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 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 vm_object_t object; 418 u_quad_t nsize; 419 int error, force_fid_err; 420 bool setnsize; 421 422 error = 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 } else if (np->n_flag & NMODIFIED) { 518 /* 519 * We've modified the file: Use the larger 520 * of our size, and the server's size. 521 */ 522 if (vap->va_size < np->n_size) { 523 vap->va_size = np->n_size; 524 } else { 525 np->n_size = vap->va_size; 526 np->n_flag |= NSIZECHANGED; 527 } 528 } else { 529 np->n_size = vap->va_size; 530 np->n_flag |= NSIZECHANGED; 531 } 532 } else { 533 np->n_size = vap->va_size; 534 } 535 } 536 /* 537 * The following checks are added to prevent a race between (say) 538 * a READDIR+ and a WRITE. 539 * READDIR+, WRITE requests sent out. 540 * READDIR+ resp, WRITE resp received on client. 541 * However, the WRITE resp was handled before the READDIR+ resp 542 * causing the post op attrs from the write to be loaded first 543 * and the attrs from the READDIR+ to be loaded later. If this 544 * happens, we have stale attrs loaded into the attrcache. 545 * We detect this by for the mtime moving back. We invalidate the 546 * attrcache when this happens. 547 */ 548 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 549 /* Size changed or mtime went backwards */ 550 np->n_attrstamp = 0; 551 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 552 } 553 if (vaper != NULL) { 554 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 555 if (np->n_flag & NCHG) { 556 if (np->n_flag & NACC) 557 vaper->va_atime = np->n_atim; 558 if (np->n_flag & NUPD) 559 vaper->va_mtime = np->n_mtim; 560 } 561 } 562 563 out: 564 #ifdef KDTRACE_HOOKS 565 if (np->n_attrstamp != 0) 566 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 567 #endif 568 nsize = vap->va_size; 569 object = vp->v_object; 570 setnsize = false; 571 if (object != NULL) { 572 if (OFF_TO_IDX(nsize + PAGE_MASK) < object->size) { 573 /* 574 * When shrinking the size, the call to 575 * vnode_pager_setsize() cannot be done with 576 * the mutex held, because we might need to 577 * wait for a busy page. Delay it until after 578 * the node is unlocked. 579 */ 580 setnsize = true; 581 } else { 582 vnode_pager_setsize(vp, nsize); 583 } 584 } 585 NFSUNLOCKNODE(np); 586 if (setnsize) 587 vnode_pager_setsize(vp, nsize); 588 return (error); 589 } 590 591 /* 592 * Fill in the client id name. For these bytes: 593 * 1 - they must be unique 594 * 2 - they should be persistent across client reboots 595 * 1 is more critical than 2 596 * Use the mount point's unique id plus either the uuid or, if that 597 * isn't set, random junk. 598 */ 599 void 600 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 601 { 602 int uuidlen; 603 604 /* 605 * First, put in the 64bit mount point identifier. 606 */ 607 if (idlen >= sizeof (u_int64_t)) { 608 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 609 cp += sizeof (u_int64_t); 610 idlen -= sizeof (u_int64_t); 611 } 612 613 /* 614 * If uuid is non-zero length, use it. 615 */ 616 uuidlen = strlen(uuid); 617 if (uuidlen > 0 && idlen >= uuidlen) { 618 NFSBCOPY(uuid, cp, uuidlen); 619 cp += uuidlen; 620 idlen -= uuidlen; 621 } 622 623 /* 624 * This only normally happens if the uuid isn't set. 625 */ 626 while (idlen > 0) { 627 *cp++ = (u_int8_t)(arc4random() % 256); 628 idlen--; 629 } 630 } 631 632 /* 633 * Fill in a lock owner name. For now, pid + the process's creation time. 634 */ 635 void 