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_inet6.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 63 #include <kgssapi/krb5/kcrypto.h> 64 65 #include <fs/nfs/nfsport.h> 66 67 NFSSTATESPINLOCK; 68 NFSREQSPINLOCK; 69 extern struct nfsstats newnfsstats; 70 extern struct nfsreqhead nfsd_reqq; 71 extern int nfscl_ticks; 72 extern void (*ncl_call_invalcaches)(struct vnode *); 73 74 static int nfsrv_gsscallbackson = 0; 75 static int nfs_bufpackets = 4; 76 static int nfs_reconnects; 77 static int nfs3_jukebox_delay = 10; 78 static int nfs_skip_wcc_data_onerr = 1; 79 static int nfs_keytab_enctype = ETYPE_DES_CBC_CRC; 80 81 SYSCTL_DECL(_vfs_newnfs); 82 83 SYSCTL_INT(_vfs_newnfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, 84 "Buffer reservation size 2 < x < 64"); 85 SYSCTL_INT(_vfs_newnfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, 86 "Number of times the nfs client has had to reconnect"); 87 SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0, 88 "Number of seconds to delay a retry after receiving EJUKEBOX"); 89 SYSCTL_INT(_vfs_newnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0, 90 "Disable weak cache consistency checking when server returns an error"); 91 SYSCTL_INT(_vfs_newnfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0, 92 "Encryption type for the keytab entry used by nfs"); 93 94 static void nfs_down(struct nfsmount *, struct thread *, const char *, 95 int, int); 96 static void nfs_up(struct nfsmount *, struct thread *, const char *, 97 int, int); 98 static int nfs_msg(struct thread *, const char *, const char *, int); 99 100 extern int nfsv2_procid[]; 101 102 struct nfs_cached_auth { 103 int ca_refs; /* refcount, including 1 from the cache */ 104 uid_t ca_uid; /* uid that corresponds to this auth */ 105 AUTH *ca_auth; /* RPC auth handle */ 106 }; 107 108 /* 109 * Initialize sockets and congestion for a new NFS connection. 110 * We do not free the sockaddr if error. 111 */ 112 int 113 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp, 114 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult) 115 { 116 int rcvreserve, sndreserve; 117 int pktscale; 118 struct sockaddr *saddr; 119 struct ucred *origcred; 120 CLIENT *client; 121 struct netconfig *nconf; 122 struct socket *so; 123 int one = 1, retries, error, printsbmax = 0; 124 struct thread *td = curthread; 125 126 /* 127 * We need to establish the socket using the credentials of 128 * the mountpoint. Some parts of this process (such as 129 * sobind() and soconnect()) will use the curent thread's 130 * credential instead of the socket credential. To work 131 * around this, temporarily change the current thread's 132 * credential to that of the mountpoint. 133 * 134 * XXX: It would be better to explicitly pass the correct 135 * credential to sobind() and soconnect(). 136 */ 137 origcred = td->td_ucred; 138 139 /* 140 * Use the credential in nr_cred, if not NULL. 141 */ 142 if (nrp->nr_cred != NULL) 143 td->td_ucred = nrp->nr_cred; 144 else 145 td->td_ucred = cred; 146 saddr = nrp->nr_nam; 147 148 if (saddr->sa_family == AF_INET) 149 if (nrp->nr_sotype == SOCK_DGRAM) 150 nconf = getnetconfigent("udp"); 151 else 152 nconf = getnetconfigent("tcp"); 153 else 154 if (nrp->nr_sotype == SOCK_DGRAM) 155 nconf = getnetconfigent("udp6"); 156 else 157 nconf = getnetconfigent("tcp6"); 158 159 pktscale = nfs_bufpackets; 160 if (pktscale < 2) 161 pktscale = 2; 162 if (pktscale > 64) 163 pktscale = 64; 164 /* 165 * soreserve() can fail if sb_max is too small, so shrink pktscale 166 * and try again if there is an error. 