1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 40 #include <sys/capsicum.h> 41 42 /* 43 * generally, I don't like #includes inside .h files, but it seems to 44 * be the easiest way to handle the port. 45 */ 46 #include <sys/fail.h> 47 #include <sys/hash.h> 48 #include <sys/sysctl.h> 49 #include <fs/nfs/nfsport.h> 50 #include <netinet/in_fib.h> 51 #include <netinet/if_ether.h> 52 #include <netinet6/ip6_var.h> 53 #include <net/if_types.h> 54 55 #include <fs/nfsclient/nfs_kdtrace.h> 56 57 #ifdef KDTRACE_HOOKS 58 dtrace_nfsclient_attrcache_flush_probe_func_t 59 dtrace_nfscl_attrcache_flush_done_probe; 60 uint32_t nfscl_attrcache_flush_done_id; 61 62 dtrace_nfsclient_attrcache_get_hit_probe_func_t 63 dtrace_nfscl_attrcache_get_hit_probe; 64 uint32_t nfscl_attrcache_get_hit_id; 65 66 dtrace_nfsclient_attrcache_get_miss_probe_func_t 67 dtrace_nfscl_attrcache_get_miss_probe; 68 uint32_t nfscl_attrcache_get_miss_id; 69 70 dtrace_nfsclient_attrcache_load_probe_func_t 71 dtrace_nfscl_attrcache_load_done_probe; 72 uint32_t nfscl_attrcache_load_done_id; 73 #endif /* !KDTRACE_HOOKS */ 74 75 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 76 extern struct vop_vector newnfs_vnodeops; 77 extern struct vop_vector newnfs_fifoops; 78 extern uma_zone_t newnfsnode_zone; 79 extern struct buf_ops buf_ops_newnfs; 80 extern int ncl_pbuf_freecnt; 81 extern short nfsv4_cbport; 82 extern int nfscl_enablecallb; 83 extern int nfs_numnfscbd; 84 extern int nfscl_inited; 85 struct mtx ncl_iod_mutex; 86 NFSDLOCKMUTEX; 87 88 extern void (*ncl_call_invalcaches)(struct vnode *); 89 90 SYSCTL_DECL(_vfs_nfs); 91 static int ncl_fileid_maxwarnings = 10; 92 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN, 93 &ncl_fileid_maxwarnings, 0, 94 "Limit fileid corruption warnings; 0 is off; -1 is unlimited"); 95 static volatile int ncl_fileid_nwarnings; 96 97 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *, 98 struct nfsvattr *); 99 100 /* 101 * Comparison function for vfs_hash functions. 102 */ 103 int 104 newnfs_vncmpf(struct vnode *vp, void *arg) 105 { 106 struct nfsfh *nfhp = (struct nfsfh *)arg; 107 struct nfsnode *np = VTONFS(vp); 108 109 if (np->n_fhp->nfh_len != nfhp->nfh_len || 110 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 111 return (1); 112 return (0); 113 } 114 115 /* 116 * Look up a vnode/nfsnode by file handle. 117 * Callers must check for mount points!! 118 * In all cases, a pointer to a 119 * nfsnode structure is returned. 120 * This variant takes a "struct nfsfh *" as second argument and uses 121 * that structure up, either by hanging off the nfsnode or FREEing it. 122 */ 123 int 124 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 125 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 126 void *stuff, int lkflags) 127 { 128 struct nfsnode *np, *dnp; 129 struct vnode *vp, *nvp; 130 struct nfsv4node *newd, *oldd; 131 int error; 132 u_int hash; 133 struct nfsmount *nmp; 134 135 nmp = VFSTONFS(mntp); 136 dnp = VTONFS(dvp); 137 *npp = NULL; 138 139 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 140 141 error = vfs_hash_get(mntp, hash, lkflags, 142 td, &nvp, newnfs_vncmpf, nfhp); 143 if (error == 0 && nvp != NULL) { 144 /* 145 * I believe there is a slight chance that vgonel() could 146 * get called on this vnode between when NFSVOPLOCK() drops 147 * the VI_LOCK() and vget() acquires it again, so that it 148 * hasn't yet had v_usecount incremented. If this were to 149 * happen, the VI_DOOMED flag would be set, so check for 150 * that here. Since we now have the v_usecount incremented, 151 * we should be ok until we vrele() it, if the VI_DOOMED 152 * flag isn't set now. 153 */ 154 VI_LOCK(nvp); 155 if ((nvp->v_iflag & VI_DOOMED)) { 156 VI_UNLOCK(nvp); 157 vrele(nvp); 158 error = ENOENT; 159 } else { 160 VI_UNLOCK(nvp); 161 } 162 } 163 if (error) { 164 FREE((caddr_t)nfhp, M_NFSFH); 165 return (error); 166 } 167 if (nvp != NULL) { 168 np = VTONFS(nvp); 169 /* 170 * For NFSv4, check to see if it is the same name and 171 * replace the name, if it is different. 172 */ 173 oldd = newd = NULL; 174 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 175 nvp->v_type == VREG && 176 (np->n_v4->n4_namelen != cnp->cn_namelen || 177 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 178 cnp->cn_namelen) || 179 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 180 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 181 dnp->n_fhp->nfh_len))) { 182 MALLOC(newd, struct nfsv4node *, 183 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 184 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 185 NFSLOCKNODE(np); 186 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 187 && (np->n_v4->n4_namelen != cnp->cn_namelen || 188 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 189 cnp->cn_namelen) || 190 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 191 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 192 dnp->n_fhp->nfh_len))) { 193 oldd = np->n_v4; 194 np->n_v4 = newd; 195 newd = NULL; 196 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 197 np->n_v4->n4_namelen = cnp->cn_namelen; 198 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 199 dnp->n_fhp->nfh_len); 200 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 201 cnp->cn_namelen); 202 } 203 NFSUNLOCKNODE(np); 204 } 205 if (newd != NULL) 206 FREE((caddr_t)newd, M_NFSV4NODE); 207 if (oldd != NULL) 208 FREE((caddr_t)oldd, M_NFSV4NODE); 209 *npp = np; 210 FREE((caddr_t)nfhp, M_NFSFH); 211 return (0); 212 } 213 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 214 215 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 216 if (error) { 217 uma_zfree(newnfsnode_zone, np); 218 FREE((caddr_t)nfhp, M_NFSFH); 219 return (error); 220 } 221 vp = nvp; 222 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 223 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 224 vp->v_data = np; 225 np->n_vnode = vp; 226 /* 227 * Initialize the mutex even if the vnode is going to be a loser. 