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sys/fs/nfsclient/nfs_clport.c
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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 int ncl_pbuf_freecnt; 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 VI_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 VI_DOOMED 155 * flag isn't set now. 156 */ 157 VI_LOCK(nvp); 158 if ((nvp->v_iflag & VI_DOOMED)) { 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, 0); 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 ((nvp->v_iflag & VI_DOOMED) != 0) { 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 void 403 ncl_copy_vattr(struct vattr *dst, struct vattr *src) 404 { 405 dst->va_type = src->va_type; 406 dst->va_mode = src->va_mode; 407 dst->va_nlink = src->va_nlink; 408 dst->va_uid = src->va_uid; 409 dst->va_gid = src->va_gid; 410 dst->va_fsid = src->va_fsid; 411 dst->va_fileid = src->va_fileid; 412 dst->va_size = src->va_size; 413 dst->va_blocksize = src->va_blocksize; 414 dst->va_atime = src->va_atime; 415 dst->va_mtime = src->va_mtime; 416 dst->va_ctime = src->va_ctime; 417 dst->va_gen = src->va_gen; 418 dst->va_flags = src->va_flags; 419 dst->va_rdev = src->va_rdev; 420 dst->va_bytes = src->va_bytes; 421 dst->va_filerev = src->va_filerev; 422 } 423 424 /* 425 * Load the attribute cache (that lives in the nfsnode entry) with 426 * the attributes of the second argument and 427 * Iff vaper not NULL 428 * copy the attributes to *vaper 429 * Similar to nfs_loadattrcache(), except the attributes are passed in 430 * instead of being parsed out of the mbuf list. 431 */ 432 int 433 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 434 void *stuff, int writeattr, int dontshrink) 435 { 436 struct vnode *vp = *vpp; 437 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 438 struct nfsnode *np; 439 struct nfsmount *nmp; 440 struct timespec mtime_save; 441 int error, force_fid_err; 442 dev_t topfsid; 443 444 error = 0; 445 446 /* 447 * If v_type == VNON it is a new node, so fill in the v_type, 448 * n_mtime fields. Check to see if it represents a special 449 * device, and if so, check for a possible alias. Once the 450 * correct vnode has been obtained, fill in the rest of the 451 * information. 452 */ 453 np = VTONFS(vp); 454 NFSLOCKNODE(np); 455 if (vp->v_type != nvap->va_type) { 456 vp->v_type = nvap->va_type; 457 if (vp->v_type == VFIFO) 458 vp->v_op = &newnfs_fifoops; 459 np->n_mtime = nvap->va_mtime; 460 } 461 nmp = VFSTONFS(vp->v_mount); 462 vap = &np->n_vattr.na_vattr; 463 mtime_save = vap->va_mtime; 464 if (writeattr) { 465 np->n_vattr.na_filerev = nap->na_filerev; 466 np->n_vattr.na_size = nap->na_size; 467 np->n_vattr.na_mtime = nap->na_mtime; 468 np->n_vattr.na_ctime = nap->na_ctime; 469 np->n_vattr.na_fsid = nap->na_fsid; 470 np->n_vattr.na_mode = nap->na_mode; 471 } else { 472 force_fid_err = 0; 473 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 474 force_fid_err); 475 /* 476 * BROKEN NFS SERVER OR MIDDLEWARE 477 * 478 * Certain NFS servers (certain old proprietary filers ca. 479 * 2006) or broken middleboxes (e.g. WAN accelerator products) 480 * will respond to GETATTR requests with results for a 481 * different fileid. 482 * 483 * The WAN accelerator we've observed not only serves stale 484 * cache results for a given file, it also occasionally serves 485 * results for wholly different files. This causes surprising 486 * problems; for example the cached size attribute of a file 487 * may truncate down and then back up, resulting in zero 488 * regions in file contents read by applications. We observed 489 * this reliably with Clang and .c files during parallel build. 490 * A pcap revealed packet fragmentation and GETATTR RPC 491 * responses with wholly wrong fileids. 