sys/fs/nfs/nfs_commonkrpc.c

   1 /*-
   2  * Copyright (c) 1989, 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 /*
  38  * Socket operations for use by nfs
  39  */
  40
  41 #include "opt_kdtrace.h"
  42 #include "opt_kgssapi.h"
  43 #include "opt_nfs.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/kernel.h>
  48 #include <sys/limits.h>
  49 #include <sys/lock.h>
  50 #include <sys/malloc.h>
  51 #include <sys/mbuf.h>
  52 #include <sys/mount.h>
  53 #include <sys/mutex.h>
  54 #include <sys/proc.h>
  55 #include <sys/signalvar.h>
  56 #include <sys/syscallsubr.h>
  57 #include <sys/sysctl.h>
  58 #include <sys/syslog.h>
  59 #include <sys/vnode.h>
  60
  61 #include <rpc/rpc.h>
  62
  63 #include <kgssapi/krb5/kcrypto.h>
  64
  65 #include <fs/nfs/nfsport.h>
  66
  67 #ifdef KDTRACE_HOOKS
  68 #include <sys/dtrace_bsd.h>
  69
  70 dtrace_nfsclient_nfs23_start_probe_func_t
  71                 dtrace_nfscl_nfs234_start_probe;
  72
  73 dtrace_nfsclient_nfs23_done_probe_func_t
  74                 dtrace_nfscl_nfs234_done_probe;
  75
  76 /*
  77  * Registered probes by RPC type.
  78  */
  79 uint32_t        nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
  80 uint32_t        nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
  81
  82 uint32_t        nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
  83 uint32_t        nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
  84
  85 uint32_t        nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
  86 uint32_t        nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
  87 #endif
  88
  89 NFSSTATESPINLOCK;
  90 NFSREQSPINLOCK;
  91 NFSDLOCKMUTEX;
  92 extern struct nfsstats newnfsstats;
  93 extern struct nfsreqhead nfsd_reqq;
  94 extern int nfscl_ticks;
  95 extern void (*ncl_call_invalcaches)(struct vnode *);
  96 extern int nfs_numnfscbd;
  97 extern int nfscl_debuglevel;
  98
  99 SVCPOOL         *nfscbd_pool;
 100 static int      nfsrv_gsscallbackson = 0;
 101 static int      nfs_bufpackets = 4;
 102 static int      nfs_reconnects;
 103 static int      nfs3_jukebox_delay = 10;
 104 static int      nfs_skip_wcc_data_onerr = 1;
 105 static int      nfs_keytab_enctype = ETYPE_DES_CBC_CRC;
 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 SYSCTL_INT(_vfs_nfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0,
 118     "Encryption type for the keytab entry used by nfs");
 119
 120 static void     nfs_down(struct nfsmount *, struct thread *, const char *,
 121     int, int);
 122 static void     nfs_up(struct nfsmount *, struct thread *, const char *,
 123     int, int);
 124 static int      nfs_msg(struct thread *, const char *, const char *, int);
 125
 126 struct nfs_cached_auth {
 127         int             ca_refs; /* refcount, including 1 from the cache */
 128         uid_t           ca_uid;  /* uid that corresponds to this auth */
 129         AUTH            *ca_auth; /* RPC auth handle */
 130 };
 131
 132 static int nfsv2_procid[NFS_V3NPROCS] = {
 133         NFSV2PROC_NULL,
 134         NFSV2PROC_GETATTR,
 135         NFSV2PROC_SETATTR,
 136         NFSV2PROC_LOOKUP,
 137         NFSV2PROC_NOOP,
 138         NFSV2PROC_READLINK,
 139         NFSV2PROC_READ,
 140         NFSV2PROC_WRITE,
 141         NFSV2PROC_CREATE,
 142         NFSV2PROC_MKDIR,
 143         NFSV2PROC_SYMLINK,
 144         NFSV2PROC_CREATE,
 145         NFSV2PROC_REMOVE,
 146         NFSV2PROC_RMDIR,
 147         NFSV2PROC_RENAME,
 148         NFSV2PROC_LINK,
 149         NFSV2PROC_READDIR,
 150         NFSV2PROC_NOOP,
 151         NFSV2PROC_STATFS,
 152         NFSV2PROC_NOOP,
 153         NFSV2PROC_NOOP,
 154         NFSV2PROC_NOOP,
 155 };
 156
 157 /*
 158  * Initialize sockets and congestion for a new NFS connection.
 159  * We do not free the sockaddr if error.
 160  */
 161 int
 162 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
 163     struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
 164 {
 165         int rcvreserve, sndreserve;
 166         int pktscale;
 167         struct sockaddr *saddr;
 168         struct ucred *origcred;
 169         CLIENT *client;
 170         struct netconfig *nconf;
 171         struct socket *so;
 172         int one = 1, retries, error = 0;
 173         struct thread *td = curthread;
 174         SVCXPRT *xprt;
 175         struct timeval timo;
 176
 177         /*
 178          * We need to establish the socket using the credentials of
 179          * the mountpoint.  Some parts of this process (such as
 180          * sobind() and soconnect()) will use the curent thread's
 181          * credential instead of the socket credential.  To work
 182          * around this, temporarily change the current thread's
 183          * credential to that of the mountpoint.
