1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 42 #include <sys/capsicum.h> 43 44 /* 45 * generally, I don't like #includes inside .h files, but it seems to 46 * be the easiest way to handle the port. 47 */ 48 #include <sys/fail.h> 49 #include <sys/hash.h> 50 #include <sys/sysctl.h> 51 #include <fs/nfs/nfsport.h> 52 #include <netinet/in_fib.h> 53 #include <netinet/if_ether.h> 54 #include <netinet6/ip6_var.h> 55 #include <net/if_types.h> 56 #include <net/route/nhop.h> 57 58 #include <fs/nfsclient/nfs_kdtrace.h> 59 60 #ifdef KDTRACE_HOOKS 61 dtrace_nfsclient_attrcache_flush_probe_func_t 62 dtrace_nfscl_attrcache_flush_done_probe; 63 uint32_t nfscl_attrcache_flush_done_id; 64 65 dtrace_nfsclient_attrcache_get_hit_probe_func_t 66 dtrace_nfscl_attrcache_get_hit_probe; 67 uint32_t nfscl_attrcache_get_hit_id; 68 69 dtrace_nfsclient_attrcache_get_miss_probe_func_t 70 dtrace_nfscl_attrcache_get_miss_probe; 71 uint32_t nfscl_attrcache_get_miss_id; 72 73 dtrace_nfsclient_attrcache_load_probe_func_t 74 dtrace_nfscl_attrcache_load_done_probe; 75 uint32_t nfscl_attrcache_load_done_id; 76 #endif /* !KDTRACE_HOOKS */ 77 78 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 79 extern struct vop_vector newnfs_vnodeops; 80 extern struct vop_vector newnfs_fifoops; 81 extern uma_zone_t newnfsnode_zone; 82 extern struct buf_ops buf_ops_newnfs; 83 extern uma_zone_t ncl_pbuf_zone; 84 extern short nfsv4_cbport; 85 extern int nfscl_enablecallb; 86 extern int nfs_numnfscbd; 87 extern int nfscl_inited; 88 struct mtx ncl_iod_mutex; 89 NFSDLOCKMUTEX; 90 extern struct mtx nfsrv_dslock_mtx; 91 92 extern void (*ncl_call_invalcaches)(struct vnode *); 93 94 SYSCTL_DECL(_vfs_nfs); 95 static int ncl_fileid_maxwarnings = 10; 96 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN, 97 &ncl_fileid_maxwarnings, 0, 98 "Limit fileid corruption warnings; 0 is off; -1 is unlimited"); 99 static volatile int ncl_fileid_nwarnings; 100 101 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *, 102 struct nfsvattr *); 103 104 /* 105 * Comparison function for vfs_hash functions. 106 */ 107 int 108 newnfs_vncmpf(struct vnode *vp, void *arg) 109 { 110 struct nfsfh *nfhp = (struct nfsfh *)arg; 111 struct nfsnode *np = VTONFS(vp); 112 113 if (np->n_fhp->nfh_len != nfhp->nfh_len || 114 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 115 return (1); 116 return (0); 117 } 118 119 /* 120 * Look up a vnode/nfsnode by file handle. 121 * Callers must check for mount points!! 122 * In all cases, a pointer to a 123 * nfsnode structure is returned. 124 * This variant takes a "struct nfsfh *" as second argument and uses 125 * that structure up, either by hanging off the nfsnode or FREEing it. 126 */ 127 int 128 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 129 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 130 int lkflags) 131 { 132 struct nfsnode *np, *dnp; 133 struct vnode *vp, *nvp; 134 struct nfsv4node *newd, *oldd; 135 int error; 136 u_int hash; 137 struct nfsmount *nmp; 138 139 nmp = VFSTONFS(mntp); 140 dnp = VTONFS(dvp); 141 *npp = NULL; 142 143 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 144 145 error = vfs_hash_get(mntp, hash, lkflags, 146 td, &nvp, newnfs_vncmpf, nfhp); 147 if (error == 0 && nvp != NULL) { 148 /* 149 * I believe there is a slight chance that vgonel() could 150 * get called on this vnode between when NFSVOPLOCK() drops 151 * the VI_LOCK() and vget() acquires it again, so that it 152 * hasn't yet had v_usecount incremented. If this were to 153 * happen, the VIRF_DOOMED flag would be set, so check for 154 * that here. Since we now have the v_usecount incremented, 155 * we should be ok until we vrele() it, if the VIRF_DOOMED 156 * flag isn't set now. 157 */ 158 VI_LOCK(nvp); 159 if (VN_IS_DOOMED(nvp)) { 160 VI_UNLOCK(nvp); 161 vrele(nvp); 162 error = ENOENT; 163 } else { 164 VI_UNLOCK(nvp); 165 } 166 } 167 if (error) { 168 free(nfhp, M_NFSFH); 169 return (error); 170 } 171 if (nvp != NULL) { 172 np = VTONFS(nvp); 173 /* 174 * For NFSv4, check to see if it is the same name and 175 * replace the name, if it is different. 176 */ 177 oldd = newd = NULL; 178 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 179 nvp->v_type == VREG && 180 (np->n_v4->n4_namelen != cnp->cn_namelen || 181 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 182 cnp->cn_namelen) || 183 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 184 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 185 dnp->n_fhp->nfh_len))) { 186 newd = malloc( 187 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 188 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 189 NFSLOCKNODE(np); 190 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 191 && (np->n_v4->n4_namelen != cnp->cn_namelen || 192 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 193 cnp->cn_namelen) || 194 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 195 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 196 dnp->n_fhp->nfh_len))) { 197 oldd = np->n_v4; 198 np->n_v4 = newd; 199 newd = NULL; 200 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 201 np->n_v4->n4_namelen = cnp->cn_namelen; 202 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 203 dnp->n_fhp->nfh_len); 204 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 205 cnp->cn_namelen); 206 } 207 NFSUNLOCKNODE(np); 208 } 209 if (newd != NULL) 210 free(newd, M_NFSV4NODE); 211 if (oldd != NULL) 212 free(oldd, M_NFSV4NODE); 213 *npp = np; 214 free(nfhp, M_NFSFH); 215 return (0); 216 } 217 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 218 219 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 220 if (error) { 221 uma_zfree(newnfsnode_zone, np); 222 free(nfhp, M_NFSFH); 223 return (error); 224 } 225 vp = nvp; 226 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 227 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 228 vp->v_data = np; 229 np->n_vnode = vp; 230 /* 231 * Initialize the mutex even if the vnode is going to be a loser. 