492 */ 493 if ((np->n_vattr.na_fileid != 0 && 494 np->n_vattr.na_fileid != nap->na_fileid) || 495 force_fid_err) { 496 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 497 error = EIDRM; 498 goto out; 499 } 500 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 501 sizeof (struct nfsvattr)); 502 } 503 504 /* 505 * For NFSv4, the server's export may be a tree of file systems 506 * where a fileno is a unique value within each file system. 507 * na_filesid[0,1] uniquely identify the server file system 508 * and nm_fsid[0,1] is the value for the root file system mounted. 509 * As such, the value of va_fsid generated by vn_fsid() represents 510 * the root file system on the server and a different value for 511 * va_fsid is needed for the other server file systems. This 512 * va_fsid is ideally unique for all of the server file systems, 513 * so a 64bit hash on na_filesid[0,1] is calculated. 514 * Although highly unlikely that the fnv_64_hash() will be 515 * the same as the root, test for this case and recalculate the hash. 516 */ 517 vn_fsid(vp, vap); 518 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 519 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 520 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 521 topfsid = vap->va_fsid; 522 vap->va_fsid = FNV1_64_INIT; 523 do { 524 vap->va_fsid = fnv_64_buf(np->n_vattr.na_filesid, 525 sizeof(np->n_vattr.na_filesid), vap->va_fsid); 526 } while (vap->va_fsid == topfsid); 527 } 528 529 np->n_attrstamp = time_second; 530 if (vap->va_size != np->n_size) { 531 if (vap->va_type == VREG) { 532 if (dontshrink && vap->va_size < np->n_size) { 533 /* 534 * We've been told not to shrink the file; 535 * zero np->n_attrstamp to indicate that 536 * the attributes are stale. 537 */ 538 vap->va_size = np->n_size; 539 np->n_attrstamp = 0; 540 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 541 } else if (np->n_flag & NMODIFIED) { 542 /* 543 * We've modified the file: Use the larger 544 * of our size, and the server's size. 545 */ 546 if (vap->va_size < np->n_size) { 547 vap->va_size = np->n_size; 548 } else { 549 np->n_size = vap->va_size; 550 np->n_flag |= NSIZECHANGED; 551 } 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 } 559 } 560 /* 561 * The following checks are added to prevent a race between (say) 562 * a READDIR+ and a WRITE. 563 * READDIR+, WRITE requests sent out. 564 * READDIR+ resp, WRITE resp received on client. 565 * However, the WRITE resp was handled before the READDIR+ resp 566 * causing the post op attrs from the write to be loaded first 567 * and the attrs from the READDIR+ to be loaded later. If this 568 * happens, we have stale attrs loaded into the attrcache. 569 * We detect this by for the mtime moving back. We invalidate the 570 * attrcache when this happens. 571 */ 572 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 573 /* Size changed or mtime went backwards */ 574 np->n_attrstamp = 0; 575 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 576 } 577 if (vaper != NULL) { 578 ncl_copy_vattr(vaper, vap); 579 if (np->n_flag & NCHG) { 580 if (np->n_flag & NACC) 581 vaper->va_atime = np->n_atim; 582 if (np->n_flag & NUPD) 583 vaper->va_mtime = np->n_mtim; 584 } 585 } 586 587 out: 588 #ifdef KDTRACE_HOOKS 589 if (np->n_attrstamp != 0) 590 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 591 #endif 592 (void)ncl_pager_setsize(vp, NULL); 593 return (error); 594 } 595 596 /* 597 * Call vnode_pager_setsize() if the size of the node changed, as 598 * recorded in nfsnode vs. v_object, or delay the call if notifying 599 * the pager is not possible at the moment. 600 * 601 * If nsizep is non-NULL, the call is delayed and the new node size is 602 * provided. Caller should itself call vnode_pager_setsize() if 603 * function returned true. If nsizep is NULL, function tries to call 604 * vnode_pager_setsize() itself if needed and possible, and the nfs 605 * node is unlocked unconditionally, the return value is not useful. 