nfs_commonkrpc.c revision 317927
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: stable/10/sys/fs/nfs/nfs_commonkrpc.c 317927 2017-05-07 21:57:46Z 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 71dtrace_nfsclient_nfs23_start_probe_func_t 72 dtrace_nfscl_nfs234_start_probe; 73 74dtrace_nfsclient_nfs23_done_probe_func_t 75 dtrace_nfscl_nfs234_done_probe; 76 77/* 78 * Registered probes by RPC type. 79 */ 80uint32_t nfscl_nfs2_start_probes[NFSV41_NPROCS + 1]; 81uint32_t nfscl_nfs2_done_probes[NFSV41_NPROCS + 1]; 82 83uint32_t nfscl_nfs3_start_probes[NFSV41_NPROCS + 1]; 84uint32_t nfscl_nfs3_done_probes[NFSV41_NPROCS + 1]; 85 86uint32_t nfscl_nfs4_start_probes[NFSV41_NPROCS + 1]; 87uint32_t nfscl_nfs4_done_probes[NFSV41_NPROCS + 1]; 88#endif 89 90NFSSTATESPINLOCK; 91NFSREQSPINLOCK; 92NFSDLOCKMUTEX; 93NFSCLSTATEMUTEX; 94extern struct nfsstats newnfsstats; 95extern struct nfsreqhead nfsd_reqq; 96extern int nfscl_ticks; 97extern void (*ncl_call_invalcaches)(struct vnode *); 98extern int nfs_numnfscbd; 99extern int nfscl_debuglevel; 100 101SVCPOOL *nfscbd_pool; 102static int nfsrv_gsscallbackson = 0; 103static int nfs_bufpackets = 4; 104static int nfs_reconnects; 105static int nfs3_jukebox_delay = 10; 106static int nfs_skip_wcc_data_onerr = 1; 107 108SYSCTL_DECL(_vfs_nfs); 109 110SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, 111 "Buffer reservation size 2 < x < 64"); 112SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, 113 "Number of times the nfs client has had to reconnect"); 114SYSCTL_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"); 116SYSCTL_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 119static void nfs_down(struct nfsmount *, struct thread *, const char *, 120 int, int); 121static void nfs_up(struct nfsmount *, struct thread *, const char *, 122 int, int); 123static int nfs_msg(struct thread *, const char *, const char *, int); 124 125struct 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 131static 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 */ 160int 161newnfs_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; 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 /* 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 pktscale--; 234 if (nrp->nr_sotype == SOCK_DGRAM) { 235 if (nmp != NULL) { 236 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 237 pktscale; 238 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 239 pktscale; 240 } else { 241 sndreserve = rcvreserve = 1024 * pktscale; 242 } 243 } else { 244 if (nrp->nr_sotype != SOCK_STREAM) 245 panic("nfscon sotype"); 246 if (nmp != NULL) { 247 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 248 sizeof (u_int32_t)) * pktscale; 249 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 250 sizeof (u_int32_t)) * pktscale; 251 } else { 252 sndreserve = rcvreserve = 1024 * pktscale; 253 } 254 } 255 error = soreserve(so, sndreserve, rcvreserve); 256 } while (error != 0 && pktscale > 2); 257 soclose(so); 258 if (error) { 259 td->td_ucred = origcred; 260 goto out; 261 } 262 263 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 264 nrp->nr_vers, sndreserve, rcvreserve); 265 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq"); 266 if (nmp != NULL) { 267 if ((nmp->nm_flag & NFSMNT_INT)) 268 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 269 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 270 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 271 if (NFSHASSOFT(nmp)) { 272 if (nmp->nm_sotype == SOCK_DGRAM) 273 /* 274 * For UDP, the large timeout for a reconnect 275 * will be set to "nm_retry * nm_timeo / 2", so 276 * we only want to do 2 reconnect timeout 277 * retries. 