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 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95 35 */ 36 37 #include <sys/cdefs.h> 38 /* 39 * vnode op calls for Sun NFS version 2, 3 and 4 40 */ 41 42 #include "opt_inet.h" 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/resourcevar.h> 48 #include <sys/proc.h> 49 #include <sys/mount.h> 50 #include <sys/bio.h> 51 #include <sys/buf.h> 52 #include <sys/extattr.h> 53 #include <sys/filio.h> 54 #include <sys/jail.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/namei.h> 58 #include <sys/socket.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/sysctl.h> 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 #include <vm/vm_object.h> 70 #include <vm/vnode_pager.h> 71 72 #include <fs/nfs/nfsport.h> 73 #include <fs/nfsclient/nfsnode.h> 74 #include <fs/nfsclient/nfsmount.h> 75 #include <fs/nfsclient/nfs.h> 76 #include <fs/nfsclient/nfs_kdtrace.h> 77 78 #include <net/if.h> 79 #include <netinet/in.h> 80 #include <netinet/in_var.h> 81 82 #include <nfs/nfs_lock.h> 83 84 #ifdef KDTRACE_HOOKS 85 #include <sys/dtrace_bsd.h> 86 87 dtrace_nfsclient_accesscache_flush_probe_func_t 88 dtrace_nfscl_accesscache_flush_done_probe; 89 uint32_t nfscl_accesscache_flush_done_id; 90 91 dtrace_nfsclient_accesscache_get_probe_func_t 92 dtrace_nfscl_accesscache_get_hit_probe, 93 dtrace_nfscl_accesscache_get_miss_probe; 94 uint32_t nfscl_accesscache_get_hit_id; 95 uint32_t nfscl_accesscache_get_miss_id; 96 97 dtrace_nfsclient_accesscache_load_probe_func_t 98 dtrace_nfscl_accesscache_load_done_probe; 99 uint32_t nfscl_accesscache_load_done_id; 100 #endif /* !KDTRACE_HOOKS */ 101 102 /* Defs */ 103 #define TRUE 1 104 #define FALSE 0 105 106 extern struct nfsstatsv1 nfsstatsv1; 107 extern int nfsrv_useacl; 108 extern int nfscl_debuglevel; 109 NFSCLSTATEMUTEX; 110 MALLOC_DECLARE(M_NEWNFSREQ); 111 112 static vop_read_t nfsfifo_read; 113 static vop_write_t nfsfifo_write; 114 static vop_close_t nfsfifo_close; 115 static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *, 116 struct thread *); 117 static int nfs_get_namedattrdir(struct vnode *, struct componentname *, 118 struct vnode **); 119 static vop_lookup_t nfs_lookup; 120 static vop_create_t nfs_create; 121 static vop_mknod_t nfs_mknod; 122 static vop_open_t nfs_open; 123 static vop_pathconf_t nfs_pathconf; 124 static vop_close_t nfs_close; 125 static vop_access_t nfs_access; 126 static vop_getattr_t nfs_getattr; 127 static vop_setattr_t nfs_setattr; 128 static vop_read_t nfs_read; 129 static vop_fsync_t nfs_fsync; 130 static vop_remove_t nfs_remove; 131 static vop_link_t nfs_link; 132 static vop_rename_t nfs_rename; 133 static vop_mkdir_t nfs_mkdir; 134 static vop_rmdir_t nfs_rmdir; 135 static vop_symlink_t nfs_symlink; 136 static vop_readdir_t nfs_readdir; 137 static vop_strategy_t nfs_strategy; 138 static int nfs_lookitup(struct vnode *, char *, int, 139 struct ucred *, struct thread *, struct nfsnode **); 140 static int nfs_sillyrename(struct vnode *, struct vnode *, 141 struct componentname *); 142 static vop_access_t nfsspec_access; 143 static vop_readlink_t nfs_readlink; 144 static vop_print_t nfs_print; 145 static vop_advlock_t nfs_advlock; 146 static vop_advlockasync_t nfs_advlockasync; 147 static vop_getacl_t nfs_getacl; 148 static vop_setacl_t nfs_setacl; 149 static vop_advise_t nfs_advise; 150 static vop_allocate_t nfs_allocate; 151 static vop_deallocate_t nfs_deallocate; 152 static vop_copy_file_range_t nfs_copy_file_range; 153 static vop_ioctl_t nfs_ioctl; 154 static vop_getextattr_t nfs_getextattr; 155 static vop_setextattr_t nfs_setextattr; 156 static vop_listextattr_t nfs_listextattr; 157 static vop_deleteextattr_t nfs_deleteextattr; 158 static vop_lock1_t nfs_lock; 159 160 /* 161 * Global vfs data structures for nfs 162 */ 163 164 static struct vop_vector newnfs_vnodeops_nosig = { 165 .vop_default = &default_vnodeops, 166 .vop_access = nfs_access, 167 .vop_advlock = nfs_advlock, 168 .vop_advlockasync = nfs_advlockasync, 169 .vop_close = nfs_close, 170 .vop_create = nfs_create, 171 .vop_fsync = nfs_fsync, 172 .vop_getattr = nfs_getattr, 173 .vop_getpages = ncl_getpages, 174 .vop_putpages = ncl_putpages, 175 .vop_inactive = ncl_inactive, 176 .vop_link = nfs_link, 177 .vop_lock1 = nfs_lock, 178 .vop_lookup = nfs_lookup, 179 .vop_mkdir = nfs_mkdir, 180 .vop_mknod = nfs_mknod, 181 .vop_open = nfs_open, 182 .vop_pathconf = nfs_pathconf, 183 .vop_print = nfs_print, 184 .vop_read = nfs_read, 185 .vop_readdir = nfs_readdir, 186 .vop_readlink = nfs_readlink, 187 .vop_reclaim = ncl_reclaim, 188 .vop_remove = nfs_remove, 189 .vop_rename = nfs_rename, 190 .vop_rmdir = nfs_rmdir, 191 .vop_setattr = nfs_setattr, 192 .vop_strategy = nfs_strategy, 193 .vop_symlink = nfs_symlink, 194 .vop_write = ncl_write, 195 .vop_getacl = nfs_getacl, 196 .vop_setacl = nfs_setacl, 197 .vop_advise = nfs_advise, 198 .vop_allocate = nfs_allocate, 199 .vop_deallocate = nfs_deallocate, 200 .vop_copy_file_range = nfs_copy_file_range, 201 .vop_ioctl = nfs_ioctl, 202 .vop_getextattr = nfs_getextattr, 203 .vop_setextattr = nfs_setextattr, 204 .vop_listextattr = nfs_listextattr, 205 .vop_deleteextattr = nfs_deleteextattr, 206 }; 207 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops_nosig); 208 209 static int 210 nfs_vnodeops_bypass(struct vop_generic_args *a) 211 { 212 213 return (vop_sigdefer(&newnfs_vnodeops_nosig, a)); 214 } 215 216 struct vop_vector newnfs_vnodeops = { 217 .vop_default = &default_vnodeops, 218 .vop_bypass = nfs_vnodeops_bypass, 219 }; 220 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops); 221 222 static struct vop_vector newnfs_fifoops_nosig = { 223 .vop_default = &fifo_specops, 224 .vop_access = nfsspec_access, 225 .vop_close = nfsfifo_close, 226 .vop_fsync = nfs_fsync, 227 .vop_getattr = nfs_getattr, 228 .vop_inactive = ncl_inactive, 229 .vop_pathconf = nfs_pathconf, 230 .vop_print = nfs_print, 231 .vop_read = nfsfifo_read, 232 .vop_reclaim = ncl_reclaim, 233 .vop_setattr = nfs_setattr, 234 .vop_write = nfsfifo_write, 235 }; 236 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops_nosig); 237 238 static int 239 nfs_fifoops_bypass(struct vop_generic_args *a) 240 { 241 242 return (vop_sigdefer(&newnfs_fifoops_nosig, a)); 243 } 244 245 struct vop_vector newnfs_fifoops = { 246 .vop_default = &default_vnodeops, 247 .vop_bypass = nfs_fifoops_bypass, 248 }; 249 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops); 250 251 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, 252 struct componentname *cnp, struct vattr *vap); 253 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 254 int namelen, struct ucred *cred, struct thread *td, bool silly); 255 static void nfs_removestatus(struct vnode *vp, nfsremove_status file_status, 256 bool silly, struct thread *td); 257 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, 258 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp, 259 char *tnameptr, int tnamelen, bool silly, struct ucred *cred, 260 struct thread *td); 261 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp, 262 struct componentname *scnp, struct sillyrename *sp); 263 264 /* 265 * Global variables 266 */ 267 SYSCTL_DECL(_vfs_nfs); 268 269 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; 270 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 271 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 272 273 static int nfs_prime_access_cache = 0; 274 SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW, 275 &nfs_prime_access_cache, 0, 276 "Prime NFS ACCESS cache when fetching attributes"); 277 278 static int newnfs_commit_on_close = 0; 279 SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW, 280 &newnfs_commit_on_close, 0, "write+commit on close, else only write"); 281 282 static int nfs_clean_pages_on_close = 1; 283 SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW, 284 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close"); 285 286 int newnfs_directio_enable = 0; 287 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW, 288 &newnfs_directio_enable, 0, "Enable NFS directio"); 289 290 int nfs_keep_dirty_on_error; 291 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW, 292 &nfs_keep_dirty_on_error, 0, "Retry pageout if error returned"); 293 294 /* 295 * This sysctl allows other processes to mmap a file that has been opened 296 * O_DIRECT by a process. In general, having processes mmap the file while 297 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow 298 * this by default to prevent DoS attacks - to prevent a malicious user from 299 * opening up files O_DIRECT preventing other users from mmap'ing these 300 * files. "Protected" environments where stricter consistency guarantees are 301 * required can disable this knob. The process that opened the file O_DIRECT 302 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not 303 * meaningful. 304 */ 305 int newnfs_directio_allow_mmap = 1; 306 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW, 307 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens"); 308 309 static uint64_t nfs_maxalloclen = 64 * 1024 * 1024; 310 SYSCTL_U64(_vfs_nfs, OID_AUTO, maxalloclen, CTLFLAG_RW, 311 &nfs_maxalloclen, 0, "NFS max allocate/deallocate length"); 312 313 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \ 314 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \ 315 | NFSACCESS_DELETE | NFSACCESS_LOOKUP) 316 317 /* 318 * SMP Locking Note : 319 * The list of locks after the description of the lock is the ordering 320 * of other locks acquired with the lock held. 321 * np->n_mtx : Protects the fields in the nfsnode. 322 VM Object Lock 323 VI_MTX (acquired indirectly) 324 * nmp->nm_mtx : Protects the fields in the nfsmount. 325 rep->r_mtx 326 * ncl_iod_mutex : Global lock, protects shared nfsiod state. 327 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list. 328 nmp->nm_mtx 329 rep->r_mtx 330 * rep->r_mtx : Protects the fields in an nfsreq. 331 */ 332 333 static int 334 nfs_lock(struct vop_lock1_args *ap) 335 { 336 struct vnode *vp; 337 struct nfsnode *np; 338 u_quad_t nsize; 339 int error, lktype; 340 bool onfault; 341 342 vp = ap->a_vp; 343 lktype = ap->a_flags & LK_TYPE_MASK; 344 error = VOP_LOCK1_APV(&default_vnodeops, ap); 345 if (error != 0 || vp->v_op != &newnfs_vnodeops) 346 return (error); 347 np = VTONFS(vp); 348 if (np == NULL) 349 return (0); 350 NFSLOCKNODE(np); 351 if ((np->n_flag & NVNSETSZSKIP) == 0 || (lktype != LK_SHARED && 352 lktype != LK_EXCLUSIVE && lktype != LK_UPGRADE && 353 lktype != LK_TRYUPGRADE)) { 354 NFSUNLOCKNODE(np); 355 return (0); 356 } 357 onfault = (ap->a_flags & LK_EATTR_MASK) == LK_NOWAIT && 358 (ap->a_flags & LK_INIT_MASK) == LK_CANRECURSE && 359 (lktype == LK_SHARED || lktype == LK_EXCLUSIVE); 360 if (onfault && vp->v_vnlock->lk_recurse == 0) { 361 /* 362 * Force retry in vm_fault(), to make the lock request 363 * sleepable, which allows us to piggy-back the 364 * sleepable call to vnode_pager_setsize(). 365 */ 366 NFSUNLOCKNODE(np); 367 VOP_UNLOCK(vp); 368 return (EBUSY); 369 } 370 if ((ap->a_flags & LK_NOWAIT) != 0 || 371 (lktype == LK_SHARED && vp->v_vnlock->lk_recurse > 0)) { 372 NFSUNLOCKNODE(np); 373 return (0); 374 } 375 if (lktype == LK_SHARED) { 376 NFSUNLOCKNODE(np); 377 VOP_UNLOCK(vp); 378 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK); 379 ap->a_flags |= LK_EXCLUSIVE; 380 error = VOP_LOCK1_APV(&default_vnodeops, ap); 381 if (error != 0 || vp->v_op != &newnfs_vnodeops) 382 return (error); 383 if (vp->v_data == NULL) 384 goto downgrade; 385 MPASS(vp->v_data == np); 386 NFSLOCKNODE(np); 387 if ((np->n_flag & NVNSETSZSKIP) == 0) { 388 NFSUNLOCKNODE(np); 389 goto downgrade; 390 } 391 } 392 np->n_flag &= ~NVNSETSZSKIP; 393 nsize = np->n_size; 394 NFSUNLOCKNODE(np); 395 vnode_pager_setsize(vp, nsize); 396 downgrade: 397 if (lktype == LK_SHARED) { 398 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK); 399 ap->a_flags |= LK_DOWNGRADE; 400 (void)VOP_LOCK1_APV(&default_vnodeops, ap); 401 } 402 return (0); 403 } 404 405 static int 406 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td, 407 struct ucred *cred, u_int32_t *retmode) 408 { 409 int error = 0, attrflag, i, lrupos; 410 u_int32_t rmode; 411 struct nfsnode *np = VTONFS(vp); 412 struct nfsvattr nfsva; 413 414 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag, 415 &rmode); 416 if (attrflag) 417 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 418 if (!error) { 419 lrupos = 0; 420 NFSLOCKNODE(np); 421 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 422 if (np->n_accesscache[i].uid == cred->cr_uid) { 423 np->n_accesscache[i].mode = rmode; 424 np->n_accesscache[i].stamp = time_second; 425 break; 426 } 427 if (i > 0 && np->n_accesscache[i].stamp < 428 np->n_accesscache[lrupos].stamp) 429 lrupos = i; 430 } 431 if (i == NFS_ACCESSCACHESIZE) { 432 np->n_accesscache[lrupos].uid = cred->cr_uid; 433 np->n_accesscache[lrupos].mode = rmode; 434 np->n_accesscache[lrupos].stamp = time_second; 435 } 436 NFSUNLOCKNODE(np); 437 if (retmode != NULL) 438 *retmode = rmode; 439 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0); 440 } else if (NFS_ISV4(vp)) { 441 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 442 } 443 #ifdef KDTRACE_HOOKS 444 if (error != 0) 445 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0, 446 error); 447 #endif 448 return (error); 449 } 450 451 /* 452 * nfs access vnode op. 453 * For nfs version 2, just return ok. File accesses may fail later. 454 * For nfs version 3, use the access rpc to check accessibility. If file modes 455 * are changed on the server, accesses might still fail later. 456 */ 457 static int 458 nfs_access(struct vop_access_args *ap) 459 { 460 struct vnode *vp = ap->a_vp; 461 int error = 0, i, gotahit; 462 u_int32_t mode, wmode, rmode; 463 int v34 = NFS_ISV34(vp); 464 struct nfsnode *np = VTONFS(vp); 465 466 /* 467 * Disallow write attempts on filesystems mounted read-only; 468 * unless the file is a socket, fifo, or a block or character 469 * device resident on the filesystem. 470 */ 471 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS | 472 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL | 473 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 474 switch (vp->v_type) { 475 case VREG: 476 case VDIR: 477 case VLNK: 478 return (EROFS); 479 default: 480 break; 481 } 482 } 483 484 /* 485 * For NFSv4, check for a delegation with an Allow ACE, to see 486 * if that permits access. 487 */ 488 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) != 0) { 489 error = nfscl_delegacecheck(vp, ap->a_accmode, ap->a_cred); 490 if (error == 0) 491 return (error); 492 error = 0; 493 } 494 495 /* 496 * For nfs v3 or v4, check to see if we have done this recently, and if 497 * so return our cached result instead of making an ACCESS call. 498 * If not, do an access rpc, otherwise you are stuck emulating 499 * ufs_access() locally using the vattr. This may not be correct, 500 * since the server may apply other access criteria such as 501 * client uid-->server uid mapping that we do not know about. 502 */ 503 if (v34) { 504 if (ap->a_accmode & VREAD) 505 mode = NFSACCESS_READ; 506 else 507 mode = 0; 508 if (vp->v_type != VDIR) { 509 if (ap->a_accmode & VWRITE) 510 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 511 if (ap->a_accmode & VAPPEND) 512 mode |= NFSACCESS_EXTEND; 513 if (ap->a_accmode & VEXEC) 514 mode |= NFSACCESS_EXECUTE; 515 if (ap->a_accmode & VDELETE) 516 mode |= NFSACCESS_DELETE; 517 } else { 518 if (ap->a_accmode & VWRITE) 519 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 520 if (ap->a_accmode & VAPPEND) 521 mode |= NFSACCESS_EXTEND; 522 if (ap->a_accmode & VEXEC) 523 mode |= NFSACCESS_LOOKUP; 524 if (ap->a_accmode & VDELETE) 525 mode |= NFSACCESS_DELETE; 526 if (ap->a_accmode & VDELETE_CHILD) 527 mode |= NFSACCESS_MODIFY; 528 } 529 /* XXX safety belt, only make blanket request if caching */ 530 if (nfsaccess_cache_timeout > 0) { 531 wmode = NFSACCESS_READ | NFSACCESS_MODIFY | 532 NFSACCESS_EXTEND | NFSACCESS_EXECUTE | 533 NFSACCESS_DELETE | NFSACCESS_LOOKUP; 534 } else { 535 wmode = mode; 536 } 537 538 /* 539 * Does our cached result allow us to give a definite yes to 540 * this request? 541 */ 542 gotahit = 0; 543 NFSLOCKNODE(np); 544 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 545 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) { 546 if (time_second < (np->n_accesscache[i].stamp 547 + nfsaccess_cache_timeout) && 548 (np->n_accesscache[i].mode & mode) == mode) { 549 NFSINCRGLOBAL(nfsstatsv1.accesscache_hits); 550 gotahit = 1; 551 } 552 break; 553 } 554 } 555 NFSUNLOCKNODE(np); 556 #ifdef KDTRACE_HOOKS 557 if (gotahit != 0) 558 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp, 559 ap->a_cred->cr_uid, mode); 560 else 561 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp, 562 ap->a_cred->cr_uid, mode); 563 #endif 564 if (gotahit == 0) { 565 /* 566 * Either a no, or a don't know. Go to the wire. 567 */ 568 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses); 569 error = nfs34_access_otw(vp, wmode, ap->a_td, 570 ap->a_cred, &rmode); 571 if (!error && 572 (rmode & mode) != mode) 573 error = EACCES; 574 } 575 return (error); 576 } else { 577 if ((error = nfsspec_access(ap)) != 0) { 578 return (error); 579 } 580 /* 581 * Attempt to prevent a mapped root from accessing a file 582 * which it shouldn't. We try to read a byte from the file 583 * if the user is root and the file is not zero length. 584 * After calling nfsspec_access, we should have the correct 585 * file size cached. 