606 */ 607 bool 608 ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep) 609 { 610 struct nfsnode *np; 611 vm_object_t object; 612 struct vattr *vap; 613 u_quad_t nsize; 614 bool setnsize; 615 616 np = VTONFS(vp); 617 NFSASSERTNODE(np); 618 619 vap = &np->n_vattr.na_vattr; 620 nsize = vap->va_size; 621 object = vp->v_object; 622 setnsize = false; 623 624 if (object != NULL && nsize != object->un_pager.vnp.vnp_size) { 625 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE && 626 (curthread->td_pflags2 & TDP2_SBPAGES) == 0) 627 setnsize = true; 628 else 629 np->n_flag |= NVNSETSZSKIP; 630 } 631 if (nsizep == NULL) { 632 NFSUNLOCKNODE(np); 633 if (setnsize) 634 vnode_pager_setsize(vp, nsize); 635 setnsize = false; 636 } else { 637 *nsizep = nsize; 638 } 639 return (setnsize); 640 } 641 642 /* 643 * Fill in the client id name. For these bytes: 644 * 1 - they must be unique 645 * 2 - they should be persistent across client reboots 646 * 1 is more critical than 2 647 * Use the mount point's unique id plus either the uuid or, if that 648 * isn't set, random junk. 649 */ 650 void 651 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 652 { 653 int uuidlen; 654 655 /* 656 * First, put in the 64bit mount point identifier. 657 */ 658 if (idlen >= sizeof (u_int64_t)) { 659 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 660 cp += sizeof (u_int64_t); 661 idlen -= sizeof (u_int64_t); 662 } 663 664 /* 665 * If uuid is non-zero length, use it. 666 */ 667 uuidlen = strlen(uuid); 668 if (uuidlen > 0 && idlen >= uuidlen) { 669 NFSBCOPY(uuid, cp, uuidlen); 670 cp += uuidlen; 671 idlen -= uuidlen; 672 } 673 674 /* 675 * This only normally happens if the uuid isn't set. 676 */ 677 while (idlen > 0) { 678 *cp++ = (u_int8_t)(arc4random() % 256); 679 idlen--; 680 } 681 } 682 683 /* 684 * Fill in a lock owner name. For now, pid + the process's creation time. 685 */ 686 void 687 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 688 { 689 union { 690 u_int32_t lval; 691 u_int8_t cval[4]; 692 } tl; 693 struct proc *p; 694 695 if (id == NULL) { 696 /* Return the single open_owner of all 0 bytes. */ 697 bzero(cp, NFSV4CL_LOCKNAMELEN); 698 return; 699 } 700 if ((flags & F_POSIX) != 0) { 701 p = (struct proc *)id; 702 tl.lval = p->p_pid; 703 *cp++ = tl.cval[0]; 704 *cp++ = tl.cval[1]; 705 *cp++ = tl.cval[2]; 706 *cp++ = tl.cval[3]; 707 tl.lval = p->p_stats->p_start.tv_sec; 708 *cp++ = tl.cval[0]; 709 *cp++ = tl.cval[1]; 710 *cp++ = tl.cval[2]; 711 *cp++ = tl.cval[3]; 712 tl.lval = p->p_stats->p_start.tv_usec; 713 *cp++ = tl.cval[0]; 714 *cp++ = tl.cval[1]; 715 *cp++ = tl.cval[2]; 716 *cp = tl.cval[3]; 717 } else if ((flags & F_FLOCK) != 0) { 718 bcopy(&id, cp, sizeof(id)); 719 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 720 } else { 721 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 722 bzero(cp, NFSV4CL_LOCKNAMELEN); 723 } 724 } 725 726 /* 727 * Find the parent process for the thread passed in as an argument. 728 * If none exists, return NULL, otherwise return a thread for the parent. 729 * (Can be any of the threads, since it is only used for td->td_proc.) 730 */ 731 NFSPROC_T * 732 nfscl_getparent(struct thread *td) 733 { 734 struct proc *p; 735 struct thread *ptd; 736 737 if (td == NULL) 738 return (NULL); 739 p = td->td_proc; 740 if (p->p_pid == 0) 741 return (NULL); 742 p = p->p_pptr; 743 if (p == NULL) 744 return (NULL); 745 ptd = TAILQ_FIRST(&p->p_threads); 746 return (ptd); 747 } 748 749 /* 750 * Start up the renew kernel thread. 751 */ 752 static void 753 start_nfscl(void *arg) 754 { 755 struct nfsclclient *clp; 756 struct thread *td; 757 758 clp = (struct nfsclclient *)arg; 759 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 760 nfscl_renewthread(clp, td); 761 kproc_exit(0); 762 } 763 764 void 765 nfscl_start_renewthread(struct nfsclclient *clp) 766 { 767 768 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 769 "nfscl"); 770 } 771 772 /* 773 * Handle wcc_data. 774 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 775 * as the first Op after PutFH. 