232 * This simplifies the logic in reclaim, which can then unconditionally 233 * destroy the mutex (in the case of the loser, or if hash_insert 234 * happened to return an error no special casing is needed). 235 */ 236 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 237 lockinit(&np->n_excl, PVFS, "nfsupg", VLKTIMEOUT, LK_NOSHARE | 238 LK_CANRECURSE); 239 240 /* 241 * Are we getting the root? If so, make sure the vnode flags 242 * are correct 243 */ 244 if ((nfhp->nfh_len == nmp->nm_fhsize) && 245 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 246 if (vp->v_type == VNON) 247 vp->v_type = VDIR; 248 vp->v_vflag |= VV_ROOT; 249 } 250 251 vp->v_vflag |= VV_VMSIZEVNLOCK; 252 253 np->n_fhp = nfhp; 254 /* 255 * For NFSv4, we have to attach the directory file handle and 256 * file name, so that Open Ops can be done later. 257 */ 258 if (nmp->nm_flag & NFSMNT_NFSV4) { 259 np->n_v4 = malloc(sizeof (struct nfsv4node) 260 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 261 M_WAITOK); 262 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 263 np->n_v4->n4_namelen = cnp->cn_namelen; 264 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 265 dnp->n_fhp->nfh_len); 266 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 267 cnp->cn_namelen); 268 } else { 269 np->n_v4 = NULL; 270 } 271 272 /* 273 * NFS supports recursive and shared locking. 274 */ 275 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 276 VN_LOCK_AREC(vp); 277 VN_LOCK_ASHARE(vp); 278 error = insmntque(vp, mntp); 279 if (error != 0) { 280 *npp = NULL; 281 mtx_destroy(&np->n_mtx); 282 lockdestroy(&np->n_excl); 283 free(nfhp, M_NFSFH); 284 if (np->n_v4 != NULL) 285 free(np->n_v4, M_NFSV4NODE); 286 uma_zfree(newnfsnode_zone, np); 287 return (error); 288 } 289 vn_set_state(vp, VSTATE_CONSTRUCTED); 290 error = vfs_hash_insert(vp, hash, lkflags, 291 td, &nvp, newnfs_vncmpf, nfhp); 292 if (error) 293 return (error); 294 if (nvp != NULL) { 295 *npp = VTONFS(nvp); 296 /* vfs_hash_insert() vput()'s the losing vnode */ 297 return (0); 298 } 299 *npp = np; 300 301 return (0); 302 } 303 304 /* 305 * Another variant of nfs_nget(). This one is only used by reopen. It 306 * takes almost the same args as nfs_nget(), but only succeeds if an entry 307 * exists in the cache. (Since files should already be "open" with a 308 * vnode ref cnt on the node when reopen calls this, it should always 309 * succeed.) 310 * Also, don't get a vnode lock, since it may already be locked by some 311 * other process that is handling it. This is ok, since all other threads 312 * on the client are blocked by the nfsc_lock being exclusively held by the 313 * caller of this function. 314 */ 315 int 316 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 317 struct thread *td, struct nfsnode **npp) 318 { 319 struct vnode *nvp; 320 u_int hash; 321 struct nfsfh *nfhp; 322 int error; 323 324 *npp = NULL; 325 /* For forced dismounts, just return error. */ 326 if (NFSCL_FORCEDISM(mntp)) 327 return (EINTR); 328 nfhp = malloc(sizeof (struct nfsfh) + fhsize, 329 M_NFSFH, M_WAITOK); 330 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 331 nfhp->nfh_len = fhsize; 332 333 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 334 335 /* 336 * First, try to get the vnode locked, but don't block for the lock. 337 */ 338 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 339 newnfs_vncmpf, nfhp); 340 if (error == 0 && nvp != NULL) { 341 NFSVOPUNLOCK(nvp); 342 } else if (error == EBUSY) { 343 /* 344 * It is safe so long as a vflush() with 345 * FORCECLOSE has not been done. Since the Renew thread is 346 * stopped and the MNTK_UNMOUNTF flag is set before doing 347 * a vflush() with FORCECLOSE, we should be ok here. 348 */ 349 if (NFSCL_FORCEDISM(mntp)) 350 error = EINTR; 351 else { 352 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 353 if (nvp == NULL) { 354 error = ENOENT; 355 } else if (VN_IS_DOOMED(nvp)) { 356 error = ENOENT; 357 vrele(nvp); 358 } else { 359 error = 0; 360 } 361 } 362 } 363 free(nfhp, M_NFSFH); 364 if (error) 365 return (error); 366 if (nvp != NULL) { 367 *npp = VTONFS(nvp); 368 return (0); 369 } 370 return (EINVAL); 371 } 372 373 static void 374 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 375 struct nfsvattr *newnap) 376 { 377 int off; 378 379 if (ncl_fileid_maxwarnings >= 0 && 380 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 381 return; 382 off = 0; 383 if (ncl_fileid_maxwarnings >= 0) { 384 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 385 off = 1; 386 } 387 388 printf("newnfs: server '%s' error: fileid changed. " 389 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 390 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 391 nmp->nm_com.nmcom_hostname, 392 (uintmax_t)nmp->nm_fsid[0], 393 (uintmax_t)nmp->nm_fsid[1], 394 (uintmax_t)oldnap->na_fileid, 395 (uintmax_t)newnap->na_fileid); 396 397 if (off) 398 printf("newnfs: Logged %d times about fileid corruption; " 399 "going quiet to avoid spamming logs excessively. (Limit " 400 "is: %d).