 184          *
 185          * XXX: It would be better to explicitly pass the correct
 186          * credential to sobind() and soconnect().
 187          */
 188         origcred = td->td_ucred;
 189
 190         /*
 191          * Use the credential in nr_cred, if not NULL.
 192          */
 193         if (nrp->nr_cred != NULL)
 194                 td->td_ucred = nrp->nr_cred;
 195         else
 196                 td->td_ucred = cred;
 197         saddr = nrp->nr_nam;
 198
 199         if (saddr->sa_family == AF_INET)
 200                 if (nrp->nr_sotype == SOCK_DGRAM)
 201                         nconf = getnetconfigent("udp");
 202                 else
 203                         nconf = getnetconfigent("tcp");
 204         else
 205                 if (nrp->nr_sotype == SOCK_DGRAM)
 206                         nconf = getnetconfigent("udp6");
 207                 else
 208                         nconf = getnetconfigent("tcp6");
 209
 210         pktscale = nfs_bufpackets;
 211         if (pktscale < 2)
 212                 pktscale = 2;
 213         if (pktscale > 64)
 214                 pktscale = 64;
 215         /*
 216          * soreserve() can fail if sb_max is too small, so shrink pktscale
 217          * and try again if there is an error.
 218          * Print a log message suggesting increasing sb_max.
 219          * Creating a socket and doing this is necessary since, if the
 220          * reservation sizes are too large and will make soreserve() fail,
 221          * the connection will work until a large send is attempted and
 222          * then it will loop in the krpc code.
 223          */
 224         so = NULL;
 225         saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
 226         error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
 227             nrp->nr_soproto, td->td_ucred, td);
 228         if (error) {
 229                 td->td_ucred = origcred;
 230                 goto out;
 231         }
 232         do {
 233             if (error != 0 && pktscale > 2)
 234                 pktscale--;
 235             if (nrp->nr_sotype == SOCK_DGRAM) {
 236                 if (nmp != NULL) {
 237                         sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 238                             pktscale;
 239                         rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
 240                             pktscale;
 241                 } else {
 242                         sndreserve = rcvreserve = 1024 * pktscale;
 243                 }
 244             } else {
 245                 if (nrp->nr_sotype != SOCK_STREAM)
 246                         panic("nfscon sotype");
 247                 if (nmp != NULL) {
 248                         sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 249                             sizeof (u_int32_t)) * pktscale;
 250                         rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
 251                             sizeof (u_int32_t)) * pktscale;
 252                 } else {
 253                         sndreserve = rcvreserve = 1024 * pktscale;
 254                 }
 255             }
 256             error = soreserve(so, sndreserve, rcvreserve);
 257         } while (error != 0 && pktscale > 2);
 258         soclose(so);
 259         if (error) {
 260                 td->td_ucred = origcred;
 261                 goto out;
 262         }
 263
 264         client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
 265             nrp->nr_vers, sndreserve, rcvreserve);
 266         CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
 267         if (nmp != NULL) {
 268                 if ((nmp->nm_flag & NFSMNT_INT))
 269                         CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
 270                 if ((nmp->nm_flag & NFSMNT_RESVPORT))
 271                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 272                 if (NFSHASSOFT(nmp)) {
 273                         if (nmp->nm_sotype == SOCK_DGRAM)
 274                                 /*
 275                                  * For UDP, the large timeout for a reconnect
 276                                  * will be set to "nm_retry * nm_timeo / 2", so
 277                                  * we only want to do 2 reconnect timeout
 278                                  * retries.
 279                                  */
 280                                 retries = 2;
 281                         else
 282                                 retries = nmp->nm_retry;
 283                 } else
 284                         retries = INT_MAX;
 285                 if (NFSHASNFSV4N(nmp)) {
 286                         /*
 287                          * Make sure the nfscbd_pool doesn't get destroyed
 288                          * while doing this.
 289                          */
 290                         NFSD_LOCK();
 291                         if (nfs_numnfscbd > 0) {
 292                                 nfs_numnfscbd++;
 293                                 NFSD_UNLOCK();
 294                                 xprt = svc_vc_create_backchannel(nfscbd_pool);
 295                                 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
 296                                 NFSD_LOCK();
 297                                 nfs_numnfscbd--;
 298                                 if (nfs_numnfscbd == 0)
 299                                         wakeup(&nfs_numnfscbd);
 300                         }
 301                         NFSD_UNLOCK();
 302                 }
 303         } else {
 304                 /*
 305                  * Three cases:
 306                  * - Null RPC callback to client
 307                  * - Non-Null RPC callback to client, wait a little longer
 308                  * - upcalls to nfsuserd and gssd (clp == NULL)
 309                  */
 310                 if (callback_retry_mult == 0) {
 311                         retries = NFSV4_UPCALLRETRY;
 312                         CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
 313                 } else {
 314                         retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
 315                 }
 316         }
 317         CLNT_CONTROL(client, CLSET_RETRIES, &retries);
 318
 319         if (nmp != NULL) {
 320                 /*
 321                  * For UDP, there are 2 timeouts:
 322                  * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
 323                  *   that does a retransmit of an RPC request using the same
 324                  *   socket and xid. This is what you normally want to do,
 325                  *   since NFS servers depend on "same xid" for their
 326                  *   Duplicate Request Cache.