776 * (For NFSv4, the postop attributes are after the Op, so they can't be 777 * parsed here. A separate call to nfscl_postop_attr() is required.) 778 */ 779 int 780 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 781 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 782 { 783 u_int32_t *tl; 784 struct nfsnode *np = VTONFS(vp); 785 struct nfsvattr nfsva; 786 int error = 0; 787 788 if (wccflagp != NULL) 789 *wccflagp = 0; 790 if (nd->nd_flag & ND_NFSV3) { 791 *flagp = 0; 792 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 793 if (*tl == newnfs_true) { 794 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 795 if (wccflagp != NULL) { 796 NFSLOCKNODE(np); 797 *wccflagp = (np->n_mtime.tv_sec == 798 fxdr_unsigned(u_int32_t, *(tl + 2)) && 799 np->n_mtime.tv_nsec == 800 fxdr_unsigned(u_int32_t, *(tl + 3))); 801 NFSUNLOCKNODE(np); 802 } 803 } 804 error = nfscl_postop_attr(nd, nap, flagp, stuff); 805 if (wccflagp != NULL && *flagp == 0) 806 *wccflagp = 0; 807 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 808 == (ND_NFSV4 | ND_V4WCCATTR)) { 809 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 810 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 811 NULL, NULL, NULL, NULL, NULL); 812 if (error) 813 return (error); 814 /* 815 * Get rid of Op# and status for next op. 816 */ 817 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 818 if (*++tl) 819 nd->nd_flag |= ND_NOMOREDATA; 820 if (wccflagp != NULL && 821 nfsva.na_vattr.va_mtime.tv_sec != 0) { 822 NFSLOCKNODE(np); 823 *wccflagp = (np->n_mtime.tv_sec == 824 nfsva.na_vattr.va_mtime.tv_sec && 825 np->n_mtime.tv_nsec == 826 nfsva.na_vattr.va_mtime.tv_sec); 827 NFSUNLOCKNODE(np); 828 } 829 } 830 nfsmout: 831 return (error); 832 } 833 834 /* 835 * Get postop attributes. 836 */ 837 int 838 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 839 void *stuff) 840 { 841 u_int32_t *tl; 842 int error = 0; 843 844 *retp = 0; 845 if (nd->nd_flag & ND_NOMOREDATA) 846 return (error); 847 if (nd->nd_flag & ND_NFSV3) { 848 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 849 *retp = fxdr_unsigned(int, *tl); 850 } else if (nd->nd_flag & ND_NFSV4) { 851 /* 852 * For NFSv4, the postop attr are at the end, so no point 853 * in looking if nd_repstat != 0. 854 */ 855 if (!nd->nd_repstat) { 856 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 857 if (*(tl + 1)) 858 /* should never happen since nd_repstat != 0 */ 859 nd->nd_flag |= ND_NOMOREDATA; 860 else 861 *retp = 1; 862 } 863 } else if (!nd->nd_repstat) { 864 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 865 *retp = 1; 866 } 867 if (*retp) { 868 error = nfsm_loadattr(nd, nap); 869 if (error) 870 *retp = 0; 871 } 872 nfsmout: 873 return (error); 874 } 875 876 /* 877 * nfscl_request() - mostly a wrapper for newnfs_request(). 878 */ 879 int 880 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 881 struct ucred *cred, void *stuff) 882 { 883 int ret, vers; 884 struct nfsmount *nmp; 885 886 nmp = VFSTONFS(vp->v_mount); 887 if (nd->nd_flag & ND_NFSV4) 888 vers = NFS_VER4; 889 else if (nd->nd_flag & ND_NFSV3) 890 vers = NFS_VER3; 891 else 892 vers = NFS_VER2; 893 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 894 NFS_PROG, vers, NULL, 1, NULL, NULL); 895 return (ret); 896 } 897 898 /* 899 * fill in this bsden's variant of statfs using nfsstatfs. 