1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 37 * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $ 38 */ 39 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include "opt_inet.h" 46 47 #include <sys/param.h> 48 #include <sys/kernel.h> 49 #include <sys/systm.h> 50 #include <sys/resourcevar.h> 51 #include <sys/proc.h> 52 #include <sys/mount.h> 53 #include <sys/buf.h> 54 #include <sys/malloc.h> 55 #include <sys/mbuf.h> 56 #include <sys/namei.h> 57 #include <sys/nlookup.h> 58 #include <sys/socket.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/sysctl.h> 65 #include <sys/conf.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 70 #include <sys/buf2.h> 71 72 #include <vfs/fifofs/fifo.h> 73 #include <vfs/ufs/dir.h> 74 75 #undef DIRBLKSIZ 76 77 #include "rpcv2.h" 78 #include "nfsproto.h" 79 #include "nfs.h" 80 #include "nfsmount.h" 81 #include "nfsnode.h" 82 #include "xdr_subs.h" 83 #include "nfsm_subs.h" 84 85 #include <net/if.h> 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 89 #include <sys/thread2.h> 90 91 /* Defs */ 92 #define TRUE 1 93 #define FALSE 0 94 95 static int nfsfifo_read (struct vop_read_args *); 96 static int nfsfifo_write (struct vop_write_args *); 97 static int nfsfifo_close (struct vop_close_args *); 98 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *); 99 static int nfs_lookup (struct vop_old_lookup_args *); 100 static int nfs_create (struct vop_old_create_args *); 101 static int nfs_mknod (struct vop_old_mknod_args *); 102 static int nfs_open (struct vop_open_args *); 103 static int nfs_close (struct vop_close_args *); 104 static int nfs_access (struct vop_access_args *); 105 static int nfs_getattr (struct vop_getattr_args *); 106 static int nfs_setattr (struct vop_setattr_args *); 107 static int nfs_read (struct vop_read_args *); 108 static int nfs_mmap (struct vop_mmap_args *); 109 static int nfs_fsync (struct vop_fsync_args *); 110 static int nfs_remove (struct vop_old_remove_args *); 111 static int nfs_link (struct vop_old_link_args *); 112 static int nfs_rename (struct vop_old_rename_args *); 113 static int nfs_mkdir (struct vop_old_mkdir_args *); 114 static int nfs_rmdir (struct vop_old_rmdir_args *); 115 static int nfs_symlink (struct vop_old_symlink_args *); 116 static int nfs_readdir (struct vop_readdir_args *); 117 static int nfs_bmap (struct vop_bmap_args *); 118 static int nfs_strategy (struct vop_strategy_args *); 119 static int nfs_lookitup (struct vnode *, const char *, int, 120 struct ucred *, struct thread *, struct nfsnode **); 121 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *); 122 static int nfs_laccess (struct vop_access_args *); 123 static int nfs_readlink (struct vop_readlink_args *); 124 static int nfs_print (struct vop_print_args *); 125 static int nfs_advlock (struct vop_advlock_args *); 126 127 static int nfs_nresolve (struct vop_nresolve_args *); 128 /* 129 * Global vfs data structures for nfs 130 */ 131 struct vop_ops nfsv2_vnode_vops = { 132 .vop_default = vop_defaultop, 133 .vop_access = nfs_access, 134 .vop_advlock = nfs_advlock, 135 .vop_bmap = nfs_bmap, 136 .vop_close = nfs_close, 137 .vop_old_create = nfs_create, 138 .vop_fsync = nfs_fsync, 139 .vop_getattr = nfs_getattr, 140 .vop_getpages = vop_stdgetpages, 141 .vop_putpages = vop_stdputpages, 142 .vop_inactive = nfs_inactive, 143 .vop_old_link = nfs_link, 144 .vop_old_lookup = nfs_lookup, 145 .vop_old_mkdir = nfs_mkdir, 146 .vop_old_mknod = nfs_mknod, 147 .vop_mmap = nfs_mmap, 148 .vop_open = nfs_open, 149 .vop_print = nfs_print, 150 .vop_read = nfs_read, 151 .vop_readdir = nfs_readdir, 152 .vop_readlink = nfs_readlink, 153 .vop_reclaim = nfs_reclaim, 154 .vop_old_remove = nfs_remove, 155 .vop_old_rename = nfs_rename, 156 .vop_old_rmdir = nfs_rmdir, 157 .vop_setattr = nfs_setattr, 158 .vop_strategy = nfs_strategy, 159 .vop_old_symlink = nfs_symlink, 160 .vop_write = nfs_write, 161 .vop_nresolve = nfs_nresolve 162 }; 163 164 /* 165 * Special device vnode ops 166 */ 167 struct vop_ops nfsv2_spec_vops = { 168 .vop_default = vop_defaultop, 169 .vop_access = nfs_laccess, 170 .vop_close = nfs_close, 171 .vop_fsync = nfs_fsync, 172 .vop_getattr = nfs_getattr, 173 .vop_inactive = nfs_inactive, 174 .vop_print = nfs_print, 175 .vop_read = vop_stdnoread, 176 .vop_reclaim = nfs_reclaim, 177 .vop_setattr = nfs_setattr, 178 .vop_write = vop_stdnowrite 179 }; 180 181 struct vop_ops nfsv2_fifo_vops = { 182 .vop_default = fifo_vnoperate, 183 .vop_access = nfs_laccess, 184 .vop_close = nfsfifo_close, 185 .vop_fsync = nfs_fsync, 186 .vop_getattr = nfs_getattr, 187 .vop_inactive = nfs_inactive, 188 .vop_print = nfs_print, 189 .vop_read = nfsfifo_read, 190 .vop_reclaim = nfs_reclaim, 191 .vop_setattr = nfs_setattr, 192 .vop_write = nfsfifo_write 193 }; 194 195 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp, 196 struct componentname *cnp, 197 struct vattr *vap); 198 static int nfs_removerpc (struct vnode *dvp, const char *name, 199 int namelen, 200 struct ucred *cred, struct thread *td); 201 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr, 202 int fnamelen, struct vnode *tdvp, 203 const char *tnameptr, int tnamelen, 204 struct ucred *cred, struct thread *td); 205 static int nfs_renameit (struct vnode *sdvp, 206 struct componentname *scnp, 207 struct sillyrename *sp); 208 209 SYSCTL_DECL(_vfs_nfs); 210 211 static int nfs_flush_on_rename = 1; 212 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW, 213 &nfs_flush_on_rename, 0, "flush fvp prior to rename"); 214 static int nfs_flush_on_hlink = 0; 215 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW, 216 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link"); 217 218 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO; 219 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 220 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 221 222 static int nfsneg_cache_timeout = NFS_MINATTRTIMO; 223 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW, 224 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout"); 225 226 static int nfspos_cache_timeout = NFS_MINATTRTIMO; 227 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW, 228 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout"); 229 230 static int nfsv3_commit_on_close = 0; 231 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, 232 &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); 233 #if 0 234 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, 235 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); 236 237 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, 238 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); 239 #endif 240 241 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ 242 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ 243 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP) 244 245 /* 246 * Returns whether a name component is a degenerate '.' or '..'. 247 */ 248 static __inline 249 int 250 nlcdegenerate(struct nlcomponent *nlc) 251 { 252 if (nlc->nlc_namelen == 1 && nlc->nlc_nameptr[0] == '.') 253 return(1); 254 if (nlc->nlc_namelen == 2 && 255 nlc->nlc_nameptr[0] == '.' && nlc->nlc_nameptr[1] == '.') 256 return(1); 257 return(0); 258 } 259 260 static int 261 nfs3_access_otw(struct vnode *vp, int wmode, 262 struct thread *td, struct ucred *cred) 263 { 264 struct nfsnode *np = VTONFS(vp); 265 int attrflag; 266 int error = 0; 267 u_int32_t *tl; 268 u_int32_t rmode; 269 struct nfsm_info info; 270 271 info.mrep = NULL; 272 info.v3 = 1; 273 274 nfsstats.rpccnt[NFSPROC_ACCESS]++; 275 nfsm_reqhead(&info, vp, NFSPROC_ACCESS, 276 NFSX_FH(info.v3) + NFSX_UNSIGNED); 277 ERROROUT(nfsm_fhtom(&info, vp)); 278 tl = nfsm_build(&info, NFSX_UNSIGNED); 279 *tl = txdr_unsigned(wmode); 280 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error)); 281 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK)); 282 if (error == 0) { 283 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 284 rmode = fxdr_unsigned(u_int32_t, *tl); 285 np->n_mode = rmode; 286 np->n_modeuid = cred->cr_uid; 287 np->n_modestamp = mycpu->gd_time_seconds; 288 } 289 m_freem(info.mrep); 290 info.mrep = NULL; 291 nfsmout: 292 return error; 293 } 294 295 /* 296 * nfs access vnode op. 297 * For nfs version 2, just return ok. File accesses may fail later. 298 * For nfs version 3, use the access rpc to check accessibility. If file modes 299 * are changed on the server, accesses might still fail later. 300 * 301 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 302 */ 303 static int 304 nfs_access(struct vop_access_args *ap) 305 { 306 struct ucred *cred; 307 struct vnode *vp = ap->a_vp; 308 thread_t td = curthread; 309 int error = 0; 310 u_int32_t mode, wmode; 311 struct nfsnode *np = VTONFS(vp); 312 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 313 int v3 = NFS_ISV3(vp); 314 315 lwkt_gettoken(&nmp->nm_token); 316 317 /* 318 * Disallow write attempts on filesystems mounted read-only; 319 * unless the file is a socket, fifo, or a block or character 320 * device resident on the filesystem. 321 */ 322 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 323 switch (vp->v_type) { 324 case VREG: 325 case VDIR: 326 case VLNK: 327 lwkt_reltoken(&nmp->nm_token); 328 return (EROFS); 329 default: 330 break; 331 } 332 } 333 334 /* 335 * The NFS protocol passes only the effective uid/gid over the wire but 336 * we need to check access against real ids if AT_EACCESS not set. 337 * Handle this case by cloning the credentials and setting the 338 * effective ids to the real ones. 339 */ 340 if (ap->a_flags & AT_EACCESS) { 341 cred = crhold(ap->a_cred); 342 } else { 343 cred = crdup(ap->a_cred); 344 cred->cr_uid = cred->cr_ruid; 345 cred->cr_gid = cred->cr_rgid; 346 } 347 348 /* 349 * For nfs v3, check to see if we have done this recently, and if 350 * so return our cached result instead of making an ACCESS call. 351 * If not, do an access rpc, otherwise you are stuck emulating 352 * ufs_access() locally using the vattr. This may not be correct, 353 * since the server may apply other access criteria such as 354 * client uid-->server uid mapping that we do not know about. 355 */ 356 if (v3) { 357 if (ap->a_mode & VREAD) 358 mode = NFSV3ACCESS_READ; 359 else 360 mode = 0; 361 if (vp->v_type != VDIR) { 362 if (ap->a_mode & VWRITE) 363 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 364 if (ap->a_mode & VEXEC) 365 mode |= NFSV3ACCESS_EXECUTE; 366 } else { 367 if (ap->a_mode & VWRITE) 368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 369 NFSV3ACCESS_DELETE); 370 if (ap->a_mode & VEXEC) 371 mode |= NFSV3ACCESS_LOOKUP; 372 } 373 /* XXX safety belt, only make blanket request if caching */ 374 if (nfsaccess_cache_timeout > 0) { 375 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | 376 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | 377 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; 378 } else { 379 wmode = mode; 380 } 381 382 /* 383 * Does our cached result allow us to give a definite yes to 384 * this request? 385 */ 386 if (np->n_modestamp && 387 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) && 388 (cred->cr_uid == np->n_modeuid) && 389 ((np->n_mode & mode) == mode)) { 390 nfsstats.accesscache_hits++; 391 } else { 392 /* 393 * Either a no, or a don't know. Go to the wire. 394 */ 395 nfsstats.accesscache_misses++; 396 error = nfs3_access_otw(vp, wmode, td, cred); 397 if (!error) { 398 if ((np->n_mode & mode) != mode) { 399 error = EACCES; 400 } 401 } 402 } 403 } else { 404 if ((error = nfs_laccess(ap)) != 0) { 405 crfree(cred); 406 lwkt_reltoken(&nmp->nm_token); 407 return (error); 408 } 409 410 /* 411 * Attempt to prevent a mapped root from accessing a file 412 * which it shouldn't. We try to read a byte from the file 413 * if the user is root and the file is not zero length. 414 * After calling nfs_laccess, we should have the correct 415 * file size cached. 416 */ 417 if (cred->cr_uid == 0 && (ap->a_mode & VREAD) 418 && VTONFS(vp)->n_size > 0) { 419 struct iovec aiov; 420 struct uio auio; 421 char buf[1]; 422 423 aiov.iov_base = buf; 424 aiov.iov_len = 1; 425 auio.uio_iov = &aiov; 426 auio.uio_iovcnt = 1; 427 auio.uio_offset = 0; 428 auio.uio_resid = 1; 429 auio.uio_segflg = UIO_SYSSPACE; 430 auio.uio_rw = UIO_READ; 431 auio.uio_td = td; 432 433 if (vp->v_type == VREG) { 434 error = nfs_readrpc_uio(vp, &auio); 435 } else if (vp->v_type == VDIR) { 436 char* bp; 437 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 438 aiov.iov_base = bp; 439 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 440 error = nfs_readdirrpc_uio(vp, &auio); 441 kfree(bp, M_TEMP); 442 } else if (vp->v_type == VLNK) { 443 error = nfs_readlinkrpc_uio(vp, &auio); 444 } else { 445 error = EACCES; 446 } 447 } 448 } 449 /* 450 * [re]record creds for reading and/or writing if access 451 * was granted. Assume the NFS server will grant read access 452 * for execute requests. 453 */ 454 if (error == 0) { 455 if ((ap->a_mode & (VREAD|VEXEC)) && cred != np->n_rucred) { 456 crhold(cred); 457 if (np->n_rucred) 458 crfree(np->n_rucred); 459 np->n_rucred = cred; 460 } 461 if ((ap->a_mode & VWRITE) && cred != np->n_wucred) { 462 crhold(cred); 463 if (np->n_wucred) 464 crfree(np->n_wucred); 465 np->n_wucred = cred; 466 } 467 } 468 lwkt_reltoken(&nmp->nm_token); 469 crfree(cred); 470 return(error); 471 } 472 473 /* 474 * nfs open vnode op 475 * Check to see if the type is ok 476 * and that deletion is not in progress. 