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 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.80 2008/10/18 01:13:54 dillon Exp $ 39 */ 40 41 42 /* 43 * vnode op calls for Sun NFS version 2 and 3 44 */ 45 46 #include "opt_inet.h" 47 48 #include <sys/param.h> 49 #include <sys/kernel.h> 50 #include <sys/systm.h> 51 #include <sys/resourcevar.h> 52 #include <sys/proc.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/namei.h> 58 #include <sys/nlookup.h> 59 #include <sys/socket.h> 60 #include <sys/vnode.h> 61 #include <sys/dirent.h> 62 #include <sys/fcntl.h> 63 #include <sys/lockf.h> 64 #include <sys/stat.h> 65 #include <sys/sysctl.h> 66 #include <sys/conf.h> 67 68 #include <vm/vm.h> 69 #include <vm/vm_extern.h> 70 #include <vm/vm_zone.h> 71 72 #include <sys/buf2.h> 73 74 #include <vfs/fifofs/fifo.h> 75 #include <vfs/ufs/dir.h> 76 77 #undef DIRBLKSIZ 78 79 #include "rpcv2.h" 80 #include "nfsproto.h" 81 #include "nfs.h" 82 #include "nfsmount.h" 83 #include "nfsnode.h" 84 #include "xdr_subs.h" 85 #include "nfsm_subs.h" 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 #include <sys/thread2.h> 92 93 /* Defs */ 94 #define TRUE 1 95 #define FALSE 0 96 97 static int nfsfifo_read (struct vop_read_args *); 98 static int nfsfifo_write (struct vop_write_args *); 99 static int nfsfifo_close (struct vop_close_args *); 100 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *); 101 static int nfs_lookup (struct vop_old_lookup_args *); 102 static int nfs_create (struct vop_old_create_args *); 103 static int nfs_mknod (struct vop_old_mknod_args *); 104 static int nfs_open (struct vop_open_args *); 105 static int nfs_close (struct vop_close_args *); 106 static int nfs_access (struct vop_access_args *); 107 static int nfs_getattr (struct vop_getattr_args *); 108 static int nfs_setattr (struct vop_setattr_args *); 109 static int nfs_read (struct vop_read_args *); 110 static int nfs_mmap (struct vop_mmap_args *); 111 static int nfs_fsync (struct vop_fsync_args *); 112 static int nfs_remove (struct vop_old_remove_args *); 113 static int nfs_link (struct vop_old_link_args *); 114 static int nfs_rename (struct vop_old_rename_args *); 115 static int nfs_mkdir (struct vop_old_mkdir_args *); 116 static int nfs_rmdir (struct vop_old_rmdir_args *); 117 static int nfs_symlink (struct vop_old_symlink_args *); 118 static int nfs_readdir (struct vop_readdir_args *); 119 static int nfs_bmap (struct vop_bmap_args *); 120 static int nfs_strategy (struct vop_strategy_args *); 121 static int nfs_lookitup (struct vnode *, const char *, int, 122 struct ucred *, struct thread *, struct nfsnode **); 123 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *); 124 static int nfs_laccess (struct vop_access_args *); 125 static int nfs_readlink (struct vop_readlink_args *); 126 static int nfs_print (struct vop_print_args *); 127 static int nfs_advlock (struct vop_advlock_args *); 128 129 static int nfs_nresolve (struct vop_nresolve_args *); 130 /* 131 * Global vfs data structures for nfs 132 */ 133 struct vop_ops nfsv2_vnode_vops = { 134 .vop_default = vop_defaultop, 135 .vop_access = nfs_access, 136 .vop_advlock = nfs_advlock, 137 .vop_bmap = nfs_bmap, 138 .vop_close = nfs_close, 139 .vop_old_create = nfs_create, 140 .vop_fsync = nfs_fsync, 141 .vop_getattr = nfs_getattr, 142 .vop_getpages = vop_stdgetpages, 143 .vop_putpages = vop_stdputpages, 144 .vop_inactive = nfs_inactive, 145 .vop_old_link = nfs_link, 146 .vop_old_lookup = nfs_lookup, 147 .vop_old_mkdir = nfs_mkdir, 148 .vop_old_mknod = nfs_mknod, 149 .vop_mmap = nfs_mmap, 150 .vop_open = nfs_open, 151 .vop_print = nfs_print, 152 .vop_read = nfs_read, 153 .vop_readdir = nfs_readdir, 154 .vop_readlink = nfs_readlink, 155 .vop_reclaim = nfs_reclaim, 156 .vop_old_remove = nfs_remove, 157 .vop_old_rename = nfs_rename, 158 .vop_old_rmdir = nfs_rmdir, 159 .vop_setattr = nfs_setattr, 160 .vop_strategy = nfs_strategy, 161 .vop_old_symlink = nfs_symlink, 162 .vop_write = nfs_write, 163 .vop_nresolve = nfs_nresolve 164 }; 165 166 /* 167 * Special device vnode ops 168 */ 169 struct vop_ops nfsv2_spec_vops = { 170 .vop_default = vop_defaultop, 171 .vop_access = nfs_laccess, 172 .vop_close = nfs_close, 173 .vop_fsync = nfs_fsync, 174 .vop_getattr = nfs_getattr, 175 .vop_inactive = nfs_inactive, 176 .vop_print = nfs_print, 177 .vop_read = vop_stdnoread, 178 .vop_reclaim = nfs_reclaim, 179 .vop_setattr = nfs_setattr, 180 .vop_write = vop_stdnowrite 181 }; 182 183 struct vop_ops nfsv2_fifo_vops = { 184 .vop_default = fifo_vnoperate, 185 .vop_access = nfs_laccess, 186 .vop_close = nfsfifo_close, 187 .vop_fsync = nfs_fsync, 188 .vop_getattr = nfs_getattr, 189 .vop_inactive = nfs_inactive, 190 .vop_print = nfs_print, 191 .vop_read = nfsfifo_read, 192 .vop_reclaim = nfs_reclaim, 193 .vop_setattr = nfs_setattr, 194 .vop_write = nfsfifo_write 195 }; 196 197 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp, 198 struct componentname *cnp, 199 struct vattr *vap); 200 static int nfs_removerpc (struct vnode *dvp, const char *name, 201 int namelen, 202 struct ucred *cred, struct thread *td); 203 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr, 204 int fnamelen, struct vnode *tdvp, 205 const char *tnameptr, int tnamelen, 206 struct ucred *cred, struct thread *td); 207 static int nfs_renameit (struct vnode *sdvp, 208 struct componentname *scnp, 209 struct sillyrename *sp); 210 211 SYSCTL_DECL(_vfs_nfs); 212 213 static int nfs_flush_on_rename = 1; 214 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW, 215 &nfs_flush_on_rename, 0, "flush fvp prior to rename"); 216 static int nfs_flush_on_hlink = 0; 217 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW, 218 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link"); 219 220 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO; 221 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 222 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 223 224 static int nfsneg_cache_timeout = NFS_MINATTRTIMO; 225 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW, 226 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout"); 227 228 static int nfspos_cache_timeout = NFS_MINATTRTIMO; 229 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW, 230 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout"); 231 232 static int nfsv3_commit_on_close = 0; 233 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, 234 &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); 235 #if 0 236 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, 237 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); 238 239 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, 240 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); 241 #endif 242 243 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ 244 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ 245 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP) 246 247 /* 248 * Returns whether a name component is a degenerate '.' or '..'. 249 */ 250 static __inline 251 int 252 nlcdegenerate(struct nlcomponent *nlc) 253 { 254 if (nlc->nlc_namelen == 1 && nlc->nlc_nameptr[0] == '.') 255 return(1); 256 if (nlc->nlc_namelen == 2 && 257 nlc->nlc_nameptr[0] == '.' && nlc->nlc_nameptr[1] == '.') 258 return(1); 259 return(0); 260 } 261 262 static int 263 nfs3_access_otw(struct vnode *vp, int wmode, 264 struct thread *td, struct ucred *cred) 265 { 266 struct nfsnode *np = VTONFS(vp); 267 int attrflag; 268 int error = 0; 269 u_int32_t *tl; 270 u_int32_t rmode; 271 struct nfsm_info info; 272 273 info.mrep = NULL; 274 info.v3 = 1; 275 276 nfsstats.rpccnt[NFSPROC_ACCESS]++; 277 nfsm_reqhead(&info, vp, NFSPROC_ACCESS, 278 NFSX_FH(info.v3) + NFSX_UNSIGNED); 279 ERROROUT(nfsm_fhtom(&info, vp)); 280 tl = nfsm_build(&info, NFSX_UNSIGNED); 281 *tl = txdr_unsigned(wmode); 282 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error)); 283 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK)); 284 if (error == 0) { 285 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 286 rmode = fxdr_unsigned(u_int32_t, *tl); 287 np->n_mode = rmode; 288 np->n_modeuid = cred->cr_uid; 289 np->n_modestamp = mycpu->gd_time_seconds; 290 } 291 m_freem(info.mrep); 292 info.mrep = NULL; 293 nfsmout: 294 return error; 295 } 296 297 /* 298 * nfs access vnode op. 299 * For nfs version 2, just return ok. File accesses may fail later. 300 * For nfs version 3, use the access rpc to check accessibility. If file modes 301 * are changed on the server, accesses might still fail later. 302 * 303 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 304 */ 305 static int 306 nfs_access(struct vop_access_args *ap) 307 { 308 struct ucred *cred; 309 struct vnode *vp = ap->a_vp; 310 thread_t td = curthread; 311 int error = 0; 312 u_int32_t mode, wmode; 313 struct nfsnode *np = VTONFS(vp); 314 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 315 int v3 = NFS_ISV3(vp); 316 317 lwkt_gettoken(&nmp->nm_token); 318 319 /* 320 * Disallow write attempts on filesystems mounted read-only; 321 * unless the file is a socket, fifo, or a block or character 322 * device resident on the filesystem. 323 */ 324 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 325 switch (vp->v_type) { 326 case VREG: 327 case VDIR: 328 case VLNK: 329 lwkt_reltoken(&nmp->nm_token); 330 return (EROFS); 331 default: 332 break; 333 } 334 } 335 336 /* 337 * The NFS protocol passes only the effective uid/gid over the wire but 338 * we need to check access against real ids if AT_EACCESS not set. 339 * Handle this case by cloning the credentials and setting the 340 * effective ids to the real ones. 341 */ 342 if (ap->a_flags & AT_EACCESS) { 343 cred = crhold(ap->a_cred); 344 } else { 345 cred = crdup(ap->a_cred); 346 cred->cr_uid = cred->cr_ruid; 347 cred->cr_gid = cred->cr_rgid; 348 } 349 350 /* 351 * For nfs v3, check to see if we have done this recently, and if 352 * so return our cached result instead of making an ACCESS call. 353 * If not, do an access rpc, otherwise you are stuck emulating 354 * ufs_access() locally using the vattr. This may not be correct, 355 * since the server may apply other access criteria such as 356 * client uid-->server uid mapping that we do not know about. 357 */ 358 if (v3) { 359 if (ap->a_mode & VREAD) 360 mode = NFSV3ACCESS_READ; 361 else 362 mode = 0; 363 if (vp->v_type != VDIR) { 364 if (ap->a_mode & VWRITE) 365 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 366 if (ap->a_mode & VEXEC) 367 mode |= NFSV3ACCESS_EXECUTE; 368 } else { 369 if (ap->a_mode & VWRITE) 370 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 371 NFSV3ACCESS_DELETE); 372 if (ap->a_mode & VEXEC) 373 mode |= NFSV3ACCESS_LOOKUP; 374 } 375 /* XXX safety belt, only make blanket request if caching */ 376 if (nfsaccess_cache_timeout > 0) { 377 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | 378 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | 379 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; 380 } else { 381 wmode = mode; 382 } 383 384 /* 385 * Does our cached result allow us to give a definite yes to 386 * this request? 387 */ 388 if (np->n_modestamp && 389 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) && 390 (cred->cr_uid == np->n_modeuid) && 391 ((np->n_mode & mode) == mode)) { 392 nfsstats.accesscache_hits++; 393 } else { 394 /* 395 * Either a no, or a don't know. Go to the wire. 396 */ 397 nfsstats.accesscache_misses++; 398 error = nfs3_access_otw(vp, wmode, td, cred); 399 if (!error) { 400 if ((np->n_mode & mode) != mode) { 401 error = EACCES; 402 } 403 } 404 } 405 } else { 406 if ((error = nfs_laccess(ap)) != 0) { 407 crfree(cred); 408 lwkt_reltoken(&nmp->nm_token); 409 return (error); 410 } 411 412 /* 413 * Attempt to prevent a mapped root from accessing a file 414 * which it shouldn't. We try to read a byte from the file 415 * if the user is root and the file is not zero length. 416 * After calling nfs_laccess, we should have the correct 417 * file size cached. 418 */ 419 if (cred->cr_uid == 0 && (ap->a_mode & VREAD) 420 && VTONFS(vp)->n_size > 0) { 421 struct iovec aiov; 422 struct uio auio; 423 char buf[1]; 424 425 aiov.iov_base = buf; 426 aiov.iov_len = 1; 427 auio.uio_iov = &aiov; 428 auio.uio_iovcnt = 1; 429 auio.uio_offset = 0; 430 auio.uio_resid = 1; 431 auio.uio_segflg = UIO_SYSSPACE; 432 auio.uio_rw = UIO_READ; 433 auio.uio_td = td; 434 435 if (vp->v_type == VREG) { 436 error = nfs_readrpc_uio(vp, &auio); 437 } else if (vp->v_type == VDIR) { 438 char* bp; 439 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 440 aiov.iov_base = bp; 441 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 442 error = nfs_readdirrpc_uio(vp, &auio); 443 kfree(bp, M_TEMP); 444 } else if (vp->v_type == VLNK) { 445 error = nfs_readlinkrpc_uio(vp, &auio); 446 } else { 447 error = EACCES; 448 } 449 } 450 } 451 /* 452 * [re]record creds for reading and/or writing if access 453 * was granted. Assume the NFS server will grant read access 454 * for execute requests. 455 */ 456 if (error == 0) { 457 if ((ap->a_mode & (VREAD|VEXEC)) && cred != np->n_rucred) { 458 crhold(cred); 459 if (np->n_rucred) 460 crfree(np->n_rucred); 461 np->n_rucred = cred; 462 } 463 if ((ap->a_mode & VWRITE) && cred != np->n_wucred) { 464 crhold(cred); 465 if (np->n_wucred) 466 crfree(np->n_wucred); 467 np->n_wucred = cred; 468 } 469 } 470 lwkt_reltoken(&nmp->nm_token); 471 crfree(cred); 472 return(error); 473 } 474 475 /* 476 * nfs open vnode op 477 * Check to see if the type is ok 478 * and that deletion is not in progress. 