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_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 extern struct nfsstatsv1 nfsstatsv1;
  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, "nfsreq");
 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                 mtx_unlock(&nrp->nr_mtx);
 340                 /*
 341                  * Someone else already connected.
 342                  */
 343                 CLNT_RELEASE(client);
 344         } else {
 345                 nrp->nr_client = client;
 346                 /*
 347                  * Protocols that do not require connections may be optionally
 348                  * left unconnected for servers that reply from a port other
 349                  * 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
 359         /* Restore current thread's credentials. */
 360         td->td_ucred = origcred;
 361
 362 out:
 363         NFSEXITCODE(error);
 364         return (error);
 365 }
 366
 367 /*
 368  * NFS disconnect. Clean up and unlink.
 369  */
 370 void
 371 newnfs_disconnect(struct nfssockreq *nrp)
 372 {
 373         CLIENT *client;
 374
 375         mtx_lock(&nrp->nr_mtx);
 376         if (nrp->nr_client != NULL) {
 377                 client = nrp->nr_client;
 378                 nrp->nr_client = NULL;
 379                 mtx_unlock(&nrp->nr_mtx);
 380                 rpc_gss_secpurge_call(client);
 381                 CLNT_CLOSE(client);
 382                 CLNT_RELEASE(client);
 383         } else {
 384                 mtx_unlock(&nrp->nr_mtx);
 385         }
 386 }
 387
 388 static AUTH *
 389 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
 390     char *srv_principal, gss_OID mech_oid, struct ucred *cred)
 391 {
 392         rpc_gss_service_t svc;
 393         AUTH *auth;
 394
 395         switch (secflavour) {
 396         case RPCSEC_GSS_KRB5:
 397         case RPCSEC_GSS_KRB5I:
 398         case RPCSEC_GSS_KRB5P:
 399                 if (!mech_oid) {
 400                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 401                                 return (NULL);
 402                 }
 403                 if (secflavour == RPCSEC_GSS_KRB5)
 404                         svc = rpc_gss_svc_none;
 405                 else if (secflavour == RPCSEC_GSS_KRB5I)
 406                         svc = rpc_gss_svc_integrity;
 407                 else
 408                         svc = rpc_gss_svc_privacy;
 409
 410                 if (clnt_principal == NULL)
 411                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 412                             srv_principal, mech_oid, svc);
 413                 else {
 414                         auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
 415                             clnt_principal, srv_principal, "kerberosv5",
 416                             svc, NULL, NULL, NULL);
 417                         return (auth);
 418                 }
 419                 if (auth != NULL)
 420                         return (auth);
 421                 /* fallthrough */
 422         case AUTH_SYS:
 423         default:
 424                 return (authunix_create(cred));
 425
 426         }
 427 }
 428
 429 /*
 430  * Callback from the RPC code to generate up/down notifications.
