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  * 3. 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_kgssapi.h"
  42 #include "opt_nfs.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/limits.h>
  48 #include <sys/lock.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mbuf.h>
  51 #include <sys/mount.h>
  52 #include <sys/mutex.h>
  53 #include <sys/proc.h>
  54 #include <sys/signalvar.h>
  55 #include <sys/syscallsubr.h>
  56 #include <sys/sysctl.h>
  57 #include <sys/syslog.h>
  58 #include <sys/vnode.h>
  59
  60 #include <rpc/rpc.h>
  61 #include <rpc/krpc.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 NFSCLSTATEMUTEX;
  93 extern struct nfsstatsv1 nfsstatsv1;
  94 extern struct nfsreqhead nfsd_reqq;
  95 extern int nfscl_ticks;
  96 extern void (*ncl_call_invalcaches)(struct vnode *);
  97 extern int nfs_numnfscbd;
  98 extern int nfscl_debuglevel;
  99
 100 SVCPOOL         *nfscbd_pool;
 101 static int      nfsrv_gsscallbackson = 0;
 102 static int      nfs_bufpackets = 4;
 103 static int      nfs_reconnects;
 104 static int      nfs3_jukebox_delay = 10;
 105 static int      nfs_skip_wcc_data_onerr = 1;
 106
 107 SYSCTL_DECL(_vfs_nfs);
 108
 109 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
 110     "Buffer reservation size 2 < x < 64");
 111 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
 112     "Number of times the nfs client has had to reconnect");
 113 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
 114     "Number of seconds to delay a retry after receiving EJUKEBOX");
 115 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
 116     "Disable weak cache consistency checking when server returns an error");
 117
 118 static void     nfs_down(struct nfsmount *, struct thread *, const char *,
 119     int, int);
 120 static void     nfs_up(struct nfsmount *, struct thread *, const char *,
 121     int, int);
 122 static int      nfs_msg(struct thread *, const char *, const char *, int);
 123
 124 struct nfs_cached_auth {
 125         int             ca_refs; /* refcount, including 1 from the cache */
 126         uid_t           ca_uid;  /* uid that corresponds to this auth */
 127         AUTH            *ca_auth; /* RPC auth handle */
 128 };
 129
 130 static int nfsv2_procid[NFS_V3NPROCS] = {
 131         NFSV2PROC_NULL,
 132         NFSV2PROC_GETATTR,
 133         NFSV2PROC_SETATTR,
 134         NFSV2PROC_LOOKUP,
 135         NFSV2PROC_NOOP,
 136         NFSV2PROC_READLINK,
 137         NFSV2PROC_READ,
 138         NFSV2PROC_WRITE,
 139         NFSV2PROC_CREATE,
 140         NFSV2PROC_MKDIR,
 141         NFSV2PROC_SYMLINK,
 142         NFSV2PROC_CREATE,
 143         NFSV2PROC_REMOVE,
 144         NFSV2PROC_RMDIR,
 145         NFSV2PROC_RENAME,
 146         NFSV2PROC_LINK,
 147         NFSV2PROC_READDIR,
 148         NFSV2PROC_NOOP,
 149         NFSV2PROC_STATFS,
 150         NFSV2PROC_NOOP,
 151         NFSV2PROC_NOOP,
 152         NFSV2PROC_NOOP,
 153 };
 154
 155 /*
 156  * Initialize sockets and congestion for a new NFS connection.
 157  * We do not free the sockaddr if error.
 158  */
 159 int
 160 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
 161     struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
 162 {
 163         int rcvreserve, sndreserve;
 164         int pktscale, pktscalesav;
 165         struct sockaddr *saddr;
 166         struct ucred *origcred;
 167         CLIENT *client;
 168         struct netconfig *nconf;
 169         struct socket *so;
 170         int one = 1, retries, error = 0;
 171         struct thread *td = curthread;
 172         SVCXPRT *xprt;
 173         struct timeval timo;
 174
 175         /*
 176          * We need to establish the socket using the credentials of
 177          * the mountpoint.  Some parts of this process (such as
 178          * sobind() and soconnect()) will use the curent thread's
 179          * credential instead of the socket credential.  To work
 180          * around this, temporarily change the current thread's
 181          * credential to that of the mountpoint.
 182          *
 183          * XXX: It would be better to explicitly pass the correct
 184          * credential to sobind() and soconnect().
 185          */
 186         origcred = td->td_ucred;
 187
 188         /*
 189          * Use the credential in nr_cred, if not NULL.
 190          */
 191         if (nrp->nr_cred != NULL)
 192                 td->td_ucred = nrp->nr_cred;
 193         else
 194                 td->td_ucred = cred;
 195         saddr = nrp->nr_nam;
 196
 197         if (saddr->sa_family == AF_INET)
 198                 if (nrp->nr_sotype == SOCK_DGRAM)
 199                         nconf = getnetconfigent("udp");
 200                 else
 201                         nconf = getnetconfigent("tcp");
 202         else if (saddr->sa_family == AF_LOCAL)
 203                 nconf = getnetconfigent("local");
 204         else
 205                 if (nrp->nr_sotype == SOCK_DGRAM)
 206                         nconf = getnetconfigent("udp6");
 207                 else
 208                         nconf = getnetconfigent("tcp6");
 209
 210         pktscale = nfs_bufpackets;
 211         if (pktscale < 2)
 212                 pktscale = 2;
 213         if (pktscale > 64)
 214                 pktscale = 64;
 215         pktscalesav = pktscale;
 216         /*
 217          * soreserve() can fail if sb_max is too small, so shrink pktscale
 218          * and try again if there is an error.
 219          * Print a log message suggesting increasing sb_max.
 220          * Creating a socket and doing this is necessary since, if the
 221          * reservation sizes are too large and will make soreserve() fail,
 222          * the connection will work until a large send is attempted and
 223          * then it will loop in the krpc code.
