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 void *stuff, 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 error = vfs_hash_insert(vp, hash, lkflags, 290 td, &nvp, newnfs_vncmpf, nfhp); 291 if (error) 292 return (error); 293 if (nvp != NULL) { 294 *npp = VTONFS(nvp); 295 /* vfs_hash_insert() vput()'s the losing vnode */ 296 return (0); 297 } 298 *npp = np; 299 300 return (0); 301 } 302 303 /* 304 * Another variant of nfs_nget(). This one is only used by reopen. It 305 * takes almost the same args as nfs_nget(), but only succeeds if an entry 306 * exists in the cache. (Since files should already be "open" with a 307 * vnode ref cnt on the node when reopen calls this, it should always 308 * succeed.) 309 * Also, don't get a vnode lock, since it may already be locked by some 310 * other process that is handling it. This is ok, since all other threads 311 * on the client are blocked by the nfsc_lock being exclusively held by the 312 * caller of this function. 313 */ 314 int 315 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 316 struct thread *td, struct nfsnode **npp) 317 { 318 struct vnode *nvp; 319 u_int hash; 320 struct nfsfh *nfhp; 321 int error; 322 323 *npp = NULL; 324 /* For forced dismounts, just return error. */ 325 if (NFSCL_FORCEDISM(mntp)) 326 return (EINTR); 327 nfhp = malloc(sizeof (struct nfsfh) + fhsize, 328 M_NFSFH, M_WAITOK); 329 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 330 nfhp->nfh_len = fhsize; 331 332 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 333 334 /* 335 * First, try to get the vnode locked, but don't block for the lock. 336 */ 337 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 338 newnfs_vncmpf, nfhp); 339 if (error == 0 && nvp != NULL) { 340 NFSVOPUNLOCK(nvp); 341 } else if (error == EBUSY) { 342 /* 343 * It is safe so long as a vflush() with 344 * FORCECLOSE has not been done. Since the Renew thread is 345 * stopped and the MNTK_UNMOUNTF flag is set before doing 346 * a vflush() with FORCECLOSE, we should be ok here. 347 */ 348 if (NFSCL_FORCEDISM(mntp)) 349 error = EINTR; 350 else { 351 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 352 if (nvp == NULL) { 353 error = ENOENT; 354 } else if (VN_IS_DOOMED(nvp)) { 355 error = ENOENT; 356 vrele(nvp); 357 } else { 358 error = 0; 359 } 360 } 361 } 362 free(nfhp, M_NFSFH); 363 if (error) 364 return (error); 365 if (nvp != NULL) { 366 *npp = VTONFS(nvp); 367 return (0); 368 } 369 return (EINVAL); 370 } 371 372 static void 373 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 374 struct nfsvattr *newnap) 375 { 376 int off; 377 378 if (ncl_fileid_maxwarnings >= 0 && 379 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 380 return; 381 off = 0; 382 if (ncl_fileid_maxwarnings >= 0) { 383 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 384 off = 1; 385 } 386 387 printf("newnfs: server '%s' error: fileid changed. " 388 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 389 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 390 nmp->nm_com.nmcom_hostname, 391 (uintmax_t)nmp->nm_fsid[0], 392 (uintmax_t)nmp->nm_fsid[1], 393 (uintmax_t)oldnap->na_fileid, 394 (uintmax_t)newnap->na_fileid); 395 396 if (off) 397 printf("newnfs: Logged %d times about fileid corruption; " 398 "going quiet to avoid spamming logs excessively. (Limit " 399 "is: %d).\n", ncl_fileid_nwarnings, 400 ncl_fileid_maxwarnings); 401 } 402 403 void 404 ncl_copy_vattr(struct vattr *dst, struct vattr *src) 405 { 406 dst->va_type = src->va_type; 407 dst->va_mode = src->va_mode; 408 dst->va_nlink = src->va_nlink; 409 dst->va_uid = src->va_uid; 410 dst->va_gid = src->va_gid; 411 dst->va_fsid = src->va_fsid; 412 dst->va_fileid = src->va_fileid; 413 dst->va_size = src->va_size; 414 dst->va_blocksize = src->va_blocksize; 415 dst->va_atime = src->va_atime; 416 dst->va_mtime = src->va_mtime; 417 dst->va_ctime = src->va_ctime; 418 dst->va_birthtime = src->va_birthtime; 419 dst->va_gen = src->va_gen; 420 dst->va_flags = src->va_flags; 421 dst->va_rdev = src->va_rdev; 422 dst->va_bytes = src->va_bytes; 423 dst->va_filerev = src->va_filerev; 424 } 425 426 /* 427 * Load the attribute cache (that lives in the nfsnode entry) with 428 * the attributes of the second argument and 429 * Iff vaper not NULL 430 * copy the attributes to *vaper 431 * Similar to nfs_loadattrcache(), except the attributes are passed in 432 * instead of being parsed out of the mbuf list. 433 */ 434 int 435 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 436 void *stuff, int writeattr, int dontshrink) 437 { 438 struct vnode *vp = *vpp; 439 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 440 struct nfsnode *np; 441 struct nfsmount *nmp; 442 struct timespec mtime_save; 443 int error, force_fid_err; 444 dev_t topfsid; 445 446 error = 0; 447 448 /* 449 * If v_type == VNON it is a new node, so fill in the v_type, 450 * n_mtime fields. Check to see if it represents a special 451 * device, and if so, check for a possible alias. Once the 452 * correct vnode has been obtained, fill in the rest of the 453 * information. 454 */ 455 np = VTONFS(vp); 456 NFSLOCKNODE(np); 457 if (vp->v_type != nvap->va_type) { 458 vp->v_type = nvap->va_type; 459 if (vp->v_type == VFIFO) 460 vp->v_op = &newnfs_fifoops; 461 np->n_mtime = nvap->va_mtime; 462 } 463 nmp = VFSTONFS(vp->v_mount); 464 vap = &np->n_vattr.na_vattr; 465 mtime_save = vap->va_mtime; 466 if (writeattr) { 467 np->n_vattr.na_filerev = nap->na_filerev; 468 np->n_vattr.na_size = nap->na_size; 469 np->n_vattr.na_mtime = nap->na_mtime; 470 np->n_vattr.na_ctime = nap->na_ctime; 471 np->n_vattr.na_btime = nap->na_btime; 472 np->n_vattr.na_fsid = nap->na_fsid; 473 np->n_vattr.na_mode = nap->na_mode; 474 } else { 475 force_fid_err = 0; 476 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 477 force_fid_err); 478 /* 479 * BROKEN NFS SERVER OR MIDDLEWARE 480 * 481 * Certain NFS servers (certain old proprietary filers ca. 482 * 2006) or broken middleboxes (e.g. WAN accelerator products) 483 * will respond to GETATTR requests with results for a 484 * different fileid. 485 * 486 * The WAN accelerator we've observed not only serves stale 487 * cache results for a given file, it also occasionally serves 488 * results for wholly different files. This causes surprising 489 * problems; for example the cached size attribute of a file 490 * may truncate down and then back up, resulting in zero 491 * regions in file contents read by applications. We observed 492 * this reliably with Clang and .c files during parallel build. 493 * A pcap revealed packet fragmentation and GETATTR RPC 494 * responses with wholly wrong fileids. 495 */ 496 if ((np->n_vattr.na_fileid != 0 && 497 np->n_vattr.na_fileid != nap->na_fileid) || 498 force_fid_err) { 499 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 500 error = EIDRM; 501 goto out; 502 } 503 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 504 sizeof (struct nfsvattr)); 505 } 506 507 /* 508 * For NFSv4, the server's export may be a tree of file systems 509 * where a fileno is a unique value within each file system. 510 * na_filesid[0,1] uniquely identify the server file system 511 * and nm_fsid[0,1] is the value for the root file system mounted. 512 * As such, the value of va_fsid generated by vn_fsid() represents 513 * the root file system on the server and a different value for 514 * va_fsid is needed for the other server file systems. This 515 * va_fsid is ideally unique for all of the server file systems, 516 * so a 64bit hash on na_filesid[0,1] is calculated. 517 * Although highly unlikely that the fnv_64_hash() will be 518 * the same as the root, test for this case and recalculate the hash. 519 */ 520 vn_fsid(vp, vap); 521 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 522 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 523 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 524 topfsid = vap->va_fsid; 525 vap->va_fsid = FNV1_64_INIT; 526 do { 527 vap->va_fsid = fnv_64_buf(np->n_vattr.na_filesid, 528 sizeof(np->n_vattr.na_filesid), vap->va_fsid); 529 } while (vap->va_fsid == topfsid); 530 } 531 532 np->n_attrstamp = time_second; 533 if (vap->va_size != np->n_size) { 534 if (vap->va_type == VREG) { 535 if (dontshrink && vap->va_size < np->n_size) { 536 /* 537 * We've been told not to shrink the file; 538 * zero np->n_attrstamp to indicate that 539 * the attributes are stale. 