636 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 637 { 638 union { 639 u_int32_t lval; 640 u_int8_t cval[4]; 641 } tl; 642 struct proc *p; 643 644 if (id == NULL) { 645 /* Return the single open_owner of all 0 bytes. */ 646 bzero(cp, NFSV4CL_LOCKNAMELEN); 647 return; 648 } 649 if ((flags & F_POSIX) != 0) { 650 p = (struct proc *)id; 651 tl.lval = p->p_pid; 652 *cp++ = tl.cval[0]; 653 *cp++ = tl.cval[1]; 654 *cp++ = tl.cval[2]; 655 *cp++ = tl.cval[3]; 656 tl.lval = p->p_stats->p_start.tv_sec; 657 *cp++ = tl.cval[0]; 658 *cp++ = tl.cval[1]; 659 *cp++ = tl.cval[2]; 660 *cp++ = tl.cval[3]; 661 tl.lval = p->p_stats->p_start.tv_usec; 662 *cp++ = tl.cval[0]; 663 *cp++ = tl.cval[1]; 664 *cp++ = tl.cval[2]; 665 *cp = tl.cval[3]; 666 } else if ((flags & F_FLOCK) != 0) { 667 bcopy(&id, cp, sizeof(id)); 668 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 669 } else { 670 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 671 bzero(cp, NFSV4CL_LOCKNAMELEN); 672 } 673 } 674 675 /* 676 * Find the parent process for the thread passed in as an argument. 677 * If none exists, return NULL, otherwise return a thread for the parent. 678 * (Can be any of the threads, since it is only used for td->td_proc.) 679 */ 680 NFSPROC_T * 681 nfscl_getparent(struct thread *td) 682 { 683 struct proc *p; 684 struct thread *ptd; 685 686 if (td == NULL) 687 return (NULL); 688 p = td->td_proc; 689 if (p->p_pid == 0) 690 return (NULL); 691 p = p->p_pptr; 692 if (p == NULL) 693 return (NULL); 694 ptd = TAILQ_FIRST(&p->p_threads); 695 return (ptd); 696 } 697 698 /* 699 * Start up the renew kernel thread. 700 */ 701 static void 702 start_nfscl(void *arg) 703 { 704 struct nfsclclient *clp; 705 struct thread *td; 706 707 clp = (struct nfsclclient *)arg; 708 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 709 nfscl_renewthread(clp, td); 710 kproc_exit(0); 711 } 712 713 void 714 nfscl_start_renewthread(struct nfsclclient *clp) 715 { 716 717 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 718 "nfscl"); 719 } 720 721 /* 722 * Handle wcc_data. 723 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 724 * as the first Op after PutFH. 725 * (For NFSv4, the postop attributes are after the Op, so they can't be 726 * parsed here. A separate call to nfscl_postop_attr() is required.) 727 */ 728 int 729 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 730 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 731 { 732 u_int32_t *tl; 733 struct nfsnode *np = VTONFS(vp); 734 struct nfsvattr nfsva; 735 int error = 0; 736 737 if (wccflagp != NULL) 738 *wccflagp = 0; 739 if (nd->nd_flag & ND_NFSV3) { 740 *flagp = 0; 741 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 742 if (*tl == newnfs_true) { 743 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 744 if (wccflagp != NULL) { 745 NFSLOCKNODE(np); 746 *wccflagp = (np->n_mtime.tv_sec == 747 fxdr_unsigned(u_int32_t, *(tl + 2)) && 748 np->n_mtime.tv_nsec == 749 fxdr_unsigned(u_int32_t, *(tl + 3))); 750 NFSUNLOCKNODE(np); 751 } 752 } 753 error = nfscl_postop_attr(nd, nap, flagp, stuff); 754 if (wccflagp != NULL && *flagp == 0) 755 *wccflagp = 0; 756 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 757 == (ND_NFSV4 | ND_V4WCCATTR)) { 758 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 759 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 760 NULL, NULL, NULL, NULL, NULL); 761 if (error) 762 return (error); 763 /* 764 * Get rid of Op# and status for next op. 765 */ 766 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 767 if (*++tl) 768 nd->nd_flag |= ND_NOMOREDATA; 769 if (wccflagp != NULL && 770 nfsva.na_vattr.va_mtime.tv_sec != 0) { 771 NFSLOCKNODE(np); 772 *wccflagp = (np->n_mtime.tv_sec == 773 nfsva.na_vattr.va_mtime.tv_sec && 774 np->n_mtime.tv_nsec == 775 nfsva.na_vattr.va_mtime.tv_sec); 776 NFSUNLOCKNODE(np); 777 } 778 } 779 nfsmout: 780 return (error); 781 } 782 783 /* 784 * Get postop attributes. 