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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: releng/12.0/sys/fs/nfsclient/nfs_clport.c 335130 2018-06-14 10:00:19Z rmacklem $"); 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 np->n_fhp = nfhp; 251 /* 252 * For NFSv4, we have to attach the directory file handle and 253 * file name, so that Open Ops can be done later. 254 */ 255 if (nmp->nm_flag & NFSMNT_NFSV4) { 256 np->n_v4 = malloc(sizeof (struct nfsv4node) 257 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 258 M_WAITOK); 259 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 260 np->n_v4->n4_namelen = cnp->cn_namelen; 261 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 262 dnp->n_fhp->nfh_len); 263 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 264 cnp->cn_namelen); 265 } else { 266 np->n_v4 = NULL; 267 } 268 269 /* 270 * NFS supports recursive and shared locking. 271 */ 272 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 273 VN_LOCK_AREC(vp); 274 VN_LOCK_ASHARE(vp); 275 error = insmntque(vp, mntp); 276 if (error != 0) { 277 *npp = NULL; 278 mtx_destroy(&np->n_mtx); 279 lockdestroy(&np->n_excl); 280 free(nfhp, M_NFSFH); 281 if (np->n_v4 != NULL) 282 free(np->n_v4, M_NFSV4NODE); 283 uma_zfree(newnfsnode_zone, np); 284 return (error); 285 } 286 error = vfs_hash_insert(vp, hash, lkflags, 287 td, &nvp, newnfs_vncmpf, nfhp); 288 if (error) 289 return (error); 290 if (nvp != NULL) { 291 *npp = VTONFS(nvp); 292 /* vfs_hash_insert() vput()'s the losing vnode */ 293 return (0); 294 } 295 *npp = np; 296 297 return (0); 298 } 299 300 /* 301 * Another variant of nfs_nget(). This one is only used by reopen. It 302 * takes almost the same args as nfs_nget(), but only succeeds if an entry 303 * exists in the cache. (Since files should already be "open" with a 304 * vnode ref cnt on the node when reopen calls this, it should always 305 * succeed.) 306 * Also, don't get a vnode lock, since it may already be locked by some 307 * other process that is handling it. This is ok, since all other threads 308 * on the client are blocked by the nfsc_lock being exclusively held by the 309 * caller of this function. 310 */ 311 int 312 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 313 struct thread *td, struct nfsnode **npp) 314 { 315 struct vnode *nvp; 316 u_int hash; 317 struct nfsfh *nfhp; 318 int error; 319 320 *npp = NULL; 321 /* For forced dismounts, just return error. */ 322 if (NFSCL_FORCEDISM(mntp)) 323 return (EINTR); 324 nfhp = malloc(sizeof (struct nfsfh) + fhsize, 325 M_NFSFH, M_WAITOK); 326 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 327 nfhp->nfh_len = fhsize; 328 329 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 330 331 /* 332 * First, try to get the vnode locked, but don't block for the lock. 333 */ 334 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 335 newnfs_vncmpf, nfhp); 336 if (error == 0 && nvp != NULL) { 337 NFSVOPUNLOCK(nvp, 0); 338 } else if (error == EBUSY) { 339 /* 340 * It is safe so long as a vflush() with 341 * FORCECLOSE has not been done. Since the Renew thread is 342 * stopped and the MNTK_UNMOUNTF flag is set before doing 343 * a vflush() with FORCECLOSE, we should be ok here. 344 */ 345 if (NFSCL_FORCEDISM(mntp)) 346 error = EINTR; 347 else { 348 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 349 if (nvp == NULL) { 350 error = ENOENT; 351 } else if ((nvp->v_iflag & VI_DOOMED) != 0) { 352 error = ENOENT; 353 vrele(nvp); 354 } else { 355 error = 0; 356 } 357 } 358 } 359 free(nfhp, M_NFSFH); 360 if (error) 361 return (error); 362 if (nvp != NULL) { 363 *npp = VTONFS(nvp); 364 return (0); 365 } 366 return (EINVAL); 367 } 368 369 static void 370 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 371 struct nfsvattr *newnap) 372 { 373 int off; 374 375 if (ncl_fileid_maxwarnings >= 0 && 376 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 377 return; 378 off = 0; 379 if (ncl_fileid_maxwarnings >= 0) { 380 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 381 off = 1; 382 } 383 384 printf("newnfs: server '%s' error: fileid changed. " 385 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 386 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 387 nmp->nm_com.nmcom_hostname, 388 (uintmax_t)nmp->nm_fsid[0], 389 (uintmax_t)nmp->nm_fsid[1], 390 (uintmax_t)oldnap->na_fileid, 391 (uintmax_t)newnap->na_fileid); 392 393 if (off) 394 printf("newnfs: Logged %d times about fileid corruption; " 395 "going quiet to avoid spamming logs excessively. (Limit " 396 "is: %d).