 224          */
 225         so = NULL;
 226         saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
 227         error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
 228             nrp->nr_soproto, td->td_ucred, td);
 229         if (error) {
 230                 td->td_ucred = origcred;
 231                 goto out;
 232         }
 233         do {
 234             if (error != 0 && pktscale > 2) {
 235                 if (nmp != NULL && nrp->nr_sotype == SOCK_STREAM &&
 236                     pktscale == pktscalesav)
 237                     printf("Consider increasing kern.ipc.maxsockbuf\n");
 238                 pktscale--;
 239             }
 240             if (nrp->nr_sotype == SOCK_DGRAM) {
 241                 if (nmp != NULL) {
 242                         sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 243                             pktscale;
 244                         rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 245                             pktscale;
 246                 } else {
 247                         sndreserve = rcvreserve = 1024 * pktscale;
 248                 }
 249             } else {
 250                 if (nrp->nr_sotype != SOCK_STREAM)
 251                         panic("nfscon sotype");
 252                 if (nmp != NULL) {
 253                         sndreserve = (NFS_MAXBSIZE + NFS_MAXXDR +
 254                             sizeof (u_int32_t)) * pktscale;
 255                         rcvreserve = (NFS_MAXBSIZE + NFS_MAXXDR +
 256                             sizeof (u_int32_t)) * pktscale;
 257                 } else {
 258                         sndreserve = rcvreserve = 1024 * pktscale;
 259                 }
 260             }
 261             error = soreserve(so, sndreserve, rcvreserve);
 262             if (error != 0 && nmp != NULL && nrp->nr_sotype == SOCK_STREAM &&
 263                 pktscale <= 2)
 264                 printf("Must increase kern.ipc.maxsockbuf or reduce"
 265                     " rsize, wsize\n");
 266         } while (error != 0 && pktscale > 2);
 267         soclose(so);
 268         if (error) {
 269                 td->td_ucred = origcred;
 270                 goto out;
 271         }
 272
 273         client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
 274             nrp->nr_vers, sndreserve, rcvreserve);
 275         CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq");
 276         if (nmp != NULL) {
 277                 if ((nmp->nm_flag & NFSMNT_INT))
 278                         CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
 279                 if ((nmp->nm_flag & NFSMNT_RESVPORT))
 280                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 281                 if (NFSHASSOFT(nmp)) {
 282                         if (nmp->nm_sotype == SOCK_DGRAM)
 283                                 /*
 284                                  * For UDP, the large timeout for a reconnect
 285                                  * will be set to "nm_retry * nm_timeo / 2", so
 286                                  * we only want to do 2 reconnect timeout
 287                                  * retries.
 288                                  */
 289                                 retries = 2;
 290                         else
 291                                 retries = nmp->nm_retry;
 292                 } else
 293                         retries = INT_MAX;
 294                 /* cred == NULL for DS connects. */
 295                 if (NFSHASNFSV4N(nmp) && cred != NULL) {
 296                         /*
 297                          * Make sure the nfscbd_pool doesn't get destroyed
 298                          * while doing this.
 299                          */
 300                         NFSD_LOCK();
 301                         if (nfs_numnfscbd > 0) {
 302                                 nfs_numnfscbd++;
 303                                 NFSD_UNLOCK();
 304                                 xprt = svc_vc_create_backchannel(nfscbd_pool);
 305                                 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
 306                                 NFSD_LOCK();
 307                                 nfs_numnfscbd--;
 308                                 if (nfs_numnfscbd == 0)
 309                                         wakeup(&nfs_numnfscbd);
 310                         }
 311                         NFSD_UNLOCK();
 312                 }
 313         } else {
 314                 /*
 315                  * Three cases:
 316                  * - Null RPC callback to client
 317                  * - Non-Null RPC callback to client, wait a little longer
 318                  * - upcalls to nfsuserd and gssd (clp == NULL)
 319                  */
 320                 if (callback_retry_mult == 0) {
 321                         retries = NFSV4_UPCALLRETRY;
 322                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 323                 } else {
 324                         retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
 325                 }
 326         }
 327         CLNT_CONTROL(client, CLSET_RETRIES, &retries);
 328
 329         if (nmp != NULL) {
 330                 /*
 331                  * For UDP, there are 2 timeouts:
 332                  * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
 333                  *   that does a retransmit of an RPC request using the same
 334                  *   socket and xid. This is what you normally want to do,
 335                  *   since NFS servers depend on "same xid" for their
 336                  *   Duplicate Request Cache.
 337                  * - timeout specified in CLNT_CALL_MBUF(), which specifies when
 338                  *   retransmits on the same socket should fail and a fresh
 339                  *   socket created. Each of these timeouts counts as one
 340                  *   CLSET_RETRIES as set above.
 341                  * Set the initial retransmit timeout for UDP. This timeout
 342                  * doesn't exist for TCP and the following call just fails,
 343                  * which is ok.
 344                  */
 345                 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
 346                 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
 347                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
 348         }
 349
 350         mtx_lock(&nrp->nr_mtx);
 351         if (nrp->nr_client != NULL) {
 352                 mtx_unlock(&nrp->nr_mtx);
 353                 /*
 354                  * Someone else already connected.
 355                  */
 356                 CLNT_RELEASE(client);
 357         } else {
 358                 nrp->nr_client = client;
 359                 /*
 360                  * Protocols that do not require connections may be optionally
 361                  * left unconnected for servers that reply from a port other
 362                  * than NFS_PORT.
 363                  */
 364                 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
 365                         mtx_unlock(&nrp->nr_mtx);
 366                         CLNT_CONTROL(client, CLSET_CONNECT, &one);
 367                 } else
 368                         mtx_unlock(&nrp->nr_mtx);
 369         }
 370
 371
 372         /* Restore current thread's credentials. */
 373         td->td_ucred = origcred;
 374
 375 out:
 376         NFSEXITCODE(error);
 377         return (error);
 378 }
 379
 380 /*
 381  * NFS disconnect. Clean up and unlink.