 431  */
 432
 433 struct nfs_feedback_arg {
 434         struct nfsmount *nf_mount;
 435         int             nf_lastmsg;     /* last tprintf */
 436         int             nf_tprintfmsg;
 437         struct thread   *nf_td;
 438 };
 439
 440 static void
 441 nfs_feedback(int type, int proc, void *arg)
 442 {
 443         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 444         struct nfsmount *nmp = nf->nf_mount;
 445         time_t now;
 446
 447         switch (type) {
 448         case FEEDBACK_REXMIT2:
 449         case FEEDBACK_RECONNECT:
 450                 now = NFSD_MONOSEC;
 451                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 452                         nfs_down(nmp, nf->nf_td,
 453                             "not responding", 0, NFSSTA_TIMEO);
 454                         nf->nf_tprintfmsg = TRUE;
 455                         nf->nf_lastmsg = now;
 456                 }
 457                 break;
 458
 459         case FEEDBACK_OK:
 460                 nfs_up(nf->nf_mount, nf->nf_td,
 461                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 462                 break;
 463         }
 464 }
 465
 466 /*
 467  * newnfs_request - goes something like this
 468  *      - does the rpc by calling the krpc layer
 469  *      - break down rpc header and return with nfs reply
 470  * nb: always frees up nd_mreq mbuf list
 471  */
 472 int
 473 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 474     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 475     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 476     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
 477 {
 478         u_int32_t retseq, retval, *tl;
 479         time_t waituntil;
 480         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 481         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 482         int freeslot, timeo;
 483         u_int16_t procnum;
 484         u_int trylater_delay = 1;
 485         struct nfs_feedback_arg nf;
 486         struct timeval timo;
 487         AUTH *auth;
 488         struct rpc_callextra ext;
 489         enum clnt_stat stat;
 490         struct nfsreq *rep = NULL;
 491         char *srv_principal = NULL, *clnt_principal = NULL;
 492         sigset_t oldset;
 493         struct ucred *authcred;
 494
 495         if (xidp != NULL)
 496                 *xidp = 0;
 497         /* Reject requests while attempting a forced unmount. */
 498         if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
 499                 m_freem(nd->nd_mreq);
 500                 return (ESTALE);
 501         }
 502
 503         /*
 504          * Set authcred, which is used to acquire RPC credentials to
 505          * the cred argument, by default. The crhold() should not be
 506          * necessary, but will ensure that some future code change
 507          * doesn't result in the credential being free'd prematurely.
 508          */
 509         authcred = crhold(cred);
 510
 511         /* For client side interruptible mounts, mask off the signals. */
 512         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 513                 newnfs_set_sigmask(td, &oldset);
 514                 set_sigset = 1;
 515         }
 516
 517         /*
 518          * XXX if not already connected call nfs_connect now. Longer
 519          * term, change nfs_mount to call nfs_connect unconditionally
 520          * and let clnt_reconnect_create handle reconnects.
 521          */
 522         if (nrp->nr_client == NULL)
 523                 newnfs_connect(nmp, nrp, cred, td, 0);
 524
 525         /*
 526          * For a client side mount, nmp is != NULL and clp == NULL. For
 527          * server calls (callbacks or upcalls), nmp == NULL.
 528          */
 529         if (clp != NULL) {
 530                 NFSLOCKSTATE();
 531                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 532                         secflavour = RPCSEC_GSS_KRB5;
 533                         if (nd->nd_procnum != NFSPROC_NULL) {
 534                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 535                                         secflavour = RPCSEC_GSS_KRB5I;
 536                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 537                                         secflavour = RPCSEC_GSS_KRB5P;
 538                         }
 539                 }
 540                 NFSUNLOCKSTATE();
 541         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 542              nd->nd_procnum != NFSPROC_NULL) {
 543                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 544                         nd->nd_flag |= ND_USEGSSNAME;
 545                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 546                         /*
 547                          * If there is a client side host based credential,
 548                          * use that, otherwise use the system uid, if set.
 549                          * The system uid is in the nmp->nm_sockreq.nr_cred
 550                          * credentials.
 551                          */
 552                         if (nmp->nm_krbnamelen > 0) {
 553                                 usegssname = 1;
 554                                 clnt_principal = nmp->nm_krbname;
 555                         } else if (nmp->nm_uid != (uid_t)-1) {
 556                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 557                                     ("newnfs_request: NULL nr_cred"));
 558                                 crfree(authcred);
 559                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 560                         }
 561                 } else if (nmp->nm_krbnamelen == 0 &&
 562                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 563                         /*
 564                          * If there is no host based principal name and
 565                          * the system uid is set and this is root, use the
 566                          * system uid, since root won't have user
 567                          * credentials in a credentials cache file.
 568                          * The system uid is in the nmp->nm_sockreq.nr_cred
 569                          * credentials.
