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_kdtrace.h" 43 #include "opt_kgssapi.h" 44 #include "opt_nfs.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/limits.h> 50 #include <sys/lock.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/mount.h> 54 #include <sys/mutex.h> 55 #include <sys/proc.h> 56 #include <sys/signalvar.h> 57 #include <sys/syscallsubr.h> 58 #include <sys/sysctl.h> 59 #include <sys/syslog.h> 60 #include <sys/vnode.h> 61 62 #include <rpc/rpc.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[NFS_NPROCS + 1]; 81 uint32_t nfscl_nfs2_done_probes[NFS_NPROCS + 1]; 82 83 uint32_t nfscl_nfs3_start_probes[NFS_NPROCS + 1]; 84 uint32_t nfscl_nfs3_done_probes[NFS_NPROCS + 1]; 85 86 uint32_t nfscl_nfs4_start_probes[NFS_NPROCS + 1]; 87 uint32_t nfscl_nfs4_done_probes[NFS_NPROCS + 1]; 88 #endif 89 90 NFSSTATESPINLOCK; 91 NFSREQSPINLOCK; 92 extern struct nfsstats newnfsstats; 93 extern struct nfsreqhead nfsd_reqq; 94 extern int nfscl_ticks; 95 extern void (*ncl_call_invalcaches)(struct vnode *); 96 97 static int nfsrv_gsscallbackson = 0; 98 static int nfs_bufpackets = 4; 99 static int nfs_reconnects; 100 static int nfs3_jukebox_delay = 10; 101 static int nfs_skip_wcc_data_onerr = 1; 102 static int nfs_keytab_enctype = ETYPE_DES_CBC_CRC; 103 104 SYSCTL_DECL(_vfs_nfs); 105 106 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, 107 "Buffer reservation size 2 < x < 64"); 108 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, 109 "Number of times the nfs client has had to reconnect"); 110 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0, 111 "Number of seconds to delay a retry after receiving EJUKEBOX"); 112 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0, 113 "Disable weak cache consistency checking when server returns an error"); 114 SYSCTL_INT(_vfs_nfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0, 115 "Encryption type for the keytab entry used by nfs"); 116 117 static void nfs_down(struct nfsmount *, struct thread *, const char *, 118 int, int); 119 static void nfs_up(struct nfsmount *, struct thread *, const char *, 120 int, int); 121 static int nfs_msg(struct thread *, const char *, const char *, int); 122 123 struct nfs_cached_auth { 124 int ca_refs; /* refcount, including 1 from the cache */ 125 uid_t ca_uid; /* uid that corresponds to this auth */ 126 AUTH *ca_auth; /* RPC auth handle */ 127 }; 128 129 static int nfsv2_procid[NFS_V3NPROCS] = { 130 NFSV2PROC_NULL, 131 NFSV2PROC_GETATTR, 132 NFSV2PROC_SETATTR, 133 NFSV2PROC_LOOKUP, 134 NFSV2PROC_NOOP, 135 NFSV2PROC_READLINK, 136 NFSV2PROC_READ, 137 NFSV2PROC_WRITE, 138 NFSV2PROC_CREATE, 139 NFSV2PROC_MKDIR, 140 NFSV2PROC_SYMLINK, 141 NFSV2PROC_CREATE, 142 NFSV2PROC_REMOVE, 143 NFSV2PROC_RMDIR, 144 NFSV2PROC_RENAME, 145 NFSV2PROC_LINK, 146 NFSV2PROC_READDIR, 147 NFSV2PROC_NOOP, 148 NFSV2PROC_STATFS, 149 NFSV2PROC_NOOP, 150 NFSV2PROC_NOOP, 151 NFSV2PROC_NOOP, 152 }; 153 154 /* 155 * Initialize sockets and congestion for a new NFS connection. 156 * We do not free the sockaddr if error. 157 */ 158 int 159 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp, 160 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult) 161 { 162 int rcvreserve, sndreserve; 163 int pktscale; 164 struct sockaddr *saddr; 165 struct ucred *origcred; 166 CLIENT *client; 167 struct netconfig *nconf; 168 struct socket *so; 169 int one = 1, retries, error; 170 struct thread *td = curthread; 171 172 /* 173 * We need to establish the socket using the credentials of 174 * the mountpoint. Some parts of this process (such as 175 * sobind() and soconnect()) will use the curent thread's 176 * credential instead of the socket credential. To work 177 * around this, temporarily change the current thread's 178 * credential to that of the mountpoint. 