477 * For paged in text files, you will need to flush the page cache 478 * if consistency is lost. 479 * 480 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 481 * struct file *a_fp) 482 */ 483 /* ARGSUSED */ 484 static int 485 nfs_open(struct vop_open_args *ap) 486 { 487 struct vnode *vp = ap->a_vp; 488 struct nfsnode *np = VTONFS(vp); 489 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 490 struct vattr vattr; 491 int error; 492 493 lwkt_gettoken(&nmp->nm_token); 494 495 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 496 #ifdef DIAGNOSTIC 497 kprintf("open eacces vtyp=%d\n",vp->v_type); 498 #endif 499 lwkt_reltoken(&nmp->nm_token); 500 return (EOPNOTSUPP); 501 } 502 503 /* 504 * Save valid creds for reading and writing for later RPCs. 505 */ 506 if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) { 507 crhold(ap->a_cred); 508 if (np->n_rucred) 509 crfree(np->n_rucred); 510 np->n_rucred = ap->a_cred; 511 } 512 if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) { 513 crhold(ap->a_cred); 514 if (np->n_wucred) 515 crfree(np->n_wucred); 516 np->n_wucred = ap->a_cred; 517 } 518 519 /* 520 * Clear the attribute cache only if opening with write access. It 521 * is unclear if we should do this at all here, but we certainly 522 * should not clear the cache unconditionally simply because a file 523 * is being opened. 524 */ 525 if (ap->a_mode & FWRITE) 526 np->n_attrstamp = 0; 527 528 /* 529 * For normal NFS, reconcile changes made locally verses 530 * changes made remotely. Note that VOP_GETATTR only goes 531 * to the wire if the cached attribute has timed out or been 532 * cleared. 533 * 534 * If local modifications have been made clear the attribute 535 * cache to force an attribute and modified time check. If 536 * GETATTR detects that the file has been changed by someone 537 * other then us it will set NRMODIFIED. 538 * 539 * If we are opening a directory and local changes have been 540 * made we have to invalidate the cache in order to ensure 541 * that we get the most up-to-date information from the 542 * server. XXX 543 */ 544 if (np->n_flag & NLMODIFIED) { 545 np->n_attrstamp = 0; 546 if (vp->v_type == VDIR) { 547 error = nfs_vinvalbuf(vp, V_SAVE, 1); 548 if (error == EINTR) 549 return (error); 550 nfs_invaldir(vp); 551 } 552 } 553 error = VOP_GETATTR(vp, &vattr); 554 if (error) { 555 lwkt_reltoken(&nmp->nm_token); 556 return (error); 557 } 558 if (np->n_flag & NRMODIFIED) { 559 if (vp->v_type == VDIR) 560 nfs_invaldir(vp); 561 error = nfs_vinvalbuf(vp, V_SAVE, 1); 562 if (error == EINTR) { 563 lwkt_reltoken(&nmp->nm_token); 564 return (error); 565 } 566 np->n_flag &= ~NRMODIFIED; 567 } 568 error = vop_stdopen(ap); 569 lwkt_reltoken(&nmp->nm_token); 570 571 return error; 572 } 573 574 /* 575 * nfs close vnode op 576 * What an NFS client should do upon close after writing is a debatable issue. 577 * Most NFS clients push delayed writes to the server upon close, basically for 578 * two reasons: 579 * 1 - So that any write errors may be reported back to the client process 580 * doing the close system call. By far the two most likely errors are 581 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 582 * 2 - To put a worst case upper bound on cache inconsistency between 583 * multiple clients for the file. 584 * There is also a consistency problem for Version 2 of the protocol w.r.t. 585 * not being able to tell if other clients are writing a file concurrently, 586 * since there is no way of knowing if the changed modify time in the reply 587 * is only due to the write for this client. 588 * (NFS Version 3 provides weak cache consistency data in the reply that 589 * should be sufficient to detect and handle this case.) 590 * 591 * The current code does the following: 592 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 593 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 594 * or commit them (this satisfies 1 and 2 except for the 595 * case where the server crashes after this close but 596 * before the commit RPC, which is felt to be "good 597 * enough". Changing the last argument to nfs_flush() to 598 * a 1 would force a commit operation, if it is felt a 599 * commit is necessary now. 600 * for NQNFS - do nothing now, since 2 is dealt with via leases and 601 * 1 should be dealt with via an fsync() system call for 602 * cases where write errors are important. 603 * 604 * nfs_close(struct vnode *a_vp, int a_fflag) 605 */ 606 /* ARGSUSED */ 607 static int 608 nfs_close(struct vop_close_args *ap) 609 { 610 struct vnode *vp = ap->a_vp; 611 struct nfsnode *np = VTONFS(vp); 612 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 613 int error = 0; 614 thread_t td = curthread; 615 616 lwkt_gettoken(&nmp->nm_token); 617 618 if (vp->v_type == VREG) { 619 if (np->n_flag & NLMODIFIED) { 620 if (NFS_ISV3(vp)) { 621 /* 622 * Under NFSv3 we have dirty buffers to dispose of. We 623 * must flush them to the NFS server. We have the option 624 * of waiting all the way through the commit rpc or just 625 * waiting for the initial write. The default is to only 626 * wait through the initial write so the data is in the 627 * server's cache, which is roughly similar to the state 628 * a standard disk subsystem leaves the file in on close(). 629 * 630 * We cannot clear the NLMODIFIED bit in np->n_flag due to 631 * potential races with other processes, and certainly 632 * cannot clear it if we don't commit. 633 */ 634 int cm = nfsv3_commit_on_close ? 1 : 0; 635 error = nfs_flush(vp, MNT_WAIT, td, cm); 636 /* np->n_flag &= ~NLMODIFIED; */ 637 } else { 638 error = nfs_vinvalbuf(vp, V_SAVE, 1); 639 } 640 np->n_attrstamp = 0; 641 } 642 if (np->n_flag & NWRITEERR) { 643 np->n_flag &= ~NWRITEERR; 644 error = np->n_error; 645 } 646 } 647 vop_stdclose(ap); 648 lwkt_reltoken(&nmp->nm_token); 649 650 return (error); 651 } 652 653 /* 654 * nfs getattr call from vfs. 655 * 656 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 657 */ 658 static int 659 nfs_getattr(struct vop_getattr_args *ap) 660 { 661 struct vnode *vp = ap->a_vp; 662 struct nfsnode *np = VTONFS(vp); 663 struct nfsmount *nmp; 664 int error = 0; 665 thread_t td = curthread; 666 struct nfsm_info info; 667 668 info.mrep = NULL; 669 info.v3 = NFS_ISV3(vp); 670 nmp = VFSTONFS(vp->v_mount); 671 672 lwkt_gettoken(&nmp->nm_token); 673 674 /* 675 * Update local times for special files. 676 */ 677 if (np->n_flag & (NACC | NUPD)) 678 np->n_flag |= NCHG; 679 /* 680 * First look in the cache. 681 */ 682 if (nfs_getattrcache(vp, ap->a_vap) == 0) 683 goto done; 684 685 if (info.v3 && nfsaccess_cache_timeout > 0) { 686 nfsstats.accesscache_misses++; 687 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK)); 688 if (nfs_getattrcache(vp, ap->a_vap) == 0) 689 goto done; 690 } 691 692 nfsstats.rpccnt[NFSPROC_GETATTR]++; 693 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3)); 694 ERROROUT(nfsm_fhtom(&info, vp)); 695 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td, 696 nfs_vpcred(vp, ND_CHECK), &error)); 697 if (error == 0) { 698 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap)); 699 } 700 m_freem(info.mrep); 701 info.mrep = NULL; 702 done: 703 /* 704 * NFS doesn't support chflags flags. If the nfs mount was 705 * made -o cache set the UF_CACHE bit for swapcache. 706 */ 707 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT)) 708 ap->a_vap->va_flags |= UF_CACHE; 709 nfsmout: 710 lwkt_reltoken(&nmp->nm_token); 711 return (error); 712 } 713 714 /* 715 * nfs setattr call. 716 * 717 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred) 718 */ 719 static int 720 nfs_setattr(struct vop_setattr_args *ap) 721 { 722 struct vnode *vp = ap->a_vp; 723 struct nfsnode *np = VTONFS(vp); 724 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 725 struct vattr *vap = ap->a_vap; 726 int biosize = vp->v_mount->mnt_stat.f_iosize; 727 int error = 0; 728 int boff; 729 off_t tsize; 730 thread_t td = curthread; 731 732 #ifndef nolint 733 tsize = (off_t)0; 734 #endif 735 /* 736 * Setting of flags is not supported. 737 */ 738 if (vap->va_flags != VNOVAL) 739 return (EOPNOTSUPP); 740 741 /* 742 * Disallow write attempts if the filesystem is mounted read-only. 743 */ 744 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 745 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 746 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 747 (vp->v_mount->mnt_flag & MNT_RDONLY)) 748 return (EROFS); 749 750 lwkt_gettoken(&nmp->nm_token); 751 752 if (vap->va_size != VNOVAL) { 753 /* 754 * truncation requested 755 */ 756 switch (vp->v_type) { 757 case VDIR: 758 lwkt_reltoken(&nmp->nm_token); 759 return (EISDIR); 760 case VCHR: 761 case VBLK: 762 case VSOCK: 763 case VFIFO: 764 if (vap->va_mtime.tv_sec == VNOVAL && 765 vap->va_atime.tv_sec == VNOVAL && 766 vap->va_mode == (mode_t)VNOVAL && 767 vap->va_uid == (uid_t)VNOVAL && 768 vap->va_gid == (gid_t)VNOVAL) { 769 lwkt_reltoken(&nmp->nm_token); 770 return (0); 771 } 772 vap->va_size = VNOVAL; 773 break; 774 default: 775 /* 776 * Disallow write attempts if the filesystem is 777 * mounted read-only. 778 */ 779 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 780 lwkt_reltoken(&nmp->nm_token); 781 return (EROFS); 782 } 783 784 tsize = np->n_size; 785 again: 786 boff = (int)vap->va_size & (biosize - 1); 787 error = nfs_meta_setsize(vp, td, vap->va_size, 0); 788 789 #if 0 790 if (np->n_flag & NLMODIFIED) { 791 if (vap->va_size == 0) 792 error = nfs_vinvalbuf(vp, 0, 1); 793 else 794 error = nfs_vinvalbuf(vp, V_SAVE, 1); 795 } 796 #endif 797 /* 798 * note: this loop case almost always happens at 799 * least once per truncation. 800 */ 801 if (error == 0 && np->n_size != vap->va_size) 802 goto again; 803 np->n_vattr.va_size = vap->va_size; 804 break; 805 } 806 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) { 807 /* 808 * What to do. If we are modifying the mtime we lose 809 * mtime detection of changes made by the server or other 810 * clients. But programs like rsync/rdist/cpdup are going 811 * to call utimes a lot. We don't want to piecemeal sync. 812 * 813 * For now sync if any prior remote changes were detected, 814 * but allow us to lose track of remote changes made during 815 * the utimes operation. 816 */ 817 if (np->n_flag & NRMODIFIED) 818 error = nfs_vinvalbuf(vp, V_SAVE, 1); 819 if (error == EINTR) 820 return (error); 821 if (error == 0) { 822 if (vap->va_mtime.tv_sec != VNOVAL) { 823 np->n_mtime = vap->va_mtime.tv_sec; 824 } 825 } 826 } 827 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 828 829 /* 830 * Sanity check if a truncation was issued. This should only occur 831 * if multiple processes are racing on the same file. 832 */ 833 if (error == 0 && vap->va_size != VNOVAL && 834 np->n_size != vap->va_size) { 835 kprintf("NFS ftruncate: server disagrees on the file size: " 836 "%jd/%jd/%jd\n", 837 (intmax_t)tsize, 838 (intmax_t)vap->va_size, 839 (intmax_t)np->n_size); 840 goto again; 841 } 842 if (error && vap->va_size != VNOVAL) { 843 np->n_size = np->n_vattr.va_size = tsize; 844 nfs_meta_setsize(vp, td, np->n_size, 0); 845 } 846 lwkt_reltoken(&nmp->nm_token); 847 848 return (error); 849 } 850 851 /* 852 * Do an nfs setattr rpc. 853 */ 854 static int 855 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, 856 struct ucred *cred, struct thread *td) 857 { 858 struct nfsv2_sattr *sp; 859 struct nfsnode *np = VTONFS(vp); 860 u_int32_t *tl; 861 int error = 0, wccflag = NFSV3_WCCRATTR; 862 struct nfsm_info info; 863 864 info.mrep = NULL; 865 info.v3 = NFS_ISV3(vp); 866 867 nfsstats.rpccnt[NFSPROC_SETATTR]++; 868 nfsm_reqhead(&info, vp, NFSPROC_SETATTR, 869 NFSX_FH(info.v3) + NFSX_SATTR(info.v3)); 870 ERROROUT(nfsm_fhtom(&info, vp)); 871 if (info.v3) { 872 nfsm_v3attrbuild(&info, vap, TRUE); 873 tl = nfsm_build(&info, NFSX_UNSIGNED); 874 *tl = nfs_false; 875 } else { 876 sp = nfsm_build(&info, NFSX_V2SATTR); 877 if (vap->va_mode == (mode_t)VNOVAL) 878 sp->sa_mode = nfs_xdrneg1; 879 else 880 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 881 if (vap->va_uid == (uid_t)VNOVAL) 882 sp->sa_uid = nfs_xdrneg1; 883 else 884 sp->sa_uid = txdr_unsigned(vap->va_uid); 885 if (vap->va_gid == (gid_t)VNOVAL) 886 sp->sa_gid = nfs_xdrneg1; 887 else 888 sp->sa_gid = txdr_unsigned(vap->va_gid); 889 sp->sa_size = txdr_unsigned(vap->va_size); 890 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 891 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 892 } 893 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error)); 894 if (info.v3) { 895 np->n_modestamp = 0; 896 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 897 } else { 898 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 899 } 900 m_freem(info.mrep); 901 info.mrep = NULL; 902 nfsmout: 903 return (error); 904 } 905 906 static 907 void 908 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout) 909 { 910 if (nctimeout == 0) 911 nctimeout = 1; 912 else 913 nctimeout *= hz; 914 cache_setvp(nch, vp); 915 cache_settimeout(nch, nctimeout); 916 } 917 918 /* 919 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove 920 * nfs_lookup() until all remaining new api calls are implemented. 