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 lwkt_reltoken(&nmp->nm_token); 546 return (error); 547 } 548 nfs_invaldir(vp); 549 } 550 } 551 error = VOP_GETATTR(vp, &vattr); 552 if (error) { 553 lwkt_reltoken(&nmp->nm_token); 554 return (error); 555 } 556 if (np->n_flag & NRMODIFIED) { 557 if (vp->v_type == VDIR) 558 nfs_invaldir(vp); 559 error = nfs_vinvalbuf(vp, V_SAVE, 1); 560 if (error == EINTR) { 561 lwkt_reltoken(&nmp->nm_token); 562 return (error); 563 } 564 np->n_flag &= ~NRMODIFIED; 565 } 566 error = vop_stdopen(ap); 567 lwkt_reltoken(&nmp->nm_token); 568 569 return error; 570 } 571 572 /* 573 * nfs close vnode op 574 * What an NFS client should do upon close after writing is a debatable issue. 575 * Most NFS clients push delayed writes to the server upon close, basically for 576 * two reasons: 577 * 1 - So that any write errors may be reported back to the client process 578 * doing the close system call. By far the two most likely errors are 579 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 580 * 2 - To put a worst case upper bound on cache inconsistency between 581 * multiple clients for the file. 582 * There is also a consistency problem for Version 2 of the protocol w.r.t. 583 * not being able to tell if other clients are writing a file concurrently, 584 * since there is no way of knowing if the changed modify time in the reply 585 * is only due to the write for this client. 586 * (NFS Version 3 provides weak cache consistency data in the reply that 587 * should be sufficient to detect and handle this case.) 588 * 589 * The current code does the following: 590 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 591 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 592 * or commit them (this satisfies 1 and 2 except for the 593 * case where the server crashes after this close but 594 * before the commit RPC, which is felt to be "good 595 * enough". Changing the last argument to nfs_flush() to 596 * a 1 would force a commit operation, if it is felt a 597 * commit is necessary now. 598 * for NQNFS - do nothing now, since 2 is dealt with via leases and 599 * 1 should be dealt with via an fsync() system call for 600 * cases where write errors are important. 601 * 602 * nfs_close(struct vnode *a_vp, int a_fflag) 603 */ 604 /* ARGSUSED */ 605 static int 606 nfs_close(struct vop_close_args *ap) 607 { 608 struct vnode *vp = ap->a_vp; 609 struct nfsnode *np = VTONFS(vp); 610 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 611 int error = 0; 612 thread_t td = curthread; 613 614 vn_lock(vp, LK_UPGRADE | LK_RETRY); /* XXX */ 615 lwkt_gettoken(&nmp->nm_token); 616 617 if (vp->v_type == VREG) { 618 if (np->n_flag & NLMODIFIED) { 619 if (NFS_ISV3(vp)) { 620 /* 621 * Under NFSv3 we have dirty buffers to dispose of. We 622 * must flush them to the NFS server. We have the option 623 * of waiting all the way through the commit rpc or just 624 * waiting for the initial write. The default is to only 625 * wait through the initial write so the data is in the 626 * server's cache, which is roughly similar to the state 627 * a standard disk subsystem leaves the file in on close(). 628 * 629 * We cannot clear the NLMODIFIED bit in np->n_flag due to 630 * potential races with other processes, and certainly 631 * cannot clear it if we don't commit. 632 */ 633 int cm = nfsv3_commit_on_close ? 1 : 0; 634 error = nfs_flush(vp, MNT_WAIT, td, cm); 635 /* np->n_flag &= ~NLMODIFIED; */ 636 } else { 637 error = nfs_vinvalbuf(vp, V_SAVE, 1); 638 } 639 np->n_attrstamp = 0; 640 } 641 if (np->n_flag & NWRITEERR) { 642 np->n_flag &= ~NWRITEERR; 643 error = np->n_error; 644 } 645 } 646 vop_stdclose(ap); 647 lwkt_reltoken(&nmp->nm_token); 648 649 return (error); 650 } 651 652 /* 653 * nfs getattr call from vfs. 654 * 655 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 656 */ 657 static int 658 nfs_getattr(struct vop_getattr_args *ap) 659 { 660 struct vnode *vp = ap->a_vp; 661 struct nfsnode *np = VTONFS(vp); 662 struct nfsmount *nmp; 663 int error = 0; 664 thread_t td = curthread; 665 struct nfsm_info info; 666 667 info.mrep = NULL; 668 info.v3 = NFS_ISV3(vp); 669 nmp = VFSTONFS(vp->v_mount); 670 671 lwkt_gettoken(&nmp->nm_token); 672 673 /* 674 * Update local times for special files. 675 */ 676 if (np->n_flag & (NACC | NUPD)) 677 np->n_flag |= NCHG; 678 /* 679 * First look in the cache. 680 */ 681 if (nfs_getattrcache(vp, ap->a_vap) == 0) 682 goto done; 683 684 if (info.v3 && nfsaccess_cache_timeout > 0) { 685 nfsstats.accesscache_misses++; 686 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK)); 687 if (nfs_getattrcache(vp, ap->a_vap) == 0) 688 goto done; 689 } 690 691 nfsstats.rpccnt[NFSPROC_GETATTR]++; 692 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3)); 693 ERROROUT(nfsm_fhtom(&info, vp)); 694 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td, 695 nfs_vpcred(vp, ND_CHECK), &error)); 696 if (error == 0) { 697 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap)); 698 } 699 m_freem(info.mrep); 700 info.mrep = NULL; 701 done: 702 /* 703 * NFS doesn't support chflags flags. If the nfs mount was 704 * made -o cache set the UF_CACHE bit for swapcache. 705 */ 706 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT)) 707 ap->a_vap->va_flags |= UF_CACHE; 708 nfsmout: 709 lwkt_reltoken(&nmp->nm_token); 710 return (error); 711 } 712 713 /* 714 * nfs setattr call. 715 * 716 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred) 717 */ 718 static int 719 nfs_setattr(struct vop_setattr_args *ap) 720 { 721 struct vnode *vp = ap->a_vp; 722 struct nfsnode *np = VTONFS(vp); 723 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 724 struct vattr *vap = ap->a_vap; 725 int error = 0; 726 off_t tsize; 727 thread_t td = curthread; 728 729 #ifndef nolint 730 tsize = (off_t)0; 731 #endif 732 /* 733 * Setting of flags is not supported. 734 */ 735 if (vap->va_flags != VNOVAL) 736 return (EOPNOTSUPP); 737 738 /* 739 * Disallow write attempts if the filesystem is mounted read-only. 740 */ 741 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 742 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 743 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 744 (vp->v_mount->mnt_flag & MNT_RDONLY)) 745 return (EROFS); 746 747 lwkt_gettoken(&nmp->nm_token); 748 749 if (vap->va_size != VNOVAL) { 750 /* 751 * truncation requested 752 */ 753 switch (vp->v_type) { 754 case VDIR: 755 lwkt_reltoken(&nmp->nm_token); 756 return (EISDIR); 757 case VCHR: 758 case VBLK: 759 case VSOCK: 760 case VFIFO: 761 if (vap->va_mtime.tv_sec == VNOVAL && 762 vap->va_atime.tv_sec == VNOVAL && 763 vap->va_mode == (mode_t)VNOVAL && 764 vap->va_uid == (uid_t)VNOVAL && 765 vap->va_gid == (gid_t)VNOVAL) { 766 lwkt_reltoken(&nmp->nm_token); 767 return (0); 768 } 769 vap->va_size = VNOVAL; 770 break; 771 default: 772 /* 773 * Disallow write attempts if the filesystem is 774 * mounted read-only. 775 */ 776 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 777 lwkt_reltoken(&nmp->nm_token); 778 return (EROFS); 779 } 780 781 tsize = np->n_size; 782 again: 783 error = nfs_meta_setsize(vp, td, vap->va_size, 0); 784 785 #if 0 786 if (np->n_flag & NLMODIFIED) { 787 if (vap->va_size == 0) 788 error = nfs_vinvalbuf(vp, 0, 1); 789 else 790 error = nfs_vinvalbuf(vp, V_SAVE, 1); 791 } 792 #endif 793 /* 794 * note: this loop case almost always happens at 795 * least once per truncation. 796 */ 797 if (error == 0 && np->n_size != vap->va_size) 798 goto again; 799 np->n_vattr.va_size = vap->va_size; 800 break; 801 } 802 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) { 803 /* 804 * What to do. If we are modifying the mtime we lose 805 * mtime detection of changes made by the server or other 806 * clients. But programs like rsync/rdist/cpdup are going 807 * to call utimes a lot. We don't want to piecemeal sync. 808 * 809 * For now sync if any prior remote changes were detected, 810 * but allow us to lose track of remote changes made during 811 * the utimes operation. 812 */ 813 if (np->n_flag & NRMODIFIED) 814 error = nfs_vinvalbuf(vp, V_SAVE, 1); 815 if (error == EINTR) { 816 lwkt_reltoken(&nmp->nm_token); 817 return (error); 818 } 819 if (error == 0) { 820 if (vap->va_mtime.tv_sec != VNOVAL) { 821 np->n_mtime = vap->va_mtime.tv_sec; 822 } 823 } 824 } 825 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 826 827 /* 828 * Sanity check if a truncation was issued. This should only occur 829 * if multiple processes are racing on the same file. 830 */ 831 if (error == 0 && vap->va_size != VNOVAL && 832 np->n_size != vap->va_size) { 833 kprintf("NFS ftruncate: server disagrees on the file size: " 834 "%jd/%jd/%jd\n", 835 (intmax_t)tsize, 836 (intmax_t)vap->va_size, 837 (intmax_t)np->n_size); 838 goto again; 839 } 840 if (error && vap->va_size != VNOVAL) { 841 np->n_size = np->n_vattr.va_size = tsize; 842 nfs_meta_setsize(vp, td, np->n_size, 0); 843 } 844 lwkt_reltoken(&nmp->nm_token); 845 846 return (error); 847 } 848 849 /* 850 * Do an nfs setattr rpc. 851 */ 852 static int 853 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, 854 struct ucred *cred, struct thread *td) 855 { 856 struct nfsv2_sattr *sp; 857 struct nfsnode *np = VTONFS(vp); 858 u_int32_t *tl; 859 int error = 0, wccflag = NFSV3_WCCRATTR; 860 struct nfsm_info info; 861 862 info.mrep = NULL; 863 info.v3 = NFS_ISV3(vp); 864 865 nfsstats.rpccnt[NFSPROC_SETATTR]++; 866 nfsm_reqhead(&info, vp, NFSPROC_SETATTR, 867 NFSX_FH(info.v3) + NFSX_SATTR(info.v3)); 868 ERROROUT(nfsm_fhtom(&info, vp)); 869 if (info.v3) { 870 nfsm_v3attrbuild(&info, vap, TRUE); 871 tl = nfsm_build(&info, NFSX_UNSIGNED); 872 *tl = nfs_false; 873 } else { 874 sp = nfsm_build(&info, NFSX_V2SATTR); 875 if (vap->va_mode == (mode_t)VNOVAL) 876 sp->sa_mode = nfs_xdrneg1; 877 else 878 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 879 if (vap->va_uid == (uid_t)VNOVAL) 880 sp->sa_uid = nfs_xdrneg1; 881 else 882 sp->sa_uid = txdr_unsigned(vap->va_uid); 883 if (vap->va_gid == (gid_t)VNOVAL) 884 sp->sa_gid = nfs_xdrneg1; 885 else 886 sp->sa_gid = txdr_unsigned(vap->va_gid); 887 sp->sa_size = txdr_unsigned(vap->va_size); 888 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 889 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 890 } 891 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error)); 892 if (info.v3) { 893 np->n_modestamp = 0; 894 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 895 } else { 896 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 897 } 898 m_freem(info.mrep); 899 info.mrep = NULL; 900 nfsmout: 901 return (error); 902 } 903 904 static 905 void 906 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout) 907 { 908 if (nctimeout == 0) 909 nctimeout = 1; 910 else 911 nctimeout *= hz; 912 cache_setvp(nch, vp); 913 cache_settimeout(nch, nctimeout); 914 } 915 916 /* 917 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove 918 * nfs_lookup() until all remaining new api calls are implemented. 919 * 920 * Resolve a namecache entry. This function is passed a locked ncp and 921 * must call nfs_cache_setvp() on it as appropriate to resolve the entry. 