struct ucred *cred)
 390 {
 391         rpc_gss_service_t svc;
 392         AUTH *auth;
 393
 394         switch (secflavour) {
 395         case RPCSEC_GSS_KRB5:
 396         case RPCSEC_GSS_KRB5I:
 397         case RPCSEC_GSS_KRB5P:
 398                 if (!mech_oid) {
 399                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 400                                 return (NULL);
 401                 }
 402                 if (secflavour == RPCSEC_GSS_KRB5)
 403                         svc = rpc_gss_svc_none;
 404                 else if (secflavour == RPCSEC_GSS_KRB5I)
 405                         svc = rpc_gss_svc_integrity;
 406                 else
 407                         svc = rpc_gss_svc_privacy;
 408
 409                 if (clnt_principal == NULL)
 410                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 411                             srv_principal, mech_oid, svc);
 412                 else {
 413                         auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
 414                             clnt_principal, srv_principal, "kerberosv5",
 415                             svc, NULL, NULL, NULL);
 416                         return (auth);
 417                 }
 418                 if (auth != NULL)
 419                         return (auth);
 420                 /* fallthrough */
 421         case AUTH_SYS:
 422         default:
 423                 return (authunix_create(cred));
 424
 425         }
 426 }
 427
 428 /*
 429  * Callback from the RPC code to generate up/down notifications.
 430  */
 431
 432 struct nfs_feedback_arg {
 433         struct nfsmount *nf_mount;
 434         int             nf_lastmsg;     /* last tprintf */
 435         int             nf_tprintfmsg;
 436         struct thread   *nf_td;
 437 };
 438
 439 static void
 440 nfs_feedback(int type, int proc, void *arg)
 441 {
 442         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 443         struct nfsmount *nmp = nf->nf_mount;
 444         time_t now;
 445
 446         switch (type) {
 447         case FEEDBACK_REXMIT2:
 448         case FEEDBACK_RECONNECT:
 449                 now = NFSD_MONOSEC;
 450                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 451                         nfs_down(nmp, nf->nf_td,
 452                             "not responding", 0, NFSSTA_TIMEO);
 453                         nf->nf_tprintfmsg = TRUE;
 454                         nf->nf_lastmsg = now;
 455                 }
 456                 break;
 457
 458         case FEEDBACK_OK:
 459                 nfs_up(nf->nf_mount, nf->nf_td,
 460                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 461                 break;
 462         }
 463 }
 464
 465 /*
 466  * newnfs_request - goes something like this
 467  *      - does the rpc by calling the krpc layer
 468  *      - break down rpc header and return with nfs reply
 469  * nb: always frees up nd_mreq mbuf list
 470  */
 471 int
 472 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 473     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 474     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 475     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
 476 {
 477         u_int32_t retseq, retval, *tl;
 478         time_t waituntil;
 479         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 480         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 481         int freeslot, timeo;
 482         u_int16_t procnum;
 483         u_int trylater_delay = 1;
 484         struct nfs_feedback_arg nf;
 485         struct timeval timo;
 486         AUTH *auth;
 487         struct rpc_callextra ext;
 488         enum clnt_stat stat;
 489         struct nfsreq *rep = NULL;
 490         char *srv_principal = NULL, *clnt_principal = NULL;
 491         sigset_t oldset;
 492         struct ucred *authcred;
 493
 494         if (xidp != NULL)
 495                 *xidp = 0;
 496         /* Reject requests while attempting a forced unmount. */
 497         if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
 498                 m_freem(nd->nd_mreq);
 499                 return (ESTALE);
 500         }
 501
 502         /*
 503          * Set authcred, which is used to acquire RPC credentials to
 504          * the cred argument, by default. The crhold() should not be
 505          * necessary, but will ensure that some future code change
 506          * doesn't result in the credential being free'd prematurely.
 507          */
 508         authcred = crhold(cred);
 509
 510         /* For client side interruptible mounts, mask off the signals. */
 511         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 512                 newnfs_set_sigmask(td, &oldset);
 513                 set_sigset = 1;
 514         }
 515
 516         /*
 517          * XXX if not already connected call nfs_connect now. Longer
 518          * term, change nfs_mount to call nfs_connect unconditionally
 519          * and let clnt_reconnect_create handle reconnects.