479 * For paged in text files, you will need to flush the page cache 480 * if consistency is lost. 481 * 482 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 483 * struct file *a_fp) 484 */ 485 /* ARGSUSED */ 486 static int 487 nfs_open(struct vop_open_args *ap) 488 { 489 struct vnode *vp = ap->a_vp; 490 struct nfsnode *np = VTONFS(vp); 491 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 492 struct vattr vattr; 493 int error; 494 495 lwkt_gettoken(&nmp->nm_token); 496 497 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 498 #ifdef DIAGNOSTIC 499 kprintf("open eacces vtyp=%d\n",vp->v_type); 500 #endif 501 lwkt_reltoken(&nmp->nm_token); 502 return (EOPNOTSUPP); 503 } 504 505 /* 506 * Save valid creds for reading and writing for later RPCs. 507 */ 508 if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) { 509 crhold(ap->a_cred); 510 if (np->n_rucred) 511 crfree(np->n_rucred); 512 np->n_rucred = ap->a_cred; 513 } 514 if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) { 515 crhold(ap->a_cred); 516 if (np->n_wucred) 517 crfree(np->n_wucred); 518 np->n_wucred = ap->a_cred; 519 } 520 521 /* 522 * Clear the attribute cache only if opening with write access. It 523 * is unclear if we should do this at all here, but we certainly 524 * should not clear the cache unconditionally simply because a file 525 * is being opened. 526 */ 527 if (ap->a_mode & FWRITE) 528 np->n_attrstamp = 0; 529 530 /* 531 * For normal NFS, reconcile changes made locally verses 532 * changes made remotely. Note that VOP_GETATTR only goes 533 * to the wire if the cached attribute has timed out or been 534 * cleared. 535 * 536 * If local modifications have been made clear the attribute 537 * cache to force an attribute and modified time check. If 538 * GETATTR detects that the file has been changed by someone 539 * other then us it will set NRMODIFIED. 540 * 541 * If we are opening a directory and local changes have been 542 * made we have to invalidate the cache in order to ensure 543 * that we get the most up-to-date information from the 544 * server. XXX 545 */ 546 if (np->n_flag & NLMODIFIED) { 547 np->n_attrstamp = 0; 548 if (vp->v_type == VDIR) { 549 error = nfs_vinvalbuf(vp, V_SAVE, 1); 550 if (error == EINTR) 551 return (error); 552 nfs_invaldir(vp); 553 } 554 } 555 error = VOP_GETATTR(vp, &vattr); 556 if (error) { 557 lwkt_reltoken(&nmp->nm_token); 558 return (error); 559 } 560 if (np->n_flag & NRMODIFIED) { 561 if (vp->v_type == VDIR) 562 nfs_invaldir(vp); 563 error = nfs_vinvalbuf(vp, V_SAVE, 1); 564 if (error == EINTR) { 565 lwkt_reltoken(&nmp->nm_token); 566 return (error); 567 } 568 np->n_flag &= ~NRMODIFIED; 569 } 570 error = vop_stdopen(ap); 571 lwkt_reltoken(&nmp->nm_token); 572 573 return error; 574 } 575 576 /* 577 * nfs close vnode op 578 * What an NFS client should do upon close after writing is a debatable issue. 579 * Most NFS clients push delayed writes to the server upon close, basically for 580 * two reasons: 581 * 1 - So that any write errors may be reported back to the client process 582 * doing the close system call. By far the two most likely errors are 583 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 584 * 2 - To put a worst case upper bound on cache inconsistency between 585 * multiple clients for the file. 586 * There is also a consistency problem for Version 2 of the protocol w.r.t. 587 * not being able to tell if other clients are writing a file concurrently, 588 * since there is no way of knowing if the changed modify time in the reply 589 * is only due to the write for this client. 590 * (NFS Version 3 provides weak cache consistency data in the reply that 591 * should be sufficient to detect and handle this case.) 592 * 593 * The current code does the following: 594 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 595 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 596 * or commit them (this satisfies 1 and 2 except for the 597 * case where the server crashes after this close but 598 * before the commit RPC, which is felt to be "good 599 * enough". Changing the last argument to nfs_flush() to 600 * a 1 would force a commit operation, if it is felt a 601 * commit is necessary now. 602 * for NQNFS - do nothing now, since 2 is dealt with via leases and 603 * 1 should be dealt with via an fsync() system call for 604 * cases where write errors are important. 605 * 606 * nfs_close(struct vnode *a_vp, int a_fflag) 607 */ 608 /* ARGSUSED */ 609 static int 610 nfs_close(struct vop_close_args *ap) 611 { 612 struct vnode *vp = ap->a_vp; 613 struct nfsnode *np = VTONFS(vp); 614 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 615 int error = 0; 616 thread_t td = curthread; 617 618 lwkt_gettoken(&nmp->nm_token); 619 620 if (vp->v_type == VREG) { 621 if (np->n_flag & NLMODIFIED) { 622 if (NFS_ISV3(vp)) { 623 /* 624 * Under NFSv3 we have dirty buffers to dispose of. We 625 * must flush them to the NFS server. We have the option 626 * of waiting all the way through the commit rpc or just 627 * waiting for the initial write. The default is to only 628 * wait through the initial write so the data is in the 629 * server's cache, which is roughly similar to the state 630 * a standard disk subsystem leaves the file in on close(). 631 * 632 * We cannot clear the NLMODIFIED bit in np->n_flag due to 633 * potential races with other processes, and certainly 634 * cannot clear it if we don't commit. 635 */ 636 int cm = nfsv3_commit_on_close ? 1 : 0; 637 error = nfs_flush(vp, MNT_WAIT, td, cm); 638 /* np->n_flag &= ~NLMODIFIED; */ 639 } else { 640 error = nfs_vinvalbuf(vp, V_SAVE, 1); 641 } 642 np->n_attrstamp = 0; 643 } 644 if (np->n_flag & NWRITEERR) { 645 np->n_flag &= ~NWRITEERR; 646 error = np->n_error; 647 } 648 } 649 vop_stdclose(ap); 650 lwkt_reltoken(&nmp->nm_token); 651 652 return (error); 653 } 654 655 /* 656 * nfs getattr call from vfs. 657 * 658 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 659 */ 660 static int 661 nfs_getattr(struct vop_getattr_args *ap) 662 { 663 struct vnode *vp = ap->a_vp; 664 struct nfsnode *np = VTONFS(vp); 665 struct nfsmount *nmp; 666 int error = 0; 667 thread_t td = curthread; 668 struct nfsm_info info; 669 670 info.mrep = NULL; 671 info.v3 = NFS_ISV3(vp); 672 nmp = VFSTONFS(vp->v_mount); 673 674 lwkt_gettoken(&nmp->nm_token); 675 676 /* 677 * Update local times for special files. 678 */ 679 if (np->n_flag & (NACC | NUPD)) 680 np->n_flag |= NCHG; 681 /* 682 * First look in the cache. 683 */ 684 if (nfs_getattrcache(vp, ap->a_vap) == 0) 685 goto done; 686 687 if (info.v3 && nfsaccess_cache_timeout > 0) { 688 nfsstats.accesscache_misses++; 689 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK)); 690 if (nfs_getattrcache(vp, ap->a_vap) == 0) 691 goto done; 692 } 693 694 nfsstats.rpccnt[NFSPROC_GETATTR]++; 695 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3)); 696 ERROROUT(nfsm_fhtom(&info, vp)); 697 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td, 698 nfs_vpcred(vp, ND_CHECK), &error)); 699 if (error == 0) { 700 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap)); 701 } 702 m_freem(info.mrep); 703 info.mrep = NULL; 704 done: 705 /* 706 * NFS doesn't support chflags flags. If the nfs mount was 707 * made -o cache set the UF_CACHE bit for swapcache. 708 */ 709 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT)) 710 ap->a_vap->va_flags |= UF_CACHE; 711 nfsmout: 712 lwkt_reltoken(&nmp->nm_token); 713 return (error); 714 } 715 716 /* 717 * nfs setattr call. 718 * 719 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred) 720 */ 721 static int 722 nfs_setattr(struct vop_setattr_args *ap) 723 { 724 struct vnode *vp = ap->a_vp; 725 struct nfsnode *np = VTONFS(vp); 726 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 727 struct vattr *vap = ap->a_vap; 728 int biosize = vp->v_mount->mnt_stat.f_iosize; 729 int error = 0; 730 int boff; 731 off_t tsize; 732 thread_t td = curthread; 733 734 #ifndef nolint 735 tsize = (off_t)0; 736 #endif 737 /* 738 * Setting of flags is not supported. 739 */ 740 if (vap->va_flags != VNOVAL) 741 return (EOPNOTSUPP); 742 743 /* 744 * Disallow write attempts if the filesystem is mounted read-only. 745 */ 746 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 747 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 748 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 749 (vp->v_mount->mnt_flag & MNT_RDONLY)) 750 return (EROFS); 751 752 lwkt_gettoken(&nmp->nm_token); 753 754 if (vap->va_size != VNOVAL) { 755 /* 756 * truncation requested 757 */ 758 switch (vp->v_type) { 759 case VDIR: 760 lwkt_reltoken(&nmp->nm_token); 761 return (EISDIR); 762 case VCHR: 763 case VBLK: 764 case VSOCK: 765 case VFIFO: 766 if (vap->va_mtime.tv_sec == VNOVAL && 767 vap->va_atime.tv_sec == VNOVAL && 768 vap->va_mode == (mode_t)VNOVAL && 769 vap->va_uid == (uid_t)VNOVAL && 770 vap->va_gid == (gid_t)VNOVAL) { 771 lwkt_reltoken(&nmp->nm_token); 772 return (0); 773 } 774 vap->va_size = VNOVAL; 775 break; 776 default: 777 /* 778 * Disallow write attempts if the filesystem is 779 * mounted read-only. 780 */ 781 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 782 lwkt_reltoken(&nmp->nm_token); 783 return (EROFS); 784 } 785 786 tsize = np->n_size; 787 again: 788 boff = (int)vap->va_size & (biosize - 1); 789 error = nfs_meta_setsize(vp, td, vap->va_size, 0); 790 791 #if 0 792 if (np->n_flag & NLMODIFIED) { 793 if (vap->va_size == 0) 794 error = nfs_vinvalbuf(vp, 0, 1); 795 else 796 error = nfs_vinvalbuf(vp, V_SAVE, 1); 797 } 798 #endif 799 /* 800 * note: this loop case almost always happens at 801 * least once per truncation. 802 */ 803 if (error == 0 && np->n_size != vap->va_size) 804 goto again; 805 np->n_vattr.va_size = vap->va_size; 806 break; 807 } 808 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) { 809 /* 810 * What to do. If we are modifying the mtime we lose 811 * mtime detection of changes made by the server or other 812 * clients. But programs like rsync/rdist/cpdup are going 813 * to call utimes a lot. We don't want to piecemeal sync. 814 * 815 * For now sync if any prior remote changes were detected, 816 * but allow us to lose track of remote changes made during 817 * the utimes operation. 818 */ 819 if (np->n_flag & NRMODIFIED) 820 error = nfs_vinvalbuf(vp, V_SAVE, 1); 821 if (error == EINTR) 822 return (error); 823 if (error == 0) { 824 if (vap->va_mtime.tv_sec != VNOVAL) { 825 np->n_mtime = vap->va_mtime.tv_sec; 826 } 827 } 828 } 829 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 830 831 /* 832 * Sanity check if a truncation was issued. This should only occur 833 * if multiple processes are racing on the same file. 834 */ 835 if (error == 0 && vap->va_size != VNOVAL && 836 np->n_size != vap->va_size) { 837 kprintf("NFS ftruncate: server disagrees on the file size: " 838 "%jd/%jd/%jd\n", 839 (intmax_t)tsize, 840 (intmax_t)vap->va_size, 841 (intmax_t)np->n_size); 842 goto again; 843 } 844 if (error && vap->va_size != VNOVAL) { 845 np->n_size = np->n_vattr.va_size = tsize; 846 nfs_meta_setsize(vp, td, np->n_size, 0); 847 } 848 lwkt_reltoken(&nmp->nm_token); 849 850 return (error); 851 } 852 853 /* 854 * Do an nfs setattr rpc. 855 */ 856 static int 857 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, 858 struct ucred *cred, struct thread *td) 859 { 860 struct nfsv2_sattr *sp; 861 struct nfsnode *np = VTONFS(vp); 862 u_int32_t *tl; 863 int error = 0, wccflag = NFSV3_WCCRATTR; 864 struct nfsm_info info; 865 866 info.mrep = NULL; 867 info.v3 = NFS_ISV3(vp); 868 869 nfsstats.rpccnt[NFSPROC_SETATTR]++; 870 nfsm_reqhead(&info, vp, NFSPROC_SETATTR, 871 NFSX_FH(info.v3) + NFSX_SATTR(info.v3)); 872 ERROROUT(nfsm_fhtom(&info, vp)); 873 if (info.v3) { 874 nfsm_v3attrbuild(&info, vap, TRUE); 875 tl = nfsm_build(&info, NFSX_UNSIGNED); 876 *tl = nfs_false; 877 } else { 878 sp = nfsm_build(&info, NFSX_V2SATTR); 879 if (vap->va_mode == (mode_t)VNOVAL) 880 sp->sa_mode = nfs_xdrneg1; 881 else 882 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 883 if (vap->va_uid == (uid_t)VNOVAL) 884 sp->sa_uid = nfs_xdrneg1; 885 else 886 sp->sa_uid = txdr_unsigned(vap->va_uid); 887 if (vap->va_gid == (gid_t)VNOVAL) 888 sp->sa_gid = nfs_xdrneg1; 889 else 890 sp->sa_gid = txdr_unsigned(vap->va_gid); 891 sp->sa_size = txdr_unsigned(vap->va_size); 892 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 893 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 894 } 895 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error)); 896 if (info.v3) { 897 np->n_modestamp = 0; 898 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 899 } else { 900 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 901 } 902 m_freem(info.mrep); 903 info.mrep = NULL; 904 nfsmout: 905 return (error); 906 } 907 908 static 909 void 910 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout) 911 { 912 if (nctimeout == 0) 913 nctimeout = 1; 914 else 915 nctimeout *= hz; 916 cache_setvp(nch, vp); 917 cache_settimeout(nch, nctimeout); 918 } 919 920 /* 921 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove 922 * nfs_lookup() until all remaining new api calls are implemented. 