179 * 180 * XXX: It would be better to explicitly pass the correct 181 * credential to sobind() and soconnect(). 182 */ 183 origcred = td->td_ucred; 184 185 /* 186 * Use the credential in nr_cred, if not NULL. 187 */ 188 if (nrp->nr_cred != NULL) 189 td->td_ucred = nrp->nr_cred; 190 else 191 td->td_ucred = cred; 192 saddr = nrp->nr_nam; 193 194 if (saddr->sa_family == AF_INET) 195 if (nrp->nr_sotype == SOCK_DGRAM) 196 nconf = getnetconfigent("udp"); 197 else 198 nconf = getnetconfigent("tcp"); 199 else 200 if (nrp->nr_sotype == SOCK_DGRAM) 201 nconf = getnetconfigent("udp6"); 202 else 203 nconf = getnetconfigent("tcp6"); 204 205 pktscale = nfs_bufpackets; 206 if (pktscale < 2) 207 pktscale = 2; 208 if (pktscale > 64) 209 pktscale = 64; 210 /* 211 * soreserve() can fail if sb_max is too small, so shrink pktscale 212 * and try again if there is an error. 213 * Print a log message suggesting increasing sb_max. 214 * Creating a socket and doing this is necessary since, if the 215 * reservation sizes are too large and will make soreserve() fail, 216 * the connection will work until a large send is attempted and 217 * then it will loop in the krpc code. 218 */ 219 so = NULL; 220 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *); 221 error = socreate(saddr->sa_family, &so, nrp->nr_sotype, 222 nrp->nr_soproto, td->td_ucred, td); 223 if (error) { 224 td->td_ucred = origcred; 225 return (error); 226 } 227 do { 228 if (error != 0 && pktscale > 2) 229 pktscale--; 230 if (nrp->nr_sotype == SOCK_DGRAM) { 231 if (nmp != NULL) { 232 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 233 pktscale; 234 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * 235 pktscale; 236 } else { 237 sndreserve = rcvreserve = 1024 * pktscale; 238 } 239 } else { 240 if (nrp->nr_sotype != SOCK_STREAM) 241 panic("nfscon sotype"); 242 if (nmp != NULL) { 243 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 244 sizeof (u_int32_t)) * pktscale; 245 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + 246 sizeof (u_int32_t)) * pktscale; 247 } else { 248 sndreserve = rcvreserve = 1024 * pktscale; 249 } 250 } 251 error = soreserve(so, sndreserve, rcvreserve); 252 } while (error != 0 && pktscale > 2); 253 soclose(so); 254 if (error) { 255 td->td_ucred = origcred; 256 return (error); 257 } 258 259 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, 260 nrp->nr_vers, sndreserve, rcvreserve); 261 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq"); 262 if (nmp != NULL) { 263 if ((nmp->nm_flag & NFSMNT_INT)) 264 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); 265 if ((nmp->nm_flag & NFSMNT_RESVPORT)) 266 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 267 if (NFSHASSOFT(nmp)) 268 retries = nmp->nm_retry; 269 else 270 retries = INT_MAX; 271 } else { 272 /* 273 * Three cases: 274 * - Null RPC callback to client 275 * - Non-Null RPC callback to client, wait a little longer 276 * - upcalls to nfsuserd and gssd (clp == NULL) 277 */ 278 if (callback_retry_mult == 0) { 279 retries = NFSV4_UPCALLRETRY; 280 CLNT_CONTROL(client, CLSET_PRIVPORT, &one); 281 } else { 282 retries = NFSV4_CALLBACKRETRY * callback_retry_mult; 283 } 284 } 285 CLNT_CONTROL(client, CLSET_RETRIES, &retries); 286 287 mtx_lock(&nrp->nr_mtx); 288 if (nrp->nr_client != NULL) { 289 /* 290 * Someone else already connected. 