sys/fs/nfs/nfs_commonkrpc.c

   1 /*-
   2  * Copyright (c) 1989, 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 /*
  38  * Socket operations for use by nfs
  39  */
  40
  41 #include "opt_kgssapi.h"
  42 #include "opt_nfs.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/limits.h>
  48 #include <sys/lock.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mbuf.h>
  51 #include <sys/mount.h>
  52 #include <sys/mutex.h>
  53 #include <sys/proc.h>
  54 #include <sys/signalvar.h>
  55 #include <sys/syscallsubr.h>
  56 #include <sys/sysctl.h>
  57 #include <sys/syslog.h>
  58 #include <sys/vnode.h>
  59
  60 #include <rpc/rpc.h>
  61 #include <rpc/krpc.h>
  62
  63 #include <kgssapi/krb5/kcrypto.h>
  64
  65 #include <fs/nfs/nfsport.h>
  66
  67 #ifdef KDTRACE_HOOKS
  68 #include <sys/dtrace_bsd.h>
  69
  70 dtrace_nfsclient_nfs23_start_probe_func_t
  71                 dtrace_nfscl_nfs234_start_probe;
  72
  73 dtrace_nfsclient_nfs23_done_probe_func_t
  74                 dtrace_nfscl_nfs234_done_probe;
  75
  76 /*
  77  * Registered probes by RPC type.
  78  */
  79 uint32_t        nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
  80 uint32_t        nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
  81
  82 uint32_t        nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
  83 uint32_t        nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
  84
  85 uint32_t        nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
  86 uint32_t        nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
  87 #endif
  88
  89 NFSSTATESPINLOCK;
  90 NFSREQSPINLOCK;
  91 NFSDLOCKMUTEX;
  92 NFSCLSTATEMUTEX;
  93 extern struct nfsstatsv1 nfsstatsv1;
  94 extern struct nfsreqhead nfsd_reqq;
  95 extern int nfscl_ticks;
  96 extern void (*ncl_call_invalcaches)(struct vnode *);
  97 extern int nfs_numnfscbd;
  98 extern int nfscl_debuglevel;
  99
 100 SVCPOOL         *nfscbd_pool;
 101 static int      nfsrv_gsscallbackson = 0;
 102 static int      nfs_bufpackets = 4;
 103 static int      nfs_reconnects;
 104 static int      nfs3_jukebox_delay = 10;
 105 static int      nfs_skip_wcc_data_onerr = 1;
 106
 107 SYSCTL_DECL(_vfs_nfs);
 108
 109 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
 110     "Buffer reservation size 2 < x < 64");
 111 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
 112     "Number of times the nfs client has had to reconnect");
 113 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
 114     "Number of seconds to delay a retry after receiving EJUKEBOX");
 115 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
 116     "Disable weak cache consistency checking when server returns an error");
 117
 118 static void     nfs_down(struct nfsmount *, struct thread *, const char *,
 119     int, int);
 120 static void     nfs_up(struct nfsmount *, struct thread *, const char *,
 121     int, int);
 122 static int      nfs_msg(struct thread *, const char *, const char *, int);
 123
 124 struct nfs_cached_auth {
 125         int             ca_refs; /* refcount, including 1 from the cache */
 126         uid_t           ca_uid;  /* uid that corresponds to this auth */
 127         AUTH            *ca_auth; /* RPC auth handle */
 128 };
 129
 130 static int nfsv2_procid[NFS_V3NPROCS] = {
 131         NFSV2PROC_NULL,
 132         NFSV2PROC_GETATTR,
 133         NFSV2PROC_SETATTR,
 134         NFSV2PROC_LOOKUP,
 135         NFSV2PROC_NOOP,
 136         NFSV2PROC_READLINK,
 137         NFSV2PROC_READ,
 138         NFSV2PROC_WRITE,
 139         NFSV2PROC_CREATE,
 140         NFSV2PROC_MKDIR,
 141         NFSV2PROC_SYMLINK,
 142         NFSV2PROC_CREATE,
 143         NFSV2PROC_REMOVE,
 144         NFSV2PROC_RMDIR,
 145         NFSV2PROC_RENAME,
 146         NFSV2PROC_LINK,
 147         NFSV2PROC_READDIR,
 148         NFSV2PROC_NOOP,
 149         NFSV2PROC_STATFS,
 150         NFSV2PROC_NOOP,
 151         NFSV2PROC_NOOP,
 152         NFSV2PROC_NOOP,
 153 };
 154
 155 /*
 156  * Initialize sockets and congestion for a new NFS connection.
 157  * We do not free the sockaddr if error.
 158  */
 159 int
 160 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
 161     struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
 162 {
 163         int rcvreserve, sndreserve;
 164         int pktscale;
 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, "nfsreq");
 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                 /* cred == NULL for DS connects. */
 284                 if (NFSHASNFSV4N(nmp) && cred != NULL) {
 285                         /*
 286                          * Make sure the nfscbd_pool doesn't get destroyed
 287                          * while doing this.