\n", ncl_fileid_nwarnings, 397 ncl_fileid_maxwarnings); 398 } 399 400 /* 401 * Load the attribute cache (that lives in the nfsnode entry) with 402 * the attributes of the second argument and 403 * Iff vaper not NULL 404 * copy the attributes to *vaper 405 * Similar to nfs_loadattrcache(), except the attributes are passed in 406 * instead of being parsed out of the mbuf list. 407 */ 408 int 409 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 410 void *stuff, int writeattr, int dontshrink) 411 { 412 struct vnode *vp = *vpp; 413 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 414 struct nfsnode *np; 415 struct nfsmount *nmp; 416 struct timespec mtime_save; 417 u_quad_t nsize; 418 int setnsize, error, force_fid_err; 419 420 error = 0; 421 setnsize = 0; 422 nsize = 0; 423 424 /* 425 * If v_type == VNON it is a new node, so fill in the v_type, 426 * n_mtime fields. Check to see if it represents a special 427 * device, and if so, check for a possible alias. Once the 428 * correct vnode has been obtained, fill in the rest of the 429 * information. 430 */ 431 np = VTONFS(vp); 432 NFSLOCKNODE(np); 433 if (vp->v_type != nvap->va_type) { 434 vp->v_type = nvap->va_type; 435 if (vp->v_type == VFIFO) 436 vp->v_op = &newnfs_fifoops; 437 np->n_mtime = nvap->va_mtime; 438 } 439 nmp = VFSTONFS(vp->v_mount); 440 vap = &np->n_vattr.na_vattr; 441 mtime_save = vap->va_mtime; 442 if (writeattr) { 443 np->n_vattr.na_filerev = nap->na_filerev; 444 np->n_vattr.na_size = nap->na_size; 445 np->n_vattr.na_mtime = nap->na_mtime; 446 np->n_vattr.na_ctime = nap->na_ctime; 447 np->n_vattr.na_fsid = nap->na_fsid; 448 np->n_vattr.na_mode = nap->na_mode; 449 } else { 450 force_fid_err = 0; 451 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 452 force_fid_err); 453 /* 454 * BROKEN NFS SERVER OR MIDDLEWARE 455 * 456 * Certain NFS servers (certain old proprietary filers ca. 457 * 2006) or broken middleboxes (e.g. WAN accelerator products) 458 * will respond to GETATTR requests with results for a 459 * different fileid. 460 * 461 * The WAN accelerator we've observed not only serves stale 462 * cache results for a given file, it also occasionally serves 463 * results for wholly different files. This causes surprising 464 * problems; for example the cached size attribute of a file 465 * may truncate down and then back up, resulting in zero 466 * regions in file contents read by applications. We observed 467 * this reliably with Clang and .c files during parallel build. 468 * A pcap revealed packet fragmentation and GETATTR RPC 469 * responses with wholly wrong fileids. 470 */ 471 if ((np->n_vattr.na_fileid != 0 && 472 np->n_vattr.na_fileid != nap->na_fileid) || 473 force_fid_err) { 474 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 475 error = EIDRM; 476 goto out; 477 } 478 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 479 sizeof (struct nfsvattr)); 480 } 481 482 /* 483 * For NFSv4, if the node's fsid is not equal to the mount point's 484 * fsid, return the low order 32bits of the node's fsid. This 485 * allows getcwd(3) to work. There is a chance that the fsid might 486 * be the same as a local fs, but since this is in an NFS mount 487 * point, I don't think that will cause any problems? 488 */ 489 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 490 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 491 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 492 /* 493 * va_fsid needs to be set to some value derived from 494 * np->n_vattr.na_filesid that is not equal 495 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 496 * from the value used for the top level server volume 497 * in the mounted subtree. 