291 */ 292 CLNT_RELEASE(client); 293 } else { 294 nrp->nr_client = client; 295 } 296 297 /* 298 * Protocols that do not require connections may be optionally left 299 * unconnected for servers that reply from a port other than NFS_PORT. 300 */ 301 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { 302 mtx_unlock(&nrp->nr_mtx); 303 CLNT_CONTROL(client, CLSET_CONNECT, &one); 304 } else { 305 mtx_unlock(&nrp->nr_mtx); 306 } 307 308 /* Restore current thread's credentials. */ 309 td->td_ucred = origcred; 310 return (0); 311 } 312 313 /* 314 * NFS disconnect. Clean up and unlink. 315 */ 316 void 317 newnfs_disconnect(struct nfssockreq *nrp) 318 { 319 CLIENT *client; 320 321 mtx_lock(&nrp->nr_mtx); 322 if (nrp->nr_client != NULL) { 323 client = nrp->nr_client; 324 nrp->nr_client = NULL; 325 mtx_unlock(&nrp->nr_mtx); 326 rpc_gss_secpurge_call(client); 327 CLNT_CLOSE(client); 328 CLNT_RELEASE(client); 329 } else { 330 mtx_unlock(&nrp->nr_mtx); 331 } 332 } 333 334 static AUTH * 335 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, 336 char *srv_principal, gss_OID mech_oid, struct ucred *cred) 337 { 338 rpc_gss_service_t svc; 339 AUTH *auth; 340 #ifdef notyet 341 rpc_gss_options_req_t req_options; 342 #endif 343 344 switch (secflavour) { 345 case RPCSEC_GSS_KRB5: 346 case RPCSEC_GSS_KRB5I: 347 case RPCSEC_GSS_KRB5P: 348 if (!mech_oid) { 349 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid)) 350 return (NULL); 351 } 352 if (secflavour == RPCSEC_GSS_KRB5) 353 svc = rpc_gss_svc_none; 354 else if (secflavour == RPCSEC_GSS_KRB5I) 355 svc = rpc_gss_svc_integrity; 356 else 357 svc = rpc_gss_svc_privacy; 358 #ifdef notyet 359 req_options.req_flags = GSS_C_MUTUAL_FLAG; 360 req_options.time_req = 0; 361 req_options.my_cred = GSS_C_NO_CREDENTIAL; 362 req_options.input_channel_bindings = NULL; 363 req_options.enc_type = nfs_keytab_enctype; 364 365 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 366 clnt_principal, srv_principal, mech_oid, svc, 367 &req_options); 368 #else 369 /* 370 * Until changes to the rpcsec_gss code are committed, 371 * there is no support for host based initiator 372 * principals. As such, that case cannot yet be handled. 373 */ 374 if (clnt_principal == NULL) 375 auth = rpc_gss_secfind_call(nrp->nr_client, cred, 376 srv_principal, mech_oid, svc); 377 else 378 auth = NULL; 379 #endif 380 if (auth != NULL) 381 return (auth); 382 /* fallthrough */ 383 case AUTH_SYS: 384 default: 385 return (authunix_create(cred)); 386 387 } 388 } 389 390 /* 391 * Callback from the RPC code to generate up/down notifications. 392 */ 393 394 struct nfs_feedback_arg { 395 struct nfsmount *nf_mount; 396 int nf_lastmsg; /* last tprintf */ 397 int nf_tprintfmsg; 398 struct thread *nf_td; 399 }; 400 401 static void 402 nfs_feedback(int type, int proc, void *arg) 403 { 404 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; 405 struct nfsmount *nmp = nf->nf_mount; 406 struct timeval now; 407 408 getmicrouptime(&now); 409 410 switch (type) { 411 case FEEDBACK_REXMIT2: 412 case FEEDBACK_RECONNECT: 413 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) { 414 nfs_down(nmp, nf->nf_td, 415 "not responding", 0, NFSSTA_TIMEO); 416 nf->nf_tprintfmsg = TRUE; 417 nf->nf_lastmsg = now.tv_sec; 418 } 419 break; 420 421 case FEEDBACK_OK: 422 nfs_up(nf->nf_mount, nf->nf_td, 423 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); 424 break; 425 } 426 } 427 428 /* 429 * newnfs_request - goes something like this 430 * - does the rpc by calling the krpc layer 431 * - break down rpc header and return with nfs reply 432 * nb: always frees up nd_mreq mbuf list 433 */ 434 int 435 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, 436 