922 */ 923 static int 924 nfs_nresolve(struct vop_nresolve_args *ap) 925 { 926 struct thread *td = curthread; 927 struct namecache *ncp; 928 struct nfsmount *nmp; 929 struct nfsnode *np; 930 struct vnode *dvp; 931 struct vnode *nvp; 932 nfsfh_t *fhp; 933 int attrflag; 934 int fhsize; 935 int error; 936 int tmp_error; 937 int len; 938 struct nfsm_info info; 939 940 dvp = ap->a_dvp; 941 nmp = VFSTONFS(dvp->v_mount); 942 943 lwkt_gettoken(&nmp->nm_token); 944 945 if ((error = vget(dvp, LK_SHARED)) != 0) { 946 lwkt_reltoken(&nmp->nm_token); 947 return (error); 948 } 949 950 info.mrep = NULL; 951 info.v3 = NFS_ISV3(dvp); 952 953 nvp = NULL; 954 nfsstats.lookupcache_misses++; 955 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 956 ncp = ap->a_nch->ncp; 957 len = ncp->nc_nlen; 958 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 959 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 960 ERROROUT(nfsm_fhtom(&info, dvp)); 961 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN)); 962 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, 963 ap->a_cred, &error)); 964 if (error) { 965 /* 966 * Cache negatve lookups to reduce NFS traffic, but use 967 * a fast timeout. Otherwise use a timeout of 1 tick. 968 * XXX we should add a namecache flag for no-caching 969 * to uncache the negative hit as soon as possible, but 970 * we cannot simply destroy the entry because it is used 971 * as a placeholder by the caller. 972 * 973 * The refactored nfs code will overwrite a non-zero error 974 * with 0 when we use ERROROUT(), so don't here. 975 */ 976 if (error == ENOENT) 977 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout); 978 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 979 NFS_LATTR_NOSHRINK); 980 if (tmp_error) { 981 error = tmp_error; 982 goto nfsmout; 983 } 984 m_freem(info.mrep); 985 info.mrep = NULL; 986 goto nfsmout; 987 } 988 989 /* 990 * Success, get the file handle, do various checks, and load 991 * post-operation data from the reply packet. Theoretically 992 * we should never be looking up "." so, theoretically, we 993 * should never get the same file handle as our directory. But 994 * we check anyway. XXX 995 * 996 * Note that no timeout is set for the positive cache hit. We 997 * assume, theoretically, that ESTALE returns will be dealt with 998 * properly to handle NFS races and in anycase we cannot depend 999 * on a timeout to deal with NFS open/create/excl issues so instead 1000 * of a bad hack here the rest of the NFS client code needs to do 1001 * the right thing. 1002 */ 1003 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1004 1005 np = VTONFS(dvp); 1006 if (NFS_CMPFH(np, fhp, fhsize)) { 1007 vref(dvp); 1008 nvp = dvp; 1009 } else { 1010 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, NULL); 1011 if (error) { 1012 m_freem(info.mrep); 1013 info.mrep = NULL; 1014 vput(dvp); 1015 lwkt_reltoken(&nmp->nm_token); 1016 return (error); 1017 } 1018 nvp = NFSTOV(np); 1019 } 1020 if (info.v3) { 1021 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag, 1022 NFS_LATTR_NOSHRINK)); 1023 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1024 NFS_LATTR_NOSHRINK)); 1025 } else { 1026 ERROROUT(nfsm_loadattr(&info, nvp, NULL)); 1027 } 1028 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout); 1029 m_freem(info.mrep); 1030 info.mrep = NULL; 1031 nfsmout: 1032 lwkt_reltoken(&nmp->nm_token); 1033 vput(dvp); 1034 if (nvp) { 1035 if (nvp == dvp) 1036 vrele(nvp); 1037 else 1038 vput(nvp); 1039 } 1040 return (error); 1041 } 1042 1043 /* 1044 * 'cached' nfs directory lookup 1045 * 1046 * NOTE: cannot be removed until NFS implements all the new n*() API calls. 1047 * 1048 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 1049 * struct componentname *a_cnp) 1050 */ 1051 static int 1052 nfs_lookup(struct vop_old_lookup_args *ap) 1053 { 1054 struct componentname *cnp = ap->a_cnp; 1055 struct vnode *dvp = ap->a_dvp; 1056 struct vnode **vpp = ap->a_vpp; 1057 int flags = cnp->cn_flags; 1058 struct vnode *newvp; 1059 struct vnode *notvp; 1060 struct nfsmount *nmp; 1061 long len; 1062 nfsfh_t *fhp; 1063 struct nfsnode *np; 1064 int lockparent, wantparent, attrflag, fhsize; 1065 int error; 1066 int tmp_error; 1067 struct nfsm_info info; 1068 1069 info.mrep = NULL; 1070 info.v3 = NFS_ISV3(dvp); 1071 error = 0; 1072 1073 notvp = (cnp->cn_flags & CNP_NOTVP) ? cnp->cn_notvp : NULL; 1074 1075 /* 1076 * Read-only mount check and directory check. 1077 */ 1078 *vpp = NULLVP; 1079 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) && 1080 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) 1081 return (EROFS); 1082 1083 if (dvp->v_type != VDIR) 1084 return (ENOTDIR); 1085 1086 /* 1087 * Look it up in the cache. Note that ENOENT is only returned if we 1088 * previously entered a negative hit (see later on). The additional 1089 * nfsneg_cache_timeout check causes previously cached results to 1090 * be instantly ignored if the negative caching is turned off. 1091 */ 1092 lockparent = flags & CNP_LOCKPARENT; 1093 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); 1094 nmp = VFSTONFS(dvp->v_mount); 1095 np = VTONFS(dvp); 1096 1097 lwkt_gettoken(&nmp->nm_token); 1098 1099 /* 1100 * Go to the wire. 1101 */ 1102 error = 0; 1103 newvp = NULLVP; 1104 nfsstats.lookupcache_misses++; 1105 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1106 len = cnp->cn_namelen; 1107 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 1108 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 1109 ERROROUT(nfsm_fhtom(&info, dvp)); 1110 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 1111 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td, 1112 cnp->cn_cred, &error)); 1113 if (error) { 1114 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, 1115 NFS_LATTR_NOSHRINK); 1116 if (tmp_error) { 1117 error = tmp_error; 1118 goto nfsmout; 1119 } 1120 1121 m_freem(info.mrep); 1122 info.mrep = NULL; 1123 goto nfsmout; 1124 } 1125 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 1126 1127 /* 1128 * Handle RENAME case... 1129 */ 1130 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) { 1131 if (NFS_CMPFH(np, fhp, fhsize)) { 1132 m_freem(info.mrep); 1133 info.mrep = NULL; 1134 lwkt_reltoken(&nmp->nm_token); 1135 return (EISDIR); 1136 } 1137 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp); 1138 if (error) { 1139 m_freem(info.mrep); 1140 info.mrep = NULL; 1141 lwkt_reltoken(&nmp->nm_token); 1142 return (error); 1143 } 1144 newvp = NFSTOV(np); 1145 if (info.v3) { 1146 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1147 NFS_LATTR_NOSHRINK)); 1148 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1149 NFS_LATTR_NOSHRINK)); 1150 } else { 1151 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1152 } 1153 *vpp = newvp; 1154 m_freem(info.mrep); 1155 info.mrep = NULL; 1156 if (!lockparent) { 1157 vn_unlock(dvp); 1158 cnp->cn_flags |= CNP_PDIRUNLOCK; 1159 } 1160 lwkt_reltoken(&nmp->nm_token); 1161 return (0); 1162 } 1163 1164 if (flags & CNP_ISDOTDOT) { 1165 vn_unlock(dvp); 1166 cnp->cn_flags |= CNP_PDIRUNLOCK; 1167 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp); 1168 if (error) { 1169 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1170 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 1171 lwkt_reltoken(&nmp->nm_token); 1172 return (error); /* NOTE: return error from nget */ 1173 } 1174 newvp = NFSTOV(np); 1175 if (lockparent) { 1176 error = vn_lock(dvp, LK_EXCLUSIVE | LK_FAILRECLAIM); 1177 if (error) { 1178 vput(newvp); 1179 lwkt_reltoken(&nmp->nm_token); 1180 return (error); 1181 } 1182 cnp->cn_flags |= CNP_PDIRUNLOCK; 1183 } 1184 } else if (NFS_CMPFH(np, fhp, fhsize)) { 1185 vref(dvp); 1186 newvp = dvp; 1187 } else { 1188 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp); 1189 if (error) { 1190 m_freem(info.mrep); 1191 info.mrep = NULL; 1192 lwkt_reltoken(&nmp->nm_token); 1193 return (error); 1194 } 1195 if (!lockparent) { 1196 vn_unlock(dvp); 1197 cnp->cn_flags |= CNP_PDIRUNLOCK; 1198 } 1199 newvp = NFSTOV(np); 1200 } 1201 if (info.v3) { 1202 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 1203 NFS_LATTR_NOSHRINK)); 1204 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, 1205 NFS_LATTR_NOSHRINK)); 1206 } else { 1207 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 1208 } 1209 #if 0 1210 /* XXX MOVE TO nfs_nremove() */ 1211 if ((cnp->cn_flags & CNP_MAKEENTRY) && 1212 cnp->cn_nameiop != NAMEI_DELETE) { 1213 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */ 1214 } 1215 #endif 1216 *vpp = newvp; 1217 m_freem(info.mrep); 1218 info.mrep = NULL; 1219 nfsmout: 1220 if (error) { 1221 if (newvp != NULLVP) { 1222 vrele(newvp); 1223 *vpp = NULLVP; 1224 } 1225 if ((cnp->cn_nameiop == NAMEI_CREATE || 1226 cnp->cn_nameiop == NAMEI_RENAME) && 1227 error == ENOENT) { 1228 if (!lockparent) { 1229 vn_unlock(dvp); 1230 cnp->cn_flags |= CNP_PDIRUNLOCK; 1231 } 1232 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1233 error = EROFS; 1234 else 1235 error = EJUSTRETURN; 1236 } 1237 } 1238 lwkt_reltoken(&nmp->nm_token); 1239 return (error); 1240 } 1241 1242 /* 1243 * nfs read call. 1244 * Just call nfs_bioread() to do the work. 1245 * 1246 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 1247 * struct ucred *a_cred) 1248 */ 1249 static int 1250 nfs_read(struct vop_read_args *ap) 1251 { 1252 struct vnode *vp = ap->a_vp; 1253 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1254 int error; 1255 1256 lwkt_gettoken(&nmp->nm_token); 1257 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag); 1258 lwkt_reltoken(&nmp->nm_token); 1259 1260 return error; 1261 } 1262 1263 /* 1264 * nfs readlink call 1265 * 1266 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 1267 */ 1268 static int 1269 nfs_readlink(struct vop_readlink_args *ap) 1270 { 1271 struct vnode *vp = ap->a_vp; 1272 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1273 int error; 1274 1275 if (vp->v_type != VLNK) 1276 return (EINVAL); 1277 1278 lwkt_gettoken(&nmp->nm_token); 1279 error = nfs_bioread(vp, ap->a_uio, 0); 1280 lwkt_reltoken(&nmp->nm_token); 1281 1282 return error; 1283 } 1284 1285 /* 1286 * Do a readlink rpc. 1287 * Called by nfs_doio() from below the buffer cache. 1288 */ 1289 int 1290 nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop) 1291 { 1292 int error = 0, len, attrflag; 1293 struct nfsm_info info; 1294 1295 info.mrep = NULL; 1296 info.v3 = NFS_ISV3(vp); 1297 1298 nfsstats.rpccnt[NFSPROC_READLINK]++; 1299 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3)); 1300 ERROROUT(nfsm_fhtom(&info, vp)); 1301 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td, 1302 nfs_vpcred(vp, ND_CHECK), &error)); 1303 if (info.v3) { 1304 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1305 NFS_LATTR_NOSHRINK)); 1306 } 1307 if (!error) { 1308 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN)); 1309 if (len == NFS_MAXPATHLEN) { 1310 struct nfsnode *np = VTONFS(vp); 1311 if (np->n_size && np->n_size < NFS_MAXPATHLEN) 1312 len = np->n_size; 1313 } 1314 ERROROUT(nfsm_mtouio(&info, uiop, len)); 1315 } 1316 m_freem(info.mrep); 1317 info.mrep = NULL; 1318 nfsmout: 1319 return (error); 1320 } 1321 1322 /* 1323 * nfs synchronous read rpc using UIO 1324 */ 1325 int 1326 nfs_readrpc_uio(struct vnode *vp, struct uio *uiop) 1327 { 1328 u_int32_t *tl; 1329 struct nfsmount *nmp; 1330 int error = 0, len, retlen, tsiz, eof, attrflag; 1331 struct nfsm_info info; 1332 off_t tmp_off; 1333 1334 info.mrep = NULL; 1335 info.v3 = NFS_ISV3(vp); 1336 1337 #ifndef nolint 1338 eof = 0; 1339 #endif 1340 nmp = VFSTONFS(vp->v_mount); 1341 1342 tsiz = uiop->uio_resid; 1343 tmp_off = uiop->uio_offset + tsiz; 1344 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) 1345 return (EFBIG); 1346 tmp_off = uiop->uio_offset; 1347 while (tsiz > 0) { 1348 nfsstats.rpccnt[NFSPROC_READ]++; 1349 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1350 nfsm_reqhead(&info, vp, NFSPROC_READ, 1351 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3); 1352 ERROROUT(nfsm_fhtom(&info, vp)); 1353 tl = nfsm_build(&info, NFSX_UNSIGNED * 3); 1354 if (info.v3) { 1355 txdr_hyper(uiop->uio_offset, tl); 1356 *(tl + 2) = txdr_unsigned(len); 1357 } else { 1358 *tl++ = txdr_unsigned(uiop->uio_offset); 1359 *tl++ = txdr_unsigned(len); 1360 *tl = 0; 1361 } 1362 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td, 1363 nfs_vpcred(vp, ND_READ), &error)); 1364 if (info.v3) { 1365 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 1366 NFS_LATTR_NOSHRINK)); 1367 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 1368 eof = fxdr_unsigned(int, *(tl + 1)); 1369 } else { 1370 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1371 } 1372 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len)); 1373 ERROROUT(nfsm_mtouio(&info, uiop, retlen)); 1374 m_freem(info.mrep); 1375 info.mrep = NULL; 1376 1377 /* 1378 * Handle short-read from server (NFSv3). If EOF is not 1379 * flagged (and no error occurred), but retlen is less 1380 * then the request size, we must zero-fill the remainder. 