 570                          */
 571                         KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 572                             ("newnfs_request: NULL nr_cred"));
 573                         crfree(authcred);
 574                         authcred = crhold(nmp->nm_sockreq.nr_cred);
 575                 }
 576                 if (NFSHASINTEGRITY(nmp))
 577                         secflavour = RPCSEC_GSS_KRB5I;
 578                 else if (NFSHASPRIVACY(nmp))
 579                         secflavour = RPCSEC_GSS_KRB5P;
 580                 else
 581                         secflavour = RPCSEC_GSS_KRB5;
 582                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 583         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 584             nd->nd_procnum != NFSPROC_NULL &&
 585             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 586                 /*
 587                  * Use the uid that did the mount when the RPC is doing
 588                  * NFSv4 system operations, as indicated by the
 589                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 590                  * The credentials in nm_sockreq.nr_cred were used for the
 591                  * mount.
 592                  */
 593                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 594                     ("newnfs_request: NULL nr_cred"));
 595                 crfree(authcred);
 596                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 597         }
 598
 599         if (nmp != NULL) {
 600                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 601                 nf.nf_mount = nmp;
 602                 nf.nf_td = td;
 603                 nf.nf_lastmsg = NFSD_MONOSEC -
 604                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 605         }
 606
 607         if (nd->nd_procnum == NFSPROC_NULL)
 608                 auth = authnone_create();
 609         else if (usegssname) {
 610                 /*
 611                  * For this case, the authenticator is held in the
 612                  * nfssockreq structure, so don't release the reference count
 613                  * held on it. --> Don't AUTH_DESTROY() it in this function.
 614                  */
 615                 if (nrp->nr_auth == NULL)
 616                         nrp->nr_auth = nfs_getauth(nrp, secflavour,
 617                             clnt_principal, srv_principal, NULL, authcred);
 618                 else
 619                         rpc_gss_refresh_auth_call(nrp->nr_auth);
 620                 auth = nrp->nr_auth;
 621         } else
 622                 auth = nfs_getauth(nrp, secflavour, NULL,
 623                     srv_principal, NULL, authcred);
 624         crfree(authcred);
 625         if (auth == NULL) {
 626                 m_freem(nd->nd_mreq);
 627                 if (set_sigset)
 628                         newnfs_restore_sigmask(td, &oldset);
 629                 return (EACCES);
 630         }
 631         bzero(&ext, sizeof(ext));
 632         ext.rc_auth = auth;
 633         if (nmp != NULL) {
 634                 ext.rc_feedback = nfs_feedback;
 635                 ext.rc_feedback_arg = &nf;
 636         }
 637
 638         procnum = nd->nd_procnum;
 639         if ((nd->nd_flag & ND_NFSV4) &&
 640             nd->nd_procnum != NFSPROC_NULL &&
 641             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 642                 procnum = NFSV4PROC_COMPOUND;
 643
 644         if (nmp != NULL) {
 645                 NFSINCRGLOBAL(nfsstatsv1.rpcrequests);
 646
 647                 /* Map the procnum to the old NFSv2 one, as required. */
 648                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 649                         if (nd->nd_procnum < NFS_V3NPROCS)
 650                                 procnum = nfsv2_procid[nd->nd_procnum];
 651                         else
 652                                 procnum = NFSV2PROC_NOOP;
 653                 }
 654
 655                 /*
 656                  * Now only used for the R_DONTRECOVER case, but until that is
 657                  * supported within the krpc code, I need to keep a queue of
 658                  * outstanding RPCs for nfsv4 client requests.
