Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/nfs/nfs_commonkrpc.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1991, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * Socket operations for use by nfs 41 */ 42 43 #include "opt_kgssapi.h" 44 #include "opt_nfs.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/limits.h> 50 #include <sys/lock.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/mount.h> 54 #include <sys/mutex.h> 55 #include <sys/proc.h> 56 #include <sys/signalvar.h> 57 #include <sys/syscallsubr.h> 58 #include <sys/sysctl.h> 59 #include <sys/syslog.h> 60 #include <sys/vnode.h> 61 62 #include <rpc/rpc.h> 63 #include <rpc/krpc.h> 64 65 #include <kgssapi/krb5/kcrypto.h> 66 67 #include <fs/nfs/nfsport.h> 68 69 #ifdef KDTRACE_HOOKS 70 #include <sys/dtrace_bsd.h> 71 72 dtrace_nfsclient_nfs23_start_probe_func_t 73 dtrace_nfscl_nfs234_start_probe; 74 75 dtrace_nfsclient_nfs23_done_probe_func_t 76 dtrace_nfscl_nfs234_done_probe; 77 78 /* 79 * Registered probes by RPC type. 80 */ 81 uint32_t nfscl_nfs2_start_probes[NFSV41_NPROCS + 1]; 82 uint32_t nfscl_nfs2_done_probes[NFSV41_NPROCS + 1]; 83 84 uint32_t nfscl_nfs3_start_probes[NFSV41_NPROCS + 1]; 85 uint32_t nfscl_nfs3_done_probes[NFSV41_NPROCS + 1]; 86 87 uint32_t nfscl_nfs4_start_probes[NFSV41_NPROCS + 1]; 88 uint32_t nfscl_nfs4_done_probes[NFSV41_NPROCS + 1]; 89 #endif 90 91 NFSSTATESPINLOCK; 92 NFSREQSPINLOCK; 93 NFSDLOCKMUTEX; 94 NFSCLSTATEMUTEX; 95 extern struct nfsstatsv1 nfsstatsv1; 96 extern struct nfsreqhead nfsd_reqq; 97 extern int nfscl_ticks; 98 extern void (*ncl_call_invalcaches)(struct vnode *); 99 extern int nfs_numnfscbd; 100 extern int nfscl_debuglevel; 101 extern int nfsrv_lease; 102 103 SVCPOOL *nfscbd_pool; 104 static int nfsrv_gsscallbackson = 0; 105 static int nfs_bufpackets = 4; 106 static int nfs_reconnects; 107 static int nfs3_jukebox_delay = 10; 108 static int nfs_skip_wcc_data_onerr = 1; 109 static int nfs_dsretries = 2; 110 static struct timespec nfs_trylater_max = { 111 .tv_sec = NFS_TRYLATERDEL, 112 .tv_nsec = 0, 113 }; 114 115 SYSCTL_DECL(_vfs_nfs); 116 117 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, 118 "Buffer reservation size 2 < x < 64"); 119 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, 120 "Number of times the nfs client has had to reconnect"); 121 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0, 122 "Number of seconds to delay a retry after receiving EJUKEBOX"); 123 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0, 124 "Disable weak cache consistency checking when server returns an error"); 125 SYSCTL_INT(_vfs_nfs, OID_AUTO, dsretries, CTLFLAG_RW, &nfs_dsretries, 0, 126 "Number of retries for a DS RPC before failure"); 127 128 static void nfs_down(struct nfsmount *, struct thread *, const char *, 129 int, int); 130 static void nfs_up(struct nfsmount *, struct thread *, const char *, 131 int, int); 132 static int nfs_msg(struct thread *, const char *, const char *, int); 133 134 struct nfs_cached_auth { 135 int ca_refs; /* refcount, including 1 from the cache */ 136 uid_t ca_uid; /* uid that corresponds to this auth */ 137 AUTH *ca_auth; /* RPC auth handle */ 138 }; 139 140 static int nfsv2_procid[NFS_V3NPROCS] = { 141 NFSV2PROC_NULL, 142 NFSV2PROC_GETATTR, 143 NFSV2PROC_SETATTR, 144 NFSV2PROC_LOOKUP, 145 NFSV2PROC_NOOP, 146 NFSV2PROC_READLINK, 147 NFSV2PROC_READ, 148 NFSV2PROC_WRITE, 149 NFSV2PROC_CREATE, 150 NFSV2PROC_MKDIR, 151 NFSV2PROC_SYMLINK, 152 NFSV2PROC_CREATE, 153 NFSV2PROC_REMOVE, 154 NFSV2PROC_RMDIR, 155 NFSV2PROC_RENAME, 156 NFSV2PROC_LINK, 157 NFSV2PROC_READDIR, 158 NFSV2PROC_NOOP, 159 NFSV2PROC_STATFS, 160 NFSV2PROC_NOOP, 161 NFSV2PROC_NOOP, 162 NFSV2PROC_NOOP, 163 }; 164 165 /* 166 * Initialize sockets and congestion for a new NFS connection. 167 * We do not free the sockaddr if error. 168 * Which arguments are set to NULL indicate what kind of call it is. 169 * cred == NULL --> a call to connect to a pNFS DS 170 * nmp == NULL --> indicates an upcall to userland or a NFSv4.0 callback 171 */ 172 int 173 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp, 174 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult) 175 { 176 int rcvreserve, sndreserve; 177 int pktscale, pktscalesav; 178 struct sockaddr *saddr; 179 struct ucred *origcred; 180 CLIENT *client; 181 struct netconfig *nconf; 182 struct socket *so; 183 int one = 1, retries, error = 0; 184 struct thread *td = curthread; 185 SVCXPRT *xprt; 186 struct timeval timo; 187 188 /* 189 * We need to establish the socket using the credentials of 190 * the mountpoint. Some parts of this process (such as 191 * sobind() and soconnect()) will use the curent thread's 192 * credential instead of the socket credential. To work 193 * around this, temporarily change the current thread's 194 * credential to that of the mountpoint. 195 * 196 * XXX: It would be better to explicitly pass the correct 197 * credential to sobind() and soconnect(). 198 */ 199 origcred = td->td_ucred; 200 201 /* 202 * Use the credential in nr_cred, if not NULL. 203 */ 204 if (nrp->nr_cred != NULL) 205 td->td_ucred = nrp->nr_cred; 206 else 207 td->td_ucred = cred; 208 saddr = nrp->nr_nam; 209 210 if (saddr->sa_family == AF_INET) 211 if (nrp->nr_sotype == SOCK_DGRAM) 212 nconf = getnetconfigent("udp"); 213 else 214 nconf = getnetconfigent("tcp"); 215 else if (saddr->sa_family == AF_LOCAL) 216 nconf = getnetconfigent("local"); 217 else 218 if (nrp->nr_sotype == SOCK_DGRAM) 219 nconf = getnetconfigent("udp6"); 220 else 221 nconf = getnetconfigent("tcp6"); 222 223 pktscale = nfs_bufpackets; 224 if (pktscale < 2) 225 pktscale = 2; 226 if (pktscale > 64) 227 pktscale = 64; 228 pktscalesav = pktscale; 229 /* 230 * soreserve() can fail if sb_max is too small, so shrink pktscale 231 * and try again if there is an error. 