1381 */ 1382 if (retlen < len && info.v3 && eof == 0) { 1383 ERROROUT(uiomovez(len - retlen, uiop)); 1384 retlen = len; 1385 } 1386 tsiz -= retlen; 1387 1388 /* 1389 * Terminate loop on EOF or zero-length read. 1390 * 1391 * For NFSv2 a short-read indicates EOF, not zero-fill, 1392 * and also terminates the loop. 1393 */ 1394 if (info.v3) { 1395 if (eof || retlen == 0) 1396 tsiz = 0; 1397 } else if (retlen < len) { 1398 tsiz = 0; 1399 } 1400 } 1401 nfsmout: 1402 return (error); 1403 } 1404 1405 /* 1406 * nfs write call 1407 */ 1408 int 1409 nfs_writerpc_uio(struct vnode *vp, struct uio *uiop, 1410 int *iomode, int *must_commit) 1411 { 1412 u_int32_t *tl; 1413 int32_t backup; 1414 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1415 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1416 int committed = NFSV3WRITE_FILESYNC; 1417 struct nfsm_info info; 1418 1419 info.mrep = NULL; 1420 info.v3 = NFS_ISV3(vp); 1421 1422 #ifndef DIAGNOSTIC 1423 if (uiop->uio_iovcnt != 1) 1424 panic("nfs: writerpc iovcnt > 1"); 1425 #endif 1426 *must_commit = 0; 1427 tsiz = uiop->uio_resid; 1428 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1429 return (EFBIG); 1430 while (tsiz > 0) { 1431 nfsstats.rpccnt[NFSPROC_WRITE]++; 1432 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1433 nfsm_reqhead(&info, vp, NFSPROC_WRITE, 1434 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED + 1435 nfsm_rndup(len)); 1436 ERROROUT(nfsm_fhtom(&info, vp)); 1437 if (info.v3) { 1438 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 1439 txdr_hyper(uiop->uio_offset, tl); 1440 tl += 2; 1441 *tl++ = txdr_unsigned(len); 1442 *tl++ = txdr_unsigned(*iomode); 1443 *tl = txdr_unsigned(len); 1444 } else { 1445 u_int32_t x; 1446 1447 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); 1448 /* Set both "begin" and "current" to non-garbage. */ 1449 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1450 *tl++ = x; /* "begin offset" */ 1451 *tl++ = x; /* "current offset" */ 1452 x = txdr_unsigned(len); 1453 *tl++ = x; /* total to this offset */ 1454 *tl = x; /* size of this write */ 1455 } 1456 ERROROUT(nfsm_uiotom(&info, uiop, len)); 1457 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td, 1458 nfs_vpcred(vp, ND_WRITE), &error)); 1459 if (info.v3) { 1460 /* 1461 * The write RPC returns a before and after mtime. The 1462 * nfsm_wcc_data() macro checks the before n_mtime 1463 * against the before time and stores the after time 1464 * in the nfsnode's cached vattr and n_mtime field. 1465 * The NRMODIFIED bit will be set if the before 1466 * time did not match the original mtime. 1467 */ 1468 wccflag = NFSV3_WCCCHK; 1469 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 1470 if (error == 0) { 1471 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF)); 1472 rlen = fxdr_unsigned(int, *tl++); 1473 if (rlen == 0) { 1474 error = NFSERR_IO; 1475 m_freem(info.mrep); 1476 info.mrep = NULL; 1477 break; 1478 } else if (rlen < len) { 1479 backup = len - rlen; 1480 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup; 1481 uiop->uio_iov->iov_len += backup; 1482 uiop->uio_offset -= backup; 1483 uiop->uio_resid += backup; 1484 len = rlen; 1485 } 1486 commit = fxdr_unsigned(int, *tl++); 1487 1488 /* 1489 * Return the lowest committment level 1490 * obtained by any of the RPCs. 1491 */ 1492 if (committed == NFSV3WRITE_FILESYNC) 1493 committed = commit; 1494 else if (committed == NFSV3WRITE_DATASYNC && 1495 commit == NFSV3WRITE_UNSTABLE) 1496 committed = commit; 1497 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ 1498 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1499 NFSX_V3WRITEVERF); 1500 nmp->nm_state |= NFSSTA_HASWRITEVERF; 1501 } else if (bcmp((caddr_t)tl, 1502 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1503 *must_commit = 1; 1504 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1505 NFSX_V3WRITEVERF); 1506 } 1507 } 1508 } else { 1509 ERROROUT(nfsm_loadattr(&info, vp, NULL)); 1510 } 1511 m_freem(info.mrep); 1512 info.mrep = NULL; 1513 if (error) 1514 break; 1515 tsiz -= len; 1516 } 1517 nfsmout: 1518 if (vp->v_mount->mnt_flag & MNT_ASYNC) 1519 committed = NFSV3WRITE_FILESYNC; 1520 *iomode = committed; 1521 if (error) 1522 uiop->uio_resid = tsiz; 1523 return (error); 1524 } 1525 1526 /* 1527 * nfs mknod rpc 1528 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1529 * mode set to specify the file type and the size field for rdev. 1530 */ 1531 static int 1532 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1533 struct vattr *vap) 1534 { 1535 struct nfsv2_sattr *sp; 1536 u_int32_t *tl; 1537 struct vnode *newvp = NULL; 1538 struct nfsnode *np = NULL; 1539 struct vattr vattr; 1540 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1541 int rmajor, rminor; 1542 struct nfsm_info info; 1543 1544 info.mrep = NULL; 1545 info.v3 = NFS_ISV3(dvp); 1546 1547 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1548 rmajor = txdr_unsigned(vap->va_rmajor); 1549 rminor = txdr_unsigned(vap->va_rminor); 1550 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) { 1551 rmajor = nfs_xdrneg1; 1552 rminor = nfs_xdrneg1; 1553 } else { 1554 return (EOPNOTSUPP); 1555 } 1556 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1557 return (error); 1558 } 1559 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1560 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD, 1561 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED + 1562 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1563 ERROROUT(nfsm_fhtom(&info, dvp)); 1564 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1565 NFS_MAXNAMLEN)); 1566 if (info.v3) { 1567 tl = nfsm_build(&info, NFSX_UNSIGNED); 1568 *tl++ = vtonfsv3_type(vap->va_type); 1569 nfsm_v3attrbuild(&info, vap, FALSE); 1570 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1571 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 1572 *tl++ = txdr_unsigned(vap->va_rmajor); 1573 *tl = txdr_unsigned(vap->va_rminor); 1574 } 1575 } else { 1576 sp = nfsm_build(&info, NFSX_V2SATTR); 1577 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1578 sp->sa_uid = nfs_xdrneg1; 1579 sp->sa_gid = nfs_xdrneg1; 1580 sp->sa_size = makeudev(rmajor, rminor); 1581 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1582 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1583 } 1584 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td, 1585 cnp->cn_cred, &error)); 1586 if (!error) { 1587 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1588 if (!gotvp) { 1589 if (newvp) { 1590 vput(newvp); 1591 newvp = NULL; 1592 } 1593 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1594 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1595 if (!error) 1596 newvp = NFSTOV(np); 1597 } 1598 } 1599 if (info.v3) { 1600 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1601 } 1602 m_freem(info.mrep); 1603 info.mrep = NULL; 1604 nfsmout: 1605 if (error) { 1606 if (newvp) 1607 vput(newvp); 1608 } else { 1609 *vpp = newvp; 1610 } 1611 VTONFS(dvp)->n_flag |= NLMODIFIED; 1612 if (!wccflag) 1613 VTONFS(dvp)->n_attrstamp = 0; 1614 return (error); 1615 } 1616 1617 /* 1618 * nfs mknod vop 1619 * just call nfs_mknodrpc() to do the work. 1620 * 1621 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 1622 * struct componentname *a_cnp, struct vattr *a_vap) 1623 */ 1624 /* ARGSUSED */ 1625 static int 1626 nfs_mknod(struct vop_old_mknod_args *ap) 1627 { 1628 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount); 1629 int error; 1630 1631 lwkt_gettoken(&nmp->nm_token); 1632 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1633 lwkt_reltoken(&nmp->nm_token); 1634 1635 return error; 1636 } 1637 1638 static u_long create_verf; 1639 /* 1640 * nfs file create call 1641 * 1642 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 1643 * struct componentname *a_cnp, struct vattr *a_vap) 1644 */ 1645 static int 1646 nfs_create(struct vop_old_create_args *ap) 1647 { 1648 struct vnode *dvp = ap->a_dvp; 1649 struct vattr *vap = ap->a_vap; 1650 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1651 struct componentname *cnp = ap->a_cnp; 1652 struct nfsv2_sattr *sp; 1653 u_int32_t *tl; 1654 struct nfsnode *np = NULL; 1655 struct vnode *newvp = NULL; 1656 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1657 struct vattr vattr; 1658 struct nfsm_info info; 1659 1660 info.mrep = NULL; 1661 info.v3 = NFS_ISV3(dvp); 1662 lwkt_gettoken(&nmp->nm_token); 1663 1664 /* 1665 * Oops, not for me.. 1666 */ 1667 if (vap->va_type == VSOCK) { 1668 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap); 1669 lwkt_reltoken(&nmp->nm_token); 1670 return error; 1671 } 1672 1673 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 1674 lwkt_reltoken(&nmp->nm_token); 1675 return (error); 1676 } 1677 if (vap->va_vaflags & VA_EXCLUSIVE) 1678 fmode |= O_EXCL; 1679 again: 1680 nfsstats.rpccnt[NFSPROC_CREATE]++; 1681 nfsm_reqhead(&info, dvp, NFSPROC_CREATE, 1682 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED + 1683 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); 1684 ERROROUT(nfsm_fhtom(&info, dvp)); 1685 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 1686 NFS_MAXNAMLEN)); 1687 if (info.v3) { 1688 tl = nfsm_build(&info, NFSX_UNSIGNED); 1689 if (fmode & O_EXCL) { 1690 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1691 tl = nfsm_build(&info, NFSX_V3CREATEVERF); 1692 #ifdef INET 1693 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) 1694 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr; 1695 else 1696 #endif 1697 *tl++ = create_verf; 1698 *tl = ++create_verf; 1699 } else { 1700 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1701 nfsm_v3attrbuild(&info, vap, FALSE); 1702 } 1703 } else { 1704 sp = nfsm_build(&info, NFSX_V2SATTR); 1705 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1706 sp->sa_uid = nfs_xdrneg1; 1707 sp->sa_gid = nfs_xdrneg1; 1708 sp->sa_size = 0; 1709 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1710 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1711 } 1712 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td, 1713 cnp->cn_cred, &error)); 1714 if (error == 0) { 1715 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 1716 if (!gotvp) { 1717 if (newvp) { 1718 vput(newvp); 1719 newvp = NULL; 1720 } 1721 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1722 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); 1723 if (!error) 1724 newvp = NFSTOV(np); 1725 } 1726 } 1727 if (info.v3) { 1728 if (error == 0) 1729 error = nfsm_wcc_data(&info, dvp, &wccflag); 1730 else 1731 (void)nfsm_wcc_data(&info, dvp, &wccflag); 1732 } 1733 m_freem(info.mrep); 1734 info.mrep = NULL; 1735 nfsmout: 1736 if (error) { 1737 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1738 KKASSERT(newvp == NULL); 1739 fmode &= ~O_EXCL; 1740 goto again; 1741 } 1742 } else if (info.v3 && (fmode & O_EXCL)) { 1743 /* 1744 * We are normally called with only a partially initialized 1745 * VAP. Since the NFSv3 spec says that server may use the 1746 * file attributes to store the verifier, the spec requires 1747 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1748 * in atime, but we can't really assume that all servers will 1749 * so we ensure that our SETATTR sets both atime and mtime. 