 288                          */
 289                         NFSD_LOCK();
 290                         if (nfs_numnfscbd > 0) {
 291                                 nfs_numnfscbd++;
 292                                 NFSD_UNLOCK();
 293                                 xprt = svc_vc_create_backchannel(nfscbd_pool);
 294                                 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
 295                                 NFSD_LOCK();
 296                                 nfs_numnfscbd--;
 297                                 if (nfs_numnfscbd == 0)
 298                                         wakeup(&nfs_numnfscbd);
 299                         }
 300                         NFSD_UNLOCK();
 301                 }
 302         } else {
 303                 /*
 304                  * Three cases:
 305                  * - Null RPC callback to client
 306                  * - Non-Null RPC callback to client, wait a little longer
 307                  * - upcalls to nfsuserd and gssd (clp == NULL)
 308                  */
 309                 if (callback_retry_mult == 0) {
 310                         retries = NFSV4_UPCALLRETRY;
 311                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 312                 } else {
 313                         retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
 314                 }
 315         }
 316         CLNT_CONTROL(client, CLSET_RETRIES, &retries);
 317
 318         if (nmp != NULL) {
 319                 /*
 320                  * For UDP, there are 2 timeouts:
 321                  * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
 322                  *   that does a retransmit of an RPC request using the same
 323                  *   socket and xid. This is what you normally want to do,
 324                  *   since NFS servers depend on "same xid" for their
 325                  *   Duplicate Request Cache.
 326                  * - timeout specified in CLNT_CALL_MBUF(), which specifies when
 327                  *   retransmits on the same socket should fail and a fresh
 328                  *   socket created. Each of these timeouts counts as one
 329                  *   CLSET_RETRIES as set above.
 330                  * Set the initial retransmit timeout for UDP. This timeout
 331                  * doesn't exist for TCP and the following call just fails,
 332                  * which is ok.
 333                  */
 334                 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
 335                 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
 336                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
 337         }
 338
 339         mtx_lock(&nrp->nr_mtx);
 340         if (nrp->nr_client != NULL) {
 341                 mtx_unlock(&nrp->nr_mtx);
 342                 /*
 343                  * Someone else already connected.
 344                  */
 345                 CLNT_RELEASE(client);
 346         } else {
 347                 nrp->nr_client = client;
 348                 /*
 349                  * Protocols that do not require connections may be optionally
 350                  * left unconnected for servers that reply from a port other
 351                  * than NFS_PORT.
 352                  */
 353                 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
 354                         mtx_unlock(&nrp->nr_mtx);
 355                         CLNT_CONTROL(client, CLSET_CONNECT, &one);
 356                 } else
 357                         mtx_unlock(&nrp->nr_mtx);
 358         }
 359
 360
 361         /* Restore current thread's credentials. */
 362         td->td_ucred = origcred;
 363
 364 out:
 365         NFSEXITCODE(error);
 366         return (error);
 367 }
 368
 369 /*
 370  * NFS disconnect. Clean up and unlink.
 371  */
 372 void
 373 newnfs_disconnect(struct nfssockreq *nrp)
 374 {
 375         CLIENT *client;
 376
 377         mtx_lock(&nrp->nr_mtx);
 378         if (nrp->nr_client != NULL) {
 379                 client = nrp->nr_client;
 380                 nrp->nr_client = NULL;
 381                 mtx_unlock(&nrp->nr_mtx);
 382                 rpc_gss_secpurge_call(client);
 383                 CLNT_CLOSE(client);
 384                 CLNT_RELEASE(client);
 385         } else {
 386                 mtx_unlock(&nrp->nr_mtx);
 387         }
 388 }
 389
 390 static AUTH *
 391 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
 392     char *srv_principal, gss_OID mech_oid, struct ucred *cred)
 393 {
 394         rpc_gss_service_t svc;
 395         AUTH *auth;
 396
 397         switch (secflavour) {
 398         case RPCSEC_GSS_KRB5:
 399         case RPCSEC_GSS_KRB5I:
 400         case RPCSEC_GSS_KRB5P:
 401                 if (!mech_oid) {
 402                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 403                                 return (NULL);
 404                 }
 405                 if (secflavour == RPCSEC_GSS_KRB5)
 406                         svc = rpc_gss_svc_none;
 407                 else if (secflavour == RPCSEC_GSS_KRB5I)
 408                         svc = rpc_gss_svc_integrity;
 409                 else
 410                         svc = rpc_gss_svc_privacy;
 411
 412                 if (clnt_principal == NULL)
 413                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 414                             srv_principal, mech_oid, svc);
 415                 else {
 416                         auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
 417                             clnt_principal, srv_principal, "kerberosv5",
 418                             svc, NULL, NULL, NULL);
 419                         return (auth);
 420                 }
 421                 if (auth != NULL)
 422                         return (auth);
 423                 /* fallthrough */
 424         case AUTH_SYS:
 425         default:
 426                 return (authunix_create(cred));
 427
 428         }
 429 }
 430
 431 /*
 432  * Callback from the RPC code to generate up/down notifications.
