nfs_vnops.c revision 1.230.6.2
1 /* $NetBSD: nfs_vnops.c,v 1.230.6.2 2006/04/22 11:40:16 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.230.6.2 2006/04/22 11:40:16 simonb Exp $"); 43 44 #include "opt_inet.h" 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/disk.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/namei.h> 60 #include <sys/vnode.h> 61 #include <sys/dirent.h> 62 #include <sys/fcntl.h> 63 #include <sys/hash.h> 64 #include <sys/lockf.h> 65 #include <sys/stat.h> 66 #include <sys/unistd.h> 67 68 #include <uvm/uvm_extern.h> 69 #include <uvm/uvm.h> 70 71 #include <miscfs/fifofs/fifo.h> 72 #include <miscfs/genfs/genfs.h> 73 #include <miscfs/specfs/specdev.h> 74 75 #include <nfs/rpcv2.h> 76 #include <nfs/nfsproto.h> 77 #include <nfs/nfs.h> 78 #include <nfs/nfsnode.h> 79 #include <nfs/nfsmount.h> 80 #include <nfs/xdr_subs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 #include <net/if.h> 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 89 /* 90 * Global vfs data structures for nfs 91 */ 92 int (**nfsv2_vnodeop_p) __P((void *)); 93 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 94 { &vop_default_desc, vn_default_error }, 95 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 96 { &vop_create_desc, nfs_create }, /* create */ 97 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 98 { &vop_open_desc, nfs_open }, /* open */ 99 { &vop_close_desc, nfs_close }, /* close */ 100 { &vop_access_desc, nfs_access }, /* access */ 101 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 102 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 103 { &vop_read_desc, nfs_read }, /* read */ 104 { &vop_write_desc, nfs_write }, /* write */ 105 { &vop_lease_desc, nfs_lease_check }, /* lease */ 106 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 107 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 108 { &vop_poll_desc, nfs_poll }, /* poll */ 109 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 110 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 111 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 112 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 113 { &vop_seek_desc, nfs_seek }, /* seek */ 114 { &vop_remove_desc, nfs_remove }, /* remove */ 115 { &vop_link_desc, nfs_link }, /* link */ 116 { &vop_rename_desc, nfs_rename }, /* rename */ 117 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 118 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 119 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 120 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 121 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 122 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 123 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 124 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 125 { &vop_lock_desc, nfs_lock }, /* lock */ 126 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 127 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 128 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 129 { &vop_print_desc, nfs_print }, /* print */ 130 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 131 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 132 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 133 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 134 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 135 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 136 { NULL, NULL } 137 }; 138 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 139 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 140 141 /* 142 * Special device vnode ops 143 */ 144 int (**spec_nfsv2nodeop_p) __P((void *)); 145 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 146 { &vop_default_desc, vn_default_error }, 147 { &vop_lookup_desc, spec_lookup }, /* lookup */ 148 { &vop_create_desc, spec_create }, /* create */ 149 { &vop_mknod_desc, spec_mknod }, /* mknod */ 150 { &vop_open_desc, spec_open }, /* open */ 151 { &vop_close_desc, nfsspec_close }, /* close */ 152 { &vop_access_desc, nfsspec_access }, /* access */ 153 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 154 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 155 { &vop_read_desc, nfsspec_read }, /* read */ 156 { &vop_write_desc, nfsspec_write }, /* write */ 157 { &vop_lease_desc, spec_lease_check }, /* lease */ 158 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 159 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 160 { &vop_poll_desc, spec_poll }, /* poll */ 161 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 162 { &vop_revoke_desc, spec_revoke }, /* revoke */ 163 { &vop_mmap_desc, spec_mmap }, /* mmap */ 164 { &vop_fsync_desc, spec_fsync }, /* fsync */ 165 { &vop_seek_desc, spec_seek }, /* seek */ 166 { &vop_remove_desc, spec_remove }, /* remove */ 167 { &vop_link_desc, spec_link }, /* link */ 168 { &vop_rename_desc, spec_rename }, /* rename */ 169 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 170 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 171 { &vop_symlink_desc, spec_symlink }, /* symlink */ 172 { &vop_readdir_desc, spec_readdir }, /* readdir */ 173 { &vop_readlink_desc, spec_readlink }, /* readlink */ 174 { &vop_abortop_desc, spec_abortop }, /* abortop */ 175 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 176 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 177 { &vop_lock_desc, nfs_lock }, /* lock */ 178 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 179 { &vop_bmap_desc, spec_bmap }, /* bmap */ 180 { &vop_strategy_desc, spec_strategy }, /* strategy */ 181 { &vop_print_desc, nfs_print }, /* print */ 182 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 183 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 184 { &vop_advlock_desc, spec_advlock }, /* advlock */ 185 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 186 { &vop_getpages_desc, spec_getpages }, /* getpages */ 187 { &vop_putpages_desc, spec_putpages }, /* putpages */ 188 { NULL, NULL } 189 }; 190 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 191 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 192 193 int (**fifo_nfsv2nodeop_p) __P((void *)); 194 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 195 { &vop_default_desc, vn_default_error }, 196 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 197 { &vop_create_desc, fifo_create }, /* create */ 198 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 199 { &vop_open_desc, fifo_open }, /* open */ 200 { &vop_close_desc, nfsfifo_close }, /* close */ 201 { &vop_access_desc, nfsspec_access }, /* access */ 202 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 203 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 204 { &vop_read_desc, nfsfifo_read }, /* read */ 205 { &vop_write_desc, nfsfifo_write }, /* write */ 206 { &vop_lease_desc, fifo_lease_check }, /* lease */ 207 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 208 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 209 { &vop_poll_desc, fifo_poll }, /* poll */ 210 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 211 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 212 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 213 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 214 { &vop_seek_desc, fifo_seek }, /* seek */ 215 { &vop_remove_desc, fifo_remove }, /* remove */ 216 { &vop_link_desc, fifo_link }, /* link */ 217 { &vop_rename_desc, fifo_rename }, /* rename */ 218 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 219 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 220 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 221 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 222 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 223 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 224 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 225 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 226 { &vop_lock_desc, nfs_lock }, /* lock */ 227 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 228 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 229 { &vop_strategy_desc, genfs_badop }, /* strategy */ 230 { &vop_print_desc, nfs_print }, /* print */ 231 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 232 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 233 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 234 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 235 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 236 { NULL, NULL } 237 }; 238 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 239 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 240 241 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 242 243 /* 244 * Global variables 245 */ 246 extern u_int32_t nfs_true, nfs_false; 247 extern u_int32_t nfs_xdrneg1; 248 extern const nfstype nfsv3_type[9]; 249 250 int nfs_numasync = 0; 251 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 252 #define UIO_ADVANCE(uio, siz) \ 253 (void)((uio)->uio_resid -= (siz), \ 254 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 255 (uio)->uio_iov->iov_len -= (siz)) 256 257 static void nfs_cache_enter(struct vnode *, struct vnode *, 258 struct componentname *); 259 260 static void 261 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 262 struct componentname *cnp) 263 { 264 struct nfsnode *dnp = VTONFS(dvp); 265 266 if (vp != NULL) { 267 struct nfsnode *np = VTONFS(vp); 268 269 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 270 } 271 272 if (!timespecisset(&dnp->n_nctime)) 273 dnp->n_nctime = dnp->n_vattr->va_mtime; 274 275 cache_enter(dvp, vp, cnp); 276 } 277 278 /* 279 * nfs null call from vfs. 280 */ 281 int 282 nfs_null(vp, cred, l) 283 struct vnode *vp; 284 struct ucred *cred; 285 struct lwp *l; 286 { 287 caddr_t bpos, dpos; 288 int error = 0; 289 struct mbuf *mreq, *mrep, *md, *mb; 290 struct nfsnode *np = VTONFS(vp); 291 292 nfsm_reqhead(np, NFSPROC_NULL, 0); 293 nfsm_request(np, NFSPROC_NULL, l, cred); 294 nfsm_reqdone; 295 return (error); 296 } 297 298 /* 299 * nfs access vnode op. 300 * For nfs version 2, just return ok. File accesses may fail later. 301 * For nfs version 3, use the access rpc to check accessibility. If file modes 302 * are changed on the server, accesses might still fail later. 303 */ 304 int 305 nfs_access(v) 306 void *v; 307 { 308 struct vop_access_args /* { 309 struct vnode *a_vp; 310 int a_mode; 311 struct ucred *a_cred; 312 struct lwp *a_l; 313 } */ *ap = v; 314 struct vnode *vp = ap->a_vp; 315 #ifndef NFS_V2_ONLY 316 u_int32_t *tl; 317 caddr_t cp; 318 int32_t t1, t2; 319 caddr_t bpos, dpos, cp2; 320 int error = 0, attrflag; 321 struct mbuf *mreq, *mrep, *md, *mb; 322 u_int32_t mode, rmode; 323 const int v3 = NFS_ISV3(vp); 324 #endif 325 int cachevalid; 326 struct nfsnode *np = VTONFS(vp); 327 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 328 329 cachevalid = (np->n_accstamp != -1 && 330 (time_uptime - np->n_accstamp) < NFS_ATTRTIMEO(nmp, np) && 331 np->n_accuid == ap->a_cred->cr_uid); 332 333 /* 334 * Check access cache first. If this request has been made for this 335 * uid shortly before, use the cached result. 336 */ 337 if (cachevalid) { 338 if (!np->n_accerror) { 339 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 340 return np->n_accerror; 341 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 342 return np->n_accerror; 343 } 344 345 #ifndef NFS_V2_ONLY 346 /* 347 * For nfs v3, 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, but 351 * this is better than just returning anything that is lying about 352 * in the cache. 353 */ 354 if (v3) { 355 nfsstats.rpccnt[NFSPROC_ACCESS]++; 356 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 357 nfsm_fhtom(np, v3); 358 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 359 if (ap->a_mode & VREAD) 360 mode = NFSV3ACCESS_READ; 361 else 362 mode = 0; 363 if (vp->v_type != VDIR) { 364 if (ap->a_mode & VWRITE) 365 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 366 if (ap->a_mode & VEXEC) 367 mode |= NFSV3ACCESS_EXECUTE; 368 } else { 369 if (ap->a_mode & VWRITE) 370 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 371 NFSV3ACCESS_DELETE); 372 if (ap->a_mode & VEXEC) 373 mode |= NFSV3ACCESS_LOOKUP; 374 } 375 *tl = txdr_unsigned(mode); 376 nfsm_request(np, NFSPROC_ACCESS, ap->a_l, ap->a_cred); 377 nfsm_postop_attr(vp, attrflag, 0); 378 if (!error) { 379 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 380 rmode = fxdr_unsigned(u_int32_t, *tl); 381 /* 382 * The NFS V3 spec does not clarify whether or not 383 * the returned access bits can be a superset of 384 * the ones requested, so... 385 */ 386 if ((rmode & mode) != mode) 387 error = EACCES; 388 } 389 nfsm_reqdone; 390 } else 391 #endif 392 return (nfsspec_access(ap)); 393 #ifndef NFS_V2_ONLY 394 /* 395 * Disallow write attempts on filesystems mounted read-only; 396 * unless the file is a socket, fifo, or a block or character 397 * device resident on the filesystem. 