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 (NFSHASTLS(nmp)) { 285 CLNT_CONTROL(client, CLSET_TLS, &one); 286 if (nmp->nm_tlscertname != NULL) 287 CLNT_CONTROL(client, CLSET_TLSCERTNAME, 288 nmp->nm_tlscertname); 289 } 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 if (dotls) 384 CLNT_CONTROL(client, CLSET_TLS, &one); 385 } 386 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 387 388 if (nmp != NULL) { 389 /* 390 * For UDP, there are 2 timeouts: 391 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer 392 * that does a retransmit of an RPC request using the same 393 * socket and xid. This is what you normally want to do, 394 * since NFS servers depend on "same xid" for their 395 * Duplicate Request Cache. 396 * - timeout specified in CLNT_CALL_MBUF(), which specifies when 397 * retransmits on the same socket should fail and a fresh 398 * socket created. Each of these timeouts counts as one 399 * CLSET_RETRIES as set above. 400 * Set the initial retransmit timeout for UDP. This timeout 401 * doesn't exist for TCP and the following call just fails, 402 * which is ok. 403 */ 404 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 405 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ; 406 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo); 407 } 408 409 mtx_lock(&nrp->nr_mtx); 410 if (nrp->nr_client != NULL) { 411 mtx_unlock(&nrp->nr_mtx); 412 /* 413 * Someone else already connected. 414 */ 415 CLNT_RELEASE(client); 416 } else { 417 nrp->nr_client = client; 418 /* 419 * Protocols that do not require connections may be optionally 420 * left unconnected for servers that reply from a port other 421 * than NFS_PORT. 422 */ 423 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 424 mtx_unlock(&nrp->nr_mtx); 425 CLNT_CONTROL(client, CLSET_CONNECT, &one); 426 } else 427 mtx_unlock(&nrp->nr_mtx); 428 } 429 430 out: 431 /* Restore current thread's credentials. */ 432 td->td_ucred = origcred; 433 434 NFSEXITCODE(error); 435 return (error); 436 } 437 438 /* 439 * NFS disconnect. Clean up and unlink. 440 */ 441 void 442 newnfs_disconnect(struct nfssockreq *nrp) 443 { 444 CLIENT *client; 445 446 mtx_lock(&nrp->nr_mtx); 447 if (nrp->nr_client != NULL) { 448 client = nrp->nr_client; 449 nrp->nr_client = NULL; 450 mtx_unlock(&nrp->nr_mtx); 451 rpc_gss_secpurge_call(client); 452 CLNT_CLOSE(client); 453 CLNT_RELEASE(client); 454 } else { 455 mtx_unlock(&nrp->nr_mtx); 456 } 457 } 458 459 static AUTH * 460 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 461 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 462 { 463 rpc_gss_service_t svc; 464 AUTH *auth; 465 466 switch (secflavour) { 467 case RPCSEC_GSS_KRB5: 468 case RPCSEC_GSS_KRB5I: 469 case RPCSEC_GSS_KRB5P: 470 if (!mech_oid) { 471 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 472 return (NULL); 473 } 474 if (secflavour == RPCSEC_GSS_KRB5) 475 svc = rpc_gss_svc_none; 476 else if (secflavour == RPCSEC_GSS_KRB5I) 477 svc = rpc_gss_svc_integrity; 478 else 479 svc = rpc_gss_svc_privacy; 480 481 if (clnt_principal == NULL) 482 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 483 srv_principal, mech_oid, svc); 484 else { 485 auth = rpc_gss_seccreate_call(nrp->nr_client, cred, 486 clnt_principal, srv_principal, "kerberosv5", 487 svc, NULL, NULL, NULL); 488 return (auth); 489 } 490 if (auth != NULL) 491 return (auth); 492 /* fallthrough */ 493 case AUTH_SYS: 494 default: 495 return (authunix_create(cred)); 496 } 497 } 498 499 /* 500 * Callback from the RPC code to generate up/down notifications. 