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) 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) { 237 td->td_ucred = origcred; 238 goto out; 239 } 240 do { 241 if (error != 0 && pktscale > 2) { 242 if (nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 243 pktscale == pktscalesav) 244 printf("Consider increasing kern.ipc.maxsockbuf\n"); 245 pktscale--; 246 } 247 if (nrp->nr_sotype == SOCK_DGRAM) { 248 if (nmp != NULL) { 249 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 250 pktscale; 251 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 252 pktscale; 253 } else { 254 sndreserve = rcvreserve = 1024 * pktscale; 255 } 256 } else { 257 if (nrp->nr_sotype != SOCK_STREAM) 258 panic("nfscon sotype"); 259 if (nmp != NULL) { 260 sndreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 261 sizeof (u_int32_t)) * pktscale; 262 rcvreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 263 sizeof (u_int32_t)) * pktscale; 264 } else { 265 sndreserve = rcvreserve = 1024 * pktscale; 266 } 267 } 268 error = soreserve(so, sndreserve, rcvreserve); 269 if (error != 0 && nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 270 pktscale <= 2) 271 printf("Must increase kern.ipc.maxsockbuf or reduce" 272 " rsize, wsize\n"); 273 } while (error != 0 && pktscale > 2); 274 soclose(so); 275 if (error) { 276 td->td_ucred = origcred; 277 goto out; 278 } 279 280 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 281 nrp->nr_vers, sndreserve, rcvreserve); 282 CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq"); 283 if (nmp != NULL) { 284 if ((nmp->nm_flag & NFSMNT_INT)) 285 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 286 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 287 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 288 if (NFSHASSOFT(nmp)) { 289 if (nmp->nm_sotype == SOCK_DGRAM) 290 /* 291 * For UDP, the large timeout for a reconnect 292 * will be set to "nm_retry * nm_timeo / 2", so 293 * we only want to do 2 reconnect timeout 294 * retries. 295 */ 296 retries = 2; 297 else 298 retries = nmp->nm_retry; 299 } else 300 retries = INT_MAX; 301 if (NFSHASNFSV4N(nmp)) { 302 if (cred != NULL) { 303 if (NFSHASSOFT(nmp)) { 304 /* 305 * This should be a DS mount. 306 * Use CLSET_TIMEOUT to set the timeout 307 * for connections to DSs instead of 308 * specifying a timeout on each RPC. 309 * This is done so that SO_SNDTIMEO 310 * is set on the TCP socket as well 311 * as specifying a time limit when 312 * waiting for an RPC reply. Useful 313 * if the send queue for the TCP 314 * connection has become constipated, 315 * due to a failed DS. 316 * The choice of lease_duration / 4 is 317 * fairly arbitrary, but seems to work 318 * ok, with a lower bound of 10sec. 319 */ 320 timo.tv_sec = nfsrv_lease / 4; 321 if (timo.tv_sec < 10) 322 timo.tv_sec = 10; 323 timo.tv_usec = 0; 324 CLNT_CONTROL(client, CLSET_TIMEOUT, 325 &timo); 326 } 327 /* 328 * Make sure the nfscbd_pool doesn't get 329 * destroyed while doing this. 330 */ 331 NFSD_LOCK(); 332 if (nfs_numnfscbd > 0) { 333 nfs_numnfscbd++; 334 NFSD_UNLOCK(); 335 xprt = svc_vc_create_backchannel( 336 nfscbd_pool); 337 CLNT_CONTROL(client, CLSET_BACKCHANNEL, 338 xprt); 339 NFSD_LOCK(); 340 nfs_numnfscbd--; 341 if (nfs_numnfscbd == 0) 342 wakeup(&nfs_numnfscbd); 343 } 344 NFSD_UNLOCK(); 345 } else { 346 /* 347 * cred == NULL for a DS connect. 348 * For connects to a DS, set a retry limit 349 * so that failed DSs will be detected. 350 * This is ok for NFSv4.1, since a DS does 351 * not maintain open/lock state and is the 352 * only case where using a "soft" mount is 353 * recommended for NFSv4. 354 * For mounts from the MDS to DS, this is done 355 * via mount options, but that is not the case 356 * here. The retry limit here can be adjusted 357 * via the sysctl vfs.nfs.dsretries. 358 * See the comment above w.r.t. timeout. 359 */ 360 timo.tv_sec = nfsrv_lease / 4; 361 if (timo.tv_sec < 10) 362 timo.tv_sec = 10; 363 timo.tv_usec = 0; 364 CLNT_CONTROL(client, CLSET_TIMEOUT, &timo); 365 retries = nfs_dsretries; 366 } 367 } 368 } else { 369 /* 370 * Three cases: 371 * - Null RPC callback to client 372 * - Non-Null RPC callback to client, wait a little longer 373 * - upcalls to nfsuserd and gssd (clp == NULL) 374 */ 375 if (callback_retry_mult == 0) { 376 retries = NFSV4_UPCALLRETRY; 377 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 378 } else { 379 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 380 } 381 } 382 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 383 384 if (nmp != NULL) { 385 /* 386 * For UDP, there are 2 timeouts: 387 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer 388 * that does a retransmit of an RPC request using the same 389 * socket and xid. This is what you normally want to do, 390 * since NFS servers depend on "same xid" for their 391 * Duplicate Request Cache. 