398 */ 399 if (!error && (ap->a_mode & VWRITE) && 400 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 401 switch (vp->v_type) { 402 case VREG: 403 case VDIR: 404 case VLNK: 405 error = EROFS; 406 default: 407 break; 408 } 409 } 410 411 if (!error || error == EACCES) { 412 /* 413 * If we got the same result as for a previous, 414 * different request, OR it in. Don't update 415 * the timestamp in that case. 416 */ 417 if (cachevalid && np->n_accstamp != -1 && 418 error == np->n_accerror) { 419 if (!error) 420 np->n_accmode |= ap->a_mode; 421 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 422 np->n_accmode = ap->a_mode; 423 } else { 424 np->n_accstamp = time_uptime; 425 np->n_accuid = ap->a_cred->cr_uid; 426 np->n_accmode = ap->a_mode; 427 np->n_accerror = error; 428 } 429 } 430 431 return (error); 432 #endif 433 } 434 435 /* 436 * nfs open vnode op 437 * Check to see if the type is ok 438 * and that deletion is not in progress. 439 * For paged in text files, you will need to flush the page cache 440 * if consistency is lost. 441 */ 442 /* ARGSUSED */ 443 int 444 nfs_open(v) 445 void *v; 446 { 447 struct vop_open_args /* { 448 struct vnode *a_vp; 449 int a_mode; 450 struct ucred *a_cred; 451 struct lwp *a_l; 452 } */ *ap = v; 453 struct vnode *vp = ap->a_vp; 454 struct nfsnode *np = VTONFS(vp); 455 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 456 int error; 457 458 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 459 return (EACCES); 460 } 461 462 if (ap->a_mode & FREAD) { 463 if (np->n_rcred != NULL) 464 crfree(np->n_rcred); 465 np->n_rcred = ap->a_cred; 466 crhold(np->n_rcred); 467 } 468 if (ap->a_mode & FWRITE) { 469 if (np->n_wcred != NULL) 470 crfree(np->n_wcred); 471 np->n_wcred = ap->a_cred; 472 crhold(np->n_wcred); 473 } 474 475 #ifndef NFS_V2_ONLY 476 /* 477 * Get a valid lease. If cached data is stale, flush it. 478 */ 479 if (nmp->nm_flag & NFSMNT_NQNFS) { 480 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 481 do { 482 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 483 ap->a_l); 484 } while (error == NQNFS_EXPIRED); 485 if (error) 486 return (error); 487 if (np->n_lrev != np->n_brev || 488 (np->n_flag & NQNFSNONCACHE)) { 489 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 490 ap->a_l, 1)) == EINTR) 491 return (error); 492 np->n_brev = np->n_lrev; 493 } 494 } 495 } else 496 #endif 497 { 498 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_l, 0); 499 if (error) 500 return error; 501 } 502 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 503 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 504 return (0); 505 } 506 507 /* 508 * nfs close vnode op 509 * What an NFS client should do upon close after writing is a debatable issue. 510 * Most NFS clients push delayed writes to the server upon close, basically for 511 * two reasons: 512 * 1 - So that any write errors may be reported back to the client process 513 * doing the close system call. By far the two most likely errors are 514 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 515 * 2 - To put a worst case upper bound on cache inconsistency between 516 * multiple clients for the file. 517 * There is also a consistency problem for Version 2 of the protocol w.r.t. 518 * not being able to tell if other clients are writing a file concurrently, 519 * since there is no way of knowing if the changed modify time in the reply 520 * is only due to the write for this client. 521 * (NFS Version 3 provides weak cache consistency data in the reply that 522 * should be sufficient to detect and handle this case.) 523 * 524 * The current code does the following: 525 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 526 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 527 * or commit them (this satisfies 1 and 2 except for the 528 * case where the server crashes after this close but 529 * before the commit RPC, which is felt to be "good 530 * enough". Changing the last argument to nfs_flush() to 531 * a 1 would force a commit operation, if it is felt a 532 * commit is necessary now. 533 * for NQNFS - do nothing now, since 2 is dealt with via leases and 534 * 1 should be dealt with via an fsync() system call for 535 * cases where write errors are important. 536 */ 537 /* ARGSUSED */ 538 int 539 nfs_close(v) 540 void *v; 541 { 542 struct vop_close_args /* { 543 struct vnodeop_desc *a_desc; 544 struct vnode *a_vp; 545 int a_fflag; 546 struct ucred *a_cred; 547 struct lwp *a_l; 548 } */ *ap = v; 549 struct vnode *vp = ap->a_vp; 550 struct nfsnode *np = VTONFS(vp); 551 int error = 0; 552 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 553 554 if (vp->v_type == VREG) { 555 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 556 (np->n_flag & NMODIFIED)) { 557 #ifndef NFS_V2_ONLY 558 if (NFS_ISV3(vp)) { 559 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_l, 0); 560 np->n_flag &= ~NMODIFIED; 561 } else 562 #endif 563 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_l, 1); 564 NFS_INVALIDATE_ATTRCACHE(np); 565 } 566 if (np->n_flag & NWRITEERR) { 567 np->n_flag &= ~NWRITEERR; 568 error = np->n_error; 569 } 570 } 571 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 572 return (error); 573 } 574 575 /* 576 * nfs getattr call from vfs. 577 */ 578 int 579 nfs_getattr(v) 580 void *v; 581 { 582 struct vop_getattr_args /* { 583 struct vnode *a_vp; 584 struct vattr *a_vap; 585 struct ucred *a_cred; 586 struct lwp *a_l; 587 } */ *ap = v; 588 struct vnode *vp = ap->a_vp; 589 struct nfsnode *np = VTONFS(vp); 590 caddr_t cp; 591 u_int32_t *tl; 592 int32_t t1, t2; 593 caddr_t bpos, dpos; 594 int error = 0; 595 struct mbuf *mreq, *mrep, *md, *mb; 596 const int v3 = NFS_ISV3(vp); 597 598 /* 599 * Update local times for special files. 600 */ 601 if (np->n_flag & (NACC | NUPD)) 602 np->n_flag |= NCHG; 603 604 /* 605 * if we have delayed truncation, do it now. 606 */ 607 nfs_delayedtruncate(vp); 608 609 /* 610 * First look in the cache. 611 */ 612 if (nfs_getattrcache(vp, ap->a_vap) == 0) 613 return (0); 614 nfsstats.rpccnt[NFSPROC_GETATTR]++; 615 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 616 nfsm_fhtom(np, v3); 617 nfsm_request(np, NFSPROC_GETATTR, ap->a_l, ap->a_cred); 618 if (!error) { 619 nfsm_loadattr(vp, ap->a_vap, 0); 620 if (vp->v_type == VDIR && 621 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 622 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 623 } 624 nfsm_reqdone; 625 return (error); 626 } 627 628 /* 629 * nfs setattr call. 630 */ 631 int 632 nfs_setattr(v) 633 void *v; 634 { 635 struct vop_setattr_args /* { 636 struct vnodeop_desc *a_desc; 637 struct vnode *a_vp; 638 struct vattr *a_vap; 639 struct ucred *a_cred; 640 struct lwp *a_l; 641 } */ *ap = v; 642 struct vnode *vp = ap->a_vp; 643 struct nfsnode *np = VTONFS(vp); 644 struct vattr *vap = ap->a_vap; 645 int error = 0; 646 u_quad_t tsize = 0; 647 648 /* 649 * Setting of flags is not supported. 650 */ 651 if (vap->va_flags != VNOVAL) 652 return (EOPNOTSUPP); 653 654 /* 655 * Disallow write attempts if the filesystem is mounted read-only. 656 */ 657 if ((vap->va_uid != (uid_t)VNOVAL || 658 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 659 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 660 (vp->v_mount->mnt_flag & MNT_RDONLY)) 661 return (EROFS); 662 if (vap->va_size != VNOVAL) { 663 switch (vp->v_type) { 664 case VDIR: 665 return (EISDIR); 666 case VCHR: 667 case VBLK: 668 case VSOCK: 669 case VFIFO: 670 if (vap->va_mtime.tv_sec == VNOVAL && 671 vap->va_atime.tv_sec == VNOVAL && 672 vap->va_mode == (mode_t)VNOVAL && 673 vap->va_uid == (uid_t)VNOVAL && 674 vap->va_gid == (gid_t)VNOVAL) 675 return (0); 676 vap->va_size = VNOVAL; 677 break; 678 default: 679 /* 680 * Disallow write attempts if the filesystem is 681 * mounted read-only. 682 */ 683 if (vp->v_mount->mnt_flag & MNT_RDONLY) 684 return (EROFS); 685 uvm_vnp_setsize(vp, vap->va_size); 686 tsize = np->n_size; 687 np->n_size = vap->va_size; 688 if (vap->va_size == 0) 689 error = nfs_vinvalbuf(vp, 0, 690 ap->a_cred, ap->a_l, 1); 691 else 692 error = nfs_vinvalbuf(vp, V_SAVE, 693 ap->a_cred, ap->a_l, 1); 694 if (error) { 695 uvm_vnp_setsize(vp, tsize); 696 return (error); 697 } 698 np->n_vattr->va_size = vap->va_size; 699 } 700 } else if ((vap->va_mtime.tv_sec != VNOVAL || 701 vap->va_atime.tv_sec != VNOVAL) && 702 vp->v_type == VREG && 703 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 704 ap->a_l, 1)) == EINTR) 705 return (error); 706 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_l); 707 if (error && vap->va_size != VNOVAL) { 708 np->n_size = np->n_vattr->va_size = tsize; 709 uvm_vnp_setsize(vp, np->n_size); 710 } 711 VN_KNOTE(vp, NOTE_ATTRIB); 712 return (error); 713 } 714 715 /* 716 * Do an nfs setattr rpc. 717 */ 718 int 719 nfs_setattrrpc(vp, vap, cred, l) 720 struct vnode *vp; 721 struct vattr *vap; 722 struct ucred *cred; 723 struct lwp *l; 724 { 725 struct nfsv2_sattr *sp; 726 caddr_t cp; 727 int32_t t1, t2; 728 caddr_t bpos, dpos; 729 u_int32_t *tl; 730 int error = 0; 731 struct mbuf *mreq, *mrep, *md, *mb; 732 const int v3 = NFS_ISV3(vp); 733 struct nfsnode *np = VTONFS(vp); 734 #ifndef NFS_V2_ONLY 735 int wccflag = NFSV3_WCCRATTR; 736 caddr_t cp2; 737 #endif 738 739 nfsstats.rpccnt[NFSPROC_SETATTR]++; 740 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 741 nfsm_fhtom(np, v3); 742 #ifndef NFS_V2_ONLY 743 if (v3) { 744 nfsm_v3attrbuild(vap, TRUE); 745 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 746 *tl = nfs_false; 747 } else { 748 #endif 749 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 750 if (vap->va_mode == (mode_t)VNOVAL) 751 sp->sa_mode = nfs_xdrneg1; 752 else 753 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 754 if (vap->va_uid == (uid_t)VNOVAL) 755 sp->sa_uid = nfs_xdrneg1; 756 else 757 sp->sa_uid = txdr_unsigned(vap->va_uid); 758 if (vap->va_gid == (gid_t)VNOVAL) 759 sp->sa_gid = nfs_xdrneg1; 760 else 761 sp->sa_gid = txdr_unsigned(vap->va_gid); 762 sp->sa_size = txdr_unsigned(vap->va_size); 763 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 764 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 765 #ifndef NFS_V2_ONLY 766 } 767 #endif 768 nfsm_request(np, NFSPROC_SETATTR, l, cred); 769 #ifndef NFS_V2_ONLY 770 if (v3) { 771 nfsm_wcc_data(vp, wccflag, 0, FALSE); 772 } else 773 #endif 774 nfsm_loadattr(vp, (struct vattr *)0, 0); 775 nfsm_reqdone; 776 return (error); 777 } 778 779 /* 780 * nfs lookup call, one step at a time... 781 * First look in cache 782 * If not found, unlock the directory nfsnode and do the rpc 783 * 784 * This code is full of lock/unlock statements and checks, because 785 * we continue after cache_lookup has finished (we need to check 786 * with the attr cache and do an rpc if it has timed out). This means 787 * that the locking effects of cache_lookup have to be taken into 788 * account. 789 */ 790 int 791 nfs_lookup(v) 792 void *v; 793 { 794 struct vop_lookup_args /* { 795 struct vnodeop_desc *a_desc; 796 struct vnode *a_dvp; 797 struct vnode **a_vpp; 798 struct componentname *a_cnp; 799 } */ *ap = v; 800 struct componentname *cnp = ap->a_cnp; 801 struct vnode *dvp = ap->a_dvp; 802 struct vnode **vpp = ap->a_vpp; 803 int flags; 804 struct vnode *newvp; 805 u_int32_t *tl; 806 caddr_t cp; 807 int32_t t1, t2; 808 caddr_t bpos, dpos, cp2; 809 struct mbuf *mreq, *mrep, *md, *mb; 810 long len; 811 nfsfh_t *fhp; 812 struct nfsnode *np; 813 int lockparent, wantparent, error = 0, attrflag, fhsize; 814 const int v3 = NFS_ISV3(dvp); 815 816 cnp->cn_flags &= ~PDIRUNLOCK; 817 flags = cnp->cn_flags; 818 819 *vpp = NULLVP; 820 newvp = NULLVP; 821 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 822 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 823 return (EROFS); 824 if (dvp->v_type != VDIR) 825 return (ENOTDIR); 826 827 /* 828 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 829 */ 830 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 831 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 832 if (error) 833 return error; 834 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 835 return EISDIR; 836 VREF(dvp); 837 *vpp = dvp; 838 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 839 cnp->cn_flags |= SAVENAME; 840 return 0; 841 } 842 843 lockparent = flags & LOCKPARENT; 844 wantparent = flags & (LOCKPARENT|WANTPARENT); 845 np = VTONFS(dvp); 846 847 /* 848 * Before tediously performing a linear scan of the directory, 849 * check the name cache to see if the directory/name pair 850 * we are looking for is known already. 