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, 437 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, 438 u_char *retsum, int toplevel, u_int64_t *xidp) 439 { 440 u_int32_t *tl; 441 time_t waituntil; 442 int i, j, set_uid = 0, set_sigset = 0; 443 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS; 444 u_int16_t procnum; 445 u_int trylater_delay = 1; 446 struct nfs_feedback_arg nf; 447 struct timeval timo, now; 448 AUTH *auth; 449 struct rpc_callextra ext; 450 enum clnt_stat stat; 451 struct nfsreq *rep = NULL; 452 char *srv_principal = NULL; 453 uid_t saved_uid = (uid_t)-1; 454 sigset_t oldset; 455 456 if (xidp != NULL) 457 *xidp = 0; 458 /* Reject requests while attempting a forced unmount. */ 459 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) { 460 m_freem(nd->nd_mreq); 461 return (ESTALE); 462 } 463 464 /* For client side interruptible mounts, mask off the signals. */ 465 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) { 466 newnfs_set_sigmask(td, &oldset); 467 set_sigset = 1; 468 } 469 470 /* 471 * XXX if not already connected call nfs_connect now. Longer 472 * term, change nfs_mount to call nfs_connect unconditionally 473 * and let clnt_reconnect_create handle reconnects. 474 */ 475 if (nrp->nr_client == NULL) 476 newnfs_connect(nmp, nrp, cred, td, 0); 477 478 /* 479 * For a client side mount, nmp is != NULL and clp == NULL. For 480 * server calls (callbacks or upcalls), nmp == NULL. 481 */ 482 if (clp != NULL) { 483 NFSLOCKSTATE(); 484 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { 485 secflavour = RPCSEC_GSS_KRB5; 486 if (nd->nd_procnum != NFSPROC_NULL) { 487 if (clp->lc_flags & LCL_GSSINTEGRITY) 488 secflavour = RPCSEC_GSS_KRB5I; 489 else if (clp->lc_flags & LCL_GSSPRIVACY) 490 secflavour = RPCSEC_GSS_KRB5P; 491 } 492 } 493 NFSUNLOCKSTATE(); 494 } else if (nmp != NULL && NFSHASKERB(nmp) && 495 nd->nd_procnum != NFSPROC_NULL) { 496 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) 497 nd->nd_flag |= ND_USEGSSNAME; 498 if ((nd->nd_flag & ND_USEGSSNAME) != 0) { 499 /* 500 * If there is a client side host based credential, 501 * use that, otherwise use the system uid, if set. 502 */ 503 if (nmp->nm_krbnamelen > 0) { 504 usegssname = 1; 505 } else if (nmp->nm_uid != (uid_t)-1) { 506 saved_uid = cred->cr_uid; 507 cred->cr_uid = nmp->nm_uid; 508 set_uid = 1; 509 } 510 } else if (nmp->nm_krbnamelen == 0 && 511 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) { 512 /* 513 * If there is no host based principal name and 514 * the system uid is set and this is root, use the 515 * system uid, since root won't have user 516 * credentials in a credentials cache file. 517 */ 518 saved_uid = cred->cr_uid; 519 cred->cr_uid = nmp->nm_uid; 520 set_uid = 1; 521 } 522 if (NFSHASINTEGRITY(nmp)) 523 secflavour = RPCSEC_GSS_KRB5I; 524 else if (NFSHASPRIVACY(nmp)) 525 secflavour = RPCSEC_GSS_KRB5P; 526 else 527 secflavour = RPCSEC_GSS_KRB5; 528 srv_principal = NFSMNT_SRVKRBNAME(nmp); 529 } else if (nmp != NULL && !NFSHASKERB(nmp) && 530 nd->nd_procnum != NFSPROC_NULL && 531 (nd->nd_flag & ND_USEGSSNAME) != 0) { 532 /* 533 * Use the uid that did the mount when the RPC is doing 534 * NFSv4 system operations, as indicated by the 535 * ND_USEGSSNAME flag, for the AUTH_SYS case. 536 */ 537 saved_uid = cred->cr_uid; 538 if (nmp->nm_uid != (uid_t)-1) 539 cred->cr_uid = nmp->nm_uid; 540 else 541 cred->cr_uid = 0; 542 set_uid = 1; 543 } 544 545 if (nmp != NULL) { 546 bzero(&nf, sizeof(struct nfs_feedback_arg)); 547 nf.nf_mount = nmp; 548 nf.nf_td = td; 549 getmicrouptime(&now); 550 nf.nf_lastmsg = now.tv_sec - 551 