232 * Print a log message suggesting increasing sb_max. 233 * Creating a socket and doing this is necessary since, if the 234 * reservation sizes are too large and will make soreserve() fail, 235 * the connection will work until a large send is attempted and 236 * then it will loop in the krpc code. 237 */ 238 so = NULL; 239 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *); 240 error = socreate(saddr->sa_family, &so, nrp->nr_sotype, 241 nrp->nr_soproto, td->td_ucred, td); 242 if (error != 0) 243 goto out; 244 do { 245 if (error != 0 && pktscale > 2) { 246 if (nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 247 pktscale == pktscalesav) 248 printf("Consider increasing kern.ipc.maxsockbuf\n"); 249 pktscale--; 250 } 251 if (nrp->nr_sotype == SOCK_DGRAM) { 252 if (nmp != NULL) { 253 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 254 pktscale; 255 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 256 pktscale; 257 } else { 258 sndreserve = rcvreserve = 1024 * pktscale; 259 } 260 } else { 261 if (nrp->nr_sotype != SOCK_STREAM) 262 panic("nfscon sotype"); 263 if (nmp != NULL) { 264 sndreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 265 sizeof (u_int32_t)) * pktscale; 266 rcvreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 267 sizeof (u_int32_t)) * pktscale; 268 } else { 269 sndreserve = rcvreserve = 1024 * pktscale; 270 } 271 } 272 error = soreserve(so, sndreserve, rcvreserve); 273 if (error != 0 && nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 274 pktscale <= 2) 275 printf("Must increase kern.ipc.maxsockbuf or reduce" 276 " rsize, wsize\n"); 277 } while (error != 0 && pktscale > 2); 278 soclose(so); 279 if (error != 0) 280 goto out; 281 282 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 283 nrp->nr_vers, sndreserve, rcvreserve); 284 CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq"); 285 if (nmp != NULL) { 286 if ((nmp->nm_flag & NFSMNT_INT)) 287 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 288 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 289 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 290 if (NFSHASSOFT(nmp)) { 291 if (nmp->nm_sotype == SOCK_DGRAM) 292 /* 293 * For UDP, the large timeout for a reconnect 294 * will be set to "nm_retry * nm_timeo / 2", so 295 * we only want to do 2 reconnect timeout 296 * retries. 297 */ 298 retries = 2; 299 else 300 retries = nmp->nm_retry; 301 } else 302 retries = INT_MAX; 303 if (NFSHASNFSV4N(nmp)) { 304 if (cred != NULL) { 305 if (NFSHASSOFT(nmp)) { 306 /* 307 * This should be a DS mount. 308 * Use CLSET_TIMEOUT to set the timeout 309 * for connections to DSs instead of 310 * specifying a timeout on each RPC. 311 * This is done so that SO_SNDTIMEO 312 * is set on the TCP socket as well 313 * as specifying a time limit when 314 * waiting for an RPC reply. Useful 315 * if the send queue for the TCP 316 * connection has become constipated, 317 * due to a failed DS. 318 * The choice of lease_duration / 4 is 319 * fairly arbitrary, but seems to work 320 * ok, with a lower bound of 10sec. 321 */ 322 timo.tv_sec = nfsrv_lease / 4; 323 if (timo.tv_sec < 10) 324 timo.tv_sec = 10; 325 timo.tv_usec = 0; 326 CLNT_CONTROL(client, CLSET_TIMEOUT, 327 &timo); 328 } 329 /* 330 * Make sure the nfscbd_pool doesn't get 331 * destroyed while doing this. 332 */ 333 NFSD_LOCK(); 334 if (nfs_numnfscbd > 0) { 335 nfs_numnfscbd++; 336 NFSD_UNLOCK(); 337 xprt = svc_vc_create_backchannel( 338 nfscbd_pool); 339 CLNT_CONTROL(client, CLSET_BACKCHANNEL, 340 xprt); 341 NFSD_LOCK(); 342 nfs_numnfscbd--; 343 if (nfs_numnfscbd == 0) 344 wakeup(&nfs_numnfscbd); 345 } 346 NFSD_UNLOCK(); 347 } else { 348 /* 349 * cred == NULL for a DS connect. 350 * For connects to a DS, set a retry limit 351 * so that failed DSs will be detected. 352 * This is ok for NFSv4.1, since a DS does 353 * not maintain open/lock state and is the 354 * only case where using a "soft" mount is 355 * recommended for NFSv4. 356 * For mounts from the MDS to DS, this is done 357 * via mount options, but that is not the case 358 * here. The retry limit here can be adjusted 359 * via the sysctl vfs.nfs.dsretries. 360 * See the comment above w.r.t. timeout. 361 */ 362 timo.tv_sec = nfsrv_lease / 4; 363 if (timo.tv_sec < 10) 364 timo.tv_sec = 10; 365 timo.tv_usec = 0; 366 CLNT_CONTROL(client, CLSET_TIMEOUT, &timo); 367 retries = nfs_dsretries; 368 } 369 } 370 } else { 371 /* 372 * Three cases: 373 * - Null RPC callback to client 374 * - Non-Null RPC callback to client, wait a little longer 375 * - upcalls to nfsuserd and gssd (clp == NULL) 376 */ 377 if (callback_retry_mult == 0) { 378 retries = NFSV4_UPCALLRETRY; 379 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 380 } else { 381 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 382 } 383 } 384 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 385 386 if (nmp != NULL) { 387 /* 388 * For UDP, there are 2 timeouts: 389 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer 390 * that does a retransmit of an RPC request using the same 391 * socket and xid. This is what you normally want to do, 392 * since NFS servers depend on "same xid" for their 393 * Duplicate Request Cache. 