785 */ 786 int 787 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 788 void *stuff) 789 { 790 u_int32_t *tl; 791 int error = 0; 792 793 *retp = 0; 794 if (nd->nd_flag & ND_NOMOREDATA) 795 return (error); 796 if (nd->nd_flag & ND_NFSV3) { 797 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 798 *retp = fxdr_unsigned(int, *tl); 799 } else if (nd->nd_flag & ND_NFSV4) { 800 /* 801 * For NFSv4, the postop attr are at the end, so no point 802 * in looking if nd_repstat != 0. 803 */ 804 if (!nd->nd_repstat) { 805 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 806 if (*(tl + 1)) 807 /* should never happen since nd_repstat != 0 */ 808 nd->nd_flag |= ND_NOMOREDATA; 809 else 810 *retp = 1; 811 } 812 } else if (!nd->nd_repstat) { 813 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 814 *retp = 1; 815 } 816 if (*retp) { 817 error = nfsm_loadattr(nd, nap); 818 if (error) 819 *retp = 0; 820 } 821 nfsmout: 822 return (error); 823 } 824 825 /* 826 * nfscl_request() - mostly a wrapper for newnfs_request(). 827 */ 828 int 829 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 830 struct ucred *cred, void *stuff) 831 { 832 int ret, vers; 833 struct nfsmount *nmp; 834 835 nmp = VFSTONFS(vp->v_mount); 836 if (nd->nd_flag & ND_NFSV4) 837 vers = NFS_VER4; 838 else if (nd->nd_flag & ND_NFSV3) 839 vers = NFS_VER3; 840 else 841 vers = NFS_VER2; 842 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 843 NFS_PROG, vers, NULL, 1, NULL, NULL); 844 return (ret); 845 } 846 847 /* 848 * fill in this bsden's variant of statfs using nfsstatfs. 849 */ 850 void 851 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 852 { 853 struct statfs *sbp = (struct statfs *)statfs; 854 855 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 856 sbp->f_bsize = NFS_FABLKSIZE; 857 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 858 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 859 /* 860 * Although sf_abytes is uint64_t and f_bavail is int64_t, 861 * the value after dividing by NFS_FABLKSIZE is small 862 * enough that it will fit in 63bits, so it is ok to 863 * assign it to f_bavail without fear that it will become 864 * negative. 865 */ 866 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 867 sbp->f_files = sfp->sf_tfiles; 868 /* Since f_ffree is int64_t, clip it to 63bits. */ 869 if (sfp->sf_ffiles > INT64_MAX) 870 sbp->f_ffree = INT64_MAX; 871 else 872 sbp->f_ffree = sfp->sf_ffiles; 873 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 874 /* 875 * The type casts to (int32_t) ensure that this code is 876 * compatible with the old NFS client, in that it will 877 * propagate bit31 to the high order bits. This may or may 878 * not be correct for NFSv2, but since it is a legacy 879 * environment, I'd rather retain backwards compatibility. 880 */ 881 sbp->f_bsize = (int32_t)sfp->sf_bsize; 882 sbp->f_blocks = (int32_t)sfp->sf_blocks; 883 sbp->f_bfree = (int32_t)sfp->sf_bfree; 884 sbp->f_bavail = (int32_t)sfp->sf_bavail; 885 sbp->f_files = 0; 886 sbp->f_ffree = 0; 887 } 888 } 889 890 /* 891 * Use the fsinfo stuff to update the mount point. 