923 * 924 * Resolve a namecache entry. This function is passed a locked ncp and 925 * must call nfs_cache_setvp() on it as appropriate to resolve the entry. 926 */ 927 static int 928 nfs_nresolve(struct vop_nresolve_args *ap) 929 { 930 struct thread *td = curthread; 931 struct namecache *ncp; 932 struct nfsmount *nmp; 933 struct ucred *cred; 934 struct nfsnode *np; 935 struct vnode *dvp; 936 struct vnode *nvp; 937 nfsfh_t *fhp; 938 int attrflag; 939 int fhsize; 940 int error; 941 int tmp_error; 942 int len; 943 struct nfsm_info info; 944 945 cred = ap->a_cred; 946 dvp = ap->a_dvp; 947 nmp = VFSTONFS(dvp->v_mount); 948 949 lwkt_gettoken(&nmp->nm_token); 950 951 if ((error = vget(dvp, LK_SHARED)) != 0) { 952 lwkt_reltoken(&nmp->nm_token); 953 return (error); 954 } 955 956 info.mrep = NULL; 957 info.v3 = NFS_ISV3(dvp); 958 959 nvp = NULL; 960 nfsstats.lookupcache_misses++; 961 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 962 ncp = ap->a_nch->ncp; 963 len = ncp->nc_nlen; 964 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 965 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 966 ERROROUT(nfsm_fhtom(&info, dvp)); 967 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN)); 968 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, 969 ap->a_cred, &error)); 970 if (error) { 971 /* 972 * Cache negatve lookups to reduce NFS traffic, but use 973 * a fast timeout. Otherwise use a timeout of 1 tick. 974 * XXX we should add a namecache flag for no-caching 975 * to uncache the negative hit as soon as possible, but 976 * we cannot simply destroy the entry because it is used 977 * as a placeholder by the caller. 978 * 979 * The refactored nfs code will overwrite a non-zero error 980 * with 0 when we use ERROROUT(), so don't here. 981 */ 982 if (error == ENOENT) 983 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout); 984 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 985 NFS_LATTR_NOSHRINK); 986 if (tmp_error) { 987 error = tmp_error; 988 goto nfsmout; 989 } 990 m_freem(info.mrep); 991 info.mrep = NULL; 992 goto nfsmout; 993 } 994 995 /* 996 * Success, get the file handle, do various checks, and load 997 * post-operation data from the reply packet. Theoretically 998 * we should never be looking up "." so, theoretically, we 999 * should never get the same file handle as our directory. But 1000 * we check anyway. XXX 1001 * 1002 * Note that no timeout is set for the positive cache hit. We 1003 * assume, theoretically, that ESTALE returns will be dealt with 1004 * properly to handle NFS races and in anycase we cannot depend 1005 * on a timeout to deal with NFS open/create/excl issues so instead 1006 * of a bad hack here the rest of the NFS client code needs to do 1007 * the right thing. 1008 */ 1009 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1010 1011 np = VTONFS(dvp); 1012 if (NFS_CMPFH(np, fhp, fhsize)) { 1013 vref(dvp); 1014 nvp = dvp; 1015 } else { 1016 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1017 if (error) { 1018 m_freem(info.mrep); 1019 info.mrep = NULL; 1020 vput(dvp); 1021 lwkt_reltoken(&nmp->nm_token); 1022 return (error); 1023 } 1024 nvp = NFSTOV(np); 1025 } 1026 if (info.v3) { 1027 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag, 1028 NFS_LATTR_NOSHRINK)); 1029 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1030 NFS_LATTR_NOSHRINK)); 1031 } else { 1032 ERROROUT(nfsm_loadattr(&info, nvp, NULL)); 1033 } 1034 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout); 1035 m_freem(info.mrep); 1036 info.mrep = NULL; 1037 nfsmout: 1038 lwkt_reltoken(&nmp->nm_token); 1039 vput(dvp); 1040 if (nvp) { 1041 if (nvp == dvp) 1042 vrele(nvp); 1043 else 1044 vput(nvp); 1045 } 1046 return (error); 1047 } 1048 1049 /* 1050 * 'cached' nfs directory lookup 1051 * 1052 * NOTE: cannot be removed until NFS implements all the new n*() API calls. 1053 * 1054 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 1055 * struct componentname *a_cnp) 1056 */ 1057 static int 1058 nfs_lookup(struct vop_old_lookup_args *ap) 1059 { 1060 struct componentname *cnp = ap->a_cnp; 1061 struct vnode *dvp = ap->a_dvp; 1062 struct vnode **vpp = ap->a_vpp; 1063 int flags = cnp->cn_flags; 1064 struct vnode *newvp; 1065 struct nfsmount *nmp; 1066 long len; 1067 nfsfh_t *fhp; 1068 struct nfsnode *np; 1069 int lockparent, wantparent, attrflag, fhsize; 1070 int error; 1071 int tmp_error; 1072 struct nfsm_info info; 1073 1074 info.mrep = NULL; 1075 info.v3 = NFS_ISV3(dvp); 1076 error = 0; 1077 1078 /* 1079 * Read-only mount check and directory check. 1080 */ 1081 *vpp = NULLVP; 1082 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) && 1083 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) 1084 return (EROFS); 1085 1086 if (dvp->v_type != VDIR) 1087 return (ENOTDIR); 1088 1089 /* 1090 * Look it up in the cache. Note that ENOENT is only returned if we 1091 * previously entered a negative hit (see later on). The additional 1092 * nfsneg_cache_timeout check causes previously cached results to 1093 * be instantly ignored if the negative caching is turned off. 1094 */ 1095 lockparent = flags & CNP_LOCKPARENT; 1096 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); 1097 nmp = VFSTONFS(dvp->v_mount); 1098 np = VTONFS(dvp); 1099 1100 lwkt_gettoken(&nmp->nm_token); 1101 1102 /* 1103 * Go to the wire. 1104 */ 1105 error = 0; 1106 newvp = NULLVP; 1107 nfsstats.lookupcache_misses++; 1108 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1109 len = cnp->cn_namelen; 1110 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 1111 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 1112 ERROROUT(nfsm_fhtom(&info, dvp)); 1113 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 1114 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td, 1115 cnp->cn_cred, &error)); 1116 if (error) { 1117 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 1118 NFS_LATTR_NOSHRINK); 1119 if (tmp_error) { 1120 error = tmp_error; 1121 goto nfsmout; 1122 } 1123 1124 m_freem(info.mrep); 1125 info.mrep = NULL; 1126 goto nfsmout; 1127 } 1128 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1129 1130 /* 1131 * Handle RENAME case... 1132 */ 1133 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) { 1134 if (NFS_CMPFH(np, fhp, fhsize)) { 1135 m_freem(info.mrep); 1136 info.mrep = NULL; 1137 lwkt_reltoken(&nmp->nm_token); 1138 return (EISDIR); 1139 } 1140 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1141 if (error) { 1142 m_freem(info.mrep); 1143 info.mrep = NULL; 1144 lwkt_reltoken(&nmp->nm_token); 1145 return (error); 1146 } 1147 newvp = NFSTOV(np); 1148 if (info.v3) { 1149 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1150 NFS_LATTR_NOSHRINK)); 1151 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1152 NFS_LATTR_NOSHRINK)); 1153 } else { 1154 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1155 } 1156 *vpp = newvp; 1157 m_freem(info.mrep); 1158 info.mrep = NULL; 1159 if (!lockparent) { 1160 vn_unlock(dvp); 1161 cnp->cn_flags |= CNP_PDIRUNLOCK; 1162 } 1163 lwkt_reltoken(&nmp->nm_token); 1164 return (0); 1165 } 1166 1167 if (flags & CNP_ISDOTDOT) { 1168 vn_unlock(dvp); 1169 cnp->cn_flags |= CNP_PDIRUNLOCK; 1170 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1171 if (error) { 1172 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1173 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 1174 lwkt_reltoken(&nmp->nm_token); 1175 return (error); /* NOTE: return error from nget */ 1176 } 1177 newvp = NFSTOV(np); 1178 if (lockparent) { 1179 error = vn_lock(dvp, LK_EXCLUSIVE); 1180 if (error) { 1181 vput(newvp); 1182 lwkt_reltoken(&nmp->nm_token); 1183 return (error); 1184 } 1185 cnp->cn_flags |= CNP_PDIRUNLOCK; 1186 } 1187 } else if (NFS_CMPFH(np, fhp, fhsize)) { 1188 vref(dvp); 1189 newvp = dvp; 1190 } else { 1191 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1192 if (error) { 1193 m_freem(info.mrep); 1194 info.mrep = NULL; 1195 lwkt_reltoken(&nmp->nm_token); 1196 return (error); 1197 } 1198 if (!lockparent) { 1199 vn_unlock(dvp); 1200 cnp->cn_flags |= CNP_PDIRUNLOCK; 1201 } 1202 newvp = NFSTOV(np); 1203 } 1204 if (info.v3) { 1205 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1206 NFS_LATTR_NOSHRINK)); 1207 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1208 NFS_LATTR_NOSHRINK)); 1209 } else { 1210 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1211 } 1212 #if 0 1213 /* XXX MOVE TO nfs_nremove() */ 1214 if ((cnp->cn_flags & CNP_MAKEENTRY) && 1215 cnp->cn_nameiop != NAMEI_DELETE) { 1216 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */ 1217 } 1218 #endif 1219 *vpp = newvp; 1220 m_freem(info.mrep); 1221 info.mrep = NULL; 1222 nfsmout: 1223 if (error) { 1224 if (newvp != NULLVP) { 1225 vrele(newvp); 1226 *vpp = NULLVP; 1227 } 1228 if ((cnp->cn_nameiop == NAMEI_CREATE || 1229 cnp->cn_nameiop == NAMEI_RENAME) && 1230 error == ENOENT) { 1231 if (!lockparent) { 1232 vn_unlock(dvp); 1233 cnp->cn_flags |= CNP_PDIRUNLOCK; 1234 } 1235 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1236 error = EROFS; 1237 else 1238 error = EJUSTRETURN; 1239 } 1240 } 1241 lwkt_reltoken(&nmp->nm_token); 1242 return (error); 1243 } 1244 1245 /* 1246 * nfs read call. 1247 * Just call nfs_bioread() to do the work. 1248 * 1249 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 1250 * struct ucred *a_cred) 1251 */ 1252 static int 1253 nfs_read(struct vop_read_args *ap) 1254 { 1255 struct vnode *vp = ap->a_vp; 1256 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1257 int error; 1258 1259 lwkt_gettoken(&nmp->nm_token); 1260 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag); 1261 lwkt_reltoken(&nmp->nm_token); 1262 1263 return error; 1264 } 1265 1266 /* 1267 * nfs readlink call 1268 * 1269 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 1270 */ 1271 static int 1272 nfs_readlink(struct vop_readlink_args *ap) 1273 { 1274 struct vnode *vp = ap->a_vp; 1275 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1276 int error; 1277 1278 if (vp->v_type != VLNK) 1279 return (EINVAL); 1280 1281 lwkt_gettoken(&nmp->nm_token); 1282 error = nfs_bioread(vp, ap->a_uio, 0); 1283 lwkt_reltoken(&nmp->nm_token); 1284 1285 return error; 1286 } 1287 1288 /* 1289 * Do a readlink rpc. 1290 * Called by nfs_doio() from below the buffer cache. 1291 */ 1292 int 1293 nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop) 1294 { 1295 int error = 0, len, attrflag; 1296 struct nfsm_info info; 1297 1298 info.mrep = NULL; 1299 info.v3 = NFS_ISV3(vp); 1300 1301 nfsstats.rpccnt[NFSPROC_READLINK]++; 1302 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3)); 1303 ERROROUT(nfsm_fhtom(&info, vp)); 1304 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td, 1305 nfs_vpcred(vp, ND_CHECK), &error)); 1306 if (info.v3) { 1307 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1308 NFS_LATTR_NOSHRINK)); 1309 } 1310 if (!error) { 1311 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN)); 1312 if (len == NFS_MAXPATHLEN) { 1313 struct nfsnode *np = VTONFS(vp); 1314 if (np->n_size && np->n_size < NFS_MAXPATHLEN) 1315 len = np->n_size; 1316 } 1317 ERROROUT(nfsm_mtouio(&info, uiop, len)); 1318 } 1319 m_freem(info.mrep); 1320 info.mrep = NULL; 1321 nfsmout: 1322 return (error); 1323 } 1324 1325 /* 1326 * nfs synchronous read rpc using UIO 1327 */ 1328 int 1329 nfs_readrpc_uio(struct vnode *vp, struct uio *uiop) 1330 { 1331 u_int32_t *tl; 1332 struct nfsmount *nmp; 1333 int error = 0, len, retlen, tsiz, eof, attrflag; 1334 struct nfsm_info info; 1335 off_t tmp_off; 1336 1337 info.mrep = NULL; 1338 info.v3 = NFS_ISV3(vp); 1339 1340 #ifndef nolint 1341 eof = 0; 1342 #endif 1343 nmp = VFSTONFS(vp->v_mount); 1344 1345 tsiz = uiop->uio_resid; 1346 tmp_off = uiop->uio_offset + tsiz; 1347 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) 1348 return (EFBIG); 1349 tmp_off = uiop->uio_offset; 1350 while (tsiz > 0) { 1351 nfsstats.rpccnt[NFSPROC_READ]++; 1352 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1353 nfsm_reqhead(&info, vp, NFSPROC_READ, 1354 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3); 1355 ERROROUT(nfsm_fhtom(&info, vp)); 1356 tl = nfsm_build(&info, NFSX_UNSIGNED * 3); 1357 if (info.v3) { 1358 txdr_hyper(uiop->uio_offset, tl); 1359 *(tl + 2) = txdr_unsigned(len); 1360 } else { 1361 *tl++ = txdr_unsigned(uiop->uio_offset); 1362 *tl++ = txdr_unsigned(len); 1363 *tl = 0; 1364 } 1365 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td, 1366 nfs_vpcred(vp, ND_READ), &error)); 1367 if (info.v3) { 1368 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1369 NFS_LATTR_NOSHRINK)); 1370 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 1371 eof = fxdr_unsigned(int, *(tl + 1)); 1372 } else { 1373 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1374 } 1375 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len)); 1376 ERROROUT(nfsm_mtouio(&info, uiop, retlen)); 1377 m_freem(info.mrep); 1378 info.mrep = NULL; 1379 1380 /* 1381 * Handle short-read from server (NFSv3). If EOF is not 1382 * flagged (and no error occurred), but retlen is less 1383 * then the request size, we must zero-fill the remainder. 