498 */ 499 vn_fsid(vp, vap); 500 if ((uint32_t)vap->va_fsid == np->n_vattr.na_filesid[0]) 501 vap->va_fsid = hash32_buf( 502 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 503 } else 504 vn_fsid(vp, vap); 505 np->n_attrstamp = time_second; 506 if (vap->va_size != np->n_size) { 507 if (vap->va_type == VREG) { 508 if (dontshrink && vap->va_size < np->n_size) { 509 /* 510 * We've been told not to shrink the file; 511 * zero np->n_attrstamp to indicate that 512 * the attributes are stale. 513 */ 514 vap->va_size = np->n_size; 515 np->n_attrstamp = 0; 516 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 517 vnode_pager_setsize(vp, np->n_size); 518 } else if (np->n_flag & NMODIFIED) { 519 /* 520 * We've modified the file: Use the larger 521 * of our size, and the server's size. 522 */ 523 if (vap->va_size < np->n_size) { 524 vap->va_size = np->n_size; 525 } else { 526 np->n_size = vap->va_size; 527 np->n_flag |= NSIZECHANGED; 528 } 529 vnode_pager_setsize(vp, np->n_size); 530 } else if (vap->va_size < np->n_size) { 531 /* 532 * When shrinking the size, the call to 533 * vnode_pager_setsize() cannot be done 534 * with the mutex held, so delay it until 535 * after the mtx_unlock call. 536 */ 537 nsize = np->n_size = vap->va_size; 538 np->n_flag |= NSIZECHANGED; 539 setnsize = 1; 540 } else { 541 np->n_size = vap->va_size; 542 np->n_flag |= NSIZECHANGED; 543 vnode_pager_setsize(vp, np->n_size); 544 } 545 } else { 546 np->n_size = vap->va_size; 547 } 548 } 549 /* 550 * The following checks are added to prevent a race between (say) 551 * a READDIR+ and a WRITE. 552 * READDIR+, WRITE requests sent out. 553 * READDIR+ resp, WRITE resp received on client. 554 * However, the WRITE resp was handled before the READDIR+ resp 555 * causing the post op attrs from the write to be loaded first 556 * and the attrs from the READDIR+ to be loaded later. If this 557 * happens, we have stale attrs loaded into the attrcache. 558 * We detect this by for the mtime moving back. We invalidate the 559 * attrcache when this happens. 560 */ 561 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 562 /* Size changed or mtime went backwards */ 563 np->n_attrstamp = 0; 564 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 565 } 566 if (vaper != NULL) { 567 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 568 if (np->n_flag & NCHG) { 569 if (np->n_flag & NACC) 570 vaper->va_atime = np->n_atim; 571 if (np->n_flag & NUPD) 572 vaper->va_mtime = np->n_mtim; 573 } 574 } 575 576 out: 577 #ifdef KDTRACE_HOOKS 578 if (np->n_attrstamp != 0) 579 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 580 #endif 581 NFSUNLOCKNODE(np); 582 if (setnsize) 583 vnode_pager_setsize(vp, nsize); 584 return (error); 585 } 586 587 /* 588 * Fill in the client id name. For these bytes: 589 * 1 - they must be unique 590 * 2 - they should be persistent across client reboots 591 * 1 is more critical than 2 592 * Use the mount point's unique id plus either the uuid or, if that 593 * isn't set, random junk. 594 */ 595 void 596 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 597 { 598 int uuidlen; 599 600 /* 601 * First, put in the 64bit mount point identifier. 602 */ 603 if (idlen >= sizeof (u_int64_t)) { 604 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 605 cp += sizeof (u_int64_t); 606 idlen -= sizeof (u_int64_t); 607 } 608 609 /* 610 * If uuid is non-zero length, use it. 611 */ 612 uuidlen = strlen(uuid); 613 if (uuidlen > 0 && idlen >= uuidlen) { 614 NFSBCOPY(uuid, cp, uuidlen); 615 cp += uuidlen; 616 idlen -= uuidlen; 617 } 618 619 /* 620 * This only normally happens if the uuid isn't set. 621 */ 622 while (idlen > 0) { 623 *cp++ = (u_int8_t)(arc4random() % 256); 624 idlen--; 625 } 626 } 627 628 /* 629 * Fill in a lock owner name. For now, pid + the process's creation time. 630 */ 631 void 632 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 633 { 634 union { 635 u_int32_t lval; 636 u_int8_t cval[4]; 637 } tl; 638 struct proc *p; 639 640 if (id == NULL) { 641 /* Return the single open_owner of all 0 bytes. */ 642 bzero(cp, NFSV4CL_LOCKNAMELEN); 643 return; 644 } 645 if ((flags & F_POSIX) != 0) { 646 p = (struct proc *)id; 647 tl.lval = p->p_pid; 648 *cp++ = tl.cval[0]; 