\n", ncl_fileid_nwarnings, 401 ncl_fileid_maxwarnings); 402 } 403 404 void 405 ncl_copy_vattr(struct vattr *dst, struct vattr *src) 406 { 407 dst->va_type = src->va_type; 408 dst->va_mode = src->va_mode; 409 dst->va_nlink = src->va_nlink; 410 dst->va_uid = src->va_uid; 411 dst->va_gid = src->va_gid; 412 dst->va_fsid = src->va_fsid; 413 dst->va_fileid = src->va_fileid; 414 dst->va_size = src->va_size; 415 dst->va_blocksize = src->va_blocksize; 416 dst->va_atime = src->va_atime; 417 dst->va_mtime = src->va_mtime; 418 dst->va_ctime = src->va_ctime; 419 dst->va_birthtime = src->va_birthtime; 420 dst->va_gen = src->va_gen; 421 dst->va_flags = src->va_flags; 422 dst->va_rdev = src->va_rdev; 423 dst->va_bytes = src->va_bytes; 424 dst->va_filerev = src->va_filerev; 425 } 426 427 /* 428 * Load the attribute cache (that lives in the nfsnode entry) with 429 * the attributes of the second argument and 430 * Iff vaper not NULL 431 * copy the attributes to *vaper 432 * Similar to nfs_loadattrcache(), except the attributes are passed in 433 * instead of being parsed out of the mbuf list. 434 */ 435 int 436 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 437 int writeattr, int dontshrink) 438 { 439 struct vnode *vp = *vpp; 440 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 441 struct nfsnode *np; 442 struct nfsmount *nmp; 443 struct timespec mtime_save; 444 int error, force_fid_err; 445 dev_t topfsid; 446 447 error = 0; 448 449 /* 450 * If v_type == VNON it is a new node, so fill in the v_type, 451 * n_mtime fields. Check to see if it represents a special 452 * device, and if so, check for a possible alias. Once the 453 * correct vnode has been obtained, fill in the rest of the 454 * information. 455 */ 456 np = VTONFS(vp); 457 NFSLOCKNODE(np); 458 if (vp->v_type != nvap->va_type) { 459 vp->v_type = nvap->va_type; 460 if (vp->v_type == VFIFO) 461 vp->v_op = &newnfs_fifoops; 462 np->n_mtime = nvap->va_mtime; 463 } 464 nmp = VFSTONFS(vp->v_mount); 465 vap = &np->n_vattr.na_vattr; 466 mtime_save = vap->va_mtime; 467 if (writeattr) { 468 np->n_vattr.na_filerev = nap->na_filerev; 469 np->n_vattr.na_size = nap->na_size; 470 np->n_vattr.na_mtime = nap->na_mtime; 471 np->n_vattr.na_ctime = nap->na_ctime; 472 np->n_vattr.na_btime = nap->na_btime; 473 np->n_vattr.na_fsid = nap->na_fsid; 474 np->n_vattr.na_mode = nap->na_mode; 475 } else { 476 force_fid_err = 0; 477 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 478 force_fid_err); 479 /* 480 * BROKEN NFS SERVER OR MIDDLEWARE 481 * 482 * Certain NFS servers (certain old proprietary filers ca. 483 * 2006) or broken middleboxes (e.g. WAN accelerator products) 484 * will respond to GETATTR requests with results for a 485 * different fileid. 486 * 487 * The WAN accelerator we've observed not only serves stale 488 * cache results for a given file, it also occasionally serves 489 * results for wholly different files. This causes surprising 490 * problems; for example the cached size attribute of a file 491 * may truncate down and then back up, resulting in zero 492 * regions in file contents read by applications. We observed 493 * this reliably with Clang and .c files during parallel build. 494 * A pcap revealed packet fragmentation and GETATTR RPC 495 * responses with wholly wrong fileids. 496 */ 497 if ((np->n_vattr.na_fileid != 0 && 498 np->n_vattr.na_fileid != nap->na_fileid) || 499 force_fid_err) { 500 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 501 error = EIDRM; 502 goto out; 503 } 504 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 505 sizeof (struct nfsvattr)); 506 } 507 508 /* 509 * For NFSv4, the server's export may be a tree of file systems 510 * where a fileno is a unique value within each file system. 511 * na_filesid[0,1] uniquely identify the server file system 512 * and nm_fsid[0,1] is the value for the root file system mounted. 513 * As such, the value of va_fsid generated by vn_fsid() represents 514 * the root file system on the server and a different value for 515 * va_fsid is needed for the other server file systems. This 516 * va_fsid is ideally unique for all of the server file systems, 517 * so a 64bit hash on na_filesid[0,1] is calculated. 518 * Although highly unlikely that the fnv_64_hash() will be 519 * the same as the root, test for this case and recalculate the hash. 520 */ 521 vn_fsid(vp, vap); 522 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 523 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 524 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 525 topfsid = vap->va_fsid; 526 vap->va_fsid = FNV1_64_INIT; 527 do { 528 vap->va_fsid = fnv_64_buf(np->n_vattr.na_filesid, 529 sizeof(np->n_vattr.na_filesid), vap->va_fsid); 530 } while (vap->va_fsid == topfsid); 531 } 532 533 np->n_attrstamp = time_second; 534 if (vap->va_size != np->n_size) { 535 if (vap->va_type == VREG) { 536 if (dontshrink && vap->va_size < np->n_size) { 537 /* 538 * We've been told not to shrink the file; 539 * zero np->n_attrstamp to indicate that 540 * the attributes are stale. 