540 */ 541 vap->va_size = np->n_size; 542 np->n_attrstamp = 0; 543 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 544 } else if (np->n_flag & NMODIFIED) { 545 /* 546 * We've modified the file: Use the larger 547 * of our size, and the server's size. 548 */ 549 if (vap->va_size < np->n_size) { 550 vap->va_size = np->n_size; 551 } else { 552 np->n_size = vap->va_size; 553 np->n_flag |= NSIZECHANGED; 554 } 555 } else { 556 np->n_size = vap->va_size; 557 np->n_flag |= NSIZECHANGED; 558 } 559 } else { 560 np->n_size = vap->va_size; 561 } 562 } 563 /* 564 * The following checks are added to prevent a race between (say) 565 * a READDIR+ and a WRITE. 566 * READDIR+, WRITE requests sent out. 567 * READDIR+ resp, WRITE resp received on client. 568 * However, the WRITE resp was handled before the READDIR+ resp 569 * causing the post op attrs from the write to be loaded first 570 * and the attrs from the READDIR+ to be loaded later. If this 571 * happens, we have stale attrs loaded into the attrcache. 572 * We detect this by for the mtime moving back. We invalidate the 573 * attrcache when this happens. 574 */ 575 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 576 /* Size changed or mtime went backwards */ 577 np->n_attrstamp = 0; 578 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 579 } 580 if (vaper != NULL) { 581 ncl_copy_vattr(vaper, vap); 582 if (np->n_flag & NCHG) { 583 if (np->n_flag & NACC) 584 vaper->va_atime = np->n_atim; 585 if (np->n_flag & NUPD) 586 vaper->va_mtime = np->n_mtim; 587 } 588 } 589 590 out: 591 #ifdef KDTRACE_HOOKS 592 if (np->n_attrstamp != 0) 593 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 594 #endif 595 (void)ncl_pager_setsize(vp, NULL); 596 return (error); 597 } 598 599 /* 600 * Call vnode_pager_setsize() if the size of the node changed, as 601 * recorded in nfsnode vs. v_object, or delay the call if notifying 602 * the pager is not possible at the moment. 603 * 604 * If nsizep is non-NULL, the call is delayed and the new node size is 605 * provided. Caller should itself call vnode_pager_setsize() if 606 * function returned true. If nsizep is NULL, function tries to call 607 * vnode_pager_setsize() itself if needed and possible, and the nfs 608 * node is unlocked unconditionally, the return value is not useful. 609 */ 610 bool 611 ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep) 612 { 613 struct nfsnode *np; 614 vm_object_t object; 615 struct vattr *vap; 616 u_quad_t nsize; 617 bool setnsize; 618 619 np = VTONFS(vp); 620 NFSASSERTNODE(np); 621 622 vap = &np->n_vattr.na_vattr; 623 nsize = vap->va_size; 624 object = vp->v_object; 625 setnsize = false; 626 627 if (object != NULL && nsize != object->un_pager.vnp.vnp_size) { 628 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE && 629 (curthread->td_pflags2 & TDP2_SBPAGES) == 0) 630 setnsize = true; 631 else 632 np->n_flag |= NVNSETSZSKIP; 633 } 634 if (nsizep == NULL) { 635 NFSUNLOCKNODE(np); 636 if (setnsize) 637 vnode_pager_setsize(vp, nsize); 638 setnsize = false; 639 } else { 640 *nsizep = nsize; 641 } 642 return (setnsize); 643 } 644 645 /* 646 * Fill in the client id name. For these bytes: 647 * 1 - they must be unique 648 * 2 - they should be persistent across client reboots 649 * 1 is more critical than 2 650 * Use the mount point's unique id plus either the uuid or, if that 651 * isn't set, random junk. 652 */ 653 void 654 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 655 { 656 int uuidlen; 657 658 /* 659 * First, put in the 64bit mount point identifier. 660 */ 661 if (idlen >= sizeof (u_int64_t)) { 662 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 663 cp += sizeof (u_int64_t); 664 idlen -= sizeof (u_int64_t); 665 } 666 667 /* 668 * If uuid is non-zero length, use it. 669 */ 670 uuidlen = strlen(uuid); 671 if (uuidlen > 0 && idlen >= uuidlen) { 672 NFSBCOPY(uuid, cp, uuidlen); 673 cp += uuidlen; 674 idlen -= uuidlen; 675 } 676 677 /* 678 * This only normally happens if the uuid isn't set. 679 */ 680 while (idlen > 0) { 681 *cp++ = (u_int8_t)(arc4random() % 256); 682 idlen--; 683 } 684 } 685 686 /* 687 * Fill in a lock owner name. For now, pid + the process's creation time. 688 */ 689 void 690 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 691 { 692 union { 693 u_int32_t lval; 694 u_int8_t cval[4]; 695 } tl; 696 struct proc *p; 697 698 if (id == NULL) { 699 /* Return the single open_owner of all 0 bytes. */ 700 bzero(cp, NFSV4CL_LOCKNAMELEN); 701 return; 702 } 703 