851 * If the directory/name pair is found in the name cache, 852 * we have to ensure the directory has not changed from 853 * the time the cache entry has been created. If it has, 854 * the cache entry has to be ignored. 855 */ 856 error = cache_lookup_raw(dvp, vpp, cnp); 857 KASSERT(dvp != *vpp); 858 if (error >= 0) { 859 struct vattr vattr; 860 int err2; 861 862 if (error && error != ENOENT) { 863 *vpp = NULLVP; 864 return error; 865 } 866 867 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 868 if (err2 != 0) { 869 if (error == 0) 870 vrele(*vpp); 871 *vpp = NULLVP; 872 return err2; 873 } 874 875 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 876 cnp->cn_lwp) || timespeccmp(&vattr.va_mtime, 877 &VTONFS(dvp)->n_nctime, !=)) { 878 if (error == 0) { 879 vrele(*vpp); 880 *vpp = NULLVP; 881 } 882 cache_purge1(dvp, NULL, PURGE_CHILDREN); 883 timespecclear(&np->n_nctime); 884 goto dorpc; 885 } 886 887 if (error == ENOENT) { 888 goto noentry; 889 } 890 891 newvp = *vpp; 892 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp) 893 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 894 nfsstats.lookupcache_hits++; 895 if ((flags & ISDOTDOT) != 0 || 896 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 897 VOP_UNLOCK(dvp, 0); 898 cnp->cn_flags |= PDIRUNLOCK; 899 } 900 error = vn_lock(newvp, LK_EXCLUSIVE); 901 if (error) { 902 /* newvp has been revoked. */ 903 vrele(newvp); 904 *vpp = NULL; 905 return error; 906 } 907 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 908 && (cnp->cn_flags & PDIRUNLOCK)) { 909 KASSERT(flags & ISDOTDOT); 910 error = vn_lock(dvp, LK_EXCLUSIVE); 911 if (error) { 912 vput(newvp); 913 *vpp = NULL; 914 return error; 915 } 916 cnp->cn_flags &= ~PDIRUNLOCK; 917 } 918 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 919 cnp->cn_flags |= SAVENAME; 920 KASSERT(newvp->v_type != VNON); 921 return (0); 922 } 923 cache_purge1(newvp, NULL, PURGE_PARENTS); 924 vrele(newvp); 925 *vpp = NULLVP; 926 } 927 dorpc: 928 #if 0 929 /* 930 * because nfsv3 has the same CREATE semantics as ours, 931 * we don't have to perform LOOKUPs beforehand. 932 * 933 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 934 * XXX although we have no way to know if O_EXCL is requested or not. 935 */ 936 937 if (v3 && cnp->cn_nameiop == CREATE && 938 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 939 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 940 KASSERT(lockparent); 941 cnp->cn_flags |= SAVENAME; 942 return (EJUSTRETURN); 943 } 944 #endif /* 0 */ 945 946 error = 0; 947 newvp = NULLVP; 948 nfsstats.lookupcache_misses++; 949 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 950 len = cnp->cn_namelen; 951 nfsm_reqhead(np, NFSPROC_LOOKUP, 952 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 953 nfsm_fhtom(np, v3); 954 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 955 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_lwp, cnp->cn_cred); 956 if (error) { 957 nfsm_postop_attr(dvp, attrflag, 0); 958 m_freem(mrep); 959 goto nfsmout; 960 } 961 nfsm_getfh(fhp, fhsize, v3); 962 963 /* 964 * Handle RENAME case... 965 */ 966 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 967 if (NFS_CMPFH(np, fhp, fhsize)) { 968 m_freem(mrep); 969 return (EISDIR); 970 } 971 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 972 if (error) { 973 m_freem(mrep); 974 return error; 975 } 976 newvp = NFSTOV(np); 977 #ifndef NFS_V2_ONLY 978 if (v3) { 979 nfsm_postop_attr(newvp, attrflag, 0); 980 nfsm_postop_attr(dvp, attrflag, 0); 981 } else 982 #endif 983 nfsm_loadattr(newvp, (struct vattr *)0, 0); 984 *vpp = newvp; 985 m_freem(mrep); 986 cnp->cn_flags |= SAVENAME; 987 if (!lockparent) { 988 VOP_UNLOCK(dvp, 0); 989 cnp->cn_flags |= PDIRUNLOCK; 990 } 991 goto validate; 992 } 993 994 /* 995 * The postop attr handling is duplicated for each if case, 996 * because it should be done while dvp is locked (unlocking 997 * dvp is different for each case). 998 */ 999 1000 if (NFS_CMPFH(np, fhp, fhsize)) { 1001 /* 1002 * "." lookup 1003 */ 1004 VREF(dvp); 1005 newvp = dvp; 1006 #ifndef NFS_V2_ONLY 1007 if (v3) { 1008 nfsm_postop_attr(newvp, attrflag, 0); 1009 nfsm_postop_attr(dvp, attrflag, 0); 1010 } else 1011 #endif 1012 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1013 } else if (flags & ISDOTDOT) { 1014 /* 1015 * ".." lookup 1016 */ 1017 VOP_UNLOCK(dvp, 0); 1018 cnp->cn_flags |= PDIRUNLOCK; 1019 1020 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1021 if (error) { 1022 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1023 cnp->cn_flags &= ~PDIRUNLOCK; 1024 m_freem(mrep); 1025 return error; 1026 } 1027 newvp = NFSTOV(np); 1028 1029 #ifndef NFS_V2_ONLY 1030 if (v3) { 1031 nfsm_postop_attr(newvp, attrflag, 0); 1032 nfsm_postop_attr(dvp, attrflag, 0); 1033 } else 1034 #endif 1035 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1036 1037 if (lockparent && (flags & ISLASTCN)) { 1038 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1039 m_freem(mrep); 1040 vput(newvp); 1041 return error; 1042 } 1043 cnp->cn_flags &= ~PDIRUNLOCK; 1044 } 1045 } else { 1046 /* 1047 * Other lookups. 1048 */ 1049 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1050 if (error) { 1051 m_freem(mrep); 1052 return error; 1053 } 1054 newvp = NFSTOV(np); 1055 #ifndef NFS_V2_ONLY 1056 if (v3) { 1057 nfsm_postop_attr(newvp, attrflag, 0); 1058 nfsm_postop_attr(dvp, attrflag, 0); 1059 } else 1060 #endif 1061 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1062 if (!lockparent || !(flags & ISLASTCN)) { 1063 VOP_UNLOCK(dvp, 0); 1064 cnp->cn_flags |= PDIRUNLOCK; 1065 } 1066 } 1067 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1068 cnp->cn_flags |= SAVENAME; 1069 if ((cnp->cn_flags & MAKEENTRY) && 1070 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1071 nfs_cache_enter(dvp, newvp, cnp); 1072 } 1073 *vpp = newvp; 1074 nfsm_reqdone; 1075 if (error) { 1076 /* 1077 * We get here only because of errors returned by 1078 * the RPC. Otherwise we'll have returned above 1079 * (the nfsm_* macros will jump to nfsm_reqdone 1080 * on error). 1081 */ 1082 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1083 cnp->cn_nameiop != CREATE) { 1084 nfs_cache_enter(dvp, NULL, cnp); 1085 } 1086 if (newvp != NULLVP) { 1087 vrele(newvp); 1088 if (newvp != dvp) 1089 VOP_UNLOCK(newvp, 0); 1090 } 1091 noentry: 1092 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1093 (flags & ISLASTCN) && error == ENOENT) { 1094 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1095 error = EROFS; 1096 } else { 1097 error = EJUSTRETURN; 1098 cnp->cn_flags |= SAVENAME; 1099 } 1100 } 1101 *vpp = NULL; 1102 return error; 1103 } 1104 1105 validate: 1106 /* 1107 * make sure we have valid type and size. 1108 */ 1109 1110 newvp = *vpp; 1111 if (newvp->v_type == VNON) { 1112 struct vattr vattr; /* dummy */ 1113 1114 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1115 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp); 1116 if (error) { 1117 vput(newvp); 1118 *vpp = NULL; 1119 } 1120 } 1121 1122 return error; 1123 } 1124 1125 /* 1126 * nfs read call. 1127 * Just call nfs_bioread() to do the work. 1128 */ 1129 int 1130 nfs_read(v) 1131 void *v; 1132 { 1133 struct vop_read_args /* { 1134 struct vnode *a_vp; 1135 struct uio *a_uio; 1136 int a_ioflag; 1137 struct ucred *a_cred; 1138 } */ *ap = v; 1139 struct vnode *vp = ap->a_vp; 1140 1141 if (vp->v_type != VREG) 1142 return EISDIR; 1143 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1144 } 1145 1146 /* 1147 * nfs readlink call 1148 */ 1149 int 1150 nfs_readlink(v) 1151 void *v; 1152 { 1153 struct vop_readlink_args /* { 1154 struct vnode *a_vp; 1155 struct uio *a_uio; 1156 struct ucred *a_cred; 1157 } */ *ap = v; 1158 struct vnode *vp = ap->a_vp; 1159 struct nfsnode *np = VTONFS(vp); 1160 1161 if (vp->v_type != VLNK) 1162 return (EPERM); 1163 1164 if (np->n_rcred != NULL) { 1165 crfree(np->n_rcred); 1166 } 1167 np->n_rcred = ap->a_cred; 1168 crhold(np->n_rcred); 1169 1170 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1171 } 1172 1173 /* 1174 * Do a readlink rpc. 1175 * Called by nfs_doio() from below the buffer cache. 1176 */ 1177 int 1178 nfs_readlinkrpc(vp, uiop, cred) 1179 struct vnode *vp; 1180 struct uio *uiop; 1181 struct ucred *cred; 1182 { 1183 u_int32_t *tl; 1184 caddr_t cp; 1185 int32_t t1, t2; 1186 caddr_t bpos, dpos, cp2; 1187 int error = 0; 1188 uint32_t len; 1189 struct mbuf *mreq, *mrep, *md, *mb; 1190 const int v3 = NFS_ISV3(vp); 1191 struct nfsnode *np = VTONFS(vp); 1192 #ifndef NFS_V2_ONLY 1193 int attrflag; 1194 #endif 1195 1196 nfsstats.rpccnt[NFSPROC_READLINK]++; 1197 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1198 nfsm_fhtom(np, v3); 1199 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1200 #ifndef NFS_V2_ONLY 1201 if (v3) 1202 nfsm_postop_attr(vp, attrflag, 0); 1203 #endif 1204 if (!error) { 1205 #ifndef NFS_V2_ONLY 1206 if (v3) { 1207 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1208 len = fxdr_unsigned(uint32_t, *tl); 1209 if (len > MAXPATHLEN) { 1210 /* 1211 * this pathname is too long for us. 1212 */ 1213 m_freem(mrep); 1214 /* Solaris returns EINVAL. should we follow? */ 1215 error = ENAMETOOLONG; 1216 goto nfsmout; 1217 } 1218 } else 1219 #endif 1220 { 1221 nfsm_strsiz(len, NFS_MAXPATHLEN); 1222 } 1223 nfsm_mtouio(uiop, len); 1224 } 1225 nfsm_reqdone; 1226 return (error); 1227 } 1228 1229 /* 1230 * nfs read rpc call 1231 * Ditto above 1232 */ 1233 int 1234 nfs_readrpc(vp, uiop) 1235 struct vnode *vp; 1236 struct uio *uiop; 1237 { 1238 u_int32_t *tl; 1239 caddr_t cp; 1240 int32_t t1, t2; 1241 caddr_t bpos, dpos, cp2; 1242 struct mbuf *mreq, *mrep, *md, *mb; 1243 struct nfsmount *nmp; 1244 int error = 0, len, retlen, tsiz, eof, byte_count; 1245 const int v3 = NFS_ISV3(vp); 1246 struct nfsnode *np = VTONFS(vp); 1247 #ifndef NFS_V2_ONLY 1248 int attrflag; 1249 #endif 1250 1251 #ifndef nolint 1252 eof = 0; 1253 #endif 1254 nmp = VFSTONFS(vp->v_mount); 1255 tsiz = uiop->uio_resid; 1256 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1257 return (EFBIG); 1258 iostat_busy(nmp->nm_stats); 1259 byte_count = 0; /* count bytes actually transferred */ 1260 while (tsiz > 0) { 1261 nfsstats.rpccnt[NFSPROC_READ]++; 1262 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1263 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1264 nfsm_fhtom(np, v3); 1265 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1266 #ifndef NFS_V2_ONLY 1267 if (v3) { 1268 txdr_hyper(uiop->uio_offset, tl); 1269 *(tl + 2) = txdr_unsigned(len); 1270 } else 1271 #endif 1272 { 1273 *tl++ = txdr_unsigned(uiop->uio_offset); 1274 *tl++ = txdr_unsigned(len); 1275 *tl = 0; 1276 } 1277 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1278 #ifndef NFS_V2_ONLY 1279 if (v3) { 1280 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1281 if (error) { 1282 m_freem(mrep); 1283 goto nfsmout; 1284 } 1285 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1286 eof = fxdr_unsigned(int, *(tl + 1)); 1287 } else 1288 #endif 1289 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1290 nfsm_strsiz(retlen, nmp->nm_rsize); 1291 nfsm_mtouio(uiop, retlen); 1292 m_freem(mrep); 1293 tsiz -= retlen; 1294 byte_count += retlen; 1295 #ifndef NFS_V2_ONLY 1296 if (v3) { 1297 if (eof || retlen == 0) 1298 tsiz = 0; 1299 } else 1300 #endif 1301 if (retlen < len) 1302 tsiz = 0; 1303 } 1304 nfsmout: 1305 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1306 return (error); 1307 } 1308 1309 struct nfs_writerpc_context { 1310 struct simplelock nwc_slock; 1311 volatile int nwc_mbufcount; 1312 }; 1313 1314 /* 1315 * free mbuf used to refer protected pages while write rpc call. 1316 * called at splvm. 