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sys/fs/nfsclient/nfs_clvnops.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 /* 41 * vnode op calls for Sun NFS version 2, 3 and 4 42 */ 43 44 #include "opt_inet.h" 45 46 #include <sys/param.h> 47 #include <sys/kernel.h> 48 #include <sys/systm.h> 49 #include <sys/resourcevar.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/bio.h> 53 #include <sys/buf.h> 54 #include <sys/extattr.h> 55 #include <sys/filio.h> 56 #include <sys/jail.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/namei.h> 60 #include <sys/socket.h> 61 #include <sys/vnode.h> 62 #include <sys/dirent.h> 63 #include <sys/fcntl.h> 64 #include <sys/lockf.h> 65 #include <sys/stat.h> 66 #include <sys/sysctl.h> 67 #include <sys/signalvar.h> 68 69 #include <vm/vm.h> 70 #include <vm/vm_extern.h> 71 #include <vm/vm_object.h> 72 73 #include <fs/nfs/nfsport.h> 74 #include <fs/nfsclient/nfsnode.h> 75 #include <fs/nfsclient/nfsmount.h> 76 #include <fs/nfsclient/nfs.h> 77 #include <fs/nfsclient/nfs_kdtrace.h> 78 79 #include <net/if.h> 80 #include <netinet/in.h> 81 #include <netinet/in_var.h> 82 83 #include <nfs/nfs_lock.h> 84 85 #ifdef KDTRACE_HOOKS 86 #include <sys/dtrace_bsd.h> 87 88 dtrace_nfsclient_accesscache_flush_probe_func_t 89 dtrace_nfscl_accesscache_flush_done_probe; 90 uint32_t nfscl_accesscache_flush_done_id; 91 92 dtrace_nfsclient_accesscache_get_probe_func_t 93 dtrace_nfscl_accesscache_get_hit_probe, 94 dtrace_nfscl_accesscache_get_miss_probe; 95 uint32_t nfscl_accesscache_get_hit_id; 96 uint32_t nfscl_accesscache_get_miss_id; 97 98 dtrace_nfsclient_accesscache_load_probe_func_t 99 dtrace_nfscl_accesscache_load_done_probe; 100 uint32_t nfscl_accesscache_load_done_id; 101 #endif /* !KDTRACE_HOOKS */ 102 103 /* Defs */ 104 #define TRUE 1 105 #define FALSE 0 106 107 extern struct nfsstatsv1 nfsstatsv1; 108 extern int nfsrv_useacl; 109 extern int nfscl_debuglevel; 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 vop_lookup_t nfs_lookup; 118 static vop_create_t nfs_create; 119 static vop_mknod_t nfs_mknod; 120 static vop_open_t nfs_open; 121 static vop_pathconf_t nfs_pathconf; 122 static vop_close_t nfs_close; 123 static vop_access_t nfs_access; 124 static vop_getattr_t nfs_getattr; 125 static vop_setattr_t nfs_setattr; 126 static vop_read_t nfs_read; 127 static vop_fsync_t nfs_fsync; 128 static vop_remove_t nfs_remove; 129 static vop_link_t nfs_link; 130 static vop_rename_t nfs_rename; 131 static vop_mkdir_t nfs_mkdir; 132 static vop_rmdir_t nfs_rmdir; 133 static vop_symlink_t nfs_symlink; 134 static vop_readdir_t nfs_readdir; 135 static vop_strategy_t nfs_strategy; 136 static int nfs_lookitup(struct vnode *, char *, int, 137 struct ucred *, struct thread *, struct nfsnode **); 138 static int nfs_sillyrename(struct vnode *, struct vnode *, 139 struct componentname *); 140 static vop_access_t nfsspec_access; 141 static vop_readlink_t nfs_readlink; 142 static vop_print_t nfs_print; 143 static vop_advlock_t nfs_advlock; 144 static vop_advlockasync_t nfs_advlockasync; 145 static vop_getacl_t nfs_getacl; 146 static vop_setacl_t nfs_setacl; 147 static vop_advise_t nfs_advise; 148 static vop_allocate_t nfs_allocate; 149 static vop_deallocate_t nfs_deallocate; 150 static vop_copy_file_range_t nfs_copy_file_range; 151 static vop_ioctl_t nfs_ioctl; 152 static vop_getextattr_t nfs_getextattr; 153 static vop_setextattr_t nfs_setextattr; 154 static vop_listextattr_t nfs_listextattr; 155 static vop_deleteextattr_t nfs_deleteextattr; 156 static vop_lock1_t nfs_lock; 157 158 /* 159 * Global vfs data structures for nfs 160 */ 161 162 static struct vop_vector newnfs_vnodeops_nosig = { 163 .vop_default = &default_vnodeops, 164 .vop_access = nfs_access, 165 .vop_advlock = nfs_advlock, 166 .vop_advlockasync = nfs_advlockasync, 167 .vop_close = nfs_close, 168 .vop_create = nfs_create, 169 .vop_fsync = nfs_fsync, 170 .vop_getattr = nfs_getattr, 171 .vop_getpages = ncl_getpages, 172 .vop_putpages = ncl_putpages, 173 .vop_inactive = ncl_inactive, 174 .vop_link = nfs_link, 175 .vop_lock1 = nfs_lock, 176 .vop_lookup = nfs_lookup, 177 .vop_mkdir = nfs_mkdir, 178 .vop_mknod = nfs_mknod, 179 .vop_open = nfs_open, 180 .vop_pathconf = nfs_pathconf, 181 .vop_print = nfs_print, 182 .vop_read = nfs_read, 183 .vop_readdir = nfs_readdir, 184 .vop_readlink = nfs_readlink, 185 .vop_reclaim = ncl_reclaim, 186 .vop_remove = nfs_remove, 187 .vop_rename = nfs_rename, 188 .vop_rmdir = nfs_rmdir, 189 .vop_setattr = nfs_setattr, 190 .vop_strategy = nfs_strategy, 191 .vop_symlink = nfs_symlink, 192 .vop_write = ncl_write, 193 .vop_getacl = nfs_getacl, 194 .vop_setacl = nfs_setacl, 195 .vop_advise = nfs_advise, 196 .vop_allocate = nfs_allocate, 197 .vop_deallocate = nfs_deallocate, 198 .vop_copy_file_range = nfs_copy_file_range, 199 .vop_ioctl = nfs_ioctl, 200 .vop_getextattr = nfs_getextattr, 201 .vop_setextattr = nfs_setextattr, 202 .vop_listextattr = nfs_listextattr, 203 .vop_deleteextattr = nfs_deleteextattr, 204 }; 205 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops_nosig); 206 207 static int 208 nfs_vnodeops_bypass(struct vop_generic_args *a) 209 { 210 211 return (vop_sigdefer(&newnfs_vnodeops_nosig, a)); 212 } 213 214 struct vop_vector newnfs_vnodeops = { 215 .vop_default = &default_vnodeops, 216 .vop_bypass = nfs_vnodeops_bypass, 217 }; 218 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops); 219 220 static struct vop_vector newnfs_fifoops_nosig = { 221 .vop_default = &fifo_specops, 222 .vop_access = nfsspec_access, 223 .vop_close = nfsfifo_close, 224 .vop_fsync = nfs_fsync, 225 .vop_getattr = nfs_getattr, 226 .vop_inactive = ncl_inactive, 227 .vop_pathconf = nfs_pathconf, 228 .vop_print = nfs_print, 229 .vop_read = nfsfifo_read, 230 .vop_reclaim = ncl_reclaim, 231 .vop_setattr = nfs_setattr, 232 .vop_write = nfsfifo_write, 233 }; 234 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops_nosig); 235 236 static int 237 nfs_fifoops_bypass(struct vop_generic_args *a) 238 { 239 240 return (vop_sigdefer(&newnfs_fifoops_nosig, a)); 241 } 242 243 struct vop_vector newnfs_fifoops = { 244 .vop_default = &default_vnodeops, 245 .vop_bypass = nfs_fifoops_bypass, 246 }; 247 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops); 248 249 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, 250 struct componentname *cnp, struct vattr *vap); 251 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 252 int namelen, struct ucred *cred, struct thread *td); 253 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, 254 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp, 255 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td); 256 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp, 257 struct componentname *scnp, struct sillyrename *sp); 258 259 /* 260 * Global variables 261 */ 262 SYSCTL_DECL(_vfs_nfs); 263 264 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; 265 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 266 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 267 268 static int nfs_prime_access_cache = 0; 269 SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW, 270 &nfs_prime_access_cache, 0, 271 "Prime NFS ACCESS cache when fetching attributes"); 272 273 static int newnfs_commit_on_close = 0; 274 SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW, 275 &newnfs_commit_on_close, 0, "write+commit on close, else only write"); 276 277 static int nfs_clean_pages_on_close = 1; 278 SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW, 279 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close"); 280 281 int newnfs_directio_enable = 0; 282 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW, 283 &newnfs_directio_enable, 0, "Enable NFS directio"); 284 285 int nfs_keep_dirty_on_error; 286 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW, 287 &nfs_keep_dirty_on_error, 0, "Retry pageout if error returned"); 288 289 /* 290 * This sysctl allows other processes to mmap a file that has been opened 291 * O_DIRECT by a process. In general, having processes mmap the file while 292 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow 293 * this by default to prevent DoS attacks - to prevent a malicious user from 294 * opening up files O_DIRECT preventing other users from mmap'ing these 295 * files. "Protected" environments where stricter consistency guarantees are 296 * required can disable this knob. The process that opened the file O_DIRECT 297 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not 298 * meaningful. 299 */ 300 int newnfs_directio_allow_mmap = 1; 301 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW, 302 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens"); 303 304 static uint64_t nfs_maxalloclen = 64 * 1024 * 1024; 305 SYSCTL_U64(_vfs_nfs, OID_AUTO, maxalloclen, CTLFLAG_RW, 306 &nfs_maxalloclen, 0, "NFS max allocate/deallocate length"); 307 308 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \ 309 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \ 310 | NFSACCESS_DELETE | NFSACCESS_LOOKUP) 311 312 /* 313 * SMP Locking Note : 314 * The list of locks after the description of the lock is the ordering 315 * of other locks acquired with the lock held. 316 * np->n_mtx : Protects the fields in the nfsnode. 317 VM Object Lock 318 VI_MTX (acquired indirectly) 319 * nmp->nm_mtx : Protects the fields in the nfsmount. 320 rep->r_mtx 321 * ncl_iod_mutex : Global lock, protects shared nfsiod state. 322 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list. 323 nmp->nm_mtx 324 rep->r_mtx 325 * rep->r_mtx : Protects the fields in an nfsreq. 326 */ 327 328 static int 329 nfs_lock(struct vop_lock1_args *ap) 330 { 331 struct vnode *vp; 332 struct nfsnode *np; 333 u_quad_t nsize; 334 int error, lktype; 335 bool onfault; 336 337 vp = ap->a_vp; 338 lktype = ap->a_flags & LK_TYPE_MASK; 339 error = VOP_LOCK1_APV(&default_vnodeops, ap); 340 if (error != 0 || vp->v_op != &newnfs_vnodeops) 341 return (error); 342 np = VTONFS(vp); 343 if (np == NULL) 344 return (0); 345 NFSLOCKNODE(np); 346 if ((np->n_flag & NVNSETSZSKIP) == 0 || (lktype != LK_SHARED && 347 lktype != LK_EXCLUSIVE && lktype != LK_UPGRADE && 348 lktype != LK_TRYUPGRADE)) { 349 NFSUNLOCKNODE(np); 350 return (0); 351 } 352 onfault = (ap->a_flags & LK_EATTR_MASK) == LK_NOWAIT && 353 (ap->a_flags & LK_INIT_MASK) == LK_CANRECURSE && 354 (lktype == LK_SHARED || lktype == LK_EXCLUSIVE); 355 if (onfault && vp->v_vnlock->lk_recurse == 0) { 356 /* 357 * Force retry in vm_fault(), to make the lock request 358 * sleepable, which allows us to piggy-back the 359 * sleepable call to vnode_pager_setsize(). 360 */ 361 NFSUNLOCKNODE(np); 362 VOP_UNLOCK(vp); 363 return (EBUSY); 364 } 365 if ((ap->a_flags & LK_NOWAIT) != 0 || 366 (lktype == LK_SHARED && vp->v_vnlock->lk_recurse > 0)) { 367 NFSUNLOCKNODE(np); 368 return (0); 369 } 370 if (lktype == LK_SHARED) { 371 NFSUNLOCKNODE(np); 372 VOP_UNLOCK(vp); 373 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK); 374 ap->a_flags |= LK_EXCLUSIVE; 375 error = VOP_LOCK1_APV(&default_vnodeops, ap); 376 if (error != 0 || vp->v_op != &newnfs_vnodeops) 377 return (error); 378 if (vp->v_data == NULL) 379 goto downgrade; 380 MPASS(vp->v_data == np); 381 NFSLOCKNODE(np); 382 if ((np->n_flag & NVNSETSZSKIP) == 0) { 383 NFSUNLOCKNODE(np); 384 goto downgrade; 385 } 386 } 387 np->n_flag &= ~NVNSETSZSKIP; 388 nsize = np->n_size; 389 NFSUNLOCKNODE(np); 390 vnode_pager_setsize(vp, nsize); 391 downgrade: 392 if (lktype == LK_SHARED) { 393 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK); 394 ap->a_flags |= LK_DOWNGRADE; 395 (void)VOP_LOCK1_APV(&default_vnodeops, ap); 396 } 397 return (0); 398 } 399 400 static int 401 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td, 402 struct ucred *cred, u_int32_t *retmode) 403 { 404 int error = 0, attrflag, i, lrupos; 405 u_int32_t rmode; 406 struct nfsnode *np = VTONFS(vp); 407 struct nfsvattr nfsva; 408 409 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag, 410 &rmode); 411 if (attrflag) 412 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 413 if (!error) { 414 lrupos = 0; 415 NFSLOCKNODE(np); 416 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 417 if (np->n_accesscache[i].uid == cred->cr_uid) { 418 np->n_accesscache[i].mode = rmode; 419 np->n_accesscache[i].stamp = time_second; 420 break; 421 } 422 if (i > 0 && np->n_accesscache[i].stamp < 423 np->n_accesscache[lrupos].stamp) 424 lrupos = i; 425 } 426 if (i == NFS_ACCESSCACHESIZE) { 427 np->n_accesscache[lrupos].uid = cred->cr_uid; 428 np->n_accesscache[lrupos].mode = rmode; 429 np->n_accesscache[lrupos].stamp = time_second; 430 } 431 NFSUNLOCKNODE(np); 432 if (retmode != NULL) 433 *retmode = rmode; 434 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0); 435 } else if (NFS_ISV4(vp)) { 436 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 437 } 438 #ifdef KDTRACE_HOOKS 439 if (error != 0) 440 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0, 441 error); 442 #endif 443 return (error); 444 } 445 446 /* 447 * nfs access vnode op. 448 * For nfs version 2, just return ok. File accesses may fail later. 449 * For nfs version 3, use the access rpc to check accessibility. If file modes 450 * are changed on the server, accesses might still fail later. 451 */ 452 static int 453 nfs_access(struct vop_access_args *ap) 454 { 455 struct vnode *vp = ap->a_vp; 456 int error = 0, i, gotahit; 457 u_int32_t mode, wmode, rmode; 458 int v34 = NFS_ISV34(vp); 459 struct nfsnode *np = VTONFS(vp); 460 461 /* 462 * Disallow write attempts on filesystems mounted read-only; 463 * unless the file is a socket, fifo, or a block or character 464 * device resident on the filesystem. 465 */ 466 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS | 467 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL | 468 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 469 switch (vp->v_type) { 470 case VREG: 471 case VDIR: 472 case VLNK: 473 return (EROFS); 474 default: 475 break; 476 } 477 } 478 /* 479 * For nfs v3 or v4, check to see if we have done this recently, and if 480 * so return our cached result instead of making an ACCESS call. 481 * If not, do an access rpc, otherwise you are stuck emulating 482 * ufs_access() locally using the vattr. This may not be correct, 483 * since the server may apply other access criteria such as 484 * client uid-->server uid mapping that we do not know about. 485 */ 486 if (v34) { 487 if (ap->a_accmode & VREAD) 488 mode = NFSACCESS_READ; 489 else 490 mode = 0; 491 if (vp->v_type != VDIR) { 492 if (ap->a_accmode & VWRITE) 493 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 494 if (ap->a_accmode & VAPPEND) 495 mode |= NFSACCESS_EXTEND; 496 if (ap->a_accmode & VEXEC) 497 mode |= NFSACCESS_EXECUTE; 498 if (ap->a_accmode & VDELETE) 499 mode |= NFSACCESS_DELETE; 500 } else { 501 if (ap->a_accmode & VWRITE) 502 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 503 if (ap->a_accmode & VAPPEND) 504 mode |= NFSACCESS_EXTEND; 505 if (ap->a_accmode & VEXEC) 506 mode |= NFSACCESS_LOOKUP; 507 if (ap->a_accmode & VDELETE) 508 mode |= NFSACCESS_DELETE; 509 if (ap->a_accmode & VDELETE_CHILD) 510 mode |= NFSACCESS_MODIFY; 511 } 512 /* XXX safety belt, only make blanket request if caching */ 513 if (nfsaccess_cache_timeout > 0) { 514 wmode = NFSACCESS_READ | NFSACCESS_MODIFY | 515 NFSACCESS_EXTEND | NFSACCESS_EXECUTE | 516 NFSACCESS_DELETE | NFSACCESS_LOOKUP; 517 } else { 518 wmode = mode; 519 } 520 521 /* 522 * Does our cached result allow us to give a definite yes to 523 * this request? 524 */ 525 gotahit = 0; 526 NFSLOCKNODE(np); 527 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 528 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) { 529 if (time_second < (np->n_accesscache[i].stamp 530 + nfsaccess_cache_timeout) && 531 (np->n_accesscache[i].mode & mode) == mode) { 532 NFSINCRGLOBAL(nfsstatsv1.accesscache_hits); 533 gotahit = 1; 534 } 535 break; 536 } 537 } 538 NFSUNLOCKNODE(np); 539 #ifdef KDTRACE_HOOKS 540 if (gotahit != 0) 541 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp, 542 ap->a_cred->cr_uid, mode); 543 else 544 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp, 545 ap->a_cred->cr_uid, mode); 546 #endif 547 if (gotahit == 0) { 548 /* 549 * Either a no, or a don't know. Go to the wire. 550 */ 551 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses); 552 error = nfs34_access_otw(vp, wmode, ap->a_td, 553 ap->a_cred, &rmode); 554 if (!error && 555 (rmode & mode) != mode) 556 error = EACCES; 557 } 558 return (error); 559 } else { 560 if ((error = nfsspec_access(ap)) != 0) { 561 return (error); 562 } 563 /* 564 * Attempt to prevent a mapped root from accessing a file 565 * which it shouldn't. We try to read a byte from the file 566 * if the user is root and the file is not zero length. 