392 * - timeout specified in CLNT_CALL_MBUF(), which specifies when 393 * retransmits on the same socket should fail and a fresh 394 * socket created. Each of these timeouts counts as one 395 * CLSET_RETRIES as set above. 396 * Set the initial retransmit timeout for UDP. This timeout 397 * doesn't exist for TCP and the following call just fails, 398 * which is ok. 399 */ 400 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 401 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ; 402 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo); 403 } 404 405 mtx_lock(&nrp->nr_mtx); 406 if (nrp->nr_client != NULL) { 407 mtx_unlock(&nrp->nr_mtx); 408 /* 409 * Someone else already connected. 410 */ 411 CLNT_RELEASE(client); 412 } else { 413 nrp->nr_client = client; 414 /* 415 * Protocols that do not require connections may be optionally 416 * left unconnected for servers that reply from a port other 417 * than NFS_PORT. 418 */ 419 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 420 mtx_unlock(&nrp->nr_mtx); 421 CLNT_CONTROL(client, CLSET_CONNECT, &one); 422 } else 423 mtx_unlock(&nrp->nr_mtx); 424 } 425 426 427 /* Restore current thread's credentials. */ 428 td->td_ucred = origcred; 429 430 out: 431 NFSEXITCODE(error); 432 return (error); 433 } 434 435 /* 436 * NFS disconnect. Clean up and unlink. 437 */ 438 void 439 newnfs_disconnect(struct nfssockreq *nrp) 440 { 441 CLIENT *client; 442 443 mtx_lock(&nrp->nr_mtx); 444 if (nrp->nr_client != NULL) { 445 client = nrp->nr_client; 446 nrp->nr_client = NULL; 447 mtx_unlock(&nrp->nr_mtx); 448 rpc_gss_secpurge_call(client); 449 CLNT_CLOSE(client); 450 CLNT_RELEASE(client); 451 } else { 452 mtx_unlock(&nrp->nr_mtx); 453 } 454 } 455 456 static AUTH * 457 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 458 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 459 { 460 rpc_gss_service_t svc; 461 AUTH *auth; 462 463 switch (secflavour) { 464 case RPCSEC_GSS_KRB5: 465 case RPCSEC_GSS_KRB5I: 466 case RPCSEC_GSS_KRB5P: 467 if (!mech_oid) { 468 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 469 return (NULL); 470 } 471 if (secflavour == RPCSEC_GSS_KRB5) 472 svc = rpc_gss_svc_none; 473 else if (secflavour == RPCSEC_GSS_KRB5I) 474 svc = rpc_gss_svc_integrity; 475 else 476 svc = rpc_gss_svc_privacy; 477 478 if (clnt_principal == NULL) 479 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 480 srv_principal, mech_oid, svc); 481 else { 482 auth = rpc_gss_seccreate_call(nrp->nr_client, cred, 483 clnt_principal, srv_principal, "kerberosv5", 484 svc, NULL, NULL, NULL); 485 return (auth); 486 } 487 if (auth != NULL) 488 return (auth); 489 /* fallthrough */ 490 case AUTH_SYS: 491 default: 492 return (authunix_create(cred)); 493 494 } 495 } 496 497 /* 498 * Callback from the RPC code to generate up/down notifications. 499 */ 500 501 struct nfs_feedback_arg { 502 struct nfsmount *nf_mount; 503 int nf_lastmsg; /* last tprintf */ 504 int nf_tprintfmsg; 505 struct thread *nf_td; 506 }; 507 508 static void 509 nfs_feedback(int type, int proc, void *arg) 510 { 511 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 512 struct nfsmount *nmp = nf->nf_mount; 513 time_t now; 514 515 switch (type) { 516 case FEEDBACK_REXMIT2: 517 case FEEDBACK_RECONNECT: 518 now = NFSD_MONOSEC; 519 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) { 520 nfs_down(nmp, nf->nf_td, 521 "not responding", 0, NFSSTA_TIMEO); 522 nf->nf_tprintfmsg = TRUE; 523 nf->nf_lastmsg = now; 524 } 525 break; 526 527 case FEEDBACK_OK: 528 nfs_up(nf->nf_mount, nf->nf_td, 529 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 530 break; 531 } 532 } 533 534 /* 535 * newnfs_request - goes something like this 536 * - does the rpc by calling the krpc layer 537 * - break down rpc header and return with nfs reply 538 * nb: always frees up nd_mreq mbuf list 539 */ 540 int 541 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 542 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 543 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 544 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep) 545 { 546 uint32_t retseq, retval, slotseq, *tl; 547 