921 * 922 * Resolve a namecache entry. This function is passed a locked ncp and 923 * must call nfs_cache_setvp() on it as appropriate to resolve the entry. 924 */ 925 static int 926 nfs_nresolve(struct vop_nresolve_args *ap) 927 { 928 struct thread *td = curthread; 929 struct namecache *ncp; 930 struct nfsmount *nmp; 931 struct ucred *cred; 932 struct nfsnode *np; 933 struct vnode *dvp; 934 struct vnode *nvp; 935 nfsfh_t *fhp; 936 int attrflag; 937 int fhsize; 938 int error; 939 int tmp_error; 940 int len; 941 struct nfsm_info info; 942 943 cred = ap->a_cred; 944 dvp = ap->a_dvp; 945 nmp = VFSTONFS(dvp->v_mount); 946 947 lwkt_gettoken(&nmp->nm_token); 948 949 if ((error = vget(dvp, LK_SHARED)) != 0) { 950 lwkt_reltoken(&nmp->nm_token); 951 return (error); 952 } 953 954 info.mrep = NULL; 955 info.v3 = NFS_ISV3(dvp); 956 957 nvp = NULL; 958 nfsstats.lookupcache_misses++; 959 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 960 ncp = ap->a_nch->ncp; 961 len = ncp->nc_nlen; 962 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 963 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 964 ERROROUT(nfsm_fhtom(&info, dvp)); 965 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN)); 966 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, 967 ap->a_cred, &error)); 968 if (error) { 969 /* 970 * Cache negatve lookups to reduce NFS traffic, but use 971 * a fast timeout. Otherwise use a timeout of 1 tick. 972 * XXX we should add a namecache flag for no-caching 973 * to uncache the negative hit as soon as possible, but 974 * we cannot simply destroy the entry because it is used 975 * as a placeholder by the caller. 976 * 977 * The refactored nfs code will overwrite a non-zero error 978 * with 0 when we use ERROROUT(), so don't here. 979 */ 980 if (error == ENOENT) 981 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout); 982 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 983 NFS_LATTR_NOSHRINK); 984 if (tmp_error) { 985 error = tmp_error; 986 goto nfsmout; 987 } 988 m_freem(info.mrep); 989 info.mrep = NULL; 990 goto nfsmout; 991 } 992 993 /* 994 * Success, get the file handle, do various checks, and load 995 * post-operation data from the reply packet. Theoretically 996 * we should never be looking up "." so, theoretically, we 997 * should never get the same file handle as our directory. But 998 * we check anyway. XXX 999 * 1000 * Note that no timeout is set for the positive cache hit. We 1001 * assume, theoretically, that ESTALE returns will be dealt with 1002 * properly to handle NFS races and in anycase we cannot depend 1003 * on a timeout to deal with NFS open/create/excl issues so instead 1004 * of a bad hack here the rest of the NFS client code needs to do 1005 * the right thing. 1006 */ 1007 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1008 1009 np = VTONFS(dvp); 1010 if (NFS_CMPFH(np, fhp, fhsize)) { 1011 vref(dvp); 1012 nvp = dvp; 1013 } else { 1014 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1015 if (error) { 1016 m_freem(info.mrep); 1017 info.mrep = NULL; 1018 vput(dvp); 1019 lwkt_reltoken(&nmp->nm_token); 1020 return (error); 1021 } 1022 nvp = NFSTOV(np); 1023 } 1024 if (info.v3) { 1025 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag, 1026 NFS_LATTR_NOSHRINK)); 1027 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1028 NFS_LATTR_NOSHRINK)); 1029 } else { 1030 ERROROUT(nfsm_loadattr(&info, nvp, NULL)); 1031 } 1032 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout); 1033 m_freem(info.mrep); 1034 info.mrep = NULL; 1035 nfsmout: 1036 lwkt_reltoken(&nmp->nm_token); 1037 vput(dvp); 1038 if (nvp) { 1039 if (nvp == dvp) 1040 vrele(nvp); 1041 else 1042 vput(nvp); 1043 } 1044 return (error); 1045 } 1046 1047 /* 1048 * 'cached' nfs directory lookup 1049 * 1050 * NOTE: cannot be removed until NFS implements all the new n*() API calls. 1051 * 1052 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 1053 * struct componentname *a_cnp) 1054 */ 1055 static int 1056 nfs_lookup(struct vop_old_lookup_args *ap) 1057 { 1058 struct componentname *cnp = ap->a_cnp; 1059 struct vnode *dvp = ap->a_dvp; 1060 struct vnode **vpp = ap->a_vpp; 1061 int flags = cnp->cn_flags; 1062 struct vnode *newvp; 1063 struct nfsmount *nmp; 1064 long len; 1065 nfsfh_t *fhp; 1066 struct nfsnode *np; 1067 int lockparent, wantparent, attrflag, fhsize; 1068 int error; 1069 int tmp_error; 1070 struct nfsm_info info; 1071 1072 info.mrep = NULL; 1073 info.v3 = NFS_ISV3(dvp); 1074 error = 0; 1075 1076 /* 1077 * Read-only mount check and directory check. 1078 */ 1079 *vpp = NULLVP; 1080 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) && 1081 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) 1082 return (EROFS); 1083 1084 if (dvp->v_type != VDIR) 1085 return (ENOTDIR); 1086 1087 /* 1088 * Look it up in the cache. Note that ENOENT is only returned if we 1089 * previously entered a negative hit (see later on). The additional 1090 * nfsneg_cache_timeout check causes previously cached results to 1091 * be instantly ignored if the negative caching is turned off. 1092 */ 1093 lockparent = flags & CNP_LOCKPARENT; 1094 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); 1095 nmp = VFSTONFS(dvp->v_mount); 1096 np = VTONFS(dvp); 1097 1098 lwkt_gettoken(&nmp->nm_token); 1099 1100 /* 1101 * Go to the wire. 1102 */ 1103 error = 0; 1104 newvp = NULLVP; 1105 nfsstats.lookupcache_misses++; 1106 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1107 len = cnp->cn_namelen; 1108 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 1109 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 1110 ERROROUT(nfsm_fhtom(&info, dvp)); 1111 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 1112 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td, 1113 cnp->cn_cred, &error)); 1114 if (error) { 1115 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 1116 NFS_LATTR_NOSHRINK); 1117 if (tmp_error) { 1118 error = tmp_error; 1119 goto nfsmout; 1120 } 1121 1122 m_freem(info.mrep); 1123 info.mrep = NULL; 1124 goto nfsmout; 1125 } 1126 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1127 1128 /* 1129 * Handle RENAME case... 1130 */ 1131 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) { 1132 if (NFS_CMPFH(np, fhp, fhsize)) { 1133 m_freem(info.mrep); 1134 info.mrep = NULL; 1135 lwkt_reltoken(&nmp->nm_token); 1136 return (EISDIR); 1137 } 1138 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1139 if (error) { 1140 m_freem(info.mrep); 1141 info.mrep = NULL; 1142 lwkt_reltoken(&nmp->nm_token); 1143 return (error); 1144 } 1145 newvp = NFSTOV(np); 1146 if (info.v3) { 1147 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1148 NFS_LATTR_NOSHRINK)); 1149 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1150 NFS_LATTR_NOSHRINK)); 1151 } else { 1152 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1153 } 1154 *vpp = newvp; 1155 m_freem(info.mrep); 1156 info.mrep = NULL; 1157 if (!lockparent) { 1158 vn_unlock(dvp); 1159 cnp->cn_flags |= CNP_PDIRUNLOCK; 1160 } 1161 lwkt_reltoken(&nmp->nm_token); 1162 return (0); 1163 } 1164 1165 if (flags & CNP_ISDOTDOT) { 1166 vn_unlock(dvp); 1167 cnp->cn_flags |= CNP_PDIRUNLOCK; 1168 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1169 if (error) { 1170 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1171 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 1172 lwkt_reltoken(&nmp->nm_token); 1173 return (error); /* NOTE: return error from nget */ 1174 } 1175 newvp = NFSTOV(np); 1176 if (lockparent) { 1177 error = vn_lock(dvp, LK_EXCLUSIVE); 1178 if (error) { 1179 vput(newvp); 1180 lwkt_reltoken(&nmp->nm_token); 1181 return (error); 1182 } 1183 cnp->cn_flags |= CNP_PDIRUNLOCK; 1184 } 1185 } else if (NFS_CMPFH(np, fhp, fhsize)) { 1186 vref(dvp); 1187 newvp = dvp; 1188 } else { 1189 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1190 if (error) { 1191 m_freem(info.mrep); 1192 info.mrep = NULL; 1193 lwkt_reltoken(&nmp->nm_token); 1194 return (error); 1195 } 1196 if (!lockparent) { 1197 vn_unlock(dvp); 1198 cnp->cn_flags |= CNP_PDIRUNLOCK; 1199 } 1200 newvp = NFSTOV(np); 1201 } 1202 if (info.v3) { 1203 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1204 NFS_LATTR_NOSHRINK)); 1205 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1206 NFS_LATTR_NOSHRINK)); 1207 } else { 1208 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1209 } 1210 #if 0 1211 /* XXX MOVE TO nfs_nremove() */ 1212 if ((cnp->cn_flags & CNP_MAKEENTRY) && 1213 cnp->cn_nameiop != NAMEI_DELETE) { 1214 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */ 1215 } 1216 #endif 1217 *vpp = newvp; 1218 m_freem(info.mrep); 1219 info.mrep = NULL; 1220 nfsmout: 1221 if (error) { 1222 if (newvp != NULLVP) { 1223 vrele(newvp); 1224 *vpp = NULLVP; 1225 } 1226 if ((cnp->cn_nameiop == NAMEI_CREATE || 1227 cnp->cn_nameiop == NAMEI_RENAME) && 1228 error == ENOENT) { 1229 if (!lockparent) { 1230 vn_unlock(dvp); 1231 cnp->cn_flags |= CNP_PDIRUNLOCK; 1232 } 1233 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1234 error = EROFS; 1235 else 1236 error = EJUSTRETURN; 1237 } 1238 } 1239 lwkt_reltoken(&nmp->nm_token); 1240 return (error); 1241 } 1242 1243 /* 1244 * nfs read call. 1245 * Just call nfs_bioread() to do the work. 1246 * 1247 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 1248 * struct ucred *a_cred) 1249 */ 1250 static int 1251 nfs_read(struct vop_read_args *ap) 1252 { 1253 struct vnode *vp = ap->a_vp; 1254 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1255 int error; 1256 1257 lwkt_gettoken(&nmp->nm_token); 1258 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag); 1259 lwkt_reltoken(&nmp->nm_token); 1260 1261 return error; 1262 } 1263 1264 /* 1265 * nfs readlink call 1266 * 1267 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 1268 */ 1269 static int 1270 nfs_readlink(struct vop_readlink_args *ap) 1271 { 1272 struct vnode *vp = ap->a_vp; 1273 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1274 int error; 1275 1276 if (vp->v_type != VLNK) 1277 return (EINVAL); 1278 1279 lwkt_gettoken(&nmp->nm_token); 1280 error = nfs_bioread(vp, ap->a_uio, 0); 1281 lwkt_reltoken(&nmp->nm_token); 1282 1283 return error; 1284 } 1285 1286 /* 1287 * Do a readlink rpc. 1288 * Called by nfs_doio() from below the buffer cache. 1289 */ 1290 int 1291 nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop) 1292 { 1293 int error = 0, len, attrflag; 1294 struct nfsm_info info; 1295 1296 info.mrep = NULL; 1297 info.v3 = NFS_ISV3(vp); 1298 1299 nfsstats.rpccnt[NFSPROC_READLINK]++; 1300 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3)); 1301 ERROROUT(nfsm_fhtom(&info, vp)); 1302 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td, 1303 nfs_vpcred(vp, ND_CHECK), &error)); 1304 if (info.v3) { 1305 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1306 NFS_LATTR_NOSHRINK)); 1307 } 1308 if (!error) { 1309 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN)); 1310 if (len == NFS_MAXPATHLEN) { 1311 struct nfsnode *np = VTONFS(vp); 1312 if (np->n_size && np->n_size < NFS_MAXPATHLEN) 1313 len = np->n_size; 1314 } 1315 ERROROUT(nfsm_mtouio(&info, uiop, len)); 1316 } 1317 m_freem(info.mrep); 1318 info.mrep = NULL; 1319 nfsmout: 1320 return (error); 1321 } 1322 1323 /* 1324 * nfs synchronous read rpc using UIO 1325 */ 1326 int 1327 nfs_readrpc_uio(struct vnode *vp, struct uio *uiop) 1328 { 1329 u_int32_t *tl; 1330 struct nfsmount *nmp; 1331 int error = 0, len, retlen, tsiz, eof, attrflag; 1332 struct nfsm_info info; 1333 off_t tmp_off; 1334 1335 info.mrep = NULL; 1336 info.v3 = NFS_ISV3(vp); 1337 1338 #ifndef nolint 1339 eof = 0; 1340 #endif 1341 nmp = VFSTONFS(vp->v_mount); 1342 1343 tsiz = uiop->uio_resid; 1344 tmp_off = uiop->uio_offset + tsiz; 1345 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) 1346 return (EFBIG); 1347 tmp_off = uiop->uio_offset; 1348 while (tsiz > 0) { 1349 nfsstats.rpccnt[NFSPROC_READ]++; 1350 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1351 nfsm_reqhead(&info, vp, NFSPROC_READ, 1352 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3); 1353 ERROROUT(nfsm_fhtom(&info, vp)); 1354 tl = nfsm_build(&info, NFSX_UNSIGNED * 3); 1355 if (info.v3) { 1356 txdr_hyper(uiop->uio_offset, tl); 1357 *(tl + 2) = txdr_unsigned(len); 1358 } else { 1359 *tl++ = txdr_unsigned(uiop->uio_offset); 1360 *tl++ = txdr_unsigned(len); 1361 *tl = 0; 1362 } 1363 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td, 1364 nfs_vpcred(vp, ND_READ), &error)); 1365 if (info.v3) { 1366 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1367 NFS_LATTR_NOSHRINK)); 1368 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 1369 eof = fxdr_unsigned(int, *(tl + 1)); 1370 } else { 1371 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1372 } 1373 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len)); 1374 ERROROUT(nfsm_mtouio(&info, uiop, retlen)); 1375 m_freem(info.mrep); 1376 info.mrep = NULL; 1377 1378 /* 1379 * Handle short-read from server (NFSv3). If EOF is not 1380 * flagged (and no error occurred), but retlen is less 1381 * then the request size, we must zero-fill the remainder. 