if ((flags & F_POSIX) != 0) { 704 p = (struct proc *)id; 705 tl.lval = p->p_pid; 706 *cp++ = tl.cval[0]; 707 *cp++ = tl.cval[1]; 708 *cp++ = tl.cval[2]; 709 *cp++ = tl.cval[3]; 710 tl.lval = p->p_stats->p_start.tv_sec; 711 *cp++ = tl.cval[0]; 712 *cp++ = tl.cval[1]; 713 *cp++ = tl.cval[2]; 714 *cp++ = tl.cval[3]; 715 tl.lval = p->p_stats->p_start.tv_usec; 716 *cp++ = tl.cval[0]; 717 *cp++ = tl.cval[1]; 718 *cp++ = tl.cval[2]; 719 *cp = tl.cval[3]; 720 } else if ((flags & F_FLOCK) != 0) { 721 bcopy(&id, cp, sizeof(id)); 722 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 723 } else { 724 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 725 bzero(cp, NFSV4CL_LOCKNAMELEN); 726 } 727 } 728 729 /* 730 * Find the parent process for the thread passed in as an argument. 731 * If none exists, return NULL, otherwise return a thread for the parent. 732 * (Can be any of the threads, since it is only used for td->td_proc.) 733 */ 734 NFSPROC_T * 735 nfscl_getparent(struct thread *td) 736 { 737 struct proc *p; 738 struct thread *ptd; 739 740 if (td == NULL) 741 return (NULL); 742 p = td->td_proc; 743 if (p->p_pid == 0) 744 return (NULL); 745 p = p->p_pptr; 746 if (p == NULL) 747 return (NULL); 748 ptd = TAILQ_FIRST(&p->p_threads); 749 return (ptd); 750 } 751 752 /* 753 * Start up the renew kernel thread. 754 */ 755 static void 756 start_nfscl(void *arg) 757 { 758 struct nfsclclient *clp; 759 struct thread *td; 760 761 clp = (struct nfsclclient *)arg; 762 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 763 nfscl_renewthread(clp, td); 764 kproc_exit(0); 765 } 766 767 void 768 nfscl_start_renewthread(struct nfsclclient *clp) 769 { 770 771 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 772 "nfscl"); 773 } 774 775 /* 776 * Handle wcc_data. 777 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 778 * as the first Op after PutFH. 779 * (For NFSv4, the postop attributes are after the Op, so they can't be 780 * parsed here. A separate call to nfscl_postop_attr() is required.) 781 */ 782 int 783 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 784 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 785 { 786 u_int32_t *tl; 787 struct nfsnode *np = VTONFS(vp); 788 struct nfsvattr nfsva; 789 int error = 0; 790 791 if (wccflagp != NULL) 792 *wccflagp = 0; 793 if (nd->nd_flag & ND_NFSV3) { 794 *flagp = 0; 795 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 796 if (*tl == newnfs_true) { 797 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 798 if (wccflagp != NULL) { 799 NFSLOCKNODE(np); 800 *wccflagp = (np->n_mtime.tv_sec == 801 fxdr_unsigned(u_int32_t, *(tl + 2)) && 802 np->n_mtime.tv_nsec == 803 fxdr_unsigned(u_int32_t, *(tl + 3))); 804 NFSUNLOCKNODE(np); 805 } 806 } 807 error = nfscl_postop_attr(nd, nap, flagp, stuff); 808 if (wccflagp != NULL && *flagp == 0) 809 *wccflagp = 0; 810 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 811 == (ND_NFSV4 | ND_V4WCCATTR)) { 812 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 813 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 814 NULL, NULL, NULL, NULL, NULL); 815 if (error) 816 return (error); 817 /* 818 * Get rid of Op# and status for next op. 819 */ 820 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 821 if (*++tl) 822 nd->nd_flag |= ND_NOMOREDATA; 823 if (wccflagp != NULL && 824 nfsva.na_vattr.va_mtime.tv_sec != 0) { 825 NFSLOCKNODE(np); 826 *wccflagp = (np->n_mtime.tv_sec == 827 nfsva.na_vattr.va_mtime.tv_sec && 828 np->n_mtime.tv_nsec == 829 nfsva.na_vattr.va_mtime.tv_sec); 830 NFSUNLOCKNODE(np); 831 } 832 } 833 nfsmout: 834 return (error); 835 } 836 837 /* 838 * Get postop attributes. 839 */ 840 int 841 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 842 void *stuff) 843 { 844 u_int32_t *tl; 845 int error = 0; 846 847 *retp = 0; 848 if (nd->nd_flag & ND_NOMOREDATA) 849 return (error); 850 if (nd->nd_flag & ND_NFSV3) { 851 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 852 *retp = fxdr_unsigned(int, *tl); 853 } else if (nd->nd_flag & ND_NFSV4) { 854 /* 855 * For NFSv4, the postop attr are at the end, so no point 856 * in looking if nd_repstat != 0. 