sys/fs/nfs/nfs_commonkrpc.c

   1 /*-
   2  * Copyright (c) 1989, 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 /*
  38  * Socket operations for use by nfs
  39  */
  40
  41 #include "opt_kdtrace.h"
  42 #include "opt_kgssapi.h"
  43 #include "opt_nfs.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/kernel.h>
  48 #include <sys/limits.h>
  49 #include <sys/lock.h>
  50 #include <sys/malloc.h>
  51 #include <sys/mbuf.h>
  52 #include <sys/mount.h>
  53 #include <sys/mutex.h>
  54 #include <sys/proc.h>
  55 #include <sys/signalvar.h>
  56 #include <sys/syscallsubr.h>
  57 #include <sys/sysctl.h>
  58 #include <sys/syslog.h>
  59 #include <sys/vnode.h>
  60
  61 #include <rpc/rpc.h>
  62 #include <rpc/krpc.h>
  63
  64 #include <kgssapi/krb5/kcrypto.h>
  65
  66 #include <fs/nfs/nfsport.h>
  67
  68 #ifdef KDTRACE_HOOKS
  69 #include <sys/dtrace_bsd.h>
  70
  71 dtrace_nfsclient_nfs23_start_probe_func_t
  72                 dtrace_nfscl_nfs234_start_probe;
  73
  74 dtrace_nfsclient_nfs23_done_probe_func_t
  75                 dtrace_nfscl_nfs234_done_probe;
  76
  77 /*
  78  * Registered probes by RPC type.
  79  */
  80 uint32_t        nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
  81 uint32_t        nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
  82
  83 uint32_t        nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
  84 uint32_t        nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
  85
  86 uint32_t        nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
  87 uint32_t        nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
  88 #endif
  89
  90 NFSSTATESPINLOCK;
  91 NFSREQSPINLOCK;
  92 NFSDLOCKMUTEX;
  93 extern struct nfsstats newnfsstats;
  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;
 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
 203                 if (nrp->nr_sotype == SOCK_DGRAM)
 204                         nconf = getnetconfigent("udp6");
 205                 else
 206                         nconf = getnetconfigent("tcp6");
 207
 208         pktscale = nfs_bufpackets;
 209         if (pktscale < 2)
 210                 pktscale = 2;
 211         if (pktscale > 64)
 212                 pktscale = 64;
 213         /*
 214          * soreserve() can fail if sb_max is too small, so shrink pktscale
 215          * and try again if there is an error.
 216          * Print a log message suggesting increasing sb_max.
 217          * Creating a socket and doing this is necessary since, if the
 218          * reservation sizes are too large and will make soreserve() fail,
 219          * the connection will work until a large send is attempted and
 220          * then it will loop in the krpc code.
 221          */
 222         so = NULL;
 223         saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
 224         error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
 225             nrp->nr_soproto, td->td_ucred, td);
 226         if (error) {
 227                 td->td_ucred = origcred;
 228                 goto out;
 229         }
 230         do {
 231             if (error != 0 && pktscale > 2)
 232                 pktscale--;
 233             if (nrp->nr_sotype == SOCK_DGRAM) {
 234                 if (nmp != NULL) {
 235                         sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 236                             pktscale;
 237                         rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 238                             pktscale;
 239                 } else {
 240                         sndreserve = rcvreserve = 1024 * pktscale;
 241                 }
 242             } else {
 243                 if (nrp->nr_sotype != SOCK_STREAM)
 244                         panic("nfscon sotype");
 245                 if (nmp != NULL) {
 246                         sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 247                             sizeof (u_int32_t)) * pktscale;
 248                         rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 249                             sizeof (u_int32_t)) * pktscale;
 250                 } else {
 251                         sndreserve = rcvreserve = 1024 * pktscale;
 252                 }
 253             }
 254             error = soreserve(so, sndreserve, rcvreserve);
 255         } while (error != 0 && pktscale > 2);
 256         soclose(so);
 257         if (error) {
 258                 td->td_ucred = origcred;
 259                 goto out;
 260         }
 261
 262         client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
 263             nrp->nr_vers, sndreserve, rcvreserve);
 264         CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
 265         if (nmp != NULL) {
 266                 if ((nmp->nm_flag & NFSMNT_INT))
 267                         CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
 268                 if ((nmp->nm_flag & NFSMNT_RESVPORT))
 269                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 270                 if (NFSHASSOFT(nmp)) {
 271                         if (nmp->nm_sotype == SOCK_DGRAM)
 272                                 /*
 273                                  * For UDP, the large timeout for a reconnect
 274                                  * will be set to "nm_retry * nm_timeo / 2", so
 275                                  * we only want to do 2 reconnect timeout
 276                                  * retries.