541 */ 542 vap->va_size = np->n_size; 543 np->n_attrstamp = 0; 544 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 545 } else if (np->n_flag & NMODIFIED) { 546 /* 547 * We've modified the file: Use the larger 548 * of our size, and the server's size. 549 */ 550 if (vap->va_size < np->n_size) { 551 vap->va_size = np->n_size; 552 } else { 553 np->n_size = vap->va_size; 554 np->n_flag |= NSIZECHANGED; 555 } 556 } else { 557 np->n_size = vap->va_size; 558 np->n_flag |= NSIZECHANGED; 559 } 560 } else { 561 np->n_size = vap->va_size; 562 } 563 } 564 /* 565 * The following checks are added to prevent a race between (say) 566 * a READDIR+ and a WRITE. 567 * READDIR+, WRITE requests sent out. 568 * READDIR+ resp, WRITE resp received on client. 569 * However, the WRITE resp was handled before the READDIR+ resp 570 * causing the post op attrs from the write to be loaded first 571 * and the attrs from the READDIR+ to be loaded later. If this 572 * happens, we have stale attrs loaded into the attrcache. 573 * We detect this by for the mtime moving back. We invalidate the 574 * attrcache when this happens. 575 */ 576 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 577 /* Size changed or mtime went backwards */ 578 np->n_attrstamp = 0; 579 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 580 } 581 if (vaper != NULL) { 582 ncl_copy_vattr(vaper, vap); 583 if (np->n_flag & NCHG) { 584 if (np->n_flag & NACC) 585 vaper->va_atime = np->n_atim; 586 if (np->n_flag & NUPD) 587 vaper->va_mtime = np->n_mtim; 588 } 589 } 590 591 out: 592 #ifdef KDTRACE_HOOKS 593 if (np->n_attrstamp != 0) 594 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 595 #endif 596 (void)ncl_pager_setsize(vp, NULL); 597 return (error); 598 } 599 600 /* 601 * Call vnode_pager_setsize() if the size of the node changed, as 602 * recorded in nfsnode vs. v_object, or delay the call if notifying 603 * the pager is not possible at the moment. 604 * 605 * If nsizep is non-NULL, the call is delayed and the new node size is 606 * provided. Caller should itself call vnode_pager_setsize() if 607 * function returned true. If nsizep is NULL, function tries to call 608 * vnode_pager_setsize() itself if needed and possible, and the nfs 609 * node is unlocked unconditionally, the return value is not useful. 610 */ 611 bool 612 ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep) 613 { 614 struct nfsnode *np; 615 vm_object_t object; 616 struct vattr *vap; 617 u_quad_t nsize; 618 bool setnsize; 619 620 np = VTONFS(vp); 621 NFSASSERTNODE(np); 622 623 vap = &np->n_vattr.na_vattr; 624 nsize = vap->va_size; 625 object = vp->v_object; 626 setnsize = false; 627 628 if (object != NULL && nsize != object->un_pager.vnp.vnp_size) { 629 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE && 630 (curthread->td_pflags2 & TDP2_SBPAGES) == 0) 631 setnsize = true; 632 else 633 np->n_flag |= NVNSETSZSKIP; 634 } 635 if (nsizep == NULL) { 636 NFSUNLOCKNODE(np); 637 if (setnsize) 638 vnode_pager_setsize(vp, nsize); 639 setnsize = false; 640 } else { 641 *nsizep = nsize; 642 } 643 return (setnsize); 644 } 645 646 /* 647 * Fill in the client id name. For these bytes: 648 * 1 - they must be unique 649 * 2 - they should be persistent across client reboots 650 * 1 is more critical than 2 651 * Use the mount point's unique id plus either the uuid or, if that 652 * isn't set, random junk. 653 */ 654 void 655 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 656 { 657 int uuidlen; 658 659 /* 660 * First, put in the 64bit mount point identifier. 661 */ 662 if (idlen >= sizeof (u_int64_t)) { 663 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 664 cp += sizeof (u_int64_t); 665 idlen -= sizeof (u_int64_t); 666 } 667 668 /* 669 * If uuid is non-zero length, use it. 670 */ 671 uuidlen = strlen(uuid); 672 if (uuidlen > 0 && idlen >= uuidlen) { 673 NFSBCOPY(uuid, cp, uuidlen); 674 cp += uuidlen; 675 idlen -= uuidlen; 676 } 677 678 /* 679 * This only normally happens if the uuid isn't set. 680 */ 681 while (idlen > 0) { 682 *cp++ = (u_int8_t)(arc4random() % 256); 683 idlen--; 684 } 685 } 686 687 /* 688 * Fill in a lock owner name. For now, pid + the process's creation time. 689 */ 690 void 691 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 692 { 693 union { 694 u_int32_t lval; 695 u_int8_t cval[4]; 696 } tl; 697 struct proc *p; 698 699 if (id == NULL) { 700 /* Return the single open_owner of all 0 bytes. */ 701 bzero(cp, NFSV4CL_LOCKNAMELEN); 702 return; 703 } 704 if ((flags & F_POSIX) != 0) { 705 p = (struct proc *)id; 706 tl.lval = p->p_pid; 707 *cp++ = tl.cval[0]; 708 *cp++ = tl.cval[1]; 709 *cp++ = tl.cval[2]; 710 *cp++ = tl.cval[3]; 711 tl.lval = p->p_stats->p_start.tv_sec; 712 *cp++ = tl.cval[0]; 713 *cp++ = tl.cval[1]; 714 *cp++ = tl.cval[2]; 715 *cp++ = tl.cval[3]; 716 tl.lval = p->p_stats->p_start.tv_usec; 717 *cp++ = tl.cval[0]; 718 *cp++ = tl.cval[1]; 719 *cp++ = tl.cval[2]; 720 *cp = tl.cval[3]; 721 } else if ((flags & F_FLOCK) != 0) { 722 bcopy(&id, cp, sizeof(id)); 723 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 724 } else { 725 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 726 bzero(cp, NFSV4CL_LOCKNAMELEN); 727 } 728 } 729 730 /* 731 * Find the parent process for the thread passed in as an argument. 