 659                  */
 660                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 661                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 662                             M_NFSDREQ, M_WAITOK);
 663 #ifdef KDTRACE_HOOKS
 664                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 665                         uint32_t probe_id;
 666                         int probe_procnum;
 667
 668                         if (nd->nd_flag & ND_NFSV4) {
 669                                 probe_id =
 670                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 671                                 probe_procnum = nd->nd_procnum;
 672                         } else if (nd->nd_flag & ND_NFSV3) {
 673                                 probe_id = nfscl_nfs3_start_probes[procnum];
 674                                 probe_procnum = procnum;
 675                         } else {
 676                                 probe_id =
 677                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 678                                 probe_procnum = procnum;
 679                         }
 680                         if (probe_id != 0)
 681                                 (dtrace_nfscl_nfs234_start_probe)
 682                                     (probe_id, vp, nd->nd_mreq, cred,
 683                                      probe_procnum);
 684                 }
 685 #endif
 686         }
 687         trycnt = 0;
 688         freeslot = -1;          /* Set to slot that needs to be free'd */
 689 tryagain:
 690         slot = -1;              /* Slot that needs a sequence# increment. */
 691         /*
 692          * This timeout specifies when a new socket should be created,
 693          * along with new xid values. For UDP, this should be done
 694          * infrequently, since retransmits of RPC requests should normally
 695          * use the same xid.
 696          */
 697         if (nmp == NULL) {
 698                 timo.tv_usec = 0;
 699                 if (clp == NULL)
 700                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 701                 else
 702                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 703         } else {
 704                 if (nrp->nr_sotype != SOCK_DGRAM) {
 705                         timo.tv_usec = 0;
 706                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 707                                 timo.tv_sec = INT_MAX;
 708                         else
 709                                 timo.tv_sec = NFS_TCPTIMEO;
 710                 } else {
 711                         if (NFSHASSOFT(nmp)) {
 712                                 /*
 713                                  * CLSET_RETRIES is set to 2, so this should be
 714                                  * half of the total timeout required.
 715                                  */
 716                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 717                                 if (timeo < 1)
 718                                         timeo = 1;
 719                                 timo.tv_sec = timeo / NFS_HZ;
 720                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 721                                     NFS_HZ;
 722                         } else {
 723                                 /* For UDP hard mounts, use a large value. */
 724                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 725                                 timo.tv_usec = 0;
 726                         }
 727                 }
 728
 729                 if (rep != NULL) {
 730                         rep->r_flags = 0;
 731                         rep->r_nmp = nmp;
 732                         /*
 733                          * Chain request into list of outstanding requests.
 734                          */
 735                         NFSLOCKREQ();
 736                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 737                         NFSUNLOCKREQ();
 738                 }
 739         }
 740
 741         nd->nd_mrep = NULL;
 742         if (clp != NULL && sep != NULL)
 743                 stat = clnt_bck_call(nrp->nr_client, &ext, procnum,
 744                     nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt);
 745         else
 746                 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum,
 747                     nd->nd_mreq, &nd->nd_mrep, timo);
 748
 749         if (rep != NULL) {
 750                 /*
 751                  * RPC done, unlink the request.
 752                  */
 753                 NFSLOCKREQ();
 754                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 755                 NFSUNLOCKREQ();
 756         }
 757
 758         /*
 759          * If there was a successful reply and a tprintf msg.
 760          * tprintf a response.
 761          */
 762         if (stat == RPC_SUCCESS) {
 763                 error = 0;
 764         } else if (stat == RPC_TIMEDOUT) {
 765                 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts);
 766                 error = ETIMEDOUT;
 767         } else if (stat == RPC_VERSMISMATCH) {
 768                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 769                 error = EOPNOTSUPP;
 770         } else if (stat == RPC_PROGVERSMISMATCH) {
 771                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 772                 error = EPROTONOSUPPORT;
 773         } else if (stat == RPC_INTR) {
 774                 error = EINTR;
 775         } else {
 776                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 777                 error = EACCES;
 778         }
 779         if (error) {
 780                 m_freem(nd->nd_mreq);
 781                 if (usegssname == 0)
 782                         AUTH_DESTROY(auth);
 783                 if (rep != NULL)
 784                         FREE((caddr_t)rep, M_NFSDREQ);
 785                 if (set_sigset)
 786                         newnfs_restore_sigmask(td, &oldset);
 787                 return (error);
 788         }
 789
 790         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 791
 792         /*
 793          * Search for any mbufs that are not a multiple of 4 bytes long
 794          * or with m_data not longword aligned.