1384 */ 1385 if (retlen < len && info.v3 && eof == 0) { 1386 ERROROUT(uiomovez(len - retlen, uiop)); 1387 retlen = len; 1388 } 1389 tsiz -= retlen; 1390 1391 /* 1392 * Terminate loop on EOF or zero-length read. 1393 * 1394 * For NFSv2 a short-read indicates EOF, not zero-fill, 1395 * and also terminates the loop. 1396 */ 1397 if (info.v3) { 1398 if (eof || retlen == 0) 1399 tsiz = 0; 1400 } else if (retlen < len) { 1401 tsiz = 0; 1402 } 1403 } 1404 nfsmout: 1405 return (error); 1406 } 1407 1408 /* 1409 * nfs write call 1410 */ 1411 int 1412 nfs_writerpc_uio(struct vnode *vp, struct uio *uiop, 1413 int *iomode, int *must_commit) 1414 { 1415 u_int32_t *tl; 1416 int32_t backup; 1417 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1418 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1419 int committed = NFSV3WRITE_FILESYNC; 1420 struct nfsm_info info; 1421 1422 info.mrep = NULL; 1423 info.v3 = NFS_ISV3(vp); 1424 1425 #ifndef DIAGNOSTIC 1426 if (uiop->uio_iovcnt != 1) 1427 panic("nfs: writerpc iovcnt > 1"); 1428 #endif 1429 *must_commit = 0; 1430 tsiz = uiop->uio_resid; 1431 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1432 return (EFBIG); 1433 while (tsiz > 0) { 1434 nfsstats.rpccnt[NFSPROC_WRITE]++; 1435 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1436 nfsm_reqhead(&info, vp, NFSPROC_WRITE, 1437 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1438 ERROROUT(nfsm_fhtom(&info, vp)); 1439 if (info.v3) { 1440 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 1441 txdr_hyper(uiop->uio_offset, tl); 1442 tl += 2; 1443 *tl++ = txdr_unsigned(len); 1444 *tl++ = txdr_unsigned(*iomode); 1445 *tl = txdr_unsigned(len); 1446 } else { 1447 u_int32_t x; 1448 1449 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); 1450 /* Set both "begin" and "current" to non-garbage. */ 1451 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1452 *tl++ = x; /* "begin offset" */ 1453 *tl++ = x; /* "current offset" */ 1454 x = txdr_unsigned(len); 1455 *tl++ = x; /* total to this offset */ 1456 *tl = x; /* size of this write */ 1457 } 1458 ERROROUT(nfsm_uiotom(&info, uiop, len)); 1459 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td, 1460 nfs_vpcred(vp, ND_WRITE), &error)); 1461 if (info.v3) { 1462 /* 1463 * The write RPC returns a before and after mtime. The 1464 * nfsm_wcc_data() macro checks the before n_mtime 1465 * against the before time and stores the after time 1466 * in the nfsnode's cached vattr and n_mtime field. 1467 * The NRMODIFIED bit will be set if the before 1468 * time did not match the original mtime. 1469 */ 1470 wccflag = NFSV3_WCCCHK; 1471 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 1472 if (error == 0) { 1473 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF)); 1474 rlen = fxdr_unsigned(int, *tl++); 1475 if (rlen == 0) { 1476 error = NFSERR_IO; 1477 m_freem(info.mrep); 1478 info.mrep = NULL; 1479 break; 1480 } else if (rlen < len) { 1481 backup = len - rlen; 1482 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup; 1483 uiop->uio_iov->iov_len += backup; 1484 uiop->uio_offset -= backup; 1485 uiop->uio_resid += backup; 1486 len = rlen; 1487 } 1488 commit = fxdr_unsigned(int, *tl++); 1489 1490 /* 1491 * Return the lowest committment level 1492 * obtained by any of the RPCs. 1493 */ 1494 if (committed == NFSV3WRITE_FILESYNC) 1495 committed = commit; 1496 else if (committed == NFSV3WRITE_DATASYNC && 1497 commit == NFSV3WRITE_UNSTABLE) 1498 committed = commit; 1499 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ 1500 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1501 NFSX_V3WRITEVERF); 1502 nmp->nm_state |= NFSSTA_HASWRITEVERF; 1503 } else if (bcmp((caddr_t)tl, 1504 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1505 *must_commit = 1; 1506 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1507 NFSX_V3WRITEVERF); 1508 } 1509 } 1510 } else { 1511 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1512 } 1513 m_freem(info.mrep); 1514 info.mrep = NULL; 1515 if (error) 1516 break; 1517 tsiz -= len; 1518 } 1519 nfsmout: 1520 if (vp->v_mount->mnt_flag & MNT_ASYNC) 1521 committed = NFSV3WRITE_FILESYNC; 1522 *iomode = committed; 1523 if (error) 1524 uiop->uio_resid = tsiz; 1525 return (error); 1526 } 1527 1528 /* 1529 * nfs mknod rpc 1530 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1531 * mode set to specify the file type and the size field for rdev. 1532 */ 1533 static int 1534 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1535 struct vattr *vap) 1536 { 1537 struct nfsv2_sattr *sp; 1538 u_int32_t *tl; 1539 struct vnode *newvp = NULL; 1540 struct nfsnode *np = NULL; 1541 struct vattr vattr; 1542 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1543 int rmajor, rminor; 1544 struct nfsm_info info; 1545 1546 info.mrep = NULL; 1547 info.v3 = NFS_ISV3(dvp); 1548 1549 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1550 rmajor = txdr_unsigned(vap->va_rmajor); 1551 rminor = txdr_unsigned(vap->va_rminor); 1552 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) { 1553 rmajor = nfs_xdrneg1; 1554 rminor = nfs_xdrneg1; 1555 } else { 1556 return (EOPNOTSUPP); 1557 } 1558 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1559 return (error); 1560 } 1561 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1562 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD, 1563 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED + 1564 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1565 ERROROUT(nfsm_fhtom(&info, dvp)); 1566 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1567 NFS_MAXNAMLEN)); 1568 if (info.v3) { 1569 tl = nfsm_build(&info, NFSX_UNSIGNED); 1570 *tl++ = vtonfsv3_type(vap->va_type); 1571 nfsm_v3attrbuild(&info, vap, FALSE); 1572 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1573 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 1574 *tl++ = txdr_unsigned(vap->va_rmajor); 1575 *tl = txdr_unsigned(vap->va_rminor); 1576 } 1577 } else { 1578 sp = nfsm_build(&info, NFSX_V2SATTR); 1579 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1580 sp->sa_uid = nfs_xdrneg1; 1581 sp->sa_gid = nfs_xdrneg1; 1582 sp->sa_size = makeudev(rmajor, rminor); 1583 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1584 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1585 } 1586 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td, 1587 cnp->cn_cred, &error)); 1588 if (!error) { 1589 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1590 if (!gotvp) { 1591 if (newvp) { 1592 vput(newvp); 1593 newvp = NULL; 1594 } 1595 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1596 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1597 if (!error) 1598 newvp = NFSTOV(np); 1599 } 1600 } 1601 if (info.v3) { 1602 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1603 } 1604 m_freem(info.mrep); 1605 info.mrep = NULL; 1606 nfsmout: 1607 if (error) { 1608 if (newvp) 1609 vput(newvp); 1610 } else { 1611 *vpp = newvp; 1612 } 1613 VTONFS(dvp)->n_flag |= NLMODIFIED; 1614 if (!wccflag) 1615 VTONFS(dvp)->n_attrstamp = 0; 1616 return (error); 1617 } 1618 1619 /* 1620 * nfs mknod vop 1621 * just call nfs_mknodrpc() to do the work. 1622 * 1623 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 1624 * struct componentname *a_cnp, struct vattr *a_vap) 1625 */ 1626 /* ARGSUSED */ 1627 static int 1628 nfs_mknod(struct vop_old_mknod_args *ap) 1629 { 1630 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount); 1631 int error; 1632 1633 lwkt_gettoken(&nmp->nm_token); 1634 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1635 lwkt_reltoken(&nmp->nm_token); 1636 1637 return error; 1638 } 1639 1640 static u_long create_verf; 1641 /* 1642 * nfs file create call 1643 * 1644 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 1645 * struct componentname *a_cnp, struct vattr *a_vap) 1646 */ 1647 static int 1648 nfs_create(struct vop_old_create_args *ap) 1649 { 1650 struct vnode *dvp = ap->a_dvp; 1651 struct vattr *vap = ap->a_vap; 1652 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1653 struct componentname *cnp = ap->a_cnp; 1654 struct nfsv2_sattr *sp; 1655 u_int32_t *tl; 1656 struct nfsnode *np = NULL; 1657 struct vnode *newvp = NULL; 1658 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1659 struct vattr vattr; 1660 struct nfsm_info info; 1661 1662 info.mrep = NULL; 1663 info.v3 = NFS_ISV3(dvp); 1664 lwkt_gettoken(&nmp->nm_token); 1665 1666 /* 1667 * Oops, not for me.. 1668 */ 1669 if (vap->va_type == VSOCK) { 1670 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap); 1671 lwkt_reltoken(&nmp->nm_token); 1672 return error; 1673 } 1674 1675 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1676 lwkt_reltoken(&nmp->nm_token); 1677 return (error); 1678 } 1679 if (vap->va_vaflags & VA_EXCLUSIVE) 1680 fmode |= O_EXCL; 1681 again: 1682 nfsstats.rpccnt[NFSPROC_CREATE]++; 1683 nfsm_reqhead(&info, dvp, NFSPROC_CREATE, 1684 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED + 1685 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1686 ERROROUT(nfsm_fhtom(&info, dvp)); 1687 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1688 NFS_MAXNAMLEN)); 1689 if (info.v3) { 1690 tl = nfsm_build(&info, NFSX_UNSIGNED); 1691 if (fmode & O_EXCL) { 1692 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1693 tl = nfsm_build(&info, NFSX_V3CREATEVERF); 1694 #ifdef INET 1695 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) 1696 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr; 1697 else 1698 #endif 1699 *tl++ = create_verf; 1700 *tl = ++create_verf; 1701 } else { 1702 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1703 nfsm_v3attrbuild(&info, vap, FALSE); 1704 } 1705 } else { 1706 sp = nfsm_build(&info, NFSX_V2SATTR); 1707 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1708 sp->sa_uid = nfs_xdrneg1; 1709 sp->sa_gid = nfs_xdrneg1; 1710 sp->sa_size = 0; 1711 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1712 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1713 } 1714 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td, 1715 cnp->cn_cred, &error)); 1716 if (error == 0) { 1717 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1718 if (!gotvp) { 1719 if (newvp) { 1720 vput(newvp); 1721 newvp = NULL; 1722 } 1723 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1724 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1725 if (!error) 1726 newvp = NFSTOV(np); 1727 } 1728 } 1729 if (info.v3) { 1730 if (error == 0) 1731 error = nfsm_wcc_data(&info, dvp, &wccflag); 1732 else 1733 (void)nfsm_wcc_data(&info, dvp, &wccflag); 1734 } 1735 m_freem(info.mrep); 1736 info.mrep = NULL; 1737 nfsmout: 1738 if (error) { 1739 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1740 KKASSERT(newvp == NULL); 1741 fmode &= ~O_EXCL; 1742 goto again; 1743 } 1744 } else if (info.v3 && (fmode & O_EXCL)) { 1745 /* 1746 * We are normally called with only a partially initialized 1747 * VAP. Since the NFSv3 spec says that server may use the 1748 * file attributes to store the verifier, the spec requires 1749 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1750 * in atime, but we can't really assume that all servers will 1751 * so we ensure that our SETATTR sets both atime and mtime. 1752 */ 1753 if (vap->va_mtime.tv_sec == VNOVAL) 1754 vfs_timestamp(&vap->va_mtime); 1755 if (vap->va_atime.tv_sec == VNOVAL) 1756 vap->va_atime = vap->va_mtime; 1757 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); 1758 } 1759 if (error == 0) { 1760 /* 1761 * The new np may have enough info for access 1762 * checks, make sure rucred and wucred are 1763 * initialized for read and write rpc's. 1764 */ 1765 np = VTONFS(newvp); 1766 if (np->n_rucred == NULL) 1767 np->n_rucred = crhold(cnp->cn_cred); 1768 if (np->n_wucred == NULL) 1769 np->n_wucred = crhold(cnp->cn_cred); 1770 *ap->a_vpp = newvp; 1771 } else if (newvp) { 1772 vput(newvp); 1773 } 1774 VTONFS(dvp)->n_flag |= NLMODIFIED; 1775 if (!wccflag) 1776 VTONFS(dvp)->n_attrstamp = 0; 1777 lwkt_reltoken(&nmp->nm_token); 1778 return (error); 1779 } 1780 1781 /* 1782 * nfs file remove call 1783 * To try and make nfs semantics closer to ufs semantics, a file that has 1784 * other processes using the vnode is renamed instead of removed and then 1785 * removed later on the last close. 1786 * - If v_sysref.refcnt > 1 1787 * If a rename is not already in the works 1788 * call nfs_sillyrename() to set it up 1789 * else 1790 * do the remove rpc 1791 * 1792 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 1793 * struct componentname *a_cnp) 1794 */ 1795 static int 1796 nfs_remove(struct vop_old_remove_args *ap) 1797 { 1798 struct vnode *vp = ap->a_vp; 1799 struct vnode *dvp = ap->a_dvp; 1800 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1801 struct componentname *cnp = ap->a_cnp; 1802 struct nfsnode *np = VTONFS(vp); 1803 int error = 0; 1804 struct vattr vattr; 1805 1806 lwkt_gettoken(&nmp->nm_token); 1807 #ifndef DIAGNOSTIC 1808 if (vp->v_sysref.refcnt < 1) 1809 panic("nfs_remove: bad v_sysref.refcnt"); 1810 #endif 1811 if (vp->v_type == VDIR) { 1812 error = EPERM; 1813 } else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename && 1814 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) { 1815 /* 1816 * throw away biocache buffers, mainly to avoid 1817 * unnecessary delayed writes later. 