857 */ 858 if (!nd->nd_repstat) { 859 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 860 if (*(tl + 1)) 861 /* should never happen since nd_repstat != 0 */ 862 nd->nd_flag |= ND_NOMOREDATA; 863 else 864 *retp = 1; 865 } 866 } else if (!nd->nd_repstat) { 867 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 868 *retp = 1; 869 } 870 if (*retp) { 871 error = nfsm_loadattr(nd, nap); 872 if (error) 873 *retp = 0; 874 } 875 nfsmout: 876 return (error); 877 } 878 879 /* 880 * nfscl_request() - mostly a wrapper for newnfs_request(). 881 */ 882 int 883 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 884 struct ucred *cred, void *stuff) 885 { 886 int ret, vers; 887 struct nfsmount *nmp; 888 889 nmp = VFSTONFS(vp->v_mount); 890 if (nd->nd_flag & ND_NFSV4) 891 vers = NFS_VER4; 892 else if (nd->nd_flag & ND_NFSV3) 893 vers = NFS_VER3; 894 else 895 vers = NFS_VER2; 896 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 897 NFS_PROG, vers, NULL, 1, NULL, NULL); 898 return (ret); 899 } 900 901 /* 902 * fill in this bsden's variant of statfs using nfsstatfs. 903 */ 904 void 905 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 906 { 907 struct statfs *sbp = (struct statfs *)statfs; 908 909 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 910 sbp->f_bsize = NFS_FABLKSIZE; 911 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 912 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 913 /* 914 * Although sf_abytes is uint64_t and f_bavail is int64_t, 915 * the value after dividing by NFS_FABLKSIZE is small 916 * enough that it will fit in 63bits, so it is ok to 917 * assign it to f_bavail without fear that it will become 918 * negative. 919 */ 920 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 921 sbp->f_files = sfp->sf_tfiles; 922 /* Since f_ffree is int64_t, clip it to 63bits. */ 923 if (sfp->sf_ffiles > INT64_MAX) 924 sbp->f_ffree = INT64_MAX; 925 else 926 sbp->f_ffree = sfp->sf_ffiles; 927 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 928 /* 929 * The type casts to (int32_t) ensure that this code is 930 * compatible with the old NFS client, in that it will 931 * propagate bit31 to the high order bits. This may or may 932 * not be correct for NFSv2, but since it is a legacy 933 * environment, I'd rather retain backwards compatibility. 934 */ 935 sbp->f_bsize = (int32_t)sfp->sf_bsize; 936 sbp->f_blocks = (int32_t)sfp->sf_blocks; 937 sbp->f_bfree = (int32_t)sfp->sf_bfree; 938 sbp->f_bavail = (int32_t)sfp->sf_bavail; 939 sbp->f_files = 0; 940 sbp->f_ffree = 0; 941 } 942 } 943 944 /* 945 * Use the fsinfo stuff to update the mount point. 946 */ 947 void 948 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 949 { 950 951 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 952 fsp->fs_wtpref >= NFS_FABLKSIZE) 953 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 954 ~(NFS_FABLKSIZE - 1); 955 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 956 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 957 if (nmp->nm_wsize == 0) 958 nmp->nm_wsize = fsp->fs_wtmax; 959 } 960 if (nmp->nm_wsize < NFS_FABLKSIZE) 961 nmp->nm_wsize = NFS_FABLKSIZE; 962 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 963 fsp->fs_rtpref >= NFS_FABLKSIZE) 964 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 965 ~(NFS_FABLKSIZE - 1); 966 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 967 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 968 if (nmp->nm_rsize == 0) 969 nmp->nm_rsize = fsp->fs_rtmax; 970 } 971 if (nmp->nm_rsize < NFS_FABLKSIZE) 972 nmp->nm_rsize = NFS_FABLKSIZE; 973 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 974 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 975 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 976 ~(NFS_DIRBLKSIZ - 1); 977 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 978 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 979 if (nmp->nm_readdirsize == 0) 980 nmp->nm_readdirsize = fsp->fs_rtmax; 981 } 982 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 983 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 984 if (fsp->fs_maxfilesize > 0 && 985 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 986 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 987 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 988 nmp->nm_state |= NFSSTA_GOTFSINFO; 989 } 990 991 /* 992 * Lookups source address which should be used to communicate with 993 * @nmp and stores it inside @pdst. 994 * 995 * Returns 0 on success. 