 795          * These could cause pointer alignment problems, so copy them to
 796          * well aligned mbufs.
 797          */
 798         newnfs_realign(&nd->nd_mrep, M_WAITOK);
 799         nd->nd_md = nd->nd_mrep;
 800         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 801         nd->nd_repstat = 0;
 802         if (nd->nd_procnum != NFSPROC_NULL &&
 803             nd->nd_procnum != NFSV4PROC_CBNULL) {
 804                 /* If sep == NULL, set it to the default in nmp. */
 805                 if (sep == NULL && nmp != NULL)
 806                         sep = NFSMNT_MDSSESSION(nmp);
 807                 /*
 808                  * and now the actual NFS xdr.
 809                  */
 810                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 811                 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 812                 if (nd->nd_repstat >= 10000)
 813                         NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
 814                             (int)nd->nd_repstat);
 815
 816                 /*
 817                  * Get rid of the tag, return count and SEQUENCE result for
 818                  * NFSv4.
 819                  */
 820                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 821                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 822                         i = fxdr_unsigned(int, *tl);
 823                         error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
 824                         if (error)
 825                                 goto nfsmout;
 826                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 827                         opcnt = fxdr_unsigned(int, *tl++);
 828                         i = fxdr_unsigned(int, *tl++);
 829                         j = fxdr_unsigned(int, *tl);
 830                         if (j >= 10000)
 831                                 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
 832                         /*
 833                          * If the first op is Sequence, free up the slot.
 834                          */
 835                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) ||
 836                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0))
 837                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 838                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) ||
 839                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0)
 840                             ) {
 841                                 if (i == NFSV4OP_SEQUENCE)
 842                                         NFSM_DISSECT(tl, uint32_t *,
 843                                             NFSX_V4SESSIONID +
 844                                             5 * NFSX_UNSIGNED);
 845                                 else
 846                                         NFSM_DISSECT(tl, uint32_t *,
 847                                             NFSX_V4SESSIONID +
 848                                             4 * NFSX_UNSIGNED);
 849                                 mtx_lock(&sep->nfsess_mtx);
 850                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 851                                 retseq = fxdr_unsigned(uint32_t, *tl++);
 852                                 slot = fxdr_unsigned(int, *tl++);
 853                                 freeslot = slot;
 854                                 if (retseq != sep->nfsess_slotseq[slot])
 855                                         printf("retseq diff 0x%x\n", retseq);
 856                                 retval = fxdr_unsigned(uint32_t, *++tl);
 857                                 if ((retval + 1) < sep->nfsess_foreslots)
 858                                         sep->nfsess_foreslots = (retval + 1);
 859                                 else if ((retval + 1) > sep->nfsess_foreslots)
 860                                         sep->nfsess_foreslots = (retval < 64) ?
 861                                             (retval + 1) : 64;
 862                                 mtx_unlock(&sep->nfsess_mtx);
 863
 864                                 /* Grab the op and status for the next one. */
 865                                 if (opcnt > 1) {
 866                                         NFSM_DISSECT(tl, uint32_t *,
 867                                             2 * NFSX_UNSIGNED);
 868                                         i = fxdr_unsigned(int, *tl++);
 869                                         j = fxdr_unsigned(int, *tl);
 870                                 }
 871                         }
 872                 }
 873                 if (nd->nd_repstat != 0) {
 874                         if (((nd->nd_repstat == NFSERR_DELAY ||
 875                               nd->nd_repstat == NFSERR_GRACE) &&
 876                              (nd->nd_flag & ND_NFSV4) &&
 877                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 878                              nd->nd_procnum != NFSPROC_SETATTR &&
 879                              nd->nd_procnum != NFSPROC_READ &&
 880                              nd->nd_procnum != NFSPROC_READDS &&
 881                              nd->nd_procnum != NFSPROC_WRITE &&
 882                              nd->nd_procnum != NFSPROC_WRITEDS &&
