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 struct nfsmount *nmp; 1001 1002 nmp = VFSTONFS(vp->v_mount); 1003 /* 1004 * Update local times for special files. 1005 */ 1006 NFSLOCKNODE(np); 1007 if (np->n_flag & (NACC | NUPD)) 1008 np->n_flag |= NCHG; 1009 NFSUNLOCKNODE(np); 1010 /* 1011 * First look in the cache. 1012 * For "syskrb5" mounts, nm_fhsize might still be zero and 1013 * cached attributes should be ignored. 1014 */ 1015 if (nmp->nm_fhsize > 0 && ncl_getattrcache(vp, &vattr) == 0) { 1016 ncl_copy_vattr(vap, &vattr); 1017 1018 /* 1019 * Get the local modify time for the case of a write 1020 * delegation. 1021 */ 1022 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1023 return (0); 1024 } 1025 1026 if (NFS_ISV34(vp) && nfs_prime_access_cache && 1027 nfsaccess_cache_timeout > 0) { 1028 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses); 1029 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL); 1030 if (ncl_getattrcache(vp, ap->a_vap) == 0) { 1031 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime); 1032 return (0); 1033 } 1034 } 1035 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva); 1036 if (!error) 1037 error = nfscl_loadattrcache(&vp, &nfsva, vap, 0, 0); 1038 if (!error) { 1039 /* 1040 * Get the local modify time for the case of a write 1041 * delegation. 1042 */ 1043 nfscl_deleggetmodtime(vp, &vap->va_mtime); 1044 } else if (NFS_ISV4(vp)) { 1045 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1046 } 1047 return (error); 1048 } 1049 1050 /* 1051 * nfs setattr call. 1052 */ 1053 static int 1054 nfs_setattr(struct vop_setattr_args *ap) 1055 { 1056 struct vnode *vp = ap->a_vp; 1057 struct nfsnode *np = VTONFS(vp); 1058 struct thread *td = curthread; /* XXX */ 1059 struct vattr *vap = ap->a_vap; 1060 int error = 0; 1061 u_quad_t tsize; 1062 struct timespec ts; 1063 1064 #ifndef nolint 1065 tsize = (u_quad_t)0; 1066 #endif 1067 1068 /* 1069 * Setting of flags and marking of atimes are not supported. 1070 */ 1071 if (vap->va_flags != VNOVAL) 1072 return (EOPNOTSUPP); 1073 1074 /* 1075 * Disallow write attempts if the filesystem is mounted read-only. 1076 */ 1077 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 1078 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 1079 vap->va_mtime.tv_sec != VNOVAL || 1080 vap->va_birthtime.tv_sec != VNOVAL || 1081 vap->va_mode != (mode_t)VNOVAL) && 1082 (vp->v_mount->mnt_flag & MNT_RDONLY)) 1083 return (EROFS); 1084 if (vap->va_size != VNOVAL) { 1085 switch (vp->v_type) { 1086 case VDIR: 1087 return (EISDIR); 1088 case VCHR: 1089 case VBLK: 1090 case VSOCK: 1091 case VFIFO: 1092 if (vap->va_mtime.tv_sec == VNOVAL && 1093 vap->va_atime.tv_sec == VNOVAL && 1094 vap->va_birthtime.tv_sec == VNOVAL && 1095 vap->va_mode == (mode_t)VNOVAL && 1096 vap->va_uid == (uid_t)VNOVAL && 1097 vap->va_gid == (gid_t)VNOVAL) 1098 return (0); 1099 vap->va_size = VNOVAL; 1100 break; 1101 default: 1102 /* 1103 * Disallow write attempts if the filesystem is 1104 * mounted read-only. 1105 */ 1106 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1107 return (EROFS); 1108 /* 1109 * We run vnode_pager_setsize() early (why?), 1110 * we must set np->n_size now to avoid vinvalbuf 1111 * V_SAVE races that might setsize a lower 1112 * value. 1113 */ 1114 NFSLOCKNODE(np); 1115 tsize = np->n_size; 1116 NFSUNLOCKNODE(np); 1117 error = ncl_meta_setsize(vp, td, vap->va_size); 1118 NFSLOCKNODE(np); 1119 if (np->n_flag & NMODIFIED) { 1120 tsize = np->n_size; 1121 NFSUNLOCKNODE(np); 1122 error = ncl_vinvalbuf(vp, vap->va_size == 0 ? 1123 0 : V_SAVE, td, 1); 1124 if (error != 0) { 1125 vnode_pager_setsize(vp, tsize); 1126 return (error); 1127 } 1128 /* 1129 * Call nfscl_delegmodtime() to set the modify time 1130 * locally, as required. 1131 */ 1132 nfscl_delegmodtime(vp); 1133 } else 1134 NFSUNLOCKNODE(np); 1135 /* 1136 * np->n_size has already been set to vap->va_size 1137 * in ncl_meta_setsize(). We must set it again since 1138 * nfs_loadattrcache() could be called through 1139 * ncl_meta_setsize() and could modify np->n_size. 1140 */ 1141 NFSLOCKNODE(np); 1142 np->n_vattr.na_size = np->n_size = vap->va_size; 1143 NFSUNLOCKNODE(np); 1144 } 1145 } else { 1146 NFSLOCKNODE(np); 1147 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && 1148 (np->n_flag & NMODIFIED) && vp->v_type == VREG) { 1149 NFSUNLOCKNODE(np); 1150 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 1151 if (error == EINTR || error == EIO) 1152 return (error); 1153 } else 1154 NFSUNLOCKNODE(np); 1155 } 1156 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 1157 if (vap->va_size != VNOVAL) { 1158 if (error == 0) { 1159 nanouptime(&ts); 1160 NFSLOCKNODE(np); 1161 np->n_localmodtime = ts; 1162 NFSUNLOCKNODE(np); 1163 } else { 1164 NFSLOCKNODE(np); 1165 np->n_size = np->n_vattr.na_size = tsize; 1166 vnode_pager_setsize(vp, tsize); 1167 NFSUNLOCKNODE(np); 1168 } 1169 } 1170 return (error); 1171 } 1172 1173 /* 1174 * Do an nfs setattr rpc. 1175 */ 1176 static int 1177 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, 1178 struct thread *td) 1179 { 1180 struct nfsnode *np = VTONFS(vp); 1181 int error, ret, attrflag, i; 1182 struct nfsvattr nfsva; 1183 1184 if (NFS_ISV34(vp)) { 1185 NFSLOCKNODE(np); 1186 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 1187 np->n_accesscache[i].stamp = 0; 1188 np->n_flag |= NDELEGMOD; 1189 NFSUNLOCKNODE(np); 1190 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp); 1191 } 1192 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag); 1193 if (attrflag) { 1194 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1195 if (ret && !error) 1196 error = ret; 1197 } 1198 if (error && NFS_ISV4(vp)) 1199 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid); 1200 return (error); 1201 } 1202 1203 /* 1204 * nfs lookup call, one step at a time... 1205 * First look in cache 1206 * If not found, unlock the directory nfsnode and do the rpc 1207 */ 1208 static int 1209 nfs_lookup(struct vop_lookup_args *ap) 1210 { 1211 struct componentname *cnp = ap->a_cnp; 1212 struct vnode *dvp = ap->a_dvp; 1213 struct vnode **vpp = ap->a_vpp; 1214 struct mount *mp = dvp->v_mount; 1215 int flags = cnp->cn_flags; 1216 struct vnode *newvp; 1217 struct nfsmount *nmp; 1218 struct nfsnode *np, *newnp; 1219 int error = 0, attrflag, dattrflag, ltype, ncticks; 1220 struct thread *td = curthread; 1221 struct nfsfh *nfhp; 1222 struct nfsvattr dnfsva, nfsva; 1223 struct vattr vattr; 1224 struct timespec nctime, ts; 1225 uint32_t openmode; 1226 1227 *vpp = NULLVP; 1228 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) && 1229 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 1230 return (EROFS); 1231 if (dvp->v_type != VDIR) 1232 return (ENOTDIR); 1233 nmp = VFSTONFS(mp); 1234 np = VTONFS(dvp); 1235 1236 /* For NFSv4, wait until any remove is done. */ 1237 NFSLOCKNODE(np); 1238 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) { 1239 np->n_flag |= NREMOVEWANT; 1240 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0); 1241 } 1242 NFSUNLOCKNODE(np); 1243 1244 error = vn_dir_check_exec(dvp, cnp); 1245 if (error != 0) 1246 return (error); 1247 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks); 1248 if (error > 0 && error != ENOENT) 1249 return (error); 1250 if (error == -1) { 1251 /* 1252 * Lookups of "." are special and always return the 1253 * current directory. cache_lookup() already handles 1254 * associated locking bookkeeping, etc. 1255 */ 1256 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 1257 return (0); 1258 } 1259 1260 /* 1261 * We only accept a positive hit in the cache if the 1262 * change time of the file matches our cached copy. 1263 * Otherwise, we discard the cache entry and fallback 1264 * to doing a lookup RPC. We also only trust cache 1265 * entries for less than nm_nametimeo seconds. 1266 * 1267 * To better handle stale file handles and attributes, 1268 * clear the attribute cache of this node if it is a 1269 * leaf component, part of an open() call, and not 1270 * locally modified before fetching the attributes. 1271 * This should allow stale file handles to be detected 1272 * here where we can fall back to a LOOKUP RPC to 1273 * recover rather than having nfs_open() detect the 1274 * stale file handle and failing open(2) with ESTALE. 1275 */ 1276 newvp = *vpp; 1277 newnp = VTONFS(newvp); 1278 if (!(nmp->nm_flag & NFSMNT_NOCTO) && 1279 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1280 !(newnp->n_flag & NMODIFIED)) { 1281 NFSLOCKNODE(newnp); 1282 newnp->n_attrstamp = 0; 1283 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1284 NFSUNLOCKNODE(newnp); 1285 } 1286 if (nfscl_nodeleg(newvp, 0) == 0 || 1287 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) && 1288 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 && 1289 timespeccmp(&vattr.va_ctime, &nctime, ==))) { 1290 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1291 return (0); 1292 } 1293 cache_purge(newvp); 1294 if (dvp != newvp) 1295 vput(newvp); 1296 else 1297 vrele(newvp); 1298 *vpp = NULLVP; 1299 } else if (error == ENOENT) { 1300 if (VN_IS_DOOMED(dvp)) 1301 return (ENOENT); 1302 /* 1303 * We only accept a negative hit in the cache if the 1304 * modification time of the parent directory matches 1305 * the cached copy in the name cache entry. 1306 * Otherwise, we discard all of the negative cache 1307 * entries for this directory. We also only trust 1308 * negative cache entries for up to nm_negnametimeo 1309 * seconds. 1310 */ 1311 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) && 1312 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 && 1313 timespeccmp(&vattr.va_mtime, &nctime, ==)) { 1314 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits); 1315 return (ENOENT); 1316 } 1317 cache_purge_negative(dvp); 1318 } 1319 1320 openmode = 0; 1321 /* 1322 * If this an NFSv4.1/4.2 mount using the "oneopenown" mount 1323 * option, it is possible to do the Open operation in the same 1324 * compound as Lookup, so long as delegations are not being 1325 * issued. This saves doing a separate RPC for Open. 1326 * For pnfs, do not do this, since the Open+LayoutGet will 1327 * be needed as a separate RPC. 1328 */ 1329 NFSLOCKMNT(nmp); 1330 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && !NFSHASPNFS(nmp) && 1331 (nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 && 1332 (!NFSMNT_RDONLY(mp) || (flags & OPENWRITE) == 0) && 1333 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN)) { 1334 if ((flags & OPENREAD) != 0) 1335 openmode |= NFSV4OPEN_ACCESSREAD; 1336 if ((flags & OPENWRITE) != 0) 1337 openmode |= NFSV4OPEN_ACCESSWRITE; 1338 } 1339 NFSUNLOCKMNT(nmp); 1340 1341 newvp = NULLVP; 1342 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses); 1343 nanouptime(&ts); 1344 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1345 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1346 openmode); 1347 if (dattrflag) 1348 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1349 if (error) { 1350 if (newvp != NULLVP) { 1351 vput(newvp); 1352 *vpp = NULLVP; 1353 } 1354 1355 if (error != ENOENT) { 1356 if (NFS_ISV4(dvp)) 1357 error = nfscl_maperr(td, error, (uid_t)0, 1358 (gid_t)0); 1359 return (error); 1360 } 1361 1362 /* The requested file was not found. */ 1363 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1364 (flags & ISLASTCN)) { 1365 /* 1366 * XXX: UFS does a full VOP_ACCESS(dvp, 1367 * VWRITE) here instead of just checking 1368 * MNT_RDONLY. 1369 */ 1370 if (mp->mnt_flag & MNT_RDONLY) 1371 return (EROFS); 1372 return (EJUSTRETURN); 1373 } 1374 1375 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) { 1376 /* 1377 * Cache the modification time of the parent 1378 * directory from the post-op attributes in 1379 * the name cache entry. The negative cache 1380 * entry will be ignored once the directory 1381 * has changed. Don't bother adding the entry 1382 * if the directory has already changed. 