1382 */ 1383 if (retlen < len && info.v3 && eof == 0) { 1384 ERROROUT(uiomovez(len - retlen, uiop)); 1385 retlen = len; 1386 } 1387 tsiz -= retlen; 1388 1389 /* 1390 * Terminate loop on EOF or zero-length read. 1391 * 1392 * For NFSv2 a short-read indicates EOF, not zero-fill, 1393 * and also terminates the loop. 1394 */ 1395 if (info.v3) { 1396 if (eof || retlen == 0) 1397 tsiz = 0; 1398 } else if (retlen < len) { 1399 tsiz = 0; 1400 } 1401 } 1402 nfsmout: 1403 return (error); 1404 } 1405 1406 /* 1407 * nfs write call 1408 */ 1409 int 1410 nfs_writerpc_uio(struct vnode *vp, struct uio *uiop, 1411 int *iomode, int *must_commit) 1412 { 1413 u_int32_t *tl; 1414 int32_t backup; 1415 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1416 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1417 int committed = NFSV3WRITE_FILESYNC; 1418 struct nfsm_info info; 1419 1420 info.mrep = NULL; 1421 info.v3 = NFS_ISV3(vp); 1422 1423 #ifndef DIAGNOSTIC 1424 if (uiop->uio_iovcnt != 1) 1425 panic("nfs: writerpc iovcnt > 1"); 1426 #endif 1427 *must_commit = 0; 1428 tsiz = uiop->uio_resid; 1429 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1430 return (EFBIG); 1431 while (tsiz > 0) { 1432 nfsstats.rpccnt[NFSPROC_WRITE]++; 1433 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1434 nfsm_reqhead(&info, vp, NFSPROC_WRITE, 1435 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED + 1436 nfsm_rndup(len)); 1437 ERROROUT(nfsm_fhtom(&info, vp)); 1438 if (info.v3) { 1439 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 1440 txdr_hyper(uiop->uio_offset, tl); 1441 tl += 2; 1442 *tl++ = txdr_unsigned(len); 1443 *tl++ = txdr_unsigned(*iomode); 1444 *tl = txdr_unsigned(len); 1445 } else { 1446 u_int32_t x; 1447 1448 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); 1449 /* Set both "begin" and "current" to non-garbage. */ 1450 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1451 *tl++ = x; /* "begin offset" */ 1452 *tl++ = x; /* "current offset" */ 1453 x = txdr_unsigned(len); 1454 *tl++ = x; /* total to this offset */ 1455 *tl = x; /* size of this write */ 1456 } 1457 ERROROUT(nfsm_uiotom(&info, uiop, len)); 1458 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td, 1459 nfs_vpcred(vp, ND_WRITE), &error)); 1460 if (info.v3) { 1461 /* 1462 * The write RPC returns a before and after mtime. The 1463 * nfsm_wcc_data() macro checks the before n_mtime 1464 * against the before time and stores the after time 1465 * in the nfsnode's cached vattr and n_mtime field. 1466 * The NRMODIFIED bit will be set if the before 1467 * time did not match the original mtime. 1468 */ 1469 wccflag = NFSV3_WCCCHK; 1470 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 1471 if (error == 0) { 1472 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF)); 1473 rlen = fxdr_unsigned(int, *tl++); 1474 if (rlen == 0) { 1475 error = NFSERR_IO; 1476 m_freem(info.mrep); 1477 info.mrep = NULL; 1478 break; 1479 } else if (rlen < len) { 1480 backup = len - rlen; 1481 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup; 1482 uiop->uio_iov->iov_len += backup; 1483 uiop->uio_offset -= backup; 1484 uiop->uio_resid += backup; 1485 len = rlen; 1486 } 1487 commit = fxdr_unsigned(int, *tl++); 1488 1489 /* 1490 * Return the lowest committment level 1491 * obtained by any of the RPCs. 1492 */ 1493 if (committed == NFSV3WRITE_FILESYNC) 1494 committed = commit; 1495 else if (committed == NFSV3WRITE_DATASYNC && 1496 commit == NFSV3WRITE_UNSTABLE) 1497 committed = commit; 1498 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ 1499 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1500 NFSX_V3WRITEVERF); 1501 nmp->nm_state |= NFSSTA_HASWRITEVERF; 1502 } else if (bcmp((caddr_t)tl, 1503 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1504 *must_commit = 1; 1505 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1506 NFSX_V3WRITEVERF); 1507 } 1508 } 1509 } else { 1510 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1511 } 1512 m_freem(info.mrep); 1513 info.mrep = NULL; 1514 if (error) 1515 break; 1516 tsiz -= len; 1517 } 1518 nfsmout: 1519 if (vp->v_mount->mnt_flag & MNT_ASYNC) 1520 committed = NFSV3WRITE_FILESYNC; 1521 *iomode = committed; 1522 if (error) 1523 uiop->uio_resid = tsiz; 1524 return (error); 1525 } 1526 1527 /* 1528 * nfs mknod rpc 1529 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1530 * mode set to specify the file type and the size field for rdev. 1531 */ 1532 static int 1533 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1534 struct vattr *vap) 1535 { 1536 struct nfsv2_sattr *sp; 1537 u_int32_t *tl; 1538 struct vnode *newvp = NULL; 1539 struct nfsnode *np = NULL; 1540 struct vattr vattr; 1541 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1542 int rmajor, rminor; 1543 struct nfsm_info info; 1544 1545 info.mrep = NULL; 1546 info.v3 = NFS_ISV3(dvp); 1547 1548 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1549 rmajor = txdr_unsigned(vap->va_rmajor); 1550 rminor = txdr_unsigned(vap->va_rminor); 1551 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) { 1552 rmajor = nfs_xdrneg1; 1553 rminor = nfs_xdrneg1; 1554 } else { 1555 return (EOPNOTSUPP); 1556 } 1557 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1558 return (error); 1559 } 1560 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1561 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD, 1562 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED + 1563 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1564 ERROROUT(nfsm_fhtom(&info, dvp)); 1565 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1566 NFS_MAXNAMLEN)); 1567 if (info.v3) { 1568 tl = nfsm_build(&info, NFSX_UNSIGNED); 1569 *tl++ = vtonfsv3_type(vap->va_type); 1570 nfsm_v3attrbuild(&info, vap, FALSE); 1571 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1572 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 1573 *tl++ = txdr_unsigned(vap->va_rmajor); 1574 *tl = txdr_unsigned(vap->va_rminor); 1575 } 1576 } else { 1577 sp = nfsm_build(&info, NFSX_V2SATTR); 1578 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1579 sp->sa_uid = nfs_xdrneg1; 1580 sp->sa_gid = nfs_xdrneg1; 1581 sp->sa_size = makeudev(rmajor, rminor); 1582 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1583 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1584 } 1585 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td, 1586 cnp->cn_cred, &error)); 1587 if (!error) { 1588 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1589 if (!gotvp) { 1590 if (newvp) { 1591 vput(newvp); 1592 newvp = NULL; 1593 } 1594 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1595 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1596 if (!error) 1597 newvp = NFSTOV(np); 1598 } 1599 } 1600 if (info.v3) { 1601 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1602 } 1603 m_freem(info.mrep); 1604 info.mrep = NULL; 1605 nfsmout: 1606 if (error) { 1607 if (newvp) 1608 vput(newvp); 1609 } else { 1610 *vpp = newvp; 1611 } 1612 VTONFS(dvp)->n_flag |= NLMODIFIED; 1613 if (!wccflag) 1614 VTONFS(dvp)->n_attrstamp = 0; 1615 return (error); 1616 } 1617 1618 /* 1619 * nfs mknod vop 1620 * just call nfs_mknodrpc() to do the work. 1621 * 1622 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 1623 * struct componentname *a_cnp, struct vattr *a_vap) 1624 */ 1625 /* ARGSUSED */ 1626 static int 1627 nfs_mknod(struct vop_old_mknod_args *ap) 1628 { 1629 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount); 1630 int error; 1631 1632 lwkt_gettoken(&nmp->nm_token); 1633 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1634 lwkt_reltoken(&nmp->nm_token); 1635 1636 return error; 1637 } 1638 1639 static u_long create_verf; 1640 /* 1641 * nfs file create call 1642 * 1643 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 1644 * struct componentname *a_cnp, struct vattr *a_vap) 1645 */ 1646 static int 1647 nfs_create(struct vop_old_create_args *ap) 1648 { 1649 struct vnode *dvp = ap->a_dvp; 1650 struct vattr *vap = ap->a_vap; 1651 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1652 struct componentname *cnp = ap->a_cnp; 1653 struct nfsv2_sattr *sp; 1654 u_int32_t *tl; 1655 struct nfsnode *np = NULL; 1656 struct vnode *newvp = NULL; 1657 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1658 struct vattr vattr; 1659 struct nfsm_info info; 1660 1661 info.mrep = NULL; 1662 info.v3 = NFS_ISV3(dvp); 1663 lwkt_gettoken(&nmp->nm_token); 1664 1665 /* 1666 * Oops, not for me.. 1667 */ 1668 if (vap->va_type == VSOCK) { 1669 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap); 1670 lwkt_reltoken(&nmp->nm_token); 1671 return error; 1672 } 1673 1674 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1675 lwkt_reltoken(&nmp->nm_token); 1676 return (error); 1677 } 1678 if (vap->va_vaflags & VA_EXCLUSIVE) 1679 fmode |= O_EXCL; 1680 again: 1681 nfsstats.rpccnt[NFSPROC_CREATE]++; 1682 nfsm_reqhead(&info, dvp, NFSPROC_CREATE, 1683 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED + 1684 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1685 ERROROUT(nfsm_fhtom(&info, dvp)); 1686 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1687 NFS_MAXNAMLEN)); 1688 if (info.v3) { 1689 tl = nfsm_build(&info, NFSX_UNSIGNED); 1690 if (fmode & O_EXCL) { 1691 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1692 tl = nfsm_build(&info, NFSX_V3CREATEVERF); 1693 #ifdef INET 1694 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) 1695 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr; 1696 else 1697 #endif 1698 *tl++ = create_verf; 1699 *tl = ++create_verf; 1700 } else { 1701 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1702 nfsm_v3attrbuild(&info, vap, FALSE); 1703 } 1704 } else { 1705 sp = nfsm_build(&info, NFSX_V2SATTR); 1706 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1707 sp->sa_uid = nfs_xdrneg1; 1708 sp->sa_gid = nfs_xdrneg1; 1709 sp->sa_size = 0; 1710 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1711 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1712 } 1713 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td, 1714 cnp->cn_cred, &error)); 1715 if (error == 0) { 1716 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1717 if (!gotvp) { 1718 if (newvp) { 1719 vput(newvp); 1720 newvp = NULL; 1721 } 1722 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1723 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1724 if (!error) 1725 newvp = NFSTOV(np); 1726 } 1727 } 1728 if (info.v3) { 1729 if (error == 0) 1730 error = nfsm_wcc_data(&info, dvp, &wccflag); 1731 else 1732 (void)nfsm_wcc_data(&info, dvp, &wccflag); 1733 } 1734 m_freem(info.mrep); 1735 info.mrep = NULL; 1736 nfsmout: 1737 if (error) { 1738 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1739 KKASSERT(newvp == NULL); 1740 fmode &= ~O_EXCL; 1741 goto again; 1742 } 1743 } else if (info.v3 && (fmode & O_EXCL)) { 1744 /* 1745 * We are normally called with only a partially initialized 1746 * VAP. Since the NFSv3 spec says that server may use the 1747 * file attributes to store the verifier, the spec requires 1748 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1749 * in atime, but we can't really assume that all servers will 1750 * so we ensure that our SETATTR sets both atime and mtime. 1751 */ 1752 if (vap->va_mtime.tv_sec == VNOVAL) 1753 vfs_timestamp(&vap->va_mtime); 1754 if (vap->va_atime.tv_sec == VNOVAL) 1755 vap->va_atime = vap->va_mtime; 1756 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); 1757 } 1758 if (error == 0) { 1759 /* 1760 * The new np may have enough info for access 1761 * checks, make sure rucred and wucred are 1762 * initialized for read and write rpc's. 1763 */ 1764 np = VTONFS(newvp); 1765 if (np->n_rucred == NULL) 1766 np->n_rucred = crhold(cnp->cn_cred); 1767 if (np->n_wucred == NULL) 1768 np->n_wucred = crhold(cnp->cn_cred); 1769 *ap->a_vpp = newvp; 1770 } else if (newvp) { 1771 vput(newvp); 1772 } 1773 VTONFS(dvp)->n_flag |= NLMODIFIED; 1774 if (!wccflag) 1775 VTONFS(dvp)->n_attrstamp = 0; 1776 lwkt_reltoken(&nmp->nm_token); 1777 return (error); 1778 } 1779 1780 /* 1781 * nfs file remove call 1782 * To try and make nfs semantics closer to ufs semantics, a file that has 1783 * other processes using the vnode is renamed instead of removed and then 1784 * removed later on the last close. 1785 * - If v_sysref.refcnt > 1 1786 * If a rename is not already in the works 1787 * call nfs_sillyrename() to set it up 1788 * else 1789 * do the remove rpc 1790 * 1791 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 1792 * struct componentname *a_cnp) 1793 */ 1794 static int 1795 nfs_remove(struct vop_old_remove_args *ap) 1796 { 1797 struct vnode *vp = ap->a_vp; 1798 struct vnode *dvp = ap->a_dvp; 1799 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1800 struct componentname *cnp = ap->a_cnp; 1801 struct nfsnode *np = VTONFS(vp); 1802 int error = 0; 1803 struct vattr vattr; 1804 1805 lwkt_gettoken(&nmp->nm_token); 1806 #ifndef DIAGNOSTIC 1807 if (vp->v_sysref.refcnt < 1) 1808 panic("nfs_remove: bad v_sysref.refcnt"); 1809 #endif 1810 if (vp->v_type == VDIR) { 1811 error = EPERM; 1812 } else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename && 1813 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) { 1814 /* 1815 * throw away biocache buffers, mainly to avoid 1816 * unnecessary delayed writes later. 1817 */ 1818 error = nfs_vinvalbuf(vp, 0, 1); 1819 /* Do the rpc */ 1820 if (error != EINTR) 1821 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1822 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); 1823 /* 1824 * Kludge City: If the first reply to the remove rpc is lost.. 1825 * the reply to the retransmitted request will be ENOENT 1826 * since the file was in fact removed 1827 * Therefore, we cheat and return success. 