1818 */ 1819 error = nfs_vinvalbuf(vp, 0, 1); 1820 /* Do the rpc */ 1821 if (error != EINTR) 1822 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1823 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); 1824 /* 1825 * Kludge City: If the first reply to the remove rpc is lost.. 1826 * the reply to the retransmitted request will be ENOENT 1827 * since the file was in fact removed 1828 * Therefore, we cheat and return success. 1829 */ 1830 if (error == ENOENT) 1831 error = 0; 1832 } else if (!np->n_sillyrename) { 1833 error = nfs_sillyrename(dvp, vp, cnp); 1834 } 1835 np->n_attrstamp = 0; 1836 lwkt_reltoken(&nmp->nm_token); 1837 1838 return (error); 1839 } 1840 1841 /* 1842 * nfs file remove rpc called from nfs_inactive 1843 */ 1844 int 1845 nfs_removeit(struct sillyrename *sp) 1846 { 1847 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, 1848 sp->s_cred, NULL)); 1849 } 1850 1851 /* 1852 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1853 */ 1854 static int 1855 nfs_removerpc(struct vnode *dvp, const char *name, int namelen, 1856 struct ucred *cred, struct thread *td) 1857 { 1858 int error = 0, wccflag = NFSV3_WCCRATTR; 1859 struct nfsm_info info; 1860 1861 info.mrep = NULL; 1862 info.v3 = NFS_ISV3(dvp); 1863 1864 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1865 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE, 1866 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1867 ERROROUT(nfsm_fhtom(&info, dvp)); 1868 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN)); 1869 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error)); 1870 if (info.v3) { 1871 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1872 } 1873 m_freem(info.mrep); 1874 info.mrep = NULL; 1875 nfsmout: 1876 VTONFS(dvp)->n_flag |= NLMODIFIED; 1877 if (!wccflag) 1878 VTONFS(dvp)->n_attrstamp = 0; 1879 return (error); 1880 } 1881 1882 /* 1883 * nfs file rename call 1884 * 1885 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 1886 * struct componentname *a_fcnp, struct vnode *a_tdvp, 1887 * struct vnode *a_tvp, struct componentname *a_tcnp) 1888 */ 1889 static int 1890 nfs_rename(struct vop_old_rename_args *ap) 1891 { 1892 struct vnode *fvp = ap->a_fvp; 1893 struct vnode *tvp = ap->a_tvp; 1894 struct vnode *fdvp = ap->a_fdvp; 1895 struct vnode *tdvp = ap->a_tdvp; 1896 struct componentname *tcnp = ap->a_tcnp; 1897 struct componentname *fcnp = ap->a_fcnp; 1898 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount); 1899 int error; 1900 1901 lwkt_gettoken(&nmp->nm_token); 1902 1903 /* Check for cross-device rename */ 1904 if ((fvp->v_mount != tdvp->v_mount) || 1905 (tvp && (fvp->v_mount != tvp->v_mount))) { 1906 error = EXDEV; 1907 goto out; 1908 } 1909 1910 /* 1911 * We shouldn't have to flush fvp on rename for most server-side 1912 * filesystems as the file handle should not change. Unfortunately 1913 * the inode for some filesystems (msdosfs) might be tied to the 1914 * file name or directory position so to be completely safe 1915 * vfs.nfs.flush_on_rename is set by default. Clear to improve 1916 * performance. 1917 * 1918 * We must flush tvp on rename because it might become stale on the 1919 * server after the rename. 1920 */ 1921 if (nfs_flush_on_rename) 1922 VOP_FSYNC(fvp, MNT_WAIT, 0); 1923 if (tvp) 1924 VOP_FSYNC(tvp, MNT_WAIT, 0); 1925 1926 /* 1927 * If the tvp exists and is in use, sillyrename it before doing the 1928 * rename of the new file over it. 1929 * 1930 * XXX Can't sillyrename a directory. 1931 * 1932 * We do not attempt to do any namecache purges in this old API 1933 * routine. The new API compat functions have access to the actual 1934 * namecache structures and will do it for us. 1935 */ 1936 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename && 1937 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1938 vput(tvp); 1939 tvp = NULL; 1940 } else if (tvp) { 1941 ; 1942 } 1943 1944 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1945 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1946 tcnp->cn_td); 1947 1948 out: 1949 lwkt_reltoken(&nmp->nm_token); 1950 if (tdvp == tvp) 1951 vrele(tdvp); 1952 else 1953 vput(tdvp); 1954 if (tvp) 1955 vput(tvp); 1956 vrele(fdvp); 1957 vrele(fvp); 1958 /* 1959 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1960 */ 1961 if (error == ENOENT) 1962 error = 0; 1963 return (error); 1964 } 1965 1966 /* 1967 * nfs file rename rpc called from nfs_remove() above 1968 */ 1969 static int 1970 nfs_renameit(struct vnode *sdvp, struct componentname *scnp, 1971 struct sillyrename *sp) 1972 { 1973 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1974 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); 1975 } 1976 1977 /* 1978 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1979 */ 1980 static int 1981 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, 1982 struct vnode *tdvp, const char *tnameptr, int tnamelen, 1983 struct ucred *cred, struct thread *td) 1984 { 1985 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1986 struct nfsm_info info; 1987 1988 info.mrep = NULL; 1989 info.v3 = NFS_ISV3(fdvp); 1990 1991 nfsstats.rpccnt[NFSPROC_RENAME]++; 1992 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME, 1993 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 + 1994 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen)); 1995 ERROROUT(nfsm_fhtom(&info, fdvp)); 1996 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN)); 1997 ERROROUT(nfsm_fhtom(&info, tdvp)); 1998 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN)); 1999 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error)); 2000 if (info.v3) { 2001 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag)); 2002 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag)); 2003 } 2004 m_freem(info.mrep); 2005 info.mrep = NULL; 2006 nfsmout: 2007 VTONFS(fdvp)->n_flag |= NLMODIFIED; 2008 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2009 if (!fwccflag) 2010 VTONFS(fdvp)->n_attrstamp = 0; 2011 if (!twccflag) 2012 VTONFS(tdvp)->n_attrstamp = 0; 2013 return (error); 2014 } 2015 2016 /* 2017 * nfs hard link create call 2018 * 2019 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 2020 * struct componentname *a_cnp) 2021 */ 2022 static int 2023 nfs_link(struct vop_old_link_args *ap) 2024 { 2025 struct vnode *vp = ap->a_vp; 2026 struct vnode *tdvp = ap->a_tdvp; 2027 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount); 2028 struct componentname *cnp = ap->a_cnp; 2029 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2030 struct nfsm_info info; 2031 2032 if (vp->v_mount != tdvp->v_mount) { 2033 return (EXDEV); 2034 } 2035 lwkt_gettoken(&nmp->nm_token); 2036 2037 /* 2038 * The attribute cache may get out of sync with the server on link. 2039 * Pushing writes to the server before handle was inherited from 2040 * long long ago and it is unclear if we still need to do this. 2041 * Defaults to off. 2042 */ 2043 if (nfs_flush_on_hlink) 2044 VOP_FSYNC(vp, MNT_WAIT, 0); 2045 2046 info.mrep = NULL; 2047 info.v3 = NFS_ISV3(vp); 2048 2049 nfsstats.rpccnt[NFSPROC_LINK]++; 2050 nfsm_reqhead(&info, vp, NFSPROC_LINK, 2051 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED + 2052 nfsm_rndup(cnp->cn_namelen)); 2053 ERROROUT(nfsm_fhtom(&info, vp)); 2054 ERROROUT(nfsm_fhtom(&info, tdvp)); 2055 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2056 NFS_MAXNAMLEN)); 2057 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td, 2058 cnp->cn_cred, &error)); 2059 if (info.v3) { 2060 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2061 NFS_LATTR_NOSHRINK)); 2062 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag)); 2063 } 2064 m_freem(info.mrep); 2065 info.mrep = NULL; 2066 nfsmout: 2067 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2068 if (!attrflag) 2069 VTONFS(vp)->n_attrstamp = 0; 2070 if (!wccflag) 2071 VTONFS(tdvp)->n_attrstamp = 0; 2072 /* 2073 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2074 */ 2075 if (error == EEXIST) 2076 error = 0; 2077 lwkt_reltoken(&nmp->nm_token); 2078 return (error); 2079 } 2080 2081 /* 2082 * nfs symbolic link create call 2083 * 2084 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 2085 * struct componentname *a_cnp, struct vattr *a_vap, 2086 * char *a_target) 2087 */ 2088 static int 2089 nfs_symlink(struct vop_old_symlink_args *ap) 2090 { 2091 struct vnode *dvp = ap->a_dvp; 2092 struct vattr *vap = ap->a_vap; 2093 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2094 struct componentname *cnp = ap->a_cnp; 2095 struct nfsv2_sattr *sp; 2096 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2097 struct vnode *newvp = NULL; 2098 struct nfsm_info info; 2099 2100 info.mrep = NULL; 2101 info.v3 = NFS_ISV3(dvp); 2102 lwkt_gettoken(&nmp->nm_token); 2103 2104 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2105 slen = strlen(ap->a_target); 2106 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK, 2107 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED + 2108 nfsm_rndup(cnp->cn_namelen) + 2109 nfsm_rndup(slen) + NFSX_SATTR(info.v3)); 2110 ERROROUT(nfsm_fhtom(&info, dvp)); 2111 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2112 NFS_MAXNAMLEN)); 2113 if (info.v3) { 2114 nfsm_v3attrbuild(&info, vap, FALSE); 2115 } 2116 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN)); 2117 if (info.v3 == 0) { 2118 sp = nfsm_build(&info, NFSX_V2SATTR); 2119 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2120 sp->sa_uid = nfs_xdrneg1; 2121 sp->sa_gid = nfs_xdrneg1; 2122 sp->sa_size = nfs_xdrneg1; 2123 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2124 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2125 } 2126 2127 /* 2128 * Issue the NFS request and get the rpc response. 2129 * 2130 * Only NFSv3 responses returning an error of 0 actually return 2131 * a file handle that can be converted into newvp without having 2132 * to do an extra lookup rpc. 2133 */ 2134 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td, 2135 cnp->cn_cred, &error)); 2136 if (info.v3) { 2137 if (error == 0) { 2138 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2139 } 2140 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2141 } 2142 2143 /* 2144 * out code jumps -> here, mrep is also freed. 2145 */ 2146 2147 m_freem(info.mrep); 2148 info.mrep = NULL; 2149 nfsmout: 2150 2151 /* 2152 * If we get an EEXIST error, silently convert it to no-error 2153 * in case of an NFS retry. 2154 */ 2155 if (error == EEXIST) 2156 error = 0; 2157 2158 /* 2159 * If we do not have (or no longer have) an error, and we could 2160 * not extract the newvp from the response due to the request being 2161 * NFSv2 or the error being EEXIST. We have to do a lookup in order 2162 * to obtain a newvp to return. 2163 */ 2164 if (error == 0 && newvp == NULL) { 2165 struct nfsnode *np = NULL; 2166 2167 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2168 cnp->cn_cred, cnp->cn_td, &np); 2169 if (!error) 2170 newvp = NFSTOV(np); 2171 } 2172 if (error) { 2173 if (newvp) 2174 vput(newvp); 2175 } else { 2176 *ap->a_vpp = newvp; 2177 } 2178 VTONFS(dvp)->n_flag |= NLMODIFIED; 2179 if (!wccflag) 2180 VTONFS(dvp)->n_attrstamp = 0; 2181 lwkt_reltoken(&nmp->nm_token); 2182 2183 return (error); 2184 } 2185 2186 /* 2187 * nfs make dir call 2188 * 2189 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 2190 * struct componentname *a_cnp, struct vattr *a_vap) 2191 */ 2192 static int 2193 nfs_mkdir(struct vop_old_mkdir_args *ap) 2194 { 2195 struct vnode *dvp = ap->a_dvp; 2196 struct vattr *vap = ap->a_vap; 2197 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2198 struct componentname *cnp = ap->a_cnp; 2199 struct nfsv2_sattr *sp; 2200 struct nfsnode *np = NULL; 2201 struct vnode *newvp = NULL; 2202 struct vattr vattr; 2203 int error = 0, wccflag = NFSV3_WCCRATTR; 2204 int gotvp = 0; 2205 int len; 2206 struct nfsm_info info; 2207 2208 info.mrep = NULL; 2209 info.v3 = NFS_ISV3(dvp); 2210 lwkt_gettoken(&nmp->nm_token); 2211 2212 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 2213 lwkt_reltoken(&nmp->nm_token); 2214 return (error); 2215 } 2216 len = cnp->cn_namelen; 2217 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2218 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR, 2219 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2220 nfsm_rndup(len) + NFSX_SATTR(info.v3)); 2221 ERROROUT(nfsm_fhtom(&info, dvp)); 2222 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 2223 if (info.v3) { 2224 nfsm_v3attrbuild(&info, vap, FALSE); 2225 } else { 2226 sp = nfsm_build(&info, NFSX_V2SATTR); 2227 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2228 sp->sa_uid = nfs_xdrneg1; 2229 sp->sa_gid = nfs_xdrneg1; 2230 sp->sa_size = nfs_xdrneg1; 2231 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2232 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2233 } 2234 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td, 2235 cnp->cn_cred, &error)); 2236 if (error == 0) { 2237 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2238 } 2239 if (info.v3) { 2240 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2241 } 2242 m_freem(info.mrep); 2243 info.mrep = NULL; 2244 nfsmout: 2245 VTONFS(dvp)->n_flag |= NLMODIFIED; 2246 if (!wccflag) 2247 VTONFS(dvp)->n_attrstamp = 0; 2248 /* 2249 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2250 * if we can succeed in looking up the directory. 