1383 */ 1384 NFSLOCKNODE(np); 1385 if (timespeccmp(&np->n_vattr.na_mtime, 1386 &dnfsva.na_mtime, ==)) { 1387 NFSUNLOCKNODE(np); 1388 cache_enter_time(dvp, NULL, cnp, 1389 &dnfsva.na_mtime, NULL); 1390 } else 1391 NFSUNLOCKNODE(np); 1392 } 1393 return (ENOENT); 1394 } 1395 1396 /* 1397 * Handle RENAME case... 1398 */ 1399 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 1400 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1401 free(nfhp, M_NFSFH); 1402 return (EISDIR); 1403 } 1404 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, LK_EXCLUSIVE); 1405 if (error) 1406 return (error); 1407 newvp = NFSTOV(np); 1408 /* 1409 * If n_localmodtime >= time before RPC, then 1410 * a file modification operation, such as 1411 * VOP_SETATTR() of size, has occurred while 1412 * the Lookup RPC and acquisition of the vnode 1413 * happened. As such, the attributes might 1414 * be stale, with possibly an incorrect size. 1415 */ 1416 NFSLOCKNODE(np); 1417 if (timespecisset(&np->n_localmodtime) && 1418 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1419 NFSCL_DEBUG(4, "nfs_lookup: rename localmod " 1420 "stale attributes\n"); 1421 attrflag = 0; 1422 } 1423 NFSUNLOCKNODE(np); 1424 if (attrflag) 1425 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1426 *vpp = newvp; 1427 return (0); 1428 } 1429 1430 if (flags & ISDOTDOT) { 1431 ltype = NFSVOPISLOCKED(dvp); 1432 error = vfs_busy(mp, MBF_NOWAIT); 1433 if (error != 0) { 1434 vfs_ref(mp); 1435 NFSVOPUNLOCK(dvp); 1436 error = vfs_busy(mp, 0); 1437 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1438 vfs_rel(mp); 1439 if (error == 0 && VN_IS_DOOMED(dvp)) { 1440 vfs_unbusy(mp); 1441 error = ENOENT; 1442 } 1443 if (error != 0) 1444 return (error); 1445 } 1446 NFSVOPUNLOCK(dvp); 1447 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1448 cnp->cn_lkflags); 1449 if (error == 0) 1450 newvp = NFSTOV(np); 1451 vfs_unbusy(mp); 1452 if (newvp != dvp) 1453 NFSVOPLOCK(dvp, ltype | LK_RETRY); 1454 if (VN_IS_DOOMED(dvp)) { 1455 if (error == 0) { 1456 if (newvp == dvp) 1457 vrele(newvp); 1458 else 1459 vput(newvp); 1460 } 1461 error = ENOENT; 1462 } 1463 if (error != 0) 1464 return (error); 1465 if (attrflag) 1466 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1467 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1468 free(nfhp, M_NFSFH); 1469 VREF(dvp); 1470 newvp = dvp; 1471 if (attrflag) 1472 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1473 } else { 1474 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, 1475 cnp->cn_lkflags); 1476 if (error) 1477 return (error); 1478 newvp = NFSTOV(np); 1479 /* 1480 * If n_localmodtime >= time before RPC, then 1481 * a file modification operation, such as 1482 * VOP_SETATTR() of size, has occurred while 1483 * the Lookup RPC and acquisition of the vnode 1484 * happened. As such, the attributes might 1485 * be stale, with possibly an incorrect size. 1486 */ 1487 NFSLOCKNODE(np); 1488 if (timespecisset(&np->n_localmodtime) && 1489 timespeccmp(&np->n_localmodtime, &ts, >=)) { 1490 NFSCL_DEBUG(4, "nfs_lookup: localmod " 1491 "stale attributes\n"); 1492 attrflag = 0; 1493 } 1494 NFSUNLOCKNODE(np); 1495 if (attrflag) 1496 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1497 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1498 !(np->n_flag & NMODIFIED)) { 1499 /* 1500 * Flush the attribute cache when opening a 1501 * leaf node to ensure that fresh attributes 1502 * are fetched in nfs_open() since we did not 1503 * fetch attributes from the LOOKUP reply. 1504 */ 1505 NFSLOCKNODE(np); 1506 np->n_attrstamp = 0; 1507 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); 1508 NFSUNLOCKNODE(np); 1509 } 1510 } 1511 if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp && 1512 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) && 1513 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0)) 1514 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 1515 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime); 1516 *vpp = newvp; 1517 return (0); 1518 } 1519 1520 /* 1521 * nfs read call. 1522 * Just call ncl_bioread() to do the work. 1523 */ 1524 static int 1525 nfs_read(struct vop_read_args *ap) 1526 { 1527 struct vnode *vp = ap->a_vp; 1528 1529 switch (vp->v_type) { 1530 case VREG: 1531 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 1532 case VDIR: 1533 return (EISDIR); 1534 default: 1535 return (EOPNOTSUPP); 1536 } 1537 } 1538 1539 /* 1540 * nfs readlink call 1541 */ 1542 static int 1543 nfs_readlink(struct vop_readlink_args *ap) 1544 { 1545 struct vnode *vp = ap->a_vp; 1546 1547 if (vp->v_type != VLNK) 1548 return (EINVAL); 1549 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred)); 1550 } 1551 1552 /* 1553 * Do a readlink rpc. 1554 * Called by ncl_doio() from below the buffer cache. 1555 */ 1556 int 1557 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1558 { 1559 int error, ret, attrflag; 1560 struct nfsvattr nfsva; 1561 1562 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva, 1563 &attrflag); 1564 if (attrflag) { 1565 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1566 if (ret && !error) 1567 error = ret; 1568 } 1569 if (error && NFS_ISV4(vp)) 1570 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1571 return (error); 1572 } 1573 1574 /* 1575 * nfs read rpc call 1576 * Ditto above 1577 */ 1578 int 1579 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1580 { 1581 int error, ret, attrflag; 1582 struct nfsvattr nfsva; 1583 struct nfsmount *nmp; 1584 1585 nmp = VFSTONFS(vp->v_mount); 1586 error = EIO; 1587 attrflag = 0; 1588 if (NFSHASPNFS(nmp)) 1589 error = nfscl_doiods(vp, uiop, NULL, NULL, 1590 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td); 1591 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error); 1592 if (error != 0) 1593 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, 1594 &attrflag); 1595 if (attrflag) { 1596 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1597 if (ret && !error) 1598 error = ret; 1599 } 1600 if (error && NFS_ISV4(vp)) 1601 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1602 return (error); 1603 } 1604 1605 /* 1606 * nfs write call 1607 */ 1608 int 1609 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 1610 int *iomode, int *must_commit, int called_from_strategy, int ioflag) 1611 { 1612 struct nfsvattr nfsva; 1613 int error, attrflag, ret; 1614 struct nfsmount *nmp; 1615 1616 nmp = VFSTONFS(vp->v_mount); 1617 error = EIO; 1618 attrflag = 0; 1619 if (NFSHASPNFS(nmp)) 1620 error = nfscl_doiods(vp, uiop, iomode, must_commit, 1621 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td); 1622 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error); 1623 if (error != 0) 1624 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred, 1625 uiop->uio_td, &nfsva, &attrflag, called_from_strategy, 1626 ioflag); 1627 if (attrflag) { 1628 if (VTONFS(vp)->n_flag & ND_NFSV4) 1629 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 1, 1); 1630 else 1631 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 1632 if (ret && !error) 1633 error = ret; 1634 } 1635 if (DOINGASYNC(vp)) 1636 *iomode = NFSWRITE_FILESYNC; 1637 if (error && NFS_ISV4(vp)) 1638 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1639 return (error); 1640 } 1641 1642 /* 1643 * nfs mknod rpc 1644 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1645 * mode set to specify the file type and the size field for rdev. 1646 */ 1647 static int 1648 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1649 struct vattr *vap) 1650 { 1651 struct nfsvattr nfsva, dnfsva; 1652 struct vnode *newvp = NULL; 1653 struct nfsnode *np = NULL, *dnp; 1654 struct nfsfh *nfhp; 1655 struct vattr vattr; 1656 int error = 0, attrflag, dattrflag; 1657 u_int32_t rdev; 1658 1659 if (vap->va_type == VCHR || vap->va_type == VBLK) 1660 rdev = vap->va_rdev; 1661 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1662 rdev = 0xffffffff; 1663 else 1664 return (EOPNOTSUPP); 1665 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1666 return (error); 1667 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap, 1668 rdev, vap->va_type, cnp->cn_cred, curthread, &dnfsva, 1669 &nfsva, &nfhp, &attrflag, &dattrflag); 1670 if (!error) { 1671 if (!nfhp) 1672 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1673 cnp->cn_namelen, cnp->cn_cred, curthread, 1674 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1675 if (nfhp) 1676 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1677 curthread, &np, LK_EXCLUSIVE); 1678 } 1679 if (dattrflag) 1680 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1681 if (!error) { 1682 newvp = NFSTOV(np); 1683 if (attrflag != 0) { 1684 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1685 if (error != 0) 1686 vput(newvp); 1687 } 1688 } 1689 if (!error) { 1690 *vpp = newvp; 1691 } else if (NFS_ISV4(dvp)) { 1692 error = nfscl_maperr(curthread, error, vap->va_uid, 1693 vap->va_gid); 1694 } 1695 dnp = VTONFS(dvp); 1696 NFSLOCKNODE(dnp); 1697 dnp->n_flag |= NMODIFIED; 1698 if (!dattrflag) { 1699 dnp->n_attrstamp = 0; 1700 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1701 } 1702 NFSUNLOCKNODE(dnp); 1703 return (error); 1704 } 1705 1706 /* 1707 * nfs mknod vop 1708 * just call nfs_mknodrpc() to do the work. 1709 */ 1710 /* ARGSUSED */ 1711 static int 1712 nfs_mknod(struct vop_mknod_args *ap) 1713 { 1714 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap)); 1715 } 1716 1717 static struct mtx nfs_cverf_mtx; 1718 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex", 1719 MTX_DEF); 1720 1721 static nfsquad_t 1722 nfs_get_cverf(void) 1723 { 1724 static nfsquad_t cverf; 1725 nfsquad_t ret; 1726 static int cverf_initialized = 0; 1727 1728 mtx_lock(&nfs_cverf_mtx); 1729 if (cverf_initialized == 0) { 1730 cverf.lval[0] = arc4random(); 1731 cverf.lval[1] = arc4random(); 1732 cverf_initialized = 1; 1733 } else 1734 cverf.qval++; 1735 ret = cverf; 1736 mtx_unlock(&nfs_cverf_mtx); 1737 1738 return (ret); 1739 } 1740 1741 /* 1742 * nfs file create call 1743 */ 1744 static int 1745 nfs_create(struct vop_create_args *ap) 1746 { 1747 struct vnode *dvp = ap->a_dvp; 1748 struct vattr *vap = ap->a_vap; 1749 struct componentname *cnp = ap->a_cnp; 1750 struct nfsnode *np = NULL, *dnp; 1751 struct vnode *newvp = NULL; 1752 struct nfsmount *nmp; 1753 struct nfsvattr dnfsva, nfsva; 1754 struct nfsfh *nfhp; 1755 nfsquad_t cverf; 1756 int error = 0, attrflag, dattrflag, fmode = 0; 1757 struct vattr vattr; 1758 1759 /* 1760 * Oops, not for me.. 1761 */ 1762 if (vap->va_type == VSOCK) 1763 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1764 1765 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1766 return (error); 1767 if (vap->va_vaflags & VA_EXCLUSIVE) 1768 fmode |= O_EXCL; 1769 dnp = VTONFS(dvp); 1770 nmp = VFSTONFS(dvp->v_mount); 1771 again: 1772 /* For NFSv4, wait until any remove is done. */ 1773 NFSLOCKNODE(dnp); 1774 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) { 1775 dnp->n_flag |= NREMOVEWANT; 1776 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0); 1777 } 1778 NFSUNLOCKNODE(dnp); 1779 1780 cverf = nfs_get_cverf(); 1781 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1782 vap, cverf, fmode, cnp->cn_cred, curthread, &dnfsva, &nfsva, 1783 &nfhp, &attrflag, &dattrflag); 1784 if (!error) { 1785 if (nfhp == NULL) 1786 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1787 cnp->cn_namelen, cnp->cn_cred, curthread, 1788 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0); 1789 if (nfhp != NULL) 1790 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1791 curthread, &np, LK_EXCLUSIVE); 1792 } 1793 if (dattrflag) 1794 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1795 if (!error) { 1796 newvp = NFSTOV(np); 1797 if (attrflag == 0) 1798 error = nfsrpc_getattr(newvp, cnp->cn_cred, curthread, 1799 &nfsva); 1800 if (error == 0) 1801 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 1802 } 1803 if (error) { 1804 if (newvp != NULL) { 1805 vput(newvp); 1806 newvp = NULL; 1807 } 1808 if (NFS_ISV34(dvp) && (fmode & O_EXCL) && 1809 error == NFSERR_NOTSUPP) { 1810 fmode &= ~O_EXCL; 1811 goto again; 1812 } 1813 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) { 1814 if (nfscl_checksattr(vap, &nfsva)) { 1815 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred, 1816 curthread, &nfsva, &attrflag); 1817 if (error && (vap->va_uid != (uid_t)VNOVAL || 1818 vap->va_gid != (gid_t)VNOVAL)) { 1819 /* try again without setting uid/gid */ 1820 vap->va_uid = (uid_t)VNOVAL; 1821 vap->va_gid = (uid_t)VNOVAL; 1822 error = nfsrpc_setattr(newvp, vap, NULL, 1823 cnp->cn_cred, curthread, &nfsva, &attrflag); 1824 } 1825 if (attrflag) 1826 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1827 0, 1); 1828 if (error != 0) 1829 vput(newvp); 1830 } 1831 } 1832 if (!error) { 1833 if ((cnp->cn_flags & MAKEENTRY) && attrflag) { 1834 if (dvp != newvp) 1835 cache_enter_time(dvp, newvp, cnp, 1836 &nfsva.na_ctime, NULL); 1837 else 1838 printf("nfs_create: bogus NFS server returned " 1839 "the directory as the new file object\n"); 1840 } 1841 *ap->a_vpp = newvp; 1842 } else if (NFS_ISV4(dvp)) { 1843 error = nfscl_maperr(curthread, error, vap->va_uid, 1844 vap->va_gid); 1845 } 1846 NFSLOCKNODE(dnp); 1847 dnp->n_flag |= NMODIFIED; 1848 if (!dattrflag) { 1849 dnp->n_attrstamp = 0; 1850 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1851 } 1852 NFSUNLOCKNODE(dnp); 1853 return (error); 1854 } 1855 1856 /* 1857 * nfs file remove call 1858 * To try and make nfs semantics closer to ufs semantics, a file that has 1859 * other processes using the vnode is renamed instead of removed and then 1860 * removed later on the last close. 