1828 */ 1829 if (error == ENOENT) 1830 error = 0; 1831 } else if (!np->n_sillyrename) { 1832 error = nfs_sillyrename(dvp, vp, cnp); 1833 } 1834 np->n_attrstamp = 0; 1835 lwkt_reltoken(&nmp->nm_token); 1836 1837 return (error); 1838 } 1839 1840 /* 1841 * nfs file remove rpc called from nfs_inactive 1842 */ 1843 int 1844 nfs_removeit(struct sillyrename *sp) 1845 { 1846 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, 1847 sp->s_cred, NULL)); 1848 } 1849 1850 /* 1851 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1852 */ 1853 static int 1854 nfs_removerpc(struct vnode *dvp, const char *name, int namelen, 1855 struct ucred *cred, struct thread *td) 1856 { 1857 int error = 0, wccflag = NFSV3_WCCRATTR; 1858 struct nfsm_info info; 1859 1860 info.mrep = NULL; 1861 info.v3 = NFS_ISV3(dvp); 1862 1863 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1864 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE, 1865 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1866 ERROROUT(nfsm_fhtom(&info, dvp)); 1867 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN)); 1868 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error)); 1869 if (info.v3) { 1870 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1871 } 1872 m_freem(info.mrep); 1873 info.mrep = NULL; 1874 nfsmout: 1875 VTONFS(dvp)->n_flag |= NLMODIFIED; 1876 if (!wccflag) 1877 VTONFS(dvp)->n_attrstamp = 0; 1878 return (error); 1879 } 1880 1881 /* 1882 * nfs file rename call 1883 * 1884 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 1885 * struct componentname *a_fcnp, struct vnode *a_tdvp, 1886 * struct vnode *a_tvp, struct componentname *a_tcnp) 1887 */ 1888 static int 1889 nfs_rename(struct vop_old_rename_args *ap) 1890 { 1891 struct vnode *fvp = ap->a_fvp; 1892 struct vnode *tvp = ap->a_tvp; 1893 struct vnode *fdvp = ap->a_fdvp; 1894 struct vnode *tdvp = ap->a_tdvp; 1895 struct componentname *tcnp = ap->a_tcnp; 1896 struct componentname *fcnp = ap->a_fcnp; 1897 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount); 1898 int error; 1899 1900 lwkt_gettoken(&nmp->nm_token); 1901 1902 /* Check for cross-device rename */ 1903 if ((fvp->v_mount != tdvp->v_mount) || 1904 (tvp && (fvp->v_mount != tvp->v_mount))) { 1905 error = EXDEV; 1906 goto out; 1907 } 1908 1909 /* 1910 * We shouldn't have to flush fvp on rename for most server-side 1911 * filesystems as the file handle should not change. Unfortunately 1912 * the inode for some filesystems (msdosfs) might be tied to the 1913 * file name or directory position so to be completely safe 1914 * vfs.nfs.flush_on_rename is set by default. Clear to improve 1915 * performance. 1916 * 1917 * We must flush tvp on rename because it might become stale on the 1918 * server after the rename. 1919 */ 1920 if (nfs_flush_on_rename) 1921 VOP_FSYNC(fvp, MNT_WAIT, 0); 1922 if (tvp) 1923 VOP_FSYNC(tvp, MNT_WAIT, 0); 1924 1925 /* 1926 * If the tvp exists and is in use, sillyrename it before doing the 1927 * rename of the new file over it. 1928 * 1929 * XXX Can't sillyrename a directory. 1930 * 1931 * We do not attempt to do any namecache purges in this old API 1932 * routine. The new API compat functions have access to the actual 1933 * namecache structures and will do it for us. 1934 */ 1935 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename && 1936 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1937 vput(tvp); 1938 tvp = NULL; 1939 } else if (tvp) { 1940 ; 1941 } 1942 1943 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1944 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1945 tcnp->cn_td); 1946 1947 out: 1948 lwkt_reltoken(&nmp->nm_token); 1949 if (tdvp == tvp) 1950 vrele(tdvp); 1951 else 1952 vput(tdvp); 1953 if (tvp) 1954 vput(tvp); 1955 vrele(fdvp); 1956 vrele(fvp); 1957 /* 1958 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1959 */ 1960 if (error == ENOENT) 1961 error = 0; 1962 return (error); 1963 } 1964 1965 /* 1966 * nfs file rename rpc called from nfs_remove() above 1967 */ 1968 static int 1969 nfs_renameit(struct vnode *sdvp, struct componentname *scnp, 1970 struct sillyrename *sp) 1971 { 1972 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1973 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); 1974 } 1975 1976 /* 1977 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1978 */ 1979 static int 1980 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, 1981 struct vnode *tdvp, const char *tnameptr, int tnamelen, 1982 struct ucred *cred, struct thread *td) 1983 { 1984 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1985 struct nfsm_info info; 1986 1987 info.mrep = NULL; 1988 info.v3 = NFS_ISV3(fdvp); 1989 1990 nfsstats.rpccnt[NFSPROC_RENAME]++; 1991 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME, 1992 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 + 1993 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen)); 1994 ERROROUT(nfsm_fhtom(&info, fdvp)); 1995 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN)); 1996 ERROROUT(nfsm_fhtom(&info, tdvp)); 1997 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN)); 1998 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error)); 1999 if (info.v3) { 2000 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag)); 2001 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag)); 2002 } 2003 m_freem(info.mrep); 2004 info.mrep = NULL; 2005 nfsmout: 2006 VTONFS(fdvp)->n_flag |= NLMODIFIED; 2007 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2008 if (!fwccflag) 2009 VTONFS(fdvp)->n_attrstamp = 0; 2010 if (!twccflag) 2011 VTONFS(tdvp)->n_attrstamp = 0; 2012 return (error); 2013 } 2014 2015 /* 2016 * nfs hard link create call 2017 * 2018 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 2019 * struct componentname *a_cnp) 2020 */ 2021 static int 2022 nfs_link(struct vop_old_link_args *ap) 2023 { 2024 struct vnode *vp = ap->a_vp; 2025 struct vnode *tdvp = ap->a_tdvp; 2026 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount); 2027 struct componentname *cnp = ap->a_cnp; 2028 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2029 struct nfsm_info info; 2030 2031 if (vp->v_mount != tdvp->v_mount) { 2032 return (EXDEV); 2033 } 2034 lwkt_gettoken(&nmp->nm_token); 2035 2036 /* 2037 * The attribute cache may get out of sync with the server on link. 2038 * Pushing writes to the server before handle was inherited from 2039 * long long ago and it is unclear if we still need to do this. 2040 * Defaults to off. 2041 */ 2042 if (nfs_flush_on_hlink) 2043 VOP_FSYNC(vp, MNT_WAIT, 0); 2044 2045 info.mrep = NULL; 2046 info.v3 = NFS_ISV3(vp); 2047 2048 nfsstats.rpccnt[NFSPROC_LINK]++; 2049 nfsm_reqhead(&info, vp, NFSPROC_LINK, 2050 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED + 2051 nfsm_rndup(cnp->cn_namelen)); 2052 ERROROUT(nfsm_fhtom(&info, vp)); 2053 ERROROUT(nfsm_fhtom(&info, tdvp)); 2054 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2055 NFS_MAXNAMLEN)); 2056 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td, 2057 cnp->cn_cred, &error)); 2058 if (info.v3) { 2059 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2060 NFS_LATTR_NOSHRINK)); 2061 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag)); 2062 } 2063 m_freem(info.mrep); 2064 info.mrep = NULL; 2065 nfsmout: 2066 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2067 if (!attrflag) 2068 VTONFS(vp)->n_attrstamp = 0; 2069 if (!wccflag) 2070 VTONFS(tdvp)->n_attrstamp = 0; 2071 /* 2072 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2073 */ 2074 if (error == EEXIST) 2075 error = 0; 2076 lwkt_reltoken(&nmp->nm_token); 2077 return (error); 2078 } 2079 2080 /* 2081 * nfs symbolic link create call 2082 * 2083 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 2084 * struct componentname *a_cnp, struct vattr *a_vap, 2085 * char *a_target) 2086 */ 2087 static int 2088 nfs_symlink(struct vop_old_symlink_args *ap) 2089 { 2090 struct vnode *dvp = ap->a_dvp; 2091 struct vattr *vap = ap->a_vap; 2092 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2093 struct componentname *cnp = ap->a_cnp; 2094 struct nfsv2_sattr *sp; 2095 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2096 struct vnode *newvp = NULL; 2097 struct nfsm_info info; 2098 2099 info.mrep = NULL; 2100 info.v3 = NFS_ISV3(dvp); 2101 lwkt_gettoken(&nmp->nm_token); 2102 2103 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2104 slen = strlen(ap->a_target); 2105 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK, 2106 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED + 2107 nfsm_rndup(cnp->cn_namelen) + 2108 nfsm_rndup(slen) + NFSX_SATTR(info.v3)); 2109 ERROROUT(nfsm_fhtom(&info, dvp)); 2110 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2111 NFS_MAXNAMLEN)); 2112 if (info.v3) { 2113 nfsm_v3attrbuild(&info, vap, FALSE); 2114 } 2115 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN)); 2116 if (info.v3 == 0) { 2117 sp = nfsm_build(&info, NFSX_V2SATTR); 2118 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2119 sp->sa_uid = nfs_xdrneg1; 2120 sp->sa_gid = nfs_xdrneg1; 2121 sp->sa_size = nfs_xdrneg1; 2122 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2123 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2124 } 2125 2126 /* 2127 * Issue the NFS request and get the rpc response. 2128 * 2129 * Only NFSv3 responses returning an error of 0 actually return 2130 * a file handle that can be converted into newvp without having 2131 * to do an extra lookup rpc. 2132 */ 2133 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td, 2134 cnp->cn_cred, &error)); 2135 if (info.v3) { 2136 if (error == 0) { 2137 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2138 } 2139 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2140 } 2141 2142 /* 2143 * out code jumps -> here, mrep is also freed. 2144 */ 2145 2146 m_freem(info.mrep); 2147 info.mrep = NULL; 2148 nfsmout: 2149 2150 /* 2151 * If we get an EEXIST error, silently convert it to no-error 2152 * in case of an NFS retry. 2153 */ 2154 if (error == EEXIST) 2155 error = 0; 2156 2157 /* 2158 * If we do not have (or no longer have) an error, and we could 2159 * not extract the newvp from the response due to the request being 2160 * NFSv2 or the error being EEXIST. We have to do a lookup in order 2161 * to obtain a newvp to return. 2162 */ 2163 if (error == 0 && newvp == NULL) { 2164 struct nfsnode *np = NULL; 2165 2166 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2167 cnp->cn_cred, cnp->cn_td, &np); 2168 if (!error) 2169 newvp = NFSTOV(np); 2170 } 2171 if (error) { 2172 if (newvp) 2173 vput(newvp); 2174 } else { 2175 *ap->a_vpp = newvp; 2176 } 2177 VTONFS(dvp)->n_flag |= NLMODIFIED; 2178 if (!wccflag) 2179 VTONFS(dvp)->n_attrstamp = 0; 2180 lwkt_reltoken(&nmp->nm_token); 2181 2182 return (error); 2183 } 2184 2185 /* 2186 * nfs make dir call 2187 * 2188 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 2189 * struct componentname *a_cnp, struct vattr *a_vap) 2190 */ 2191 static int 2192 nfs_mkdir(struct vop_old_mkdir_args *ap) 2193 { 2194 struct vnode *dvp = ap->a_dvp; 2195 struct vattr *vap = ap->a_vap; 2196 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2197 struct componentname *cnp = ap->a_cnp; 2198 struct nfsv2_sattr *sp; 2199 struct nfsnode *np = NULL; 2200 struct vnode *newvp = NULL; 2201 struct vattr vattr; 2202 int error = 0, wccflag = NFSV3_WCCRATTR; 2203 int gotvp = 0; 2204 int len; 2205 struct nfsm_info info; 2206 2207 info.mrep = NULL; 2208 info.v3 = NFS_ISV3(dvp); 2209 lwkt_gettoken(&nmp->nm_token); 2210 2211 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 2212 lwkt_reltoken(&nmp->nm_token); 2213 return (error); 2214 } 2215 len = cnp->cn_namelen; 2216 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2217 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR, 2218 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2219 nfsm_rndup(len) + NFSX_SATTR(info.v3)); 2220 ERROROUT(nfsm_fhtom(&info, dvp)); 2221 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 2222 if (info.v3) { 2223 nfsm_v3attrbuild(&info, vap, FALSE); 2224 } else { 2225 sp = nfsm_build(&info, NFSX_V2SATTR); 2226 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2227 sp->sa_uid = nfs_xdrneg1; 2228 sp->sa_gid = nfs_xdrneg1; 2229 sp->sa_size = nfs_xdrneg1; 2230 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2231 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2232 } 2233 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td, 2234 cnp->cn_cred, &error)); 2235 if (error == 0) { 2236 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2237 } 2238 if (info.v3) { 2239 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2240 } 2241 m_freem(info.mrep); 2242 info.mrep = NULL; 2243 nfsmout: 2244 VTONFS(dvp)->n_flag |= NLMODIFIED; 2245 if (!wccflag) 2246 VTONFS(dvp)->n_attrstamp = 0; 2247 /* 2248 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2249 * if we can succeed in looking up the directory. 