 520          */
 521         if (nrp->nr_client == NULL)
 522                 newnfs_connect(nmp, nrp, cred, td, 0);
 523
 524         /*
 525          * For a client side mount, nmp is != NULL and clp == NULL. For
 526          * server calls (callbacks or upcalls), nmp == NULL.
 527          */
 528         if (clp != NULL) {
 529                 NFSLOCKSTATE();
 530                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 531                         secflavour = RPCSEC_GSS_KRB5;
 532                         if (nd->nd_procnum != NFSPROC_NULL) {
 533                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 534                                         secflavour = RPCSEC_GSS_KRB5I;
 535                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 536                                         secflavour = RPCSEC_GSS_KRB5P;
 537                         }
 538                 }
 539                 NFSUNLOCKSTATE();
 540         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 541              nd->nd_procnum != NFSPROC_NULL) {
 542                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 543                         nd->nd_flag |= ND_USEGSSNAME;
 544                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 545                         /*
 546                          * If there is a client side host based credential,
 547                          * use that, otherwise use the system uid, if set.
 548                          * The system uid is in the nmp->nm_sockreq.nr_cred
 549                          * credentials.
 550                          */
 551                         if (nmp->nm_krbnamelen > 0) {
 552                                 usegssname = 1;
 553                                 clnt_principal = nmp->nm_krbname;
 554                         } else if (nmp->nm_uid != (uid_t)-1) {
 555                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 556                                     ("newnfs_request: NULL nr_cred"));
 557                                 crfree(authcred);
 558                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 559                         }
 560                 } else if (nmp->nm_krbnamelen == 0 &&
 561                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 562                         /*
 563                          * If there is no host based principal name and
 564                          * the system uid is set and this is root, use the
 565                          * system uid, since root won't have user
 566                          * credentials in a credentials cache file.
 567                          * The system uid is in the nmp->nm_sockreq.nr_cred
 568                          * credentials.
 569                          */
 570                         KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 571                             ("newnfs_request: NULL nr_cred"));
 572                         crfree(authcred);
 573                         authcred = crhold(nmp->nm_sockreq.nr_cred);
 574                 }
 575                 if (NFSHASINTEGRITY(nmp))
 576                         secflavour = RPCSEC_GSS_KRB5I;
 577                 else if (NFSHASPRIVACY(nmp))
 578                         secflavour = RPCSEC_GSS_KRB5P;
 579                 else
 580                         secflavour = RPCSEC_GSS_KRB5;
 581                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 582         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 583             nd->nd_procnum != NFSPROC_NULL &&
 584             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 585                 /*
 586                  * Use the uid that did the mount when the RPC is doing
 587                  * NFSv4 system operations, as indicated by the
 588                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 589                  * The credentials in nm_sockreq.nr_cred were used for the
 590                  * mount.
 591                  */
 592                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 593                     ("newnfs_request: NULL nr_cred"));
 594                 crfree(authcred);
 595                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 596         }
 597
 598         if (nmp != NULL) {
 599                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 600                 nf.nf_mount = nmp;
 601                 nf.nf_td = td;
 602                 nf.nf_lastmsg = NFSD_MONOSEC -
 603                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 604         }
 605
 606         if (nd->nd_procnum == NFSPROC_NULL)
 607                 auth = authnone_create();
 608         else if (usegssname) {
 609                 /*
 610                  * For this case, the authenticator is held in the
 611                  * nfssockreq structure, so don't release the reference count
 612                  * held on it. --> Don't AUTH_DESTROY() it in this function.