 883                              nd->nd_procnum != NFSPROC_OPEN &&
 884                              nd->nd_procnum != NFSPROC_CREATE &&
 885                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 886                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 887                              nd->nd_procnum != NFSPROC_CLOSE &&
 888                              nd->nd_procnum != NFSPROC_LOCK &&
 889                              nd->nd_procnum != NFSPROC_LOCKU) ||
 890                             (nd->nd_repstat == NFSERR_DELAY &&
 891                              (nd->nd_flag & ND_NFSV4) == 0) ||
 892                             nd->nd_repstat == NFSERR_RESOURCE) {
 893                                 if (trylater_delay > NFS_TRYLATERDEL)
 894                                         trylater_delay = NFS_TRYLATERDEL;
 895                                 waituntil = NFSD_MONOSEC + trylater_delay;
 896                                 while (NFSD_MONOSEC < waituntil)
 897                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 898                                 trylater_delay *= 2;
 899                                 if (slot != -1) {
 900                                         mtx_lock(&sep->nfsess_mtx);
 901                                         sep->nfsess_slotseq[slot]++;
 902                                         *nd->nd_slotseq = txdr_unsigned(
 903                                             sep->nfsess_slotseq[slot]);
 904                                         mtx_unlock(&sep->nfsess_mtx);
 905                                 }
 906                                 m_freem(nd->nd_mrep);
 907                                 nd->nd_mrep = NULL;
 908                                 goto tryagain;
 909                         }
 910
 911                         /*
 912                          * If the File Handle was stale, invalidate the
 913                          * lookup cache, just in case.
 914                          * (vp != NULL implies a client side call)
 915                          */
 916                         if (nd->nd_repstat == ESTALE && vp != NULL) {
 917                                 cache_purge(vp);
 918                                 if (ncl_call_invalcaches != NULL)
 919                                         (*ncl_call_invalcaches)(vp);
 920                         }
 921                 }
 922                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 923                         /* Free the slot, as required. */
 924                         if (freeslot != -1)
 925                                 nfsv4_freeslot(sep, freeslot);
 926                         /*
 927                          * If this op is Putfh, throw its results away.
 928                          */
 929                         if (j >= 10000)
 930                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
 931                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
 932                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
 933                                 i = fxdr_unsigned(int, *tl++);
 934                                 j = fxdr_unsigned(int, *tl);
 935                                 if (j >= 10000)
 936                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
 937                                             j);
 938                                 /*
 939                                  * All Compounds that do an Op that must
 940                                  * be in sequence consist of NFSV4OP_PUTFH
 941                                  * followed by one of these. As such, we
 942                                  * can determine if the seqid# should be
 943                                  * incremented, here.
 944                                  */
 945                                 if ((i == NFSV4OP_OPEN ||
 946                                      i == NFSV4OP_OPENCONFIRM ||
 947                                      i == NFSV4OP_OPENDOWNGRADE ||
 948                                      i == NFSV4OP_CLOSE ||
 949                                      i == NFSV4OP_LOCK ||
 950                                      i == NFSV4OP_LOCKU) &&
 951                                     (j == 0 ||
 952                                      (j != NFSERR_STALECLIENTID &&
 953                                       j != NFSERR_STALESTATEID &&
 954                                       j != NFSERR_BADSTATEID &&
 955                                       j != NFSERR_BADSEQID &&
 956                                       j != NFSERR_BADXDR &&
 957                                       j != NFSERR_RESOURCE &&
 958                                       j != NFSERR_NOFILEHANDLE)))
 959                                         nd->nd_flag |= ND_INCRSEQID;
 960                         }
 961                         /*
 962                          * If this op's status is non-zero, mark
 963                          * that there is no more data to process.
 964                          */
 965                         if (j)
 966                                 nd->nd_flag |= ND_NOMOREDATA;
 967
 968                         /*
 969                          * If R_DONTRECOVER is set, replace the stale error
 970                          * reply, so that recovery isn't initiated.