time_t waituntil; 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 u_int trylater_delay = 1; 553 struct nfs_feedback_arg nf; 554 struct timeval timo; 555 AUTH *auth; 556 struct rpc_callextra ext; 557 enum clnt_stat stat; 558 struct nfsreq *rep = NULL; 559 char *srv_principal = NULL, *clnt_principal = NULL; 560 sigset_t oldset; 561 struct ucred *authcred; 562 struct nfsclsession *sep; 563 uint8_t sessionid[NFSX_V4SESSIONID]; 564 565 sep = dssep; 566 if (xidp != NULL) 567 *xidp = 0; 568 /* Reject requests while attempting a forced unmount. */ 569 if (nmp != NULL && NFSCL_FORCEDISM(nmp->nm_mountp)) { 570 m_freem(nd->nd_mreq); 571 return (ESTALE); 572 } 573 574 /* 575 * Set authcred, which is used to acquire RPC credentials to 576 * the cred argument, by default. The crhold() should not be 577 * necessary, but will ensure that some future code change 578 * doesn't result in the credential being free'd prematurely. 579 */ 580 authcred = crhold(cred); 581 582 /* For client side interruptible mounts, mask off the signals. */ 583 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 584 newnfs_set_sigmask(td, &oldset); 585 set_sigset = 1; 586 } 587 588 /* 589 * XXX if not already connected call nfs_connect now. Longer 590 * term, change nfs_mount to call nfs_connect unconditionally 591 * and let clnt_reconnect_create handle reconnects. 592 */ 593 if (nrp->nr_client == NULL) 594 newnfs_connect(nmp, nrp, cred, td, 0); 595 596 /* 597 * For a client side mount, nmp is != NULL and clp == NULL. For 598 * server calls (callbacks or upcalls), nmp == NULL. 599 */ 600 if (clp != NULL) { 601 NFSLOCKSTATE(); 602 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 603 secflavour = RPCSEC_GSS_KRB5; 604 if (nd->nd_procnum != NFSPROC_NULL) { 605 if (clp->lc_flags & LCL_GSSINTEGRITY) 606 secflavour = RPCSEC_GSS_KRB5I; 607 else if (clp->lc_flags & LCL_GSSPRIVACY) 608 secflavour = RPCSEC_GSS_KRB5P; 609 } 610 } 611 NFSUNLOCKSTATE(); 612 } else if (nmp != NULL && NFSHASKERB(nmp) && 613 nd->nd_procnum != NFSPROC_NULL) { 614 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 615 nd->nd_flag |= ND_USEGSSNAME; 616 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 617 /* 618 * If there is a client side host based credential, 619 * use that, otherwise use the system uid, if set. 620 * The system uid is in the nmp->nm_sockreq.nr_cred 621 * credentials. 622 */ 623 if (nmp->nm_krbnamelen > 0) { 624 usegssname = 1; 625 clnt_principal = nmp->nm_krbname; 626 } else if (nmp->nm_uid != (uid_t)-1) { 627 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 628 ("newnfs_request: NULL nr_cred")); 629 crfree(authcred); 630 authcred = crhold(nmp->nm_sockreq.nr_cred); 631 } 632 } else if (nmp->nm_krbnamelen == 0 && 633 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 634 /* 635 * If there is no host based principal name and 636 * the system uid is set and this is root, use the 637 * system uid, since root won't have user 638 * credentials in a credentials cache file. 639 * The system uid is in the nmp->nm_sockreq.nr_cred 640 * credentials. 641 */ 642 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 643 ("newnfs_request: NULL nr_cred")); 644 crfree(authcred); 645 authcred = crhold(nmp->nm_sockreq.nr_cred); 646 } 647 if (NFSHASINTEGRITY(nmp)) 648 secflavour = RPCSEC_GSS_KRB5I; 649 else if (NFSHASPRIVACY(nmp)) 650 secflavour = RPCSEC_GSS_KRB5P; 651 else 652 secflavour = RPCSEC_GSS_KRB5; 653 srv_principal = NFSMNT_SRVKRBNAME(nmp); 654 } else if (nmp != NULL && !NFSHASKERB(nmp) && 655 nd->nd_procnum != NFSPROC_NULL && 656 (nd->nd_flag & ND_USEGSSNAME) != 0) { 657 /* 658 * Use the uid that did the mount when the RPC is doing 659 * NFSv4 system operations, as indicated by the 660 * ND_USEGSSNAME flag, for the AUTH_SYS case. 661 * The credentials in nm_sockreq.nr_cred were used for the 662 * mount. 663 */ 664 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 665 ("newnfs_request: NULL nr_cred")); 666 crfree(authcred); 667 authcred = crhold(nmp->nm_sockreq.nr_cred); 668 } 669 670 if (nmp != NULL) { 671 bzero(&nf, sizeof(struct nfs_feedback_arg)); 672 nf.nf_mount = nmp; 673 nf.nf_td = td; 674 nf.nf_lastmsg = NFSD_MONOSEC - 675 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 676 } 677 678 if (nd->nd_procnum == NFSPROC_NULL) 679 auth = authnone_create(); 680 else if (usegssname) { 681 /* 682 * For this case, the authenticator is held in the 683 * nfssockreq structure, so don't release the reference count 684 * held on it. --> Don't AUTH_DESTROY() it in this function. 