649 *cp++ = tl.cval[1]; 650 *cp++ = tl.cval[2]; 651 *cp++ = tl.cval[3]; 652 tl.lval = p->p_stats->p_start.tv_sec; 653 *cp++ = tl.cval[0]; 654 *cp++ = tl.cval[1]; 655 *cp++ = tl.cval[2]; 656 *cp++ = tl.cval[3]; 657 tl.lval = p->p_stats->p_start.tv_usec; 658 *cp++ = tl.cval[0]; 659 *cp++ = tl.cval[1]; 660 *cp++ = tl.cval[2]; 661 *cp = tl.cval[3]; 662 } else if ((flags & F_FLOCK) != 0) { 663 bcopy(&id, cp, sizeof(id)); 664 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 665 } else { 666 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 667 bzero(cp, NFSV4CL_LOCKNAMELEN); 668 } 669 } 670 671 /* 672 * Find the parent process for the thread passed in as an argument. 673 * If none exists, return NULL, otherwise return a thread for the parent. 674 * (Can be any of the threads, since it is only used for td->td_proc.) 675 */ 676 NFSPROC_T * 677 nfscl_getparent(struct thread *td) 678 { 679 struct proc *p; 680 struct thread *ptd; 681 682 if (td == NULL) 683 return (NULL); 684 p = td->td_proc; 685 if (p->p_pid == 0) 686 return (NULL); 687 p = p->p_pptr; 688 if (p == NULL) 689 return (NULL); 690 ptd = TAILQ_FIRST(&p->p_threads); 691 return (ptd); 692 } 693 694 /* 695 * Start up the renew kernel thread. 696 */ 697 static void 698 start_nfscl(void *arg) 699 { 700 struct nfsclclient *clp; 701 struct thread *td; 702 703 clp = (struct nfsclclient *)arg; 704 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 705 nfscl_renewthread(clp, td); 706 kproc_exit(0); 707 } 708 709 void 710 nfscl_start_renewthread(struct nfsclclient *clp) 711 { 712 713 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 714 "nfscl"); 715 } 716 717 /* 718 * Handle wcc_data. 719 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 720 * as the first Op after PutFH. 721 * (For NFSv4, the postop attributes are after the Op, so they can't be 722 * parsed here. A separate call to nfscl_postop_attr() is required.) 723 */ 724 int 725 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 726 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 727 { 728 u_int32_t *tl; 729 struct nfsnode *np = VTONFS(vp); 730 struct nfsvattr nfsva; 731 int error = 0; 732 733 if (wccflagp != NULL) 734 *wccflagp = 0; 735 if (nd->nd_flag & ND_NFSV3) { 736 *flagp = 0; 737 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 738 if (*tl == newnfs_true) { 739 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 740 if (wccflagp != NULL) { 741 mtx_lock(&np->n_mtx); 742 *wccflagp = (np->n_mtime.tv_sec == 743 fxdr_unsigned(u_int32_t, *(tl + 2)) && 744 np->n_mtime.tv_nsec == 745 fxdr_unsigned(u_int32_t, *(tl + 3))); 746 mtx_unlock(&np->n_mtx); 747 } 748 } 749 error = nfscl_postop_attr(nd, nap, flagp, stuff); 750 if (wccflagp != NULL && *flagp == 0) 751 *wccflagp = 0; 752 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 753 == (ND_NFSV4 | ND_V4WCCATTR)) { 754 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 755 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 756 NULL, NULL, NULL, NULL, NULL); 757 if (error) 758 return (error); 759 /* 760 * Get rid of Op# and status for next op. 761 */ 762 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 763 if (*++tl) 764 nd->nd_flag |= ND_NOMOREDATA; 765 if (wccflagp != NULL && 766 nfsva.na_vattr.va_mtime.tv_sec != 0) { 767 mtx_lock(&np->n_mtx); 768 *wccflagp = (np->n_mtime.tv_sec == 769 nfsva.na_vattr.va_mtime.tv_sec && 770 np->n_mtime.tv_nsec == 771 nfsva.na_vattr.va_mtime.tv_sec); 772 mtx_unlock(&np->n_mtx); 773 } 774 } 775 nfsmout: 776 return (error); 777 } 778 779 /* 780 * Get postop attributes. 781 */ 782 int 783 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 784 void *stuff) 785 { 786 u_int32_t *tl; 787 int error = 0; 788 789 *retp = 0; 790 if (nd->nd_flag & ND_NOMOREDATA) 791 return (error); 792 if (nd->nd_flag & ND_NFSV3) { 793 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 794 *retp = fxdr_unsigned(int, *tl); 795 } else if (nd->nd_flag & ND_NFSV4) { 796 /* 797 * For NFSv4, the postop attr are at the end, so no point 798 * in looking if nd_repstat != 0. 