 277                                  */
 278                                 retries = 2;
 279                         else
 280                                 retries = nmp->nm_retry;
 281                 } else
 282                         retries = INT_MAX;
 283                 if (NFSHASNFSV4N(nmp)) {
 284                         /*
 285                          * Make sure the nfscbd_pool doesn't get destroyed
 286                          * while doing this.
 287                          */
 288                         NFSD_LOCK();
 289                         if (nfs_numnfscbd > 0) {
 290                                 nfs_numnfscbd++;
 291                                 NFSD_UNLOCK();
 292                                 xprt = svc_vc_create_backchannel(nfscbd_pool);
 293                                 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
 294                                 NFSD_LOCK();
 295                                 nfs_numnfscbd--;
 296                                 if (nfs_numnfscbd == 0)
 297                                         wakeup(&nfs_numnfscbd);
 298                         }
 299                         NFSD_UNLOCK();
 300                 }
 301         } else {
 302                 /*
 303                  * Three cases:
 304                  * - Null RPC callback to client
 305                  * - Non-Null RPC callback to client, wait a little longer
 306                  * - upcalls to nfsuserd and gssd (clp == NULL)
 307                  */
 308                 if (callback_retry_mult == 0) {
 309                         retries = NFSV4_UPCALLRETRY;
 310                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 311                 } else {
 312                         retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
 313                 }
 314         }
 315         CLNT_CONTROL(client, CLSET_RETRIES, &retries);
 316
 317         if (nmp != NULL) {
 318                 /*
 319                  * For UDP, there are 2 timeouts:
 320                  * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
 321                  *   that does a retransmit of an RPC request using the same
 322                  *   socket and xid. This is what you normally want to do,
 323                  *   since NFS servers depend on "same xid" for their
 324                  *   Duplicate Request Cache.
 325                  * - timeout specified in CLNT_CALL_MBUF(), which specifies when
 326                  *   retransmits on the same socket should fail and a fresh
 327                  *   socket created. Each of these timeouts counts as one
 328                  *   CLSET_RETRIES as set above.
 329                  * Set the initial retransmit timeout for UDP. This timeout
 330                  * doesn't exist for TCP and the following call just fails,
 331                  * which is ok.
 332                  */
 333                 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
 334                 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
 335                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
 336         }
 337
 338         mtx_lock(&nrp->nr_mtx);
 339         if (nrp->nr_client != NULL) {
 340                 mtx_unlock(&nrp->nr_mtx);
 341                 /*
 342                  * Someone else already connected.
 343                  */
 344                 CLNT_RELEASE(client);
 345         } else {
 346                 nrp->nr_client = client;
 347                 /*
 348                  * Protocols that do not require connections may be optionally
 349                  * left unconnected for servers that reply from a port other
 350                  * than NFS_PORT.
 351                  */
 352                 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
 353                         mtx_unlock(&nrp->nr_mtx);
 354                         CLNT_CONTROL(client, CLSET_CONNECT, &one);
 355                 } else
 356                         mtx_unlock(&nrp->nr_mtx);
 357         }
 358
 359
 360         /* Restore current thread's credentials. */
 361         td->td_ucred = origcred;
 362
 363 out:
 364         NFSEXITCODE(error);
 365         return (error);
 366 }
 367
 368 /*
 369  * NFS disconnect. Clean up and unlink.
 370  */
 371 void
 372 newnfs_disconnect(struct nfssockreq *nrp)
 373 {
 374         CLIENT *client;
 375
 376         mtx_lock(&nrp->nr_mtx);
 377         if (nrp->nr_client != NULL) {
 378                 client = nrp->nr_client;
 379                 nrp->nr_client = NULL;
 380                 mtx_unlock(&nrp->nr_mtx);
 381                 rpc_gss_secpurge_call(client);
 382                 CLNT_CLOSE(client);
 383                 CLNT_RELEASE(client);
 384         } else {
 385                 mtx_unlock(&nrp->nr_mtx);
 386         }
 387 }
 388
 389 static AUTH *
 390 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
 391     char *srv_principal, gss_OID mech_oid, struct ucred *cred)
 392 {
 393         rpc_gss_service_t svc;
 394         AUTH *auth;
 395
 396         switch (secflavour) {
 397         case RPCSEC_GSS_KRB5:
 398         case RPCSEC_GSS_KRB5I:
 399         case RPCSEC_GSS_KRB5P:
 400                 if (!mech_oid) {
 401                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 402                                 return (NULL);
 403                 }
 404                 if (secflavour == RPCSEC_GSS_KRB5)
 405                         svc = rpc_gss_svc_none;
 406                 else if (secflavour == RPCSEC_GSS_KRB5I)
 407                         svc = rpc_gss_svc_integrity;
 408                 else
 409                         svc = rpc_gss_svc_privacy;
 410
 411                 if (clnt_principal == NULL)
 412                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 413                             srv_principal, mech_oid, svc);
 414                 else {
 415                         auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
 416                             clnt_principal, srv_principal, "kerberosv5",
 417                             svc, NULL, NULL, NULL);
 418                         return (auth);
 419                 }
 420                 if (auth != NULL)
 421                         return (auth);
 422                 /* fallthrough */
 423         case AUTH_SYS:
 424         default:
 425                 return (authunix_create(cred));
 426
 427         }
 428 }
 429
 430 /*
 431  * Callback from the RPC code to generate up/down notifications.