 327                  * - timeout specified in CLNT_CALL_MBUF(), which specifies when
 328                  *   retransmits on the same socket should fail and a fresh
 329                  *   socket created. Each of these timeouts counts as one
 330                  *   CLSET_RETRIES as set above.
 331                  * Set the initial retransmit timeout for UDP. This timeout
 332                  * doesn't exist for TCP and the following call just fails,
 333                  * which is ok.
 334                  */
 335                 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
 336                 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
 337                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
 338         }
 339
 340         mtx_lock(&nrp->nr_mtx);
 341         if (nrp->nr_client != NULL) {
 342                 /*
 343                  * Someone else already connected.
 344                  */
 345                 CLNT_RELEASE(client);
 346         } else {
 347                 nrp->nr_client = client;
 348         }
 349
 350         /*
 351          * Protocols that do not require connections may be optionally left
 352          * unconnected for servers that reply from a port other than NFS_PORT.
 353          */
 354         if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
 355                 mtx_unlock(&nrp->nr_mtx);
 356                 CLNT_CONTROL(client, CLSET_CONNECT, &one);
 357         } else {
 358                 mtx_unlock(&nrp->nr_mtx);
 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 #ifdef notyet
 397         rpc_gss_options_req_t req_options;
 398 #endif
 399
 400         switch (secflavour) {
 401         case RPCSEC_GSS_KRB5:
 402         case RPCSEC_GSS_KRB5I:
 403         case RPCSEC_GSS_KRB5P:
 404                 if (!mech_oid) {
 405                         if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
 406                                 return (NULL);
 407                 }
 408                 if (secflavour == RPCSEC_GSS_KRB5)
 409                         svc = rpc_gss_svc_none;
 410                 else if (secflavour == RPCSEC_GSS_KRB5I)
 411                         svc = rpc_gss_svc_integrity;
 412                 else
 413                         svc = rpc_gss_svc_privacy;
 414 #ifdef notyet
 415                 req_options.req_flags = GSS_C_MUTUAL_FLAG;
 416                 req_options.time_req = 0;
 417                 req_options.my_cred = GSS_C_NO_CREDENTIAL;
 418                 req_options.input_channel_bindings = NULL;
 419                 req_options.enc_type = nfs_keytab_enctype;
 420
 421                 auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 422                     clnt_principal, srv_principal, mech_oid, svc,
 423                     &req_options);
 424 #else
 425                 /*
 426                  * Until changes to the rpcsec_gss code are committed,
 427                  * there is no support for host based initiator
 428                  * principals. As such, that case cannot yet be handled.
 429                  */
 430                 if (clnt_principal == NULL)
 431                         auth = rpc_gss_secfind_call(nrp->nr_client, cred,
 432                             srv_principal, mech_oid, svc);
 433                 else
 434                         auth = NULL;
 435 #endif
 436                 if (auth != NULL)
 437                         return (auth);
 438                 /* fallthrough */
 439         case AUTH_SYS:
 440         default:
 441                 return (authunix_create(cred));
 442
 443         }
 444 }
 445
 446 /*
 447  * Callback from the RPC code to generate up/down notifications.
 448  */
 449
 450 struct nfs_feedback_arg {
 451         struct nfsmount *nf_mount;
 452         int             nf_lastmsg;     /* last tprintf */
 453         int             nf_tprintfmsg;
 454         struct thread   *nf_td;
 455 };
 456
 457 static void
 458 nfs_feedback(int type, int proc, void *arg)
 459 {
 460         struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
 461         struct nfsmount *nmp = nf->nf_mount;
 462         time_t now;
 463
 464         switch (type) {
 465         case FEEDBACK_REXMIT2:
 466         case FEEDBACK_RECONNECT:
 467                 now = NFSD_MONOSEC;
 468                 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
 469                         nfs_down(nmp, nf->nf_td,
 470                             "not responding", 0, NFSSTA_TIMEO);
 471                         nf->nf_tprintfmsg = TRUE;
 472                         nf->nf_lastmsg = now;
 473                 }
 474                 break;
 475
 476         case FEEDBACK_OK:
 477                 nfs_up(nf->nf_mount, nf->nf_td,
 478                     "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
 479                 break;
 480         }
 481 }
 482
 483 /*
 484  * newnfs_request - goes something like this
 485  *      - does the rpc by calling the krpc layer
 486  *      - break down rpc header and return with nfs reply
 487  * nb: always frees up nd_mreq mbuf list
 488  */
 489 int
 490 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
 491     struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
 492     struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
 493     u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
 494 {
 495         u_int32_t retseq, retval, *tl;
 496         time_t waituntil;
 497         int i = 0, j = 0, opcnt, set_sigset = 0, slot;
 498         int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
 499         int freeslot, timeo;
 500         u_int16_t procnum;
 501         u_int trylater_delay = 1;
 502         struct nfs_feedback_arg nf;
 503         struct timeval timo;
 504         AUTH *auth;
 505         struct rpc_callextra ext;
 506         enum clnt_stat stat;
 507         struct nfsreq *rep = NULL;
 508         char *srv_principal = NULL;
 509         sigset_t oldset;
 510         struct ucred *authcred;
 511
 512         if (xidp != NULL)
 513                 *xidp = 0;
 514         /* Reject requests while attempting a forced unmount. */
 515         if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
 516                 m_freem(nd->nd_mreq);
 517                 return (ESTALE);
 518         }
 519
 520         /*
 521          * Set authcred, which is used to acquire RPC credentials to
 522          * the cred argument, by default. The crhold() should not be
 523          * necessary, but will ensure that some future code change
 524          * doesn't result in the credential being free'd prematurely.