892 */ 893 void 894 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 895 { 896 897 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 898 fsp->fs_wtpref >= NFS_FABLKSIZE) 899 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 900 ~(NFS_FABLKSIZE - 1); 901 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 902 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 903 if (nmp->nm_wsize == 0) 904 nmp->nm_wsize = fsp->fs_wtmax; 905 } 906 if (nmp->nm_wsize < NFS_FABLKSIZE) 907 nmp->nm_wsize = NFS_FABLKSIZE; 908 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 909 fsp->fs_rtpref >= NFS_FABLKSIZE) 910 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 911 ~(NFS_FABLKSIZE - 1); 912 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 913 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 914 if (nmp->nm_rsize == 0) 915 nmp->nm_rsize = fsp->fs_rtmax; 916 } 917 if (nmp->nm_rsize < NFS_FABLKSIZE) 918 nmp->nm_rsize = NFS_FABLKSIZE; 919 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 920 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 921 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 922 ~(NFS_DIRBLKSIZ - 1); 923 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 924 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 925 if (nmp->nm_readdirsize == 0) 926 nmp->nm_readdirsize = fsp->fs_rtmax; 927 } 928 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 929 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 930 if (fsp->fs_maxfilesize > 0 && 931 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 932 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 933 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 934 nmp->nm_state |= NFSSTA_GOTFSINFO; 935 } 936 937 /* 938 * Lookups source address which should be used to communicate with 939 * @nmp and stores it inside @pdst. 940 * 941 * Returns 0 on success. 942 */ 943 u_int8_t * 944 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 945 { 946 #if defined(INET6) || defined(INET) 947 int error, fibnum; 948 949 fibnum = curthread->td_proc->p_fibnum; 950 #endif 951 #ifdef INET 952 if (nmp->nm_nam->sa_family == AF_INET) { 953 struct sockaddr_in *sin; 954 struct nhop4_extended nh_ext; 955 956 sin = (struct sockaddr_in *)nmp->nm_nam; 957 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 958 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 959 &nh_ext); 960 CURVNET_RESTORE(); 961 if (error != 0) 962 return (NULL); 963 964 if (IN_LOOPBACK(ntohl(nh_ext.nh_src.s_addr))) { 965 /* Ignore loopback addresses */ 966 return (NULL); 967 } 968 969 *isinet6p = 0; 970 *((struct in_addr *)paddr) = nh_ext.nh_src; 971 972 return (u_int8_t *)paddr; 973 } 974 #endif 975 #ifdef INET6 976 if (nmp->nm_nam->sa_family == AF_INET6) { 977 struct sockaddr_in6 *sin6; 978 979 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 980 981 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 982 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 983 sin6->sin6_scope_id, NULL, paddr, NULL); 984 CURVNET_RESTORE(); 985 if (error != 0) 986 return (NULL); 987 988 if (IN6_IS_ADDR_LOOPBACK(paddr)) 989 return (NULL); 990 991 /* Scope is embedded in */ 992 *isinet6p = 1; 993 994 return (u_int8_t *)paddr; 995 } 996 #endif 997 return (NULL); 998 } 999 1000 /* 1001 * Copy NFS uid, gids from the cred structure. 