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