394 * - timeout specified in CLNT_CALL_MBUF(), which specifies when 395 * retransmits on the same socket should fail and a fresh 396 * socket created. Each of these timeouts counts as one 397 * CLSET_RETRIES as set above. 398 * Set the initial retransmit timeout for UDP. This timeout 399 * doesn't exist for TCP and the following call just fails, 400 * which is ok. 401 */ 402 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 403 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ; 404 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo); 405 } 406 407 mtx_lock(&nrp->nr_mtx); 408 if (nrp->nr_client != NULL) { 409 mtx_unlock(&nrp->nr_mtx); 410 /* 411 * Someone else already connected. 412 */ 413 CLNT_RELEASE(client); 414 } else { 415 nrp->nr_client = client; 416 /* 417 * Protocols that do not require connections may be optionally 418 * left unconnected for servers that reply from a port other 419 * than NFS_PORT. 420 */ 421 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 422 mtx_unlock(&nrp->nr_mtx); 423 CLNT_CONTROL(client, CLSET_CONNECT, &one); 424 } else 425 mtx_unlock(&nrp->nr_mtx); 426 } 427 428 out: 429 /* Restore current thread's credentials. */ 430 td->td_ucred = origcred; 431 432 NFSEXITCODE(error); 433 return (error); 434 } 435 436 /* 437 * NFS disconnect. Clean up and unlink. 438 */ 439 void 440 newnfs_disconnect(struct nfssockreq *nrp) 441 { 442 CLIENT *client; 443 444 mtx_lock(&nrp->nr_mtx); 445 if (nrp->nr_client != NULL) { 446 client = nrp->nr_client; 447 nrp->nr_client = NULL; 448 mtx_unlock(&nrp->nr_mtx); 449 rpc_gss_secpurge_call(client); 450 CLNT_CLOSE(client); 451 CLNT_RELEASE(client); 452 } else { 453 mtx_unlock(&nrp->nr_mtx); 454 } 455 } 456 457 static AUTH * 458 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 459 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 460 { 461 rpc_gss_service_t svc; 462 AUTH *auth; 463 464 switch (secflavour) { 465 case RPCSEC_GSS_KRB5: 466 case RPCSEC_GSS_KRB5I: 467 case RPCSEC_GSS_KRB5P: 468 if (!mech_oid) { 469 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 470 return (NULL); 471 } 472 if (secflavour == RPCSEC_GSS_KRB5) 473 svc = rpc_gss_svc_none; 474 else if (secflavour == RPCSEC_GSS_KRB5I) 475 svc = rpc_gss_svc_integrity; 476 else 477 svc = rpc_gss_svc_privacy; 478 479 if (clnt_principal == NULL) 480 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 481 srv_principal, mech_oid, svc); 482 else { 483 auth = rpc_gss_seccreate_call(nrp->nr_client, cred, 484 clnt_principal, srv_principal, "kerberosv5", 485 svc, NULL, NULL, NULL); 486 return (auth); 487 } 488 if (auth != NULL) 489 return (auth); 490 /* fallthrough */ 491 case AUTH_SYS: 492 default: 493 return (authunix_create(cred)); 494 495 } 496 } 497 498 /* 499 * Callback from the RPC code to generate up/down notifications. 500 */ 501 502 struct nfs_feedback_arg { 503 struct nfsmount *nf_mount; 504 int nf_lastmsg; /* last tprintf */ 505 int nf_tprintfmsg; 506 struct thread *nf_td; 507 }; 508 509 static void 510 nfs_feedback(int type, int proc, void *arg) 511 { 512 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 513 struct nfsmount *nmp = nf->nf_mount; 514 time_t now; 515 516 switch (type) { 517 case FEEDBACK_REXMIT2: 518 case FEEDBACK_RECONNECT: 519 now = NFSD_MONOSEC; 520 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) { 521 nfs_down(nmp, nf->nf_td, 522 "not responding", 0, NFSSTA_TIMEO); 523 nf->nf_tprintfmsg = TRUE; 524 nf->nf_lastmsg = now; 525 } 526 break; 527 528 case FEEDBACK_OK: 529 nfs_up(nf->nf_mount, nf->nf_td, 530 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 531 break; 532 } 533 } 534 535 /* 536 * newnfs_request - goes something like this 537 * - does the rpc by calling the krpc layer 538 * - break down rpc header and return with nfs reply 539 * nb: always frees up nd_mreq mbuf list 540 */ 541 int 542 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 543 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 544 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 545 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep) 546 { 547 uint32_t retseq, retval, slotseq, *tl; 548 int i = 0, j = 0, opcnt, set_sigset = 0, slot; 549 int error = 0, usegssname = 0, secflavour = AUTH_SYS; 550 int freeslot, maxslot, reterr, slotpos, timeo; 551 u_int16_t procnum; 552 struct nfs_feedback_arg nf; 553 struct timeval timo; 554 AUTH *auth; 555 struct rpc_callextra ext; 556 enum clnt_stat stat; 557 struct nfsreq *rep = NULL; 558 char *srv_principal = NULL, *clnt_principal = NULL; 559 sigset_t oldset; 560 struct ucred *authcred; 561 struct nfsclsession *sep; 562 uint8_t sessionid[NFSX_V4SESSIONID]; 563 struct timespec trylater_delay, ts, waituntil; 564 565 /* Initially 1msec. */ 566 trylater_delay.tv_sec = 0; 567 trylater_delay.tv_nsec = 1000000; 568 sep = dssep; 569 if (xidp != NULL) 570 *xidp = 0; 571 /* Reject requests while attempting a forced unmount. */ 572 if (nmp != NULL && NFSCL_FORCEDISM(nmp->nm_mountp)) { 573 m_freem(nd->nd_mreq); 574 return (ESTALE); 575 } 576 577 /* 578 * Set authcred, which is used to acquire RPC credentials to 579 * the cred argument, by default. The crhold() should not be 580 * necessary, but will ensure that some future code change 581 * doesn't result in the credential being free'd prematurely. 