Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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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: releng/10.4/sys/fs/nfs/nfs_commonkrpc.c 320637 2017-07-04 01:28:17Z rmacklem $"); 36 37 /* 38 * Socket operations for use by nfs 39 */ 40 41 #include "opt_kdtrace.h" 42 #include "opt_kgssapi.h" 43 #include "opt_nfs.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/limits.h> 49 #include <sys/lock.h> 50 #include <sys/malloc.h> 51 #include <sys/mbuf.h> 52 #include <sys/mount.h> 53 #include <sys/mutex.h> 54 #include <sys/proc.h> 55 #include <sys/signalvar.h> 56 #include <sys/syscallsubr.h> 57 #include <sys/sysctl.h> 58 #include <sys/syslog.h> 59 #include <sys/vnode.h> 60 61 #include <rpc/rpc.h> 62 #include <rpc/krpc.h> 63 64 #include <kgssapi/krb5/kcrypto.h> 65 66 #include <fs/nfs/nfsport.h> 67 68 #ifdef KDTRACE_HOOKS 69 #include <sys/dtrace_bsd.h> 70 71 dtrace_nfsclient_nfs23_start_probe_func_t 72 dtrace_nfscl_nfs234_start_probe; 73 74 dtrace_nfsclient_nfs23_done_probe_func_t 75 dtrace_nfscl_nfs234_done_probe; 76 77 /* 78 * Registered probes by RPC type. 79 */ 80 uint32_t nfscl_nfs2_start_probes[NFSV41_NPROCS + 1]; 81 uint32_t nfscl_nfs2_done_probes[NFSV41_NPROCS + 1]; 82 83 uint32_t nfscl_nfs3_start_probes[NFSV41_NPROCS + 1]; 84 uint32_t nfscl_nfs3_done_probes[NFSV41_NPROCS + 1]; 85 86 uint32_t nfscl_nfs4_start_probes[NFSV41_NPROCS + 1]; 87 uint32_t nfscl_nfs4_done_probes[NFSV41_NPROCS + 1]; 88 #endif 89 90 NFSSTATESPINLOCK; 91 NFSREQSPINLOCK; 92 NFSDLOCKMUTEX; 93 NFSCLSTATEMUTEX; 94 extern struct nfsstats newnfsstats; 95 extern struct nfsreqhead nfsd_reqq; 96 extern int nfscl_ticks; 97 extern void (*ncl_call_invalcaches)(struct vnode *); 98 extern int nfs_numnfscbd; 99 extern int nfscl_debuglevel; 100 101 SVCPOOL *nfscbd_pool; 102 static int nfsrv_gsscallbackson = 0; 103 static int nfs_bufpackets = 4; 104 static int nfs_reconnects; 105 static int nfs3_jukebox_delay = 10; 106 static int nfs_skip_wcc_data_onerr = 1; 107 108 SYSCTL_DECL(_vfs_nfs); 109 110 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, 111 "Buffer reservation size 2 < x < 64"); 112 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, 113 "Number of times the nfs client has had to reconnect"); 114 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0, 115 "Number of seconds to delay a retry after receiving EJUKEBOX"); 116 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0, 117 "Disable weak cache consistency checking when server returns an error"); 118 119 static void nfs_down(struct nfsmount *, struct thread *, const char *, 120 int, int); 121 static void nfs_up(struct nfsmount *, struct thread *, const char *, 122 int, int); 123 static int nfs_msg(struct thread *, const char *, const char *, int); 124 125 struct nfs_cached_auth { 126 int ca_refs; /* refcount, including 1 from the cache */ 127 uid_t ca_uid; /* uid that corresponds to this auth */ 128 AUTH *ca_auth; /* RPC auth handle */ 129 }; 130 131 static int nfsv2_procid[NFS_V3NPROCS] = { 132 NFSV2PROC_NULL, 133 NFSV2PROC_GETATTR, 134 NFSV2PROC_SETATTR, 135 NFSV2PROC_LOOKUP, 136 NFSV2PROC_NOOP, 137 NFSV2PROC_READLINK, 138 NFSV2PROC_READ, 139 NFSV2PROC_WRITE, 140 NFSV2PROC_CREATE, 141 NFSV2PROC_MKDIR, 142 NFSV2PROC_SYMLINK, 143 NFSV2PROC_CREATE, 144 NFSV2PROC_REMOVE, 145 NFSV2PROC_RMDIR, 146 NFSV2PROC_RENAME, 147 NFSV2PROC_LINK, 148 NFSV2PROC_READDIR, 149 NFSV2PROC_NOOP, 150 NFSV2PROC_STATFS, 151 NFSV2PROC_NOOP, 152 NFSV2PROC_NOOP, 153 NFSV2PROC_NOOP, 154 }; 155 156 /* 157 * Initialize sockets and congestion for a new NFS connection. 158 * We do not free the sockaddr if error. 159 */ 160 int 161 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp, 162 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult) 163 { 164 int rcvreserve, sndreserve; 165 int pktscale, pktscalesav; 166 struct sockaddr *saddr; 167 struct ucred *origcred; 168 CLIENT *client; 169 struct netconfig *nconf; 170 struct socket *so; 171 int one = 1, retries, error = 0; 172 struct thread *td = curthread; 173 SVCXPRT *xprt; 174 struct timeval timo; 175 176 /* 177 * We need to establish the socket using the credentials of 178 * the mountpoint. Some parts of this process (such as 179 * sobind() and soconnect()) will use the curent thread's 180 * credential instead of the socket credential. To work 181 * around this, temporarily change the current thread's 182 * credential to that of the mountpoint. 183 * 184 * XXX: It would be better to explicitly pass the correct 185 * credential to sobind() and soconnect(). 