278 */ 279 retries = 2; 280 else 281 retries = nmp->nm_retry; 282 } else 283 retries = INT_MAX; 284 /* cred == NULL for DS connects. */ 285 if (NFSHASNFSV4N(nmp) && cred != NULL) { 286 /* 287 * Make sure the nfscbd_pool doesn't get destroyed 288 * while doing this. 289 */ 290 NFSD_LOCK(); 291 if (nfs_numnfscbd > 0) { 292 nfs_numnfscbd++; 293 NFSD_UNLOCK(); 294 xprt = svc_vc_create_backchannel(nfscbd_pool); 295 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt); 296 NFSD_LOCK(); 297 nfs_numnfscbd--; 298 if (nfs_numnfscbd == 0) 299 wakeup(&nfs_numnfscbd); 300 } 301 NFSD_UNLOCK(); 302 } 303 } else { 304 /* 305 * Three cases: 306 * - Null RPC callback to client 307 * - Non-Null RPC callback to client, wait a little longer 308 * - upcalls to nfsuserd and gssd (clp == NULL) 309 */ 310 if (callback_retry_mult == 0) { 311 retries = NFSV4_UPCALLRETRY; 312 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 313 } else { 314 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 315 } 316 } 317 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 318 319 if (nmp != NULL) { 320 /* 321 * For UDP, there are 2 timeouts: 322 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer 323 * that does a retransmit of an RPC request using the same 324 * socket and xid. This is what you normally want to do, 325 * since NFS servers depend on "same xid" for their 326 * Duplicate Request Cache. 327 * - timeout specified in CLNT_CALL_MBUF(), which specifies when 328 * retransmits on the same socket should fail and a fresh 329 * socket created. Each of these timeouts counts as one 330 * CLSET_RETRIES as set above. 331 * Set the initial retransmit timeout for UDP. This timeout 332 * doesn't exist for TCP and the following call just fails, 333 * which is ok. 334 */ 335 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 336 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ; 337 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo); 338 } 339 340 mtx_lock(&nrp->nr_mtx); 341 if (nrp->nr_client != NULL) { 342 mtx_unlock(&nrp->nr_mtx); 343 /* 344 * Someone else already connected. 345 */ 346 CLNT_RELEASE(client); 347 } else { 348 nrp->nr_client = client; 349 /* 350 * Protocols that do not require connections may be optionally 351 * left unconnected for servers that reply from a port other 352 * than NFS_PORT. 353 */ 354 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 355 mtx_unlock(&nrp->nr_mtx); 356 CLNT_CONTROL(client, CLSET_CONNECT, &one); 357 } else 358 mtx_unlock(&nrp->nr_mtx); 359 } 360 361 362 /* Restore current thread's credentials. */ 363 td->td_ucred = origcred; 364 365out: 366 NFSEXITCODE(error); 367 return (error); 368} 369 370/* 371 * NFS disconnect. Clean up and unlink. 372 */ 373void 374newnfs_disconnect(struct nfssockreq *nrp) 375{ 376 CLIENT *client; 377 378 mtx_lock(&nrp->nr_mtx); 379 if (nrp->nr_client != NULL) { 380 client = nrp->nr_client; 381 nrp->nr_client = NULL; 382 mtx_unlock(&nrp->nr_mtx); 383 rpc_gss_secpurge_call(client); 384 CLNT_CLOSE(client); 385 CLNT_RELEASE(client); 386 } else { 387 mtx_unlock(&nrp->nr_mtx); 388 } 389} 390 391static AUTH * 392nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 393 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 394{ 395 rpc_gss_service_t svc; 396 AUTH *auth; 397 398 switch (secflavour) { 399 case RPCSEC_GSS_KRB5: 400 case RPCSEC_GSS_KRB5I: 401 case RPCSEC_GSS_KRB5P: 402 if (!mech_oid) { 403 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 404 return (NULL); 405 } 406 if (secflavour == RPCSEC_GSS_KRB5) 407 svc = rpc_gss_svc_none; 408 else if (secflavour == RPCSEC_GSS_KRB5I) 409 svc = rpc_gss_svc_integrity; 410 else 411 svc = rpc_gss_svc_privacy; 412 413 if (clnt_principal == NULL) 414 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 415 srv_principal, mech_oid, svc); 416 else { 417 auth = rpc_gss_seccreate_call(nrp->nr_client, cred, 418 clnt_principal, srv_principal, "kerberosv5", 419 svc, NULL, NULL, NULL); 420 return (auth); 421 } 422 if (auth != NULL) 423 return (auth); 424 /* fallthrough */ 425 case AUTH_SYS: 426 default: 427 return (authunix_create(cred)); 428 429 } 430} 431 432/* 433 * Callback from the RPC code to generate up/down notifications. 434 */ 435 436struct nfs_feedback_arg { 437 struct nfsmount *nf_mount; 438 int nf_lastmsg; /* last tprintf */ 439 int nf_tprintfmsg; 440 struct thread *nf_td; 441}; 442 443static void 444nfs_feedback(int type, int proc, void *arg) 445{ 446 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 447 struct nfsmount *nmp = nf->nf_mount; 448 time_t now; 449 450 switch (type) { 451 case FEEDBACK_REXMIT2: 452 case FEEDBACK_RECONNECT: 453 now = NFSD_MONOSEC; 454 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) { 455 nfs_down(nmp, nf->nf_td, 456 "not responding", 0, NFSSTA_TIMEO); 457 nf->nf_tprintfmsg = TRUE; 458 nf->nf_lastmsg = now; 459 } 460 