 433  */
 434
 435 struct nfs_feedback_arg {
 436         struct nfsmount *nf_mount;
 437         int             nf_lastmsg;     /* last tprintf */
 438         int             nf_tprintfmsg;
 439         struct thread   *nf_td;
 440 };
 441
 442 static void
 443 nfs_feedback(int type, int proc, void *arg)
 444 {
 445         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 446         struct nfsmount *nmp = nf->nf_mount;
 447         time_t now;
 448
 449         switch (type) {
 450         case FEEDBACK_REXMIT2:
 451         case FEEDBACK_RECONNECT:
 452                 now = NFSD_MONOSEC;
 453                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 454                         nfs_down(nmp, nf->nf_td,
 455                             "not responding", 0, NFSSTA_TIMEO);
 456                         nf->nf_tprintfmsg = TRUE;
 457                         nf->nf_lastmsg = now;
 458                 }
 459                 break;
 460
 461         case FEEDBACK_OK:
 462                 nfs_up(nf->nf_mount, nf->nf_td,
 463                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 464                 break;
 465         }
 466 }
 467
 468 /*
 469  * newnfs_request - goes something like this
 470  *      - does the rpc by calling the krpc layer
 471  *      - break down rpc header and return with nfs reply
 472  * nb: always frees up nd_mreq mbuf list
 473  */
 474 int
 475 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 476     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 477     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 478     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep)
 479 {
 480         uint32_t retseq, retval, slotseq, *tl;
 481         time_t waituntil;
 482         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 483         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 484         int freeslot, maxslot, reterr, slotpos, timeo;
 485         u_int16_t procnum;
 486         u_int trylater_delay = 1;
 487         struct nfs_feedback_arg nf;
 488         struct timeval timo;
 489         AUTH *auth;
 490         struct rpc_callextra ext;
 491         enum clnt_stat stat;
 492         struct nfsreq *rep = NULL;
 493         char *srv_principal = NULL, *clnt_principal = NULL;
 494         sigset_t oldset;
 495         struct ucred *authcred;
 496         struct nfsclsession *sep;
 497         uint8_t sessionid[NFSX_V4SESSIONID];
 498
 499         sep = dssep;
 500         if (xidp != NULL)
 501                 *xidp = 0;
 502         /* Reject requests while attempting a forced unmount. */
 503         if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
 504                 m_freem(nd->nd_mreq);
 505                 return (ESTALE);
 506         }
 507
 508         /*
 509          * Set authcred, which is used to acquire RPC credentials to
 510          * the cred argument, by default. The crhold() should not be
 511          * necessary, but will ensure that some future code change
 512          * doesn't result in the credential being free'd prematurely.
 513          */
 514         authcred = crhold(cred);
 515
 516         /* For client side interruptible mounts, mask off the signals. */
 517         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 518                 newnfs_set_sigmask(td, &oldset);
 519                 set_sigset = 1;
 520         }
 521
 522         /*
 523          * XXX if not already connected call nfs_connect now. Longer
 524          * term, change nfs_mount to call nfs_connect unconditionally
 525          * and let clnt_reconnect_create handle reconnects.
 526          */
 527         if (nrp->nr_client == NULL)
 528                 newnfs_connect(nmp, nrp, cred, td, 0);
 529
 530         /*
 531          * For a client side mount, nmp is != NULL and clp == NULL. For
 532          * server calls (callbacks or upcalls), nmp == NULL.
 533          */
 534         if (clp != NULL) {
 535                 NFSLOCKSTATE();
 536                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 537                         secflavour = RPCSEC_GSS_KRB5;
 538                         if (nd->nd_procnum != NFSPROC_NULL) {
 539                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 540                                         secflavour = RPCSEC_GSS_KRB5I;
 541                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 542                                         secflavour = RPCSEC_GSS_KRB5P;
 543                         }
 544                 }
 545                 NFSUNLOCKSTATE();
 546         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 547              nd->nd_procnum != NFSPROC_NULL) {
 548                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 549                         nd->nd_flag |= ND_USEGSSNAME;
 550                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 551                         /*
 552                          * If there is a client side host based credential,
 553                          * use that, otherwise use the system uid, if set.
 554                          * The system uid is in the nmp->nm_sockreq.nr_cred
 555                          * credentials.
 556                          */
 557                         if (nmp->nm_krbnamelen > 0) {
 558                                 usegssname = 1;
 559                                 clnt_principal = nmp->nm_krbname;
 560                         } else if (nmp->nm_uid != (uid_t)-1) {
 561                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 562                                     ("newnfs_request: NULL nr_cred"));
 563                                 crfree(authcred);
 564                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 565                         }
 566                 } else if (nmp->nm_krbnamelen == 0 &&
 567                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 568                         /*
 569                          * If there is no host based principal name and
 570                          * the system uid is set and this is root, use the
 571                          * system uid, since root won't have user
 572                          * credentials in a credentials cache file.
 573                          * The system uid is in the nmp->nm_sockreq.nr_cred
 574                          * credentials.
 575                          */
 576                         KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 577                             ("newnfs_request: NULL nr_cred"));
 578                         crfree(authcred);
 579                         authcred = crhold(nmp->nm_sockreq.nr_cred);
 580                 }
 581                 if (NFSHASINTEGRITY(nmp))
 582                         secflavour = RPCSEC_GSS_KRB5I;
 583                 else if (NFSHASPRIVACY(nmp))
 584                         secflavour = RPCSEC_GSS_KRB5P;
 585                 else
 586                         secflavour = RPCSEC_GSS_KRB5;
 587                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 588         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 589             nd->nd_procnum != NFSPROC_NULL &&
 590             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 591                 /*
 592                  * Use the uid that did the mount when the RPC is doing
 593                  * NFSv4 system operations, as indicated by the
 594                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 595                  * The credentials in nm_sockreq.nr_cred were used for the
 596                  * mount.