1002 */ 1003 void 1004 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1005 { 1006 int i; 1007 1008 KASSERT(cr->cr_ngroups >= 0, 1009 ("newnfs_copyincred: negative cr_ngroups")); 1010 nfscr->nfsc_uid = cr->cr_uid; 1011 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1012 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1013 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1014 } 1015 1016 1017 /* 1018 * Do any client specific initialization. 1019 */ 1020 void 1021 nfscl_init(void) 1022 { 1023 static int inited = 0; 1024 1025 if (inited) 1026 return; 1027 inited = 1; 1028 nfscl_inited = 1; 1029 ncl_pbuf_zone = pbuf_zsecond_create("nfspbuf", nswbuf / 2); 1030 } 1031 1032 /* 1033 * Check each of the attributes to be set, to ensure they aren't already 1034 * the correct value. Disable setting ones already correct. 1035 */ 1036 int 1037 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1038 { 1039 1040 if (vap->va_mode != (mode_t)VNOVAL) { 1041 if (vap->va_mode == nvap->na_mode) 1042 vap->va_mode = (mode_t)VNOVAL; 1043 } 1044 if (vap->va_uid != (uid_t)VNOVAL) { 1045 if (vap->va_uid == nvap->na_uid) 1046 vap->va_uid = (uid_t)VNOVAL; 1047 } 1048 if (vap->va_gid != (gid_t)VNOVAL) { 1049 if (vap->va_gid == nvap->na_gid) 1050 vap->va_gid = (gid_t)VNOVAL; 1051 } 1052 if (vap->va_size != VNOVAL) { 1053 if (vap->va_size == nvap->na_size) 1054 vap->va_size = VNOVAL; 1055 } 1056 1057 /* 1058 * We are normally called with only a partially initialized 1059 * VAP. Since the NFSv3 spec says that server may use the 1060 * file attributes to store the verifier, the spec requires 1061 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1062 * in atime, but we can't really assume that all servers will 1063 * so we ensure that our SETATTR sets both atime and mtime. 1064 * Set the VA_UTIMES_NULL flag for this case, so that 1065 * the server's time will be used. This is needed to 1066 * work around a bug in some Solaris servers, where 1067 * setting the time TOCLIENT causes the Setattr RPC 1068 * to return NFS_OK, but not set va_mode. 1069 */ 1070 if (vap->va_mtime.tv_sec == VNOVAL) { 1071 vfs_timestamp(&vap->va_mtime); 1072 vap->va_vaflags |= VA_UTIMES_NULL; 1073 } 1074 if (vap->va_atime.tv_sec == VNOVAL) 1075 vap->va_atime = vap->va_mtime; 1076 return (1); 1077 } 1078 1079 /* 1080 * Map nfsv4 errors to errno.h errors. 1081 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1082 * error should only be returned for the Open, Create and Setattr Ops. 1083 * As such, most calls can just pass in 0 for those arguments. 1084 */ 1085 APPLESTATIC int 1086 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1087 { 1088 struct proc *p; 1089 1090 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1091 return (error); 1092 if (td != NULL) 1093 p = td->td_proc; 1094 else 1095 p = NULL; 1096 switch (error) { 1097 case NFSERR_BADOWNER: 1098 tprintf(p, LOG_INFO, 1099 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1100 uid, gid); 1101 return (EPERM); 1102 case NFSERR_BADNAME: 1103 case NFSERR_BADCHAR: 1104 printf("nfsv4 char/name not handled by server\n"); 1105 return (ENOENT); 1106 case NFSERR_STALECLIENTID: 1107 case NFSERR_STALESTATEID: 1108 case NFSERR_EXPIRED: 1109 case NFSERR_BADSTATEID: 1110 case NFSERR_BADSESSION: 1111 printf("nfsv4 recover err returned %d\n", error); 1112 return (EIO); 1113 case NFSERR_BADHANDLE: 1114 case NFSERR_SERVERFAULT: 1115 case NFSERR_BADTYPE: 1116 case NFSERR_FHEXPIRED: 1117 case NFSERR_RESOURCE: 1118 case NFSERR_MOVED: 1119 case NFSERR_NOFILEHANDLE: 1120 case NFSERR_MINORVERMISMATCH: 1121 case NFSERR_OLDSTATEID: 1122 case NFSERR_BADSEQID: 1123 case NFSERR_LEASEMOVED: 1124 case NFSERR_RECLAIMBAD: 1125 case NFSERR_BADXDR: 1126 case NFSERR_OPILLEGAL: 1127 printf("nfsv4 client/server protocol prob err=%d\n", 1128 error); 1129 return (EIO); 1130 default: 1131 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1132 return (EIO); 1133 }; 1134 } 1135 1136 /* 1137 * Check to see if the process for this owner exists. Return 1 if it doesn't 1138 * and 0 otherwise. 