1317 */ 1318 static void 1319 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf, size_t size, void *arg) 1320 { 1321 struct nfs_writerpc_context *ctx = arg; 1322 1323 KASSERT(m != NULL); 1324 KASSERT(ctx != NULL); 1325 pool_cache_put(&mbpool_cache, m); 1326 simple_lock(&ctx->nwc_slock); 1327 if (--ctx->nwc_mbufcount == 0) { 1328 wakeup(ctx); 1329 } 1330 simple_unlock(&ctx->nwc_slock); 1331 } 1332 1333 /* 1334 * nfs write call 1335 */ 1336 int 1337 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1338 struct vnode *vp; 1339 struct uio *uiop; 1340 int *iomode; 1341 boolean_t pageprotected; 1342 boolean_t *stalewriteverfp; 1343 { 1344 u_int32_t *tl; 1345 caddr_t cp; 1346 int32_t t1, t2; 1347 caddr_t bpos, dpos; 1348 struct mbuf *mreq, *mrep, *md, *mb; 1349 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1350 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1351 const int v3 = NFS_ISV3(vp); 1352 int committed = NFSV3WRITE_FILESYNC; 1353 struct nfsnode *np = VTONFS(vp); 1354 struct nfs_writerpc_context ctx; 1355 int s, byte_count; 1356 struct lwp *l = NULL; 1357 size_t origresid; 1358 #ifndef NFS_V2_ONLY 1359 caddr_t cp2; 1360 int rlen, commit; 1361 #endif 1362 1363 simple_lock_init(&ctx.nwc_slock); 1364 ctx.nwc_mbufcount = 1; 1365 1366 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1367 panic("writerpc readonly vp %p", vp); 1368 } 1369 1370 #ifdef DIAGNOSTIC 1371 if (uiop->uio_iovcnt != 1) 1372 panic("nfs: writerpc iovcnt > 1"); 1373 #endif 1374 tsiz = uiop->uio_resid; 1375 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1376 return (EFBIG); 1377 if (pageprotected) { 1378 l = curlwp; 1379 PHOLD(l); 1380 } 1381 retry: 1382 origresid = uiop->uio_resid; 1383 KASSERT(origresid == uiop->uio_iov->iov_len); 1384 iostat_busy(nmp->nm_stats); 1385 byte_count = 0; /* count of bytes actually written */ 1386 while (tsiz > 0) { 1387 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1388 uint32_t backup; 1389 boolean_t stalewriteverf = FALSE; 1390 1391 nfsstats.rpccnt[NFSPROC_WRITE]++; 1392 len = min(tsiz, nmp->nm_wsize); 1393 datalen = pageprotected ? 0 : nfsm_rndup(len); 1394 nfsm_reqhead(np, NFSPROC_WRITE, 1395 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1396 nfsm_fhtom(np, v3); 1397 #ifndef NFS_V2_ONLY 1398 if (v3) { 1399 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1400 txdr_hyper(uiop->uio_offset, tl); 1401 tl += 2; 1402 *tl++ = txdr_unsigned(len); 1403 *tl++ = txdr_unsigned(*iomode); 1404 *tl = txdr_unsigned(len); 1405 } else 1406 #endif 1407 { 1408 u_int32_t x; 1409 1410 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1411 /* Set both "begin" and "current" to non-garbage. */ 1412 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1413 *tl++ = x; /* "begin offset" */ 1414 *tl++ = x; /* "current offset" */ 1415 x = txdr_unsigned(len); 1416 *tl++ = x; /* total to this offset */ 1417 *tl = x; /* size of this write */ 1418 1419 } 1420 if (pageprotected) { 1421 /* 1422 * since we know pages can't be modified during i/o, 1423 * no need to copy them for us. 1424 */ 1425 struct mbuf *m; 1426 struct iovec *iovp = uiop->uio_iov; 1427 1428 m = m_get(M_WAIT, MT_DATA); 1429 MCLAIM(m, &nfs_mowner); 1430 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1431 nfs_writerpc_extfree, &ctx); 1432 m->m_flags |= M_EXT_ROMAP; 1433 m->m_len = len; 1434 mb->m_next = m; 1435 /* 1436 * no need to maintain mb and bpos here 1437 * because no one care them later. 1438 */ 1439 #if 0 1440 mb = m; 1441 bpos = mtod(caddr_t, mb) + mb->m_len; 1442 #endif 1443 UIO_ADVANCE(uiop, len); 1444 uiop->uio_offset += len; 1445 s = splvm(); 1446 simple_lock(&ctx.nwc_slock); 1447 ctx.nwc_mbufcount++; 1448 simple_unlock(&ctx.nwc_slock); 1449 splx(s); 1450 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1451 } else { 1452 nfsm_uiotom(uiop, len); 1453 } 1454 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1455 #ifndef NFS_V2_ONLY 1456 if (v3) { 1457 wccflag = NFSV3_WCCCHK; 1458 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1459 if (!error) { 1460 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1461 + NFSX_V3WRITEVERF); 1462 rlen = fxdr_unsigned(int, *tl++); 1463 if (rlen == 0) { 1464 error = NFSERR_IO; 1465 m_freem(mrep); 1466 break; 1467 } else if (rlen < len) { 1468 backup = len - rlen; 1469 UIO_ADVANCE(uiop, -backup); 1470 uiop->uio_offset -= backup; 1471 len = rlen; 1472 } 1473 commit = fxdr_unsigned(int, *tl++); 1474 1475 /* 1476 * Return the lowest committment level 1477 * obtained by any of the RPCs. 1478 */ 1479 if (committed == NFSV3WRITE_FILESYNC) 1480 committed = commit; 1481 else if (committed == NFSV3WRITE_DATASYNC && 1482 commit == NFSV3WRITE_UNSTABLE) 1483 committed = commit; 1484 simple_lock(&nmp->nm_slock); 1485 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1486 memcpy(nmp->nm_writeverf, tl, 1487 NFSX_V3WRITEVERF); 1488 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1489 } else if ((nmp->nm_iflag & 1490 NFSMNT_STALEWRITEVERF) || 1491 memcmp(tl, nmp->nm_writeverf, 1492 NFSX_V3WRITEVERF)) { 1493 memcpy(nmp->nm_writeverf, tl, 1494 NFSX_V3WRITEVERF); 1495 /* 1496 * note NFSMNT_STALEWRITEVERF 1497 * if we're the first thread to 1498 * notice it. 1499 */ 1500 if ((nmp->nm_iflag & 1501 NFSMNT_STALEWRITEVERF) == 0) { 1502 stalewriteverf = TRUE; 1503 nmp->nm_iflag |= 1504 NFSMNT_STALEWRITEVERF; 1505 } 1506 } 1507 simple_unlock(&nmp->nm_slock); 1508 } 1509 } else 1510 #endif 1511 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1512 if (wccflag) 1513 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1514 m_freem(mrep); 1515 if (error) 1516 break; 1517 tsiz -= len; 1518 byte_count += len; 1519 if (stalewriteverf) { 1520 *stalewriteverfp = TRUE; 1521 stalewriteverf = FALSE; 1522 if (committed == NFSV3WRITE_UNSTABLE && 1523 len != origresid) { 1524 /* 1525 * if our write requests weren't atomic but 1526 * unstable, datas in previous iterations 1527 * might have already been lost now. 1528 * then, we should resend them to nfsd. 1529 */ 1530 backup = origresid - tsiz; 1531 UIO_ADVANCE(uiop, -backup); 1532 uiop->uio_offset -= backup; 1533 tsiz = origresid; 1534 goto retry; 1535 } 1536 } 1537 } 1538 nfsmout: 1539 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1540 if (pageprotected) { 1541 /* 1542 * wait until mbufs go away. 1543 * retransmitted mbufs can survive longer than rpc requests 1544 * themselves. 1545 */ 1546 s = splvm(); 1547 simple_lock(&ctx.nwc_slock); 1548 ctx.nwc_mbufcount--; 1549 while (ctx.nwc_mbufcount > 0) { 1550 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1551 } 1552 simple_unlock(&ctx.nwc_slock); 1553 splx(s); 1554 PRELE(l); 1555 } 1556 *iomode = committed; 1557 if (error) 1558 uiop->uio_resid = tsiz; 1559 return (error); 1560 } 1561 1562 /* 1563 * nfs mknod rpc 1564 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1565 * mode set to specify the file type and the size field for rdev. 1566 */ 1567 int 1568 nfs_mknodrpc(dvp, vpp, cnp, vap) 1569 struct vnode *dvp; 1570 struct vnode **vpp; 1571 struct componentname *cnp; 1572 struct vattr *vap; 1573 { 1574 struct nfsv2_sattr *sp; 1575 u_int32_t *tl; 1576 caddr_t cp; 1577 int32_t t1, t2; 1578 struct vnode *newvp = (struct vnode *)0; 1579 struct nfsnode *dnp, *np; 1580 char *cp2; 1581 caddr_t bpos, dpos; 1582 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1583 struct mbuf *mreq, *mrep, *md, *mb; 1584 u_int32_t rdev; 1585 const int v3 = NFS_ISV3(dvp); 1586 1587 if (vap->va_type == VCHR || vap->va_type == VBLK) 1588 rdev = txdr_unsigned(vap->va_rdev); 1589 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1590 rdev = nfs_xdrneg1; 1591 else { 1592 VOP_ABORTOP(dvp, cnp); 1593 vput(dvp); 1594 return (EOPNOTSUPP); 1595 } 1596 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1597 dnp = VTONFS(dvp); 1598 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1599 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1600 nfsm_fhtom(dnp, v3); 1601 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1602 #ifndef NFS_V2_ONLY 1603 if (v3) { 1604 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1605 *tl++ = vtonfsv3_type(vap->va_type); 1606 nfsm_v3attrbuild(vap, FALSE); 1607 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1608 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1609 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1610 *tl = txdr_unsigned(minor(vap->va_rdev)); 1611 } 1612 } else 1613 #endif 1614 { 1615 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1616 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1617 sp->sa_uid = nfs_xdrneg1; 1618 sp->sa_gid = nfs_xdrneg1; 1619 sp->sa_size = rdev; 1620 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1621 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1622 } 1623 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_lwp, cnp->cn_cred); 1624 if (!error) { 1625 nfsm_mtofh(dvp, newvp, v3, gotvp); 1626 if (!gotvp) { 1627 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1628 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1629 if (!error) 1630 newvp = NFSTOV(np); 1631 } 1632 } 1633 #ifndef NFS_V2_ONLY 1634 if (v3) 1635 nfsm_wcc_data(dvp, wccflag, 0, !error); 1636 #endif 1637 nfsm_reqdone; 1638 if (error) { 1639 if (newvp) 1640 vput(newvp); 1641 } else { 1642 if (cnp->cn_flags & MAKEENTRY) 1643 nfs_cache_enter(dvp, newvp, cnp); 1644 *vpp = newvp; 1645 } 1646 PNBUF_PUT(cnp->cn_pnbuf); 1647 VTONFS(dvp)->n_flag |= NMODIFIED; 1648 if (!wccflag) 1649 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1650 vput(dvp); 1651 return (error); 1652 } 1653 1654 /* 1655 * nfs mknod vop 1656 * just call nfs_mknodrpc() to do the work. 1657 */ 1658 /* ARGSUSED */ 1659 int 1660 nfs_mknod(v) 1661 void *v; 1662 { 1663 struct vop_mknod_args /* { 1664 struct vnode *a_dvp; 1665 struct vnode **a_vpp; 1666 struct componentname *a_cnp; 1667 struct vattr *a_vap; 1668 } */ *ap = v; 1669 struct vnode *dvp = ap->a_dvp; 1670 struct componentname *cnp = ap->a_cnp; 1671 int error; 1672 1673 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1674 VN_KNOTE(dvp, NOTE_WRITE); 1675 if (error == 0 || error == EEXIST) 1676 cache_purge1(dvp, cnp, 0); 1677 return (error); 1678 } 1679 1680 #ifndef NFS_V2_ONLY 1681 static u_long create_verf; 1682 #endif 1683 /* 1684 * nfs file create call 1685 */ 1686 int 1687 nfs_create(v) 1688 void *v; 1689 { 1690 struct vop_create_args /* { 1691 struct vnode *a_dvp; 1692 struct vnode **a_vpp; 1693 struct componentname *a_cnp; 1694 struct vattr *a_vap; 1695 } */ *ap = v; 1696 struct vnode *dvp = ap->a_dvp; 1697 struct vattr *vap = ap->a_vap; 1698 struct componentname *cnp = ap->a_cnp; 1699 struct nfsv2_sattr *sp; 1700 u_int32_t *tl; 1701 caddr_t cp; 1702 int32_t t1, t2; 1703 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1704 struct vnode *newvp = (struct vnode *)0; 1705 caddr_t bpos, dpos, cp2; 1706 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1707 struct mbuf *mreq, *mrep, *md, *mb; 1708 const int v3 = NFS_ISV3(dvp); 1709 1710 /* 1711 * Oops, not for me.. 1712 */ 1713 if (vap->va_type == VSOCK) 1714 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1715 1716 KASSERT(vap->va_type == VREG); 1717 1718 #ifdef VA_EXCLUSIVE 1719 if (vap->va_vaflags & VA_EXCLUSIVE) 1720 fmode |= O_EXCL; 1721 #endif 1722 again: 1723 error = 0; 1724 nfsstats.rpccnt[NFSPROC_CREATE]++; 1725 dnp = VTONFS(dvp); 1726 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1727 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1728 nfsm_fhtom(dnp, v3); 1729 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1730 #ifndef NFS_V2_ONLY 1731 if (v3) { 1732 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1733 if (fmode & O_EXCL) { 1734 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1735 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1736 #ifdef INET 1737 if (TAILQ_FIRST(&in_ifaddrhead)) 1738 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1739 ia_addr.sin_addr.s_addr; 1740 else 1741 *tl++ = create_verf; 1742 #else 1743 *tl++ = create_verf; 1744 #endif 1745 *tl = ++create_verf; 1746 } else { 1747 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1748 nfsm_v3attrbuild(vap, FALSE); 1749 } 1750 } else 1751 #endif 1752 { 1753 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1754 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1755 sp->sa_uid = nfs_xdrneg1; 1756 sp->sa_gid = nfs_xdrneg1; 1757 sp->sa_size = 0; 1758 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1759 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1760 } 1761 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_lwp, cnp->cn_cred); 1762 if (!error) { 1763 nfsm_mtofh(dvp, newvp, v3, gotvp); 1764 if (!gotvp) { 1765 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1766 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1767 if (!error) 1768 newvp = NFSTOV(np); 1769 } 1770 } 1771 #ifndef NFS_V2_ONLY 1772 if (v3) 1773 nfsm_wcc_data(dvp, wccflag, 0, !error); 1774 #endif 1775 nfsm_reqdone; 1776 if (error) { 1777 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1778 fmode &= ~O_EXCL; 1779 goto again; 1780 } 1781 } else if (v3 && (fmode & O_EXCL)) { 1782 struct timespec ts; 1783 1784 getnanotime(&ts); 1785 1786 /* 1787 * make sure that we'll update timestamps as 1788 * most server implementations use them to store 1789 * the create verifier. 1790 * 1791 * XXX it's better to use TOSERVER always. 