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