1861 * - If v_usecount > 1 1862 * If a rename is not already in the works 1863 * call nfs_sillyrename() to set it up 1864 * else 1865 * do the remove rpc 1866 */ 1867 static int 1868 nfs_remove(struct vop_remove_args *ap) 1869 { 1870 struct vnode *vp = ap->a_vp; 1871 struct vnode *dvp = ap->a_dvp; 1872 struct componentname *cnp = ap->a_cnp; 1873 struct nfsnode *np = VTONFS(vp); 1874 int error = 0; 1875 struct vattr vattr; 1876 1877 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount")); 1878 if (vp->v_type == VDIR) 1879 error = EPERM; 1880 else if (vrefcnt(vp) == 1 || (np->n_sillyrename && 1881 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && 1882 vattr.va_nlink > 1)) { 1883 /* 1884 * Purge the name cache so that the chance of a lookup for 1885 * the name succeeding while the remove is in progress is 1886 * minimized. Without node locking it can still happen, such 1887 * that an I/O op returns ESTALE, but since you get this if 1888 * another host removes the file.. 1889 */ 1890 cache_purge(vp); 1891 /* 1892 * throw away biocache buffers, mainly to avoid 1893 * unnecessary delayed writes later. 1894 */ 1895 error = ncl_vinvalbuf(vp, 0, curthread, 1); 1896 if (error != EINTR && error != EIO) 1897 /* Do the rpc */ 1898 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr, 1899 cnp->cn_namelen, cnp->cn_cred, curthread); 1900 /* 1901 * Kludge City: If the first reply to the remove rpc is lost.. 1902 * the reply to the retransmitted request will be ENOENT 1903 * since the file was in fact removed 1904 * Therefore, we cheat and return success. 1905 */ 1906 if (error == ENOENT) 1907 error = 0; 1908 } else if (!np->n_sillyrename) 1909 error = nfs_sillyrename(dvp, vp, cnp); 1910 NFSLOCKNODE(np); 1911 np->n_attrstamp = 0; 1912 NFSUNLOCKNODE(np); 1913 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 1914 return (error); 1915 } 1916 1917 /* 1918 * nfs file remove rpc called from nfs_inactive 1919 */ 1920 int 1921 ncl_removeit(struct sillyrename *sp, struct vnode *vp) 1922 { 1923 /* 1924 * Make sure that the directory vnode is still valid. 1925 * XXX we should lock sp->s_dvp here. 1926 */ 1927 if (sp->s_dvp->v_type == VBAD) 1928 return (0); 1929 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen, 1930 sp->s_cred, NULL)); 1931 } 1932 1933 /* 1934 * Nfs remove rpc, called from nfs_remove() and ncl_removeit(). 1935 */ 1936 static int 1937 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 1938 int namelen, struct ucred *cred, struct thread *td) 1939 { 1940 struct nfsvattr dnfsva; 1941 struct nfsnode *dnp = VTONFS(dvp); 1942 int error = 0, dattrflag; 1943 1944 NFSLOCKNODE(dnp); 1945 dnp->n_flag |= NREMOVEINPROG; 1946 NFSUNLOCKNODE(dnp); 1947 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva, 1948 &dattrflag); 1949 NFSLOCKNODE(dnp); 1950 if ((dnp->n_flag & NREMOVEWANT)) { 1951 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG); 1952 NFSUNLOCKNODE(dnp); 1953 wakeup((caddr_t)dnp); 1954 } else { 1955 dnp->n_flag &= ~NREMOVEINPROG; 1956 NFSUNLOCKNODE(dnp); 1957 } 1958 if (dattrflag) 1959 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 1960 NFSLOCKNODE(dnp); 1961 dnp->n_flag |= NMODIFIED; 1962 if (!dattrflag) { 1963 dnp->n_attrstamp = 0; 1964 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 1965 } 1966 NFSUNLOCKNODE(dnp); 1967 if (error && NFS_ISV4(dvp)) 1968 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1969 return (error); 1970 } 1971 1972 /* 1973 * nfs file rename call 1974 */ 1975 static int 1976 nfs_rename(struct vop_rename_args *ap) 1977 { 1978 struct vnode *fvp = ap->a_fvp; 1979 struct vnode *tvp = ap->a_tvp; 1980 struct vnode *fdvp = ap->a_fdvp; 1981 struct vnode *tdvp = ap->a_tdvp; 1982 struct componentname *tcnp = ap->a_tcnp; 1983 struct componentname *fcnp = ap->a_fcnp; 1984 struct nfsnode *fnp = VTONFS(ap->a_fvp); 1985 struct nfsnode *tdnp = VTONFS(ap->a_tdvp); 1986 struct nfsv4node *newv4 = NULL; 1987 int error; 1988 1989 /* Check for cross-device rename */ 1990 if ((fvp->v_mount != tdvp->v_mount) || 1991 (tvp && (fvp->v_mount != tvp->v_mount))) { 1992 error = EXDEV; 1993 goto out; 1994 } 1995 1996 if (fvp == tvp) { 1997 printf("nfs_rename: fvp == tvp (can't happen)\n"); 1998 error = 0; 1999 goto out; 2000 } 2001 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0) 2002 goto out; 2003 2004 /* 2005 * We have to flush B_DELWRI data prior to renaming 2006 * the file. If we don't, the delayed-write buffers 2007 * can be flushed out later after the file has gone stale 2008 * under NFSV3. NFSV2 does not have this problem because 2009 * ( as far as I can tell ) it flushes dirty buffers more 2010 * often. 2011 * 2012 * Skip the rename operation if the fsync fails, this can happen 2013 * due to the server's volume being full, when we pushed out data 2014 * that was written back to our cache earlier. Not checking for 2015 * this condition can result in potential (silent) data loss. 2016 */ 2017 error = VOP_FSYNC(fvp, MNT_WAIT, curthread); 2018 NFSVOPUNLOCK(fvp); 2019 if (!error && tvp) 2020 error = VOP_FSYNC(tvp, MNT_WAIT, curthread); 2021 if (error) 2022 goto out; 2023 2024 /* 2025 * If the tvp exists and is in use, sillyrename it before doing the 2026 * rename of the new file over it. 2027 * XXX Can't sillyrename a directory. 2028 */ 2029 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && 2030 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 2031 vput(tvp); 2032 tvp = NULL; 2033 } 2034 2035 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2036 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2037 curthread); 2038 2039 if (error == 0 && NFS_ISV4(tdvp)) { 2040 /* 2041 * For NFSv4, check to see if it is the same name and 2042 * replace the name, if it is different. 2043 */ 2044 newv4 = malloc( 2045 sizeof (struct nfsv4node) + 2046 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1, 2047 M_NFSV4NODE, M_WAITOK); 2048 NFSLOCKNODE(tdnp); 2049 NFSLOCKNODE(fnp); 2050 if (fnp->n_v4 != NULL && fvp->v_type == VREG && 2051 (fnp->n_v4->n4_namelen != tcnp->cn_namelen || 2052 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4), 2053 tcnp->cn_namelen) || 2054 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen || 2055 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2056 tdnp->n_fhp->nfh_len))) { 2057 #ifdef notdef 2058 { char nnn[100]; int nnnl; 2059 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99; 2060 bcopy(tcnp->cn_nameptr, nnn, nnnl); 2061 nnn[nnnl] = '\0'; 2062 printf("ren replace=%s\n",nnn); 2063 } 2064 #endif 2065 free(fnp->n_v4, M_NFSV4NODE); 2066 fnp->n_v4 = newv4; 2067 newv4 = NULL; 2068 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len; 2069 fnp->n_v4->n4_namelen = tcnp->cn_namelen; 2070 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 2071 tdnp->n_fhp->nfh_len); 2072 NFSBCOPY(tcnp->cn_nameptr, 2073 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen); 2074 } 2075 NFSUNLOCKNODE(tdnp); 2076 NFSUNLOCKNODE(fnp); 2077 if (newv4 != NULL) 2078 free(newv4, M_NFSV4NODE); 2079 } 2080 2081 if (fvp->v_type == VDIR) { 2082 if (tvp != NULL && tvp->v_type == VDIR) 2083 cache_purge(tdvp); 2084 cache_purge(fdvp); 2085 } 2086 2087 out: 2088 if (tdvp == tvp) 2089 vrele(tdvp); 2090 else 2091 vput(tdvp); 2092 if (tvp) 2093 vput(tvp); 2094 vrele(fdvp); 2095 vrele(fvp); 2096 /* 2097 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2098 */ 2099 if (error == ENOENT) 2100 error = 0; 2101 return (error); 2102 } 2103 2104 /* 2105 * nfs file rename rpc called from nfs_remove() above 2106 */ 2107 static int 2108 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp, 2109 struct sillyrename *sp) 2110 { 2111 2112 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen, 2113 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred, 2114 curthread)); 2115 } 2116 2117 /* 2118 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2119 */ 2120 static int 2121 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr, 2122 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr, 2123 int tnamelen, struct ucred *cred, struct thread *td) 2124 { 2125 struct nfsvattr fnfsva, tnfsva; 2126 struct nfsnode *fdnp = VTONFS(fdvp); 2127 struct nfsnode *tdnp = VTONFS(tdvp); 2128 int error = 0, fattrflag, tattrflag; 2129 2130 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp, 2131 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag, 2132 &tattrflag); 2133 NFSLOCKNODE(fdnp); 2134 fdnp->n_flag |= NMODIFIED; 2135 if (fattrflag != 0) { 2136 NFSUNLOCKNODE(fdnp); 2137 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, 0, 1); 2138 } else { 2139 fdnp->n_attrstamp = 0; 2140 NFSUNLOCKNODE(fdnp); 2141 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp); 2142 } 2143 NFSLOCKNODE(tdnp); 2144 tdnp->n_flag |= NMODIFIED; 2145 if (tattrflag != 0) { 2146 NFSUNLOCKNODE(tdnp); 2147 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, 0, 1); 2148 } else { 2149 tdnp->n_attrstamp = 0; 2150 NFSUNLOCKNODE(tdnp); 2151 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2152 } 2153 if (error && NFS_ISV4(fdvp)) 2154 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2155 return (error); 2156 } 2157 2158 /* 2159 * nfs hard link create call 2160 */ 2161 static int 2162 nfs_link(struct vop_link_args *ap) 2163 { 2164 struct vnode *vp = ap->a_vp; 2165 struct vnode *tdvp = ap->a_tdvp; 2166 struct componentname *cnp = ap->a_cnp; 2167 struct nfsnode *np, *tdnp; 2168 struct nfsvattr nfsva, dnfsva; 2169 int error = 0, attrflag, dattrflag; 2170 2171 /* 2172 * Push all writes to the server, so that the attribute cache 2173 * doesn't get "out of sync" with the server. 2174 * XXX There should be a better way! 2175 */ 2176 VOP_FSYNC(vp, MNT_WAIT, curthread); 2177 2178 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2179 cnp->cn_cred, curthread, &dnfsva, &nfsva, &attrflag, &dattrflag); 2180 tdnp = VTONFS(tdvp); 2181 NFSLOCKNODE(tdnp); 2182 tdnp->n_flag |= NMODIFIED; 2183 if (dattrflag != 0) { 2184 NFSUNLOCKNODE(tdnp); 2185 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, 0, 1); 2186 } else { 2187 tdnp->n_attrstamp = 0; 2188 NFSUNLOCKNODE(tdnp); 2189 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); 2190 } 2191 if (attrflag) 2192 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2193 else { 2194 np = VTONFS(vp); 2195 NFSLOCKNODE(np); 2196 np->n_attrstamp = 0; 2197 NFSUNLOCKNODE(np); 2198 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 2199 } 2200 /* 2201 * If negative lookup caching is enabled, I might as well 2202 * add an entry for this node. Not necessary for correctness, 2203 * but if negative caching is enabled, then the system 2204 * must care about lookup caching hit rate, so... 2205 */ 2206 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 && 2207 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2208 if (tdvp != vp) 2209 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL); 2210 else 2211 printf("nfs_link: bogus NFS server returned " 2212 "the directory as the new link\n"); 2213 } 2214 if (error && NFS_ISV4(vp)) 2215 error = nfscl_maperr(curthread, error, (uid_t)0, 2216 (gid_t)0); 2217 return (error); 2218 } 2219 2220 /* 2221 * nfs symbolic link create call 2222 */ 2223 static int 2224 nfs_symlink(struct vop_symlink_args *ap) 2225 { 2226 struct vnode *dvp = ap->a_dvp; 2227 struct vattr *vap = ap->a_vap; 2228 struct componentname *cnp = ap->a_cnp; 2229 struct nfsvattr nfsva, dnfsva; 2230 struct nfsfh *nfhp; 2231 struct nfsnode *np = NULL, *dnp; 2232 struct vnode *newvp = NULL; 2233 int error = 0, attrflag, dattrflag, ret; 2234 2235 vap->va_type = VLNK; 2236 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2237 ap->a_target, vap, cnp->cn_cred, curthread, &dnfsva, 2238 &nfsva, &nfhp, &attrflag, &dattrflag); 2239 if (nfhp) { 2240 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2241 &np, LK_EXCLUSIVE); 2242 if (!ret) 2243 newvp = NFSTOV(np); 2244 else if (!error) 2245 error = ret; 2246 } 2247 if (newvp != NULL) { 2248 if (attrflag) 2249 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 2250 } else if (!error) { 2251 /* 2252 * If we do not have an error and we could not extract the 2253 * newvp from the response due to the request being NFSv2, we 2254 * have to do a lookup in order to obtain a newvp to return. 