567 * After calling nfsspec_access, we should have the correct 568 * file size cached. 569 */ 570 NFSLOCKNODE(np); 571 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD) 572 && VTONFS(vp)->n_size > 0) { 573 struct iovec aiov; 574 struct uio auio; 575 char buf[1]; 576 577 NFSUNLOCKNODE(np); 578 aiov.iov_base = buf; 579 aiov.iov_len = 1; 580 auio.uio_iov = &aiov; 581 auio.uio_iovcnt = 1; 582 auio.uio_offset = 0; 583 auio.uio_resid = 1; 584 auio.uio_segflg = UIO_SYSSPACE; 585 auio.uio_rw = UIO_READ; 586 auio.uio_td = ap->a_td; 587 588 if (vp->v_type == VREG) 589 error = ncl_readrpc(vp, &auio, ap->a_cred); 590 else if (vp->v_type == VDIR) { 591 char* bp; 592 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 593 aiov.iov_base = bp; 594 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 595 error = ncl_readdirrpc(vp, &auio, ap->a_cred, 596 ap->a_td); 597 free(bp, M_TEMP); 598 } else if (vp->v_type == VLNK) 599 error = ncl_readlinkrpc(vp, &auio, ap->a_cred); 600 else 601 error = EACCES; 602 } else 603 NFSUNLOCKNODE(np); 604 return (error); 605 } 606 } 607 608 /* 609 * nfs open vnode op 610 * Check to see if the type is ok 611 * and that deletion is not in progress. 612 * For paged in text files, you will need to flush the page cache 613 * if consistency is lost. 614 */ 615 /* ARGSUSED */ 616 static int 617 nfs_open(struct vop_open_args *ap) 618 { 619 struct vnode *vp = ap->a_vp; 620 struct nfsnode *np = VTONFS(vp); 621 struct vattr vattr; 622 int error; 623 int fmode = ap->a_mode; 624 struct ucred *cred; 625 vm_object_t obj; 626 627 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 628 return (EOPNOTSUPP); 629 630 /* 631 * For NFSv4, we need to do the Open Op before cache validation, 632 * so that we conform to RFC3530 Sec. 9.3.1. 633 */ 634 if (NFS_ISV4(vp)) { 635 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td); 636 if (error) { 637 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 638 (gid_t)0); 639 return (error); 640 } 641 } 642 643 /* 644 * Now, if this Open will be doing reading, re-validate/flush the 645 * cache, so that Close/Open coherency is maintained. 646 */ 647 NFSLOCKNODE(np); 648 if (np->n_flag & NMODIFIED) { 649 NFSUNLOCKNODE(np); 650 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 651 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 652 if (VN_IS_DOOMED(vp)) 653 return (EBADF); 654 } 655 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 656 if (error == EINTR || error == EIO) { 657 if (NFS_ISV4(vp)) 658 (void) nfsrpc_close(vp, 0, ap->a_td); 659 return (error); 660 } 661 NFSLOCKNODE(np); 662 np->n_attrstamp = 0; 663 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 664 if (vp->v_type == VDIR) 665 np->n_direofoffset = 0; 666 NFSUNLOCKNODE(np); 667 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 668 if (error) { 669 if (NFS_ISV4(vp)) 670 (void) nfsrpc_close(vp, 0, ap->a_td); 671 return (error); 672 } 673 NFSLOCKNODE(np); 674 np->n_mtime = vattr.va_mtime; 675 if (NFS_ISV4(vp)) 676 np->n_change = vattr.va_filerev; 677 } else { 678 NFSUNLOCKNODE(np); 679 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 680 if (error) { 681 if (NFS_ISV4(vp)) 682 (void) nfsrpc_close(vp, 0, ap->a_td); 683 return (error); 684 } 685 NFSLOCKNODE(np); 686 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) || 687 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 688 if (vp->v_type == VDIR) 689 np->n_direofoffset = 0; 690 NFSUNLOCKNODE(np); 691 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 692 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 693 if (VN_IS_DOOMED(vp)) 694 return (EBADF); 695 } 696 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 697 if (error == EINTR || error == EIO) { 698 if (NFS_ISV4(vp)) 699 (void) nfsrpc_close(vp, 0, ap->a_td); 700 return (error); 701 } 702 NFSLOCKNODE(np); 703 np->n_mtime = vattr.va_mtime; 704 if (NFS_ISV4(vp)) 705 np->n_change = vattr.va_filerev; 706 } 707 } 708 709 /* 710 * If the object has >= 1 O_DIRECT active opens, we disable caching. 711 */ 712 if (newnfs_directio_enable && (fmode & O_DIRECT) && 713 (vp->v_type == VREG)) { 714 if (np->n_directio_opens == 0) { 715 NFSUNLOCKNODE(np); 716 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 717 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 718 if (VN_IS_DOOMED(vp)) 719 return (EBADF); 720 } 721 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 722 if (error) { 723 if (NFS_ISV4(vp)) 724 (void) nfsrpc_close(vp, 0, ap->a_td); 725 return (error); 726 } 727 NFSLOCKNODE(np); 728 np->n_flag |= NNONCACHE; 729 } 730 np->n_directio_opens++; 731 } 732 733 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */ 734 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0) 735 np->n_flag |= NWRITEOPENED; 736 737 /* 738 * If this is an open for writing, capture a reference to the 739 * credentials, so they can be used by ncl_putpages(). Using 740 * these write credentials is preferable to the credentials of 741 * whatever thread happens to be doing the VOP_PUTPAGES() since 742 * the write RPCs are less likely to fail with EACCES. 743 */ 744 if ((fmode & FWRITE) != 0) { 745 cred = np->n_writecred; 746 np->n_writecred = crhold(ap->a_cred); 747 } else 748 cred = NULL; 749 NFSUNLOCKNODE(np); 750 751 if (cred != NULL) 752 crfree(cred); 753 vnode_create_vobject(vp, vattr.va_size, ap->a_td); 754 755 /* 756 * If the text file has been mmap'd, flush any dirty pages to the 757 * buffer cache and then... 758 * Make sure all writes are pushed to the NFS server. If this is not 759 * done, the modify time of the file can change while the text 760 * file is being executed. This will cause the process that is 761 * executing the text file to be terminated. 762 */ 763 if (vp->v_writecount <= -1) { 764 if ((obj = vp->v_object) != NULL && 765 vm_object_mightbedirty(obj)) { 766 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 767 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 768 if (VN_IS_DOOMED(vp)) 769 return (EBADF); 770 } 771 VM_OBJECT_WLOCK(obj); 772 vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); 773 VM_OBJECT_WUNLOCK(obj); 774 } 775 776 /* Now, flush the buffer cache. */ 777 ncl_flush(vp, MNT_WAIT, curthread, 0, 0); 778 779 /* And, finally, make sure that n_mtime is up to date. */ 780 np = VTONFS(vp); 781 NFSLOCKNODE(np); 782 np->n_mtime = np->n_vattr.na_mtime; 783 NFSUNLOCKNODE(np); 784 } 785 return (0); 786 } 787 788 /* 789 * nfs close vnode op 790 * What an NFS client should do upon close after writing is a debatable issue. 791 * Most NFS clients push delayed writes to the server upon close, basically for 792 * two reasons: 793 * 1 - So that any write errors may be reported back to the client process 794 * doing the close system call. By far the two most likely errors are 795 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 796 * 2 - To put a worst case upper bound on cache inconsistency between 797 * multiple clients for the file. 798 * There is also a consistency problem for Version 2 of the protocol w.r.t. 799 * not being able to tell if other clients are writing a file concurrently, 800 * since there is no way of knowing if the changed modify time in the reply 801 * is only due to the write for this client. 802 * (NFS Version 3 provides weak cache consistency data in the reply that 803 * should be sufficient to detect and handle this case.) 804 * 805 * The current code does the following: 806 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 807 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 808 * or commit them (this satisfies 1 and 2 except for the 809 * case where the server crashes after this close but 810 * before the commit RPC, which is felt to be "good 811 * enough". Changing the last argument to ncl_flush() to 812 * a 1 would force a commit operation, if it is felt a 813 * commit is necessary now. 814 * for NFS Version 4 - flush the dirty buffers and commit them, if 815 * nfscl_mustflush() says this is necessary. 816 * It is necessary if there is no write delegation held, 817 * in order to satisfy open/close coherency. 818 * If the file isn't cached on local stable storage, 819 * it may be necessary in order to detect "out of space" 820 * errors from the server, if the write delegation 821 * issued by the server doesn't allow the file to grow. 822 */ 823 /* ARGSUSED */ 824 static int 825 nfs_close(struct vop_close_args *ap) 826 { 827 struct vnode *vp = ap->a_vp; 828 struct nfsnode *np = VTONFS(vp); 829 struct nfsvattr nfsva; 830 struct ucred *cred; 831 int error = 0, ret, localcred = 0; 832 int fmode = ap->a_fflag; 833 834 if (NFSCL_FORCEDISM(vp->v_mount)) 835 return (0); 836 /* 837 * During shutdown, a_cred isn't valid, so just use root. 838 */ 839 if (ap->a_cred == NOCRED) { 840 cred = newnfs_getcred(); 841 localcred = 1; 842 } else { 843 cred = ap->a_cred; 844 } 845 if (vp->v_type == VREG) { 846 /* 847 * Examine and clean dirty pages, regardless of NMODIFIED. 848 * This closes a major hole in close-to-open consistency. 849 * We want to push out all dirty pages (and buffers) on 850 * close, regardless of whether they were dirtied by 851 * mmap'ed writes or via write(). 852 */ 853 if (nfs_clean_pages_on_close && vp->v_object) { 854 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 855 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 856 if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK) 857 return (EBADF); 858 } 859 VM_OBJECT_WLOCK(vp->v_object); 860 vm_object_page_clean(vp->v_object, 0, 0, 0); 861 VM_OBJECT_WUNLOCK(vp->v_object); 862 } 863 NFSLOCKNODE(np); 864 if (np->n_flag & NMODIFIED) { 865 NFSUNLOCKNODE(np); 866 if (NFS_ISV3(vp)) { 867 /* 868 * Under NFSv3 we have dirty buffers to dispose of. We 869 * must flush them to the NFS server. We have the option 870 * of waiting all the way through the commit rpc or just 871 * waiting for the initial write. The default is to only 872 * wait through the initial write so the data is in the 873 * server's cache, which is roughly similar to the state 874 * a standard disk subsystem leaves the file in on close(). 875 * 876 * We cannot clear the NMODIFIED bit in np->n_flag due to 877 * potential races with other processes, and certainly 878 * cannot clear it if we don't commit. 879 * These races occur when there is no longer the old 880 * traditional vnode locking implemented for Vnode Ops. 881 */ 882 int cm = newnfs_commit_on_close ? 1 : 0; 883 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 884 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 885 if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK) 886 return (EBADF); 887 } 888 error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0); 889 /* np->n_flag &= ~NMODIFIED; */ 890 } else if (NFS_ISV4(vp)) { 891 if (nfscl_mustflush(vp) != 0) { 892 int cm = newnfs_commit_on_close ? 1 : 0; 893 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 894 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 895 if (VN_IS_DOOMED(vp) && ap->a_fflag != 896 FNONBLOCK) 897 return (EBADF); 898 } 899 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 900 cm, 0); 901 /* 902 * as above w.r.t races when clearing 903 * NMODIFIED. 904 * np->n_flag &= ~NMODIFIED; 905 */ 906 } 907 } else { 908 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 909 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 910 if (VN_IS_DOOMED(vp) && ap->a_fflag != 911 FNONBLOCK) 912 return (EBADF); 913 } 914 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 915 } 916 NFSLOCKNODE(np); 917 } 918 /* 919 * Invalidate the attribute cache in all cases. 920 * An open is going to fetch fresh attrs any way, other procs 921 * on this node that have file open will be forced to do an 922 * otw attr fetch, but this is safe. 923 * --> A user found that their RPC count dropped by 20% when 924 * this was commented out and I can't see any requirement 925 * for it, so I've disabled it when negative lookups are 926 * enabled. (What does this have to do with negative lookup 927 * caching? Well nothing, except it was reported by the 928 * same user that needed negative lookup caching and I wanted 929 * there to be a way to disable it to see if it 930 * is the cause of some caching/coherency issue that might 931 * crop up.) 932 */ 933 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) { 934 np->n_attrstamp = 0; 935 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 936 } 937 if (np->n_flag & NWRITEERR) { 938 np->n_flag &= ~NWRITEERR; 939 error = np->n_error; 940 } 941 NFSUNLOCKNODE(np); 942 } 943 944 if (NFS_ISV4(vp)) { 945 /* 946 * Get attributes so "change" is up to date. 947 */ 948 if (error == 0 && nfscl_mustflush(vp) != 0 && 949 vp->v_type == VREG && 950 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) == 0) { 951 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva); 952 if (!ret) { 953 np->n_change = nfsva.na_filerev; 954 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 955 0, 0); 956 } 957 } 958 959 /* 960 * and do the close. 961 */ 962 ret = nfsrpc_close(vp, 0, ap->a_td); 963 if (!error && ret) 964 error = ret; 965 if (error) 966 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 967 (gid_t)0); 968 } 969 if (newnfs_directio_enable) 970 KASSERT((np->n_directio_asyncwr == 0), 971 ("nfs_close: dirty unflushed (%d) directio buffers\n", 972 np->n_directio_asyncwr)); 973 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { 974 NFSLOCKNODE(np); 975 KASSERT((np->n_directio_opens > 0), 976 ("nfs_close: unexpectedly value (0) of n_directio_opens\n")); 977 np->n_directio_opens--; 978 if (np->n_directio_opens == 0) 979 np->n_flag &= ~NNONCACHE; 980 NFSUNLOCKNODE(np); 981 } 982 if (localcred) 983 NFSFREECRED(cred); 984 return (error); 985 } 986 987 /* 988 * nfs getattr call from vfs. 989 */ 990 static int 991 nfs_getattr(struct vop_getattr_args *ap) 992 { 993 struct vnode *vp = ap->a_vp; 994 struct thread *td = curthread; /* XXX */ 995 struct nfsnode *np = VTONFS(vp); 996 int error = 0; 997 struct nfsvattr nfsva; 998 struct vattr *vap = ap->a_vap; 999 struct vattr vattr; 1000 1001 /* 1002 * Update local times for special files. 1003 */ 1004 NFSLOCKNODE(np); 1005 if (np->n_flag & (NACC | NUPD)) 1006 np->n_flag |= NCHG; 1007 NFSUNLOCKNODE(np); 1008 /* 1009 * First look in the cache. 1010 */ 1011 if (ncl_getattrcache(vp, &vattr) == 0) { 1012 ncl_copy_vattr(vap, &vattr); 1013 1014 /* 1015 * Get the local modify time for the case of a write 1016 * delegation. 1017 */ 1018 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1019 return (0); 1020 } 1021 1022 if (NFS_ISV34(vp) && nfs_prime_access_cache && 1023 nfsaccess_cache_timeout > 0) { 1024 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses); 1025 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL); 1026 if (ncl_getattrcache(vp, ap->a_vap) == 0) { 1027 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime); 1028 return (0); 1029 } 1030 } 1031 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva); 1032 if (!error) 1033 error = nfscl_loadattrcache(&vp, &nfsva, vap, 0, 0); 1034 if (!error) { 1035 /* 1036 * Get the local modify time for the case of a write 1037 * delegation. 1038 */ 1039 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1040 } else if (NFS_ISV4(vp)) { 1041 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1042 } 1043 return (error); 1044 } 1045 1046 /* 1047 * nfs setattr call. 1048 */ 1049 static int 1050 nfs_setattr(struct vop_setattr_args *ap) 1051 { 1052 struct vnode *vp = ap->a_vp; 1053 struct nfsnode *np = VTONFS(vp); 1054 struct thread *td = curthread; /* XXX */ 1055 struct vattr *vap = ap->a_vap; 1056 int error = 0; 1057 u_quad_t tsize; 1058 struct timespec ts; 1059 1060 #ifndef nolint 1061 tsize = (u_quad_t)0; 1062 #endif 1063 1064 /* 1065 * Setting of flags and marking of atimes are not supported. 