1139 */ 1140 int 1141 nfscl_procdoesntexist(u_int8_t *own) 1142 { 1143 union { 1144 u_int32_t lval; 1145 u_int8_t cval[4]; 1146 } tl; 1147 struct proc *p; 1148 pid_t pid; 1149 int i, ret = 0; 1150 1151 /* For the single open_owner of all 0 bytes, just return 0. */ 1152 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1153 if (own[i] != 0) 1154 break; 1155 if (i == NFSV4CL_LOCKNAMELEN) 1156 return (0); 1157 1158 tl.cval[0] = *own++; 1159 tl.cval[1] = *own++; 1160 tl.cval[2] = *own++; 1161 tl.cval[3] = *own++; 1162 pid = tl.lval; 1163 p = pfind_any_locked(pid); 1164 if (p == NULL) 1165 return (1); 1166 if (p->p_stats == NULL) { 1167 PROC_UNLOCK(p); 1168 return (0); 1169 } 1170 tl.cval[0] = *own++; 1171 tl.cval[1] = *own++; 1172 tl.cval[2] = *own++; 1173 tl.cval[3] = *own++; 1174 if (tl.lval != p->p_stats->p_start.tv_sec) { 1175 ret = 1; 1176 } else { 1177 tl.cval[0] = *own++; 1178 tl.cval[1] = *own++; 1179 tl.cval[2] = *own++; 1180 tl.cval[3] = *own; 1181 if (tl.lval != p->p_stats->p_start.tv_usec) 1182 ret = 1; 1183 } 1184 PROC_UNLOCK(p); 1185 return (ret); 1186 } 1187 1188 /* 1189 * - nfs pseudo system call for the client 1190 */ 1191 /* 1192 * MPSAFE 1193 */ 1194 static int 1195 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1196 { 1197 struct file *fp; 1198 struct nfscbd_args nfscbdarg; 1199 struct nfsd_nfscbd_args nfscbdarg2; 1200 struct nameidata nd; 1201 struct nfscl_dumpmntopts dumpmntopts; 1202 cap_rights_t rights; 1203 char *buf; 1204 int error; 1205 struct mount *mp; 1206 struct nfsmount *nmp; 1207 1208 if (uap->flag & NFSSVC_CBADDSOCK) { 1209 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1210 if (error) 1211 return (error); 1212 /* 1213 * Since we don't know what rights might be required, 1214 * pretend that we need them all. It is better to be too 1215 * careful than too reckless. 1216 */ 1217 error = fget(td, nfscbdarg.sock, 1218 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1219 if (error) 1220 return (error); 1221 if (fp->f_type != DTYPE_SOCKET) { 1222 fdrop(fp, td); 1223 return (EPERM); 1224 } 1225 error = nfscbd_addsock(fp); 1226 fdrop(fp, td); 1227 if (!error && nfscl_enablecallb == 0) { 1228 nfsv4_cbport = nfscbdarg.port; 1229 nfscl_enablecallb = 1; 1230 } 1231 } else if (uap->flag & NFSSVC_NFSCBD) { 1232 if (uap->argp == NULL) 1233 return (EINVAL); 1234 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1235 sizeof(nfscbdarg2)); 1236 if (error) 1237 return (error); 1238 error = nfscbd_nfsd(td, &nfscbdarg2); 1239 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1240 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1241 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1242 dumpmntopts.ndmnt_blen > 1024)) 1243 error = EINVAL; 1244 if (error == 0) 1245 error = nfsrv_lookupfilename(&nd, 1246 dumpmntopts.ndmnt_fname, td); 1247 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1248 "nfs") != 0) { 1249 vput(nd.ni_vp); 1250 error = EINVAL; 1251 } 1252 if (error == 0) { 1253 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1254 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1255 dumpmntopts.ndmnt_blen); 1256 vput(nd.ni_vp); 1257 error = copyout(buf, dumpmntopts.ndmnt_buf, 1258 dumpmntopts.ndmnt_blen); 1259 free(buf, M_TEMP); 1260 } 1261 } else if (uap->flag & NFSSVC_FORCEDISM) { 1262 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1263 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1264 if (error == 0) { 1265 nmp = NULL; 1266 mtx_lock(&mountlist_mtx); 1267 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1268 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1269 0 && strcmp(mp->mnt_stat.f_fstypename, 1270 "nfs") == 0 && mp->mnt_data != NULL) { 1271 nmp = VFSTONFS(mp); 1272 NFSDDSLOCK(); 1273 if (nfsv4_findmirror(nmp) != NULL) { 1274 NFSDDSUNLOCK(); 1275 error = ENXIO; 1276 nmp = NULL; 1277 break; 1278 } 1279 mtx_lock(&nmp->nm_mtx); 1280 if ((nmp->nm_privflag & 1281 NFSMNTP_FORCEDISM) == 0) { 1282 nmp->nm_privflag |= 1283 (NFSMNTP_FORCEDISM | 1284 NFSMNTP_CANCELRPCS); 1285 mtx_unlock(&nmp->nm_mtx); 1286 } else { 1287 mtx_unlock(&nmp->nm_mtx); 1288 nmp = NULL; 1289 } 1290 NFSDDSUNLOCK(); 1291 break; 1292 } 1293 } 1294 mtx_unlock(&mountlist_mtx); 1295 1296 if (nmp != NULL) { 1297 /* 1298 * Call newnfs_nmcancelreqs() to cause 1299 * any RPCs in progress on the mount point to 1300 * fail. 1301 * This will cause any process waiting for an 1302 * RPC to complete while holding a vnode lock 1303 * on the mounted-on vnode (such as "df" or 1304 * a non-forced "umount") to fail. 1305 * This will unlock the mounted-on vnode so 1306 * a forced dismount can succeed. 1307 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1308 * so that nfs_unmount() can complete. 1309 */ 1310 newnfs_nmcancelreqs(nmp); 1311 mtx_lock(&nmp->nm_mtx); 1312 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1313 wakeup(nmp); 1314 mtx_unlock(&nmp->nm_mtx); 1315 } else if (error == 0) 1316 error = EINVAL; 1317 } 1318 free(buf, M_TEMP); 1319 } else { 1320 error = EINVAL; 1321 } 1322 return (error); 1323 } 1324 1325 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1326 1327 /* 1328 * Called once to initialize data structures... 1329 */ 1330 static int 1331 nfscl_modevent(module_t mod, int type, void *data) 1332 { 1333 int error = 0; 1334 static int loaded = 0; 1335 1336 switch (type) { 1337 case MOD_LOAD: 1338 if (loaded) 1339 return (0); 1340 newnfs_portinit(); 1341 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1342 nfscl_init(); 1343 NFSD_LOCK(); 1344 nfsrvd_cbinit(0); 1345 NFSD_UNLOCK(); 1346 ncl_call_invalcaches = ncl_invalcaches; 1347 nfsd_call_nfscl = nfssvc_nfscl; 1348 loaded = 1; 1349 break; 1350 1351 case MOD_UNLOAD: 1352 if (nfs_numnfscbd != 0) { 1353 error = EBUSY; 1354 break; 1355 } 1356 1357 /* 1358 * XXX: Unloading of nfscl module is unsupported. 1359 */ 1360 #if 0 1361 ncl_call_invalcaches = NULL; 1362 nfsd_call_nfscl = NULL; 1363 uma_zdestroy(ncl_pbuf_zone); 1364 /* and get rid of the mutexes */ 1365 mtx_destroy(&ncl_iod_mutex); 1366 loaded = 0; 1367 break; 1368 #else 1369 /* FALLTHROUGH */ 1370 #endif 1371 default: 1372 error = EOPNOTSUPP; 1373 break; 1374 } 1375 return error; 1376 } 1377 static moduledata_t nfscl_mod = { 1378 "nfscl", 1379 nfscl_modevent, 1380 NULL, 1381 }; 1382 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1383 1384 /* So that loader and kldload(2) can find us, wherever we are.. */ 1385 MODULE_VERSION(nfscl, 1); 1386 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1387 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1388 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1389 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1390 1391