2251 */ 2252 if (error == EEXIST || (!error && !gotvp)) { 2253 if (newvp) { 2254 vrele(newvp); 2255 newvp = NULL; 2256 } 2257 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2258 cnp->cn_td, &np); 2259 if (!error) { 2260 newvp = NFSTOV(np); 2261 if (newvp->v_type != VDIR) 2262 error = EEXIST; 2263 } 2264 } 2265 if (error) { 2266 if (newvp) 2267 vrele(newvp); 2268 } else { 2269 *ap->a_vpp = newvp; 2270 } 2271 lwkt_reltoken(&nmp->nm_token); 2272 return (error); 2273 } 2274 2275 /* 2276 * nfs remove directory call 2277 * 2278 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 2279 * struct componentname *a_cnp) 2280 */ 2281 static int 2282 nfs_rmdir(struct vop_old_rmdir_args *ap) 2283 { 2284 struct vnode *vp = ap->a_vp; 2285 struct vnode *dvp = ap->a_dvp; 2286 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2287 struct componentname *cnp = ap->a_cnp; 2288 int error = 0, wccflag = NFSV3_WCCRATTR; 2289 struct nfsm_info info; 2290 2291 info.mrep = NULL; 2292 info.v3 = NFS_ISV3(dvp); 2293 2294 if (dvp == vp) 2295 return (EINVAL); 2296 2297 lwkt_gettoken(&nmp->nm_token); 2298 2299 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2300 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR, 2301 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2302 nfsm_rndup(cnp->cn_namelen)); 2303 ERROROUT(nfsm_fhtom(&info, dvp)); 2304 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2305 NFS_MAXNAMLEN)); 2306 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td, 2307 cnp->cn_cred, &error)); 2308 if (info.v3) { 2309 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2310 } 2311 m_freem(info.mrep); 2312 info.mrep = NULL; 2313 nfsmout: 2314 VTONFS(dvp)->n_flag |= NLMODIFIED; 2315 if (!wccflag) 2316 VTONFS(dvp)->n_attrstamp = 0; 2317 /* 2318 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2319 */ 2320 if (error == ENOENT) 2321 error = 0; 2322 lwkt_reltoken(&nmp->nm_token); 2323 2324 return (error); 2325 } 2326 2327 /* 2328 * nfs readdir call 2329 * 2330 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 2331 */ 2332 static int 2333 nfs_readdir(struct vop_readdir_args *ap) 2334 { 2335 struct vnode *vp = ap->a_vp; 2336 struct nfsnode *np = VTONFS(vp); 2337 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2338 struct uio *uio = ap->a_uio; 2339 int tresid, error; 2340 struct vattr vattr; 2341 2342 if (vp->v_type != VDIR) 2343 return (EPERM); 2344 2345 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 2346 return (error); 2347 2348 lwkt_gettoken(&nmp->nm_token); 2349 2350 /* 2351 * If we have a valid EOF offset cache we must call VOP_GETATTR() 2352 * and then check that is still valid, or if this is an NQNFS mount 2353 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that 2354 * VOP_GETATTR() does not necessarily go to the wire. 2355 */ 2356 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2357 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) { 2358 if (VOP_GETATTR(vp, &vattr) == 0 && 2359 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0 2360 ) { 2361 nfsstats.direofcache_hits++; 2362 goto done; 2363 } 2364 } 2365 2366 /* 2367 * Call nfs_bioread() to do the real work. nfs_bioread() does its 2368 * own cache coherency checks so we do not have to. 2369 */ 2370 tresid = uio->uio_resid; 2371 error = nfs_bioread(vp, uio, 0); 2372 2373 if (!error && uio->uio_resid == tresid) 2374 nfsstats.direofcache_misses++; 2375 done: 2376 lwkt_reltoken(&nmp->nm_token); 2377 vn_unlock(vp); 2378 2379 return (error); 2380 } 2381 2382 /* 2383 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc. 2384 * 2385 * Note that for directories, nfs_bioread maintains the underlying nfs-centric 2386 * offset/block and converts the nfs formatted directory entries for userland 2387 * consumption as well as deals with offsets into the middle of blocks. 2388 * nfs_doio only deals with logical blocks. In particular, uio_offset will 2389 * be block-bounded. It must convert to cookies for the actual RPC. 2390 */ 2391 int 2392 nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop) 2393 { 2394 int len, left; 2395 struct nfs_dirent *dp = NULL; 2396 u_int32_t *tl; 2397 nfsuint64 *cookiep; 2398 caddr_t cp; 2399 nfsuint64 cookie; 2400 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2401 struct nfsnode *dnp = VTONFS(vp); 2402 u_quad_t fileno; 2403 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2404 int attrflag; 2405 struct nfsm_info info; 2406 2407 info.mrep = NULL; 2408 info.v3 = NFS_ISV3(vp); 2409 2410 #ifndef DIAGNOSTIC 2411 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2412 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2413 panic("nfs readdirrpc bad uio"); 2414 #endif 2415 2416 /* 2417 * If there is no cookie, assume directory was stale. 2418 */ 2419 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2420 if (cookiep) 2421 cookie = *cookiep; 2422 else 2423 return (NFSERR_BAD_COOKIE); 2424 /* 2425 * Loop around doing readdir rpc's of size nm_readdirsize 2426 * truncated to a multiple of DIRBLKSIZ. 2427 * The stopping criteria is EOF or buffer full. 2428 */ 2429 while (more_dirs && bigenough) { 2430 nfsstats.rpccnt[NFSPROC_READDIR]++; 2431 nfsm_reqhead(&info, vp, NFSPROC_READDIR, 2432 NFSX_FH(info.v3) + NFSX_READDIR(info.v3)); 2433 ERROROUT(nfsm_fhtom(&info, vp)); 2434 if (info.v3) { 2435 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 2436 *tl++ = cookie.nfsuquad[0]; 2437 *tl++ = cookie.nfsuquad[1]; 2438 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2439 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2440 } else { 2441 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 2442 *tl++ = cookie.nfsuquad[0]; 2443 } 2444 *tl = txdr_unsigned(nmp->nm_readdirsize); 2445 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR, 2446 uiop->uio_td, 2447 nfs_vpcred(vp, ND_READ), &error)); 2448 if (info.v3) { 2449 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2450 NFS_LATTR_NOSHRINK)); 2451 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2452 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2453 dnp->n_cookieverf.nfsuquad[1] = *tl; 2454 } 2455 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2456 more_dirs = fxdr_unsigned(int, *tl); 2457 2458 /* loop thru the dir entries, converting them to std form */ 2459 while (more_dirs && bigenough) { 2460 if (info.v3) { 2461 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2462 fileno = fxdr_hyper(tl); 2463 len = fxdr_unsigned(int, *(tl + 2)); 2464 } else { 2465 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2466 fileno = fxdr_unsigned(u_quad_t, *tl++); 2467 len = fxdr_unsigned(int, *tl); 2468 } 2469 if (len <= 0 || len > NFS_MAXNAMLEN) { 2470 error = EBADRPC; 2471 m_freem(info.mrep); 2472 info.mrep = NULL; 2473 goto nfsmout; 2474 } 2475 2476 /* 2477 * len is the number of bytes in the path element 2478 * name, not including the \0 termination. 2479 * 2480 * tlen is the number of bytes w have to reserve for 2481 * the path element name. 2482 */ 2483 tlen = nfsm_rndup(len); 2484 if (tlen == len) 2485 tlen += 4; /* To ensure null termination */ 2486 2487 /* 2488 * If the entry would cross a DIRBLKSIZ boundary, 2489 * extend the previous nfs_dirent to cover the 2490 * remaining space. 2491 */ 2492 left = DIRBLKSIZ - blksiz; 2493 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2494 dp->nfs_reclen += left; 2495 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2496 uiop->uio_iov->iov_len -= left; 2497 uiop->uio_offset += left; 2498 uiop->uio_resid -= left; 2499 blksiz = 0; 2500 } 2501 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2502 bigenough = 0; 2503 if (bigenough) { 2504 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2505 dp->nfs_ino = fileno; 2506 dp->nfs_namlen = len; 2507 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2508 dp->nfs_type = DT_UNKNOWN; 2509 blksiz += dp->nfs_reclen; 2510 if (blksiz == DIRBLKSIZ) 2511 blksiz = 0; 2512 uiop->uio_offset += sizeof(struct nfs_dirent); 2513 uiop->uio_resid -= sizeof(struct nfs_dirent); 2514 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2515 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2516 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2517 2518 /* 2519 * The uiop has advanced by nfs_dirent + len 2520 * but really needs to advance by 2521 * nfs_dirent + tlen 2522 */ 2523 cp = uiop->uio_iov->iov_base; 2524 tlen -= len; 2525 *cp = '\0'; /* null terminate */ 2526 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2527 uiop->uio_iov->iov_len -= tlen; 2528 uiop->uio_offset += tlen; 2529 uiop->uio_resid -= tlen; 2530 } else { 2531 /* 2532 * NFS strings must be rounded up (nfsm_myouio 2533 * handled that in the bigenough case). 2534 */ 2535 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2536 } 2537 if (info.v3) { 2538 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2539 } else { 2540 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2541 } 2542 2543 /* 2544 * If we were able to accomodate the last entry, 2545 * get the cookie for the next one. Otherwise 2546 * hold-over the cookie for the one we were not 2547 * able to accomodate. 2548 */ 2549 if (bigenough) { 2550 cookie.nfsuquad[0] = *tl++; 2551 if (info.v3) 2552 cookie.nfsuquad[1] = *tl++; 2553 } else if (info.v3) { 2554 tl += 2; 2555 } else { 2556 tl++; 2557 } 2558 more_dirs = fxdr_unsigned(int, *tl); 2559 } 2560 /* 2561 * If at end of rpc data, get the eof boolean 2562 */ 2563 if (!more_dirs) { 2564 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2565 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2566 } 2567 m_freem(info.mrep); 2568 info.mrep = NULL; 2569 } 2570 /* 2571 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2572 * by increasing d_reclen for the last record. 2573 */ 2574 if (blksiz > 0) { 2575 left = DIRBLKSIZ - blksiz; 2576 dp->nfs_reclen += left; 2577 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2578 uiop->uio_iov->iov_len -= left; 2579 uiop->uio_offset += left; 2580 uiop->uio_resid -= left; 2581 } 2582 2583 if (bigenough) { 2584 /* 2585 * We hit the end of the directory, update direofoffset. 2586 */ 2587 dnp->n_direofoffset = uiop->uio_offset; 2588 } else { 2589 /* 2590 * There is more to go, insert the link cookie so the 2591 * next block can be read. 2592 */ 2593 if (uiop->uio_resid > 0) 2594 kprintf("EEK! readdirrpc resid > 0\n"); 2595 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2596 *cookiep = cookie; 2597 } 2598 nfsmout: 2599 return (error); 2600 } 2601 2602 /* 2603 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2604 */ 2605 int 2606 nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop) 2607 { 2608 int len, left; 2609 struct nfs_dirent *dp; 2610 u_int32_t *tl; 2611 struct vnode *newvp; 2612 nfsuint64 *cookiep; 2613 caddr_t dpossav1, dpossav2; 2614 caddr_t cp; 2615 struct mbuf *mdsav1, *mdsav2; 2616 nfsuint64 cookie; 2617 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2618 struct nfsnode *dnp = VTONFS(vp), *np; 2619 nfsfh_t *fhp; 2620 u_quad_t fileno; 2621 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2622 int attrflag, fhsize; 2623 struct nchandle nch; 2624 struct nchandle dnch; 2625 struct nlcomponent nlc; 2626 struct nfsm_info info; 2627 2628 info.mrep = NULL; 2629 info.v3 = 1; 2630 2631 #ifndef nolint 2632 dp = NULL; 2633 #endif 2634 #ifndef DIAGNOSTIC 2635 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2636 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2637 panic("nfs readdirplusrpc bad uio"); 2638 #endif 2639 /* 2640 * Obtain the namecache record for the directory so we have something 2641 * to use as a basis for creating the entries. This function will 2642 * return a held (but not locked) ncp. The ncp may be disconnected 2643 * from the tree and cannot be used for upward traversals, and the 2644 * ncp may be unnamed. Note that other unrelated operations may 2645 * cause the ncp to be named at any time. 2646 * 2647 * We have to lock the ncp to prevent a lock order reversal when 2648 * rdirplus does nlookups of the children, because the vnode is 2649 * locked and has to stay that way. 2650 */ 2651 cache_fromdvp(vp, NULL, 0, &dnch); 2652 bzero(&nlc, sizeof(nlc)); 2653 newvp = NULLVP; 2654 2655 /* 2656 * If there is no cookie, assume directory was stale. 2657 */ 2658 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2659 if (cookiep) { 2660 cookie = *cookiep; 2661 } else { 2662 if (dnch.ncp) 2663 cache_drop(&dnch); 2664 return (NFSERR_BAD_COOKIE); 2665 } 2666 2667 /* 2668 * Loop around doing readdir rpc's of size nm_readdirsize 2669 * truncated to a multiple of DIRBLKSIZ. 