 597                  */
 598                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 599                     ("newnfs_request: NULL nr_cred"));
 600                 crfree(authcred);
 601                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 602         }
 603
 604         if (nmp != NULL) {
 605                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 606                 nf.nf_mount = nmp;
 607                 nf.nf_td = td;
 608                 nf.nf_lastmsg = NFSD_MONOSEC -
 609                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 610         }
 611
 612         if (nd->nd_procnum == NFSPROC_NULL)
 613                 auth = authnone_create();
 614         else if (usegssname) {
 615                 /*
 616                  * For this case, the authenticator is held in the
 617                  * nfssockreq structure, so don't release the reference count
 618                  * held on it. --> Don't AUTH_DESTROY() it in this function.
 619                  */
 620                 if (nrp->nr_auth == NULL)
 621                         nrp->nr_auth = nfs_getauth(nrp, secflavour,
 622                             clnt_principal, srv_principal, NULL, authcred);
 623                 else
 624                         rpc_gss_refresh_auth_call(nrp->nr_auth);
 625                 auth = nrp->nr_auth;
 626         } else
 627                 auth = nfs_getauth(nrp, secflavour, NULL,
 628                     srv_principal, NULL, authcred);
 629         crfree(authcred);
 630         if (auth == NULL) {
 631                 m_freem(nd->nd_mreq);
 632                 if (set_sigset)
 633                         newnfs_restore_sigmask(td, &oldset);
 634                 return (EACCES);
 635         }
 636         bzero(&ext, sizeof(ext));
 637         ext.rc_auth = auth;
 638         if (nmp != NULL) {
 639                 ext.rc_feedback = nfs_feedback;
 640                 ext.rc_feedback_arg = &nf;
 641         }
 642
 643         procnum = nd->nd_procnum;
 644         if ((nd->nd_flag & ND_NFSV4) &&
 645             nd->nd_procnum != NFSPROC_NULL &&
 646             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 647                 procnum = NFSV4PROC_COMPOUND;
 648
 649         if (nmp != NULL) {
 650                 NFSINCRGLOBAL(nfsstatsv1.rpcrequests);
 651
 652                 /* Map the procnum to the old NFSv2 one, as required. */
 653                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 654                         if (nd->nd_procnum < NFS_V3NPROCS)
 655                                 procnum = nfsv2_procid[nd->nd_procnum];
 656                         else
 657                                 procnum = NFSV2PROC_NOOP;
 658                 }
 659
 660                 /*
 661                  * Now only used for the R_DONTRECOVER case, but until that is
 662                  * supported within the krpc code, I need to keep a queue of
 663                  * outstanding RPCs for nfsv4 client requests.
 664                  */
 665                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 666                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 667                             M_NFSDREQ, M_WAITOK);
 668 #ifdef KDTRACE_HOOKS
 669                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 670                         uint32_t probe_id;
 671                         int probe_procnum;
 672
 673                         if (nd->nd_flag & ND_NFSV4) {
 674                                 probe_id =
 675                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 676                                 probe_procnum = nd->nd_procnum;
 677                         } else if (nd->nd_flag & ND_NFSV3) {
 678                                 probe_id = nfscl_nfs3_start_probes[procnum];
 679                                 probe_procnum = procnum;
 680                         } else {
 681                                 probe_id =
 682                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 683                                 probe_procnum = procnum;
 684                         }
 685                         if (probe_id != 0)
 686                                 (dtrace_nfscl_nfs234_start_probe)
 687                                     (probe_id, vp, nd->nd_mreq, cred,
 688                                      probe_procnum);
 689                 }
 690 #endif
 691         }
 692         trycnt = 0;
 693         freeslot = -1;          /* Set to slot that needs to be free'd */
 694 tryagain:
 695         slot = -1;              /* Slot that needs a sequence# increment. */
 696         /*
 697          * This timeout specifies when a new socket should be created,
 698          * along with new xid values. For UDP, this should be done
 699          * infrequently, since retransmits of RPC requests should normally
 700          * use the same xid.
 701          */
 702         if (nmp == NULL) {
 703                 timo.tv_usec = 0;
 704                 if (clp == NULL)
 705                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 706                 else
 707                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 708         } else {
 709                 if (nrp->nr_sotype != SOCK_DGRAM) {
 710                         timo.tv_usec = 0;
 711                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 712                                 timo.tv_sec = INT_MAX;
 713                         else
 714                                 timo.tv_sec = NFS_TCPTIMEO;
 715                 } else {
 716                         if (NFSHASSOFT(nmp)) {
 717                                 /*
 718                                  * CLSET_RETRIES is set to 2, so this should be
 719                                  * half of the total timeout required.
 720                                  */
 721                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 722                                 if (timeo < 1)
 723                                         timeo = 1;
 724                                 timo.tv_sec = timeo / NFS_HZ;
 725                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 726                                     NFS_HZ;
 727                         } else {
 728                                 /* For UDP hard mounts, use a large value. */
 729                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 730                                 timo.tv_usec = 0;
 731                         }
 732                 }
 733
 734                 if (rep != NULL) {
 735                         rep->r_flags = 0;
 736                         rep->r_nmp = nmp;
 737                         /*
 738                          * Chain request into list of outstanding requests.