685 */ 686 if (nrp->nr_auth == NULL) 687 nrp->nr_auth = nfs_getauth(nrp, secflavour, 688 clnt_principal, srv_principal, NULL, authcred); 689 else 690 rpc_gss_refresh_auth_call(nrp->nr_auth); 691 auth = nrp->nr_auth; 692 } else 693 auth = nfs_getauth(nrp, secflavour, NULL, 694 srv_principal, NULL, authcred); 695 crfree(authcred); 696 if (auth == NULL) { 697 m_freem(nd->nd_mreq); 698 if (set_sigset) 699 newnfs_restore_sigmask(td, &oldset); 700 return (EACCES); 701 } 702 bzero(&ext, sizeof(ext)); 703 ext.rc_auth = auth; 704 if (nmp != NULL) { 705 ext.rc_feedback = nfs_feedback; 706 ext.rc_feedback_arg = &nf; 707 } 708 709 procnum = nd->nd_procnum; 710 if ((nd->nd_flag & ND_NFSV4) && 711 nd->nd_procnum != NFSPROC_NULL && 712 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 713 procnum = NFSV4PROC_COMPOUND; 714 715 if (nmp != NULL) { 716 NFSINCRGLOBAL(nfsstatsv1.rpcrequests); 717 718 /* Map the procnum to the old NFSv2 one, as required. */ 719 if ((nd->nd_flag & ND_NFSV2) != 0) { 720 if (nd->nd_procnum < NFS_V3NPROCS) 721 procnum = nfsv2_procid[nd->nd_procnum]; 722 else 723 procnum = NFSV2PROC_NOOP; 724 } 725 726 /* 727 * Now only used for the R_DONTRECOVER case, but until that is 728 * supported within the krpc code, I need to keep a queue of 729 * outstanding RPCs for nfsv4 client requests. 730 */ 731 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 732 rep = malloc(sizeof(struct nfsreq), 733 M_NFSDREQ, M_WAITOK); 734 #ifdef KDTRACE_HOOKS 735 if (dtrace_nfscl_nfs234_start_probe != NULL) { 736 uint32_t probe_id; 737 int probe_procnum; 738 739 if (nd->nd_flag & ND_NFSV4) { 740 probe_id = 741 nfscl_nfs4_start_probes[nd->nd_procnum]; 742 probe_procnum = nd->nd_procnum; 743 } else if (nd->nd_flag & ND_NFSV3) { 744 probe_id = nfscl_nfs3_start_probes[procnum]; 745 probe_procnum = procnum; 746 } else { 747 probe_id = 748 nfscl_nfs2_start_probes[nd->nd_procnum]; 749 probe_procnum = procnum; 750 } 751 if (probe_id != 0) 752 (dtrace_nfscl_nfs234_start_probe) 753 (probe_id, vp, nd->nd_mreq, cred, 754 probe_procnum); 755 } 756 #endif 757 } 758 freeslot = -1; /* Set to slot that needs to be free'd */ 759 tryagain: 760 slot = -1; /* Slot that needs a sequence# increment. */ 761 /* 762 * This timeout specifies when a new socket should be created, 763 * along with new xid values. For UDP, this should be done 764 * infrequently, since retransmits of RPC requests should normally 765 * use the same xid. 766 */ 767 if (nmp == NULL) { 768 timo.tv_usec = 0; 769 if (clp == NULL) 770 timo.tv_sec = NFSV4_UPCALLTIMEO; 771 else 772 timo.tv_sec = NFSV4_CALLBACKTIMEO; 773 } else { 774 if (nrp->nr_sotype != SOCK_DGRAM) { 775 timo.tv_usec = 0; 776 if ((nmp->nm_flag & NFSMNT_NFSV4)) 777 timo.tv_sec = INT_MAX; 778 else 779 timo.tv_sec = NFS_TCPTIMEO; 780 } else { 781 if (NFSHASSOFT(nmp)) { 782 /* 783 * CLSET_RETRIES is set to 2, so this should be 784 * half of the total timeout required. 785 */ 786 timeo = nmp->nm_retry * nmp->nm_timeo / 2; 787 if (timeo < 1) 788 timeo = 1; 789 timo.tv_sec = timeo / NFS_HZ; 790 timo.tv_usec = (timeo % NFS_HZ) * 1000000 / 791 NFS_HZ; 792 } else { 793 /* For UDP hard mounts, use a large value. */ 794 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ; 795 timo.tv_usec = 0; 796 } 797 } 798 799 if (rep != NULL) { 800 rep->r_flags = 0; 801 rep->r_nmp = nmp; 802 /* 803 * Chain request into list of outstanding requests. 804 */ 805 NFSLOCKREQ(); 806 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 807 NFSUNLOCKREQ(); 808 } 809 } 810 811 nd->nd_mrep = NULL; 812 if (clp != NULL && sep != NULL) 813 stat = clnt_bck_call(nrp->nr_client, &ext, procnum, 814 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt); 815 else 816 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, 817 nd->nd_mreq, &nd->nd_mrep, timo); 818 NFSCL_DEBUG(2, "clnt call=%d\n", stat); 819 820 if (rep != NULL) { 821 /* 822 * RPC done, unlink the request. 823 */ 824 NFSLOCKREQ(); 825 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 826 NFSUNLOCKREQ(); 827 } 828 829 /* 830 * If there was a successful reply and a tprintf msg. 831 * tprintf a response. 