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 1315