582 */ 583 authcred = crhold(cred); 584 585 /* For client side interruptible mounts, mask off the signals. */ 586 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 587 newnfs_set_sigmask(td, &oldset); 588 set_sigset = 1; 589 } 590 591 /* 592 * XXX if not already connected call nfs_connect now. Longer 593 * term, change nfs_mount to call nfs_connect unconditionally 594 * and let clnt_reconnect_create handle reconnects. 595 */ 596 if (nrp->nr_client == NULL) 597 newnfs_connect(nmp, nrp, cred, td, 0); 598 599 /* 600 * For a client side mount, nmp is != NULL and clp == NULL. For 601 * server calls (callbacks or upcalls), nmp == NULL. 602 */ 603 if (clp != NULL) { 604 NFSLOCKSTATE(); 605 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 606 secflavour = RPCSEC_GSS_KRB5; 607 if (nd->nd_procnum != NFSPROC_NULL) { 608 if (clp->lc_flags & LCL_GSSINTEGRITY) 609 secflavour = RPCSEC_GSS_KRB5I; 610 else if (clp->lc_flags & LCL_GSSPRIVACY) 611 secflavour = RPCSEC_GSS_KRB5P; 612 } 613 } 614 NFSUNLOCKSTATE(); 615 } else if (nmp != NULL && NFSHASKERB(nmp) && 616 nd->nd_procnum != NFSPROC_NULL) { 617 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 618 nd->nd_flag |= ND_USEGSSNAME; 619 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 620 /* 621 * If there is a client side host based credential, 622 * use that, otherwise use the system uid, if set. 623 * The system uid is in the nmp->nm_sockreq.nr_cred 624 * credentials. 625 */ 626 if (nmp->nm_krbnamelen > 0) { 627 usegssname = 1; 628 clnt_principal = nmp->nm_krbname; 629 } else if (nmp->nm_uid != (uid_t)-1) { 630 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 631 ("newnfs_request: NULL nr_cred")); 632 crfree(authcred); 633 authcred = crhold(nmp->nm_sockreq.nr_cred); 634 } 635 } else if (nmp->nm_krbnamelen == 0 && 636 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 637 /* 638 * If there is no host based principal name and 639 * the system uid is set and this is root, use the 640 * system uid, since root won't have user 641 * credentials in a credentials cache file. 642 * The system uid is in the nmp->nm_sockreq.nr_cred 643 * credentials. 644 */ 645 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 646 ("newnfs_request: NULL nr_cred")); 647 crfree(authcred); 648 authcred = crhold(nmp->nm_sockreq.nr_cred); 649 } 650 if (NFSHASINTEGRITY(nmp)) 651 secflavour = RPCSEC_GSS_KRB5I; 652 else if (NFSHASPRIVACY(nmp)) 653 secflavour = RPCSEC_GSS_KRB5P; 654 else 655 secflavour = RPCSEC_GSS_KRB5; 656 srv_principal = NFSMNT_SRVKRBNAME(nmp); 657 } else if (nmp != NULL && !NFSHASKERB(nmp) && 658 nd->nd_procnum != NFSPROC_NULL && 659 (nd->nd_flag & ND_USEGSSNAME) != 0) { 660 /* 661 * Use the uid that did the mount when the RPC is doing 662 * NFSv4 system operations, as indicated by the 663 * ND_USEGSSNAME flag, for the AUTH_SYS case. 664 * The credentials in nm_sockreq.nr_cred were used for the 665 * mount. 666 */ 667 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 668 ("newnfs_request: NULL nr_cred")); 669 crfree(authcred); 670 authcred = crhold(nmp->nm_sockreq.nr_cred); 671 } 672 673 if (nmp != NULL) { 674 bzero(&nf, sizeof(struct nfs_feedback_arg)); 675 nf.nf_mount = nmp; 676 nf.nf_td = td; 677 nf.nf_lastmsg = NFSD_MONOSEC - 678 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 679 } 680 681 if (nd->nd_procnum == NFSPROC_NULL) 682 auth = authnone_create(); 683 else if (usegssname) { 684 /* 685 * For this case, the authenticator is held in the 686 * nfssockreq structure, so don't release the reference count 687 * held on it. --> Don't AUTH_DESTROY() it in this function. 688 */ 689 if (nrp->nr_auth == NULL) 690 nrp->nr_auth = nfs_getauth(nrp, secflavour, 691 clnt_principal, srv_principal, NULL, authcred); 692 else 693 rpc_gss_refresh_auth_call(nrp->nr_auth); 694 auth = nrp->nr_auth; 695 } else 696 auth = nfs_getauth(nrp, secflavour, NULL, 697 srv_principal, NULL, authcred); 698 crfree(authcred); 699 if (auth == NULL) { 700 m_freem(nd->nd_mreq); 701 if (set_sigset) 702 newnfs_restore_sigmask(td, &oldset); 703 return (EACCES); 704 } 705 bzero(&ext, sizeof(ext)); 706 ext.rc_auth = auth; 707 if (nmp != NULL) { 708 ext.rc_feedback = nfs_feedback; 709 ext.rc_feedback_arg = &nf; 710 } 711 712 procnum = nd->nd_procnum; 713 if ((nd->nd_flag & ND_NFSV4) && 714 nd->nd_procnum != NFSPROC_NULL && 715 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 716 procnum = NFSV4PROC_COMPOUND; 717 718 if (nmp != NULL) { 719 NFSINCRGLOBAL(nfsstatsv1.rpcrequests); 720 721 /* Map the procnum to the old NFSv2 one, as required. */ 722 if ((nd->nd_flag & ND_NFSV2) != 0) { 723 if (nd->nd_procnum < NFS_V3NPROCS) 724 procnum = nfsv2_procid[nd->nd_procnum]; 725 else 726 procnum = NFSV2PROC_NOOP; 727 } 728 729 /* 730 * Now only used for the R_DONTRECOVER case, but until that is 731 * supported within the krpc code, I need to keep a queue of 732 * outstanding RPCs for nfsv4 client requests. 