 613                  */
 614                 if (nrp->nr_auth == NULL)
 615                         nrp->nr_auth = nfs_getauth(nrp, secflavour,
 616                             clnt_principal, srv_principal, NULL, authcred);
 617                 else
 618                         rpc_gss_refresh_auth_call(nrp->nr_auth);
 619                 auth = nrp->nr_auth;
 620         } else
 621                 auth = nfs_getauth(nrp, secflavour, NULL,
 622                     srv_principal, NULL, authcred);
 623         crfree(authcred);
 624         if (auth == NULL) {
 625                 m_freem(nd->nd_mreq);
 626                 if (set_sigset)
 627                         newnfs_restore_sigmask(td, &oldset);
 628                 return (EACCES);
 629         }
 630         bzero(&ext, sizeof(ext));
 631         ext.rc_auth = auth;
 632         if (nmp != NULL) {
 633                 ext.rc_feedback = nfs_feedback;
 634                 ext.rc_feedback_arg = &nf;
 635         }
 636
 637         procnum = nd->nd_procnum;
 638         if ((nd->nd_flag & ND_NFSV4) &&
 639             nd->nd_procnum != NFSPROC_NULL &&
 640             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 641                 procnum = NFSV4PROC_COMPOUND;
 642
 643         if (nmp != NULL) {
 644                 NFSINCRGLOBAL(newnfsstats.rpcrequests);
 645
 646                 /* Map the procnum to the old NFSv2 one, as required. */
 647                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 648                         if (nd->nd_procnum < NFS_V3NPROCS)
 649                                 procnum = nfsv2_procid[nd->nd_procnum];
 650                         else
 651                                 procnum = NFSV2PROC_NOOP;
 652                 }
 653
 654                 /*
 655                  * Now only used for the R_DONTRECOVER case, but until that is
 656                  * supported within the krpc code, I need to keep a queue of
 657                  * outstanding RPCs for nfsv4 client requests.
 658                  */
 659                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 660                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 661                             M_NFSDREQ, M_WAITOK);
 662 #ifdef KDTRACE_HOOKS
 663                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 664                         uint32_t probe_id;
 665                         int probe_procnum;
 666
 667                         if (nd->nd_flag & ND_NFSV4) {
 668                                 probe_id =
 669                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 670                                 probe_procnum = nd->nd_procnum;
 671                         } else if (nd->nd_flag & ND_NFSV3) {
 672                                 probe_id = nfscl_nfs3_start_probes[procnum];
 673                                 probe_procnum = procnum;
 674                         } else {
 675                                 probe_id =
 676                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 677                                 probe_procnum = procnum;
 678                         }
 679                         if (probe_id != 0)
 680                                 (dtrace_nfscl_nfs234_start_probe)
 681                                     (probe_id, vp, nd->nd_mreq, cred,
 682                                      probe_procnum);
 683                 }
 684 #endif
 685         }
 686         trycnt = 0;
 687         freeslot = -1;          /* Set to slot that needs to be free'd */
 688 tryagain:
 689         slot = -1;              /* Slot that needs a sequence# increment. */
 690         /*
 691          * This timeout specifies when a new socket should be created,
 692          * along with new xid values. For UDP, this should be done
 693          * infrequently, since retransmits of RPC requests should normally
 694          * use the same xid.
 695          */
 696         if (nmp == NULL) {
 697                 timo.tv_usec = 0;
 698                 if (clp == NULL)
 699                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 700                 else
 701                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 702         } else {
 703                 if (nrp->nr_sotype != SOCK_DGRAM) {
 704                         timo.tv_usec = 0;
 705                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 706                                 timo.tv_sec = INT_MAX;
 707                         else
 708                                 timo.tv_sec = NFS_TCPTIMEO;
 709                 } else {
 710                         if (NFSHASSOFT(nmp)) {
 711                                 /*
 712                                  * CLSET_RETRIES is set to 2, so this should be
 713                                  * half of the total timeout required.
 714                                  */
 715                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 716                                 if (timeo < 1)
 717                                         timeo = 1;
 718                                 timo.tv_sec = timeo / NFS_HZ;
 719                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 720                                     NFS_HZ;
 721                         } else {
 722                                 /* For UDP hard mounts, use a large value. */
 723                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 724                                 timo.tv_usec = 0;
 725                         }
 726                 }
 727
 728                 if (rep != NULL) {
 729                         rep->r_flags = 0;
 730                         rep->r_nmp = nmp;
 731                         /*
 732                          * Chain request into list of outstanding requests.
 733                          */
 734                         NFSLOCKREQ();
 735                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 736                         NFSUNLOCKREQ();
 737                 }
 738         }
 739
 740         nd->nd_mrep = NULL;
 741         stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq,
 742             &nd->nd_mrep, timo);
 743
 744         if (rep != NULL) {
 745                 /*
 746                  * RPC done, unlink the request.