586 */ 587 NFSLOCKNODE(np); 588 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD) 589 && VTONFS(vp)->n_size > 0) { 590 struct iovec aiov; 591 struct uio auio; 592 char buf[1]; 593 594 NFSUNLOCKNODE(np); 595 aiov.iov_base = buf; 596 aiov.iov_len = 1; 597 auio.uio_iov = &aiov; 598 auio.uio_iovcnt = 1; 599 auio.uio_offset = 0; 600 auio.uio_resid = 1; 601 auio.uio_segflg = UIO_SYSSPACE; 602 auio.uio_rw = UIO_READ; 603 auio.uio_td = ap->a_td; 604 605 if (vp->v_type == VREG) 606 error = ncl_readrpc(vp, &auio, ap->a_cred); 607 else if (vp->v_type == VDIR) { 608 char* bp; 609 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 610 aiov.iov_base = bp; 611 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 612 error = ncl_readdirrpc(vp, &auio, ap->a_cred, 613 ap->a_td); 614 free(bp, M_TEMP); 615 } else if (vp->v_type == VLNK) 616 error = ncl_readlinkrpc(vp, &auio, ap->a_cred); 617 else 618 error = EACCES; 619 } else 620 NFSUNLOCKNODE(np); 621 return (error); 622 } 623 } 624 625 /* 626 * nfs open vnode op 627 * Check to see if the type is ok 628 * and that deletion is not in progress. 629 * For paged in text files, you will need to flush the page cache 630 * if consistency is lost. 631 */ 632 /* ARGSUSED */ 633 static int 634 nfs_open(struct vop_open_args *ap) 635 { 636 struct vnode *vp = ap->a_vp; 637 struct nfsnode *np = VTONFS(vp); 638 struct vattr vattr; 639 int error; 640 int fmode = ap->a_mode; 641 struct ucred *cred; 642 vm_object_t obj; 643 644 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 645 return (EOPNOTSUPP); 646 647 /* 648 * For NFSv4, we need to do the Open Op before cache validation, 649 * so that we conform to RFC3530 Sec. 9.3.1. 650 */ 651 if (NFS_ISV4(vp)) { 652 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td); 653 if (error) { 654 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 655 (gid_t)0); 656 return (error); 657 } 658 } 659 660 /* 661 * Now, if this Open will be doing reading, re-validate/flush the 662 * cache, so that Close/Open coherency is maintained. 663 */ 664 NFSLOCKNODE(np); 665 if (np->n_flag & NMODIFIED) { 666 NFSUNLOCKNODE(np); 667 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 668 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 669 if (VN_IS_DOOMED(vp)) 670 return (EBADF); 671 } 672 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 673 if (error == EINTR || error == EIO) { 674 if (NFS_ISV4(vp)) 675 (void) nfsrpc_close(vp, 0, ap->a_td); 676 return (error); 677 } 678 NFSLOCKNODE(np); 679 np->n_attrstamp = 0; 680 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 681 if (vp->v_type == VDIR) 682 np->n_direofoffset = 0; 683 NFSUNLOCKNODE(np); 684 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 685 if (error) { 686 if (NFS_ISV4(vp)) 687 (void) nfsrpc_close(vp, 0, ap->a_td); 688 return (error); 689 } 690 NFSLOCKNODE(np); 691 np->n_mtime = vattr.va_mtime; 692 if (NFS_ISV4(vp)) 693 np->n_change = vattr.va_filerev; 694 } else { 695 NFSUNLOCKNODE(np); 696 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 697 if (error) { 698 if (NFS_ISV4(vp)) 699 (void) nfsrpc_close(vp, 0, ap->a_td); 700 return (error); 701 } 702 NFSLOCKNODE(np); 703 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) || 704 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 705 if (vp->v_type == VDIR) 706 np->n_direofoffset = 0; 707 NFSUNLOCKNODE(np); 708 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 709 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 710 if (VN_IS_DOOMED(vp)) 711 return (EBADF); 712 } 713 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 714 if (error == EINTR || error == EIO) { 715 if (NFS_ISV4(vp)) 716 (void) nfsrpc_close(vp, 0, ap->a_td); 717 return (error); 718 } 719 NFSLOCKNODE(np); 720 np->n_mtime = vattr.va_mtime; 721 if (NFS_ISV4(vp)) 722 np->n_change = vattr.va_filerev; 723 } 724 } 725 726 /* 727 * If the object has >= 1 O_DIRECT active opens, we disable caching. 728 */ 729 if (newnfs_directio_enable && (fmode & O_DIRECT) && 730 (vp->v_type == VREG)) { 731 if (np->n_directio_opens == 0) { 732 NFSUNLOCKNODE(np); 733 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 734 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 735 if (VN_IS_DOOMED(vp)) 736 return (EBADF); 737 } 738 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 739 if (error) { 740 if (NFS_ISV4(vp)) 741 (void) nfsrpc_close(vp, 0, ap->a_td); 742 return (error); 743 } 744 NFSLOCKNODE(np); 745 np->n_flag |= NNONCACHE; 746 } 747 np->n_directio_opens++; 748 } 749 750 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */ 751 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0) 752 np->n_flag |= NWRITEOPENED; 753 754 /* 755 * If this is an open for writing, capture a reference to the 756 * credentials, so they can be used by ncl_putpages(). Using 757 * these write credentials is preferable to the credentials of 758 * whatever thread happens to be doing the VOP_PUTPAGES() since 759 * the write RPCs are less likely to fail with EACCES. 760 */ 761 if ((fmode & FWRITE) != 0) { 762 cred = np->n_writecred; 763 np->n_writecred = crhold(ap->a_cred); 764 } else 765 cred = NULL; 766 NFSUNLOCKNODE(np); 767 768 if (cred != NULL) 769 crfree(cred); 770 vnode_create_vobject(vp, vattr.va_size, ap->a_td); 771 772 /* 773 * If the text file has been mmap'd, flush any dirty pages to the 774 * buffer cache and then... 775 * Make sure all writes are pushed to the NFS server. If this is not 776 * done, the modify time of the file can change while the text 777 * file is being executed. This will cause the process that is 778 * executing the text file to be terminated. 779 */ 780 if (vp->v_writecount <= -1) { 781 if ((obj = vp->v_object) != NULL && 782 vm_object_mightbedirty(obj)) { 783 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 784 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 785 if (VN_IS_DOOMED(vp)) 786 return (EBADF); 787 } 788 vnode_pager_clean_sync(vp); 789 } 790 791 /* Now, flush the buffer cache. */ 792 ncl_flush(vp, MNT_WAIT, curthread, 0, 0); 793 794 /* And, finally, make sure that n_mtime is up to date. */ 795 np = VTONFS(vp); 796 NFSLOCKNODE(np); 797 np->n_mtime = np->n_vattr.na_mtime; 798 NFSUNLOCKNODE(np); 799 } 800 return (0); 801 } 802 803 /* 804 * nfs close vnode op 805 * What an NFS client should do upon close after writing is a debatable issue. 806 * Most NFS clients push delayed writes to the server upon close, basically for 807 * two reasons: 808 * 1 - So that any write errors may be reported back to the client process 809 * doing the close system call. By far the two most likely errors are 810 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 811 * 2 - To put a worst case upper bound on cache inconsistency between 812 * multiple clients for the file. 813 * There is also a consistency problem for Version 2 of the protocol w.r.t. 814 * not being able to tell if other clients are writing a file concurrently, 815 * since there is no way of knowing if the changed modify time in the reply 816 * is only due to the write for this client. 817 * (NFS Version 3 provides weak cache consistency data in the reply that 818 * should be sufficient to detect and handle this case.) 819 * 820 * The current code does the following: 821 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 822 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 823 * or commit them (this satisfies 1 and 2 except for the 824 * case where the server crashes after this close but 825 * before the commit RPC, which is felt to be "good 826 * enough". Changing the last argument to ncl_flush() to 827 * a 1 would force a commit operation, if it is felt a 828 * commit is necessary now. 829 * for NFS Version 4 - flush the dirty buffers and commit them, if 830 * nfscl_mustflush() says this is necessary. 831 * It is necessary if there is no write delegation held, 832 * in order to satisfy open/close coherency. 833 * If the file isn't cached on local stable storage, 834 * it may be necessary in order to detect "out of space" 835 * errors from the server, if the write delegation 836 * issued by the server doesn't allow the file to grow. 837 */ 838 /* ARGSUSED */ 839 static int 840 nfs_close(struct vop_close_args *ap) 841 { 842 struct vnode *vp = ap->a_vp; 843 struct nfsnode *np = VTONFS(vp); 844 struct nfsvattr nfsva; 845 struct ucred *cred; 846 int error = 0, ret, localcred = 0; 847 int fmode = ap->a_fflag; 848 struct nfsmount *nmp; 849 850 if (NFSCL_FORCEDISM(vp->v_mount)) 851 return (0); 852 nmp = VFSTONFS(vp->v_mount); 853 /* 854 * During shutdown, a_cred isn't valid, so just use root. 855 */ 856 if (ap->a_cred == NOCRED) { 857 cred = newnfs_getcred(); 858 localcred = 1; 859 } else { 860 cred = ap->a_cred; 861 } 862 if (vp->v_type == VREG) { 863 /* 864 * Examine and clean dirty pages, regardless of NMODIFIED. 865 * This closes a major hole in close-to-open consistency. 866 * We want to push out all dirty pages (and buffers) on 867 * close, regardless of whether they were dirtied by 868 * mmap'ed writes or via write(). 869 */ 870 if (nfs_clean_pages_on_close && vp->v_object) { 871 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 872 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 873 if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK) 874 return (EBADF); 875 } 876 vnode_pager_clean_async(vp); 877 } 878 NFSLOCKNODE(np); 879 if (np->n_flag & NMODIFIED) { 880 NFSUNLOCKNODE(np); 881 if (NFS_ISV3(vp)) { 882 /* 883 * Under NFSv3 we have dirty buffers to dispose of. We 884 * must flush them to the NFS server. We have the option 885 * of waiting all the way through the commit rpc or just 886 * waiting for the initial write. The default is to only 887 * wait through the initial write so the data is in the 888 * server's cache, which is roughly similar to the state 889 * a standard disk subsystem leaves the file in on close(). 890 * 891 * We cannot clear the NMODIFIED bit in np->n_flag due to 892 * potential races with other processes, and certainly 893 * cannot clear it if we don't commit. 894 * These races occur when there is no longer the old 895 * traditional vnode locking implemented for Vnode Ops. 896 */ 897 int cm = newnfs_commit_on_close ? 1 : 0; 898 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 899 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 900 if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK) 901 return (EBADF); 902 } 903 error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0); 904 /* np->n_flag &= ~NMODIFIED; */ 905 } else if (NFS_ISV4(vp)) { 906 if (!NFSHASNFSV4N(nmp) || 907 (nmp->nm_flag & NFSMNT_NOCTO) == 0 || 908 nfscl_mustflush(vp) != 0) { 909 int cm = newnfs_commit_on_close ? 1 : 0; 910 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 911 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 912 if (VN_IS_DOOMED(vp) && ap->a_fflag != 913 FNONBLOCK) 914 return (EBADF); 915 } 916 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 917 cm, 0); 918 /* 919 * as above w.r.t races when clearing 920 * NMODIFIED. 921 * np->n_flag &= ~NMODIFIED; 922 */ 923 } 924 } else { 925 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 926 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 927 if (VN_IS_DOOMED(vp) && ap->a_fflag != 928 FNONBLOCK) 929 return (EBADF); 930 } 931 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 932 } 933 NFSLOCKNODE(np); 934 } 935 /* 936 * Invalidate the attribute cache in all cases. 937 * An open is going to fetch fresh attrs any way, other procs 938 * on this node that have file open will be forced to do an 939 * otw attr fetch, but this is safe. 940 * --> A user found that their RPC count dropped by 20% when 941 * this was commented out and I can't see any requirement 942 * for it, so I've disabled it when negative lookups are 943 * enabled. (What does this have to do with negative lookup 944 * caching? Well nothing, except it was reported by the 945 * same user that needed negative lookup caching and I wanted 946 * there to be a way to disable it to see if it 947 * is the cause of some caching/coherency issue that might 948 * crop up.) 949 */ 950 if (nmp->nm_negnametimeo == 0) { 951 np->n_attrstamp = 0; 952 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 953 } 954 if (np->n_flag & NWRITEERR) { 955 np->n_flag &= ~NWRITEERR; 956 error = np->n_error; 957 } 958 NFSUNLOCKNODE(np); 959 } 960 961 if (NFS_ISV4(vp)) { 962 /* 963 * Get attributes so "change" is up to date. 964 */ 965 if (error == 0 && nfscl_nodeleg(vp, 0) != 0 && 966 vp->v_type == VREG && 967 (nmp->nm_flag & NFSMNT_NOCTO) == 0) { 968 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva); 969 if (!ret) { 970 np->n_change = nfsva.na_filerev; 971 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 972 0, 0); 973 } 974 } 975 976 /* 977 * and do the close. 978 */ 979 ret = nfsrpc_close(vp, 0, ap->a_td); 980 if (!error && ret) 981 error = ret; 982 if (error) 983 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 984 (gid_t)0); 985 } 986 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { 987 NFSLOCKNODE(np); 988 KASSERT((np->n_directio_opens > 0), 989 ("nfs_close: unexpectedly value (0) of n_directio_opens\n")); 990 np->n_directio_opens--; 991 if (np->n_directio_opens == 0) 992 np->n_flag &= ~NNONCACHE; 993 NFSUNLOCKNODE(np); 994 } 995 if (localcred) 996 NFSFREECRED(cred); 997 return (error); 998 } 999 1000 /* 1001 * nfs getattr call from vfs. 1002 */ 1003 static int 1004 nfs_getattr(struct vop_getattr_args *ap) 1005 { 1006 struct vnode *vp = ap->a_vp; 1007 struct thread *td = curthread; /* XXX */ 1008 struct nfsnode *np = VTONFS(vp); 1009 int error = 0; 1010 struct nfsvattr nfsva; 1011 struct vattr *vap = ap->a_vap; 1012 struct vattr vattr; 1013 struct nfsmount *nmp; 1014 1015 nmp = VFSTONFS(vp->v_mount); 1016 /* 1017 * Update local times for special files. 1018 */ 1019 NFSLOCKNODE(np); 1020 if (np->n_flag & (NACC | NUPD)) 1021 np->n_flag |= NCHG; 1022 NFSUNLOCKNODE(np); 1023 /* 1024 * First look in the cache. 1025 * For "syskrb5" mounts, nm_fhsize might still be zero and 1026 * cached attributes should be ignored. 1027 */ 1028 if (nmp->nm_fhsize > 0 && ncl_getattrcache(vp, &vattr) == 0) { 1029 ncl_copy_vattr(vap, &vattr); 1030 1031 /* 1032 * Get the local modify time for the case of a write 1033 * delegation. 1034 */ 1035 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1036 return (0); 1037 } 1038 1039 if (NFS_ISV34(vp) && nfs_prime_access_cache && 1040 nfsaccess_cache_timeout > 0) { 1041 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses); 1042 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL); 1043 if (ncl_getattrcache(vp, ap->a_vap) == 0) { 1044 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime); 1045 return (0); 1046 } 1047 } 1048 1049 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva); 1050 if (error == 0) 1051 error = nfscl_loadattrcache(&vp, &nfsva, vap, 0, 0); 1052 if (!error) { 1053 /* 1054 * Get the local modify time for the case of a write 1055 * delegation. 1056 */ 1057 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1058 } else if (NFS_ISV4(vp)) { 1059 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1060 } 1061 return (error); 1062 } 1063 1064 /* 1065 * nfs setattr call. 1066 */ 1067 static int 1068 nfs_setattr(struct vop_setattr_args *ap) 1069 { 1070 struct vnode *vp = ap->a_vp; 1071 struct nfsnode *np = VTONFS(vp); 1072 struct thread *td = curthread; /* XXX */ 1073 struct vattr *vap = ap->a_vap; 1074 int error = 0; 1075 u_quad_t tsize; 1076 struct timespec ts; 1077 struct nfsmount *nmp; 1078 1079 #ifndef nolint 1080 tsize = (u_quad_t)0; 1081 #endif 1082 1083 /* 1084 * Only setting of UF_HIDDEN and UF_SYSTEM are supported and 1085 * only for NFSv4 servers that support them. 1086 */ 1087 nmp = VFSTONFS(vp->v_mount); 1088 if (vap->va_flags != VNOVAL && (!NFSHASNFSV4(nmp) || 1089 (vap->va_flags & ~(UF_HIDDEN | UF_SYSTEM)) != 0 || 1090 ((vap->va_flags & UF_HIDDEN) != 0 && 1091 !NFSISSET_ATTRBIT(&np->n_vattr.na_suppattr, NFSATTRBIT_HIDDEN)) || 1092 ((vap->va_flags & UF_SYSTEM) != 0 && 1093 !NFSISSET_ATTRBIT(&np->n_vattr.na_suppattr, NFSATTRBIT_SYSTEM)))) 1094 return (EOPNOTSUPP); 1095 1096 /* 1097 * Disallow write attempts if the filesystem is mounted read-only. 1098 */ 1099 if ((vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 1100 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 1101 vap->va_mtime.tv_sec != VNOVAL || 1102 vap->va_birthtime.tv_sec != VNOVAL || 1103 vap->va_mode != (mode_t)VNOVAL) && 1104 (vp->v_mount->mnt_flag & MNT_RDONLY)) 1105 return (EROFS); 1106 if (vap->va_size != VNOVAL) { 1107 switch (vp->v_type) { 1108 case VDIR: 1109 return (EISDIR); 1110 case VCHR: 1111 case VBLK: 1112 case VSOCK: 1113 case VFIFO: 1114 if (vap->va_mtime.tv_sec == VNOVAL && 1115 vap->va_atime.tv_sec == VNOVAL && 1116 vap->va_birthtime.tv_sec == VNOVAL && 1117 vap->va_mode == (mode_t)VNOVAL && 1118 vap->va_uid == (uid_t)VNOVAL && 1119 vap->va_gid == (gid_t)VNOVAL) 1120 return (0); 1121 vap->va_size = VNOVAL; 1122 break; 1123 default: 1124 /* 1125 * Disallow write attempts if the filesystem is 1126 * mounted read-only. 1127 */ 1128 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1129 return (EROFS); 1130 /* 1131 * We run vnode_pager_setsize() early (why?), 1132 * we must set np->n_size now to avoid vinvalbuf 1133 * V_SAVE races that might setsize a lower 1134 * value. 