501 */ 502 503 struct nfs_feedback_arg { 504 struct nfsmount *nf_mount; 505 int nf_lastmsg; /* last tprintf */ 506 int nf_tprintfmsg; 507 struct thread *nf_td; 508 }; 509 510 static void 511 nfs_feedback(int type, int proc, void *arg) 512 { 513 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 514 struct nfsmount *nmp = nf->nf_mount; 515 time_t now; 516 517 switch (type) { 518 case FEEDBACK_REXMIT2: 519 case FEEDBACK_RECONNECT: 520 now = NFSD_MONOSEC; 521 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) { 522 nfs_down(nmp, nf->nf_td, 523 "not responding", 0, NFSSTA_TIMEO); 524 nf->nf_tprintfmsg = TRUE; 525 nf->nf_lastmsg = now; 526 } 527 break; 528 529 case FEEDBACK_OK: 530 nfs_up(nf->nf_mount, nf->nf_td, 531 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 532 break; 533 } 534 } 535 536 /* 537 * newnfs_request - goes something like this 538 * - does the rpc by calling the krpc layer 539 * - break down rpc header and return with nfs reply 540 * nb: always frees up nd_mreq mbuf list 541 */ 542 int 543 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 544 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 545 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 546 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep) 547 { 548 uint32_t retseq, retval, slotseq, *tl; 549 time_t waituntil; 550 int i = 0, j = 0, opcnt, set_sigset = 0, slot; 551 int error = 0, usegssname = 0, secflavour = AUTH_SYS; 552 int freeslot, maxslot, reterr, slotpos, timeo; 553 u_int16_t procnum; 554 u_int trylater_delay = 1; 555 struct nfs_feedback_arg nf; 556 struct timeval timo; 557 AUTH *auth; 558 struct rpc_callextra ext; 559 enum clnt_stat stat; 560 struct nfsreq *rep = NULL; 561 char *srv_principal = NULL, *clnt_principal = NULL; 562 sigset_t oldset; 563 struct ucred *authcred; 564 struct nfsclsession *sep; 565 uint8_t sessionid[NFSX_V4SESSIONID]; 566 567 sep = dssep; 568 if (xidp != NULL) 569 *xidp = 0; 570 /* Reject requests while attempting a forced unmount. */ 571 if (nmp != NULL && NFSCL_FORCEDISM(nmp->nm_mountp)) { 572 m_freem(nd->nd_mreq); 573 return (ESTALE); 574 } 575 576 /* 577 * Set authcred, which is used to acquire RPC credentials to 578 * the cred argument, by default. The crhold() should not be 579 * necessary, but will ensure that some future code change 580 * doesn't result in the credential being free'd prematurely. 581 */ 582 authcred = crhold(cred); 583 584 /* For client side interruptible mounts, mask off the signals. */ 585 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 586 newnfs_set_sigmask(td, &oldset); 587 set_sigset = 1; 588 } 589 590 /* 591 * XXX if not already connected call nfs_connect now. Longer 592 * term, change nfs_mount to call nfs_connect unconditionally 593 * and let clnt_reconnect_create handle reconnects. 594 */ 595 if (nrp->nr_client == NULL) 596 newnfs_connect(nmp, nrp, cred, td, 0, false); 597 598 /* 599 * For a client side mount, nmp is != NULL and clp == NULL. For 600 * server calls (callbacks or upcalls), nmp == NULL. 601 */ 602 if (clp != NULL) { 603 NFSLOCKSTATE(); 604 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 605 secflavour = RPCSEC_GSS_KRB5; 606 if (nd->nd_procnum != NFSPROC_NULL) { 607 if (clp->lc_flags & LCL_GSSINTEGRITY) 608 secflavour = RPCSEC_GSS_KRB5I; 609 else if (clp->lc_flags & LCL_GSSPRIVACY) 610 secflavour = RPCSEC_GSS_KRB5P; 611 } 612 } 613 NFSUNLOCKSTATE(); 614 } else if (nmp != NULL && NFSHASKERB(nmp) && 615 nd->nd_procnum != NFSPROC_NULL) { 616 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 617 nd->nd_flag |= ND_USEGSSNAME; 618 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 619 /* 620 * If there is a client side host based credential, 621 * use that, otherwise use the system uid, if set. 622 * The system uid is in the nmp->nm_sockreq.nr_cred 623 * credentials. 624 */ 625 if (nmp->nm_krbnamelen > 0) { 626 usegssname = 1; 627 clnt_principal = nmp->nm_krbname; 628 } else if (nmp->nm_uid != (uid_t)-1) { 629 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 630 ("newnfs_request: NULL nr_cred")); 631 crfree(authcred); 632 authcred = crhold(nmp->nm_sockreq.nr_cred); 633 } 634 } else if (nmp->nm_krbnamelen == 0 && 635 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 636 /* 637 * If there is no host based principal name and 638 * the system uid is set and this is root, use the 639 * system uid, since root won't have user 640 * credentials in a credentials cache file. 641 * The system uid is in the nmp->nm_sockreq.nr_cred 642 * credentials. 