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 57 #include <fs/nfsclient/nfs_kdtrace.h> 58 59 #ifdef KDTRACE_HOOKS 60 dtrace_nfsclient_attrcache_flush_probe_func_t 61 dtrace_nfscl_attrcache_flush_done_probe; 62 uint32_t nfscl_attrcache_flush_done_id; 63 64 dtrace_nfsclient_attrcache_get_hit_probe_func_t 65 dtrace_nfscl_attrcache_get_hit_probe; 66 uint32_t nfscl_attrcache_get_hit_id; 67 68 dtrace_nfsclient_attrcache_get_miss_probe_func_t 69 dtrace_nfscl_attrcache_get_miss_probe; 70 uint32_t nfscl_attrcache_get_miss_id; 71 72 dtrace_nfsclient_attrcache_load_probe_func_t 73 dtrace_nfscl_attrcache_load_done_probe; 74 uint32_t nfscl_attrcache_load_done_id; 75 #endif /* !KDTRACE_HOOKS */ 76 77 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 78 extern struct vop_vector newnfs_vnodeops; 79 extern struct vop_vector newnfs_fifoops; 80 extern uma_zone_t newnfsnode_zone; 81 extern struct buf_ops buf_ops_newnfs; 82 extern uma_zone_t ncl_pbuf_zone; 83 extern short nfsv4_cbport; 84 extern int nfscl_enablecallb; 85 extern int nfs_numnfscbd; 86 extern int nfscl_inited; 87 struct mtx ncl_iod_mutex; 88 NFSDLOCKMUTEX; 89 extern struct mtx nfsrv_dslock_mtx; 90 91 extern void (*ncl_call_invalcaches)(struct vnode *); 92 93 SYSCTL_DECL(_vfs_nfs); 94 static int ncl_fileid_maxwarnings = 10; 95 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN, 96 &ncl_fileid_maxwarnings, 0, 97 "Limit fileid corruption warnings; 0 is off; -1 is unlimited"); 98 static volatile int ncl_fileid_nwarnings; 99 100 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *, 101 struct nfsvattr *); 102 103 /* 104 * Comparison function for vfs_hash functions. 105 */ 106 int 107 newnfs_vncmpf(struct vnode *vp, void *arg) 108 { 109 struct nfsfh *nfhp = (struct nfsfh *)arg; 110 struct nfsnode *np = VTONFS(vp); 111 112 if (np->n_fhp->nfh_len != nfhp->nfh_len || 113 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 114 return (1); 115 return (0); 116 } 117 118 /* 119 * Look up a vnode/nfsnode by file handle. 120 * Callers must check for mount points!! 121 * In all cases, a pointer to a 122 * nfsnode structure is returned. 123 * This variant takes a "struct nfsfh *" as second argument and uses 124 * that structure up, either by hanging off the nfsnode or FREEing it. 125 */ 126 int 127 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 128 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 129 void *stuff, int lkflags) 130 { 131 struct nfsnode *np, *dnp; 132 struct vnode *vp, *nvp; 133 struct nfsv4node *newd, *oldd; 134 int error; 135 u_int hash; 136 struct nfsmount *nmp; 137 138 nmp = VFSTONFS(mntp); 139 dnp = VTONFS(dvp); 140 *npp = NULL; 141 142 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 143 144 error = vfs_hash_get(mntp, hash, lkflags, 145 td, &nvp, newnfs_vncmpf, nfhp); 146 if (error == 0 && nvp != NULL) { 147 /* 148 * I believe there is a slight chance that vgonel() could 149 * get called on this vnode between when NFSVOPLOCK() drops 150 * the VI_LOCK() and vget() acquires it again, so that it 151 * hasn't yet had v_usecount incremented. If this were to 152 * happen, the VIRF_DOOMED flag would be set, so check for 153 * that here. Since we now have the v_usecount incremented, 154 * we should be ok until we vrele() it, if the VIRF_DOOMED 155 * flag isn't set now. 156 */ 157 VI_LOCK(nvp); 158 if (VN_IS_DOOMED(nvp)) { 159 VI_UNLOCK(nvp); 160 vrele(nvp); 161 error = ENOENT; 162 } else { 163 VI_UNLOCK(nvp); 164 } 165 } 166 if (error) { 167 free(nfhp, M_NFSFH); 168 return (error); 169 } 170 if (nvp != NULL) { 171 np = VTONFS(nvp); 172 /* 173 * For NFSv4, check to see if it is the same name and 174 * replace the name, if it is different. 175 */ 176 oldd = newd = NULL; 177 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 178 nvp->v_type == VREG && 179 (np->n_v4->n4_namelen != cnp->cn_namelen || 180 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 181 cnp->cn_namelen) || 182 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 183 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 184 dnp->n_fhp->nfh_len))) { 185 newd = malloc( 186 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 187 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 188 NFSLOCKNODE(np); 189 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 190 && (np->n_v4->n4_namelen != cnp->cn_namelen || 191 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 192 cnp->cn_namelen) || 193 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 194 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 195 dnp->n_fhp->nfh_len))) { 196 oldd = np->n_v4; 197 np->n_v4 = newd; 198 newd = NULL; 199 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 200 np->n_v4->n4_namelen = cnp->cn_namelen; 201 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 202 dnp->n_fhp->nfh_len); 203 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 204 cnp->cn_namelen); 205 } 206 NFSUNLOCKNODE(np); 207 } 208 if (newd != NULL) 209 free(newd, M_NFSV4NODE); 210 if (oldd != NULL) 211 free(oldd, M_NFSV4NODE); 212 *npp = np; 213 free(nfhp, M_NFSFH); 214 return (0); 215 } 216 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 217 218 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 219 if (error) { 220 uma_zfree(newnfsnode_zone, np); 221 free(nfhp, M_NFSFH); 222 return (error); 223 } 224 vp = nvp; 225 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 226 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 227 vp->v_data = np; 228 np->n_vnode = vp; 229 /* 230 * Initialize the mutex even if the vnode is going to be a loser. 