2250 */ 2251 if (error == EEXIST || (!error && !gotvp)) { 2252 if (newvp) { 2253 vrele(newvp); 2254 newvp = NULL; 2255 } 2256 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2257 cnp->cn_td, &np); 2258 if (!error) { 2259 newvp = NFSTOV(np); 2260 if (newvp->v_type != VDIR) 2261 error = EEXIST; 2262 } 2263 } 2264 if (error) { 2265 if (newvp) 2266 vrele(newvp); 2267 } else { 2268 *ap->a_vpp = newvp; 2269 } 2270 lwkt_reltoken(&nmp->nm_token); 2271 return (error); 2272 } 2273 2274 /* 2275 * nfs remove directory call 2276 * 2277 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 2278 * struct componentname *a_cnp) 2279 */ 2280 static int 2281 nfs_rmdir(struct vop_old_rmdir_args *ap) 2282 { 2283 struct vnode *vp = ap->a_vp; 2284 struct vnode *dvp = ap->a_dvp; 2285 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2286 struct componentname *cnp = ap->a_cnp; 2287 int error = 0, wccflag = NFSV3_WCCRATTR; 2288 struct nfsm_info info; 2289 2290 info.mrep = NULL; 2291 info.v3 = NFS_ISV3(dvp); 2292 2293 if (dvp == vp) 2294 return (EINVAL); 2295 2296 lwkt_gettoken(&nmp->nm_token); 2297 2298 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2299 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR, 2300 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2301 nfsm_rndup(cnp->cn_namelen)); 2302 ERROROUT(nfsm_fhtom(&info, dvp)); 2303 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2304 NFS_MAXNAMLEN)); 2305 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td, 2306 cnp->cn_cred, &error)); 2307 if (info.v3) { 2308 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2309 } 2310 m_freem(info.mrep); 2311 info.mrep = NULL; 2312 nfsmout: 2313 VTONFS(dvp)->n_flag |= NLMODIFIED; 2314 if (!wccflag) 2315 VTONFS(dvp)->n_attrstamp = 0; 2316 /* 2317 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2318 */ 2319 if (error == ENOENT) 2320 error = 0; 2321 lwkt_reltoken(&nmp->nm_token); 2322 2323 return (error); 2324 } 2325 2326 /* 2327 * nfs readdir call 2328 * 2329 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 2330 */ 2331 static int 2332 nfs_readdir(struct vop_readdir_args *ap) 2333 { 2334 struct vnode *vp = ap->a_vp; 2335 struct nfsnode *np = VTONFS(vp); 2336 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2337 struct uio *uio = ap->a_uio; 2338 int tresid, error; 2339 struct vattr vattr; 2340 2341 if (vp->v_type != VDIR) 2342 return (EPERM); 2343 2344 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 2345 return (error); 2346 2347 lwkt_gettoken(&nmp->nm_token); 2348 2349 /* 2350 * If we have a valid EOF offset cache we must call VOP_GETATTR() 2351 * and then check that is still valid, or if this is an NQNFS mount 2352 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that 2353 * VOP_GETATTR() does not necessarily go to the wire. 2354 */ 2355 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2356 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) { 2357 if (VOP_GETATTR(vp, &vattr) == 0 && 2358 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0 2359 ) { 2360 nfsstats.direofcache_hits++; 2361 goto done; 2362 } 2363 } 2364 2365 /* 2366 * Call nfs_bioread() to do the real work. nfs_bioread() does its 2367 * own cache coherency checks so we do not have to. 2368 */ 2369 tresid = uio->uio_resid; 2370 error = nfs_bioread(vp, uio, 0); 2371 2372 if (!error && uio->uio_resid == tresid) 2373 nfsstats.direofcache_misses++; 2374 done: 2375 lwkt_reltoken(&nmp->nm_token); 2376 vn_unlock(vp); 2377 2378 return (error); 2379 } 2380 2381 /* 2382 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc. 2383 * 2384 * Note that for directories, nfs_bioread maintains the underlying nfs-centric 2385 * offset/block and converts the nfs formatted directory entries for userland 2386 * consumption as well as deals with offsets into the middle of blocks. 2387 * nfs_doio only deals with logical blocks. In particular, uio_offset will 2388 * be block-bounded. It must convert to cookies for the actual RPC. 2389 */ 2390 int 2391 nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop) 2392 { 2393 int len, left; 2394 struct nfs_dirent *dp = NULL; 2395 u_int32_t *tl; 2396 nfsuint64 *cookiep; 2397 caddr_t cp; 2398 nfsuint64 cookie; 2399 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2400 struct nfsnode *dnp = VTONFS(vp); 2401 u_quad_t fileno; 2402 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2403 int attrflag; 2404 struct nfsm_info info; 2405 2406 info.mrep = NULL; 2407 info.v3 = NFS_ISV3(vp); 2408 2409 #ifndef DIAGNOSTIC 2410 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2411 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2412 panic("nfs readdirrpc bad uio"); 2413 #endif 2414 2415 /* 2416 * If there is no cookie, assume directory was stale. 2417 */ 2418 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2419 if (cookiep) 2420 cookie = *cookiep; 2421 else 2422 return (NFSERR_BAD_COOKIE); 2423 /* 2424 * Loop around doing readdir rpc's of size nm_readdirsize 2425 * truncated to a multiple of DIRBLKSIZ. 2426 * The stopping criteria is EOF or buffer full. 2427 */ 2428 while (more_dirs && bigenough) { 2429 nfsstats.rpccnt[NFSPROC_READDIR]++; 2430 nfsm_reqhead(&info, vp, NFSPROC_READDIR, 2431 NFSX_FH(info.v3) + NFSX_READDIR(info.v3)); 2432 ERROROUT(nfsm_fhtom(&info, vp)); 2433 if (info.v3) { 2434 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 2435 *tl++ = cookie.nfsuquad[0]; 2436 *tl++ = cookie.nfsuquad[1]; 2437 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2438 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2439 } else { 2440 /* 2441 * WARNING! HAMMER DIRECTORIES WILL NOT WORK WELL 2442 * WITH NFSv2!!! There's nothing I can really do 2443 * about it other than to hope the server supports 2444 * rdirplus w/NFSv2. 2445 */ 2446 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 2447 *tl++ = cookie.nfsuquad[0]; 2448 } 2449 *tl = txdr_unsigned(nmp->nm_readdirsize); 2450 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR, 2451 uiop->uio_td, 2452 nfs_vpcred(vp, ND_READ), &error)); 2453 if (info.v3) { 2454 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2455 NFS_LATTR_NOSHRINK)); 2456 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2457 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2458 dnp->n_cookieverf.nfsuquad[1] = *tl; 2459 } 2460 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2461 more_dirs = fxdr_unsigned(int, *tl); 2462 2463 /* loop thru the dir entries, converting them to std form */ 2464 while (more_dirs && bigenough) { 2465 if (info.v3) { 2466 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2467 fileno = fxdr_hyper(tl); 2468 len = fxdr_unsigned(int, *(tl + 2)); 2469 } else { 2470 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2471 fileno = fxdr_unsigned(u_quad_t, *tl++); 2472 len = fxdr_unsigned(int, *tl); 2473 } 2474 if (len <= 0 || len > NFS_MAXNAMLEN) { 2475 error = EBADRPC; 2476 m_freem(info.mrep); 2477 info.mrep = NULL; 2478 goto nfsmout; 2479 } 2480 2481 /* 2482 * len is the number of bytes in the path element 2483 * name, not including the \0 termination. 2484 * 2485 * tlen is the number of bytes w have to reserve for 2486 * the path element name. 2487 */ 2488 tlen = nfsm_rndup(len); 2489 if (tlen == len) 2490 tlen += 4; /* To ensure null termination */ 2491 2492 /* 2493 * If the entry would cross a DIRBLKSIZ boundary, 2494 * extend the previous nfs_dirent to cover the 2495 * remaining space. 2496 */ 2497 left = DIRBLKSIZ - blksiz; 2498 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2499 dp->nfs_reclen += left; 2500 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2501 uiop->uio_iov->iov_len -= left; 2502 uiop->uio_offset += left; 2503 uiop->uio_resid -= left; 2504 blksiz = 0; 2505 } 2506 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2507 bigenough = 0; 2508 if (bigenough) { 2509 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2510 dp->nfs_ino = fileno; 2511 dp->nfs_namlen = len; 2512 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2513 dp->nfs_type = DT_UNKNOWN; 2514 blksiz += dp->nfs_reclen; 2515 if (blksiz == DIRBLKSIZ) 2516 blksiz = 0; 2517 uiop->uio_offset += sizeof(struct nfs_dirent); 2518 uiop->uio_resid -= sizeof(struct nfs_dirent); 2519 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2520 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2521 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2522 2523 /* 2524 * The uiop has advanced by nfs_dirent + len 2525 * but really needs to advance by 2526 * nfs_dirent + tlen 2527 */ 2528 cp = uiop->uio_iov->iov_base; 2529 tlen -= len; 2530 *cp = '\0'; /* null terminate */ 2531 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2532 uiop->uio_iov->iov_len -= tlen; 2533 uiop->uio_offset += tlen; 2534 uiop->uio_resid -= tlen; 2535 } else { 2536 /* 2537 * NFS strings must be rounded up (nfsm_myouio 2538 * handled that in the bigenough case). 2539 */ 2540 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2541 } 2542 if (info.v3) { 2543 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2544 } else { 2545 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2546 } 2547 2548 /* 2549 * If we were able to accomodate the last entry, 2550 * get the cookie for the next one. Otherwise 2551 * hold-over the cookie for the one we were not 2552 * able to accomodate. 2553 */ 2554 if (bigenough) { 2555 cookie.nfsuquad[0] = *tl++; 2556 if (info.v3) 2557 cookie.nfsuquad[1] = *tl++; 2558 } else if (info.v3) { 2559 tl += 2; 2560 } else { 2561 tl++; 2562 } 2563 more_dirs = fxdr_unsigned(int, *tl); 2564 } 2565 /* 2566 * If at end of rpc data, get the eof boolean 2567 */ 2568 if (!more_dirs) { 2569 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2570 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2571 } 2572 m_freem(info.mrep); 2573 info.mrep = NULL; 2574 } 2575 /* 2576 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2577 * by increasing d_reclen for the last record. 2578 */ 2579 if (blksiz > 0) { 2580 left = DIRBLKSIZ - blksiz; 2581 dp->nfs_reclen += left; 2582 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2583 uiop->uio_iov->iov_len -= left; 2584 uiop->uio_offset += left; 2585 uiop->uio_resid -= left; 2586 } 2587 2588 if (bigenough) { 2589 /* 2590 * We hit the end of the directory, update direofoffset. 2591 */ 2592 dnp->n_direofoffset = uiop->uio_offset; 2593 } else { 2594 /* 2595 * There is more to go, insert the link cookie so the 2596 * next block can be read. 2597 */ 2598 if (uiop->uio_resid > 0) 2599 kprintf("EEK! readdirrpc resid > 0\n"); 2600 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2601 *cookiep = cookie; 2602 } 2603 nfsmout: 2604 return (error); 2605 } 2606 2607 /* 2608 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2609 */ 2610 int 2611 nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop) 2612 { 2613 int len, left; 2614 struct nfs_dirent *dp; 2615 u_int32_t *tl; 2616 struct vnode *newvp; 2617 nfsuint64 *cookiep; 2618 caddr_t dpossav1, dpossav2; 2619 caddr_t cp; 2620 struct mbuf *mdsav1, *mdsav2; 2621 nfsuint64 cookie; 2622 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2623 struct nfsnode *dnp = VTONFS(vp), *np; 2624 nfsfh_t *fhp; 2625 u_quad_t fileno; 2626 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2627 int attrflag, fhsize; 2628 struct nchandle nch; 2629 struct nchandle dnch; 2630 struct nlcomponent nlc; 2631 struct nfsm_info info; 2632 2633 info.mrep = NULL; 2634 info.v3 = 1; 2635 2636 #ifndef nolint 2637 dp = NULL; 2638 #endif 2639 #ifndef DIAGNOSTIC 2640 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2641 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2642 panic("nfs readdirplusrpc bad uio"); 2643 #endif 2644 /* 2645 * Obtain the namecache record for the directory so we have something 2646 * to use as a basis for creating the entries. This function will 2647 * return a held (but not locked) ncp. The ncp may be disconnected 2648 * from the tree and cannot be used for upward traversals, and the 2649 * ncp may be unnamed. Note that other unrelated operations may 2650 * cause the ncp to be named at any time. 2651 * 2652 * We have to lock the ncp to prevent a lock order reversal when 2653 * rdirplus does nlookups of the children, because the vnode is 2654 * locked and has to stay that way. 2655 */ 2656 cache_fromdvp(vp, NULL, 0, &dnch); 2657 bzero(&nlc, sizeof(nlc)); 2658 newvp = NULLVP; 2659 2660 /* 2661 * If there is no cookie, assume directory was stale. 2662 */ 2663 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2664 if (cookiep) { 2665 cookie = *cookiep; 2666 } else { 2667 if (dnch.ncp) 2668 cache_drop(&dnch); 2669 return (NFSERR_BAD_COOKIE); 2670 } 2671 2672 /* 2673 * Loop around doing readdir rpc's of size nm_readdirsize 2674 * truncated to a multiple of DIRBLKSIZ. 