643 */ 644 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 645 ("newnfs_request: NULL nr_cred")); 646 crfree(authcred); 647 authcred = crhold(nmp->nm_sockreq.nr_cred); 648 } 649 if (NFSHASINTEGRITY(nmp)) 650 secflavour = RPCSEC_GSS_KRB5I; 651 else if (NFSHASPRIVACY(nmp)) 652 secflavour = RPCSEC_GSS_KRB5P; 653 else 654 secflavour = RPCSEC_GSS_KRB5; 655 srv_principal = NFSMNT_SRVKRBNAME(nmp); 656 } else if (nmp != NULL && !NFSHASKERB(nmp) && 657 nd->nd_procnum != NFSPROC_NULL && 658 (nd->nd_flag & ND_USEGSSNAME) != 0) { 659 /* 660 * Use the uid that did the mount when the RPC is doing 661 * NFSv4 system operations, as indicated by the 662 * ND_USEGSSNAME flag, for the AUTH_SYS case. 663 * The credentials in nm_sockreq.nr_cred were used for the 664 * mount. 665 */ 666 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 667 ("newnfs_request: NULL nr_cred")); 668 crfree(authcred); 669 authcred = crhold(nmp->nm_sockreq.nr_cred); 670 } 671 672 if (nmp != NULL) { 673 bzero(&nf, sizeof(struct nfs_feedback_arg)); 674 nf.nf_mount = nmp; 675 nf.nf_td = td; 676 nf.nf_lastmsg = NFSD_MONOSEC - 677 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 678 } 679 680 if (nd->nd_procnum == NFSPROC_NULL) 681 auth = authnone_create(); 682 else if (usegssname) { 683 /* 684 * For this case, the authenticator is held in the 685 * nfssockreq structure, so don't release the reference count 686 * held on it. --> Don't AUTH_DESTROY() it in this function. 687 */ 688 if (nrp->nr_auth == NULL) 689 nrp->nr_auth = nfs_getauth(nrp, secflavour, 690 clnt_principal, srv_principal, NULL, authcred); 691 else 692 rpc_gss_refresh_auth_call(nrp->nr_auth); 693 auth = nrp->nr_auth; 694 } else 695 auth = nfs_getauth(nrp, secflavour, NULL, 696 srv_principal, NULL, authcred); 697 crfree(authcred); 698 if (auth == NULL) { 699 m_freem(nd->nd_mreq); 700 if (set_sigset) 701 newnfs_restore_sigmask(td, &oldset); 702 return (EACCES); 703 } 704 bzero(&ext, sizeof(ext)); 705 ext.rc_auth = auth; 706 if (nmp != NULL) { 707 ext.rc_feedback = nfs_feedback; 708 ext.rc_feedback_arg = &nf; 709 } 710 711 procnum = nd->nd_procnum; 712 if ((nd->nd_flag & ND_NFSV4) && 713 nd->nd_procnum != NFSPROC_NULL && 714 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 715 procnum = NFSV4PROC_COMPOUND; 716 717 if (nmp != NULL) { 718 NFSINCRGLOBAL(nfsstatsv1.rpcrequests); 719 720 /* Map the procnum to the old NFSv2 one, as required. */ 721 if ((nd->nd_flag & ND_NFSV2) != 0) { 722 if (nd->nd_procnum < NFS_V3NPROCS) 723 procnum = nfsv2_procid[nd->nd_procnum]; 724 else 725 procnum = NFSV2PROC_NOOP; 726 } 727 728 /* 729 * Now only used for the R_DONTRECOVER case, but until that is 730 * supported within the krpc code, I need to keep a queue of 731 * outstanding RPCs for nfsv4 client requests. 732 */ 733 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 734 rep = malloc(sizeof(struct nfsreq), 735 M_NFSDREQ, M_WAITOK); 736 #ifdef KDTRACE_HOOKS 737 if (dtrace_nfscl_nfs234_start_probe != NULL) { 738 uint32_t probe_id; 739 int probe_procnum; 740 741 if (nd->nd_flag & ND_NFSV4) { 742 probe_id = 743 nfscl_nfs4_start_probes[nd->nd_procnum]; 744 probe_procnum = nd->nd_procnum; 745 } else if (nd->nd_flag & ND_NFSV3) { 746 probe_id = nfscl_nfs3_start_probes[procnum]; 747 probe_procnum = procnum; 748 } else { 749 probe_id = 750 nfscl_nfs2_start_probes[nd->nd_procnum]; 751 probe_procnum = procnum; 752 } 753 if (probe_id != 0) 754 (dtrace_nfscl_nfs234_start_probe) 755 (probe_id, vp, nd->nd_mreq, cred, 756 probe_procnum); 757 } 758 #endif 759 } 760 freeslot = -1; /* Set to slot that needs to be free'd */ 761 tryagain: 762 slot = -1; /* Slot that needs a sequence# increment. */ 763 /* 764 * This timeout specifies when a new socket should be created, 765 * along with new xid values. For UDP, this should be done 766 * infrequently, since retransmits of RPC requests should normally 767 * use the same xid. 768 */ 769 if (nmp == NULL) { 770 if (clp == NULL) { 771 timo.tv_sec = NFSV4_UPCALLTIMEO; 772 timo.tv_usec = 0; 773 } else { 774 timo.tv_sec = NFSV4_CALLBACKTIMEO / 1000; 775 timo.tv_usec = NFSV4_CALLBACKTIMEO * 1000; 776 } 777 } else { 778 if (nrp->nr_sotype != SOCK_DGRAM) { 779 timo.tv_usec = 0; 780 if ((nmp->nm_flag & NFSMNT_NFSV4)) 781 timo.tv_sec = INT_MAX; 782 else 783 timo.tv_sec = NFS_TCPTIMEO; 784 } else { 785 if (NFSHASSOFT(nmp)) { 786 /* 787 * CLSET_RETRIES is set to 2, so this should be 788 * half of the total timeout required. 