1750 */ 1751 if (vap->va_mtime.tv_sec == VNOVAL) 1752 vfs_timestamp(&vap->va_mtime); 1753 if (vap->va_atime.tv_sec == VNOVAL) 1754 vap->va_atime = vap->va_mtime; 1755 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); 1756 } 1757 if (error == 0) { 1758 /* 1759 * The new np may have enough info for access 1760 * checks, make sure rucred and wucred are 1761 * initialized for read and write rpc's. 1762 */ 1763 np = VTONFS(newvp); 1764 if (np->n_rucred == NULL) 1765 np->n_rucred = crhold(cnp->cn_cred); 1766 if (np->n_wucred == NULL) 1767 np->n_wucred = crhold(cnp->cn_cred); 1768 *ap->a_vpp = newvp; 1769 } else if (newvp) { 1770 vput(newvp); 1771 } 1772 VTONFS(dvp)->n_flag |= NLMODIFIED; 1773 if (!wccflag) 1774 VTONFS(dvp)->n_attrstamp = 0; 1775 lwkt_reltoken(&nmp->nm_token); 1776 return (error); 1777 } 1778 1779 /* 1780 * nfs file remove call 1781 * To try and make nfs semantics closer to ufs semantics, a file that has 1782 * other processes using the vnode is renamed instead of removed and then 1783 * removed later on the last close. 1784 * - If v_refcnt > 1 1785 * If a rename is not already in the works 1786 * call nfs_sillyrename() to set it up 1787 * else 1788 * do the remove rpc 1789 * 1790 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 1791 * struct componentname *a_cnp) 1792 */ 1793 static int 1794 nfs_remove(struct vop_old_remove_args *ap) 1795 { 1796 struct vnode *vp = ap->a_vp; 1797 struct vnode *dvp = ap->a_dvp; 1798 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 1799 struct componentname *cnp = ap->a_cnp; 1800 struct nfsnode *np = VTONFS(vp); 1801 int error = 0; 1802 struct vattr vattr; 1803 1804 lwkt_gettoken(&nmp->nm_token); 1805 #ifndef DIAGNOSTIC 1806 if (VREFCNT(vp) < 1) 1807 panic("nfs_remove: bad v_refcnt"); 1808 #endif 1809 if (vp->v_type == VDIR) { 1810 error = EPERM; 1811 } else if (VREFCNT(vp) == 1 || (np->n_sillyrename && 1812 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) { 1813 /* 1814 * throw away biocache buffers, mainly to avoid 1815 * unnecessary delayed writes later. 1816 */ 1817 error = nfs_vinvalbuf(vp, 0, 1); 1818 /* Do the rpc */ 1819 if (error != EINTR) 1820 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1821 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); 1822 /* 1823 * Kludge City: If the first reply to the remove rpc is lost.. 1824 * the reply to the retransmitted request will be ENOENT 1825 * since the file was in fact removed 1826 * Therefore, we cheat and return success. 1827 */ 1828 if (error == ENOENT) 1829 error = 0; 1830 } else if (!np->n_sillyrename) { 1831 error = nfs_sillyrename(dvp, vp, cnp); 1832 } 1833 np->n_attrstamp = 0; 1834 lwkt_reltoken(&nmp->nm_token); 1835 1836 return (error); 1837 } 1838 1839 /* 1840 * nfs file remove rpc called from nfs_inactive 1841 * 1842 * NOTE: s_dvp can be VBAD during a forced unmount. 1843 */ 1844 int 1845 nfs_removeit(struct sillyrename *sp) 1846 { 1847 if (sp->s_dvp->v_type == VBAD) 1848 return(0); 1849 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, 1850 sp->s_cred, NULL)); 1851 } 1852 1853 /* 1854 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1855 */ 1856 static int 1857 nfs_removerpc(struct vnode *dvp, const char *name, int namelen, 1858 struct ucred *cred, struct thread *td) 1859 { 1860 int error = 0, wccflag = NFSV3_WCCRATTR; 1861 struct nfsm_info info; 1862 1863 info.mrep = NULL; 1864 info.v3 = NFS_ISV3(dvp); 1865 1866 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1867 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE, 1868 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1869 ERROROUT(nfsm_fhtom(&info, dvp)); 1870 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN)); 1871 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error)); 1872 if (info.v3) { 1873 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 1874 } 1875 m_freem(info.mrep); 1876 info.mrep = NULL; 1877 nfsmout: 1878 VTONFS(dvp)->n_flag |= NLMODIFIED; 1879 if (!wccflag) 1880 VTONFS(dvp)->n_attrstamp = 0; 1881 return (error); 1882 } 1883 1884 /* 1885 * nfs file rename call 1886 * 1887 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 1888 * struct componentname *a_fcnp, struct vnode *a_tdvp, 1889 * struct vnode *a_tvp, struct componentname *a_tcnp) 1890 */ 1891 static int 1892 nfs_rename(struct vop_old_rename_args *ap) 1893 { 1894 struct vnode *fvp = ap->a_fvp; 1895 struct vnode *tvp = ap->a_tvp; 1896 struct vnode *fdvp = ap->a_fdvp; 1897 struct vnode *tdvp = ap->a_tdvp; 1898 struct componentname *tcnp = ap->a_tcnp; 1899 struct componentname *fcnp = ap->a_fcnp; 1900 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount); 1901 int error; 1902 1903 lwkt_gettoken(&nmp->nm_token); 1904 1905 /* Check for cross-device rename */ 1906 if ((fvp->v_mount != tdvp->v_mount) || 1907 (tvp && (fvp->v_mount != tvp->v_mount))) { 1908 error = EXDEV; 1909 goto out; 1910 } 1911 1912 /* 1913 * We shouldn't have to flush fvp on rename for most server-side 1914 * filesystems as the file handle should not change. Unfortunately 1915 * the inode for some filesystems (msdosfs) might be tied to the 1916 * file name or directory position so to be completely safe 1917 * vfs.nfs.flush_on_rename is set by default. Clear to improve 1918 * performance. 1919 * 1920 * We must flush tvp on rename because it might become stale on the 1921 * server after the rename. 1922 */ 1923 if (nfs_flush_on_rename) 1924 VOP_FSYNC(fvp, MNT_WAIT, 0); 1925 if (tvp) 1926 VOP_FSYNC(tvp, MNT_WAIT, 0); 1927 1928 /* 1929 * If the tvp exists and is in use, sillyrename it before doing the 1930 * rename of the new file over it. 1931 * 1932 * XXX Can't sillyrename a directory. 1933 * 1934 * We do not attempt to do any namecache purges in this old API 1935 * routine. The new API compat functions have access to the actual 1936 * namecache structures and will do it for us. 1937 */ 1938 if (tvp && VREFCNT(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && 1939 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1940 vput(tvp); 1941 tvp = NULL; 1942 } else if (tvp) { 1943 ; 1944 } 1945 1946 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1947 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1948 tcnp->cn_td); 1949 1950 out: 1951 lwkt_reltoken(&nmp->nm_token); 1952 if (tdvp == tvp) 1953 vrele(tdvp); 1954 else 1955 vput(tdvp); 1956 if (tvp) 1957 vput(tvp); 1958 vrele(fdvp); 1959 vrele(fvp); 1960 /* 1961 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1962 */ 1963 if (error == ENOENT) 1964 error = 0; 1965 return (error); 1966 } 1967 1968 /* 1969 * nfs file rename rpc called from nfs_remove() above 1970 */ 1971 static int 1972 nfs_renameit(struct vnode *sdvp, struct componentname *scnp, 1973 struct sillyrename *sp) 1974 { 1975 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1976 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); 1977 } 1978 1979 /* 1980 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1981 */ 1982 static int 1983 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, 1984 struct vnode *tdvp, const char *tnameptr, int tnamelen, 1985 struct ucred *cred, struct thread *td) 1986 { 1987 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1988 struct nfsm_info info; 1989 1990 info.mrep = NULL; 1991 info.v3 = NFS_ISV3(fdvp); 1992 1993 nfsstats.rpccnt[NFSPROC_RENAME]++; 1994 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME, 1995 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 + 1996 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen)); 1997 ERROROUT(nfsm_fhtom(&info, fdvp)); 1998 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN)); 1999 ERROROUT(nfsm_fhtom(&info, tdvp)); 2000 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN)); 2001 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error)); 2002 if (info.v3) { 2003 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag)); 2004 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag)); 2005 } 2006 m_freem(info.mrep); 2007 info.mrep = NULL; 2008 nfsmout: 2009 VTONFS(fdvp)->n_flag |= NLMODIFIED; 2010 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2011 if (!fwccflag) 2012 VTONFS(fdvp)->n_attrstamp = 0; 2013 if (!twccflag) 2014 VTONFS(tdvp)->n_attrstamp = 0; 2015 return (error); 2016 } 2017 2018 /* 2019 * nfs hard link create call 2020 * 2021 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 2022 * struct componentname *a_cnp) 2023 */ 2024 static int 2025 nfs_link(struct vop_old_link_args *ap) 2026 { 2027 struct vnode *vp = ap->a_vp; 2028 struct vnode *tdvp = ap->a_tdvp; 2029 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount); 2030 struct componentname *cnp = ap->a_cnp; 2031 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2032 struct nfsm_info info; 2033 2034 if (vp->v_mount != tdvp->v_mount) { 2035 return (EXDEV); 2036 } 2037 lwkt_gettoken(&nmp->nm_token); 2038 2039 /* 2040 * The attribute cache may get out of sync with the server on link. 2041 * Pushing writes to the server before handle was inherited from 2042 * long long ago and it is unclear if we still need to do this. 2043 * Defaults to off. 2044 */ 2045 if (nfs_flush_on_hlink) 2046 VOP_FSYNC(vp, MNT_WAIT, 0); 2047 2048 info.mrep = NULL; 2049 info.v3 = NFS_ISV3(vp); 2050 2051 nfsstats.rpccnt[NFSPROC_LINK]++; 2052 nfsm_reqhead(&info, vp, NFSPROC_LINK, 2053 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED + 2054 nfsm_rndup(cnp->cn_namelen)); 2055 ERROROUT(nfsm_fhtom(&info, vp)); 2056 ERROROUT(nfsm_fhtom(&info, tdvp)); 2057 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2058 NFS_MAXNAMLEN)); 2059 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td, 2060 cnp->cn_cred, &error)); 2061 if (info.v3) { 2062 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2063 NFS_LATTR_NOSHRINK)); 2064 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag)); 2065 } 2066 m_freem(info.mrep); 2067 info.mrep = NULL; 2068 nfsmout: 2069 VTONFS(tdvp)->n_flag |= NLMODIFIED; 2070 if (!attrflag) 2071 VTONFS(vp)->n_attrstamp = 0; 2072 if (!wccflag) 2073 VTONFS(tdvp)->n_attrstamp = 0; 2074 /* 2075 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2076 */ 2077 if (error == EEXIST) 2078 error = 0; 2079 lwkt_reltoken(&nmp->nm_token); 2080 return (error); 2081 } 2082 2083 /* 2084 * nfs symbolic link create call 2085 * 2086 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 2087 * struct componentname *a_cnp, struct vattr *a_vap, 2088 * char *a_target) 2089 */ 2090 static int 2091 nfs_symlink(struct vop_old_symlink_args *ap) 2092 { 2093 struct vnode *dvp = ap->a_dvp; 2094 struct vattr *vap = ap->a_vap; 2095 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2096 struct componentname *cnp = ap->a_cnp; 2097 struct nfsv2_sattr *sp; 2098 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2099 struct vnode *newvp = NULL; 2100 struct nfsm_info info; 2101 2102 info.mrep = NULL; 2103 info.v3 = NFS_ISV3(dvp); 2104 lwkt_gettoken(&nmp->nm_token); 2105 2106 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2107 slen = strlen(ap->a_target); 2108 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK, 2109 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED + 2110 nfsm_rndup(cnp->cn_namelen) + 2111 nfsm_rndup(slen) + NFSX_SATTR(info.v3)); 2112 ERROROUT(nfsm_fhtom(&info, dvp)); 2113 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2114 NFS_MAXNAMLEN)); 2115 if (info.v3) { 2116 nfsm_v3attrbuild(&info, vap, FALSE); 2117 } 2118 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN)); 2119 if (info.v3 == 0) { 2120 sp = nfsm_build(&info, NFSX_V2SATTR); 2121 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2122 sp->sa_uid = nfs_xdrneg1; 2123 sp->sa_gid = nfs_xdrneg1; 2124 sp->sa_size = nfs_xdrneg1; 2125 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2126 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2127 } 2128 2129 /* 2130 * Issue the NFS request and get the rpc response. 