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