799 */ 800 if (!nd->nd_repstat) { 801 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 802 if (*(tl + 1)) 803 /* should never happen since nd_repstat != 0 */ 804 nd->nd_flag |= ND_NOMOREDATA; 805 else 806 *retp = 1; 807 } 808 } else if (!nd->nd_repstat) { 809 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 810 *retp = 1; 811 } 812 if (*retp) { 813 error = nfsm_loadattr(nd, nap); 814 if (error) 815 *retp = 0; 816 } 817 nfsmout: 818 return (error); 819 } 820 821 /* 822 * nfscl_request() - mostly a wrapper for newnfs_request(). 823 */ 824 int 825 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 826 struct ucred *cred, void *stuff) 827 { 828 int ret, vers; 829 struct nfsmount *nmp; 830 831 nmp = VFSTONFS(vp->v_mount); 832 if (nd->nd_flag & ND_NFSV4) 833 vers = NFS_VER4; 834 else if (nd->nd_flag & ND_NFSV3) 835 vers = NFS_VER3; 836 else 837 vers = NFS_VER2; 838 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 839 NFS_PROG, vers, NULL, 1, NULL, NULL); 840 return (ret); 841 } 842 843 /* 844 * fill in this bsden's variant of statfs using nfsstatfs. 845 */ 846 void 847 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 848 { 849 struct statfs *sbp = (struct statfs *)statfs; 850 851 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 852 sbp->f_bsize = NFS_FABLKSIZE; 853 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 854 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 855 /* 856 * Although sf_abytes is uint64_t and f_bavail is int64_t, 857 * the value after dividing by NFS_FABLKSIZE is small 858 * enough that it will fit in 63bits, so it is ok to 859 * assign it to f_bavail without fear that it will become 860 * negative. 861 */ 862 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 863 sbp->f_files = sfp->sf_tfiles; 864 /* Since f_ffree is int64_t, clip it to 63bits. */ 865 if (sfp->sf_ffiles > INT64_MAX) 866 sbp->f_ffree = INT64_MAX; 867 else 868 sbp->f_ffree = sfp->sf_ffiles; 869 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 870 /* 871 * The type casts to (int32_t) ensure that this code is 872 * compatible with the old NFS client, in that it will 873 * propagate bit31 to the high order bits. This may or may 874 * not be correct for NFSv2, but since it is a legacy 875 * environment, I'd rather retain backwards compatibility. 876 */ 877 sbp->f_bsize = (int32_t)sfp->sf_bsize; 878 sbp->f_blocks = (int32_t)sfp->sf_blocks; 879 sbp->f_bfree = (int32_t)sfp->sf_bfree; 880 sbp->f_bavail = (int32_t)sfp->sf_bavail; 881 sbp->f_files = 0; 882 sbp->f_ffree = 0; 883 } 884 } 885 886 /* 887 * Use the fsinfo stuff to update the mount point. 888 */ 889 void 890 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 891 { 892 893 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 894 fsp->fs_wtpref >= NFS_FABLKSIZE) 895 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 896 ~(NFS_FABLKSIZE - 1); 897 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 898 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 899 if (nmp->nm_wsize == 0) 900 nmp->nm_wsize = fsp->fs_wtmax; 901 } 902 if (nmp->nm_wsize < NFS_FABLKSIZE) 903 nmp->nm_wsize = NFS_FABLKSIZE; 904 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 905 fsp->fs_rtpref >= NFS_FABLKSIZE) 906 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 907 ~(NFS_FABLKSIZE - 1); 908 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 909 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 910 if (nmp->nm_rsize == 0) 911 nmp->nm_rsize = fsp->fs_rtmax; 912 } 913 if (nmp->nm_rsize < NFS_FABLKSIZE) 914 nmp->nm_rsize = NFS_FABLKSIZE; 915 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 916 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 917 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 918 ~(NFS_DIRBLKSIZ - 1); 919 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 920 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 921 if (nmp->nm_readdirsize == 0) 922 nmp->nm_readdirsize = fsp->fs_rtmax; 923 } 924 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 925 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 926 if (fsp->fs_maxfilesize > 0 && 927 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 928 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 929 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 930 nmp->nm_state |= NFSSTA_GOTFSINFO; 931 } 932 933 /* 934 * Lookups source address which should be used to communicate with 935 * @nmp and stores it inside @pdst. 936 * 937 * Returns 0 on success. 