228 * This simplifies the logic in reclaim, which can then unconditionally 229 * destroy the mutex (in the case of the loser, or if hash_insert 230 * happened to return an error no special casing is needed). 231 */ 232 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 233 lockinit(&np->n_excl, PVFS, "nfsupg", VLKTIMEOUT, LK_NOSHARE | 234 LK_CANRECURSE); 235 236 /* 237 * Are we getting the root? If so, make sure the vnode flags 238 * are correct 239 */ 240 if ((nfhp->nfh_len == nmp->nm_fhsize) && 241 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 242 if (vp->v_type == VNON) 243 vp->v_type = VDIR; 244 vp->v_vflag |= VV_ROOT; 245 } 246 247 np->n_fhp = nfhp; 248 /* 249 * For NFSv4, we have to attach the directory file handle and 250 * file name, so that Open Ops can be done later. 251 */ 252 if (nmp->nm_flag & NFSMNT_NFSV4) { 253 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 254 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 255 M_WAITOK); 256 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 257 np->n_v4->n4_namelen = cnp->cn_namelen; 258 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 259 dnp->n_fhp->nfh_len); 260 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 261 cnp->cn_namelen); 262 } else { 263 np->n_v4 = NULL; 264 } 265 266 /* 267 * NFS supports recursive and shared locking. 268 */ 269 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 270 VN_LOCK_AREC(vp); 271 VN_LOCK_ASHARE(vp); 272 error = insmntque(vp, mntp); 273 if (error != 0) { 274 *npp = NULL; 275 mtx_destroy(&np->n_mtx); 276 lockdestroy(&np->n_excl); 277 FREE((caddr_t)nfhp, M_NFSFH); 278 if (np->n_v4 != NULL) 279 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 280 uma_zfree(newnfsnode_zone, np); 281 return (error); 282 } 283 error = vfs_hash_insert(vp, hash, lkflags, 284 td, &nvp, newnfs_vncmpf, nfhp); 285 if (error) 286 return (error); 287 if (nvp != NULL) { 288 *npp = VTONFS(nvp); 289 /* vfs_hash_insert() vput()'s the losing vnode */ 290 return (0); 291 } 292 *npp = np; 293 294 return (0); 295 } 296 297 /* 298 * Another variant of nfs_nget(). This one is only used by reopen. It 299 * takes almost the same args as nfs_nget(), but only succeeds if an entry 300 * exists in the cache. (Since files should already be "open" with a 301 * vnode ref cnt on the node when reopen calls this, it should always 302 * succeed.) 303 * Also, don't get a vnode lock, since it may already be locked by some 304 * other process that is handling it. This is ok, since all other threads 305 * on the client are blocked by the nfsc_lock being exclusively held by the 306 * caller of this function. 307 */ 308 int 309 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 310 struct thread *td, struct nfsnode **npp) 311 { 312 struct vnode *nvp; 313 u_int hash; 314 struct nfsfh *nfhp; 315 int error; 316 317 *npp = NULL; 318 /* For forced dismounts, just return error. */ 319 if (NFSCL_FORCEDISM(mntp)) 320 return (EINTR); 321 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 322 M_NFSFH, M_WAITOK); 323 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 324 nfhp->nfh_len = fhsize; 325 326 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 327 328 /* 329 * First, try to get the vnode locked, but don't block for the lock. 330 */ 331 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 332 newnfs_vncmpf, nfhp); 333 if (error == 0 && nvp != NULL) { 334 NFSVOPUNLOCK(nvp, 0); 335 } else if (error == EBUSY) { 336 /* 337 * It is safe so long as a vflush() with 338 * FORCECLOSE has not been done. Since the Renew thread is 339 * stopped and the MNTK_UNMOUNTF flag is set before doing 340 * a vflush() with FORCECLOSE, we should be ok here. 341 */ 342 if (NFSCL_FORCEDISM(mntp)) 343 error = EINTR; 344 else { 345 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 346 if (nvp == NULL) { 347 error = ENOENT; 348 } else if ((nvp->v_iflag & VI_DOOMED) != 0) { 349 error = ENOENT; 350 vrele(nvp); 351 } else { 352 error = 0; 353 } 354 } 355 } 356 FREE(nfhp, M_NFSFH); 357 if (error) 358 return (error); 359 if (nvp != NULL) { 360 *npp = VTONFS(nvp); 361 return (0); 362 } 363 return (EINVAL); 364 } 365 366 static void 367 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 368 struct nfsvattr *newnap) 369 { 370 int off; 371 372 if (ncl_fileid_maxwarnings >= 0 && 373 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 374 return; 375 off = 0; 376 if (ncl_fileid_maxwarnings >= 0) { 377 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 378 off = 1; 379 } 380 381 printf("newnfs: server '%s' error: fileid changed. " 382 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 383 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 384 nmp->nm_com.nmcom_hostname, 385 (uintmax_t)nmp->nm_fsid[0], 386 (uintmax_t)nmp->nm_fsid[1], 387 (uintmax_t)oldnap->na_fileid, 388 (uintmax_t)newnap->na_fileid); 389 390 if (off) 391 printf("newnfs: Logged %d times about fileid corruption; " 392 "going quiet to avoid spamming logs excessively. (Limit " 393 "is: %d).