 739                          */
 740                         NFSLOCKREQ();
 741                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 742                         NFSUNLOCKREQ();
 743                 }
 744         }
 745
 746         nd->nd_mrep = NULL;
 747         if (clp != NULL && sep != NULL)
 748                 stat = clnt_bck_call(nrp->nr_client, &ext, procnum,
 749                     nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt);
 750         else
 751                 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum,
 752                     nd->nd_mreq, &nd->nd_mrep, timo);
 753
 754         if (rep != NULL) {
 755                 /*
 756                  * RPC done, unlink the request.
 757                  */
 758                 NFSLOCKREQ();
 759                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 760                 NFSUNLOCKREQ();
 761         }
 762
 763         /*
 764          * If there was a successful reply and a tprintf msg.
 765          * tprintf a response.
 766          */
 767         if (stat == RPC_SUCCESS) {
 768                 error = 0;
 769         } else if (stat == RPC_TIMEDOUT) {
 770                 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts);
 771                 error = ETIMEDOUT;
 772         } else if (stat == RPC_VERSMISMATCH) {
 773                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 774                 error = EOPNOTSUPP;
 775         } else if (stat == RPC_PROGVERSMISMATCH) {
 776                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 777                 error = EPROTONOSUPPORT;
 778         } else if (stat == RPC_INTR) {
 779                 error = EINTR;
 780         } else {
 781                 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
 782                 error = EACCES;
 783         }
 784         if (error) {
 785                 m_freem(nd->nd_mreq);
 786                 if (usegssname == 0)
 787                         AUTH_DESTROY(auth);
 788                 if (rep != NULL)
 789                         FREE((caddr_t)rep, M_NFSDREQ);
 790                 if (set_sigset)
 791                         newnfs_restore_sigmask(td, &oldset);
 792                 return (error);
 793         }
 794
 795         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 796
 797         /*
 798          * Search for any mbufs that are not a multiple of 4 bytes long
 799          * or with m_data not longword aligned.
 800          * These could cause pointer alignment problems, so copy them to
 801          * well aligned mbufs.
 802          */
 803         newnfs_realign(&nd->nd_mrep, M_WAITOK);
 804         nd->nd_md = nd->nd_mrep;
 805         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 806         nd->nd_repstat = 0;
 807         if (nd->nd_procnum != NFSPROC_NULL &&
 808             nd->nd_procnum != NFSV4PROC_CBNULL) {
 809                 /* If sep == NULL, set it to the default in nmp. */
 810                 if (sep == NULL && nmp != NULL)
 811                         sep = nfsmnt_mdssession(nmp);
 812                 /*
 813                  * and now the actual NFS xdr.
 814                  */
 815                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 816                 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 817                 if (nd->nd_repstat >= 10000)
 818                         NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
 819                             (int)nd->nd_repstat);
 820
 821                 /*
 822                  * Get rid of the tag, return count and SEQUENCE result for
 823                  * NFSv4.
 824                  */
 825                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 826                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 827                         i = fxdr_unsigned(int, *tl);
 828                         error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
 829                         if (error)
 830                                 goto nfsmout;
 831                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 832                         opcnt = fxdr_unsigned(int, *tl++);
 833                         i = fxdr_unsigned(int, *tl++);
 834                         j = fxdr_unsigned(int, *tl);
 835                         if (j >= 10000)
 836                                 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
 837                         /*
 838                          * If the first op is Sequence, free up the slot.
 839                          */
 840                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) ||
 841                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0))
 842                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 843                         if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) ||
 844                             (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0)
 845                             ) {
 846                                 if (i == NFSV4OP_SEQUENCE)
 847                                         NFSM_DISSECT(tl, uint32_t *,
 848                                             NFSX_V4SESSIONID +
 849                                             5 * NFSX_UNSIGNED);
 850                                 else
 851                                         NFSM_DISSECT(tl, uint32_t *,
 852                                             NFSX_V4SESSIONID +
 853                                             4 * NFSX_UNSIGNED);
 854                                 mtx_lock(&sep->nfsess_mtx);
 855                                 if (bcmp(tl, sep->nfsess_sessionid,
 856                                     NFSX_V4SESSIONID) == 0) {
 857                                         tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 858                                         retseq = fxdr_unsigned(uint32_t, *tl++);
 859                                         slot = fxdr_unsigned(int, *tl++);
 860                                         freeslot = slot;
 861                                         if (retseq != sep->nfsess_slotseq[slot])
 862                                                 printf("retseq diff 0x%x\n",
 863                                                     retseq);
 864                                         retval = fxdr_unsigned(uint32_t, *++tl);
 865                                         if ((retval + 1) < sep->nfsess_foreslots
 866                                             )
 867                                                 sep->nfsess_foreslots = (retval
 868                                                     + 1);
 869                                         else if ((retval + 1) >
 870                                             sep->nfsess_foreslots)
 871                                                 sep->nfsess_foreslots = (retval
 872                                                     < 64) ? (retval + 1) : 64;
 873                                 }
 874                                 mtx_unlock(&sep->nfsess_mtx);
 875
 876                                 /* Grab the op and status for the next one. */
 877                                 if (opcnt > 1) {
 878                                         NFSM_DISSECT(tl, uint32_t *,
 879                                             2 * NFSX_UNSIGNED);
 880                                         i = fxdr_unsigned(int, *tl++);
 881                                         j = fxdr_unsigned(int, *tl);
 882                                 }
 883                         }
 884                 }
 885                 if (nd->nd_repstat != 0) {
 886                         if (nd->nd_repstat == NFSERR_BADSESSION &&
 887                             nmp != NULL && dssep == NULL) {
 888                                 /*
 889                                  * If this is a client side MDS RPC, mark
 890                                  * the MDS session defunct and initiate
 891                                  * recovery, as required.