996 */ 997 u_int8_t * 998 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 999 { 1000 #if defined(INET6) || defined(INET) 1001 int fibnum; 1002 1003 fibnum = curthread->td_proc->p_fibnum; 1004 #endif 1005 #ifdef INET 1006 if (nmp->nm_nam->sa_family == AF_INET) { 1007 struct epoch_tracker et; 1008 struct nhop_object *nh; 1009 struct sockaddr_in *sin; 1010 struct in_addr addr = {}; 1011 1012 sin = (struct sockaddr_in *)nmp->nm_nam; 1013 NET_EPOCH_ENTER(et); 1014 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1015 nh = fib4_lookup(fibnum, sin->sin_addr, 0, NHR_NONE, 0); 1016 CURVNET_RESTORE(); 1017 if (nh != NULL) 1018 addr = IA_SIN(ifatoia(nh->nh_ifa))->sin_addr; 1019 NET_EPOCH_EXIT(et); 1020 if (nh == NULL) 1021 return (NULL); 1022 1023 if (IN_LOOPBACK(ntohl(addr.s_addr))) { 1024 /* Ignore loopback addresses */ 1025 return (NULL); 1026 } 1027 1028 *isinet6p = 0; 1029 *((struct in_addr *)paddr) = addr; 1030 1031 return (u_int8_t *)paddr; 1032 } 1033 #endif 1034 #ifdef INET6 1035 if (nmp->nm_nam->sa_family == AF_INET6) { 1036 struct epoch_tracker et; 1037 struct sockaddr_in6 *sin6; 1038 int error; 1039 1040 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1041 1042 NET_EPOCH_ENTER(et); 1043 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1044 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1045 sin6->sin6_scope_id, NULL, paddr, NULL); 1046 CURVNET_RESTORE(); 1047 NET_EPOCH_EXIT(et); 1048 if (error != 0) 1049 return (NULL); 1050 1051 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1052 return (NULL); 1053 1054 /* Scope is embedded in */ 1055 *isinet6p = 1; 1056 1057 return (u_int8_t *)paddr; 1058 } 1059 #endif 1060 return (NULL); 1061 } 1062 1063 /* 1064 * Copy NFS uid, gids from the cred structure. 1065 */ 1066 void 1067 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1068 { 1069 int i; 1070 1071 KASSERT(cr->cr_ngroups >= 0, 1072 ("newnfs_copyincred: negative cr_ngroups")); 1073 nfscr->nfsc_uid = cr->cr_uid; 1074 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1075 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1076 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1077 } 1078 1079 /* 1080 * Do any client specific initialization. 1081 */ 1082 void 1083 nfscl_init(void) 1084 { 1085 static int inited = 0; 1086 1087 if (inited) 1088 return; 1089 inited = 1; 1090 nfscl_inited = 1; 1091 ncl_pbuf_zone = pbuf_zsecond_create("nfspbuf", nswbuf / 2); 1092 } 1093 1094 /* 1095 * Check each of the attributes to be set, to ensure they aren't already 1096 * the correct value. Disable setting ones already correct. 1097 */ 1098 int 1099 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1100 { 1101 1102 if (vap->va_mode != (mode_t)VNOVAL) { 1103 if (vap->va_mode == nvap->na_mode) 1104 vap->va_mode = (mode_t)VNOVAL; 1105 } 1106 if (vap->va_uid != (uid_t)VNOVAL) { 1107 if (vap->va_uid == nvap->na_uid) 1108 vap->va_uid = (uid_t)VNOVAL; 1109 } 1110 if (vap->va_gid != (gid_t)VNOVAL) { 1111 if (vap->va_gid == nvap->na_gid) 1112 vap->va_gid = (gid_t)VNOVAL; 1113 } 1114 if (vap->va_size != VNOVAL) { 1115 if (vap->va_size == nvap->na_size) 1116 vap->va_size = VNOVAL; 1117 } 1118 1119 /* 1120 * We are normally called with only a partially initialized 1121 * VAP. Since the NFSv3 spec says that server may use the 1122 * file attributes to store the verifier, the spec requires 1123 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1124 * in atime, but we can't really assume that all servers will 1125 * so we ensure that our SETATTR sets both atime and mtime. 1126 * Set the VA_UTIMES_NULL flag for this case, so that 1127 * the server's time will be used. This is needed to 1128 * work around a bug in some Solaris servers, where 1129 * setting the time TOCLIENT causes the Setattr RPC 1130 * to return NFS_OK, but not set va_mode. 1131 */ 1132 if (vap->va_mtime.tv_sec == VNOVAL) { 1133 vfs_timestamp(&vap->va_mtime); 1134 vap->va_vaflags |= VA_UTIMES_NULL; 1135 } 1136 if (vap->va_atime.tv_sec == VNOVAL) 1137 vap->va_atime = vap->va_mtime; 1138 return (1); 1139 } 1140 1141 /* 1142 * Map nfsv4 errors to errno.h errors. 1143 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1144 * error should only be returned for the Open, Create and Setattr Ops. 1145 * As such, most calls can just pass in 0 for those arguments. 