186 */ 187 origcred = td->td_ucred; 188 189 /* 190 * Use the credential in nr_cred, if not NULL. 191 */ 192 if (nrp->nr_cred != NULL) 193 td->td_ucred = nrp->nr_cred; 194 else 195 td->td_ucred = cred; 196 saddr = nrp->nr_nam; 197 198 if (saddr->sa_family == AF_INET) 199 if (nrp->nr_sotype == SOCK_DGRAM) 200 nconf = getnetconfigent("udp"); 201 else 202 nconf = getnetconfigent("tcp"); 203 else 204 if (nrp->nr_sotype == SOCK_DGRAM) 205 nconf = getnetconfigent("udp6"); 206 else 207 nconf = getnetconfigent("tcp6"); 208 209 pktscale = nfs_bufpackets; 210 if (pktscale < 2) 211 pktscale = 2; 212 if (pktscale > 64) 213 pktscale = 64; 214 pktscalesav = pktscale; 215 /* 216 * soreserve() can fail if sb_max is too small, so shrink pktscale 217 * and try again if there is an error. 218 * Print a log message suggesting increasing sb_max. 219 * Creating a socket and doing this is necessary since, if the 220 * reservation sizes are too large and will make soreserve() fail, 221 * the connection will work until a large send is attempted and 222 * then it will loop in the krpc code. 223 */ 224 so = NULL; 225 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *); 226 error = socreate(saddr->sa_family, &so, nrp->nr_sotype, 227 nrp->nr_soproto, td->td_ucred, td); 228 if (error) { 229 td->td_ucred = origcred; 230 goto out; 231 } 232 do { 233 if (error != 0 && pktscale > 2) { 234 if (nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 235 pktscale == pktscalesav) 236 printf("Consider increasing kern.ipc.maxsockbuf\n"); 237 pktscale--; 238 } 239 if (nrp->nr_sotype == SOCK_DGRAM) { 240 if (nmp != NULL) { 241 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 242 pktscale; 243 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 244 pktscale; 245 } else { 246 sndreserve = rcvreserve = 1024 * pktscale; 247 } 248 } else { 249 if (nrp->nr_sotype != SOCK_STREAM) 250 panic("nfscon sotype"); 251 if (nmp != NULL) { 252 sndreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 253 sizeof (u_int32_t)) * pktscale; 254 rcvreserve = (NFS_MAXBSIZE + NFS_MAXXDR + 255 sizeof (u_int32_t)) * pktscale; 256 } else { 257 sndreserve = rcvreserve = 1024 * pktscale; 258 } 259 } 260 error = soreserve(so, sndreserve, rcvreserve); 261 if (error != 0 && nmp != NULL && nrp->nr_sotype == SOCK_STREAM && 262 pktscale <= 2) 263 printf("Must increase kern.ipc.maxsockbuf or reduce" 264 " rsize, wsize\n"); 265 } while (error != 0 && pktscale > 2); 266 soclose(so); 267 if (error) { 268 td->td_ucred = origcred; 269 goto out; 270 } 271 272 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 273 nrp->nr_vers, sndreserve, rcvreserve); 274 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq"); 275 if (nmp != NULL) { 276 if ((nmp->nm_flag & NFSMNT_INT)) 277 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 278 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 279 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 280 if (NFSHASSOFT(nmp)) { 281 if (nmp->nm_sotype == SOCK_DGRAM) 282 /* 283 * For UDP, the large timeout for a reconnect 284 * will be set to "nm_retry * nm_timeo / 2", so 285 * we only want to do 2 reconnect timeout 286 * retries. 287 */ 288 retries = 2; 289 else 290 retries = nmp->nm_retry; 291 } else 292 retries = INT_MAX; 293 /* cred == NULL for DS connects. */ 294 if (NFSHASNFSV4N(nmp) && cred != NULL) { 295 /* 296 * Make sure the nfscbd_pool doesn't get destroyed 297 * while doing this. 298 */ 299 NFSD_LOCK(); 300 if (nfs_numnfscbd > 0) { 301 nfs_numnfscbd++; 302 NFSD_UNLOCK(); 303 xprt = svc_vc_create_backchannel(nfscbd_pool); 304 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt); 305 NFSD_LOCK(); 306 nfs_numnfscbd--; 307 if (nfs_numnfscbd == 0) 308 wakeup(&nfs_numnfscbd); 309 } 310 NFSD_UNLOCK(); 311 } 312 } else { 313 /* 314 * Three cases: 315 * - Null RPC callback to client 316 * - Non-Null RPC callback to client, wait a little longer 317 * - upcalls to nfsuserd and gssd (clp == NULL) 318 */ 319 if (callback_retry_mult == 0) { 320 retries = NFSV4_UPCALLRETRY; 321 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 322 } else { 323 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 324 } 325 } 326 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 327 328 if (nmp != NULL) { 329 /* 330 * For UDP, there are 2 timeouts: 331 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer 332 * that does a retransmit of an RPC request using the same 333 * socket and xid. This is what you normally want to do, 334 * since NFS servers depend on "same xid" for their 335 * Duplicate Request Cache. 