1135 */ 1136 NFSLOCKNODE(np); 1137 tsize = np->n_size; 1138 NFSUNLOCKNODE(np); 1139 error = ncl_meta_setsize(vp, td, vap->va_size); 1140 NFSLOCKNODE(np); 1141 if (np->n_flag & NMODIFIED) { 1142 tsize = np->n_size; 1143 NFSUNLOCKNODE(np); 1144 error = ncl_vinvalbuf(vp, vap->va_size == 0 ? 1145 0 : V_SAVE, td, 1); 1146 if (error != 0) { 1147 vnode_pager_setsize(vp, tsize); 1148 return (error); 1149 } 1150 /* 1151 * Call nfscl_delegmodtime() to set the modify time 1152 * locally, as required. 1153 */ 1154 nfscl_delegmodtime(vp, NULL); 1155 } else 1156 NFSUNLOCKNODE(np); 1157 /* 1158 * np->n_size has already been set to vap->va_size 1159 * in ncl_meta_setsize(). We must set it again since 1160 * nfs_loadattrcache() could be called through 1161 * ncl_meta_setsize() and could modify np->n_size. 1162 */ 1163 NFSLOCKNODE(np); 1164 np->n_vattr.na_size = np->n_size = vap->va_size; 1165 NFSUNLOCKNODE(np); 1166 } 1167 } else { 1168 NFSLOCKNODE(np); 1169 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && 1170 (np->n_flag & NMODIFIED) && vp->v_type == VREG) { 1171 NFSUNLOCKNODE(np); 1172 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 1173 if (error == EINTR || error == EIO) 1174 return (error); 1175 } else 1176 NFSUNLOCKNODE(np); 1177 } 1178 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 1179 if (vap->va_size != VNOVAL) { 1180 if (error == 0) { 1181 nanouptime(&ts); 1182 NFSLOCKNODE(np); 1183 np->n_localmodtime = ts; 1184 NFSUNLOCKNODE(np); 1185 } else { 1186 NFSLOCKNODE(np); 1187 np->n_size = np->n_vattr.na_size = tsize; 1188 vnode_pager_setsize(vp, tsize); 1189 NFSUNLOCKNODE(np); 1190 } 1191 } 1192 if (vap->va_mtime.tv_sec != VNOVAL && error == 0) 1193 nfscl_delegmodtime(vp, &vap->va_mtime); 1194 return (error); 1195 } 1196 1197 /* 1198 * Do an nfs setattr rpc. 1199 */ 1200 static int 1201 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, 1202 struct thread *td) 1203 { 1204 struct nfsnode *np = VTONFS(vp); 1205 int error, ret, attrflag, i; 1206 struct nfsvattr nfsva; 1207 1208 if (NFS_ISV34(vp)) { 1209 NFSLOCKNODE(np); 1210 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 1211 np->n_accesscache[i].stamp = 0; 1212 np->n_flag |= NDELEGMOD; 1213 NFSUNLOCKNODE(np); 1214 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp); 1215 } 1216 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag); 1217 if (attrflag) { 1218 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1219 if (ret && !error) 1220 error = ret; 1221 } 1222 if (error && NFS_ISV4(vp)) 1223 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid); 1224 return (error); 1225 } 1226 1227 /* 1228 * Get a named attribute directory for the vnode. 1229 */ 1230 static int 1231 nfs_get_namedattrdir(struct vnode *vp, struct componentname *cnp, 1232 struct vnode **vpp) 1233 { 1234 struct nfsfh *nfhp; 1235 struct nfsnode *np; 1236 struct vnode *newvp; 1237 struct nfsvattr nfsva; 1238 int attrflag, error; 1239 1240 attrflag = 0; 1241 *vpp = NULL; 1242 np = VTONFS(vp); 1243 error = nfsrpc_openattr(VFSTONFS(vp->v_mount), vp, np->n_fhp->nfh_fh, 1244 np->n_fhp->nfh_len, (cnp->cn_flags & CREATENAMED), 1245 cnp->cn_cred, curthread, &nfsva, &nfhp, &attrflag); 1246 if (error == NFSERR_NOTSUPP) 1247 error = ENOATTR; 1248 if (error == 0) 1249 error = nfscl_nget(vp->v_mount, vp, nfhp, cnp, curthread, &np, 1250 cnp->cn_lkflags); 1251 if (error != 0) 1252 return (error); 1253 newvp = NFSTOV(np); 1254 vn_irflag_set_cond(newvp, VIRF_NAMEDDIR); 1255 if (attrflag != 0) 1256 (void)nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1257 *vpp = newvp; 1258 return (0); 1259 } 1260 1261 /* 1262 * nfs lookup call, one step at a time... 1263 * First look in cache 1264 * If not found, unlock the directory nfsnode and do the rpc 1265 */ 1266 static int 1267 nfs_lookup(struct vop_lookup_args *ap) 1268 { 1269 struct componentname *cnp = ap->a_cnp; 1270 struct vnode *dvp = ap->a_dvp; 1271 struct vnode **vpp = ap->a_vpp; 1272 struct mount *mp = dvp->v_mount; 1273 uint64_t flags = cnp->cn_flags; 1274 struct vnode *newvp; 1275 struct nfsmount *nmp; 1276 struct nfsnode *np, *newnp; 1277 int error = 0, attrflag, dattrflag, ltype, ncticks; 1278 struct thread *td = curthread; 1279 struct nfsfh *nfhp; 1280 struct nfsvattr dnfsva, nfsva; 1281 struct vattr vattr; 1282 struct timespec nctime, ts; 1283 uint32_t openmode; 1284 bool is_nameddir, needs_nameddir, opennamed; 1285 1286 dattrflag = 0; 1287 *vpp = NULLVP; 1288 nmp = VFSTONFS(mp); 1289 opennamed = (flags & (OPENNAMED | ISLASTCN)) == (OPENNAMED | ISLASTCN); 1290 if (opennamed && (!NFSHASNFSV4(nmp) || !NFSHASNFSV4N(nmp))) 1291 return (ENOATTR); 1292 is_nameddir = (vn_irflag_read(dvp) & VIRF_NAMEDDIR) != 0; 1293 if ((is_nameddir && (flags & ISLASTCN) == 0 && (cnp->cn_namelen > 1 || 1294 *cnp->cn_nameptr != '.')) || 1295 (opennamed && !is_nameddir && (flags & ISDOTDOT) != 0)) 1296 return (ENOATTR); 1297 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) && 1298 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 1299 return (EROFS); 1300 np = VTONFS(dvp); 1301 1302 needs_nameddir = false; 1303 if (opennamed || is_nameddir) { 1304 cnp->cn_flags &= ~MAKEENTRY; 1305 if (!is_nameddir) 1306 needs_nameddir = true; 1307 } 1308 1309 /* 1310 * If the named attribute directory is needed, acquire it now. 1311 */ 1312 newvp = NULLVP; 1313 if (needs_nameddir) { 1314 KASSERT(np->n_v4 == NULL, ("nfs_lookup: O_NAMEDATTR when" 1315 " n_v4 not NULL")); 1316 error = nfs_get_namedattrdir(dvp, cnp, &newvp); 1317 if (error != 0) 1318 goto handle_error; 1319 if (cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.') { 1320 *vpp = newvp; 1321 return (0); 1322 } 1323 dvp = newvp; 1324 np = VTONFS(dvp); 1325 newvp = NULLVP; 1326 } else if (opennamed && cnp->cn_namelen == 1 && 1327 *cnp->cn_nameptr == '.') { 1328 VREF(dvp); 1329 *vpp = dvp; 1330 return (0); 1331 } 1332 1333 if (dvp->v_type != VDIR) 1334 return (ENOTDIR); 1335 1336 /* For NFSv4, wait until any remove is done. */ 1337 NFSLOCKNODE(np); 1338 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) { 1339 np->n_flag |= NREMOVEWANT; 1340 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0); 1341 } 1342 NFSUNLOCKNODE(np); 1343 1344 error = vn_dir_check_exec(dvp, cnp); 1345 if (error != 0) 1346 return (error); 1347 1348 if (!opennamed && !is_nameddir) { 1349 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks); 1350 if (error > 0 && error != ENOENT) 1351 return (error); 1352 if (error == -1) { 1353 /* 1354 * Lookups of "." are special and always return the 1355 * current directory. cache_lookup() already handles 1356 * associated locking bookkeeping, etc. 1357 */ 1358 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 1359 return (0); 1360 } 1361 1362 /* 1363 * We only accept a positive hit in the cache if the 1364 * change time of the file matches our cached copy. 1365 * Otherwise, we discard the cache entry and fallback 1366 * to doing a lookup RPC. We also only trust cache 1367 * entries for less than nm_nametimeo seconds. 1368 * 1369 * To better handle stale file handles and attributes, 1370 * clear the attribute cache of this node if it is a 1371 * leaf component, part of an open() call, and not 1372 * locally modified before fetching the attributes. 1373 * This should allow stale file handles to be detected 1374 * here where we can fall back to a LOOKUP RPC to 1375 * recover rather than having nfs_open() detect the 1376 * stale file handle and failing open(2) with ESTALE. 1377 */ 1378 newvp = *vpp; 1379 newnp = VTONFS(newvp); 1380 if (!(nmp->nm_flag & NFSMNT_NOCTO) && 1381 (flags & (ISLASTCN | ISOPEN)) == 1382 (ISLASTCN | ISOPEN) && 1383 !(newnp->n_flag & NMODIFIED)) { 1384 NFSLOCKNODE(newnp); 1385 newnp->n_attrstamp = 0; 1386 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1387 NFSUNLOCKNODE(newnp); 1388 } 1389 if (nfscl_nodeleg(newvp, 0) == 0 || 1390 ((u_int)(ticks - ncticks) < 1391 (nmp->nm_nametimeo * hz) && 1392 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 && 1393 timespeccmp(&vattr.va_ctime, &nctime, ==))) { 1394 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1395 return (0); 1396 } 1397 cache_purge(newvp); 1398 if (dvp != newvp) 1399 vput(newvp); 1400 else 1401 vrele(newvp); 1402 *vpp = NULLVP; 1403 } else if (error == ENOENT) { 1404 if (VN_IS_DOOMED(dvp)) 1405 return (ENOENT); 1406 /* 1407 * We only accept a negative hit in the cache if the 1408 * modification time of the parent directory matches 1409 * the cached copy in the name cache entry. 1410 * Otherwise, we discard all of the negative cache 1411 * entries for this directory. We also only trust 1412 * negative cache entries for up to nm_negnametimeo 1413 * seconds. 1414 */ 1415 if ((u_int)(ticks - ncticks) < 1416 (nmp->nm_negnametimeo * hz) && 1417 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 && 1418 timespeccmp(&vattr.va_mtime, &nctime, ==)) { 1419 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1420 return (ENOENT); 1421 } 1422 cache_purge_negative(dvp); 1423 } 1424 } 1425 1426 openmode = 0; 1427 #if 0 1428 /* 1429 * The use of LookupOpen breaks some builds. It is disabled 1430 * until that is fixed. 1431 */ 1432 /* 1433 * If this an NFSv4.1/4.2 mount using the "oneopenown" mount 1434 * option, it is possible to do the Open operation in the same 1435 * compound as Lookup, so long as delegations are not being 1436 * issued. This saves doing a separate RPC for Open. 1437 * For pnfs, do not do this, since the Open+LayoutGet will 1438 * be needed as a separate RPC. 1439 */ 1440 NFSLOCKMNT(nmp); 1441 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && !NFSHASPNFS(nmp) && 1442 (nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 && 1443 (!NFSMNT_RDONLY(mp) || (flags & OPENWRITE) == 0) && 1444 (flags & (ISLASTCN | ISOPEN | OPENNAMED))) == (ISLASTCN | ISOPEN)) { 1445 if ((flags & OPENREAD) != 0) 1446 openmode |= NFSV4OPEN_ACCESSREAD; 1447 if ((flags & OPENWRITE) != 0) 1448 openmode |= NFSV4OPEN_ACCESSWRITE; 1449 } 1450 NFSUNLOCKMNT(nmp); 1451 #endif 1452 1453 newvp = NULLVP; 1454 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses); 1455 nanouptime(&ts); 1456 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1457 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1458 openmode); 1459 if (dattrflag) 1460 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1461 if (needs_nameddir) { 1462 vput(dvp); 1463 dvp = ap->a_dvp; 1464 } 1465 handle_error: 1466 if (error) { 1467 if (newvp != NULLVP) { 1468 vput(newvp); 1469 *vpp = NULLVP; 1470 } 1471 1472 if (error != ENOENT) { 1473 if (NFS_ISV4(dvp)) 1474 error = nfscl_maperr(td, error, 1475 (uid_t)0, (gid_t)0); 1476 return (error); 1477 } 1478 1479 /* The requested file was not found. */ 1480 if ((cnp->cn_nameiop == CREATE || 1481 cnp->cn_nameiop == RENAME) && 1482 (flags & ISLASTCN)) { 1483 /* 1484 * XXX: UFS does a full VOP_ACCESS(dvp, 1485 * VWRITE) here instead of just checking 1486 * MNT_RDONLY. 1487 */ 1488 if (mp->mnt_flag & MNT_RDONLY) 1489 return (EROFS); 1490 return (EJUSTRETURN); 1491 } 1492 1493 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) { 1494 /* 1495 * Cache the modification time of the parent 1496 * directory from the post-op attributes in 1497 * the name cache entry. The negative cache 1498 * entry will be ignored once the directory 1499 * has changed. Don't bother adding the entry 1500 * if the directory has already changed. 1501 */ 1502 NFSLOCKNODE(np); 1503 if (timespeccmp(&np->n_vattr.na_mtime, 1504 &dnfsva.na_mtime, ==)) { 1505 NFSUNLOCKNODE(np); 1506 cache_enter_time(dvp, NULL, cnp, 1507 &dnfsva.na_mtime, NULL); 1508 } else 1509 NFSUNLOCKNODE(np); 1510 } 1511 return (ENOENT); 1512 } 1513 1514 /* 1515 * Handle RENAME case... 1516 */ 1517 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 1518 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1519 free(nfhp, M_NFSFH); 1520 return (EISDIR); 1521 } 1522 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1523 LK_EXCLUSIVE); 1524 if (error) 1525 return (error); 1526 newvp = NFSTOV(np); 1527 /* 1528 * If n_localmodtime >= time before RPC, then 1529 * a file modification operation, such as 1530 * VOP_SETATTR() of size, has occurred while 1531 * the Lookup RPC and acquisition of the vnode 1532 * happened. As such, the attributes might 1533 * be stale, with possibly an incorrect size. 1534 */ 1535 NFSLOCKNODE(np); 1536 if (timespecisset(&np->n_localmodtime) && 1537 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1538 NFSCL_DEBUG(4, "nfs_lookup: rename localmod " 1539 "stale attributes\n"); 1540 attrflag = 0; 1541 } 1542 NFSUNLOCKNODE(np); 1543 if (attrflag) 1544 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1545 0, 1); 1546 *vpp = newvp; 1547 return (0); 1548 } 1549 1550 if (flags & ISDOTDOT) { 1551 ltype = NFSVOPISLOCKED(dvp); 1552 error = vfs_busy(mp, MBF_NOWAIT); 1553 if (error != 0) { 1554 vfs_ref(mp); 1555 NFSVOPUNLOCK(dvp); 1556 error = vfs_busy(mp, 0); 1557 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1558 vfs_rel(mp); 1559 if (error == 0 && VN_IS_DOOMED(dvp)) { 1560 vfs_unbusy(mp); 1561 error = ENOENT; 1562 } 1563 if (error != 0) 1564 return (error); 1565 } 1566 NFSVOPUNLOCK(dvp); 1567 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1568 cnp->cn_lkflags); 1569 if (error == 0) 1570 newvp = NFSTOV(np); 1571 vfs_unbusy(mp); 1572 if (newvp != dvp) 1573 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1574 if (VN_IS_DOOMED(dvp)) { 1575 if (error == 0) { 1576 if (newvp == dvp) 1577 vrele(newvp); 1578 else 1579 vput(newvp); 1580 } 1581 error = ENOENT; 1582 } 1583 if (error != 0) 1584 return (error); 1585 if (attrflag) 1586 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1587 0, 1); 1588 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1589 free(nfhp, M_NFSFH); 1590 VREF(dvp); 1591 newvp = dvp; 1592 if (attrflag) 1593 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1594 0, 1); 1595 } else { 1596 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1597 cnp->cn_lkflags); 1598 if (error) 1599 return (error); 1600 newvp = NFSTOV(np); 1601 if (opennamed) 1602 vn_irflag_set_cond(newvp, VIRF_NAMEDATTR); 1603 /* 1604 * If n_localmodtime >= time before RPC, then 1605 * a file modification operation, such as 1606 * VOP_SETATTR() of size, has occurred while 1607 * the Lookup RPC and acquisition of the vnode 1608 * happened. As such, the attributes might 1609 * be stale, with possibly an incorrect size. 1610 */ 1611 NFSLOCKNODE(np); 1612 if (timespecisset(&np->n_localmodtime) && 1613 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1614 NFSCL_DEBUG(4, "nfs_lookup: localmod " 1615 "stale attributes\n"); 1616 attrflag = 0; 1617 } 1618 NFSUNLOCKNODE(np); 1619 if (attrflag) 1620 (void)nfscl_loadattrcache(&newvp, &nfsva, NULL, 1621 0, 1); 1622 else if ((flags & (ISLASTCN | ISOPEN)) == 1623 (ISLASTCN | ISOPEN) && 1624 !(np->n_flag & NMODIFIED)) { 1625 /* 1626 * Flush the attribute cache when opening a 1627 * leaf node to ensure that fresh attributes 1628 * are fetched in nfs_open() since we did not 1629 * fetch attributes from the LOOKUP reply. 1630 */ 1631 NFSLOCKNODE(np); 1632 np->n_attrstamp = 0; 1633 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1634 NFSUNLOCKNODE(np); 1635 } 1636 } 1637 if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp && 1638 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) && 1639 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0)) 1640 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 1641 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime); 1642 *vpp = newvp; 1643 return (0); 1644 } 1645 1646 /* 1647 * nfs read call. 1648 * Just call ncl_bioread() to do the work. 1649 */ 1650 static int 1651 nfs_read(struct vop_read_args *ap) 1652 { 1653 struct vnode *vp = ap->a_vp; 1654 1655 switch (vp->v_type) { 1656 case VREG: 1657 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 1658 case VDIR: 1659 return (EISDIR); 1660 default: 1661 return (EOPNOTSUPP); 1662 } 1663 } 1664 1665 /* 1666 * nfs readlink call 1667 */ 1668 static int 1669 nfs_readlink(struct vop_readlink_args *ap) 1670 { 1671 struct vnode *vp = ap->a_vp; 1672 1673 if (vp->v_type != VLNK) 1674 return (EINVAL); 1675 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred)); 1676 } 1677 1678 /* 1679 * Do a readlink rpc. 1680 * Called by ncl_doio() from below the buffer cache. 