\n", ncl_fileid_nwarnings, 394 ncl_fileid_maxwarnings); 395 } 396 397 /* 398 * Load the attribute cache (that lives in the nfsnode entry) with 399 * the attributes of the second argument and 400 * Iff vaper not NULL 401 * copy the attributes to *vaper 402 * Similar to nfs_loadattrcache(), except the attributes are passed in 403 * instead of being parsed out of the mbuf list. 404 */ 405 int 406 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 407 void *stuff, int writeattr, int dontshrink) 408 { 409 struct vnode *vp = *vpp; 410 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 411 struct nfsnode *np; 412 struct nfsmount *nmp; 413 struct timespec mtime_save; 414 u_quad_t nsize; 415 int setnsize, error, force_fid_err; 416 417 error = 0; 418 setnsize = 0; 419 nsize = 0; 420 421 /* 422 * If v_type == VNON it is a new node, so fill in the v_type, 423 * n_mtime fields. Check to see if it represents a special 424 * device, and if so, check for a possible alias. Once the 425 * correct vnode has been obtained, fill in the rest of the 426 * information. 427 */ 428 np = VTONFS(vp); 429 NFSLOCKNODE(np); 430 if (vp->v_type != nvap->va_type) { 431 vp->v_type = nvap->va_type; 432 if (vp->v_type == VFIFO) 433 vp->v_op = &newnfs_fifoops; 434 np->n_mtime = nvap->va_mtime; 435 } 436 nmp = VFSTONFS(vp->v_mount); 437 vap = &np->n_vattr.na_vattr; 438 mtime_save = vap->va_mtime; 439 if (writeattr) { 440 np->n_vattr.na_filerev = nap->na_filerev; 441 np->n_vattr.na_size = nap->na_size; 442 np->n_vattr.na_mtime = nap->na_mtime; 443 np->n_vattr.na_ctime = nap->na_ctime; 444 np->n_vattr.na_fsid = nap->na_fsid; 445 np->n_vattr.na_mode = nap->na_mode; 446 } else { 447 force_fid_err = 0; 448 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 449 force_fid_err); 450 /* 451 * BROKEN NFS SERVER OR MIDDLEWARE 452 * 453 * Certain NFS servers (certain old proprietary filers ca. 454 * 2006) or broken middleboxes (e.g. WAN accelerator products) 455 * will respond to GETATTR requests with results for a 456 * different fileid. 457 * 458 * The WAN accelerator we've observed not only serves stale 459 * cache results for a given file, it also occasionally serves 460 * results for wholly different files. This causes surprising 461 * problems; for example the cached size attribute of a file 462 * may truncate down and then back up, resulting in zero 463 * regions in file contents read by applications. We observed 464 * this reliably with Clang and .c files during parallel build. 465 * A pcap revealed packet fragmentation and GETATTR RPC 466 * responses with wholly wrong fileids. 467 */ 468 if ((np->n_vattr.na_fileid != 0 && 469 np->n_vattr.na_fileid != nap->na_fileid) || 470 force_fid_err) { 471 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 472 error = EIDRM; 473 goto out; 474 } 475 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 476 sizeof (struct nfsvattr)); 477 } 478 479 /* 480 * For NFSv4, if the node's fsid is not equal to the mount point's 481 * fsid, return the low order 32bits of the node's fsid. This 482 * allows getcwd(3) to work. There is a chance that the fsid might 483 * be the same as a local fs, but since this is in an NFS mount 484 * point, I don't think that will cause any problems? 485 */ 486 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 487 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 488 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 489 /* 490 * va_fsid needs to be set to some value derived from 491 * np->n_vattr.na_filesid that is not equal 492 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 493 * from the value used for the top level server volume 494 * in the mounted subtree. 495 */ 496 vn_fsid(vp, vap); 497 if ((uint32_t)vap->va_fsid == np->n_vattr.na_filesid[0]) 498 vap->va_fsid = hash32_buf( 499 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 500 } else 501 vn_fsid(vp, vap); 502 np->n_attrstamp = time_second; 503 if (vap->va_size != np->n_size) { 504 if (vap->va_type == VREG) { 505 if (dontshrink && vap->va_size < np->n_size) { 506 /* 507 * We've been told not to shrink the file; 508 * zero np->n_attrstamp to indicate that 509 * the attributes are stale. 510 */ 511 vap->va_size = np->n_size; 512 np->n_attrstamp = 0; 513 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 514 vnode_pager_setsize(vp, np->n_size); 515 } else if (np->n_flag & NMODIFIED) { 516 /* 517 * We've modified the file: Use the larger 518 * of our size, and the server's size. 519 */ 520 if (vap->va_size < np->n_size) { 521 vap->va_size = np->n_size; 522 } else { 523 np->n_size = vap->va_size; 524 np->n_flag |= NSIZECHANGED; 525 } 526 vnode_pager_setsize(vp, np->n_size); 527 } else if (vap->va_size < np->n_size) { 528 /* 529 * When shrinking the size, the call to 530 * vnode_pager_setsize() cannot be done 531 * with the mutex held, so delay it until 532 * after the mtx_unlock call. 533 */ 534 nsize = np->n_size = vap->va_size; 535 np->n_flag |= NSIZECHANGED; 536 setnsize = 1; 537 } else { 538 np->n_size = vap->va_size; 539 np->n_flag |= NSIZECHANGED; 540 vnode_pager_setsize(vp, np->n_size); 541 } 542 } else { 543 np->n_size = vap->va_size; 544 } 545 } 546 /* 547 * The following checks are added to prevent a race between (say) 548 * a READDIR+ and a WRITE. 549 * READDIR+, WRITE requests sent out. 550 * READDIR+ resp, WRITE resp received on client. 