2675 * The stopping criteria is EOF or buffer full. 2676 */ 2677 while (more_dirs && bigenough) { 2678 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2679 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS, 2680 NFSX_FH(info.v3) + 6 * NFSX_UNSIGNED); 2681 ERROROUT(nfsm_fhtom(&info, vp)); 2682 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED); 2683 *tl++ = cookie.nfsuquad[0]; 2684 *tl++ = cookie.nfsuquad[1]; 2685 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2686 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2687 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2688 *tl = txdr_unsigned(nmp->nm_rsize); 2689 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS, 2690 uiop->uio_td, 2691 nfs_vpcred(vp, ND_READ), &error)); 2692 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2693 NFS_LATTR_NOSHRINK)); 2694 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2695 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2696 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2697 more_dirs = fxdr_unsigned(int, *tl); 2698 2699 /* loop thru the dir entries, doctoring them to 4bsd form */ 2700 while (more_dirs && bigenough) { 2701 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2702 fileno = fxdr_hyper(tl); 2703 len = fxdr_unsigned(int, *(tl + 2)); 2704 if (len <= 0 || len > NFS_MAXNAMLEN) { 2705 error = EBADRPC; 2706 m_freem(info.mrep); 2707 info.mrep = NULL; 2708 goto nfsmout; 2709 } 2710 tlen = nfsm_rndup(len); 2711 if (tlen == len) 2712 tlen += 4; /* To ensure null termination*/ 2713 left = DIRBLKSIZ - blksiz; 2714 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2715 dp->nfs_reclen += left; 2716 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2717 uiop->uio_iov->iov_len -= left; 2718 uiop->uio_offset += left; 2719 uiop->uio_resid -= left; 2720 blksiz = 0; 2721 } 2722 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2723 bigenough = 0; 2724 if (bigenough) { 2725 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2726 dp->nfs_ino = fileno; 2727 dp->nfs_namlen = len; 2728 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2729 dp->nfs_type = DT_UNKNOWN; 2730 blksiz += dp->nfs_reclen; 2731 if (blksiz == DIRBLKSIZ) 2732 blksiz = 0; 2733 uiop->uio_offset += sizeof(struct nfs_dirent); 2734 uiop->uio_resid -= sizeof(struct nfs_dirent); 2735 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2736 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2737 nlc.nlc_nameptr = uiop->uio_iov->iov_base; 2738 nlc.nlc_namelen = len; 2739 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2740 cp = uiop->uio_iov->iov_base; 2741 tlen -= len; 2742 *cp = '\0'; 2743 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2744 uiop->uio_iov->iov_len -= tlen; 2745 uiop->uio_offset += tlen; 2746 uiop->uio_resid -= tlen; 2747 } else { 2748 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2749 } 2750 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2751 if (bigenough) { 2752 cookie.nfsuquad[0] = *tl++; 2753 cookie.nfsuquad[1] = *tl++; 2754 } else { 2755 tl += 2; 2756 } 2757 2758 /* 2759 * Since the attributes are before the file handle 2760 * (sigh), we must skip over the attributes and then 2761 * come back and get them. 2762 */ 2763 attrflag = fxdr_unsigned(int, *tl); 2764 if (attrflag) { 2765 dpossav1 = info.dpos; 2766 mdsav1 = info.md; 2767 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR)); 2768 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2769 doit = fxdr_unsigned(int, *tl); 2770 if (doit) { 2771 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 2772 } 2773 if (doit && bigenough && !nlcdegenerate(&nlc) && 2774 !NFS_CMPFH(dnp, fhp, fhsize) 2775 ) { 2776 if (dnch.ncp) { 2777 #if 0 2778 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n", 2779 nlc.nlc_namelen, nlc.nlc_namelen, 2780 nlc.nlc_nameptr); 2781 #endif 2782 /* 2783 * This is a bit hokey but there isn't 2784 * much we can do about it. We can't 2785 * hold the directory vp locked while 2786 * doing lookups and gets. 2787 */ 2788 nch = cache_nlookup_nonblock(&dnch, &nlc); 2789 if (nch.ncp == NULL) 2790 goto rdfail; 2791 cache_setunresolved(&nch); 2792 error = nfs_nget_nonblock(vp->v_mount, fhp, 2793 fhsize, &np); 2794 if (error) { 2795 cache_put(&nch); 2796 goto rdfail; 2797 } 2798 newvp = NFSTOV(np); 2799 dpossav2 = info.dpos; 2800 info.dpos = dpossav1; 2801 mdsav2 = info.md; 2802 info.md = mdsav1; 2803 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 2804 info.dpos = dpossav2; 2805 info.md = mdsav2; 2806 dp->nfs_type = 2807 IFTODT(VTTOIF(np->n_vattr.va_type)); 2808 nfs_cache_setvp(&nch, newvp, 2809 nfspos_cache_timeout); 2810 vput(newvp); 2811 newvp = NULLVP; 2812 cache_put(&nch); 2813 } else { 2814 rdfail: 2815 ; 2816 #if 0 2817 kprintf("Warning: NFS/rddirplus, " 2818 "UNABLE TO ENTER %*.*s\n", 2819 nlc.nlc_namelen, nlc.nlc_namelen, 2820 nlc.nlc_nameptr); 2821 #endif 2822 } 2823 } 2824 } else { 2825 /* Just skip over the file handle */ 2826 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2827 i = fxdr_unsigned(int, *tl); 2828 ERROROUT(nfsm_adv(&info, nfsm_rndup(i))); 2829 } 2830 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2831 more_dirs = fxdr_unsigned(int, *tl); 2832 } 2833 /* 2834 * If at end of rpc data, get the eof boolean 2835 */ 2836 if (!more_dirs) { 2837 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2838 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2839 } 2840 m_freem(info.mrep); 2841 info.mrep = NULL; 2842 } 2843 /* 2844 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2845 * by increasing d_reclen for the last record. 2846 */ 2847 if (blksiz > 0) { 2848 left = DIRBLKSIZ - blksiz; 2849 dp->nfs_reclen += left; 2850 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2851 uiop->uio_iov->iov_len -= left; 2852 uiop->uio_offset += left; 2853 uiop->uio_resid -= left; 2854 } 2855 2856 /* 2857 * We are now either at the end of the directory or have filled the 2858 * block. 2859 */ 2860 if (bigenough) { 2861 dnp->n_direofoffset = uiop->uio_offset; 2862 } else { 2863 if (uiop->uio_resid > 0) 2864 kprintf("EEK! readdirplusrpc resid > 0\n"); 2865 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2866 *cookiep = cookie; 2867 } 2868 nfsmout: 2869 if (newvp != NULLVP) { 2870 if (newvp == vp) 2871 vrele(newvp); 2872 else 2873 vput(newvp); 2874 newvp = NULLVP; 2875 } 2876 if (dnch.ncp) 2877 cache_drop(&dnch); 2878 return (error); 2879 } 2880 2881 /* 2882 * Silly rename. To make the NFS filesystem that is stateless look a little 2883 * more like the "ufs" a remove of an active vnode is translated to a rename 2884 * to a funny looking filename that is removed by nfs_inactive on the 2885 * nfsnode. There is the potential for another process on a different client 2886 * to create the same funny name between the nfs_lookitup() fails and the 2887 * nfs_rename() completes, but... 2888 */ 2889 static int 2890 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2891 { 2892 struct sillyrename *sp; 2893 struct nfsnode *np; 2894 int error; 2895 2896 /* 2897 * We previously purged dvp instead of vp. I don't know why, it 2898 * completely destroys performance. We can't do it anyway with the 2899 * new VFS API since we would be breaking the namecache topology. 2900 */ 2901 cache_purge(vp); /* XXX */ 2902 np = VTONFS(vp); 2903 #ifndef DIAGNOSTIC 2904 if (vp->v_type == VDIR) 2905 panic("nfs: sillyrename dir"); 2906 #endif 2907 sp = kmalloc(sizeof(struct sillyrename), M_NFSREQ, M_WAITOK); 2908 sp->s_cred = crdup(cnp->cn_cred); 2909 sp->s_dvp = dvp; 2910 vref(dvp); 2911 2912 /* Fudge together a funny name */ 2913 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", 2914 (int)(intptr_t)cnp->cn_td); 2915 2916 /* Try lookitups until we get one that isn't there */ 2917 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2918 cnp->cn_td, NULL) == 0) { 2919 sp->s_name[4]++; 2920 if (sp->s_name[4] > 'z') { 2921 error = EINVAL; 2922 goto bad; 2923 } 2924 } 2925 error = nfs_renameit(dvp, cnp, sp); 2926 if (error) 2927 goto bad; 2928 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2929 cnp->cn_td, &np); 2930 np->n_sillyrename = sp; 2931 return (0); 2932 bad: 2933 vrele(sp->s_dvp); 2934 crfree(sp->s_cred); 2935 kfree((caddr_t)sp, M_NFSREQ); 2936 return (error); 2937 } 2938 2939 /* 2940 * Look up a file name and optionally either update the file handle or 2941 * allocate an nfsnode, depending on the value of npp. 2942 * npp == NULL --> just do the lookup 2943 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2944 * handled too 2945 * *npp != NULL --> update the file handle in the vnode 2946 */ 2947 static int 2948 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, 2949 struct thread *td, struct nfsnode **npp) 2950 { 2951 struct vnode *newvp = NULL; 2952 struct nfsnode *np, *dnp = VTONFS(dvp); 2953 int error = 0, fhlen, attrflag; 2954 nfsfh_t *nfhp; 2955 struct nfsm_info info; 2956 2957 info.mrep = NULL; 2958 info.v3 = NFS_ISV3(dvp); 2959 2960 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2961 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 2962 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2963 ERROROUT(nfsm_fhtom(&info, dvp)); 2964 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN)); 2965 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error)); 2966 if (npp && !error) { 2967 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp)); 2968 if (*npp) { 2969 np = *npp; 2970 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2971 kfree((caddr_t)np->n_fhp, M_NFSBIGFH); 2972 np->n_fhp = &np->n_fh; 2973 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2974 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK); 2975 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2976 np->n_fhsize = fhlen; 2977 newvp = NFSTOV(np); 2978 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2979 vref(dvp); 2980 newvp = dvp; 2981 } else { 2982 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2983 if (error) { 2984 m_freem(info.mrep); 2985 info.mrep = NULL; 2986 return (error); 2987 } 2988 newvp = NFSTOV(np); 2989 } 2990 if (info.v3) { 2991 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 2992 NFS_LATTR_NOSHRINK)); 2993 if (!attrflag && *npp == NULL) { 2994 m_freem(info.mrep); 2995 info.mrep = NULL; 2996 if (newvp == dvp) 2997 vrele(newvp); 2998 else 2999 vput(newvp); 3000 return (ENOENT); 3001 } 3002 } else { 3003 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 3004 } 3005 } 3006 m_freem(info.mrep); 3007 info.mrep = NULL; 3008 nfsmout: 3009 if (npp && *npp == NULL) { 3010 if (error) { 3011 if (newvp) { 3012 if (newvp == dvp) 3013 vrele(newvp); 3014 else 3015 vput(newvp); 3016 } 3017 } else 3018 *npp = np; 3019 } 3020 return (error); 3021 } 3022 3023 /* 3024 * Nfs Version 3 commit rpc 3025 * 3026 * We call it 'uio' to distinguish it from 'bio' but there is no real uio 3027 * involved. 3028 */ 3029 int 3030 nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) 3031 { 3032 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3033 int error = 0, wccflag = NFSV3_WCCRATTR; 3034 struct nfsm_info info; 3035 u_int32_t *tl; 3036 3037 info.mrep = NULL; 3038 info.v3 = 1; 3039 3040 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 3041 return (0); 3042 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3043 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1)); 3044 ERROROUT(nfsm_fhtom(&info, vp)); 3045 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED); 3046 txdr_hyper(offset, tl); 3047 tl += 2; 3048 *tl = txdr_unsigned(cnt); 3049 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td, 3050 nfs_vpcred(vp, ND_WRITE), &error)); 3051 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 3052 if (!error) { 3053 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF)); 3054 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 3055 NFSX_V3WRITEVERF)) { 3056 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 3057 NFSX_V3WRITEVERF); 3058 error = NFSERR_STALEWRITEVERF; 3059 } 3060 } 3061 m_freem(info.mrep); 3062 info.mrep = NULL; 3063 nfsmout: 3064 return (error); 3065 } 3066 3067 /* 3068 * Kludge City.. 3069 * - make nfs_bmap() essentially a no-op that does no translation 3070 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3071 * (Maybe I could use the process's page mapping, but I was concerned that 3072 * Kernel Write might not be enabled and also figured copyout() would do 3073 * a lot more work than bcopy() and also it currently happens in the 3074 * context of the swapper process (2). 3075 * 3076 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, 3077 * off_t *a_doffsetp, int *a_runp, int *a_runb) 3078 */ 3079 static int 3080 nfs_bmap(struct vop_bmap_args *ap) 3081 { 3082 /* no token lock required */ 3083 if (ap->a_doffsetp != NULL) 3084 *ap->a_doffsetp = ap->a_loffset; 3085 if (ap->a_runp != NULL) 3086 *ap->a_runp = 0; 3087 if (ap->a_runb != NULL) 3088 *ap->a_runb = 0; 3089 return (0); 3090 } 3091 3092 /* 3093 * Strategy routine. 3094 */ 3095 static int 3096 nfs_strategy(struct vop_strategy_args *ap) 3097 { 3098 struct bio *bio = ap->a_bio; 3099 struct bio *nbio; 3100 struct buf *bp __debugvar = bio->bio_buf; 3101 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3102 struct thread *td; 3103 int error; 3104 3105 KASSERT(bp->b_cmd != BUF_CMD_DONE, 3106 ("nfs_strategy: buffer %p unexpectedly marked done", bp)); 3107 KASSERT(BUF_REFCNT(bp) > 0, 3108 ("nfs_strategy: buffer %p not locked", bp)); 3109 3110 if (bio->bio_flags & BIO_SYNC) 3111 td = curthread; /* XXX */ 3112 else 3113 td = NULL; 3114 3115 lwkt_gettoken(&nmp->nm_token); 3116 3117 /* 3118 * We probably don't need to push an nbio any more since no 3119 * block conversion is required due to the use of 64 bit byte 3120 * offsets, but do it anyway. 3121 * 3122 * NOTE: When NFS callers itself via this strategy routines and 3123 * sets up a synchronous I/O, it expects the I/O to run 3124 * synchronously (its bio_done routine just assumes it), 3125 * so for now we have to honor the bit. 3126 */ 3127 nbio = push_bio(bio); 3128 nbio->bio_offset = bio->bio_offset; 3129 nbio->bio_flags = bio->bio_flags & BIO_SYNC; 3130 3131 /* 3132 * If the op is asynchronous and an i/o daemon is waiting 3133 * queue the request, wake it up and wait for completion 3134 * otherwise just do it ourselves. 