2131 * 2132 * Only NFSv3 responses returning an error of 0 actually return 2133 * a file handle that can be converted into newvp without having 2134 * to do an extra lookup rpc. 2135 */ 2136 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td, 2137 cnp->cn_cred, &error)); 2138 if (info.v3) { 2139 if (error == 0) { 2140 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2141 } 2142 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2143 } 2144 2145 /* 2146 * out code jumps -> here, mrep is also freed. 2147 */ 2148 2149 m_freem(info.mrep); 2150 info.mrep = NULL; 2151 nfsmout: 2152 2153 /* 2154 * If we get an EEXIST error, silently convert it to no-error 2155 * in case of an NFS retry. 2156 */ 2157 if (error == EEXIST) 2158 error = 0; 2159 2160 /* 2161 * If we do not have (or no longer have) an error, and we could 2162 * not extract the newvp from the response due to the request being 2163 * NFSv2 or the error being EEXIST. We have to do a lookup in order 2164 * to obtain a newvp to return. 2165 */ 2166 if (error == 0 && newvp == NULL) { 2167 struct nfsnode *np = NULL; 2168 2169 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2170 cnp->cn_cred, cnp->cn_td, &np); 2171 if (!error) 2172 newvp = NFSTOV(np); 2173 } 2174 if (error) { 2175 if (newvp) 2176 vput(newvp); 2177 } else { 2178 *ap->a_vpp = newvp; 2179 } 2180 VTONFS(dvp)->n_flag |= NLMODIFIED; 2181 if (!wccflag) 2182 VTONFS(dvp)->n_attrstamp = 0; 2183 lwkt_reltoken(&nmp->nm_token); 2184 2185 return (error); 2186 } 2187 2188 /* 2189 * nfs make dir call 2190 * 2191 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 2192 * struct componentname *a_cnp, struct vattr *a_vap) 2193 */ 2194 static int 2195 nfs_mkdir(struct vop_old_mkdir_args *ap) 2196 { 2197 struct vnode *dvp = ap->a_dvp; 2198 struct vattr *vap = ap->a_vap; 2199 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2200 struct componentname *cnp = ap->a_cnp; 2201 struct nfsv2_sattr *sp; 2202 struct nfsnode *np = NULL; 2203 struct vnode *newvp = NULL; 2204 struct vattr vattr; 2205 int error = 0, wccflag = NFSV3_WCCRATTR; 2206 int gotvp = 0; 2207 int len; 2208 struct nfsm_info info; 2209 2210 info.mrep = NULL; 2211 info.v3 = NFS_ISV3(dvp); 2212 lwkt_gettoken(&nmp->nm_token); 2213 2214 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { 2215 lwkt_reltoken(&nmp->nm_token); 2216 return (error); 2217 } 2218 len = cnp->cn_namelen; 2219 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2220 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR, 2221 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2222 nfsm_rndup(len) + NFSX_SATTR(info.v3)); 2223 ERROROUT(nfsm_fhtom(&info, dvp)); 2224 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); 2225 if (info.v3) { 2226 nfsm_v3attrbuild(&info, vap, FALSE); 2227 } else { 2228 sp = nfsm_build(&info, NFSX_V2SATTR); 2229 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2230 sp->sa_uid = nfs_xdrneg1; 2231 sp->sa_gid = nfs_xdrneg1; 2232 sp->sa_size = nfs_xdrneg1; 2233 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2234 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2235 } 2236 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td, 2237 cnp->cn_cred, &error)); 2238 if (error == 0) { 2239 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); 2240 } 2241 if (info.v3) { 2242 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2243 } 2244 m_freem(info.mrep); 2245 info.mrep = NULL; 2246 nfsmout: 2247 VTONFS(dvp)->n_flag |= NLMODIFIED; 2248 if (!wccflag) 2249 VTONFS(dvp)->n_attrstamp = 0; 2250 /* 2251 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2252 * if we can succeed in looking up the directory. 2253 */ 2254 if (error == EEXIST || (!error && !gotvp)) { 2255 if (newvp) { 2256 vrele(newvp); 2257 newvp = NULL; 2258 } 2259 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2260 cnp->cn_td, &np); 2261 if (!error) { 2262 newvp = NFSTOV(np); 2263 if (newvp->v_type != VDIR) 2264 error = EEXIST; 2265 } 2266 } 2267 if (error) { 2268 if (newvp) 2269 vrele(newvp); 2270 } else { 2271 *ap->a_vpp = newvp; 2272 } 2273 lwkt_reltoken(&nmp->nm_token); 2274 return (error); 2275 } 2276 2277 /* 2278 * nfs remove directory call 2279 * 2280 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 2281 * struct componentname *a_cnp) 2282 */ 2283 static int 2284 nfs_rmdir(struct vop_old_rmdir_args *ap) 2285 { 2286 struct vnode *vp = ap->a_vp; 2287 struct vnode *dvp = ap->a_dvp; 2288 struct nfsmount *nmp = VFSTONFS(dvp->v_mount); 2289 struct componentname *cnp = ap->a_cnp; 2290 int error = 0, wccflag = NFSV3_WCCRATTR; 2291 struct nfsm_info info; 2292 2293 info.mrep = NULL; 2294 info.v3 = NFS_ISV3(dvp); 2295 2296 if (dvp == vp) 2297 return (EINVAL); 2298 2299 lwkt_gettoken(&nmp->nm_token); 2300 2301 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2302 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR, 2303 NFSX_FH(info.v3) + NFSX_UNSIGNED + 2304 nfsm_rndup(cnp->cn_namelen)); 2305 ERROROUT(nfsm_fhtom(&info, dvp)); 2306 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, 2307 NFS_MAXNAMLEN)); 2308 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td, 2309 cnp->cn_cred, &error)); 2310 if (info.v3) { 2311 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); 2312 } 2313 m_freem(info.mrep); 2314 info.mrep = NULL; 2315 nfsmout: 2316 VTONFS(dvp)->n_flag |= NLMODIFIED; 2317 if (!wccflag) 2318 VTONFS(dvp)->n_attrstamp = 0; 2319 /* 2320 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2321 */ 2322 if (error == ENOENT) 2323 error = 0; 2324 lwkt_reltoken(&nmp->nm_token); 2325 2326 return (error); 2327 } 2328 2329 /* 2330 * nfs readdir call 2331 * 2332 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 2333 */ 2334 static int 2335 nfs_readdir(struct vop_readdir_args *ap) 2336 { 2337 struct vnode *vp = ap->a_vp; 2338 struct nfsnode *np = VTONFS(vp); 2339 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2340 struct uio *uio = ap->a_uio; 2341 int tresid, error; 2342 struct vattr vattr; 2343 2344 if (vp->v_type != VDIR) 2345 return (EPERM); 2346 2347 error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_FAILRECLAIM); 2348 if (error) 2349 return (error); 2350 2351 lwkt_gettoken(&nmp->nm_token); 2352 2353 /* 2354 * If we have a valid EOF offset cache we must call VOP_GETATTR() 2355 * and then check that is still valid, or if this is an NQNFS mount 2356 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that 2357 * VOP_GETATTR() does not necessarily go to the wire. 2358 */ 2359 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2360 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) { 2361 if (VOP_GETATTR(vp, &vattr) == 0 && 2362 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0 2363 ) { 2364 nfsstats.direofcache_hits++; 2365 goto done; 2366 } 2367 } 2368 2369 /* 2370 * Call nfs_bioread() to do the real work. nfs_bioread() does its 2371 * own cache coherency checks so we do not have to. 2372 */ 2373 tresid = uio->uio_resid; 2374 error = nfs_bioread(vp, uio, 0); 2375 2376 if (!error && uio->uio_resid == tresid) 2377 nfsstats.direofcache_misses++; 2378 done: 2379 lwkt_reltoken(&nmp->nm_token); 2380 vn_unlock(vp); 2381 2382 return (error); 2383 } 2384 2385 /* 2386 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc. 2387 * 2388 * Note that for directories, nfs_bioread maintains the underlying nfs-centric 2389 * offset/block and converts the nfs formatted directory entries for userland 2390 * consumption as well as deals with offsets into the middle of blocks. 2391 * nfs_doio only deals with logical blocks. In particular, uio_offset will 2392 * be block-bounded. It must convert to cookies for the actual RPC. 2393 */ 2394 int 2395 nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop) 2396 { 2397 int len, left; 2398 struct nfs_dirent *dp = NULL; 2399 u_int32_t *tl; 2400 nfsuint64 *cookiep; 2401 caddr_t cp; 2402 nfsuint64 cookie; 2403 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2404 struct nfsnode *dnp = VTONFS(vp); 2405 u_quad_t fileno; 2406 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2407 int attrflag; 2408 struct nfsm_info info; 2409 2410 info.mrep = NULL; 2411 info.v3 = NFS_ISV3(vp); 2412 2413 #ifndef DIAGNOSTIC 2414 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2415 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2416 panic("nfs readdirrpc bad uio"); 2417 #endif 2418 2419 /* 2420 * If there is no cookie, assume directory was stale. 2421 */ 2422 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2423 if (cookiep) 2424 cookie = *cookiep; 2425 else 2426 return (NFSERR_BAD_COOKIE); 2427 /* 2428 * Loop around doing readdir rpc's of size nm_readdirsize 2429 * truncated to a multiple of DIRBLKSIZ. 2430 * The stopping criteria is EOF or buffer full. 2431 */ 2432 while (more_dirs && bigenough) { 2433 nfsstats.rpccnt[NFSPROC_READDIR]++; 2434 nfsm_reqhead(&info, vp, NFSPROC_READDIR, 2435 NFSX_FH(info.v3) + NFSX_READDIR(info.v3)); 2436 ERROROUT(nfsm_fhtom(&info, vp)); 2437 if (info.v3) { 2438 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); 2439 *tl++ = cookie.nfsuquad[0]; 2440 *tl++ = cookie.nfsuquad[1]; 2441 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2442 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2443 } else { 2444 /* 2445 * WARNING! HAMMER DIRECTORIES WILL NOT WORK WELL 2446 * WITH NFSv2!!! There's nothing I can really do 2447 * about it other than to hope the server supports 2448 * rdirplus w/NFSv2. 