 432  */
 433
 434 struct nfs_feedback_arg {
 435         struct nfsmount *nf_mount;
 436         int             nf_lastmsg;     /* last tprintf */
 437         int             nf_tprintfmsg;
 438         struct thread   *nf_td;
 439 };
 440
 441 static void
 442 nfs_feedback(int type, int proc, void *arg)
 443 {
 444         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 445         struct nfsmount *nmp = nf->nf_mount;
 446         time_t now;
 447
 448         switch (type) {
 449         case FEEDBACK_REXMIT2:
 450         case FEEDBACK_RECONNECT:
 451                 now = NFSD_MONOSEC;
 452                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 453                         nfs_down(nmp, nf->nf_td,
 454                             "not responding", 0, NFSSTA_TIMEO);
 455                         nf->nf_tprintfmsg = TRUE;
 456                         nf->nf_lastmsg = now;
 457                 }
 458                 break;
 459
 460         case FEEDBACK_OK:
 461                 nfs_up(nf->nf_mount, nf->nf_td,
 462                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 463                 break;
 464         }
 465 }
 466
 467 /*
 468  * newnfs_request - goes something like this
 469  *      - does the rpc by calling the krpc layer
 470  *      - break down rpc header and return with nfs reply
 471  * nb: always frees up nd_mreq mbuf list
 472  */
 473 int
 474 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 475     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 476     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 477     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
 478 {
 479         u_int32_t retseq, retval, *tl;
 480         time_t waituntil;
 481         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 482         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 483         int freeslot, timeo;
 484         u_int16_t procnum;
 485         u_int trylater_delay = 1;
 486         struct nfs_feedback_arg nf;
 487         struct timeval timo;
 488         AUTH *auth;
 489         struct rpc_callextra ext;
 490         enum clnt_stat stat;
 491         struct nfsreq *rep = NULL;
 492         char *srv_principal = NULL, *clnt_principal = NULL;
 493         sigset_t oldset;
 494         struct ucred *authcred;
 495
 496         if (xidp != NULL)
 497                 *xidp = 0;
 498         /* Reject requests while attempting a forced unmount. */
 499         if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
 500                 m_freem(nd->nd_mreq);
 501                 return (ESTALE);
 502         }
 503
 504         /*
 505          * Set authcred, which is used to acquire RPC credentials to
 506          * the cred argument, by default. The crhold() should not be
 507          * necessary, but will ensure that some future code change
 508          * doesn't result in the credential being free'd prematurely.
 509          */
 510         authcred = crhold(cred);
 511
 512         /* For client side interruptible mounts, mask off the signals. */
 513         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 514                 newnfs_set_sigmask(td, &oldset);
 515                 set_sigset = 1;
 516         }
 517
 518         /*
 519          * XXX if not already connected call nfs_connect now. Longer
 520          * term, change nfs_mount to call nfs_connect unconditionally
 521          * and let clnt_reconnect_create handle reconnects.
 522          */
 523         if (nrp->nr_client == NULL)
 524                 newnfs_connect(nmp, nrp, cred, td, 0);
 525
 526         /*
 527          * For a client side mount, nmp is != NULL and clp == NULL. For
 528          * server calls (callbacks or upcalls), nmp == NULL.
 529          */
 530         if (clp != NULL) {
 531                 NFSLOCKSTATE();
 532                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 533                         secflavour = RPCSEC_GSS_KRB5;
 534                         if (nd->nd_procnum != NFSPROC_NULL) {
 535                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 536                                         secflavour = RPCSEC_GSS_KRB5I;
 537                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 538                                         secflavour = RPCSEC_GSS_KRB5P;
 539                         }
 540                 }
 541                 NFSUNLOCKSTATE();
 542         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 543              nd->nd_procnum != NFSPROC_NULL) {
 544                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 545                         nd->nd_flag |= ND_USEGSSNAME;
 546                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 547                         /*
 548                          * If there is a client side host based credential,
 549                          * use that, otherwise use the system uid, if set.
 550                          * The system uid is in the nmp->nm_sockreq.nr_cred
 551                          * credentials.