167 * Print a log message suggesting increasing sb_max. 168 * Creating a socket and doing this is necessary since, if the 169 * reservation sizes are too large and will make soreserve() fail, 170 * the connection will work until a large send is attempted and 171 * then it will loop in the krpc code. 172 */ 173 so = NULL; 174 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *); 175 error = socreate(saddr->sa_family, &so, nrp->nr_sotype, 176 nrp->nr_soproto, td->td_ucred, td); 177 if (error) { 178 td->td_ucred = origcred; 179 return (error); 180 } 181 do { 182 if (error != 0 && pktscale > 2) { 183 pktscale--; 184 if (printsbmax == 0) { 185 printf("nfscl: consider increasing kern.ipc.maxsockbuf\n"); 186 printsbmax = 1; 187 } 188 } 189 if (nrp->nr_sotype == SOCK_DGRAM) { 190 if (nmp != NULL) { 191 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 192 pktscale; 193 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 194 pktscale; 195 } else { 196 sndreserve = rcvreserve = 1024 * pktscale; 197 } 198 } else { 199 if (nrp->nr_sotype != SOCK_STREAM) 200 panic("nfscon sotype"); 201 if (nmp != NULL) { 202 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 203 sizeof (u_int32_t)) * pktscale; 204 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 205 sizeof (u_int32_t)) * pktscale; 206 } else { 207 sndreserve = rcvreserve = 1024 * pktscale; 208 } 209 } 210 error = soreserve(so, sndreserve, rcvreserve); 211 } while (error != 0 && pktscale > 2); 212 soclose(so); 213 if (error) { 214 td->td_ucred = origcred; 215 return (error); 216 } 217 218 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 219 nrp->nr_vers, sndreserve, rcvreserve); 220 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq"); 221 if (nmp != NULL) { 222 if ((nmp->nm_flag & NFSMNT_INT)) 223 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 224 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 225 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 226 if (NFSHASSOFT(nmp)) 227 retries = nmp->nm_retry; 228 else 229 retries = INT_MAX; 230 } else { 231 /* 232 * Three cases: 233 * - Null RPC callback to client 234 * - Non-Null RPC callback to client, wait a little longer 235 * - upcalls to nfsuserd and gssd (clp == NULL) 236 */ 237 if (callback_retry_mult == 0) { 238 retries = NFSV4_UPCALLRETRY; 239 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 240 } else { 241 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 242 } 243 } 244 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 245 246 mtx_lock(&nrp->nr_mtx); 247 if (nrp->nr_client != NULL) { 248 /* 249 * Someone else already connected. 250 */ 251 CLNT_RELEASE(client); 252 } else { 253 nrp->nr_client = client; 254 } 255 256 /* 257 * Protocols that do not require connections may be optionally left 258 * unconnected for servers that reply from a port other than NFS_PORT. 259 */ 260 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 261 mtx_unlock(&nrp->nr_mtx); 262 CLNT_CONTROL(client, CLSET_CONNECT, &one); 263 } else { 264 mtx_unlock(&nrp->nr_mtx); 265 } 266 267 /* Restore current thread's credentials. */ 268 td->td_ucred = origcred; 269 return (0); 270 } 271 272 /* 273 * NFS disconnect. Clean up and unlink. 