2449 */ 2450 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); 2451 *tl++ = cookie.nfsuquad[0]; 2452 } 2453 *tl = txdr_unsigned(nmp->nm_readdirsize); 2454 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR, 2455 uiop->uio_td, 2456 nfs_vpcred(vp, ND_READ), &error)); 2457 if (info.v3) { 2458 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2459 NFS_LATTR_NOSHRINK)); 2460 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2461 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2462 dnp->n_cookieverf.nfsuquad[1] = *tl; 2463 } 2464 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2465 more_dirs = fxdr_unsigned(int, *tl); 2466 2467 /* loop thru the dir entries, converting them to std form */ 2468 while (more_dirs && bigenough) { 2469 if (info.v3) { 2470 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2471 fileno = fxdr_hyper(tl); 2472 len = fxdr_unsigned(int, *(tl + 2)); 2473 } else { 2474 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2475 fileno = fxdr_unsigned(u_quad_t, *tl++); 2476 len = fxdr_unsigned(int, *tl); 2477 } 2478 if (len <= 0 || len > NFS_MAXNAMLEN) { 2479 error = EBADRPC; 2480 m_freem(info.mrep); 2481 info.mrep = NULL; 2482 goto nfsmout; 2483 } 2484 2485 /* 2486 * len is the number of bytes in the path element 2487 * name, not including the \0 termination. 2488 * 2489 * tlen is the number of bytes w have to reserve for 2490 * the path element name. 2491 */ 2492 tlen = nfsm_rndup(len); 2493 if (tlen == len) 2494 tlen += 4; /* To ensure null termination */ 2495 2496 /* 2497 * If the entry would cross a DIRBLKSIZ boundary, 2498 * extend the previous nfs_dirent to cover the 2499 * remaining space. 2500 */ 2501 left = DIRBLKSIZ - blksiz; 2502 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2503 dp->nfs_reclen += left; 2504 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2505 uiop->uio_iov->iov_len -= left; 2506 uiop->uio_offset += left; 2507 uiop->uio_resid -= left; 2508 blksiz = 0; 2509 } 2510 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2511 bigenough = 0; 2512 if (bigenough) { 2513 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2514 dp->nfs_ino = fileno; 2515 dp->nfs_namlen = len; 2516 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2517 dp->nfs_type = DT_UNKNOWN; 2518 blksiz += dp->nfs_reclen; 2519 if (blksiz == DIRBLKSIZ) 2520 blksiz = 0; 2521 uiop->uio_offset += sizeof(struct nfs_dirent); 2522 uiop->uio_resid -= sizeof(struct nfs_dirent); 2523 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2524 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2525 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2526 2527 /* 2528 * The uiop has advanced by nfs_dirent + len 2529 * but really needs to advance by 2530 * nfs_dirent + tlen 2531 */ 2532 cp = uiop->uio_iov->iov_base; 2533 tlen -= len; 2534 *cp = '\0'; /* null terminate */ 2535 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2536 uiop->uio_iov->iov_len -= tlen; 2537 uiop->uio_offset += tlen; 2538 uiop->uio_resid -= tlen; 2539 } else { 2540 /* 2541 * NFS strings must be rounded up (nfsm_myouio 2542 * handled that in the bigenough case). 2543 */ 2544 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2545 } 2546 if (info.v3) { 2547 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2548 } else { 2549 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); 2550 } 2551 2552 /* 2553 * If we were able to accomodate the last entry, 2554 * get the cookie for the next one. Otherwise 2555 * hold-over the cookie for the one we were not 2556 * able to accomodate. 2557 */ 2558 if (bigenough) { 2559 cookie.nfsuquad[0] = *tl++; 2560 if (info.v3) 2561 cookie.nfsuquad[1] = *tl++; 2562 } else if (info.v3) { 2563 tl += 2; 2564 } else { 2565 tl++; 2566 } 2567 more_dirs = fxdr_unsigned(int, *tl); 2568 } 2569 /* 2570 * If at end of rpc data, get the eof boolean 2571 */ 2572 if (!more_dirs) { 2573 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2574 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2575 } 2576 m_freem(info.mrep); 2577 info.mrep = NULL; 2578 } 2579 /* 2580 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2581 * by increasing d_reclen for the last record. 2582 */ 2583 if (blksiz > 0) { 2584 left = DIRBLKSIZ - blksiz; 2585 dp->nfs_reclen += left; 2586 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2587 uiop->uio_iov->iov_len -= left; 2588 uiop->uio_offset += left; 2589 uiop->uio_resid -= left; 2590 } 2591 2592 if (bigenough) { 2593 /* 2594 * We hit the end of the directory, update direofoffset. 2595 */ 2596 dnp->n_direofoffset = uiop->uio_offset; 2597 } else { 2598 /* 2599 * There is more to go, insert the link cookie so the 2600 * next block can be read. 2601 */ 2602 if (uiop->uio_resid > 0) 2603 kprintf("EEK! readdirrpc resid > 0\n"); 2604 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2605 *cookiep = cookie; 2606 } 2607 nfsmout: 2608 return (error); 2609 } 2610 2611 /* 2612 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2613 */ 2614 int 2615 nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop) 2616 { 2617 int len, left; 2618 struct nfs_dirent *dp; 2619 u_int32_t *tl; 2620 struct vnode *newvp; 2621 nfsuint64 *cookiep; 2622 caddr_t dpossav1, dpossav2; 2623 caddr_t cp; 2624 struct mbuf *mdsav1, *mdsav2; 2625 nfsuint64 cookie; 2626 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2627 struct nfsnode *dnp = VTONFS(vp), *np; 2628 nfsfh_t *fhp; 2629 u_quad_t fileno; 2630 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2631 int attrflag, fhsize; 2632 struct nchandle nch; 2633 struct nchandle dnch; 2634 struct nlcomponent nlc; 2635 struct nfsm_info info; 2636 2637 info.mrep = NULL; 2638 info.v3 = 1; 2639 2640 #ifndef nolint 2641 dp = NULL; 2642 #endif 2643 #ifndef DIAGNOSTIC 2644 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2645 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2646 panic("nfs readdirplusrpc bad uio"); 2647 #endif 2648 /* 2649 * Obtain the namecache record for the directory so we have something 2650 * to use as a basis for creating the entries. This function will 2651 * return a held (but not locked) ncp. The ncp may be disconnected 2652 * from the tree and cannot be used for upward traversals, and the 2653 * ncp may be unnamed. Note that other unrelated operations may 2654 * cause the ncp to be named at any time. 2655 * 2656 * We have to lock the ncp to prevent a lock order reversal when 2657 * rdirplus does nlookups of the children, because the vnode is 2658 * locked and has to stay that way. 2659 */ 2660 cache_fromdvp(vp, NULL, 0, &dnch); 2661 bzero(&nlc, sizeof(nlc)); 2662 newvp = NULLVP; 2663 2664 /* 2665 * If there is no cookie, assume directory was stale. 2666 */ 2667 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2668 if (cookiep) { 2669 cookie = *cookiep; 2670 } else { 2671 if (dnch.ncp) 2672 cache_drop(&dnch); 2673 return (NFSERR_BAD_COOKIE); 2674 } 2675 2676 /* 2677 * Loop around doing readdir rpc's of size nm_readdirsize 2678 * truncated to a multiple of DIRBLKSIZ. 2679 * The stopping criteria is EOF or buffer full. 2680 */ 2681 while (more_dirs && bigenough) { 2682 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2683 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS, 2684 NFSX_FH(info.v3) + 6 * NFSX_UNSIGNED); 2685 ERROROUT(nfsm_fhtom(&info, vp)); 2686 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED); 2687 *tl++ = cookie.nfsuquad[0]; 2688 *tl++ = cookie.nfsuquad[1]; 2689 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2690 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2691 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2692 *tl = txdr_unsigned(nmp->nm_rsize); 2693 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS, 2694 uiop->uio_td, 2695 nfs_vpcred(vp, ND_READ), &error)); 2696 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, 2697 NFS_LATTR_NOSHRINK)); 2698 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2699 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2700 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2701 more_dirs = fxdr_unsigned(int, *tl); 2702 2703 /* loop thru the dir entries, doctoring them to 4bsd form */ 2704 while (more_dirs && bigenough) { 2705 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2706 fileno = fxdr_hyper(tl); 2707 len = fxdr_unsigned(int, *(tl + 2)); 2708 if (len <= 0 || len > NFS_MAXNAMLEN) { 2709 error = EBADRPC; 2710 m_freem(info.mrep); 2711 info.mrep = NULL; 2712 goto nfsmout; 2713 } 2714 tlen = nfsm_rndup(len); 2715 if (tlen == len) 2716 tlen += 4; /* To ensure null termination*/ 2717 left = DIRBLKSIZ - blksiz; 2718 if ((tlen + sizeof(struct nfs_dirent)) > left) { 2719 dp->nfs_reclen += left; 2720 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2721 uiop->uio_iov->iov_len -= left; 2722 uiop->uio_offset += left; 2723 uiop->uio_resid -= left; 2724 blksiz = 0; 2725 } 2726 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) 2727 bigenough = 0; 2728 if (bigenough) { 2729 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; 2730 dp->nfs_ino = fileno; 2731 dp->nfs_namlen = len; 2732 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); 2733 dp->nfs_type = DT_UNKNOWN; 2734 blksiz += dp->nfs_reclen; 2735 if (blksiz == DIRBLKSIZ) 2736 blksiz = 0; 2737 uiop->uio_offset += sizeof(struct nfs_dirent); 2738 uiop->uio_resid -= sizeof(struct nfs_dirent); 2739 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); 2740 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); 2741 nlc.nlc_nameptr = uiop->uio_iov->iov_base; 2742 nlc.nlc_namelen = len; 2743 ERROROUT(nfsm_mtouio(&info, uiop, len)); 2744 cp = uiop->uio_iov->iov_base; 2745 tlen -= len; 2746 *cp = '\0'; 2747 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; 2748 uiop->uio_iov->iov_len -= tlen; 2749 uiop->uio_offset += tlen; 2750 uiop->uio_resid -= tlen; 2751 } else { 2752 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 2753 } 2754 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 2755 if (bigenough) { 2756 cookie.nfsuquad[0] = *tl++; 2757 cookie.nfsuquad[1] = *tl++; 2758 } else { 2759 tl += 2; 2760 } 2761 2762 /* 2763 * Since the attributes are before the file handle 2764 * (sigh), we must skip over the attributes and then 2765 * come back and get them. 2766 */ 2767 attrflag = fxdr_unsigned(int, *tl); 2768 if (attrflag) { 2769 dpossav1 = info.dpos; 2770 mdsav1 = info.md; 2771 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR)); 2772 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2773 doit = fxdr_unsigned(int, *tl); 2774 if (doit) { 2775 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); 2776 } 2777 if (doit && bigenough && !nlcdegenerate(&nlc) && 2778 !NFS_CMPFH(dnp, fhp, fhsize) 2779 ) { 2780 if (dnch.ncp) { 2781 #if 0 2782 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n", 2783 nlc.nlc_namelen, nlc.nlc_namelen, 2784 nlc.nlc_nameptr); 2785 #endif 2786 /* 2787 * This is a bit hokey but there isn't 2788 * much we can do about it. We can't 2789 * hold the directory vp locked while 2790 * doing lookups and gets. 2791 */ 2792 nch = cache_nlookup_nonblock(&dnch, &nlc); 2793 if (nch.ncp == NULL) 2794 goto rdfail; 2795 cache_setunresolved(&nch); 2796 error = nfs_nget_nonblock(vp->v_mount, fhp, 2797 fhsize, &np, 2798 NULL); 2799 if (error) { 2800 cache_put(&nch); 2801 goto rdfail; 2802 } 2803 newvp = NFSTOV(np); 2804 dpossav2 = info.dpos; 2805 info.dpos = dpossav1; 2806 mdsav2 = info.md; 2807 info.md = mdsav1; 2808 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 2809 info.dpos = dpossav2; 2810 info.md = mdsav2; 2811 dp->nfs_type = 2812 IFTODT(VTTOIF(np->n_vattr.va_type)); 2813 nfs_cache_setvp(&nch, newvp, 2814 nfspos_cache_timeout); 2815 vput(newvp); 2816 newvp = NULLVP; 2817 cache_put(&nch); 2818 } else { 2819 rdfail: 2820 ; 2821 #if 0 2822 kprintf("Warning: NFS/rddirplus, " 2823 "UNABLE TO ENTER %*.