938 */ 939 u_int8_t * 940 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 941 { 942 #if defined(INET6) || defined(INET) 943 int error, fibnum; 944 945 fibnum = curthread->td_proc->p_fibnum; 946 #endif 947 #ifdef INET 948 if (nmp->nm_nam->sa_family == AF_INET) { 949 struct sockaddr_in *sin; 950 struct nhop4_extended nh_ext; 951 952 sin = (struct sockaddr_in *)nmp->nm_nam; 953 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 954 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 955 &nh_ext); 956 CURVNET_RESTORE(); 957 if (error != 0) 958 return (NULL); 959 960 if ((ntohl(nh_ext.nh_src.s_addr) >> IN_CLASSA_NSHIFT) == 961 IN_LOOPBACKNET) { 962 /* Ignore loopback addresses */ 963 return (NULL); 964 } 965 966 *isinet6p = 0; 967 *((struct in_addr *)paddr) = nh_ext.nh_src; 968 969 return (u_int8_t *)paddr; 970 } 971 #endif 972 #ifdef INET6 973 if (nmp->nm_nam->sa_family == AF_INET6) { 974 struct sockaddr_in6 *sin6; 975 976 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 977 978 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 979 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 980 sin6->sin6_scope_id, NULL, paddr, NULL); 981 CURVNET_RESTORE(); 982 if (error != 0) 983 return (NULL); 984 985 if (IN6_IS_ADDR_LOOPBACK(paddr)) 986 return (NULL); 987 988 /* Scope is embedded in */ 989 *isinet6p = 1; 990 991 return (u_int8_t *)paddr; 992 } 993 #endif 994 return (NULL); 995 } 996 997 /* 998 * Copy NFS uid, gids from the cred structure. 999 */ 1000 void 1001 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1002 { 1003 int i; 1004 1005 KASSERT(cr->cr_ngroups >= 0, 1006 ("newnfs_copyincred: negative cr_ngroups")); 1007 nfscr->nfsc_uid = cr->cr_uid; 1008 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1009 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1010 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1011 } 1012 1013 1014 /* 1015 * Do any client specific initialization. 1016 */ 1017 void 1018 nfscl_init(void) 1019 { 1020 static int inited = 0; 1021 1022 if (inited) 1023 return; 1024 inited = 1; 1025 nfscl_inited = 1; 1026 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1027 } 1028 1029 /* 1030 * Check each of the attributes to be set, to ensure they aren't already 1031 * the correct value. Disable setting ones already correct. 1032 */ 1033 int 1034 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1035 { 1036 1037 if (vap->va_mode != (mode_t)VNOVAL) { 1038 if (vap->va_mode == nvap->na_mode) 1039 vap->va_mode = (mode_t)VNOVAL; 1040 } 1041 if (vap->va_uid != (uid_t)VNOVAL) { 1042 if (vap->va_uid == nvap->na_uid) 1043 vap->va_uid = (uid_t)VNOVAL; 1044 } 1045 if (vap->va_gid != (gid_t)VNOVAL) { 1046 if (vap->va_gid == nvap->na_gid) 1047 vap->va_gid = (gid_t)VNOVAL; 1048 } 1049 if (vap->va_size != VNOVAL) { 1050 if (vap->va_size == nvap->na_size) 1051 vap->va_size = VNOVAL; 1052 } 1053 1054 /* 1055 * We are normally called with only a partially initialized 1056 * VAP. Since the NFSv3 spec says that server may use the 1057 * file attributes to store the verifier, the spec requires 1058 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1059 * in atime, but we can't really assume that all servers will 1060 * so we ensure that our SETATTR sets both atime and mtime. 1061 * Set the VA_UTIMES_NULL flag for this case, so that 1062 * the server's time will be used. This is needed to 1063 * work around a bug in some Solaris servers, where 1064 * setting the time TOCLIENT causes the Setattr RPC 1065 * to return NFS_OK, but not set va_mode. 1066 */ 1067 if (vap->va_mtime.tv_sec == VNOVAL) { 1068 vfs_timestamp(&vap->va_mtime); 1069 vap->va_vaflags |= VA_UTIMES_NULL; 1070 } 1071 if (vap->va_atime.tv_sec == VNOVAL) 1072 vap->va_atime = vap->va_mtime; 1073 return (1); 1074 } 1075 1076 /* 1077 * Map nfsv4 errors to errno.h errors. 