231 * This simplifies the logic in reclaim, which can then unconditionally 232 * destroy the mutex (in the case of the loser, or if hash_insert 233 * happened to return an error no special casing is needed). 234 */ 235 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 236 lockinit(&np->n_excl, PVFS, "nfsupg", VLKTIMEOUT, LK_NOSHARE | 237 LK_CANRECURSE); 238 239 /* 240 * Are we getting the root? If so, make sure the vnode flags 241 * are correct 242 */ 243 if ((nfhp->nfh_len == nmp->nm_fhsize) && 244 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 245 if (vp->v_type == VNON) 246 vp->v_type = VDIR; 247 vp->v_vflag |= VV_ROOT; 248 } 249 250 vp->v_vflag |= VV_VMSIZEVNLOCK; 251 252 np->n_fhp = nfhp; 253 /* 254 * For NFSv4, we have to attach the directory file handle and 255 * file name, so that Open Ops can be done later. 256 */ 257 if (nmp->nm_flag & NFSMNT_NFSV4) { 258 np->n_v4 = malloc(sizeof (struct nfsv4node) 259 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 260 M_WAITOK); 261 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 262 np->n_v4->n4_namelen = cnp->cn_namelen; 263 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 264 dnp->n_fhp->nfh_len); 265 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 266 cnp->cn_namelen); 267 } else { 268 np->n_v4 = NULL; 269 } 270 271 /* 272 * NFS supports recursive and shared locking. 273 */ 274 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 275 VN_LOCK_AREC(vp); 276 VN_LOCK_ASHARE(vp); 277 error = insmntque(vp, mntp); 278 if (error != 0) { 279 *npp = NULL; 280 mtx_destroy(&np->n_mtx); 281 lockdestroy(&np->n_excl); 282 free(nfhp, M_NFSFH); 283 if (np->n_v4 != NULL) 284 free(np->n_v4, M_NFSV4NODE); 285 uma_zfree(newnfsnode_zone, np); 286 return (error); 287 } 288 error = vfs_hash_insert(vp, hash, lkflags, 289 td, &nvp, newnfs_vncmpf, nfhp); 290 if (error) 291 return (error); 292 if (nvp != NULL) { 293 *npp = VTONFS(nvp); 294 /* vfs_hash_insert() vput()'s the losing vnode */ 295 return (0); 296 } 297 *npp = np; 298 299 return (0); 300 } 301 302 /* 303 * Another variant of nfs_nget(). This one is only used by reopen. It 304 * takes almost the same args as nfs_nget(), but only succeeds if an entry 305 * exists in the cache. (Since files should already be "open" with a 306 * vnode ref cnt on the node when reopen calls this, it should always 307 * succeed.) 308 * Also, don't get a vnode lock, since it may already be locked by some 309 * other process that is handling it. This is ok, since all other threads 310 * on the client are blocked by the nfsc_lock being exclusively held by the 311 * caller of this function. 312 */ 313 int 314 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 315 struct thread *td, struct nfsnode **npp) 316 { 317 struct vnode *nvp; 318 u_int hash; 319 struct nfsfh *nfhp; 320 int error; 321 322 *npp = NULL; 323 /* For forced dismounts, just return error. */ 324 if (NFSCL_FORCEDISM(mntp)) 325 return (EINTR); 326 nfhp = malloc(sizeof (struct nfsfh) + fhsize, 327 M_NFSFH, M_WAITOK); 328 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 329 nfhp->nfh_len = fhsize; 330 331 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 332 333 /* 334 * First, try to get the vnode locked, but don't block for the lock. 335 */ 336 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 337 newnfs_vncmpf, nfhp); 338 if (error == 0 && nvp != NULL) { 339 NFSVOPUNLOCK(nvp); 340 } else if (error == EBUSY) { 341 /* 342 * It is safe so long as a vflush() with 343 * FORCECLOSE has not been done. Since the Renew thread is 344 * stopped and the MNTK_UNMOUNTF flag is set before doing 345 * a vflush() with FORCECLOSE, we should be ok here. 346 */ 347 if (NFSCL_FORCEDISM(mntp)) 348 error = EINTR; 349 else { 350 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 351 if (nvp == NULL) { 352 error = ENOENT; 353 } else if (VN_IS_DOOMED(nvp)) { 354 error = ENOENT; 355 vrele(nvp); 356 } else { 357 error = 0; 358 } 359 } 360 } 361 free(nfhp, M_NFSFH); 362 if (error) 363 return (error); 364 if (nvp != NULL) { 365 *npp = VTONFS(nvp); 366 return (0); 367 } 368 return (EINVAL); 369 } 370 371 static void 372 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 373 struct nfsvattr *newnap) 374 { 375 int off; 376 377 if (ncl_fileid_maxwarnings >= 0 && 378 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 379 return; 380 off = 0; 381 if (ncl_fileid_maxwarnings >= 0) { 382 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 383 off = 1; 384 } 385 386 printf("newnfs: server '%s' error: fileid changed. " 387 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 388 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 389 nmp->nm_com.nmcom_hostname, 390 (uintmax_t)nmp->nm_fsid[0], 391 (uintmax_t)nmp->nm_fsid[1], 392 (uintmax_t)oldnap->na_fileid, 393 (uintmax_t)newnap->na_fileid); 394 395 if (off) 396 printf("newnfs: Logged %d times about fileid corruption; " 397 "going quiet to avoid spamming logs excessively. (Limit " 398 "is: %d).