 747                  */
 748                 NFSLOCKREQ();
 749                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 750                 NFSUNLOCKREQ();
 751         }
 752
 753         /*
 754          * If there was a successful reply and a tprintf msg.
 755          * tprintf a response.
 756          */
 757         if (stat == RPC_SUCCESS) {
 758                 error = 0;
 759         } else if (stat == RPC_TIMEDOUT) {
 760                 NFSINCRGLOBAL(newnfsstats.rpctimeouts);
 761                 error = ETIMEDOUT;
 762         } else if (stat == RPC_VERSMISMATCH) {
 763                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 764                 error = EOPNOTSUPP;
 765         } else if (stat == RPC_PROGVERSMISMATCH) {
 766                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 767                 error = EPROTONOSUPPORT;
 768         } else if (stat == RPC_INTR) {
 769                 error = EINTR;
 770         } else {
 771                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 772                 error = EACCES;
 773         }
 774         if (error) {
 775                 m_freem(nd->nd_mreq);
 776                 if (usegssname == 0)
 777                         AUTH_DESTROY(auth);
 778                 if (rep != NULL)
 779                         FREE((caddr_t)rep, M_NFSDREQ);
 780                 if (set_sigset)
 781                         newnfs_restore_sigmask(td, &oldset);
 782                 return (error);
 783         }
 784
 785         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 786
 787         /*
 788          * Search for any mbufs that are not a multiple of 4 bytes long
 789          * or with m_data not longword aligned.
 790          * These could cause pointer alignment problems, so copy them to
 791          * well aligned mbufs.
 792          */
 793         newnfs_realign(&nd->nd_mrep, M_WAITOK);
 794         nd->nd_md = nd->nd_mrep;
 795         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 796         nd->nd_repstat = 0;
 797         if (nd->nd_procnum != NFSPROC_NULL) {
 798                 /* If sep == NULL, set it to the default in nmp. */
 799                 if (sep == NULL && nmp != NULL)
 800                         sep = NFSMNT_MDSSESSION(nmp);
 801                 /*
 802                  * and now the actual NFS xdr.
 803                  */
 804                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 805                 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 806                 if (nd->nd_repstat >= 10000)
 807                         NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
 808                             (int)nd->nd_repstat);
 809
 810                 /*
 811                  * Get rid of the tag, return count and SEQUENCE result for
 812                  * NFSv4.
 813                  */
 814                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 815                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 816                         i = fxdr_unsigned(int, *tl);
 817                         error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
 818                         if (error)
 819                                 goto nfsmout;
 820                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 821                         opcnt = fxdr_unsigned(int, *tl++);
 822                         i = fxdr_unsigned(int, *tl++);
 823                         j = fxdr_unsigned(int, *tl);
 824                         if (j >= 10000)
 825                                 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
 826                         /*
 827                          * If the first op is Sequence, free up the slot.
 828                          */
 829                         if (nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0)
 830                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 831                         if (nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) {
 832                                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
 833                                     5 * NFSX_UNSIGNED);
 834                                 mtx_lock(&sep->nfsess_mtx);
 835                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 836                                 retseq = fxdr_unsigned(uint32_t, *tl++);
 837                                 slot = fxdr_unsigned(int, *tl++);
 838                                 freeslot = slot;
 839                                 if (retseq != sep->nfsess_slotseq[slot])
 840                                         printf("retseq diff 0x%x\n", retseq);
 841                                 retval = fxdr_unsigned(uint32_t, *++tl);
 842                                 if ((retval + 1) < sep->nfsess_foreslots)
 843                                         sep->nfsess_foreslots = (retval + 1);
 844                                 else if ((retval + 1) > sep->nfsess_foreslots)
 845                                         sep->nfsess_foreslots = (retval < 64) ?