 525          */
 526         authcred = crhold(cred);
 527
 528         /* For client side interruptible mounts, mask off the signals. */
 529         if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
 530                 newnfs_set_sigmask(td, &oldset);
 531                 set_sigset = 1;
 532         }
 533
 534         /*
 535          * XXX if not already connected call nfs_connect now. Longer
 536          * term, change nfs_mount to call nfs_connect unconditionally
 537          * and let clnt_reconnect_create handle reconnects.
 538          */
 539         if (nrp->nr_client == NULL)
 540                 newnfs_connect(nmp, nrp, cred, td, 0);
 541
 542         /*
 543          * For a client side mount, nmp is != NULL and clp == NULL. For
 544          * server calls (callbacks or upcalls), nmp == NULL.
 545          */
 546         if (clp != NULL) {
 547                 NFSLOCKSTATE();
 548                 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
 549                         secflavour = RPCSEC_GSS_KRB5;
 550                         if (nd->nd_procnum != NFSPROC_NULL) {
 551                                 if (clp->lc_flags & LCL_GSSINTEGRITY)
 552                                         secflavour = RPCSEC_GSS_KRB5I;
 553                                 else if (clp->lc_flags & LCL_GSSPRIVACY)
 554                                         secflavour = RPCSEC_GSS_KRB5P;
 555                         }
 556                 }
 557                 NFSUNLOCKSTATE();
 558         } else if (nmp != NULL && NFSHASKERB(nmp) &&
 559              nd->nd_procnum != NFSPROC_NULL) {
 560                 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
 561                         nd->nd_flag |= ND_USEGSSNAME;
 562                 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
 563                         /*
 564                          * If there is a client side host based credential,
 565                          * use that, otherwise use the system uid, if set.
 566                          * The system uid is in the nmp->nm_sockreq.nr_cred
 567                          * credentials.
 568                          */
 569                         if (nmp->nm_krbnamelen > 0) {
 570                                 usegssname = 1;
 571                         } else if (nmp->nm_uid != (uid_t)-1) {
 572                                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 573                                     ("newnfs_request: NULL nr_cred"));
 574                                 crfree(authcred);
 575                                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 576                         }
 577                 } else if (nmp->nm_krbnamelen == 0 &&
 578                     nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
 579                         /*
 580                          * If there is no host based principal name and
 581                          * the system uid is set and this is root, use the
 582                          * system uid, since root won't have user
 583                          * credentials in a credentials cache file.
 584                          * The system uid is in the nmp->nm_sockreq.nr_cred
 585                          * credentials.
 586                          */
 587                         KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 588                             ("newnfs_request: NULL nr_cred"));
 589                         crfree(authcred);
 590                         authcred = crhold(nmp->nm_sockreq.nr_cred);
 591                 }
 592                 if (NFSHASINTEGRITY(nmp))
 593                         secflavour = RPCSEC_GSS_KRB5I;
 594                 else if (NFSHASPRIVACY(nmp))
 595                         secflavour = RPCSEC_GSS_KRB5P;
 596                 else
 597                         secflavour = RPCSEC_GSS_KRB5;
 598                 srv_principal = NFSMNT_SRVKRBNAME(nmp);
 599         } else if (nmp != NULL && !NFSHASKERB(nmp) &&
 600             nd->nd_procnum != NFSPROC_NULL &&
 601             (nd->nd_flag & ND_USEGSSNAME) != 0) {
 602                 /*
 603                  * Use the uid that did the mount when the RPC is doing
 604                  * NFSv4 system operations, as indicated by the
 605                  * ND_USEGSSNAME flag, for the AUTH_SYS case.
 606                  * The credentials in nm_sockreq.nr_cred were used for the
 607                  * mount.