732 * If none exists, return NULL, otherwise return a thread for the parent. 733 * (Can be any of the threads, since it is only used for td->td_proc.) 734 */ 735 NFSPROC_T * 736 nfscl_getparent(struct thread *td) 737 { 738 struct proc *p; 739 struct thread *ptd; 740 741 if (td == NULL) 742 return (NULL); 743 p = td->td_proc; 744 if (p->p_pid == 0) 745 return (NULL); 746 p = p->p_pptr; 747 if (p == NULL) 748 return (NULL); 749 ptd = TAILQ_FIRST(&p->p_threads); 750 return (ptd); 751 } 752 753 /* 754 * Start up the renew kernel thread. 755 */ 756 static void 757 start_nfscl(void *arg) 758 { 759 struct nfsclclient *clp; 760 struct thread *td; 761 762 clp = (struct nfsclclient *)arg; 763 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 764 nfscl_renewthread(clp, td); 765 kproc_exit(0); 766 } 767 768 void 769 nfscl_start_renewthread(struct nfsclclient *clp) 770 { 771 772 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 773 "nfscl"); 774 } 775 776 /* 777 * Handle wcc_data. 778 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 779 * as the first Op after PutFH. 780 * (For NFSv4, the postop attributes are after the Op, so they can't be 781 * parsed here. A separate call to nfscl_postop_attr() is required.) 782 */ 783 int 784 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 785 struct nfsvattr *nap, int *flagp, int *wccflagp, uint64_t *repsizep) 786 { 787 u_int32_t *tl; 788 struct nfsnode *np = VTONFS(vp); 789 struct nfsvattr nfsva; 790 int error = 0; 791 792 if (wccflagp != NULL) 793 *wccflagp = 0; 794 if (nd->nd_flag & ND_NFSV3) { 795 *flagp = 0; 796 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 797 if (*tl == newnfs_true) { 798 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 799 if (wccflagp != NULL) { 800 NFSLOCKNODE(np); 801 *wccflagp = (np->n_mtime.tv_sec == 802 fxdr_unsigned(u_int32_t, *(tl + 2)) && 803 np->n_mtime.tv_nsec == 804 fxdr_unsigned(u_int32_t, *(tl + 3))); 805 NFSUNLOCKNODE(np); 806 } 807 } 808 error = nfscl_postop_attr(nd, nap, flagp); 809 if (wccflagp != NULL && *flagp == 0) 810 *wccflagp = 0; 811 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 812 == (ND_NFSV4 | ND_V4WCCATTR)) { 813 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 814 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 815 NULL, NULL, NULL, NULL, NULL); 816 if (error) 817 return (error); 818 /* 819 * Get rid of Op# and status for next op. 820 */ 821 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 822 if (*++tl) 823 nd->nd_flag |= ND_NOMOREDATA; 824 if (repsizep != NULL) 825 *repsizep = nfsva.na_size; 826 if (wccflagp != NULL && 827 nfsva.na_vattr.va_mtime.tv_sec != 0) { 828 NFSLOCKNODE(np); 829 *wccflagp = (np->n_mtime.tv_sec == 830 nfsva.na_vattr.va_mtime.tv_sec && 831 np->n_mtime.tv_nsec == 832 nfsva.na_vattr.va_mtime.tv_sec); 833 NFSUNLOCKNODE(np); 834 } 835 } 836 nfsmout: 837 return (error); 838 } 839 840 /* 841 * Get postop attributes. 842 */ 843 int 844 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp) 845 { 846 u_int32_t *tl; 847 int error = 0; 848 849 *retp = 0; 850 if (nd->nd_flag & ND_NOMOREDATA) 851 return (error); 852 if (nd->nd_flag & ND_NFSV3) { 853 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 854 *retp = fxdr_unsigned(int, *tl); 855 } else if (nd->nd_flag & ND_NFSV4) { 856 /* 857 * For NFSv4, the postop attr are at the end, so no point 858 * in looking if nd_repstat != 0. 859 */ 860 if (!nd->nd_repstat) { 861 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 862 if (*(tl + 1)) 863 /* should never happen since nd_repstat != 0 */ 864 nd->nd_flag |= ND_NOMOREDATA; 865 else 866 *retp = 1; 867 } 868 } else if (!nd->nd_repstat) { 869 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 870 *retp = 1; 871 } 872 if (*retp) { 873 error = nfsm_loadattr(nd, nap); 874 if (error) 875 *retp = 0; 876 } 877 nfsmout: 878 return (error); 879 } 880 881 /* 882 * nfscl_request() - mostly a wrapper for newnfs_request(). 883 */ 884 int 885 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 886 struct ucred *cred) 887 { 888 int ret, vers; 889 struct nfsmount *nmp; 890 891 nmp = VFSTONFS(vp->v_mount); 892 if (nd->nd_flag & ND_NFSV4) 893 vers = NFS_VER4; 894 else if (nd->nd_flag & ND_NFSV3) 895 vers = NFS_VER3; 896 else 897 vers = NFS_VER2; 898 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 899 NFS_PROG, vers, NULL, 1, NULL, NULL); 900 return (ret); 901 } 902 903 /* 904 * fill in this bsden's variant of statfs using nfsstatfs. 905 */ 906 void 907 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 908 { 909 struct statfs *sbp = (struct statfs *)statfs; 910 911 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 912 sbp->f_bsize = NFS_FABLKSIZE; 913 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 914 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 915 /* 916 * Although sf_abytes is uint64_t and f_bavail is int64_t, 917 * the value after dividing by NFS_FABLKSIZE is small 918 * enough that it will fit in 63bits, so it is ok to 919 * assign it to f_bavail without fear that it will become 920 * negative. 