\n", ncl_fileid_nwarnings, 399 ncl_fileid_maxwarnings); 400 } 401 402 /* 403 * Load the attribute cache (that lives in the nfsnode entry) with 404 * the attributes of the second argument and 405 * Iff vaper not NULL 406 * copy the attributes to *vaper 407 * Similar to nfs_loadattrcache(), except the attributes are passed in 408 * instead of being parsed out of the mbuf list. 409 */ 410 int 411 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 412 void *stuff, int writeattr, int dontshrink) 413 { 414 struct vnode *vp = *vpp; 415 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 416 struct nfsnode *np; 417 struct nfsmount *nmp; 418 struct timespec mtime_save; 419 int error, force_fid_err; 420 421 error = 0; 422 423 /* 424 * If v_type == VNON it is a new node, so fill in the v_type, 425 * n_mtime fields. Check to see if it represents a special 426 * device, and if so, check for a possible alias. Once the 427 * correct vnode has been obtained, fill in the rest of the 428 * information. 429 */ 430 np = VTONFS(vp); 431 NFSLOCKNODE(np); 432 if (vp->v_type != nvap->va_type) { 433 vp->v_type = nvap->va_type; 434 if (vp->v_type == VFIFO) 435 vp->v_op = &newnfs_fifoops; 436 np->n_mtime = nvap->va_mtime; 437 } 438 nmp = VFSTONFS(vp->v_mount); 439 vap = &np->n_vattr.na_vattr; 440 mtime_save = vap->va_mtime; 441 if (writeattr) { 442 np->n_vattr.na_filerev = nap->na_filerev; 443 np->n_vattr.na_size = nap->na_size; 444 np->n_vattr.na_mtime = nap->na_mtime; 445 np->n_vattr.na_ctime = nap->na_ctime; 446 np->n_vattr.na_fsid = nap->na_fsid; 447 np->n_vattr.na_mode = nap->na_mode; 448 } else { 449 force_fid_err = 0; 450 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 451 force_fid_err); 452 /* 453 * BROKEN NFS SERVER OR MIDDLEWARE 454 * 455 * Certain NFS servers (certain old proprietary filers ca. 456 * 2006) or broken middleboxes (e.g. WAN accelerator products) 457 * will respond to GETATTR requests with results for a 458 * different fileid. 459 * 460 * The WAN accelerator we've observed not only serves stale 461 * cache results for a given file, it also occasionally serves 462 * results for wholly different files. This causes surprising 463 * problems; for example the cached size attribute of a file 464 * may truncate down and then back up, resulting in zero 465 * regions in file contents read by applications. We observed 466 * this reliably with Clang and .c files during parallel build. 467 * A pcap revealed packet fragmentation and GETATTR RPC 468 * responses with wholly wrong fileids. 469 */ 470 if ((np->n_vattr.na_fileid != 0 && 471 np->n_vattr.na_fileid != nap->na_fileid) || 472 force_fid_err) { 473 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 474 error = EIDRM; 475 goto out; 476 } 477 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 478 sizeof (struct nfsvattr)); 479 } 480 481 /* 482 * For NFSv4, if the node's fsid is not equal to the mount point's 483 * fsid, return the low order 32bits of the node's fsid. This 484 * allows getcwd(3) to work. There is a chance that the fsid might 485 * be the same as a local fs, but since this is in an NFS mount 486 * point, I don't think that will cause any problems? 487 */ 488 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 489 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 490 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 491 /* 492 * va_fsid needs to be set to some value derived from 493 * np->n_vattr.na_filesid that is not equal 494 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 495 * from the value used for the top level server volume 496 * in the mounted subtree. 497 */ 498 vn_fsid(vp, vap); 499 if ((uint32_t)vap->va_fsid == np->n_vattr.na_filesid[0]) 500 vap->va_fsid = hash32_buf( 501 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 502 } else 503 vn_fsid(vp, vap); 504 np->n_attrstamp = time_second; 505 if (vap->va_size != np->n_size) { 506 if (vap->va_type == VREG) { 507 if (dontshrink && vap->va_size < np->n_size) { 508 /* 509 * We've been told not to shrink the file; 510 * zero np->n_attrstamp to indicate that 511 * the attributes are stale. 