break; 461 462 case FEEDBACK_OK: 463 nfs_up(nf->nf_mount, nf->nf_td, 464 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 465 break; 466 } 467} 468 469/* 470 * newnfs_request - goes something like this 471 * - does the rpc by calling the krpc layer 472 * - break down rpc header and return with nfs reply 473 * nb: always frees up nd_mreq mbuf list 474 */ 475int 476newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 477 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 478 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 479 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *dssep) 480{ 481 uint32_t retseq, retval, slotseq, *tl; 482 time_t waituntil; 483 int i = 0, j = 0, opcnt, set_sigset = 0, slot; 484 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS; 485 int freeslot, maxslot, reterr, slotpos, timeo; 486 u_int16_t procnum; 487 u_int trylater_delay = 1; 488 struct nfs_feedback_arg nf; 489 struct timeval timo; 490 AUTH *auth; 491 struct rpc_callextra ext; 492 enum clnt_stat stat; 493 struct nfsreq *rep = NULL; 494 char *srv_principal = NULL, *clnt_principal = NULL; 495 sigset_t oldset; 496 struct ucred *authcred; 497 struct nfsclsession *sep; 498 uint8_t sessionid[NFSX_V4SESSIONID]; 499 500 sep = dssep; 501 if (xidp != NULL) 502 *xidp = 0; 503 /* Reject requests while attempting a forced unmount. */ 504 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) { 505 m_freem(nd->nd_mreq); 506 return (ESTALE); 507 } 508 509 /* 510 * Set authcred, which is used to acquire RPC credentials to 511 * the cred argument, by default. The crhold() should not be 512 * necessary, but will ensure that some future code change 513 * doesn't result in the credential being free'd prematurely. 514 */ 515 authcred = crhold(cred); 516 517 /* For client side interruptible mounts, mask off the signals. */ 518 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 519 newnfs_set_sigmask(td, &oldset); 520 set_sigset = 1; 521 } 522 523 /* 524 * XXX if not already connected call nfs_connect now. Longer 525 * term, change nfs_mount to call nfs_connect unconditionally 526 * and let clnt_reconnect_create handle reconnects. 527 */ 528 if (nrp->nr_client == NULL) 529 newnfs_connect(nmp, nrp, cred, td, 0); 530 531 /* 532 * For a client side mount, nmp is != NULL and clp == NULL. For 533 * server calls (callbacks or upcalls), nmp == NULL. 534 */ 535 if (clp != NULL) { 536 NFSLOCKSTATE(); 537 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 538 secflavour = RPCSEC_GSS_KRB5; 539 if (nd->nd_procnum != NFSPROC_NULL) { 540 if (clp->lc_flags & LCL_GSSINTEGRITY) 541 secflavour = RPCSEC_GSS_KRB5I; 542 else if (clp->lc_flags & LCL_GSSPRIVACY) 543 secflavour = RPCSEC_GSS_KRB5P; 544 } 545 } 546 NFSUNLOCKSTATE(); 547 } else if (nmp != NULL && NFSHASKERB(nmp) && 548 nd->nd_procnum != NFSPROC_NULL) { 549 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 550 nd->nd_flag |= ND_USEGSSNAME; 551 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 552 /* 553 * If there is a client side host based credential, 554 * use that, otherwise use the system uid, if set. 555 * The system uid is in the nmp->nm_sockreq.nr_cred 556 * credentials. 557 */ 558 if (nmp->nm_krbnamelen > 0) { 559 usegssname = 1; 560 clnt_principal = nmp->nm_krbname; 561 } else if (nmp->nm_uid != (uid_t)-1) { 562 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 563 ("newnfs_request: NULL nr_cred")); 564 crfree(authcred); 565 authcred = crhold(nmp->nm_sockreq.nr_cred); 566 } 567 } else if (nmp->nm_krbnamelen == 0 && 568 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 569 /* 570 * If there is no host based principal name and 571 * the system uid is set and this is root, use the 572 * system uid, since root won't have user 573 * credentials in a credentials cache file. 574 * The system uid is in the nmp->nm_sockreq.nr_cred 575 * credentials. 576 */ 577 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 578 ("newnfs_request: NULL nr_cred")); 579 crfree(authcred); 580 authcred = crhold(nmp->nm_sockreq.nr_cred); 581 } 582 if (NFSHASINTEGRITY(nmp)) 583 secflavour = RPCSEC_GSS_KRB5I; 584 else if (NFSHASPRIVACY(nmp)) 585 secflavour = RPCSEC_GSS_KRB5P; 586 else 587 secflavour = RPCSEC_GSS_KRB5; 588 srv_principal = NFSMNT_SRVKRBNAME(nmp); 589 } else if (nmp != NULL && !NFSHASKERB(nmp) && 590 nd->nd_procnum != NFSPROC_NULL && 591 (nd->nd_flag & ND_USEGSSNAME) != 0) { 592 /* 593 * Use the uid that did the mount when the RPC is doing 594 * NFSv4 system operations, as indicated by the 595 * ND_USEGSSNAME flag, for the AUTH_SYS case. 596 * The credentials in nm_sockreq.nr_cred were used for the 597 * mount. 