789 */ 790 timeo = nmp->nm_retry * nmp->nm_timeo / 2; 791 if (timeo < 1) 792 timeo = 1; 793 timo.tv_sec = timeo / NFS_HZ; 794 timo.tv_usec = (timeo % NFS_HZ) * 1000000 / 795 NFS_HZ; 796 } else { 797 /* For UDP hard mounts, use a large value. */ 798 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ; 799 timo.tv_usec = 0; 800 } 801 } 802 803 if (rep != NULL) { 804 rep->r_flags = 0; 805 rep->r_nmp = nmp; 806 /* 807 * Chain request into list of outstanding requests. 808 */ 809 NFSLOCKREQ(); 810 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 811 NFSUNLOCKREQ(); 812 } 813 } 814 815 nd->nd_mrep = NULL; 816 if (clp != NULL && sep != NULL) 817 stat = clnt_bck_call(nrp->nr_client, &ext, procnum, 818 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt); 819 else 820 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, 821 nd->nd_mreq, &nd->nd_mrep, timo); 822 NFSCL_DEBUG(2, "clnt call=%d\n", stat); 823 824 if (rep != NULL) { 825 /* 826 * RPC done, unlink the request. 827 */ 828 NFSLOCKREQ(); 829 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 830 NFSUNLOCKREQ(); 831 } 832 833 /* 834 * If there was a successful reply and a tprintf msg. 835 * tprintf a response. 836 */ 837 if (stat == RPC_SUCCESS) { 838 error = 0; 839 } else if (stat == RPC_TIMEDOUT) { 840 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts); 841 error = ETIMEDOUT; 842 } else if (stat == RPC_VERSMISMATCH) { 843 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 844 error = EOPNOTSUPP; 845 } else if (stat == RPC_PROGVERSMISMATCH) { 846 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 847 error = EPROTONOSUPPORT; 848 } else if (stat == RPC_INTR) { 849 error = EINTR; 850 } else if (stat == RPC_CANTSEND || stat == RPC_CANTRECV || 851 stat == RPC_SYSTEMERROR) { 852 /* Check for a session slot that needs to be free'd. */ 853 if ((nd->nd_flag & (ND_NFSV41 | ND_HASSLOTID)) == 854 (ND_NFSV41 | ND_HASSLOTID) && nmp != NULL && 855 nd->nd_procnum != NFSPROC_NULL) { 856 /* 857 * This should only occur when either the MDS or 858 * a client has an RPC against a DS fail. 859 * This happens because these cases use "soft" 860 * connections that can time out and fail. 861 * The slot used for this RPC is now in a 862 * non-deterministic state, but if the slot isn't 863 * free'd, threads can get stuck waiting for a slot. 864 */ 865 if (sep == NULL) 866 sep = nfsmnt_mdssession(nmp); 867 /* 868 * Bump the sequence# out of range, so that reuse of 869 * this slot will result in an NFSERR_SEQMISORDERED 870 * error and not a bogus cached RPC reply. 871 */ 872 mtx_lock(&sep->nfsess_mtx); 873 sep->nfsess_slotseq[nd->nd_slotid] += 10; 874 mtx_unlock(&sep->nfsess_mtx); 875 /* And free the slot. */ 876 nfsv4_freeslot(sep, nd->nd_slotid, false); 877 } 878 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 879 error = ENXIO; 880 } else { 881 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid); 882 error = EACCES; 883 } 884 if (error) { 885 m_freem(nd->nd_mreq); 886 if (usegssname == 0) 887 AUTH_DESTROY(auth); 888 if (rep != NULL) 889 free(rep, M_NFSDREQ); 890 if (set_sigset) 891 newnfs_restore_sigmask(td, &oldset); 892 return (error); 893 } 894 895 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 896 897 /* 898 * Search for any mbufs that are not a multiple of 4 bytes long 899 * or with m_data not longword aligned. 900 * These could cause pointer alignment problems, so copy them to 901 * well aligned mbufs. 