 846                                             (retval + 1) : 64;
 847                                 mtx_unlock(&sep->nfsess_mtx);
 848
 849                                 /* Grab the op and status for the next one. */
 850                                 if (opcnt > 1) {
 851                                         NFSM_DISSECT(tl, uint32_t *,
 852                                             2 * NFSX_UNSIGNED);
 853                                         i = fxdr_unsigned(int, *tl++);
 854                                         j = fxdr_unsigned(int, *tl);
 855                                 }
 856                         }
 857                 }
 858                 if (nd->nd_repstat != 0) {
 859                         if (((nd->nd_repstat == NFSERR_DELAY ||
 860                               nd->nd_repstat == NFSERR_GRACE) &&
 861                              (nd->nd_flag & ND_NFSV4) &&
 862                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 863                              nd->nd_procnum != NFSPROC_SETATTR &&
 864                              nd->nd_procnum != NFSPROC_READ &&
 865                              nd->nd_procnum != NFSPROC_READDS &&
 866                              nd->nd_procnum != NFSPROC_WRITE &&
 867                              nd->nd_procnum != NFSPROC_WRITEDS &&
 868                              nd->nd_procnum != NFSPROC_OPEN &&
 869                              nd->nd_procnum != NFSPROC_CREATE &&
 870                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 871                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 872                              nd->nd_procnum != NFSPROC_CLOSE &&
 873                              nd->nd_procnum != NFSPROC_LOCK &&
 874                              nd->nd_procnum != NFSPROC_LOCKU) ||
 875                             (nd->nd_repstat == NFSERR_DELAY &&
 876                              (nd->nd_flag & ND_NFSV4) == 0) ||
 877                             nd->nd_repstat == NFSERR_RESOURCE) {
 878                                 if (trylater_delay > NFS_TRYLATERDEL)
 879                                         trylater_delay = NFS_TRYLATERDEL;
 880                                 waituntil = NFSD_MONOSEC + trylater_delay;
 881                                 while (NFSD_MONOSEC < waituntil)
 882                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 883                                 trylater_delay *= 2;
 884                                 if (slot != -1) {
 885                                         mtx_lock(&sep->nfsess_mtx);
 886                                         sep->nfsess_slotseq[slot]++;
 887                                         *nd->nd_slotseq = txdr_unsigned(
 888                                             sep->nfsess_slotseq[slot]);
 889                                         mtx_unlock(&sep->nfsess_mtx);
 890                                 }
 891                                 m_freem(nd->nd_mrep);
 892                                 nd->nd_mrep = NULL;
 893                                 goto tryagain;
 894                         }
 895
 896                         /*
 897                          * If the File Handle was stale, invalidate the
 898                          * lookup cache, just in case.
 899                          * (vp != NULL implies a client side call)
 900                          */
 901                         if (nd->nd_repstat == ESTALE && vp != NULL) {
 902                                 cache_purge(vp);
 903                                 if (ncl_call_invalcaches != NULL)
 904                                         (*ncl_call_invalcaches)(vp);
 905                         }
 906                 }
 907                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 908                         /* Free the slot, as required. */
 909                         if (freeslot != -1)
 910                                 nfsv4_freeslot(sep, freeslot);
 911                         /*
 912                          * If this op is Putfh, throw its results away.
 913                          */
 914                         if (j >= 10000)
 915                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
 916                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
 917                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
 918                                 i = fxdr_unsigned(int, *tl++);
 919                                 j = fxdr_unsigned(int, *tl);
 920                                 if (j >= 10000)
 921                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
 922                                             j);
 923                                 /*
 924                                  * All Compounds that do an Op that must
 925                                  * be in sequence consist of NFSV4OP_PUTFH
 926                                  * followed by one of these. As such, we
 927                                  * can determine if the seqid# should be
 928                                  * incremented, here.
 929                                  */
 930                                 if ((i == NFSV4OP_OPEN ||
 931                                      i == NFSV4OP_OPENCONFIRM ||
 932                                      i == NFSV4OP_OPENDOWNGRADE ||
 933                                      i == NFSV4OP_CLOSE ||
 934                                      i == NFSV4OP_LOCK ||
 935                                      i == NFSV4OP_LOCKU) &&
 936                                     (j == 0 ||
 937                                      (j != NFSERR_STALECLIENTID &&
 938                                       j != NFSERR_STALESTATEID &&
 939                                       j != NFSERR_BADSTATEID &&
 940                                       j != NFSERR_BADSEQID &&
 941                                       j != NFSERR_BADXDR &&
 942                                       j != NFSERR_RESOURCE &&
 943                                       j != NFSERR_NOFILEHANDLE)))
 944                                         nd->nd_flag |= ND_INCRSEQID;
 945                         }
 946                         /*
 947                          * If this op's status is non-zero, mark
 948                          * that there is no more data to process.