1792 */ 1793 1794 if (vap->va_atime.tv_sec == VNOVAL) 1795 vap->va_atime = ts; 1796 if (vap->va_mtime.tv_sec == VNOVAL) 1797 vap->va_mtime = ts; 1798 1799 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_lwp); 1800 } 1801 if (error == 0) { 1802 if (cnp->cn_flags & MAKEENTRY) 1803 nfs_cache_enter(dvp, newvp, cnp); 1804 else 1805 cache_purge1(dvp, cnp, 0); 1806 *ap->a_vpp = newvp; 1807 } else { 1808 if (newvp) 1809 vput(newvp); 1810 if (error == EEXIST) 1811 cache_purge1(dvp, cnp, 0); 1812 } 1813 PNBUF_PUT(cnp->cn_pnbuf); 1814 VTONFS(dvp)->n_flag |= NMODIFIED; 1815 if (!wccflag) 1816 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1817 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1818 vput(dvp); 1819 return (error); 1820 } 1821 1822 /* 1823 * nfs file remove call 1824 * To try and make nfs semantics closer to ufs semantics, a file that has 1825 * other processes using the vnode is renamed instead of removed and then 1826 * removed later on the last close. 1827 * - If v_usecount > 1 1828 * If a rename is not already in the works 1829 * call nfs_sillyrename() to set it up 1830 * else 1831 * do the remove rpc 1832 */ 1833 int 1834 nfs_remove(v) 1835 void *v; 1836 { 1837 struct vop_remove_args /* { 1838 struct vnodeop_desc *a_desc; 1839 struct vnode * a_dvp; 1840 struct vnode * a_vp; 1841 struct componentname * a_cnp; 1842 } */ *ap = v; 1843 struct vnode *vp = ap->a_vp; 1844 struct vnode *dvp = ap->a_dvp; 1845 struct componentname *cnp = ap->a_cnp; 1846 struct nfsnode *np = VTONFS(vp); 1847 int error = 0; 1848 struct vattr vattr; 1849 1850 #ifndef DIAGNOSTIC 1851 if ((cnp->cn_flags & HASBUF) == 0) 1852 panic("nfs_remove: no name"); 1853 if (vp->v_usecount < 1) 1854 panic("nfs_remove: bad v_usecount"); 1855 #endif 1856 if (vp->v_type == VDIR) 1857 error = EPERM; 1858 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1859 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_lwp) == 0 && 1860 vattr.va_nlink > 1)) { 1861 /* 1862 * Purge the name cache so that the chance of a lookup for 1863 * the name succeeding while the remove is in progress is 1864 * minimized. Without node locking it can still happen, such 1865 * that an I/O op returns ESTALE, but since you get this if 1866 * another host removes the file.. 1867 */ 1868 cache_purge(vp); 1869 /* 1870 * throw away biocache buffers, mainly to avoid 1871 * unnecessary delayed writes later. 1872 */ 1873 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_lwp, 1); 1874 /* Do the rpc */ 1875 if (error != EINTR) 1876 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1877 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp); 1878 } else if (!np->n_sillyrename) 1879 error = nfs_sillyrename(dvp, vp, cnp); 1880 PNBUF_PUT(cnp->cn_pnbuf); 1881 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1882 vattr.va_nlink == 1) { 1883 np->n_flag |= NREMOVED; 1884 } 1885 NFS_INVALIDATE_ATTRCACHE(np); 1886 VN_KNOTE(vp, NOTE_DELETE); 1887 VN_KNOTE(dvp, NOTE_WRITE); 1888 if (dvp == vp) 1889 vrele(vp); 1890 else 1891 vput(vp); 1892 vput(dvp); 1893 return (error); 1894 } 1895 1896 /* 1897 * nfs file remove rpc called from nfs_inactive 1898 */ 1899 int 1900 nfs_removeit(sp) 1901 struct sillyrename *sp; 1902 { 1903 1904 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1905 (struct lwp *)0)); 1906 } 1907 1908 /* 1909 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1910 */ 1911 int 1912 nfs_removerpc(dvp, name, namelen, cred, l) 1913 struct vnode *dvp; 1914 const char *name; 1915 int namelen; 1916 struct ucred *cred; 1917 struct lwp *l; 1918 { 1919 u_int32_t *tl; 1920 caddr_t cp; 1921 #ifndef NFS_V2_ONLY 1922 int32_t t1; 1923 caddr_t cp2; 1924 #endif 1925 int32_t t2; 1926 caddr_t bpos, dpos; 1927 int error = 0, wccflag = NFSV3_WCCRATTR; 1928 struct mbuf *mreq, *mrep, *md, *mb; 1929 const int v3 = NFS_ISV3(dvp); 1930 int rexmit = 0; 1931 struct nfsnode *dnp = VTONFS(dvp); 1932 1933 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1934 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1935 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1936 nfsm_fhtom(dnp, v3); 1937 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1938 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1939 #ifndef NFS_V2_ONLY 1940 if (v3) 1941 nfsm_wcc_data(dvp, wccflag, 0, !error); 1942 #endif 1943 nfsm_reqdone; 1944 VTONFS(dvp)->n_flag |= NMODIFIED; 1945 if (!wccflag) 1946 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1947 /* 1948 * Kludge City: If the first reply to the remove rpc is lost.. 1949 * the reply to the retransmitted request will be ENOENT 1950 * since the file was in fact removed 1951 * Therefore, we cheat and return success. 1952 */ 1953 if (rexmit && error == ENOENT) 1954 error = 0; 1955 return (error); 1956 } 1957 1958 /* 1959 * nfs file rename call 1960 */ 1961 int 1962 nfs_rename(v) 1963 void *v; 1964 { 1965 struct vop_rename_args /* { 1966 struct vnode *a_fdvp; 1967 struct vnode *a_fvp; 1968 struct componentname *a_fcnp; 1969 struct vnode *a_tdvp; 1970 struct vnode *a_tvp; 1971 struct componentname *a_tcnp; 1972 } */ *ap = v; 1973 struct vnode *fvp = ap->a_fvp; 1974 struct vnode *tvp = ap->a_tvp; 1975 struct vnode *fdvp = ap->a_fdvp; 1976 struct vnode *tdvp = ap->a_tdvp; 1977 struct componentname *tcnp = ap->a_tcnp; 1978 struct componentname *fcnp = ap->a_fcnp; 1979 int error; 1980 1981 #ifndef DIAGNOSTIC 1982 if ((tcnp->cn_flags & HASBUF) == 0 || 1983 (fcnp->cn_flags & HASBUF) == 0) 1984 panic("nfs_rename: no name"); 1985 #endif 1986 /* Check for cross-device rename */ 1987 if ((fvp->v_mount != tdvp->v_mount) || 1988 (tvp && (fvp->v_mount != tvp->v_mount))) { 1989 error = EXDEV; 1990 goto out; 1991 } 1992 1993 /* 1994 * If the tvp exists and is in use, sillyrename it before doing the 1995 * rename of the new file over it. 1996 */ 1997 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1998 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1999 VN_KNOTE(tvp, NOTE_DELETE); 2000 vput(tvp); 2001 tvp = NULL; 2002 } 2003 2004 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2005 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2006 tcnp->cn_lwp); 2007 2008 VN_KNOTE(fdvp, NOTE_WRITE); 2009 VN_KNOTE(tdvp, NOTE_WRITE); 2010 if (error == 0 || error == EEXIST) { 2011 if (fvp->v_type == VDIR) 2012 cache_purge(fvp); 2013 else 2014 cache_purge1(fdvp, fcnp, 0); 2015 if (tvp != NULL && tvp->v_type == VDIR) 2016 cache_purge(tvp); 2017 else 2018 cache_purge1(tdvp, tcnp, 0); 2019 } 2020 out: 2021 if (tdvp == tvp) 2022 vrele(tdvp); 2023 else 2024 vput(tdvp); 2025 if (tvp) 2026 vput(tvp); 2027 vrele(fdvp); 2028 vrele(fvp); 2029 return (error); 2030 } 2031 2032 /* 2033 * nfs file rename rpc called from nfs_remove() above 2034 */ 2035 int 2036 nfs_renameit(sdvp, scnp, sp) 2037 struct vnode *sdvp; 2038 struct componentname *scnp; 2039 struct sillyrename *sp; 2040 { 2041 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2042 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_lwp)); 2043 } 2044 2045 /* 2046 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2047 */ 2048 int 2049 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2050 struct vnode *fdvp; 2051 const char *fnameptr; 2052 int fnamelen; 2053 struct vnode *tdvp; 2054 const char *tnameptr; 2055 int tnamelen; 2056 struct ucred *cred; 2057 struct lwp *l; 2058 { 2059 u_int32_t *tl; 2060 caddr_t cp; 2061 #ifndef NFS_V2_ONLY 2062 int32_t t1; 2063 caddr_t cp2; 2064 #endif 2065 int32_t t2; 2066 caddr_t bpos, dpos; 2067 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2068 struct mbuf *mreq, *mrep, *md, *mb; 2069 const int v3 = NFS_ISV3(fdvp); 2070 int rexmit = 0; 2071 struct nfsnode *fdnp = VTONFS(fdvp); 2072 2073 nfsstats.rpccnt[NFSPROC_RENAME]++; 2074 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2075 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2076 nfsm_rndup(tnamelen)); 2077 nfsm_fhtom(fdnp, v3); 2078 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2079 nfsm_fhtom(VTONFS(tdvp), v3); 2080 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2081 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2082 #ifndef NFS_V2_ONLY 2083 if (v3) { 2084 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2085 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2086 } 2087 #endif 2088 nfsm_reqdone; 2089 VTONFS(fdvp)->n_flag |= NMODIFIED; 2090 VTONFS(tdvp)->n_flag |= NMODIFIED; 2091 if (!fwccflag) 2092 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2093 if (!twccflag) 2094 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2095 /* 2096 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2097 */ 2098 if (rexmit && error == ENOENT) 2099 error = 0; 2100 return (error); 2101 } 2102 2103 /* 2104 * nfs hard link create call 2105 */ 2106 int 2107 nfs_link(v) 2108 void *v; 2109 { 2110 struct vop_link_args /* { 2111 struct vnode *a_dvp; 2112 struct vnode *a_vp; 2113 struct componentname *a_cnp; 2114 } */ *ap = v; 2115 struct vnode *vp = ap->a_vp; 2116 struct vnode *dvp = ap->a_dvp; 2117 struct componentname *cnp = ap->a_cnp; 2118 u_int32_t *tl; 2119 caddr_t cp; 2120 #ifndef NFS_V2_ONLY 2121 int32_t t1; 2122 caddr_t cp2; 2123 #endif 2124 int32_t t2; 2125 caddr_t bpos, dpos; 2126 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2127 struct mbuf *mreq, *mrep, *md, *mb; 2128 /* XXX Should be const and initialised? */ 2129 int v3; 2130 int rexmit = 0; 2131 struct nfsnode *np; 2132 2133 if (dvp->v_mount != vp->v_mount) { 2134 VOP_ABORTOP(dvp, cnp); 2135 vput(dvp); 2136 return (EXDEV); 2137 } 2138 if (dvp != vp) { 2139 error = vn_lock(vp, LK_EXCLUSIVE); 2140 if (error != 0) { 2141 VOP_ABORTOP(dvp, cnp); 2142 vput(dvp); 2143 return error; 2144 } 2145 } 2146 2147 /* 2148 * Push all writes to the server, so that the attribute cache 2149 * doesn't get "out of sync" with the server. 2150 * XXX There should be a better way! 2151 */ 2152 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_lwp); 2153 2154 v3 = NFS_ISV3(vp); 2155 nfsstats.rpccnt[NFSPROC_LINK]++; 2156 np = VTONFS(vp); 2157 nfsm_reqhead(np, NFSPROC_LINK, 2158 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2159 nfsm_fhtom(np, v3); 2160 nfsm_fhtom(VTONFS(dvp), v3); 2161 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2162 nfsm_request1(np, NFSPROC_LINK, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2163 #ifndef NFS_V2_ONLY 2164 if (v3) { 2165 nfsm_postop_attr(vp, attrflag, 0); 2166 nfsm_wcc_data(dvp, wccflag, 0, !error); 2167 } 2168 #endif 2169 nfsm_reqdone; 2170 if (error == 0 || error == EEXIST) 2171 cache_purge1(dvp, cnp, 0); 2172 PNBUF_PUT(cnp->cn_pnbuf); 2173 VTONFS(dvp)->n_flag |= NMODIFIED; 2174 if (!attrflag) 2175 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2176 if (!wccflag) 2177 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2178 if (dvp != vp) 2179 VOP_UNLOCK(vp, 0); 2180 VN_KNOTE(vp, NOTE_LINK); 2181 VN_KNOTE(dvp, NOTE_WRITE); 2182 vput(dvp); 2183 /* 2184 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2185 */ 2186 if (rexmit && error == EEXIST) 2187 error = 0; 2188 return (error); 2189 } 2190 2191 /* 2192 * nfs symbolic link create call 2193 */ 2194 int 2195 nfs_symlink(v) 2196 void *v; 2197 { 2198 struct vop_symlink_args /* { 2199 struct vnode *a_dvp; 2200 struct vnode **a_vpp; 2201 struct componentname *a_cnp; 2202 struct vattr *a_vap; 2203 char *a_target; 2204 } */ *ap = v; 2205 struct vnode *dvp = ap->a_dvp; 2206 struct vattr *vap = ap->a_vap; 2207 struct componentname *cnp = ap->a_cnp; 2208 struct nfsv2_sattr *sp; 2209 u_int32_t *tl; 2210 caddr_t cp; 2211 int32_t t1, t2; 2212 caddr_t bpos, dpos, cp2; 2213 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2214 struct mbuf *mreq, *mrep, *md, *mb; 2215 struct vnode *newvp = (struct vnode *)0; 2216 const int v3 = NFS_ISV3(dvp); 2217 int rexmit = 0; 2218 struct nfsnode *dnp = VTONFS(dvp); 2219 2220 *ap->a_vpp = NULL; 2221 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2222 slen = strlen(ap->a_target); 2223 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2224 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2225 nfsm_fhtom(dnp, v3); 2226 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2227 #ifndef NFS_V2_ONlY 2228 if (v3) 2229 nfsm_v3attrbuild(vap, FALSE); 2230 #endif 2231 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2232 #ifndef NFS_V2_ONlY 2233 if (!v3) { 2234 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2235 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2236 sp->sa_uid = nfs_xdrneg1; 2237 sp->sa_gid = nfs_xdrneg1; 2238 sp->sa_size = nfs_xdrneg1; 2239 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2240 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2241 } 2242 #endif 2243 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_lwp, cnp->cn_cred, 2244 &rexmit); 2245 #ifndef NFS_V2_ONlY 2246 if (v3) { 2247 if (!error) 2248 nfsm_mtofh(dvp, newvp, v3, gotvp); 2249 nfsm_wcc_data(dvp, wccflag, 0, !error); 2250 } 2251 #endif 2252 nfsm_reqdone; 2253 /* 2254 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2255 */ 2256 if (rexmit && error == EEXIST) 2257 error = 0; 2258 if (error == 0 || error == EEXIST) 2259 cache_purge1(dvp, cnp, 0); 2260 if (error == 0 && newvp == NULL) { 2261 struct nfsnode *np = NULL; 2262 2263 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2264 cnp->cn_cred, cnp->cn_lwp, &np); 2265 if (error == 0) 2266 newvp = NFSTOV(np); 2267 } 2268 if (error) { 2269 if (newvp != NULL) 2270 vput(newvp); 2271 } else { 2272 *ap->a_vpp = newvp; 2273 } 2274 PNBUF_PUT(cnp->cn_pnbuf); 2275 VTONFS(dvp)->n_flag |= NMODIFIED; 2276 if (!wccflag) 2277 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2278 VN_KNOTE(dvp, NOTE_WRITE); 2279 vput(dvp); 2280 return (error); 2281 } 2282 2283 /* 2284 * nfs make dir call 2285 */ 2286 int 2287 nfs_mkdir(v) 2288 void *v; 2289 { 2290 struct vop_mkdir_args /* { 2291 struct vnode *a_dvp; 2292 struct vnode **a_vpp; 2293 struct componentname *a_cnp; 2294 struct vattr *a_vap; 2295 } */ *ap = v; 2296 struct vnode *dvp = ap->a_dvp; 2297 struct vattr *vap = ap->a_vap; 2298 struct componentname *cnp = ap->a_cnp; 2299 struct nfsv2_sattr *sp; 2300 u_int32_t *tl; 2301 caddr_t cp; 2302 int32_t t1, t2; 2303 int len; 2304 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2305 struct vnode *newvp = (struct vnode *)0; 2306 caddr_t bpos, dpos, cp2; 2307 int error = 0, wccflag = NFSV3_WCCRATTR; 2308 int gotvp = 0; 2309 int rexmit = 0; 2310 struct mbuf *mreq, *mrep, *md, *mb; 2311 const int v3 = NFS_ISV3(dvp); 2312 2313 len = cnp->cn_namelen; 2314 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2315 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2316 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2317 nfsm_fhtom(dnp, v3); 2318 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2319 #ifndef NFS_V2_ONLY 2320 if (v3) { 2321 nfsm_v3attrbuild(vap, FALSE); 2322 } else 2323 #endif 2324 { 2325 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2326 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2327 sp->sa_uid = nfs_xdrneg1; 2328 sp->sa_gid = nfs_xdrneg1; 2329 sp->sa_size = nfs_xdrneg1; 2330 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2331 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2332 } 2333 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2334 if (!error) 2335 nfsm_mtofh(dvp, newvp, v3, gotvp); 2336 if (v3) 2337 nfsm_wcc_data(dvp, wccflag, 0, !error); 2338 nfsm_reqdone; 2339 VTONFS(dvp)->n_flag |= NMODIFIED; 2340 if (!wccflag) 2341 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2342 /* 2343 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2344 * if we can succeed in looking up the directory. 2345 */ 2346 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2347 if (newvp) { 2348 vput(newvp); 2349 newvp = (struct vnode *)0; 2350 } 2351 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2352 cnp->cn_lwp, &np); 2353 if (!error) { 2354 newvp = NFSTOV(np); 2355 if (newvp->v_type != VDIR || newvp == dvp) 2356 error = EEXIST; 2357 } 2358 } 2359 if (error) { 2360 if (newvp) { 2361 if (dvp != newvp) 2362 vput(newvp); 2363 else 2364 vrele(newvp); 2365 } 2366 } else { 2367 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2368 if (cnp->cn_flags & MAKEENTRY) 2369 nfs_cache_enter(dvp, newvp, cnp); 2370 *ap->a_vpp = newvp; 2371 } 2372 PNBUF_PUT(cnp->cn_pnbuf); 2373 vput(dvp); 2374 return (error); 2375 } 2376 2377 /* 2378 * nfs remove directory call 2379 */ 2380 int 2381 nfs_rmdir(v) 2382 void *v; 2383 { 2384 struct vop_rmdir_args /* { 2385 struct vnode *a_dvp; 2386 struct vnode *a_vp; 2387 struct componentname *a_cnp; 2388 } */ *ap = v; 2389 struct vnode *vp = ap->a_vp; 2390 struct vnode *dvp = ap->a_dvp; 2391 struct componentname *cnp = ap->a_cnp; 2392 u_int32_t *tl; 2393 caddr_t cp; 2394 #ifndef NFS_V2_ONLY 2395 int32_t t1; 2396 caddr_t cp2; 2397 #endif 2398 int32_t t2; 2399 caddr_t bpos, dpos; 2400 int error = 0, wccflag = NFSV3_WCCRATTR; 2401 int rexmit = 0; 2402 struct mbuf *mreq, *mrep, *md, *mb; 2403 const int v3 = NFS_ISV3(dvp); 2404 struct nfsnode *dnp; 2405 2406 if (dvp == vp) { 2407 vrele(dvp); 2408 vput(dvp); 2409 PNBUF_PUT(cnp->cn_pnbuf); 2410 return (EINVAL); 2411 } 2412 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2413 dnp = VTONFS(dvp); 2414 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2415 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2416 nfsm_fhtom(dnp, v3); 2417 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2418 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2419 #ifndef NFS_V2_ONLY 2420 if (v3) 2421 nfsm_wcc_data(dvp, wccflag, 0, !error); 2422 #endif 2423 nfsm_reqdone; 2424 PNBUF_PUT(cnp->cn_pnbuf); 2425 VTONFS(dvp)->n_flag |= NMODIFIED; 2426 if (!wccflag) 2427 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2428 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2429 VN_KNOTE(vp, NOTE_DELETE); 2430 cache_purge(vp); 2431 vput(vp); 2432 vput(dvp); 2433 /* 2434 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2435 */ 2436 if (rexmit && error == ENOENT) 2437 error = 0; 2438 return (error); 2439 } 2440 2441 /* 2442 * nfs readdir call 2443 */ 2444 int 2445 nfs_readdir(v) 2446 void *v; 2447 { 2448 struct vop_readdir_args /* { 2449 struct vnode *a_vp; 2450 struct uio *a_uio; 2451 struct ucred *a_cred; 2452 int *a_eofflag; 2453 off_t **a_cookies; 2454 int *a_ncookies; 2455 } */ *ap = v; 2456 struct vnode *vp = ap->a_vp; 2457 struct uio *uio = ap->a_uio; 2458 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2459 char *base = uio->uio_iov->iov_base; 2460 int tresid, error; 2461 size_t count, lost; 2462 struct dirent *dp; 2463 off_t *cookies = NULL; 2464 int ncookies = 0, nc; 2465 2466 if (vp->v_type != VDIR) 2467 return (EPERM); 2468 2469 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2470 count = uio->uio_resid - lost; 2471 if (count <= 0) 2472 return (EINVAL); 2473 2474 /* 2475 * Call nfs_bioread() to do the real work. 2476 */ 2477 tresid = uio->uio_resid = count; 2478 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2479 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2480 2481 if (!error && ap->a_cookies) { 2482 ncookies = count / 16; 2483 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2484 *ap->a_cookies = cookies; 2485 } 2486 2487 if (!error && uio->uio_resid == tresid) { 2488 uio->uio_resid += lost; 2489 nfsstats.direofcache_misses++; 2490 if (ap->a_cookies) 2491 *ap->a_ncookies = 0; 2492 *ap->a_eofflag = 1; 2493 return (0); 2494 } 2495 2496 if (!error && ap->a_cookies) { 2497 /* 2498 * Only the NFS server and emulations use cookies, and they 2499 * load the directory block into system space, so we can 2500 * just look at it directly. 2501 */ 2502 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2503 uio->uio_iovcnt != 1) 2504 panic("nfs_readdir: lost in space"); 2505 for (nc = 0; ncookies-- && 2506 base < (char *)uio->uio_iov->iov_base; nc++){ 2507 dp = (struct dirent *) base; 2508 if (dp->d_reclen == 0) 2509 break; 2510 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2511 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2512 else 2513 *(cookies++) = NFS_GETCOOKIE(dp); 2514 base += dp->d_reclen; 2515 } 2516 uio->uio_resid += 2517 ((caddr_t)uio->uio_iov->iov_base - base); 2518 uio->uio_iov->iov_len += 2519 ((caddr_t)uio->uio_iov->iov_base - base); 2520 uio->uio_iov->iov_base = base; 2521 *ap->a_ncookies = nc; 2522 } 2523 2524 uio->uio_resid += lost; 2525 *ap->a_eofflag = 0; 2526 return (error); 2527 } 2528 2529 /* 2530 * Readdir rpc call. 2531 * Called from below the buffer cache by nfs_doio(). 2532 */ 2533 int 2534 nfs_readdirrpc(vp, uiop, cred) 2535 struct vnode *vp; 2536 struct uio *uiop; 2537 struct ucred *cred; 2538 { 2539 int len, left; 2540 struct dirent *dp = NULL; 2541 u_int32_t *tl; 2542 caddr_t cp; 2543 int32_t t1, t2; 2544 caddr_t bpos, dpos, cp2; 2545 struct mbuf *mreq, *mrep, *md, *mb; 2546 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2547 struct nfsnode *dnp = VTONFS(vp); 2548 u_quad_t fileno; 2549 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2550 #ifndef NFS_V2_ONLY 2551 int attrflag; 2552 #endif 2553 int nrpcs = 0, reclen; 2554 const int v3 = NFS_ISV3(vp); 2555 2556 #ifdef DIAGNOSTIC 2557 /* 2558 * Should be called from buffer cache, so only amount of 2559 * NFS_DIRBLKSIZ will be requested. 2560 */ 2561 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2562 panic("nfs readdirrpc bad uio"); 2563 #endif 2564 2565 /* 2566 * Loop around doing readdir rpc's of size nm_readdirsize 2567 * truncated to a multiple of NFS_DIRFRAGSIZ. 2568 * The stopping criteria is EOF or buffer full. 2569 */ 2570 while (more_dirs && bigenough) { 2571 /* 2572 * Heuristic: don't bother to do another RPC to further 2573 * fill up this block if there is not much room left. (< 50% 2574 * of the readdir RPC size). This wastes some buffer space 2575 * but can save up to 50% in RPC calls. 2576 */ 2577 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2578 bigenough = 0; 2579 break; 2580 } 2581 nfsstats.rpccnt[NFSPROC_READDIR]++; 2582 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2583 NFSX_READDIR(v3)); 2584 nfsm_fhtom(dnp, v3); 2585 #ifndef NFS_V2_ONLY 2586 if (v3) { 2587 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2588 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2589 txdr_swapcookie3(uiop->uio_offset, tl); 2590 } else { 2591 txdr_cookie3(uiop->uio_offset, tl); 2592 } 2593 tl += 2; 2594 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2595 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2596 } else 2597 #endif 2598 { 2599 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2600 *tl++ = txdr_unsigned(uiop->uio_offset); 2601 } 2602 *tl = txdr_unsigned(nmp->nm_readdirsize); 2603 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2604 nrpcs++; 2605 #ifndef NFS_V2_ONLY 2606 if (v3) { 2607 nfsm_postop_attr(vp, attrflag, 0); 2608 if (!error) { 2609 nfsm_dissect(tl, u_int32_t *, 2610 2 * NFSX_UNSIGNED); 2611 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2612 dnp->n_cookieverf.nfsuquad[1] = *tl; 2613 } else { 2614 m_freem(mrep); 2615 goto nfsmout; 2616 } 2617 } 2618 #endif 2619 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2620 more_dirs = fxdr_unsigned(int, *tl); 2621 2622 /* loop thru the dir entries, doctoring them to 4bsd form */ 2623 while (more_dirs && bigenough) { 2624 #ifndef NFS_V2_ONLY 2625 if (v3) { 2626 nfsm_dissect(tl, u_int32_t *, 2627 3 * NFSX_UNSIGNED); 2628 fileno = fxdr_hyper(tl); 2629 len = fxdr_unsigned(int, *(tl + 2)); 2630 } else 2631 #endif 2632 { 2633 nfsm_dissect(tl, u_int32_t *, 2634 2 * NFSX_UNSIGNED); 2635 fileno = fxdr_unsigned(u_quad_t, *tl++); 2636 len = fxdr_unsigned(int, *tl); 2637 } 2638 if (len <= 0 || len > NFS_MAXNAMLEN) { 2639 error = EBADRPC; 2640 m_freem(mrep); 2641 goto nfsmout; 2642 } 2643 /* for cookie stashing */ 2644 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2645 left = NFS_DIRFRAGSIZ - blksiz; 2646 if (reclen > left) { 2647 memset(uiop->uio_iov->iov_base, 0, left); 2648 dp->d_reclen += left; 2649 UIO_ADVANCE(uiop, left); 2650 blksiz = 0; 2651 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2652 } 2653 if (reclen > uiop->uio_resid) 2654 bigenough = 0; 2655 if (bigenough) { 2656 int tlen; 2657 2658 dp = (struct dirent *)uiop->uio_iov->iov_base; 2659 dp->d_fileno = fileno; 2660 dp->d_namlen = len; 2661 dp->d_reclen = reclen; 2662 dp->d_type = DT_UNKNOWN; 2663 blksiz += reclen; 2664 if (blksiz == NFS_DIRFRAGSIZ) 2665 blksiz = 0; 2666 UIO_ADVANCE(uiop, DIRHDSIZ); 2667 nfsm_mtouio(uiop, len); 2668 tlen = reclen - (DIRHDSIZ + len); 2669 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2670 UIO_ADVANCE(uiop, tlen); 2671 } else 2672 nfsm_adv(nfsm_rndup(len)); 2673 #ifndef NFS_V2_ONLY 2674 if (v3) { 2675 nfsm_dissect(tl, u_int32_t *, 2676 3 * NFSX_UNSIGNED); 2677 } else 2678 #endif 2679 { 2680 nfsm_dissect(tl, u_int32_t *, 2681 2 * NFSX_UNSIGNED); 2682 } 2683 if (bigenough) { 2684 #ifndef NFS_V2_ONLY 2685 if (v3) { 2686 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2687 uiop->uio_offset = 2688 fxdr_swapcookie3(tl); 2689 else 2690 uiop->uio_offset = 2691 fxdr_cookie3(tl); 2692 } 2693 else 2694 #endif 2695 { 2696 uiop->uio_offset = 2697 fxdr_unsigned(off_t, *tl); 2698 } 2699 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2700 } 2701 if (v3) 2702 tl += 2; 2703 else 2704 tl++; 2705 more_dirs = fxdr_unsigned(int, *tl); 2706 } 2707 /* 2708 * If at end of rpc data, get the eof boolean 2709 */ 2710 if (!more_dirs) { 2711 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2712 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2713 2714 /* 2715 * kludge: if we got no entries, treat it as EOF. 2716 * some server sometimes send a reply without any 2717 * entries or EOF. 2718 * although it might mean the server has very long name, 2719 * we can't handle such entries anyway. 