900 */ 901 void 902 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 903 { 904 struct statfs *sbp = (struct statfs *)statfs; 905 906 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 907 sbp->f_bsize = NFS_FABLKSIZE; 908 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 909 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 910 /* 911 * Although sf_abytes is uint64_t and f_bavail is int64_t, 912 * the value after dividing by NFS_FABLKSIZE is small 913 * enough that it will fit in 63bits, so it is ok to 914 * assign it to f_bavail without fear that it will become 915 * negative. 916 */ 917 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 918 sbp->f_files = sfp->sf_tfiles; 919 /* Since f_ffree is int64_t, clip it to 63bits. */ 920 if (sfp->sf_ffiles > INT64_MAX) 921 sbp->f_ffree = INT64_MAX; 922 else 923 sbp->f_ffree = sfp->sf_ffiles; 924 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 925 /* 926 * The type casts to (int32_t) ensure that this code is 927 * compatible with the old NFS client, in that it will 928 * propagate bit31 to the high order bits. This may or may 929 * not be correct for NFSv2, but since it is a legacy 930 * environment, I'd rather retain backwards compatibility. 931 */ 932 sbp->f_bsize = (int32_t)sfp->sf_bsize; 933 sbp->f_blocks = (int32_t)sfp->sf_blocks; 934 sbp->f_bfree = (int32_t)sfp->sf_bfree; 935 sbp->f_bavail = (int32_t)sfp->sf_bavail; 936 sbp->f_files = 0; 937 sbp->f_ffree = 0; 938 } 939 } 940 941 /* 942 * Use the fsinfo stuff to update the mount point. 943 */ 944 void 945 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 946 { 947 948 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 949 fsp->fs_wtpref >= NFS_FABLKSIZE) 950 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 951 ~(NFS_FABLKSIZE - 1); 952 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 953 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 954 if (nmp->nm_wsize == 0) 955 nmp->nm_wsize = fsp->fs_wtmax; 956 } 957 if (nmp->nm_wsize < NFS_FABLKSIZE) 958 nmp->nm_wsize = NFS_FABLKSIZE; 959 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 960 fsp->fs_rtpref >= NFS_FABLKSIZE) 961 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 962 ~(NFS_FABLKSIZE - 1); 963 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 964 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 965 if (nmp->nm_rsize == 0) 966 nmp->nm_rsize = fsp->fs_rtmax; 967 } 968 if (nmp->nm_rsize < NFS_FABLKSIZE) 969 nmp->nm_rsize = NFS_FABLKSIZE; 970 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 971 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 972 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 973 ~(NFS_DIRBLKSIZ - 1); 974 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 975 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 976 if (nmp->nm_readdirsize == 0) 977 nmp->nm_readdirsize = fsp->fs_rtmax; 978 } 979 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 980 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 981 if (fsp->fs_maxfilesize > 0 && 982 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 983 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 984 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 985 nmp->nm_state |= NFSSTA_GOTFSINFO; 986 } 987 988 /* 989 * Lookups source address which should be used to communicate with 990 * @nmp and stores it inside @pdst. 991 * 992 * Returns 0 on success. 993 */ 994 u_int8_t * 995 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 996 { 997 #if defined(INET6) || defined(INET) 998 int error, fibnum; 999 1000 fibnum = curthread->td_proc->p_fibnum; 1001 #endif 1002 #ifdef INET 1003 if (nmp->nm_nam->sa_family == AF_INET) { 1004 struct sockaddr_in *sin; 1005 struct nhop4_extended nh_ext; 1006 1007 sin = (struct sockaddr_in *)nmp->nm_nam; 1008 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1009 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 1010 &nh_ext); 1011 CURVNET_RESTORE(); 1012 if (error != 0) 1013 return (NULL); 1014 1015 if (IN_LOOPBACK(ntohl(nh_ext.nh_src.s_addr))) { 1016 /* Ignore loopback addresses */ 1017 return (NULL); 