336 * - timeout specified in CLNT_CALL_MBUF(), which specifies when 337 * retransmits on the same socket should fail and a fresh 338 * socket created. Each of these timeouts counts as one 339 * CLSET_RETRIES as set above. 340 * Set the initial retransmit timeout for UDP. This timeout 341 * doesn't exist for TCP and the following call just fails, 342 * which is ok. 343 */ 344 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 345 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ; 346 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo); 347 } 348 349 mtx_lock(&nrp->nr_mtx); 350 if (nrp->nr_client != NULL) { 351 mtx_unlock(&nrp->nr_mtx); 352 /* 353 * Someone else already connected. 354 */ 355 CLNT_RELEASE(client); 356 } else { 357 nrp->nr_client = client; 358 /* 359 * Protocols that do not require connections may be optionally 360 * left unconnected for servers that reply from a port other 361 * than NFS_PORT. 362 */ 363 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 364 mtx_unlock(&nrp->nr_mtx); 365 CLNT_CONTROL(client, CLSET_CONNECT, &one); 366 } else 367 mtx_unlock(&nrp->nr_mtx); 368 } 369 370 371 /* Restore current thread's credentials. */ 372 td->td_ucred = origcred; 373 374 out: 375 NFSEXITCODE(error); 376 return (error); 377 } 378 379 /* 380 * NFS disconnect. Clean up and unlink. 381 */ 382 void 383 newnfs_disconnect(struct nfssockreq *nrp) 384 { 385 CLIENT *client; 386 387 mtx_lock(&nrp->nr_mtx); 388 if (nrp->nr_client != NULL) { 389 client = nrp->nr_client; 390 nrp->nr_client = NULL; 391 mtx_unlock(&nrp->nr_mtx); 392 rpc_gss_secpurge_call(client); 393 CLNT_CLOSE(client); 394 CLNT_RELEASE(client); 395 } else { 396 mtx_unlock(&nrp->nr_mtx); 397 } 398 } 399 400 static AUTH * 401 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 402 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 403 { 404 rpc_gss_service_t svc; 405 AUTH *auth; 406 407 switch (secflavour) { 408 case RPCSEC_GSS_KRB5: 409 case RPCSEC_GSS_KRB5I: 410 case RPCSEC_GSS_KRB5P: 411 if (!mech_oid) { 412 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 413 return (NULL); 414 } 415 if (secflavour == RPCSEC_GSS_KRB5) 416 svc = rpc_gss_svc_none; 417 else if (secflavour == RPCSEC_GSS_KRB5I) 418 svc = rpc_gss_svc_integrity; 419 else 420 svc = rpc_gss_svc_privacy; 421 422 if (clnt_principal == NULL) 423 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 424 srv_principal, mech_oid, svc); 425 else { 426 auth = rpc_gss_seccreate_call(nrp->nr_client, cred, 427 clnt_principal, srv_principal, "kerberosv5", 428 svc, NULL, NULL, NULL); 429 return (auth); 430 } 431 if (auth != NULL) 432 return (auth); 433 /* fallthrough */ 434 case AUTH_SYS: 435 default: 436 return (authunix_create(cred)); 437 438 } 439 } 440 441 /* 442 * Callback from the RPC code to generate up/down notifications. 443 */ 444 445 struct nfs_feedback_arg { 446 struct nfsmount *nf_mount; 447 int nf_lastmsg; /* last tprintf */ 448 int nf_tprintfmsg; 449 struct thread *nf_td; 450 }; 451 452 static void 453 nfs_feedback(int type, int proc, void *arg) 454 { 455 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 456 struct nfsmount *nmp = nf->nf_mount; 457 time_t now; 458 459 switch (type) { 460 case FEEDBACK_REXMIT2: 461 case FEEDBACK_RECONNECT: 462 now = NFSD_MONOSEC; 463 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) { 464 nfs_down(nmp, nf->nf_td, 465 "not responding", 0, NFSSTA_TIMEO); 466 nf->nf_tprintfmsg = TRUE; 467 nf->nf_lastmsg = now; 468 } 469 break; 470 471 case FEEDBACK_OK: 472 nfs_up(nf->nf_mount, nf->nf_td, 473 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 474 break; 475 } 476 } 477 478 /* 479 * newnfs_request - goes something like this 480 * - does the rpc by calling the krpc layer 481 * - break down rpc header and return with nfs reply 482 * nb: always frees up nd_mreq mbuf list 483 */ 484 int 485 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 486 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 487 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 488 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep) 489 { 490 uint32_t retseq, retval, slotseq, *tl; 491 time_t waituntil; 492 int i = 0, j = 0, opcnt, set_sigset = 0, slot; 493 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS; 494 int freeslot, maxslot, reterr, slotpos, timeo; 495 u_int16_t procnum; 496 u_int trylater_delay = 1; 497 struct nfs_feedback_arg nf; 498 struct timeval timo; 499 AUTH *auth; 500 struct rpc_callextra ext; 501 enum clnt_stat stat; 502 struct nfsreq *rep = NULL; 503 char *srv_principal = NULL, *clnt_principal = NULL; 504 sigset_t oldset; 505 struct ucred *authcred; 506 struct nfsclsession *sep; 507 uint8_t sessionid[NFSX_V4SESSIONID]; 508 509 sep = dssep; 510 if (xidp != NULL) 511 *xidp = 0; 512 /* Reject requests while attempting a forced unmount. */ 513 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) { 514 m_freem(nd->nd_mreq); 515 return (ESTALE); 516 } 517 518 /* 519 * Set authcred, which is used to acquire RPC credentials to 520 * the cred argument, by default. The crhold() should not be 521 * necessary, but will ensure that some future code change 522 * doesn't result in the credential being free'd prematurely. 