1066 */ 1067 if (vap->va_flags != VNOVAL) 1068 return (EOPNOTSUPP); 1069 1070 /* 1071 * Disallow write attempts if the filesystem is mounted read-only. 1072 */ 1073 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 1074 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 1075 vap->va_mtime.tv_sec != VNOVAL || 1076 vap->va_birthtime.tv_sec != VNOVAL || 1077 vap->va_mode != (mode_t)VNOVAL) && 1078 (vp->v_mount->mnt_flag & MNT_RDONLY)) 1079 return (EROFS); 1080 if (vap->va_size != VNOVAL) { 1081 switch (vp->v_type) { 1082 case VDIR: 1083 return (EISDIR); 1084 case VCHR: 1085 case VBLK: 1086 case VSOCK: 1087 case VFIFO: 1088 if (vap->va_mtime.tv_sec == VNOVAL && 1089 vap->va_atime.tv_sec == VNOVAL && 1090 vap->va_birthtime.tv_sec == VNOVAL && 1091 vap->va_mode == (mode_t)VNOVAL && 1092 vap->va_uid == (uid_t)VNOVAL && 1093 vap->va_gid == (gid_t)VNOVAL) 1094 return (0); 1095 vap->va_size = VNOVAL; 1096 break; 1097 default: 1098 /* 1099 * Disallow write attempts if the filesystem is 1100 * mounted read-only. 1101 */ 1102 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1103 return (EROFS); 1104 /* 1105 * We run vnode_pager_setsize() early (why?), 1106 * we must set np->n_size now to avoid vinvalbuf 1107 * V_SAVE races that might setsize a lower 1108 * value. 1109 */ 1110 NFSLOCKNODE(np); 1111 tsize = np->n_size; 1112 NFSUNLOCKNODE(np); 1113 error = ncl_meta_setsize(vp, td, vap->va_size); 1114 NFSLOCKNODE(np); 1115 if (np->n_flag & NMODIFIED) { 1116 tsize = np->n_size; 1117 NFSUNLOCKNODE(np); 1118 error = ncl_vinvalbuf(vp, vap->va_size == 0 ? 1119 0 : V_SAVE, td, 1); 1120 if (error != 0) { 1121 vnode_pager_setsize(vp, tsize); 1122 return (error); 1123 } 1124 /* 1125 * Call nfscl_delegmodtime() to set the modify time 1126 * locally, as required. 1127 */ 1128 nfscl_delegmodtime(vp); 1129 } else 1130 NFSUNLOCKNODE(np); 1131 /* 1132 * np->n_size has already been set to vap->va_size 1133 * in ncl_meta_setsize(). We must set it again since 1134 * nfs_loadattrcache() could be called through 1135 * ncl_meta_setsize() and could modify np->n_size. 1136 */ 1137 NFSLOCKNODE(np); 1138 np->n_vattr.na_size = np->n_size = vap->va_size; 1139 NFSUNLOCKNODE(np); 1140 } 1141 } else { 1142 NFSLOCKNODE(np); 1143 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && 1144 (np->n_flag & NMODIFIED) && vp->v_type == VREG) { 1145 NFSUNLOCKNODE(np); 1146 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 1147 if (error == EINTR || error == EIO) 1148 return (error); 1149 } else 1150 NFSUNLOCKNODE(np); 1151 } 1152 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 1153 if (vap->va_size != VNOVAL) { 1154 if (error == 0) { 1155 nanouptime(&ts); 1156 NFSLOCKNODE(np); 1157 np->n_localmodtime = ts; 1158 NFSUNLOCKNODE(np); 1159 } else { 1160 NFSLOCKNODE(np); 1161 np->n_size = np->n_vattr.na_size = tsize; 1162 vnode_pager_setsize(vp, tsize); 1163 NFSUNLOCKNODE(np); 1164 } 1165 } 1166 return (error); 1167 } 1168 1169 /* 1170 * Do an nfs setattr rpc. 1171 */ 1172 static int 1173 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, 1174 struct thread *td) 1175 { 1176 struct nfsnode *np = VTONFS(vp); 1177 int error, ret, attrflag, i; 1178 struct nfsvattr nfsva; 1179 1180 if (NFS_ISV34(vp)) { 1181 NFSLOCKNODE(np); 1182 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 1183 np->n_accesscache[i].stamp = 0; 1184 np->n_flag |= NDELEGMOD; 1185 NFSUNLOCKNODE(np); 1186 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp); 1187 } 1188 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag); 1189 if (attrflag) { 1190 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1191 if (ret && !error) 1192 error = ret; 1193 } 1194 if (error && NFS_ISV4(vp)) 1195 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid); 1196 return (error); 1197 } 1198 1199 /* 1200 * nfs lookup call, one step at a time... 1201 * First look in cache 1202 * If not found, unlock the directory nfsnode and do the rpc 1203 */ 1204 static int 1205 nfs_lookup(struct vop_lookup_args *ap) 1206 { 1207 struct componentname *cnp = ap->a_cnp; 1208 struct vnode *dvp = ap->a_dvp; 1209 struct vnode **vpp = ap->a_vpp; 1210 struct mount *mp = dvp->v_mount; 1211 int flags = cnp->cn_flags; 1212 struct vnode *newvp; 1213 struct nfsmount *nmp; 1214 struct nfsnode *np, *newnp; 1215 int error = 0, attrflag, dattrflag, ltype, ncticks; 1216 struct thread *td = curthread; 1217 struct nfsfh *nfhp; 1218 struct nfsvattr dnfsva, nfsva; 1219 struct vattr vattr; 1220 struct timespec nctime, ts; 1221 uint32_t openmode; 1222 1223 *vpp = NULLVP; 1224 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) && 1225 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 1226 return (EROFS); 1227 if (dvp->v_type != VDIR) 1228 return (ENOTDIR); 1229 nmp = VFSTONFS(mp); 1230 np = VTONFS(dvp); 1231 1232 /* For NFSv4, wait until any remove is done. */ 1233 NFSLOCKNODE(np); 1234 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) { 1235 np->n_flag |= NREMOVEWANT; 1236 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0); 1237 } 1238 NFSUNLOCKNODE(np); 1239 1240 error = vn_dir_check_exec(dvp, cnp); 1241 if (error != 0) 1242 return (error); 1243 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks); 1244 if (error > 0 && error != ENOENT) 1245 return (error); 1246 if (error == -1) { 1247 /* 1248 * Lookups of "." are special and always return the 1249 * current directory. cache_lookup() already handles 1250 * associated locking bookkeeping, etc. 1251 */ 1252 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 1253 return (0); 1254 } 1255 1256 /* 1257 * We only accept a positive hit in the cache if the 1258 * change time of the file matches our cached copy. 1259 * Otherwise, we discard the cache entry and fallback 1260 * to doing a lookup RPC. We also only trust cache 1261 * entries for less than nm_nametimeo seconds. 1262 * 1263 * To better handle stale file handles and attributes, 1264 * clear the attribute cache of this node if it is a 1265 * leaf component, part of an open() call, and not 1266 * locally modified before fetching the attributes. 1267 * This should allow stale file handles to be detected 1268 * here where we can fall back to a LOOKUP RPC to 1269 * recover rather than having nfs_open() detect the 1270 * stale file handle and failing open(2) with ESTALE. 1271 */ 1272 newvp = *vpp; 1273 newnp = VTONFS(newvp); 1274 if (!(nmp->nm_flag & NFSMNT_NOCTO) && 1275 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1276 !(newnp->n_flag & NMODIFIED)) { 1277 NFSLOCKNODE(newnp); 1278 newnp->n_attrstamp = 0; 1279 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1280 NFSUNLOCKNODE(newnp); 1281 } 1282 if (nfscl_nodeleg(newvp, 0) == 0 || 1283 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) && 1284 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 && 1285 timespeccmp(&vattr.va_ctime, &nctime, ==))) { 1286 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1287 return (0); 1288 } 1289 cache_purge(newvp); 1290 if (dvp != newvp) 1291 vput(newvp); 1292 else 1293 vrele(newvp); 1294 *vpp = NULLVP; 1295 } else if (error == ENOENT) { 1296 if (VN_IS_DOOMED(dvp)) 1297 return (ENOENT); 1298 /* 1299 * We only accept a negative hit in the cache if the 1300 * modification time of the parent directory matches 1301 * the cached copy in the name cache entry. 1302 * Otherwise, we discard all of the negative cache 1303 * entries for this directory. We also only trust 1304 * negative cache entries for up to nm_negnametimeo 1305 * seconds. 1306 */ 1307 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) && 1308 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 && 1309 timespeccmp(&vattr.va_mtime, &nctime, ==)) { 1310 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1311 return (ENOENT); 1312 } 1313 cache_purge_negative(dvp); 1314 } 1315 1316 openmode = 0; 1317 /* 1318 * If this an NFSv4.1/4.2 mount using the "oneopenown" mount 1319 * option, it is possible to do the Open operation in the same 1320 * compound as Lookup, so long as delegations are not being 1321 * issued. This saves doing a separate RPC for Open. 1322 * For pnfs, do not do this, since the Open+LayoutGet will 1323 * be needed as a separate RPC. 1324 */ 1325 NFSLOCKMNT(nmp); 1326 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && !NFSHASPNFS(nmp) && 1327 (nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 && 1328 (!NFSMNT_RDONLY(mp) || (flags & OPENWRITE) == 0) && 1329 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN)) { 1330 if ((flags & OPENREAD) != 0) 1331 openmode |= NFSV4OPEN_ACCESSREAD; 1332 if ((flags & OPENWRITE) != 0) 1333 openmode |= NFSV4OPEN_ACCESSWRITE; 1334 } 1335 NFSUNLOCKMNT(nmp); 1336 1337 newvp = NULLVP; 1338 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses); 1339 nanouptime(&ts); 1340 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1341 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1342 openmode); 1343 if (dattrflag) 1344 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1345 if (error) { 1346 if (newvp != NULLVP) { 1347 vput(newvp); 1348 *vpp = NULLVP; 1349 } 1350 1351 if (error != ENOENT) { 1352 if (NFS_ISV4(dvp)) 1353 error = nfscl_maperr(td, error, (uid_t)0, 1354 (gid_t)0); 1355 return (error); 1356 } 1357 1358 /* The requested file was not found. */ 1359 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1360 (flags & ISLASTCN)) { 1361 /* 1362 * XXX: UFS does a full VOP_ACCESS(dvp, 1363 * VWRITE) here instead of just checking 1364 * MNT_RDONLY. 1365 */ 1366 if (mp->mnt_flag & MNT_RDONLY) 1367 return (EROFS); 1368 return (EJUSTRETURN); 1369 } 1370 1371 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) { 1372 /* 1373 * Cache the modification time of the parent 1374 * directory from the post-op attributes in 1375 * the name cache entry. The negative cache 1376 * entry will be ignored once the directory 1377 * has changed. Don't bother adding the entry 1378 * if the directory has already changed. 1379 */ 1380 NFSLOCKNODE(np); 1381 if (timespeccmp(&np->n_vattr.na_mtime, 1382 &dnfsva.na_mtime, ==)) { 1383 NFSUNLOCKNODE(np); 1384 cache_enter_time(dvp, NULL, cnp, 1385 &dnfsva.na_mtime, NULL); 1386 } else 1387 NFSUNLOCKNODE(np); 1388 } 1389 return (ENOENT); 1390 } 1391 1392 /* 1393 * Handle RENAME case... 1394 */ 1395 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 1396 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1397 free(nfhp, M_NFSFH); 1398 return (EISDIR); 1399 } 1400 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, LK_EXCLUSIVE); 1401 if (error) 1402 return (error); 1403 newvp = NFSTOV(np); 1404 /* 1405 * If n_localmodtime >= time before RPC, then 1406 * a file modification operation, such as 1407 * VOP_SETATTR() of size, has occurred while 1408 * the Lookup RPC and acquisition of the vnode 1409 * happened. As such, the attributes might 1410 * be stale, with possibly an incorrect size. 1411 */ 1412 NFSLOCKNODE(np); 1413 if (timespecisset(&np->n_localmodtime) && 1414 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1415 NFSCL_DEBUG(4, "nfs_lookup: rename localmod " 1416 "stale attributes\n"); 1417 attrflag = 0; 1418 } 1419 NFSUNLOCKNODE(np); 1420 if (attrflag) 1421 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1422 *vpp = newvp; 1423 return (0); 1424 } 1425 1426 if (flags & ISDOTDOT) { 1427 ltype = NFSVOPISLOCKED(dvp); 1428 error = vfs_busy(mp, MBF_NOWAIT); 1429 if (error != 0) { 1430 vfs_ref(mp); 1431 NFSVOPUNLOCK(dvp); 1432 error = vfs_busy(mp, 0); 1433 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1434 vfs_rel(mp); 1435 if (error == 0 && VN_IS_DOOMED(dvp)) { 1436 vfs_unbusy(mp); 1437 error = ENOENT; 1438 } 1439 if (error != 0) 1440 return (error); 1441 } 1442 NFSVOPUNLOCK(dvp); 1443 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1444 cnp->cn_lkflags); 1445 if (error == 0) 1446 newvp = NFSTOV(np); 1447 vfs_unbusy(mp); 1448 if (newvp != dvp) 1449 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1450 if (VN_IS_DOOMED(dvp)) { 1451 if (error == 0) { 1452 if (newvp == dvp) 1453 vrele(newvp); 1454 else 1455 vput(newvp); 1456 } 1457 error = ENOENT; 1458 } 1459 if (error != 0) 1460 return (error); 1461 if (attrflag) 1462 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1463 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1464 free(nfhp, M_NFSFH); 1465 VREF(dvp); 1466 newvp = dvp; 1467 if (attrflag) 1468 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1469 } else { 1470 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1471 cnp->cn_lkflags); 1472 if (error) 1473 return (error); 1474 newvp = NFSTOV(np); 1475 /* 1476 * If n_localmodtime >= time before RPC, then 1477 * a file modification operation, such as 1478 * VOP_SETATTR() of size, has occurred while 1479 * the Lookup RPC and acquisition of the vnode 1480 * happened. As such, the attributes might 1481 * be stale, with possibly an incorrect size. 1482 */ 1483 NFSLOCKNODE(np); 1484 if (timespecisset(&np->n_localmodtime) && 1485 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1486 NFSCL_DEBUG(4, "nfs_lookup: localmod " 1487 "stale attributes\n"); 1488 attrflag = 0; 1489 } 1490 NFSUNLOCKNODE(np); 1491 if (attrflag) 1492 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1493 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1494 !(np->n_flag & NMODIFIED)) { 1495 /* 1496 * Flush the attribute cache when opening a 1497 * leaf node to ensure that fresh attributes 1498 * are fetched in nfs_open() since we did not 1499 * fetch attributes from the LOOKUP reply. 1500 */ 1501 NFSLOCKNODE(np); 1502 np->n_attrstamp = 0; 1503 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1504 NFSUNLOCKNODE(np); 1505 } 1506 } 1507 if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp && 1508 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) && 1509 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0)) 1510 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 1511 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime); 1512 *vpp = newvp; 1513 return (0); 1514 } 1515 1516 /* 1517 * nfs read call. 1518 * Just call ncl_bioread() to do the work. 1519 */ 1520 static int 1521 nfs_read(struct vop_read_args *ap) 1522 { 1523 struct vnode *vp = ap->a_vp; 1524 1525 switch (vp->v_type) { 1526 case VREG: 1527 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 1528 case VDIR: 1529 return (EISDIR); 1530 default: 1531 return (EOPNOTSUPP); 1532 } 1533 } 1534 1535 /* 1536 * nfs readlink call 1537 */ 1538 static int 1539 nfs_readlink(struct vop_readlink_args *ap) 1540 { 1541 struct vnode *vp = ap->a_vp; 1542 1543 if (vp->v_type != VLNK) 1544 return (EINVAL); 1545 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred)); 1546 } 1547 1548 /* 1549 * Do a readlink rpc. 1550 * Called by ncl_doio() from below the buffer cache. 