 949                          */
 950                         if (j)
 951                                 nd->nd_flag |= ND_NOMOREDATA;
 952
 953                         /*
 954                          * If R_DONTRECOVER is set, replace the stale error
 955                          * reply, so that recovery isn't initiated.
 956                          */
 957                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
 958                              nd->nd_repstat == NFSERR_BADSESSION ||
 959                              nd->nd_repstat == NFSERR_STALESTATEID) &&
 960                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
 961                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
 962                 }
 963         }
 964
 965 #ifdef KDTRACE_HOOKS
 966         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
 967                 uint32_t probe_id;
 968                 int probe_procnum;
 969
 970                 if (nd->nd_flag & ND_NFSV4) {
 971                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
 972                         probe_procnum = nd->nd_procnum;
 973                 } else if (nd->nd_flag & ND_NFSV3) {
 974                         probe_id = nfscl_nfs3_done_probes[procnum];
 975                         probe_procnum = procnum;
 976                 } else {
 977                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
 978                         probe_procnum = procnum;
 979                 }
 980                 if (probe_id != 0)
 981                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
 982                             nd->nd_mreq, cred, probe_procnum, 0);
 983         }
 984 #endif
 985
 986         m_freem(nd->nd_mreq);
 987         if (usegssname == 0)
 988                 AUTH_DESTROY(auth);
 989         if (rep != NULL)
 990                 FREE((caddr_t)rep, M_NFSDREQ);
 991         if (set_sigset)
 992                 newnfs_restore_sigmask(td, &oldset);
 993         return (0);
 994 nfsmout:
 995         mbuf_freem(nd->nd_mrep);
 996         mbuf_freem(nd->nd_mreq);
 997         if (usegssname == 0)
 998                 AUTH_DESTROY(auth);
 999         if (rep != NULL)
1000                 FREE((caddr_t)rep, M_NFSDREQ);
1001         if (set_sigset)
1002                 newnfs_restore_sigmask(td, &oldset);
1003         return (error);
1004 }
1005
1006 /*
1007  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1008  * wait for all requests to complete. This is used by forced unmounts
1009  * to terminate any outstanding RPCs.
1010  */
1011 int
1012 newnfs_nmcancelreqs(struct nfsmount *nmp)
1013 {
1014
1015         if (nmp->nm_sockreq.nr_client != NULL)
1016                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1017         return (0);
1018 }
1019
1020 /*
1021  * Any signal that can interrupt an NFS operation in an intr mount
1022  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1023  */
1024 int newnfs_sig_set[] = {
1025         SIGINT,
1026         SIGTERM,
1027         SIGHUP,
1028         SIGKILL,
1029         SIGQUIT
1030 };
1031
1032 /*
1033  * Check to see if one of the signals in our subset is pending on
1034  * the process (in an intr mount).
1035  */
1036 static int
1037 nfs_sig_pending(sigset_t set)
1038 {
1039         int i;
1040
1041         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
1042                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1043                         return (1);
1044         return (0);
1045 }
1046
1047 /*
1048  * The set/restore sigmask functions are used to (temporarily) overwrite
1049  * the thread td_sigmask during an RPC call (for example). These are also
1050  * used in other places in the NFS client that might tsleep().
1051  */
1052 void
1053 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1054 {
1055         sigset_t newset;
1056         int i;
1057         struct proc *p;
1058
1059         SIGFILLSET(newset);
1060         if (td == NULL)
1061                 td = curthread; /* XXX */
1062         p = td->td_proc;
1063         /* Remove the NFS set of signals from newset */
1064         PROC_LOCK(p);
1065         mtx_lock(&p->p_sigacts->ps_mtx);
1066         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
1067                 /*
1068                  * But make sure we leave the ones already masked
1069                  * by the process, ie. remove the signal from the
1070                  * temporary signalmask only if it wasn't already
1071                  * in p_sigmask.