921 */ 922 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 923 sbp->f_files = sfp->sf_tfiles; 924 /* Since f_ffree is int64_t, clip it to 63bits. */ 925 if (sfp->sf_ffiles > INT64_MAX) 926 sbp->f_ffree = INT64_MAX; 927 else 928 sbp->f_ffree = sfp->sf_ffiles; 929 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 930 /* 931 * The type casts to (int32_t) ensure that this code is 932 * compatible with the old NFS client, in that it will 933 * propagate bit31 to the high order bits. This may or may 934 * not be correct for NFSv2, but since it is a legacy 935 * environment, I'd rather retain backwards compatibility. 936 */ 937 sbp->f_bsize = (int32_t)sfp->sf_bsize; 938 sbp->f_blocks = (int32_t)sfp->sf_blocks; 939 sbp->f_bfree = (int32_t)sfp->sf_bfree; 940 sbp->f_bavail = (int32_t)sfp->sf_bavail; 941 sbp->f_files = 0; 942 sbp->f_ffree = 0; 943 } 944 } 945 946 /* 947 * Use the fsinfo stuff to update the mount point. 948 */ 949 void 950 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 951 { 952 953 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 954 fsp->fs_wtpref >= NFS_FABLKSIZE) 955 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 956 ~(NFS_FABLKSIZE - 1); 957 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 958 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 959 if (nmp->nm_wsize == 0) 960 nmp->nm_wsize = fsp->fs_wtmax; 961 } 962 if (nmp->nm_wsize < NFS_FABLKSIZE) 963 nmp->nm_wsize = NFS_FABLKSIZE; 964 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 965 fsp->fs_rtpref >= NFS_FABLKSIZE) 966 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 967 ~(NFS_FABLKSIZE - 1); 968 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 969 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 970 if (nmp->nm_rsize == 0) 971 nmp->nm_rsize = fsp->fs_rtmax; 972 } 973 if (nmp->nm_rsize < NFS_FABLKSIZE) 974 nmp->nm_rsize = NFS_FABLKSIZE; 975 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 976 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 977 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 978 ~(NFS_DIRBLKSIZ - 1); 979 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 980 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 981 if (nmp->nm_readdirsize == 0) 982 nmp->nm_readdirsize = fsp->fs_rtmax; 983 } 984 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 985 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 986 if (fsp->fs_maxfilesize > 0 && 987 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 988 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 989 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 990 nmp->nm_state |= NFSSTA_GOTFSINFO; 991 } 992 993 /* 994 * Lookups source address which should be used to communicate with 995 * @nmp and stores it inside @pdst. 996 * 997 * Returns 0 on success. 998 */ 999 u_int8_t * 1000 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 1001 { 1002 #if defined(INET6) || defined(INET) 1003 int fibnum; 1004 1005 fibnum = curthread->td_proc->p_fibnum; 1006 #endif 1007 #ifdef INET 1008 if (nmp->nm_nam->sa_family == AF_INET) { 1009 struct epoch_tracker et; 1010 struct nhop_object *nh; 1011 struct sockaddr_in *sin; 1012 struct in_addr addr = {}; 1013 1014 sin = (struct sockaddr_in *)nmp->nm_nam; 1015 NET_EPOCH_ENTER(et); 1016 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1017 nh = fib4_lookup(fibnum, sin->sin_addr, 0, NHR_NONE, 0); 1018 if (nh != NULL) { 1019 addr = IA_SIN(ifatoia(nh->nh_ifa))->sin_addr; 1020 if (IN_LOOPBACK(ntohl(addr.s_addr))) { 1021 /* Ignore loopback addresses */ 1022 nh = NULL; 1023 } 1024 } 1025 CURVNET_RESTORE(); 1026 NET_EPOCH_EXIT(et); 1027 1028 if (nh == NULL) 1029 return (NULL); 1030 *isinet6p = 0; 1031 *((struct in_addr *)paddr) = addr; 1032 1033 return (u_int8_t *)paddr; 1034 } 1035 #endif 1036 #ifdef INET6 1037 if (nmp->nm_nam->sa_family == AF_INET6) { 1038 struct epoch_tracker et; 1039 struct sockaddr_in6 *sin6; 1040 int error; 1041 1042 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1043 1044 NET_EPOCH_ENTER(et); 1045 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1046 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1047 sin6->sin6_scope_id, NULL, paddr, NULL); 1048 CURVNET_RESTORE(); 1049 NET_EPOCH_EXIT(et); 1050 if (error != 0) 1051 return (NULL); 1052 1053 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1054 return (NULL); 1055 1056 /* Scope is embedded in */ 1057 *isinet6p = 1; 1058 1059 return (u_int8_t *)paddr; 1060 } 1061 #endif 1062 return (NULL); 1063 } 1064 1065 /* 1066 * Copy NFS uid, gids from the cred structure. 1067 */ 1068 void 1069 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1070 { 1071 int i; 1072 1073 KASSERT(cr->cr_ngroups >= 0, 1074 ("newnfs_copyincred: negative cr_ngroups")); 1075 nfscr->nfsc_uid = cr->cr_uid; 1076 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1077 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1078 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1079 } 1080 1081 /* 1082 * Do any client specific initialization. 1083 */ 1084 void 1085 nfscl_init(void) 1086 { 1087 static int inited = 0; 1088 1089 if (inited) 1090 return; 1091 inited = 1; 1092 nfscl_inited = 1; 1093 ncl_pbuf_zone = pbuf_zsecond_create("nfspbuf", nswbuf / 2); 1094 } 1095 1096 /* 1097 * Check each of the attributes to be set, to ensure they aren't already 1098 * the correct value. Disable setting ones already correct. 