2255 */ 2256 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2257 cnp->cn_cred, curthread, &np); 2258 if (!error) 2259 newvp = NFSTOV(np); 2260 } 2261 if (error) { 2262 if (newvp) 2263 vput(newvp); 2264 if (NFS_ISV4(dvp)) 2265 error = nfscl_maperr(curthread, error, 2266 vap->va_uid, vap->va_gid); 2267 } else { 2268 *ap->a_vpp = newvp; 2269 } 2270 2271 dnp = VTONFS(dvp); 2272 NFSLOCKNODE(dnp); 2273 dnp->n_flag |= NMODIFIED; 2274 if (dattrflag != 0) { 2275 NFSUNLOCKNODE(dnp); 2276 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2277 } else { 2278 dnp->n_attrstamp = 0; 2279 NFSUNLOCKNODE(dnp); 2280 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2281 } 2282 /* 2283 * If negative lookup caching is enabled, I might as well 2284 * add an entry for this node. Not necessary for correctness, 2285 * but if negative caching is enabled, then the system 2286 * must care about lookup caching hit rate, so... 2287 */ 2288 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2289 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) { 2290 if (dvp != newvp) 2291 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, 2292 NULL); 2293 else 2294 printf("nfs_symlink: bogus NFS server returned " 2295 "the directory as the new file object\n"); 2296 } 2297 return (error); 2298 } 2299 2300 /* 2301 * nfs make dir call 2302 */ 2303 static int 2304 nfs_mkdir(struct vop_mkdir_args *ap) 2305 { 2306 struct vnode *dvp = ap->a_dvp; 2307 struct vattr *vap = ap->a_vap; 2308 struct componentname *cnp = ap->a_cnp; 2309 struct nfsnode *np = NULL, *dnp; 2310 struct vnode *newvp = NULL; 2311 struct vattr vattr; 2312 struct nfsfh *nfhp; 2313 struct nfsvattr nfsva, dnfsva; 2314 int error = 0, attrflag, dattrflag, ret; 2315 2316 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) 2317 return (error); 2318 vap->va_type = VDIR; 2319 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2320 vap, cnp->cn_cred, curthread, &dnfsva, &nfsva, &nfhp, 2321 &attrflag, &dattrflag); 2322 dnp = VTONFS(dvp); 2323 NFSLOCKNODE(dnp); 2324 dnp->n_flag |= NMODIFIED; 2325 if (dattrflag != 0) { 2326 NFSUNLOCKNODE(dnp); 2327 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2328 } else { 2329 dnp->n_attrstamp = 0; 2330 NFSUNLOCKNODE(dnp); 2331 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2332 } 2333 if (nfhp) { 2334 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread, 2335 &np, LK_EXCLUSIVE); 2336 if (!ret) { 2337 newvp = NFSTOV(np); 2338 if (attrflag) 2339 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 2340 0, 1); 2341 } else if (!error) 2342 error = ret; 2343 } 2344 if (!error && newvp == NULL) { 2345 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2346 cnp->cn_cred, curthread, &np); 2347 if (!error) { 2348 newvp = NFSTOV(np); 2349 if (newvp->v_type != VDIR) 2350 error = EEXIST; 2351 } 2352 } 2353 if (error) { 2354 if (newvp) 2355 vput(newvp); 2356 if (NFS_ISV4(dvp)) 2357 error = nfscl_maperr(curthread, error, 2358 vap->va_uid, vap->va_gid); 2359 } else { 2360 /* 2361 * If negative lookup caching is enabled, I might as well 2362 * add an entry for this node. Not necessary for correctness, 2363 * but if negative caching is enabled, then the system 2364 * must care about lookup caching hit rate, so... 2365 */ 2366 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2367 (cnp->cn_flags & MAKEENTRY) && 2368 attrflag != 0 && dattrflag != 0) { 2369 if (dvp != newvp) 2370 cache_enter_time(dvp, newvp, cnp, 2371 &nfsva.na_ctime, &dnfsva.na_ctime); 2372 else 2373 printf("nfs_mkdir: bogus NFS server returned " 2374 "the directory that the directory was " 2375 "created in as the new file object\n"); 2376 } 2377 *ap->a_vpp = newvp; 2378 } 2379 return (error); 2380 } 2381 2382 /* 2383 * nfs remove directory call 2384 */ 2385 static int 2386 nfs_rmdir(struct vop_rmdir_args *ap) 2387 { 2388 struct vnode *vp = ap->a_vp; 2389 struct vnode *dvp = ap->a_dvp; 2390 struct componentname *cnp = ap->a_cnp; 2391 struct nfsnode *dnp; 2392 struct nfsvattr dnfsva; 2393 int error, dattrflag; 2394 2395 if (dvp == vp) 2396 return (EINVAL); 2397 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2398 cnp->cn_cred, curthread, &dnfsva, &dattrflag); 2399 dnp = VTONFS(dvp); 2400 NFSLOCKNODE(dnp); 2401 dnp->n_flag |= NMODIFIED; 2402 if (dattrflag != 0) { 2403 NFSUNLOCKNODE(dnp); 2404 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2405 } else { 2406 dnp->n_attrstamp = 0; 2407 NFSUNLOCKNODE(dnp); 2408 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); 2409 } 2410 2411 cache_purge(dvp); 2412 cache_purge(vp); 2413 if (error && NFS_ISV4(dvp)) 2414 error = nfscl_maperr(curthread, error, (uid_t)0, 2415 (gid_t)0); 2416 /* 2417 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2418 */ 2419 if (error == ENOENT) 2420 error = 0; 2421 return (error); 2422 } 2423 2424 /* 2425 * nfs readdir call 2426 */ 2427 static int 2428 nfs_readdir(struct vop_readdir_args *ap) 2429 { 2430 struct vnode *vp = ap->a_vp; 2431 struct nfsnode *np = VTONFS(vp); 2432 struct uio *uio = ap->a_uio; 2433 ssize_t tresid, left; 2434 int error = 0; 2435 struct vattr vattr; 2436 2437 if (ap->a_eofflag != NULL) 2438 *ap->a_eofflag = 0; 2439 if (vp->v_type != VDIR) 2440 return(EPERM); 2441 2442 /* 2443 * First, check for hit on the EOF offset cache 2444 */ 2445 NFSLOCKNODE(np); 2446 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2447 (np->n_flag & NMODIFIED) == 0) { 2448 NFSUNLOCKNODE(np); 2449 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) { 2450 NFSLOCKNODE(np); 2451 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) || 2452 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 2453 NFSUNLOCKNODE(np); 2454 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits); 2455 if (ap->a_eofflag != NULL) 2456 *ap->a_eofflag = 1; 2457 return (0); 2458 } else 2459 NFSUNLOCKNODE(np); 2460 } 2461 } else 2462 NFSUNLOCKNODE(np); 2463 2464 /* 2465 * NFS always guarantees that directory entries don't straddle 2466 * DIRBLKSIZ boundaries. As such, we need to limit the size 2467 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial 2468 * directory entry. 2469 */ 2470 left = uio->uio_resid % DIRBLKSIZ; 2471 if (left == uio->uio_resid) 2472 return (EINVAL); 2473 uio->uio_resid -= left; 2474 2475 /* 2476 * Call ncl_bioread() to do the real work. 2477 */ 2478 tresid = uio->uio_resid; 2479 error = ncl_bioread(vp, uio, 0, ap->a_cred); 2480 2481 if (!error && uio->uio_resid == tresid) { 2482 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses); 2483 if (ap->a_eofflag != NULL) 2484 *ap->a_eofflag = 1; 2485 } 2486 2487 /* Add the partial DIRBLKSIZ (left) back in. */ 2488 uio->uio_resid += left; 2489 return (error); 2490 } 2491 2492 /* 2493 * Readdir rpc call. 2494 * Called from below the buffer cache by ncl_doio(). 2495 */ 2496 int 2497 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2498 struct thread *td) 2499 { 2500 struct nfsvattr nfsva; 2501 nfsuint64 *cookiep, cookie; 2502 struct nfsnode *dnp = VTONFS(vp); 2503 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2504 int error = 0, eof, attrflag; 2505 2506 KASSERT(uiop->uio_iovcnt == 1 && 2507 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2508 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2509 ("nfs readdirrpc bad uio")); 2510 2511 /* 2512 * If there is no cookie, assume directory was stale. 2513 */ 2514 ncl_dircookie_lock(dnp); 2515 NFSUNLOCKNODE(dnp); 2516 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2517 if (cookiep) { 2518 cookie = *cookiep; 2519 ncl_dircookie_unlock(dnp); 2520 } else { 2521 ncl_dircookie_unlock(dnp); 2522 return (NFSERR_BAD_COOKIE); 2523 } 2524 2525 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2526 (void)ncl_fsinfo(nmp, vp, cred, td); 2527 2528 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva, 2529 &attrflag, &eof); 2530 if (attrflag) 2531 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2532 2533 if (!error) { 2534 /* 2535 * We are now either at the end of the directory or have filled 2536 * the block. 2537 */ 2538 if (eof) { 2539 NFSLOCKNODE(dnp); 2540 dnp->n_direofoffset = uiop->uio_offset; 2541 NFSUNLOCKNODE(dnp); 2542 } else { 2543 if (uiop->uio_resid > 0) 2544 printf("EEK! readdirrpc resid > 0\n"); 2545 ncl_dircookie_lock(dnp); 2546 NFSUNLOCKNODE(dnp); 2547 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2548 *cookiep = cookie; 2549 ncl_dircookie_unlock(dnp); 2550 } 2551 } else if (NFS_ISV4(vp)) { 2552 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2553 } 2554 return (error); 2555 } 2556 2557 /* 2558 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc(). 2559 */ 2560 int 2561 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2562 struct thread *td) 2563 { 2564 struct nfsvattr nfsva; 2565 nfsuint64 *cookiep, cookie; 2566 struct nfsnode *dnp = VTONFS(vp); 2567 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2568 int error = 0, attrflag, eof; 2569 2570 KASSERT(uiop->uio_iovcnt == 1 && 2571 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2572 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2573 ("nfs readdirplusrpc bad uio")); 2574 2575 /* 2576 * If there is no cookie, assume directory was stale. 2577 */ 2578 ncl_dircookie_lock(dnp); 2579 NFSUNLOCKNODE(dnp); 2580 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2581 if (cookiep) { 2582 cookie = *cookiep; 2583 ncl_dircookie_unlock(dnp); 2584 } else { 2585 ncl_dircookie_unlock(dnp); 2586 return (NFSERR_BAD_COOKIE); 2587 } 2588 2589 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2590 (void)ncl_fsinfo(nmp, vp, cred, td); 2591 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva, 2592 &attrflag, &eof); 2593 if (attrflag) 2594 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2595 2596 if (!error) { 2597 /* 2598 * We are now either at end of the directory or have filled the 2599 * the block. 2600 */ 2601 if (eof) { 2602 NFSLOCKNODE(dnp); 2603 dnp->n_direofoffset = uiop->uio_offset; 2604 NFSUNLOCKNODE(dnp); 2605 } else { 2606 if (uiop->uio_resid > 0) 2607 printf("EEK! readdirplusrpc resid > 0\n"); 2608 ncl_dircookie_lock(dnp); 2609 NFSUNLOCKNODE(dnp); 2610 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2611 *cookiep = cookie; 2612 ncl_dircookie_unlock(dnp); 2613 } 2614 } else if (NFS_ISV4(vp)) { 2615 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2616 } 2617 return (error); 2618 } 2619 2620 /* 2621 * Silly rename. To make the NFS filesystem that is stateless look a little 2622 * more like the "ufs" a remove of an active vnode is translated to a rename 2623 * to a funny looking filename that is removed by nfs_inactive on the 2624 * nfsnode. There is the potential for another process on a different client 2625 * to create the same funny name between the nfs_lookitup() fails and the 2626 * nfs_rename() completes, but... 2627 */ 2628 static int 2629 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2630 { 2631 struct sillyrename *sp; 2632 struct nfsnode *np; 2633 int error; 2634 short pid; 2635 unsigned int lticks; 2636 2637 cache_purge(dvp); 2638 np = VTONFS(vp); 2639 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir")); 2640 sp = malloc(sizeof (struct sillyrename), 2641 M_NEWNFSREQ, M_WAITOK); 2642 sp->s_cred = crhold(cnp->cn_cred); 2643 sp->s_dvp = dvp; 2644 VREF(dvp); 2645 2646 /* 2647 * Fudge together a funny name. 2648 * Changing the format of the funny name to accommodate more 2649 * sillynames per directory. 2650 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is 2651 * CPU ticks since boot. 2652 */ 2653 pid = curthread->td_proc->p_pid; 2654 lticks = (unsigned int)ticks; 2655 for ( ; ; ) { 2656 sp->s_namlen = sprintf(sp->s_name, 2657 ".nfs.%08x.%04x4.4", lticks, 2658 pid); 2659 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2660 curthread, NULL)) 2661 break; 2662 lticks++; 2663 } 2664 error = nfs_renameit(dvp, vp, cnp, sp); 2665 if (error) 2666 goto bad; 2667 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2668 curthread, &np); 2669 np->n_sillyrename = sp; 2670 return (0); 2671 bad: 2672 vrele(sp->s_dvp); 2673 crfree(sp->s_cred); 2674 free(sp, M_NEWNFSREQ); 2675 return (error); 2676 } 2677 2678 /* 2679 * Look up a file name and optionally either update the file handle or 2680 * allocate an nfsnode, depending on the value of npp. 2681 * npp == NULL --> just do the lookup 2682 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2683 * handled too 2684 * *npp != NULL --> update the file handle in the vnode 2685 */ 2686 static int 2687 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred, 2688 struct thread *td, struct nfsnode **npp) 2689 { 2690 struct vnode *newvp = NULL, *vp; 2691 struct nfsnode *np, *dnp = VTONFS(dvp); 2692 struct nfsfh *nfhp, *onfhp; 2693 struct nfsvattr nfsva, dnfsva; 2694 struct componentname cn; 2695 int error = 0, attrflag, dattrflag; 2696 u_int hash; 2697 struct timespec ts; 2698 2699 nanouptime(&ts); 2700 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva, 2701 &nfhp, &attrflag, &dattrflag, 0); 2702 if (dattrflag) 2703 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1); 2704 if (npp && !error) { 2705 if (*npp != NULL) { 2706 np = *npp; 2707 vp = NFSTOV(np); 2708 /* 2709 * For NFSv4, check to see if it is the same name and 2710 * replace the name, if it is different. 