551 * However, the WRITE resp was handled before the READDIR+ resp 552 * causing the post op attrs from the write to be loaded first 553 * and the attrs from the READDIR+ to be loaded later. If this 554 * happens, we have stale attrs loaded into the attrcache. 555 * We detect this by for the mtime moving back. We invalidate the 556 * attrcache when this happens. 557 */ 558 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 559 /* Size changed or mtime went backwards */ 560 np->n_attrstamp = 0; 561 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 562 } 563 if (vaper != NULL) { 564 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 565 if (np->n_flag & NCHG) { 566 if (np->n_flag & NACC) 567 vaper->va_atime = np->n_atim; 568 if (np->n_flag & NUPD) 569 vaper->va_mtime = np->n_mtim; 570 } 571 } 572 573 out: 574 #ifdef KDTRACE_HOOKS 575 if (np->n_attrstamp != 0) 576 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 577 #endif 578 NFSUNLOCKNODE(np); 579 if (setnsize) 580 vnode_pager_setsize(vp, nsize); 581 return (error); 582 } 583 584 /* 585 * Fill in the client id name. For these bytes: 586 * 1 - they must be unique 587 * 2 - they should be persistent across client reboots 588 * 1 is more critical than 2 589 * Use the mount point's unique id plus either the uuid or, if that 590 * isn't set, random junk. 591 */ 592 void 593 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 594 { 595 int uuidlen; 596 597 /* 598 * First, put in the 64bit mount point identifier. 599 */ 600 if (idlen >= sizeof (u_int64_t)) { 601 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 602 cp += sizeof (u_int64_t); 603 idlen -= sizeof (u_int64_t); 604 } 605 606 /* 607 * If uuid is non-zero length, use it. 608 */ 609 uuidlen = strlen(uuid); 610 if (uuidlen > 0 && idlen >= uuidlen) { 611 NFSBCOPY(uuid, cp, uuidlen); 612 cp += uuidlen; 613 idlen -= uuidlen; 614 } 615 616 /* 617 * This only normally happens if the uuid isn't set. 618 */ 619 while (idlen > 0) { 620 *cp++ = (u_int8_t)(arc4random() % 256); 621 idlen--; 622 } 623 } 624 625 /* 626 * Fill in a lock owner name. For now, pid + the process's creation time. 627 */ 628 void 629 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 630 { 631 union { 632 u_int32_t lval; 633 u_int8_t cval[4]; 634 } tl; 635 struct proc *p; 636 637 if (id == NULL) { 638 /* Return the single open_owner of all 0 bytes. */ 639 bzero(cp, NFSV4CL_LOCKNAMELEN); 640 return; 641 } 642 if ((flags & F_POSIX) != 0) { 643 p = (struct proc *)id; 644 tl.lval = p->p_pid; 645 *cp++ = tl.cval[0]; 646 *cp++ = tl.cval[1]; 647 *cp++ = tl.cval[2]; 648 *cp++ = tl.cval[3]; 649 tl.lval = p->p_stats->p_start.tv_sec; 650 *cp++ = tl.cval[0]; 651 *cp++ = tl.cval[1]; 652 *cp++ = tl.cval[2]; 653 *cp++ = tl.cval[3]; 654 tl.lval = p->p_stats->p_start.tv_usec; 655 *cp++ = tl.cval[0]; 656 *cp++ = tl.cval[1]; 657 *cp++ = tl.cval[2]; 658 *cp = tl.cval[3]; 659 } else if ((flags & F_FLOCK) != 0) { 660 bcopy(&id, cp, sizeof(id)); 661 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 662 } else { 663 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 664 bzero(cp, NFSV4CL_LOCKNAMELEN); 665 } 666 } 667 668 /* 669 * Find the parent process for the thread passed in as an argument. 670 * If none exists, return NULL, otherwise return a thread for the parent. 671 * (Can be any of the threads, since it is only used for td->td_proc.) 672 */ 673 NFSPROC_T * 674 nfscl_getparent(struct thread *td) 675 { 676 struct proc *p; 677 struct thread *ptd; 678 679 if (td == NULL) 680 return (NULL); 681 p = td->td_proc; 682 if (p->p_pid == 0) 683 return (NULL); 684 p = p->p_pptr; 685 if (p == NULL) 686 return (NULL); 687 ptd = TAILQ_FIRST(&p->p_threads); 688 return (ptd); 689 } 690 691 /* 692 * Start up the renew kernel thread. 693 */ 694 static void 695 start_nfscl(void *arg) 696 { 697 struct nfsclclient *clp; 698 struct thread *td; 699 700 clp = (struct nfsclclient *)arg; 701 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 702 nfscl_renewthread(clp, td); 703 kproc_exit(0); 704 } 705 706 void 707 nfscl_start_renewthread(struct nfsclclient *clp) 708 { 709 710 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 711 "nfscl"); 712 } 713 714 /* 715 * Handle wcc_data. 716 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 717 * as the first Op after PutFH. 718 * (For NFSv4, the postop attributes are after the Op, so they can't be 719 * parsed here. A separate call to nfscl_postop_attr() is required.) 720 */ 721 int 722 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 723 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 724 { 725 u_int32_t *tl; 726 struct nfsnode *np = VTONFS(vp); 727 struct nfsvattr nfsva; 728 int error = 0; 729 730 if (wccflagp != NULL) 731 *wccflagp = 0; 732 if (nd->nd_flag & ND_NFSV3) { 733 *flagp = 0; 734 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 735 if (*tl == newnfs_true) { 736 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 737 if (wccflagp != NULL) { 738 mtx_lock(&np->n_mtx); 739 *wccflagp = (np->n_mtime.tv_sec == 740 fxdr_unsigned(u_int32_t, *(tl + 2)) && 741 np->n_mtime.tv_nsec == 742 fxdr_unsigned(u_int32_t, *(tl + 3))); 743 mtx_unlock(&np->n_mtx); 744 } 745 } 746 error = nfscl_postop_attr(nd, nap, flagp, stuff); 747 if (wccflagp != NULL && *flagp == 0) 748 *wccflagp = 0; 749 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 750 == (ND_NFSV4 | ND_V4WCCATTR)) { 751 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 752 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 753 NULL, NULL, NULL, NULL, NULL); 754 if (error) 755 return (error); 756 /* 757 * Get rid of Op# and status for next op. 758 */ 759 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 760 if (*++tl) 761 nd->nd_flag |= ND_NOMOREDATA; 762 if (wccflagp != NULL && 763 nfsva.na_vattr.va_mtime.tv_sec != 0) { 764 mtx_lock(&np->n_mtx); 765 *wccflagp = (np->n_mtime.tv_sec == 766 nfsva.na_vattr.va_mtime.tv_sec && 767 np->n_mtime.tv_nsec == 768 nfsva.na_vattr.va_mtime.tv_sec); 769 mtx_unlock(&np->n_mtx); 770 } 771 } 772 nfsmout: 773 return (error); 774 } 775 776 /* 777 * Get postop attributes. 