1146 */ 1147 int 1148 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1149 { 1150 struct proc *p; 1151 1152 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1153 return (error); 1154 if (td != NULL) 1155 p = td->td_proc; 1156 else 1157 p = NULL; 1158 switch (error) { 1159 case NFSERR_BADOWNER: 1160 tprintf(p, LOG_INFO, 1161 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1162 uid, gid); 1163 return (EPERM); 1164 case NFSERR_BADNAME: 1165 case NFSERR_BADCHAR: 1166 printf("nfsv4 char/name not handled by server\n"); 1167 return (ENOENT); 1168 case NFSERR_STALECLIENTID: 1169 case NFSERR_STALESTATEID: 1170 case NFSERR_EXPIRED: 1171 case NFSERR_BADSTATEID: 1172 case NFSERR_BADSESSION: 1173 printf("nfsv4 recover err returned %d\n", error); 1174 return (EIO); 1175 case NFSERR_BADHANDLE: 1176 case NFSERR_SERVERFAULT: 1177 case NFSERR_BADTYPE: 1178 case NFSERR_FHEXPIRED: 1179 case NFSERR_RESOURCE: 1180 case NFSERR_MOVED: 1181 case NFSERR_NOFILEHANDLE: 1182 case NFSERR_MINORVERMISMATCH: 1183 case NFSERR_OLDSTATEID: 1184 case NFSERR_BADSEQID: 1185 case NFSERR_LEASEMOVED: 1186 case NFSERR_RECLAIMBAD: 1187 case NFSERR_BADXDR: 1188 case NFSERR_OPILLEGAL: 1189 printf("nfsv4 client/server protocol prob err=%d\n", 1190 error); 1191 return (EIO); 1192 default: 1193 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1194 return (EIO); 1195 }; 1196 } 1197 1198 /* 1199 * Check to see if the process for this owner exists. Return 1 if it doesn't 1200 * and 0 otherwise. 1201 */ 1202 int 1203 nfscl_procdoesntexist(u_int8_t *own) 1204 { 1205 union { 1206 u_int32_t lval; 1207 u_int8_t cval[4]; 1208 } tl; 1209 struct proc *p; 1210 pid_t pid; 1211 int i, ret = 0; 1212 1213 /* For the single open_owner of all 0 bytes, just return 0. */ 1214 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1215 if (own[i] != 0) 1216 break; 1217 if (i == NFSV4CL_LOCKNAMELEN) 1218 return (0); 1219 1220 tl.cval[0] = *own++; 1221 tl.cval[1] = *own++; 1222 tl.cval[2] = *own++; 1223 tl.cval[3] = *own++; 1224 pid = tl.lval; 1225 p = pfind_any_locked(pid); 1226 if (p == NULL) 1227 return (1); 1228 if (p->p_stats == NULL) { 1229 PROC_UNLOCK(p); 1230 return (0); 1231 } 1232 tl.cval[0] = *own++; 1233 tl.cval[1] = *own++; 1234 tl.cval[2] = *own++; 1235 tl.cval[3] = *own++; 1236 if (tl.lval != p->p_stats->p_start.tv_sec) { 1237 ret = 1; 1238 } else { 1239 tl.cval[0] = *own++; 1240 tl.cval[1] = *own++; 1241 tl.cval[2] = *own++; 1242 tl.cval[3] = *own; 1243 if (tl.lval != p->p_stats->p_start.tv_usec) 1244 ret = 1; 1245 } 1246 PROC_UNLOCK(p); 1247 return (ret); 1248 } 1249 1250 /* 1251 * - nfs pseudo system call for the client 1252 */ 1253 /* 1254 * MPSAFE 1255 */ 1256 static int 1257 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1258 { 1259 struct file *fp; 1260 struct nfscbd_args nfscbdarg; 1261 struct nfsd_nfscbd_args nfscbdarg2; 1262 struct nameidata nd; 1263 struct nfscl_dumpmntopts dumpmntopts; 1264 cap_rights_t rights; 1265 char *buf; 1266 int error; 1267 struct mount *mp; 1268 struct nfsmount *nmp; 1269 1270 if (uap->flag & NFSSVC_CBADDSOCK) { 1271 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1272 if (error) 1273 return (error); 1274 /* 1275 * Since we don't know what rights might be required, 1276 * pretend that we need them all. It is better to be too 1277 * careful than too reckless. 1278 */ 1279 error = fget(td, nfscbdarg.sock, 1280 cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp); 1281 if (error) 1282 return (error); 1283 if (fp->f_type != DTYPE_SOCKET) { 1284 fdrop(fp, td); 1285 return (EPERM); 1286 } 1287 error = nfscbd_addsock(fp); 1288 fdrop(fp, td); 1289 if (!error && nfscl_enablecallb == 0) { 1290 nfsv4_cbport = nfscbdarg.port; 1291 nfscl_enablecallb = 1; 1292 } 1293 } else if (uap->flag & NFSSVC_NFSCBD) { 1294 if (uap->argp == NULL) 1295 return (EINVAL); 1296 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1297 sizeof(nfscbdarg2)); 1298 if (error) 1299 return (error); 1300 error = nfscbd_nfsd(td, &nfscbdarg2); 1301 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1302 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1303 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1304 dumpmntopts.ndmnt_blen > 1024)) 1305 error = EINVAL; 1306 if (error == 0) 