512 */ 513 vap->va_size = np->n_size; 514 np->n_attrstamp = 0; 515 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 516 } else if (np->n_flag & NMODIFIED) { 517 /* 518 * We've modified the file: Use the larger 519 * of our size, and the server's size. 520 */ 521 if (vap->va_size < np->n_size) { 522 vap->va_size = np->n_size; 523 } else { 524 np->n_size = vap->va_size; 525 np->n_flag |= NSIZECHANGED; 526 } 527 } else { 528 np->n_size = vap->va_size; 529 np->n_flag |= NSIZECHANGED; 530 } 531 } else { 532 np->n_size = vap->va_size; 533 } 534 } 535 /* 536 * The following checks are added to prevent a race between (say) 537 * a READDIR+ and a WRITE. 538 * READDIR+, WRITE requests sent out. 539 * READDIR+ resp, WRITE resp received on client. 540 * However, the WRITE resp was handled before the READDIR+ resp 541 * causing the post op attrs from the write to be loaded first 542 * and the attrs from the READDIR+ to be loaded later. If this 543 * happens, we have stale attrs loaded into the attrcache. 544 * We detect this by for the mtime moving back. We invalidate the 545 * attrcache when this happens. 546 */ 547 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 548 /* Size changed or mtime went backwards */ 549 np->n_attrstamp = 0; 550 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 551 } 552 if (vaper != NULL) { 553 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 554 if (np->n_flag & NCHG) { 555 if (np->n_flag & NACC) 556 vaper->va_atime = np->n_atim; 557 if (np->n_flag & NUPD) 558 vaper->va_mtime = np->n_mtim; 559 } 560 } 561 562 out: 563 #ifdef KDTRACE_HOOKS 564 if (np->n_attrstamp != 0) 565 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 566 #endif 567 (void)ncl_pager_setsize(vp, NULL); 568 return (error); 569 } 570 571 /* 572 * Call vnode_pager_setsize() if the size of the node changed, as 573 * recorded in nfsnode vs. v_object, or delay the call if notifying 574 * the pager is not possible at the moment. 575 * 576 * If nsizep is non-NULL, the call is delayed and the new node size is 577 * provided. Caller should itself call vnode_pager_setsize() if 578 * function returned true. If nsizep is NULL, function tries to call 579 * vnode_pager_setsize() itself if needed and possible, and the nfs 580 * node is unlocked unconditionally, the return value is not useful. 581 */ 582 bool 583 ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep) 584 { 585 struct nfsnode *np; 586 vm_object_t object; 587 struct vattr *vap; 588 u_quad_t nsize; 589 bool setnsize; 590 591 np = VTONFS(vp); 592 NFSASSERTNODE(np); 593 594 vap = &np->n_vattr.na_vattr; 595 nsize = vap->va_size; 596 object = vp->v_object; 597 setnsize = false; 598 599 if (object != NULL && nsize != object->un_pager.vnp.vnp_size) { 600 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) 601 setnsize = true; 602 else 603 np->n_flag |= NVNSETSZSKIP; 604 } 605 if (nsizep == NULL) { 606 NFSUNLOCKNODE(np); 607 if (setnsize) 608 vnode_pager_setsize(vp, nsize); 609 setnsize = false; 610 } else { 611 *nsizep = nsize; 612 } 613 return (setnsize); 614 } 615 616 /* 617 * Fill in the client id name. For these bytes: 618 * 1 - they must be unique 619 * 2 - they should be persistent across client reboots 620 * 1 is more critical than 2 621 * Use the mount point's unique id plus either the uuid or, if that 622 * isn't set, random junk. 623 */ 624 void 625 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 626 { 627 int uuidlen; 628 629 /* 630 * First, put in the 64bit mount point identifier. 631 */ 632 if (idlen >= sizeof (u_int64_t)) { 633 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 634 cp += sizeof (u_int64_t); 635 idlen -= sizeof (u_int64_t); 636 } 637 638 /* 639 * If uuid is non-zero length, use it. 640 */ 641 uuidlen = strlen(uuid); 642 if (uuidlen > 0 && idlen >= uuidlen) { 643 NFSBCOPY(uuid, cp, uuidlen); 644 cp += uuidlen; 645 idlen -= uuidlen; 646 } 647 648 /* 649 * This only normally happens if the uuid isn't set. 650 */ 651 while (idlen > 0) { 652 *cp++ = (u_int8_t)(arc4random() % 256); 653 idlen--; 654 } 655 } 656 657 /* 658 * Fill in a lock owner name. For now, pid + the process's creation time. 659 */ 660 void 661 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 662 { 663 union { 664 u_int32_t lval; 665 u_int8_t cval[4]; 666 } tl; 667 struct proc *p; 668 669 if (id == NULL) { 670 /* Return the single open_owner of all 0 bytes. */ 671 bzero(cp, NFSV4CL_LOCKNAMELEN); 672 return; 673 } 674 if ((flags & F_POSIX) != 0) { 675 p = (struct proc *)id; 676 tl.lval = p->p_pid; 677 *cp++ = tl.cval[0]; 678 *cp++ = tl.cval[1]; 679 *cp++ = tl.cval[2]; 680 *cp++ = tl.cval[3]; 681 tl.lval = p->p_stats->p_start.tv_sec; 682 *cp++ = tl.cval[0]; 683 *cp++ = tl.cval[1]; 684 *cp++ = tl.cval[2]; 685 *cp++ = tl.cval[3]; 686 tl.lval = p->p_stats->p_start.tv_usec; 687 *cp++ = tl.cval[0]; 688 *cp++ = tl.cval[1]; 689 *cp++ = tl.cval[2]; 690 *cp = tl.cval[3]; 691 } else if ((flags & F_FLOCK) != 0) { 692 bcopy(&id, cp, sizeof(id)); 693 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 694 } else { 695 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 696 bzero(cp, NFSV4CL_LOCKNAMELEN); 697 } 698 } 699 700 /* 701 * Find the parent process for the thread passed in as an argument. 702 * If none exists, return NULL, otherwise return a thread for the parent. 