 382  */
 383 void
 384 newnfs_disconnect(struct nfssockreq *nrp)
 385 {
 386         CLIENT *client;
 387
 388         mtx_lock(&nrp->nr_mtx);
 389         if (nrp->nr_client != NULL) {
 390                 client = nrp->nr_client;
 391                 nrp->nr_client = NULL;
 392                 mtx_unlock(&nrp->nr_mtx);
 393                 rpc_gss_secpurge_call(client);
 394                 CLNT_CLOSE(client);
 395                 CLNT_RELEASE(client);
 396         } else {
 397                 mtx_unlock(&nrp->nr_mtx);
 398         }
 399 }
 400
 401 static AUTH *
 402 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
 403     char *srv_principal, gss_OID mech_oid, struct ucred *cred)
 404 {
 405         rpc_gss_service_t svc;
 406         AUTH *auth;
 407
 408         switch (secflavour) {
 409         case RPCSEC_GSS_KRB5:
 410         case RPCSEC_GSS_KRB5I:
 411         case RPCSEC_GSS_KRB5P:
 412                 if (!mech_oid) {
 413                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 414                                 return (NULL);
 415                 }
 416                 if (secflavour == RPCSEC_GSS_KRB5)
 417                         svc = rpc_gss_svc_none;
 418                 else if (secflavour == RPCSEC_GSS_KRB5I)
 419                         svc = rpc_gss_svc_integrity;
 420                 else
 421                         svc = rpc_gss_svc_privacy;
 422
 423                 if (clnt_principal == NULL)
 424                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 425                             srv_principal, mech_oid, svc);
 426                 else {
 427                         auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
 428                             clnt_principal, srv_principal, "kerberosv5",
 429                             svc, NULL, NULL, NULL);
 430                         return (auth);
 431                 }
 432                 if (auth != NULL)
 433                         return (auth);
 434                 /* fallthrough */
 435         case AUTH_SYS:
 436         default:
 437                 return (authunix_create(cred));
 438
 439         }
 440 }
 441
 442 /*
 443  * Callback from the RPC code to generate up/down notifications.
 444  */
 445
 446 struct nfs_feedback_arg {
 447         struct nfsmount *nf_mount;
 448         int             nf_lastmsg;     /* last tprintf */
 449         int             nf_tprintfmsg;
 450         struct thread   *nf_td;
 451 };
 452
 453 static void
 454 nfs_feedback(int type, int proc, void *arg)
 455 {
 456         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 457         struct nfsmount *nmp = nf->nf_mount;
 458         time_t now;
 459
 460         switch (type) {
 461         case FEEDBACK_REXMIT2:
 462         case FEEDBACK_RECONNECT:
 463                 now = NFSD_MONOSEC;
 464                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 465                         nfs_down(nmp, nf->nf_td,
 466                             "not responding", 0, NFSSTA_TIMEO);
 467                         nf->nf_tprintfmsg = TRUE;
 468                         nf->nf_lastmsg = now;
 469                 }
 470                 break;
 471
 472         case FEEDBACK_OK:
 473                 nfs_up(nf->nf_mount, nf->nf_td,
 474                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 475                 break;
 476         }
 477 }
 478
 479 /*
 480  * newnfs_request - goes something like this
 481  *      - does the rpc by calling the krpc layer
 482  *      - break down rpc header and return with nfs reply
 483  * nb: always frees up nd_mreq mbuf list
 484  */
 485 int
 486 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 487     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 488     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 489     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep)
 490 {
 491         uint32_t retseq, retval, slotseq, *tl;
 492         time_t waituntil;
 493         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 494         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 495         int freeslot, maxslot, reterr, slotpos, timeo;
 496         u_int16_t procnum;
 497         u_int trylater_delay = 1;
 498         struct nfs_feedback_arg nf;
 499         struct timeval timo;
 500         AUTH *auth;
 501         struct rpc_callextra ext;
 502         enum clnt_stat stat;
 503         struct nfsreq *rep = NULL;
 504         char *srv_principal = NULL, *clnt_principal = NULL;
 505         sigset_t oldset;
 506         struct ucred *authcred;
 507         struct nfsclsession *sep;
 508         uint8_t sessionid[NFSX_V4SESSIONID];
 509
 510         sep = dssep;
 511         if (xidp != NULL)
 512                 *xidp = 0;
 513         /* Reject requests while attempting a forced unmount. */
 514         if (nmp != NULL && NFSCL_FORCEDISM(nmp->nm_mountp)) {
 515                 m_freem(nd->nd_mreq);
 516                 return (ESTALE);
 517         }
 518
 519         /*
 520          * Set authcred, which is used to acquire RPC credentials to
 521          * the cred argument, by default. The crhold() should not be
 522          * necessary, but will ensure that some future code change
 523          * doesn't result in the credential being free'd prematurely.
 524          */
 525         authcred = crhold(cred);
 526
 527         /* For client side interruptible mounts, mask off the signals. */
 528         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 529                 newnfs_set_sigmask(td, &oldset);
 530                 set_sigset = 1;
 531         }
 532
 533         /*
 534          * XXX if not already connected call nfs_connect now. Longer
 535          * term, change nfs_mount to call nfs_connect unconditionally
 536          * and let clnt_reconnect_create handle reconnects.
 537          */
 538         if (nrp->nr_client == NULL)
 539                 newnfs_connect(nmp, nrp, cred, td, 0);
 540
 541         /*
 542          * For a client side mount, nmp is != NULL and clp == NULL. For
 543          * server calls (callbacks or upcalls), nmp == NULL.