 608                  */
 609                 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
 610                     ("newnfs_request: NULL nr_cred"));
 611                 crfree(authcred);
 612                 authcred = crhold(nmp->nm_sockreq.nr_cred);
 613         }
 614
 615         if (nmp != NULL) {
 616                 bzero(&nf, sizeof(struct nfs_feedback_arg));
 617                 nf.nf_mount = nmp;
 618                 nf.nf_td = td;
 619                 nf.nf_lastmsg = NFSD_MONOSEC -
 620                     ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
 621         }
 622
 623         if (nd->nd_procnum == NFSPROC_NULL)
 624                 auth = authnone_create();
 625         else if (usegssname)
 626                 auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname,
 627                     srv_principal, NULL, authcred);
 628         else
 629                 auth = nfs_getauth(nrp, secflavour, NULL,
 630                     srv_principal, NULL, authcred);
 631         crfree(authcred);
 632         if (auth == NULL) {
 633                 m_freem(nd->nd_mreq);
 634                 if (set_sigset)
 635                         newnfs_restore_sigmask(td, &oldset);
 636                 return (EACCES);
 637         }
 638         bzero(&ext, sizeof(ext));
 639         ext.rc_auth = auth;
 640         if (nmp != NULL) {
 641                 ext.rc_feedback = nfs_feedback;
 642                 ext.rc_feedback_arg = &nf;
 643         }
 644
 645         procnum = nd->nd_procnum;
 646         if ((nd->nd_flag & ND_NFSV4) &&
 647             nd->nd_procnum != NFSPROC_NULL &&
 648             nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
 649                 procnum = NFSV4PROC_COMPOUND;
 650
 651         if (nmp != NULL) {
 652                 NFSINCRGLOBAL(newnfsstats.rpcrequests);
 653
 654                 /* Map the procnum to the old NFSv2 one, as required. */
 655                 if ((nd->nd_flag & ND_NFSV2) != 0) {
 656                         if (nd->nd_procnum < NFS_V3NPROCS)
 657                                 procnum = nfsv2_procid[nd->nd_procnum];
 658                         else
 659                                 procnum = NFSV2PROC_NOOP;
 660                 }
 661
 662                 /*
 663                  * Now only used for the R_DONTRECOVER case, but until that is
 664                  * supported within the krpc code, I need to keep a queue of
 665                  * outstanding RPCs for nfsv4 client requests.
 666                  */
 667                 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
 668                         MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
 669                             M_NFSDREQ, M_WAITOK);
 670 #ifdef KDTRACE_HOOKS
 671                 if (dtrace_nfscl_nfs234_start_probe != NULL) {
 672                         uint32_t probe_id;
 673                         int probe_procnum;
 674
 675                         if (nd->nd_flag & ND_NFSV4) {
 676                                 probe_id =
 677                                     nfscl_nfs4_start_probes[nd->nd_procnum];
 678                                 probe_procnum = nd->nd_procnum;
 679                         } else if (nd->nd_flag & ND_NFSV3) {
 680                                 probe_id = nfscl_nfs3_start_probes[procnum];
 681                                 probe_procnum = procnum;
 682                         } else {
 683                                 probe_id =
 684                                     nfscl_nfs2_start_probes[nd->nd_procnum];
 685                                 probe_procnum = procnum;
 686                         }
 687                         if (probe_id != 0)
 688                                 (dtrace_nfscl_nfs234_start_probe)
 689                                     (probe_id, vp, nd->nd_mreq, cred,
 690                                      probe_procnum);
 691                 }
 692 #endif
 693         }
 694         trycnt = 0;
 695         freeslot = -1;          /* Set to slot that needs to be free'd */
 696 tryagain:
 697         slot = -1;              /* Slot that needs a sequence# increment. */
 698         /*
 699          * This timeout specifies when a new socket should be created,
 700          * along with new xid values. For UDP, this should be done
 701          * infrequently, since retransmits of RPC requests should normally
 702          * use the same xid.
 703          */
 704         if (nmp == NULL) {
 705                 timo.tv_usec = 0;
 706                 if (clp == NULL)
 707                         timo.tv_sec = NFSV4_UPCALLTIMEO;
 708                 else
 709                         timo.tv_sec = NFSV4_CALLBACKTIMEO;
 710         } else {
 711                 if (nrp->nr_sotype != SOCK_DGRAM) {
 712                         timo.tv_usec = 0;
 713                         if ((nmp->nm_flag & NFSMNT_NFSV4))
 714                                 timo.tv_sec = INT_MAX;
 715                         else
 716                                 timo.tv_sec = NFS_TCPTIMEO;
 717                 } else {
 718                         if (NFSHASSOFT(nmp)) {
 719                                 /*
 720                                  * CLSET_RETRIES is set to 2, so this should be
 721                                  * half of the total timeout required.
 722                                  */
 723                                 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
 724                                 if (timeo < 1)
 725                                         timeo = 1;
 726                                 timo.tv_sec = timeo / NFS_HZ;
 727                                 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
 728                                     NFS_HZ;
 729                         } else {
 730                                 /* For UDP hard mounts, use a large value. */
 731                                 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
 732                                 timo.tv_usec = 0;
 733                         }
 734                 }
 735
 736                 if (rep != NULL) {
 737                         rep->r_flags = 0;
 738                         rep->r_nmp = nmp;
 739                         /*
 740                          * Chain request into list of outstanding requests.
 741                          */
 742                         NFSLOCKREQ();
 743                         TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
 744                         NFSUNLOCKREQ();
 745                 }
 746         }
 747
 748         nd->nd_mrep = NULL;
 749         stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq,
 750             &nd->nd_mrep, timo);
 751
 752         if (rep != NULL) {
 753                 /*
 754                  * RPC done, unlink the request.
 755                  */
 756                 NFSLOCKREQ();
 757                 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
 758                 NFSUNLOCKREQ();
 759         }
 760
 761         /*
 762          * If there was a successful reply and a tprintf msg.
 763          * tprintf a response.