1681 */ 1682 int 1683 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1684 { 1685 int error, ret, attrflag; 1686 struct nfsvattr nfsva; 1687 1688 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva, 1689 &attrflag); 1690 if (attrflag) { 1691 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1692 if (ret && !error) 1693 error = ret; 1694 } 1695 if (error && NFS_ISV4(vp)) 1696 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1697 return (error); 1698 } 1699 1700 /* 1701 * nfs read rpc call 1702 * Ditto above 1703 */ 1704 int 1705 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1706 { 1707 int error, ret, attrflag; 1708 struct nfsvattr nfsva; 1709 struct nfsmount *nmp; 1710 1711 nmp = VFSTONFS(vp->v_mount); 1712 error = EIO; 1713 attrflag = 0; 1714 if (NFSHASPNFS(nmp)) 1715 error = nfscl_doiods(vp, uiop, NULL, NULL, 1716 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td); 1717 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error); 1718 if (error != 0 && error != EFAULT) 1719 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, 1720 &attrflag); 1721 if (attrflag) { 1722 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1723 if (ret && !error) 1724 error = ret; 1725 } 1726 if (error && NFS_ISV4(vp)) 1727 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1728 return (error); 1729 } 1730 1731 /* 1732 * nfs write call 1733 */ 1734 int 1735 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 1736 int *iomode, int *must_commit, int called_from_strategy, int ioflag) 1737 { 1738 struct nfsvattr nfsva; 1739 int error, attrflag, ret; 1740 struct nfsmount *nmp; 1741 1742 nmp = VFSTONFS(vp->v_mount); 1743 error = EIO; 1744 attrflag = 0; 1745 if (NFSHASPNFS(nmp)) 1746 error = nfscl_doiods(vp, uiop, iomode, must_commit, 1747 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td); 1748 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error); 1749 if (error != 0 && error != EFAULT) 1750 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred, 1751 uiop->uio_td, &nfsva, &attrflag, called_from_strategy, 1752 ioflag); 1753 if (attrflag) { 1754 if (VTONFS(vp)->n_flag & ND_NFSV4) 1755 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 1, 1); 1756 else 1757 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1758 if (ret && !error) 1759 error = ret; 1760 } 1761 if (DOINGASYNC(vp)) 1762 *iomode = NFSWRITE_FILESYNC; 1763 if (error && NFS_ISV4(vp)) 1764 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1765 return (error); 1766 } 1767 1768 /* 1769 * nfs mknod rpc 1770 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1771 * mode set to specify the file type and the size field for rdev. 1772 */ 1773 static int 1774 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1775 struct vattr *vap) 1776 { 1777 struct nfsvattr nfsva, dnfsva; 1778 struct vnode *newvp = NULL; 1779 struct nfsnode *np = NULL, *dnp; 1780 struct nfsfh *nfhp; 1781 struct vattr vattr; 1782 int error = 0, attrflag, dattrflag; 1783 u_int32_t rdev; 1784 1785 if (vap->va_type == VCHR || vap->va_type == VBLK) 1786 rdev = vap->va_rdev; 1787 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1788 rdev = 0xffffffff; 1789 else 1790 return (EOPNOTSUPP); 1791 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1792 return (error); 1793 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap, 1794 rdev, vap->va_type, cnp->cn_cred, curthread, &dnfsva, 1795 &nfsva, &nfhp, &attrflag, &dattrflag); 1796 if (!error) { 1797 if (!nfhp) 1798 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1799 cnp->cn_namelen, cnp->cn_cred, curthread, 1800 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1801 if (nfhp) 1802 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1803 curthread, &np, LK_EXCLUSIVE); 1804 } 1805 if (dattrflag) 1806 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1807 if (!error) { 1808 newvp = NFSTOV(np); 1809 if (attrflag != 0) { 1810 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1811 if (error != 0) 1812 vput(newvp); 1813 } 1814 } 1815 if (!error) { 1816 *vpp = newvp; 1817 } else if (NFS_ISV4(dvp)) { 1818 error = nfscl_maperr(curthread, error, vap->va_uid, 1819 vap->va_gid); 1820 } 1821 dnp = VTONFS(dvp); 1822 NFSLOCKNODE(dnp); 1823 dnp->n_flag |= NMODIFIED; 1824 if (!dattrflag) { 1825 dnp->n_attrstamp = 0; 1826 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1827 } 1828 NFSUNLOCKNODE(dnp); 1829 return (error); 1830 } 1831 1832 /* 1833 * nfs mknod vop 1834 * just call nfs_mknodrpc() to do the work. 1835 */ 1836 /* ARGSUSED */ 1837 static int 1838 nfs_mknod(struct vop_mknod_args *ap) 1839 { 1840 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap)); 1841 } 1842 1843 static struct mtx nfs_cverf_mtx; 1844 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex", 1845 MTX_DEF); 1846 1847 static nfsquad_t 1848 nfs_get_cverf(void) 1849 { 1850 static nfsquad_t cverf; 1851 nfsquad_t ret; 1852 static int cverf_initialized = 0; 1853 1854 mtx_lock(&nfs_cverf_mtx); 1855 if (cverf_initialized == 0) { 1856 cverf.lval[0] = arc4random(); 1857 cverf.lval[1] = arc4random(); 1858 cverf_initialized = 1; 1859 } else 1860 cverf.qval++; 1861 ret = cverf; 1862 mtx_unlock(&nfs_cverf_mtx); 1863 1864 return (ret); 1865 } 1866 1867 /* 1868 * nfs file create call 1869 */ 1870 static int 1871 nfs_create(struct vop_create_args *ap) 1872 { 1873 struct vnode *dvp = ap->a_dvp; 1874 struct vattr *vap = ap->a_vap; 1875 struct componentname *cnp = ap->a_cnp; 1876 struct nfsnode *np = NULL, *dnp; 1877 struct vnode *newvp = NULL; 1878 struct nfsmount *nmp; 1879 struct nfsvattr dnfsva, nfsva; 1880 struct nfsfh *nfhp; 1881 nfsquad_t cverf; 1882 int error = 0, attrflag, dattrflag, fmode = 0; 1883 struct vattr vattr; 1884 bool is_nameddir, needs_nameddir, opennamed; 1885 1886 /* 1887 * Oops, not for me.. 1888 */ 1889 if (vap->va_type == VSOCK) 1890 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1891 1892 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1893 return (error); 1894 if (vap->va_vaflags & VA_EXCLUSIVE) 1895 fmode |= O_EXCL; 1896 dnp = VTONFS(dvp); 1897 nmp = VFSTONFS(dvp->v_mount); 1898 needs_nameddir = false; 1899 if (NFSHASNFSV4(nmp) && NFSHASNFSV4N(nmp)) { 1900 opennamed = (cnp->cn_flags & (OPENNAMED | ISLASTCN)) == 1901 (OPENNAMED | ISLASTCN); 1902 is_nameddir = (vn_irflag_read(dvp) & VIRF_NAMEDDIR) != 0; 1903 if (opennamed || is_nameddir) { 1904 cnp->cn_flags &= ~MAKEENTRY; 1905 if (!is_nameddir) 1906 needs_nameddir = true; 1907 } 1908 } 1909 1910 /* 1911 * If the named attribute directory is needed, acquire it now. 1912 */ 1913 if (needs_nameddir) { 1914 KASSERT(dnp->n_v4 == NULL, ("nfs_create: O_NAMEDATTR when" 1915 " n_v4 not NULL")); 1916 error = nfs_get_namedattrdir(dvp, cnp, &newvp); 1917 if (error != 0) 1918 return (error); 1919 dvp = newvp; 1920 dnp = VTONFS(dvp); 1921 newvp = NULL; 1922 } 1923 1924 again: 1925 /* For NFSv4, wait until any remove is done. */ 1926 NFSLOCKNODE(dnp); 1927 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) { 1928 dnp->n_flag |= NREMOVEWANT; 1929 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0); 1930 } 1931 NFSUNLOCKNODE(dnp); 1932 1933 cverf = nfs_get_cverf(); 1934 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1935 vap, cverf, fmode, cnp->cn_cred, curthread, &dnfsva, &nfsva, 1936 &nfhp, &attrflag, &dattrflag); 1937 if (!error) { 1938 if (nfhp == NULL) 1939 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1940 cnp->cn_namelen, cnp->cn_cred, curthread, 1941 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1942 if (nfhp != NULL) 1943 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1944 curthread, &np, LK_EXCLUSIVE); 1945 } 1946 if (dattrflag) 1947 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1948 if (!error) { 1949 newvp = NFSTOV(np); 1950 if (attrflag == 0) 1951 error = nfsrpc_getattr(newvp, cnp->cn_cred, curthread, 1952 &nfsva); 1953 if (error == 0) 1954 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1955 } 1956 if (error) { 1957 if (newvp != NULL) { 1958 vput(newvp); 1959 newvp = NULL; 1960 } 1961 if (NFS_ISV34(dvp) && (fmode & O_EXCL) && 1962 error == NFSERR_NOTSUPP) { 1963 fmode &= ~O_EXCL; 1964 goto again; 1965 } 1966 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) { 1967 if (nfscl_checksattr(vap, &nfsva)) { 1968 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred, 1969 curthread, &nfsva, &attrflag); 1970 if (error && (vap->va_uid != (uid_t)VNOVAL || 1971 vap->va_gid != (gid_t)VNOVAL)) { 1972 /* try again without setting uid/gid */ 1973 vap->va_uid = (uid_t)VNOVAL; 1974 vap->va_gid = (uid_t)VNOVAL; 1975 error = nfsrpc_setattr(newvp, vap, NULL, 1976 cnp->cn_cred, curthread, &nfsva, &attrflag); 1977 } 1978 if (attrflag) 1979 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1980 0, 1); 1981 if (error != 0) 1982 vput(newvp); 1983 } 1984 } 1985 if (!error) { 1986 if ((cnp->cn_flags & MAKEENTRY) && attrflag) { 1987 if (dvp != newvp) 1988 cache_enter_time(dvp, newvp, cnp, 1989 &nfsva.na_ctime, NULL); 1990 else 1991 printf("nfs_create: bogus NFS server returned " 1992 "the directory as the new file object\n"); 1993 } 1994 *ap->a_vpp = newvp; 1995 } else if (NFS_ISV4(dvp)) { 1996 error = nfscl_maperr(curthread, error, vap->va_uid, 1997 vap->va_gid); 1998 } 1999 NFSLOCKNODE(dnp); 2000 dnp->n_flag |= NMODIFIED; 2001 if (!dattrflag) { 2002 dnp->n_attrstamp = 0; 2003 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2004 } 2005 NFSUNLOCKNODE(dnp); 2006 if (needs_nameddir) 2007 vput(dvp); 2008 return (error); 2009 } 2010 2011 /* 2012 * nfs file remove call 2013 * To try and make nfs semantics closer to ufs semantics, a file that has 2014 * other processes using the vnode is renamed instead of removed and then 2015 * removed later on the last close. 2016 * - If v_usecount > 1 2017 * If a rename is not already in the works 2018 * call nfs_sillyrename() to set it up 2019 * else 2020 * do the remove rpc 2021 */ 2022 static int 2023 nfs_remove(struct vop_remove_args *ap) 2024 { 2025 struct vnode *vp = ap->a_vp; 2026 struct vnode *dvp = ap->a_dvp; 2027 struct componentname *cnp = ap->a_cnp; 2028 struct nfsnode *np = VTONFS(vp); 2029 int error = 0; 2030 struct vattr vattr; 2031 struct nfsmount *nmp; 2032 2033 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount")); 2034 if (vp->v_type == VDIR) 2035 error = EPERM; 2036 else if (vrefcnt(vp) == 1 || (np->n_sillyrename && 2037 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && 2038 vattr.va_nlink > 1)) { 2039 nmp = VFSTONFS(vp->v_mount); 2040 /* 2041 * Purge the name cache so that the chance of a lookup for 2042 * the name succeeding while the remove is in progress is 2043 * minimized. Without node locking it can still happen, such 2044 * that an I/O op returns ESTALE, but since you get this if 2045 * another host removes the file.. 2046 */ 2047 cache_purge(vp); 2048 /* 2049 * throw away biocache buffers, mainly to avoid 2050 * unnecessary delayed writes later. 2051 * Flushing here would be more correct for the case 2052 * where nfs_close() did not do a flush. However, it 2053 * could be a large performance hit for some servers 2054 * and only matters when the file name being removed is 2055 * one of multiple hard links. 2056 */ 2057 if (!NFSHASNFSV4(nmp) || !NFSHASNFSV4N(nmp) || 2058 (nmp->nm_flag & NFSMNT_NOCTO) == 0) 2059 error = ncl_vinvalbuf(vp, 0, curthread, 1); 2060 if (error != EINTR && error != EIO) 2061 /* Do the rpc */ 2062 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr, 2063 cnp->cn_namelen, cnp->cn_cred, curthread, false); 2064 /* 2065 * Kludge City: If the first reply to the remove rpc is lost.. 2066 * the reply to the retransmitted request will be ENOENT 2067 * since the file was in fact removed 2068 * Therefore, we cheat and return success. 2069 */ 2070 if (error == ENOENT) 2071 error = 0; 2072 } else if (!np->n_sillyrename) 2073 error = nfs_sillyrename(dvp, vp, cnp); 2074 NFSLOCKNODE(np); 2075 np->n_attrstamp = 0; 2076 NFSUNLOCKNODE(np); 2077 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 2078 return (error); 2079 } 2080 2081 /* 2082 * nfs file remove rpc called from nfs_inactive 2083 */ 2084 int 2085 ncl_removeit(struct sillyrename *sp, struct vnode *vp) 2086 { 2087 /* 2088 * Make sure that the directory vnode is still valid. 2089 * XXX we should lock sp->s_dvp here. 2090 */ 2091 if (sp->s_dvp->v_type == VBAD) 2092 return (0); 2093 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen, 2094 sp->s_cred, NULL, true)); 2095 } 2096 2097 /* 2098 * Handle the nfsremove_status reply from the RPC function. 2099 */ 2100 static void 2101 nfs_removestatus(struct vnode *vp, nfsremove_status file_status, 2102 bool silly, struct thread *td) 2103 { 2104 2105 switch (file_status) { 2106 case NLINK_ZERO: 2107 /* Get rid of any delegation. */ 2108 nfscl_delegreturnvp(vp, false, td); 2109 /* FALLTHROUGH */ 2110 case DELETED: 2111 /* Throw away buffer cache blocks. */ 2112 (void)ncl_vinvalbuf(vp, 0, td, 1); 2113 break; 2114 case VALID: 2115 /* Nothing to do, delegation is still ok. */ 2116 break; 2117 default: 2118 break; 2119 } 2120 } 2121 2122 /* 2123 * Nfs remove rpc, called from nfs_remove() and ncl_removeit(). 2124 */ 2125 static int 2126 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 2127 int namelen, struct ucred *cred, struct thread *td, bool silly) 2128 { 2129 struct nfsvattr dnfsva, nfsva; 2130 struct nfsnode *dnp = VTONFS(dvp); 2131 struct nfsmount *nmp; 2132 int attrflag, error = 0, dattrflag; 2133 nfsremove_status file_status; 2134 2135 nmp = VFSTONFS(dvp->v_mount); 2136 NFSLOCKNODE(dnp); 2137 dnp->n_flag |= NREMOVEINPROG; 2138 NFSUNLOCKNODE(dnp); 2139 error = nfsrpc_remove(dvp, name, namelen, vp, &nfsva, &attrflag, 2140 &file_status, &dnfsva, &dattrflag, cred, td); 2141 NFSLOCKNODE(dnp); 2142 if ((dnp->n_flag & NREMOVEWANT)) { 2143 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG); 2144 NFSUNLOCKNODE(dnp); 2145 wakeup((caddr_t)dnp); 2146 } else { 2147 dnp->n_flag &= ~NREMOVEINPROG; 2148 NFSUNLOCKNODE(dnp); 2149 } 2150 2151 if (NFSHASNFSV4(nmp) && NFSHASNFSV4N(nmp)) { 2152 if (file_status != DELETED && attrflag != 0) 2153 (void)nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2154 if ((nmp->nm_flag & NFSMNT_NOCTO) != 0) 2155 nfs_removestatus(vp, file_status, silly, td); 2156 } 2157 2158 if (dattrflag != 0) 2159 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2160 NFSLOCKNODE(dnp); 2161 dnp->n_flag |= NMODIFIED; 2162 if (dattrflag == 0) { 2163 dnp->n_attrstamp = 0; 2164 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2165 } 2166 NFSUNLOCKNODE(dnp); 2167 if (error && NFS_ISV4(dvp)) 2168 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2169 return (error); 2170 } 2171 2172 /* 2173 * nfs file rename call 2174 */ 2175 static int 2176 nfs_rename(struct vop_rename_args *ap) 2177 { 2178 struct vnode *fvp = ap->a_fvp; 2179 struct vnode *tvp = ap->a_tvp; 2180 struct vnode *fdvp = ap->a_fdvp; 2181 struct vnode *tdvp = ap->a_tdvp; 2182 struct componentname *tcnp = ap->a_tcnp; 2183 struct componentname *fcnp = ap->a_fcnp; 2184 struct nfsnode *fnp = VTONFS(ap->a_fvp); 2185 struct nfsnode *tdnp = VTONFS(ap->a_tdvp); 2186 struct nfsv4node *newv4 = NULL; 2187 struct nfsmount *nmp; 2188 int error; 2189 2190 /* Check for cross-device rename */ 2191 if ((fvp->v_mount != tdvp->v_mount) || 2192 (tvp && (fvp->v_mount != tvp->v_mount))) { 2193 error = EXDEV; 2194 goto out; 2195 } 2196 nmp = VFSTONFS(fvp->v_mount); 2197 2198 if (fvp == tvp) { 2199 printf("nfs_rename: fvp == tvp (can't happen)\n"); 2200 error = 0; 2201 goto out; 2202 } 2203 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0) 2204 goto out; 2205 2206 /* 2207 * We have to flush B_DELWRI data prior to renaming 2208 * the file. If we don't, the delayed-write buffers 2209 * can be flushed out later after the file has gone stale 2210 * under NFSV3. NFSV2 does not have this problem because 2211 * ( as far as I can tell ) it flushes dirty buffers more 2212 * often. 2213 * 2214 * Skip the rename operation if the fsync fails, this can happen 2215 * due to the server's volume being full, when we pushed out data 2216 * that was written back to our cache earlier. Not checking for 2217 * this condition can result in potential (silent) data loss. 2218 */ 2219 if ((nmp->nm_flag & NFSMNT_NOCTO) == 0 || !NFSHASNFSV4(nmp) || 2220 !NFSHASNFSV4N(nmp) || nfscl_mustflush(fvp) != 0) 2221 error = VOP_FSYNC(fvp, MNT_WAIT, curthread); 2222 NFSVOPUNLOCK(fvp); 2223 if (error == 0 && tvp != NULL && ((nmp->nm_flag & NFSMNT_NOCTO) == 0 || 2224 !NFSHASNFSV4(nmp) || !NFSHASNFSV4N(nmp) || 2225 nfscl_mustflush(tvp) != 0)) 2226 error = VOP_FSYNC(tvp, MNT_WAIT, curthread); 2227 if (error != 0) 2228 goto out; 2229 2230 /* 2231 * If the tvp exists and is in use, sillyrename it before doing the 2232 * rename of the new file over it. 2233 * XXX Can't sillyrename a directory. 2234 */ 2235 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && 2236 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 2237 vput(tvp); 2238 tvp = NULL; 2239 } 2240 2241 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2242 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, false, tcnp->cn_cred, 2243 curthread); 2244 2245 if (error == 0 && NFS_ISV4(tdvp)) { 2246 /* 2247 * For NFSv4, check to see if it is the same name and 2248 * replace the name, if it is different. 