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); 552 } 553 554 if (nd->nd_procnum == NFSPROC_NULL) 555 auth = authnone_create(); 556 else if (usegssname) 557 auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname, 558 srv_principal, NULL, cred); 559 else 560 auth = nfs_getauth(nrp, secflavour, NULL, 561 srv_principal, NULL, cred); 562 if (set_uid) 563 cred->cr_uid = saved_uid; 564 if (auth == NULL) { 565 m_freem(nd->nd_mreq); 566 if (set_sigset) 567 newnfs_restore_sigmask(td, &oldset); 568 return (EACCES); 569 } 570 bzero(&ext, sizeof(ext)); 571 ext.rc_auth = auth; 572 if (nmp != NULL) { 573 ext.rc_feedback = nfs_feedback; 574 ext.rc_feedback_arg = &nf; 575 } 576 577 procnum = nd->nd_procnum; 578 if ((nd->nd_flag & ND_NFSV4) && 579 nd->nd_procnum != NFSPROC_NULL && 580 nd->nd_procnum != NFSV4PROC_CBCOMPOUND) 581 procnum = NFSV4PROC_COMPOUND; 582 583 if (nmp != NULL) { 584 NFSINCRGLOBAL(newnfsstats.rpcrequests); 585 586 /* Map the procnum to the old NFSv2 one, as required. */ 587 if ((nd->nd_flag & ND_NFSV2) != 0) { 588 if (nd->nd_procnum < NFS_V3NPROCS) 589 procnum = nfsv2_procid[nd->nd_procnum]; 590 else 591 procnum = NFSV2PROC_NOOP; 592 } 593 594 /* 595 * Now only used for the R_DONTRECOVER case, but until that is 596 * supported within the krpc code, I need to keep a queue of 597 * outstanding RPCs for nfsv4 client requests. 598 */ 599 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) 600 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), 601 M_NFSDREQ, M_WAITOK); 602 #ifdef KDTRACE_HOOKS 603 if (dtrace_nfscl_nfs234_start_probe != NULL) { 604 uint32_t probe_id; 605 int probe_procnum; 606 607 if (nd->nd_flag & ND_NFSV4) { 608 probe_id = 609 nfscl_nfs4_start_probes[nd->nd_procnum]; 610 probe_procnum = nd->nd_procnum; 611 } else if (nd->nd_flag & ND_NFSV3) { 612 probe_id = nfscl_nfs3_start_probes[procnum]; 613 probe_procnum = procnum; 614 } else { 615 probe_id = 616 nfscl_nfs2_start_probes[nd->nd_procnum]; 617 probe_procnum = procnum; 618 } 619 if (probe_id != 0) 620 (dtrace_nfscl_nfs234_start_probe) 621 (probe_id, vp, nd->nd_mreq, cred, 622 probe_procnum); 623 } 624 #endif 625 } 626 trycnt = 0; 627 tryagain: 628 if (nmp == NULL) { 629 timo.tv_usec = 0; 630 if (clp == NULL) 631 timo.tv_sec = NFSV4_UPCALLTIMEO; 632 else 633 timo.tv_sec = NFSV4_CALLBACKTIMEO; 634 } else { 635 if (nrp->nr_sotype != SOCK_DGRAM) { 636 timo.tv_usec = 0; 637 if ((nmp->nm_flag & NFSMNT_NFSV4)) 638 timo.tv_sec = INT_MAX; 639 else 640 timo.tv_sec = NFS_TCPTIMEO; 641 } else { 642 timo.tv_sec = nmp->nm_timeo / NFS_HZ; 643 timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ; 644 } 645 646 if (rep != NULL) { 647 rep->r_flags = 0; 648 rep->r_nmp = nmp; 649 /* 650 * Chain request into list of outstanding requests. 651 */ 652 NFSLOCKREQ(); 653 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); 654 NFSUNLOCKREQ(); 655 } 656 } 657 658 nd->nd_mrep = NULL; 659 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq, 660 &nd->nd_mrep, timo); 661 662 if (rep != NULL) { 663 /* 664 * RPC done, unlink the request. 665 */ 666 NFSLOCKREQ(); 667 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); 668 NFSUNLOCKREQ(); 669 } 670 671 /* 672 * If there was a successful reply and a tprintf msg. 673 * tprintf a response. 674 */ 675 if (stat == RPC_SUCCESS) { 676 error = 0; 677 } else if (stat == RPC_TIMEDOUT) { 678 error = ETIMEDOUT; 679 } else if (stat == RPC_VERSMISMATCH) { 680 error = EOPNOTSUPP; 681 } else if (stat == RPC_PROGVERSMISMATCH) { 682 error = EPROTONOSUPPORT; 683 } else { 684 error = EACCES; 685 } 686 if (error) { 687 m_freem(nd->nd_mreq); 688 AUTH_DESTROY(auth); 689 if (rep != NULL) 690 FREE((caddr_t)rep, M_NFSDREQ); 691 if (set_sigset) 692 newnfs_restore_sigmask(td, &oldset); 693 return (error); 694 } 695 696 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); 697 698 /* 699 * Search for any mbufs that are not a multiple of 4 bytes long 700 * or with m_data not longword aligned. 