 544          */
 545         if (clp != NULL) {
 546                 NFSLOCKSTATE();
 547                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 548                         secflavour = RPCSEC_GSS_KRB5;
 549                         if (nd->nd_procnum != NFSPROC_NULL) {
 550                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 551                                         secflavour = RPCSEC_GSS_KRB5I;
 552                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 553                                         secflavour = RPCSEC_GSS_KRB5P;
 554                         }
 555                 }
 556                 NFSUNLOCKSTATE();
 557         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 558              nd->nd_procnum != NFSPROC_NULL) {
 559                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 560                         nd->nd_flag |= ND_USEGSSNAME;
 561                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 562                         /*
 563                          * If there is a client side host based credential,
 564                          * use that, otherwise use the system uid, if set.
 565                          * The system uid is in the nmp->nm_sockreq.nr_cred
 566                          * credentials.
 567                          */
 568                         if (nmp->nm_krbnamelen > 0) {
 569                                 usegssname = 1;
 570                                 clnt_principal = nmp->nm_krbname;
 571                         } else if (nmp->nm_uid != (uid_t)-1) {
 572                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 573                                     ("newnfs_request: NULL nr_cred"));
 574                                 crfree(authcred);
 575                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 576                         }
 577                 } else if (nmp->nm_krbnamelen == 0 &&
 578                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 579                         /*
 580                          * If there is no host based principal name and
 581                          * the system uid is set and this is root, use the
 582                          * system uid, since root won't have user
 583                          * credentials in a credentials cache file.
 584                          * The system uid is in the nmp->nm_sockreq.nr_cred
 585                          * credentials.
 586                          */
 587                         KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 588                             ("newnfs_request: NULL nr_cred"));
 589                         crfree(authcred);
 590                         authcred = crhold(nmp->nm_sockreq.nr_cred);
 591                 }
 592                 if (NFSHASINTEGRITY(nmp))
 593                         secflavour = RPCSEC_GSS_KRB5I;
 594                 else if (NFSHASPRIVACY(nmp))
 595                         secflavour = RPCSEC_GSS_KRB5P;
 596                 else
 597                         secflavour = RPCSEC_GSS_KRB5;
 598                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 599         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 600             nd->nd_procnum != NFSPROC_NULL &&
 601             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 602                 /*
 603                  * Use the uid that did the mount when the RPC is doing
 604                  * NFSv4 system operations, as indicated by the
 605                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 606                  * The credentials in nm_sockreq.nr_cred were used for the
 607                  * mount.
 608                  */
 609                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 610                     ("newnfs_request: NULL nr_cred"));
 611                 crfree(authcred);
 612                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 613         }
 614
 615         if (nmp != NULL) {
 616                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 617                 nf.nf_mount = nmp;
 618                 nf.nf_td = td;
 619                 nf.nf_lastmsg = NFSD_MONOSEC -
 620                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 621         }
 622
 623         if (nd->nd_procnum == NFSPROC_NULL)
 624                 auth = authnone_create();
 625         else if (usegssname) {
 626                 /*
 627                  * For this case, the authenticator is held in the
 628                  * nfssockreq structure, so don't release the reference count
 629                  * held on it. --> Don't AUTH_DESTROY() it in this function.
 630                  */
 631                 if (nrp->nr_auth == NULL)
 632                         nrp->nr_auth = nfs_getauth(nrp, secflavour,
 633                             clnt_principal, srv_principal, NULL, authcred);
 634                 else
 635                         rpc_gss_refresh_auth_call(nrp->nr_auth);
 636                 auth = nrp->nr_auth;
 637         } else
 638                 auth = nfs_getauth(nrp, secflavour, NULL,
 639                     srv_principal, NULL, authcred);
 640         crfree(authcred);
 641         if (auth == NULL) {
 642                 m_freem(nd->nd_mreq);
 643                 if (set_sigset)
 644                         newnfs_restore_sigmask(td, &oldset);
 645                 return (EACCES);
 646         }
 647         bzero(&ext, sizeof(ext));
 648         ext.rc_auth = auth;
 649         if (nmp != NULL) {
 650                 ext.rc_feedback = nfs_feedback;
 651                 ext.rc_feedback_arg = &nf;
 652         }
 653
 654         procnum = nd->nd_procnum;
 655         if ((nd->nd_flag & ND_NFSV4) &&
 656             nd->nd_procnum != NFSPROC_NULL &&
 657             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 658                 procnum = NFSV4PROC_COMPOUND;
 659
 660         if (nmp != NULL) {
 661                 NFSINCRGLOBAL(nfsstatsv1.rpcrequests);
 662
 663                 /* Map the procnum to the old NFSv2 one, as required. */
 664                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 665                         if (nd->nd_procnum < NFS_V3NPROCS)
 666                                 procnum = nfsv2_procid[nd->nd_procnum];
 667                         else
 668                                 procnum = NFSV2PROC_NOOP;
 669                 }
 670
 671                 /*
 672                  * Now only used for the R_DONTRECOVER case, but until that is
 673                  * supported within the krpc code, I need to keep a queue of
 674                  * outstanding RPCs for nfsv4 client requests.
 675                  */
 676                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 677                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 678                             M_NFSDREQ, M_WAITOK);
 679 #ifdef KDTRACE_HOOKS
 680                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 681                         uint32_t probe_id;
 682                         int probe_procnum;
 683
 684                         if (nd->nd_flag & ND_NFSV4) {
 685                                 probe_id =
 686                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 687                                 probe_procnum = nd->nd_procnum;
 688                         } else if (nd->nd_flag & ND_NFSV3) {
 689                                 probe_id = nfscl_nfs3_start_probes[procnum];
 690                                 probe_procnum = procnum;
 691                         } else {
 692                                 probe_id =
 693                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 694                                 probe_procnum = procnum;
 695                         }
 696                         if (probe_id != 0)
 697                                 (dtrace_nfscl_nfs234_start_probe)
 698                                     (probe_id, vp, nd->nd_mreq, cred,
 699                                      probe_procnum);
 700                 }
 701 #endif
 702         }
 703         trycnt = 0;
 704         freeslot = -1;          /* Set to slot that needs to be free'd */
 705 tryagain:
 706         slot = -1;              /* Slot that needs a sequence# increment. */
 707         /*
 708          * This timeout specifies when a new socket should be created,
 709          * along with new xid values. For UDP, this should be done
 710          * infrequently, since retransmits of RPC requests should normally
 711          * use the same xid.