598 */ 599 KASSERT(nmp->nm_sockreq.nr_cred != NULL, 600 ("newnfs_request: NULL nr_cred")); 601 crfree(authcred); 602 authcred = crhold(nmp->nm_sockreq.nr_cred); 603 } 604 605 if (nmp != NULL) { 606 bzero(&nf, sizeof(struct nfs_feedback_arg)); 607 nf.nf_mount = nmp; 608 nf.nf_td = td; 609 nf.nf_lastmsg = NFSD_MONOSEC - 610 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 611 } 612 613 if (nd->nd_procnum == NFSPROC_NULL) 614 auth = authnone_create(); 615 else if (usegssname) { 616 /* 617 * For this case, the authenticator is held in the 618 * nfssockreq structure, so don't release the reference count 619 * held on it. --> Don't AUTH_DESTROY() it in this function. 620 */ 621 if (nrp->nr_auth == NULL) 622 nrp->nr_auth = nfs_getauth(nrp, secflavour, 623 clnt_principal, srv_principal, NULL, authcred); 624 else 625 rpc_gss_refresh_auth_call(nrp->nr_auth); 626 auth = nrp->nr_auth; 627 } else 628 auth = nfs_getauth(nrp, secflavour, NULL, 629 srv_principal, NULL, authcred); 630 crfree(authcred); 631 if (auth == NULL) { 632 m_freem(nd->nd_mreq); 633 if (set_sigset) 634 newnfs_restore_sigmask(td, &oldset); 635 return (EACCES); 636 } 637 bzero(&ext, sizeof(ext)); 638 ext.rc_auth = auth; 639 if (nmp != NULL) { 640 ext.rc_feedback = nfs_feedback; 641 ext.rc_feedback_arg = &nf; 642 } 643 644 procnum = nd->nd_procnum; 645 if ((nd->nd_flag & ND_NFSV4) && 646 nd->nd_procnum != NFSPROC_NULL && 647 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 648 procnum = NFSV4PROC_COMPOUND; 649 650 if (nmp != NULL) { 651 NFSINCRGLOBAL(newnfsstats.rpcrequests); 652 653 /* Map the procnum to the old NFSv2 one, as required. */ 654 if ((nd->nd_flag & ND_NFSV2) != 0) { 655 if (nd->nd_procnum < NFS_V3NPROCS) 656 procnum = nfsv2_procid[nd->nd_procnum]; 657 else 658 procnum = NFSV2PROC_NOOP; 659 } 660 661 /* 662 * Now only used for the R_DONTRECOVER case, but until that is 663 * supported within the krpc code, I need to keep a queue of 664 * outstanding RPCs for nfsv4 client requests. 665 */ 666 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 667 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), 668 M_NFSDREQ, M_WAITOK); 669#ifdef KDTRACE_HOOKS 670 if (dtrace_nfscl_nfs234_start_probe != NULL) { 671 uint32_t probe_id; 672 int probe_procnum; 673 674 if (nd->nd_flag & ND_NFSV4) { 675 probe_id = 676 nfscl_nfs4_start_probes[nd->nd_procnum]; 677 probe_procnum = nd->nd_procnum; 678 } else if (nd->nd_flag & ND_NFSV3) { 679 probe_id = nfscl_nfs3_start_probes[procnum]; 680 probe_procnum = procnum; 681 } else { 682 probe_id = 683 nfscl_nfs2_start_probes[nd->nd_procnum]; 684 probe_procnum = procnum; 685 } 686 if (probe_id != 0) 687 (dtrace_nfscl_nfs234_start_probe) 688 (probe_id, vp, nd->nd_mreq, cred, 689 probe_procnum); 690 } 691#endif 692 } 693 trycnt = 0; 694 freeslot = -1; /* Set to slot that needs to be free'd */ 695tryagain: 696 slot = -1; /* Slot that needs a sequence# increment. */ 697 /* 698 * This timeout specifies when a new socket should be created, 699 * along with new xid values. For UDP, this should be done 700 * infrequently, since retransmits of RPC requests should normally 701 * use the same xid. 702 */ 703 if (nmp == NULL) { 704 timo.tv_usec = 0; 705 if (clp == NULL) 706 timo.tv_sec = NFSV4_UPCALLTIMEO; 707 else 708 timo.tv_sec = NFSV4_CALLBACKTIMEO; 709 } else { 710 if (nrp->nr_sotype != SOCK_DGRAM) { 711 timo.tv_usec = 0; 712 if ((nmp->nm_flag & NFSMNT_NFSV4)) 713 timo.tv_sec = INT_MAX; 714 else 715 timo.tv_sec = NFS_TCPTIMEO; 716 } else { 717 if (NFSHASSOFT(nmp)) { 718 /* 719 * CLSET_RETRIES is set to 2, so this should be 720 * half of the total timeout required. 721 */ 722 timeo = nmp->nm_retry * nmp->nm_timeo / 2; 723 if (timeo < 1) 724 timeo = 1; 725 timo.tv_sec = timeo / NFS_HZ; 726 timo.tv_usec = (timeo % NFS_HZ) * 1000000 / 727 NFS_HZ; 728 } else { 729 /* For UDP hard mounts, use a large value. */ 730 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ; 731 timo.tv_usec = 0; 732 } 733 } 734 735 if (rep != NULL) { 736 rep->r_flags = 0; 737 rep->r_nmp = nmp; 738 /* 739 * Chain request into list of outstanding requests. 