1078 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1079 * error should only be returned for the Open, Create and Setattr Ops. 1080 * As such, most calls can just pass in 0 for those arguments. 1081 */ 1082 APPLESTATIC int 1083 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1084 { 1085 struct proc *p; 1086 1087 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1088 return (error); 1089 if (td != NULL) 1090 p = td->td_proc; 1091 else 1092 p = NULL; 1093 switch (error) { 1094 case NFSERR_BADOWNER: 1095 tprintf(p, LOG_INFO, 1096 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1097 uid, gid); 1098 return (EPERM); 1099 case NFSERR_BADNAME: 1100 case NFSERR_BADCHAR: 1101 printf("nfsv4 char/name not handled by server\n"); 1102 return (ENOENT); 1103 case NFSERR_STALECLIENTID: 1104 case NFSERR_STALESTATEID: 1105 case NFSERR_EXPIRED: 1106 case NFSERR_BADSTATEID: 1107 case NFSERR_BADSESSION: 1108 printf("nfsv4 recover err returned %d\n", error); 1109 return (EIO); 1110 case NFSERR_BADHANDLE: 1111 case NFSERR_SERVERFAULT: 1112 case NFSERR_BADTYPE: 1113 case NFSERR_FHEXPIRED: 1114 case NFSERR_RESOURCE: 1115 case NFSERR_MOVED: 1116 case NFSERR_NOFILEHANDLE: 1117 case NFSERR_MINORVERMISMATCH: 1118 case NFSERR_OLDSTATEID: 1119 case NFSERR_BADSEQID: 1120 case NFSERR_LEASEMOVED: 1121 case NFSERR_RECLAIMBAD: 1122 case NFSERR_BADXDR: 1123 case NFSERR_OPILLEGAL: 1124 printf("nfsv4 client/server protocol prob err=%d\n", 1125 error); 1126 return (EIO); 1127 default: 1128 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1129 return (EIO); 1130 }; 1131 } 1132 1133 /* 1134 * Check to see if the process for this owner exists. Return 1 if it doesn't 1135 * and 0 otherwise. 1136 */ 1137 int 1138 nfscl_procdoesntexist(u_int8_t *own) 1139 { 1140 union { 1141 u_int32_t lval; 1142 u_int8_t cval[4]; 1143 } tl; 1144 struct proc *p; 1145 pid_t pid; 1146 int i, ret = 0; 1147 1148 /* For the single open_owner of all 0 bytes, just return 0. */ 1149 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1150 if (own[i] != 0) 1151 break; 1152 if (i == NFSV4CL_LOCKNAMELEN) 1153 return (0); 1154 1155 tl.cval[0] = *own++; 1156 tl.cval[1] = *own++; 1157 tl.cval[2] = *own++; 1158 tl.cval[3] = *own++; 1159 pid = tl.lval; 1160 p = pfind_locked(pid); 1161 if (p == NULL) 1162 return (1); 1163 if (p->p_stats == NULL) { 1164 PROC_UNLOCK(p); 1165 return (0); 1166 } 1167 tl.cval[0] = *own++; 1168 tl.cval[1] = *own++; 1169 tl.cval[2] = *own++; 1170 tl.cval[3] = *own++; 1171 if (tl.lval != p->p_stats->p_start.tv_sec) { 1172 ret = 1; 1173 } else { 1174 tl.cval[0] = *own++; 1175 tl.cval[1] = *own++; 1176 tl.cval[2] = *own++; 1177 tl.cval[3] = *own; 1178 if (tl.lval != p->p_stats->p_start.tv_usec) 1179 ret = 1; 1180 } 1181 PROC_UNLOCK(p); 1182 return (ret); 1183 } 1184 1185 /* 1186 * - nfs pseudo system call for the client 1187 */ 1188 /* 1189 * MPSAFE 1190 */ 1191 static int 1192 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1193 { 1194 struct file *fp; 1195 struct nfscbd_args nfscbdarg; 1196 struct nfsd_nfscbd_args nfscbdarg2; 1197 struct nameidata nd; 1198 struct nfscl_dumpmntopts dumpmntopts; 1199 cap_rights_t rights; 1200 char *buf; 1201 int error; 1202 struct mount *mp; 1203 struct nfsmount *nmp; 1204 1205 if (uap->flag & NFSSVC_CBADDSOCK) { 1206 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1207 if (error) 1208 return (error); 1209 /* 1210 * Since we don't know what rights might be required, 1211 * pretend that we need them all. It is better to be too 1212 * careful than too reckless. 1213 */ 1214 error = fget(td, nfscbdarg.sock, 1215 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1216 if (error) 1217 return (error); 1218 if (fp->f_type != DTYPE_SOCKET) { 1219 fdrop(fp, td); 1220 return (EPERM); 1221 } 1222 error = nfscbd_addsock(fp); 1223 fdrop(fp, td); 1224 if (!error && nfscl_enablecallb == 0) { 1225 nfsv4_cbport = nfscbdarg.port; 1226 nfscl_enablecallb = 1; 1227 } 1228 } else if (uap->flag & NFSSVC_NFSCBD) { 1229 if (uap->argp == NULL) 1230 return (EINVAL); 1231 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1232 sizeof(nfscbdarg2)); 1233 if (error) 1234 return (error); 1235 error = nfscbd_nfsd(td, &nfscbdarg2); 1236 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1237 