 712          */
 713         if (nmp == NULL) {
 714                 timo.tv_usec = 0;
 715                 if (clp == NULL)
 716                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 717                 else
 718                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 719         } else {
 720                 if (nrp->nr_sotype != SOCK_DGRAM) {
 721                         timo.tv_usec = 0;
 722                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 723                                 timo.tv_sec = INT_MAX;
 724                         else
 725                                 timo.tv_sec = NFS_TCPTIMEO;
 726                 } else {
 727                         if (NFSHASSOFT(nmp)) {
 728                                 /*
 729                                  * CLSET_RETRIES is set to 2, so this should be
 730                                  * half of the total timeout required.
 731                                  */
 732                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 733                                 if (timeo < 1)
 734                                         timeo = 1;
 735                                 timo.tv_sec = timeo / NFS_HZ;
 736                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 737                                     NFS_HZ;
 738                         } else {
 739                                 /* For UDP hard mounts, use a large value. */
 740                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 741                                 timo.tv_usec = 0;
 742                         }
 743                 }
 744
 745                 if (rep != NULL) {
 746                         rep->r_flags = 0;
 747                         rep->r_nmp = nmp;
 748                         /*
 749                          * Chain request into list of outstanding requests.
 750                          */
 751                         NFSLOCKREQ();
 752                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 753                         NFSUNLOCKREQ();
 754                 }
 755         }
 756
 757         nd->nd_mrep = NULL;
 758         if (clp != NULL && sep != NULL)
 759                 stat = clnt_bck_call(nrp->nr_client, &ext, procnum,
 760                     nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt);
 761         else
 762                 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum,
 763                     nd->nd_mreq, &nd->nd_mrep, timo);
 764
 765         if (rep != NULL) {
 766                 /*
 767                  * RPC done, unlink the request.
 768                  */
 769                 NFSLOCKREQ();
 770                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 771                 NFSUNLOCKREQ();
 772         }
 773
 774         /*
 775          * If there was a successful reply and a tprintf msg.
 776          * tprintf a response.
 777          */
 778         if (stat == RPC_SUCCESS) {
 779                 error = 0;
 780         } else if (stat == RPC_TIMEDOUT) {
 781                 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts);
 782                 error = ETIMEDOUT;
 783         } else if (stat == RPC_VERSMISMATCH) {
 784                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 785                 error = EOPNOTSUPP;
 786         } else if (stat == RPC_PROGVERSMISMATCH) {
 787                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 788                 error = EPROTONOSUPPORT;
 789         } else if (stat == RPC_INTR) {
 790                 error = EINTR;
 791         } else {
 792                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 793                 error = EACCES;
 794         }
 795         if (error) {
 796                 m_freem(nd->nd_mreq);
 797                 if (usegssname == 0)
 798                         AUTH_DESTROY(auth);
 799                 if (rep != NULL)
 800                         FREE((caddr_t)rep, M_NFSDREQ);
 801                 if (set_sigset)
 802                         newnfs_restore_sigmask(td, &oldset);
 803                 return (error);
 804         }
 805
 806         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 807
 808         /*
 809          * Search for any mbufs that are not a multiple of 4 bytes long
 810          * or with m_data not longword aligned.
 811          * These could cause pointer alignment problems, so copy them to
 812          * well aligned mbufs.
 813          */
 814         newnfs_realign(&nd->nd_mrep, M_WAITOK);
 815         nd->nd_md = nd->nd_mrep;
 816         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 817         nd->nd_repstat = 0;
 818         if (nd->nd_procnum != NFSPROC_NULL &&
 819             nd->nd_procnum != NFSV4PROC_CBNULL) {
 820                 /* If sep == NULL, set it to the default in nmp. */
 821                 if (sep == NULL && nmp != NULL)
 822                         sep = nfsmnt_mdssession(nmp);
 823                 /*
 824                  * and now the actual NFS xdr.
 825                  */
 826                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 827                 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 828                 if (nd->nd_repstat >= 10000)
 829                         NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
 830                             (int)nd->nd_repstat);
 831
 832                 /*
 833                  * Get rid of the tag, return count and SEQUENCE result for
 834                  * NFSv4.
 835                  */
 836                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 837                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 838                         i = fxdr_unsigned(int, *tl);
 839                         error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
 840                         if (error)
 841                                 goto nfsmout;
 842                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 843                         opcnt = fxdr_unsigned(int, *tl++);
 844                         i = fxdr_unsigned(int, *tl++);
 845                         j = fxdr_unsigned(int, *tl);
 846                         if (j >= 10000)
 847                                 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
 848                         /*
 849                          * If the first op is Sequence, free up the slot.