523 */ 524 authcred = crhold(cred); 525 526 /* For client side interruptible mounts, mask off the signals. */ 527 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 528 newnfs_set_sigmask(td, &oldset); 529 set_sigset = 1; 530 } 531 532 /* 533 * XXX if not already connected call nfs_connect now. Longer 534 * term, change nfs_mount to call nfs_connect unconditionally 535 * and let clnt_reconnect_create handle reconnects. 536 */ 537 if (nrp->nr_client == NULL) 538 newnfs_connect(nmp, nrp, cred, td, 0); 539 540 /* 541 * For a client side mount, nmp is != NULL and clp == NULL. For 542 * server calls (callbacks or upcalls), nmp == NULL. 543 */ 544 if (clp != NULL) { 545 NFSLOCKSTATE(); 546 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 547 secflavour = RPCSEC_GSS_KRB5; 548 if (nd->nd_procnum != NFSPROC_NULL) { 549 if (clp->lc_flags & LCL_GSSINTEGRITY) 550 secflavour = RPCSEC_GSS_KRB5I; 551 else if (clp->lc_flags & LCL_GSSPRIVACY) 552 secflavour = RPCSEC_GSS_KRB5P; 553 } 554 } 555 NFSUNLOCKSTATE(); 556 } else if (nmp != NULL && NFSHASKERB(nmp) && 557 nd->nd_procnum != NFSPROC_NULL) { 558 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 559 nd->nd_flag |= ND_USEGSSNAME; 560 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 561 /* 562 * If there is a client side host based credential, 563 * use that, otherwise use the system uid, if set. 564 * The system uid is in the nmp->nm_sockreq.nr_cred 565 * credentials. 566 */ 567 if (nmp->nm_krbnamelen > 0) { 568 usegssname = 1; 569 clnt_principal = nmp->nm_krbname; 570 } else if (nmp->nm_uid != (uid_t)-1) { 571 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 572 ("newnfs_request: NULL nr_cred")); 573 crfree(authcred); 574 authcred = crhold(nmp->nm_sockreq.nr_cred); 575 } 576 } else if (nmp->nm_krbnamelen == 0 && 577 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 578 /* 579 * If there is no host based principal name and 580 * the system uid is set and this is root, use the 581 * system uid, since root won't have user 582 * credentials in a credentials cache file. 583 * The system uid is in the nmp->nm_sockreq.nr_cred 584 * credentials. 585 */ 586 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 587 ("newnfs_request: NULL nr_cred")); 588 crfree(authcred); 589 authcred = crhold(nmp->nm_sockreq.nr_cred); 590 } 591 if (NFSHASINTEGRITY(nmp)) 592 secflavour = RPCSEC_GSS_KRB5I; 593 else if (NFSHASPRIVACY(nmp)) 594 secflavour = RPCSEC_GSS_KRB5P; 595 else 596 secflavour = RPCSEC_GSS_KRB5; 597 srv_principal = NFSMNT_SRVKRBNAME(nmp); 598 } else if (nmp != NULL && !NFSHASKERB(nmp) && 599 nd->nd_procnum != NFSPROC_NULL && 600 (nd->nd_flag & ND_USEGSSNAME) != 0) { 601 /* 602 * Use the uid that did the mount when the RPC is doing 603 * NFSv4 system operations, as indicated by the 604 * ND_USEGSSNAME flag, for the AUTH_SYS case. 605 * The credentials in nm_sockreq.nr_cred were used for the 606 * mount. 607 */ 608 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 609 ("newnfs_request: NULL nr_cred")); 610 crfree(authcred); 611 authcred = crhold(nmp->nm_sockreq.nr_cred); 612 } 613 614 if (nmp != NULL) { 615 bzero(&nf, sizeof(struct nfs_feedback_arg)); 616 nf.nf_mount = nmp; 617 nf.nf_td = td; 618 nf.nf_lastmsg = NFSD_MONOSEC - 619 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 620 } 621 622 if (nd->nd_procnum == NFSPROC_NULL) 623 auth = authnone_create(); 624 else if (usegssname) { 625 /* 626 * For this case, the authenticator is held in the 627 * nfssockreq structure, so don't release the reference count 628 * held on it. --> Don't AUTH_DESTROY() it in this function. 