703 * (Can be any of the threads, since it is only used for td->td_proc.) 704 */ 705 NFSPROC_T * 706 nfscl_getparent(struct thread *td) 707 { 708 struct proc *p; 709 struct thread *ptd; 710 711 if (td == NULL) 712 return (NULL); 713 p = td->td_proc; 714 if (p->p_pid == 0) 715 return (NULL); 716 p = p->p_pptr; 717 if (p == NULL) 718 return (NULL); 719 ptd = TAILQ_FIRST(&p->p_threads); 720 return (ptd); 721 } 722 723 /* 724 * Start up the renew kernel thread. 725 */ 726 static void 727 start_nfscl(void *arg) 728 { 729 struct nfsclclient *clp; 730 struct thread *td; 731 732 clp = (struct nfsclclient *)arg; 733 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 734 nfscl_renewthread(clp, td); 735 kproc_exit(0); 736 } 737 738 void 739 nfscl_start_renewthread(struct nfsclclient *clp) 740 { 741 742 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 743 "nfscl"); 744 } 745 746 /* 747 * Handle wcc_data. 748 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 749 * as the first Op after PutFH. 750 * (For NFSv4, the postop attributes are after the Op, so they can't be 751 * parsed here. A separate call to nfscl_postop_attr() is required.) 752 */ 753 int 754 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 755 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 756 { 757 u_int32_t *tl; 758 struct nfsnode *np = VTONFS(vp); 759 struct nfsvattr nfsva; 760 int error = 0; 761 762 if (wccflagp != NULL) 763 *wccflagp = 0; 764 if (nd->nd_flag & ND_NFSV3) { 765 *flagp = 0; 766 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 767 if (*tl == newnfs_true) { 768 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 769 if (wccflagp != NULL) { 770 NFSLOCKNODE(np); 771 *wccflagp = (np->n_mtime.tv_sec == 772 fxdr_unsigned(u_int32_t, *(tl + 2)) && 773 np->n_mtime.tv_nsec == 774 fxdr_unsigned(u_int32_t, *(tl + 3))); 775 NFSUNLOCKNODE(np); 776 } 777 } 778 error = nfscl_postop_attr(nd, nap, flagp, stuff); 779 if (wccflagp != NULL && *flagp == 0) 780 *wccflagp = 0; 781 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 782 == (ND_NFSV4 | ND_V4WCCATTR)) { 783 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 784 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 785 NULL, NULL, NULL, NULL, NULL); 786 if (error) 787 return (error); 788 /* 789 * Get rid of Op# and status for next op. 790 */ 791 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 792 if (*++tl) 793 nd->nd_flag |= ND_NOMOREDATA; 794 if (wccflagp != NULL && 795 nfsva.na_vattr.va_mtime.tv_sec != 0) { 796 NFSLOCKNODE(np); 797 *wccflagp = (np->n_mtime.tv_sec == 798 nfsva.na_vattr.va_mtime.tv_sec && 799 np->n_mtime.tv_nsec == 800 nfsva.na_vattr.va_mtime.tv_sec); 801 NFSUNLOCKNODE(np); 802 } 803 } 804 nfsmout: 805 return (error); 806 } 807 808 /* 809 * Get postop attributes. 810 */ 811 int 812 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 813 void *stuff) 814 { 815 u_int32_t *tl; 816 int error = 0; 817 818 *retp = 0; 819 if (nd->nd_flag & ND_NOMOREDATA) 820 return (error); 821 if (nd->nd_flag & ND_NFSV3) { 822 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 823 *retp = fxdr_unsigned(int, *tl); 824 } else if (nd->nd_flag & ND_NFSV4) { 825 /* 826 * For NFSv4, the postop attr are at the end, so no point 827 * in looking if nd_repstat != 0. 828 */ 829 if (!nd->nd_repstat) { 830 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 831 if (*(tl + 1)) 832 /* should never happen since nd_repstat != 0 */ 833 nd->nd_flag |= ND_NOMOREDATA; 834 else 835 *retp = 1; 836 } 837 } else if (!nd->nd_repstat) { 838 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 839 *retp = 1; 840 } 841 if (*retp) { 842 error = nfsm_loadattr(nd, nap); 843 if (error) 844 *retp = 0; 845 } 846 nfsmout: 847 return (error); 848 } 849 850 /* 851 * nfscl_request() - mostly a wrapper for newnfs_request(). 852 */ 853 int 854 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 855 struct ucred *cred, void *stuff) 856 { 857 int ret, vers; 858 struct nfsmount *nmp; 859 860 nmp = VFSTONFS(vp->v_mount); 861 if (nd->nd_flag & ND_NFSV4) 862 vers = NFS_VER4; 863 else if (nd->nd_flag & ND_NFSV3) 864 vers = NFS_VER3; 865 else 866 vers = NFS_VER2; 867 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 868 NFS_PROG, vers, NULL, 1, NULL, NULL); 869 return (ret); 870 } 871 872 /* 873 * fill in this bsden's variant of statfs using nfsstatfs. 874 */ 875 void 876 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 877 { 878 struct statfs *sbp = (struct statfs *)statfs; 879 880 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 881 sbp->f_bsize = NFS_FABLKSIZE; 882 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 883 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 884 /* 885 * Although sf_abytes is uint64_t and f_bavail is int64_t, 886 * the value after dividing by NFS_FABLKSIZE is small 887 * enough that it will fit in 63bits, so it is ok to 888 * assign it to f_bavail without fear that it will become 889 * negative. 