778 */ 779 int 780 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 781 void *stuff) 782 { 783 u_int32_t *tl; 784 int error = 0; 785 786 *retp = 0; 787 if (nd->nd_flag & ND_NOMOREDATA) 788 return (error); 789 if (nd->nd_flag & ND_NFSV3) { 790 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 791 *retp = fxdr_unsigned(int, *tl); 792 } else if (nd->nd_flag & ND_NFSV4) { 793 /* 794 * For NFSv4, the postop attr are at the end, so no point 795 * in looking if nd_repstat != 0. 796 */ 797 if (!nd->nd_repstat) { 798 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 799 if (*(tl + 1)) 800 /* should never happen since nd_repstat != 0 */ 801 nd->nd_flag |= ND_NOMOREDATA; 802 else 803 *retp = 1; 804 } 805 } else if (!nd->nd_repstat) { 806 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 807 *retp = 1; 808 } 809 if (*retp) { 810 error = nfsm_loadattr(nd, nap); 811 if (error) 812 *retp = 0; 813 } 814 nfsmout: 815 return (error); 816 } 817 818 /* 819 * Fill in the setable attributes. The full argument indicates whether 820 * to fill in them all or just mode and time. 821 */ 822 void 823 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 824 struct vnode *vp, int flags, u_int32_t rdev) 825 { 826 u_int32_t *tl; 827 struct nfsv2_sattr *sp; 828 nfsattrbit_t attrbits; 829 830 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 831 case ND_NFSV2: 832 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 833 if (vap->va_mode == (mode_t)VNOVAL) 834 sp->sa_mode = newnfs_xdrneg1; 835 else 836 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 837 if (vap->va_uid == (uid_t)VNOVAL) 838 sp->sa_uid = newnfs_xdrneg1; 839 else 840 sp->sa_uid = txdr_unsigned(vap->va_uid); 841 if (vap->va_gid == (gid_t)VNOVAL) 842 sp->sa_gid = newnfs_xdrneg1; 843 else 844 sp->sa_gid = txdr_unsigned(vap->va_gid); 845 if (flags & NFSSATTR_SIZE0) 846 sp->sa_size = 0; 847 else if (flags & NFSSATTR_SIZENEG1) 848 sp->sa_size = newnfs_xdrneg1; 849 else if (flags & NFSSATTR_SIZERDEV) 850 sp->sa_size = txdr_unsigned(rdev); 851 else 852 sp->sa_size = txdr_unsigned(vap->va_size); 853 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 854 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 855 break; 856 case ND_NFSV3: 857 if (vap->va_mode != (mode_t)VNOVAL) { 858 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 859 *tl++ = newnfs_true; 860 *tl = txdr_unsigned(vap->va_mode); 861 } else { 862 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 863 *tl = newnfs_false; 864 } 865 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 866 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 867 *tl++ = newnfs_true; 868 *tl = txdr_unsigned(vap->va_uid); 869 } else { 870 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 871 *tl = newnfs_false; 872 } 873 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 874 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 875 *tl++ = newnfs_true; 876 *tl = txdr_unsigned(vap->va_gid); 877 } else { 878 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 879 *tl = newnfs_false; 880 } 881 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 882 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 883 *tl++ = newnfs_true; 884 txdr_hyper(vap->va_size, tl); 885 } else { 886 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 887 *tl = newnfs_false; 888 } 889 if (vap->va_atime.tv_sec != VNOVAL) { 890 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 891 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 892 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 893 txdr_nfsv3time(&vap->va_atime, tl); 894 } else { 895 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 896 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 897 } 898 } else { 899 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 900 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 901 } 902 if (vap->va_mtime.tv_sec != VNOVAL) { 903 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 904 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 905 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 906 txdr_nfsv3time(&vap->va_mtime, tl); 907 } else { 908 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 909 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 910 } 911 } else { 912 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 913 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 914 } 915 break; 916 case ND_NFSV4: 917 NFSZERO_ATTRBIT(&attrbits); 918 if (vap->va_mode != (mode_t)VNOVAL) 919 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 920 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 921 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 922 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 923 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 924 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 925 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 926 if (vap->va_atime.tv_sec != VNOVAL) 927 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 928 if (vap->va_mtime.tv_sec != VNOVAL) 929 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 930 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 931 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 932 break; 933 } 934 } 935 936 /* 937 * nfscl_request() - mostly a wrapper for newnfs_request(). 