2711 */ 2712 if (np->n_v4 != NULL && nfsva.na_type == VREG && 2713 (np->n_v4->n4_namelen != len || 2714 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) || 2715 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 2716 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2717 dnp->n_fhp->nfh_len))) { 2718 #ifdef notdef 2719 { char nnn[100]; int nnnl; 2720 nnnl = (len < 100) ? len : 99; 2721 bcopy(name, nnn, nnnl); 2722 nnn[nnnl] = '\0'; 2723 printf("replace=%s\n",nnn); 2724 } 2725 #endif 2726 free(np->n_v4, M_NFSV4NODE); 2727 np->n_v4 = malloc( 2728 sizeof (struct nfsv4node) + 2729 dnp->n_fhp->nfh_len + len - 1, 2730 M_NFSV4NODE, M_WAITOK); 2731 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 2732 np->n_v4->n4_namelen = len; 2733 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2734 dnp->n_fhp->nfh_len); 2735 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len); 2736 } 2737 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, 2738 FNV1_32_INIT); 2739 onfhp = np->n_fhp; 2740 /* 2741 * Rehash node for new file handle. 2742 */ 2743 vfs_hash_rehash(vp, hash); 2744 np->n_fhp = nfhp; 2745 if (onfhp != NULL) 2746 free(onfhp, M_NFSFH); 2747 newvp = NFSTOV(np); 2748 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) { 2749 free(nfhp, M_NFSFH); 2750 VREF(dvp); 2751 newvp = dvp; 2752 } else { 2753 cn.cn_nameptr = name; 2754 cn.cn_namelen = len; 2755 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td, 2756 &np, LK_EXCLUSIVE); 2757 if (error) 2758 return (error); 2759 newvp = NFSTOV(np); 2760 /* 2761 * If n_localmodtime >= time before RPC, then 2762 * a file modification operation, such as 2763 * VOP_SETATTR() of size, has occurred while 2764 * the Lookup RPC and acquisition of the vnode 2765 * happened. As such, the attributes might 2766 * be stale, with possibly an incorrect size. 2767 */ 2768 NFSLOCKNODE(np); 2769 if (timespecisset(&np->n_localmodtime) && 2770 timespeccmp(&np->n_localmodtime, &ts, >=)) { 2771 NFSCL_DEBUG(4, "nfs_lookitup: localmod " 2772 "stale attributes\n"); 2773 attrflag = 0; 2774 } 2775 NFSUNLOCKNODE(np); 2776 } 2777 if (!attrflag && *npp == NULL) { 2778 if (newvp == dvp) 2779 vrele(newvp); 2780 else 2781 vput(newvp); 2782 return (ENOENT); 2783 } 2784 if (attrflag) 2785 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1); 2786 } 2787 if (npp && *npp == NULL) { 2788 if (error) { 2789 if (newvp) { 2790 if (newvp == dvp) 2791 vrele(newvp); 2792 else 2793 vput(newvp); 2794 } 2795 } else 2796 *npp = np; 2797 } 2798 if (error && NFS_ISV4(dvp)) 2799 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2800 return (error); 2801 } 2802 2803 /* 2804 * Nfs Version 3 and 4 commit rpc 2805 */ 2806 int 2807 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, 2808 struct thread *td) 2809 { 2810 struct nfsvattr nfsva; 2811 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2812 struct nfsnode *np; 2813 struct uio uio; 2814 int error, attrflag; 2815 2816 np = VTONFS(vp); 2817 error = EIO; 2818 attrflag = 0; 2819 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) { 2820 uio.uio_offset = offset; 2821 uio.uio_resid = cnt; 2822 error = nfscl_doiods(vp, &uio, NULL, NULL, 2823 NFSV4OPEN_ACCESSWRITE, 1, cred, td); 2824 if (error != 0) { 2825 NFSLOCKNODE(np); 2826 np->n_flag &= ~NDSCOMMIT; 2827 NFSUNLOCKNODE(np); 2828 } 2829 } 2830 if (error != 0) { 2831 mtx_lock(&nmp->nm_mtx); 2832 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { 2833 mtx_unlock(&nmp->nm_mtx); 2834 return (0); 2835 } 2836 mtx_unlock(&nmp->nm_mtx); 2837 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva, 2838 &attrflag); 2839 } 2840 if (attrflag != 0) 2841 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 2842 if (error != 0 && NFS_ISV4(vp)) 2843 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2844 return (error); 2845 } 2846 2847 /* 2848 * Strategy routine. 2849 * For async requests when nfsiod(s) are running, queue the request by 2850 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the 2851 * request. 2852 */ 2853 static int 2854 nfs_strategy(struct vop_strategy_args *ap) 2855 { 2856 struct buf *bp; 2857 struct vnode *vp; 2858 struct ucred *cr; 2859 2860 bp = ap->a_bp; 2861 vp = ap->a_vp; 2862 KASSERT(bp->b_vp == vp, ("missing b_getvp")); 2863 KASSERT(!(bp->b_flags & B_DONE), 2864 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); 2865 2866 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno) 2867 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize / 2868 DEV_BSIZE); 2869 if (bp->b_iocmd == BIO_READ) 2870 cr = bp->b_rcred; 2871 else 2872 cr = bp->b_wcred; 2873 2874 /* 2875 * If the op is asynchronous and an i/o daemon is waiting 2876 * queue the request, wake it up and wait for completion 2877 * otherwise just do it ourselves. 2878 */ 2879 if ((bp->b_flags & B_ASYNC) == 0 || 2880 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread)) 2881 (void) ncl_doio(vp, bp, cr, curthread, 1); 2882 return (0); 2883 } 2884 2885 /* 2886 * fsync vnode op. Just call ncl_flush() with commit == 1. 2887 */ 2888 /* ARGSUSED */ 2889 static int 2890 nfs_fsync(struct vop_fsync_args *ap) 2891 { 2892 2893 if (ap->a_vp->v_type != VREG) { 2894 /* 2895 * For NFS, metadata is changed synchronously on the server, 2896 * so there is nothing to flush. Also, ncl_flush() clears 2897 * the NMODIFIED flag and that shouldn't be done here for 2898 * directories. 2899 */ 2900 return (0); 2901 } 2902 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0)); 2903 } 2904 2905 /* 2906 * Flush all the blocks associated with a vnode. 2907 * Walk through the buffer pool and push any dirty pages 2908 * associated with the vnode. 2909 * If the called_from_renewthread argument is TRUE, it has been called 2910 * from the NFSv4 renew thread and, as such, cannot block indefinitely 2911 * waiting for a buffer write to complete. 2912 */ 2913 int 2914 ncl_flush(struct vnode *vp, int waitfor, struct thread *td, 2915 int commit, int called_from_renewthread) 2916 { 2917 struct nfsnode *np = VTONFS(vp); 2918 struct buf *bp; 2919 int i; 2920 struct buf *nbp; 2921 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2922 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2923 int passone = 1, trycnt = 0; 2924 u_quad_t off, endoff, toff; 2925 struct ucred* wcred = NULL; 2926 struct buf **bvec = NULL; 2927 struct bufobj *bo; 2928 #ifndef NFS_COMMITBVECSIZ 2929 #define NFS_COMMITBVECSIZ 20 2930 #endif 2931 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2932 u_int bvecsize = 0, bveccount; 2933 struct timespec ts; 2934 2935 if (called_from_renewthread != 0) 2936 slptimeo = hz; 2937 if (nmp->nm_flag & NFSMNT_INT) 2938 slpflag = PCATCH; 2939 if (!commit) 2940 passone = 0; 2941 bo = &vp->v_bufobj; 2942 /* 2943 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2944 * server, but has not been committed to stable storage on the server 2945 * yet. On the first pass, the byte range is worked out and the commit 2946 * rpc is done. On the second pass, ncl_writebp() is called to do the 2947 * job. 2948 */ 2949 again: 2950 off = (u_quad_t)-1; 2951 endoff = 0; 2952 bvecpos = 0; 2953 if (NFS_ISV34(vp) && commit) { 2954 if (bvec != NULL && bvec != bvec_on_stack) 2955 free(bvec, M_TEMP); 2956 /* 2957 * Count up how many buffers waiting for a commit. 2958 */ 2959 bveccount = 0; 2960 BO_LOCK(bo); 2961 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2962 if (!BUF_ISLOCKED(bp) && 2963 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2964 == (B_DELWRI | B_NEEDCOMMIT)) 2965 bveccount++; 2966 } 2967 /* 2968 * Allocate space to remember the list of bufs to commit. It is 2969 * important to use M_NOWAIT here to avoid a race with nfs_write. 2970 * If we can't get memory (for whatever reason), we will end up 2971 * committing the buffers one-by-one in the loop below. 2972 */ 2973 if (bveccount > NFS_COMMITBVECSIZ) { 2974 /* 2975 * Release the vnode interlock to avoid a lock 2976 * order reversal. 2977 */ 2978 BO_UNLOCK(bo); 2979 bvec = (struct buf **) 2980 malloc(bveccount * sizeof(struct buf *), 2981 M_TEMP, M_NOWAIT); 2982 BO_LOCK(bo); 2983 if (bvec == NULL) { 2984 bvec = bvec_on_stack; 2985 bvecsize = NFS_COMMITBVECSIZ; 2986 } else 2987 bvecsize = bveccount; 2988 } else { 2989 bvec = bvec_on_stack; 2990 bvecsize = NFS_COMMITBVECSIZ; 2991 } 2992 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2993 if (bvecpos >= bvecsize) 2994 break; 2995 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2996 nbp = TAILQ_NEXT(bp, b_bobufs); 2997 continue; 2998 } 2999 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3000 (B_DELWRI | B_NEEDCOMMIT)) { 3001 BUF_UNLOCK(bp); 3002 nbp = TAILQ_NEXT(bp, b_bobufs); 3003 continue; 3004 } 3005 BO_UNLOCK(bo); 3006 bremfree(bp); 3007 /* 3008 * Work out if all buffers are using the same cred 3009 * so we can deal with them all with one commit. 3010 * 3011 * NOTE: we are not clearing B_DONE here, so we have 3012 * to do it later on in this routine if we intend to 3013 * initiate I/O on the bp. 3014 * 3015 * Note: to avoid loopback deadlocks, we do not 3016 * assign b_runningbufspace. 3017 */ 3018 if (wcred == NULL) 3019 wcred = bp->b_wcred; 3020 else if (wcred != bp->b_wcred) 3021 wcred = NOCRED; 3022 vfs_busy_pages(bp, 0); 3023 3024 BO_LOCK(bo); 3025 /* 3026 * bp is protected by being locked, but nbp is not 3027 * and vfs_busy_pages() may sleep. We have to 3028 * recalculate nbp. 3029 */ 3030 nbp = TAILQ_NEXT(bp, b_bobufs); 3031 3032 /* 3033 * A list of these buffers is kept so that the 3034 * second loop knows which buffers have actually 3035 * been committed. This is necessary, since there 3036 * may be a race between the commit rpc and new 3037 * uncommitted writes on the file. 3038 */ 3039 bvec[bvecpos++] = bp; 3040 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3041 bp->b_dirtyoff; 3042 if (toff < off) 3043 off = toff; 3044 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 3045 if (toff > endoff) 3046 endoff = toff; 3047 } 3048 BO_UNLOCK(bo); 3049 } 3050 if (bvecpos > 0) { 3051 /* 3052 * Commit data on the server, as required. 3053 * If all bufs are using the same wcred, then use that with 3054 * one call for all of them, otherwise commit each one 3055 * separately. 3056 */ 3057 if (wcred != NOCRED) 3058 retv = ncl_commit(vp, off, (int)(endoff - off), 3059 wcred, td); 3060 else { 3061 retv = 0; 3062 for (i = 0; i < bvecpos; i++) { 3063 off_t off, size; 3064 bp = bvec[i]; 3065 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 3066 bp->b_dirtyoff; 3067 size = (u_quad_t)(bp->b_dirtyend 3068 - bp->b_dirtyoff); 3069 retv = ncl_commit(vp, off, (int)size, 3070 bp->b_wcred, td); 3071 if (retv) break; 3072 } 3073 } 3074 3075 if (retv == NFSERR_STALEWRITEVERF) 3076 ncl_clearcommit(vp->v_mount); 3077 3078 /* 3079 * Now, either mark the blocks I/O done or mark the 3080 * blocks dirty, depending on whether the commit 3081 * succeeded. 3082 */ 3083 for (i = 0; i < bvecpos; i++) { 3084 bp = bvec[i]; 3085 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3086 if (!NFSCL_FORCEDISM(vp->v_mount) && retv) { 3087 /* 3088 * Error, leave B_DELWRI intact 3089 */ 3090 vfs_unbusy_pages(bp); 3091 brelse(bp); 3092 } else { 3093 /* 3094 * Success, remove B_DELWRI ( bundirty() ). 3095 * 3096 * b_dirtyoff/b_dirtyend seem to be NFS 3097 * specific. We should probably move that 3098 * into bundirty(). XXX 3099 */ 3100 bufobj_wref(bo); 3101 bp->b_flags |= B_ASYNC; 3102 bundirty(bp); 3103 bp->b_flags &= ~B_DONE; 3104 bp->b_ioflags &= ~BIO_ERROR; 3105 bp->b_dirtyoff = bp->b_dirtyend = 0; 3106 bufdone(bp); 3107 } 3108 } 3109 } 3110 3111 /* 3112 * Start/do any write(s) that are required. 3113 */ 3114 loop: 3115 BO_LOCK(bo); 3116 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 3117 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 3118 if (waitfor != MNT_WAIT || passone) 3119 continue; 3120 3121 error = BUF_TIMELOCK(bp, 3122 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 3123 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo); 3124 if (error == 0) { 3125 BUF_UNLOCK(bp); 3126 goto loop; 3127 } 3128 if (error == ENOLCK) { 3129 error = 0; 3130 goto loop; 3131 } 3132 if (called_from_renewthread != 0) { 3133 /* 3134 * Return EIO so the flush will be retried 3135 * later. 3136 */ 3137 error = EIO; 3138 goto done; 3139 } 3140 if (newnfs_sigintr(nmp, td)) { 3141 error = EINTR; 3142 goto done; 3143 } 3144 if (slpflag == PCATCH) { 3145 slpflag = 0; 3146 slptimeo = 2 * hz; 3147 } 3148 goto loop; 3149 } 3150 if ((bp->b_flags & B_DELWRI) == 0) 3151 panic("nfs_fsync: not dirty"); 3152 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { 3153 BUF_UNLOCK(bp); 3154 continue; 3155 } 3156 BO_UNLOCK(bo); 3157 bremfree(bp); 3158 bp->b_flags |= B_ASYNC; 3159 bwrite(bp); 3160 if (newnfs_sigintr(nmp, td)) { 3161 error = EINTR; 3162 goto done; 3163 } 3164 goto loop; 3165 } 3166 if (passone) { 3167 passone = 0; 3168 BO_UNLOCK(bo); 3169 goto again; 3170 } 3171 if (waitfor == MNT_WAIT) { 3172 while (bo->bo_numoutput) { 3173 error = bufobj_wwait(bo, slpflag, slptimeo); 3174 if (error) { 3175 BO_UNLOCK(bo); 3176 if (called_from_renewthread != 0) { 3177 /* 3178 * Return EIO so that the flush will be 3179 * retried later. 