1018 } 1019 1020 *isinet6p = 0; 1021 *((struct in_addr *)paddr) = nh_ext.nh_src; 1022 1023 return (u_int8_t *)paddr; 1024 } 1025 #endif 1026 #ifdef INET6 1027 if (nmp->nm_nam->sa_family == AF_INET6) { 1028 struct sockaddr_in6 *sin6; 1029 1030 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1031 1032 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1033 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1034 sin6->sin6_scope_id, NULL, paddr, NULL); 1035 CURVNET_RESTORE(); 1036 if (error != 0) 1037 return (NULL); 1038 1039 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1040 return (NULL); 1041 1042 /* Scope is embedded in */ 1043 *isinet6p = 1; 1044 1045 return (u_int8_t *)paddr; 1046 } 1047 #endif 1048 return (NULL); 1049 } 1050 1051 /* 1052 * Copy NFS uid, gids from the cred structure. 1053 */ 1054 void 1055 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1056 { 1057 int i; 1058 1059 KASSERT(cr->cr_ngroups >= 0, 1060 ("newnfs_copyincred: negative cr_ngroups")); 1061 nfscr->nfsc_uid = cr->cr_uid; 1062 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1063 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1064 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1065 } 1066 1067 1068 /* 1069 * Do any client specific initialization. 1070 */ 1071 void 1072 nfscl_init(void) 1073 { 1074 static int inited = 0; 1075 1076 if (inited) 1077 return; 1078 inited = 1; 1079 nfscl_inited = 1; 1080 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1081 } 1082 1083 /* 1084 * Check each of the attributes to be set, to ensure they aren't already 1085 * the correct value. Disable setting ones already correct. 1086 */ 1087 int 1088 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1089 { 1090 1091 if (vap->va_mode != (mode_t)VNOVAL) { 1092 if (vap->va_mode == nvap->na_mode) 1093 vap->va_mode = (mode_t)VNOVAL; 1094 } 1095 if (vap->va_uid != (uid_t)VNOVAL) { 1096 if (vap->va_uid == nvap->na_uid) 1097 vap->va_uid = (uid_t)VNOVAL; 1098 } 1099 if (vap->va_gid != (gid_t)VNOVAL) { 1100 if (vap->va_gid == nvap->na_gid) 1101 vap->va_gid = (gid_t)VNOVAL; 1102 } 1103 if (vap->va_size != VNOVAL) { 1104 if (vap->va_size == nvap->na_size) 1105 vap->va_size = VNOVAL; 1106 } 1107 1108 /* 1109 * We are normally called with only a partially initialized 1110 * VAP. Since the NFSv3 spec says that server may use the 1111 * file attributes to store the verifier, the spec requires 1112 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1113 * in atime, but we can't really assume that all servers will 1114 * so we ensure that our SETATTR sets both atime and mtime. 1115 * Set the VA_UTIMES_NULL flag for this case, so that 1116 * the server's time will be used. This is needed to 1117 * work around a bug in some Solaris servers, where 1118 * setting the time TOCLIENT causes the Setattr RPC 1119 * to return NFS_OK, but not set va_mode. 1120 */ 1121 if (vap->va_mtime.tv_sec == VNOVAL) { 1122 vfs_timestamp(&vap->va_mtime); 1123 vap->va_vaflags |= VA_UTIMES_NULL; 1124 } 1125 if (vap->va_atime.tv_sec == VNOVAL) 1126 vap->va_atime = vap->va_mtime; 1127 return (1); 1128 } 1129 1130 /* 1131 * Map nfsv4 errors to errno.h errors. 1132 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1133 * error should only be returned for the Open, Create and Setattr Ops. 1134 * As such, most calls can just pass in 0 for those arguments. 