938 */ 939 int 940 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 941 struct ucred *cred, void *stuff) 942 { 943 int ret, vers; 944 struct nfsmount *nmp; 945 946 nmp = VFSTONFS(vp->v_mount); 947 if (nd->nd_flag & ND_NFSV4) 948 vers = NFS_VER4; 949 else if (nd->nd_flag & ND_NFSV3) 950 vers = NFS_VER3; 951 else 952 vers = NFS_VER2; 953 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 954 NFS_PROG, vers, NULL, 1, NULL, NULL); 955 return (ret); 956 } 957 958 /* 959 * fill in this bsden's variant of statfs using nfsstatfs. 960 */ 961 void 962 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 963 { 964 struct statfs *sbp = (struct statfs *)statfs; 965 966 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 967 sbp->f_bsize = NFS_FABLKSIZE; 968 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 969 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 970 /* 971 * Although sf_abytes is uint64_t and f_bavail is int64_t, 972 * the value after dividing by NFS_FABLKSIZE is small 973 * enough that it will fit in 63bits, so it is ok to 974 * assign it to f_bavail without fear that it will become 975 * negative. 976 */ 977 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 978 sbp->f_files = sfp->sf_tfiles; 979 /* Since f_ffree is int64_t, clip it to 63bits. */ 980 if (sfp->sf_ffiles > INT64_MAX) 981 sbp->f_ffree = INT64_MAX; 982 else 983 sbp->f_ffree = sfp->sf_ffiles; 984 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 985 /* 986 * The type casts to (int32_t) ensure that this code is 987 * compatible with the old NFS client, in that it will 988 * propagate bit31 to the high order bits. This may or may 989 * not be correct for NFSv2, but since it is a legacy 990 * environment, I'd rather retain backwards compatibility. 991 */ 992 sbp->f_bsize = (int32_t)sfp->sf_bsize; 993 sbp->f_blocks = (int32_t)sfp->sf_blocks; 994 sbp->f_bfree = (int32_t)sfp->sf_bfree; 995 sbp->f_bavail = (int32_t)sfp->sf_bavail; 996 sbp->f_files = 0; 997 sbp->f_ffree = 0; 998 } 999 } 1000 1001 /* 1002 * Use the fsinfo stuff to update the mount point. 1003 */ 1004 void 1005 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 1006 { 1007 1008 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 1009 fsp->fs_wtpref >= NFS_FABLKSIZE) 1010 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 1011 ~(NFS_FABLKSIZE - 1); 1012 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 1013 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 1014 if (nmp->nm_wsize == 0) 1015 nmp->nm_wsize = fsp->fs_wtmax; 1016 } 1017 if (nmp->nm_wsize < NFS_FABLKSIZE) 1018 nmp->nm_wsize = NFS_FABLKSIZE; 1019 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 1020 fsp->fs_rtpref >= NFS_FABLKSIZE) 1021 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 1022 ~(NFS_FABLKSIZE - 1); 1023 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 1024 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 1025 if (nmp->nm_rsize == 0) 1026 nmp->nm_rsize = fsp->fs_rtmax; 1027 } 1028 if (nmp->nm_rsize < NFS_FABLKSIZE) 1029 nmp->nm_rsize = NFS_FABLKSIZE; 1030 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 1031 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 1032 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 1033 ~(NFS_DIRBLKSIZ - 1); 1034 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 1035 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 1036 if (nmp->nm_readdirsize == 0) 1037 nmp->nm_readdirsize = fsp->fs_rtmax; 1038 } 1039 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 1040 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 1041 if (fsp->fs_maxfilesize > 0 && 1042 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 1043 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 1044 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 1045 nmp->nm_state |= NFSSTA_GOTFSINFO; 1046 } 1047 1048 /* 1049 * Lookups source address which should be used to communicate with 1050 * @nmp and stores it inside @pdst. 1051 * 1052 * Returns 0 on success. 1053 */ 1054 u_int8_t * 1055 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 1056 { 1057 #if defined(INET6) || defined(INET) 1058 int error, fibnum; 1059 1060 fibnum = curthread->td_proc->p_fibnum; 1061 #endif 1062 #ifdef INET 1063 if (nmp->nm_nam->sa_family == AF_INET) { 1064 struct sockaddr_in *sin; 1065 struct nhop4_extended nh_ext; 1066 1067 sin = (struct sockaddr_in *)nmp->nm_nam; 1068 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1069 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 1070 &nh_ext); 1071 CURVNET_RESTORE(); 1072 if (error != 0) 1073 return (NULL); 1074 1075 if ((ntohl(nh_ext.nh_src.s_addr) >> IN_CLASSA_NSHIFT) == 1076 IN_LOOPBACKNET) { 1077 /* Ignore loopback addresses */ 1078 return (NULL); 1079 } 1080 1081 *isinet6p = 0; 1082 *((struct in_addr *)paddr) = nh_ext.nh_src; 1083 1084 return (u_int8_t *)paddr; 1085 } 1086 #endif 1087 #ifdef INET6 1088 if (nmp->nm_nam->sa_family == AF_INET6) { 1089 struct sockaddr_in6 *sin6; 1090 1091 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1092 1093 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1094 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1095 sin6->sin6_scope_id, NULL, paddr, NULL); 1096 CURVNET_RESTORE(); 1097 if (error != 0) 1098 return (NULL); 1099 1100 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1101 return (NULL); 1102 1103 /* Scope is embedded in */ 1104 *isinet6p = 1; 1105 1106 return (u_int8_t *)paddr; 1107 } 1108 #endif 1109 return (NULL); 1110 } 1111 1112 /* 1113 * Copy NFS uid, gids from the cred structure. 