 552                          */
 553                         if (nmp->nm_krbnamelen > 0) {
 554                                 usegssname = 1;
 555                                 clnt_principal = nmp->nm_krbname;
 556                         } else if (nmp->nm_uid != (uid_t)-1) {
 557                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 558                                     ("newnfs_request: NULL nr_cred"));
 559                                 crfree(authcred);
 560                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 561                         }
 562                 } else if (nmp->nm_krbnamelen == 0 &&
 563                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 564                         /*
 565                          * If there is no host based principal name and
 566                          * the system uid is set and this is root, use the
 567                          * system uid, since root won't have user
 568                          * credentials in a credentials cache file.
 569                          * The system uid is in the nmp->nm_sockreq.nr_cred
 570                          * credentials.
 571                          */
 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                 if (NFSHASINTEGRITY(nmp))
 578                         secflavour = RPCSEC_GSS_KRB5I;
 579                 else if (NFSHASPRIVACY(nmp))
 580                         secflavour = RPCSEC_GSS_KRB5P;
 581                 else
 582                         secflavour = RPCSEC_GSS_KRB5;
 583                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 584         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 585             nd->nd_procnum != NFSPROC_NULL &&
 586             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 587                 /*
 588                  * Use the uid that did the mount when the RPC is doing
 589                  * NFSv4 system operations, as indicated by the
 590                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 591                  * The credentials in nm_sockreq.nr_cred were used for the
 592                  * mount.
 593                  */
 594                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 595                     ("newnfs_request: NULL nr_cred"));
 596                 crfree(authcred);
 597                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 598         }
 599
 600         if (nmp != NULL) {
 601                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 602                 nf.nf_mount = nmp;
 603                 nf.nf_td = td;
 604                 nf.nf_lastmsg = NFSD_MONOSEC -
 605                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 606         }
 607
 608         if (nd->nd_procnum == NFSPROC_NULL)
 609                 auth = authnone_create();
 610         else if (usegssname) {
 611                 /*
 612                  * For this case, the authenticator is held in the
 613                  * nfssockreq structure, so don't release the reference count
 614                  * held on it. --> Don't AUTH_DESTROY() it in this function.
 615                  */
 616                 if (nrp->nr_auth == NULL)
 617                         nrp->nr_auth = nfs_getauth(nrp, secflavour,
 618                             clnt_principal, srv_principal, NULL, authcred);
 619                 else
 620                         rpc_gss_refresh_auth_call(nrp->nr_auth);
 621                 auth = nrp->nr_auth;
 622         } else
 623                 auth = nfs_getauth(nrp, secflavour, NULL,
 624                     srv_principal, NULL, authcred);
 625         crfree(authcred);
 626         if (auth == NULL) {
 627                 m_freem(nd->nd_mreq);
 628                 if (set_sigset)
 629                         newnfs_restore_sigmask(td, &oldset);
 630                 return (EACCES);
 631         }
 632         bzero(&ext, sizeof(ext));
 633         ext.rc_auth = auth;
 634         if (nmp != NULL) {
 635                 ext.rc_feedback = nfs_feedback;
 636                 ext.rc_feedback_arg = &nf;
 637         }
 638
 639         procnum = nd->nd_procnum;
 640         if ((nd->nd_flag & ND_NFSV4) &&
 641             nd->nd_procnum != NFSPROC_NULL &&
 642             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 643                 procnum = NFSV4PROC_COMPOUND;
 644
 645         if (nmp != NULL) {
 646                 NFSINCRGLOBAL(newnfsstats.rpcrequests);
 647
 648                 /* Map the procnum to the old NFSv2 one, as required. */
 649                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 650                         if (nd->nd_procnum < NFS_V3NPROCS)
 651                                 procnum = nfsv2_procid[nd->nd_procnum];
 652                         else
 653                                 procnum = NFSV2PROC_NOOP;
 654                 }
 655
 656                 /*
 657                  * Now only used for the R_DONTRECOVER case, but until that is
 658                  * supported within the krpc code, I need to keep a queue of
 659                  * outstanding RPCs for nfsv4 client requests.
 660                  */
 661                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 662                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 663                             M_NFSDREQ, M_WAITOK);
 664 #ifdef KDTRACE_HOOKS
 665                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 666                         uint32_t probe_id;
 667                         int probe_procnum;
 668
 669                         if (nd->nd_flag & ND_NFSV4) {
 670                                 probe_id =
 671                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 672                                 probe_procnum = nd->nd_procnum;
 673                         } else if (nd->nd_flag & ND_NFSV3) {
 674                                 probe_id = nfscl_nfs3_start_probes[procnum];
 675                                 probe_procnum = procnum;
 676                         } else {
 677                                 probe_id =
 678                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 679                                 probe_procnum = procnum;
 680                         }
 681                         if (probe_id != 0)
 682                                 (dtrace_nfscl_nfs234_start_probe)
 683                                     (probe_id, vp, nd->nd_mreq, cred,
 684                                      probe_procnum);
 685                 }
 686 #endif
 687         }
 688         trycnt = 0;
 689         freeslot = -1;          /* Set to slot that needs to be free'd */
 690 tryagain:
 691         slot = -1;              /* Slot that needs a sequence# increment. */
 692         /*
 693          * This timeout specifies when a new socket should be created,
 694          * along with new xid values. For UDP, this should be done
 695          * infrequently, since retransmits of RPC requests should normally
 696          * use the same xid.