832 */ 833 if (stat == RPC_SUCCESS) { 834 error = 0; 835 } else if (stat == RPC_TIMEDOUT) { 836 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts); 837 error = ETIMEDOUT; 838 } else if (stat == RPC_VERSMISMATCH) { 839 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 840 error = EOPNOTSUPP; 841 } else if (stat == RPC_PROGVERSMISMATCH) { 842 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 843 error = EPROTONOSUPPORT; 844 } else if (stat == RPC_INTR) { 845 error = EINTR; 846 } else if (stat == RPC_CANTSEND || stat == RPC_CANTRECV || 847 stat == RPC_SYSTEMERROR) { 848 /* Check for a session slot that needs to be free'd. */ 849 if ((nd->nd_flag & (ND_NFSV41 | ND_HASSLOTID)) == 850 (ND_NFSV41 | ND_HASSLOTID) && nmp != NULL && 851 nd->nd_procnum != NFSPROC_NULL) { 852 /* 853 * This should only occur when either the MDS or 854 * a client has an RPC against a DS fail. 855 * This happens because these cases use "soft" 856 * connections that can time out and fail. 857 * The slot used for this RPC is now in a 858 * non-deterministic state, but if the slot isn't 859 * free'd, threads can get stuck waiting for a slot. 860 */ 861 if (sep == NULL) 862 sep = nfsmnt_mdssession(nmp); 863 /* 864 * Bump the sequence# out of range, so that reuse of 865 * this slot will result in an NFSERR_SEQMISORDERED 866 * error and not a bogus cached RPC reply. 867 */ 868 mtx_lock(&sep->nfsess_mtx); 869 sep->nfsess_slotseq[nd->nd_slotid] += 10; 870 mtx_unlock(&sep->nfsess_mtx); 871 /* And free the slot. */ 872 nfsv4_freeslot(sep, nd->nd_slotid); 873 } 874 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 875 error = ENXIO; 876 } else { 877 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 878 error = EACCES; 879 } 880 if (error) { 881 m_freem(nd->nd_mreq); 882 if (usegssname == 0) 883 AUTH_DESTROY(auth); 884 if (rep != NULL) 885 free(rep, M_NFSDREQ); 886 if (set_sigset) 887 newnfs_restore_sigmask(td, &oldset); 888 return (error); 889 } 890 891 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 892 893 /* 894 * Search for any mbufs that are not a multiple of 4 bytes long 895 * or with m_data not longword aligned. 896 * These could cause pointer alignment problems, so copy them to 897 * well aligned mbufs. 898 */ 899 newnfs_realign(&nd->nd_mrep, M_WAITOK); 900 nd->nd_md = nd->nd_mrep; 901 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 902 nd->nd_repstat = 0; 903 if (nd->nd_procnum != NFSPROC_NULL && 904 nd->nd_procnum != NFSV4PROC_CBNULL) { 905 /* If sep == NULL, set it to the default in nmp. */ 906 if (sep == NULL && nmp != NULL) 907 sep = nfsmnt_mdssession(nmp); 908 /* 909 * and now the actual NFS xdr. 910 */ 911 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 912 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 913 if (nd->nd_repstat >= 10000) 914 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum, 915 (int)nd->nd_repstat); 916 917 /* 918 * Get rid of the tag, return count and SEQUENCE result for 919 * NFSv4. 920 */ 921 if ((nd->nd_flag & ND_NFSV4) != 0) { 922 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 923 i = fxdr_unsigned(int, *tl); 924 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 925 if (error) 926 goto nfsmout; 927 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 928 opcnt = fxdr_unsigned(int, *tl++); 929 i = fxdr_unsigned(int, *tl++); 930 j = fxdr_unsigned(int, *tl); 931 if (j >= 10000) 932 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j); 933 /* 934 * If the first op is Sequence, free up the slot. 935 */ 936 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) || 937 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0)) 938 NFSCL_DEBUG(1, "failed seq=%d\n", j); 939 if (((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) || 940 (clp != NULL && i == NFSV4OP_CBSEQUENCE && 941 j == 0)) && sep != NULL) { 942 if (i == NFSV4OP_SEQUENCE) 943 NFSM_DISSECT(tl, uint32_t *, 944 NFSX_V4SESSIONID + 945 5 * NFSX_UNSIGNED); 946 else 947 NFSM_DISSECT(tl, uint32_t *, 948 NFSX_V4SESSIONID + 949 4 * NFSX_UNSIGNED); 950 mtx_lock(&sep->nfsess_mtx); 951 if (bcmp(tl, sep->nfsess_sessionid, 952 NFSX_V4SESSIONID) == 0) { 953 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 954 retseq = fxdr_unsigned(uint32_t, *tl++); 955 slot = fxdr_unsigned(int, *tl++); 956 freeslot = slot; 957 if (retseq != sep->nfsess_slotseq[slot]) 958 printf("retseq diff 0x%x\n", 959 retseq); 960 retval = fxdr_unsigned(uint32_t, *++tl); 961 if ((retval + 1) < sep->nfsess_foreslots 962 ) 963 sep->nfsess_foreslots = (retval 964 + 1); 965 else if ((retval + 1) > 966 sep->nfsess_foreslots) 967 sep->nfsess_foreslots = (retval 968 < 64) ? (retval + 1) : 64; 969 } 970 mtx_unlock(&sep->nfsess_mtx); 971 972 /* Grab the op and status for the next one. */ 973 if (opcnt > 1) { 974 NFSM_DISSECT(tl, uint32_t *, 975 2 * NFSX_UNSIGNED); 976 i = fxdr_unsigned(int, *tl++); 977 j = fxdr_unsigned(int, *tl); 978 } 979 } 980 } 981 if (nd->nd_repstat != 0) { 982 if (nd->nd_repstat == NFSERR_BADSESSION && 983 nmp != NULL && dssep == NULL && 984 (nd->nd_flag & ND_NFSV41) != 0) { 985 /* 986 * If this is a client side MDS RPC, mark 987 * the MDS session defunct and initiate 988 * recovery, as required. 