274 */ 275 void 276 newnfs_disconnect(struct nfssockreq *nrp) 277 { 278 CLIENT *client; 279 280 mtx_lock(&nrp->nr_mtx); 281 if (nrp->nr_client != NULL) { 282 client = nrp->nr_client; 283 nrp->nr_client = NULL; 284 mtx_unlock(&nrp->nr_mtx); 285 #ifdef KGSSAPI 286 rpc_gss_secpurge(client); 287 #endif 288 CLNT_CLOSE(client); 289 CLNT_RELEASE(client); 290 } else { 291 mtx_unlock(&nrp->nr_mtx); 292 } 293 } 294 295 static AUTH * 296 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 297 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 298 { 299 #ifdef KGSSAPI 300 rpc_gss_service_t svc; 301 AUTH *auth; 302 rpc_gss_options_req_t req_options; 303 #endif 304 305 switch (secflavour) { 306 #ifdef KGSSAPI 307 case RPCSEC_GSS_KRB5: 308 case RPCSEC_GSS_KRB5I: 309 case RPCSEC_GSS_KRB5P: 310 if (!mech_oid) { 311 if (!rpc_gss_mech_to_oid("kerberosv5", &mech_oid)) 312 return (NULL); 313 } 314 if (secflavour == RPCSEC_GSS_KRB5) 315 svc = rpc_gss_svc_none; 316 else if (secflavour == RPCSEC_GSS_KRB5I) 317 svc = rpc_gss_svc_integrity; 318 else 319 svc = rpc_gss_svc_privacy; 320 req_options.req_flags = GSS_C_MUTUAL_FLAG; 321 req_options.time_req = 0; 322 req_options.my_cred = GSS_C_NO_CREDENTIAL; 323 req_options.input_channel_bindings = NULL; 324 req_options.enc_type = nfs_keytab_enctype; 325 326 auth = rpc_gss_secfind(nrp->nr_client, cred, 327 clnt_principal, srv_principal, mech_oid, svc, 328 &req_options); 329 return (auth); 330 #endif 331 case AUTH_SYS: 332 default: 333 return (authunix_create(cred)); 334 335 } 336 } 337 338 /* 339 * Callback from the RPC code to generate up/down notifications. 340 */ 341 342 struct nfs_feedback_arg { 343 struct nfsmount *nf_mount; 344 int nf_lastmsg; /* last tprintf */ 345 int nf_tprintfmsg; 346 struct thread *nf_td; 347 }; 348 349 static void 350 nfs_feedback(int type, int proc, void *arg) 351 { 352 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 353 struct nfsmount *nmp = nf->nf_mount; 354 struct timeval now; 355 356 getmicrouptime(&now); 357 358 switch (type) { 359 case FEEDBACK_REXMIT2: 360 case FEEDBACK_RECONNECT: 361 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) { 362 nfs_down(nmp, nf->nf_td, 363 "not responding", 0, NFSSTA_TIMEO); 364 nf->nf_tprintfmsg = TRUE; 365 nf->nf_lastmsg = now.tv_sec; 366 } 367 break; 368 369 case FEEDBACK_OK: 370 nfs_up(nf->nf_mount, nf->nf_td, 371 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 372 break; 373 } 374 } 375 376 /* 377 * newnfs_request - goes something like this 378 * - does the rpc by calling the krpc layer 379 * - break down rpc header and return with nfs reply 380 * nb: always frees up nd_mreq mbuf list 381 */ 382 int 383 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 384 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 385 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 386 u_char *retsum, int toplevel, u_int64_t *xidp) 387 { 388 u_int32_t *tl; 389 time_t waituntil; 390 int i, j; 391 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS; 392 u_int16_t procnum; 393 u_int trylater_delay = 1; 394 struct nfs_feedback_arg nf; 395 struct timeval timo, now; 396 AUTH *auth; 397 struct rpc_callextra ext; 398 enum clnt_stat stat; 399 struct nfsreq *rep = NULL; 400 char *srv_principal = NULL; 401 402 if (xidp != NULL) 403 *xidp = 0; 404 /* Reject requests while attempting a forced unmount. */ 405 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) { 406 m_freem(nd->nd_mreq); 407 return (ESTALE); 408 } 409 410 /* 411 * For a client side mount, nmp is != NULL and clp == NULL. For 412 * server calls (callbacks or upcalls), nmp == NULL. 413 */ 414 if (clp != NULL) { 415 NFSLOCKSTATE(); 416 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 417 secflavour = RPCSEC_GSS_KRB5; 418 if (nd->nd_procnum != NFSPROC_NULL) { 419 if (clp->lc_flags & LCL_GSSINTEGRITY) 420 secflavour = RPCSEC_GSS_KRB5I; 421 else if (clp->lc_flags & LCL_GSSPRIVACY) 422 secflavour = RPCSEC_GSS_KRB5P; 423 } 424 } 425 NFSUNLOCKSTATE(); 426 } else if (nmp != NULL && NFSHASKERB(nmp) && 427 nd->nd_procnum != NFSPROC_NULL) { 428 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 429 nd->nd_flag |= ND_USEGSSNAME; 430 if ((nd->nd_flag & ND_USEGSSNAME) && nmp->nm_krbnamelen > 0) 431 usegssname = 1; 432 if (NFSHASINTEGRITY(nmp)) 433 secflavour = RPCSEC_GSS_KRB5I; 434 else if (NFSHASPRIVACY(nmp)) 435 secflavour = RPCSEC_GSS_KRB5P; 436 else 437 secflavour = RPCSEC_GSS_KRB5; 438 srv_principal = NFSMNT_SRVKRBNAME(nmp); 439 } 440 441 if (nmp != NULL) { 442 bzero(&nf, sizeof(struct nfs_feedback_arg)); 443 nf.nf_mount = nmp; 444 nf.nf_td = td; 445 getmicrouptime(&now); 446 nf.nf_lastmsg = now.tv_sec - 447 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 448 } 449 450 /* 451 * XXX if not already connected call nfs_connect now. Longer 452 * term, change nfs_mount to call nfs_connect unconditionally 453 * and let clnt_reconnect_create handle reconnects. 454 */ 455 if (nrp->nr_client == NULL) 456 newnfs_connect(nmp, nrp, cred, td, 0); 457 458 if (nd->nd_procnum == NFSPROC_NULL) 459 auth = authnone_create(); 460 else if (usegssname) 461 auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname, 462 srv_principal, NULL, cred); 463 else 464 auth = nfs_getauth(nrp, secflavour, NULL, 465 srv_principal, NULL, cred); 466 if (auth == NULL) { 467 m_freem(nd->nd_mreq); 468 return (EACCES); 469 } 470 bzero(&ext, sizeof(ext)); 471 ext.rc_auth = auth; 472 if (nmp != NULL) { 473 ext.rc_feedback = nfs_feedback; 474 ext.rc_feedback_arg = &nf; 475 } 476 477 procnum = nd->nd_procnum; 478 if ((nd->nd_flag & ND_NFSV4) && 479 nd->nd_procnum != NFSPROC_NULL && 480 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 481 procnum = NFSV4PROC_COMPOUND; 482 483 if (nmp != NULL) { 484 NFSINCRGLOBAL(newnfsstats.rpcrequests); 485 /* 486 * Now only used for the R_DONTRECOVER case, but until that is 487 * supported within the krpc code, I need to keep a queue of 488 * outstanding RPCs for nfsv4 client requests. 489 */ 490 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 491 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), 492 M_NFSDREQ, M_WAITOK); 493 } 494 trycnt = 0; 495 tryagain: 496 if (nmp == NULL) { 497 timo.tv_usec = 0; 498 if (clp == NULL) 499 timo.tv_sec = NFSV4_UPCALLTIMEO; 500 else 501 timo.tv_sec = NFSV4_CALLBACKTIMEO; 502 } else { 503 if (nrp->nr_sotype != SOCK_DGRAM) { 504 timo.tv_usec = 0; 505 if ((nmp->nm_flag & NFSMNT_NFSV4)) 506 timo.tv_sec = INT_MAX; 507 else 508 timo.tv_sec = NFS_TCPTIMEO; 509 } else { 510 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 511 timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ; 512 } 513 514 if (rep != NULL) { 515 rep->r_flags = 0; 516 rep->r_nmp = nmp; 517 /* 518 * Chain request into list of outstanding requests. 519 */ 520 NFSLOCKREQ(); 521 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 522 NFSUNLOCKREQ(); 523 } 524 } 525 526 nd->nd_mrep = NULL; 527 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq, 528 &nd->nd_mrep, timo); 529 530 if (rep != NULL) { 531 /* 532 * RPC done, unlink the request. 