1551 */ 1552 int 1553 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1554 { 1555 int error, ret, attrflag; 1556 struct nfsvattr nfsva; 1557 1558 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva, 1559 &attrflag); 1560 if (attrflag) { 1561 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1562 if (ret && !error) 1563 error = ret; 1564 } 1565 if (error && NFS_ISV4(vp)) 1566 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1567 return (error); 1568 } 1569 1570 /* 1571 * nfs read rpc call 1572 * Ditto above 1573 */ 1574 int 1575 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1576 { 1577 int error, ret, attrflag; 1578 struct nfsvattr nfsva; 1579 struct nfsmount *nmp; 1580 1581 nmp = VFSTONFS(vp->v_mount); 1582 error = EIO; 1583 attrflag = 0; 1584 if (NFSHASPNFS(nmp)) 1585 error = nfscl_doiods(vp, uiop, NULL, NULL, 1586 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td); 1587 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error); 1588 if (error != 0) 1589 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, 1590 &attrflag); 1591 if (attrflag) { 1592 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1593 if (ret && !error) 1594 error = ret; 1595 } 1596 if (error && NFS_ISV4(vp)) 1597 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1598 return (error); 1599 } 1600 1601 /* 1602 * nfs write call 1603 */ 1604 int 1605 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 1606 int *iomode, int *must_commit, int called_from_strategy, int ioflag) 1607 { 1608 struct nfsvattr nfsva; 1609 int error, attrflag, ret; 1610 struct nfsmount *nmp; 1611 1612 nmp = VFSTONFS(vp->v_mount); 1613 error = EIO; 1614 attrflag = 0; 1615 if (NFSHASPNFS(nmp)) 1616 error = nfscl_doiods(vp, uiop, iomode, must_commit, 1617 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td); 1618 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error); 1619 if (error != 0) 1620 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred, 1621 uiop->uio_td, &nfsva, &attrflag, called_from_strategy, 1622 ioflag); 1623 if (attrflag) { 1624 if (VTONFS(vp)->n_flag & ND_NFSV4) 1625 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 1, 1); 1626 else 1627 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1628 if (ret && !error) 1629 error = ret; 1630 } 1631 if (DOINGASYNC(vp)) 1632 *iomode = NFSWRITE_FILESYNC; 1633 if (error && NFS_ISV4(vp)) 1634 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1635 return (error); 1636 } 1637 1638 /* 1639 * nfs mknod rpc 1640 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1641 * mode set to specify the file type and the size field for rdev. 1642 */ 1643 static int 1644 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1645 struct vattr *vap) 1646 { 1647 struct nfsvattr nfsva, dnfsva; 1648 struct vnode *newvp = NULL; 1649 struct nfsnode *np = NULL, *dnp; 1650 struct nfsfh *nfhp; 1651 struct vattr vattr; 1652 int error = 0, attrflag, dattrflag; 1653 u_int32_t rdev; 1654 1655 if (vap->va_type == VCHR || vap->va_type == VBLK) 1656 rdev = vap->va_rdev; 1657 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1658 rdev = 0xffffffff; 1659 else 1660 return (EOPNOTSUPP); 1661 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1662 return (error); 1663 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap, 1664 rdev, vap->va_type, cnp->cn_cred, curthread, &dnfsva, 1665 &nfsva, &nfhp, &attrflag, &dattrflag); 1666 if (!error) { 1667 if (!nfhp) 1668 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1669 cnp->cn_namelen, cnp->cn_cred, curthread, 1670 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1671 if (nfhp) 1672 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1673 curthread, &np, LK_EXCLUSIVE); 1674 } 1675 if (dattrflag) 1676 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1677 if (!error) { 1678 newvp = NFSTOV(np); 1679 if (attrflag != 0) { 1680 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1681 if (error != 0) 1682 vput(newvp); 1683 } 1684 } 1685 if (!error) { 1686 *vpp = newvp; 1687 } else if (NFS_ISV4(dvp)) { 1688 error = nfscl_maperr(curthread, error, vap->va_uid, 1689 vap->va_gid); 1690 } 1691 dnp = VTONFS(dvp); 1692 NFSLOCKNODE(dnp); 1693 dnp->n_flag |= NMODIFIED; 1694 if (!dattrflag) { 1695 dnp->n_attrstamp = 0; 1696 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1697 } 1698 NFSUNLOCKNODE(dnp); 1699 return (error); 1700 } 1701 1702 /* 1703 * nfs mknod vop 1704 * just call nfs_mknodrpc() to do the work. 1705 */ 1706 /* ARGSUSED */ 1707 static int 1708 nfs_mknod(struct vop_mknod_args *ap) 1709 { 1710 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap)); 1711 } 1712 1713 static struct mtx nfs_cverf_mtx; 1714 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex", 1715 MTX_DEF); 1716 1717 static nfsquad_t 1718 nfs_get_cverf(void) 1719 { 1720 static nfsquad_t cverf; 1721 nfsquad_t ret; 1722 static int cverf_initialized = 0; 1723 1724 mtx_lock(&nfs_cverf_mtx); 1725 if (cverf_initialized == 0) { 1726 cverf.lval[0] = arc4random(); 1727 cverf.lval[1] = arc4random(); 1728 cverf_initialized = 1; 1729 } else 1730 cverf.qval++; 1731 ret = cverf; 1732 mtx_unlock(&nfs_cverf_mtx); 1733 1734 return (ret); 1735 } 1736 1737 /* 1738 * nfs file create call 1739 */ 1740 static int 1741 nfs_create(struct vop_create_args *ap) 1742 { 1743 struct vnode *dvp = ap->a_dvp; 1744 struct vattr *vap = ap->a_vap; 1745 struct componentname *cnp = ap->a_cnp; 1746 struct nfsnode *np = NULL, *dnp; 1747 struct vnode *newvp = NULL; 1748 struct nfsmount *nmp; 1749 struct nfsvattr dnfsva, nfsva; 1750 struct nfsfh *nfhp; 1751 nfsquad_t cverf; 1752 int error = 0, attrflag, dattrflag, fmode = 0; 1753 struct vattr vattr; 1754 1755 /* 1756 * Oops, not for me.. 1757 */ 1758 if (vap->va_type == VSOCK) 1759 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1760 1761 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1762 return (error); 1763 if (vap->va_vaflags & VA_EXCLUSIVE) 1764 fmode |= O_EXCL; 1765 dnp = VTONFS(dvp); 1766 nmp = VFSTONFS(dvp->v_mount); 1767 again: 1768 /* For NFSv4, wait until any remove is done. */ 1769 NFSLOCKNODE(dnp); 1770 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) { 1771 dnp->n_flag |= NREMOVEWANT; 1772 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0); 1773 } 1774 NFSUNLOCKNODE(dnp); 1775 1776 cverf = nfs_get_cverf(); 1777 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1778 vap, cverf, fmode, cnp->cn_cred, curthread, &dnfsva, &nfsva, 1779 &nfhp, &attrflag, &dattrflag); 1780 if (!error) { 1781 if (nfhp == NULL) 1782 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1783 cnp->cn_namelen, cnp->cn_cred, curthread, 1784 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1785 if (nfhp != NULL) 1786 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1787 curthread, &np, LK_EXCLUSIVE); 1788 } 1789 if (dattrflag) 1790 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1791 if (!error) { 1792 newvp = NFSTOV(np); 1793 if (attrflag == 0) 1794 error = nfsrpc_getattr(newvp, cnp->cn_cred, curthread, 1795 &nfsva); 1796 if (error == 0) 1797 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1798 } 1799 if (error) { 1800 if (newvp != NULL) { 1801 vput(newvp); 1802 newvp = NULL; 1803 } 1804 if (NFS_ISV34(dvp) && (fmode & O_EXCL) && 1805 error == NFSERR_NOTSUPP) { 1806 fmode &= ~O_EXCL; 1807 goto again; 1808 } 1809 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) { 1810 if (nfscl_checksattr(vap, &nfsva)) { 1811 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred, 1812 curthread, &nfsva, &attrflag); 1813 if (error && (vap->va_uid != (uid_t)VNOVAL || 1814 vap->va_gid != (gid_t)VNOVAL)) { 1815 /* try again without setting uid/gid */ 1816 vap->va_uid = (uid_t)VNOVAL; 1817 vap->va_gid = (uid_t)VNOVAL; 1818 error = nfsrpc_setattr(newvp, vap, NULL, 1819 cnp->cn_cred, curthread, &nfsva, &attrflag); 1820 } 1821 if (attrflag) 1822 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1823 0, 1); 1824 if (error != 0) 1825 vput(newvp); 1826 } 1827 } 1828 if (!error) { 1829 if ((cnp->cn_flags & MAKEENTRY) && attrflag) { 1830 if (dvp != newvp) 1831 cache_enter_time(dvp, newvp, cnp, 1832 &nfsva.na_ctime, NULL); 1833 else 1834 printf("nfs_create: bogus NFS server returned " 1835 "the directory as the new file object\n"); 1836 } 1837 *ap->a_vpp = newvp; 1838 } else if (NFS_ISV4(dvp)) { 1839 error = nfscl_maperr(curthread, error, vap->va_uid, 1840 vap->va_gid); 1841 } 1842 NFSLOCKNODE(dnp); 1843 dnp->n_flag |= NMODIFIED; 1844 if (!dattrflag) { 1845 dnp->n_attrstamp = 0; 1846 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1847 } 1848 NFSUNLOCKNODE(dnp); 1849 return (error); 1850 } 1851 1852 /* 1853 * nfs file remove call 1854 * To try and make nfs semantics closer to ufs semantics, a file that has 1855 * other processes using the vnode is renamed instead of removed and then 1856 * removed later on the last close. 1857 * - If v_usecount > 1 1858 * If a rename is not already in the works 1859 * call nfs_sillyrename() to set it up 1860 * else 1861 * do the remove rpc 1862 */ 1863 static int 1864 nfs_remove(struct vop_remove_args *ap) 1865 { 1866 struct vnode *vp = ap->a_vp; 1867 struct vnode *dvp = ap->a_dvp; 1868 struct componentname *cnp = ap->a_cnp; 1869 struct nfsnode *np = VTONFS(vp); 1870 int error = 0; 1871 struct vattr vattr; 1872 1873 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount")); 1874 if (vp->v_type == VDIR) 1875 error = EPERM; 1876 else if (vrefcnt(vp) == 1 || (np->n_sillyrename && 1877 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && 1878 vattr.va_nlink > 1)) { 1879 /* 1880 * Purge the name cache so that the chance of a lookup for 1881 * the name succeeding while the remove is in progress is 1882 * minimized. Without node locking it can still happen, such 1883 * that an I/O op returns ESTALE, but since you get this if 1884 * another host removes the file.. 1885 */ 1886 cache_purge(vp); 1887 /* 1888 * throw away biocache buffers, mainly to avoid 1889 * unnecessary delayed writes later. 1890 */ 1891 error = ncl_vinvalbuf(vp, 0, curthread, 1); 1892 if (error != EINTR && error != EIO) 1893 /* Do the rpc */ 1894 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr, 1895 cnp->cn_namelen, cnp->cn_cred, curthread); 1896 /* 1897 * Kludge City: If the first reply to the remove rpc is lost.. 1898 * the reply to the retransmitted request will be ENOENT 1899 * since the file was in fact removed 1900 * Therefore, we cheat and return success. 1901 */ 1902 if (error == ENOENT) 1903 error = 0; 1904 } else if (!np->n_sillyrename) 1905 error = nfs_sillyrename(dvp, vp, cnp); 1906 NFSLOCKNODE(np); 1907 np->n_attrstamp = 0; 1908 NFSUNLOCKNODE(np); 1909 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 1910 return (error); 1911 } 1912 1913 /* 1914 * nfs file remove rpc called from nfs_inactive 1915 */ 1916 int 1917 ncl_removeit(struct sillyrename *sp, struct vnode *vp) 1918 { 1919 /* 1920 * Make sure that the directory vnode is still valid. 1921 * XXX we should lock sp->s_dvp here. 1922 */ 1923 if (sp->s_dvp->v_type == VBAD) 1924 return (0); 1925 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen, 1926 sp->s_cred, NULL)); 1927 } 1928 1929 /* 1930 * Nfs remove rpc, called from nfs_remove() and ncl_removeit(). 1931 */ 1932 static int 1933 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 1934 int namelen, struct ucred *cred, struct thread *td) 1935 { 1936 struct nfsvattr dnfsva; 1937 struct nfsnode *dnp = VTONFS(dvp); 1938 int error = 0, dattrflag; 1939 1940 NFSLOCKNODE(dnp); 1941 dnp->n_flag |= NREMOVEINPROG; 1942 NFSUNLOCKNODE(dnp); 1943 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva, 1944 &dattrflag); 1945 NFSLOCKNODE(dnp); 1946 if ((dnp->n_flag & NREMOVEWANT)) { 1947 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG); 1948 NFSUNLOCKNODE(dnp); 1949 wakeup((caddr_t)dnp); 1950 } else { 1951 dnp->n_flag &= ~NREMOVEINPROG; 1952 NFSUNLOCKNODE(dnp); 1953 } 1954 if (dattrflag) 1955 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1956 NFSLOCKNODE(dnp); 1957 dnp->n_flag |= NMODIFIED; 1958 if (!dattrflag) { 1959 dnp->n_attrstamp = 0; 1960 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1961 } 1962 NFSUNLOCKNODE(dnp); 1963 if (error && NFS_ISV4(dvp)) 1964 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1965 return (error); 1966 } 1967 1968 /* 1969 * nfs file rename call 1970 */ 1971 static int 1972 nfs_rename(struct vop_rename_args *ap) 1973 { 1974 struct vnode *fvp = ap->a_fvp; 1975 struct vnode *tvp = ap->a_tvp; 1976 struct vnode *fdvp = ap->a_fdvp; 1977 struct vnode *tdvp = ap->a_tdvp; 1978 struct componentname *tcnp = ap->a_tcnp; 1979 struct componentname *fcnp = ap->a_fcnp; 1980 struct nfsnode *fnp = VTONFS(ap->a_fvp); 1981 struct nfsnode *tdnp = VTONFS(ap->a_tdvp); 1982 struct nfsv4node *newv4 = NULL; 1983 int error; 1984 1985 /* Check for cross-device rename */ 1986 if ((fvp->v_mount != tdvp->v_mount) || 1987 (tvp && (fvp->v_mount != tvp->v_mount))) { 1988 error = EXDEV; 1989 goto out; 1990 } 1991 1992 if (fvp == tvp) { 1993 printf("nfs_rename: fvp == tvp (can't happen)\n"); 1994 error = 0; 1995 goto out; 1996 } 1997 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0) 1998 goto out; 1999 2000 /* 2001 * We have to flush B_DELWRI data prior to renaming 2002 * the file. If we don't, the delayed-write buffers 2003 * can be flushed out later after the file has gone stale 2004 * under NFSV3. NFSV2 does not have this problem because 2005 * ( as far as I can tell ) it flushes dirty buffers more 2006 * often. 2007 * 2008 * Skip the rename operation if the fsync fails, this can happen 2009 * due to the server's volume being full, when we pushed out data 2010 * that was written back to our cache earlier. Not checking for 2011 * this condition can result in potential (silent) data loss. 2012 */ 2013 error = VOP_FSYNC(fvp, MNT_WAIT, curthread); 2014 NFSVOPUNLOCK(fvp); 2015 if (!error && tvp) 2016 error = VOP_FSYNC(tvp, MNT_WAIT, curthread); 2017 if (error) 2018 goto out; 2019 2020 /* 2021 * If the tvp exists and is in use, sillyrename it before doing the 2022 * rename of the new file over it. 2023 * XXX Can't sillyrename a directory. 2024 */ 2025 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && 2026 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 2027 vput(tvp); 2028 tvp = NULL; 2029 } 2030 2031 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2032 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2033 curthread); 2034 2035 if (error == 0 && NFS_ISV4(tdvp)) { 2036 /* 2037 * For NFSv4, check to see if it is the same name and 2038 * replace the name, if it is different. 2039 */ 2040 newv4 = malloc( 2041 sizeof (struct nfsv4node) + 2042 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1, 2043 M_NFSV4NODE, M_WAITOK); 2044 NFSLOCKNODE(tdnp); 2045 NFSLOCKNODE(fnp); 2046 if (fnp->n_v4 != NULL && fvp->v_type == VREG && 2047 (fnp->n_v4->n4_namelen != tcnp->cn_namelen || 2048 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4), 2049 tcnp->cn_namelen) || 2050 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen || 2051 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2052 tdnp->n_fhp->nfh_len))) { 2053 #ifdef notdef 2054 { char nnn[100]; int nnnl; 2055 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99; 2056 bcopy(tcnp->cn_nameptr, nnn, nnnl); 2057 nnn[nnnl] = '\0'; 2058 printf("ren replace=%s\n",nnn); 2059 } 2060 #endif 2061 free(fnp->n_v4, M_NFSV4NODE); 2062 fnp->n_v4 = newv4; 2063 newv4 = NULL; 2064 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len; 2065 fnp->n_v4->n4_namelen = tcnp->cn_namelen; 2066 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2067 tdnp->n_fhp->nfh_len); 2068 NFSBCOPY(tcnp->cn_nameptr, 2069 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen); 2070 } 2071 NFSUNLOCKNODE(tdnp); 2072 NFSUNLOCKNODE(fnp); 2073 if (newv4 != NULL) 2074 free(newv4, M_NFSV4NODE); 2075 } 2076 2077 if (fvp->v_type == VDIR) { 2078 if (tvp != NULL && tvp->v_type == VDIR) 2079 cache_purge(tdvp); 2080 cache_purge(fdvp); 2081 } 2082 2083 out: 2084 if (tdvp == tvp) 2085 vrele(tdvp); 2086 else 2087 vput(tdvp); 2088 if (tvp) 2089 vput(tvp); 2090 vrele(fdvp); 2091 vrele(fvp); 2092 /* 2093 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2094 */ 2095 if (error == ENOENT) 2096 error = 0; 2097 return (error); 2098 } 2099 2100 /* 2101 * nfs file rename rpc called from nfs_remove() above 2102 */ 2103 static int 2104 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp, 2105 struct sillyrename *sp) 2106 { 2107 2108 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen, 2109 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred, 2110 curthread)); 2111 } 2112 2113 /* 2114 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2115 */ 2116 static int 2117 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr, 2118 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr, 2119 int tnamelen, struct ucred *cred, struct thread *td) 2120 { 2121 struct nfsvattr fnfsva, tnfsva; 2122 struct nfsnode *fdnp = VTONFS(fdvp); 2123 struct nfsnode *tdnp = VTONFS(tdvp); 2124 int error = 0, fattrflag, tattrflag; 2125 2126 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp, 2127 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag, 2128 &tattrflag); 2129 NFSLOCKNODE(fdnp); 2130 fdnp->n_flag |= NMODIFIED; 2131 if (fattrflag != 0) { 2132 NFSUNLOCKNODE(fdnp); 2133 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, 0, 1); 2134 } else { 2135 fdnp->n_attrstamp = 0; 2136 NFSUNLOCKNODE(fdnp); 2137 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp); 2138 } 2139 NFSLOCKNODE(tdnp); 2140 tdnp->n_flag |= NMODIFIED; 2141 if (tattrflag != 0) { 2142 NFSUNLOCKNODE(tdnp); 2143 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, 0, 1); 2144 } else { 2145 tdnp->n_attrstamp = 0; 2146 NFSUNLOCKNODE(tdnp); 2147 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2148 } 2149 if (error && NFS_ISV4(fdvp)) 2150 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2151 return (error); 2152 } 2153 2154 /* 2155 * nfs hard link create call 2156 */ 2157 static int 2158 nfs_link(struct vop_link_args *ap) 2159 { 2160 struct vnode *vp = ap->a_vp; 2161 struct vnode *tdvp = ap->a_tdvp; 2162 struct componentname *cnp = ap->a_cnp; 2163 struct nfsnode *np, *tdnp; 2164 struct nfsvattr nfsva, dnfsva; 2165 int error = 0, attrflag, dattrflag; 2166 2167 /* 2168 * Push all writes to the server, so that the attribute cache 2169 * doesn't get "out of sync" with the server. 