989 * The nfsess_defunct field is protected by 990 * the NFSLOCKMNT()/nm_mtx lock and not the 991 * nfsess_mtx lock to simplify its handling, 992 * for the MDS session. This lock is also 993 * sufficient for nfsess_sessionid, since it 994 * never changes in the structure. 995 */ 996 NFSCL_DEBUG(1, "Got badsession\n"); 997 NFSLOCKCLSTATE(); 998 NFSLOCKMNT(nmp); 999 sep = NFSMNT_MDSSESSION(nmp); 1000 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence, 1001 NFSX_V4SESSIONID) == 0) { 1002 /* Initiate recovery. */ 1003 sep->nfsess_defunct = 1; 1004 NFSCL_DEBUG(1, "Marked defunct\n"); 1005 if (nmp->nm_clp != NULL) { 1006 nmp->nm_clp->nfsc_flags |= 1007 NFSCLFLAGS_RECOVER; 1008 wakeup(nmp->nm_clp); 1009 } 1010 } 1011 NFSUNLOCKCLSTATE(); 1012 /* 1013 * Sleep for up to 1sec waiting for a new 1014 * session. 1015 */ 1016 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO, 1017 "nfsbadsess", hz); 1018 /* 1019 * Get the session again, in case a new one 1020 * has been created during the sleep. 1021 */ 1022 sep = NFSMNT_MDSSESSION(nmp); 1023 NFSUNLOCKMNT(nmp); 1024 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) { 1025 reterr = nfsv4_sequencelookup(nmp, sep, 1026 &slotpos, &maxslot, &slotseq, 1027 sessionid); 1028 if (reterr == 0) { 1029 /* Fill in new session info. */ 1030 NFSCL_DEBUG(1, 1031 "Filling in new sequence\n"); 1032 tl = nd->nd_sequence; 1033 bcopy(sessionid, tl, 1034 NFSX_V4SESSIONID); 1035 tl += NFSX_V4SESSIONID / 1036 NFSX_UNSIGNED; 1037 *tl++ = txdr_unsigned(slotseq); 1038 *tl++ = txdr_unsigned(slotpos); 1039 *tl = txdr_unsigned(maxslot); 1040 } 1041 if (reterr == NFSERR_BADSESSION || 1042 reterr == 0) { 1043 NFSCL_DEBUG(1, 1044 "Badsession looping\n"); 1045 m_freem(nd->nd_mrep); 1046 nd->nd_mrep = NULL; 1047 goto tryagain; 1048 } 1049 nd->nd_repstat = reterr; 1050 NFSCL_DEBUG(1, "Got err=%d\n", reterr); 1051 } 1052 } 1053 /* 1054 * When clp != NULL, it is a callback and all 1055 * callback operations can be retried for NFSERR_DELAY. 1056 */ 1057 if (((nd->nd_repstat == NFSERR_DELAY || 1058 nd->nd_repstat == NFSERR_GRACE) && 1059 (nd->nd_flag & ND_NFSV4) && (clp != NULL || 1060 (nd->nd_procnum != NFSPROC_DELEGRETURN && 1061 nd->nd_procnum != NFSPROC_SETATTR && 1062 nd->nd_procnum != NFSPROC_READ && 1063 nd->nd_procnum != NFSPROC_READDS && 1064 nd->nd_procnum != NFSPROC_WRITE && 1065 nd->nd_procnum != NFSPROC_WRITEDS && 1066 nd->nd_procnum != NFSPROC_OPEN && 1067 nd->nd_procnum != NFSPROC_CREATE && 1068 nd->nd_procnum != NFSPROC_OPENCONFIRM && 1069 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 1070 nd->nd_procnum != NFSPROC_CLOSE && 1071 nd->nd_procnum != NFSPROC_LOCK && 1072 nd->nd_procnum != NFSPROC_LOCKU))) || 1073 (nd->nd_repstat == NFSERR_DELAY && 1074 (nd->nd_flag & ND_NFSV4) == 0) || 1075 nd->nd_repstat == NFSERR_RESOURCE) { 1076 if (trylater_delay > NFS_TRYLATERDEL) 1077 trylater_delay = NFS_TRYLATERDEL; 1078 waituntil = NFSD_MONOSEC + trylater_delay; 1079 while (NFSD_MONOSEC < waituntil) 1080 (void) nfs_catnap(PZERO, 0, "nfstry"); 1081 trylater_delay *= 2; 1082 if (slot != -1) { 1083 mtx_lock(&sep->nfsess_mtx); 1084 sep->nfsess_slotseq[slot]++; 1085 *nd->nd_slotseq = txdr_unsigned( 1086 sep->nfsess_slotseq[slot]); 1087 mtx_unlock(&sep->nfsess_mtx); 1088 } 1089 m_freem(nd->nd_mrep); 1090 nd->nd_mrep = NULL; 1091 goto tryagain; 1092 } 1093 1094 /* 1095 * If the File Handle was stale, invalidate the 1096 * lookup cache, just in case. 1097 * (vp != NULL implies a client side call) 1098 */ 1099 if (nd->nd_repstat == ESTALE && vp != NULL) { 1100 cache_purge(vp); 1101 if (ncl_call_invalcaches != NULL) 1102 (*ncl_call_invalcaches)(vp); 1103 } 1104 } 1105 if ((nd->nd_flag & ND_NFSV4) != 0) { 1106 /* Free the slot, as required. */ 1107 if (freeslot != -1) 1108 nfsv4_freeslot(sep, freeslot); 1109 /* 1110 * If this op is Putfh, throw its results away. 1111 */ 1112 if (j >= 10000) 1113 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j); 1114 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) { 1115 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 1116 i = fxdr_unsigned(int, *tl++); 1117 j = fxdr_unsigned(int, *tl); 1118 if (j >= 10000) 1119 