*s\n", 2824 nlc.nlc_namelen, nlc.nlc_namelen, 2825 nlc.nlc_nameptr); 2826 #endif 2827 } 2828 } 2829 } else { 2830 /* Just skip over the file handle */ 2831 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2832 i = fxdr_unsigned(int, *tl); 2833 ERROROUT(nfsm_adv(&info, nfsm_rndup(i))); 2834 } 2835 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2836 more_dirs = fxdr_unsigned(int, *tl); 2837 } 2838 /* 2839 * If at end of rpc data, get the eof boolean 2840 */ 2841 if (!more_dirs) { 2842 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); 2843 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2844 } 2845 m_freem(info.mrep); 2846 info.mrep = NULL; 2847 } 2848 /* 2849 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2850 * by increasing d_reclen for the last record. 2851 */ 2852 if (blksiz > 0) { 2853 left = DIRBLKSIZ - blksiz; 2854 dp->nfs_reclen += left; 2855 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; 2856 uiop->uio_iov->iov_len -= left; 2857 uiop->uio_offset += left; 2858 uiop->uio_resid -= left; 2859 } 2860 2861 /* 2862 * We are now either at the end of the directory or have filled the 2863 * block. 2864 */ 2865 if (bigenough) { 2866 dnp->n_direofoffset = uiop->uio_offset; 2867 } else { 2868 if (uiop->uio_resid > 0) 2869 kprintf("EEK! readdirplusrpc resid > 0\n"); 2870 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2871 *cookiep = cookie; 2872 } 2873 nfsmout: 2874 if (newvp != NULLVP) { 2875 if (newvp == vp) 2876 vrele(newvp); 2877 else 2878 vput(newvp); 2879 newvp = NULLVP; 2880 } 2881 if (dnch.ncp) 2882 cache_drop(&dnch); 2883 return (error); 2884 } 2885 2886 /* 2887 * Silly rename. To make the NFS filesystem that is stateless look a little 2888 * more like the "ufs" a remove of an active vnode is translated to a rename 2889 * to a funny looking filename that is removed by nfs_inactive on the 2890 * nfsnode. There is the potential for another process on a different client 2891 * to create the same funny name between the nfs_lookitup() fails and the 2892 * nfs_rename() completes, but... 2893 */ 2894 static int 2895 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2896 { 2897 struct sillyrename *sp; 2898 struct nfsnode *np; 2899 int error; 2900 2901 /* 2902 * We previously purged dvp instead of vp. I don't know why, it 2903 * completely destroys performance. We can't do it anyway with the 2904 * new VFS API since we would be breaking the namecache topology. 2905 */ 2906 cache_purge(vp); /* XXX */ 2907 np = VTONFS(vp); 2908 #ifndef DIAGNOSTIC 2909 if (vp->v_type == VDIR) 2910 panic("nfs: sillyrename dir"); 2911 #endif 2912 sp = kmalloc(sizeof(struct sillyrename), M_NFSREQ, M_WAITOK); 2913 sp->s_cred = crdup(cnp->cn_cred); 2914 sp->s_dvp = dvp; 2915 vref(dvp); 2916 2917 /* Fudge together a funny name */ 2918 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", 2919 (int)(intptr_t)cnp->cn_td); 2920 2921 /* Try lookitups until we get one that isn't there */ 2922 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2923 cnp->cn_td, NULL) == 0) { 2924 sp->s_name[4]++; 2925 if (sp->s_name[4] > 'z') { 2926 error = EINVAL; 2927 goto bad; 2928 } 2929 } 2930 error = nfs_renameit(dvp, cnp, sp); 2931 if (error) 2932 goto bad; 2933 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2934 cnp->cn_td, &np); 2935 np->n_sillyrename = sp; 2936 return (0); 2937 bad: 2938 vrele(sp->s_dvp); 2939 crfree(sp->s_cred); 2940 kfree((caddr_t)sp, M_NFSREQ); 2941 return (error); 2942 } 2943 2944 /* 2945 * Look up a file name and optionally either update the file handle or 2946 * allocate an nfsnode, depending on the value of npp. 2947 * npp == NULL --> just do the lookup 2948 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2949 * handled too 2950 * *npp != NULL --> update the file handle in the vnode 2951 */ 2952 static int 2953 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, 2954 struct thread *td, struct nfsnode **npp) 2955 { 2956 struct vnode *newvp = NULL; 2957 struct nfsnode *np, *dnp = VTONFS(dvp); 2958 int error = 0, fhlen, attrflag; 2959 nfsfh_t *nfhp; 2960 struct nfsm_info info; 2961 2962 info.mrep = NULL; 2963 info.v3 = NFS_ISV3(dvp); 2964 2965 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2966 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, 2967 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2968 ERROROUT(nfsm_fhtom(&info, dvp)); 2969 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN)); 2970 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error)); 2971 if (npp && !error) { 2972 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp)); 2973 if (*npp) { 2974 np = *npp; 2975 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2976 kfree((caddr_t)np->n_fhp, M_NFSBIGFH); 2977 np->n_fhp = &np->n_fh; 2978 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2979 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK); 2980 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2981 np->n_fhsize = fhlen; 2982 newvp = NFSTOV(np); 2983 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2984 vref(dvp); 2985 newvp = dvp; 2986 } else { 2987 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np, NULL); 2988 if (error) { 2989 m_freem(info.mrep); 2990 info.mrep = NULL; 2991 return (error); 2992 } 2993 newvp = NFSTOV(np); 2994 } 2995 if (info.v3) { 2996 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, 2997 NFS_LATTR_NOSHRINK)); 2998 if (!attrflag && *npp == NULL) { 2999 m_freem(info.mrep); 3000 info.mrep = NULL; 3001 if (newvp == dvp) 3002 vrele(newvp); 3003 else 3004 vput(newvp); 3005 return (ENOENT); 3006 } 3007 } else { 3008 ERROROUT(nfsm_loadattr(&info, newvp, NULL)); 3009 } 3010 } 3011 m_freem(info.mrep); 3012 info.mrep = NULL; 3013 nfsmout: 3014 if (npp && *npp == NULL) { 3015 if (error) { 3016 if (newvp) { 3017 if (newvp == dvp) 3018 vrele(newvp); 3019 else 3020 vput(newvp); 3021 } 3022 } else 3023 *npp = np; 3024 } 3025 return (error); 3026 } 3027 3028 /* 3029 * Nfs Version 3 commit rpc 3030 * 3031 * We call it 'uio' to distinguish it from 'bio' but there is no real uio 3032 * involved. 3033 */ 3034 int 3035 nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) 3036 { 3037 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3038 int error = 0, wccflag = NFSV3_WCCRATTR; 3039 struct nfsm_info info; 3040 u_int32_t *tl; 3041 3042 info.mrep = NULL; 3043 info.v3 = 1; 3044 3045 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 3046 return (0); 3047 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3048 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1)); 3049 ERROROUT(nfsm_fhtom(&info, vp)); 3050 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED); 3051 txdr_hyper(offset, tl); 3052 tl += 2; 3053 *tl = txdr_unsigned(cnt); 3054 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td, 3055 nfs_vpcred(vp, ND_WRITE), &error)); 3056 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); 3057 if (!error) { 3058 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF)); 3059 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 3060 NFSX_V3WRITEVERF)) { 3061 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 3062 NFSX_V3WRITEVERF); 3063 error = NFSERR_STALEWRITEVERF; 3064 } 3065 } 3066 m_freem(info.mrep); 3067 info.mrep = NULL; 3068 nfsmout: 3069 return (error); 3070 } 3071 3072 /* 3073 * Kludge City.. 3074 * - make nfs_bmap() essentially a no-op that does no translation 3075 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3076 * (Maybe I could use the process's page mapping, but I was concerned that 3077 * Kernel Write might not be enabled and also figured copyout() would do 3078 * a lot more work than bcopy() and also it currently happens in the 3079 * context of the swapper process (2). 3080 * 3081 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, 3082 * off_t *a_doffsetp, int *a_runp, int *a_runb) 3083 */ 3084 static int 3085 nfs_bmap(struct vop_bmap_args *ap) 3086 { 3087 /* no token lock required */ 3088 if (ap->a_doffsetp != NULL) 3089 *ap->a_doffsetp = ap->a_loffset; 3090 if (ap->a_runp != NULL) 3091 *ap->a_runp = 0; 3092 if (ap->a_runb != NULL) 3093 *ap->a_runb = 0; 3094 return (0); 3095 } 3096 3097 /* 3098 * Strategy routine. 3099 */ 3100 static int 3101 nfs_strategy(struct vop_strategy_args *ap) 3102 { 3103 struct bio *bio = ap->a_bio; 3104 struct bio *nbio; 3105 struct buf *bp __debugvar = bio->bio_buf; 3106 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3107 struct thread *td; 3108 int error; 3109 3110 KASSERT(bp->b_cmd != BUF_CMD_DONE, 3111 ("nfs_strategy: buffer %p unexpectedly marked done", bp)); 3112 KASSERT(BUF_REFCNT(bp) > 0, 3113 ("nfs_strategy: buffer %p not locked", bp)); 3114 3115 if (bio->bio_flags & BIO_SYNC) 3116 td = curthread; /* XXX */ 3117 else 3118 td = NULL; 3119 3120 lwkt_gettoken(&nmp->nm_token); 3121 3122 /* 3123 * We probably don't need to push an nbio any more since no 3124 * block conversion is required due to the use of 64 bit byte 3125 * offsets, but do it anyway. 3126 * 3127 * NOTE: When NFS callers itself via this strategy routines and 3128 * sets up a synchronous I/O, it expects the I/O to run 3129 * synchronously (its bio_done routine just assumes it), 3130 * so for now we have to honor the bit. 3131 */ 3132 nbio = push_bio(bio); 3133 nbio->bio_offset = bio->bio_offset; 3134 nbio->bio_flags = bio->bio_flags & BIO_SYNC; 3135 3136 /* 3137 * If the op is asynchronous and an i/o daemon is waiting 3138 * queue the request, wake it up and wait for completion 3139 * otherwise just do it ourselves. 3140 */ 3141 if (bio->bio_flags & BIO_SYNC) { 3142 error = nfs_doio(ap->a_vp, nbio, td); 3143 } else { 3144 nfs_asyncio(ap->a_vp, nbio); 3145 error = 0; 3146 } 3147 lwkt_reltoken(&nmp->nm_token); 3148 3149 return (error); 3150 } 3151 3152 /* 3153 * Mmap a file 3154 * 3155 * NB Currently unsupported. 3156 * 3157 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred) 3158 */ 3159 /* ARGSUSED */ 3160 static int 3161 nfs_mmap(struct vop_mmap_args *ap) 3162 { 3163 /* no token lock required */ 3164 return (EINVAL); 3165 } 3166 3167 /* 3168 * fsync vnode op. Just call nfs_flush() with commit == 1. 3169 * 3170 * nfs_fsync(struct vnode *a_vp, int a_waitfor) 3171 */ 3172 /* ARGSUSED */ 3173 static int 3174 nfs_fsync(struct vop_fsync_args *ap) 3175 { 3176 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3177 int error; 3178 3179 lwkt_gettoken(&nmp->nm_token); 3180 3181 /* 3182 * NOTE: Because attributes are set synchronously we currently 3183 * do not have to implement vsetisdirty()/vclrisdirty(). 3184 */ 3185 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1); 3186 3187 lwkt_reltoken(&nmp->nm_token); 3188 3189 return error; 3190 } 3191 3192 /* 3193 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be 3194 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains 3195 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is 3196 * set the buffer contains data that has already been written to the server 3197 * and which now needs a commit RPC. 3198 * 3199 * If commit is 0 we only take one pass and only flush buffers containing new 3200 * dirty data. 3201 * 3202 * If commit is 1 we take two passes, issuing a commit RPC in the second 3203 * pass. 3204 * 3205 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required 3206 * to completely flush all pending data. 3207 * 3208 * Note that the RB_SCAN code properly handles the case where the 3209 * callback might block and directly or indirectly (another thread) cause 3210 * the RB tree to change. 