2249 */ 2250 newv4 = malloc( 2251 sizeof (struct nfsv4node) + 2252 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1, 2253 M_NFSV4NODE, M_WAITOK); 2254 NFSLOCKNODE(tdnp); 2255 NFSLOCKNODE(fnp); 2256 if (fnp->n_v4 != NULL && fvp->v_type == VREG && 2257 (fnp->n_v4->n4_namelen != tcnp->cn_namelen || 2258 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4), 2259 tcnp->cn_namelen) || 2260 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen || 2261 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2262 tdnp->n_fhp->nfh_len))) { 2263 free(fnp->n_v4, M_NFSV4NODE); 2264 fnp->n_v4 = newv4; 2265 newv4 = NULL; 2266 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len; 2267 fnp->n_v4->n4_namelen = tcnp->cn_namelen; 2268 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2269 tdnp->n_fhp->nfh_len); 2270 NFSBCOPY(tcnp->cn_nameptr, 2271 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen); 2272 } 2273 NFSUNLOCKNODE(tdnp); 2274 NFSUNLOCKNODE(fnp); 2275 if (newv4 != NULL) 2276 free(newv4, M_NFSV4NODE); 2277 } 2278 2279 if (fvp->v_type == VDIR) { 2280 if (tvp != NULL && tvp->v_type == VDIR) 2281 cache_purge(tdvp); 2282 cache_purge(fdvp); 2283 } 2284 2285 out: 2286 if (tdvp == tvp) 2287 vrele(tdvp); 2288 else 2289 vput(tdvp); 2290 if (tvp) 2291 vput(tvp); 2292 vrele(fdvp); 2293 vrele(fvp); 2294 /* 2295 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2296 */ 2297 if (error == ENOENT) 2298 error = 0; 2299 return (error); 2300 } 2301 2302 /* 2303 * nfs file rename rpc called from nfs_remove() above 2304 */ 2305 static int 2306 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp, 2307 struct sillyrename *sp) 2308 { 2309 2310 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen, 2311 sdvp, NULL, sp->s_name, sp->s_namlen, true, scnp->cn_cred, 2312 curthread)); 2313 } 2314 2315 /* 2316 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2317 */ 2318 static int 2319 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr, 2320 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr, 2321 int tnamelen, bool silly, struct ucred *cred, struct thread *td) 2322 { 2323 struct nfsvattr fnfsva, tnfsva, tvpnfsva; 2324 struct nfsnode *fdnp = VTONFS(fdvp); 2325 struct nfsnode *tdnp = VTONFS(tdvp); 2326 struct nfsmount *nmp; 2327 int error = 0, fattrflag, tattrflag, tvpattrflag; 2328 nfsremove_status tvp_status; 2329 2330 nmp = VFSTONFS(fdvp->v_mount); 2331 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp, 2332 tnameptr, tnamelen, &tvp_status, &fnfsva, &tnfsva, &fattrflag, 2333 &tattrflag, &tvpnfsva, &tvpattrflag, cred, td); 2334 NFSLOCKNODE(fdnp); 2335 fdnp->n_flag |= NMODIFIED; 2336 if (fattrflag != 0) { 2337 NFSUNLOCKNODE(fdnp); 2338 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, 0, 1); 2339 } else { 2340 fdnp->n_attrstamp = 0; 2341 NFSUNLOCKNODE(fdnp); 2342 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp); 2343 } 2344 NFSLOCKNODE(tdnp); 2345 tdnp->n_flag |= NMODIFIED; 2346 if (tattrflag != 0) { 2347 NFSUNLOCKNODE(tdnp); 2348 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, 0, 1); 2349 } else { 2350 tdnp->n_attrstamp = 0; 2351 NFSUNLOCKNODE(tdnp); 2352 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2353 } 2354 2355 if (tvp != NULL) { 2356 if (NFSHASNFSV4(nmp) && NFSHASNFSV4N(nmp) && 2357 (nmp->nm_flag & NFSMNT_NOCTO) != 0) 2358 nfs_removestatus(tvp, tvp_status, silly, td); 2359 if (!silly && tvpattrflag != 0) 2360 (void)nfscl_loadattrcache(&tvp, &tvpnfsva, NULL, 0, 1); 2361 } 2362 2363 if (error && NFS_ISV4(fdvp)) 2364 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2365 return (error); 2366 } 2367 2368 /* 2369 * nfs hard link create call 2370 */ 2371 static int 2372 nfs_link(struct vop_link_args *ap) 2373 { 2374 struct vnode *vp = ap->a_vp; 2375 struct vnode *tdvp = ap->a_tdvp; 2376 struct componentname *cnp = ap->a_cnp; 2377 struct nfsnode *np, *tdnp; 2378 struct nfsvattr nfsva, dnfsva; 2379 int error = 0, attrflag, dattrflag; 2380 2381 /* 2382 * Push all writes to the server, so that the attribute cache 2383 * doesn't get "out of sync" with the server. 2384 * XXX There should be a better way! 2385 */ 2386 #ifdef notnow 2387 VOP_FSYNC(vp, MNT_WAIT, curthread); 2388 #endif 2389 2390 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2391 cnp->cn_cred, curthread, &dnfsva, &nfsva, &attrflag, &dattrflag); 2392 tdnp = VTONFS(tdvp); 2393 NFSLOCKNODE(tdnp); 2394 tdnp->n_flag |= NMODIFIED; 2395 if (dattrflag != 0) { 2396 NFSUNLOCKNODE(tdnp); 2397 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, 0, 1); 2398 } else { 2399 tdnp->n_attrstamp = 0; 2400 NFSUNLOCKNODE(tdnp); 2401 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2402 } 2403 if (attrflag) 2404 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2405 else { 2406 np = VTONFS(vp); 2407 NFSLOCKNODE(np); 2408 np->n_attrstamp = 0; 2409 NFSUNLOCKNODE(np); 2410 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 2411 } 2412 /* 2413 * If negative lookup caching is enabled, I might as well 2414 * add an entry for this node. Not necessary for correctness, 2415 * but if negative caching is enabled, then the system 2416 * must care about lookup caching hit rate, so... 2417 */ 2418 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 && 2419 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2420 if (tdvp != vp) 2421 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL); 2422 else 2423 printf("nfs_link: bogus NFS server returned " 2424 "the directory as the new link\n"); 2425 } 2426 if (error && NFS_ISV4(vp)) 2427 error = nfscl_maperr(curthread, error, (uid_t)0, 2428 (gid_t)0); 2429 return (error); 2430 } 2431 2432 /* 2433 * nfs symbolic link create call 2434 */ 2435 static int 2436 nfs_symlink(struct vop_symlink_args *ap) 2437 { 2438 struct vnode *dvp = ap->a_dvp; 2439 struct vattr *vap = ap->a_vap; 2440 struct componentname *cnp = ap->a_cnp; 2441 struct nfsvattr nfsva, dnfsva; 2442 struct nfsfh *nfhp; 2443 struct nfsnode *np = NULL, *dnp; 2444 struct vnode *newvp = NULL; 2445 int error = 0, attrflag, dattrflag, ret; 2446 2447 vap->va_type = VLNK; 2448 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2449 ap->a_target, vap, cnp->cn_cred, curthread, &dnfsva, 2450 &nfsva, &nfhp, &attrflag, &dattrflag); 2451 if (nfhp) { 2452 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2453 &np, LK_EXCLUSIVE); 2454 if (!ret) 2455 newvp = NFSTOV(np); 2456 else if (!error) 2457 error = ret; 2458 } 2459 if (newvp != NULL) { 2460 if (attrflag) 2461 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 2462 } else if (!error) { 2463 /* 2464 * If we do not have an error and we could not extract the 2465 * newvp from the response due to the request being NFSv2, we 2466 * have to do a lookup in order to obtain a newvp to return. 2467 */ 2468 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2469 cnp->cn_cred, curthread, &np); 2470 if (!error) 2471 newvp = NFSTOV(np); 2472 } 2473 if (error) { 2474 if (newvp) 2475 vput(newvp); 2476 if (NFS_ISV4(dvp)) 2477 error = nfscl_maperr(curthread, error, 2478 vap->va_uid, vap->va_gid); 2479 } else { 2480 *ap->a_vpp = newvp; 2481 } 2482 2483 dnp = VTONFS(dvp); 2484 NFSLOCKNODE(dnp); 2485 dnp->n_flag |= NMODIFIED; 2486 if (dattrflag != 0) { 2487 NFSUNLOCKNODE(dnp); 2488 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2489 } else { 2490 dnp->n_attrstamp = 0; 2491 NFSUNLOCKNODE(dnp); 2492 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2493 } 2494 /* 2495 * If negative lookup caching is enabled, I might as well 2496 * add an entry for this node. Not necessary for correctness, 2497 * but if negative caching is enabled, then the system 2498 * must care about lookup caching hit rate, so... 2499 */ 2500 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2501 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2502 if (dvp != newvp) 2503 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 2504 NULL); 2505 else 2506 printf("nfs_symlink: bogus NFS server returned " 2507 "the directory as the new file object\n"); 2508 } 2509 return (error); 2510 } 2511 2512 /* 2513 * nfs make dir call 2514 */ 2515 static int 2516 nfs_mkdir(struct vop_mkdir_args *ap) 2517 { 2518 struct vnode *dvp = ap->a_dvp; 2519 struct vattr *vap = ap->a_vap; 2520 struct componentname *cnp = ap->a_cnp; 2521 struct nfsnode *np = NULL, *dnp; 2522 struct vnode *newvp = NULL; 2523 struct vattr vattr; 2524 struct nfsfh *nfhp; 2525 struct nfsvattr nfsva, dnfsva; 2526 int error = 0, attrflag, dattrflag, ret; 2527 2528 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) 2529 return (error); 2530 vap->va_type = VDIR; 2531 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2532 vap, cnp->cn_cred, curthread, &dnfsva, &nfsva, &nfhp, 2533 &attrflag, &dattrflag); 2534 dnp = VTONFS(dvp); 2535 NFSLOCKNODE(dnp); 2536 dnp->n_flag |= NMODIFIED; 2537 if (dattrflag != 0) { 2538 NFSUNLOCKNODE(dnp); 2539 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2540 } else { 2541 dnp->n_attrstamp = 0; 2542 NFSUNLOCKNODE(dnp); 2543 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2544 } 2545 if (nfhp) { 2546 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2547 &np, LK_EXCLUSIVE); 2548 if (!ret) { 2549 newvp = NFSTOV(np); 2550 if (attrflag) 2551 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 2552 0, 1); 2553 } else if (!error) 2554 error = ret; 2555 } 2556 if (!error && newvp == NULL) { 2557 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2558 cnp->cn_cred, curthread, &np); 2559 if (!error) { 2560 newvp = NFSTOV(np); 2561 if (newvp->v_type != VDIR) 2562 error = EEXIST; 2563 } 2564 } 2565 if (error) { 2566 if (newvp) 2567 vput(newvp); 2568 if (NFS_ISV4(dvp)) 2569 error = nfscl_maperr(curthread, error, 2570 vap->va_uid, vap->va_gid); 2571 } else { 2572 /* 2573 * If negative lookup caching is enabled, I might as well 2574 * add an entry for this node. Not necessary for correctness, 2575 * but if negative caching is enabled, then the system 2576 * must care about lookup caching hit rate, so... 2577 */ 2578 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2579 (cnp->cn_flags & MAKEENTRY) && 2580 attrflag != 0 && dattrflag != 0) { 2581 if (dvp != newvp) 2582 cache_enter_time(dvp, newvp, cnp, 2583 &nfsva.na_ctime, &dnfsva.na_ctime); 2584 else 2585 printf("nfs_mkdir: bogus NFS server returned " 2586 "the directory that the directory was " 2587 "created in as the new file object\n"); 2588 } 2589 *ap->a_vpp = newvp; 2590 } 2591 return (error); 2592 } 2593 2594 /* 2595 * nfs remove directory call 2596 */ 2597 static int 2598 nfs_rmdir(struct vop_rmdir_args *ap) 2599 { 2600 struct vnode *vp = ap->a_vp; 2601 struct vnode *dvp = ap->a_dvp; 2602 struct componentname *cnp = ap->a_cnp; 2603 struct nfsnode *dnp; 2604 struct nfsvattr dnfsva; 2605 int error, dattrflag; 2606 2607 if (dvp == vp) 2608 return (EINVAL); 2609 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2610 cnp->cn_cred, curthread, &dnfsva, &dattrflag); 2611 dnp = VTONFS(dvp); 2612 NFSLOCKNODE(dnp); 2613 dnp->n_flag |= NMODIFIED; 2614 if (dattrflag != 0) { 2615 NFSUNLOCKNODE(dnp); 2616 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2617 } else { 2618 dnp->n_attrstamp = 0; 2619 NFSUNLOCKNODE(dnp); 2620 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2621 } 2622 2623 cache_purge(dvp); 2624 cache_purge(vp); 2625 if (error && NFS_ISV4(dvp)) 2626 error = nfscl_maperr(curthread, error, (uid_t)0, 2627 (gid_t)0); 2628 /* 2629 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2630 */ 2631 if (error == ENOENT) 2632 error = 0; 2633 return (error); 2634 } 2635 2636 /* 2637 * nfs readdir call 2638 */ 2639 static int 2640 nfs_readdir(struct vop_readdir_args *ap) 2641 { 2642 struct vnode *vp = ap->a_vp; 2643 struct nfsnode *np = VTONFS(vp); 2644 struct uio *uio = ap->a_uio; 2645 ssize_t tresid, left; 2646 int error = 0; 2647 struct vattr vattr; 2648 2649 if (ap->a_eofflag != NULL) 2650 *ap->a_eofflag = 0; 2651 if (vp->v_type != VDIR) 2652 return(EPERM); 2653 2654 /* 2655 * First, check for hit on the EOF offset cache 2656 */ 2657 NFSLOCKNODE(np); 2658 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2659 (np->n_flag & NMODIFIED) == 0) { 2660 NFSUNLOCKNODE(np); 2661 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) { 2662 NFSLOCKNODE(np); 2663 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) || 2664 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 2665 NFSUNLOCKNODE(np); 2666 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits); 2667 if (ap->a_eofflag != NULL) 2668 *ap->a_eofflag = 1; 2669 return (0); 2670 } else 2671 NFSUNLOCKNODE(np); 2672 } 2673 } else 2674 NFSUNLOCKNODE(np); 2675 2676 /* 2677 * NFS always guarantees that directory entries don't straddle 2678 * DIRBLKSIZ boundaries. As such, we need to limit the size 2679 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial 2680 * directory entry. 2681 */ 2682 left = uio->uio_resid % DIRBLKSIZ; 2683 if (left == uio->uio_resid) 2684 return (EINVAL); 2685 uio->uio_resid -= left; 2686 2687 /* 2688 * For readdirplus, if starting to read the directory, 2689 * purge the name cache, since it will be reloaded by 2690 * this directory read. 2691 * This removes potentially stale name cache entries. 2692 */ 2693 if (uio->uio_offset == 0 && 2694 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_RDIRPLUS) != 0) 2695 cache_purge(vp); 2696 2697 /* 2698 * Call ncl_bioread() to do the real work. 2699 */ 2700 tresid = uio->uio_resid; 2701 error = ncl_bioread(vp, uio, 0, ap->a_cred); 2702 2703 if (!error && uio->uio_resid == tresid) { 2704 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses); 2705 if (ap->a_eofflag != NULL) 2706 *ap->a_eofflag = 1; 2707 } 2708 2709 /* Add the partial DIRBLKSIZ (left) back in. */ 2710 uio->uio_resid += left; 2711 return (error); 2712 } 2713 2714 /* 2715 * Readdir rpc call. 2716 * Called from below the buffer cache by ncl_doio(). 2717 */ 2718 int 2719 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2720 struct thread *td) 2721 { 2722 struct nfsvattr nfsva; 2723 nfsuint64 *cookiep, cookie; 2724 struct nfsnode *dnp = VTONFS(vp); 2725 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2726 int error = 0, eof, attrflag; 2727 2728 KASSERT(uiop->uio_iovcnt == 1 && 2729 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2730 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2731 ("nfs readdirrpc bad uio")); 2732 2733 /* 2734 * If there is no cookie, assume directory was stale. 2735 */ 2736 ncl_dircookie_lock(dnp); 2737 NFSUNLOCKNODE(dnp); 2738 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2739 if (cookiep) { 2740 cookie = *cookiep; 2741 ncl_dircookie_unlock(dnp); 2742 } else { 2743 ncl_dircookie_unlock(dnp); 2744 return (NFSERR_BAD_COOKIE); 2745 } 2746 2747 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2748 (void)ncl_fsinfo(nmp, vp, cred, td); 2749 2750 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva, 2751 &attrflag, &eof); 2752 if (attrflag) 2753 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2754 2755 if (!error) { 2756 /* 2757 * We are now either at the end of the directory or have filled 2758 * the block. 2759 */ 2760 if (eof) { 2761 NFSLOCKNODE(dnp); 2762 dnp->n_direofoffset = uiop->uio_offset; 2763 NFSUNLOCKNODE(dnp); 2764 } else { 2765 if (uiop->uio_resid > 0) 2766 printf("EEK! readdirrpc resid > 0\n"); 2767 ncl_dircookie_lock(dnp); 2768 NFSUNLOCKNODE(dnp); 2769 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2770 *cookiep = cookie; 2771 ncl_dircookie_unlock(dnp); 2772 } 2773 } else if (NFS_ISV4(vp)) { 2774 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2775 } 2776 return (error); 2777 } 2778 2779 /* 2780 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc(). 2781 */ 2782 int 2783 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2784 struct thread *td) 2785 { 2786 struct nfsvattr nfsva; 2787 nfsuint64 *cookiep, cookie; 2788 struct nfsnode *dnp = VTONFS(vp); 2789 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2790 int error = 0, attrflag, eof; 2791 2792 KASSERT(uiop->uio_iovcnt == 1 && 2793 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2794 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2795 ("nfs readdirplusrpc bad uio")); 2796 2797 /* 2798 * If there is no cookie, assume directory was stale. 2799 */ 2800 ncl_dircookie_lock(dnp); 2801 NFSUNLOCKNODE(dnp); 2802 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2803 if (cookiep) { 2804 cookie = *cookiep; 2805 ncl_dircookie_unlock(dnp); 2806 } else { 2807 ncl_dircookie_unlock(dnp); 2808 return (NFSERR_BAD_COOKIE); 2809 } 2810 2811 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2812 (void)ncl_fsinfo(nmp, vp, cred, td); 2813 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva, 2814 &attrflag, &eof); 2815 if (attrflag) 2816 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2817 2818 if (!error) { 2819 /* 2820 * We are now either at end of the directory or have filled the 2821 * the block. 2822 */ 2823 if (eof) { 2824 NFSLOCKNODE(dnp); 2825 dnp->n_direofoffset = uiop->uio_offset; 2826 NFSUNLOCKNODE(dnp); 2827 } else { 2828 if (uiop->uio_resid > 0) 2829 printf("EEK! readdirplusrpc resid > 0\n"); 2830 ncl_dircookie_lock(dnp); 2831 NFSUNLOCKNODE(dnp); 2832 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2833 *cookiep = cookie; 2834 ncl_dircookie_unlock(dnp); 2835 } 2836 } else if (NFS_ISV4(vp)) { 2837 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2838 } 2839 return (error); 2840 } 2841 2842 /* 2843 * Silly rename. To make the NFS filesystem that is stateless look a little 2844 * more like the "ufs" a remove of an active vnode is translated to a rename 2845 * to a funny looking filename that is removed by nfs_inactive on the 2846 * nfsnode. There is the potential for another process on a different client 2847 * to create the same funny name between the nfs_lookitup() fails and the 2848 * nfs_rename() completes, but... 2849 */ 2850 static int 2851 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2852 { 2853 struct sillyrename *sp; 2854 struct nfsnode *np; 2855 int error; 2856 short pid; 2857 unsigned int lticks; 2858 2859 cache_purge(dvp); 2860 np = VTONFS(vp); 2861 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir")); 2862 sp = malloc(sizeof (struct sillyrename), 2863 M_NEWNFSREQ, M_WAITOK); 2864 sp->s_cred = crhold(cnp->cn_cred); 2865 sp->s_dvp = dvp; 2866 VREF(dvp); 2867 2868 /* 2869 * Fudge together a funny name. 2870 * Changing the format of the funny name to accommodate more 2871 * sillynames per directory. 2872 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is 2873 * CPU ticks since boot. 2874 */ 2875 pid = curthread->td_proc->p_pid; 2876 lticks = (unsigned int)ticks; 2877 for ( ; ; ) { 2878 sp->s_namlen = sprintf(sp->s_name, 2879 ".nfs.%08x.