2670 * The stopping criteria is EOF or buffer full. 2671 */ 2672 while (more_dirs && bigenough) { 2673 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2674 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS, 2675 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2676 ERROROUT(nfsm_fhtom(&info, vp)); 2677 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED); 2678 *tl++ = cookie.nfsuquad[0]; 2679 *tl++ = cookie.nfsuquad[1]; 2680 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2681 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2682 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2683 *tl = txdr_unsigned(nmp->nm_rsize); 2684 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS, 2685 uiop->uio_td, 2686 nfs_vpcred(vp, ND_READ), &error)); 2687 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2688 NFS_LATTR_NOSHRINK)); 2689 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2690 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2691 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2692 more_dirs = fxdr_unsigned(int, *tl); 2693 2694 /* loop thru the dir entries, doctoring them to 4bsd form */ 2695 while (more_dirs && bigenough) { 2696 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2697 fileno = fxdr_hyper(tl); 2698 len = fxdr_unsigned(int, *(tl + 2)); 2699 if (len <= 0 || len > NFS_MAXNAMLEN) { 2700 error = EBADRPC; 2701 m_freem(info.mrep); 2702 info.mrep = NULL; 2703 goto nfsmout; 2704 } 2705 tlen = nfsm_rndup(len); 2706 if (tlen == len) 2707 tlen += 4; /* To ensure null termination*/ 2708 left = DIRBLKSIZ - blksiz; 2709 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2710 dp->nfs_reclen += left; 2711 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2712 uiop->uio_iov->iov_len -= left; 2713 uiop->uio_offset += left; 2714 uiop->uio_resid -= left; 2715 blksiz = 0; 2716 } 2717 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2718 bigenough = 0; 2719 if (bigenough) { 2720 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2721 dp->nfs_ino = fileno; 2722 dp->nfs_namlen = len; 2723 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2724 dp->nfs_type = DT_UNKNOWN; 2725 blksiz += dp->nfs_reclen; 2726 if (blksiz == DIRBLKSIZ) 2727 blksiz = 0; 2728 uiop->uio_offset += sizeof(struct nfs_dirent); 2729 uiop->uio_resid -= sizeof(struct nfs_dirent); 2730 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2731 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2732 nlc.nlc_nameptr = uiop->uio_iov->iov_base; 2733 nlc.nlc_namelen = len; 2734 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2735 cp = uiop->uio_iov->iov_base; 2736 tlen -= len; 2737 *cp = '\0'; 2738 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2739 uiop->uio_iov->iov_len -= tlen; 2740 uiop->uio_offset += tlen; 2741 uiop->uio_resid -= tlen; 2742 } else { 2743 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2744 } 2745 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2746 if (bigenough) { 2747 cookie.nfsuquad[0] = *tl++; 2748 cookie.nfsuquad[1] = *tl++; 2749 } else { 2750 tl += 2; 2751 } 2752 2753 /* 2754 * Since the attributes are before the file handle 2755 * (sigh), we must skip over the attributes and then 2756 * come back and get them. 2757 */ 2758 attrflag = fxdr_unsigned(int, *tl); 2759 if (attrflag) { 2760 dpossav1 = info.dpos; 2761 mdsav1 = info.md; 2762 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR)); 2763 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2764 doit = fxdr_unsigned(int, *tl); 2765 if (doit) { 2766 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 2767 } 2768 if (doit && bigenough && !nlcdegenerate(&nlc) && 2769 !NFS_CMPFH(dnp, fhp, fhsize) 2770 ) { 2771 if (dnch.ncp) { 2772 #if 0 2773 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n", 2774 nlc.nlc_namelen, nlc.nlc_namelen, 2775 nlc.nlc_nameptr); 2776 #endif 2777 /* 2778 * This is a bit hokey but there isn't 2779 * much we can do about it. We can't 2780 * hold the directory vp locked while 2781 * doing lookups and gets. 2782 */ 2783 nch = cache_nlookup_nonblock(&dnch, &nlc); 2784 if (nch.ncp == NULL) 2785 goto rdfail; 2786 cache_setunresolved(&nch); 2787 error = nfs_nget_nonblock(vp->v_mount, fhp, 2788 fhsize, &np); 2789 if (error) { 2790 cache_put(&nch); 2791 goto rdfail; 2792 } 2793 newvp = NFSTOV(np); 2794 dpossav2 = info.dpos; 2795 info.dpos = dpossav1; 2796 mdsav2 = info.md; 2797 info.md = mdsav1; 2798 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 2799 info.dpos = dpossav2; 2800 info.md = mdsav2; 2801 dp->nfs_type = 2802 IFTODT(VTTOIF(np->n_vattr.va_type)); 2803 nfs_cache_setvp(&nch, newvp, 2804 nfspos_cache_timeout); 2805 vput(newvp); 2806 newvp = NULLVP; 2807 cache_put(&nch); 2808 } else { 2809 rdfail: 2810 ; 2811 #if 0 2812 kprintf("Warning: NFS/rddirplus, " 2813 "UNABLE TO ENTER %*.*s\n", 2814 nlc.nlc_namelen, nlc.nlc_namelen, 2815 nlc.nlc_nameptr); 2816 #endif 2817 } 2818 } 2819 } else { 2820 /* Just skip over the file handle */ 2821 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2822 i = fxdr_unsigned(int, *tl); 2823 ERROROUT(nfsm_adv(&info, nfsm_rndup(i))); 2824 } 2825 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2826 more_dirs = fxdr_unsigned(int, *tl); 2827 } 2828 /* 2829 * If at end of rpc data, get the eof boolean 2830 */ 2831 if (!more_dirs) { 2832 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2833 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2834 } 2835 m_freem(info.mrep); 2836 info.mrep = NULL; 2837 } 2838 /* 2839 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2840 * by increasing d_reclen for the last record. 2841 */ 2842 if (blksiz > 0) { 2843 left = DIRBLKSIZ - blksiz; 2844 dp->nfs_reclen += left; 2845 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2846 uiop->uio_iov->iov_len -= left; 2847 uiop->uio_offset += left; 2848 uiop->uio_resid -= left; 2849 } 2850 2851 /* 2852 * We are now either at the end of the directory or have filled the 2853 * block. 2854 */ 2855 if (bigenough) { 2856 dnp->n_direofoffset = uiop->uio_offset; 2857 } else { 2858 if (uiop->uio_resid > 0) 2859 kprintf("EEK! readdirplusrpc resid > 0\n"); 2860 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2861 *cookiep = cookie; 2862 } 2863 nfsmout: 2864 if (newvp != NULLVP) { 2865 if (newvp == vp) 2866 vrele(newvp); 2867 else 2868 vput(newvp); 2869 newvp = NULLVP; 2870 } 2871 if (dnch.ncp) 2872 cache_drop(&dnch); 2873 return (error); 2874 } 2875 2876 /* 2877 * Silly rename. To make the NFS filesystem that is stateless look a little 2878 * more like the "ufs" a remove of an active vnode is translated to a rename 2879 * to a funny looking filename that is removed by nfs_inactive on the 2880 * nfsnode. There is the potential for another process on a different client 2881 * to create the same funny name between the nfs_lookitup() fails and the 2882 * nfs_rename() completes, but... 2883 */ 2884 static int 2885 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2886 { 2887 struct sillyrename *sp; 2888 struct nfsnode *np; 2889 int error; 2890 2891 /* 2892 * We previously purged dvp instead of vp. I don't know why, it 2893 * completely destroys performance. We can't do it anyway with the 2894 * new VFS API since we would be breaking the namecache topology. 2895 */ 2896 cache_purge(vp); /* XXX */ 2897 np = VTONFS(vp); 2898 #ifndef DIAGNOSTIC 2899 if (vp->v_type == VDIR) 2900 panic("nfs: sillyrename dir"); 2901 #endif 2902 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2903 M_NFSREQ, M_WAITOK); 2904 sp->s_cred = crdup(cnp->cn_cred); 2905 sp->s_dvp = dvp; 2906 vref(dvp); 2907 2908 /* Fudge together a funny name */ 2909 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", 2910 (int)(intptr_t)cnp->cn_td); 2911 2912 /* Try lookitups until we get one that isn't there */ 2913 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2914 cnp->cn_td, NULL) == 0) { 2915 sp->s_name[4]++; 2916 if (sp->s_name[4] > 'z') { 2917 error = EINVAL; 2918 goto bad; 2919 } 2920 } 2921 error = nfs_renameit(dvp, cnp, sp); 2922 if (error) 2923 goto bad; 2924 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2925 cnp->cn_td, &np); 2926 np->n_sillyrename = sp; 2927 return (0); 2928 bad: 2929 vrele(sp->s_dvp); 2930 crfree(sp->s_cred); 2931 kfree((caddr_t)sp, M_NFSREQ); 2932 return (error); 2933 } 2934 2935 /* 2936 * Look up a file name and optionally either update the file handle or 2937 * allocate an nfsnode, depending on the value of npp. 2938 * npp == NULL --> just do the lookup 2939 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2940 * handled too 2941 * *npp != NULL --> update the file handle in the vnode 2942 */ 2943 static int 2944 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, 2945 struct thread *td, struct nfsnode **npp) 2946 { 2947 struct vnode *newvp = NULL; 2948 struct nfsnode *np, *dnp = VTONFS(dvp); 2949 int error = 0, fhlen, attrflag; 2950 nfsfh_t *nfhp; 2951 struct nfsm_info info; 2952 2953 info.mrep = NULL; 2954 info.v3 = NFS_ISV3(dvp); 2955 2956 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2957 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 2958 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2959 ERROROUT(nfsm_fhtom(&info, dvp)); 2960 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN)); 2961 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error)); 2962 if (npp && !error) { 2963 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp)); 2964 if (*npp) { 2965 np = *npp; 2966 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2967 kfree((caddr_t)np->n_fhp, M_NFSBIGFH); 2968 np->n_fhp = &np->n_fh; 2969 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2970 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK); 2971 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2972 np->n_fhsize = fhlen; 2973 newvp = NFSTOV(np); 2974 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2975 vref(dvp); 2976 newvp = dvp; 2977 } else { 2978 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2979 if (error) { 2980 m_freem(info.mrep); 2981 info.mrep = NULL; 2982 return (error); 2983 } 2984 newvp = NFSTOV(np); 2985 } 2986 if (info.v3) { 2987 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 2988 NFS_LATTR_NOSHRINK)); 2989 if (!attrflag && *npp == NULL) { 2990 m_freem(info.mrep); 2991 info.mrep = NULL; 2992 if (newvp == dvp) 2993 vrele(newvp); 2994 else 2995 vput(newvp); 2996 return (ENOENT); 2997 } 2998 } else { 2999 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 3000 } 3001 } 3002 m_freem(info.mrep); 3003 info.mrep = NULL; 3004 nfsmout: 3005 if (npp && *npp == NULL) { 3006 if (error) { 3007 if (newvp) { 3008 if (newvp == dvp) 3009 vrele(newvp); 3010 else 3011 vput(newvp); 3012 } 3013 } else 3014 *npp = np; 3015 } 3016 return (error); 3017 } 3018 3019 /* 3020 * Nfs Version 3 commit rpc 3021 * 3022 * We call it 'uio' to distinguish it from 'bio' but there is no real uio 3023 * involved. 3024 */ 3025 int 3026 nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) 3027 { 3028 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3029 int error = 0, wccflag = NFSV3_WCCRATTR; 3030 struct nfsm_info info; 3031 u_int32_t *tl; 3032 3033 info.mrep = NULL; 3034 info.v3 = 1; 3035 3036 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 3037 return (0); 3038 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3039 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1)); 3040 ERROROUT(nfsm_fhtom(&info, vp)); 3041 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED); 3042 txdr_hyper(offset, tl); 3043 tl += 2; 3044 *tl = txdr_unsigned(cnt); 3045 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td, 3046 nfs_vpcred(vp, ND_WRITE), &error)); 3047 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 3048 if (!error) { 3049 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF)); 3050 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 3051 NFSX_V3WRITEVERF)) { 3052 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 3053 NFSX_V3WRITEVERF); 3054 error = NFSERR_STALEWRITEVERF; 3055 } 3056 } 3057 m_freem(info.mrep); 3058 info.mrep = NULL; 3059 nfsmout: 3060 return (error); 3061 } 3062 3063 /* 3064 * Kludge City.. 3065 * - make nfs_bmap() essentially a no-op that does no translation 3066 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3067 * (Maybe I could use the process's page mapping, but I was concerned that 3068 * Kernel Write might not be enabled and also figured copyout() would do 3069 * a lot more work than bcopy() and also it currently happens in the 3070 * context of the swapper process (2). 3071 * 3072 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, 3073 * off_t *a_doffsetp, int *a_runp, int *a_runb) 3074 */ 3075 static int 3076 nfs_bmap(struct vop_bmap_args *ap) 3077 { 3078 /* no token lock required */ 3079 if (ap->a_doffsetp != NULL) 3080 *ap->a_doffsetp = ap->a_loffset; 3081 if (ap->a_runp != NULL) 3082 *ap->a_runp = 0; 3083 if (ap->a_runb != NULL) 3084 *ap->a_runb = 0; 3085 return (0); 3086 } 3087 3088 /* 3089 * Strategy routine. 3090 */ 3091 static int 3092 nfs_strategy(struct vop_strategy_args *ap) 3093 { 3094 struct bio *bio = ap->a_bio; 3095 struct bio *nbio; 3096 struct buf *bp __debugvar = bio->bio_buf; 3097 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3098 struct thread *td; 3099 int error; 3100 3101 KASSERT(bp->b_cmd != BUF_CMD_DONE, 3102 ("nfs_strategy: buffer %p unexpectedly marked done", bp)); 3103 KASSERT(BUF_REFCNT(bp) > 0, 3104 ("nfs_strategy: buffer %p not locked", bp)); 3105 3106 if (bio->bio_flags & BIO_SYNC) 3107 td = curthread; /* XXX */ 3108 else 3109 td = NULL; 3110 3111 lwkt_gettoken(&nmp->nm_token); 3112 3113 /* 3114 * We probably don't need to push an nbio any more since no 3115 * block conversion is required due to the use of 64 bit byte 3116 * offsets, but do it anyway. 3117 * 3118 * NOTE: When NFS callers itself via this strategy routines and 3119 * sets up a synchronous I/O, it expects the I/O to run 3120 * synchronously (its bio_done routine just assumes it), 3121 * so for now we have to honor the bit. 3122 */ 3123 nbio = push_bio(bio); 3124 nbio->bio_offset = bio->bio_offset; 3125 nbio->bio_flags = bio->bio_flags & BIO_SYNC; 3126 3127 /* 3128 * If the op is asynchronous and an i/o daemon is waiting 3129 * queue the request, wake it up and wait for completion 3130 * otherwise just do it ourselves. 