 971                          */
 972                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
 973                              nd->nd_repstat == NFSERR_BADSESSION ||
 974                              nd->nd_repstat == NFSERR_STALESTATEID) &&
 975                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
 976                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
 977                 }
 978         }
 979
 980 #ifdef KDTRACE_HOOKS
 981         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
 982                 uint32_t probe_id;
 983                 int probe_procnum;
 984
 985                 if (nd->nd_flag & ND_NFSV4) {
 986                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
 987                         probe_procnum = nd->nd_procnum;
 988                 } else if (nd->nd_flag & ND_NFSV3) {
 989                         probe_id = nfscl_nfs3_done_probes[procnum];
 990                         probe_procnum = procnum;
 991                 } else {
 992                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
 993                         probe_procnum = procnum;
 994                 }
 995                 if (probe_id != 0)
 996                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
 997                             nd->nd_mreq, cred, probe_procnum, 0);
 998         }
 999 #endif
1000
1001         m_freem(nd->nd_mreq);
1002         if (usegssname == 0)
1003                 AUTH_DESTROY(auth);
1004         if (rep != NULL)
1005                 FREE((caddr_t)rep, M_NFSDREQ);
1006         if (set_sigset)
1007                 newnfs_restore_sigmask(td, &oldset);
1008         return (0);
1009 nfsmout:
1010         mbuf_freem(nd->nd_mrep);
1011         mbuf_freem(nd->nd_mreq);
1012         if (usegssname == 0)
1013                 AUTH_DESTROY(auth);
1014         if (rep != NULL)
1015                 FREE((caddr_t)rep, M_NFSDREQ);
1016         if (set_sigset)
1017                 newnfs_restore_sigmask(td, &oldset);
1018         return (error);
1019 }
1020
1021 /*
1022  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1023  * wait for all requests to complete. This is used by forced unmounts
1024  * to terminate any outstanding RPCs.
1025  */
1026 int
1027 newnfs_nmcancelreqs(struct nfsmount *nmp)
1028 {
1029
1030         if (nmp->nm_sockreq.nr_client != NULL)
1031                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1032         return (0);
1033 }
1034
1035 /*
1036  * Any signal that can interrupt an NFS operation in an intr mount
1037  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1038  */
1039 int newnfs_sig_set[] = {
1040         SIGINT,
1041         SIGTERM,
1042         SIGHUP,
1043         SIGKILL,
1044         SIGQUIT
1045 };
1046
1047 /*
1048  * Check to see if one of the signals in our subset is pending on
1049  * the process (in an intr mount).
1050  */
1051 static int
1052 nfs_sig_pending(sigset_t set)
1053 {
1054         int i;
1055
1056         for (i = 0 ; i < nitems(newnfs_sig_set); i++)
1057                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1058                         return (1);
1059         return (0);
1060 }
1061
1062 /*
1063  * The set/restore sigmask functions are used to (temporarily) overwrite
1064  * the thread td_sigmask during an RPC call (for example). These are also
1065  * used in other places in the NFS client that might tsleep().
1066  */
1067 void
1068 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1069 {
1070         sigset_t newset;
1071         int i;
1072         struct proc *p;
1073
1074         SIGFILLSET(newset);
1075         if (td == NULL)
1076                 td = curthread; /* XXX */
1077         p = td->td_proc;
1078         /* Remove the NFS set of signals from newset */
1079         PROC_LOCK(p);
1080         mtx_lock(&p->p_sigacts->ps_mtx);
1081         for (i = 0 ; i < nitems(newnfs_sig_set); i++) {
1082                 /*
1083                  * But make sure we leave the ones already masked
1084                  * by the process, ie. remove the signal from the
1085                  * temporary signalmask only if it wasn't already
1086                  * in p_sigmask.