3135 */ 3136 if (bio->bio_flags & BIO_SYNC) { 3137 error = nfs_doio(ap->a_vp, nbio, td); 3138 } else { 3139 nfs_asyncio(ap->a_vp, nbio); 3140 error = 0; 3141 } 3142 lwkt_reltoken(&nmp->nm_token); 3143 3144 return (error); 3145 } 3146 3147 /* 3148 * Mmap a file 3149 * 3150 * NB Currently unsupported. 3151 * 3152 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred) 3153 */ 3154 /* ARGSUSED */ 3155 static int 3156 nfs_mmap(struct vop_mmap_args *ap) 3157 { 3158 /* no token lock required */ 3159 return (EINVAL); 3160 } 3161 3162 /* 3163 * fsync vnode op. Just call nfs_flush() with commit == 1. 3164 * 3165 * nfs_fsync(struct vnode *a_vp, int a_waitfor) 3166 */ 3167 /* ARGSUSED */ 3168 static int 3169 nfs_fsync(struct vop_fsync_args *ap) 3170 { 3171 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3172 int error; 3173 3174 lwkt_gettoken(&nmp->nm_token); 3175 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1); 3176 lwkt_reltoken(&nmp->nm_token); 3177 3178 return error; 3179 } 3180 3181 /* 3182 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be 3183 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains 3184 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is 3185 * set the buffer contains data that has already been written to the server 3186 * and which now needs a commit RPC. 3187 * 3188 * If commit is 0 we only take one pass and only flush buffers containing new 3189 * dirty data. 3190 * 3191 * If commit is 1 we take two passes, issuing a commit RPC in the second 3192 * pass. 3193 * 3194 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required 3195 * to completely flush all pending data. 3196 * 3197 * Note that the RB_SCAN code properly handles the case where the 3198 * callback might block and directly or indirectly (another thread) cause 3199 * the RB tree to change. 3200 */ 3201 3202 #ifndef NFS_COMMITBVECSIZ 3203 #define NFS_COMMITBVECSIZ 16 3204 #endif 3205 3206 struct nfs_flush_info { 3207 enum { NFI_FLUSHNEW, NFI_COMMIT } mode; 3208 struct thread *td; 3209 struct vnode *vp; 3210 int waitfor; 3211 int slpflag; 3212 int slptimeo; 3213 int loops; 3214 struct buf *bvary[NFS_COMMITBVECSIZ]; 3215 int bvsize; 3216 off_t beg_off; 3217 off_t end_off; 3218 }; 3219 3220 static int nfs_flush_bp(struct buf *bp, void *data); 3221 static int nfs_flush_docommit(struct nfs_flush_info *info, int error); 3222 3223 int 3224 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) 3225 { 3226 struct nfsnode *np = VTONFS(vp); 3227 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3228 struct nfs_flush_info info; 3229 int error; 3230 3231 bzero(&info, sizeof(info)); 3232 info.td = td; 3233 info.vp = vp; 3234 info.waitfor = waitfor; 3235 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0; 3236 info.loops = 0; 3237 lwkt_gettoken(&vp->v_token); 3238 3239 do { 3240 /* 3241 * Flush mode 3242 */ 3243 info.mode = NFI_FLUSHNEW; 3244 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3245 nfs_flush_bp, &info); 3246 3247 /* 3248 * Take a second pass if committing and no error occured. 3249 * Clean up any left over collection (whether an error 3250 * occurs or not). 3251 */ 3252 if (commit && error == 0) { 3253 info.mode = NFI_COMMIT; 3254 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3255 nfs_flush_bp, &info); 3256 if (info.bvsize) 3257 error = nfs_flush_docommit(&info, error); 3258 } 3259 3260 /* 3261 * Wait for pending I/O to complete before checking whether 3262 * any further dirty buffers exist. 3263 */ 3264 while (waitfor == MNT_WAIT && 3265 bio_track_active(&vp->v_track_write)) { 3266 error = bio_track_wait(&vp->v_track_write, 3267 info.slpflag, info.slptimeo); 3268 if (error) { 3269 /* 3270 * We have to be able to break out if this 3271 * is an 'intr' mount. 3272 */ 3273 if (nfs_sigintr(nmp, NULL, td)) { 3274 error = -EINTR; 3275 break; 3276 } 3277 3278 /* 3279 * Since we do not process pending signals, 3280 * once we get a PCATCH our tsleep() will no 3281 * longer sleep, switch to a fixed timeout 3282 * instead. 3283 */ 3284 if (info.slpflag == PCATCH) { 3285 info.slpflag = 0; 3286 info.slptimeo = 2 * hz; 3287 } 3288 error = 0; 3289 } 3290 } 3291 ++info.loops; 3292 /* 3293 * Loop if we are flushing synchronous as well as committing, 3294 * and dirty buffers are still present. Otherwise we might livelock. 3295 */ 3296 } while (waitfor == MNT_WAIT && commit && 3297 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree)); 3298 3299 /* 3300 * The callbacks have to return a negative error to terminate the 3301 * RB scan. 3302 */ 3303 if (error < 0) 3304 error = -error; 3305 3306 /* 3307 * Deal with any error collection 3308 */ 3309 if (np->n_flag & NWRITEERR) { 3310 error = np->n_error; 3311 np->n_flag &= ~NWRITEERR; 3312 } 3313 lwkt_reltoken(&vp->v_token); 3314 return (error); 3315 } 3316 3317 static 3318 int 3319 nfs_flush_bp(struct buf *bp, void *data) 3320 { 3321 struct nfs_flush_info *info = data; 3322 int lkflags; 3323 int error; 3324 off_t toff; 3325 3326 error = 0; 3327 switch(info->mode) { 3328 case NFI_FLUSHNEW: 3329 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3330 if (error && info->loops && info->waitfor == MNT_WAIT) { 3331 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3332 if (error) { 3333 lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL; 3334 if (info->slpflag & PCATCH) 3335 lkflags |= LK_PCATCH; 3336 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync", 3337 info->slptimeo); 3338 } 3339 } 3340 3341 /* 3342 * Ignore locking errors 3343 */ 3344 if (error) { 3345 error = 0; 3346 break; 3347 } 3348 3349 /* 3350 * The buffer may have changed out from under us, even if 3351 * we did not block (MPSAFE). Check again now that it is 3352 * locked. 3353 */ 3354 if (bp->b_vp == info->vp && 3355 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) { 3356 bremfree(bp); 3357 bawrite(bp); 3358 } else { 3359 BUF_UNLOCK(bp); 3360 } 3361 break; 3362 case NFI_COMMIT: 3363 /* 3364 * Only process buffers in need of a commit which we can 3365 * immediately lock. This may prevent a buffer from being 3366 * committed, but the normal flush loop will block on the 3367 * same buffer so we shouldn't get into an endless loop. 3368 */ 3369 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3370 (B_DELWRI | B_NEEDCOMMIT)) { 3371 break; 3372 } 3373 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 3374 break; 3375 3376 /* 3377 * We must recheck after successfully locking the buffer. 3378 */ 3379 if (bp->b_vp != info->vp || 3380 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3381 (B_DELWRI | B_NEEDCOMMIT)) { 3382 BUF_UNLOCK(bp); 3383 break; 3384 } 3385 3386 /* 3387 * NOTE: storing the bp in the bvary[] basically sets 3388 * it up for a commit operation. 3389 * 3390 * We must call vfs_busy_pages() now so the commit operation 3391 * is interlocked with user modifications to memory mapped 3392 * pages. The b_dirtyoff/b_dirtyend range is not correct 3393 * until after the pages have been busied. 3394 * 3395 * Note: to avoid loopback deadlocks, we do not 3396 * assign b_runningbufspace. 3397 */ 3398 bremfree(bp); 3399 bp->b_cmd = BUF_CMD_WRITE; 3400 vfs_busy_pages(bp->b_vp, bp); 3401 info->bvary[info->bvsize] = bp; 3402 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff; 3403 if (info->bvsize == 0 || toff < info->beg_off) 3404 info->beg_off = toff; 3405 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff); 3406 if (info->bvsize == 0 || toff > info->end_off) 3407 info->end_off = toff; 3408 ++info->bvsize; 3409 if (info->bvsize == NFS_COMMITBVECSIZ) { 3410 error = nfs_flush_docommit(info, 0); 3411 KKASSERT(info->bvsize == 0); 3412 } 3413 } 3414 return (error); 3415 } 3416 3417 static 3418 int 3419 nfs_flush_docommit(struct nfs_flush_info *info, int error) 3420 { 3421 struct vnode *vp; 3422 struct buf *bp; 3423 off_t bytes; 3424 int retv; 3425 int i; 3426 3427 vp = info->vp; 3428 3429 if (info->bvsize > 0) { 3430 /* 3431 * Commit data on the server, as required. Note that 3432 * nfs_commit will use the vnode's cred for the commit. 3433 * The NFSv3 commit RPC is limited to a 32 bit byte count. 3434 */ 3435 bytes = info->end_off - info->beg_off; 3436 if (bytes > 0x40000000) 3437 bytes = 0x40000000; 3438 if (error) { 3439 retv = -error; 3440 } else { 3441 retv = nfs_commitrpc_uio(vp, info->beg_off, 3442 (int)bytes, info->td); 3443 if (retv == NFSERR_STALEWRITEVERF) 3444 nfs_clearcommit(vp->v_mount); 3445 } 3446 3447 /* 3448 * Now, either mark the blocks I/O done or mark the 3449 * blocks dirty, depending on whether the commit 3450 * succeeded. 3451 */ 3452 for (i = 0; i < info->bvsize; ++i) { 3453 bp = info->bvary[i]; 3454 if (retv || (bp->b_flags & B_NEEDCOMMIT) == 0) { 3455 /* 3456 * Either an error or the original 3457 * vfs_busy_pages() cleared B_NEEDCOMMIT 3458 * due to finding new dirty VM pages in 3459 * the buffer. 3460 * 3461 * Leave B_DELWRI intact. 3462 */ 3463 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3464 vfs_unbusy_pages(bp); 3465 bp->b_cmd = BUF_CMD_DONE; 3466 bqrelse(bp); 3467 } else { 3468 /* 3469 * Success, remove B_DELWRI ( bundirty() ). 3470 * 3471 * b_dirtyoff/b_dirtyend seem to be NFS 3472 * specific. We should probably move that 3473 * into bundirty(). XXX 3474 * 3475 * We are faking an I/O write, we have to 3476 * start the transaction in order to 3477 * immediately biodone() it. 3478 */ 3479 bundirty(bp); 3480 bp->b_flags &= ~B_ERROR; 3481 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3482 bp->b_dirtyoff = bp->b_dirtyend = 0; 3483 biodone(&bp->b_bio1); 3484 } 3485 } 3486 info->bvsize = 0; 3487 } 3488 return (error); 3489 } 3490 3491 /* 3492 * NFS advisory byte-level locks. 3493 * Currently unsupported. 3494 * 3495 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, 3496 * int a_flags) 3497 */ 3498 static int 3499 nfs_advlock(struct vop_advlock_args *ap) 3500 { 3501 struct nfsnode *np = VTONFS(ap->a_vp); 3502 3503 /* no token lock currently required */ 3504 /* 3505 * The following kludge is to allow diskless support to work 3506 * until a real NFS lockd is implemented. Basically, just pretend 3507 * that this is a local lock. 3508 */ 3509 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 3510 } 3511 3512 /* 3513 * Print out the contents of an nfsnode. 3514 * 3515 * nfs_print(struct vnode *a_vp) 3516 */ 3517 static int 3518 nfs_print(struct vop_print_args *ap) 3519 { 3520 struct vnode *vp = ap->a_vp; 3521 struct nfsnode *np = VTONFS(vp); 3522 3523 kprintf("tag VT_NFS, fileid %lld fsid 0x%x", 3524 (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid); 3525 if (vp->v_type == VFIFO) 3526 fifo_printinfo(vp); 3527 kprintf("\n"); 3528 return (0); 3529 } 3530 3531 /* 3532 * nfs special file access vnode op. 3533 * 3534 * nfs_laccess(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 3535 */ 3536 static int 3537 nfs_laccess(struct vop_access_args *ap) 3538 { 3539 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3540 struct vattr vattr; 3541 int error; 3542 3543 lwkt_gettoken(&nmp->nm_token); 3544 error = VOP_GETATTR(ap->a_vp, &vattr); 3545 if (error == 0) { 3546 error = vop_helper_access(ap, vattr.va_uid, vattr.va_gid, 3547 vattr.va_mode, 0); 3548 } 3549 lwkt_reltoken(&nmp->nm_token); 3550 3551 return (error); 3552 } 3553 3554 /* 3555 * Read wrapper for fifos. 3556 * 3557 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3558 * struct ucred *a_cred) 3559 */ 3560 static int 3561 nfsfifo_read(struct vop_read_args *ap) 3562 { 3563 struct nfsnode *np = VTONFS(ap->a_vp); 3564 3565 /* no token access required */ 3566 /* 3567 * Set access flag. 3568 */ 3569 np->n_flag |= NACC; 3570 getnanotime(&np->n_atim); 3571 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3572 } 3573 3574 /* 3575 * Write wrapper for fifos. 3576 * 3577 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3578 * struct ucred *a_cred) 3579 */ 3580 static int 3581 nfsfifo_write(struct vop_write_args *ap) 3582 { 3583 struct nfsnode *np = VTONFS(ap->a_vp); 3584 3585 /* no token access required */ 3586 /* 3587 * Set update flag. 3588 */ 3589 np->n_flag |= NUPD; 3590 getnanotime(&np->n_mtim); 3591 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3592 } 3593 3594 /* 3595 * Close wrapper for fifos. 3596 * 3597 * Update the times on the nfsnode then do fifo close. 3598 * 3599 * nfsfifo_close(struct vnode *a_vp, int a_fflag) 3600 */ 3601 static int 3602 nfsfifo_close(struct vop_close_args *ap) 3603 { 3604 struct vnode *vp = ap->a_vp; 3605 struct nfsnode *np = VTONFS(vp); 3606 struct vattr vattr; 3607 struct timespec ts; 3608 3609 /* no token access required */ 3610 3611 if (np->n_flag & (NACC | NUPD)) { 3612 getnanotime(&ts); 3613 if (np->n_flag & NACC) 3614 np->n_atim = ts; 3615 if (np->n_flag & NUPD) 3616 np->n_mtim = ts; 3617 np->n_flag |= NCHG; 3618 if (vp->v_sysref.refcnt == 1 && 3619 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3620 VATTR_NULL(&vattr); 3621 if (np->n_flag & NACC) 3622 vattr.va_atime = np->n_atim; 3623 if (np->n_flag & NUPD) 3624 vattr.va_mtime = np->n_mtim; 3625 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE)); 3626 } 3627 } 3628 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3629 } 3630 3631