2720 */ 2721 2722 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2723 more_dirs = 0; 2724 } 2725 m_freem(mrep); 2726 } 2727 /* 2728 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2729 * by increasing d_reclen for the last record. 2730 */ 2731 if (blksiz > 0) { 2732 left = NFS_DIRFRAGSIZ - blksiz; 2733 memset(uiop->uio_iov->iov_base, 0, left); 2734 dp->d_reclen += left; 2735 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2736 UIO_ADVANCE(uiop, left); 2737 } 2738 2739 /* 2740 * We are now either at the end of the directory or have filled the 2741 * block. 2742 */ 2743 if (bigenough) { 2744 dnp->n_direofoffset = uiop->uio_offset; 2745 dnp->n_flag |= NEOFVALID; 2746 } 2747 nfsmout: 2748 return (error); 2749 } 2750 2751 #ifndef NFS_V2_ONLY 2752 /* 2753 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2754 */ 2755 int 2756 nfs_readdirplusrpc(vp, uiop, cred) 2757 struct vnode *vp; 2758 struct uio *uiop; 2759 struct ucred *cred; 2760 { 2761 int len, left; 2762 struct dirent *dp = NULL; 2763 u_int32_t *tl; 2764 caddr_t cp; 2765 int32_t t1, t2; 2766 struct vnode *newvp; 2767 caddr_t bpos, dpos, cp2; 2768 struct mbuf *mreq, *mrep, *md, *mb; 2769 struct nameidata nami, *ndp = &nami; 2770 struct componentname *cnp = &ndp->ni_cnd; 2771 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2772 struct nfsnode *dnp = VTONFS(vp), *np; 2773 nfsfh_t *fhp; 2774 u_quad_t fileno; 2775 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2776 int attrflag, fhsize, nrpcs = 0, reclen; 2777 struct nfs_fattr fattr, *fp; 2778 2779 #ifdef DIAGNOSTIC 2780 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2781 panic("nfs readdirplusrpc bad uio"); 2782 #endif 2783 ndp->ni_dvp = vp; 2784 newvp = NULLVP; 2785 2786 /* 2787 * Loop around doing readdir rpc's of size nm_readdirsize 2788 * truncated to a multiple of NFS_DIRFRAGSIZ. 2789 * The stopping criteria is EOF or buffer full. 2790 */ 2791 while (more_dirs && bigenough) { 2792 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2793 bigenough = 0; 2794 break; 2795 } 2796 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2797 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2798 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2799 nfsm_fhtom(dnp, 1); 2800 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2801 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2802 txdr_swapcookie3(uiop->uio_offset, tl); 2803 } else { 2804 txdr_cookie3(uiop->uio_offset, tl); 2805 } 2806 tl += 2; 2807 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2808 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2809 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2810 *tl = txdr_unsigned(nmp->nm_rsize); 2811 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2812 nfsm_postop_attr(vp, attrflag, 0); 2813 if (error) { 2814 m_freem(mrep); 2815 goto nfsmout; 2816 } 2817 nrpcs++; 2818 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2819 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2820 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2821 more_dirs = fxdr_unsigned(int, *tl); 2822 2823 /* loop thru the dir entries, doctoring them to 4bsd form */ 2824 while (more_dirs && bigenough) { 2825 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2826 fileno = fxdr_hyper(tl); 2827 len = fxdr_unsigned(int, *(tl + 2)); 2828 if (len <= 0 || len > NFS_MAXNAMLEN) { 2829 error = EBADRPC; 2830 m_freem(mrep); 2831 goto nfsmout; 2832 } 2833 /* for cookie stashing */ 2834 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2835 left = NFS_DIRFRAGSIZ - blksiz; 2836 if (reclen > left) { 2837 /* 2838 * DIRFRAGSIZ is aligned, no need to align 2839 * again here. 2840 */ 2841 memset(uiop->uio_iov->iov_base, 0, left); 2842 dp->d_reclen += left; 2843 UIO_ADVANCE(uiop, left); 2844 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2845 blksiz = 0; 2846 } 2847 if (reclen > uiop->uio_resid) 2848 bigenough = 0; 2849 if (bigenough) { 2850 int tlen; 2851 2852 dp = (struct dirent *)uiop->uio_iov->iov_base; 2853 dp->d_fileno = fileno; 2854 dp->d_namlen = len; 2855 dp->d_reclen = reclen; 2856 dp->d_type = DT_UNKNOWN; 2857 blksiz += reclen; 2858 if (blksiz == NFS_DIRFRAGSIZ) 2859 blksiz = 0; 2860 UIO_ADVANCE(uiop, DIRHDSIZ); 2861 nfsm_mtouio(uiop, len); 2862 tlen = reclen - (DIRHDSIZ + len); 2863 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2864 UIO_ADVANCE(uiop, tlen); 2865 cnp->cn_nameptr = dp->d_name; 2866 cnp->cn_namelen = dp->d_namlen; 2867 } else 2868 nfsm_adv(nfsm_rndup(len)); 2869 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2870 if (bigenough) { 2871 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2872 uiop->uio_offset = 2873 fxdr_swapcookie3(tl); 2874 else 2875 uiop->uio_offset = 2876 fxdr_cookie3(tl); 2877 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2878 } 2879 tl += 2; 2880 2881 /* 2882 * Since the attributes are before the file handle 2883 * (sigh), we must skip over the attributes and then 2884 * come back and get them. 2885 */ 2886 attrflag = fxdr_unsigned(int, *tl); 2887 if (attrflag) { 2888 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2889 memcpy(&fattr, fp, NFSX_V3FATTR); 2890 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2891 doit = fxdr_unsigned(int, *tl); 2892 if (doit) { 2893 nfsm_getfh(fhp, fhsize, 1); 2894 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2895 VREF(vp); 2896 newvp = vp; 2897 np = dnp; 2898 } else { 2899 error = nfs_nget1(vp->v_mount, fhp, 2900 fhsize, &np, LK_NOWAIT); 2901 if (!error) 2902 newvp = NFSTOV(np); 2903 } 2904 if (!error) { 2905 const char *xcp; 2906 2907 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2908 if (bigenough) { 2909 dp->d_type = 2910 IFTODT(VTTOIF(np->n_vattr->va_type)); 2911 if (cnp->cn_namelen <= NCHNAMLEN) { 2912 ndp->ni_vp = newvp; 2913 xcp = cnp->cn_nameptr + 2914 cnp->cn_namelen; 2915 cnp->cn_hash = 2916 namei_hash(cnp->cn_nameptr, &xcp); 2917 nfs_cache_enter(ndp->ni_dvp, 2918 ndp->ni_vp, cnp); 2919 } 2920 } 2921 } 2922 error = 0; 2923 } 2924 } else { 2925 /* Just skip over the file handle */ 2926 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2927 i = fxdr_unsigned(int, *tl); 2928 nfsm_adv(nfsm_rndup(i)); 2929 } 2930 if (newvp != NULLVP) { 2931 if (newvp == vp) 2932 vrele(newvp); 2933 else 2934 vput(newvp); 2935 newvp = NULLVP; 2936 } 2937 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2938 more_dirs = fxdr_unsigned(int, *tl); 2939 } 2940 /* 2941 * If at end of rpc data, get the eof boolean 2942 */ 2943 if (!more_dirs) { 2944 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2945 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2946 2947 /* 2948 * kludge: see a comment in nfs_readdirrpc. 2949 */ 2950 2951 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2952 more_dirs = 0; 2953 } 2954 m_freem(mrep); 2955 } 2956 /* 2957 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2958 * by increasing d_reclen for the last record. 2959 */ 2960 if (blksiz > 0) { 2961 left = NFS_DIRFRAGSIZ - blksiz; 2962 memset(uiop->uio_iov->iov_base, 0, left); 2963 dp->d_reclen += left; 2964 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2965 UIO_ADVANCE(uiop, left); 2966 } 2967 2968 /* 2969 * We are now either at the end of the directory or have filled the 2970 * block. 2971 */ 2972 if (bigenough) { 2973 dnp->n_direofoffset = uiop->uio_offset; 2974 dnp->n_flag |= NEOFVALID; 2975 } 2976 nfsmout: 2977 if (newvp != NULLVP) { 2978 if(newvp == vp) 2979 vrele(newvp); 2980 else 2981 vput(newvp); 2982 } 2983 return (error); 2984 } 2985 #endif 2986 2987 /* 2988 * Silly rename. To make the NFS filesystem that is stateless look a little 2989 * more like the "ufs" a remove of an active vnode is translated to a rename 2990 * to a funny looking filename that is removed by nfs_inactive on the 2991 * nfsnode. There is the potential for another process on a different client 2992 * to create the same funny name between the nfs_lookitup() fails and the 2993 * nfs_rename() completes, but... 2994 */ 2995 int 2996 nfs_sillyrename(dvp, vp, cnp) 2997 struct vnode *dvp, *vp; 2998 struct componentname *cnp; 2999 { 3000 struct sillyrename *sp; 3001 struct nfsnode *np; 3002 int error; 3003 short pid; 3004 3005 cache_purge(dvp); 3006 np = VTONFS(vp); 3007 #ifndef DIAGNOSTIC 3008 if (vp->v_type == VDIR) 3009 panic("nfs: sillyrename dir"); 3010 #endif 3011 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3012 M_NFSREQ, M_WAITOK); 3013 sp->s_cred = crdup(cnp->cn_cred); 3014 sp->s_dvp = dvp; 3015 VREF(dvp); 3016 3017 /* Fudge together a funny name */ 3018 pid = cnp->cn_lwp->l_proc->p_pid; 3019 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3020 sp->s_namlen = 12; 3021 sp->s_name[8] = hexdigits[pid & 0xf]; 3022 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3023 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3024 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3025 3026 /* Try lookitups until we get one that isn't there */ 3027 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3028 cnp->cn_lwp, (struct nfsnode **)0) == 0) { 3029 sp->s_name[4]++; 3030 if (sp->s_name[4] > 'z') { 3031 error = EINVAL; 3032 goto bad; 3033 } 3034 } 3035 error = nfs_renameit(dvp, cnp, sp); 3036 if (error) 3037 goto bad; 3038 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3039 cnp->cn_lwp, &np); 3040 np->n_sillyrename = sp; 3041 return (0); 3042 bad: 3043 vrele(sp->s_dvp); 3044 crfree(sp->s_cred); 3045 free((caddr_t)sp, M_NFSREQ); 3046 return (error); 3047 } 3048 3049 /* 3050 * Look up a file name and optionally either update the file handle or 3051 * allocate an nfsnode, depending on the value of npp. 3052 * npp == NULL --> just do the lookup 3053 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3054 * handled too 3055 * *npp != NULL --> update the file handle in the vnode 3056 */ 3057 int 3058 nfs_lookitup(dvp, name, len, cred, l, npp) 3059 struct vnode *dvp; 3060 const char *name; 3061 int len; 3062 struct ucred *cred; 3063 struct lwp *l; 3064 struct nfsnode **npp; 3065 { 3066 u_int32_t *tl; 3067 caddr_t cp; 3068 int32_t t1, t2; 3069 struct vnode *newvp = (struct vnode *)0; 3070 struct nfsnode *np, *dnp = VTONFS(dvp); 3071 caddr_t bpos, dpos, cp2; 3072 int error = 0, fhlen; 3073 #ifndef NFS_V2_ONLY 3074 int attrflag; 3075 #endif 3076 struct mbuf *mreq, *mrep, *md, *mb; 3077 nfsfh_t *nfhp; 3078 const int v3 = NFS_ISV3(dvp); 3079 3080 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3081 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3082 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3083 nfsm_fhtom(dnp, v3); 3084 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3085 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3086 if (npp && !error) { 3087 nfsm_getfh(nfhp, fhlen, v3); 3088 if (*npp) { 3089 np = *npp; 3090 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3091 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3092 np->n_fhp = &np->n_fh; 3093 } 3094 #if NFS_SMALLFH < NFSX_V3FHMAX 3095 else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3096 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3097 #endif 3098 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3099 np->n_fhsize = fhlen; 3100 newvp = NFSTOV(np); 3101 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3102 VREF(dvp); 3103 newvp = dvp; 3104 np = dnp; 3105 } else { 3106 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3107 if (error) { 3108 m_freem(mrep); 3109 return (error); 3110 } 3111 newvp = NFSTOV(np); 3112 } 3113 #ifndef NFS_V2_ONLY 3114 if (v3) { 3115 nfsm_postop_attr(newvp, attrflag, 0); 3116 if (!attrflag && *npp == NULL) { 3117 m_freem(mrep); 3118 vput(newvp); 3119 return (ENOENT); 3120 } 3121 } else 3122 #endif 3123 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3124 } 3125 nfsm_reqdone; 3126 if (npp && *npp == NULL) { 3127 if (error) { 3128 if (newvp) 3129 vput(newvp); 3130 } else 3131 *npp = np; 3132 } 3133 return (error); 3134 } 3135 3136 #ifndef NFS_V2_ONLY 3137 /* 3138 * Nfs Version 3 commit rpc 3139 */ 3140 int 3141 nfs_commit(vp, offset, cnt, l) 3142 struct vnode *vp; 3143 off_t offset; 3144 uint32_t cnt; 3145 struct lwp *l; 3146 { 3147 caddr_t cp; 3148 u_int32_t *tl; 3149 int32_t t1, t2; 3150 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3151 caddr_t bpos, dpos, cp2; 3152 int error = 0, wccflag = NFSV3_WCCRATTR; 3153 struct mbuf *mreq, *mrep, *md, *mb; 3154 struct nfsnode *np; 3155 3156 KASSERT(NFS_ISV3(vp)); 3157 3158 #ifdef NFS_DEBUG_COMMIT 3159 printf("commit %lu - %lu\n", (unsigned long)offset, 3160 (unsigned long)(offset + cnt)); 3161 #endif 3162 3163 simple_lock(&nmp->nm_slock); 3164 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3165 simple_unlock(&nmp->nm_slock); 3166 return (0); 3167 } 3168 simple_unlock(&nmp->nm_slock); 3169 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3170 np = VTONFS(vp); 3171 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3172 nfsm_fhtom(np, 1); 3173 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3174 txdr_hyper(offset, tl); 3175 tl += 2; 3176 *tl = txdr_unsigned(cnt); 3177 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3178 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3179 if (!error) { 3180 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3181 simple_lock(&nmp->nm_slock); 3182 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3183 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3184 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3185 error = NFSERR_STALEWRITEVERF; 3186 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3187 } 3188 simple_unlock(&nmp->nm_slock); 3189 } 3190 nfsm_reqdone; 3191 return (error); 3192 } 3193 #endif 3194 3195 /* 3196 * Kludge City.. 3197 * - make nfs_bmap() essentially a no-op that does no translation 3198 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3199 * (Maybe I could use the process's page mapping, but I was concerned that 3200 * Kernel Write might not be enabled and also figured copyout() would do 3201 * a lot more work than memcpy() and also it currently happens in the 3202 * context of the swapper process (2). 