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1238 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1239 dumpmntopts.ndmnt_blen > 1024)) 1240 error = EINVAL; 1241 if (error == 0) 1242 error = nfsrv_lookupfilename(&nd, 1243 dumpmntopts.ndmnt_fname, td); 1244 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1245 "nfs") != 0) { 1246 vput(nd.ni_vp); 1247 error = EINVAL; 1248 } 1249 if (error == 0) { 1250 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1251 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1252 dumpmntopts.ndmnt_blen); 1253 vput(nd.ni_vp); 1254 error = copyout(buf, dumpmntopts.ndmnt_buf, 1255 dumpmntopts.ndmnt_blen); 1256 free(buf, M_TEMP); 1257 } 1258 } else if (uap->flag & NFSSVC_FORCEDISM) { 1259 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1260 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1261 if (error == 0) { 1262 nmp = NULL; 1263 mtx_lock(&mountlist_mtx); 1264 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1265 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1266 0 && strcmp(mp->mnt_stat.f_fstypename, 1267 "nfs") == 0 && mp->mnt_data != NULL) { 1268 nmp = VFSTONFS(mp); 1269 NFSDDSLOCK(); 1270 if (nfsv4_findmirror(nmp) != NULL) { 1271 NFSDDSUNLOCK(); 1272 error = ENXIO; 1273 nmp = NULL; 1274 break; 1275 } 1276 mtx_lock(&nmp->nm_mtx); 1277 if ((nmp->nm_privflag & 1278 NFSMNTP_FORCEDISM) == 0) { 1279 nmp->nm_privflag |= 1280 (NFSMNTP_FORCEDISM | 1281 NFSMNTP_CANCELRPCS); 1282 mtx_unlock(&nmp->nm_mtx); 1283 } else { 1284 mtx_unlock(&nmp->nm_mtx); 1285 nmp = NULL; 1286 } 1287 NFSDDSUNLOCK(); 1288 break; 1289 } 1290 } 1291 mtx_unlock(&mountlist_mtx); 1292 1293 if (nmp != NULL) { 1294 /* 1295 * Call newnfs_nmcancelreqs() to cause 1296 * any RPCs in progress on the mount point to 1297 * fail. 1298 * This will cause any process waiting for an 1299 * RPC to complete while holding a vnode lock 1300 * on the mounted-on vnode (such as "df" or 1301 * a non-forced "umount") to fail. 1302 * This will unlock the mounted-on vnode so 1303 * a forced dismount can succeed. 1304 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1305 * so that nfs_unmount() can complete. 1306 */ 1307 newnfs_nmcancelreqs(nmp); 1308 mtx_lock(&nmp->nm_mtx); 1309 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1310 wakeup(nmp); 1311 mtx_unlock(&nmp->nm_mtx); 1312 } else if (error == 0) 1313 error = EINVAL; 1314 } 1315 free(buf, M_TEMP); 1316 } else { 1317 error = EINVAL; 1318 } 1319 return (error); 1320 } 1321 1322 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1323 1324 /* 1325 * Called once to initialize data structures... 1326 */ 1327 static int 1328 nfscl_modevent(module_t mod, int type, void *data) 1329 { 1330 int error = 0; 1331 static int loaded = 0; 1332 1333 switch (type) { 1334 case MOD_LOAD: 1335 if (loaded) 1336 return (0); 1337 newnfs_portinit(); 1338 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1339 nfscl_init(); 1340 NFSD_LOCK(); 1341 nfsrvd_cbinit(0); 1342 NFSD_UNLOCK(); 1343 ncl_call_invalcaches = ncl_invalcaches; 1344 nfsd_call_nfscl = nfssvc_nfscl; 1345 loaded = 1; 1346 break; 1347 1348 case MOD_UNLOAD: 1349 if (nfs_numnfscbd != 0) { 1350 error = EBUSY; 1351 break; 1352 } 1353 1354 /* 1355 * XXX: Unloading of nfscl module is unsupported. 1356 */ 1357 #if 0 1358 ncl_call_invalcaches = NULL; 1359 nfsd_call_nfscl = NULL; 1360 /* and get rid of the mutexes */ 1361 mtx_destroy(&ncl_iod_mutex); 1362 loaded = 0; 1363 break; 1364 #else 1365 /* FALLTHROUGH */ 1366 #endif 1367 default: 1368 error = EOPNOTSUPP; 1369 break; 1370 } 1371 return error; 1372 } 1373 static moduledata_t nfscl_mod = { 1374 "nfscl", 1375 nfscl_modevent, 1376 NULL, 1377 }; 1378 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1379 1380 /* So that loader and kldload(2) can find us, wherever we are.. */ 1381 MODULE_VERSION(nfscl, 1); 1382 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1383 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1384 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1385 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1386
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