nfs_vnops.c revision 1.247
1 /* $NetBSD: nfs_vnops.c,v 1.247 2006/12/27 12:10:09 yamt 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 1.247 2006/12/27 12:10:09 yamt 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 #include <sys/kauth.h> 68 69 #include <uvm/uvm_extern.h> 70 #include <uvm/uvm.h> 71 72 #include <miscfs/fifofs/fifo.h> 73 #include <miscfs/genfs/genfs.h> 74 #include <miscfs/genfs/genfs_node.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nfs_var.h> 85 86 #include <net/if.h> 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 90 /* 91 * Global vfs data structures for nfs 92 */ 93 int (**nfsv2_vnodeop_p) __P((void *)); 94 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 95 { &vop_default_desc, vn_default_error }, 96 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 97 { &vop_create_desc, nfs_create }, /* create */ 98 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 99 { &vop_open_desc, nfs_open }, /* open */ 100 { &vop_close_desc, nfs_close }, /* close */ 101 { &vop_access_desc, nfs_access }, /* access */ 102 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 103 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 104 { &vop_read_desc, nfs_read }, /* read */ 105 { &vop_write_desc, nfs_write }, /* write */ 106 { &vop_lease_desc, nfs_lease_check }, /* lease */ 107 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 108 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 109 { &vop_poll_desc, nfs_poll }, /* poll */ 110 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 135 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 136 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 137 { NULL, NULL } 138 }; 139 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 140 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 141 142 /* 143 * Special device vnode ops 144 */ 145 int (**spec_nfsv2nodeop_p) __P((void *)); 146 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 147 { &vop_default_desc, vn_default_error }, 148 { &vop_lookup_desc, spec_lookup }, /* lookup */ 149 { &vop_create_desc, spec_create }, /* create */ 150 { &vop_mknod_desc, spec_mknod }, /* mknod */ 151 { &vop_open_desc, spec_open }, /* open */ 152 { &vop_close_desc, nfsspec_close }, /* close */ 153 { &vop_access_desc, nfsspec_access }, /* access */ 154 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 155 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 156 { &vop_read_desc, nfsspec_read }, /* read */ 157 { &vop_write_desc, nfsspec_write }, /* write */ 158 { &vop_lease_desc, spec_lease_check }, /* lease */ 159 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 160 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 161 { &vop_poll_desc, spec_poll }, /* poll */ 162 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 163 { &vop_revoke_desc, spec_revoke }, /* revoke */ 164 { &vop_mmap_desc, spec_mmap }, /* mmap */ 165 { &vop_fsync_desc, spec_fsync }, /* fsync */ 166 { &vop_seek_desc, spec_seek }, /* seek */ 167 { &vop_remove_desc, spec_remove }, /* remove */ 168 { &vop_link_desc, spec_link }, /* link */ 169 { &vop_rename_desc, spec_rename }, /* rename */ 170 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 171 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 172 { &vop_symlink_desc, spec_symlink }, /* symlink */ 173 { &vop_readdir_desc, spec_readdir }, /* readdir */ 174 { &vop_readlink_desc, spec_readlink }, /* readlink */ 175 { &vop_abortop_desc, spec_abortop }, /* abortop */ 176 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 177 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 178 { &vop_lock_desc, nfs_lock }, /* lock */ 179 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 180 { &vop_bmap_desc, spec_bmap }, /* bmap */ 181 { &vop_strategy_desc, spec_strategy }, /* strategy */ 182 { &vop_print_desc, nfs_print }, /* print */ 183 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 184 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 185 { &vop_advlock_desc, spec_advlock }, /* advlock */ 186 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 187 { &vop_getpages_desc, spec_getpages }, /* getpages */ 188 { &vop_putpages_desc, spec_putpages }, /* putpages */ 189 { NULL, NULL } 190 }; 191 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 192 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 193 194 int (**fifo_nfsv2nodeop_p) __P((void *)); 195 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 196 { &vop_default_desc, vn_default_error }, 197 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 198 { &vop_create_desc, fifo_create }, /* create */ 199 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 200 { &vop_open_desc, fifo_open }, /* open */ 201 { &vop_close_desc, nfsfifo_close }, /* close */ 202 { &vop_access_desc, nfsspec_access }, /* access */ 203 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 204 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 205 { &vop_read_desc, nfsfifo_read }, /* read */ 206 { &vop_write_desc, nfsfifo_write }, /* write */ 207 { &vop_lease_desc, fifo_lease_check }, /* lease */ 208 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 209 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 210 { &vop_poll_desc, fifo_poll }, /* poll */ 211 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 212 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 213 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 214 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 215 { &vop_seek_desc, fifo_seek }, /* seek */ 216 { &vop_remove_desc, fifo_remove }, /* remove */ 217 { &vop_link_desc, fifo_link }, /* link */ 218 { &vop_rename_desc, fifo_rename }, /* rename */ 219 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 220 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 221 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 222 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 223 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 224 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 225 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 226 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 227 { &vop_lock_desc, nfs_lock }, /* lock */ 228 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 229 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 230 { &vop_strategy_desc, genfs_badop }, /* strategy */ 231 { &vop_print_desc, nfs_print }, /* print */ 232 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 233 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 234 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 235 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 236 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 237 { NULL, NULL } 238 }; 239 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 240 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 241 242 static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, 243 size_t, kauth_cred_t, struct lwp *); 244 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 245 246 /* 247 * Global variables 248 */ 249 extern u_int32_t nfs_true, nfs_false; 250 extern u_int32_t nfs_xdrneg1; 251 extern const nfstype nfsv3_type[9]; 252 253 int nfs_numasync = 0; 254 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 255 #define UIO_ADVANCE(uio, siz) \ 256 (void)((uio)->uio_resid -= (siz), \ 257 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 258 (uio)->uio_iov->iov_len -= (siz)) 259 260 static void nfs_cache_enter(struct vnode *, struct vnode *, 261 struct componentname *); 262 263 static void 264 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 265 struct componentname *cnp) 266 { 267 struct nfsnode *dnp = VTONFS(dvp); 268 269 if (vp != NULL) { 270 struct nfsnode *np = VTONFS(vp); 271 272 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 273 } 274 275 if (!timespecisset(&dnp->n_nctime)) 276 dnp->n_nctime = dnp->n_vattr->va_mtime; 277 278 cache_enter(dvp, vp, cnp); 279 } 280 281 /* 282 * nfs null call from vfs. 283 */ 284 int 285 nfs_null(vp, cred, l) 286 struct vnode *vp; 287 kauth_cred_t cred; 288 struct lwp *l; 289 { 290 caddr_t bpos, dpos; 291 int error = 0; 292 struct mbuf *mreq, *mrep, *md, *mb; 293 struct nfsnode *np = VTONFS(vp); 294 295 nfsm_reqhead(np, NFSPROC_NULL, 0); 296 nfsm_request(np, NFSPROC_NULL, l, cred); 297 nfsm_reqdone; 298 return (error); 299 } 300 301 /* 302 * nfs access vnode op. 303 * For nfs version 2, just return ok. File accesses may fail later. 