890 */ 891 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 892 sbp->f_files = sfp->sf_tfiles; 893 /* Since f_ffree is int64_t, clip it to 63bits. */ 894 if (sfp->sf_ffiles > INT64_MAX) 895 sbp->f_ffree = INT64_MAX; 896 else 897 sbp->f_ffree = sfp->sf_ffiles; 898 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 899 /* 900 * The type casts to (int32_t) ensure that this code is 901 * compatible with the old NFS client, in that it will 902 * propagate bit31 to the high order bits. This may or may 903 * not be correct for NFSv2, but since it is a legacy 904 * environment, I'd rather retain backwards compatibility. 905 */ 906 sbp->f_bsize = (int32_t)sfp->sf_bsize; 907 sbp->f_blocks = (int32_t)sfp->sf_blocks; 908 sbp->f_bfree = (int32_t)sfp->sf_bfree; 909 sbp->f_bavail = (int32_t)sfp->sf_bavail; 910 sbp->f_files = 0; 911 sbp->f_ffree = 0; 912 } 913 } 914 915 /* 916 * Use the fsinfo stuff to update the mount point. 917 */ 918 void 919 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 920 { 921 922 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 923 fsp->fs_wtpref >= NFS_FABLKSIZE) 924 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 925 ~(NFS_FABLKSIZE - 1); 926 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 927 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 928 if (nmp->nm_wsize == 0) 929 nmp->nm_wsize = fsp->fs_wtmax; 930 } 931 if (nmp->nm_wsize < NFS_FABLKSIZE) 932 nmp->nm_wsize = NFS_FABLKSIZE; 933 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 934 fsp->fs_rtpref >= NFS_FABLKSIZE) 935 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 936 ~(NFS_FABLKSIZE - 1); 937 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 938 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 939 if (nmp->nm_rsize == 0) 940 nmp->nm_rsize = fsp->fs_rtmax; 941 } 942 if (nmp->nm_rsize < NFS_FABLKSIZE) 943 nmp->nm_rsize = NFS_FABLKSIZE; 944 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 945 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 946 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 947 ~(NFS_DIRBLKSIZ - 1); 948 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 949 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 950 if (nmp->nm_readdirsize == 0) 951 nmp->nm_readdirsize = fsp->fs_rtmax; 952 } 953 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 954 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 955 if (fsp->fs_maxfilesize > 0 && 956 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 957 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 958 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 959 nmp->nm_state |= NFSSTA_GOTFSINFO; 960 } 961 962 /* 963 * Lookups source address which should be used to communicate with 964 * @nmp and stores it inside @pdst. 965 * 966 * Returns 0 on success. 967 */ 968 u_int8_t * 969 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 970 { 971 #if defined(INET6) || defined(INET) 972 int error, fibnum; 973 974 fibnum = curthread->td_proc->p_fibnum; 975 #endif 976 #ifdef INET 977 if (nmp->nm_nam->sa_family == AF_INET) { 978 struct sockaddr_in *sin; 979 struct nhop4_extended nh_ext; 980 981 sin = (struct sockaddr_in *)nmp->nm_nam; 982 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 983 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 984 &nh_ext); 985 CURVNET_RESTORE(); 986 if (error != 0) 987 return (NULL); 988 989 if (IN_LOOPBACK(ntohl(nh_ext.nh_src.s_addr))) { 990 /* Ignore loopback addresses */ 991 return (NULL); 992 } 993 994 *isinet6p = 0; 995 *((struct in_addr *)paddr) = nh_ext.nh_src; 996 997 return (u_int8_t *)paddr; 998 } 999 #endif 1000 #ifdef INET6 1001 if (nmp->nm_nam->sa_family == AF_INET6) { 1002 struct sockaddr_in6 *sin6; 1003 1004 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1005 1006 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1007 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1008 sin6->sin6_scope_id, NULL, paddr, NULL); 1009 CURVNET_RESTORE(); 1010 if (error != 0) 1011 return (NULL); 1012 1013 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1014 return (NULL); 1015 1016 /* Scope is embedded in */ 1017 *isinet6p = 1; 1018 1019 return (u_int8_t *)paddr; 1020 } 1021 #endif 1022 return (NULL); 1023 } 1024 1025 /* 1026 * Copy NFS uid, gids from the cred structure. 1027 */ 1028 void 1029 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1030 { 1031 int i; 1032 1033 KASSERT(cr->cr_ngroups >= 0, 1034 ("newnfs_copyincred: negative cr_ngroups")); 1035 nfscr->nfsc_uid = cr->cr_uid; 1036 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1037 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1038 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1039 } 1040 1041 1042 /* 1043 * Do any client specific initialization. 1044 */ 1045 void 1046 nfscl_init(void) 1047 { 1048 static int inited = 0; 1049 1050 if (inited) 1051 return; 1052 inited = 1; 1053 nfscl_inited = 1; 1054 ncl_pbuf_zone = pbuf_zsecond_create("nfspbuf", nswbuf / 2); 1055 } 1056 1057 /* 1058 * Check each of the attributes to be set, to ensure they aren't already 1059 * the correct value. Disable setting ones already correct. 