902 */ 903 newnfs_realign(&nd->nd_mrep, M_WAITOK); 904 nd->nd_md = nd->nd_mrep; 905 nd->nd_dpos = mtod(nd->nd_md, caddr_t); 906 nd->nd_repstat = 0; 907 if (nd->nd_procnum != NFSPROC_NULL && 908 nd->nd_procnum != NFSV4PROC_CBNULL) { 909 /* If sep == NULL, set it to the default in nmp. */ 910 if (sep == NULL && nmp != NULL) 911 sep = nfsmnt_mdssession(nmp); 912 /* 913 * and now the actual NFS xdr. 914 */ 915 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 916 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 917 if (nd->nd_repstat >= 10000) 918 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum, 919 (int)nd->nd_repstat); 920 921 /* 922 * Get rid of the tag, return count and SEQUENCE result for 923 * NFSv4. 924 */ 925 if ((nd->nd_flag & ND_NFSV4) != 0 && nd->nd_repstat != 926 NFSERR_MINORVERMISMATCH) { 927 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 928 i = fxdr_unsigned(int, *tl); 929 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 930 if (error) 931 goto nfsmout; 932 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 933 opcnt = fxdr_unsigned(int, *tl++); 934 i = fxdr_unsigned(int, *tl++); 935 j = fxdr_unsigned(int, *tl); 936 if (j >= 10000) 937 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j); 938 /* 939 * If the first op is Sequence, free up the slot. 940 */ 941 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) || 942 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0)) 943 NFSCL_DEBUG(1, "failed seq=%d\n", j); 944 if (((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) || 945 (clp != NULL && i == NFSV4OP_CBSEQUENCE && 946 j == 0)) && sep != NULL) { 947 if (i == NFSV4OP_SEQUENCE) 948 NFSM_DISSECT(tl, uint32_t *, 949 NFSX_V4SESSIONID + 950 5 * NFSX_UNSIGNED); 951 else 952 NFSM_DISSECT(tl, uint32_t *, 953 NFSX_V4SESSIONID + 954 4 * NFSX_UNSIGNED); 955 mtx_lock(&sep->nfsess_mtx); 956 if (bcmp(tl, sep->nfsess_sessionid, 957 NFSX_V4SESSIONID) == 0) { 958 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 959 retseq = fxdr_unsigned(uint32_t, *tl++); 960 slot = fxdr_unsigned(int, *tl++); 961 freeslot = slot; 962 if (retseq != sep->nfsess_slotseq[slot]) 963 printf("retseq diff 0x%x\n", 964 retseq); 965 retval = fxdr_unsigned(uint32_t, *++tl); 966 if ((retval + 1) < sep->nfsess_foreslots 967 ) 968 sep->nfsess_foreslots = (retval 969 + 1); 970 else if ((retval + 1) > 971 sep->nfsess_foreslots) 972 sep->nfsess_foreslots = (retval 973 < 64) ? (retval + 1) : 64; 974 } 975 mtx_unlock(&sep->nfsess_mtx); 976 977 /* Grab the op and status for the next one. */ 978 if (opcnt > 1) { 979 NFSM_DISSECT(tl, uint32_t *, 980 2 * NFSX_UNSIGNED); 981 i = fxdr_unsigned(int, *tl++); 982 j = fxdr_unsigned(int, *tl); 983 } 984 } 985 } 986 if (nd->nd_repstat != 0) { 987 if (nd->nd_repstat == NFSERR_BADSESSION && 988 nmp != NULL && dssep == NULL && 989 (nd->nd_flag & ND_NFSV41) != 0) { 990 /* 991 * If this is a client side MDS RPC, mark 992 * the MDS session defunct and initiate 993 * recovery, as required. 994 * The nfsess_defunct field is protected by 995 * the NFSLOCKMNT()/nm_mtx lock and not the 996 * nfsess_mtx lock to simplify its handling, 997 * for the MDS session. This lock is also 998 * sufficient for nfsess_sessionid, since it 999 * never changes in the structure. 1000 */ 1001 NFSCL_DEBUG(1, "Got badsession\n"); 1002 NFSLOCKCLSTATE(); 1003 NFSLOCKMNT(nmp); 1004 sep = NFSMNT_MDSSESSION(nmp); 1005 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence, 1006 NFSX_V4SESSIONID) == 0) { 1007 /* Initiate recovery. */ 1008 sep->nfsess_defunct = 1; 1009 NFSCL_DEBUG(1, "Marked defunct\n"); 1010 if (nmp->nm_clp != NULL) { 1011 nmp->nm_clp->nfsc_flags |= 1012 NFSCLFLAGS_RECOVER; 1013 wakeup(nmp->nm_clp); 1014 } 1015 } 1016 NFSUNLOCKCLSTATE(); 1017 /* 1018 * Sleep for up to 1sec waiting for a new 1019 * session. 1020 */ 1021 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO, 1022 "nfsbadsess", hz); 1023 /* 1024 * Get the session again, in case a new one 1025 * has been created during the sleep. 