3180 */ 3181 error = EIO; 3182 goto done; 3183 } 3184 error = newnfs_sigintr(nmp, td); 3185 if (error) 3186 goto done; 3187 if (slpflag == PCATCH) { 3188 slpflag = 0; 3189 slptimeo = 2 * hz; 3190 } 3191 BO_LOCK(bo); 3192 } 3193 } 3194 if (bo->bo_dirty.bv_cnt != 0 && commit) { 3195 BO_UNLOCK(bo); 3196 goto loop; 3197 } 3198 /* 3199 * Wait for all the async IO requests to drain 3200 */ 3201 BO_UNLOCK(bo); 3202 NFSLOCKNODE(np); 3203 while (np->n_directio_asyncwr > 0) { 3204 np->n_flag |= NFSYNCWAIT; 3205 error = newnfs_msleep(td, &np->n_directio_asyncwr, 3206 &np->n_mtx, slpflag | (PRIBIO + 1), 3207 "nfsfsync", 0); 3208 if (error) { 3209 if (newnfs_sigintr(nmp, td)) { 3210 NFSUNLOCKNODE(np); 3211 error = EINTR; 3212 goto done; 3213 } 3214 } 3215 } 3216 NFSUNLOCKNODE(np); 3217 } else 3218 BO_UNLOCK(bo); 3219 if (NFSHASPNFS(nmp)) { 3220 nfscl_layoutcommit(vp, td); 3221 /* 3222 * Invalidate the attribute cache, since writes to a DS 3223 * won't update the size attribute. 3224 */ 3225 NFSLOCKNODE(np); 3226 np->n_attrstamp = 0; 3227 } else 3228 NFSLOCKNODE(np); 3229 if (np->n_flag & NWRITEERR) { 3230 error = np->n_error; 3231 np->n_flag &= ~NWRITEERR; 3232 } 3233 if (commit && bo->bo_dirty.bv_cnt == 0 && 3234 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0) 3235 np->n_flag &= ~NMODIFIED; 3236 NFSUNLOCKNODE(np); 3237 done: 3238 if (bvec != NULL && bvec != bvec_on_stack) 3239 free(bvec, M_TEMP); 3240 if (error == 0 && commit != 0 && waitfor == MNT_WAIT && 3241 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 || 3242 np->n_directio_asyncwr != 0)) { 3243 if (trycnt++ < 5) { 3244 /* try, try again... */ 3245 passone = 1; 3246 wcred = NULL; 3247 bvec = NULL; 3248 bvecsize = 0; 3249 goto again; 3250 } 3251 vn_printf(vp, "ncl_flush failed"); 3252 error = called_from_renewthread != 0 ? EIO : EBUSY; 3253 } 3254 if (error == 0) { 3255 nanouptime(&ts); 3256 NFSLOCKNODE(np); 3257 np->n_localmodtime = ts; 3258 NFSUNLOCKNODE(np); 3259 } 3260 return (error); 3261 } 3262 3263 /* 3264 * NFS advisory byte-level locks. 3265 */ 3266 static int 3267 nfs_advlock(struct vop_advlock_args *ap) 3268 { 3269 struct vnode *vp = ap->a_vp; 3270 struct ucred *cred; 3271 struct nfsnode *np = VTONFS(ap->a_vp); 3272 struct proc *p = (struct proc *)ap->a_id; 3273 struct thread *td = curthread; /* XXX */ 3274 struct vattr va; 3275 int ret, error; 3276 u_quad_t size; 3277 struct nfsmount *nmp; 3278 3279 error = NFSVOPLOCK(vp, LK_SHARED); 3280 if (error != 0) 3281 return (EBADF); 3282 nmp = VFSTONFS(vp->v_mount); 3283 if (!NFS_ISV4(vp) || (nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3284 if ((nmp->nm_flag & NFSMNT_NOLOCKD) != 0) { 3285 size = np->n_size; 3286 NFSVOPUNLOCK(vp); 3287 error = lf_advlock(ap, &(vp->v_lockf), size); 3288 } else { 3289 if (nfs_advlock_p != NULL) 3290 error = nfs_advlock_p(ap); 3291 else { 3292 NFSVOPUNLOCK(vp); 3293 error = ENOLCK; 3294 } 3295 } 3296 if (error == 0 && ap->a_op == F_SETLK) { 3297 error = NFSVOPLOCK(vp, LK_SHARED); 3298 if (error == 0) { 3299 /* Mark that a file lock has been acquired. */ 3300 NFSLOCKNODE(np); 3301 np->n_flag |= NHASBEENLOCKED; 3302 NFSUNLOCKNODE(np); 3303 NFSVOPUNLOCK(vp); 3304 } 3305 } 3306 return (error); 3307 } else if ((ap->a_flags & (F_POSIX | F_FLOCK)) != 0) { 3308 if (vp->v_type != VREG) { 3309 error = EINVAL; 3310 goto out; 3311 } 3312 if ((ap->a_flags & F_POSIX) != 0) 3313 cred = p->p_ucred; 3314 else 3315 cred = td->td_ucred; 3316 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 3317 if (VN_IS_DOOMED(vp)) { 3318 error = EBADF; 3319 goto out; 3320 } 3321 3322 /* 3323 * If this is unlocking a write locked region, flush and 3324 * commit them before unlocking. This is required by 3325 * RFC3530 Sec. 9.3.2. 3326 */ 3327 if (ap->a_op == F_UNLCK && 3328 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id, 3329 ap->a_flags)) 3330 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0); 3331 3332 /* 3333 * Mark NFS node as might have acquired a lock. 3334 * This is separate from NHASBEENLOCKED, because it must 3335 * be done before the nfsrpc_advlock() call, which might 3336 * add a nfscllock structure to the client state. 3337 * It is used to check for the case where a nfscllock 3338 * state structure cannot exist for the file. 3339 * Only done for "oneopenown" NFSv4.1/4.2 mounts. 3340 */ 3341 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) { 3342 NFSLOCKNODE(np); 3343 np->n_flag |= NMIGHTBELOCKED; 3344 NFSUNLOCKNODE(np); 3345 } 3346 3347 /* 3348 * Loop around doing the lock op, while a blocking lock 3349 * must wait for the lock op to succeed. 3350 */ 3351 do { 3352 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op, 3353 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags); 3354 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3355 ap->a_op == F_SETLK) { 3356 NFSVOPUNLOCK(vp); 3357 error = nfs_catnap(PZERO | PCATCH, ret, 3358 "ncladvl"); 3359 if (error) 3360 return (EINTR); 3361 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3362 if (VN_IS_DOOMED(vp)) { 3363 error = EBADF; 3364 goto out; 3365 } 3366 } 3367 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 3368 ap->a_op == F_SETLK); 3369 if (ret == NFSERR_DENIED) { 3370 error = EAGAIN; 3371 goto out; 3372 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) { 3373 error = ret; 3374 goto out; 3375 } else if (ret != 0) { 3376 error = EACCES; 3377 goto out; 3378 } 3379 3380 /* 3381 * Now, if we just got a lock, invalidate data in the buffer 3382 * cache, as required, so that the coherency conforms with 3383 * RFC3530 Sec. 9.3.2. 3384 */ 3385 if (ap->a_op == F_SETLK) { 3386 if ((np->n_flag & NMODIFIED) == 0) { 3387 np->n_attrstamp = 0; 3388 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3389 ret = VOP_GETATTR(vp, &va, cred); 3390 } 3391 if ((np->n_flag & NMODIFIED) || ret || 3392 np->n_change != va.va_filerev) { 3393 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1); 3394 np->n_attrstamp = 0; 3395 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 3396 ret = VOP_GETATTR(vp, &va, cred); 3397 if (!ret) { 3398 np->n_mtime = va.va_mtime; 3399 np->n_change = va.va_filerev; 3400 } 3401 } 3402 /* Mark that a file lock has been acquired. */ 3403 NFSLOCKNODE(np); 3404 np->n_flag |= NHASBEENLOCKED; 3405 NFSUNLOCKNODE(np); 3406 } 3407 } else 3408 error = EOPNOTSUPP; 3409 out: 3410 NFSVOPUNLOCK(vp); 3411 return (error); 3412 } 3413 3414 /* 3415 * NFS advisory byte-level locks. 3416 */ 3417 static int 3418 nfs_advlockasync(struct vop_advlockasync_args *ap) 3419 { 3420 struct vnode *vp = ap->a_vp; 3421 u_quad_t size; 3422 int error; 3423 3424 error = NFSVOPLOCK(vp, LK_SHARED); 3425 if (error) 3426 return (error); 3427 if (NFS_ISV4(vp)) { 3428 NFSVOPUNLOCK(vp); 3429 return (EOPNOTSUPP); 3430 } 3431 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 3432 size = VTONFS(vp)->n_size; 3433 NFSVOPUNLOCK(vp); 3434 error = lf_advlockasync(ap, &(vp->v_lockf), size); 3435 } else { 3436 NFSVOPUNLOCK(vp); 3437 error = EOPNOTSUPP; 3438 } 3439 return (error); 3440 } 3441 3442 /* 3443 * Print out the contents of an nfsnode. 3444 */ 3445 static int 3446 nfs_print(struct vop_print_args *ap) 3447 { 3448 struct vnode *vp = ap->a_vp; 3449 struct nfsnode *np = VTONFS(vp); 3450 3451 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid, 3452 (uintmax_t)np->n_vattr.na_fsid); 3453 if (vp->v_type == VFIFO) 3454 fifo_printinfo(vp); 3455 printf("\n"); 3456 return (0); 3457 } 3458 3459 /* 3460 * This is the "real" nfs::bwrite(struct buf*). 3461 * We set B_CACHE if this is a VMIO buffer. 3462 */ 3463 int 3464 ncl_writebp(struct buf *bp, int force __unused, struct thread *td) 3465 { 3466 int oldflags, rtval; 3467 3468 if (bp->b_flags & B_INVAL) { 3469 brelse(bp); 3470 return (0); 3471 } 3472 3473 oldflags = bp->b_flags; 3474 bp->b_flags |= B_CACHE; 3475 3476 /* 3477 * Undirty the bp. We will redirty it later if the I/O fails. 3478 */ 3479 bundirty(bp); 3480 bp->b_flags &= ~B_DONE; 3481 bp->b_ioflags &= ~BIO_ERROR; 3482 bp->b_iocmd = BIO_WRITE; 3483 3484 bufobj_wref(bp->b_bufobj); 3485 curthread->td_ru.ru_oublock++; 3486 3487 /* 3488 * Note: to avoid loopback deadlocks, we do not 3489 * assign b_runningbufspace. 3490 */ 3491 vfs_busy_pages(bp, 1); 3492 3493 BUF_KERNPROC(bp); 3494 bp->b_iooffset = dbtob(bp->b_blkno); 3495 bstrategy(bp); 3496 3497 if ((oldflags & B_ASYNC) != 0) 3498 return (0); 3499 3500 rtval = bufwait(bp); 3501 if (oldflags & B_DELWRI) 3502 reassignbuf(bp); 3503 brelse(bp); 3504 return (rtval); 3505 } 3506 3507 /* 3508 * nfs special file access vnode op. 3509 * Essentially just get vattr and then imitate iaccess() since the device is 3510 * local to the client. 3511 */ 3512 static int 3513 nfsspec_access(struct vop_access_args *ap) 3514 { 3515 struct vattr *vap; 3516 struct ucred *cred = ap->a_cred; 3517 struct vnode *vp = ap->a_vp; 3518 accmode_t accmode = ap->a_accmode; 3519 struct vattr vattr; 3520 int error; 3521 3522 /* 3523 * Disallow write attempts on filesystems mounted read-only; 3524 * unless the file is a socket, fifo, or a block or character 3525 * device resident on the filesystem. 3526 */ 3527 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3528 switch (vp->v_type) { 3529 case VREG: 3530 case VDIR: 3531 case VLNK: 3532 return (EROFS); 3533 default: 3534 break; 3535 } 3536 } 3537 vap = &vattr; 3538 error = VOP_GETATTR(vp, vap, cred); 3539 if (error) 3540 goto out; 3541 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, 3542 accmode, cred); 3543 out: 3544 return error; 3545 } 3546 3547 /* 3548 * Read wrapper for fifos. 3549 */ 3550 static int 3551 nfsfifo_read(struct vop_read_args *ap) 3552 { 3553 struct nfsnode *np = VTONFS(ap->a_vp); 3554 int error; 3555 3556 /* 3557 * Set access flag. 3558 */ 3559 NFSLOCKNODE(np); 3560 np->n_flag |= NACC; 3561 vfs_timestamp(&np->n_atim); 3562 NFSUNLOCKNODE(np); 3563 error = fifo_specops.vop_read(ap); 3564 return error; 3565 } 3566 3567 /* 3568 * Write wrapper for fifos. 3569 */ 3570 static int 3571 nfsfifo_write(struct vop_write_args *ap) 3572 { 3573 struct nfsnode *np = VTONFS(ap->a_vp); 3574 3575 /* 3576 * Set update flag. 3577 */ 3578 NFSLOCKNODE(np); 3579 np->n_flag |= NUPD; 3580 vfs_timestamp(&np->n_mtim); 3581 NFSUNLOCKNODE(np); 3582 return(fifo_specops.vop_write(ap)); 3583 } 3584 3585 /* 3586 * Close wrapper for fifos. 3587 * 3588 * Update the times on the nfsnode then do fifo close. 3589 */ 3590 static int 3591 nfsfifo_close(struct vop_close_args *ap) 3592 { 3593 struct vnode *vp = ap->a_vp; 3594 struct nfsnode *np = VTONFS(vp); 3595 struct vattr vattr; 3596 struct timespec ts; 3597 3598 NFSLOCKNODE(np); 3599 if (np->n_flag & (NACC | NUPD)) { 3600 vfs_timestamp(&ts); 3601 if (np->n_flag & NACC) 3602 np->n_atim = ts; 3603 if (np->n_flag & NUPD) 3604 np->n_mtim = ts; 3605 np->n_flag |= NCHG; 3606 if (vrefcnt(vp) == 1 && 3607 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3608 VATTR_NULL(&vattr); 3609 if (np->n_flag & NACC) 3610 vattr.va_atime = np->n_atim; 3611 if (np->n_flag & NUPD) 3612 vattr.va_mtime = np->n_mtim; 3613 NFSUNLOCKNODE(np); 3614 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3615 goto out; 3616 } 3617 } 3618 NFSUNLOCKNODE(np); 3619 out: 3620 return (fifo_specops.vop_close(ap)); 3621 } 3622 3623 /* 3624 * Just call ncl_writebp() with the force argument set to 1. 3625 * 3626 * NOTE: B_DONE may or may not be set in a_bp on call. 3627 */ 3628 static int 3629 nfs_bwrite(struct buf *bp) 3630 { 3631 3632 return (ncl_writebp(bp, 1, curthread)); 3633 } 3634 3635 struct buf_ops buf_ops_newnfs = { 3636 .bop_name = "buf_ops_nfs", 3637 .bop_write = nfs_bwrite, 3638 .bop_strategy = bufstrategy, 3639 .bop_sync = bufsync, 3640 .bop_bdflush = bufbdflush, 3641 }; 3642 3643 static int 3644 nfs_getacl(struct vop_getacl_args *ap) 3645 { 3646 int error; 3647 3648 if (ap->a_type != ACL_TYPE_NFS4) 3649 return (EOPNOTSUPP); 3650 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3651 if (error > NFSERR_STALE) { 3652 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3653 error = EPERM; 3654 } 3655 return (error); 3656 } 3657 3658 static int 3659 nfs_setacl(struct vop_setacl_args *ap) 3660 { 3661 int error; 3662 3663 if (ap->a_type != ACL_TYPE_NFS4) 3664 return (EOPNOTSUPP); 3665 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp); 3666 if (error > NFSERR_STALE) { 3667 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3668 error = EPERM; 3669 } 3670 return (error); 3671 } 3672 3673 /* 3674 * VOP_ADVISE for NFS. 3675 * Just return 0 for any errors, since it is just a hint. 3676 */ 3677 static int 3678 nfs_advise(struct vop_advise_args *ap) 3679 { 3680 struct thread *td = curthread; 3681 struct nfsmount *nmp; 3682 uint64_t len; 3683 int error; 3684 3685 /* 3686 * First do vop_stdadvise() to handle the buffer cache. 