3203 */ 3204 int 3205 nfs_bmap(v) 3206 void *v; 3207 { 3208 struct vop_bmap_args /* { 3209 struct vnode *a_vp; 3210 daddr_t a_bn; 3211 struct vnode **a_vpp; 3212 daddr_t *a_bnp; 3213 int *a_runp; 3214 } */ *ap = v; 3215 struct vnode *vp = ap->a_vp; 3216 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3217 3218 if (ap->a_vpp != NULL) 3219 *ap->a_vpp = vp; 3220 if (ap->a_bnp != NULL) 3221 *ap->a_bnp = ap->a_bn << bshift; 3222 if (ap->a_runp != NULL) 3223 *ap->a_runp = 1024 * 1024; /* XXX */ 3224 return (0); 3225 } 3226 3227 /* 3228 * Strategy routine. 3229 * For async requests when nfsiod(s) are running, queue the request by 3230 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3231 * request. 3232 */ 3233 int 3234 nfs_strategy(v) 3235 void *v; 3236 { 3237 struct vop_strategy_args *ap = v; 3238 struct buf *bp = ap->a_bp; 3239 int error = 0; 3240 3241 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3242 panic("nfs physio/async"); 3243 3244 /* 3245 * If the op is asynchronous and an i/o daemon is waiting 3246 * queue the request, wake it up and wait for completion 3247 * otherwise just do it ourselves. 3248 */ 3249 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3250 error = nfs_doio(bp); 3251 return (error); 3252 } 3253 3254 /* 3255 * fsync vnode op. Just call nfs_flush() with commit == 1. 3256 */ 3257 /* ARGSUSED */ 3258 int 3259 nfs_fsync(v) 3260 void *v; 3261 { 3262 struct vop_fsync_args /* { 3263 struct vnodeop_desc *a_desc; 3264 struct vnode * a_vp; 3265 struct ucred * a_cred; 3266 int a_flags; 3267 off_t offlo; 3268 off_t offhi; 3269 struct lwp * a_l; 3270 } */ *ap = v; 3271 3272 struct vnode *vp = ap->a_vp; 3273 3274 if (vp->v_type != VREG) 3275 return 0; 3276 3277 return (nfs_flush(vp, ap->a_cred, 3278 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_l, 1)); 3279 } 3280 3281 /* 3282 * Flush all the data associated with a vnode. 3283 */ 3284 int 3285 nfs_flush(vp, cred, waitfor, l, commit) 3286 struct vnode *vp; 3287 struct ucred *cred; 3288 int waitfor; 3289 struct lwp *l; 3290 int commit; 3291 { 3292 struct nfsnode *np = VTONFS(vp); 3293 int error; 3294 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3295 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3296 3297 simple_lock(&vp->v_interlock); 3298 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3299 if (np->n_flag & NWRITEERR) { 3300 error = np->n_error; 3301 np->n_flag &= ~NWRITEERR; 3302 } 3303 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3304 return (error); 3305 } 3306 3307 /* 3308 * Return POSIX pathconf information applicable to nfs. 3309 * 3310 * N.B. The NFS V2 protocol doesn't support this RPC. 3311 */ 3312 /* ARGSUSED */ 3313 int 3314 nfs_pathconf(v) 3315 void *v; 3316 { 3317 struct vop_pathconf_args /* { 3318 struct vnode *a_vp; 3319 int a_name; 3320 register_t *a_retval; 3321 } */ *ap = v; 3322 struct nfsv3_pathconf *pcp; 3323 struct vnode *vp = ap->a_vp; 3324 struct mbuf *mreq, *mrep, *md, *mb; 3325 int32_t t1, t2; 3326 u_int32_t *tl; 3327 caddr_t bpos, dpos, cp, cp2; 3328 int error = 0, attrflag; 3329 #ifndef NFS_V2_ONLY 3330 struct nfsmount *nmp; 3331 unsigned int l; 3332 u_int64_t maxsize; 3333 #endif 3334 const int v3 = NFS_ISV3(vp); 3335 struct nfsnode *np = VTONFS(vp); 3336 3337 switch (ap->a_name) { 3338 /* Names that can be resolved locally. */ 3339 case _PC_PIPE_BUF: 3340 *ap->a_retval = PIPE_BUF; 3341 break; 3342 case _PC_SYNC_IO: 3343 *ap->a_retval = 1; 3344 break; 3345 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3346 case _PC_LINK_MAX: 3347 case _PC_NAME_MAX: 3348 case _PC_CHOWN_RESTRICTED: 3349 case _PC_NO_TRUNC: 3350 if (!v3) { 3351 error = EINVAL; 3352 break; 3353 } 3354 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3355 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3356 nfsm_fhtom(np, 1); 3357 nfsm_request(np, NFSPROC_PATHCONF, 3358 curlwp, curlwp->l_proc->p_ucred); /* XXX */ 3359 nfsm_postop_attr(vp, attrflag, 0); 3360 if (!error) { 3361 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3362 NFSX_V3PATHCONF); 3363 switch (ap->a_name) { 3364 case _PC_LINK_MAX: 3365 *ap->a_retval = 3366 fxdr_unsigned(register_t, pcp->pc_linkmax); 3367 break; 3368 case _PC_NAME_MAX: 3369 *ap->a_retval = 3370 fxdr_unsigned(register_t, pcp->pc_namemax); 3371 break; 3372 case _PC_CHOWN_RESTRICTED: 3373 *ap->a_retval = 3374 (pcp->pc_chownrestricted == nfs_true); 3375 break; 3376 case _PC_NO_TRUNC: 3377 *ap->a_retval = 3378 (pcp->pc_notrunc == nfs_true); 3379 break; 3380 } 3381 } 3382 nfsm_reqdone; 3383 break; 3384 case _PC_FILESIZEBITS: 3385 #ifndef NFS_V2_ONLY 3386 if (v3) { 3387 nmp = VFSTONFS(vp->v_mount); 3388 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3389 if ((error = nfs_fsinfo(nmp, vp, 3390 curproc->p_ucred, curlwp)) != 0) /* XXX */ 3391 break; 3392 for (l = 0, maxsize = nmp->nm_maxfilesize; 3393 (maxsize >> l) > 0; l++) 3394 ; 3395 *ap->a_retval = l + 1; 3396 } else 3397 #endif 3398 { 3399 *ap->a_retval = 32; /* NFS V2 limitation */ 3400 } 3401 break; 3402 default: 3403 error = EINVAL; 3404 break; 3405 } 3406 3407 return (error); 3408 } 3409 3410 /* 3411 * NFS advisory byte-level locks. 3412 */ 3413 int 3414 nfs_advlock(v) 3415 void *v; 3416 { 3417 struct vop_advlock_args /* { 3418 struct vnode *a_vp; 3419 caddr_t a_id; 3420 int a_op; 3421 struct flock *a_fl; 3422 int a_flags; 3423 } */ *ap = v; 3424 struct nfsnode *np = VTONFS(ap->a_vp); 3425 3426 return lf_advlock(ap, &np->n_lockf, np->n_size); 3427 } 3428 3429 /* 3430 * Print out the contents of an nfsnode. 3431 */ 3432 int 3433 nfs_print(v) 3434 void *v; 3435 { 3436 struct vop_print_args /* { 3437 struct vnode *a_vp; 3438 } */ *ap = v; 3439 struct vnode *vp = ap->a_vp; 3440 struct nfsnode *np = VTONFS(vp); 3441 3442 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3443 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3444 if (vp->v_type == VFIFO) 3445 fifo_printinfo(vp); 3446 printf("\n"); 3447 return (0); 3448 } 3449 3450 /* 3451 * nfs unlock wrapper. 3452 */ 3453 int 3454 nfs_unlock(void *v) 3455 { 3456 struct vop_unlock_args /* { 3457 struct vnode *a_vp; 3458 int a_flags; 3459 } */ *ap = v; 3460 struct vnode *vp = ap->a_vp; 3461 3462 /* 3463 * VOP_UNLOCK can be called by nfs_loadattrcache 3464 * with v_data == 0. 3465 */ 3466 if (VTONFS(vp)) { 3467 nfs_delayedtruncate(vp); 3468 } 3469 3470 return genfs_unlock(v); 3471 } 3472 3473 /* 3474 * nfs special file access vnode op. 3475 * Essentially just get vattr and then imitate iaccess() since the device is 3476 * local to the client. 3477 */ 3478 int 3479 nfsspec_access(v) 3480 void *v; 3481 { 3482 struct vop_access_args /* { 3483 struct vnode *a_vp; 3484 int a_mode; 3485 struct ucred *a_cred; 3486 struct lwp *a_l; 3487 } */ *ap = v; 3488 struct vattr va; 3489 struct vnode *vp = ap->a_vp; 3490 int error; 3491 3492 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_l); 3493 if (error) 3494 return (error); 3495 3496 /* 3497 * Disallow write attempts on filesystems mounted read-only; 3498 * unless the file is a socket, fifo, or a block or character 3499 * device resident on the filesystem. 3500 */ 3501 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3502 switch (vp->v_type) { 3503 case VREG: 3504 case VDIR: 3505 case VLNK: 3506 return (EROFS); 3507 default: 3508 break; 3509 } 3510 } 3511 3512 return (vaccess(va.va_type, va.va_mode, 3513 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3514 } 3515 3516 /* 3517 * Read wrapper for special devices. 3518 */ 3519 int 3520 nfsspec_read(v) 3521 void *v; 3522 { 3523 struct vop_read_args /* { 3524 struct vnode *a_vp; 3525 struct uio *a_uio; 3526 int a_ioflag; 3527 struct ucred *a_cred; 3528 } */ *ap = v; 3529 struct nfsnode *np = VTONFS(ap->a_vp); 3530 3531 /* 3532 * Set access flag. 3533 */ 3534 np->n_flag |= NACC; 3535 getnanotime(&np->n_atim); 3536 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3537 } 3538 3539 /* 3540 * Write wrapper for special devices. 3541 */ 3542 int 3543 nfsspec_write(v) 3544 void *v; 3545 { 3546 struct vop_write_args /* { 3547 struct vnode *a_vp; 3548 struct uio *a_uio; 3549 int a_ioflag; 3550 struct ucred *a_cred; 3551 } */ *ap = v; 3552 struct nfsnode *np = VTONFS(ap->a_vp); 3553 3554 /* 3555 * Set update flag. 3556 */ 3557 np->n_flag |= NUPD; 3558 getnanotime(&np->n_mtim); 3559 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3560 } 3561 3562 /* 3563 * Close wrapper for special devices. 3564 * 3565 * Update the times on the nfsnode then do device close. 3566 */ 3567 int 3568 nfsspec_close(v) 3569 void *v; 3570 { 3571 struct vop_close_args /* { 3572 struct vnode *a_vp; 3573 int a_fflag; 3574 struct ucred *a_cred; 3575 struct lwp *a_l; 3576 } */ *ap = v; 3577 struct vnode *vp = ap->a_vp; 3578 struct nfsnode *np = VTONFS(vp); 3579 struct vattr vattr; 3580 3581 if (np->n_flag & (NACC | NUPD)) { 3582 np->n_flag |= NCHG; 3583 if (vp->v_usecount == 1 && 3584 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3585 VATTR_NULL(&vattr); 3586 if (np->n_flag & NACC) 3587 vattr.va_atime = np->n_atim; 3588 if (np->n_flag & NUPD) 3589 vattr.va_mtime = np->n_mtim; 3590 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3591 } 3592 } 3593 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3594 } 3595 3596 /* 3597 * Read wrapper for fifos. 3598 */ 3599 int 3600 nfsfifo_read(v) 3601 void *v; 3602 { 3603 struct vop_read_args /* { 3604 struct vnode *a_vp; 3605 struct uio *a_uio; 3606 int a_ioflag; 3607 struct ucred *a_cred; 3608 } */ *ap = v; 3609 struct nfsnode *np = VTONFS(ap->a_vp); 3610 3611 /* 3612 * Set access flag. 3613 */ 3614 np->n_flag |= NACC; 3615 getnanotime(&np->n_atim); 3616 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3617 } 3618 3619 /* 3620 * Write wrapper for fifos. 3621 */ 3622 int 3623 nfsfifo_write(v) 3624 void *v; 3625 { 3626 struct vop_write_args /* { 3627 struct vnode *a_vp; 3628 struct uio *a_uio; 3629 int a_ioflag; 3630 struct ucred *a_cred; 3631 } */ *ap = v; 3632 struct nfsnode *np = VTONFS(ap->a_vp); 3633 3634 /* 3635 * Set update flag. 3636 */ 3637 np->n_flag |= NUPD; 3638 getnanotime(&np->n_mtim); 3639 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3640 } 3641 3642 /* 3643 * Close wrapper for fifos. 3644 * 3645 * Update the times on the nfsnode then do fifo close. 3646 */ 3647 int 3648 nfsfifo_close(v) 3649 void *v; 3650 { 3651 struct vop_close_args /* { 3652 struct vnode *a_vp; 3653 int a_fflag; 3654 struct ucred *a_cred; 3655 struct lwp *a_l; 3656 } */ *ap = v; 3657 struct vnode *vp = ap->a_vp; 3658 struct nfsnode *np = VTONFS(vp); 3659 struct vattr vattr; 3660 3661 if (np->n_flag & (NACC | NUPD)) { 3662 struct timespec ts; 3663 3664 getnanotime(&ts); 3665 if (np->n_flag & NACC) 3666 np->n_atim = ts; 3667 if (np->n_flag & NUPD) 3668 np->n_mtim = ts; 3669 np->n_flag |= NCHG; 3670 if (vp->v_usecount == 1 && 3671 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3672 VATTR_NULL(&vattr); 3673 if (np->n_flag & NACC) 3674 vattr.va_atime = np->n_atim; 3675 if (np->n_flag & NUPD) 3676 vattr.va_mtime = np->n_mtim; 3677 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3678 } 3679 } 3680 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3681 } 3682
Indexes created Wed Oct 15 16:09:53 GMT 2025