701 * These could cause pointer alignment problems, so copy them to 702 * well aligned mbufs. 703 */ 704 newnfs_realign(&nd->nd_mrep); 705 nd->nd_md = nd->nd_mrep; 706 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); 707 nd->nd_repstat = 0; 708 if (nd->nd_procnum != NFSPROC_NULL) { 709 /* 710 * and now the actual NFS xdr. 711 */ 712 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 713 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); 714 if (nd->nd_repstat != 0) { 715 if ((nd->nd_repstat == NFSERR_DELAY && 716 (nd->nd_flag & ND_NFSV4) && 717 nd->nd_procnum != NFSPROC_SETATTR && 718 nd->nd_procnum != NFSPROC_READ && 719 nd->nd_procnum != NFSPROC_WRITE && 720 nd->nd_procnum != NFSPROC_OPEN && 721 nd->nd_procnum != NFSPROC_CREATE && 722 nd->nd_procnum != NFSPROC_OPENCONFIRM && 723 nd->nd_procnum != NFSPROC_OPENDOWNGRADE && 724 nd->nd_procnum != NFSPROC_CLOSE && 725 nd->nd_procnum != NFSPROC_LOCK && 726 nd->nd_procnum != NFSPROC_LOCKU) || 727 (nd->nd_repstat == NFSERR_DELAY && 728 (nd->nd_flag & ND_NFSV4) == 0) || 729 nd->nd_repstat == NFSERR_RESOURCE) { 730 if (trylater_delay > NFS_TRYLATERDEL) 731 trylater_delay = NFS_TRYLATERDEL; 732 waituntil = NFSD_MONOSEC + trylater_delay; 733 while (NFSD_MONOSEC < waituntil) 734 (void) nfs_catnap(PZERO, 0, "nfstry"); 735 trylater_delay *= 2; 736 goto tryagain; 737 } 738 739 /* 740 * If the File Handle was stale, invalidate the 741 * lookup cache, just in case. 742 * (vp != NULL implies a client side call) 743 */ 744 if (nd->nd_repstat == ESTALE && vp != NULL) { 745 cache_purge(vp); 746 if (ncl_call_invalcaches != NULL) 747 (*ncl_call_invalcaches)(vp); 748 } 749 } 750 751 /* 752 * Get rid of the tag, return count, and PUTFH result for V4. 753 */ 754 if (nd->nd_flag & ND_NFSV4) { 755 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 756 i = fxdr_unsigned(int, *tl); 757 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 758 if (error) 759 goto nfsmout; 760 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 761 i = fxdr_unsigned(int, *++tl); 762 763 /* 764 * If the first op's status is non-zero, mark that 765 * there is no more data to process. 766 */ 767 if (*++tl) 768 nd->nd_flag |= ND_NOMOREDATA; 769 770 /* 771 * If the first op is Putfh, throw its results away 772 * and toss the op# and status for the first op. 773 */ 774 if (nmp != NULL && i == NFSV4OP_PUTFH && *tl == 0) { 775 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); 776 i = fxdr_unsigned(int, *tl++); 777 j = fxdr_unsigned(int, *tl); 778 /* 779 * All Compounds that do an Op that must 780 * be in sequence consist of NFSV4OP_PUTFH 781 * followed by one of these. As such, we 782 * can determine if the seqid# should be 783 * incremented, here. 784 */ 785 if ((i == NFSV4OP_OPEN || 786 i == NFSV4OP_OPENCONFIRM || 787 i == NFSV4OP_OPENDOWNGRADE || 788 i == NFSV4OP_CLOSE || 789 i == NFSV4OP_LOCK || 790 i == NFSV4OP_LOCKU) && 791 (j == 0 || 792 (j != NFSERR_STALECLIENTID && 793 j != NFSERR_STALESTATEID && 794 j != NFSERR_BADSTATEID && 795 j != NFSERR_BADSEQID && 796 j != NFSERR_BADXDR && 797 j != NFSERR_RESOURCE && 798 j != NFSERR_NOFILEHANDLE))) 799 nd->nd_flag |= ND_INCRSEQID; 800 /* 801 * If the first op's status is non-zero, mark 802 * that there is no more data to process. 