533 */ 534 NFSLOCKREQ(); 535 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 536 NFSUNLOCKREQ(); 537 } 538 539 /* 540 * If there was a successful reply and a tprintf msg. 541 * tprintf a response. 542 */ 543 if (stat == RPC_SUCCESS) { 544 error = 0; 545 } else if (stat == RPC_TIMEDOUT) { 546 error = ETIMEDOUT; 547 } else if (stat == RPC_VERSMISMATCH) { 548 error = EOPNOTSUPP; 549 } else if (stat == RPC_PROGVERSMISMATCH) { 550 error = EPROTONOSUPPORT; 551 } else { 552 error = EACCES; 553 } 554 if (error) { 555 m_freem(nd->nd_mreq); 556 AUTH_DESTROY(auth); 557 if (rep != NULL) 558 FREE((caddr_t)rep, M_NFSDREQ); 559 return (error); 560 } 561 562 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 563 564 nd->nd_md = nd->nd_mrep; 565 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 566 nd->nd_repstat = 0; 567 if (nd->nd_procnum != NFSPROC_NULL) { 568 /* 569 * and now the actual NFS xdr. 570 */ 571 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 572 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 573 if (nd->nd_repstat != 0) { 574 if ((nd->nd_repstat == NFSERR_DELAY && 575 (nd->nd_flag & ND_NFSV4) && 576 nd->nd_procnum != NFSPROC_SETATTR && 577 nd->nd_procnum != NFSPROC_READ && 578 nd->nd_procnum != NFSPROC_WRITE && 579 nd->nd_procnum != NFSPROC_OPEN && 580 nd->nd_procnum != NFSPROC_CREATE && 581 nd->nd_procnum != NFSPROC_OPENCONFIRM && 582 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 583 nd->nd_procnum != NFSPROC_CLOSE && 584 nd->nd_procnum != NFSPROC_LOCK && 585 nd->nd_procnum != NFSPROC_LOCKU) || 586 (nd->nd_repstat == NFSERR_DELAY && 587 (nd->nd_flag & ND_NFSV4) == 0) || 588 nd->nd_repstat == NFSERR_RESOURCE) { 589 if (trylater_delay > NFS_TRYLATERDEL) 590 trylater_delay = NFS_TRYLATERDEL; 591 waituntil = NFSD_MONOSEC + trylater_delay; 592 while (NFSD_MONOSEC < waituntil) 593 (void) nfs_catnap(PZERO, "nfstry"); 594 trylater_delay *= 2; 595 goto tryagain; 596 } 597 598 /* 599 * If the File Handle was stale, invalidate the 600 * lookup cache, just in case. 601 * (vp != NULL implies a client side call) 602 */ 603 if (nd->nd_repstat == ESTALE && vp != NULL) { 604 cache_purge(vp); 605 if (ncl_call_invalcaches != NULL) 606 (*ncl_call_invalcaches)(vp); 607 } 608 } 609 610 /* 611 * Get rid of the tag, return count, and PUTFH result for V4. 612 */ 613 if (nd->nd_flag & ND_NFSV4) { 614 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 615 i = fxdr_unsigned(int, *tl); 616 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 617 if (error) 618 goto nfsmout; 619 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 620 i = fxdr_unsigned(int, *++tl); 621 622 /* 623 * If the first op's status is non-zero, mark that 624 * there is no more data to process. 625 */ 626 if (*++tl) 627 nd->nd_flag |= ND_NOMOREDATA; 628 629 /* 630 * If the first op is Putfh, throw its results away 631 * and toss the op# and status for the first op. 632 */ 633 if (nmp != NULL && i == NFSV4OP_PUTFH && *tl == 0) { 634 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 635 i = fxdr_unsigned(int, *tl++); 636 j = fxdr_unsigned(int, *tl); 637 /* 638 * All Compounds that do an Op that must 639 * be in sequence consist of NFSV4OP_PUTFH 640 * followed by one of these. As such, we 641 * can determine if the seqid# should be 642 * incremented, here. 643 */ 644 if ((i == NFSV4OP_OPEN || 645 i == NFSV4OP_OPENCONFIRM || 646 i == NFSV4OP_OPENDOWNGRADE || 647 i == NFSV4OP_CLOSE || 648 i == NFSV4OP_LOCK || 649 i == NFSV4OP_LOCKU) && 650 (j == 0 || 651 (j != NFSERR_STALECLIENTID && 652 j != NFSERR_STALESTATEID && 653 j != NFSERR_BADSTATEID && 654 j != NFSERR_BADSEQID && 655 j != NFSERR_BADXDR && 656 j != NFSERR_RESOURCE && 657 j != NFSERR_NOFILEHANDLE))) 658 nd->nd_flag |= ND_INCRSEQID; 659 /* 660 * If the first op's status is non-zero, mark 661 * that there is no more data to process. 