1307 error = nfsrv_lookupfilename(&nd, 1308 dumpmntopts.ndmnt_fname, td); 1309 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1310 "nfs") != 0) { 1311 vput(nd.ni_vp); 1312 error = EINVAL; 1313 } 1314 if (error == 0) { 1315 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK | 1316 M_ZERO); 1317 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1318 dumpmntopts.ndmnt_blen); 1319 vput(nd.ni_vp); 1320 error = copyout(buf, dumpmntopts.ndmnt_buf, 1321 dumpmntopts.ndmnt_blen); 1322 free(buf, M_TEMP); 1323 } 1324 } else if (uap->flag & NFSSVC_FORCEDISM) { 1325 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1326 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1327 if (error == 0) { 1328 nmp = NULL; 1329 mtx_lock(&mountlist_mtx); 1330 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1331 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1332 0 && strcmp(mp->mnt_stat.f_fstypename, 1333 "nfs") == 0 && mp->mnt_data != NULL) { 1334 nmp = VFSTONFS(mp); 1335 NFSDDSLOCK(); 1336 if (nfsv4_findmirror(nmp) != NULL) { 1337 NFSDDSUNLOCK(); 1338 error = ENXIO; 1339 nmp = NULL; 1340 break; 1341 } 1342 mtx_lock(&nmp->nm_mtx); 1343 if ((nmp->nm_privflag & 1344 NFSMNTP_FORCEDISM) == 0) { 1345 nmp->nm_privflag |= 1346 (NFSMNTP_FORCEDISM | 1347 NFSMNTP_CANCELRPCS); 1348 mtx_unlock(&nmp->nm_mtx); 1349 } else { 1350 mtx_unlock(&nmp->nm_mtx); 1351 nmp = NULL; 1352 } 1353 NFSDDSUNLOCK(); 1354 break; 1355 } 1356 } 1357 mtx_unlock(&mountlist_mtx); 1358 1359 if (nmp != NULL) { 1360 /* 1361 * Call newnfs_nmcancelreqs() to cause 1362 * any RPCs in progress on the mount point to 1363 * fail. 1364 * This will cause any process waiting for an 1365 * RPC to complete while holding a vnode lock 1366 * on the mounted-on vnode (such as "df" or 1367 * a non-forced "umount") to fail. 1368 * This will unlock the mounted-on vnode so 1369 * a forced dismount can succeed. 1370 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1371 * so that nfs_unmount() can complete. 1372 */ 1373 newnfs_nmcancelreqs(nmp); 1374 mtx_lock(&nmp->nm_mtx); 1375 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1376 wakeup(nmp); 1377 mtx_unlock(&nmp->nm_mtx); 1378 } else if (error == 0) 1379 error = EINVAL; 1380 } 1381 free(buf, M_TEMP); 1382 } else { 1383 error = EINVAL; 1384 } 1385 return (error); 1386 } 1387 1388 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1389 1390 /* 1391 * Called once to initialize data structures... 1392 */ 1393 static int 1394 nfscl_modevent(module_t mod, int type, void *data) 1395 { 1396 int error = 0; 1397 static int loaded = 0; 1398 1399 switch (type) { 1400 case MOD_LOAD: 1401 if (loaded) 1402 return (0); 1403 newnfs_portinit(); 1404 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1405 nfscl_init(); 1406 NFSD_LOCK(); 1407 nfsrvd_cbinit(0); 1408 NFSD_UNLOCK(); 1409 ncl_call_invalcaches = ncl_invalcaches; 1410 nfsd_call_nfscl = nfssvc_nfscl; 1411 loaded = 1; 1412 break; 1413 1414 case MOD_UNLOAD: 1415 if (nfs_numnfscbd != 0) { 1416 error = EBUSY; 1417 break; 1418 } 1419 1420 /* 1421 * XXX: Unloading of nfscl module is unsupported. 1422 */ 1423 #if 0 1424 ncl_call_invalcaches = NULL; 1425 nfsd_call_nfscl = NULL; 1426 uma_zdestroy(ncl_pbuf_zone); 1427 /* and get rid of the mutexes */ 1428 mtx_destroy(&ncl_iod_mutex); 1429 loaded = 0; 1430 break; 1431 #else 1432 /* FALLTHROUGH */ 1433 #endif 1434 default: 1435 error = EOPNOTSUPP; 1436 break; 1437 } 1438 return error; 1439 } 1440 static moduledata_t nfscl_mod = { 1441 "nfscl", 1442 nfscl_modevent, 1443 NULL, 1444 }; 1445 /* 1446 * This is the main module declaration for the NFS client. The 1447 * nfscl_modevent() function is needed to ensure that the module 1448 * cannot be unloaded, among other things. 1449 * There is also a module declaration in sys/fs/nfsclient/nfs_clvfsops.c 1450 * for the name "nfs" within the VFS_SET() macro that defines the "nfs" 1451 * file system type. 1452 */ 1453 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1454 1455 /* So that loader and kldload(2) can find us, wherever we are.. */ 1456 MODULE_VERSION(nfscl, 1); 1457 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1458 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1459 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1460 MODULE_DEPEND(nfscl, xdr, 1, 1, 1); 1461