803 */ 804 if (j) 805 nd->nd_flag |= ND_NOMOREDATA; 806 } 807 808 /* 809 * If R_DONTRECOVER is set, replace the stale error 810 * reply, so that recovery isn't initiated. 811 */ 812 if ((nd->nd_repstat == NFSERR_STALECLIENTID || 813 nd->nd_repstat == NFSERR_STALESTATEID) && 814 rep != NULL && (rep->r_flags & R_DONTRECOVER)) 815 nd->nd_repstat = NFSERR_STALEDONTRECOVER; 816 } 817 } 818 819 #ifdef KDTRACE_HOOKS 820 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) { 821 uint32_t probe_id; 822 int probe_procnum; 823 824 if (nd->nd_flag & ND_NFSV4) { 825 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum]; 826 probe_procnum = nd->nd_procnum; 827 } else if (nd->nd_flag & ND_NFSV3) { 828 probe_id = nfscl_nfs3_done_probes[procnum]; 829 probe_procnum = procnum; 830 } else { 831 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum]; 832 probe_procnum = procnum; 833 } 834 if (probe_id != 0) 835 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp, 836 nd->nd_mreq, cred, probe_procnum, 0); 837 } 838 #endif 839 840 m_freem(nd->nd_mreq); 841 AUTH_DESTROY(auth); 842 if (rep != NULL) 843 FREE((caddr_t)rep, M_NFSDREQ); 844 if (set_sigset) 845 newnfs_restore_sigmask(td, &oldset); 846 return (0); 847 nfsmout: 848 mbuf_freem(nd->nd_mrep); 849 mbuf_freem(nd->nd_mreq); 850 AUTH_DESTROY(auth); 851 if (rep != NULL) 852 FREE((caddr_t)rep, M_NFSDREQ); 853 if (set_sigset) 854 newnfs_restore_sigmask(td, &oldset); 855 return (error); 856 } 857 858 /* 859 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and 860 * wait for all requests to complete. This is used by forced unmounts 861 * to terminate any outstanding RPCs. 862 */ 863 int 864 newnfs_nmcancelreqs(struct nfsmount *nmp) 865 { 866 867 if (nmp->nm_sockreq.nr_client != NULL) 868 CLNT_CLOSE(nmp->nm_sockreq.nr_client); 869 return (0); 870 } 871 872 /* 873 * Any signal that can interrupt an NFS operation in an intr mount 874 * should be added to this set. SIGSTOP and SIGKILL cannot be masked. 875 */ 876 int newnfs_sig_set[] = { 877 SIGINT, 878 SIGTERM, 879 SIGHUP, 880 SIGKILL, 881 SIGSTOP, 882 SIGQUIT 883 }; 884 885 /* 886 * Check to see if one of the signals in our subset is pending on 887 * the process (in an intr mount). 888 */ 889 static int 890 nfs_sig_pending(sigset_t set) 891 { 892 int i; 893 894 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) 895 if (SIGISMEMBER(set, newnfs_sig_set[i])) 896 return (1); 897 return (0); 898 } 899 900 /* 901 * The set/restore sigmask functions are used to (temporarily) overwrite 902 * the process p_sigmask during an RPC call (for example). These are also 903 * used in other places in the NFS client that might tsleep(). 904 */ 905 void 906 newnfs_set_sigmask(struct thread *td, sigset_t *oldset) 907 { 908 sigset_t newset; 909 int i; 910 struct proc *p; 911 912 SIGFILLSET(newset); 913 if (td == NULL) 914 td = curthread; /* XXX */ 915 p = td->td_proc; 916 /* Remove the NFS set of signals from newset */ 917 PROC_LOCK(p); 918 mtx_lock(&p->p_sigacts->ps_mtx); 919 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) { 920 /* 921 * But make sure we leave the ones already masked 922 * by the process, ie. remove the signal from the 923 * temporary signalmask only if it wasn't already 924 * in p_sigmask. 925 */ 926 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && 927 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) 928 SIGDELSET(newset, newnfs_sig_set[i]); 929 } 930 mtx_unlock(&p->p_sigacts->ps_mtx); 931 PROC_UNLOCK(p); 932 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0); 933 } 934 935 void 936 newnfs_restore_sigmask(struct thread *td, sigset_t *set) 937 { 938 if (td == NULL) 939 td = curthread; /* XXX */ 940 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); 941 } 942 943 /* 944 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the 945 * old one after msleep() returns. 