1135 */ 1136 int 1137 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1138 { 1139 struct proc *p; 1140 1141 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1142 return (error); 1143 if (td != NULL) 1144 p = td->td_proc; 1145 else 1146 p = NULL; 1147 switch (error) { 1148 case NFSERR_BADOWNER: 1149 tprintf(p, LOG_INFO, 1150 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1151 uid, gid); 1152 return (EPERM); 1153 case NFSERR_BADNAME: 1154 case NFSERR_BADCHAR: 1155 printf("nfsv4 char/name not handled by server\n"); 1156 return (ENOENT); 1157 case NFSERR_STALECLIENTID: 1158 case NFSERR_STALESTATEID: 1159 case NFSERR_EXPIRED: 1160 case NFSERR_BADSTATEID: 1161 case NFSERR_BADSESSION: 1162 printf("nfsv4 recover err returned %d\n", error); 1163 return (EIO); 1164 case NFSERR_BADHANDLE: 1165 case NFSERR_SERVERFAULT: 1166 case NFSERR_BADTYPE: 1167 case NFSERR_FHEXPIRED: 1168 case NFSERR_RESOURCE: 1169 case NFSERR_MOVED: 1170 case NFSERR_NOFILEHANDLE: 1171 case NFSERR_MINORVERMISMATCH: 1172 case NFSERR_OLDSTATEID: 1173 case NFSERR_BADSEQID: 1174 case NFSERR_LEASEMOVED: 1175 case NFSERR_RECLAIMBAD: 1176 case NFSERR_BADXDR: 1177 case NFSERR_OPILLEGAL: 1178 printf("nfsv4 client/server protocol prob err=%d\n", 1179 error); 1180 return (EIO); 1181 default: 1182 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1183 return (EIO); 1184 }; 1185 } 1186 1187 /* 1188 * Check to see if the process for this owner exists. Return 1 if it doesn't 1189 * and 0 otherwise. 1190 */ 1191 int 1192 nfscl_procdoesntexist(u_int8_t *own) 1193 { 1194 union { 1195 u_int32_t lval; 1196 u_int8_t cval[4]; 1197 } tl; 1198 struct proc *p; 1199 pid_t pid; 1200 int i, ret = 0; 1201 1202 /* For the single open_owner of all 0 bytes, just return 0. */ 1203 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1204 if (own[i] != 0) 1205 break; 1206 if (i == NFSV4CL_LOCKNAMELEN) 1207 return (0); 1208 1209 tl.cval[0] = *own++; 1210 tl.cval[1] = *own++; 1211 tl.cval[2] = *own++; 1212 tl.cval[3] = *own++; 1213 pid = tl.lval; 1214 p = pfind_locked(pid); 1215 if (p == NULL) 1216 return (1); 1217 if (p->p_stats == NULL) { 1218 PROC_UNLOCK(p); 1219 return (0); 1220 } 1221 tl.cval[0] = *own++; 1222 tl.cval[1] = *own++; 1223 tl.cval[2] = *own++; 1224 tl.cval[3] = *own++; 1225 if (tl.lval != p->p_stats->p_start.tv_sec) { 1226 ret = 1; 1227 } else { 1228 tl.cval[0] = *own++; 1229 tl.cval[1] = *own++; 1230 tl.cval[2] = *own++; 1231 tl.cval[3] = *own; 1232 if (tl.lval != p->p_stats->p_start.tv_usec) 1233 ret = 1; 1234 } 1235 PROC_UNLOCK(p); 1236 return (ret); 1237 } 1238 1239 /* 1240 * - nfs pseudo system call for the client 1241 */ 1242 /* 1243 * MPSAFE 1244 */ 1245 static int 1246 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1247 { 1248 struct file *fp; 1249 struct nfscbd_args nfscbdarg; 1250 struct nfsd_nfscbd_args nfscbdarg2; 1251 struct nameidata nd; 1252 struct nfscl_dumpmntopts dumpmntopts; 1253 cap_rights_t rights; 1254 char *buf; 1255 int error; 1256 struct mount *mp; 1257 struct nfsmount *nmp; 1258 1259 if (uap->flag & NFSSVC_CBADDSOCK) { 1260 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1261 if (error) 1262 return (error); 1263 /* 1264 * Since we don't know what rights might be required, 1265 * pretend that we need them all. It is better to be too 1266 * careful than too reckless. 1267 */ 1268 error = fget(td, nfscbdarg.sock, 1269 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1270 if (error) 1271 return (error); 1272 if (fp->f_type != DTYPE_SOCKET) { 1273 fdrop(fp, td); 1274 return (EPERM); 1275 } 1276 error = nfscbd_addsock(fp); 1277 fdrop(fp, td); 1278 if (!error && nfscl_enablecallb == 0) { 1279 nfsv4_cbport = nfscbdarg.port; 1280 nfscl_enablecallb = 1; 1281 } 1282 } else if (uap->flag & NFSSVC_NFSCBD) { 1283 if (uap->argp == NULL) 1284 return (EINVAL); 1285 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1286 sizeof(nfscbdarg2)); 1287 if (error) 1288 return (error); 1289 error = nfscbd_nfsd(td, &nfscbdarg2); 1290 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1291 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1292 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1293 dumpmntopts.ndmnt_blen > 1024)) 1294 error = EINVAL; 1295 if (error == 0) 1296 error = nfsrv_lookupfilename(&nd, 1297 dumpmntopts.ndmnt_fname, td); 1298 