1060 */ 1061 int 1062 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1063 { 1064 1065 if (vap->va_mode != (mode_t)VNOVAL) { 1066 if (vap->va_mode == nvap->na_mode) 1067 vap->va_mode = (mode_t)VNOVAL; 1068 } 1069 if (vap->va_uid != (uid_t)VNOVAL) { 1070 if (vap->va_uid == nvap->na_uid) 1071 vap->va_uid = (uid_t)VNOVAL; 1072 } 1073 if (vap->va_gid != (gid_t)VNOVAL) { 1074 if (vap->va_gid == nvap->na_gid) 1075 vap->va_gid = (gid_t)VNOVAL; 1076 } 1077 if (vap->va_size != VNOVAL) { 1078 if (vap->va_size == nvap->na_size) 1079 vap->va_size = VNOVAL; 1080 } 1081 1082 /* 1083 * We are normally called with only a partially initialized 1084 * VAP. Since the NFSv3 spec says that server may use the 1085 * file attributes to store the verifier, the spec requires 1086 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1087 * in atime, but we can't really assume that all servers will 1088 * so we ensure that our SETATTR sets both atime and mtime. 1089 * Set the VA_UTIMES_NULL flag for this case, so that 1090 * the server's time will be used. This is needed to 1091 * work around a bug in some Solaris servers, where 1092 * setting the time TOCLIENT causes the Setattr RPC 1093 * to return NFS_OK, but not set va_mode. 1094 */ 1095 if (vap->va_mtime.tv_sec == VNOVAL) { 1096 vfs_timestamp(&vap->va_mtime); 1097 vap->va_vaflags |= VA_UTIMES_NULL; 1098 } 1099 if (vap->va_atime.tv_sec == VNOVAL) 1100 vap->va_atime = vap->va_mtime; 1101 return (1); 1102 } 1103 1104 /* 1105 * Map nfsv4 errors to errno.h errors. 1106 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1107 * error should only be returned for the Open, Create and Setattr Ops. 1108 * As such, most calls can just pass in 0 for those arguments. 1109 */ 1110 APPLESTATIC int 1111 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1112 { 1113 struct proc *p; 1114 1115 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1116 return (error); 1117 if (td != NULL) 1118 p = td->td_proc; 1119 else 1120 p = NULL; 1121 switch (error) { 1122 case NFSERR_BADOWNER: 1123 tprintf(p, LOG_INFO, 1124 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1125 uid, gid); 1126 return (EPERM); 1127 case NFSERR_BADNAME: 1128 case NFSERR_BADCHAR: 1129 printf("nfsv4 char/name not handled by server\n"); 1130 return (ENOENT); 1131 case NFSERR_STALECLIENTID: 1132 case NFSERR_STALESTATEID: 1133 case NFSERR_EXPIRED: 1134 case NFSERR_BADSTATEID: 1135 case NFSERR_BADSESSION: 1136 printf("nfsv4 recover err returned %d\n", error); 1137 return (EIO); 1138 case NFSERR_BADHANDLE: 1139 case NFSERR_SERVERFAULT: 1140 case NFSERR_BADTYPE: 1141 case NFSERR_FHEXPIRED: 1142 case NFSERR_RESOURCE: 1143 case NFSERR_MOVED: 1144 case NFSERR_NOFILEHANDLE: 1145 case NFSERR_MINORVERMISMATCH: 1146 case NFSERR_OLDSTATEID: 1147 case NFSERR_BADSEQID: 1148 case NFSERR_LEASEMOVED: 1149 case NFSERR_RECLAIMBAD: 1150 case NFSERR_BADXDR: 1151 case NFSERR_OPILLEGAL: 1152 printf("nfsv4 client/server protocol prob err=%d\n", 1153 error); 1154 return (EIO); 1155 default: 1156 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1157 return (EIO); 1158 }; 1159 } 1160 1161 /* 1162 * Check to see if the process for this owner exists. Return 1 if it doesn't 1163 * and 0 otherwise. 1164 */ 1165 int 1166 nfscl_procdoesntexist(u_int8_t *own) 1167 { 1168 union { 1169 u_int32_t lval; 1170 u_int8_t cval[4]; 1171 } tl; 1172 struct proc *p; 1173 pid_t pid; 1174 int i, ret = 0; 1175 1176 /* For the single open_owner of all 0 bytes, just return 0. */ 1177 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1178 if (own[i] != 0) 1179 break; 1180 if (i == NFSV4CL_LOCKNAMELEN) 1181 return (0); 1182 1183 tl.cval[0] = *own++; 1184 tl.cval[1] = *own++; 1185 tl.cval[2] = *own++; 1186 tl.cval[3] = *own++; 1187 pid = tl.lval; 1188 p = pfind_any_locked(pid); 1189 if (p == NULL) 1190 return (1); 1191 if (p->p_stats == NULL) { 1192 PROC_UNLOCK(p); 1193 return (0); 1194 } 1195 tl.cval[0] = *own++; 1196 tl.cval[1] = *own++; 1197 tl.cval[2] = *own++; 1198 tl.cval[3] = *own++; 1199 if (tl.lval != p->p_stats->p_start.tv_sec) { 1200 ret = 1; 1201 } else { 1202 tl.cval[0] = *own++; 1203 tl.cval[1] = *own++; 1204 tl.cval[2] = *own++; 1205 tl.cval[3] = *own; 1206 if (tl.lval != p->p_stats->p_start.tv_usec) 1207 ret = 1; 1208 } 1209 PROC_UNLOCK(p); 1210 return (ret); 1211 } 1212 1213 /* 1214 * - nfs pseudo system call for the client 1215 */ 1216 /* 1217 * MPSAFE 1218 */ 1219 static int 1220 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1221 { 1222 struct file *fp; 1223 struct nfscbd_args nfscbdarg; 1224 struct nfsd_nfscbd_args nfscbdarg2; 1225 struct nameidata nd; 1226 struct nfscl_dumpmntopts dumpmntopts; 1227 cap_rights_t rights; 1228 char *buf; 1229 int error; 1230 struct mount *mp; 1231 struct nfsmount *nmp; 1232 1233 if (uap->flag & NFSSVC_CBADDSOCK) { 1234 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1235 if (error) 1236 return (error); 1237 /* 1238 * Since we don't know what rights might be required, 1239 * pretend that we need them all. It is better to be too 1240 * careful than too reckless. 