662 */ 663 if (j) 664 nd->nd_flag |= ND_NOMOREDATA; 665 } 666 667 /* 668 * If R_DONTRECOVER is set, replace the stale error 669 * reply, so that recovery isn't initiated. 670 */ 671 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 672 nd->nd_repstat == NFSERR_STALESTATEID) && 673 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 674 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 675 } 676 } 677 678 m_freem(nd->nd_mreq); 679 AUTH_DESTROY(auth); 680 if (rep != NULL) 681 FREE((caddr_t)rep, M_NFSDREQ); 682 return (0); 683 nfsmout: 684 mbuf_freem(nd->nd_mrep); 685 mbuf_freem(nd->nd_mreq); 686 AUTH_DESTROY(auth); 687 if (rep != NULL) 688 FREE((caddr_t)rep, M_NFSDREQ); 689 return (error); 690 } 691 692 /* 693 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 694 * wait for all requests to complete. This is used by forced unmounts 695 * to terminate any outstanding RPCs. 696 */ 697 int 698 newnfs_nmcancelreqs(struct nfsmount *nmp) 699 { 700 701 if (nmp->nm_sockreq.nr_client != NULL) 702 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 703 return (0); 704 } 705 706 /* 707 * Any signal that can interrupt an NFS operation in an intr mount 708 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 709 */ 710 int newnfs_sig_set[] = { 711 SIGINT, 712 SIGTERM, 713 SIGHUP, 714 SIGKILL, 715 SIGSTOP, 716 SIGQUIT 717 }; 718 719 /* 720 * Check to see if one of the signals in our subset is pending on 721 * the process (in an intr mount). 722 */ 723 static int 724 nfs_sig_pending(sigset_t set) 725 { 726 int i; 727 728 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) 729 if (SIGISMEMBER(set, newnfs_sig_set[i])) 730 return (1); 731 return (0); 732 } 733 734 /* 735 * The set/restore sigmask functions are used to (temporarily) overwrite 736 * the process p_sigmask during an RPC call (for example). These are also 737 * used in other places in the NFS client that might tsleep(). 738 */ 739 void 740 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 741 { 742 sigset_t newset; 743 int i; 744 struct proc *p; 745 746 SIGFILLSET(newset); 747 if (td == NULL) 748 td = curthread; /* XXX */ 749 p = td->td_proc; 750 /* Remove the NFS set of signals from newset */ 751 PROC_LOCK(p); 752 mtx_lock(&p->p_sigacts->ps_mtx); 753 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) { 754 /* 755 * But make sure we leave the ones already masked 756 * by the process, ie. remove the signal from the 757 * temporary signalmask only if it wasn't already 758 * in p_sigmask. 759 */ 760 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 761 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 762 SIGDELSET(newset, newnfs_sig_set[i]); 763 } 764 mtx_unlock(&p->p_sigacts->ps_mtx); 765 PROC_UNLOCK(p); 766 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0); 767 } 768 769 void 770 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 771 { 772 if (td == NULL) 773 td = curthread; /* XXX */ 774 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 775 } 776 777 /* 778 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 779 * old one after msleep() returns. 