 764          */
 765         if (stat == RPC_SUCCESS) {
 766                 error = 0;
 767         } else if (stat == RPC_TIMEDOUT) {
 768                 NFSINCRGLOBAL(newnfsstats.rpctimeouts);
 769                 error = ETIMEDOUT;
 770         } else if (stat == RPC_VERSMISMATCH) {
 771                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 772                 error = EOPNOTSUPP;
 773         } else if (stat == RPC_PROGVERSMISMATCH) {
 774                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 775                 error = EPROTONOSUPPORT;
 776         } else if (stat == RPC_INTR) {
 777                 error = EINTR;
 778         } else {
 779                 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
 780                 error = EACCES;
 781         }
 782         if (error) {
 783                 m_freem(nd->nd_mreq);
 784                 AUTH_DESTROY(auth);
 785                 if (rep != NULL)
 786                         FREE((caddr_t)rep, M_NFSDREQ);
 787                 if (set_sigset)
 788                         newnfs_restore_sigmask(td, &oldset);
 789                 return (error);
 790         }
 791
 792         KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
 793
 794         /*
 795          * Search for any mbufs that are not a multiple of 4 bytes long
 796          * or with m_data not longword aligned.
 797          * These could cause pointer alignment problems, so copy them to
 798          * well aligned mbufs.
 799          */
 800         newnfs_realign(&nd->nd_mrep);
 801         nd->nd_md = nd->nd_mrep;
 802         nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
 803         nd->nd_repstat = 0;
 804         if (nd->nd_procnum != NFSPROC_NULL) {
 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                                 NFSCL_DEBUG(1, "failed seq=%d\n", j);
 838                         if (nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) {
 839                                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
 840                                     5 * NFSX_UNSIGNED);
 841                                 mtx_lock(&sep->nfsess_mtx);
 842                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 843                                 retseq = fxdr_unsigned(uint32_t, *tl++);
 844                                 slot = fxdr_unsigned(int, *tl++);
 845                                 freeslot = slot;
 846                                 if (retseq != sep->nfsess_slotseq[slot])
 847                                         printf("retseq diff 0x%x\n", retseq);
 848                                 retval = fxdr_unsigned(uint32_t, *++tl);
 849                                 if ((retval + 1) < sep->nfsess_foreslots)
 850                                         sep->nfsess_foreslots = (retval + 1);
 851                                 else if ((retval + 1) > sep->nfsess_foreslots)
 852                                         sep->nfsess_foreslots = (retval < 64) ?
 853                                             (retval + 1) : 64;
 854                                 mtx_unlock(&sep->nfsess_mtx);
 855
 856                                 /* Grab the op and status for the next one. */
 857                                 if (opcnt > 1) {
 858                                         NFSM_DISSECT(tl, uint32_t *,
 859                                             2 * NFSX_UNSIGNED);
 860                                         i = fxdr_unsigned(int, *tl++);
 861                                         j = fxdr_unsigned(int, *tl);
 862                                 }
 863                         }
 864                 }
 865                 if (nd->nd_repstat != 0) {
 866                         if (((nd->nd_repstat == NFSERR_DELAY ||
 867                               nd->nd_repstat == NFSERR_GRACE) &&
 868                              (nd->nd_flag & ND_NFSV4) &&
 869                              nd->nd_procnum != NFSPROC_DELEGRETURN &&
 870                              nd->nd_procnum != NFSPROC_SETATTR &&
 871                              nd->nd_procnum != NFSPROC_READ &&
 872                              nd->nd_procnum != NFSPROC_READDS &&
 873                              nd->nd_procnum != NFSPROC_WRITE &&
 874                              nd->nd_procnum != NFSPROC_WRITEDS &&
 875                              nd->nd_procnum != NFSPROC_OPEN &&
 876                              nd->nd_procnum != NFSPROC_CREATE &&
 877                              nd->nd_procnum != NFSPROC_OPENCONFIRM &&
 878                              nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
 879                              nd->nd_procnum != NFSPROC_CLOSE &&
 880                              nd->nd_procnum != NFSPROC_LOCK &&
 881                              nd->nd_procnum != NFSPROC_LOCKU) ||
 882                             (nd->nd_repstat == NFSERR_DELAY &&
 883                              (nd->nd_flag & ND_NFSV4) == 0) ||
 884                             nd->nd_repstat == NFSERR_RESOURCE) {
 885                                 if (trylater_delay > NFS_TRYLATERDEL)
 886                                         trylater_delay = NFS_TRYLATERDEL;
 887                                 waituntil = NFSD_MONOSEC + trylater_delay;
 888                                 while (NFSD_MONOSEC < waituntil)
 889                                         (void) nfs_catnap(PZERO, 0, "nfstry");
 890                                 trylater_delay *= 2;
 891                                 if (slot != -1) {
 892                                         mtx_lock(&sep->nfsess_mtx);
 893                                         sep->nfsess_slotseq[slot]++;
 894                                         *nd->nd_slotseq = txdr_unsigned(
 895                                             sep->nfsess_slotseq[slot]);
 896                                         mtx_unlock(&sep->nfsess_mtx);
 897                                 }
 898                                 m_freem(nd->nd_mrep);
 899                                 nd->nd_mrep = NULL;
 900                                 goto tryagain;
 901                         }
 902
 903                         /*
 904                          * If the File Handle was stale, invalidate the
 905                          * lookup cache, just in case.