1026 */ 1027 sep = NFSMNT_MDSSESSION(nmp); 1028 NFSUNLOCKMNT(nmp); 1029 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) { 1030 reterr = nfsv4_sequencelookup(nmp, sep, 1031 &slotpos, &maxslot, &slotseq, 1032 sessionid); 1033 if (reterr == 0) { 1034 /* Fill in new session info. */ 1035 NFSCL_DEBUG(1, 1036 "Filling in new sequence\n"); 1037 tl = nd->nd_sequence; 1038 bcopy(sessionid, tl, 1039 NFSX_V4SESSIONID); 1040 tl += NFSX_V4SESSIONID / 1041 NFSX_UNSIGNED; 1042 *tl++ = txdr_unsigned(slotseq); 1043 *tl++ = txdr_unsigned(slotpos); 1044 *tl = txdr_unsigned(maxslot); 1045 } 1046 if (reterr == NFSERR_BADSESSION || 1047 reterr == 0) { 1048 NFSCL_DEBUG(1, 1049 "Badsession looping\n"); 1050 m_freem(nd->nd_mrep); 1051 nd->nd_mrep = NULL; 1052 goto tryagain; 1053 } 1054 nd->nd_repstat = reterr; 1055 NFSCL_DEBUG(1, "Got err=%d\n", reterr); 1056 } 1057 } 1058 /* 1059 * When clp != NULL, it is a callback and all 1060 * callback operations can be retried for NFSERR_DELAY. 1061 */ 1062 if (((nd->nd_repstat == NFSERR_DELAY || 1063 nd->nd_repstat == NFSERR_GRACE) && 1064 (nd->nd_flag & ND_NFSV4) && (clp != NULL || 1065 (nd->nd_procnum != NFSPROC_DELEGRETURN && 1066 nd->nd_procnum != NFSPROC_SETATTR && 1067 nd->nd_procnum != NFSPROC_READ && 1068 nd->nd_procnum != NFSPROC_READDS && 1069 nd->nd_procnum != NFSPROC_WRITE && 1070 nd->nd_procnum != NFSPROC_WRITEDS && 1071 nd->nd_procnum != NFSPROC_OPEN && 1072 nd->nd_procnum != NFSPROC_OPENLAYGET && 1073 nd->nd_procnum != NFSPROC_CREATE && 1074 nd->nd_procnum != NFSPROC_CREATELAYGET && 1075 nd->nd_procnum != NFSPROC_OPENCONFIRM && 1076 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 1077 nd->nd_procnum != NFSPROC_CLOSE && 1078 nd->nd_procnum != NFSPROC_LOCK && 1079 nd->nd_procnum != NFSPROC_LOCKU))) || 1080 (nd->nd_repstat == NFSERR_DELAY && 1081 (nd->nd_flag & ND_NFSV4) == 0) || 1082 nd->nd_repstat == NFSERR_RESOURCE) { 1083 if (trylater_delay > NFS_TRYLATERDEL) 1084 trylater_delay = NFS_TRYLATERDEL; 1085 waituntil = NFSD_MONOSEC + trylater_delay; 1086 while (NFSD_MONOSEC < waituntil) 1087 (void) nfs_catnap(PZERO, 0, "nfstry"); 1088 trylater_delay *= 2; 1089 if (slot != -1) { 1090 mtx_lock(&sep->nfsess_mtx); 1091 sep->nfsess_slotseq[slot]++; 1092 *nd->nd_slotseq = txdr_unsigned( 1093 sep->nfsess_slotseq[slot]); 1094 mtx_unlock(&sep->nfsess_mtx); 1095 } 1096 m_freem(nd->nd_mrep); 1097 nd->nd_mrep = NULL; 1098 goto tryagain; 1099 } 1100 1101 /* 1102 * If the File Handle was stale, invalidate the 1103 * lookup cache, just in case. 1104 * (vp != NULL implies a client side call) 1105 */ 1106 if (nd->nd_repstat == ESTALE && vp != NULL) { 1107 cache_purge(vp); 1108 if (ncl_call_invalcaches != NULL) 1109 (*ncl_call_invalcaches)(vp); 1110 } 1111 } 1112 if ((nd->nd_flag & ND_NFSV4) != 0) { 1113 /* Free the slot, as required. */ 1114 if (freeslot != -1) 1115 nfsv4_freeslot(sep, freeslot, false); 1116 /* 1117 * If this op is Putfh, throw its results away. 1118 */ 1119 if (j >= 10000) 1120 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j); 1121 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) { 1122 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 1123 i = fxdr_unsigned(int, *tl++); 1124 j = fxdr_unsigned(int, *tl); 1125 if (j >= 10000) 1126 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i, 1127 j); 1128 /* 1129 * All Compounds that do an Op that must 1130 * be in sequence consist of NFSV4OP_PUTFH 1131 * followed by one of these. As such, we 1132 * can determine if the seqid# should be 1133 * incremented, here. 1134 */ 1135 if ((i == NFSV4OP_OPEN || 1136 i == NFSV4OP_OPENCONFIRM || 1137 i == NFSV4OP_OPENDOWNGRADE || 1138 i == NFSV4OP_CLOSE || 1139 i == NFSV4OP_LOCK || 1140 i == NFSV4OP_LOCKU) && 1141 (j == 0 || 1142 (j != NFSERR_STALECLIENTID && 1143 j != NFSERR_STALESTATEID && 1144 j != NFSERR_BADSTATEID && 1145 j != NFSERR_BADSEQID && 1146 j != NFSERR_BADXDR && 1147 j != NFSERR_RESOURCE && 1148 j != NFSERR_NOFILEHANDLE))) 1149 nd->nd_flag |= ND_INCRSEQID; 1150 } 1151 /* 1152 * If this op's status is non-zero, mark 1153 * that there is no more data to process. 1154 * The exception is Setattr, which always has xdr 1155 * when it has failed. 