1114 */ 1115 void 1116 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1117 { 1118 int i; 1119 1120 KASSERT(cr->cr_ngroups >= 0, 1121 ("newnfs_copyincred: negative cr_ngroups")); 1122 nfscr->nfsc_uid = cr->cr_uid; 1123 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1124 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1125 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1126 } 1127 1128 1129 /* 1130 * Do any client specific initialization. 1131 */ 1132 void 1133 nfscl_init(void) 1134 { 1135 static int inited = 0; 1136 1137 if (inited) 1138 return; 1139 inited = 1; 1140 nfscl_inited = 1; 1141 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1142 } 1143 1144 /* 1145 * Check each of the attributes to be set, to ensure they aren't already 1146 * the correct value. Disable setting ones already correct. 1147 */ 1148 int 1149 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1150 { 1151 1152 if (vap->va_mode != (mode_t)VNOVAL) { 1153 if (vap->va_mode == nvap->na_mode) 1154 vap->va_mode = (mode_t)VNOVAL; 1155 } 1156 if (vap->va_uid != (uid_t)VNOVAL) { 1157 if (vap->va_uid == nvap->na_uid) 1158 vap->va_uid = (uid_t)VNOVAL; 1159 } 1160 if (vap->va_gid != (gid_t)VNOVAL) { 1161 if (vap->va_gid == nvap->na_gid) 1162 vap->va_gid = (gid_t)VNOVAL; 1163 } 1164 if (vap->va_size != VNOVAL) { 1165 if (vap->va_size == nvap->na_size) 1166 vap->va_size = VNOVAL; 1167 } 1168 1169 /* 1170 * We are normally called with only a partially initialized 1171 * VAP. Since the NFSv3 spec says that server may use the 1172 * file attributes to store the verifier, the spec requires 1173 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1174 * in atime, but we can't really assume that all servers will 1175 * so we ensure that our SETATTR sets both atime and mtime. 1176 * Set the VA_UTIMES_NULL flag for this case, so that 1177 * the server's time will be used. This is needed to 1178 * work around a bug in some Solaris servers, where 1179 * setting the time TOCLIENT causes the Setattr RPC 1180 * to return NFS_OK, but not set va_mode. 1181 */ 1182 if (vap->va_mtime.tv_sec == VNOVAL) { 1183 vfs_timestamp(&vap->va_mtime); 1184 vap->va_vaflags |= VA_UTIMES_NULL; 1185 } 1186 if (vap->va_atime.tv_sec == VNOVAL) 1187 vap->va_atime = vap->va_mtime; 1188 return (1); 1189 } 1190 1191 /* 1192 * Map nfsv4 errors to errno.h errors. 1193 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1194 * error should only be returned for the Open, Create and Setattr Ops. 1195 * As such, most calls can just pass in 0 for those arguments. 1196 */ 1197 APPLESTATIC int 1198 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1199 { 1200 struct proc *p; 1201 1202 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1203 return (error); 1204 if (td != NULL) 1205 p = td->td_proc; 1206 else 1207 p = NULL; 1208 switch (error) { 1209 case NFSERR_BADOWNER: 1210 tprintf(p, LOG_INFO, 1211 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1212 uid, gid); 1213 return (EPERM); 1214 case NFSERR_BADNAME: 1215 case NFSERR_BADCHAR: 1216 printf("nfsv4 char/name not handled by server\n"); 1217 return (ENOENT); 1218 case NFSERR_STALECLIENTID: 1219 case NFSERR_STALESTATEID: 1220 case NFSERR_EXPIRED: 1221 case NFSERR_BADSTATEID: 1222 case NFSERR_BADSESSION: 1223 printf("nfsv4 recover err returned %d\n", error); 1224 return (EIO); 1225 case NFSERR_BADHANDLE: 1226 case NFSERR_SERVERFAULT: 1227 case NFSERR_BADTYPE: 1228 case NFSERR_FHEXPIRED: 1229 case NFSERR_RESOURCE: 1230 case NFSERR_MOVED: 1231 case NFSERR_NOFILEHANDLE: 1232 case NFSERR_MINORVERMISMATCH: 1233 case NFSERR_OLDSTATEID: 1234 case NFSERR_BADSEQID: 1235 case NFSERR_LEASEMOVED: 1236 case NFSERR_RECLAIMBAD: 1237 case NFSERR_BADXDR: 1238 case NFSERR_OPILLEGAL: 1239 printf("nfsv4 client/server protocol prob err=%d\n", 1240 error); 1241 return (EIO); 1242 default: 1243 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1244 return (EIO); 1245 }; 1246 } 1247 1248 /* 1249 * Check to see if the process for this owner exists. Return 1 if it doesn't 1250 * and 0 otherwise. 1251 */ 1252 int 1253 nfscl_procdoesntexist(u_int8_t *own) 1254 { 1255 union { 1256 u_int32_t lval; 1257 u_int8_t cval[4]; 1258 } tl; 1259 struct proc *p; 1260 pid_t pid; 1261 int i, ret = 0; 1262 1263 /* For the single open_owner of all 0 bytes, just return 0. */ 1264 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1265 if (own[i] != 0) 1266 break; 1267 if (i == NFSV4CL_LOCKNAMELEN) 1268 return (0); 1269 1270 tl.cval[0] = *own++; 1271 tl.cval[1] = *own++; 1272 tl.cval[2] = *own++; 1273 tl.cval[3] = *own++; 1274 pid = tl.lval; 1275 p = pfind_locked(pid); 1276 if (p == NULL) 1277 return (1); 1278 if (p->p_stats == NULL) { 1279 PROC_UNLOCK(p); 1280 return (0); 1281 } 1282 tl.cval[0] = *own++; 1283 tl.cval[1] = *own++; 1284 tl.cval[2] = *own++; 1285 tl.cval[3] = *own++; 1286 if (tl.lval != p->p_stats->p_start.tv_sec) { 1287 ret = 1; 1288 } else { 1289 tl.cval[0] = *own++; 1290 tl.cval[1] = *own++; 1291 tl.cval[2] = *own++; 1292 tl.cval[3] = *own; 1293 if (tl.lval != p->p_stats->p_start.tv_usec) 1294 ret = 1; 1295 } 1296 PROC_UNLOCK(p); 1297 return (ret); 1298 } 1299 1300 /* 1301 * - nfs pseudo system call for the client 1302 */ 1303 /* 1304 * MPSAFE 1305 */ 1306 static int 1307 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1308 { 1309 struct file *fp; 1310 struct nfscbd_args nfscbdarg; 1311 struct nfsd_nfscbd_args nfscbdarg2; 1312 struct nameidata nd; 1313 struct nfscl_dumpmntopts dumpmntopts; 1314 cap_rights_t rights; 1315 char *buf; 1316 int error; 1317 struct mount *mp; 1318 struct nfsmount *nmp; 1319 1320 if (uap->flag & NFSSVC_CBADDSOCK) { 1321 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1322 if (error) 1323 return (error); 1324 /* 1325 * Since we don't know what rights might be required, 1326 * pretend that we need them all. It is better to be too 1327 * careful than too reckless. 1328 */ 1329 error = fget(td, nfscbdarg.sock, 1330 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1331 if (error) 1332 return (error); 1333 if (fp->f_type != DTYPE_SOCKET) { 1334 fdrop(fp, td); 1335 return (EPERM); 1336 } 1337 error = nfscbd_addsock(fp); 1338 fdrop(fp, td); 1339 if (!error && nfscl_enablecallb == 0) { 1340 nfsv4_cbport = nfscbdarg.port; 1341 nfscl_enablecallb = 1; 1342 } 1343 } else if (uap->flag & NFSSVC_NFSCBD) { 1344 if (uap->argp == NULL) 1345 return (EINVAL); 1346 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1347 sizeof(nfscbdarg2)); 1348 if (error) 1349 return (error); 1350 error = nfscbd_nfsd(td, &nfscbdarg2); 1351 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1352 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1353 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1354 dumpmntopts.ndmnt_blen > 1024)) 1355 error = EINVAL; 1356 if (error == 0) 1357 error = nfsrv_lookupfilename(&nd, 1358 dumpmntopts.ndmnt_fname, td); 1359 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1360 "nfs") != 0) { 1361 vput(nd.ni_vp); 1362 error = EINVAL; 1363 } 1364 if (error == 0) { 1365 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1366 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1367 dumpmntopts.ndmnt_blen); 1368 vput(nd.ni_vp); 1369 error = copyout(buf, dumpmntopts.ndmnt_buf, 1370 dumpmntopts.ndmnt_blen); 1371 free(buf, M_TEMP); 1372 } 1373 } else if (uap->flag & NFSSVC_FORCEDISM) { 1374 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 1375 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL); 1376 if (error == 0) { 1377 nmp = NULL; 1378 mtx_lock(&mountlist_mtx); 1379 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1380 if (strcmp(mp->mnt_stat.f_mntonname, buf) == 1381 0 && strcmp(mp->mnt_stat.f_fstypename, 1382 "nfs") == 0 && mp->mnt_data != NULL) { 1383 nmp = VFSTONFS(mp); 1384 mtx_lock(&nmp->nm_mtx); 1385 if ((nmp->nm_privflag & 1386 NFSMNTP_FORCEDISM) == 0) { 1387 nmp->nm_privflag |= 1388 (NFSMNTP_FORCEDISM | 1389 NFSMNTP_CANCELRPCS); 1390 mtx_unlock(&nmp->nm_mtx); 1391 } else { 1392 nmp = NULL; 1393 mtx_unlock(&nmp->nm_mtx); 1394 } 1395 break; 1396 } 1397 } 1398 mtx_unlock(&mountlist_mtx); 1399 1400 if (nmp != NULL) { 1401 /* 1402 * Call newnfs_nmcancelreqs() to cause 1403 * any RPCs in progress on the mount point to 1404 * fail. 1405 * This will cause any process waiting for an 1406 * RPC to complete while holding a vnode lock 1407 * on the mounted-on vnode (such as "df" or 1408 * a non-forced "umount") to fail. 1409 * This will unlock the mounted-on vnode so 1410 * a forced dismount can succeed. 1411 * Then clear NFSMNTP_CANCELRPCS and wakeup(), 1412 * so that nfs_unmount() can complete. 1413 */ 1414 newnfs_nmcancelreqs(nmp); 1415 mtx_lock(&nmp->nm_mtx); 1416 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 1417 wakeup(nmp); 1418 mtx_unlock(&nmp->nm_mtx); 1419 } else 1420 error = EINVAL; 1421 } 1422 free(buf, M_TEMP); 1423 } else { 1424 error = EINVAL; 1425 } 1426 return (error); 1427 } 1428 1429 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1430 1431 /* 1432 * Called once to initialize data structures... 1433 */ 1434 static int 1435 nfscl_modevent(module_t mod, int type, void *data) 1436 { 1437 int error = 0; 1438 static int loaded = 0; 1439 1440 switch (type) { 1441 case MOD_LOAD: 1442 if (loaded) 1443 return (0); 1444 newnfs_portinit(); 1445 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1446 nfscl_init(); 1447 NFSD_LOCK(); 1448 nfsrvd_cbinit(0); 1449 NFSD_UNLOCK(); 1450 ncl_call_invalcaches = ncl_invalcaches; 1451 nfsd_call_nfscl = nfssvc_nfscl; 1452 loaded = 1; 1453 break; 1454 1455 case MOD_UNLOAD: 1456 if (nfs_numnfscbd != 0) { 1457 error = EBUSY; 1458 break; 1459 } 1460 1461 /* 1462 * XXX: Unloading of nfscl module is unsupported. 1463 */ 1464 #if 0 1465 ncl_call_invalcaches = NULL; 1466 nfsd_call_nfscl = NULL; 1467 /* and get rid of the mutexes */ 1468 mtx_destroy(&ncl_iod_mutex); 1469 loaded = 0; 1470 break; 1471 #else 1472 /* FALLTHROUGH */ 1473 #endif 1474 default: 1475 error = EOPNOTSUPP; 1476 break; 1477 } 1478 return error; 1479 } 1480 static moduledata_t nfscl_mod = { 1481 "nfscl", 1482 nfscl_modevent, 1483 NULL, 1484 }; 1485 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1486 1487 /* So that loader and kldload(2) can find us, wherever we are.. */ 1488 MODULE_VERSION(nfscl, 1); 1489 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1490 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1491 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1492 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1493 1494