 906                          * (vp != NULL implies a client side call)
 907                          */
 908                         if (nd->nd_repstat == ESTALE && vp != NULL) {
 909                                 cache_purge(vp);
 910                                 if (ncl_call_invalcaches != NULL)
 911                                         (*ncl_call_invalcaches)(vp);
 912                         }
 913                 }
 914                 if ((nd->nd_flag & ND_NFSV4) != 0) {
 915                         /* Free the slot, as required. */
 916                         if (freeslot != -1)
 917                                 nfsv4_freeslot(sep, freeslot);
 918                         /*
 919                          * If this op is Putfh, throw its results away.
 920                          */
 921                         if (j >= 10000)
 922                                 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
 923                         if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
 924                                 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
 925                                 i = fxdr_unsigned(int, *tl++);
 926                                 j = fxdr_unsigned(int, *tl);
 927                                 if (j >= 10000)
 928                                         NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
 929                                             j);
 930                                 /*
 931                                  * All Compounds that do an Op that must
 932                                  * be in sequence consist of NFSV4OP_PUTFH
 933                                  * followed by one of these. As such, we
 934                                  * can determine if the seqid# should be
 935                                  * incremented, here.
 936                                  */
 937                                 if ((i == NFSV4OP_OPEN ||
 938                                      i == NFSV4OP_OPENCONFIRM ||
 939                                      i == NFSV4OP_OPENDOWNGRADE ||
 940                                      i == NFSV4OP_CLOSE ||
 941                                      i == NFSV4OP_LOCK ||
 942                                      i == NFSV4OP_LOCKU) &&
 943                                     (j == 0 ||
 944                                      (j != NFSERR_STALECLIENTID &&
 945                                       j != NFSERR_STALESTATEID &&
 946                                       j != NFSERR_BADSTATEID &&
 947                                       j != NFSERR_BADSEQID &&
 948                                       j != NFSERR_BADXDR &&
 949                                       j != NFSERR_RESOURCE &&
 950                                       j != NFSERR_NOFILEHANDLE)))
 951                                         nd->nd_flag |= ND_INCRSEQID;
 952                         }
 953                         /*
 954                          * If this op's status is non-zero, mark
 955                          * that there is no more data to process.
 956                          */
 957                         if (j)
 958                                 nd->nd_flag |= ND_NOMOREDATA;
 959
 960                         /*
 961                          * If R_DONTRECOVER is set, replace the stale error
 962                          * reply, so that recovery isn't initiated.
 963                          */
 964                         if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
 965                              nd->nd_repstat == NFSERR_BADSESSION ||
 966                              nd->nd_repstat == NFSERR_STALESTATEID) &&
 967                             rep != NULL && (rep->r_flags & R_DONTRECOVER))
 968                                 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
 969                 }
 970         }
 971
 972 #ifdef KDTRACE_HOOKS
 973         if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
 974                 uint32_t probe_id;
 975                 int probe_procnum;
 976
 977                 if (nd->nd_flag & ND_NFSV4) {
 978                         probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
 979                         probe_procnum = nd->nd_procnum;
 980                 } else if (nd->nd_flag & ND_NFSV3) {
 981                         probe_id = nfscl_nfs3_done_probes[procnum];
 982                         probe_procnum = procnum;
 983                 } else {
 984                         probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
 985                         probe_procnum = procnum;
 986                 }
 987                 if (probe_id != 0)
 988                         (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
 989                             nd->nd_mreq, cred, probe_procnum, 0);
 990         }
 991 #endif
 992
 993         m_freem(nd->nd_mreq);
 994         AUTH_DESTROY(auth);
 995         if (rep != NULL)
 996                 FREE((caddr_t)rep, M_NFSDREQ);
 997         if (set_sigset)
 998                 newnfs_restore_sigmask(td, &oldset);
 999         return (0);
1000 nfsmout:
1001         mbuf_freem(nd->nd_mrep);
1002         mbuf_freem(nd->nd_mreq);
1003         AUTH_DESTROY(auth);
1004         if (rep != NULL)
1005                 FREE((caddr_t)rep, M_NFSDREQ);
1006         if (set_sigset)
1007                 newnfs_restore_sigmask(td, &oldset);
1008         return (error);
1009 }
1010
1011 /*
1012  * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1013  * wait for all requests to complete. This is used by forced unmounts
1014  * to terminate any outstanding RPCs.
1015  */
1016 int
1017 newnfs_nmcancelreqs(struct nfsmount *nmp)
1018 {
1019
1020         if (nmp->nm_sockreq.nr_client != NULL)
1021                 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1022         return (0);
1023 }
1024
1025 /*
1026  * Any signal that can interrupt an NFS operation in an intr mount
1027  * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1028  */
1029 int newnfs_sig_set[] = {
1030         SIGINT,
1031         SIGTERM,
1032         SIGHUP,
1033         SIGKILL,
1034         SIGSTOP,
1035         SIGQUIT
1036 };
1037
1038 /*
1039  * Check to see if one of the signals in our subset is pending on
1040  * the process (in an intr mount).
