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