1156 */ 1157 if (j != 0 && i != NFSV4OP_SETATTR) 1158 nd->nd_flag |= ND_NOMOREDATA; 1159 1160 /* 1161 * If R_DONTRECOVER is set, replace the stale error 1162 * reply, so that recovery isn't initiated. 1163 */ 1164 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 1165 nd->nd_repstat == NFSERR_BADSESSION || 1166 nd->nd_repstat == NFSERR_STALESTATEID) && 1167 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 1168 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 1169 } 1170 } 1171 1172 #ifdef KDTRACE_HOOKS 1173 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 1174 uint32_t probe_id; 1175 int probe_procnum; 1176 1177 if (nd->nd_flag & ND_NFSV4) { 1178 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 1179 probe_procnum = nd->nd_procnum; 1180 } else if (nd->nd_flag & ND_NFSV3) { 1181 probe_id = nfscl_nfs3_done_probes[procnum]; 1182 probe_procnum = procnum; 1183 } else { 1184 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 1185 probe_procnum = procnum; 1186 } 1187 if (probe_id != 0) 1188 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 1189 nd->nd_mreq, cred, probe_procnum, 0); 1190 } 1191 #endif 1192 1193 m_freem(nd->nd_mreq); 1194 if (usegssname == 0) 1195 AUTH_DESTROY(auth); 1196 if (rep != NULL) 1197 free(rep, M_NFSDREQ); 1198 if (set_sigset) 1199 newnfs_restore_sigmask(td, &oldset); 1200 return (0); 1201 nfsmout: 1202 m_freem(nd->nd_mrep); 1203 m_freem(nd->nd_mreq); 1204 if (usegssname == 0) 1205 AUTH_DESTROY(auth); 1206 if (rep != NULL) 1207 free(rep, M_NFSDREQ); 1208 if (set_sigset) 1209 newnfs_restore_sigmask(td, &oldset); 1210 return (error); 1211 } 1212 1213 /* 1214 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 1215 * wait for all requests to complete. This is used by forced unmounts 1216 * to terminate any outstanding RPCs. 1217 */ 1218 int 1219 newnfs_nmcancelreqs(struct nfsmount *nmp) 1220 { 1221 struct nfsclds *dsp; 1222 struct __rpc_client *cl; 1223 1224 if (nmp->nm_sockreq.nr_client != NULL) 1225 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 1226 lookformore: 1227 NFSLOCKMNT(nmp); 1228 TAILQ_FOREACH(dsp, &nmp->nm_sess, nfsclds_list) { 1229 NFSLOCKDS(dsp); 1230 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1231 (dsp->nfsclds_flags & NFSCLDS_CLOSED) == 0 && 1232 dsp->nfsclds_sockp != NULL && 1233 dsp->nfsclds_sockp->nr_client != NULL) { 1234 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 1235 cl = dsp->nfsclds_sockp->nr_client; 1236 NFSUNLOCKDS(dsp); 1237 NFSUNLOCKMNT(nmp); 1238 CLNT_CLOSE(cl); 1239 goto lookformore; 1240 } 1241 NFSUNLOCKDS(dsp); 1242 } 1243 NFSUNLOCKMNT(nmp); 1244 return (0); 1245 } 1246 1247 /* 1248 * Any signal that can interrupt an NFS operation in an intr mount 1249 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 1250 */ 1251 int newnfs_sig_set[] = { 1252 SIGINT, 1253 SIGTERM, 1254 SIGHUP, 1255 SIGKILL, 1256 SIGQUIT 1257 }; 1258 1259 /* 1260 * Check to see if one of the signals in our subset is pending on 1261 * the process (in an intr mount). 1262 */ 1263 static int 1264 nfs_sig_pending(sigset_t set) 1265 { 1266 int i; 1267 1268 for (i = 0 ; i < nitems(newnfs_sig_set); i++) 1269 if (SIGISMEMBER(set, newnfs_sig_set[i])) 1270 return (1); 1271 return (0); 1272 } 1273 1274 /* 1275 * The set/restore sigmask functions are used to (temporarily) overwrite 1276 * the thread td_sigmask during an RPC call (for example). These are also 1277 * used in other places in the NFS client that might tsleep(). 1278 */ 1279 void 1280 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 1281 { 1282 sigset_t newset; 1283 int i; 1284 struct proc *p; 1285 1286 SIGFILLSET(newset); 1287 if (td == NULL) 1288 td = curthread; /* XXX */ 1289 p = td->td_proc; 1290 /* Remove the NFS set of signals from newset */ 1291 PROC_LOCK(p); 1292 mtx_lock(&p->p_sigacts->ps_mtx); 1293 for (i = 0 ; i < nitems(newnfs_sig_set); i++) { 1294 /* 1295 * But make sure we leave the ones already masked 1296 * by the process, ie. remove the signal from the 1297 * temporary signalmask only if it wasn't already 1298 * in p_sigmask. 