1041  */
1042 static int
1043 nfs_sig_pending(sigset_t set)
1044 {
1045         int i;
1046
1047         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
1048                 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1049                         return (1);
1050         return (0);
1051 }
1052
1053 /*
1054  * The set/restore sigmask functions are used to (temporarily) overwrite
1055  * the process p_sigmask during an RPC call (for example). These are also
1056  * used in other places in the NFS client that might tsleep().
1057  */
1058 void
1059 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1060 {
1061         sigset_t newset;
1062         int i;
1063         struct proc *p;
1064
1065         SIGFILLSET(newset);
1066         if (td == NULL)
1067                 td = curthread; /* XXX */
1068         p = td->td_proc;
1069         /* Remove the NFS set of signals from newset */
1070         PROC_LOCK(p);
1071         mtx_lock(&p->p_sigacts->ps_mtx);
1072         for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
1073                 /*
1074                  * But make sure we leave the ones already masked
1075                  * by the process, ie. remove the signal from the
1076                  * temporary signalmask only if it wasn't already
1077                  * in p_sigmask.
1078                  */
1079                 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1080                     !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1081                         SIGDELSET(newset, newnfs_sig_set[i]);
1082         }
1083         mtx_unlock(&p->p_sigacts->ps_mtx);
1084         PROC_UNLOCK(p);
1085         kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0);
1086 }
1087
1088 void
1089 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1090 {
1091         if (td == NULL)
1092                 td = curthread; /* XXX */
1093         kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1094 }
1095
1096 /*
1097  * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1098  * old one after msleep() returns.
1099  */
1100 int
1101 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1102 {
1103         sigset_t oldset;
1104         int error;
1105         struct proc *p;
1106
1107         if ((priority & PCATCH) == 0)
1108                 return msleep(ident, mtx, priority, wmesg, timo);
1109         if (td == NULL)
1110                 td = curthread; /* XXX */
1111         newnfs_set_sigmask(td, &oldset);
1112         error = msleep(ident, mtx, priority, wmesg, timo);
1113         newnfs_restore_sigmask(td, &oldset);
1114         p = td->td_proc;
1115         return (error);
1116 }
1117
1118 /*
1119  * Test for a termination condition pending on the process.
1120  * This is used for NFSMNT_INT mounts.
1121  */
1122 int
1123 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1124 {
1125         struct proc *p;
1126         sigset_t tmpset;
1127
1128         /* Terminate all requests while attempting a forced unmount. */
1129         if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1130                 return (EIO);
1131         if (!(nmp->nm_flag & NFSMNT_INT))
1132                 return (0);
1133         if (td == NULL)
1134                 return (0);
1135         p = td->td_proc;
1136         PROC_LOCK(p);
1137         tmpset = p->p_siglist;
1138         SIGSETOR(tmpset, td->td_siglist);
1139         SIGSETNAND(tmpset, td->td_sigmask);
1140         mtx_lock(&p->p_sigacts->ps_mtx);
1141         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1142         mtx_unlock(&p->p_sigacts->ps_mtx);
1143         if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1144             && nfs_sig_pending(tmpset)) {
1145                 PROC_UNLOCK(p);
1146                 return (EINTR);
1147         }
1148         PROC_UNLOCK(p);
1149         return (0);
1150 }
1151
1152 static int
1153 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1154 {
1155         struct proc *p;
1156
1157         p = td ? td->td_proc : NULL;
1158         if (error) {
1159                 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
1160                     server, msg, error);
1161         } else {
1162                 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
1163         }
1164         return (0);
1165 }
1166
1167 static void
1168 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1169     int error, int flags)
1170 {
1171         if (nmp == NULL)
1172                 return;
1173         mtx_lock(&nmp->nm_mtx);
1174         if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1175                 nmp->nm_state |= NFSSTA_TIMEO;
1176                 mtx_unlock(&nmp->nm_mtx);
1177                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1178                     VQ_NOTRESP, 0);
1179         } else
1180                 mtx_unlock(&nmp->nm_mtx);
1181         mtx_lock(&nmp->nm_mtx);
1182         if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1183                 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1184                 mtx_unlock(&nmp->nm_mtx);
1185                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1186                     VQ_NOTRESPLOCK, 0);
1187         } else
1188                 mtx_unlock(&nmp->nm_mtx);
1189         nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1190 }
1191
1192 static void
1193 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1194     int flags, int tprintfmsg)
1195 {
1196         if (nmp == NULL)
1197                 return;
1198         if (tprintfmsg) {
1199                 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1200         }
1201
1202         mtx_lock(&nmp->nm_mtx);
1203         if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1204                 nmp->nm_state &= ~NFSSTA_TIMEO;
1205                 mtx_unlock(&nmp->nm_mtx);
1206                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1207                     VQ_NOTRESP, 1);
1208         } else
1209                 mtx_unlock(&nmp->nm_mtx);
1210
1211         mtx_lock(&nmp->nm_mtx);
1212         if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1213                 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1214                 mtx_unlock(&nmp->nm_mtx);
1215                 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1216                     VQ_NOTRESPLOCK, 1);
1217         } else
1218                 mtx_unlock(&nmp->nm_mtx);
1219 }
1220