 697          */
 698         if (nmp == NULL) {
 699                 timo.tv_usec = 0;
 700                 if (clp == NULL)
 701                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 702                 else
 703                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 704         } else {
 705                 if (nrp->nr_sotype != SOCK_DGRAM) {
 706                         timo.tv_usec = 0;
 707                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 708                                 timo.tv_sec = INT_MAX;
 709                         else
 710                                 timo.tv_sec = NFS_TCPTIMEO;
 711                 } else {
 712                         if (NFSHASSOFT(nmp)) {
 713                                 /*
 714                                  * CLSET_RETRIES is set to 2, so this should be
 715                                  * half of the total timeout required.
 716                                  */
 717                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 718                                 if (timeo < 1)
 719                                         timeo = 1;
 720                                 timo.tv_sec = timeo / NFS_HZ;
 721                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 722                                     NFS_HZ;
 723                         } else {
 724                                 /* For UDP hard mounts, use a large value. */
 725                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 726                                 timo.tv_usec = 0;
 727                         }
 728                 }
 729
 730                 if (rep != NULL) {
 731                         rep->r_flags = 0;
 732                         rep->r_nmp = nmp;
 733                         /*
 734                          * Chain request into list of outstanding requests.
 735                          */
 736                         NFSLOCKREQ();
 737                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 738                         NFSUNLOCKREQ();
 739                 }
 740         }
 741
 742         nd->nd_mrep = NULL;
 743         if (clp != NULL && sep != NULL)
 744                 stat = clnt_bck_call(nrp->nr_client, &ext, procnum,
 745                     nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt);
 746         else
 747                 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum,
 748                     nd->nd_mreq, &nd->nd_mrep, timo);
 749
 750         if (rep != NULL) {
 751                 /*
 752                  * RPC done, unlink the request.
 753                  */
 754                 NFSLOCKREQ();
 755                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 756                 NFSUNLOCKREQ();
 757         }
 758
 759         /*
 760          * If there was a successful reply and a tprintf msg.
 761          * tprintf a response.
 762          */
 763         if (stat == RPC_SUCCESS) {
 764                 error = 0;
 765         } else if (stat == RPC_TIMEDOUT) {
 766                 NFSINCRGLOBAL(newnfsstats.rpctimeouts);
 767                 error = ETIMEDOUT;
 768         } else if (stat == RPC_VERSMISMATCH) {
 769                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 770                 error = EOPNOTSUPP;
 771         } else if (stat == RPC_PROGVERSMISMATCH) {
 772                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 773                 error = EPROTONOSUPPORT;
 774         } else if (stat == RPC_INTR) {
 775                 error = EINTR;
 776         } else {
 777                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 778                 error = EACCES;
 779         }
 780         if (error) {
 781                 m_freem(nd->nd_mreq);
 782                 if (usegssname == 0)
 783                         AUTH_DESTROY(auth);
 784                 if (rep != NULL)
 785                         FREE((caddr_t)rep, M_NFSDREQ);
 786                 if (set_sigset)
 787                         newnfs_restore_sigmask(td, &oldset);
 788                 return (error);
 789         }
 790
 791         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 792
 793         /*
 794          * Search for any mbufs that are not a multiple of 4 bytes long
 795          * or with m_data not longword aligned.
 796          * These could cause pointer alignment problems, so copy them to
 797          * well aligned mbufs.
 798          */
 799         newnfs_realign(&nd->nd_mrep, M_WAITOK);
 800         nd->nd_md = nd->nd_mrep;
 801         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 802         nd->nd_repstat = 0;
 803         if (nd->nd_procnum != NFSPROC_NULL &&
 804             nd->nd_procnum != NFSV4PROC_CBNULL) {
 805                 /* If sep == NULL, set it to the default in nmp. */
 806                 if (sep == NULL && nmp != NULL)
 807                         sep = NFSMNT_MDSSESSION(nmp);
 808                 /*
 809                  * and now the actual NFS xdr.
 810                  */
 811                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 812                 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 813                 if (nd->nd_repstat >= 10000)
 814                         NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
 815                             (int)nd->nd_repstat);
 816
 817                 /*
 818                  * Get rid of the tag, return count and SEQUENCE result for
 819                  * NFSv4.