 892                                  * The nfsess_defunct field is protected by
 893                                  * the NFSLOCKMNT()/nm_mtx lock and not the
 894                                  * nfsess_mtx lock to simplify its handling,
 895                                  * for the MDS session. This lock is also
 896                                  * sufficient for nfsess_sessionid, since it
 897                                  * never changes in the structure.
 898                                  */
 899                                 NFSCL_DEBUG(1, "Got badsession\n");
 900                                 NFSLOCKCLSTATE();
 901                                 NFSLOCKMNT(nmp);
 902                                 sep = NFSMNT_MDSSESSION(nmp);
 903                                 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence,
 904                                     NFSX_V4SESSIONID) == 0) {
 905                                         /* Initiate recovery. */
 906                                         sep->nfsess_defunct = 1;
 907                                         NFSCL_DEBUG(1, "Marked defunct\n");
 908                                         if (nmp->nm_clp != NULL) {
 909                                                 nmp->nm_clp->nfsc_flags |=
 910                                                     NFSCLFLAGS_RECOVER;
 911                                                 wakeup(nmp->nm_clp);
 912                                         }
 913                                 }
 914                                 NFSUNLOCKCLSTATE();
 915                                 /*
 916                                  * Sleep for up to 1sec waiting for a new
 917                                  * session.
 918                                  */
 919                                 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO,
 920                                     "nfsbadsess", hz);
 921                                 /*
 922                                  * Get the session again, in case a new one
 923                                  * has been created during the sleep.
 924                                  */
 925                                 sep = NFSMNT_MDSSESSION(nmp);
 926                                 NFSUNLOCKMNT(nmp);
 927                                 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) {
 928                                         reterr = nfsv4_sequencelookup(nmp, sep,
 929                                             &slotpos, &maxslot, &slotseq,
 930                                             sessionid);
 931                                         if (reterr == 0) {
 932                                                 /* Fill in new session info. */
 933                                                 NFSCL_DEBUG(1,
 934                                                   "Filling in new sequence\n");
 935                                                 tl = nd->nd_sequence;
 936                                                 bcopy(sessionid, tl,
 937                                                     NFSX_V4SESSIONID);
 938                                                 tl += NFSX_V4SESSIONID /
 939                                                     NFSX_UNSIGNED;
 940                                                 *tl++ = txdr_unsigned(slotseq);
 941                                                 *tl++ = txdr_unsigned(slotpos);
 942                                                 *tl = txdr_unsigned(maxslot);
 943                                         }
 944                                         if (reterr == NFSERR_BADSESSION ||
 945                                             reterr == 0) {
 946                                                 NFSCL_DEBUG(1,
 947                                                     "Badsession looping\n");
 948                                                 m_freem(nd->nd_mrep);
 949                                                 nd->nd_mrep = NULL;
 950                                                 goto tryagain;
 951                                         }
 952                                         nd->nd_repstat = reterr;
 953                                         NFSCL_DEBUG(1, "Got err=%d\n", reterr);
 954                                 }
 955                         }
 956                         if (((nd->nd_repstat == NFSERR_DELAY ||
 957                               nd->nd_repstat == NFSERR_GRACE) &&
 958                              (nd->nd_flag & ND_NFSV4) &&
 959                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 960                              nd->nd_procnum != NFSPROC_SETATTR &&
 961                              nd->nd_procnum != NFSPROC_READ &&
 962                              nd->nd_procnum != NFSPROC_READDS &&
 963                              nd->nd_procnum != NFSPROC_WRITE &&
 964                              nd->nd_procnum != NFSPROC_WRITEDS &&
 965                              nd->nd_procnum != NFSPROC_OPEN &&
 966                              nd->nd_procnum != NFSPROC_CREATE &&
 967                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 968                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 969                              nd->nd_procnum != NFSPROC_CLOSE &&
 970                              nd->nd_procnum != NFSPROC_LOCK &&
 971                              nd->nd_procnum != NFSPROC_LOCKU) ||
 972                             (nd->nd_repstat == NFSERR_DELAY &&
 973                              (nd->nd_flag & ND_NFSV4) == 0) ||
 974                             nd->nd_repstat == NFSERR_RESOURCE) {
 975                                 if (trylater_delay > NFS_TRYLATERDEL)
 976                                         trylater_delay = NFS_TRYLATERDEL;
 977                                 waituntil = NFSD_MONOSEC + trylater_delay;
 978                                 while (NFSD_MONOSEC < waituntil)
 979                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 980                                 trylater_delay *= 2;
 981                                 if (slot != -1) {
 982                                         mtx_lock(&sep->nfsess_mtx);
 983                                         sep->nfsess_slotseq[slot]++;
 984                                         *nd->nd_slotseq = txdr_unsigned(
 985                                             sep->nfsess_slotseq[slot]);
 986                                         mtx_unlock(&sep->nfsess_mtx);
 987                                 }
 988                                 m_freem(nd->nd_mrep);
 989                                 nd->nd_mrep = NULL;
 990                                 goto tryagain;
 991                         }
 992
 993                         /*
 994                          * If the File Handle was stale, invalidate the
 995                          * lookup cache, just in case.