740 */ 741 NFSLOCKREQ(); 742 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 743 NFSUNLOCKREQ(); 744 } 745 } 746 747 nd->nd_mrep = NULL; 748 if (clp != NULL && sep != NULL) 749 stat = clnt_bck_call(nrp->nr_client, &ext, procnum, 750 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt); 751 else 752 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, 753 nd->nd_mreq, &nd->nd_mrep, timo); 754 755 if (rep != NULL) { 756 /* 757 * RPC done, unlink the request. 758 */ 759 NFSLOCKREQ(); 760 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 761 NFSUNLOCKREQ(); 762 } 763 764 /* 765 * If there was a successful reply and a tprintf msg. 766 * tprintf a response. 767 */ 768 if (stat == RPC_SUCCESS) { 769 error = 0; 770 } else if (stat == RPC_TIMEDOUT) { 771 NFSINCRGLOBAL(newnfsstats.rpctimeouts); 772 error = ETIMEDOUT; 773 } else if (stat == RPC_VERSMISMATCH) { 774 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 775 error = EOPNOTSUPP; 776 } else if (stat == RPC_PROGVERSMISMATCH) { 777 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 778 error = EPROTONOSUPPORT; 779 } else if (stat == RPC_INTR) { 780 error = EINTR; 781 } else { 782 NFSINCRGLOBAL(newnfsstats.rpcinvalid); 783 error = EACCES; 784 } 785 if (error) { 786 m_freem(nd->nd_mreq); 787 if (usegssname == 0) 788 AUTH_DESTROY(auth); 789 if (rep != NULL) 790 FREE((caddr_t)rep, M_NFSDREQ); 791 if (set_sigset) 792 newnfs_restore_sigmask(td, &oldset); 793 return (error); 794 } 795 796 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 797 798 /* 799 * Search for any mbufs that are not a multiple of 4 bytes long 800 * or with m_data not longword aligned. 801 * These could cause pointer alignment problems, so copy them to 802 * well aligned mbufs. 803 */ 804 newnfs_realign(&nd->nd_mrep, M_WAITOK); 805 nd->nd_md = nd->nd_mrep; 806 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 807 nd->nd_repstat = 0; 808 if (nd->nd_procnum != NFSPROC_NULL && 809 nd->nd_procnum != NFSV4PROC_CBNULL) { 810 /* If sep == NULL, set it to the default in nmp. */ 811 if (sep == NULL && nmp != NULL) 812 sep = nfsmnt_mdssession(nmp); 813 /* 814 * and now the actual NFS xdr. 815 */ 816 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 817 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 818 if (nd->nd_repstat >= 10000) 819 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum, 820 (int)nd->nd_repstat); 821 822 /* 823 * Get rid of the tag, return count and SEQUENCE result for 824 * NFSv4. 825 */ 826 if ((nd->nd_flag & ND_NFSV4) != 0) { 827 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 828 i = fxdr_unsigned(int, *tl); 829 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 830 if (error) 831 goto nfsmout; 832 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 833 opcnt = fxdr_unsigned(int, *tl++); 834 i = fxdr_unsigned(int, *tl++); 835 j = fxdr_unsigned(int, *tl); 836 if (j >= 10000) 837 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j); 838 /* 839 * If the first op is Sequence, free up the slot. 840 */ 841 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) || 842 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0)) 843 NFSCL_DEBUG(1, "failed seq=%d\n", j); 844 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) || 845 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0) 846 ) { 847 if (i == NFSV4OP_SEQUENCE) 848 NFSM_DISSECT(tl, uint32_t *, 849 NFSX_V4SESSIONID + 850 5 * NFSX_UNSIGNED); 851 else 852 NFSM_DISSECT(tl, uint32_t *, 853 NFSX_V4SESSIONID + 854 4 * NFSX_UNSIGNED); 855 mtx_lock(&sep->nfsess_mtx); 856 if (bcmp(tl, sep->nfsess_sessionid, 857 NFSX_V4SESSIONID) == 0) { 858 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 859 retseq = fxdr_unsigned(uint32_t, *tl++); 860 slot = fxdr_unsigned(int, *tl++); 861 freeslot = slot; 862 if (retseq != sep->nfsess_slotseq[slot]) 863 printf("retseq diff 0x%x\n", 864 retseq); 865 retval = fxdr_unsigned(uint32_t, *++tl); 866 if ((retval + 1) < sep->nfsess_foreslots 867 ) 868 sep->nfsess_foreslots = (retval 869 + 1); 870 else if ((retval + 1) > 871 sep->nfsess_foreslots) 872 sep->nfsess_foreslots = (retval 873 < 64) ? (retval + 1) : 64; 874 } 875 mtx_unlock(&sep->nfsess_mtx); 876 877 /* Grab the op and status for the next one. */ 878 if (opcnt > 1) { 879 NFSM_DISSECT(tl, uint32_t *, 880 2 * NFSX_UNSIGNED); 881 i = fxdr_unsigned(int, *tl++); 882 j = fxdr_unsigned(int, *tl); 883 } 884 } 885 } 886 if (nd->nd_repstat != 0) { 887 if (nd->nd_repstat == NFSERR_BADSESSION && 888 nmp != NULL && dssep == NULL) { 889 /* 890 * If this is a client side MDS RPC, mark 891 * the MDS session defunct and initiate 892 * recovery, as required. 