629 */ 630 if (nrp->nr_auth == NULL) 631 nrp->nr_auth = nfs_getauth(nrp, secflavour, 632 clnt_principal, srv_principal, NULL, authcred); 633 else 634 rpc_gss_refresh_auth_call(nrp->nr_auth); 635 auth = nrp->nr_auth; 636 } else 637 auth = nfs_getauth(nrp, secflavour, NULL, 638 srv_principal, NULL, authcred); 639 crfree(authcred); 640 if (auth == NULL) { 641 m_freem(nd->nd_mreq); 642 if (set_sigset) 643 newnfs_restore_sigmask(td, &oldset); 644 return (EACCES); 645 } 646 bzero(&ext, sizeof(ext)); 647 ext.rc_auth = auth; 648 if (nmp != NULL) { 649 ext.rc_feedback = nfs_feedback; 650 ext.rc_feedback_arg = &nf; 651 } 652 653 procnum = nd->nd_procnum; 654 if ((nd->nd_flag & ND_NFSV4) && 655 nd->nd_procnum != NFSPROC_NULL && 656 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 657 procnum = NFSV4PROC_COMPOUND; 658 659 if (nmp != NULL) { 660 NFSINCRGLOBAL(newnfsstats.rpcrequests); 661 662 /* Map the procnum to the old NFSv2 one, as required. */ 663 if ((nd->nd_flag & ND_NFSV2) != 0) { 664 if (nd->nd_procnum < NFS_V3NPROCS) 665 procnum = nfsv2_procid[nd->nd_procnum]; 666 else 667 procnum = NFSV2PROC_NOOP; 668 } 669 670 /* 671 * Now only used for the R_DONTRECOVER case, but until that is 672 * supported within the krpc code, I need to keep a queue of 673 * outstanding RPCs for nfsv4 client requests. 674 */ 675 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 676 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), 677 M_NFSDREQ, M_WAITOK); 678 #ifdef KDTRACE_HOOKS 679 if (dtrace_nfscl_nfs234_start_probe != NULL) { 680 uint32_t probe_id; 681 int probe_procnum; 682 683 if (nd->nd_flag & ND_NFSV4) { 684 probe_id = 685 nfscl_nfs4_start_probes[nd->nd_procnum]; 686 probe_procnum = nd->nd_procnum; 687 } else if (nd->nd_flag & ND_NFSV3) { 688 probe_id = nfscl_nfs3_start_probes[procnum]; 689 probe_procnum = procnum; 690 } else { 691 probe_id = 692 nfscl_nfs2_start_probes[nd->nd_procnum]; 693 probe_procnum = procnum; 694 } 695 if (probe_id != 0) 696 (dtrace_nfscl_nfs234_start_probe) 697 (probe_id, vp, nd->nd_mreq, cred, 698 probe_procnum); 699 } 700 #endif 701 } 702 trycnt = 0; 703 freeslot = -1; /* Set to slot that needs to be free'd */ 704 tryagain: 705 slot = -1; /* Slot that needs a sequence# increment. */ 706 /* 707 * This timeout specifies when a new socket should be created, 708 * along with new xid values. For UDP, this should be done 709 * infrequently, since retransmits of RPC requests should normally 710 * use the same xid. 711 */ 712 if (nmp == NULL) { 713 timo.tv_usec = 0; 714 if (clp == NULL) 715 timo.tv_sec = NFSV4_UPCALLTIMEO; 716 else 717 timo.tv_sec = NFSV4_CALLBACKTIMEO; 718 } else { 719 if (nrp->nr_sotype != SOCK_DGRAM) { 720 timo.tv_usec = 0; 721 if ((nmp->nm_flag & NFSMNT_NFSV4)) 722 timo.tv_sec = INT_MAX; 723 else 724 timo.tv_sec = NFS_TCPTIMEO; 725 } else { 726 if (NFSHASSOFT(nmp)) { 727 /* 728 * CLSET_RETRIES is set to 2, so this should be 729 * half of the total timeout required. 730 */ 731 timeo = nmp->nm_retry * nmp->nm_timeo / 2; 732 if (timeo < 1) 733 timeo = 1; 734 timo.tv_sec = timeo / NFS_HZ; 735 timo.tv_usec = (timeo % NFS_HZ) * 1000000 / 736 NFS_HZ; 737 } else { 738 /* For UDP hard mounts, use a large value. */ 739 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ; 740 timo.tv_usec = 0; 741 } 742 } 743 744 if (rep != NULL) { 745 rep->r_flags = 0; 746 rep->r_nmp = nmp; 747 /* 748 * Chain request into list of outstanding requests. 749 */ 750 NFSLOCKREQ(); 751 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 752 NFSUNLOCKREQ(); 753 } 754 } 755 756 nd->nd_mrep = NULL; 757 if (clp != NULL && sep != NULL) 758 stat = clnt_bck_call(nrp->nr_client, &ext, procnum, 759 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt); 760 else 761 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, 762 nd->nd_mreq, &nd->nd_mrep, timo); 763 764 if (rep != NULL) { 765 /* 766 * RPC done, unlink the request. 767 */ 768 NFSLOCKREQ(); 769 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 770 NFSUNLOCKREQ(); 771 } 772 773 /* 774 * If there was a successful reply and a tprintf msg. 775 * tprintf a response. 776 */ 777 if (stat == RPC_SUCCESS) { 778 error = 0; 779 } else if (stat == RPC_TIMEDOUT) { 780 NFSINCRGLOBAL(newnfsstats.rpctimeouts); 781 error = ETIMEDOUT; 782 } else if (stat == RPC_VERSMISMATCH) { 783 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 784 error = EOPNOTSUPP; 785 } else if (stat == RPC_PROGVERSMISMATCH) { 786 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 787 error = EPROTONOSUPPORT; 788 } else if (stat == RPC_INTR) { 789 error = EINTR; 790 } else { 791 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 792 error = EACCES; 793 } 794 if (error) { 795 m_freem(nd->nd_mreq); 796 if (usegssname == 0) 797 AUTH_DESTROY(auth); 798 if (rep != NULL) 799 FREE((caddr_t)rep, M_NFSDREQ); 800 if (set_sigset) 801 newnfs_restore_sigmask(td, &oldset); 802 return (error); 803 } 804 805 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 806 807 /* 808 * Search for any mbufs that are not a multiple of 4 bytes long 809 * or with m_data not longword aligned. 