1241 */ 1242 error = fget(td, nfscbdarg.sock, 1243 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1244 if (error) 1245 return (error); 1246 if (fp->f_type != DTYPE_SOCKET) { 1247 fdrop(fp, td); 1248 return (EPERM); 1249 } 1250 error = nfscbd_addsock(fp); 1251 fdrop(fp, td); 1252 if (!error && nfscl_enablecallb == 0) { 1253 nfsv4_cbport = nfscbdarg.port; 1254 nfscl_enablecallb = 1; 1255 } 1256 } else if (uap->flag & NFSSVC_NFSCBD) { 1257 if (uap->argp == NULL) 1258 return (EINVAL); 1259 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1260 sizeof(nfscbdarg2)); 1261 if (error) 1262 return (error); 1263 error = nfscbd_nfsd(td, &nfscbdarg2); 1264 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1265 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1266 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1267 dumpmntopts.ndmnt_blen > 1024)) 1268 error = EINVAL; 1269 if (error == 0) 1270 error = nfsrv_lookupfilename(&nd, 1271 dumpmntopts.ndmnt_fname, td); 1272 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1273 "nfs") != 0) { 1274 vput(nd.ni_vp); 1275 error = EINVAL; 1276 } 1277 if (error == 0) { 1278 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1279 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1280 dumpmntopts.ndmnt_blen); 1281 vput(nd.ni_vp); 1282 error = copyout(buf, dumpmntopts.ndmnt_buf, 1283 dumpmntopts.ndmnt_blen); 1284 free(buf, M_TEMP); 1285 } 1286 } else if (uap->flag & NFSSVC_FORCEDISM) { 1287 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1288 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1289 if (error == 0) { 1290 nmp = NULL; 1291 mtx_lock(&mountlist_mtx); 1292 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1293 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1294 0 && strcmp(mp->mnt_stat.f_fstypename, 1295 "nfs") == 0 && mp->mnt_data != NULL) { 1296 nmp = VFSTONFS(mp); 1297 NFSDDSLOCK(); 1298 if (nfsv4_findmirror(nmp) != NULL) { 1299 NFSDDSUNLOCK(); 1300 error = ENXIO; 1301 nmp = NULL; 1302 break; 1303 } 1304 mtx_lock(&nmp->nm_mtx); 1305 if ((nmp->nm_privflag & 1306 NFSMNTP_FORCEDISM) == 0) { 1307 nmp->nm_privflag |= 1308 (NFSMNTP_FORCEDISM | 1309 NFSMNTP_CANCELRPCS); 1310 mtx_unlock(&nmp->nm_mtx); 1311 } else { 1312 mtx_unlock(&nmp->nm_mtx); 1313 nmp = NULL; 1314 } 1315 NFSDDSUNLOCK(); 1316 break; 1317 } 1318 } 1319 mtx_unlock(&mountlist_mtx); 1320 1321 if (nmp != NULL) { 1322 /* 1323 * Call newnfs_nmcancelreqs() to cause 1324 * any RPCs in progress on the mount point to 1325 * fail. 1326 * This will cause any process waiting for an 1327 * RPC to complete while holding a vnode lock 1328 * on the mounted-on vnode (such as "df" or 1329 * a non-forced "umount") to fail. 1330 * This will unlock the mounted-on vnode so 1331 * a forced dismount can succeed. 1332 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1333 * so that nfs_unmount() can complete. 1334 */ 1335 newnfs_nmcancelreqs(nmp); 1336 mtx_lock(&nmp->nm_mtx); 1337 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1338 wakeup(nmp); 1339 mtx_unlock(&nmp->nm_mtx); 1340 } else if (error == 0) 1341 error = EINVAL; 1342 } 1343 free(buf, M_TEMP); 1344 } else { 1345 error = EINVAL; 1346 } 1347 return (error); 1348 } 1349 1350 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1351 1352 /* 1353 * Called once to initialize data structures... 1354 */ 1355 static int 1356 nfscl_modevent(module_t mod, int type, void *data) 1357 { 1358 int error = 0; 1359 static int loaded = 0; 1360 1361 switch (type) { 1362 case MOD_LOAD: 1363 if (loaded) 1364 return (0); 1365 newnfs_portinit(); 1366 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1367 nfscl_init(); 1368 NFSD_LOCK(); 1369 nfsrvd_cbinit(0); 1370 NFSD_UNLOCK(); 1371 ncl_call_invalcaches = ncl_invalcaches; 1372 nfsd_call_nfscl = nfssvc_nfscl; 1373 loaded = 1; 1374 break; 1375 1376 case MOD_UNLOAD: 1377 if (nfs_numnfscbd != 0) { 1378 error = EBUSY; 1379 break; 1380 } 1381 1382 /* 1383 * XXX: Unloading of nfscl module is unsupported. 1384 */ 1385 #if 0 1386 ncl_call_invalcaches = NULL; 1387 nfsd_call_nfscl = NULL; 1388 uma_zdestroy(ncl_pbuf_zone); 1389 /* and get rid of the mutexes */ 1390 mtx_destroy(&ncl_iod_mutex); 1391 loaded = 0; 1392 break; 1393 #else 1394 /* FALLTHROUGH */ 1395 #endif 1396 default: 1397 error = EOPNOTSUPP; 1398 break; 1399 } 1400 return error; 1401 } 1402 static moduledata_t nfscl_mod = { 1403 "nfscl", 1404 nfscl_modevent, 1405 NULL, 1406 }; 1407 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1408 1409 /* So that loader and kldload(2) can find us, wherever we are.. */ 1410 MODULE_VERSION(nfscl, 1); 1411 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1412 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1413 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1414 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1415 1416