1099 */ 1100 int 1101 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1102 { 1103 1104 if (vap->va_mode != (mode_t)VNOVAL) { 1105 if (vap->va_mode == nvap->na_mode) 1106 vap->va_mode = (mode_t)VNOVAL; 1107 } 1108 if (vap->va_uid != (uid_t)VNOVAL) { 1109 if (vap->va_uid == nvap->na_uid) 1110 vap->va_uid = (uid_t)VNOVAL; 1111 } 1112 if (vap->va_gid != (gid_t)VNOVAL) { 1113 if (vap->va_gid == nvap->na_gid) 1114 vap->va_gid = (gid_t)VNOVAL; 1115 } 1116 if (vap->va_size != VNOVAL) { 1117 if (vap->va_size == nvap->na_size) 1118 vap->va_size = VNOVAL; 1119 } 1120 1121 /* 1122 * We are normally called with only a partially initialized 1123 * VAP. Since the NFSv3 spec says that server may use the 1124 * file attributes to store the verifier, the spec requires 1125 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1126 * in atime, but we can't really assume that all servers will 1127 * so we ensure that our SETATTR sets both atime and mtime. 1128 * Set the VA_UTIMES_NULL flag for this case, so that 1129 * the server's time will be used. This is needed to 1130 * work around a bug in some Solaris servers, where 1131 * setting the time TOCLIENT causes the Setattr RPC 1132 * to return NFS_OK, but not set va_mode. 1133 */ 1134 if (vap->va_mtime.tv_sec == VNOVAL) { 1135 vfs_timestamp(&vap->va_mtime); 1136 vap->va_vaflags |= VA_UTIMES_NULL; 1137 } 1138 if (vap->va_atime.tv_sec == VNOVAL) 1139 vap->va_atime = vap->va_mtime; 1140 return (1); 1141 } 1142 1143 /* 1144 * Map nfsv4 errors to errno.h errors. 1145 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1146 * error should only be returned for the Open, Create and Setattr Ops. 1147 * As such, most calls can just pass in 0 for those arguments. 1148 */ 1149 int 1150 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1151 { 1152 struct proc *p; 1153 1154 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1155 return (error); 1156 if (td != NULL) 1157 p = td->td_proc; 1158 else 1159 p = NULL; 1160 switch (error) { 1161 case NFSERR_BADOWNER: 1162 tprintf(p, LOG_INFO, 1163 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1164 uid, gid); 1165 return (EPERM); 1166 case NFSERR_BADNAME: 1167 case NFSERR_BADCHAR: 1168 printf("nfsv4 char/name not handled by server\n"); 1169 return (ENOENT); 1170 case NFSERR_STALECLIENTID: 1171 case NFSERR_STALESTATEID: 1172 case NFSERR_EXPIRED: 1173 case NFSERR_BADSTATEID: 1174 case NFSERR_BADSESSION: 1175 printf("nfsv4 recover err returned %d\n", error); 1176 return (EIO); 1177 case NFSERR_BADHANDLE: 1178 case NFSERR_SERVERFAULT: 1179 case NFSERR_BADTYPE: 1180 case NFSERR_FHEXPIRED: 1181 case NFSERR_RESOURCE: 1182 case NFSERR_MOVED: 1183 case NFSERR_MINORVERMISMATCH: 1184 case NFSERR_OLDSTATEID: 1185 case NFSERR_BADSEQID: 1186 case NFSERR_LEASEMOVED: 1187 case NFSERR_RECLAIMBAD: 1188 case NFSERR_BADXDR: 1189 case NFSERR_OPILLEGAL: 1190 printf("nfsv4 client/server protocol prob err=%d\n", 1191 error); 1192 return (EIO); 1193 case NFSERR_NOFILEHANDLE: 1194 printf("nfsv4 no file handle: usually means the file " 1195 "system is not exported on the NFSv4 server\n"); 1196 return (EIO); 1197 case NFSERR_WRONGSEC: 1198 tprintf(p, LOG_INFO, "NFSv4 error WrongSec: You probably need a" 1199 " Kerberos TGT\n"); 1200 return (EIO); 1201 default: 1202 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1203 return (EIO); 1204 }; 1205 } 1206 1207 /* 1208 * Check to see if the process for this owner exists. Return 1 if it doesn't 1209 * and 0 otherwise. 1210 */ 1211 int 1212 nfscl_procdoesntexist(u_int8_t *own) 1213 { 1214 union { 1215 u_int32_t lval; 1216 u_int8_t cval[4]; 1217 } tl; 1218 struct proc *p; 1219 pid_t pid; 1220 int i, ret = 0; 1221 1222 /* For the single open_owner of all 0 bytes, just return 0. */ 1223 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1224 if (own[i] != 0) 1225 break; 1226 if (i == NFSV4CL_LOCKNAMELEN) 1227 return (0); 1228 1229 tl.cval[0] = *own++; 1230 tl.cval[1] = *own++; 1231 tl.cval[2] = *own++; 1232 tl.cval[3] = *own++; 1233 pid = tl.lval; 1234 p = pfind_any_locked(pid); 1235 if (p == NULL) 1236 return (1); 1237 if (p->p_stats == NULL) { 1238 PROC_UNLOCK(p); 1239 return (0); 1240 } 1241 tl.cval[0] = *own++; 1242 tl.cval[1] = *own++; 1243 tl.cval[2] = *own++; 1244 tl.cval[3] = *own++; 1245 if (tl.lval != p->p_stats->p_start.tv_sec) { 1246 ret = 1; 1247 } else { 1248 tl.cval[0] = *own++; 1249 tl.cval[1] = *own++; 1250 tl.cval[2] = *own++; 1251 tl.cval[3] = *own; 1252 if (tl.lval != p->p_stats->p_start.tv_usec) 1253 ret = 1; 1254 } 1255 PROC_UNLOCK(p); 1256 return (ret); 1257 } 1258 1259 /* 1260 * - nfs pseudo system call for the client 1261 */ 1262 /* 1263 * MPSAFE 1264 */ 1265 static int 1266 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1267 { 1268 struct file *fp; 1269 struct nfscbd_args nfscbdarg; 1270 struct nfsd_nfscbd_args nfscbdarg2; 1271 struct nameidata nd; 1272 struct nfscl_dumpmntopts dumpmntopts; 1273 cap_rights_t rights; 1274 char *buf; 1275 int error; 1276 struct mount *mp; 1277 struct nfsmount *nmp; 1278 1279 if (uap->flag & NFSSVC_CBADDSOCK) { 1280 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1281 if (error) 1282 return (error); 1283 /* 1284 * Since we don't know what rights might be required, 1285 * pretend that we need them all. It is better to be too 1286 * careful than too reckless. 