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i, 1120 j); 1121 /* 1122 * All Compounds that do an Op that must 1123 * be in sequence consist of NFSV4OP_PUTFH 1124 * followed by one of these. As such, we 1125 * can determine if the seqid# should be 1126 * incremented, here. 1127 */ 1128 if ((i == NFSV4OP_OPEN || 1129 i == NFSV4OP_OPENCONFIRM || 1130 i == NFSV4OP_OPENDOWNGRADE || 1131 i == NFSV4OP_CLOSE || 1132 i == NFSV4OP_LOCK || 1133 i == NFSV4OP_LOCKU) && 1134 (j == 0 || 1135 (j != NFSERR_STALECLIENTID && 1136 j != NFSERR_STALESTATEID && 1137 j != NFSERR_BADSTATEID && 1138 j != NFSERR_BADSEQID && 1139 j != NFSERR_BADXDR && 1140 j != NFSERR_RESOURCE && 1141 j != NFSERR_NOFILEHANDLE))) 1142 nd->nd_flag |= ND_INCRSEQID; 1143 } 1144 /* 1145 * If this op's status is non-zero, mark 1146 * that there is no more data to process. 1147 * The exception is Setattr, which always has xdr 1148 * when it has failed. 1149 */ 1150 if (j != 0 && i != NFSV4OP_SETATTR) 1151 nd->nd_flag |= ND_NOMOREDATA; 1152 1153 /* 1154 * If R_DONTRECOVER is set, replace the stale error 1155 * reply, so that recovery isn't initiated. 1156 */ 1157 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 1158 nd->nd_repstat == NFSERR_BADSESSION || 1159 nd->nd_repstat == NFSERR_STALESTATEID) && 1160 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 1161 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 1162 } 1163 } 1164 1165 #ifdef KDTRACE_HOOKS 1166 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 1167 uint32_t probe_id; 1168 int probe_procnum; 1169 1170 if (nd->nd_flag & ND_NFSV4) { 1171 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 1172 probe_procnum = nd->nd_procnum; 1173 } else if (nd->nd_flag & ND_NFSV3) { 1174 probe_id = nfscl_nfs3_done_probes[procnum]; 1175 probe_procnum = procnum; 1176 } else { 1177 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 1178 probe_procnum = procnum; 1179 } 1180 if (probe_id != 0) 1181 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 1182 nd->nd_mreq, cred, probe_procnum, 0); 1183 } 1184 #endif 1185 1186 m_freem(nd->nd_mreq); 1187 if (usegssname == 0) 1188 AUTH_DESTROY(auth); 1189 if (rep != NULL) 1190 free(rep, M_NFSDREQ); 1191 if (set_sigset) 1192 newnfs_restore_sigmask(td, &oldset); 1193 return (0); 1194 nfsmout: 1195 mbuf_freem(nd->nd_mrep); 1196 mbuf_freem(nd->nd_mreq); 1197 if (usegssname == 0) 1198 AUTH_DESTROY(auth); 1199 if (rep != NULL) 1200 free(rep, M_NFSDREQ); 1201 if (set_sigset) 1202 newnfs_restore_sigmask(td, &oldset); 1203 return (error); 1204 } 1205 1206 /* 1207 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 1208 * wait for all requests to complete. This is used by forced unmounts 1209 * to terminate any outstanding RPCs. 1210 */ 1211 int 1212 newnfs_nmcancelreqs(struct nfsmount *nmp) 1213 { 1214 struct nfsclds *dsp; 1215 struct __rpc_client *cl; 1216 1217 if (nmp->nm_sockreq.nr_client != NULL) 1218 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 1219 lookformore: 1220 NFSLOCKMNT(nmp); 1221 TAILQ_FOREACH(dsp, &nmp->nm_sess, nfsclds_list) { 1222 NFSLOCKDS(dsp); 1223 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1224 (dsp->nfsclds_flags & NFSCLDS_CLOSED) == 0 && 1225 dsp->nfsclds_sockp != NULL && 1226 dsp->nfsclds_sockp->nr_client != NULL) { 1227 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 1228 cl = dsp->nfsclds_sockp->nr_client; 1229 NFSUNLOCKDS(dsp); 1230 NFSUNLOCKMNT(nmp); 1231 CLNT_CLOSE(cl); 1232 goto lookformore; 1233 } 1234 NFSUNLOCKDS(dsp); 1235 } 1236 NFSUNLOCKMNT(nmp); 1237 return (0); 1238 } 1239 1240 /* 1241 * Any signal that can interrupt an NFS operation in an intr mount 1242 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 1243 */ 1244 int newnfs_sig_set[] = { 1245 SIGINT, 1246 SIGTERM, 1247 SIGHUP, 1248 SIGKILL, 1249 SIGQUIT 1250 }; 1251 1252 /* 1253 * Check to see if one of the signals in our subset is pending on 1254 * the process (in an intr mount). 1255 */ 1256 static int 1257 nfs_sig_pending(sigset_t set) 1258 { 1259 int i; 1260 1261 for (i = 0 ; i < nitems(newnfs_sig_set); i++) 1262 if (SIGISMEMBER(set, newnfs_sig_set[i])) 1263 return (1); 1264 return (0); 1265 } 1266 1267 /* 1268 * The set/restore sigmask functions are used to (temporarily) overwrite 1269 * the thread td_sigmask during an RPC call (for example). These are also 1270 * used in other places in the NFS client that might tsleep(). 