733 */ 734 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 735 rep = malloc(sizeof(struct nfsreq), 736 M_NFSDREQ, M_WAITOK); 737 #ifdef KDTRACE_HOOKS 738 if (dtrace_nfscl_nfs234_start_probe != NULL) { 739 uint32_t probe_id; 740 int probe_procnum; 741 742 if (nd->nd_flag & ND_NFSV4) { 743 probe_id = 744 nfscl_nfs4_start_probes[nd->nd_procnum]; 745 probe_procnum = nd->nd_procnum; 746 } else if (nd->nd_flag & ND_NFSV3) { 747 probe_id = nfscl_nfs3_start_probes[procnum]; 748 probe_procnum = procnum; 749 } else { 750 probe_id = 751 nfscl_nfs2_start_probes[nd->nd_procnum]; 752 probe_procnum = procnum; 753 } 754 if (probe_id != 0) 755 (dtrace_nfscl_nfs234_start_probe) 756 (probe_id, vp, nd->nd_mreq, cred, 757 probe_procnum); 758 } 759 #endif 760 } 761 freeslot = -1; /* Set to slot that needs to be free'd */ 762 tryagain: 763 slot = -1; /* Slot that needs a sequence# increment. */ 764 /* 765 * This timeout specifies when a new socket should be created, 766 * along with new xid values. For UDP, this should be done 767 * infrequently, since retransmits of RPC requests should normally 768 * use the same xid. 769 */ 770 if (nmp == NULL) { 771 if (clp == NULL) { 772 timo.tv_sec = NFSV4_UPCALLTIMEO; 773 timo.tv_usec = 0; 774 } else { 775 timo.tv_sec = NFSV4_CALLBACKTIMEO / 1000; 776 timo.tv_usec = NFSV4_CALLBACKTIMEO * 1000; 777 } 778 } else { 779 if (nrp->nr_sotype != SOCK_DGRAM) { 780 timo.tv_usec = 0; 781 if ((nmp->nm_flag & NFSMNT_NFSV4)) 782 timo.tv_sec = INT_MAX; 783 else 784 timo.tv_sec = NFS_TCPTIMEO; 785 } else { 786 if (NFSHASSOFT(nmp)) { 787 /* 788 * CLSET_RETRIES is set to 2, so this should be 789 * half of the total timeout required. 790 */ 791 timeo = nmp->nm_retry * nmp->nm_timeo / 2; 792 if (timeo < 1) 793 timeo = 1; 794 timo.tv_sec = timeo / NFS_HZ; 795 timo.tv_usec = (timeo % NFS_HZ) * 1000000 / 796 NFS_HZ; 797 } else { 798 /* For UDP hard mounts, use a large value. */ 799 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ; 800 timo.tv_usec = 0; 801 } 802 } 803 804 if (rep != NULL) { 805 rep->r_flags = 0; 806 rep->r_nmp = nmp; 807 /* 808 * Chain request into list of outstanding requests. 809 */ 810 NFSLOCKREQ(); 811 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 812 NFSUNLOCKREQ(); 813 } 814 } 815 816 nd->nd_mrep = NULL; 817 if (clp != NULL && sep != NULL) 818 stat = clnt_bck_call(nrp->nr_client, &ext, procnum, 819 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt); 820 else 821 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, 822 nd->nd_mreq, &nd->nd_mrep, timo); 823 NFSCL_DEBUG(2, "clnt call=%d\n", stat); 824 825 if (rep != NULL) { 826 /* 827 * RPC done, unlink the request. 828 */ 829 NFSLOCKREQ(); 830 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 831 NFSUNLOCKREQ(); 832 } 833 834 /* 835 * If there was a successful reply and a tprintf msg. 836 * tprintf a response. 837 */ 838 if (stat == RPC_SUCCESS) { 839 error = 0; 840 } else if (stat == RPC_TIMEDOUT) { 841 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts); 842 error = ETIMEDOUT; 843 } else if (stat == RPC_VERSMISMATCH) { 844 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 845 error = EOPNOTSUPP; 846 } else if (stat == RPC_PROGVERSMISMATCH) { 847 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 848 error = EPROTONOSUPPORT; 849 } else if (stat == RPC_INTR) { 850 error = EINTR; 851 } else if (stat == RPC_CANTSEND || stat == RPC_CANTRECV || 852 stat == RPC_SYSTEMERROR) { 853 /* Check for a session slot that needs to be free'd. */ 854 if ((nd->nd_flag & (ND_NFSV41 | ND_HASSLOTID)) == 855 (ND_NFSV41 | ND_HASSLOTID) && nmp != NULL && 856 nd->nd_procnum != NFSPROC_NULL) { 857 /* 858 * This should only occur when either the MDS or 859 * a client has an RPC against a DS fail. 860 * This happens because these cases use "soft" 861 * connections that can time out and fail. 862 * The slot used for this RPC is now in a 863 * non-deterministic state, but if the slot isn't 864 * free'd, threads can get stuck waiting for a slot. 865 */ 866 if (sep == NULL) 867 sep = nfsmnt_mdssession(nmp); 868 /* 869 * Bump the sequence# out of range, so that reuse of 870 * this slot will result in an NFSERR_SEQMISORDERED 871 * error and not a bogus cached RPC reply. 872 */ 873 mtx_lock(&sep->nfsess_mtx); 874 sep->nfsess_slotseq[nd->nd_slotid] += 10; 875 mtx_unlock(&sep->nfsess_mtx); 876 /* And free the slot. */ 877 nfsv4_freeslot(sep, nd->nd_slotid, false); 878 } 879 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 880 error = ENXIO; 881 } else { 882 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 883 error = EACCES; 884 } 885 if (error) { 886 m_freem(nd->nd_mreq); 887 if (usegssname == 0) 888 AUTH_DESTROY(auth); 889 if (rep != NULL) 890 free(rep, M_NFSDREQ); 891 if (set_sigset) 892 newnfs_restore_sigmask(td, &oldset); 893 return (error); 894 } 895 896 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 897 898 /* 899 * Search for any mbufs that are not a multiple of 4 bytes long 900 * or with m_data not longword aligned. 901 * These could cause pointer alignment problems, so copy them to 902 * well aligned mbufs. 903 */ 904 newnfs_realign(&nd->nd_mrep, M_WAITOK); 905 nd->nd_md = nd->nd_mrep; 906 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 907 nd->nd_repstat = 0; 908 if (nd->nd_procnum != NFSPROC_NULL && 909 nd->nd_procnum != NFSV4PROC_CBNULL) { 910 /* If sep == NULL, set it to the default in nmp. */ 911 if (sep == NULL && nmp != NULL) 912 sep = nfsmnt_mdssession(nmp); 913 /* 914 * and now the actual NFS xdr. 915 */ 916 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 917 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 918 if (nd->nd_repstat >= 10000) 919 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum, 920 (int)nd->nd_repstat); 921 922 /* 923 * Get rid of the tag, return count and SEQUENCE result for 924 * NFSv4. 