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