2170 * XXX There should be a better way! 2171 */ 2172 VOP_FSYNC(vp, MNT_WAIT, curthread); 2173 2174 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2175 cnp->cn_cred, curthread, &dnfsva, &nfsva, &attrflag, &dattrflag); 2176 tdnp = VTONFS(tdvp); 2177 NFSLOCKNODE(tdnp); 2178 tdnp->n_flag |= NMODIFIED; 2179 if (dattrflag != 0) { 2180 NFSUNLOCKNODE(tdnp); 2181 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, 0, 1); 2182 } else { 2183 tdnp->n_attrstamp = 0; 2184 NFSUNLOCKNODE(tdnp); 2185 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2186 } 2187 if (attrflag) 2188 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2189 else { 2190 np = VTONFS(vp); 2191 NFSLOCKNODE(np); 2192 np->n_attrstamp = 0; 2193 NFSUNLOCKNODE(np); 2194 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 2195 } 2196 /* 2197 * If negative lookup caching is enabled, I might as well 2198 * add an entry for this node. Not necessary for correctness, 2199 * but if negative caching is enabled, then the system 2200 * must care about lookup caching hit rate, so... 2201 */ 2202 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 && 2203 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2204 if (tdvp != vp) 2205 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL); 2206 else 2207 printf("nfs_link: bogus NFS server returned " 2208 "the directory as the new link\n"); 2209 } 2210 if (error && NFS_ISV4(vp)) 2211 error = nfscl_maperr(curthread, error, (uid_t)0, 2212 (gid_t)0); 2213 return (error); 2214 } 2215 2216 /* 2217 * nfs symbolic link create call 2218 */ 2219 static int 2220 nfs_symlink(struct vop_symlink_args *ap) 2221 { 2222 struct vnode *dvp = ap->a_dvp; 2223 struct vattr *vap = ap->a_vap; 2224 struct componentname *cnp = ap->a_cnp; 2225 struct nfsvattr nfsva, dnfsva; 2226 struct nfsfh *nfhp; 2227 struct nfsnode *np = NULL, *dnp; 2228 struct vnode *newvp = NULL; 2229 int error = 0, attrflag, dattrflag, ret; 2230 2231 vap->va_type = VLNK; 2232 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2233 ap->a_target, vap, cnp->cn_cred, curthread, &dnfsva, 2234 &nfsva, &nfhp, &attrflag, &dattrflag); 2235 if (nfhp) { 2236 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2237 &np, LK_EXCLUSIVE); 2238 if (!ret) 2239 newvp = NFSTOV(np); 2240 else if (!error) 2241 error = ret; 2242 } 2243 if (newvp != NULL) { 2244 if (attrflag) 2245 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 2246 } else if (!error) { 2247 /* 2248 * If we do not have an error and we could not extract the 2249 * newvp from the response due to the request being NFSv2, we 2250 * have to do a lookup in order to obtain a newvp to return. 2251 */ 2252 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2253 cnp->cn_cred, curthread, &np); 2254 if (!error) 2255 newvp = NFSTOV(np); 2256 } 2257 if (error) { 2258 if (newvp) 2259 vput(newvp); 2260 if (NFS_ISV4(dvp)) 2261 error = nfscl_maperr(curthread, error, 2262 vap->va_uid, vap->va_gid); 2263 } else { 2264 *ap->a_vpp = newvp; 2265 } 2266 2267 dnp = VTONFS(dvp); 2268 NFSLOCKNODE(dnp); 2269 dnp->n_flag |= NMODIFIED; 2270 if (dattrflag != 0) { 2271 NFSUNLOCKNODE(dnp); 2272 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2273 } else { 2274 dnp->n_attrstamp = 0; 2275 NFSUNLOCKNODE(dnp); 2276 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2277 } 2278 /* 2279 * If negative lookup caching is enabled, I might as well 2280 * add an entry for this node. Not necessary for correctness, 2281 * but if negative caching is enabled, then the system 2282 * must care about lookup caching hit rate, so... 2283 */ 2284 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2285 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2286 if (dvp != newvp) 2287 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 2288 NULL); 2289 else 2290 printf("nfs_symlink: bogus NFS server returned " 2291 "the directory as the new file object\n"); 2292 } 2293 return (error); 2294 } 2295 2296 /* 2297 * nfs make dir call 2298 */ 2299 static int 2300 nfs_mkdir(struct vop_mkdir_args *ap) 2301 { 2302 struct vnode *dvp = ap->a_dvp; 2303 struct vattr *vap = ap->a_vap; 2304 struct componentname *cnp = ap->a_cnp; 2305 struct nfsnode *np = NULL, *dnp; 2306 struct vnode *newvp = NULL; 2307 struct vattr vattr; 2308 struct nfsfh *nfhp; 2309 struct nfsvattr nfsva, dnfsva; 2310 int error = 0, attrflag, dattrflag, ret; 2311 2312 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) 2313 return (error); 2314 vap->va_type = VDIR; 2315 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2316 vap, cnp->cn_cred, curthread, &dnfsva, &nfsva, &nfhp, 2317 &attrflag, &dattrflag); 2318 dnp = VTONFS(dvp); 2319 NFSLOCKNODE(dnp); 2320 dnp->n_flag |= NMODIFIED; 2321 if (dattrflag != 0) { 2322 NFSUNLOCKNODE(dnp); 2323 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2324 } else { 2325 dnp->n_attrstamp = 0; 2326 NFSUNLOCKNODE(dnp); 2327 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2328 } 2329 if (nfhp) { 2330 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2331 &np, LK_EXCLUSIVE); 2332 if (!ret) { 2333 newvp = NFSTOV(np); 2334 if (attrflag) 2335 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 2336 0, 1); 2337 } else if (!error) 2338 error = ret; 2339 } 2340 if (!error && newvp == NULL) { 2341 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2342 cnp->cn_cred, curthread, &np); 2343 if (!error) { 2344 newvp = NFSTOV(np); 2345 if (newvp->v_type != VDIR) 2346 error = EEXIST; 2347 } 2348 } 2349 if (error) { 2350 if (newvp) 2351 vput(newvp); 2352 if (NFS_ISV4(dvp)) 2353 error = nfscl_maperr(curthread, error, 2354 vap->va_uid, vap->va_gid); 2355 } else { 2356 /* 2357 * If negative lookup caching is enabled, I might as well 2358 * add an entry for this node. Not necessary for correctness, 2359 * but if negative caching is enabled, then the system 2360 * must care about lookup caching hit rate, so... 2361 */ 2362 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2363 (cnp->cn_flags & MAKEENTRY) && 2364 attrflag != 0 && dattrflag != 0) { 2365 if (dvp != newvp) 2366 cache_enter_time(dvp, newvp, cnp, 2367 &nfsva.na_ctime, &dnfsva.na_ctime); 2368 else 2369 printf("nfs_mkdir: bogus NFS server returned " 2370 "the directory that the directory was " 2371 "created in as the new file object\n"); 2372 } 2373 *ap->a_vpp = newvp; 2374 } 2375 return (error); 2376 } 2377 2378 /* 2379 * nfs remove directory call 2380 */ 2381 static int 2382 nfs_rmdir(struct vop_rmdir_args *ap) 2383 { 2384 struct vnode *vp = ap->a_vp; 2385 struct vnode *dvp = ap->a_dvp; 2386 struct componentname *cnp = ap->a_cnp; 2387 struct nfsnode *dnp; 2388 struct nfsvattr dnfsva; 2389 int error, dattrflag; 2390 2391 if (dvp == vp) 2392 return (EINVAL); 2393 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2394 cnp->cn_cred, curthread, &dnfsva, &dattrflag); 2395 dnp = VTONFS(dvp); 2396 NFSLOCKNODE(dnp); 2397 dnp->n_flag |= NMODIFIED; 2398 if (dattrflag != 0) { 2399 NFSUNLOCKNODE(dnp); 2400 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2401 } else { 2402 dnp->n_attrstamp = 0; 2403 NFSUNLOCKNODE(dnp); 2404 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2405 } 2406 2407 cache_purge(dvp); 2408 cache_purge(vp); 2409 if (error && NFS_ISV4(dvp)) 2410 error = nfscl_maperr(curthread, error, (uid_t)0, 2411 (gid_t)0); 2412 /* 2413 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2414 */ 2415 if (error == ENOENT) 2416 error = 0; 2417 return (error); 2418 } 2419 2420 /* 2421 * nfs readdir call 2422 */ 2423 static int 2424 nfs_readdir(struct vop_readdir_args *ap) 2425 { 2426 struct vnode *vp = ap->a_vp; 2427 struct nfsnode *np = VTONFS(vp); 2428 struct uio *uio = ap->a_uio; 2429 ssize_t tresid, left; 2430 int error = 0; 2431 struct vattr vattr; 2432 2433 if (ap->a_eofflag != NULL) 2434 *ap->a_eofflag = 0; 2435 if (vp->v_type != VDIR) 2436 return(EPERM); 2437 2438 /* 2439 * First, check for hit on the EOF offset cache 2440 */ 2441 NFSLOCKNODE(np); 2442 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2443 (np->n_flag & NMODIFIED) == 0) { 2444 NFSUNLOCKNODE(np); 2445 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) { 2446 NFSLOCKNODE(np); 2447 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) || 2448 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 2449 NFSUNLOCKNODE(np); 2450 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits); 2451 if (ap->a_eofflag != NULL) 2452 *ap->a_eofflag = 1; 2453 return (0); 2454 } else 2455 NFSUNLOCKNODE(np); 2456 } 2457 } else 2458 NFSUNLOCKNODE(np); 2459 2460 /* 2461 * NFS always guarantees that directory entries don't straddle 2462 * DIRBLKSIZ boundaries. As such, we need to limit the size 2463 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial 2464 * directory entry. 2465 */ 2466 left = uio->uio_resid % DIRBLKSIZ; 2467 if (left == uio->uio_resid) 2468 return (EINVAL); 2469 uio->uio_resid -= left; 2470 2471 /* 2472 * Call ncl_bioread() to do the real work. 2473 */ 2474 tresid = uio->uio_resid; 2475 error = ncl_bioread(vp, uio, 0, ap->a_cred); 2476 2477 if (!error && uio->uio_resid == tresid) { 2478 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses); 2479 if (ap->a_eofflag != NULL) 2480 *ap->a_eofflag = 1; 2481 } 2482 2483 /* Add the partial DIRBLKSIZ (left) back in. */ 2484 uio->uio_resid += left; 2485 return (error); 2486 } 2487 2488 /* 2489 * Readdir rpc call. 2490 * Called from below the buffer cache by ncl_doio(). 2491 */ 2492 int 2493 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2494 struct thread *td) 2495 { 2496 struct nfsvattr nfsva; 2497 nfsuint64 *cookiep, cookie; 2498 struct nfsnode *dnp = VTONFS(vp); 2499 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2500 int error = 0, eof, attrflag; 2501 2502 KASSERT(uiop->uio_iovcnt == 1 && 2503 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2504 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2505 ("nfs readdirrpc bad uio")); 2506 2507 /* 2508 * If there is no cookie, assume directory was stale. 2509 */ 2510 ncl_dircookie_lock(dnp); 2511 NFSUNLOCKNODE(dnp); 2512 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2513 if (cookiep) { 2514 cookie = *cookiep; 2515 ncl_dircookie_unlock(dnp); 2516 } else { 2517 ncl_dircookie_unlock(dnp); 2518 return (NFSERR_BAD_COOKIE); 2519 } 2520 2521 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2522 (void)ncl_fsinfo(nmp, vp, cred, td); 2523 2524 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva, 2525 &attrflag, &eof); 2526 if (attrflag) 2527 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2528 2529 if (!error) { 2530 /* 2531 * We are now either at the end of the directory or have filled 2532 * the block. 2533 */ 2534 if (eof) { 2535 NFSLOCKNODE(dnp); 2536 dnp->n_direofoffset = uiop->uio_offset; 2537 NFSUNLOCKNODE(dnp); 2538 } else { 2539 if (uiop->uio_resid > 0) 2540 printf("EEK! readdirrpc resid > 0\n"); 2541 ncl_dircookie_lock(dnp); 2542 NFSUNLOCKNODE(dnp); 2543 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2544 *cookiep = cookie; 2545 ncl_dircookie_unlock(dnp); 2546 } 2547 } else if (NFS_ISV4(vp)) { 2548 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2549 } 2550 return (error); 2551 } 2552 2553 /* 2554 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc(). 2555 */ 2556 int 2557 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2558 struct thread *td) 2559 { 2560 struct nfsvattr nfsva; 2561 nfsuint64 *cookiep, cookie; 2562 struct nfsnode *dnp = VTONFS(vp); 2563 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2564 int error = 0, attrflag, eof; 2565 2566 KASSERT(uiop->uio_iovcnt == 1 && 2567 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2568 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2569 ("nfs readdirplusrpc bad uio")); 2570 2571 /* 2572 * If there is no cookie, assume directory was stale. 2573 */ 2574 ncl_dircookie_lock(dnp); 2575 NFSUNLOCKNODE(dnp); 2576 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2577 if (cookiep) { 2578 cookie = *cookiep; 2579 ncl_dircookie_unlock(dnp); 2580 } else { 2581 ncl_dircookie_unlock(dnp); 2582 return (NFSERR_BAD_COOKIE); 2583 } 2584 2585 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2586 (void)ncl_fsinfo(nmp, vp, cred, td); 2587 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva, 2588 &attrflag, &eof); 2589 if (attrflag) 2590 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2591 2592 if (!error) { 2593 /* 2594 * We are now either at end of the directory or have filled the 2595 * the block. 2596 */ 2597 if (eof) { 2598 NFSLOCKNODE(dnp); 2599 dnp->n_direofoffset = uiop->uio_offset; 2600 NFSUNLOCKNODE(dnp); 2601 } else { 2602 if (uiop->uio_resid > 0) 2603 printf("EEK! readdirplusrpc resid > 0\n"); 2604 ncl_dircookie_lock(dnp); 2605 NFSUNLOCKNODE(dnp); 2606 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2607 *cookiep = cookie; 2608 ncl_dircookie_unlock(dnp); 2609 } 2610 } else if (NFS_ISV4(vp)) { 2611 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2612 } 2613 return (error); 2614 } 2615 2616 /* 2617 * Silly rename. To make the NFS filesystem that is stateless look a little 2618 * more like the "ufs" a remove of an active vnode is translated to a rename 2619 * to a funny looking filename that is removed by nfs_inactive on the 2620 * nfsnode. There is the potential for another process on a different client 2621 * to create the same funny name between the nfs_lookitup() fails and the 2622 * nfs_rename() completes, but... 2623 */ 2624 static int 2625 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2626 { 2627 struct sillyrename *sp; 2628 struct nfsnode *np; 2629 int error; 2630 short pid; 2631 unsigned int lticks; 2632 2633 cache_purge(dvp); 2634 np = VTONFS(vp); 2635 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir")); 2636 sp = malloc(sizeof (struct sillyrename), 2637 M_NEWNFSREQ, M_WAITOK); 2638 sp->s_cred = crhold(cnp->cn_cred); 2639 sp->s_dvp = dvp; 2640 VREF(dvp); 2641 2642 /* 2643 * Fudge together a funny name. 2644 * Changing the format of the funny name to accommodate more 2645 * sillynames per directory. 2646 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is 2647 * CPU ticks since boot. 2648 */ 2649 pid = curthread->td_proc->p_pid; 2650 lticks = (unsigned int)ticks; 2651 for ( ; ; ) { 2652 sp->s_namlen = sprintf(sp->s_name, 2653 ".nfs.%08x.%04x4.4", lticks, 2654 pid); 2655 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2656 curthread, NULL)) 2657 break; 2658 lticks++; 2659 } 2660 error = nfs_renameit(dvp, vp, cnp, sp); 2661 if (error) 2662 goto bad; 2663 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2664 curthread, &np); 2665 np->n_sillyrename = sp; 2666 return (0); 2667 bad: 2668 vrele(sp->s_dvp); 2669 crfree(sp->s_cred); 2670 free(sp, M_NEWNFSREQ); 2671 return (error); 2672 } 2673 2674 /* 2675 * Look up a file name and optionally either update the file handle or 2676 * allocate an nfsnode, depending on the value of npp. 2677 * npp == NULL --> just do the lookup 2678 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2679 * handled too 2680 * *npp != NULL --> update the file handle in the vnode 2681 */ 2682 static int 2683 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred, 2684 struct thread *td, struct nfsnode **npp) 2685 { 2686 struct vnode *newvp = NULL, *vp; 2687 struct nfsnode *np, *dnp = VTONFS(dvp); 2688 struct nfsfh *nfhp, *onfhp; 2689 struct nfsvattr nfsva, dnfsva; 2690 struct componentname cn; 2691 int error = 0, attrflag, dattrflag; 2692 u_int hash; 2693 struct timespec ts; 2694 2695 nanouptime(&ts); 2696 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva, 2697 &nfhp, &attrflag, &dattrflag, 0); 2698 if (dattrflag) 2699 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2700 if (npp && !error) { 2701 if (*npp != NULL) { 2702 np = *npp; 2703 vp = NFSTOV(np); 2704 /* 2705 * For NFSv4, check to see if it is the same name and 2706 * replace the name, if it is different. 2707 */ 2708 if (np->n_v4 != NULL && nfsva.na_type == VREG && 2709 (np->n_v4->n4_namelen != len || 2710 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) || 2711 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 2712 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2713 dnp->n_fhp->nfh_len))) { 2714 #ifdef notdef 2715 { char nnn[100]; int nnnl; 2716 nnnl = (len < 100) ? len : 99; 2717 bcopy(name, nnn, nnnl); 2718 nnn[nnnl] = '\0'; 2719 printf("replace=%s\n",nnn); 2720 } 2721 #endif 2722 free(np->n_v4, M_NFSV4NODE); 2723 np->n_v4 = malloc( 2724 sizeof (struct nfsv4node) + 2725 dnp->n_fhp->nfh_len + len - 1, 2726 M_NFSV4NODE, M_WAITOK); 2727 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 2728 np->n_v4->n4_namelen = len; 2729 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2730 dnp->n_fhp->nfh_len); 2731 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len); 2732 } 2733 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, 2734 FNV1_32_INIT); 2735 onfhp = np->n_fhp; 2736 /* 2737 * Rehash node for new file handle. 