893 * The nfsess_defunct field is protected by 894 * the NFSLOCKMNT()/nm_mtx lock and not the 895 * nfsess_mtx lock to simplify its handling, 896 * for the MDS session. This lock is also 897 * sufficient for nfsess_sessionid, since it 898 * never changes in the structure. 899 */ 900 NFSCL_DEBUG(1, "Got badsession\n"); 901 NFSLOCKCLSTATE(); 902 NFSLOCKMNT(nmp); 903 sep = NFSMNT_MDSSESSION(nmp); 904 if (bcmp(sep->nfsess_sessionid, nd->nd_sequence, 905 NFSX_V4SESSIONID) == 0) { 906 /* Initiate recovery. */ 907 sep->nfsess_defunct = 1; 908 NFSCL_DEBUG(1, "Marked defunct\n"); 909 if (nmp->nm_clp != NULL) { 910 nmp->nm_clp->nfsc_flags |= 911 NFSCLFLAGS_RECOVER; 912 wakeup(nmp->nm_clp); 913 } 914 } 915 NFSUNLOCKCLSTATE(); 916 /* 917 * Sleep for up to 1sec waiting for a new 918 * session. 919 */ 920 mtx_sleep(&nmp->nm_sess, &nmp->nm_mtx, PZERO, 921 "nfsbadsess", hz); 922 /* 923 * Get the session again, in case a new one 924 * has been created during the sleep. 925 */ 926 sep = NFSMNT_MDSSESSION(nmp); 927 NFSUNLOCKMNT(nmp); 928 if ((nd->nd_flag & ND_LOOPBADSESS) != 0) { 929 reterr = nfsv4_sequencelookup(nmp, sep, 930 &slotpos, &maxslot, &slotseq, 931 sessionid); 932 if (reterr == 0) { 933 /* Fill in new session info. */ 934 NFSCL_DEBUG(1, 935 "Filling in new sequence\n"); 936 tl = nd->nd_sequence; 937 bcopy(sessionid, tl, 938 NFSX_V4SESSIONID); 939 tl += NFSX_V4SESSIONID / 940 NFSX_UNSIGNED; 941 *tl++ = txdr_unsigned(slotseq); 942 *tl++ = txdr_unsigned(slotpos); 943 *tl = txdr_unsigned(maxslot); 944 } 945 if (reterr == NFSERR_BADSESSION || 946 reterr == 0) { 947 NFSCL_DEBUG(1, 948 "Badsession looping\n"); 949 m_freem(nd->nd_mrep); 950 nd->nd_mrep = NULL; 951 goto tryagain; 952 } 953 nd->nd_repstat = reterr; 954 NFSCL_DEBUG(1, "Got err=%d\n", reterr); 955 } 956 } 957 if (((nd->nd_repstat == NFSERR_DELAY || 958 nd->nd_repstat == NFSERR_GRACE) && 959 (nd->nd_flag & ND_NFSV4) && 960 nd->nd_procnum != NFSPROC_DELEGRETURN && 961 nd->nd_procnum != NFSPROC_SETATTR && 962 nd->nd_procnum != NFSPROC_READ && 963 nd->nd_procnum != NFSPROC_READDS && 964 nd->nd_procnum != NFSPROC_WRITE && 965 nd->nd_procnum != NFSPROC_WRITEDS && 966 nd->nd_procnum != NFSPROC_OPEN && 967 nd->nd_procnum != NFSPROC_CREATE && 968 nd->nd_procnum != NFSPROC_OPENCONFIRM && 969 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 970 nd->nd_procnum != NFSPROC_CLOSE && 971 nd->nd_procnum != NFSPROC_LOCK && 972 nd->nd_procnum != NFSPROC_LOCKU) || 973 (nd->nd_repstat == NFSERR_DELAY && 974 (nd->nd_flag & ND_NFSV4) == 0) || 975 nd->nd_repstat == NFSERR_RESOURCE) { 976 if (trylater_delay > NFS_TRYLATERDEL) 977 trylater_delay = NFS_TRYLATERDEL; 978 waituntil = NFSD_MONOSEC + trylater_delay; 979 while (NFSD_MONOSEC < waituntil) 980 (void) nfs_catnap(PZERO, 0, "nfstry"); 981 trylater_delay *= 2; 982 if (slot != -1) { 983 mtx_lock(&sep->nfsess_mtx); 984 sep->nfsess_slotseq[slot]++; 985 *nd->nd_slotseq = txdr_unsigned( 986 sep->nfsess_slotseq[slot]); 987 mtx_unlock(&sep->nfsess_mtx); 988 } 989 m_freem(nd->nd_mrep); 990 nd->nd_mrep = NULL; 991 goto tryagain; 992 } 993 994 /* 995 * If the File Handle was stale, invalidate the 996 * lookup cache, just in case. 997 * (vp != NULL implies a client side call) 998 */ 999 if (nd->nd_repstat == ESTALE && vp != NULL) { 1000 cache_purge(vp); 1001 if (ncl_call_invalcaches != NULL) 1002 (*ncl_call_invalcaches)(vp); 1003 } 1004 } 1005 if ((nd->nd_flag & ND_NFSV4) != 0) { 1006 /* Free the slot, as required. */ 1007 if (freeslot != -1) 1008 nfsv4_freeslot(sep, freeslot); 1009 /* 1010 * If this op is Putfh, throw its results away. 1011 */ 1012 if (j >= 10000) 1013 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j); 1014 