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