2738 */ 2739 vfs_hash_rehash(vp, hash); 2740 np->n_fhp = nfhp; 2741 if (onfhp != NULL) 2742 free(onfhp, M_NFSFH); 2743 newvp = NFSTOV(np); 2744 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) { 2745 free(nfhp, M_NFSFH); 2746 VREF(dvp); 2747 newvp = dvp; 2748 } else { 2749 cn.cn_nameptr = name; 2750 cn.cn_namelen = len; 2751 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td, 2752 &np, LK_EXCLUSIVE); 2753 if (error) 2754 return (error); 2755 newvp = NFSTOV(np); 2756 /* 2757 * If n_localmodtime >= time before RPC, then 2758 * a file modification operation, such as 2759 * VOP_SETATTR() of size, has occurred while 2760 * the Lookup RPC and acquisition of the vnode 2761 * happened. As such, the attributes might 2762 * be stale, with possibly an incorrect size. 2763 */ 2764 NFSLOCKNODE(np); 2765 if (timespecisset(&np->n_localmodtime) && 2766 timespeccmp(&np->n_localmodtime, &ts, >=)) { 2767 NFSCL_DEBUG(4, "nfs_lookitup: localmod " 2768 "stale attributes\n"); 2769 attrflag = 0; 2770 } 2771 NFSUNLOCKNODE(np); 2772 } 2773 if (!attrflag && *npp == NULL) { 2774 if (newvp == dvp) 2775 vrele(newvp); 2776 else 2777 vput(newvp); 2778 return (ENOENT); 2779 } 2780 if (attrflag) 2781 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 2782 } 2783 if (npp && *npp == NULL) { 2784 if (error) { 2785 if (newvp) { 2786 if (newvp == dvp) 2787 vrele(newvp); 2788 else 2789 vput(newvp); 2790 } 2791 } else 2792 *npp = np; 2793 } 2794 if (error && NFS_ISV4(dvp)) 2795 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2796 return (error); 2797 } 2798 2799 /* 2800 * Nfs Version 3 and 4 commit rpc 2801 */ 2802 int 2803 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, 2804 struct thread *td) 2805 { 2806 struct nfsvattr nfsva; 2807 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2808 struct nfsnode *np; 2809 struct uio uio; 2810 int error, attrflag; 2811 2812 np = VTONFS(vp); 2813 error = EIO; 2814 attrflag = 0; 2815 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) { 2816 uio.uio_offset = offset; 2817 uio.uio_resid = cnt; 2818 error = nfscl_doiods(vp, &uio, NULL, NULL, 2819 NFSV4OPEN_ACCESSWRITE, 1, cred, td); 2820 if (error != 0) { 2821 NFSLOCKNODE(np); 2822 np->n_flag &= ~NDSCOMMIT; 2823 NFSUNLOCKNODE(np); 2824 } 2825 } 2826 if (error != 0) { 2827 mtx_lock(&nmp->nm_mtx); 2828 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { 2829 mtx_unlock(&nmp->nm_mtx); 2830 return (0); 2831 } 2832 mtx_unlock(&nmp->nm_mtx); 2833 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva, 2834 &attrflag); 2835 } 2836 if (attrflag != 0) 2837 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2838 if (error != 0 && NFS_ISV4(vp)) 2839 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2840 return (error); 2841 } 2842 2843 /* 2844 * Strategy routine. 2845 * For async requests when nfsiod(s) are running, queue the request by 2846 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the 2847 * request. 2848 */ 2849 static int 2850 nfs_strategy(struct vop_strategy_args *ap) 2851 { 2852 struct buf *bp; 2853 struct vnode *vp; 2854 struct ucred *cr; 2855 2856 bp = ap->a_bp; 2857 vp = ap->a_vp; 2858 KASSERT(bp->b_vp == vp, ("missing b_getvp")); 2859 KASSERT(!(bp->b_flags & B_DONE), 2860 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); 2861 2862 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno) 2863 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize / 2864 DEV_BSIZE); 2865 if (bp->b_iocmd == BIO_READ) 2866 cr = bp->b_rcred; 2867 else 2868 cr = bp->b_wcred; 2869 2870 /* 2871 * If the op is asynchronous and an i/o daemon is waiting 2872 * queue the request, wake it up and wait for completion 2873 * otherwise just do it ourselves. 2874 */ 2875 if ((bp->b_flags & B_ASYNC) == 0 || 2876 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread)) 2877 (void) ncl_doio(vp, bp, cr, curthread, 1); 2878 return (0); 2879 } 2880 2881 /* 2882 * fsync vnode op. Just call ncl_flush() with commit == 1. 2883 */ 2884 /* ARGSUSED */ 2885 static int 2886 nfs_fsync(struct vop_fsync_args *ap) 2887 { 2888 2889 if (ap->a_vp->v_type != VREG) { 2890 /* 2891 * For NFS, metadata is changed synchronously on the server, 2892 * so there is nothing to flush. Also, ncl_flush() clears 2893 * the NMODIFIED flag and that shouldn't be done here for 2894 * directories. 2895 */ 2896 return (0); 2897 } 2898 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0)); 2899 } 2900 2901 /* 2902 * Flush all the blocks associated with a vnode. 2903 * Walk through the buffer pool and push any dirty pages 2904 * associated with the vnode. 2905 * If the called_from_renewthread argument is TRUE, it has been called 2906 * from the NFSv4 renew thread and, as such, cannot block indefinitely 2907 * waiting for a buffer write to complete. 2908 */ 2909 int 2910 ncl_flush(struct vnode *vp, int waitfor, struct thread *td, 2911 int commit, int called_from_renewthread) 2912 { 2913 struct nfsnode *np = VTONFS(vp); 2914 struct buf *bp; 2915 int i; 2916 struct buf *nbp; 2917 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2918 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2919 int passone = 1, trycnt = 0; 2920 u_quad_t off, endoff, toff; 2921 struct ucred* wcred = NULL; 2922 struct buf **bvec = NULL; 2923 struct bufobj *bo; 2924 #ifndef NFS_COMMITBVECSIZ 2925 #define NFS_COMMITBVECSIZ 20 2926 #endif 2927 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2928 u_int bvecsize = 0, bveccount; 2929 struct timespec ts; 2930 2931 if (called_from_renewthread != 0) 2932 slptimeo = hz; 2933 if (nmp->nm_flag & NFSMNT_INT) 2934 slpflag = PCATCH; 2935 if (!commit) 2936 passone = 0; 2937 bo = &vp->v_bufobj; 2938 /* 2939 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2940 * server, but has not been committed to stable storage on the server 2941 * yet. On the first pass, the byte range is worked out and the commit 2942 * rpc is done. On the second pass, ncl_writebp() is called to do the 2943 * job. 2944 */ 2945 again: 2946 off = (u_quad_t)-1; 2947 endoff = 0; 2948 bvecpos = 0; 2949 if (NFS_ISV34(vp) && commit) { 2950 if (bvec != NULL && bvec != bvec_on_stack) 2951 free(bvec, M_TEMP); 2952 /* 2953 * Count up how many buffers waiting for a commit. 2954 */ 2955 bveccount = 0; 2956 BO_LOCK(bo); 2957 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2958 if (!BUF_ISLOCKED(bp) && 2959 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2960 == (B_DELWRI | B_NEEDCOMMIT)) 2961 bveccount++; 2962 } 2963 /* 2964 * Allocate space to remember the list of bufs to commit. It is 2965 * important to use M_NOWAIT here to avoid a race with nfs_write. 2966 * If we can't get memory (for whatever reason), we will end up 2967 * committing the buffers one-by-one in the loop below. 2968 */ 2969 if (bveccount > NFS_COMMITBVECSIZ) { 2970 /* 2971 * Release the vnode interlock to avoid a lock 2972 * order reversal. 2973 */ 2974 BO_UNLOCK(bo); 2975 bvec = (struct buf **) 2976 malloc(bveccount * sizeof(struct buf *), 2977 M_TEMP, M_NOWAIT); 2978 BO_LOCK(bo); 2979 if (bvec == NULL) { 2980 bvec = bvec_on_stack; 2981 bvecsize = NFS_COMMITBVECSIZ; 2982 } else 2983 bvecsize = bveccount; 2984 } else { 2985 bvec = bvec_on_stack; 2986 bvecsize = NFS_COMMITBVECSIZ; 2987 } 2988 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2989 if (bvecpos >= bvecsize) 2990 break; 2991 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2992 nbp = TAILQ_NEXT(bp, b_bobufs); 2993 continue; 2994 } 2995 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 2996 (B_DELWRI | B_NEEDCOMMIT)) { 2997 BUF_UNLOCK(bp); 2998 nbp = TAILQ_NEXT(bp, b_bobufs); 2999 continue; 3000 } 3001 BO_UNLOCK(bo); 3002 bremfree(bp); 3003 /* 3004 * Work out if all buffers are using the same cred 3005 * so we can deal with them all with one commit. 3006 * 3007 * NOTE: we are not clearing B_DONE here, so we have 3008 * to do it later on in this routine if we intend to 3009 * initiate I/O on the bp. 3010 * 3011 * Note: to avoid loopback deadlocks, we do not 3012 * assign b_runningbufspace. 3013 */ 3014 if (wcred == NULL) 3015 wcred = bp->b_wcred; 3016 else if (wcred != bp->b_wcred) 3017 wcred = NOCRED; 3018 vfs_busy_pages(bp, 1); 3019 3020 BO_LOCK(bo); 3021 /* 3022 * bp is protected by being locked, but nbp is not 3023 * and vfs_busy_pages() may sleep. We have to 3024 * recalculate nbp. 3025 */ 3026 nbp = TAILQ_NEXT(bp, b_bobufs); 3027 3028 /* 3029 * A list of these buffers is kept so that the 3030 * second loop knows which buffers have actually 3031 * been committed. This is necessary, since there 3032 * may be a race between the commit rpc and new 3033 * uncommitted writes on the file. 3034 */ 3035 bvec[bvecpos++] = bp; 3036 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3037 bp->b_dirtyoff; 3038 if (toff < off) 3039 off = toff; 3040 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 3041 if (toff > endoff) 3042 endoff = toff; 3043 } 3044 BO_UNLOCK(bo); 3045 } 3046 if (bvecpos > 0) { 3047 /* 3048 * Commit data on the server, as required. 3049 * If all bufs are using the same wcred, then use that with 3050 * one call for all of them, otherwise commit each one 3051 * separately. 3052 */ 3053 if (wcred != NOCRED) 3054 retv = ncl_commit(vp, off, (int)(endoff - off), 3055 wcred, td); 3056 else { 3057 retv = 0; 3058 for (i = 0; i < bvecpos; i++) { 3059 off_t off, size; 3060 bp = bvec[i]; 3061 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3062 bp->b_dirtyoff; 3063 size = (u_quad_t)(bp->b_dirtyend 3064 - bp->b_dirtyoff); 3065 retv = ncl_commit(vp, off, (int)size, 3066 bp->b_wcred, td); 3067 if (retv) break; 3068 } 3069 } 3070 3071 if (retv == NFSERR_STALEWRITEVERF) 3072 ncl_clearcommit(vp->v_mount); 3073 3074 /* 3075 * Now, either mark the blocks I/O done or mark the 3076 * blocks dirty, depending on whether the commit 3077 * succeeded. 3078 */ 3079 for (i = 0; i < bvecpos; i++) { 3080 bp = bvec[i]; 3081 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3082 if (!NFSCL_FORCEDISM(vp->v_mount) && retv) { 3083 /* 3084 * Error, leave B_DELWRI intact 3085 */ 3086 vfs_unbusy_pages(bp); 3087 brelse(bp); 3088 } else { 3089 /* 3090 * Success, remove B_DELWRI ( bundirty() ). 3091 * 3092 * b_dirtyoff/b_dirtyend seem to be NFS 3093 * specific. We should probably move that 3094 * into bundirty(). XXX 3095 */ 3096 bufobj_wref(bo); 3097 bp->b_flags |= B_ASYNC; 3098 bundirty(bp); 3099 bp->b_flags &= ~B_DONE; 3100 bp->b_ioflags &= ~BIO_ERROR; 3101 bp->b_dirtyoff = bp->b_dirtyend = 0; 3102 bufdone(bp); 3103 } 3104 } 3105 } 3106 3107 /* 3108 * Start/do any write(s) that are required. 3109 */ 3110 loop: 3111 BO_LOCK(bo); 3112 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 3113 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 3114 if (waitfor != MNT_WAIT || passone) 3115 continue; 3116 3117 error = BUF_TIMELOCK(bp, 3118 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 3119 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo); 3120 if (error == 0) { 3121 BUF_UNLOCK(bp); 3122 goto loop; 3123 } 3124 if (error == ENOLCK) { 3125 error = 0; 3126 goto loop; 3127 } 3128 if (called_from_renewthread != 0) { 3129 /* 3130 * Return EIO so the flush will be retried 3131 * later. 3132 */ 3133 error = EIO; 3134 goto done; 3135 } 3136 if (newnfs_sigintr(nmp, td)) { 3137 error = EINTR; 3138 goto done; 3139 } 3140 if (slpflag == PCATCH) { 3141 slpflag = 0; 3142 slptimeo = 2 * hz; 3143 } 3144 goto loop; 3145 } 3146 if ((bp->b_flags & B_DELWRI) == 0) 3147 panic("nfs_fsync: not dirty"); 3148 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { 3149 BUF_UNLOCK(bp); 3150 continue; 3151 } 3152 BO_UNLOCK(bo); 3153 bremfree(bp); 3154 bp->b_flags |= B_ASYNC; 3155 bwrite(bp); 3156 if (newnfs_sigintr(nmp, td)) { 3157 error = EINTR; 3158 goto done; 3159 } 3160 goto loop; 3161 } 3162 if (passone) { 3163 passone = 0; 3164 BO_UNLOCK(bo); 3165 goto again; 3166 } 3167 if (waitfor == MNT_WAIT) { 3168 while (bo->bo_numoutput) { 3169 error = bufobj_wwait(bo, slpflag, slptimeo); 3170 if (error) { 3171 BO_UNLOCK(bo); 3172 if (called_from_renewthread != 0) { 3173 /* 3174 * Return EIO so that the flush will be 3175 * retried later. 3176 */ 3177 error = EIO; 3178 goto done; 3179 } 3180 error = newnfs_sigintr(nmp, td); 3181 if (error) 3182 goto done; 3183 if (slpflag == PCATCH) { 3184 slpflag = 0; 3185 slptimeo = 2 * hz; 3186 } 3187 BO_LOCK(bo); 3188 } 3189 } 3190 if (bo->bo_dirty.bv_cnt != 0 && commit) { 3191 BO_UNLOCK(bo); 3192 goto loop; 3193 } 3194 /* 3195 * Wait for all the async IO requests to drain 3196 */ 3197 BO_UNLOCK(bo); 3198 NFSLOCKNODE(np); 3199 while (np->n_directio_asyncwr > 0) { 3200 np->n_flag |= NFSYNCWAIT; 3201 error = newnfs_msleep(td, &np->n_directio_asyncwr, 3202 &np->n_mtx, slpflag | (PRIBIO + 1), 3203 "nfsfsync", 0); 3204 if (error) { 3205 if (newnfs_sigintr(nmp, td)) { 3206 NFSUNLOCKNODE(np); 3207 error = EINTR; 3208 goto done; 3209 } 3210 } 3211 } 3212 NFSUNLOCKNODE(np); 3213 } else 3214 BO_UNLOCK(bo); 3215 if (NFSHASPNFS(nmp)) { 3216 nfscl_layoutcommit(vp, td); 3217 /* 3218 * Invalidate the attribute cache, since writes to a DS 3219 * won't update the size attribute. 3220 */ 3221 NFSLOCKNODE(np); 3222 np->n_attrstamp = 0; 3223 } else 3224 NFSLOCKNODE(np); 3225 if (np->n_flag & NWRITEERR) { 3226 error = np->n_error; 3227 np->n_flag &= ~NWRITEERR; 3228 } 3229 if (commit && bo->bo_dirty.bv_cnt == 0 && 3230 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0) 3231 np->n_flag &= ~NMODIFIED; 3232 NFSUNLOCKNODE(np); 3233 done: 3234 if (bvec != NULL && bvec != bvec_on_stack) 3235 free(bvec, M_TEMP); 3236 if (error == 0 && commit != 0 && waitfor == MNT_WAIT && 3237 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 || 3238 np->n_directio_asyncwr != 0)) { 3239 if (trycnt++ < 5) { 3240 /* try, try again... */ 3241 passone = 1; 3242 wcred = NULL; 3243 bvec = NULL; 3244 bvecsize = 0; 3245 goto again; 3246 } 3247 vn_printf(vp, "ncl_flush failed"); 3248 error = called_from_renewthread != 0 ? EIO : EBUSY; 3249 } 3250 if (error == 0) { 3251 nanouptime(&ts); 3252 NFSLOCKNODE(np); 3253 np->n_localmodtime = ts; 3254 NFSUNLOCKNODE(np); 3255 } 3256 return (error); 3257 } 3258 3259 /* 3260 * NFS advisory byte-level locks. 3261 */ 3262 static int 3263 nfs_advlock(struct vop_advlock_args *ap) 3264 { 3265 struct vnode *vp = ap->a_vp; 3266 struct ucred *cred; 3267 struct nfsnode *np = VTONFS(ap->a_vp); 3268 struct proc *p = (struct proc *)ap->a_id; 3269 struct thread *td = curthread; /* XXX */ 3270 struct vattr va; 3271 int ret, error; 3272 u_quad_t size; 3273 struct nfsmount *nmp; 3274 3275 error = NFSVOPLOCK(vp, LK_SHARED); 3276 if (error != 0) 3277 return (EBADF); 3278 nmp = VFSTONFS(vp->v_mount); 3279 if (!NFS_ISV4(vp) || (nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3280 if ((nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3281 size = np->n_size; 3282 NFSVOPUNLOCK(vp); 3283 error = lf_advlock(ap, &(vp->v_lockf), size); 3284 } else { 3285 if (nfs_advlock_p != NULL) 3286 error = nfs_advlock_p(ap); 3287 else { 3288 NFSVOPUNLOCK(vp); 3289 error = ENOLCK; 3290 } 3291 } 3292 if (error == 0 && ap->a_op == F_SETLK) { 3293 error = NFSVOPLOCK(vp, LK_SHARED); 3294 if (error == 0) { 3295 /* Mark that a file lock has been acquired. */ 3296 NFSLOCKNODE(np); 3297 np->n_flag |= NHASBEENLOCKED; 3298 NFSUNLOCKNODE(np); 3299 NFSVOPUNLOCK(vp); 3300 } 3301 } 3302 return (error); 3303 } else if ((ap->a_flags & (F_POSIX | F_FLOCK)) != 0) { 3304 if (vp->v_type != VREG) { 3305 error = EINVAL; 3306 goto out; 3307 } 3308 if ((ap->a_flags & F_POSIX) != 0) 3309 cred = p->p_ucred; 3310 else 3311 cred = td->td_ucred; 3312 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 3313 if (VN_IS_DOOMED(vp)) { 3314 error = EBADF; 3315 goto out; 3316 } 3317 3318 /* 3319 * If this is unlocking a write locked region, flush and 3320 * commit them before unlocking. This is required by 3321 * RFC3530 Sec. 9.3.2. 3322 */ 3323 if (ap->a_op == F_UNLCK && 3324 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id, 3325 ap->a_flags)) 3326 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0); 3327 3328 /* 3329 * Mark NFS node as might have acquired a lock. 3330 * This is separate from NHASBEENLOCKED, because it must 3331 * be done before the nfsrpc_advlock() call, which might 3332 * add a nfscllock structure to the client state. 3333 * It is used to check for the case where a nfscllock 3334 * state structure cannot exist for the file. 3335 * Only done for "oneopenown" NFSv4.1/4.2 mounts. 3336 */ 3337 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) { 3338 NFSLOCKNODE(np); 3339 np->n_flag |= NMIGHTBELOCKED; 3340 NFSUNLOCKNODE(np); 3341 } 3342 3343 /* 3344 * Loop around doing the lock op, while a blocking lock 3345 * must wait for the lock op to succeed. 