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) { 1015 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 1016 i = fxdr_unsigned(int, *tl++); 1017 j = fxdr_unsigned(int, *tl); 1018 if (j >= 10000) 1019 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i, 1020 j); 1021 /* 1022 * All Compounds that do an Op that must 1023 * be in sequence consist of NFSV4OP_PUTFH 1024 * followed by one of these. As such, we 1025 * can determine if the seqid# should be 1026 * incremented, here. 1027 */ 1028 if ((i == NFSV4OP_OPEN || 1029 i == NFSV4OP_OPENCONFIRM || 1030 i == NFSV4OP_OPENDOWNGRADE || 1031 i == NFSV4OP_CLOSE || 1032 i == NFSV4OP_LOCK || 1033 i == NFSV4OP_LOCKU) && 1034 (j == 0 || 1035 (j != NFSERR_STALECLIENTID && 1036 j != NFSERR_STALESTATEID && 1037 j != NFSERR_BADSTATEID && 1038 j != NFSERR_BADSEQID && 1039 j != NFSERR_BADXDR && 1040 j != NFSERR_RESOURCE && 1041 j != NFSERR_NOFILEHANDLE))) 1042 nd->nd_flag |= ND_INCRSEQID; 1043 } 1044 /* 1045 * If this op's status is non-zero, mark 1046 * that there is no more data to process. 1047 */ 1048 if (j) 1049 nd->nd_flag |= ND_NOMOREDATA; 1050 1051 /* 1052 * If R_DONTRECOVER is set, replace the stale error 1053 * reply, so that recovery isn't initiated. 1054 */ 1055 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 1056 nd->nd_repstat == NFSERR_BADSESSION || 1057 nd->nd_repstat == NFSERR_STALESTATEID) && 1058 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 1059 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 1060 } 1061 } 1062 1063#ifdef KDTRACE_HOOKS 1064 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 1065 uint32_t probe_id; 1066 int probe_procnum; 1067 1068 if (nd->nd_flag & ND_NFSV4) { 1069 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 1070 probe_procnum = nd->nd_procnum; 1071 } else if (nd->nd_flag & ND_NFSV3) { 1072 probe_id = nfscl_nfs3_done_probes[procnum]; 1073 probe_procnum = procnum; 1074 } else { 1075 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 1076 probe_procnum = procnum; 1077 } 1078 if (probe_id != 0) 1079 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 1080 nd->nd_mreq, cred, probe_procnum, 0); 1081 } 1082#endif 1083 1084 m_freem(nd->nd_mreq); 1085 if (usegssname == 0) 1086 AUTH_DESTROY(auth); 1087 if (rep != NULL) 1088 FREE((caddr_t)rep, M_NFSDREQ); 1089 if (set_sigset) 1090 newnfs_restore_sigmask(td, &oldset); 1091 return (0); 1092nfsmout: 1093 mbuf_freem(nd->nd_mrep); 1094 mbuf_freem(nd->nd_mreq); 1095 if (usegssname == 0) 1096 AUTH_DESTROY(auth); 1097 if (rep != NULL) 1098 FREE((caddr_t)rep, M_NFSDREQ); 1099 if (set_sigset) 1100 newnfs_restore_sigmask(td, &oldset); 1101 return (error); 1102} 1103 1104/* 1105 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 1106 * wait for all requests to complete. This is used by forced unmounts 1107 * to terminate any outstanding RPCs. 1108 */ 1109int 1110newnfs_nmcancelreqs(struct nfsmount *nmp) 1111{ 1112 1113 if (nmp->nm_sockreq.nr_client != NULL) 1114 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 1115 return (0); 1116} 1117 1118/* 1119 * Any signal that can interrupt an NFS operation in an intr mount 1120 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 1121 */ 1122int newnfs_sig_set[] = { 1123 SIGINT, 1124 SIGTERM, 1125 SIGHUP, 1126 SIGKILL, 1127 SIGQUIT 1128}; 1129 1130/* 1131 * Check to see if one of the signals in our subset is pending on 1132 * the process (in an intr mount). 1133 */ 1134static int 1135nfs_sig_pending(sigset_t set) 1136{ 1137 int i; 1138 1139 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) 1140 if (SIGISMEMBER(set, newnfs_sig_set[i])) 1141 return (1); 1142 return (0); 1143} 1144 1145/* 1146 * The set/restore sigmask functions are used to (temporarily) overwrite 1147 * the thread td_sigmask during an RPC call (for example). These are also 1148 * used in other places in the NFS client that might tsleep(). 1149 */ 1150void 1151newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 1152{ 1153 sigset_t newset; 1154 int i; 1155 struct proc *p; 1156 1157 SIGFILLSET(newset); 1158 if (td == NULL) 1159 td = curthread; /* XXX */ 1160 p = td->td_proc; 1161 /* Remove the NFS set of signals from newset */ 1162 PROC_LOCK(p); 1163 mtx_lock(&p->p_sigacts->ps_mtx); 1164 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) { 1165 /* 1166 * But make sure we leave the ones already masked 1167 * by the process, ie. remove the signal from the 1168 * temporary signalmask only if it wasn't already 1169 * in p_sigmask. 