3687 */ 3688 error = vop_stdadvise(ap); 3689 if (error != 0) 3690 return (error); 3691 if (ap->a_start < 0 || ap->a_end < 0) 3692 return (0); 3693 if (ap->a_end == OFF_MAX) 3694 len = 0; 3695 else if (ap->a_end < ap->a_start) 3696 return (0); 3697 else 3698 len = ap->a_end - ap->a_start + 1; 3699 nmp = VFSTONFS(ap->a_vp->v_mount); 3700 mtx_lock(&nmp->nm_mtx); 3701 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 3702 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) == 3703 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) { 3704 mtx_unlock(&nmp->nm_mtx); 3705 return (0); 3706 } 3707 mtx_unlock(&nmp->nm_mtx); 3708 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice, 3709 td->td_ucred, td); 3710 if (error == NFSERR_NOTSUPP) { 3711 mtx_lock(&nmp->nm_mtx); 3712 nmp->nm_privflag |= NFSMNTP_NOADVISE; 3713 mtx_unlock(&nmp->nm_mtx); 3714 } 3715 return (0); 3716 } 3717 3718 /* 3719 * nfs allocate call 3720 */ 3721 static int 3722 nfs_allocate(struct vop_allocate_args *ap) 3723 { 3724 struct vnode *vp = ap->a_vp; 3725 struct thread *td = curthread; 3726 struct nfsvattr nfsva; 3727 struct nfsmount *nmp; 3728 struct nfsnode *np; 3729 off_t alen; 3730 int attrflag, error, ret; 3731 struct timespec ts; 3732 struct uio io; 3733 3734 attrflag = 0; 3735 nmp = VFSTONFS(vp->v_mount); 3736 np = VTONFS(vp); 3737 mtx_lock(&nmp->nm_mtx); 3738 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3739 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) { 3740 mtx_unlock(&nmp->nm_mtx); 3741 alen = *ap->a_len; 3742 if ((uint64_t)alen > nfs_maxalloclen) 3743 alen = nfs_maxalloclen; 3744 3745 /* Check the file size limit. */ 3746 io.uio_offset = *ap->a_offset; 3747 io.uio_resid = alen; 3748 error = vn_rlimit_fsize(vp, &io, td); 3749 3750 /* 3751 * Flush first to ensure that the allocate adds to the 3752 * file's allocation on the server. 3753 */ 3754 if (error == 0) 3755 error = ncl_flush(vp, MNT_WAIT, td, 1, 0); 3756 if (error == 0) 3757 error = nfsrpc_allocate(vp, *ap->a_offset, alen, 3758 &nfsva, &attrflag, ap->a_cred, td); 3759 if (error == 0) { 3760 *ap->a_offset += alen; 3761 *ap->a_len -= alen; 3762 nanouptime(&ts); 3763 NFSLOCKNODE(np); 3764 np->n_localmodtime = ts; 3765 NFSUNLOCKNODE(np); 3766 } else if (error == NFSERR_NOTSUPP) { 3767 mtx_lock(&nmp->nm_mtx); 3768 nmp->nm_privflag |= NFSMNTP_NOALLOCATE; 3769 mtx_unlock(&nmp->nm_mtx); 3770 error = EINVAL; 3771 } 3772 } else { 3773 mtx_unlock(&nmp->nm_mtx); 3774 error = EINVAL; 3775 } 3776 if (attrflag != 0) { 3777 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3778 if (error == 0 && ret != 0) 3779 error = ret; 3780 } 3781 if (error != 0) 3782 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3783 return (error); 3784 } 3785 3786 /* 3787 * nfs deallocate call 3788 */ 3789 static int 3790 nfs_deallocate(struct vop_deallocate_args *ap) 3791 { 3792 struct vnode *vp = ap->a_vp; 3793 struct thread *td = curthread; 3794 struct nfsvattr nfsva; 3795 struct nfsmount *nmp; 3796 struct nfsnode *np; 3797 off_t tlen, mlen; 3798 int attrflag, error, ret; 3799 bool clipped; 3800 struct timespec ts; 3801 3802 error = 0; 3803 attrflag = 0; 3804 nmp = VFSTONFS(vp->v_mount); 3805 np = VTONFS(vp); 3806 mtx_lock(&nmp->nm_mtx); 3807 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && 3808 (nmp->nm_privflag & NFSMNTP_NODEALLOCATE) == 0) { 3809 mtx_unlock(&nmp->nm_mtx); 3810 tlen = omin(OFF_MAX - *ap->a_offset, *ap->a_len); 3811 NFSCL_DEBUG(4, "dealloc: off=%jd len=%jd maxfilesize=%ju\n", 3812 (intmax_t)*ap->a_offset, (intmax_t)tlen, 3813 (uintmax_t)nmp->nm_maxfilesize); 3814 if ((uint64_t)*ap->a_offset >= nmp->nm_maxfilesize) { 3815 /* Avoid EFBIG error return from the NFSv4.2 server. */ 3816 *ap->a_len = 0; 3817 return (0); 3818 } 3819 clipped = false; 3820 if ((uint64_t)*ap->a_offset + tlen > nmp->nm_maxfilesize) 3821 tlen = nmp->nm_maxfilesize - *ap->a_offset; 3822 if ((uint64_t)*ap->a_offset < np->n_size) { 3823 /* Limit the len to nfs_maxalloclen before EOF. */ 3824 mlen = omin((off_t)np->n_size - *ap->a_offset, tlen); 3825 if ((uint64_t)mlen > nfs_maxalloclen) { 3826 NFSCL_DEBUG(4, "dealloc: tlen maxalloclen\n"); 3827 tlen = nfs_maxalloclen; 3828 clipped = true; 3829 } 3830 } 3831 if (error == 0) 3832 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 3833 if (error == 0) { 3834 vnode_pager_purge_range(vp, *ap->a_offset, 3835 *ap->a_offset + tlen); 3836 error = nfsrpc_deallocate(vp, *ap->a_offset, tlen, 3837 &nfsva, &attrflag, ap->a_cred, td); 3838 NFSCL_DEBUG(4, "dealloc: rpc=%d\n", error); 3839 } 3840 if (error == 0) { 3841 NFSCL_DEBUG(4, "dealloc: attrflag=%d na_size=%ju\n", 3842 attrflag, (uintmax_t)nfsva.na_size); 3843 nanouptime(&ts); 3844 NFSLOCKNODE(np); 3845 np->n_localmodtime = ts; 3846 NFSUNLOCKNODE(np); 3847 if (attrflag != 0) { 3848 if ((uint64_t)*ap->a_offset < nfsva.na_size) 3849 *ap->a_offset += omin((off_t) 3850 nfsva.na_size - *ap->a_offset, 3851 tlen); 3852 } 3853 if (clipped && tlen < *ap->a_len) 3854 *ap->a_len -= tlen; 3855 else 3856 *ap->a_len = 0; 3857 } else if (error == NFSERR_NOTSUPP) { 3858 mtx_lock(&nmp->nm_mtx); 3859 nmp->nm_privflag |= NFSMNTP_NODEALLOCATE; 3860 mtx_unlock(&nmp->nm_mtx); 3861 } 3862 } else { 3863 mtx_unlock(&nmp->nm_mtx); 3864 error = EIO; 3865 } 3866 /* 3867 * If the NFS server cannot perform the Deallocate operation, just call 3868 * vop_stddeallocate() to perform it. 3869 */ 3870 if (error != 0 && error != NFSERR_FBIG && error != NFSERR_INVAL) { 3871 error = vop_stddeallocate(ap); 3872 NFSCL_DEBUG(4, "dealloc: stddeallocate=%d\n", error); 3873 } 3874 if (attrflag != 0) { 3875 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 3876 if (error == 0 && ret != 0) 3877 error = ret; 3878 } 3879 if (error != 0) 3880 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 3881 return (error); 3882 } 3883 3884 /* 3885 * nfs copy_file_range call 3886 */ 3887 static int 3888 nfs_copy_file_range(struct vop_copy_file_range_args *ap) 3889 { 3890 struct vnode *invp = ap->a_invp; 3891 struct vnode *outvp = ap->a_outvp; 3892 struct mount *mp; 3893 struct nfsvattr innfsva, outnfsva; 3894 struct vattr *vap; 3895 struct uio io; 3896 struct nfsmount *nmp; 3897 size_t len, len2; 3898 ssize_t r; 3899 int error, inattrflag, outattrflag, ret, ret2; 3900 off_t inoff, outoff; 3901 bool consecutive, must_commit, tryoutcred; 3902 3903 /* NFSv4.2 Copy is not permitted for infile == outfile. */ 3904 if (invp == outvp) { 3905 generic_copy: 3906 return (vn_generic_copy_file_range(invp, ap->a_inoffp, 3907 outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 3908 ap->a_incred, ap->a_outcred, ap->a_fsizetd)); 3909 } 3910 3911 /* Lock both vnodes, avoiding risk of deadlock. */ 3912 do { 3913 mp = NULL; 3914 error = vn_start_write(outvp, &mp, V_WAIT); 3915 if (error == 0) { 3916 error = vn_lock(outvp, LK_EXCLUSIVE); 3917 if (error == 0) { 3918 error = vn_lock(invp, LK_SHARED | LK_NOWAIT); 3919 if (error == 0) 3920 break; 3921 VOP_UNLOCK(outvp); 3922 if (mp != NULL) 3923 vn_finished_write(mp); 3924 mp = NULL; 3925 error = vn_lock(invp, LK_SHARED); 3926 if (error == 0) 3927 VOP_UNLOCK(invp); 3928 } 3929 } 3930 if (mp != NULL) 3931 vn_finished_write(mp); 3932 } while (error == 0); 3933 if (error != 0) 3934 return (error); 3935 3936 /* 3937 * More reasons to avoid nfs copy: not NFSv4.2, or explicitly 3938 * disabled. 3939 */ 3940 nmp = VFSTONFS(invp->v_mount); 3941 mtx_lock(&nmp->nm_mtx); 3942 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 3943 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0) { 3944 mtx_unlock(&nmp->nm_mtx); 3945 VOP_UNLOCK(invp); 3946 VOP_UNLOCK(outvp); 3947 if (mp != NULL) 3948 vn_finished_write(mp); 3949 goto generic_copy; 3950 } 3951 mtx_unlock(&nmp->nm_mtx); 3952 3953 /* 3954 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer? 3955 */ 3956 io.uio_offset = *ap->a_outoffp; 3957 io.uio_resid = *ap->a_lenp; 3958 error = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd); 3959 *ap->a_lenp = io.uio_resid; 3960 /* 3961 * No need to call vn_rlimit_fsizex_res before return, since the uio is 3962 * local. 3963 */ 3964 3965 /* 3966 * Flush the input file so that the data is up to date before 3967 * the copy. Flush writes for the output file so that they 3968 * do not overwrite the data copied to the output file by the Copy. 3969 * Set the commit argument for both flushes so that the data is on 3970 * stable storage before the Copy RPC. This is done in case the 3971 * server reboots during the Copy and needs to be redone. 3972 */ 3973 if (error == 0) 3974 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0); 3975 if (error == 0) 3976 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0); 3977 3978 /* Do the actual NFSv4.2 RPC. */ 3979 ret = ret2 = 0; 3980 len = *ap->a_lenp; 3981 mtx_lock(&nmp->nm_mtx); 3982 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0) 3983 consecutive = true; 3984 else 3985 consecutive = false; 3986 mtx_unlock(&nmp->nm_mtx); 3987 inoff = *ap->a_inoffp; 3988 outoff = *ap->a_outoffp; 3989 tryoutcred = true; 3990 must_commit = false; 3991 if (error == 0) { 3992 vap = &VTONFS(invp)->n_vattr.na_vattr; 3993 error = VOP_GETATTR(invp, vap, ap->a_incred); 3994 if (error == 0) { 3995 /* 3996 * Clip "len" at va_size so that RFC compliant servers 3997 * will not reply NFSERR_INVAL. 3998 * Setting "len == 0" for the RPC would be preferred, 3999 * but some Linux servers do not support that. 4000 */ 4001 if (inoff >= vap->va_size) 4002 *ap->a_lenp = len = 0; 4003 else if (inoff + len > vap->va_size) 4004 *ap->a_lenp = len = vap->va_size - inoff; 4005 } else 4006 error = 0; 4007 } 4008 4009 /* 4010 * len will be set to 0 upon a successful Copy RPC. 4011 * As such, this only loops when the Copy RPC needs to be retried. 4012 */ 4013 while (len > 0 && error == 0) { 4014 inattrflag = outattrflag = 0; 4015 len2 = len; 4016 if (tryoutcred) 4017 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4018 outvp, ap->a_outoffp, &len2, ap->a_flags, 4019 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4020 ap->a_outcred, consecutive, &must_commit); 4021 else 4022 error = nfsrpc_copy_file_range(invp, ap->a_inoffp, 4023 outvp, ap->a_outoffp, &len2, ap->a_flags, 4024 &inattrflag, &innfsva, &outattrflag, &outnfsva, 4025 ap->a_incred, consecutive, &must_commit); 4026 if (inattrflag != 0) 4027 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, 0, 1); 4028 if (outattrflag != 0) 4029 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL, 4030 1, 1); 4031 if (error == 0) { 4032 if (consecutive == false) { 4033 if (len2 == len) { 4034 mtx_lock(&nmp->nm_mtx); 4035 nmp->nm_privflag |= 4036 NFSMNTP_NOCONSECUTIVE; 4037 mtx_unlock(&nmp->nm_mtx); 4038 } else 4039 error = NFSERR_OFFLOADNOREQS; 4040 } 4041 *ap->a_lenp = len2; 4042 len = 0; 4043 if (len2 > 0 && must_commit && error == 0) 4044 error = ncl_commit(outvp, outoff, *ap->a_lenp, 4045 ap->a_outcred, curthread); 4046 if (error == 0 && ret != 0) 4047 error = ret; 4048 if (error == 0 && ret2 != 0) 4049 error = ret2; 4050 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) { 4051 /* 4052 * Try consecutive == false, which is ok only if all 4053 * bytes are copied. 4054 * If only some bytes were copied when consecutive 4055 * is false, there is no way to know which bytes 4056 * still need to be written. 4057 */ 4058 consecutive = false; 4059 error = 0; 4060 } else if (error == NFSERR_ACCES && tryoutcred) { 4061 /* Try again with incred. */ 4062 tryoutcred = false; 4063 error = 0; 4064 } 4065 if (error == NFSERR_STALEWRITEVERF) { 4066 /* 4067 * Server rebooted, so do it all again. 