%04x4.4", lticks, 2880 pid); 2881 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2882 curthread, NULL)) 2883 break; 2884 lticks++; 2885 } 2886 error = nfs_renameit(dvp, vp, cnp, sp); 2887 if (error) 2888 goto bad; 2889 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2890 curthread, &np); 2891 np->n_sillyrename = sp; 2892 return (0); 2893 bad: 2894 vrele(sp->s_dvp); 2895 crfree(sp->s_cred); 2896 free(sp, M_NEWNFSREQ); 2897 return (error); 2898 } 2899 2900 /* 2901 * Look up a file name and optionally either update the file handle or 2902 * allocate an nfsnode, depending on the value of npp. 2903 * npp == NULL --> just do the lookup 2904 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2905 * handled too 2906 * *npp != NULL --> update the file handle in the vnode 2907 */ 2908 static int 2909 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred, 2910 struct thread *td, struct nfsnode **npp) 2911 { 2912 struct vnode *newvp = NULL, *vp; 2913 struct nfsnode *np, *dnp = VTONFS(dvp); 2914 struct nfsfh *nfhp, *onfhp; 2915 struct nfsvattr nfsva, dnfsva; 2916 struct componentname cn; 2917 int error = 0, attrflag, dattrflag; 2918 u_int hash; 2919 struct timespec ts; 2920 2921 nanouptime(&ts); 2922 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva, 2923 &nfhp, &attrflag, &dattrflag, 0); 2924 if (dattrflag) 2925 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2926 if (npp && !error) { 2927 if (*npp != NULL) { 2928 np = *npp; 2929 vp = NFSTOV(np); 2930 /* 2931 * For NFSv4, check to see if it is the same name and 2932 * replace the name, if it is different. 2933 */ 2934 if (np->n_v4 != NULL && nfsva.na_type == VREG && 2935 (np->n_v4->n4_namelen != len || 2936 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) || 2937 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 2938 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2939 dnp->n_fhp->nfh_len))) { 2940 free(np->n_v4, M_NFSV4NODE); 2941 np->n_v4 = malloc( 2942 sizeof (struct nfsv4node) + 2943 dnp->n_fhp->nfh_len + len - 1, 2944 M_NFSV4NODE, M_WAITOK); 2945 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 2946 np->n_v4->n4_namelen = len; 2947 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2948 dnp->n_fhp->nfh_len); 2949 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len); 2950 } 2951 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, 2952 FNV1_32_INIT); 2953 onfhp = np->n_fhp; 2954 /* 2955 * Rehash node for new file handle. 2956 */ 2957 vfs_hash_rehash(vp, hash); 2958 np->n_fhp = nfhp; 2959 if (onfhp != NULL) 2960 free(onfhp, M_NFSFH); 2961 newvp = NFSTOV(np); 2962 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) { 2963 free(nfhp, M_NFSFH); 2964 VREF(dvp); 2965 newvp = dvp; 2966 } else { 2967 cn.cn_nameptr = name; 2968 cn.cn_namelen = len; 2969 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td, 2970 &np, LK_EXCLUSIVE); 2971 if (error) 2972 return (error); 2973 newvp = NFSTOV(np); 2974 /* 2975 * If n_localmodtime >= time before RPC, then 2976 * a file modification operation, such as 2977 * VOP_SETATTR() of size, has occurred while 2978 * the Lookup RPC and acquisition of the vnode 2979 * happened. As such, the attributes might 2980 * be stale, with possibly an incorrect size. 2981 */ 2982 NFSLOCKNODE(np); 2983 if (timespecisset(&np->n_localmodtime) && 2984 timespeccmp(&np->n_localmodtime, &ts, >=)) { 2985 NFSCL_DEBUG(4, "nfs_lookitup: localmod " 2986 "stale attributes\n"); 2987 attrflag = 0; 2988 } 2989 NFSUNLOCKNODE(np); 2990 } 2991 if (!attrflag && *npp == NULL) { 2992 if (newvp == dvp) 2993 vrele(newvp); 2994 else 2995 vput(newvp); 2996 return (ENOENT); 2997 } 2998 if (attrflag) 2999 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 3000 } 3001 if (npp && *npp == NULL) { 3002 if (error) { 3003 if (newvp) { 3004 if (newvp == dvp) 3005 vrele(newvp); 3006 else 3007 vput(newvp); 3008 } 3009 } else 3010 *npp = np; 3011 } 3012 if (error && NFS_ISV4(dvp)) 3013 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3014 return (error); 3015 } 3016 3017 /* 3018 * Nfs Version 3 and 4 commit rpc 3019 */ 3020 int 3021 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, 3022 struct thread *td) 3023 { 3024 struct nfsvattr nfsva; 3025 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3026 struct nfsnode *np; 3027 struct uio uio; 3028 int error, attrflag; 3029 3030 np = VTONFS(vp); 3031 error = EIO; 3032 attrflag = 0; 3033 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) { 3034 uio.uio_offset = offset; 3035 uio.uio_resid = cnt; 3036 error = nfscl_doiods(vp, &uio, NULL, NULL, 3037 NFSV4OPEN_ACCESSWRITE, 1, cred, td); 3038 if (error != 0) { 3039 NFSLOCKNODE(np); 3040 np->n_flag &= ~NDSCOMMIT; 3041 NFSUNLOCKNODE(np); 3042 } 3043 } 3044 if (error != 0) { 3045 mtx_lock(&nmp->nm_mtx); 3046 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { 3047 mtx_unlock(&nmp->nm_mtx); 3048 return (0); 3049 } 3050 mtx_unlock(&nmp->nm_mtx); 3051 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva, 3052 &attrflag); 3053 } 3054 if (attrflag != 0) 3055 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3056 if (error != 0 && NFS_ISV4(vp)) 3057 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3058 return (error); 3059 } 3060 3061 /* 3062 * Strategy routine. 3063 * For async requests when nfsiod(s) are running, queue the request by 3064 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the 3065 * request. 3066 */ 3067 static int 3068 nfs_strategy(struct vop_strategy_args *ap) 3069 { 3070 struct buf *bp; 3071 struct vnode *vp; 3072 struct ucred *cr; 3073 3074 bp = ap->a_bp; 3075 vp = ap->a_vp; 3076 KASSERT(bp->b_vp == vp, ("missing b_getvp")); 3077 KASSERT(!(bp->b_flags & B_DONE), 3078 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); 3079 3080 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno) 3081 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize / 3082 DEV_BSIZE); 3083 if (bp->b_iocmd == BIO_READ) 3084 cr = bp->b_rcred; 3085 else 3086 cr = bp->b_wcred; 3087 3088 /* 3089 * If the op is asynchronous and an i/o daemon is waiting 3090 * queue the request, wake it up and wait for completion 3091 * otherwise just do it ourselves. 3092 */ 3093 if ((bp->b_flags & B_ASYNC) == 0 || 3094 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread)) 3095 (void) ncl_doio(vp, bp, cr, curthread, 1); 3096 return (0); 3097 } 3098 3099 /* 3100 * fsync vnode op. Just call ncl_flush() with commit == 1. 3101 */ 3102 /* ARGSUSED */ 3103 static int 3104 nfs_fsync(struct vop_fsync_args *ap) 3105 { 3106 3107 if (ap->a_vp->v_type != VREG) { 3108 /* 3109 * For NFS, metadata is changed synchronously on the server, 3110 * so there is nothing to flush. Also, ncl_flush() clears 3111 * the NMODIFIED flag and that shouldn't be done here for 3112 * directories. 3113 */ 3114 return (0); 3115 } 3116 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0)); 3117 } 3118 3119 /* 3120 * Flush all the blocks associated with a vnode. 3121 * Walk through the buffer pool and push any dirty pages 3122 * associated with the vnode. 3123 * If the called_from_renewthread argument is TRUE, it has been called 3124 * from the NFSv4 renew thread and, as such, cannot block indefinitely 3125 * waiting for a buffer write to complete. 3126 */ 3127 int 3128 ncl_flush(struct vnode *vp, int waitfor, struct thread *td, 3129 int commit, int called_from_renewthread) 3130 { 3131 struct nfsnode *np = VTONFS(vp); 3132 struct buf *bp; 3133 int i; 3134 struct buf *nbp; 3135 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3136 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 3137 int passone = 1, trycnt = 0; 3138 u_quad_t off, endoff, toff; 3139 struct ucred* wcred = NULL; 3140 struct buf **bvec = NULL; 3141 struct bufobj *bo; 3142 #ifndef NFS_COMMITBVECSIZ 3143 #define NFS_COMMITBVECSIZ 20 3144 #endif 3145 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 3146 u_int bvecsize = 0, bveccount; 3147 struct timespec ts; 3148 3149 if (called_from_renewthread != 0) 3150 slptimeo = hz; 3151 if (nmp->nm_flag & NFSMNT_INT) 3152 slpflag = PCATCH; 3153 if (!commit) 3154 passone = 0; 3155 bo = &vp->v_bufobj; 3156 /* 3157 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 3158 * server, but has not been committed to stable storage on the server 3159 * yet. On the first pass, the byte range is worked out and the commit 3160 * rpc is done. On the second pass, bwrite() is called to do the 3161 * job. 3162 */ 3163 again: 3164 off = (u_quad_t)-1; 3165 endoff = 0; 3166 bvecpos = 0; 3167 if (NFS_ISV34(vp) && commit) { 3168 if (bvec != NULL && bvec != bvec_on_stack) 3169 free(bvec, M_TEMP); 3170 /* 3171 * Count up how many buffers waiting for a commit. 3172 */ 3173 bveccount = 0; 3174 BO_LOCK(bo); 3175 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 3176 if (!BUF_ISLOCKED(bp) && 3177 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 3178 == (B_DELWRI | B_NEEDCOMMIT)) 3179 bveccount++; 3180 } 3181 /* 3182 * Allocate space to remember the list of bufs to commit. It is 3183 * important to use M_NOWAIT here to avoid a race with nfs_write. 3184 * If we can't get memory (for whatever reason), we will end up 3185 * committing the buffers one-by-one in the loop below. 3186 */ 3187 if (bveccount > NFS_COMMITBVECSIZ) { 3188 /* 3189 * Release the vnode interlock to avoid a lock 3190 * order reversal. 3191 */ 3192 BO_UNLOCK(bo); 3193 bvec = (struct buf **) 3194 malloc(bveccount * sizeof(struct buf *), 3195 M_TEMP, M_NOWAIT); 3196 BO_LOCK(bo); 3197 if (bvec == NULL) { 3198 bvec = bvec_on_stack; 3199 bvecsize = NFS_COMMITBVECSIZ; 3200 } else 3201 bvecsize = bveccount; 3202 } else { 3203 bvec = bvec_on_stack; 3204 bvecsize = NFS_COMMITBVECSIZ; 3205 } 3206 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 3207 if (bvecpos >= bvecsize) 3208 break; 3209 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 3210 nbp = TAILQ_NEXT(bp, b_bobufs); 3211 continue; 3212 } 3213 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3214 (B_DELWRI | B_NEEDCOMMIT)) { 3215 BUF_UNLOCK(bp); 3216 nbp = TAILQ_NEXT(bp, b_bobufs); 3217 continue; 3218 } 3219 BO_UNLOCK(bo); 3220 bremfree(bp); 3221 /* 3222 * Work out if all buffers are using the same cred 3223 * so we can deal with them all with one commit. 3224 * 3225 * NOTE: we are not clearing B_DONE here, so we have 3226 * to do it later on in this routine if we intend to 3227 * initiate I/O on the bp. 3228 * 3229 * Note: to avoid loopback deadlocks, we do not 3230 * assign b_runningbufspace. 3231 */ 3232 if (wcred == NULL) 3233 wcred = bp->b_wcred; 3234 else if (wcred != bp->b_wcred) 3235 wcred = NOCRED; 3236 vfs_busy_pages(bp, 0); 3237 3238 BO_LOCK(bo); 3239 /* 3240 * bp is protected by being locked, but nbp is not 3241 * and vfs_busy_pages() may sleep. We have to 3242 * recalculate nbp. 3243 */ 3244 nbp = TAILQ_NEXT(bp, b_bobufs); 3245 3246 /* 3247 * A list of these buffers is kept so that the 3248 * second loop knows which buffers have actually 3249 * been committed. This is necessary, since there 3250 * may be a race between the commit rpc and new 3251 * uncommitted writes on the file. 3252 */ 3253 bvec[bvecpos++] = bp; 3254 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3255 bp->b_dirtyoff; 3256 if (toff < off) 3257 off = toff; 3258 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 3259 if (toff > endoff) 3260 endoff = toff; 3261 } 3262 BO_UNLOCK(bo); 3263 } 3264 if (bvecpos > 0) { 3265 /* 3266 * Commit data on the server, as required. 3267 * If all bufs are using the same wcred, then use that with 3268 * one call for all of them, otherwise commit each one 3269 * separately. 3270 */ 3271 if (wcred != NOCRED) 3272 retv = ncl_commit(vp, off, (int)(endoff - off), 3273 wcred, td); 3274 else { 3275 retv = 0; 3276 for (i = 0; i < bvecpos; i++) { 3277 off_t off, size; 3278 bp = bvec[i]; 3279 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3280 bp->b_dirtyoff; 3281 size = (u_quad_t)(bp->b_dirtyend 3282 - bp->b_dirtyoff); 3283 retv = ncl_commit(vp, off, (int)size, 3284 bp->b_wcred, td); 3285 if (retv) break; 3286 } 3287 } 3288 3289 if (retv == NFSERR_STALEWRITEVERF) 3290 ncl_clearcommit(vp->v_mount); 3291 3292 /* 3293 * Now, either mark the blocks I/O done or mark the 3294 * blocks dirty, depending on whether the commit 3295 * succeeded. 3296 */ 3297 for (i = 0; i < bvecpos; i++) { 3298 bp = bvec[i]; 3299 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3300 if (!NFSCL_FORCEDISM(vp->v_mount) && retv) { 3301 /* 3302 * Error, leave B_DELWRI intact 3303 */ 3304 vfs_unbusy_pages(bp); 3305 brelse(bp); 3306 } else { 3307 /* 3308 * Success, remove B_DELWRI ( bundirty() ). 3309 * 3310 * b_dirtyoff/b_dirtyend seem to be NFS 3311 * specific. We should probably move that 3312 * into bundirty(). XXX 3313 */ 3314 bufobj_wref(bo); 3315 bp->b_flags |= B_ASYNC; 3316 bundirty(bp); 3317 bp->b_flags &= ~B_DONE; 3318 bp->b_ioflags &= ~BIO_ERROR; 3319 bp->b_dirtyoff = bp->b_dirtyend = 0; 3320 bufdone(bp); 3321 } 3322 } 3323 } 3324 3325 /* 3326 * Start/do any write(s) that are required. 3327 */ 3328 loop: 3329 BO_LOCK(bo); 3330 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 3331 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 3332 if (waitfor != MNT_WAIT || passone) 3333 continue; 3334 3335 error = BUF_TIMELOCK(bp, 3336 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 3337 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo); 3338 if (error == 0) { 3339 BUF_UNLOCK(bp); 3340 goto loop; 3341 } 3342 if (error == ENOLCK) { 3343 error = 0; 3344 goto loop; 3345 } 3346 if (called_from_renewthread != 0) { 3347 /* 3348 * Return EIO so the flush will be retried 3349 * later. 3350 */ 3351 error = EIO; 3352 goto done; 3353 } 3354 if (newnfs_sigintr(nmp, td)) { 3355 error = EINTR; 3356 goto done; 3357 } 3358 if (slpflag == PCATCH) { 3359 slpflag = 0; 3360 slptimeo = 2 * hz; 3361 } 3362 goto loop; 3363 } 3364 if ((bp->b_flags & B_DELWRI) == 0) 3365 panic("nfs_fsync: not dirty"); 3366 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { 3367 BUF_UNLOCK(bp); 3368 continue; 3369 } 3370 BO_UNLOCK(bo); 3371 bremfree(bp); 3372 bp->b_flags |= B_ASYNC; 3373 bwrite(bp); 3374 if (newnfs_sigintr(nmp, td)) { 3375 error = EINTR; 3376 goto done; 3377 } 3378 goto loop; 3379 } 3380 if (passone) { 3381 passone = 0; 3382 BO_UNLOCK(bo); 3383 goto again; 3384 } 3385 if (waitfor == MNT_WAIT) { 3386 while (bo->bo_numoutput) { 3387 error = bufobj_wwait(bo, slpflag, slptimeo); 3388 if (error) { 3389 BO_UNLOCK(bo); 3390 if (called_from_renewthread != 0) { 3391 /* 3392 * Return EIO so that the flush will be 3393 * retried later. 3394 */ 3395 error = EIO; 3396 goto done; 3397 } 3398 error = newnfs_sigintr(nmp, td); 3399 if (error) 3400 goto done; 3401 if (slpflag == PCATCH) { 3402 slpflag = 0; 3403 slptimeo = 2 * hz; 3404 } 3405 BO_LOCK(bo); 3406 } 3407 } 3408 if (bo->bo_dirty.bv_cnt != 0 && commit) { 3409 BO_UNLOCK(bo); 3410 goto loop; 3411 } 3412 /* 3413 * Wait for all the async IO requests to drain 3414 */ 3415 BO_UNLOCK(bo); 3416 } else 3417 BO_UNLOCK(bo); 3418 if (NFSHASPNFS(nmp)) { 3419 nfscl_layoutcommit(vp, td); 3420 /* 3421 * Invalidate the attribute cache, since writes to a DS 3422 * won't update the size attribute. 3423 */ 3424 NFSLOCKNODE(np); 3425 np->n_attrstamp = 0; 3426 } else 3427 NFSLOCKNODE(np); 3428 if (np->n_flag & NWRITEERR) { 3429 error = np->n_error; 3430 np->n_flag &= ~NWRITEERR; 3431 } 3432 if (commit && bo->bo_dirty.bv_cnt == 0 && 3433 bo->bo_numoutput == 0) 3434 np->n_flag &= ~NMODIFIED; 3435 NFSUNLOCKNODE(np); 3436 done: 3437 if (bvec != NULL && bvec != bvec_on_stack) 3438 free(bvec, M_TEMP); 3439 if (error == 0 && commit != 0 && waitfor == MNT_WAIT && 3440 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0)) { 3441 if (trycnt++ < 5) { 3442 /* try, try again... */ 3443 passone = 1; 3444 wcred = NULL; 3445 bvec = NULL; 3446 bvecsize = 0; 3447 goto again; 3448 } 3449 vn_printf(vp, "ncl_flush failed"); 3450 error = called_from_renewthread != 0 ? EIO : EBUSY; 3451 } 3452 if (error == 0) { 3453 nanouptime(&ts); 3454 NFSLOCKNODE(np); 3455 np->n_localmodtime = ts; 3456 NFSUNLOCKNODE(np); 3457 } 3458 return (error); 3459 } 3460 3461 /* 3462 * NFS advisory byte-level locks. 3463 */ 3464 static int 3465 nfs_advlock(struct vop_advlock_args *ap) 3466 { 3467 struct vnode *vp = ap->a_vp; 3468 struct ucred *cred; 3469 struct nfsnode *np = VTONFS(ap->a_vp); 3470 struct proc *p = (struct proc *)ap->a_id; 3471 struct thread *td = curthread; /* XXX */ 3472 struct vattr va; 3473 int ret, error; 3474 u_quad_t size; 3475 struct nfsmount *nmp; 3476 3477 error = NFSVOPLOCK(vp, LK_SHARED); 3478 if (error != 0) 3479 return (EBADF); 3480 nmp = VFSTONFS(vp->v_mount); 3481 if (!NFS_ISV4(vp) || (nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3482 if ((nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3483 size = np->n_size; 3484 NFSVOPUNLOCK(vp); 3485 error = lf_advlock(ap, &(vp->v_lockf), size); 3486 } else { 3487 if (nfs_advlock_p != NULL) 3488 error = nfs_advlock_p(ap); 3489 else { 3490 NFSVOPUNLOCK(vp); 3491 error = ENOLCK; 3492 } 3493 } 3494 if (error == 0 && ap->a_op == F_SETLK) { 3495 error = NFSVOPLOCK(vp, LK_SHARED); 3496 if (error == 0) { 3497 /* Mark that a file lock has been acquired. */ 3498 NFSLOCKNODE(np); 3499 np->n_flag |= NHASBEENLOCKED; 3500 NFSUNLOCKNODE(np); 3501 NFSVOPUNLOCK(vp); 3502 } 3503 } 3504 return (error); 3505 } else if ((ap->a_flags & (F_POSIX | F_FLOCK)) != 0) { 3506 if (vp->v_type != VREG) { 3507 error = EINVAL; 3508 goto out; 3509 } 3510 if ((ap->a_flags & F_POSIX) != 0) 3511 cred = p->p_ucred; 3512 else 3513 cred = td->td_ucred; 3514 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 3515 if (VN_IS_DOOMED(vp)) { 3516 error = EBADF; 3517 goto out; 3518 } 3519 3520 /* 3521 * If this is unlocking a write locked region, flush and 3522 * commit them before unlocking. This is required by 3523 * RFC3530 Sec. 9.3.2. 