3211 */ 3212 3213 #ifndef NFS_COMMITBVECSIZ 3214 #define NFS_COMMITBVECSIZ 16 3215 #endif 3216 3217 struct nfs_flush_info { 3218 enum { NFI_FLUSHNEW, NFI_COMMIT } mode; 3219 struct thread *td; 3220 struct vnode *vp; 3221 int waitfor; 3222 int slpflag; 3223 int slptimeo; 3224 int loops; 3225 struct buf *bvary[NFS_COMMITBVECSIZ]; 3226 int bvsize; 3227 off_t beg_off; 3228 off_t end_off; 3229 }; 3230 3231 static int nfs_flush_bp(struct buf *bp, void *data); 3232 static int nfs_flush_docommit(struct nfs_flush_info *info, int error); 3233 3234 int 3235 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) 3236 { 3237 struct nfsnode *np = VTONFS(vp); 3238 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3239 struct nfs_flush_info info; 3240 int error; 3241 3242 bzero(&info, sizeof(info)); 3243 info.td = td; 3244 info.vp = vp; 3245 info.waitfor = waitfor; 3246 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0; 3247 info.loops = 0; 3248 lwkt_gettoken(&vp->v_token); 3249 3250 do { 3251 /* 3252 * Flush mode 3253 */ 3254 info.mode = NFI_FLUSHNEW; 3255 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3256 nfs_flush_bp, &info); 3257 3258 /* 3259 * Take a second pass if committing and no error occured. 3260 * Clean up any left over collection (whether an error 3261 * occurs or not). 3262 */ 3263 if (commit && error == 0) { 3264 info.mode = NFI_COMMIT; 3265 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 3266 nfs_flush_bp, &info); 3267 if (info.bvsize) 3268 error = nfs_flush_docommit(&info, error); 3269 } 3270 3271 /* 3272 * Wait for pending I/O to complete before checking whether 3273 * any further dirty buffers exist. 3274 */ 3275 while (waitfor == MNT_WAIT && 3276 bio_track_active(&vp->v_track_write)) { 3277 error = bio_track_wait(&vp->v_track_write, 3278 info.slpflag, info.slptimeo); 3279 if (error) { 3280 /* 3281 * We have to be able to break out if this 3282 * is an 'intr' mount. 3283 */ 3284 if (nfs_sigintr(nmp, NULL, td)) { 3285 error = -EINTR; 3286 break; 3287 } 3288 3289 /* 3290 * Since we do not process pending signals, 3291 * once we get a PCATCH our tsleep() will no 3292 * longer sleep, switch to a fixed timeout 3293 * instead. 3294 */ 3295 if (info.slpflag == PCATCH) { 3296 info.slpflag = 0; 3297 info.slptimeo = 2 * hz; 3298 } 3299 error = 0; 3300 } 3301 } 3302 ++info.loops; 3303 /* 3304 * Loop if we are flushing synchronous as well as committing, 3305 * and dirty buffers are still present. Otherwise we might livelock. 3306 */ 3307 } while (waitfor == MNT_WAIT && commit && 3308 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree)); 3309 3310 /* 3311 * The callbacks have to return a negative error to terminate the 3312 * RB scan. 3313 */ 3314 if (error < 0) 3315 error = -error; 3316 3317 /* 3318 * Deal with any error collection 3319 */ 3320 if (np->n_flag & NWRITEERR) { 3321 error = np->n_error; 3322 np->n_flag &= ~NWRITEERR; 3323 } 3324 lwkt_reltoken(&vp->v_token); 3325 return (error); 3326 } 3327 3328 static 3329 int 3330 nfs_flush_bp(struct buf *bp, void *data) 3331 { 3332 struct nfs_flush_info *info = data; 3333 int lkflags; 3334 int error; 3335 off_t toff; 3336 3337 error = 0; 3338 switch(info->mode) { 3339 case NFI_FLUSHNEW: 3340 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3341 if (error && info->loops && info->waitfor == MNT_WAIT) { 3342 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); 3343 if (error) { 3344 lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL; 3345 if (info->slpflag & PCATCH) 3346 lkflags |= LK_PCATCH; 3347 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync", 3348 info->slptimeo); 3349 } 3350 } 3351 3352 /* 3353 * Ignore locking errors 3354 */ 3355 if (error) { 3356 error = 0; 3357 break; 3358 } 3359 3360 /* 3361 * The buffer may have changed out from under us, even if 3362 * we did not block (MPSAFE). Check again now that it is 3363 * locked. 3364 */ 3365 if (bp->b_vp == info->vp && 3366 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) { 3367 bremfree(bp); 3368 bawrite(bp); 3369 } else { 3370 BUF_UNLOCK(bp); 3371 } 3372 break; 3373 case NFI_COMMIT: 3374 /* 3375 * Only process buffers in need of a commit which we can 3376 * immediately lock. This may prevent a buffer from being 3377 * committed, but the normal flush loop will block on the 3378 * same buffer so we shouldn't get into an endless loop. 3379 */ 3380 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3381 (B_DELWRI | B_NEEDCOMMIT)) { 3382 break; 3383 } 3384 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 3385 break; 3386 3387 /* 3388 * We must recheck after successfully locking the buffer. 3389 */ 3390 if (bp->b_vp != info->vp || 3391 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 3392 (B_DELWRI | B_NEEDCOMMIT)) { 3393 BUF_UNLOCK(bp); 3394 break; 3395 } 3396 3397 /* 3398 * NOTE: storing the bp in the bvary[] basically sets 3399 * it up for a commit operation. 3400 * 3401 * We must call vfs_busy_pages() now so the commit operation 3402 * is interlocked with user modifications to memory mapped 3403 * pages. The b_dirtyoff/b_dirtyend range is not correct 3404 * until after the pages have been busied. 3405 * 3406 * Note: to avoid loopback deadlocks, we do not 3407 * assign b_runningbufspace. 3408 */ 3409 bremfree(bp); 3410 bp->b_cmd = BUF_CMD_WRITE; 3411 vfs_busy_pages(bp->b_vp, bp); 3412 info->bvary[info->bvsize] = bp; 3413 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff; 3414 if (info->bvsize == 0 || toff < info->beg_off) 3415 info->beg_off = toff; 3416 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff); 3417 if (info->bvsize == 0 || toff > info->end_off) 3418 info->end_off = toff; 3419 ++info->bvsize; 3420 if (info->bvsize == NFS_COMMITBVECSIZ) { 3421 error = nfs_flush_docommit(info, 0); 3422 KKASSERT(info->bvsize == 0); 3423 } 3424 } 3425 return (error); 3426 } 3427 3428 static 3429 int 3430 nfs_flush_docommit(struct nfs_flush_info *info, int error) 3431 { 3432 struct vnode *vp; 3433 struct buf *bp; 3434 off_t bytes; 3435 int retv; 3436 int i; 3437 3438 vp = info->vp; 3439 3440 if (info->bvsize > 0) { 3441 /* 3442 * Commit data on the server, as required. Note that 3443 * nfs_commit will use the vnode's cred for the commit. 3444 * The NFSv3 commit RPC is limited to a 32 bit byte count. 3445 */ 3446 bytes = info->end_off - info->beg_off; 3447 if (bytes > 0x40000000) 3448 bytes = 0x40000000; 3449 if (error) { 3450 retv = -error; 3451 } else { 3452 retv = nfs_commitrpc_uio(vp, info->beg_off, 3453 (int)bytes, info->td); 3454 if (retv == NFSERR_STALEWRITEVERF) 3455 nfs_clearcommit(vp->v_mount); 3456 } 3457 3458 /* 3459 * Now, either mark the blocks I/O done or mark the 3460 * blocks dirty, depending on whether the commit 3461 * succeeded. 3462 */ 3463 for (i = 0; i < info->bvsize; ++i) { 3464 bp = info->bvary[i]; 3465 if (retv || (bp->b_flags & B_NEEDCOMMIT) == 0) { 3466 /* 3467 * Either an error or the original 3468 * vfs_busy_pages() cleared B_NEEDCOMMIT 3469 * due to finding new dirty VM pages in 3470 * the buffer. 3471 * 3472 * Leave B_DELWRI intact. 3473 */ 3474 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3475 vfs_unbusy_pages(bp); 3476 bp->b_cmd = BUF_CMD_DONE; 3477 bqrelse(bp); 3478 } else { 3479 /* 3480 * Success, remove B_DELWRI ( bundirty() ). 3481 * 3482 * b_dirtyoff/b_dirtyend seem to be NFS 3483 * specific. We should probably move that 3484 * into bundirty(). XXX 3485 * 3486 * We are faking an I/O write, we have to 3487 * start the transaction in order to 3488 * immediately biodone() it. 3489 */ 3490 bundirty(bp); 3491 bp->b_flags &= ~B_ERROR; 3492 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 3493 bp->b_dirtyoff = bp->b_dirtyend = 0; 3494 biodone(&bp->b_bio1); 3495 } 3496 } 3497 info->bvsize = 0; 3498 } 3499 return (error); 3500 } 3501 3502 /* 3503 * NFS advisory byte-level locks. 3504 * Currently unsupported. 3505 * 3506 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, 3507 * int a_flags) 3508 */ 3509 static int 3510 nfs_advlock(struct vop_advlock_args *ap) 3511 { 3512 struct nfsnode *np = VTONFS(ap->a_vp); 3513 3514 /* no token lock currently required */ 3515 /* 3516 * The following kludge is to allow diskless support to work 3517 * until a real NFS lockd is implemented. Basically, just pretend 3518 * that this is a local lock. 3519 */ 3520 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 3521 } 3522 3523 /* 3524 * Print out the contents of an nfsnode. 3525 * 3526 * nfs_print(struct vnode *a_vp) 3527 */ 3528 static int 3529 nfs_print(struct vop_print_args *ap) 3530 { 3531 struct vnode *vp = ap->a_vp; 3532 struct nfsnode *np = VTONFS(vp); 3533 3534 kprintf("tag VT_NFS, fileid %lld fsid 0x%x", 3535 (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid); 3536 if (vp->v_type == VFIFO) 3537 fifo_printinfo(vp); 3538 kprintf("\n"); 3539 return (0); 3540 } 3541 3542 /* 3543 * nfs special file access vnode op. 3544 * 3545 * nfs_laccess(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 3546 */ 3547 static int 3548 nfs_laccess(struct vop_access_args *ap) 3549 { 3550 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount); 3551 struct vattr vattr; 3552 int error; 3553 3554 lwkt_gettoken(&nmp->nm_token); 3555 error = VOP_GETATTR(ap->a_vp, &vattr); 3556 if (error == 0) { 3557 error = vop_helper_access(ap, vattr.va_uid, vattr.va_gid, 3558 vattr.va_mode, 0); 3559 } 3560 lwkt_reltoken(&nmp->nm_token); 3561 3562 return (error); 3563 } 3564 3565 /* 3566 * Read wrapper for fifos. 3567 * 3568 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3569 * struct ucred *a_cred) 3570 */ 3571 static int 3572 nfsfifo_read(struct vop_read_args *ap) 3573 { 3574 struct nfsnode *np = VTONFS(ap->a_vp); 3575 3576 /* no token access required */ 3577 /* 3578 * Set access flag. 3579 */ 3580 np->n_flag |= NACC; 3581 getnanotime(&np->n_atim); 3582 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3583 } 3584 3585 /* 3586 * Write wrapper for fifos. 3587 * 3588 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 3589 * struct ucred *a_cred) 3590 */ 3591 static int 3592 nfsfifo_write(struct vop_write_args *ap) 3593 { 3594 struct nfsnode *np = VTONFS(ap->a_vp); 3595 3596 /* no token access required */ 3597 /* 3598 * Set update flag. 3599 */ 3600 np->n_flag |= NUPD; 3601 getnanotime(&np->n_mtim); 3602 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3603 } 3604 3605 /* 3606 * Close wrapper for fifos. 3607 * 3608 * Update the times on the nfsnode then do fifo close. 3609 * 3610 * nfsfifo_close(struct vnode *a_vp, int a_fflag) 3611 */ 3612 static int 3613 nfsfifo_close(struct vop_close_args *ap) 3614 { 3615 struct vnode *vp = ap->a_vp; 3616 struct nfsnode *np = VTONFS(vp); 3617 struct vattr vattr; 3618 struct timespec ts; 3619 3620 /* no token access required */ 3621 3622 vn_lock(vp, LK_UPGRADE | LK_RETRY); /* XXX */ 3623 if (np->n_flag & (NACC | NUPD)) { 3624 getnanotime(&ts); 3625 if (np->n_flag & NACC) 3626 np->n_atim = ts; 3627 if (np->n_flag & NUPD) 3628 np->n_mtim = ts; 3629 np->n_flag |= NCHG; 3630 if (VREFCNT(vp) == 1 && 3631 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3632 VATTR_NULL(&vattr); 3633 if (np->n_flag & NACC) 3634 vattr.va_atime = np->n_atim; 3635 if (np->n_flag & NUPD) 3636 vattr.va_mtime = np->n_mtim; 3637 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE)); 3638 } 3639 } 3640 return (VOCALL(&fifo_vnode_vops, &ap->a_head)); 3641 } 3642 3643