1087                  */
1088                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1089                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1090                         SIGDELSET(newset, newnfs_sig_set[i]);
1091         }
1092         mtx_unlock(&p->p_sigacts->ps_mtx);
1093         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1094             SIGPROCMASK_PROC_LOCKED);
1095         PROC_UNLOCK(p);
1096 }
1097
1098 void
1099 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1100 {
1101         if (td == NULL)
1102                 td = curthread; /* XXX */
1103         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1104 }
1105
1106 /*
1107  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1108  * old one after msleep() returns.
1109  */
1110 int
1111 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1112 {
1113         sigset_t oldset;
1114         int error;
1115         struct proc *p;
1116
1117         if ((priority & PCATCH) == 0)
1118                 return msleep(ident, mtx, priority, wmesg, timo);
1119         if (td == NULL)
1120                 td = curthread; /* XXX */
1121         newnfs_set_sigmask(td, &oldset);
1122         error = msleep(ident, mtx, priority, wmesg, timo);
1123         newnfs_restore_sigmask(td, &oldset);
1124         p = td->td_proc;
1125         return (error);
1126 }
1127
1128 /*
1129  * Test for a termination condition pending on the process.
1130  * This is used for NFSMNT_INT mounts.
1131  */
1132 int
1133 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1134 {
1135         struct proc *p;
1136         sigset_t tmpset;
1137
1138         /* Terminate all requests while attempting a forced unmount. */
1139         if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1140                 return (EIO);
1141         if (!(nmp->nm_flag & NFSMNT_INT))
1142                 return (0);
1143         if (td == NULL)
1144                 return (0);
1145         p = td->td_proc;
1146         PROC_LOCK(p);
1147         tmpset = p->p_siglist;
1148         SIGSETOR(tmpset, td->td_siglist);
1149         SIGSETNAND(tmpset, td->td_sigmask);
1150         mtx_lock(&p->p_sigacts->ps_mtx);
1151         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1152         mtx_unlock(&p->p_sigacts->ps_mtx);
1153         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1154             && nfs_sig_pending(tmpset)) {
1155                 PROC_UNLOCK(p);
1156                 return (EINTR);
1157         }
1158         PROC_UNLOCK(p);
1159         return (0);
1160 }
1161
1162 static int
1163 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1164 {
1165         struct proc *p;
1166
1167         p = td ? td->td_proc : NULL;
1168         if (error) {
1169                 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n",
1170                     server, msg, error);
1171         } else {
1172                 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg);
1173         }
1174         return (0);
1175 }
1176
1177 static void
1178 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1179     int error, int flags)
1180 {
1181         if (nmp == NULL)
1182                 return;
1183         mtx_lock(&nmp->nm_mtx);
1184         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1185                 nmp->nm_state |= NFSSTA_TIMEO;
1186                 mtx_unlock(&nmp->nm_mtx);
1187                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1188                     VQ_NOTRESP, 0);
1189         } else
1190                 mtx_unlock(&nmp->nm_mtx);
1191         mtx_lock(&nmp->nm_mtx);
1192         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1193                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1194                 mtx_unlock(&nmp->nm_mtx);
1195                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1196                     VQ_NOTRESPLOCK, 0);
1197         } else
1198                 mtx_unlock(&nmp->nm_mtx);
1199         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1200 }
1201
1202 static void
1203 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1204     int flags, int tprintfmsg)
1205 {
1206         if (nmp == NULL)
1207                 return;
1208         if (tprintfmsg) {
1209                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1210         }
1211
1212         mtx_lock(&nmp->nm_mtx);
1213         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1214                 nmp->nm_state &= ~NFSSTA_TIMEO;
1215                 mtx_unlock(&nmp->nm_mtx);
1216                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1217                     VQ_NOTRESP, 1);
1218         } else
1219                 mtx_unlock(&nmp->nm_mtx);
1220
1221         mtx_lock(&nmp->nm_mtx);
1222         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1223                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1224                 mtx_unlock(&nmp->nm_mtx);
1225                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1226                     VQ_NOTRESPLOCK, 1);
1227         } else
1228                 mtx_unlock(&nmp->nm_mtx);
1229 }
1230