3524 */ 3525 if (ap->a_op == F_UNLCK && 3526 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id, 3527 ap->a_flags)) 3528 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0); 3529 3530 /* 3531 * Mark NFS node as might have acquired a lock. 3532 * This is separate from NHASBEENLOCKED, because it must 3533 * be done before the nfsrpc_advlock() call, which might 3534 * add a nfscllock structure to the client state. 3535 * It is used to check for the case where a nfscllock 3536 * state structure cannot exist for the file. 3537 * Only done for "oneopenown" NFSv4.1/4.2 mounts. 3538 */ 3539 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) { 3540 NFSLOCKNODE(np); 3541 np->n_flag |= NMIGHTBELOCKED; 3542 NFSUNLOCKNODE(np); 3543 } 3544 3545 /* 3546 * Loop around doing the lock op, while a blocking lock 3547 * must wait for the lock op to succeed. 3548 */ 3549 do { 3550 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op, 3551 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags); 3552 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3553 ap->a_op == F_SETLK) { 3554 NFSVOPUNLOCK(vp); 3555 error = nfs_catnap(PZERO | PCATCH, ret, 3556 "ncladvl"); 3557 if (error) 3558 return (EINTR); 3559 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3560 if (VN_IS_DOOMED(vp)) { 3561 error = EBADF; 3562 goto out; 3563 } 3564 } 3565 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3566 ap->a_op == F_SETLK); 3567 if (ret == NFSERR_DENIED) { 3568 error = EAGAIN; 3569 goto out; 3570 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) { 3571 error = ret; 3572 goto out; 3573 } else if (ret != 0) { 3574 error = EACCES; 3575 goto out; 3576 } 3577 3578 /* 3579 * Now, if we just got a lock, invalidate data in the buffer 3580 * cache, as required, so that the coherency conforms with 3581 * RFC3530 Sec. 9.3.2. 3582 */ 3583 if (ap->a_op == F_SETLK) { 3584 if ((np->n_flag & NMODIFIED) == 0) { 3585 np->n_attrstamp = 0; 3586 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3587 ret = VOP_GETATTR(vp, &va, cred); 3588 } 3589 if ((np->n_flag & NMODIFIED) || ret || 3590 np->n_change != va.va_filerev) { 3591 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1); 3592 np->n_attrstamp = 0; 3593 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3594 ret = VOP_GETATTR(vp, &va, cred); 3595 if (!ret) { 3596 np->n_mtime = va.va_mtime; 3597 np->n_change = va.va_filerev; 3598 } 3599 } 3600 /* Mark that a file lock has been acquired. */ 3601 NFSLOCKNODE(np); 3602 np->n_flag |= NHASBEENLOCKED; 3603 NFSUNLOCKNODE(np); 3604 } 3605 } else 3606 error = EOPNOTSUPP; 3607 out: 3608 NFSVOPUNLOCK(vp); 3609 return (error); 3610 } 3611 3612 /* 3613 * NFS advisory byte-level locks. 3614 */ 3615 static int 3616 nfs_advlockasync(struct vop_advlockasync_args *ap) 3617 { 3618 struct vnode *vp = ap->a_vp; 3619 u_quad_t size; 3620 int error; 3621 3622 error = NFSVOPLOCK(vp, LK_SHARED); 3623 if (error) 3624 return (error); 3625 if (NFS_ISV4(vp)) { 3626 NFSVOPUNLOCK(vp); 3627 return (EOPNOTSUPP); 3628 } 3629 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 3630 size = VTONFS(vp)->n_size; 3631 NFSVOPUNLOCK(vp); 3632 error = lf_advlockasync(ap, &(vp->v_lockf), size); 3633 } else { 3634 NFSVOPUNLOCK(vp); 3635 error = EOPNOTSUPP; 3636 } 3637 return (error); 3638 } 3639 3640 /* 3641 * Print out the contents of an nfsnode. 3642 */ 3643 static int 3644 nfs_print(struct vop_print_args *ap) 3645 { 3646 struct vnode *vp = ap->a_vp; 3647 struct nfsnode *np = VTONFS(vp); 3648 3649 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid, 3650 (uintmax_t)np->n_vattr.na_fsid); 3651 if (vp->v_type == VFIFO) 3652 fifo_printinfo(vp); 3653 printf("\n"); 3654 return (0); 3655 } 3656 3657 /* 3658 * nfs special file access vnode op. 3659 * Essentially just get vattr and then imitate iaccess() since the device is 3660 * local to the client. 3661 */ 3662 static int 3663 nfsspec_access(struct vop_access_args *ap) 3664 { 3665 struct vattr *vap; 3666 struct ucred *cred = ap->a_cred; 3667 struct vnode *vp = ap->a_vp; 3668 accmode_t accmode = ap->a_accmode; 3669 struct vattr vattr; 3670 int error; 3671 3672 /* 3673 * Disallow write attempts on filesystems mounted read-only; 3674 * unless the file is a socket, fifo, or a block or character 3675 * device resident on the filesystem. 3676 */ 3677 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3678 switch (vp->v_type) { 3679 case VREG: 3680 case VDIR: 3681 case VLNK: 3682 return (EROFS); 3683 default: 3684 break; 3685 } 3686 } 3687 vap = &vattr; 3688 error = VOP_GETATTR(vp, vap, cred); 3689 if (error) 3690 goto out; 3691 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, 3692 accmode, cred); 3693 out: 3694 return error; 3695 } 3696 3697 /* 3698 * Read wrapper for fifos. 3699 */ 3700 static int 3701 nfsfifo_read(struct vop_read_args *ap) 3702 { 3703 struct nfsnode *np = VTONFS(ap->a_vp); 3704 int error; 3705 3706 /* 3707 * Set access flag. 3708 */ 3709 NFSLOCKNODE(np); 3710 np->n_flag |= NACC; 3711 vfs_timestamp(&np->n_atim); 3712 NFSUNLOCKNODE(np); 3713 error = fifo_specops.vop_read(ap); 3714 return error; 3715 } 3716 3717 /* 3718 * Write wrapper for fifos. 3719 */ 3720 static int 3721 nfsfifo_write(struct vop_write_args *ap) 3722 { 3723 struct nfsnode *np = VTONFS(ap->a_vp); 3724 3725 /* 3726 * Set update flag. 3727 */ 3728 NFSLOCKNODE(np); 3729 np->n_flag |= NUPD; 3730 vfs_timestamp(&np->n_mtim); 3731 NFSUNLOCKNODE(np); 3732 return(fifo_specops.vop_write(ap)); 3733 } 3734 3735 /* 3736 * Close wrapper for fifos. 3737 * 3738 * Update the times on the nfsnode then do fifo close. 3739 */ 3740 static int 3741 nfsfifo_close(struct vop_close_args *ap) 3742 { 3743 struct vnode *vp = ap->a_vp; 3744 struct nfsnode *np = VTONFS(vp); 3745 struct vattr vattr; 3746 struct timespec ts; 3747 3748 NFSLOCKNODE(np); 3749 if (np->n_flag & (NACC | NUPD)) { 3750 vfs_timestamp(&ts); 3751 if (np->n_flag & NACC) 3752 np->n_atim = ts; 3753 if (np->n_flag & NUPD) 3754 np->n_mtim = ts; 3755 np->n_flag |= NCHG; 3756 if (vrefcnt(vp) == 1 && 3757 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3758 VATTR_NULL(&vattr); 3759 if (np->n_flag & NACC) 3760 vattr.va_atime = np->n_atim; 3761 if (np->n_flag & NUPD) 3762 vattr.va_mtime = np->n_mtim; 3763 NFSUNLOCKNODE(np); 3764 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3765 goto out; 3766 } 3767 } 3768 NFSUNLOCKNODE(np); 3769 out: 3770 return (fifo_specops.vop_close(ap)); 3771 } 3772 3773 static int 3774 nfs_getacl(struct vop_getacl_args *ap) 3775 { 3776 int error; 3777 3778 if (ap->a_type != ACL_TYPE_NFS4) 3779 return (EOPNOTSUPP); 3780 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3781 if (error > NFSERR_STALE) { 3782 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3783 error = EPERM; 3784 } 3785 return (error); 3786 } 3787 3788 static int 3789 nfs_setacl(struct vop_setacl_args *ap) 3790 { 3791 int error; 3792 3793 if (ap->a_type != ACL_TYPE_NFS4) 3794 return (EOPNOTSUPP); 3795 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3796 if (error > NFSERR_STALE) { 3797 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3798 error = EPERM; 3799 } 3800 return (error); 3801 } 3802 3803 /* 3804 * VOP_ADVISE for NFS. 3805 * Just return 0 for any errors, since it is just a hint. 3806 */ 3807 static int 3808 nfs_advise(struct vop_advise_args *ap) 3809 { 3810 struct thread *td = curthread; 3811 struct nfsmount *nmp; 3812 uint64_t len; 3813 int error; 3814 3815 /* 3816 * First do vop_stdadvise() to handle the buffer cache. 3817 */ 3818 error = vop_stdadvise(ap); 3819 if (error != 0) 3820 return (error); 3821 if (ap->a_start < 0 || ap->a_end < 0) 3822 return (0); 3823 if (ap->a_end == OFF_MAX) 3824 len = 0; 3825 else if (ap->a_end < ap->a_start) 3826 return (0); 3827 else 3828 len = ap->a_end - ap->a_start + 1; 3829 nmp = VFSTONFS(ap->a_vp->v_mount); 3830 mtx_lock(&nmp->nm_mtx); 3831 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 3832 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) == 3833 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) { 3834 mtx_unlock(&nmp->nm_mtx); 3835 return (0); 3836 } 3837 mtx_unlock(&nmp->nm_mtx); 3838 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice, 3839 td->td_ucred, td); 3840 if (error == NFSERR_NOTSUPP) { 3841 mtx_lock(&nmp->nm_mtx); 3842 nmp->nm_privflag |= NFSMNTP_NOADVISE; 3843 mtx_unlock(&nmp->nm_mtx); 3844 } 3845 return (0); 3846 } 3847 3848 /* 3849 * nfs allocate call 3850 */ 3851 static int 3852 nfs_allocate(struct vop_allocate_args *ap) 3853 { 3854 struct vnode *vp = ap->a_vp; 3855 struct thread *td = curthread; 3856 struct nfsvattr nfsva; 3857 struct nfsmount *nmp; 3858 struct nfsnode *np; 3859 off_t alen; 3860 int attrflag, error, ret; 3861 struct timespec ts; 3862 struct uio io; 3863 3864 attrflag = 0; 3865 nmp = VFSTONFS(vp->v_mount); 3866 np = VTONFS(vp); 3867 mtx_lock(&nmp->nm_mtx); 3868 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3869 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) { 3870 mtx_unlock(&nmp->nm_mtx); 3871 alen = *ap->a_len; 3872 if ((uint64_t)alen > nfs_maxalloclen) 3873 alen = nfs_maxalloclen; 3874 3875 /* Check the file size limit. */ 3876 io.uio_offset = *ap->a_offset; 3877 io.uio_resid = alen; 3878 error = vn_rlimit_fsize(vp, &io, td); 3879 3880 /* 3881 * Flush first to ensure that the allocate adds to the 3882 * file's allocation on the server. 3883 */ 3884 if (error == 0) { 3885 vnode_pager_clean_sync(vp); 3886 error = ncl_flush(vp, MNT_WAIT, td, 1, 0); 3887 } 3888 if (error == 0) 3889 error = nfsrpc_allocate(vp, *ap->a_offset, alen, 3890 &nfsva, &attrflag, ap->a_cred, td); 3891 if (error == 0) { 3892 *ap->a_offset += alen; 3893 *ap->a_len -= alen; 3894 nanouptime(&ts); 3895 NFSLOCKNODE(np); 3896 np->n_localmodtime = ts; 3897 NFSUNLOCKNODE(np); 3898 } else if (error == NFSERR_NOTSUPP) { 3899 mtx_lock(&nmp->nm_mtx); 3900 nmp->nm_privflag |= NFSMNTP_NOALLOCATE; 3901 mtx_unlock(&nmp->nm_mtx); 3902 error = EINVAL; 3903 } 3904 } else { 3905 mtx_unlock(&nmp->nm_mtx); 3906 error = EINVAL; 3907 } 3908 if (attrflag != 0) { 3909 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3910 if (error == 0 && ret != 0) 3911 error = ret; 3912 } 3913 if (error != 0) 3914 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3915 return (error); 3916 } 3917 3918 /* 3919 * nfs deallocate call 3920 */ 3921 static int 3922 nfs_deallocate(struct vop_deallocate_args *ap) 3923 { 3924 struct vnode *vp = ap->a_vp; 3925 struct thread *td = curthread; 3926 struct nfsvattr nfsva; 3927 struct nfsmount *nmp; 3928 struct nfsnode *np; 3929 off_t tlen, mlen; 3930 int attrflag, error, ret; 3931 bool clipped; 3932 struct timespec ts; 3933 3934 error = 0; 3935 attrflag = 0; 3936 nmp = VFSTONFS(vp->v_mount); 3937 np = VTONFS(vp); 3938 mtx_lock(&nmp->nm_mtx); 3939 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3940 (nmp->nm_privflag & NFSMNTP_NODEALLOCATE) == 0) { 3941 mtx_unlock(&nmp->nm_mtx); 3942 tlen = omin(OFF_MAX - *ap->a_offset, *ap->a_len); 3943 NFSCL_DEBUG(4, "dealloc: off=%jd len=%jd maxfilesize=%ju\n", 3944 (intmax_t)*ap->a_offset, (intmax_t)tlen, 3945 (uintmax_t)nmp->nm_maxfilesize); 3946 if ((uint64_t)*ap->a_offset >= nmp->nm_maxfilesize) { 3947 /* Avoid EFBIG error return from the NFSv4.2 server. */ 3948 *ap->a_len = 0; 3949 return (0); 3950 } 3951 clipped = false; 3952 if ((uint64_t)*ap->a_offset + tlen > nmp->nm_maxfilesize) 3953 tlen = nmp->nm_maxfilesize - *ap->a_offset; 3954 if ((uint64_t)*ap->a_offset < np->n_size) { 3955 /* Limit the len to nfs_maxalloclen before EOF. */ 3956 mlen = omin((off_t)np->n_size - *ap->a_offset, tlen); 3957 if ((uint64_t)mlen > nfs_maxalloclen) { 3958 NFSCL_DEBUG(4, "dealloc: tlen maxalloclen\n"); 3959 tlen = nfs_maxalloclen; 3960 clipped = true; 3961 } 3962 } 3963 if (error == 0) 3964 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 3965 if (error == 0) { 3966 vnode_pager_purge_range(vp, *ap->a_offset, 3967 *ap->a_offset + tlen); 3968 error = nfsrpc_deallocate(vp, *ap->a_offset, tlen, 3969 &nfsva, &attrflag, ap->a_cred, td); 3970 NFSCL_DEBUG(4, "dealloc: rpc=%d\n", error); 3971 } 3972 if (error == 0) { 3973 NFSCL_DEBUG(4, "dealloc: attrflag=%d na_size=%ju\n", 3974 attrflag, (uintmax_t)nfsva.na_size); 3975 nanouptime(&ts); 3976 NFSLOCKNODE(np); 3977 np->n_localmodtime = ts; 3978 NFSUNLOCKNODE(np); 3979 if (attrflag != 0) { 3980 if ((uint64_t)*ap->a_offset < nfsva.na_size) 3981 *ap->a_offset += omin((off_t) 3982 nfsva.na_size - *ap->a_offset, 3983 tlen); 3984 } 3985 if (clipped && tlen < *ap->a_len) 3986 *ap->a_len -= tlen; 3987 else 3988 *ap->a_len = 0; 3989 } else if (error == NFSERR_NOTSUPP) { 3990 mtx_lock(&nmp->nm_mtx); 3991 nmp->nm_privflag |= NFSMNTP_NODEALLOCATE; 3992 mtx_unlock(&nmp->nm_mtx); 3993 } 3994 } else { 3995 mtx_unlock(&nmp->nm_mtx); 3996 error = EIO; 3997 } 3998 /* 3999 * If the NFS server cannot perform the Deallocate operation, just call 4000 * vop_stddeallocate() to perform it. 4001 */ 4002 if (error != 0 && error != NFSERR_FBIG && error != NFSERR_INVAL) { 4003 error = vop_stddeallocate(ap); 4004 NFSCL_DEBUG(4, "dealloc: stddeallocate=%d\n", error); 4005 } 4006 if (attrflag != 0) { 4007 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4008 if (error == 0 && ret != 0) 4009 error = ret; 4010 } 4011 if (error != 0) 4012 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 4013 return (error); 4014 } 4015 4016 /* 4017 * nfs copy_file_range call 4018 */ 4019 static int 4020 nfs_copy_file_range(struct vop_copy_file_range_args *ap) 4021 { 4022 struct vnode *invp = ap->a_invp; 4023 struct vnode *outvp = ap->a_outvp; 4024 struct mount *mp; 4025 vm_object_t invp_obj; 4026 struct nfsvattr innfsva, outnfsva; 4027 struct vattr va, *vap; 4028 struct uio io; 4029 struct nfsmount *nmp; 4030 size_t len, len2; 4031 ssize_t r; 4032 int error, inattrflag, outattrflag, ret, ret2, invp_lock; 4033 off_t inoff, outoff; 4034 bool consecutive, must_commit, tryoutcred; 4035 4036 /* 4037 * NFSv4.2 Copy is not permitted for infile == outfile. 4038 * TODO: copy_file_range() between multiple NFS mountpoints 4039 */ 4040 if (invp == outvp || invp->v_mount != outvp->v_mount) { 4041 generic_copy: 4042 return (ENOSYS); 4043 } 4044 4045 invp_lock = LK_SHARED; 4046 relock: 4047 4048 /* Lock both vnodes, avoiding risk of deadlock. */ 4049 do { 4050 mp = NULL; 4051 error = vn_start_write(outvp, &mp, V_WAIT); 4052 if (error == 0) { 4053 error = vn_lock(outvp, LK_EXCLUSIVE); 4054 if (error == 0) { 4055 error = vn_lock(invp, invp_lock | LK_NOWAIT); 4056 if (error == 0) 4057 break; 4058 VOP_UNLOCK(outvp); 4059 if (mp != NULL) 4060 vn_finished_write(mp); 4061 mp = NULL; 4062 error = vn_lock(invp, invp_lock); 4063 if (error == 0) 4064 VOP_UNLOCK(invp); 4065 } 4066 } 4067 if (mp != NULL) 4068 vn_finished_write(mp); 4069 } while (error == 0); 4070 if (error != 0) 4071 return (error); 4072 4073 /* 4074 * More reasons to avoid nfs copy: not NFSv4.2, or explicitly 4075 * disabled. 4076 */ 4077 nmp = VFSTONFS(invp->v_mount); 4078 mtx_lock(&nmp->nm_mtx); 4079 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4080 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0) { 4081 mtx_unlock(&nmp->nm_mtx); 4082 VOP_UNLOCK(invp); 4083 VOP_UNLOCK(outvp); 4084 if (mp != NULL) 4085 vn_finished_write(mp); 4086 goto generic_copy; 4087 } 4088 mtx_unlock(&nmp->nm_mtx); 4089 4090 /* 4091 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer? 4092 */ 4093 io.uio_offset = *ap->a_outoffp; 4094 io.uio_resid = *ap->a_lenp; 4095 error = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd); 4096 *ap->a_lenp = io.uio_resid; 4097 /* 4098 * No need to call vn_rlimit_fsizex_res before return, since the uio is 4099 * local. 4100 */ 4101 4102 /* 4103 * Flush the input file so that the data is up to date before 4104 * the copy. Flush writes for the output file so that they 4105 * do not overwrite the data copied to the output file by the Copy. 4106 * Set the commit argument for both flushes so that the data is on 4107 * stable storage before the Copy RPC. This is done in case the 4108 * server reboots during the Copy and needs to be redone. 4109 */ 4110 if (error == 0) { 4111 invp_obj = invp->v_object; 4112 if (invp_obj != NULL && vm_object_mightbedirty(invp_obj)) { 4113 if (invp_lock != LK_EXCLUSIVE) { 4114 invp_lock = LK_EXCLUSIVE; 4115 VOP_UNLOCK(invp); 4116 VOP_UNLOCK(outvp); 4117 if (mp != NULL) 4118 vn_finished_write(mp); 4119 goto relock; 4120 } 4121 vnode_pager_clean_sync(invp); 4122 } 4123 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0); 4124 } 4125 if (error == 0) 4126 error = ncl_vinvalbuf(outvp, V_SAVE, curthread, 0); 4127 4128 /* Do the actual NFSv4.2 RPC. */ 4129 ret = ret2 = 0; 4130 len = *ap->a_lenp; 4131 mtx_lock(&nmp->nm_mtx); 4132 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0) 4133 consecutive = true; 4134 else 4135 consecutive = false; 4136 mtx_unlock(&nmp->nm_mtx); 4137 inoff = *ap->a_inoffp; 4138 outoff = *ap->a_outoffp; 4139 tryoutcred = true; 4140 must_commit = false; 4141 if (error == 0) { 4142 vap = &VTONFS(invp)->n_vattr.na_vattr; 4143 error = VOP_GETATTR(invp, vap, ap->a_incred); 4144 if (error == 0) { 4145 /* 4146 * Clip "len" at va_size so that RFC compliant servers 4147 * will not reply NFSERR_INVAL. 4148 * Setting "len == 0" for the RPC would be preferred, 4149 * but some Linux servers do not support that. 4150 * If the len is being set to 0, do a Setattr RPC to 4151 * set the server's atime. This behaviour was the 4152 * preferred one for the FreeBSD "collective". 