3131 */ 3132 if (bio->bio_flags & BIO_SYNC) { 3133 error = nfs_doio(ap->a_vp, nbio, td); 3134 } else { 3135 nfs_asyncio(ap->a_vp, nbio); 3136 error = 0; 3137 } 3138 lwkt_reltoken(&nmp->nm_token); 3139 3140 return (error); 3141 } 3142 3143 /* 3144 * Mmap a file 3145 * 3146 * NB Currently unsupported. 3147 * 3148 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred) 3149 */ 3150 /* ARGSUSED */ 3151 static int 3152 nfs_mmap(struct vop_mmap_args *ap) 3153 { 3154 /* no token lock required */ 3155 return (EINVAL); 3156 } 3157 3158 /* 3159 * fsync vnode op. Just call nfs_flush() with commit == 1. 3160 * 3161 * nfs_fsync(struct vnode *a_vp, int a_waitfor) 3162 */ 3163 /* ARGSUSED */ 3164 static int 3165 nfs_fsync(struct vop_fsync_args *ap) 3166 { 3167 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3168 int error; 3169 3170 lwkt_gettoken(&nmp->nm_token); 3171 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1); 3172 lwkt_reltoken(&nmp->nm_token); 3173 3174 return error; 3175 } 3176 3177 /* 3178 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be 3179 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains 3180 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is 3181 * set the buffer contains data that has already been written to the server 3182 * and which now needs a commit RPC. 3183 * 3184 * If commit is 0 we only take one pass and only flush buffers containing new 3185 * dirty data. 3186 * 3187 * If commit is 1 we take two passes, issuing a commit RPC in the second 3188 * pass. 3189 * 3190 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required 3191 * to completely flush all pending data. 3192 * 3193 * Note that the RB_SCAN code properly handles the case where the 3194 * callback might block and directly or indirectly (another thread) cause 3195 * the RB tree to change. 3196 */ 3197 3198 #ifndef NFS_COMMITBVECSIZ 3199 #define NFS_COMMITBVECSIZ 16 3200 #endif 3201 3202 struct nfs_flush_info { 3203 enum { NFI_FLUSHNEW, NFI_COMMIT } mode; 3204 struct thread *td; 3205 struct vnode *vp; 3206 int waitfor; 3207 int slpflag; 3208 int slptimeo; 3209 int loops; 3210 struct buf *bvary[NFS_COMMITBVECSIZ]; 3211 int bvsize; 3212 off_t beg_off; 3213 off_t end_off; 3214 }; 3215 3216 static int nfs_flush_bp(struct buf *bp, void *data); 3217 static int nfs_flush_docommit(struct nfs_flush_info *info, int error); 3218 3219 int 3220 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) 3221 { 3222 struct nfsnode *np = VTONFS(vp); 3223 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3224 struct nfs_flush_info info; 3225 int error; 3226 3227 bzero(&info, sizeof(info)); 3228 info.td = td; 3229 info.vp = vp; 3230 info.waitfor = waitfor; 3231 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0; 3232 info.loops = 0; 3233 lwkt_gettoken(&vp->v_token); 3234 3235 do { 3236 /* 3237 * Flush mode 3238 */ 3239 info.mode = NFI_FLUSHNEW; 3240 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3241 nfs_flush_bp, &info); 3242 3243 /* 3244 * Take a second pass if committing and no error occured. 3245 * Clean up any left over collection (whether an error 3246 * occurs or not). 3247 */ 3248 if (commit && error == 0) { 3249 info.mode = NFI_COMMIT; 3250 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3251 nfs_flush_bp, &info); 3252 if (info.bvsize) 3253 error = nfs_flush_docommit(&info, error); 3254 } 3255 3256 /* 3257 * Wait for pending I/O to complete before checking whether 3258 * any further dirty buffers exist. 3259 */ 3260 while (waitfor == MNT_WAIT && 3261 bio_track_active(&vp->v_track_write)) { 3262 error = bio_track_wait(&vp->v_track_write, 3263 info.slpflag, info.slptimeo); 3264 if (error) { 3265 /* 3266 * We have to be able to break out if this 3267 * is an 'intr' mount. 3268 */ 3269 if (nfs_sigintr(nmp, NULL, td)) { 3270 error = -EINTR; 3271 break; 3272 } 3273 3274 /* 3275 * Since we do not process pending signals, 3276 * once we get a PCATCH our tsleep() will no 3277 * longer sleep, switch to a fixed timeout 3278 * instead. 3279 */ 3280 if (info.slpflag == PCATCH) { 3281 info.slpflag = 0; 3282 info.slptimeo = 2 * hz; 3283 } 3284 error = 0; 3285 } 3286 } 3287 ++info.loops; 3288 /* 3289 * Loop if we are flushing synchronous as well as committing, 3290 * and dirty buffers are still present. Otherwise we might livelock. 3291 */ 3292 } while (waitfor == MNT_WAIT && commit && 3293 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree)); 3294 3295 /* 3296 * The callbacks have to return a negative error to terminate the 3297 * RB scan. 3298 */ 3299 if (error < 0) 3300 error = -error; 3301 3302 /* 3303 * Deal with any error collection 3304 */ 3305 if (np->n_flag & NWRITEERR) { 3306 error = np->n_error; 3307 np->n_flag &= ~NWRITEERR; 3308 } 3309 lwkt_reltoken(&vp->v_token); 3310 return (error); 3311 } 3312 3313 static 3314 int 3315 nfs_flush_bp(struct buf *bp, void *data) 3316 { 3317 struct nfs_flush_info *info = data; 3318 int lkflags; 3319 int error; 3320 off_t toff; 3321 3322 error = 0; 3323 switch(info->mode) { 3324 case NFI_FLUSHNEW: 3325 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3326 if (error && info->loops && info->waitfor == MNT_WAIT) { 3327 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3328 if (error) { 3329 lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL; 3330 if (info->slpflag & PCATCH) 3331 lkflags |= LK_PCATCH; 3332 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync", 3333 info->slptimeo); 3334 } 3335 } 3336 3337 /* 3338 * Ignore locking errors 3339 */ 3340 if (error) { 3341 error = 0; 3342 break; 3343 } 3344 3345 /* 3346 * The buffer may have changed out from under us, even if 3347 * we did not block (MPSAFE). Check again now that it is 3348 * locked. 3349 */ 3350 if (bp->b_vp == info->vp && 3351 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) { 3352 bremfree(bp); 3353 bawrite(bp); 3354 } else { 3355 BUF_UNLOCK(bp); 3356 } 3357 break; 3358 case NFI_COMMIT: 3359 /* 3360 * Only process buffers in need of a commit which we can 3361 * immediately lock. This may prevent a buffer from being 3362 * committed, but the normal flush loop will block on the 3363 * same buffer so we shouldn't get into an endless loop. 3364 */ 3365 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3366 (B_DELWRI | B_NEEDCOMMIT)) { 3367 break; 3368 } 3369 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 3370 break; 3371 3372 /* 3373 * We must recheck after successfully locking the buffer. 3374 */ 3375 if (bp->b_vp != info->vp || 3376 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3377 (B_DELWRI | B_NEEDCOMMIT)) { 3378 BUF_UNLOCK(bp); 3379 break; 3380 } 3381 3382 /* 3383 * NOTE: storing the bp in the bvary[] basically sets 3384 * it up for a commit operation. 3385 * 3386 * We must call vfs_busy_pages() now so the commit operation 3387 * is interlocked with user modifications to memory mapped 3388 * pages. The b_dirtyoff/b_dirtyend range is not correct 3389 * until after the pages have been busied. 3390 * 3391 * Note: to avoid loopback deadlocks, we do not 3392 * assign b_runningbufspace. 3393 */ 3394 bremfree(bp); 3395 bp->b_cmd = BUF_CMD_WRITE; 3396 vfs_busy_pages(bp->b_vp, bp); 3397 info->bvary[info->bvsize] = bp; 3398 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff; 3399 if (info->bvsize == 0 || toff < info->beg_off) 3400 info->beg_off = toff; 3401 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff); 3402 if (info->bvsize == 0 || toff > info->end_off) 3403 info->end_off = toff; 3404 ++info->bvsize; 3405 if (info->bvsize == NFS_COMMITBVECSIZ) { 3406 error = nfs_flush_docommit(info, 0); 3407 KKASSERT(info->bvsize == 0); 3408 } 3409 } 3410 return (error); 3411 } 3412 3413 static 3414 int 3415 nfs_flush_docommit(struct nfs_flush_info *info, int error) 3416 { 3417 struct vnode *vp; 3418 struct buf *bp; 3419 off_t bytes; 3420 int retv; 3421 int i; 3422 3423 vp = info->vp; 3424 3425 if (info->bvsize > 0) { 3426 /* 3427 * Commit data on the server, as required. Note that 3428 * nfs_commit will use the vnode's cred for the commit. 3429 * The NFSv3 commit RPC is limited to a 32 bit byte count. 3430 */ 3431 bytes = info->end_off - info->beg_off; 3432 if (bytes > 0x40000000) 3433 bytes = 0x40000000; 3434 if (error) { 3435 retv = -error; 3436 } else { 3437 retv = nfs_commitrpc_uio(vp, info->beg_off, 3438 (int)bytes, info->td); 3439 if (retv == NFSERR_STALEWRITEVERF) 3440 nfs_clearcommit(vp->v_mount); 3441 } 3442 3443 /* 3444 * Now, either mark the blocks I/O done or mark the 3445 * blocks dirty, depending on whether the commit 3446 * succeeded. 3447 */ 3448 for (i = 0; i < info->bvsize; ++i) { 3449 bp = info->bvary[i]; 3450 if (retv || (bp->b_flags & B_NEEDCOMMIT) == 0) { 3451 /* 3452 * Either an error or the original 3453 * vfs_busy_pages() cleared B_NEEDCOMMIT 3454 * due to finding new dirty VM pages in 3455 * the buffer. 3456 * 3457 * Leave B_DELWRI intact. 3458 */ 3459 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3460 vfs_unbusy_pages(bp); 3461 bp->b_cmd = BUF_CMD_DONE; 3462 bqrelse(bp); 3463 } else { 3464 /* 3465 * Success, remove B_DELWRI ( bundirty() ). 3466 * 3467 * b_dirtyoff/b_dirtyend seem to be NFS 3468 * specific. We should probably move that 3469 * into bundirty(). XXX 3470 * 3471 * We are faking an I/O write, we have to 3472 * start the transaction in order to 3473 * immediately biodone() it. 3474 */ 3475 bundirty(bp); 3476 bp->b_flags &= ~B_ERROR; 3477 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3478 bp->b_dirtyoff = bp->b_dirtyend = 0; 3479 biodone(&bp->b_bio1); 3480 } 3481 } 3482 info->bvsize = 0; 3483 } 3484 return (error); 3485 } 3486 3487 /* 3488 * NFS advisory byte-level locks. 3489 * Currently unsupported. 3490 * 3491 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, 3492 * int a_flags) 3493 */ 3494 static int 3495 nfs_advlock(struct vop_advlock_args *ap) 3496 { 3497 struct nfsnode *np = VTONFS(ap->a_vp); 3498 3499 /* no token lock currently required */ 3500 /* 3501 * The following kludge is to allow diskless support to work 3502 * until a real NFS lockd is implemented. Basically, just pretend 3503 * that this is a local lock. 3504 */ 3505 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 3506 } 3507 3508 /* 3509 * Print out the contents of an nfsnode. 3510 * 3511 * nfs_print(struct vnode *a_vp) 3512 */ 3513 static int 3514 nfs_print(struct vop_print_args *ap) 3515 { 3516 struct vnode *vp = ap->a_vp; 3517 struct nfsnode *np = VTONFS(vp); 3518 3519 kprintf("tag VT_NFS, fileid %lld fsid 0x%x", 3520 (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid); 3521 if (vp->v_type == VFIFO) 3522 fifo_printinfo(vp); 3523 kprintf("\n"); 3524 return (0); 3525 } 3526 3527 /* 3528 * nfs special file access vnode op. 3529 * 3530 * nfs_laccess(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 3531 */ 3532 static int 3533 nfs_laccess(struct vop_access_args *ap) 3534 { 3535 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3536 struct vattr vattr; 3537 int error; 3538 3539 lwkt_gettoken(&nmp->nm_token); 3540 error = VOP_GETATTR(ap->a_vp, &vattr); 3541 if (error == 0) { 3542 error = vop_helper_access(ap, vattr.va_uid, vattr.va_gid, 3543 vattr.va_mode, 0); 3544 } 3545 lwkt_reltoken(&nmp->nm_token); 3546 3547 return (error); 3548 } 3549 3550 /* 3551 * Read wrapper for fifos. 3552 * 3553 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3554 * struct ucred *a_cred) 3555 */ 3556 static int 3557 nfsfifo_read(struct vop_read_args *ap) 3558 { 3559 struct nfsnode *np = VTONFS(ap->a_vp); 3560 3561 /* no token access required */ 3562 /* 3563 * Set access flag. 3564 */ 3565 np->n_flag |= NACC; 3566 getnanotime(&np->n_atim); 3567 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3568 } 3569 3570 /* 3571 * Write wrapper for fifos. 3572 * 3573 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3574 * struct ucred *a_cred) 3575 */ 3576 static int 3577 nfsfifo_write(struct vop_write_args *ap) 3578 { 3579 struct nfsnode *np = VTONFS(ap->a_vp); 3580 3581 /* no token access required */ 3582 /* 3583 * Set update flag. 3584 */ 3585 np->n_flag |= NUPD; 3586 getnanotime(&np->n_mtim); 3587 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3588 } 3589 3590 /* 3591 * Close wrapper for fifos. 3592 * 3593 * Update the times on the nfsnode then do fifo close. 3594 * 3595 * nfsfifo_close(struct vnode *a_vp, int a_fflag) 3596 */ 3597 static int 3598 nfsfifo_close(struct vop_close_args *ap) 3599 { 3600 struct vnode *vp = ap->a_vp; 3601 struct nfsnode *np = VTONFS(vp); 3602 struct vattr vattr; 3603 struct timespec ts; 3604 3605 /* no token access required */ 3606 3607 if (np->n_flag & (NACC | NUPD)) { 3608 getnanotime(&ts); 3609 if (np->n_flag & NACC) 3610 np->n_atim = ts; 3611 if (np->n_flag & NUPD) 3612 np->n_mtim = ts; 3613 np->n_flag |= NCHG; 3614 if (vp->v_sysref.refcnt == 1 && 3615 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3616 VATTR_NULL(&vattr); 3617 if (np->n_flag & NACC) 3618 vattr.va_atime = np->n_atim; 3619 if (np->n_flag & NUPD) 3620 vattr.va_mtime = np->n_mtim; 3621 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE)); 3622 } 3623 } 3624 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3625 } 3626 3627