3346 */ 3347 do { 3348 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op, 3349 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags); 3350 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3351 ap->a_op == F_SETLK) { 3352 NFSVOPUNLOCK(vp); 3353 error = nfs_catnap(PZERO | PCATCH, ret, 3354 "ncladvl"); 3355 if (error) 3356 return (EINTR); 3357 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3358 if (VN_IS_DOOMED(vp)) { 3359 error = EBADF; 3360 goto out; 3361 } 3362 } 3363 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3364 ap->a_op == F_SETLK); 3365 if (ret == NFSERR_DENIED) { 3366 error = EAGAIN; 3367 goto out; 3368 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) { 3369 error = ret; 3370 goto out; 3371 } else if (ret != 0) { 3372 error = EACCES; 3373 goto out; 3374 } 3375 3376 /* 3377 * Now, if we just got a lock, invalidate data in the buffer 3378 * cache, as required, so that the coherency conforms with 3379 * RFC3530 Sec. 9.3.2. 3380 */ 3381 if (ap->a_op == F_SETLK) { 3382 if ((np->n_flag & NMODIFIED) == 0) { 3383 np->n_attrstamp = 0; 3384 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3385 ret = VOP_GETATTR(vp, &va, cred); 3386 } 3387 if ((np->n_flag & NMODIFIED) || ret || 3388 np->n_change != va.va_filerev) { 3389 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1); 3390 np->n_attrstamp = 0; 3391 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3392 ret = VOP_GETATTR(vp, &va, cred); 3393 if (!ret) { 3394 np->n_mtime = va.va_mtime; 3395 np->n_change = va.va_filerev; 3396 } 3397 } 3398 /* Mark that a file lock has been acquired. */ 3399 NFSLOCKNODE(np); 3400 np->n_flag |= NHASBEENLOCKED; 3401 NFSUNLOCKNODE(np); 3402 } 3403 } else 3404 error = EOPNOTSUPP; 3405 out: 3406 NFSVOPUNLOCK(vp); 3407 return (error); 3408 } 3409 3410 /* 3411 * NFS advisory byte-level locks. 3412 */ 3413 static int 3414 nfs_advlockasync(struct vop_advlockasync_args *ap) 3415 { 3416 struct vnode *vp = ap->a_vp; 3417 u_quad_t size; 3418 int error; 3419 3420 error = NFSVOPLOCK(vp, LK_SHARED); 3421 if (error) 3422 return (error); 3423 if (NFS_ISV4(vp)) { 3424 NFSVOPUNLOCK(vp); 3425 return (EOPNOTSUPP); 3426 } 3427 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 3428 size = VTONFS(vp)->n_size; 3429 NFSVOPUNLOCK(vp); 3430 error = lf_advlockasync(ap, &(vp->v_lockf), size); 3431 } else { 3432 NFSVOPUNLOCK(vp); 3433 error = EOPNOTSUPP; 3434 } 3435 return (error); 3436 } 3437 3438 /* 3439 * Print out the contents of an nfsnode. 3440 */ 3441 static int 3442 nfs_print(struct vop_print_args *ap) 3443 { 3444 struct vnode *vp = ap->a_vp; 3445 struct nfsnode *np = VTONFS(vp); 3446 3447 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid, 3448 (uintmax_t)np->n_vattr.na_fsid); 3449 if (vp->v_type == VFIFO) 3450 fifo_printinfo(vp); 3451 printf("\n"); 3452 return (0); 3453 } 3454 3455 /* 3456 * This is the "real" nfs::bwrite(struct buf*). 3457 * We set B_CACHE if this is a VMIO buffer. 3458 */ 3459 int 3460 ncl_writebp(struct buf *bp, int force __unused, struct thread *td) 3461 { 3462 int oldflags, rtval; 3463 3464 if (bp->b_flags & B_INVAL) { 3465 brelse(bp); 3466 return (0); 3467 } 3468 3469 oldflags = bp->b_flags; 3470 bp->b_flags |= B_CACHE; 3471 3472 /* 3473 * Undirty the bp. We will redirty it later if the I/O fails. 3474 */ 3475 bundirty(bp); 3476 bp->b_flags &= ~B_DONE; 3477 bp->b_ioflags &= ~BIO_ERROR; 3478 bp->b_iocmd = BIO_WRITE; 3479 3480 bufobj_wref(bp->b_bufobj); 3481 curthread->td_ru.ru_oublock++; 3482 3483 /* 3484 * Note: to avoid loopback deadlocks, we do not 3485 * assign b_runningbufspace. 3486 */ 3487 vfs_busy_pages(bp, 1); 3488 3489 BUF_KERNPROC(bp); 3490 bp->b_iooffset = dbtob(bp->b_blkno); 3491 bstrategy(bp); 3492 3493 if ((oldflags & B_ASYNC) != 0) 3494 return (0); 3495 3496 rtval = bufwait(bp); 3497 if (oldflags & B_DELWRI) 3498 reassignbuf(bp); 3499 brelse(bp); 3500 return (rtval); 3501 } 3502 3503 /* 3504 * nfs special file access vnode op. 3505 * Essentially just get vattr and then imitate iaccess() since the device is 3506 * local to the client. 3507 */ 3508 static int 3509 nfsspec_access(struct vop_access_args *ap) 3510 { 3511 struct vattr *vap; 3512 struct ucred *cred = ap->a_cred; 3513 struct vnode *vp = ap->a_vp; 3514 accmode_t accmode = ap->a_accmode; 3515 struct vattr vattr; 3516 int error; 3517 3518 /* 3519 * Disallow write attempts on filesystems mounted read-only; 3520 * unless the file is a socket, fifo, or a block or character 3521 * device resident on the filesystem. 3522 */ 3523 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3524 switch (vp->v_type) { 3525 case VREG: 3526 case VDIR: 3527 case VLNK: 3528 return (EROFS); 3529 default: 3530 break; 3531 } 3532 } 3533 vap = &vattr; 3534 error = VOP_GETATTR(vp, vap, cred); 3535 if (error) 3536 goto out; 3537 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, 3538 accmode, cred); 3539 out: 3540 return error; 3541 } 3542 3543 /* 3544 * Read wrapper for fifos. 3545 */ 3546 static int 3547 nfsfifo_read(struct vop_read_args *ap) 3548 { 3549 struct nfsnode *np = VTONFS(ap->a_vp); 3550 int error; 3551 3552 /* 3553 * Set access flag. 3554 */ 3555 NFSLOCKNODE(np); 3556 np->n_flag |= NACC; 3557 vfs_timestamp(&np->n_atim); 3558 NFSUNLOCKNODE(np); 3559 error = fifo_specops.vop_read(ap); 3560 return error; 3561 } 3562 3563 /* 3564 * Write wrapper for fifos. 3565 */ 3566 static int 3567 nfsfifo_write(struct vop_write_args *ap) 3568 { 3569 struct nfsnode *np = VTONFS(ap->a_vp); 3570 3571 /* 3572 * Set update flag. 3573 */ 3574 NFSLOCKNODE(np); 3575 np->n_flag |= NUPD; 3576 vfs_timestamp(&np->n_mtim); 3577 NFSUNLOCKNODE(np); 3578 return(fifo_specops.vop_write(ap)); 3579 } 3580 3581 /* 3582 * Close wrapper for fifos. 3583 * 3584 * Update the times on the nfsnode then do fifo close. 3585 */ 3586 static int 3587 nfsfifo_close(struct vop_close_args *ap) 3588 { 3589 struct vnode *vp = ap->a_vp; 3590 struct nfsnode *np = VTONFS(vp); 3591 struct vattr vattr; 3592 struct timespec ts; 3593 3594 NFSLOCKNODE(np); 3595 if (np->n_flag & (NACC | NUPD)) { 3596 vfs_timestamp(&ts); 3597 if (np->n_flag & NACC) 3598 np->n_atim = ts; 3599 if (np->n_flag & NUPD) 3600 np->n_mtim = ts; 3601 np->n_flag |= NCHG; 3602 if (vrefcnt(vp) == 1 && 3603 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3604 VATTR_NULL(&vattr); 3605 if (np->n_flag & NACC) 3606 vattr.va_atime = np->n_atim; 3607 if (np->n_flag & NUPD) 3608 vattr.va_mtime = np->n_mtim; 3609 NFSUNLOCKNODE(np); 3610 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3611 goto out; 3612 } 3613 } 3614 NFSUNLOCKNODE(np); 3615 out: 3616 return (fifo_specops.vop_close(ap)); 3617 } 3618 3619 /* 3620 * Just call ncl_writebp() with the force argument set to 1. 3621 * 3622 * NOTE: B_DONE may or may not be set in a_bp on call. 3623 */ 3624 static int 3625 nfs_bwrite(struct buf *bp) 3626 { 3627 3628 return (ncl_writebp(bp, 1, curthread)); 3629 } 3630 3631 struct buf_ops buf_ops_newnfs = { 3632 .bop_name = "buf_ops_nfs", 3633 .bop_write = nfs_bwrite, 3634 .bop_strategy = bufstrategy, 3635 .bop_sync = bufsync, 3636 .bop_bdflush = bufbdflush, 3637 }; 3638 3639 static int 3640 nfs_getacl(struct vop_getacl_args *ap) 3641 { 3642 int error; 3643 3644 if (ap->a_type != ACL_TYPE_NFS4) 3645 return (EOPNOTSUPP); 3646 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3647 if (error > NFSERR_STALE) { 3648 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3649 error = EPERM; 3650 } 3651 return (error); 3652 } 3653 3654 static int 3655 nfs_setacl(struct vop_setacl_args *ap) 3656 { 3657 int error; 3658 3659 if (ap->a_type != ACL_TYPE_NFS4) 3660 return (EOPNOTSUPP); 3661 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3662 if (error > NFSERR_STALE) { 3663 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3664 error = EPERM; 3665 } 3666 return (error); 3667 } 3668 3669 /* 3670 * VOP_ADVISE for NFS. 3671 * Just return 0 for any errors, since it is just a hint. 3672 */ 3673 static int 3674 nfs_advise(struct vop_advise_args *ap) 3675 { 3676 struct thread *td = curthread; 3677 struct nfsmount *nmp; 3678 uint64_t len; 3679 int error; 3680 3681 /* 3682 * First do vop_stdadvise() to handle the buffer cache. 3683 */ 3684 error = vop_stdadvise(ap); 3685 if (error != 0) 3686 return (error); 3687 if (ap->a_start < 0 || ap->a_end < 0) 3688 return (0); 3689 if (ap->a_end == OFF_MAX) 3690 len = 0; 3691 else if (ap->a_end < ap->a_start) 3692 return (0); 3693 else 3694 len = ap->a_end - ap->a_start + 1; 3695 nmp = VFSTONFS(ap->a_vp->v_mount); 3696 mtx_lock(&nmp->nm_mtx); 3697 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 3698 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) == 3699 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) { 3700 mtx_unlock(&nmp->nm_mtx); 3701 return (0); 3702 } 3703 mtx_unlock(&nmp->nm_mtx); 3704 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice, 3705 td->td_ucred, td); 3706 if (error == NFSERR_NOTSUPP) { 3707 mtx_lock(&nmp->nm_mtx); 3708 nmp->nm_privflag |= NFSMNTP_NOADVISE; 3709 mtx_unlock(&nmp->nm_mtx); 3710 } 3711 return (0); 3712 } 3713 3714 /* 3715 * nfs allocate call 3716 */ 3717 static int 3718 nfs_allocate(struct vop_allocate_args *ap) 3719 { 3720 struct vnode *vp = ap->a_vp; 3721 struct thread *td = curthread; 3722 struct nfsvattr nfsva; 3723 struct nfsmount *nmp; 3724 struct nfsnode *np; 3725 off_t alen; 3726 int attrflag, error, ret; 3727 struct timespec ts; 3728 struct uio io; 3729 3730 attrflag = 0; 3731 nmp = VFSTONFS(vp->v_mount); 3732 np = VTONFS(vp); 3733 mtx_lock(&nmp->nm_mtx); 3734 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3735 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) { 3736 mtx_unlock(&nmp->nm_mtx); 3737 alen = *ap->a_len; 3738 if ((uint64_t)alen > nfs_maxalloclen) 3739 alen = nfs_maxalloclen; 3740 3741 /* Check the file size limit. */ 3742 io.uio_offset = *ap->a_offset; 3743 io.uio_resid = alen; 3744 error = vn_rlimit_fsize(vp, &io, td); 3745 3746 /* 3747 * Flush first to ensure that the allocate adds to the 3748 * file's allocation on the server. 3749 */ 3750 if (error == 0) 3751 error = ncl_flush(vp, MNT_WAIT, td, 1, 0); 3752 if (error == 0) 3753 error = nfsrpc_allocate(vp, *ap->a_offset, alen, 3754 &nfsva, &attrflag, ap->a_cred, td); 3755 if (error == 0) { 3756 *ap->a_offset += alen; 3757 *ap->a_len -= alen; 3758 nanouptime(&ts); 3759 NFSLOCKNODE(np); 3760 np->n_localmodtime = ts; 3761 NFSUNLOCKNODE(np); 3762 } else if (error == NFSERR_NOTSUPP) { 3763 mtx_lock(&nmp->nm_mtx); 3764 nmp->nm_privflag |= NFSMNTP_NOALLOCATE; 3765 mtx_unlock(&nmp->nm_mtx); 3766 error = EINVAL; 3767 } 3768 } else { 3769 mtx_unlock(&nmp->nm_mtx); 3770 error = EINVAL; 3771 } 3772 if (attrflag != 0) { 3773 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3774 if (error == 0 && ret != 0) 3775 error = ret; 3776 } 3777 if (error != 0) 3778 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3779 return (error); 3780 } 3781 3782 /* 3783 * nfs deallocate call 3784 */ 3785 static int 3786 nfs_deallocate(struct vop_deallocate_args *ap) 3787 { 3788 struct vnode *vp = ap->a_vp; 3789 struct thread *td = curthread; 3790 struct nfsvattr nfsva; 3791 struct nfsmount *nmp; 3792 struct nfsnode *np; 3793 off_t tlen, mlen; 3794 int attrflag, error, ret; 3795 bool clipped; 3796 struct timespec ts; 3797 3798 error = 0; 3799 attrflag = 0; 3800 nmp = VFSTONFS(vp->v_mount); 3801 np = VTONFS(vp); 3802 mtx_lock(&nmp->nm_mtx); 3803 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3804 (nmp->nm_privflag & NFSMNTP_NODEALLOCATE) == 0) { 3805 mtx_unlock(&nmp->nm_mtx); 3806 tlen = omin(OFF_MAX - *ap->a_offset, *ap->a_len); 3807 NFSCL_DEBUG(4, "dealloc: off=%jd len=%jd maxfilesize=%ju\n", 3808 (intmax_t)*ap->a_offset, (intmax_t)tlen, 3809 (uintmax_t)nmp->nm_maxfilesize); 3810 if ((uint64_t)*ap->a_offset >= nmp->nm_maxfilesize) { 3811 /* Avoid EFBIG error return from the NFSv4.2 server. */ 3812 *ap->a_len = 0; 3813 return (0); 3814 } 3815 clipped = false; 3816 if ((uint64_t)*ap->a_offset + tlen > nmp->nm_maxfilesize) 3817 tlen = nmp->nm_maxfilesize - *ap->a_offset; 3818 if ((uint64_t)*ap->a_offset < np->n_size) { 3819 /* Limit the len to nfs_maxalloclen before EOF. */ 3820 mlen = omin((off_t)np->n_size - *ap->a_offset, tlen); 3821 if ((uint64_t)mlen > nfs_maxalloclen) { 3822 NFSCL_DEBUG(4, "dealloc: tlen maxalloclen\n"); 3823 tlen = nfs_maxalloclen; 3824 clipped = true; 3825 } 3826 } 3827 if (error == 0) 3828 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 3829 if (error == 0) { 3830 vnode_pager_purge_range(vp, *ap->a_offset, 3831 *ap->a_offset + tlen); 3832 error = nfsrpc_deallocate(vp, *ap->a_offset, tlen, 3833 &nfsva, &attrflag, ap->a_cred, td); 3834 NFSCL_DEBUG(4, "dealloc: rpc=%d\n", error); 3835 } 3836 if (error == 0) { 3837 NFSCL_DEBUG(4, "dealloc: attrflag=%d na_size=%ju\n", 3838 attrflag, (uintmax_t)nfsva.na_size); 3839 nanouptime(&ts); 3840 NFSLOCKNODE(np); 3841 np->n_localmodtime = ts; 3842 NFSUNLOCKNODE(np); 3843 if (attrflag != 0) { 3844 if ((uint64_t)*ap->a_offset < nfsva.na_size) 3845 *ap->a_offset += omin((off_t) 3846 nfsva.na_size - *ap->a_offset, 3847 tlen); 3848 } 3849 if (clipped && tlen < *ap->a_len) 3850 *ap->a_len -= tlen; 3851 else 3852 *ap->a_len = 0; 3853 } else if (error == NFSERR_NOTSUPP) { 3854 mtx_lock(&nmp->nm_mtx); 3855 nmp->nm_privflag |= NFSMNTP_NODEALLOCATE; 3856 mtx_unlock(&nmp->nm_mtx); 3857 } 3858 } else { 3859 mtx_unlock(&nmp->nm_mtx); 3860 error = EIO; 3861 } 3862 /* 3863 * If the NFS server cannot perform the Deallocate operation, just call 3864 * vop_stddeallocate() to perform it. 3865 */ 3866 if (error != 0 && error != NFSERR_FBIG && error != NFSERR_INVAL) { 3867 error = vop_stddeallocate(ap); 3868 NFSCL_DEBUG(4, "dealloc: stddeallocate=%d\n", error); 3869 } 3870 if (attrflag != 0) { 3871 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3872 if (error == 0 && ret != 0) 3873 error = ret; 3874 } 3875 if (error != 0) 3876 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3877 return (error); 3878 } 3879 3880 /* 3881 * nfs copy_file_range call 3882 */ 3883 static int 3884 nfs_copy_file_range(struct vop_copy_file_range_args *ap) 3885 { 3886 struct vnode *invp = ap->a_invp; 3887 struct vnode *outvp = ap->a_outvp; 3888 struct mount *mp; 3889 struct nfsvattr innfsva, outnfsva; 3890 struct vattr *vap; 3891 struct uio io; 3892 struct nfsmount *nmp; 3893 size_t len, len2; 3894 ssize_t r; 3895 int error, inattrflag, outattrflag, ret, ret2; 3896 off_t inoff, outoff; 3897 bool consecutive, must_commit, tryoutcred; 3898 3899 /* NFSv4.2 Copy is not permitted for infile == outfile. */ 3900 if (invp == outvp) { 3901 generic_copy: 3902 return (vn_generic_copy_file_range(invp, ap->a_inoffp, 3903 outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 3904 ap->a_incred, ap->a_outcred, ap->a_fsizetd)); 3905 } 3906 3907 /* Lock both vnodes, avoiding risk of deadlock. */ 3908 do { 3909 mp = NULL; 3910 error = vn_start_write(outvp, &mp, V_WAIT); 3911 if (error == 0) { 3912 error = vn_lock(outvp, LK_EXCLUSIVE); 3913 if (error == 0) { 3914 error = vn_lock(invp, LK_SHARED | LK_NOWAIT); 3915 if (error == 0) 3916 break; 3917 VOP_UNLOCK(outvp); 3918 if (mp != NULL) 3919 vn_finished_write(mp); 3920 mp = NULL; 3921 error = vn_lock(invp, LK_SHARED); 3922 if (error == 0) 3923 VOP_UNLOCK(invp); 3924 } 3925 } 3926 if (mp != NULL) 3927 vn_finished_write(mp); 3928 } while (error == 0); 3929 if (error != 0) 3930 return (error); 3931 3932 /* 3933 * More reasons to avoid nfs copy: not NFSv4.2, or explicitly 3934 * disabled. 3935 */ 3936 nmp = VFSTONFS(invp->v_mount); 3937 mtx_lock(&nmp->nm_mtx); 3938 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 3939 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0) { 3940 mtx_unlock(&nmp->nm_mtx); 3941 VOP_UNLOCK(invp); 3942 VOP_UNLOCK(outvp); 3943 if (mp != NULL) 3944 vn_finished_write(mp); 3945 goto generic_copy; 3946 } 3947 mtx_unlock(&nmp->nm_mtx); 3948 3949 /* 3950 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer? 3951 */ 3952 io.uio_offset = *ap->a_outoffp; 3953 io.uio_resid = *ap->a_lenp; 3954 error = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd); 3955 *ap->a_lenp = io.uio_resid; 3956 /* 3957 * No need to call vn_rlimit_fsizex_res before return, since the uio is 3958 * local. 3959 */ 3960 3961 /* 3962 * Flush the input file so that the data is up to date before 3963 * the copy. Flush writes for the output file so that they 3964 * do not overwrite the data copied to the output file by the Copy. 3965 * Set the commit argument for both flushes so that the data is on 3966 * stable storage before the Copy RPC. This is done in case the 3967 * server reboots during the Copy and needs to be redone. 