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1299 "nfs") != 0) { 1300 vput(nd.ni_vp); 1301 error = EINVAL; 1302 } 1303 if (error == 0) { 1304 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK | 1305 M_ZERO); 1306 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1307 dumpmntopts.ndmnt_blen); 1308 vput(nd.ni_vp); 1309 error = copyout(buf, dumpmntopts.ndmnt_buf, 1310 dumpmntopts.ndmnt_blen); 1311 free(buf, M_TEMP); 1312 } 1313 } else if (uap->flag & NFSSVC_FORCEDISM) { 1314 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1315 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1316 if (error == 0) { 1317 nmp = NULL; 1318 mtx_lock(&mountlist_mtx); 1319 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1320 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1321 0 && strcmp(mp->mnt_stat.f_fstypename, 1322 "nfs") == 0 && mp->mnt_data != NULL) { 1323 nmp = VFSTONFS(mp); 1324 NFSDDSLOCK(); 1325 if (nfsv4_findmirror(nmp) != NULL) { 1326 NFSDDSUNLOCK(); 1327 error = ENXIO; 1328 nmp = NULL; 1329 break; 1330 } 1331 mtx_lock(&nmp->nm_mtx); 1332 if ((nmp->nm_privflag & 1333 NFSMNTP_FORCEDISM) == 0) { 1334 nmp->nm_privflag |= 1335 (NFSMNTP_FORCEDISM | 1336 NFSMNTP_CANCELRPCS); 1337 mtx_unlock(&nmp->nm_mtx); 1338 } else { 1339 mtx_unlock(&nmp->nm_mtx); 1340 nmp = NULL; 1341 } 1342 NFSDDSUNLOCK(); 1343 break; 1344 } 1345 } 1346 mtx_unlock(&mountlist_mtx); 1347 1348 if (nmp != NULL) { 1349 /* 1350 * Call newnfs_nmcancelreqs() to cause 1351 * any RPCs in progress on the mount point to 1352 * fail. 1353 * This will cause any process waiting for an 1354 * RPC to complete while holding a vnode lock 1355 * on the mounted-on vnode (such as "df" or 1356 * a non-forced "umount") to fail. 1357 * This will unlock the mounted-on vnode so 1358 * a forced dismount can succeed. 1359 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1360 * so that nfs_unmount() can complete. 1361 */ 1362 newnfs_nmcancelreqs(nmp); 1363 mtx_lock(&nmp->nm_mtx); 1364 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1365 wakeup(nmp); 1366 mtx_unlock(&nmp->nm_mtx); 1367 } else if (error == 0) 1368 error = EINVAL; 1369 } 1370 free(buf, M_TEMP); 1371 } else { 1372 error = EINVAL; 1373 } 1374 return (error); 1375 } 1376 1377 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1378 1379 /* 1380 * Called once to initialize data structures... 1381 */ 1382 static int 1383 nfscl_modevent(module_t mod, int type, void *data) 1384 { 1385 int error = 0; 1386 static int loaded = 0; 1387 1388 switch (type) { 1389 case MOD_LOAD: 1390 if (loaded) 1391 return (0); 1392 newnfs_portinit(); 1393 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1394 nfscl_init(); 1395 NFSD_LOCK(); 1396 nfsrvd_cbinit(0); 1397 NFSD_UNLOCK(); 1398 ncl_call_invalcaches = ncl_invalcaches; 1399 nfsd_call_nfscl = nfssvc_nfscl; 1400 loaded = 1; 1401 break; 1402 1403 case MOD_UNLOAD: 1404 if (nfs_numnfscbd != 0) { 1405 error = EBUSY; 1406 break; 1407 } 1408 1409 /* 1410 * XXX: Unloading of nfscl module is unsupported. 1411 */ 1412 #if 0 1413 ncl_call_invalcaches = NULL; 1414 nfsd_call_nfscl = NULL; 1415 /* and get rid of the mutexes */ 1416 mtx_destroy(&ncl_iod_mutex); 1417 loaded = 0; 1418 break; 1419 #else 1420 /* FALLTHROUGH */ 1421 #endif 1422 default: 1423 error = EOPNOTSUPP; 1424 break; 1425 } 1426 return error; 1427 } 1428 static moduledata_t nfscl_mod = { 1429 "nfscl", 1430 nfscl_modevent, 1431 NULL, 1432 }; 1433 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1434 1435 /* So that loader and kldload(2) can find us, wherever we are.. */ 1436 MODULE_VERSION(nfscl, 1); 1437 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1438 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1439 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1440 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1441
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