1072                  */
1073                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1074                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1075                         SIGDELSET(newset, newnfs_sig_set[i]);
1076         }
1077         mtx_unlock(&p->p_sigacts->ps_mtx);
1078         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1079             SIGPROCMASK_PROC_LOCKED);
1080         PROC_UNLOCK(p);
1081 }
1082
1083 void
1084 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1085 {
1086         if (td == NULL)
1087                 td = curthread; /* XXX */
1088         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1089 }
1090
1091 /*
1092  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1093  * old one after msleep() returns.
1094  */
1095 int
1096 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1097 {
1098         sigset_t oldset;
1099         int error;
1100         struct proc *p;
1101
1102         if ((priority & PCATCH) == 0)
1103                 return msleep(ident, mtx, priority, wmesg, timo);
1104         if (td == NULL)
1105                 td = curthread; /* XXX */
1106         newnfs_set_sigmask(td, &oldset);
1107         error = msleep(ident, mtx, priority, wmesg, timo);
1108         newnfs_restore_sigmask(td, &oldset);
1109         p = td->td_proc;
1110         return (error);
1111 }
1112
1113 /*
1114  * Test for a termination condition pending on the process.
1115  * This is used for NFSMNT_INT mounts.
1116  */
1117 int
1118 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1119 {
1120         struct proc *p;
1121         sigset_t tmpset;
1122
1123         /* Terminate all requests while attempting a forced unmount. */
1124         if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1125                 return (EIO);
1126         if (!(nmp->nm_flag & NFSMNT_INT))
1127                 return (0);
1128         if (td == NULL)
1129                 return (0);
1130         p = td->td_proc;
1131         PROC_LOCK(p);
1132         tmpset = p->p_siglist;
1133         SIGSETOR(tmpset, td->td_siglist);
1134         SIGSETNAND(tmpset, td->td_sigmask);
1135         mtx_lock(&p->p_sigacts->ps_mtx);
1136         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1137         mtx_unlock(&p->p_sigacts->ps_mtx);
1138         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1139             && nfs_sig_pending(tmpset)) {
1140                 PROC_UNLOCK(p);
1141                 return (EINTR);
1142         }
1143         PROC_UNLOCK(p);
1144         return (0);
1145 }
1146
1147 static int
1148 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1149 {
1150         struct proc *p;
1151
1152         p = td ? td->td_proc : NULL;
1153         if (error) {
1154                 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
1155                     server, msg, error);
1156         } else {
1157                 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
1158         }
1159         return (0);
1160 }
1161
1162 static void
1163 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1164     int error, int flags)
1165 {
1166         if (nmp == NULL)
1167                 return;
1168         mtx_lock(&nmp->nm_mtx);
1169         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1170                 nmp->nm_state |= NFSSTA_TIMEO;
1171                 mtx_unlock(&nmp->nm_mtx);
1172                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1173                     VQ_NOTRESP, 0);
1174         } else
1175                 mtx_unlock(&nmp->nm_mtx);
1176         mtx_lock(&nmp->nm_mtx);
1177         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1178                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1179                 mtx_unlock(&nmp->nm_mtx);
1180                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1181                     VQ_NOTRESPLOCK, 0);
1182         } else
1183                 mtx_unlock(&nmp->nm_mtx);
1184         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1185 }
1186
1187 static void
1188 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1189     int flags, int tprintfmsg)
1190 {
1191         if (nmp == NULL)
1192                 return;
1193         if (tprintfmsg) {
1194                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1195         }
1196
1197         mtx_lock(&nmp->nm_mtx);
1198         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1199                 nmp->nm_state &= ~NFSSTA_TIMEO;
1200                 mtx_unlock(&nmp->nm_mtx);
1201                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1202                     VQ_NOTRESP, 1);
1203         } else
1204                 mtx_unlock(&nmp->nm_mtx);
1205
1206         mtx_lock(&nmp->nm_mtx);
1207         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1208                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1209                 mtx_unlock(&nmp->nm_mtx);
1210                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1211                     VQ_NOTRESPLOCK, 1);
1212         } else
1213                 mtx_unlock(&nmp->nm_mtx);
1214 }
1215