 996                          * (vp != NULL implies a client side call)
 997                          */
 998                         if (nd->nd_repstat == ESTALE && vp != NULL) {
 999                                 cache_purge(vp);
1000                                 if (ncl_call_invalcaches != NULL)
1001                                         (*ncl_call_invalcaches)(vp);
1002                         }
1003                 }
1004                 if ((nd->nd_flag & ND_NFSV4) != 0) {
1005                         /* Free the slot, as required. */
1006                         if (freeslot != -1)
1007                                 nfsv4_freeslot(sep, freeslot);
1008                         /*
1009                          * If this op is Putfh, throw its results away.
1010                          */
1011                         if (j >= 10000)
1012                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
1013                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
1014                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
1015                                 i = fxdr_unsigned(int, *tl++);
1016                                 j = fxdr_unsigned(int, *tl);
1017                                 if (j >= 10000)
1018                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
1019                                             j);
1020                                 /*
1021                                  * All Compounds that do an Op that must
1022                                  * be in sequence consist of NFSV4OP_PUTFH
1023                                  * followed by one of these. As such, we
1024                                  * can determine if the seqid# should be
1025                                  * incremented, here.
1026                                  */
1027                                 if ((i == NFSV4OP_OPEN ||
1028                                      i == NFSV4OP_OPENCONFIRM ||
1029                                      i == NFSV4OP_OPENDOWNGRADE ||
1030                                      i == NFSV4OP_CLOSE ||
1031                                      i == NFSV4OP_LOCK ||
1032                                      i == NFSV4OP_LOCKU) &&
1033                                     (j == 0 ||
1034                                      (j != NFSERR_STALECLIENTID &&
1035                                       j != NFSERR_STALESTATEID &&
1036                                       j != NFSERR_BADSTATEID &&
1037                                       j != NFSERR_BADSEQID &&
1038                                       j != NFSERR_BADXDR &&
1039                                       j != NFSERR_RESOURCE &&
1040                                       j != NFSERR_NOFILEHANDLE)))
1041                                         nd->nd_flag |= ND_INCRSEQID;
1042                         }
1043                         /*
1044                          * If this op's status is non-zero, mark
1045                          * that there is no more data to process.
1046                          * The exception is Setattr, which always has xdr
1047                          * when it has failed.
1048                          */
1049                         if (j != 0 && i != NFSV4OP_SETATTR)
1050                                 nd->nd_flag |= ND_NOMOREDATA;
1051
1052                         /*
1053                          * If R_DONTRECOVER is set, replace the stale error
1054                          * reply, so that recovery isn't initiated.
1055                          */
1056                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
1057                              nd->nd_repstat == NFSERR_BADSESSION ||
1058                              nd->nd_repstat == NFSERR_STALESTATEID) &&
1059                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
1060                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
1061                 }
1062         }
1063
1064 #ifdef KDTRACE_HOOKS
1065         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
1066                 uint32_t probe_id;
1067                 int probe_procnum;
1068
1069                 if (nd->nd_flag & ND_NFSV4) {
1070                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
1071                         probe_procnum = nd->nd_procnum;
1072                 } else if (nd->nd_flag & ND_NFSV3) {
1073                         probe_id = nfscl_nfs3_done_probes[procnum];
1074                         probe_procnum = procnum;
1075                 } else {
1076                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
1077                         probe_procnum = procnum;
1078                 }
1079                 if (probe_id != 0)
1080                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
1081                             nd->nd_mreq, cred, probe_procnum, 0);
1082         }
1083 #endif
1084
1085         m_freem(nd->nd_mreq);
1086         if (usegssname == 0)
1087                 AUTH_DESTROY(auth);
1088         if (rep != NULL)
1089                 FREE((caddr_t)rep, M_NFSDREQ);
1090         if (set_sigset)
1091                 newnfs_restore_sigmask(td, &oldset);
1092         return (0);
1093 nfsmout:
1094         mbuf_freem(nd->nd_mrep);
1095         mbuf_freem(nd->nd_mreq);
1096         if (usegssname == 0)
1097                 AUTH_DESTROY(auth);
1098         if (rep != NULL)
1099                 FREE((caddr_t)rep, M_NFSDREQ);
1100         if (set_sigset)
1101                 newnfs_restore_sigmask(td, &oldset);
1102         return (error);
1103 }
1104
1105 /*
1106  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1107  * wait for all requests to complete. This is used by forced unmounts
1108  * to terminate any outstanding RPCs.
1109  */
1110 int
1111 newnfs_nmcancelreqs(struct nfsmount *nmp)
1112 {
1113
1114         if (nmp->nm_sockreq.nr_client != NULL)
1115                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1116         return (0);
1117 }
1118
1119 /*
1120  * Any signal that can interrupt an NFS operation in an intr mount
1121  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1122  */
1123 int newnfs_sig_set[] = {
1124         SIGINT,
1125         SIGTERM,
1126         SIGHUP,
1127         SIGKILL,
1128         SIGQUIT
1129 };
1130
1131 /*
1132  * Check to see if one of the signals in our subset is pending on
1133  * the process (in an intr mount).