1170 */ 1171 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 1172 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 1173 SIGDELSET(newset, newnfs_sig_set[i]); 1174 } 1175 mtx_unlock(&p->p_sigacts->ps_mtx); 1176 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 1177 SIGPROCMASK_PROC_LOCKED); 1178 PROC_UNLOCK(p); 1179} 1180 1181void 1182newnfs_restore_sigmask(struct thread *td, sigset_t *set) 1183{ 1184 if (td == NULL) 1185 td = curthread; /* XXX */ 1186 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 1187} 1188 1189/* 1190 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 1191 * old one after msleep() returns. 1192 */ 1193int 1194newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 1195{ 1196 sigset_t oldset; 1197 int error; 1198 struct proc *p; 1199 1200 if ((priority & PCATCH) == 0) 1201 return msleep(ident, mtx, priority, wmesg, timo); 1202 if (td == NULL) 1203 td = curthread; /* XXX */ 1204 newnfs_set_sigmask(td, &oldset); 1205 error = msleep(ident, mtx, priority, wmesg, timo); 1206 newnfs_restore_sigmask(td, &oldset); 1207 p = td->td_proc; 1208 return (error); 1209} 1210 1211/* 1212 * Test for a termination condition pending on the process. 1213 * This is used for NFSMNT_INT mounts. 1214 */ 1215int 1216newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 1217{ 1218 struct proc *p; 1219 sigset_t tmpset; 1220 1221 /* Terminate all requests while attempting a forced unmount. */ 1222 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) 1223 return (EIO); 1224 if (!(nmp->nm_flag & NFSMNT_INT)) 1225 return (0); 1226 if (td == NULL) 1227 return (0); 1228 p = td->td_proc; 1229 PROC_LOCK(p); 1230 tmpset = p->p_siglist; 1231 SIGSETOR(tmpset, td->td_siglist); 1232 SIGSETNAND(tmpset, td->td_sigmask); 1233 mtx_lock(&p->p_sigacts->ps_mtx); 1234 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 1235 mtx_unlock(&p->p_sigacts->ps_mtx); 1236 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 1237 && nfs_sig_pending(tmpset)) { 1238 PROC_UNLOCK(p); 1239 return (EINTR); 1240 } 1241 PROC_UNLOCK(p); 1242 return (0); 1243} 1244 1245static int 1246nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1247{ 1248 struct proc *p; 1249 1250 p = td ? td->td_proc : NULL; 1251 if (error) { 1252 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n", 1253 server, msg, error); 1254 } else { 1255 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg); 1256 } 1257 return (0); 1258} 1259 1260static void 1261nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1262 int error, int flags) 1263{ 1264 if (nmp == NULL) 1265 return; 1266 mtx_lock(&nmp->nm_mtx); 1267 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1268 nmp->nm_state |= NFSSTA_TIMEO; 1269 mtx_unlock(&nmp->nm_mtx); 1270 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1271 VQ_NOTRESP, 0); 1272 } else 1273 mtx_unlock(&nmp->nm_mtx); 1274 mtx_lock(&nmp->nm_mtx); 1275 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1276 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1277 mtx_unlock(&nmp->nm_mtx); 1278 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1279 VQ_NOTRESPLOCK, 0); 1280 } else 1281 mtx_unlock(&nmp->nm_mtx); 1282 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1283} 1284 1285static void 1286nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1287 int flags, int tprintfmsg) 1288{ 1289 if (nmp == NULL) 1290 return; 1291 if (tprintfmsg) { 1292 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1293 } 1294 1295 mtx_lock(&nmp->nm_mtx); 1296 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1297 nmp->nm_state &= ~NFSSTA_TIMEO; 1298 mtx_unlock(&nmp->nm_mtx); 1299 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1300 VQ_NOTRESP, 1); 1301 } else 1302 mtx_unlock(&nmp->nm_mtx); 1303 1304 mtx_lock(&nmp->nm_mtx); 1305 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1306 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1307 mtx_unlock(&nmp->nm_mtx); 1308 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1309 VQ_NOTRESPLOCK, 1); 1310 } else 1311 mtx_unlock(&nmp->nm_mtx); 1312} 1313 1314