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