925 */ 926 if ((nd->nd_flag & ND_NFSV4) != 0 && nd->nd_repstat != 927 NFSERR_MINORVERMISMATCH) { 928 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 929 i = fxdr_unsigned(int, *tl); 930 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 931 if (error) 932 goto nfsmout; 933 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 934 opcnt = fxdr_unsigned(int, *tl++); 935 i = fxdr_unsigned(int, *tl++); 936 j = fxdr_unsigned(int, *tl); 937 if (j >= 10000) 938 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j); 939 /* 940 * If the first op is Sequence, free up the slot. 941 */ 942 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) || 943 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0)) 944 NFSCL_DEBUG(1, "failed seq=%d\n", j); 945 if (((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) || 946 (clp != NULL && i == NFSV4OP_CBSEQUENCE && 947 j == 0)) && sep != NULL) { 948 if (i == NFSV4OP_SEQUENCE) 949 NFSM_DISSECT(tl, uint32_t *, 950 NFSX_V4SESSIONID + 951 5 * NFSX_UNSIGNED); 952 else 953 NFSM_DISSECT(tl, uint32_t *, 954 NFSX_V4SESSIONID + 955 4 * NFSX_UNSIGNED); 956 mtx_lock(&sep->nfsess_mtx); 957 if (bcmp(tl, sep->nfsess_sessionid, 958 NFSX_V4SESSIONID) == 0) { 959 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 960 retseq = fxdr_unsigned(uint32_t, *tl++); 961 slot = fxdr_unsigned(int, *tl++); 962 if ((nd->nd_flag & ND_HASSLOTID) != 0) { 963 if (slot != nd->nd_slotid) { 964 printf("newnfs_request:" 965 " Wrong session " 966 "slot=%d\n", slot); 967 slot = nd->nd_slotid; 968 } 969 freeslot = slot; 970 } else if (slot != 0) { 971 printf("newnfs_request: Bad " 972 "session slot=%d\n", slot); 973 slot = 0; 974 } 975 if (retseq != sep->nfsess_slotseq[slot]) 976 printf("retseq diff 0x%x\n", 977 retseq); 978 retval = fxdr_unsigned(uint32_t, *++tl); 979 if ((retval + 1) < sep->nfsess_foreslots 980 ) 981 sep->nfsess_foreslots = (retval 982 + 1); 983 else if ((retval + 1) > 984 sep->nfsess_foreslots) 985 sep->nfsess_foreslots = (retval 986 < 64) ? (retval + 1) : 64; 987 } 988 mtx_unlock(&sep->nfsess_mtx); 989 990 /* Grab the op and status for the next one. */ 991 if (opcnt > 1) { 992 NFSM_DISSECT(tl, uint32_t *, 993 2 * NFSX_UNSIGNED); 994 i = fxdr_unsigned(int, *tl++); 995 j = fxdr_unsigned(int, *tl); 996 } 997 } 998 } 999 if (nd->nd_repstat != 0) { 1000 if (nd->nd_repstat == NFSERR_BADSESSION && 1001 nmp != NULL && dssep == NULL && 1002 (nd->nd_flag & ND_NFSV41) != 0) { 1003 /* 1004 * If this is a client side MDS RPC, mark 1005 * the MDS session defunct and initiate 1006 * recovery, as required. 1007 * The nfsess_defunct field is protected by 1008 * the NFSLOCKMNT()/nm_mtx lock and not the 1009 * nfsess_mtx lock to simplify its handling, 1010 * for the MDS session. This lock is also 1011 * sufficient for nfsess_sessionid, since it 1012 * never changes in the structure. 1013 */ 1014 NFSCL_DEBUG(1, "Got badsession\n"); 1015 NFSLOCKCLSTATE(); 1016 NFSLOCKMNT(nmp); 1017 sep = NFSMNT_MDSSESSION(nmp); 1018 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence, 1019 NFSX_V4SESSIONID) == 0) { 1020 printf("Initiate recovery. If server " 1021 "has not rebooted, " 1022 "check NFS clients for unique " 1023 "/etc/hostid's\n"); 1024 /* Initiate recovery. */ 1025 sep->nfsess_defunct = 1; 1026 NFSCL_DEBUG(1, "Marked defunct\n"); 1027 if (nmp->nm_clp != NULL) { 1028 nmp->nm_clp->nfsc_flags |= 1029 NFSCLFLAGS_RECOVER; 1030 wakeup(nmp->nm_clp); 1031 } 1032 } 1033 NFSUNLOCKCLSTATE(); 1034 /* 1035 * Sleep for up to 1sec waiting for a new 1036 * session. 1037 */ 1038 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO, 1039 "nfsbadsess", hz); 1040 /* 1041 * Get the session again, in case a new one 1042 * has been created during the sleep. 1043 */ 1044 sep = NFSMNT_MDSSESSION(nmp); 1045 NFSUNLOCKMNT(nmp); 1046 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) { 1047 reterr = nfsv4_sequencelookup(nmp, sep, 1048 &slotpos, &maxslot, &slotseq, 1049 sessionid); 1050 if (reterr == 0) { 1051 /* Fill in new session info. */ 1052 NFSCL_DEBUG(1, 1053 "Filling in new sequence\n"); 1054 tl = nd->nd_sequence; 1055 bcopy(sessionid, tl, 1056 NFSX_V4SESSIONID); 1057 tl += NFSX_V4SESSIONID / 1058 NFSX_UNSIGNED; 1059 *tl++ = txdr_unsigned(slotseq); 1060 *tl++ = txdr_unsigned(slotpos); 1061 *tl = txdr_unsigned(maxslot); 1062 nd->nd_slotid = slotpos; 1063 nd->nd_flag |= ND_HASSLOTID; 1064 } 1065 if (reterr == NFSERR_BADSESSION || 1066 reterr == 0) { 1067 NFSCL_DEBUG(1, 1068 "Badsession looping\n"); 1069 m_freem(nd->nd_mrep); 1070 nd->nd_mrep = NULL; 1071 goto tryagain; 1072 } 1073 nd->nd_repstat = reterr; 1074 NFSCL_DEBUG(1, "Got err=%d\n", reterr); 1075 } 1076 } 1077 /* 1078 * When clp != NULL, it is a callback and all 1079 * callback operations can be retried for NFSERR_DELAY. 