 850                          */
 851                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) ||
 852                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0))
 853                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 854                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) ||
 855                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0)
 856                             ) {
 857                                 if (i == NFSV4OP_SEQUENCE)
 858                                         NFSM_DISSECT(tl, uint32_t *,
 859                                             NFSX_V4SESSIONID +
 860                                             5 * NFSX_UNSIGNED);
 861                                 else
 862                                         NFSM_DISSECT(tl, uint32_t *,
 863                                             NFSX_V4SESSIONID +
 864                                             4 * NFSX_UNSIGNED);
 865                                 mtx_lock(&sep->nfsess_mtx);
 866                                 if (bcmp(tl, sep->nfsess_sessionid,
 867                                     NFSX_V4SESSIONID) == 0) {
 868                                         tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 869                                         retseq = fxdr_unsigned(uint32_t, *tl++);
 870                                         slot = fxdr_unsigned(int, *tl++);
 871                                         freeslot = slot;
 872                                         if (retseq != sep->nfsess_slotseq[slot])
 873                                                 printf("retseq diff 0x%x\n",
 874                                                     retseq);
 875                                         retval = fxdr_unsigned(uint32_t, *++tl);
 876                                         if ((retval + 1) < sep->nfsess_foreslots
 877                                             )
 878                                                 sep->nfsess_foreslots = (retval
 879                                                     + 1);
 880                                         else if ((retval + 1) >
 881                                             sep->nfsess_foreslots)
 882                                                 sep->nfsess_foreslots = (retval
 883                                                     < 64) ? (retval + 1) : 64;
 884                                 }
 885                                 mtx_unlock(&sep->nfsess_mtx);
 886
 887                                 /* Grab the op and status for the next one. */
 888                                 if (opcnt > 1) {
 889                                         NFSM_DISSECT(tl, uint32_t *,
 890                                             2 * NFSX_UNSIGNED);
 891                                         i = fxdr_unsigned(int, *tl++);
 892                                         j = fxdr_unsigned(int, *tl);
 893                                 }
 894                         }
 895                 }
 896                 if (nd->nd_repstat != 0) {
 897                         if (nd->nd_repstat == NFSERR_BADSESSION &&
 898                             nmp != NULL && dssep == NULL) {
 899                                 /*
 900                                  * If this is a client side MDS RPC, mark
 901                                  * the MDS session defunct and initiate
 902                                  * recovery, as required.
 903                                  * The nfsess_defunct field is protected by
 904                                  * the NFSLOCKMNT()/nm_mtx lock and not the
 905                                  * nfsess_mtx lock to simplify its handling,
 906                                  * for the MDS session. This lock is also
 907                                  * sufficient for nfsess_sessionid, since it
 908                                  * never changes in the structure.
 909                                  */
 910                                 NFSCL_DEBUG(1, "Got badsession\n");
 911                                 NFSLOCKCLSTATE();
 912                                 NFSLOCKMNT(nmp);
 913                                 sep = NFSMNT_MDSSESSION(nmp);
 914                                 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence,
 915                                     NFSX_V4SESSIONID) == 0) {
 916                                         /* Initiate recovery. */
 917                                         sep->nfsess_defunct = 1;
 918                                         NFSCL_DEBUG(1, "Marked defunct\n");
 919                                         if (nmp->nm_clp != NULL) {
 920                                                 nmp->nm_clp->nfsc_flags |=
 921                                                     NFSCLFLAGS_RECOVER;
 922                                                 wakeup(nmp->nm_clp);
 923                                         }
 924                                 }
 925                                 NFSUNLOCKCLSTATE();
 926                                 /*
 927                                  * Sleep for up to 1sec waiting for a new
 928                                  * session.
 929                                  */
 930                                 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO,
 931                                     "nfsbadsess", hz);
 932                                 /*
 933                                  * Get the session again, in case a new one
 934                                  * has been created during the sleep.
 935                                  */
 936                                 sep = NFSMNT_MDSSESSION(nmp);
 937                                 NFSUNLOCKMNT(nmp);
 938                                 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) {
 939                                         reterr = nfsv4_sequencelookup(nmp, sep,
 940                                             &slotpos, &maxslot, &slotseq,
 941                                             sessionid);
 942                                         if (reterr == 0) {
 943                                                 /* Fill in new session info. */
 944                                                 NFSCL_DEBUG(1,
 945                                                   "Filling in new sequence\n");
 946                                                 tl = nd->nd_sequence;
 947                                                 bcopy(sessionid, tl,
 948                                                     NFSX_V4SESSIONID);
 949                                                 tl += NFSX_V4SESSIONID /
 950                                                     NFSX_UNSIGNED;
 951                                                 *tl++ = txdr_unsigned(slotseq);
 952                                                 *tl++ = txdr_unsigned(slotpos);
 953                                                 *tl = txdr_unsigned(maxslot);
 954                                         }
 955                                         if (reterr == NFSERR_BADSESSION ||
 956                                             reterr == 0) {
 957                                                 NFSCL_DEBUG(1,
 958                                                     "Badsession looping\n");
 959                                                 m_freem(nd->nd_mrep);
 960                                                 nd->nd_mrep = NULL;
 961                                                 goto tryagain;
 962                                         }
 963                                         nd->nd_repstat = reterr;
 964                                         NFSCL_DEBUG(1, "Got err=%d\n", reterr);
 965                                 }
 966                         }
 967                         if (((nd->nd_repstat == NFSERR_DELAY ||
 968                               nd->nd_repstat == NFSERR_GRACE) &&
 969                              (nd->nd_flag & ND_NFSV4) &&
 970                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 971                              nd->nd_procnum != NFSPROC_SETATTR &&
 972                              nd->nd_procnum != NFSPROC_READ &&
 973                              nd->nd_procnum != NFSPROC_READDS &&
 974                              nd->nd_procnum != NFSPROC_WRITE &&
 975                              nd->nd_procnum != NFSPROC_WRITEDS &&
 976                              nd->nd_procnum != NFSPROC_OPEN &&
 977                              nd->nd_procnum != NFSPROC_CREATE &&
 978                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 979                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 980                              nd->nd_procnum != NFSPROC_CLOSE &&
 981                              nd->nd_procnum != NFSPROC_LOCK &&
 982                              nd->nd_procnum != NFSPROC_LOCKU) ||
 983                             (nd->nd_repstat == NFSERR_DELAY &&
 984                              (nd->nd_flag & ND_NFSV4) == 0) ||
 985                             nd->nd_repstat == NFSERR_RESOURCE) {
 986                                 if (trylater_delay > NFS_TRYLATERDEL)
 987                                         trylater_delay = NFS_TRYLATERDEL;
 988                                 waituntil = NFSD_MONOSEC + trylater_delay;
 989                                 while (NFSD_MONOSEC < waituntil)
 990                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 991                                 trylater_delay *= 2;
 992                                 if (slot != -1) {
 993                                         mtx_lock(&sep->nfsess_mtx);
 994                                         sep->nfsess_slotseq[slot]++;
 995                                         *nd->nd_slotseq = txdr_unsigned(
 996                                             sep->nfsess_slotseq[slot]);
 997                                         mtx_unlock(&sep->nfsess_mtx);
 998                                 }
 999                                 m_freem(nd->nd_mrep);
1000                                 nd->nd_mrep = NULL;
1001                                 goto tryagain;
1002                         }
1003
1004                         /*
1005                          * If the File Handle was stale, invalidate the
1006                          * lookup cache, just in case.