1134  */
1135 static int
1136 nfs_sig_pending(sigset_t set)
1137 {
1138         int i;
1139
1140         for (i = 0 ; i < nitems(newnfs_sig_set); i++)
1141                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1142                         return (1);
1143         return (0);
1144 }
1145
1146 /*
1147  * The set/restore sigmask functions are used to (temporarily) overwrite
1148  * the thread td_sigmask during an RPC call (for example). These are also
1149  * used in other places in the NFS client that might tsleep().
1150  */
1151 void
1152 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1153 {
1154         sigset_t newset;
1155         int i;
1156         struct proc *p;
1157
1158         SIGFILLSET(newset);
1159         if (td == NULL)
1160                 td = curthread; /* XXX */
1161         p = td->td_proc;
1162         /* Remove the NFS set of signals from newset */
1163         PROC_LOCK(p);
1164         mtx_lock(&p->p_sigacts->ps_mtx);
1165         for (i = 0 ; i < nitems(newnfs_sig_set); i++) {
1166                 /*
1167                  * But make sure we leave the ones already masked
1168                  * by the process, ie. remove the signal from the
1169                  * temporary signalmask only if it wasn't already
1170                  * in p_sigmask.
1171                  */
1172                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1173                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1174                         SIGDELSET(newset, newnfs_sig_set[i]);
1175         }
1176         mtx_unlock(&p->p_sigacts->ps_mtx);
1177         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1178             SIGPROCMASK_PROC_LOCKED);
1179         PROC_UNLOCK(p);
1180 }
1181
1182 void
1183 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1184 {
1185         if (td == NULL)
1186                 td = curthread; /* XXX */
1187         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1188 }
1189
1190 /*
1191  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1192  * old one after msleep() returns.
1193  */
1194 int
1195 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1196 {
1197         sigset_t oldset;
1198         int error;
1199         struct proc *p;
1200
1201         if ((priority & PCATCH) == 0)
1202                 return msleep(ident, mtx, priority, wmesg, timo);
1203         if (td == NULL)
1204                 td = curthread; /* XXX */
1205         newnfs_set_sigmask(td, &oldset);
1206         error = msleep(ident, mtx, priority, wmesg, timo);
1207         newnfs_restore_sigmask(td, &oldset);
1208         p = td->td_proc;
1209         return (error);
1210 }
1211
1212 /*
1213  * Test for a termination condition pending on the process.
1214  * This is used for NFSMNT_INT mounts.
1215  */
1216 int
1217 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1218 {
1219         struct proc *p;
1220         sigset_t tmpset;
1221
1222         /* Terminate all requests while attempting a forced unmount. */
1223         if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1224                 return (EIO);
1225         if (!(nmp->nm_flag & NFSMNT_INT))
1226                 return (0);
1227         if (td == NULL)
1228                 return (0);
1229         p = td->td_proc;
1230         PROC_LOCK(p);
1231         tmpset = p->p_siglist;
1232         SIGSETOR(tmpset, td->td_siglist);
1233         SIGSETNAND(tmpset, td->td_sigmask);
1234         mtx_lock(&p->p_sigacts->ps_mtx);
1235         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1236         mtx_unlock(&p->p_sigacts->ps_mtx);
1237         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1238             && nfs_sig_pending(tmpset)) {
1239                 PROC_UNLOCK(p);
1240                 return (EINTR);
1241         }
1242         PROC_UNLOCK(p);
1243         return (0);
1244 }
1245
1246 static int
1247 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1248 {
1249         struct proc *p;
1250
1251         p = td ? td->td_proc : NULL;
1252         if (error) {
1253                 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n",
1254                     server, msg, error);
1255         } else {
1256                 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg);
1257         }
1258         return (0);
1259 }
1260
1261 static void
1262 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1263     int error, int flags)
1264 {
1265         if (nmp == NULL)
1266                 return;
1267         mtx_lock(&nmp->nm_mtx);
1268         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1269                 nmp->nm_state |= NFSSTA_TIMEO;
1270                 mtx_unlock(&nmp->nm_mtx);
1271                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1272                     VQ_NOTRESP, 0);
1273         } else
1274                 mtx_unlock(&nmp->nm_mtx);
1275         mtx_lock(&nmp->nm_mtx);
1276         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1277                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1278                 mtx_unlock(&nmp->nm_mtx);
1279                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1280                     VQ_NOTRESPLOCK, 0);
1281         } else
1282                 mtx_unlock(&nmp->nm_mtx);
1283         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1284 }
1285
1286 static void
1287 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1288     int flags, int tprintfmsg)
1289 {
1290         if (nmp == NULL)
1291                 return;
1292         if (tprintfmsg) {
1293                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1294         }
1295
1296         mtx_lock(&nmp->nm_mtx);
1297         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1298                 nmp->nm_state &= ~NFSSTA_TIMEO;
1299                 mtx_unlock(&nmp->nm_mtx);
1300                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1301                     VQ_NOTRESP, 1);
1302         } else
1303                 mtx_unlock(&nmp->nm_mtx);
1304
1305         mtx_lock(&nmp->nm_mtx);
1306         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1307                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1308                 mtx_unlock(&nmp->nm_mtx);
1309                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1310                     VQ_NOTRESPLOCK, 1);
1311         } else
1312                 mtx_unlock(&nmp->nm_mtx);
1313 }
1314