946 */ 947 int 948 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) 949 { 950 sigset_t oldset; 951 int error; 952 struct proc *p; 953 954 if ((priority & PCATCH) == 0) 955 return msleep(ident, mtx, priority, wmesg, timo); 956 if (td == NULL) 957 td = curthread; /* XXX */ 958 newnfs_set_sigmask(td, &oldset); 959 error = msleep(ident, mtx, priority, wmesg, timo); 960 newnfs_restore_sigmask(td, &oldset); 961 p = td->td_proc; 962 return (error); 963 } 964 965 /* 966 * Test for a termination condition pending on the process. 967 * This is used for NFSMNT_INT mounts. 968 */ 969 int 970 newnfs_sigintr(struct nfsmount *nmp, struct thread *td) 971 { 972 struct proc *p; 973 sigset_t tmpset; 974 975 /* Terminate all requests while attempting a forced unmount. */ 976 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) 977 return (EIO); 978 if (!(nmp->nm_flag & NFSMNT_INT)) 979 return (0); 980 if (td == NULL) 981 return (0); 982 p = td->td_proc; 983 PROC_LOCK(p); 984 tmpset = p->p_siglist; 985 SIGSETOR(tmpset, td->td_siglist); 986 SIGSETNAND(tmpset, td->td_sigmask); 987 mtx_lock(&p->p_sigacts->ps_mtx); 988 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); 989 mtx_unlock(&p->p_sigacts->ps_mtx); 990 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) 991 && nfs_sig_pending(tmpset)) { 992 PROC_UNLOCK(p); 993 return (EINTR); 994 } 995 PROC_UNLOCK(p); 996 return (0); 997 } 998 999 static int 1000 nfs_msg(struct thread *td, const char *server, const char *msg, int error) 1001 { 1002 struct proc *p; 1003 1004 p = td ? td->td_proc : NULL; 1005 if (error) { 1006 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n", 1007 server, msg, error); 1008 } else { 1009 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg); 1010 } 1011 return (0); 1012 } 1013 1014 static void 1015 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, 1016 int error, int flags) 1017 { 1018 if (nmp == NULL) 1019 return; 1020 mtx_lock(&nmp->nm_mtx); 1021 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { 1022 nmp->nm_state |= NFSSTA_TIMEO; 1023 mtx_unlock(&nmp->nm_mtx); 1024 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1025 VQ_NOTRESP, 0); 1026 } else 1027 mtx_unlock(&nmp->nm_mtx); 1028 mtx_lock(&nmp->nm_mtx); 1029 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1030 nmp->nm_state |= NFSSTA_LOCKTIMEO; 1031 mtx_unlock(&nmp->nm_mtx); 1032 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1033 VQ_NOTRESPLOCK, 0); 1034 } else 1035 mtx_unlock(&nmp->nm_mtx); 1036 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); 1037 } 1038 1039 static void 1040 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, 1041 int flags, int tprintfmsg) 1042 { 1043 if (nmp == NULL) 1044 return; 1045 if (tprintfmsg) { 1046 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); 1047 } 1048 1049 mtx_lock(&nmp->nm_mtx); 1050 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { 1051 nmp->nm_state &= ~NFSSTA_TIMEO; 1052 mtx_unlock(&nmp->nm_mtx); 1053 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1054 VQ_NOTRESP, 1); 1055 } else 1056 mtx_unlock(&nmp->nm_mtx); 1057 1058 mtx_lock(&nmp->nm_mtx); 1059 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { 1060 nmp->nm_state &= ~NFSSTA_LOCKTIMEO; 1061 mtx_unlock(&nmp->nm_mtx); 1062 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, 1063 VQ_NOTRESPLOCK, 1); 1064 } else 1065 mtx_unlock(&nmp->nm_mtx); 1066 } 1067 1068