1007                          * (vp != NULL implies a client side call)
1008                          */
1009                         if (nd->nd_repstat == ESTALE && vp != NULL) {
1010                                 cache_purge(vp);
1011                                 if (ncl_call_invalcaches != NULL)
1012                                         (*ncl_call_invalcaches)(vp);
1013                         }
1014                 }
1015                 if ((nd->nd_flag & ND_NFSV4) != 0) {
1016                         /* Free the slot, as required. */
1017                         if (freeslot != -1)
1018                                 nfsv4_freeslot(sep, freeslot);
1019                         /*
1020                          * If this op is Putfh, throw its results away.
1021                          */
1022                         if (j >= 10000)
1023                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
1024                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
1025                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
1026                                 i = fxdr_unsigned(int, *tl++);
1027                                 j = fxdr_unsigned(int, *tl);
1028                                 if (j >= 10000)
1029                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
1030                                             j);
1031                                 /*
1032                                  * All Compounds that do an Op that must
1033                                  * be in sequence consist of NFSV4OP_PUTFH
1034                                  * followed by one of these. As such, we
1035                                  * can determine if the seqid# should be
1036                                  * incremented, here.
1037                                  */
1038                                 if ((i == NFSV4OP_OPEN ||
1039                                      i == NFSV4OP_OPENCONFIRM ||
1040                                      i == NFSV4OP_OPENDOWNGRADE ||
1041                                      i == NFSV4OP_CLOSE ||
1042                                      i == NFSV4OP_LOCK ||
1043                                      i == NFSV4OP_LOCKU) &&
1044                                     (j == 0 ||
1045                                      (j != NFSERR_STALECLIENTID &&
1046                                       j != NFSERR_STALESTATEID &&
1047                                       j != NFSERR_BADSTATEID &&
1048                                       j != NFSERR_BADSEQID &&
1049                                       j != NFSERR_BADXDR &&
1050                                       j != NFSERR_RESOURCE &&
1051                                       j != NFSERR_NOFILEHANDLE)))
1052                                         nd->nd_flag |= ND_INCRSEQID;
1053                         }
1054                         /*
1055                          * If this op's status is non-zero, mark
1056                          * that there is no more data to process.
1057                          * The exception is Setattr, which always has xdr
1058                          * when it has failed.
1059                          */
1060                         if (j != 0 && i != NFSV4OP_SETATTR)
1061                                 nd->nd_flag |= ND_NOMOREDATA;
1062
1063                         /*
1064                          * If R_DONTRECOVER is set, replace the stale error
1065                          * reply, so that recovery isn't initiated.
1066                          */
1067                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
1068                              nd->nd_repstat == NFSERR_BADSESSION ||
1069                              nd->nd_repstat == NFSERR_STALESTATEID) &&
1070                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
1071                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
1072                 }
1073         }
1074
1075 #ifdef KDTRACE_HOOKS
1076         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
1077                 uint32_t probe_id;
1078                 int probe_procnum;
1079
1080                 if (nd->nd_flag & ND_NFSV4) {
1081                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
1082                         probe_procnum = nd->nd_procnum;
1083                 } else if (nd->nd_flag & ND_NFSV3) {
1084                         probe_id = nfscl_nfs3_done_probes[procnum];
1085                         probe_procnum = procnum;
1086                 } else {
1087                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
1088                         probe_procnum = procnum;
1089                 }
1090                 if (probe_id != 0)
1091                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
1092                             nd->nd_mreq, cred, probe_procnum, 0);
1093         }
1094 #endif
1095
1096         m_freem(nd->nd_mreq);
1097         if (usegssname == 0)
1098                 AUTH_DESTROY(auth);
1099         if (rep != NULL)
1100                 FREE((caddr_t)rep, M_NFSDREQ);
1101         if (set_sigset)
1102                 newnfs_restore_sigmask(td, &oldset);
1103         return (0);
1104 nfsmout:
1105         mbuf_freem(nd->nd_mrep);
1106         mbuf_freem(nd->nd_mreq);
1107         if (usegssname == 0)
1108                 AUTH_DESTROY(auth);
1109         if (rep != NULL)
1110                 FREE((caddr_t)rep, M_NFSDREQ);
1111         if (set_sigset)
1112                 newnfs_restore_sigmask(td, &oldset);
1113         return (error);
1114 }
1115
1116 /*
1117  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1118  * wait for all requests to complete. This is used by forced unmounts
1119  * to terminate any outstanding RPCs.