 820                  */
 821                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 822                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 823                         i = fxdr_unsigned(int, *tl);
 824                         error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
 825                         if (error)
 826                                 goto nfsmout;
 827                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 828                         opcnt = fxdr_unsigned(int, *tl++);
 829                         i = fxdr_unsigned(int, *tl++);
 830                         j = fxdr_unsigned(int, *tl);
 831                         if (j >= 10000)
 832                                 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
 833                         /*
 834                          * If the first op is Sequence, free up the slot.
 835                          */
 836                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) ||
 837                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0))
 838                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 839                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) ||
 840                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0)
 841                             ) {
 842                                 if (i == NFSV4OP_SEQUENCE)
 843                                         NFSM_DISSECT(tl, uint32_t *,
 844                                             NFSX_V4SESSIONID +
 845                                             5 * NFSX_UNSIGNED);
 846                                 else
 847                                         NFSM_DISSECT(tl, uint32_t *,
 848                                             NFSX_V4SESSIONID +
 849                                             4 * NFSX_UNSIGNED);
 850                                 mtx_lock(&sep->nfsess_mtx);
 851                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 852                                 retseq = fxdr_unsigned(uint32_t, *tl++);
 853                                 slot = fxdr_unsigned(int, *tl++);
 854                                 freeslot = slot;
 855                                 if (retseq != sep->nfsess_slotseq[slot])
 856                                         printf("retseq diff 0x%x\n", retseq);
 857                                 retval = fxdr_unsigned(uint32_t, *++tl);
 858                                 if ((retval + 1) < sep->nfsess_foreslots)
 859                                         sep->nfsess_foreslots = (retval + 1);
 860                                 else if ((retval + 1) > sep->nfsess_foreslots)
 861                                         sep->nfsess_foreslots = (retval < 64) ?
 862                                             (retval + 1) : 64;
 863                                 mtx_unlock(&sep->nfsess_mtx);
 864
 865                                 /* Grab the op and status for the next one. */
 866                                 if (opcnt > 1) {
 867                                         NFSM_DISSECT(tl, uint32_t *,
 868                                             2 * NFSX_UNSIGNED);
 869                                         i = fxdr_unsigned(int, *tl++);
 870                                         j = fxdr_unsigned(int, *tl);
 871                                 }
 872                         }
 873                 }
 874                 if (nd->nd_repstat != 0) {
 875                         if (((nd->nd_repstat == NFSERR_DELAY ||
 876                               nd->nd_repstat == NFSERR_GRACE) &&
 877                              (nd->nd_flag & ND_NFSV4) &&
 878                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 879                              nd->nd_procnum != NFSPROC_SETATTR &&
 880                              nd->nd_procnum != NFSPROC_READ &&
 881                              nd->nd_procnum != NFSPROC_READDS &&
 882                              nd->nd_procnum != NFSPROC_WRITE &&
 883                              nd->nd_procnum != NFSPROC_WRITEDS &&
 884                              nd->nd_procnum != NFSPROC_OPEN &&
 885                              nd->nd_procnum != NFSPROC_CREATE &&
 886                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 887                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 888                              nd->nd_procnum != NFSPROC_CLOSE &&
 889                              nd->nd_procnum != NFSPROC_LOCK &&
 890                              nd->nd_procnum != NFSPROC_LOCKU) ||
 891                             (nd->nd_repstat == NFSERR_DELAY &&
 892                              (nd->nd_flag & ND_NFSV4) == 0) ||
 893                             nd->nd_repstat == NFSERR_RESOURCE) {
 894                                 if (trylater_delay > NFS_TRYLATERDEL)
 895                                         trylater_delay = NFS_TRYLATERDEL;
 896                                 waituntil = NFSD_MONOSEC + trylater_delay;
 897                                 while (NFSD_MONOSEC < waituntil)
 898                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 899                                 trylater_delay *= 2;
 900                                 if (slot != -1) {
 901                                         mtx_lock(&sep->nfsess_mtx);
 902                                         sep->nfsess_slotseq[slot]++;
 903                                         *nd->nd_slotseq = txdr_unsigned(
 904                                             sep->nfsess_slotseq[slot]);
 905                                         mtx_unlock(&sep->nfsess_mtx);
 906                                 }
 907                                 m_freem(nd->nd_mrep);
 908                                 nd->nd_mrep = NULL;
 909                                 goto tryagain;
 910                         }
 911
 912                         /*
 913                          * If the File Handle was stale, invalidate the
 914                          * lookup cache, just in case.
 915                          * (vp != NULL implies a client side call)
 916                          */
 917                         if (nd->nd_repstat == ESTALE && vp != NULL) {
 918                                 cache_purge(vp);
 919                                 if (ncl_call_invalcaches != NULL)
 920                                         (*ncl_call_invalcaches)(vp);
 921                         }
 922                 }
 923                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 924                         /* Free the slot, as required. */
 925                         if (freeslot != -1)
 926                                 nfsv4_freeslot(sep, freeslot);
 927                         /*
 928                          * If this op is Putfh, throw its results away.