780 */ 781 int 782 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 783 { 784 sigset_t oldset; 785 int error; 786 struct proc *p; 787 788 if ((priority & PCATCH) == 0) 789 return msleep(ident, mtx, priority, wmesg, timo); 790 if (td == NULL) 791 td = curthread; /* XXX */ 792 newnfs_set_sigmask(td, &oldset); 793 error = msleep(ident, mtx, priority, wmesg, timo); 794 newnfs_restore_sigmask(td, &oldset); 795 p = td->td_proc; 796 return (error); 797 } 798 799 /* 800 * Test for a termination condition pending on the process. 801 * This is used for NFSMNT_INT mounts. 802 */ 803 int 804 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 805 { 806 struct proc *p; 807 sigset_t tmpset; 808 809 /* Terminate all requests while attempting a forced unmount. */ 810 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) 811 return (EIO); 812 if (!(nmp->nm_flag & NFSMNT_INT)) 813 return (0); 814 if (td == NULL) 815 return (0); 816 p = td->td_proc; 817 PROC_LOCK(p); 818 tmpset = p->p_siglist; 819 SIGSETOR(tmpset, td->td_siglist); 820 SIGSETNAND(tmpset, td->td_sigmask); 821 mtx_lock(&p->p_sigacts->ps_mtx); 822 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 823 mtx_unlock(&p->p_sigacts->ps_mtx); 824 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 825 && nfs_sig_pending(tmpset)) { 826 PROC_UNLOCK(p); 827 return (EINTR); 828 } 829 PROC_UNLOCK(p); 830 return (0); 831 } 832 833 static int 834 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 835 { 836 struct proc *p; 837 838 p = td ? td->td_proc : NULL; 839 if (error) { 840 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n", 841 server, msg, error); 842 } else { 843 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg); 844 } 845 return (0); 846 } 847 848 static void 849 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 850 int error, int flags) 851 { 852 if (nmp == NULL) 853 return; 854 mtx_lock(&nmp->nm_mtx); 855 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 856 nmp->nm_state |= NFSSTA_TIMEO; 857 mtx_unlock(&nmp->nm_mtx); 858 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 859 VQ_NOTRESP, 0); 860 } else 861 mtx_unlock(&nmp->nm_mtx); 862 mtx_lock(&nmp->nm_mtx); 863 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 864 nmp->nm_state |= NFSSTA_LOCKTIMEO; 865 mtx_unlock(&nmp->nm_mtx); 866 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 867 VQ_NOTRESPLOCK, 0); 868 } else 869 mtx_unlock(&nmp->nm_mtx); 870 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 871 } 872 873 static void 874 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 875 int flags, int tprintfmsg) 876 { 877 if (nmp == NULL) 878 return; 879 if (tprintfmsg) { 880 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 881 } 882 883 mtx_lock(&nmp->nm_mtx); 884 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 885 nmp->nm_state &= ~NFSSTA_TIMEO; 886 mtx_unlock(&nmp->nm_mtx); 887 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 888 VQ_NOTRESP, 1); 889 } else 890 mtx_unlock(&nmp->nm_mtx); 891 892 mtx_lock(&nmp->nm_mtx); 893 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 894 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 895 mtx_unlock(&nmp->nm_mtx); 896 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 897 VQ_NOTRESPLOCK, 1); 898 } else 899 mtx_unlock(&nmp->nm_mtx); 900 } 901 902