1120  */
1121 int
1122 newnfs_nmcancelreqs(struct nfsmount *nmp)
1123 {
1124
1125         if (nmp->nm_sockreq.nr_client != NULL)
1126                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1127         return (0);
1128 }
1129
1130 /*
1131  * Any signal that can interrupt an NFS operation in an intr mount
1132  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1133  */
1134 int newnfs_sig_set[] = {
1135         SIGINT,
1136         SIGTERM,
1137         SIGHUP,
1138         SIGKILL,
1139         SIGQUIT
1140 };
1141
1142 /*
1143  * Check to see if one of the signals in our subset is pending on
1144  * the process (in an intr mount).
1145  */
1146 static int
1147 nfs_sig_pending(sigset_t set)
1148 {
1149         int i;
1150
1151         for (i = 0 ; i < nitems(newnfs_sig_set); i++)
1152                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1153                         return (1);
1154         return (0);
1155 }
1156
1157 /*
1158  * The set/restore sigmask functions are used to (temporarily) overwrite
1159  * the thread td_sigmask during an RPC call (for example). These are also
1160  * used in other places in the NFS client that might tsleep().
1161  */
1162 void
1163 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1164 {
1165         sigset_t newset;
1166         int i;
1167         struct proc *p;
1168
1169         SIGFILLSET(newset);
1170         if (td == NULL)
1171                 td = curthread; /* XXX */
1172         p = td->td_proc;
1173         /* Remove the NFS set of signals from newset */
1174         PROC_LOCK(p);
1175         mtx_lock(&p->p_sigacts->ps_mtx);
1176         for (i = 0 ; i < nitems(newnfs_sig_set); i++) {
1177                 /*
1178                  * But make sure we leave the ones already masked
1179                  * by the process, ie. remove the signal from the
1180                  * temporary signalmask only if it wasn't already
1181                  * in p_sigmask.
1182                  */
1183                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1184                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1185                         SIGDELSET(newset, newnfs_sig_set[i]);
1186         }
1187         mtx_unlock(&p->p_sigacts->ps_mtx);
1188         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1189             SIGPROCMASK_PROC_LOCKED);
1190         PROC_UNLOCK(p);
1191 }
1192
1193 void
1194 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1195 {
1196         if (td == NULL)
1197                 td = curthread; /* XXX */
1198         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1199 }
1200
1201 /*
1202  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1203  * old one after msleep() returns.
1204  */
1205 int
1206 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1207 {
1208         sigset_t oldset;
1209         int error;
1210         struct proc *p;
1211
1212         if ((priority & PCATCH) == 0)
1213                 return msleep(ident, mtx, priority, wmesg, timo);
1214         if (td == NULL)
1215                 td = curthread; /* XXX */
1216         newnfs_set_sigmask(td, &oldset);
1217         error = msleep(ident, mtx, priority, wmesg, timo);
1218         newnfs_restore_sigmask(td, &oldset);
1219         p = td->td_proc;
1220         return (error);
1221 }
1222
1223 /*
1224  * Test for a termination condition pending on the process.
1225  * This is used for NFSMNT_INT mounts.
1226  */
1227 int
1228 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1229 {
1230         struct proc *p;
1231         sigset_t tmpset;
1232
1233         /* Terminate all requests while attempting a forced unmount. */
1234         if (NFSCL_FORCEDISM(nmp->nm_mountp))
1235                 return (EIO);
1236         if (!(nmp->nm_flag & NFSMNT_INT))
1237                 return (0);
1238         if (td == NULL)
1239                 return (0);
1240         p = td->td_proc;
1241         PROC_LOCK(p);
1242         tmpset = p->p_siglist;
1243         SIGSETOR(tmpset, td->td_siglist);
1244         SIGSETNAND(tmpset, td->td_sigmask);
1245         mtx_lock(&p->p_sigacts->ps_mtx);
1246         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1247         mtx_unlock(&p->p_sigacts->ps_mtx);
1248         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1249             && nfs_sig_pending(tmpset)) {
1250                 PROC_UNLOCK(p);
1251                 return (EINTR);
1252         }
1253         PROC_UNLOCK(p);
1254         return (0);
1255 }
1256
1257 static int
1258 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1259 {
1260         struct proc *p;
1261
1262         p = td ? td->td_proc : NULL;
1263         if (error) {
1264                 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n",
1265                     server, msg, error);
1266         } else {
1267                 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg);
1268         }
1269         return (0);
1270 }
1271
1272 static void
1273 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1274     int error, int flags)
1275 {
1276         if (nmp == NULL)
1277                 return;
1278         mtx_lock(&nmp->nm_mtx);
1279         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1280                 nmp->nm_state |= NFSSTA_TIMEO;
1281                 mtx_unlock(&nmp->nm_mtx);
1282                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1283                     VQ_NOTRESP, 0);
1284         } else
1285                 mtx_unlock(&nmp->nm_mtx);
1286         mtx_lock(&nmp->nm_mtx);
1287         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1288                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1289                 mtx_unlock(&nmp->nm_mtx);
1290                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1291                     VQ_NOTRESPLOCK, 0);
1292         } else
1293                 mtx_unlock(&nmp->nm_mtx);
1294         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1295 }
1296
1297 static void
1298 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1299     int flags, int tprintfmsg)
1300 {
1301         if (nmp == NULL)
1302                 return;
1303         if (tprintfmsg) {
1304                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1305         }
1306
1307         mtx_lock(&nmp->nm_mtx);
1308         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1309                 nmp->nm_state &= ~NFSSTA_TIMEO;
1310                 mtx_unlock(&nmp->nm_mtx);
1311                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1312                     VQ_NOTRESP, 1);
1313         } else
1314                 mtx_unlock(&nmp->nm_mtx);
1315
1316         mtx_lock(&nmp->nm_mtx);
1317         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1318                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1319                 mtx_unlock(&nmp->nm_mtx);
1320                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1321                     VQ_NOTRESPLOCK, 1);
1322         } else
1323                 mtx_unlock(&nmp->nm_mtx);
1324 }
1325