1299 */ 1300 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 1301 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 1302 SIGDELSET(newset, newnfs_sig_set[i]); 1303 } 1304 mtx_unlock(&p->p_sigacts->ps_mtx); 1305 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 1306 SIGPROCMASK_PROC_LOCKED); 1307 PROC_UNLOCK(p); 1308 } 1309 1310 void 1311 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 1312 { 1313 if (td == NULL) 1314 td = curthread; /* XXX */ 1315 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 1316 } 1317 1318 /* 1319 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 1320 * old one after msleep() returns. 1321 */ 1322 int 1323 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 1324 { 1325 sigset_t oldset; 1326 int error; 1327 1328 if ((priority & PCATCH) == 0) 1329 return msleep(ident, mtx, priority, wmesg, timo); 1330 if (td == NULL) 1331 td = curthread; /* XXX */ 1332 newnfs_set_sigmask(td, &oldset); 1333 error = msleep(ident, mtx, priority, wmesg, timo); 1334 newnfs_restore_sigmask(td, &oldset); 1335 return (error); 1336 } 1337 1338 /* 1339 * Test for a termination condition pending on the process. 1340 * This is used for NFSMNT_INT mounts. 1341 */ 1342 int 1343 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 1344 { 1345 struct proc *p; 1346 sigset_t tmpset; 1347 1348 /* Terminate all requests while attempting a forced unmount. */ 1349 if (NFSCL_FORCEDISM(nmp->nm_mountp)) 1350 return (EIO); 1351 if (!(nmp->nm_flag & NFSMNT_INT)) 1352 return (0); 1353 if (td == NULL) 1354 return (0); 1355 p = td->td_proc; 1356 PROC_LOCK(p); 1357 tmpset = p->p_siglist; 1358 SIGSETOR(tmpset, td->td_siglist); 1359 SIGSETNAND(tmpset, td->td_sigmask); 1360 mtx_lock(&p->p_sigacts->ps_mtx); 1361 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 1362 mtx_unlock(&p->p_sigacts->ps_mtx); 1363 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 1364 && nfs_sig_pending(tmpset)) { 1365 PROC_UNLOCK(p); 1366 return (EINTR); 1367 } 1368 PROC_UNLOCK(p); 1369 return (0); 1370 } 1371 1372 static int 1373 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1374 { 1375 struct proc *p; 1376 1377 p = td ? td->td_proc : NULL; 1378 if (error) { 1379 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n", 1380 server, msg, error); 1381 } else { 1382 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg); 1383 } 1384 return (0); 1385 } 1386 1387 static void 1388 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1389 int error, int flags) 1390 { 1391 if (nmp == NULL) 1392 return; 1393 mtx_lock(&nmp->nm_mtx); 1394 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1395 nmp->nm_state |= NFSSTA_TIMEO; 1396 mtx_unlock(&nmp->nm_mtx); 1397 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1398 VQ_NOTRESP, 0); 1399 } else 1400 mtx_unlock(&nmp->nm_mtx); 1401 mtx_lock(&nmp->nm_mtx); 1402 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1403 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1404 mtx_unlock(&nmp->nm_mtx); 1405 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1406 VQ_NOTRESPLOCK, 0); 1407 } else 1408 mtx_unlock(&nmp->nm_mtx); 1409 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1410 } 1411 1412 static void 1413 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1414 int flags, int tprintfmsg) 1415 { 1416 if (nmp == NULL) 1417 return; 1418 if (tprintfmsg) { 1419 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1420 } 1421 1422 mtx_lock(&nmp->nm_mtx); 1423 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1424 nmp->nm_state &= ~NFSSTA_TIMEO; 1425 mtx_unlock(&nmp->nm_mtx); 1426 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1427 VQ_NOTRESP, 1); 1428 } else 1429 mtx_unlock(&nmp->nm_mtx); 1430 1431 mtx_lock(&nmp->nm_mtx); 1432 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1433 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1434 mtx_unlock(&nmp->nm_mtx); 1435 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1436 VQ_NOTRESPLOCK, 1); 1437 } else 1438 mtx_unlock(&nmp->nm_mtx); 1439 } 1440