4153 */ 4154 if (inoff >= vap->va_size) { 4155 *ap->a_lenp = len = 0; 4156 if ((nmp->nm_mountp->mnt_flag & MNT_NOATIME) == 4157 0) { 4158 VATTR_NULL(&va); 4159 va.va_atime.tv_sec = 0; 4160 va.va_atime.tv_nsec = 0; 4161 va.va_vaflags = VA_UTIMES_NULL; 4162 inattrflag = 0; 4163 error = nfsrpc_setattr(invp, &va, NULL, 4164 ap->a_incred, curthread, &innfsva, 4165 &inattrflag); 4166 if (inattrflag != 0) 4167 ret = nfscl_loadattrcache(&invp, 4168 &innfsva, NULL, 0, 1); 4169 if (error == 0 && ret != 0) 4170 error = ret; 4171 } 4172 } else if (inoff + len > vap->va_size) 4173 *ap->a_lenp = len = vap->va_size - inoff; 4174 } else 4175 error = 0; 4176 } 4177 4178 /* 4179 * len will be set to 0 upon a successful Copy RPC. 4180 * As such, this only loops when the Copy RPC needs to be retried. 4181 */ 4182 while (len > 0 && error == 0) { 4183 inattrflag = outattrflag = 0; 4184 len2 = len; 4185 if (tryoutcred) 4186 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4187 outvp, ap->a_outoffp, &len2, ap->a_flags, 4188 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4189 ap->a_outcred, consecutive, &must_commit); 4190 else 4191 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4192 outvp, ap->a_outoffp, &len2, ap->a_flags, 4193 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4194 ap->a_incred, consecutive, &must_commit); 4195 if (inattrflag != 0) 4196 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, 0, 1); 4197 if (outattrflag != 0) 4198 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL, 4199 1, 1); 4200 if (error == 0) { 4201 if (consecutive == false) { 4202 if (len2 == len) { 4203 mtx_lock(&nmp->nm_mtx); 4204 nmp->nm_privflag |= 4205 NFSMNTP_NOCONSECUTIVE; 4206 mtx_unlock(&nmp->nm_mtx); 4207 } else 4208 error = NFSERR_OFFLOADNOREQS; 4209 } 4210 *ap->a_lenp = len2; 4211 len = 0; 4212 if (len2 > 0 && must_commit && error == 0) 4213 error = ncl_commit(outvp, outoff, *ap->a_lenp, 4214 ap->a_outcred, curthread); 4215 if (error == 0 && ret != 0) 4216 error = ret; 4217 if (error == 0 && ret2 != 0) 4218 error = ret2; 4219 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) { 4220 /* 4221 * Try consecutive == false, which is ok only if all 4222 * bytes are copied. 4223 * If only some bytes were copied when consecutive 4224 * is false, there is no way to know which bytes 4225 * still need to be written. 4226 */ 4227 consecutive = false; 4228 error = 0; 4229 } else if (error == NFSERR_ACCES && tryoutcred) { 4230 /* Try again with incred. */ 4231 tryoutcred = false; 4232 error = 0; 4233 } 4234 if (error == NFSERR_STALEWRITEVERF) { 4235 /* 4236 * Server rebooted, so do it all again. 4237 */ 4238 *ap->a_inoffp = inoff; 4239 *ap->a_outoffp = outoff; 4240 len = *ap->a_lenp; 4241 must_commit = false; 4242 error = 0; 4243 } 4244 } 4245 VOP_UNLOCK(invp); 4246 VOP_UNLOCK(outvp); 4247 if (mp != NULL) 4248 vn_finished_write(mp); 4249 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS || 4250 error == NFSERR_ACCES) { 4251 /* 4252 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can 4253 * use a_incred for the read and a_outcred for the write, so 4254 * try this for NFSERR_ACCES failures for the Copy. 4255 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can 4256 * never succeed, so disable it. 4257 */ 4258 if (error != NFSERR_ACCES) { 4259 /* Can never do Copy on this mount. */ 4260 mtx_lock(&nmp->nm_mtx); 4261 nmp->nm_privflag |= NFSMNTP_NOCOPY; 4262 mtx_unlock(&nmp->nm_mtx); 4263 } 4264 *ap->a_inoffp = inoff; 4265 *ap->a_outoffp = outoff; 4266 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 4267 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 4268 ap->a_incred, ap->a_outcred, ap->a_fsizetd); 4269 } else if (error != 0) 4270 *ap->a_lenp = 0; 4271 4272 if (error != 0) 4273 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0); 4274 return (error); 4275 } 4276 4277 /* 4278 * nfs ioctl call 4279 */ 4280 static int 4281 nfs_ioctl(struct vop_ioctl_args *ap) 4282 { 4283 struct vnode *vp = ap->a_vp; 4284 struct nfsvattr nfsva; 4285 struct nfsmount *nmp; 4286 int attrflag, content, error, ret; 4287 bool eof = false; /* shut up compiler. */ 4288 4289 /* Do the actual NFSv4.2 RPC. */ 4290 switch (ap->a_command) { 4291 case FIOSEEKDATA: 4292 content = NFSV4CONTENT_DATA; 4293 break; 4294 case FIOSEEKHOLE: 4295 content = NFSV4CONTENT_HOLE; 4296 break; 4297 default: 4298 return (ENOTTY); 4299 } 4300 4301 error = vn_lock(vp, LK_EXCLUSIVE); 4302 if (error != 0) 4303 return (EBADF); 4304 4305 if (vp->v_type != VREG) { 4306 VOP_UNLOCK(vp); 4307 return (ENOTTY); 4308 } 4309 nmp = VFSTONFS(vp->v_mount); 4310 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) { 4311 VOP_UNLOCK(vp); 4312 error = vop_stdioctl(ap); 4313 return (error); 4314 } 4315 4316 attrflag = 0; 4317 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size) 4318 error = ENXIO; 4319 else { 4320 /* 4321 * Flush all writes, so that the server is up to date. 4322 * Although a Commit is not required, the commit argument 4323 * is set so that, for a pNFS File/Flexible File Layout 4324 * server, the LayoutCommit will be done to ensure the file 4325 * size is up to date on the Metadata Server. 4326 */ 4327 4328 vnode_pager_clean_sync(vp); 4329 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0); 4330 if (error == 0) 4331 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof, 4332 content, ap->a_cred, &nfsva, &attrflag); 4333 /* If at eof for FIOSEEKDATA, return ENXIO. */ 4334 if (eof && error == 0 && content == NFSV4CONTENT_DATA) 4335 error = ENXIO; 4336 } 4337 if (attrflag != 0) { 4338 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4339 if (error == 0 && ret != 0) 4340 error = ret; 4341 } 4342 NFSVOPUNLOCK(vp); 4343 4344 if (error != 0) 4345 error = ENXIO; 4346 return (error); 4347 } 4348 4349 /* 4350 * nfs getextattr call 4351 */ 4352 static int 4353 nfs_getextattr(struct vop_getextattr_args *ap) 4354 { 4355 struct vnode *vp = ap->a_vp; 4356 struct nfsmount *nmp; 4357 struct ucred *cred; 4358 struct thread *td = ap->a_td; 4359 struct nfsvattr nfsva; 4360 ssize_t len; 4361 int attrflag, error, ret; 4362 4363 nmp = VFSTONFS(vp->v_mount); 4364 mtx_lock(&nmp->nm_mtx); 4365 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4366 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4367 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4368 mtx_unlock(&nmp->nm_mtx); 4369 return (EOPNOTSUPP); 4370 } 4371 mtx_unlock(&nmp->nm_mtx); 4372 4373 cred = ap->a_cred; 4374 if (cred == NULL) 4375 cred = td->td_ucred; 4376 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4377 attrflag = 0; 4378 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva, 4379 &attrflag, cred, td); 4380 if (attrflag != 0) { 4381 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4382 if (error == 0 && ret != 0) 4383 error = ret; 4384 } 4385 if (error == 0 && ap->a_size != NULL) 4386 *ap->a_size = len; 4387 4388 switch (error) { 4389 case NFSERR_NOTSUPP: 4390 case NFSERR_OPILLEGAL: 4391 mtx_lock(&nmp->nm_mtx); 4392 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4393 mtx_unlock(&nmp->nm_mtx); 4394 error = EOPNOTSUPP; 4395 break; 4396 case NFSERR_NOXATTR: 4397 case NFSERR_XATTR2BIG: 4398 error = ENOATTR; 4399 break; 4400 default: 4401 error = nfscl_maperr(td, error, 0, 0); 4402 break; 4403 } 4404 return (error); 4405 } 4406 4407 /* 4408 * nfs setextattr call 4409 */ 4410 static int 4411 nfs_setextattr(struct vop_setextattr_args *ap) 4412 { 4413 struct vnode *vp = ap->a_vp; 4414 struct nfsmount *nmp; 4415 struct ucred *cred; 4416 struct thread *td = ap->a_td; 4417 struct nfsvattr nfsva; 4418 int attrflag, error, ret; 4419 4420 nmp = VFSTONFS(vp->v_mount); 4421 mtx_lock(&nmp->nm_mtx); 4422 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4423 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4424 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4425 mtx_unlock(&nmp->nm_mtx); 4426 return (EOPNOTSUPP); 4427 } 4428 mtx_unlock(&nmp->nm_mtx); 4429 4430 if (ap->a_uio->uio_resid < 0) 4431 return (EINVAL); 4432 cred = ap->a_cred; 4433 if (cred == NULL) 4434 cred = td->td_ucred; 4435 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4436 attrflag = 0; 4437 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva, 4438 &attrflag, cred, td); 4439 if (attrflag != 0) { 4440 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4441 if (error == 0 && ret != 0) 4442 error = ret; 4443 } 4444 4445 switch (error) { 4446 case NFSERR_NOTSUPP: 4447 case NFSERR_OPILLEGAL: 4448 mtx_lock(&nmp->nm_mtx); 4449 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4450 mtx_unlock(&nmp->nm_mtx); 4451 error = EOPNOTSUPP; 4452 break; 4453 case NFSERR_NOXATTR: 4454 case NFSERR_XATTR2BIG: 4455 error = ENOATTR; 4456 break; 4457 default: 4458 error = nfscl_maperr(td, error, 0, 0); 4459 break; 4460 } 4461 return (error); 4462 } 4463 4464 /* 4465 * nfs listextattr call 4466 */ 4467 static int 4468 nfs_listextattr(struct vop_listextattr_args *ap) 4469 { 4470 struct vnode *vp = ap->a_vp; 4471 struct nfsmount *nmp; 4472 struct ucred *cred; 4473 struct thread *td = ap->a_td; 4474 struct nfsvattr nfsva; 4475 size_t len, len2; 4476 uint64_t cookie; 4477 int attrflag, error, ret; 4478 bool eof; 4479 4480 nmp = VFSTONFS(vp->v_mount); 4481 mtx_lock(&nmp->nm_mtx); 4482 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4483 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4484 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4485 mtx_unlock(&nmp->nm_mtx); 4486 return (EOPNOTSUPP); 4487 } 4488 mtx_unlock(&nmp->nm_mtx); 4489 4490 cred = ap->a_cred; 4491 if (cred == NULL) 4492 cred = td->td_ucred; 4493 4494 /* Loop around doing List Extended Attribute RPCs. */ 4495 eof = false; 4496 cookie = 0; 4497 len2 = 0; 4498 error = 0; 4499 while (!eof && error == 0) { 4500 len = nmp->nm_rsize; 4501 attrflag = 0; 4502 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof, 4503 &nfsva, &attrflag, cred, td); 4504 if (attrflag != 0) { 4505 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4506 if (error == 0 && ret != 0) 4507 error = ret; 4508 } 4509 if (error == 0) { 4510 len2 += len; 4511 if (len2 > SSIZE_MAX) 4512 error = ENOATTR; 4513 } 4514 } 4515 if (error == 0 && ap->a_size != NULL) 4516 *ap->a_size = len2; 4517 4518 switch (error) { 4519 case NFSERR_NOTSUPP: 4520 case NFSERR_OPILLEGAL: 4521 mtx_lock(&nmp->nm_mtx); 4522 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4523 mtx_unlock(&nmp->nm_mtx); 4524 error = EOPNOTSUPP; 4525 break; 4526 case NFSERR_NOXATTR: 4527 case NFSERR_XATTR2BIG: 4528 error = ENOATTR; 4529 break; 4530 default: 4531 error = nfscl_maperr(td, error, 0, 0); 4532 break; 4533 } 4534 return (error); 4535 } 4536 4537 /* 4538 * nfs setextattr call 4539 */ 4540 static int 4541 nfs_deleteextattr(struct vop_deleteextattr_args *ap) 4542 { 4543 struct vnode *vp = ap->a_vp; 4544 struct nfsmount *nmp; 4545 struct nfsvattr nfsva; 4546 int attrflag, error, ret; 4547 4548 nmp = VFSTONFS(vp->v_mount); 4549 mtx_lock(&nmp->nm_mtx); 4550 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4551 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4552 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4553 mtx_unlock(&nmp->nm_mtx); 4554 return (EOPNOTSUPP); 4555 } 4556 mtx_unlock(&nmp->nm_mtx); 4557 4558 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4559 attrflag = 0; 4560 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred, 4561 ap->a_td); 4562 if (attrflag != 0) { 4563 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4564 if (error == 0 && ret != 0) 4565 error = ret; 4566 } 4567 4568 switch (error) { 4569 case NFSERR_NOTSUPP: 4570 case NFSERR_OPILLEGAL: 4571 mtx_lock(&nmp->nm_mtx); 4572 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4573 mtx_unlock(&nmp->nm_mtx); 4574 error = EOPNOTSUPP; 4575 break; 4576 case NFSERR_NOXATTR: 4577 case NFSERR_XATTR2BIG: 4578 error = ENOATTR; 4579 break; 4580 default: 4581 error = nfscl_maperr(ap->a_td, error, 0, 0); 4582 break; 4583 } 4584 return (error); 4585 } 4586 4587 /* 4588 * Return POSIX pathconf information applicable to nfs filesystems. 4589 */ 4590 static int 4591 nfs_pathconf(struct vop_pathconf_args *ap) 4592 { 4593 struct nfsv3_pathconf pc; 4594 struct nfsvattr nfsva; 4595 struct vnode *vp = ap->a_vp; 4596 struct nfsmount *nmp; 4597 struct thread *td = curthread; 4598 off_t off; 4599 bool eof, has_namedattr, named_enabled; 4600 int attrflag, error; 4601 struct nfsnode *np; 4602 4603 nmp = VFSTONFS(vp->v_mount); 4604 np = VTONFS(vp); 4605 named_enabled = false; 4606 has_namedattr = false; 4607 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX || 4608 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED || 4609 ap->a_name == _PC_NO_TRUNC)) || 4610 (NFS_ISV4(vp) && (ap->a_name == _PC_ACL_NFS4 || 4611 ap->a_name == _PC_HAS_NAMEDATTR))) { 4612 /* 4613 * Since only the above 4 a_names are returned by the NFSv3 4614 * Pathconf RPC, there is no point in doing it for others. 4615 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can 4616 * be used for _PC_ACL_NFS4 and _PC_HAS_NAMEDATTR as well. 4617 */ 4618 error = nfsrpc_pathconf(vp, &pc, &has_namedattr, td->td_ucred, 4619 td, &nfsva, &attrflag); 4620 if (attrflag != 0) 4621 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4622 if (error != 0) 4623 return (error); 4624 } else if (NFS_ISV4(vp) && ap->a_name == _PC_NAMEDATTR_ENABLED && 4625 (np->n_flag & NNAMEDNOTSUPP) == 0) { 4626 struct nfsfh *nfhp; 4627 4628 error = nfsrpc_openattr(nmp, vp, np->n_fhp->nfh_fh, 4629 np->n_fhp->nfh_len, false, td->td_ucred, td, &nfsva, &nfhp, 4630 &attrflag); 4631 named_enabled = true; 4632 if (error == 0) { 4633 free(nfhp, M_NFSFH); 4634 } else if (error == NFSERR_NOTSUPP) { 4635 named_enabled = false; 4636 NFSLOCKNODE(np); 4637 np->n_flag |= NNAMEDNOTSUPP; 4638 NFSUNLOCKNODE(np); 4639 } 4640 error = 0; 4641 } else { 4642 /* 4643 * For NFSv2 (or NFSv3 when not one of the above 4 a_names), 4644 * just fake them. 4645 */ 4646 pc.pc_linkmax = NFS_LINK_MAX; 4647 pc.pc_namemax = NFS_MAXNAMLEN; 4648 pc.pc_notrunc = 1; 4649 pc.pc_chownrestricted = 1; 4650 pc.pc_caseinsensitive = 0; 4651 pc.pc_casepreserving = 1; 4652 error = 0; 4653 } 4654 switch (ap->a_name) { 4655 case _PC_LINK_MAX: 4656 #ifdef _LP64 4657 *ap->a_retval = pc.pc_linkmax; 4658 #else 4659 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax); 4660 #endif 4661 break; 4662 case _PC_NAME_MAX: 4663 *ap->a_retval = pc.pc_namemax; 4664 break; 4665 case _PC_PIPE_BUF: 4666 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) 4667 *ap->a_retval = PIPE_BUF; 4668 else 4669 error = EINVAL; 4670 break; 4671 case _PC_CHOWN_RESTRICTED: 4672 *ap->a_retval = pc.pc_chownrestricted; 4673 break; 4674 case _PC_NO_TRUNC: 4675 *ap->a_retval = pc.pc_notrunc; 4676 break; 4677 case _PC_ACL_NFS4: 4678 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 && 4679 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) 4680 *ap->a_retval = 1; 4681 else 4682 *ap->a_retval = 0; 4683 break; 4684 case _PC_ACL_PATH_MAX: 4685 if (NFS_ISV4(vp)) 4686 *ap->a_retval = ACL_MAX_ENTRIES; 4687 else 4688 *ap->a_retval = 3; 4689 break; 4690 case _PC_PRIO_IO: 4691 *ap->a_retval = 0; 4692 break; 4693 case _PC_SYNC_IO: 4694 *ap->a_retval = 0; 4695 break; 4696 case _PC_ALLOC_SIZE_MIN: 4697 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize; 4698 break; 4699 case _PC_FILESIZEBITS: 4700 if (NFS_ISV34(vp)) 4701 *ap->a_retval = 64; 4702 else 4703 *ap->a_retval = 32; 4704 break; 4705 case _PC_REC_INCR_XFER_SIZE: 4706 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4707 break; 4708 case _PC_REC_MAX_XFER_SIZE: 4709 *ap->a_retval = -1; /* means ``unlimited'' */ 4710 break; 4711 case _PC_REC_MIN_XFER_SIZE: 4712 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4713 break; 4714 case _PC_REC_XFER_ALIGN: 4715 *ap->a_retval = PAGE_SIZE; 4716 break; 4717 case _PC_SYMLINK_MAX: 4718 *ap->a_retval = NFS_MAXPATHLEN; 4719 break; 4720 case _PC_MIN_HOLE_SIZE: 4721 /* Only some NFSv4.2 servers support Seek for Holes. */ 4722 *ap->a_retval = 0; 4723 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) { 4724 /* 4725 * NFSv4.2 doesn't have an attribute for hole size, 4726 * so all we can do is see if the Seek operation is 4727 * supported and then use f_iosize as a "best guess". 4728 */ 4729 mtx_lock(&nmp->nm_mtx); 4730 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) { 4731 mtx_unlock(&nmp->nm_mtx); 4732 off = 0; 4733 attrflag = 0; 4734 error = nfsrpc_seek(vp, &off, &eof, 4735 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva, 4736 &attrflag); 4737 if (attrflag != 0) 4738 (void) nfscl_loadattrcache(&vp, &nfsva, 4739 NULL, 0, 1); 4740 mtx_lock(&nmp->nm_mtx); 4741 if (error == NFSERR_NOTSUPP) 4742 nmp->nm_privflag |= NFSMNTP_SEEKTESTED; 4743 else 4744 nmp->nm_privflag |= NFSMNTP_SEEKTESTED | 4745 NFSMNTP_SEEK; 4746 error = 0; 4747 } 4748 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0) 4749 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4750 mtx_unlock(&nmp->nm_mtx); 4751 } 4752 break; 4753 case _PC_NAMEDATTR_ENABLED: 4754 if (named_enabled) 4755 *ap->a_retval = 1; 4756 else 4757 *ap->a_retval = 0; 4758 break; 4759 case _PC_HAS_NAMEDATTR: 4760 if (has_namedattr) 4761 *ap->a_retval = 1; 4762 else 4763 *ap->a_retval = 0; 4764 break; 4765 case _PC_HAS_HIDDENSYSTEM: 4766 if (NFS_ISV4(vp) && NFSISSET_ATTRBIT(&np->n_vattr.na_suppattr, 4767 NFSATTRBIT_HIDDEN) && 4768 NFSISSET_ATTRBIT(&np->n_vattr.na_suppattr, 4769 NFSATTRBIT_SYSTEM)) 4770 *ap->a_retval = 1; 4771 else 4772 *ap->a_retval = 0; 4773 break; 4774 4775 default: 4776 error = vop_stdpathconf(ap); 4777 break; 4778 } 4779 return (error); 4780 } 4781