1080 */ 1081 if (((nd->nd_repstat == NFSERR_DELAY || 1082 nd->nd_repstat == NFSERR_GRACE) && 1083 (nd->nd_flag & ND_NFSV4) && (clp != NULL || 1084 (nd->nd_procnum != NFSPROC_DELEGRETURN && 1085 nd->nd_procnum != NFSPROC_SETATTR && 1086 nd->nd_procnum != NFSPROC_READ && 1087 nd->nd_procnum != NFSPROC_READDS && 1088 nd->nd_procnum != NFSPROC_WRITE && 1089 nd->nd_procnum != NFSPROC_WRITEDS && 1090 nd->nd_procnum != NFSPROC_OPEN && 1091 nd->nd_procnum != NFSPROC_OPENLAYGET && 1092 nd->nd_procnum != NFSPROC_CREATE && 1093 nd->nd_procnum != NFSPROC_CREATELAYGET && 1094 nd->nd_procnum != NFSPROC_OPENCONFIRM && 1095 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 1096 nd->nd_procnum != NFSPROC_CLOSE && 1097 nd->nd_procnum != NFSPROC_LOCK && 1098 nd->nd_procnum != NFSPROC_LOCKU))) || 1099 (nd->nd_repstat == NFSERR_DELAY && 1100 (nd->nd_flag & ND_NFSV4) == 0) || 1101 nd->nd_repstat == NFSERR_RESOURCE) { 1102 /* Clip at NFS_TRYLATERDEL. */ 1103 if (timespeccmp(&trylater_delay, 1104 &nfs_trylater_max, >)) 1105 trylater_delay = nfs_trylater_max; 1106 getnanouptime(&waituntil); 1107 timespecadd(&waituntil, &trylater_delay, 1108 &waituntil); 1109 do { 1110 nfs_catnap(PZERO, 0, "nfstry"); 1111 getnanouptime(&ts); 1112 } while (timespeccmp(&ts, &waituntil, <)); 1113 timespecadd(&trylater_delay, &trylater_delay, 1114 &trylater_delay); /* Double each time. */ 1115 if (slot != -1) { 1116 mtx_lock(&sep->nfsess_mtx); 1117 sep->nfsess_slotseq[slot]++; 1118 *nd->nd_slotseq = txdr_unsigned( 1119 sep->nfsess_slotseq[slot]); 1120 mtx_unlock(&sep->nfsess_mtx); 1121 } 1122 m_freem(nd->nd_mrep); 1123 nd->nd_mrep = NULL; 1124 goto tryagain; 1125 } 1126 1127 /* 1128 * If the File Handle was stale, invalidate the 1129 * lookup cache, just in case. 1130 * (vp != NULL implies a client side call) 1131 */ 1132 if (nd->nd_repstat == ESTALE && vp != NULL) { 1133 cache_purge(vp); 1134 if (ncl_call_invalcaches != NULL) 1135 (*ncl_call_invalcaches)(vp); 1136 } 1137 } 1138 if ((nd->nd_flag & ND_NFSV4) != 0) { 1139 /* Free the slot, as required. */ 1140 if (freeslot != -1) 1141 nfsv4_freeslot(sep, freeslot, false); 1142 /* 1143 * If this op is Putfh, throw its results away. 1144 */ 1145 if (j >= 10000) 1146 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j); 1147 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) { 1148 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 1149 i = fxdr_unsigned(int, *tl++); 1150 j = fxdr_unsigned(int, *tl); 1151 if (j >= 10000) 1152 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i, 1153 j); 1154 /* 1155 * All Compounds that do an Op that must 1156 * be in sequence consist of NFSV4OP_PUTFH 1157 * followed by one of these. As such, we 1158 * can determine if the seqid# should be 1159 * incremented, here. 1160 */ 1161 if ((i == NFSV4OP_OPEN || 1162 i == NFSV4OP_OPENCONFIRM || 1163 i == NFSV4OP_OPENDOWNGRADE || 1164 i == NFSV4OP_CLOSE || 1165 i == NFSV4OP_LOCK || 1166 i == NFSV4OP_LOCKU) && 1167 (j == 0 || 1168 (j != NFSERR_STALECLIENTID && 1169 j != NFSERR_STALESTATEID && 1170 j != NFSERR_BADSTATEID && 1171 j != NFSERR_BADSEQID && 1172 j != NFSERR_BADXDR && 1173 j != NFSERR_RESOURCE && 1174 j != NFSERR_NOFILEHANDLE))) 1175 nd->nd_flag |= ND_INCRSEQID; 1176 } 1177 /* 1178 * If this op's status is non-zero, mark 1179 * that there is no more data to process. 1180 * The exception is Setattr, which always has xdr 1181 * when it has failed. 1182 */ 1183 if (j != 0 && i != NFSV4OP_SETATTR) 1184 nd->nd_flag |= ND_NOMOREDATA; 1185 1186 /* 1187 * If R_DONTRECOVER is set, replace the stale error 1188 * reply, so that recovery isn't initiated. 1189 */ 1190 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 1191 nd->nd_repstat == NFSERR_BADSESSION || 1192 nd->nd_repstat == NFSERR_STALESTATEID) && 1193 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 1194 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 1195 } 1196 } 1197 1198 #ifdef KDTRACE_HOOKS 1199 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 1200 uint32_t probe_id; 1201 int probe_procnum; 1202 1203 if (nd->nd_flag & ND_NFSV4) { 1204 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 1205 probe_procnum = nd->nd_procnum; 1206 } else if (nd->nd_flag & ND_NFSV3) { 1207 probe_id = nfscl_nfs3_done_probes[procnum]; 1208 probe_procnum = procnum; 1209 } else { 1210 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 1211 probe_procnum = procnum; 1212 } 1213 if (probe_id != 0) 1214 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 1215 nd->nd_mreq, cred, probe_procnum, 0); 1216 } 1217 #endif 1218 1219 m_freem(nd->nd_mreq); 1220 if (usegssname == 0) 1221 AUTH_DESTROY(auth); 1222 if (rep != NULL) 1223 free(rep, M_NFSDREQ); 1224 if (set_sigset) 1225 newnfs_restore_sigmask(td, &oldset); 1226 return (0); 1227 nfsmout: 1228 mbuf_freem(nd->nd_mrep); 1229 mbuf_freem(nd->nd_mreq); 1230 if (usegssname == 0) 1231 AUTH_DESTROY(auth); 1232 if (rep != NULL) 1233 free(rep, M_NFSDREQ); 1234 if (set_sigset) 1235 newnfs_restore_sigmask(td, &oldset); 1236 return (error); 1237 } 1238 1239 /* 1240 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 1241 * wait for all requests to complete. This is used by forced unmounts 1242 * to terminate any outstanding RPCs. 1243 */ 1244 int 1245 newnfs_nmcancelreqs(struct nfsmount *nmp) 1246 { 1247 struct nfsclds *dsp; 1248 struct __rpc_client *cl; 1249 1250 if (nmp->nm_sockreq.nr_client != NULL) 1251 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 1252 lookformore: 1253 NFSLOCKMNT(nmp); 1254 TAILQ_FOREACH(dsp, &nmp->nm_sess, nfsclds_list) { 1255 NFSLOCKDS(dsp); 1256 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1257 (dsp->nfsclds_flags & NFSCLDS_CLOSED) == 0 && 1258 dsp->nfsclds_sockp != NULL && 1259 dsp->nfsclds_sockp->nr_client != NULL) { 1260 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 1261 cl = dsp->nfsclds_sockp->nr_client; 1262 NFSUNLOCKDS(dsp); 1263 NFSUNLOCKMNT(nmp); 1264 CLNT_CLOSE(cl); 1265 goto lookformore; 1266 } 1267 NFSUNLOCKDS(dsp); 1268 } 1269 NFSUNLOCKMNT(nmp); 1270 return (0); 1271 } 1272 1273 /* 1274 * Any signal that can interrupt an NFS operation in an intr mount 1275 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 1276 */ 1277 int newnfs_sig_set[] = { 1278 SIGINT, 1279 SIGTERM, 1280 SIGHUP, 1281 SIGKILL, 1282 SIGQUIT 1283 }; 1284 1285 /* 1286 * Check to see if one of the signals in our subset is pending on 1287 * the process (in an intr mount). 