810 * These could cause pointer alignment problems, so copy them to 811 * well aligned mbufs. 812 */ 813 newnfs_realign(&nd->nd_mrep, M_WAITOK); 814 nd->nd_md = nd->nd_mrep; 815 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 816 nd->nd_repstat = 0; 817 if (nd->nd_procnum != NFSPROC_NULL && 818 nd->nd_procnum != NFSV4PROC_CBNULL) { 819 /* If sep == NULL, set it to the default in nmp. */ 820 if (sep == NULL && nmp != NULL) 821 sep = nfsmnt_mdssession(nmp); 822 /* 823 * and now the actual NFS xdr. 824 */ 825 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 826 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 827 if (nd->nd_repstat >= 10000) 828 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum, 829 (int)nd->nd_repstat); 830 831 /* 832 * Get rid of the tag, return count and SEQUENCE result for 833 * NFSv4. 834 */ 835 if ((nd->nd_flag & ND_NFSV4) != 0) { 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 && j == 0) 855 ) { 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 /* 899 * If this is a client side MDS RPC, mark 900 * the MDS session defunct and initiate 901 * recovery, as required. 902 * The nfsess_defunct field is protected by 903 * the NFSLOCKMNT()/nm_mtx lock and not the 904 * nfsess_mtx lock to simplify its handling, 905 * for the MDS session. This lock is also 906 * sufficient for nfsess_sessionid, since it 907 * never changes in the structure. 908 */ 909 NFSCL_DEBUG(1, "Got badsession\n"); 910 NFSLOCKCLSTATE(); 911 NFSLOCKMNT(nmp); 912 sep = NFSMNT_MDSSESSION(nmp); 913 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence, 914 NFSX_V4SESSIONID) == 0) { 915 /* Initiate recovery. */ 916 sep->nfsess_defunct = 1; 917 NFSCL_DEBUG(1, "Marked defunct\n"); 918 if (nmp->nm_clp != NULL) { 919 nmp->nm_clp->nfsc_flags |= 920 NFSCLFLAGS_RECOVER; 921 wakeup(nmp->nm_clp); 922 } 923 } 924 NFSUNLOCKCLSTATE(); 925 /* 926 * Sleep for up to 1sec waiting for a new 927 * session. 928 */ 929 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO, 930 "nfsbadsess", hz); 931 /* 932 * Get the session again, in case a new one 933 * has been created during the sleep. 934 */ 935 sep = NFSMNT_MDSSESSION(nmp); 936 NFSUNLOCKMNT(nmp); 937 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) { 938 reterr = nfsv4_sequencelookup(nmp, sep, 939 &slotpos, &maxslot, &slotseq, 940 sessionid); 941 if (reterr == 0) { 942 /* Fill in new session info. */ 943 NFSCL_DEBUG(1, 944 "Filling in new sequence\n"); 945 tl = nd->nd_sequence; 946 bcopy(sessionid, tl, 947 NFSX_V4SESSIONID); 948 tl += NFSX_V4SESSIONID / 949 NFSX_UNSIGNED; 950 *tl++ = txdr_unsigned(slotseq); 951 *tl++ = txdr_unsigned(slotpos); 952 *tl = txdr_unsigned(maxslot); 953 } 954 if (reterr == NFSERR_BADSESSION || 955 reterr == 0) { 956 NFSCL_DEBUG(1, 957 "Badsession looping\n"); 958 m_freem(nd->nd_mrep); 959 nd->nd_mrep = NULL; 960 goto tryagain; 961 } 962 nd->nd_repstat = reterr; 963 NFSCL_DEBUG(1, "Got err=%d\n", reterr); 964 } 965 } 966 if (((nd->nd_repstat == NFSERR_DELAY || 967 nd->nd_repstat == NFSERR_GRACE) && 968 (nd->nd_flag & ND_NFSV4) && 969 nd->nd_procnum != NFSPROC_DELEGRETURN && 970 nd->nd_procnum != NFSPROC_SETATTR && 971 nd->nd_procnum != NFSPROC_READ && 972 nd->nd_procnum != NFSPROC_READDS && 973 nd->nd_procnum != NFSPROC_WRITE && 974 nd->nd_procnum != NFSPROC_WRITEDS && 975 nd->nd_procnum != NFSPROC_OPEN && 976 nd->nd_procnum != NFSPROC_CREATE && 977 nd->nd_procnum != NFSPROC_OPENCONFIRM && 978 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 979 nd->nd_procnum != NFSPROC_CLOSE && 980 nd->nd_procnum != NFSPROC_LOCK && 981 nd->nd_procnum != NFSPROC_LOCKU) || 982 (nd->nd_repstat == NFSERR_DELAY && 983 (nd->nd_flag & ND_NFSV4) == 0) || 984 nd->nd_repstat == NFSERR_RESOURCE) { 985 if (trylater_delay > NFS_TRYLATERDEL) 986 trylater_delay = NFS_TRYLATERDEL; 987 waituntil = NFSD_MONOSEC + trylater_delay; 988 while (NFSD_MONOSEC < waituntil) 989 (void) nfs_catnap(PZERO, 0, "nfstry"); 990 trylater_delay *= 2; 991 if (slot != -1) { 992 mtx_lock(&sep->nfsess_mtx); 993 sep->nfsess_slotseq[slot]++; 994 *nd->nd_slotseq = txdr_unsigned( 995 sep->nfsess_slotseq[slot]); 996 mtx_unlock(&sep->nfsess_mtx); 997 } 998 m_freem(nd->nd_mrep); 999 nd->nd_mrep = NULL; 1000 goto tryagain; 1001 } 1002 1003 /* 1004 * If the File Handle was stale, invalidate the 1005 * lookup cache, just in case. 1006 * (vp != NULL implies a client side call) 1007 */ 1008 if (nd->nd_repstat == ESTALE && vp != NULL) { 1009 cache_purge(vp); 1010 if (ncl_call_invalcaches != NULL) 1011 (*ncl_call_invalcaches)(vp); 1012 } 1013 } 1014 if ((nd->nd_flag & ND_NFSV4) != 0) { 1015 /* Free the slot, as required. */ 1016 if (freeslot != -1) 1017 nfsv4_freeslot(sep, freeslot); 1018 /* 1019 * If this op is Putfh, throw its results away. 1020 */ 1021 if (j >= 10000) 1022 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j); 1023 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) { 1024 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 1025 i = fxdr_unsigned(int, *tl++); 1026 j = fxdr_unsigned(int, *tl); 1027 if (j >= 10000) 1028 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i, 1029 j); 1030 /* 1031 * All Compounds that do an Op that must 1032 * be in sequence consist of NFSV4OP_PUTFH 1033 * followed by one of these. As such, we 1034 * can determine if the seqid# should be 1035 * incremented, here. 1036 */ 1037 if ((i == NFSV4OP_OPEN || 1038 i == NFSV4OP_OPENCONFIRM || 1039 i == NFSV4OP_OPENDOWNGRADE || 1040 i == NFSV4OP_CLOSE || 1041 i == NFSV4OP_LOCK || 1042 i == NFSV4OP_LOCKU) && 1043 (j == 0 || 1044 (j != NFSERR_STALECLIENTID && 1045 j != NFSERR_STALESTATEID && 1046 j != NFSERR_BADSTATEID && 1047 j != NFSERR_BADSEQID && 1048 j != NFSERR_BADXDR && 1049 j != NFSERR_RESOURCE && 1050 j != NFSERR_NOFILEHANDLE))) 1051 nd->nd_flag |= ND_INCRSEQID; 1052 } 1053 /* 1054 * If this op's status is non-zero, mark 1055 * that there is no more data to process. 1056 * The exception is Setattr, which always has xdr 1057 * when it has failed. 1058 */ 1059 if (j != 0 && i != NFSV4OP_SETATTR) 1060 nd->nd_flag |= ND_NOMOREDATA; 1061 1062 /* 1063 * If R_DONTRECOVER is set, replace the stale error 1064 * reply, so that recovery isn't initiated. 1065 */ 1066 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 1067 nd->nd_repstat == NFSERR_BADSESSION || 1068 nd->nd_repstat == NFSERR_STALESTATEID) && 1069 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 1070 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 1071 } 1072 } 1073 1074 #ifdef KDTRACE_HOOKS 1075 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 1076 uint32_t probe_id; 1077 int probe_procnum; 1078 1079 if (nd->nd_flag & ND_NFSV4) { 1080 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 1081 probe_procnum = nd->nd_procnum; 1082 } else if (nd->nd_flag & ND_NFSV3) { 1083 probe_id = nfscl_nfs3_done_probes[procnum]; 1084 probe_procnum = procnum; 1085 } else { 1086 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 1087 probe_procnum = procnum; 1088 } 1089 if (probe_id != 0) 1090 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 1091 nd->nd_mreq, cred, probe_procnum, 0); 1092 } 1093 #endif 1094 1095 m_freem(nd->nd_mreq); 1096 if (usegssname == 0) 1097 AUTH_DESTROY(auth); 1098 if (rep != NULL) 1099 FREE((caddr_t)rep, M_NFSDREQ); 1100 if (set_sigset) 1101 newnfs_restore_sigmask(td, &oldset); 1102 return (0); 1103 nfsmout: 1104 mbuf_freem(nd->nd_mrep); 1105 mbuf_freem(nd->nd_mreq); 1106 if (usegssname == 0) 1107 AUTH_DESTROY(auth); 1108 if (rep != NULL) 1109 FREE((caddr_t)rep, M_NFSDREQ); 1110 if (set_sigset) 1111 newnfs_restore_sigmask(td, &oldset); 1112 return (error); 1113 } 1114 1115 /* 1116 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 1117 * wait for all requests to complete. This is used by forced unmounts 1118 * to terminate any outstanding RPCs. 1119 */ 1120 int 1121 newnfs_nmcancelreqs(struct nfsmount *nmp) 1122 { 1123 1124 if (nmp->nm_sockreq.nr_client != NULL) 1125 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 1126 return (0); 1127 } 1128 1129 /* 1130 * Any signal that can interrupt an NFS operation in an intr mount 1131 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 1132 */ 1133 int newnfs_sig_set[] = { 1134 SIGINT, 1135 SIGTERM, 1136 SIGHUP, 1137 SIGKILL, 1138 SIGQUIT 1139 }; 1140 1141 /* 1142 * Check to see if one of the signals in our subset is pending on 1143 * the process (in an intr mount). 1144 */ 1145 static int 1146 nfs_sig_pending(sigset_t set) 1147 { 1148 int i; 1149 1150 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) 1151 if (SIGISMEMBER(set, newnfs_sig_set[i])) 1152 return (1); 1153 return (0); 1154 } 1155 1156 /* 1157 * The set/restore sigmask functions are used to (temporarily) overwrite 1158 * the thread td_sigmask during an RPC call (for example). These are also 1159 * used in other places in the NFS client that might tsleep(). 