3968 */ 3969 if (error == 0) 3970 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0); 3971 if (error == 0) 3972 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0); 3973 3974 /* Do the actual NFSv4.2 RPC. */ 3975 ret = ret2 = 0; 3976 len = *ap->a_lenp; 3977 mtx_lock(&nmp->nm_mtx); 3978 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0) 3979 consecutive = true; 3980 else 3981 consecutive = false; 3982 mtx_unlock(&nmp->nm_mtx); 3983 inoff = *ap->a_inoffp; 3984 outoff = *ap->a_outoffp; 3985 tryoutcred = true; 3986 must_commit = false; 3987 if (error == 0) { 3988 vap = &VTONFS(invp)->n_vattr.na_vattr; 3989 error = VOP_GETATTR(invp, vap, ap->a_incred); 3990 if (error == 0) { 3991 /* 3992 * Clip "len" at va_size so that RFC compliant servers 3993 * will not reply NFSERR_INVAL. 3994 * Setting "len == 0" for the RPC would be preferred, 3995 * but some Linux servers do not support that. 3996 */ 3997 if (inoff >= vap->va_size) 3998 *ap->a_lenp = len = 0; 3999 else if (inoff + len > vap->va_size) 4000 *ap->a_lenp = len = vap->va_size - inoff; 4001 } else 4002 error = 0; 4003 } 4004 4005 /* 4006 * len will be set to 0 upon a successful Copy RPC. 4007 * As such, this only loops when the Copy RPC needs to be retried. 4008 */ 4009 while (len > 0 && error == 0) { 4010 inattrflag = outattrflag = 0; 4011 len2 = len; 4012 if (tryoutcred) 4013 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4014 outvp, ap->a_outoffp, &len2, ap->a_flags, 4015 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4016 ap->a_outcred, consecutive, &must_commit); 4017 else 4018 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4019 outvp, ap->a_outoffp, &len2, ap->a_flags, 4020 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4021 ap->a_incred, consecutive, &must_commit); 4022 if (inattrflag != 0) 4023 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, 0, 1); 4024 if (outattrflag != 0) 4025 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL, 4026 1, 1); 4027 if (error == 0) { 4028 if (consecutive == false) { 4029 if (len2 == len) { 4030 mtx_lock(&nmp->nm_mtx); 4031 nmp->nm_privflag |= 4032 NFSMNTP_NOCONSECUTIVE; 4033 mtx_unlock(&nmp->nm_mtx); 4034 } else 4035 error = NFSERR_OFFLOADNOREQS; 4036 } 4037 *ap->a_lenp = len2; 4038 len = 0; 4039 if (len2 > 0 && must_commit && error == 0) 4040 error = ncl_commit(outvp, outoff, *ap->a_lenp, 4041 ap->a_outcred, curthread); 4042 if (error == 0 && ret != 0) 4043 error = ret; 4044 if (error == 0 && ret2 != 0) 4045 error = ret2; 4046 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) { 4047 /* 4048 * Try consecutive == false, which is ok only if all 4049 * bytes are copied. 4050 * If only some bytes were copied when consecutive 4051 * is false, there is no way to know which bytes 4052 * still need to be written. 4053 */ 4054 consecutive = false; 4055 error = 0; 4056 } else if (error == NFSERR_ACCES && tryoutcred) { 4057 /* Try again with incred. */ 4058 tryoutcred = false; 4059 error = 0; 4060 } 4061 if (error == NFSERR_STALEWRITEVERF) { 4062 /* 4063 * Server rebooted, so do it all again. 4064 */ 4065 *ap->a_inoffp = inoff; 4066 *ap->a_outoffp = outoff; 4067 len = *ap->a_lenp; 4068 must_commit = false; 4069 error = 0; 4070 } 4071 } 4072 VOP_UNLOCK(invp); 4073 VOP_UNLOCK(outvp); 4074 if (mp != NULL) 4075 vn_finished_write(mp); 4076 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS || 4077 error == NFSERR_ACCES) { 4078 /* 4079 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can 4080 * use a_incred for the read and a_outcred for the write, so 4081 * try this for NFSERR_ACCES failures for the Copy. 4082 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can 4083 * never succeed, so disable it. 4084 */ 4085 if (error != NFSERR_ACCES) { 4086 /* Can never do Copy on this mount. */ 4087 mtx_lock(&nmp->nm_mtx); 4088 nmp->nm_privflag |= NFSMNTP_NOCOPY; 4089 mtx_unlock(&nmp->nm_mtx); 4090 } 4091 *ap->a_inoffp = inoff; 4092 *ap->a_outoffp = outoff; 4093 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 4094 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 4095 ap->a_incred, ap->a_outcred, ap->a_fsizetd); 4096 } else if (error != 0) 4097 *ap->a_lenp = 0; 4098 4099 if (error != 0) 4100 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0); 4101 return (error); 4102 } 4103 4104 /* 4105 * nfs ioctl call 4106 */ 4107 static int 4108 nfs_ioctl(struct vop_ioctl_args *ap) 4109 { 4110 struct vnode *vp = ap->a_vp; 4111 struct nfsvattr nfsva; 4112 struct nfsmount *nmp; 4113 int attrflag, content, error, ret; 4114 bool eof = false; /* shut up compiler. */ 4115 4116 /* Do the actual NFSv4.2 RPC. */ 4117 switch (ap->a_command) { 4118 case FIOSEEKDATA: 4119 content = NFSV4CONTENT_DATA; 4120 break; 4121 case FIOSEEKHOLE: 4122 content = NFSV4CONTENT_HOLE; 4123 break; 4124 default: 4125 return (ENOTTY); 4126 } 4127 4128 error = vn_lock(vp, LK_SHARED); 4129 if (error != 0) 4130 return (EBADF); 4131 4132 if (vp->v_type != VREG) { 4133 VOP_UNLOCK(vp); 4134 return (ENOTTY); 4135 } 4136 nmp = VFSTONFS(vp->v_mount); 4137 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) { 4138 VOP_UNLOCK(vp); 4139 error = vop_stdioctl(ap); 4140 return (error); 4141 } 4142 4143 attrflag = 0; 4144 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size) 4145 error = ENXIO; 4146 else { 4147 /* 4148 * Flush all writes, so that the server is up to date. 4149 * Although a Commit is not required, the commit argument 4150 * is set so that, for a pNFS File/Flexible File Layout 4151 * server, the LayoutCommit will be done to ensure the file 4152 * size is up to date on the Metadata Server. 4153 */ 4154 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0); 4155 if (error == 0) 4156 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof, 4157 content, ap->a_cred, &nfsva, &attrflag); 4158 /* If at eof for FIOSEEKDATA, return ENXIO. */ 4159 if (eof && error == 0 && content == NFSV4CONTENT_DATA) 4160 error = ENXIO; 4161 } 4162 if (attrflag != 0) { 4163 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4164 if (error == 0 && ret != 0) 4165 error = ret; 4166 } 4167 NFSVOPUNLOCK(vp); 4168 4169 if (error != 0) 4170 error = ENXIO; 4171 return (error); 4172 } 4173 4174 /* 4175 * nfs getextattr call 4176 */ 4177 static int 4178 nfs_getextattr(struct vop_getextattr_args *ap) 4179 { 4180 struct vnode *vp = ap->a_vp; 4181 struct nfsmount *nmp; 4182 struct ucred *cred; 4183 struct thread *td = ap->a_td; 4184 struct nfsvattr nfsva; 4185 ssize_t len; 4186 int attrflag, error, ret; 4187 4188 nmp = VFSTONFS(vp->v_mount); 4189 mtx_lock(&nmp->nm_mtx); 4190 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4191 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4192 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4193 mtx_unlock(&nmp->nm_mtx); 4194 return (EOPNOTSUPP); 4195 } 4196 mtx_unlock(&nmp->nm_mtx); 4197 4198 cred = ap->a_cred; 4199 if (cred == NULL) 4200 cred = td->td_ucred; 4201 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4202 attrflag = 0; 4203 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva, 4204 &attrflag, cred, td); 4205 if (attrflag != 0) { 4206 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4207 if (error == 0 && ret != 0) 4208 error = ret; 4209 } 4210 if (error == 0 && ap->a_size != NULL) 4211 *ap->a_size = len; 4212 4213 switch (error) { 4214 case NFSERR_NOTSUPP: 4215 case NFSERR_OPILLEGAL: 4216 mtx_lock(&nmp->nm_mtx); 4217 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4218 mtx_unlock(&nmp->nm_mtx); 4219 error = EOPNOTSUPP; 4220 break; 4221 case NFSERR_NOXATTR: 4222 case NFSERR_XATTR2BIG: 4223 error = ENOATTR; 4224 break; 4225 default: 4226 error = nfscl_maperr(td, error, 0, 0); 4227 break; 4228 } 4229 return (error); 4230 } 4231 4232 /* 4233 * nfs setextattr call 4234 */ 4235 static int 4236 nfs_setextattr(struct vop_setextattr_args *ap) 4237 { 4238 struct vnode *vp = ap->a_vp; 4239 struct nfsmount *nmp; 4240 struct ucred *cred; 4241 struct thread *td = ap->a_td; 4242 struct nfsvattr nfsva; 4243 int attrflag, error, ret; 4244 4245 nmp = VFSTONFS(vp->v_mount); 4246 mtx_lock(&nmp->nm_mtx); 4247 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4248 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4249 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4250 mtx_unlock(&nmp->nm_mtx); 4251 return (EOPNOTSUPP); 4252 } 4253 mtx_unlock(&nmp->nm_mtx); 4254 4255 if (ap->a_uio->uio_resid < 0) 4256 return (EINVAL); 4257 cred = ap->a_cred; 4258 if (cred == NULL) 4259 cred = td->td_ucred; 4260 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4261 attrflag = 0; 4262 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva, 4263 &attrflag, cred, td); 4264 if (attrflag != 0) { 4265 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4266 if (error == 0 && ret != 0) 4267 error = ret; 4268 } 4269 4270 switch (error) { 4271 case NFSERR_NOTSUPP: 4272 case NFSERR_OPILLEGAL: 4273 mtx_lock(&nmp->nm_mtx); 4274 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4275 mtx_unlock(&nmp->nm_mtx); 4276 error = EOPNOTSUPP; 4277 break; 4278 case NFSERR_NOXATTR: 4279 case NFSERR_XATTR2BIG: 4280 error = ENOATTR; 4281 break; 4282 default: 4283 error = nfscl_maperr(td, error, 0, 0); 4284 break; 4285 } 4286 return (error); 4287 } 4288 4289 /* 4290 * nfs listextattr call 4291 */ 4292 static int 4293 nfs_listextattr(struct vop_listextattr_args *ap) 4294 { 4295 struct vnode *vp = ap->a_vp; 4296 struct nfsmount *nmp; 4297 struct ucred *cred; 4298 struct thread *td = ap->a_td; 4299 struct nfsvattr nfsva; 4300 size_t len, len2; 4301 uint64_t cookie; 4302 int attrflag, error, ret; 4303 bool eof; 4304 4305 nmp = VFSTONFS(vp->v_mount); 4306 mtx_lock(&nmp->nm_mtx); 4307 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4308 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4309 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4310 mtx_unlock(&nmp->nm_mtx); 4311 return (EOPNOTSUPP); 4312 } 4313 mtx_unlock(&nmp->nm_mtx); 4314 4315 cred = ap->a_cred; 4316 if (cred == NULL) 4317 cred = td->td_ucred; 4318 4319 /* Loop around doing List Extended Attribute RPCs. */ 4320 eof = false; 4321 cookie = 0; 4322 len2 = 0; 4323 error = 0; 4324 while (!eof && error == 0) { 4325 len = nmp->nm_rsize; 4326 attrflag = 0; 4327 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof, 4328 &nfsva, &attrflag, cred, td); 4329 if (attrflag != 0) { 4330 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4331 if (error == 0 && ret != 0) 4332 error = ret; 4333 } 4334 if (error == 0) { 4335 len2 += len; 4336 if (len2 > SSIZE_MAX) 4337 error = ENOATTR; 4338 } 4339 } 4340 if (error == 0 && ap->a_size != NULL) 4341 *ap->a_size = len2; 4342 4343 switch (error) { 4344 case NFSERR_NOTSUPP: 4345 case NFSERR_OPILLEGAL: 4346 mtx_lock(&nmp->nm_mtx); 4347 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4348 mtx_unlock(&nmp->nm_mtx); 4349 error = EOPNOTSUPP; 4350 break; 4351 case NFSERR_NOXATTR: 4352 case NFSERR_XATTR2BIG: 4353 error = ENOATTR; 4354 break; 4355 default: 4356 error = nfscl_maperr(td, error, 0, 0); 4357 break; 4358 } 4359 return (error); 4360 } 4361 4362 /* 4363 * nfs setextattr call 4364 */ 4365 static int 4366 nfs_deleteextattr(struct vop_deleteextattr_args *ap) 4367 { 4368 struct vnode *vp = ap->a_vp; 4369 struct nfsmount *nmp; 4370 struct nfsvattr nfsva; 4371 int attrflag, error, ret; 4372 4373 nmp = VFSTONFS(vp->v_mount); 4374 mtx_lock(&nmp->nm_mtx); 4375 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4376 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4377 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4378 mtx_unlock(&nmp->nm_mtx); 4379 return (EOPNOTSUPP); 4380 } 4381 mtx_unlock(&nmp->nm_mtx); 4382 4383 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4384 attrflag = 0; 4385 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred, 4386 ap->a_td); 4387 if (attrflag != 0) { 4388 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4389 if (error == 0 && ret != 0) 4390 error = ret; 4391 } 4392 4393 switch (error) { 4394 case NFSERR_NOTSUPP: 4395 case NFSERR_OPILLEGAL: 4396 mtx_lock(&nmp->nm_mtx); 4397 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4398 mtx_unlock(&nmp->nm_mtx); 4399 error = EOPNOTSUPP; 4400 break; 4401 case NFSERR_NOXATTR: 4402 case NFSERR_XATTR2BIG: 4403 error = ENOATTR; 4404 break; 4405 default: 4406 error = nfscl_maperr(ap->a_td, error, 0, 0); 4407 break; 4408 } 4409 return (error); 4410 } 4411 4412 /* 4413 * Return POSIX pathconf information applicable to nfs filesystems. 4414 */ 4415 static int 4416 nfs_pathconf(struct vop_pathconf_args *ap) 4417 { 4418 struct nfsv3_pathconf pc; 4419 struct nfsvattr nfsva; 4420 struct vnode *vp = ap->a_vp; 4421 struct nfsmount *nmp; 4422 struct thread *td = curthread; 4423 off_t off; 4424 bool eof; 4425 int attrflag, error; 4426 4427 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX || 4428 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED || 4429 ap->a_name == _PC_NO_TRUNC)) || 4430 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) { 4431 /* 4432 * Since only the above 4 a_names are returned by the NFSv3 4433 * Pathconf RPC, there is no point in doing it for others. 4434 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can 4435 * be used for _PC_NFS4_ACL as well. 4436 */ 4437 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva, 4438 &attrflag); 4439 if (attrflag != 0) 4440 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4441 if (error != 0) 4442 return (error); 4443 } else { 4444 /* 4445 * For NFSv2 (or NFSv3 when not one of the above 4 a_names), 4446 * just fake them. 4447 */ 4448 pc.pc_linkmax = NFS_LINK_MAX; 4449 pc.pc_namemax = NFS_MAXNAMLEN; 4450 pc.pc_notrunc = 1; 4451 pc.pc_chownrestricted = 1; 4452 pc.pc_caseinsensitive = 0; 4453 pc.pc_casepreserving = 1; 4454 error = 0; 4455 } 4456 switch (ap->a_name) { 4457 case _PC_LINK_MAX: 4458 #ifdef _LP64 4459 *ap->a_retval = pc.pc_linkmax; 4460 #else 4461 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax); 4462 #endif 4463 break; 4464 case _PC_NAME_MAX: 4465 *ap->a_retval = pc.pc_namemax; 4466 break; 4467 case _PC_PIPE_BUF: 4468 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) 4469 *ap->a_retval = PIPE_BUF; 4470 else 4471 error = EINVAL; 4472 break; 4473 case _PC_CHOWN_RESTRICTED: 4474 *ap->a_retval = pc.pc_chownrestricted; 4475 break; 4476 case _PC_NO_TRUNC: 4477 *ap->a_retval = pc.pc_notrunc; 4478 break; 4479 case _PC_ACL_NFS4: 4480 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 && 4481 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) 4482 *ap->a_retval = 1; 4483 else 4484 *ap->a_retval = 0; 4485 break; 4486 case _PC_ACL_PATH_MAX: 4487 if (NFS_ISV4(vp)) 4488 *ap->a_retval = ACL_MAX_ENTRIES; 4489 else 4490 *ap->a_retval = 3; 4491 break; 4492 case _PC_PRIO_IO: 4493 *ap->a_retval = 0; 4494 break; 4495 case _PC_SYNC_IO: 4496 *ap->a_retval = 0; 4497 break; 4498 case _PC_ALLOC_SIZE_MIN: 4499 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize; 4500 break; 4501 case _PC_FILESIZEBITS: 4502 if (NFS_ISV34(vp)) 4503 *ap->a_retval = 64; 4504 else 4505 *ap->a_retval = 32; 4506 break; 4507 case _PC_REC_INCR_XFER_SIZE: 4508 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4509 break; 4510 case _PC_REC_MAX_XFER_SIZE: 4511 *ap->a_retval = -1; /* means ``unlimited'' */ 4512 break; 4513 case _PC_REC_MIN_XFER_SIZE: 4514 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4515 break; 4516 case _PC_REC_XFER_ALIGN: 4517 *ap->a_retval = PAGE_SIZE; 4518 break; 4519 case _PC_SYMLINK_MAX: 4520 *ap->a_retval = NFS_MAXPATHLEN; 4521 break; 4522 case _PC_MIN_HOLE_SIZE: 4523 /* Only some NFSv4.2 servers support Seek for Holes. */ 4524 *ap->a_retval = 0; 4525 nmp = VFSTONFS(vp->v_mount); 4526 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) { 4527 /* 4528 * NFSv4.2 doesn't have an attribute for hole size, 4529 * so all we can do is see if the Seek operation is 4530 * supported and then use f_iosize as a "best guess". 4531 */ 4532 mtx_lock(&nmp->nm_mtx); 4533 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) { 4534 mtx_unlock(&nmp->nm_mtx); 4535 off = 0; 4536 attrflag = 0; 4537 error = nfsrpc_seek(vp, &off, &eof, 4538 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva, 4539 &attrflag); 4540 if (attrflag != 0) 4541 nfscl_loadattrcache(&vp, &nfsva, 4542 NULL, 0, 1); 4543 mtx_lock(&nmp->nm_mtx); 4544 if (error == NFSERR_NOTSUPP) 4545 nmp->nm_privflag |= NFSMNTP_SEEKTESTED; 4546 else 4547 nmp->nm_privflag |= NFSMNTP_SEEKTESTED | 4548 NFSMNTP_SEEK; 4549 error = 0; 4550 } 4551 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0) 4552 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4553 mtx_unlock(&nmp->nm_mtx); 4554 } 4555 break; 4556 4557 default: 4558 error = vop_stdpathconf(ap); 4559 break; 4560 } 4561 return (error); 4562 }
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