 929                          */
 930                         if (j >= 10000)
 931                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
 932                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
 933                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
 934                                 i = fxdr_unsigned(int, *tl++);
 935                                 j = fxdr_unsigned(int, *tl);
 936                                 if (j >= 10000)
 937                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
 938                                             j);
 939                                 /*
 940                                  * All Compounds that do an Op that must
 941                                  * be in sequence consist of NFSV4OP_PUTFH
 942                                  * followed by one of these. As such, we
 943                                  * can determine if the seqid# should be
 944                                  * incremented, here.
 945                                  */
 946                                 if ((i == NFSV4OP_OPEN ||
 947                                      i == NFSV4OP_OPENCONFIRM ||
 948                                      i == NFSV4OP_OPENDOWNGRADE ||
 949                                      i == NFSV4OP_CLOSE ||
 950                                      i == NFSV4OP_LOCK ||
 951                                      i == NFSV4OP_LOCKU) &&
 952                                     (j == 0 ||
 953                                      (j != NFSERR_STALECLIENTID &&
 954                                       j != NFSERR_STALESTATEID &&
 955                                       j != NFSERR_BADSTATEID &&
 956                                       j != NFSERR_BADSEQID &&
 957                                       j != NFSERR_BADXDR &&
 958                                       j != NFSERR_RESOURCE &&
 959                                       j != NFSERR_NOFILEHANDLE)))
 960                                         nd->nd_flag |= ND_INCRSEQID;
 961                         }
 962                         /*
 963                          * If this op's status is non-zero, mark
 964                          * that there is no more data to process.
 965                          */
 966                         if (j)
 967                                 nd->nd_flag |= ND_NOMOREDATA;
 968
 969                         /*
 970                          * If R_DONTRECOVER is set, replace the stale error
 971                          * reply, so that recovery isn't initiated.
 972                          */
 973                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
 974                              nd->nd_repstat == NFSERR_BADSESSION ||
 975                              nd->nd_repstat == NFSERR_STALESTATEID) &&
 976                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
 977                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
 978                 }
 979         }
 980
 981 #ifdef KDTRACE_HOOKS
 982         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
 983                 uint32_t probe_id;
 984                 int probe_procnum;
 985
 986                 if (nd->nd_flag & ND_NFSV4) {
 987                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
 988                         probe_procnum = nd->nd_procnum;
 989                 } else if (nd->nd_flag & ND_NFSV3) {
 990                         probe_id = nfscl_nfs3_done_probes[procnum];
 991                         probe_procnum = procnum;
 992                 } else {
 993                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
 994                         probe_procnum = procnum;
 995                 }
 996                 if (probe_id != 0)
 997                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
 998                             nd->nd_mreq, cred, probe_procnum, 0);
 999         }
1000 #endif
1001
1002         m_freem(nd->nd_mreq);
1003         if (usegssname == 0)
1004                 AUTH_DESTROY(auth);
1005         if (rep != NULL)
1006                 FREE((caddr_t)rep, M_NFSDREQ);
1007         if (set_sigset)
1008                 newnfs_restore_sigmask(td, &oldset);
1009         return (0);
1010 nfsmout:
1011         mbuf_freem(nd->nd_mrep);
1012         mbuf_freem(nd->nd_mreq);
1013         if (usegssname == 0)
1014                 AUTH_DESTROY(auth);
1015         if (rep != NULL)
1016                 FREE((caddr_t)rep, M_NFSDREQ);
1017         if (set_sigset)
1018                 newnfs_restore_sigmask(td, &oldset);
1019         return (error);
1020 }
1021
1022 /*
1023  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1024  * wait for all requests to complete. This is used by forced unmounts
1025  * to terminate any outstanding RPCs.
1026  */
1027 int
1028 newnfs_nmcancelreqs(struct nfsmount *nmp)
1029 {
1030
1031         if (nmp->nm_sockreq.nr_client != NULL)
1032                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1033         return (0);
1034 }
1035
1036 /*
1037  * Any signal that can interrupt an NFS operation in an intr mount
1038  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1039  */
1040 int newnfs_sig_set[] = {
1041         SIGINT,
1042         SIGTERM,
1043         SIGHUP,
1044         SIGKILL,
1045         SIGQUIT
1046 };
1047
1048 /*
1049  * Check to see if one of the signals in our subset is pending on
1050  * the process (in an intr mount).
1051  */
1052 static int
1053 nfs_sig_pending(sigset_t set)
1054 {
1055         int i;
1056
1057         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
1058                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1059                         return (1);
1060         return (0);
1061 }
1062
1063 /*
1064  * The set/restore sigmask functions are used to (temporarily) overwrite
1065  * the thread td_sigmask during an RPC call (for example). These are also
1066  * used in other places in the NFS client that might tsleep().