1160 */ 1161 void 1162 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 1163 { 1164 sigset_t newset; 1165 int i; 1166 struct proc *p; 1167 1168 SIGFILLSET(newset); 1169 if (td == NULL) 1170 td = curthread; /* XXX */ 1171 p = td->td_proc; 1172 /* Remove the NFS set of signals from newset */ 1173 PROC_LOCK(p); 1174 mtx_lock(&p->p_sigacts->ps_mtx); 1175 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) { 1176 /* 1177 * But make sure we leave the ones already masked 1178 * by the process, ie. remove the signal from the 1179 * temporary signalmask only if it wasn't already 1180 * in p_sigmask. 1181 */ 1182 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 1183 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 1184 SIGDELSET(newset, newnfs_sig_set[i]); 1185 } 1186 mtx_unlock(&p->p_sigacts->ps_mtx); 1187 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 1188 SIGPROCMASK_PROC_LOCKED); 1189 PROC_UNLOCK(p); 1190 } 1191 1192 void 1193 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 1194 { 1195 if (td == NULL) 1196 td = curthread; /* XXX */ 1197 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 1198 } 1199 1200 /* 1201 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 1202 * old one after msleep() returns. 1203 */ 1204 int 1205 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 1206 { 1207 sigset_t oldset; 1208 int error; 1209 struct proc *p; 1210 1211 if ((priority & PCATCH) == 0) 1212 return msleep(ident, mtx, priority, wmesg, timo); 1213 if (td == NULL) 1214 td = curthread; /* XXX */ 1215 newnfs_set_sigmask(td, &oldset); 1216 error = msleep(ident, mtx, priority, wmesg, timo); 1217 newnfs_restore_sigmask(td, &oldset); 1218 p = td->td_proc; 1219 return (error); 1220 } 1221 1222 /* 1223 * Test for a termination condition pending on the process. 1224 * This is used for NFSMNT_INT mounts. 1225 */ 1226 int 1227 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 1228 { 1229 struct proc *p; 1230 sigset_t tmpset; 1231 1232 /* Terminate all requests while attempting a forced unmount. */ 1233 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) 1234 return (EIO); 1235 if (!(nmp->nm_flag & NFSMNT_INT)) 1236 return (0); 1237 if (td == NULL) 1238 return (0); 1239 p = td->td_proc; 1240 PROC_LOCK(p); 1241 tmpset = p->p_siglist; 1242 SIGSETOR(tmpset, td->td_siglist); 1243 SIGSETNAND(tmpset, td->td_sigmask); 1244 mtx_lock(&p->p_sigacts->ps_mtx); 1245 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 1246 mtx_unlock(&p->p_sigacts->ps_mtx); 1247 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 1248 && nfs_sig_pending(tmpset)) { 1249 PROC_UNLOCK(p); 1250 return (EINTR); 1251 } 1252 PROC_UNLOCK(p); 1253 return (0); 1254 } 1255 1256 static int 1257 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1258 { 1259 struct proc *p; 1260 1261 p = td ? td->td_proc : NULL; 1262 if (error) { 1263 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n", 1264 server, msg, error); 1265 } else { 1266 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg); 1267 } 1268 return (0); 1269 } 1270 1271 static void 1272 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1273 int error, int flags) 1274 { 1275 if (nmp == NULL) 1276 return; 1277 mtx_lock(&nmp->nm_mtx); 1278 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1279 nmp->nm_state |= NFSSTA_TIMEO; 1280 mtx_unlock(&nmp->nm_mtx); 1281 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1282 VQ_NOTRESP, 0); 1283 } else 1284 mtx_unlock(&nmp->nm_mtx); 1285 mtx_lock(&nmp->nm_mtx); 1286 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1287 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1288 mtx_unlock(&nmp->nm_mtx); 1289 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1290 VQ_NOTRESPLOCK, 0); 1291 } else 1292 mtx_unlock(&nmp->nm_mtx); 1293 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1294 } 1295 1296 static void 1297 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1298 int flags, int tprintfmsg) 1299 { 1300 if (nmp == NULL) 1301 return; 1302 if (tprintfmsg) { 1303 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1304 } 1305 1306 mtx_lock(&nmp->nm_mtx); 1307 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1308 nmp->nm_state &= ~NFSSTA_TIMEO; 1309 mtx_unlock(&nmp->nm_mtx); 1310 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1311 VQ_NOTRESP, 1); 1312 } else 1313 mtx_unlock(&nmp->nm_mtx); 1314 1315 mtx_lock(&nmp->nm_mtx); 1316 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1317 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1318 mtx_unlock(&nmp->nm_mtx); 1319 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1320 VQ_NOTRESPLOCK, 1); 1321 } else 1322 mtx_unlock(&nmp->nm_mtx); 1323 } 1324
Cache object: 324a8fa5cee84a2cd644b38e09f28f33
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