1271 */ 1272 void 1273 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 1274 { 1275 sigset_t newset; 1276 int i; 1277 struct proc *p; 1278 1279 SIGFILLSET(newset); 1280 if (td == NULL) 1281 td = curthread; /* XXX */ 1282 p = td->td_proc; 1283 /* Remove the NFS set of signals from newset */ 1284 PROC_LOCK(p); 1285 mtx_lock(&p->p_sigacts->ps_mtx); 1286 for (i = 0 ; i < nitems(newnfs_sig_set); i++) { 1287 /* 1288 * But make sure we leave the ones already masked 1289 * by the process, ie. remove the signal from the 1290 * temporary signalmask only if it wasn't already 1291 * in p_sigmask. 1292 */ 1293 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 1294 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 1295 SIGDELSET(newset, newnfs_sig_set[i]); 1296 } 1297 mtx_unlock(&p->p_sigacts->ps_mtx); 1298 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 1299 SIGPROCMASK_PROC_LOCKED); 1300 PROC_UNLOCK(p); 1301 } 1302 1303 void 1304 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 1305 { 1306 if (td == NULL) 1307 td = curthread; /* XXX */ 1308 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 1309 } 1310 1311 /* 1312 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 1313 * old one after msleep() returns. 1314 */ 1315 int 1316 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 1317 { 1318 sigset_t oldset; 1319 int error; 1320 1321 if ((priority & PCATCH) == 0) 1322 return msleep(ident, mtx, priority, wmesg, timo); 1323 if (td == NULL) 1324 td = curthread; /* XXX */ 1325 newnfs_set_sigmask(td, &oldset); 1326 error = msleep(ident, mtx, priority, wmesg, timo); 1327 newnfs_restore_sigmask(td, &oldset); 1328 return (error); 1329 } 1330 1331 /* 1332 * Test for a termination condition pending on the process. 1333 * This is used for NFSMNT_INT mounts. 1334 */ 1335 int 1336 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 1337 { 1338 struct proc *p; 1339 sigset_t tmpset; 1340 1341 /* Terminate all requests while attempting a forced unmount. */ 1342 if (NFSCL_FORCEDISM(nmp->nm_mountp)) 1343 return (EIO); 1344 if (!(nmp->nm_flag & NFSMNT_INT)) 1345 return (0); 1346 if (td == NULL) 1347 return (0); 1348 p = td->td_proc; 1349 PROC_LOCK(p); 1350 tmpset = p->p_siglist; 1351 SIGSETOR(tmpset, td->td_siglist); 1352 SIGSETNAND(tmpset, td->td_sigmask); 1353 mtx_lock(&p->p_sigacts->ps_mtx); 1354 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 1355 mtx_unlock(&p->p_sigacts->ps_mtx); 1356 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 1357 && nfs_sig_pending(tmpset)) { 1358 PROC_UNLOCK(p); 1359 return (EINTR); 1360 } 1361 PROC_UNLOCK(p); 1362 return (0); 1363 } 1364 1365 static int 1366 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1367 { 1368 struct proc *p; 1369 1370 p = td ? td->td_proc : NULL; 1371 if (error) { 1372 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n", 1373 server, msg, error); 1374 } else { 1375 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg); 1376 } 1377 return (0); 1378 } 1379 1380 static void 1381 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1382 int error, int flags) 1383 { 1384 if (nmp == NULL) 1385 return; 1386 mtx_lock(&nmp->nm_mtx); 1387 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1388 nmp->nm_state |= NFSSTA_TIMEO; 1389 mtx_unlock(&nmp->nm_mtx); 1390 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1391 VQ_NOTRESP, 0); 1392 } else 1393 mtx_unlock(&nmp->nm_mtx); 1394 mtx_lock(&nmp->nm_mtx); 1395 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1396 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1397 mtx_unlock(&nmp->nm_mtx); 1398 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1399 VQ_NOTRESPLOCK, 0); 1400 } else 1401 mtx_unlock(&nmp->nm_mtx); 1402 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1403 } 1404 1405 static void 1406 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1407 int flags, int tprintfmsg) 1408 { 1409 if (nmp == NULL) 1410 return; 1411 if (tprintfmsg) { 1412 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1413 } 1414 1415 mtx_lock(&nmp->nm_mtx); 1416 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1417 nmp->nm_state &= ~NFSSTA_TIMEO; 1418 mtx_unlock(&nmp->nm_mtx); 1419 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1420 VQ_NOTRESP, 1); 1421 } else 1422 mtx_unlock(&nmp->nm_mtx); 1423 1424 mtx_lock(&nmp->nm_mtx); 1425 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1426 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1427 mtx_unlock(&nmp->nm_mtx); 1428 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1429 VQ_NOTRESPLOCK, 1); 1430 } else 1431 mtx_unlock(&nmp->nm_mtx); 1432 } 1433 1434