1288 */ 1289 static int 1290 nfs_sig_pending(sigset_t set) 1291 { 1292 int i; 1293 1294 for (i = 0 ; i < nitems(newnfs_sig_set); i++) 1295 if (SIGISMEMBER(set, newnfs_sig_set[i])) 1296 return (1); 1297 return (0); 1298 } 1299 1300 /* 1301 * The set/restore sigmask functions are used to (temporarily) overwrite 1302 * the thread td_sigmask during an RPC call (for example). These are also 1303 * used in other places in the NFS client that might tsleep(). 1304 */ 1305 void 1306 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 1307 { 1308 sigset_t newset; 1309 int i; 1310 struct proc *p; 1311 1312 SIGFILLSET(newset); 1313 if (td == NULL) 1314 td = curthread; /* XXX */ 1315 p = td->td_proc; 1316 /* Remove the NFS set of signals from newset */ 1317 PROC_LOCK(p); 1318 mtx_lock(&p->p_sigacts->ps_mtx); 1319 for (i = 0 ; i < nitems(newnfs_sig_set); i++) { 1320 /* 1321 * But make sure we leave the ones already masked 1322 * by the process, ie. remove the signal from the 1323 * temporary signalmask only if it wasn't already 1324 * in p_sigmask. 1325 */ 1326 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 1327 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 1328 SIGDELSET(newset, newnfs_sig_set[i]); 1329 } 1330 mtx_unlock(&p->p_sigacts->ps_mtx); 1331 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 1332 SIGPROCMASK_PROC_LOCKED); 1333 PROC_UNLOCK(p); 1334 } 1335 1336 void 1337 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 1338 { 1339 if (td == NULL) 1340 td = curthread; /* XXX */ 1341 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 1342 } 1343 1344 /* 1345 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 1346 * old one after msleep() returns. 1347 */ 1348 int 1349 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 1350 { 1351 sigset_t oldset; 1352 int error; 1353 1354 if ((priority & PCATCH) == 0) 1355 return msleep(ident, mtx, priority, wmesg, timo); 1356 if (td == NULL) 1357 td = curthread; /* XXX */ 1358 newnfs_set_sigmask(td, &oldset); 1359 error = msleep(ident, mtx, priority, wmesg, timo); 1360 newnfs_restore_sigmask(td, &oldset); 1361 return (error); 1362 } 1363 1364 /* 1365 * Test for a termination condition pending on the process. 1366 * This is used for NFSMNT_INT mounts. 1367 */ 1368 int 1369 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 1370 { 1371 struct proc *p; 1372 sigset_t tmpset; 1373 1374 /* Terminate all requests while attempting a forced unmount. */ 1375 if (NFSCL_FORCEDISM(nmp->nm_mountp)) 1376 return (EIO); 1377 if (!(nmp->nm_flag & NFSMNT_INT)) 1378 return (0); 1379 if (td == NULL) 1380 return (0); 1381 p = td->td_proc; 1382 PROC_LOCK(p); 1383 tmpset = p->p_siglist; 1384 SIGSETOR(tmpset, td->td_siglist); 1385 SIGSETNAND(tmpset, td->td_sigmask); 1386 mtx_lock(&p->p_sigacts->ps_mtx); 1387 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 1388 mtx_unlock(&p->p_sigacts->ps_mtx); 1389 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 1390 && nfs_sig_pending(tmpset)) { 1391 PROC_UNLOCK(p); 1392 return (EINTR); 1393 } 1394 PROC_UNLOCK(p); 1395 return (0); 1396 } 1397 1398 static int 1399 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1400 { 1401 struct proc *p; 1402 1403 p = td ? td->td_proc : NULL; 1404 if (error) { 1405 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n", 1406 server, msg, error); 1407 } else { 1408 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg); 1409 } 1410 return (0); 1411 } 1412 1413 static void 1414 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1415 int error, int flags) 1416 { 1417 if (nmp == NULL) 1418 return; 1419 mtx_lock(&nmp->nm_mtx); 1420 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1421 nmp->nm_state |= NFSSTA_TIMEO; 1422 mtx_unlock(&nmp->nm_mtx); 1423 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1424 VQ_NOTRESP, 0); 1425 } else 1426 mtx_unlock(&nmp->nm_mtx); 1427 mtx_lock(&nmp->nm_mtx); 1428 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1429 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1430 mtx_unlock(&nmp->nm_mtx); 1431 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1432 VQ_NOTRESPLOCK, 0); 1433 } else 1434 mtx_unlock(&nmp->nm_mtx); 1435 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1436 } 1437 1438 static void 1439 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1440 int flags, int tprintfmsg) 1441 { 1442 if (nmp == NULL) 1443 return; 1444 if (tprintfmsg) { 1445 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1446 } 1447 1448 mtx_lock(&nmp->nm_mtx); 1449 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1450 nmp->nm_state &= ~NFSSTA_TIMEO; 1451 mtx_unlock(&nmp->nm_mtx); 1452 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1453 VQ_NOTRESP, 1); 1454 } else 1455 mtx_unlock(&nmp->nm_mtx); 1456 1457 mtx_lock(&nmp->nm_mtx); 1458 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1459 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1460 mtx_unlock(&nmp->nm_mtx); 1461 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1462 VQ_NOTRESPLOCK, 1); 1463 } else 1464 mtx_unlock(&nmp->nm_mtx); 1465 } 1466
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