1287 */ 1288 error = fget(td, nfscbdarg.sock, 1289 cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp); 1290 if (error) 1291 return (error); 1292 if (fp->f_type != DTYPE_SOCKET) { 1293 fdrop(fp, td); 1294 return (EPERM); 1295 } 1296 error = nfscbd_addsock(fp); 1297 fdrop(fp, td); 1298 if (!error && nfscl_enablecallb == 0) { 1299 nfsv4_cbport = nfscbdarg.port; 1300 nfscl_enablecallb = 1; 1301 } 1302 } else if (uap->flag & NFSSVC_NFSCBD) { 1303 if (uap->argp == NULL) 1304 return (EINVAL); 1305 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1306 sizeof(nfscbdarg2)); 1307 if (error) 1308 return (error); 1309 error = nfscbd_nfsd(td, &nfscbdarg2); 1310 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1311 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1312 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1313 dumpmntopts.ndmnt_blen > 1024)) 1314 error = EINVAL; 1315 if (error == 0) 1316 error = nfsrv_lookupfilename(&nd, 1317 dumpmntopts.ndmnt_fname, td); 1318 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1319 "nfs") != 0) { 1320 vput(nd.ni_vp); 1321 error = EINVAL; 1322 } 1323 if (error == 0) { 1324 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK | 1325 M_ZERO); 1326 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1327 dumpmntopts.ndmnt_blen); 1328 vput(nd.ni_vp); 1329 error = copyout(buf, dumpmntopts.ndmnt_buf, 1330 dumpmntopts.ndmnt_blen); 1331 free(buf, M_TEMP); 1332 } 1333 } else if (uap->flag & NFSSVC_FORCEDISM) { 1334 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1335 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1336 if (error == 0) { 1337 nmp = NULL; 1338 mtx_lock(&mountlist_mtx); 1339 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1340 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1341 0 && strcmp(mp->mnt_stat.f_fstypename, 1342 "nfs") == 0 && mp->mnt_data != NULL) { 1343 nmp = VFSTONFS(mp); 1344 NFSDDSLOCK(); 1345 if (nfsv4_findmirror(nmp) != NULL) { 1346 NFSDDSUNLOCK(); 1347 error = ENXIO; 1348 nmp = NULL; 1349 break; 1350 } 1351 mtx_lock(&nmp->nm_mtx); 1352 if ((nmp->nm_privflag & 1353 NFSMNTP_FORCEDISM) == 0) { 1354 nmp->nm_privflag |= 1355 (NFSMNTP_FORCEDISM | 1356 NFSMNTP_CANCELRPCS); 1357 mtx_unlock(&nmp->nm_mtx); 1358 } else { 1359 mtx_unlock(&nmp->nm_mtx); 1360 nmp = NULL; 1361 } 1362 NFSDDSUNLOCK(); 1363 break; 1364 } 1365 } 1366 mtx_unlock(&mountlist_mtx); 1367 1368 if (nmp != NULL) { 1369 /* 1370 * Call newnfs_nmcancelreqs() to cause 1371 * any RPCs in progress on the mount point to 1372 * fail. 1373 * This will cause any process waiting for an 1374 * RPC to complete while holding a vnode lock 1375 * on the mounted-on vnode (such as "df" or 1376 * a non-forced "umount") to fail. 1377 * This will unlock the mounted-on vnode so 1378 * a forced dismount can succeed. 1379 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1380 * so that nfs_unmount() can complete. 1381 */ 1382 newnfs_nmcancelreqs(nmp); 1383 mtx_lock(&nmp->nm_mtx); 1384 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1385 wakeup(nmp); 1386 mtx_unlock(&nmp->nm_mtx); 1387 } else if (error == 0) 1388 error = EINVAL; 1389 } 1390 free(buf, M_TEMP); 1391 } else { 1392 error = EINVAL; 1393 } 1394 return (error); 1395 } 1396 1397 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1398 1399 /* 1400 * Called once to initialize data structures... 1401 */ 1402 static int 1403 nfscl_modevent(module_t mod, int type, void *data) 1404 { 1405 int error = 0; 1406 static int loaded = 0; 1407 1408 switch (type) { 1409 case MOD_LOAD: 1410 if (loaded) 1411 return (0); 1412 newnfs_portinit(); 1413 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1414 nfscl_init(); 1415 NFSD_LOCK(); 1416 nfsrvd_cbinit(0); 1417 NFSD_UNLOCK(); 1418 ncl_call_invalcaches = ncl_invalcaches; 1419 nfsd_call_nfscl = nfssvc_nfscl; 1420 loaded = 1; 1421 break; 1422 1423 case MOD_UNLOAD: 1424 if (nfs_numnfscbd != 0) { 1425 error = EBUSY; 1426 break; 1427 } 1428 1429 /* 1430 * XXX: Unloading of nfscl module is unsupported. 1431 */ 1432 #if 0 1433 ncl_call_invalcaches = NULL; 1434 nfsd_call_nfscl = NULL; 1435 uma_zdestroy(ncl_pbuf_zone); 1436 /* and get rid of the mutexes */ 1437 mtx_destroy(&ncl_iod_mutex); 1438 loaded = 0; 1439 break; 1440 #else 1441 /* FALLTHROUGH */ 1442 #endif 1443 default: 1444 error = EOPNOTSUPP; 1445 break; 1446 } 1447 return error; 1448 } 1449 static moduledata_t nfscl_mod = { 1450 "nfscl", 1451 nfscl_modevent, 1452 NULL, 1453 }; 1454 /* 1455 * This is the main module declaration for the NFS client. The 1456 * nfscl_modevent() function is needed to ensure that the module 1457 * cannot be unloaded, among other things. 1458 * There is also a module declaration in sys/fs/nfsclient/nfs_clvfsops.c 1459 * for the name "nfs" within the VFS_SET() macro that defines the "nfs" 1460 * file system type. 1461 */ 1462 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1463 1464 /* So that loader and kldload(2) can find us, wherever we are.. */ 1465 MODULE_VERSION(nfscl, 1); 1466 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1467 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1468 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1469 MODULE_DEPEND(nfscl, xdr, 1, 1, 1); 1470