4068 */ 4069 *ap->a_inoffp = inoff; 4070 *ap->a_outoffp = outoff; 4071 len = *ap->a_lenp; 4072 must_commit = false; 4073 error = 0; 4074 } 4075 } 4076 VOP_UNLOCK(invp); 4077 VOP_UNLOCK(outvp); 4078 if (mp != NULL) 4079 vn_finished_write(mp); 4080 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS || 4081 error == NFSERR_ACCES) { 4082 /* 4083 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can 4084 * use a_incred for the read and a_outcred for the write, so 4085 * try this for NFSERR_ACCES failures for the Copy. 4086 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can 4087 * never succeed, so disable it. 4088 */ 4089 if (error != NFSERR_ACCES) { 4090 /* Can never do Copy on this mount. */ 4091 mtx_lock(&nmp->nm_mtx); 4092 nmp->nm_privflag |= NFSMNTP_NOCOPY; 4093 mtx_unlock(&nmp->nm_mtx); 4094 } 4095 *ap->a_inoffp = inoff; 4096 *ap->a_outoffp = outoff; 4097 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 4098 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 4099 ap->a_incred, ap->a_outcred, ap->a_fsizetd); 4100 } else if (error != 0) 4101 *ap->a_lenp = 0; 4102 4103 if (error != 0) 4104 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0); 4105 return (error); 4106 } 4107 4108 /* 4109 * nfs ioctl call 4110 */ 4111 static int 4112 nfs_ioctl(struct vop_ioctl_args *ap) 4113 { 4114 struct vnode *vp = ap->a_vp; 4115 struct nfsvattr nfsva; 4116 struct nfsmount *nmp; 4117 int attrflag, content, error, ret; 4118 bool eof = false; /* shut up compiler. */ 4119 4120 /* Do the actual NFSv4.2 RPC. */ 4121 switch (ap->a_command) { 4122 case FIOSEEKDATA: 4123 content = NFSV4CONTENT_DATA; 4124 break; 4125 case FIOSEEKHOLE: 4126 content = NFSV4CONTENT_HOLE; 4127 break; 4128 default: 4129 return (ENOTTY); 4130 } 4131 4132 error = vn_lock(vp, LK_SHARED); 4133 if (error != 0) 4134 return (EBADF); 4135 4136 if (vp->v_type != VREG) { 4137 VOP_UNLOCK(vp); 4138 return (ENOTTY); 4139 } 4140 nmp = VFSTONFS(vp->v_mount); 4141 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) { 4142 VOP_UNLOCK(vp); 4143 error = vop_stdioctl(ap); 4144 return (error); 4145 } 4146 4147 attrflag = 0; 4148 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size) 4149 error = ENXIO; 4150 else { 4151 /* 4152 * Flush all writes, so that the server is up to date. 4153 * Although a Commit is not required, the commit argument 4154 * is set so that, for a pNFS File/Flexible File Layout 4155 * server, the LayoutCommit will be done to ensure the file 4156 * size is up to date on the Metadata Server. 4157 */ 4158 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0); 4159 if (error == 0) 4160 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof, 4161 content, ap->a_cred, &nfsva, &attrflag); 4162 /* If at eof for FIOSEEKDATA, return ENXIO. */ 4163 if (eof && error == 0 && content == NFSV4CONTENT_DATA) 4164 error = ENXIO; 4165 } 4166 if (attrflag != 0) { 4167 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4168 if (error == 0 && ret != 0) 4169 error = ret; 4170 } 4171 NFSVOPUNLOCK(vp); 4172 4173 if (error != 0) 4174 error = ENXIO; 4175 return (error); 4176 } 4177 4178 /* 4179 * nfs getextattr call 4180 */ 4181 static int 4182 nfs_getextattr(struct vop_getextattr_args *ap) 4183 { 4184 struct vnode *vp = ap->a_vp; 4185 struct nfsmount *nmp; 4186 struct ucred *cred; 4187 struct thread *td = ap->a_td; 4188 struct nfsvattr nfsva; 4189 ssize_t len; 4190 int attrflag, error, ret; 4191 4192 nmp = VFSTONFS(vp->v_mount); 4193 mtx_lock(&nmp->nm_mtx); 4194 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4195 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4196 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4197 mtx_unlock(&nmp->nm_mtx); 4198 return (EOPNOTSUPP); 4199 } 4200 mtx_unlock(&nmp->nm_mtx); 4201 4202 cred = ap->a_cred; 4203 if (cred == NULL) 4204 cred = td->td_ucred; 4205 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4206 attrflag = 0; 4207 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva, 4208 &attrflag, cred, td); 4209 if (attrflag != 0) { 4210 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4211 if (error == 0 && ret != 0) 4212 error = ret; 4213 } 4214 if (error == 0 && ap->a_size != NULL) 4215 *ap->a_size = len; 4216 4217 switch (error) { 4218 case NFSERR_NOTSUPP: 4219 case NFSERR_OPILLEGAL: 4220 mtx_lock(&nmp->nm_mtx); 4221 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4222 mtx_unlock(&nmp->nm_mtx); 4223 error = EOPNOTSUPP; 4224 break; 4225 case NFSERR_NOXATTR: 4226 case NFSERR_XATTR2BIG: 4227 error = ENOATTR; 4228 break; 4229 default: 4230 error = nfscl_maperr(td, error, 0, 0); 4231 break; 4232 } 4233 return (error); 4234 } 4235 4236 /* 4237 * nfs setextattr call 4238 */ 4239 static int 4240 nfs_setextattr(struct vop_setextattr_args *ap) 4241 { 4242 struct vnode *vp = ap->a_vp; 4243 struct nfsmount *nmp; 4244 struct ucred *cred; 4245 struct thread *td = ap->a_td; 4246 struct nfsvattr nfsva; 4247 int attrflag, error, ret; 4248 4249 nmp = VFSTONFS(vp->v_mount); 4250 mtx_lock(&nmp->nm_mtx); 4251 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4252 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4253 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4254 mtx_unlock(&nmp->nm_mtx); 4255 return (EOPNOTSUPP); 4256 } 4257 mtx_unlock(&nmp->nm_mtx); 4258 4259 if (ap->a_uio->uio_resid < 0) 4260 return (EINVAL); 4261 cred = ap->a_cred; 4262 if (cred == NULL) 4263 cred = td->td_ucred; 4264 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4265 attrflag = 0; 4266 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva, 4267 &attrflag, cred, td); 4268 if (attrflag != 0) { 4269 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4270 if (error == 0 && ret != 0) 4271 error = ret; 4272 } 4273 4274 switch (error) { 4275 case NFSERR_NOTSUPP: 4276 case NFSERR_OPILLEGAL: 4277 mtx_lock(&nmp->nm_mtx); 4278 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4279 mtx_unlock(&nmp->nm_mtx); 4280 error = EOPNOTSUPP; 4281 break; 4282 case NFSERR_NOXATTR: 4283 case NFSERR_XATTR2BIG: 4284 error = ENOATTR; 4285 break; 4286 default: 4287 error = nfscl_maperr(td, error, 0, 0); 4288 break; 4289 } 4290 return (error); 4291 } 4292 4293 /* 4294 * nfs listextattr call 4295 */ 4296 static int 4297 nfs_listextattr(struct vop_listextattr_args *ap) 4298 { 4299 struct vnode *vp = ap->a_vp; 4300 struct nfsmount *nmp; 4301 struct ucred *cred; 4302 struct thread *td = ap->a_td; 4303 struct nfsvattr nfsva; 4304 size_t len, len2; 4305 uint64_t cookie; 4306 int attrflag, error, ret; 4307 bool eof; 4308 4309 nmp = VFSTONFS(vp->v_mount); 4310 mtx_lock(&nmp->nm_mtx); 4311 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4312 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4313 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4314 mtx_unlock(&nmp->nm_mtx); 4315 return (EOPNOTSUPP); 4316 } 4317 mtx_unlock(&nmp->nm_mtx); 4318 4319 cred = ap->a_cred; 4320 if (cred == NULL) 4321 cred = td->td_ucred; 4322 4323 /* Loop around doing List Extended Attribute RPCs. */ 4324 eof = false; 4325 cookie = 0; 4326 len2 = 0; 4327 error = 0; 4328 while (!eof && error == 0) { 4329 len = nmp->nm_rsize; 4330 attrflag = 0; 4331 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof, 4332 &nfsva, &attrflag, cred, td); 4333 if (attrflag != 0) { 4334 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4335 if (error == 0 && ret != 0) 4336 error = ret; 4337 } 4338 if (error == 0) { 4339 len2 += len; 4340 if (len2 > SSIZE_MAX) 4341 error = ENOATTR; 4342 } 4343 } 4344 if (error == 0 && ap->a_size != NULL) 4345 *ap->a_size = len2; 4346 4347 switch (error) { 4348 case NFSERR_NOTSUPP: 4349 case NFSERR_OPILLEGAL: 4350 mtx_lock(&nmp->nm_mtx); 4351 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4352 mtx_unlock(&nmp->nm_mtx); 4353 error = EOPNOTSUPP; 4354 break; 4355 case NFSERR_NOXATTR: 4356 case NFSERR_XATTR2BIG: 4357 error = ENOATTR; 4358 break; 4359 default: 4360 error = nfscl_maperr(td, error, 0, 0); 4361 break; 4362 } 4363 return (error); 4364 } 4365 4366 /* 4367 * nfs setextattr call 4368 */ 4369 static int 4370 nfs_deleteextattr(struct vop_deleteextattr_args *ap) 4371 { 4372 struct vnode *vp = ap->a_vp; 4373 struct nfsmount *nmp; 4374 struct nfsvattr nfsva; 4375 int attrflag, error, ret; 4376 4377 nmp = VFSTONFS(vp->v_mount); 4378 mtx_lock(&nmp->nm_mtx); 4379 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION || 4380 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 || 4381 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) { 4382 mtx_unlock(&nmp->nm_mtx); 4383 return (EOPNOTSUPP); 4384 } 4385 mtx_unlock(&nmp->nm_mtx); 4386 4387 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */ 4388 attrflag = 0; 4389 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred, 4390 ap->a_td); 4391 if (attrflag != 0) { 4392 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4393 if (error == 0 && ret != 0) 4394 error = ret; 4395 } 4396 4397 switch (error) { 4398 case NFSERR_NOTSUPP: 4399 case NFSERR_OPILLEGAL: 4400 mtx_lock(&nmp->nm_mtx); 4401 nmp->nm_privflag |= NFSMNTP_NOXATTR; 4402 mtx_unlock(&nmp->nm_mtx); 4403 error = EOPNOTSUPP; 4404 break; 4405 case NFSERR_NOXATTR: 4406 case NFSERR_XATTR2BIG: 4407 error = ENOATTR; 4408 break; 4409 default: 4410 error = nfscl_maperr(ap->a_td, error, 0, 0); 4411 break; 4412 } 4413 return (error); 4414 } 4415 4416 /* 4417 * Return POSIX pathconf information applicable to nfs filesystems. 4418 */ 4419 static int 4420 nfs_pathconf(struct vop_pathconf_args *ap) 4421 { 4422 struct nfsv3_pathconf pc; 4423 struct nfsvattr nfsva; 4424 struct vnode *vp = ap->a_vp; 4425 struct nfsmount *nmp; 4426 struct thread *td = curthread; 4427 off_t off; 4428 bool eof; 4429 int attrflag, error; 4430 4431 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX || 4432 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED || 4433 ap->a_name == _PC_NO_TRUNC)) || 4434 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) { 4435 /* 4436 * Since only the above 4 a_names are returned by the NFSv3 4437 * Pathconf RPC, there is no point in doing it for others. 4438 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can 4439 * be used for _PC_NFS4_ACL as well. 4440 */ 4441 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva, 4442 &attrflag); 4443 if (attrflag != 0) 4444 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1); 4445 if (error != 0) 4446 return (error); 4447 } else { 4448 /* 4449 * For NFSv2 (or NFSv3 when not one of the above 4 a_names), 4450 * just fake them. 4451 */ 4452 pc.pc_linkmax = NFS_LINK_MAX; 4453 pc.pc_namemax = NFS_MAXNAMLEN; 4454 pc.pc_notrunc = 1; 4455 pc.pc_chownrestricted = 1; 4456 pc.pc_caseinsensitive = 0; 4457 pc.pc_casepreserving = 1; 4458 error = 0; 4459 } 4460 switch (ap->a_name) { 4461 case _PC_LINK_MAX: 4462 #ifdef _LP64 4463 *ap->a_retval = pc.pc_linkmax; 4464 #else 4465 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax); 4466 #endif 4467 break; 4468 case _PC_NAME_MAX: 4469 *ap->a_retval = pc.pc_namemax; 4470 break; 4471 case _PC_PIPE_BUF: 4472 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) 4473 *ap->a_retval = PIPE_BUF; 4474 else 4475 error = EINVAL; 4476 break; 4477 case _PC_CHOWN_RESTRICTED: 4478 *ap->a_retval = pc.pc_chownrestricted; 4479 break; 4480 case _PC_NO_TRUNC: 4481 *ap->a_retval = pc.pc_notrunc; 4482 break; 4483 case _PC_ACL_NFS4: 4484 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 && 4485 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) 4486 *ap->a_retval = 1; 4487 else 4488 *ap->a_retval = 0; 4489 break; 4490 case _PC_ACL_PATH_MAX: 4491 if (NFS_ISV4(vp)) 4492 *ap->a_retval = ACL_MAX_ENTRIES; 4493 else 4494 *ap->a_retval = 3; 4495 break; 4496 case _PC_PRIO_IO: 4497 *ap->a_retval = 0; 4498 break; 4499 case _PC_SYNC_IO: 4500 *ap->a_retval = 0; 4501 break; 4502 case _PC_ALLOC_SIZE_MIN: 4503 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize; 4504 break; 4505 case _PC_FILESIZEBITS: 4506 if (NFS_ISV34(vp)) 4507 *ap->a_retval = 64; 4508 else 4509 *ap->a_retval = 32; 4510 break; 4511 case _PC_REC_INCR_XFER_SIZE: 4512 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4513 break; 4514 case _PC_REC_MAX_XFER_SIZE: 4515 *ap->a_retval = -1; /* means ``unlimited'' */ 4516 break; 4517 case _PC_REC_MIN_XFER_SIZE: 4518 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4519 break; 4520 case _PC_REC_XFER_ALIGN: 4521 *ap->a_retval = PAGE_SIZE; 4522 break; 4523 case _PC_SYMLINK_MAX: 4524 *ap->a_retval = NFS_MAXPATHLEN; 4525 break; 4526 case _PC_MIN_HOLE_SIZE: 4527 /* Only some NFSv4.2 servers support Seek for Holes. */ 4528 *ap->a_retval = 0; 4529 nmp = VFSTONFS(vp->v_mount); 4530 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) { 4531 /* 4532 * NFSv4.2 doesn't have an attribute for hole size, 4533 * so all we can do is see if the Seek operation is 4534 * supported and then use f_iosize as a "best guess". 4535 */ 4536 mtx_lock(&nmp->nm_mtx); 4537 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) { 4538 mtx_unlock(&nmp->nm_mtx); 4539 off = 0; 4540 attrflag = 0; 4541 error = nfsrpc_seek(vp, &off, &eof, 4542 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva, 4543 &attrflag); 4544 if (attrflag != 0) 4545 (void) nfscl_loadattrcache(&vp, &nfsva, 4546 NULL, 0, 1); 4547 mtx_lock(&nmp->nm_mtx); 4548 if (error == NFSERR_NOTSUPP) 4549 nmp->nm_privflag |= NFSMNTP_SEEKTESTED; 4550 else 4551 nmp->nm_privflag |= NFSMNTP_SEEKTESTED | 4552 NFSMNTP_SEEK; 4553 error = 0; 4554 } 4555 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0) 4556 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize; 4557 mtx_unlock(&nmp->nm_mtx); 4558 } 4559 break; 4560 4561 default: 4562 error = vop_stdpathconf(ap); 4563 break; 4564 } 4565 return (error); 4566 } 4567