1067  */
1068 void
1069 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1070 {
1071         sigset_t newset;
1072         int i;
1073         struct proc *p;
1074
1075         SIGFILLSET(newset);
1076         if (td == NULL)
1077                 td = curthread; /* XXX */
1078         p = td->td_proc;
1079         /* Remove the NFS set of signals from newset */
1080         PROC_LOCK(p);
1081         mtx_lock(&p->p_sigacts->ps_mtx);
1082         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
1083                 /*
1084                  * But make sure we leave the ones already masked
1085                  * by the process, ie. remove the signal from the
1086                  * temporary signalmask only if it wasn't already
1087                  * in p_sigmask.
1088                  */
1089                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1090                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1091                         SIGDELSET(newset, newnfs_sig_set[i]);
1092         }
1093         mtx_unlock(&p->p_sigacts->ps_mtx);
1094         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1095             SIGPROCMASK_PROC_LOCKED);
1096         PROC_UNLOCK(p);
1097 }
1098
1099 void
1100 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1101 {
1102         if (td == NULL)
1103                 td = curthread; /* XXX */
1104         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1105 }
1106
1107 /*
1108  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1109  * old one after msleep() returns.
1110  */
1111 int
1112 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1113 {
1114         sigset_t oldset;
1115         int error;
1116         struct proc *p;
1117
1118         if ((priority & PCATCH) == 0)
1119                 return msleep(ident, mtx, priority, wmesg, timo);
1120         if (td == NULL)
1121                 td = curthread; /* XXX */
1122         newnfs_set_sigmask(td, &oldset);
1123         error = msleep(ident, mtx, priority, wmesg, timo);
1124         newnfs_restore_sigmask(td, &oldset);
1125         p = td->td_proc;
1126         return (error);
1127 }
1128
1129 /*
1130  * Test for a termination condition pending on the process.
1131  * This is used for NFSMNT_INT mounts.
1132  */
1133 int
1134 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1135 {
1136         struct proc *p;
1137         sigset_t tmpset;
1138
1139         /* Terminate all requests while attempting a forced unmount. */
1140         if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1141                 return (EIO);
1142         if (!(nmp->nm_flag & NFSMNT_INT))
1143                 return (0);
1144         if (td == NULL)
1145                 return (0);
1146         p = td->td_proc;
1147         PROC_LOCK(p);
1148         tmpset = p->p_siglist;
1149         SIGSETOR(tmpset, td->td_siglist);
1150         SIGSETNAND(tmpset, td->td_sigmask);
1151         mtx_lock(&p->p_sigacts->ps_mtx);
1152         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1153         mtx_unlock(&p->p_sigacts->ps_mtx);
1154         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1155             && nfs_sig_pending(tmpset)) {
1156                 PROC_UNLOCK(p);
1157                 return (EINTR);
1158         }
1159         PROC_UNLOCK(p);
1160         return (0);
1161 }
1162
1163 static int
1164 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1165 {
1166         struct proc *p;
1167
1168         p = td ? td->td_proc : NULL;
1169         if (error) {
1170                 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
1171                     server, msg, error);
1172         } else {
1173                 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
1174         }
1175         return (0);
1176 }
1177
1178 static void
1179 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1180     int error, int flags)
1181 {
1182         if (nmp == NULL)
1183                 return;
1184         mtx_lock(&nmp->nm_mtx);
1185         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1186                 nmp->nm_state |= NFSSTA_TIMEO;
1187                 mtx_unlock(&nmp->nm_mtx);
1188                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1189                     VQ_NOTRESP, 0);
1190         } else
1191                 mtx_unlock(&nmp->nm_mtx);
1192         mtx_lock(&nmp->nm_mtx);
1193         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1194                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1195                 mtx_unlock(&nmp->nm_mtx);
1196                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1197                     VQ_NOTRESPLOCK, 0);
1198         } else
1199                 mtx_unlock(&nmp->nm_mtx);
1200         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1201 }
1202
1203 static void
1204 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1205     int flags, int tprintfmsg)
1206 {
1207         if (nmp == NULL)
1208                 return;
1209         if (tprintfmsg) {
1210                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1211         }
1212
1213         mtx_lock(&nmp->nm_mtx);
1214         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1215                 nmp->nm_state &= ~NFSSTA_TIMEO;
1216                 mtx_unlock(&nmp->nm_mtx);
1217                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1218                     VQ_NOTRESP, 1);
1219         } else
1220                 mtx_unlock(&nmp->nm_mtx);
1221
1222         mtx_lock(&nmp->nm_mtx);
1223         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1224                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1225                 mtx_unlock(&nmp->nm_mtx);
1226                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1227                     VQ_NOTRESPLOCK, 1);
1228         } else
1229                 mtx_unlock(&nmp->nm_mtx);
1230 }
1231