304 * For nfs version 3, use the access rpc to check accessibility. If file modes 305 * are changed on the server, accesses might still fail later. 306 */ 307 int 308 nfs_access(v) 309 void *v; 310 { 311 struct vop_access_args /* { 312 struct vnode *a_vp; 313 int a_mode; 314 kauth_cred_t a_cred; 315 struct lwp *a_l; 316 } */ *ap = v; 317 struct vnode *vp = ap->a_vp; 318 #ifndef NFS_V2_ONLY 319 u_int32_t *tl; 320 caddr_t cp; 321 int32_t t1, t2; 322 caddr_t bpos, dpos, cp2; 323 int error = 0, attrflag; 324 struct mbuf *mreq, *mrep, *md, *mb; 325 u_int32_t mode, rmode; 326 const int v3 = NFS_ISV3(vp); 327 #endif 328 int cachevalid; 329 struct nfsnode *np = VTONFS(vp); 330 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 331 332 cachevalid = (np->n_accstamp != -1 && 333 (time_uptime - np->n_accstamp) < NFS_ATTRTIMEO(nmp, np) && 334 np->n_accuid == kauth_cred_geteuid(ap->a_cred)); 335 336 /* 337 * Check access cache first. If this request has been made for this 338 * uid shortly before, use the cached result. 339 */ 340 if (cachevalid) { 341 if (!np->n_accerror) { 342 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 343 return np->n_accerror; 344 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 345 return np->n_accerror; 346 } 347 348 #ifndef NFS_V2_ONLY 349 /* 350 * For nfs v3, do an access rpc, otherwise you are stuck emulating 351 * ufs_access() locally using the vattr. This may not be correct, 352 * since the server may apply other access criteria such as 353 * client uid-->server uid mapping that we do not know about, but 354 * this is better than just returning anything that is lying about 355 * in the cache. 356 */ 357 if (v3) { 358 nfsstats.rpccnt[NFSPROC_ACCESS]++; 359 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 360 nfsm_fhtom(np, v3); 361 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 362 if (ap->a_mode & VREAD) 363 mode = NFSV3ACCESS_READ; 364 else 365 mode = 0; 366 if (vp->v_type != VDIR) { 367 if (ap->a_mode & VWRITE) 368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 369 if (ap->a_mode & VEXEC) 370 mode |= NFSV3ACCESS_EXECUTE; 371 } else { 372 if (ap->a_mode & VWRITE) 373 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 374 NFSV3ACCESS_DELETE); 375 if (ap->a_mode & VEXEC) 376 mode |= NFSV3ACCESS_LOOKUP; 377 } 378 *tl = txdr_unsigned(mode); 379 nfsm_request(np, NFSPROC_ACCESS, ap->a_l, ap->a_cred); 380 nfsm_postop_attr(vp, attrflag, 0); 381 if (!error) { 382 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 383 rmode = fxdr_unsigned(u_int32_t, *tl); 384 /* 385 * The NFS V3 spec does not clarify whether or not 386 * the returned access bits can be a superset of 387 * the ones requested, so... 388 */ 389 if ((rmode & mode) != mode) 390 error = EACCES; 391 } 392 nfsm_reqdone; 393 } else 394 #endif 395 return (nfsspec_access(ap)); 396 #ifndef NFS_V2_ONLY 397 /* 398 * Disallow write attempts on filesystems mounted read-only; 399 * unless the file is a socket, fifo, or a block or character 400 * device resident on the filesystem. 401 */ 402 if (!error && (ap->a_mode & VWRITE) && 403 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 404 switch (vp->v_type) { 405 case VREG: 406 case VDIR: 407 case VLNK: 408 error = EROFS; 409 default: 410 break; 411 } 412 } 413 414 if (!error || error == EACCES) { 415 /* 416 * If we got the same result as for a previous, 417 * different request, OR it in. Don't update 418 * the timestamp in that case. 419 */ 420 if (cachevalid && np->n_accstamp != -1 && 421 error == np->n_accerror) { 422 if (!error) 423 np->n_accmode |= ap->a_mode; 424 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 425 np->n_accmode = ap->a_mode; 426 } else { 427 np->n_accstamp = time_uptime; 428 np->n_accuid = kauth_cred_geteuid(ap->a_cred); 429 np->n_accmode = ap->a_mode; 430 np->n_accerror = error; 431 } 432 } 433 434 return (error); 435 #endif 436 } 437 438 /* 439 * nfs open vnode op 440 * Check to see if the type is ok 441 * and that deletion is not in progress. 442 * For paged in text files, you will need to flush the page cache 443 * if consistency is lost. 444 */ 445 /* ARGSUSED */ 446 int 447 nfs_open(v) 448 void *v; 449 { 450 struct vop_open_args /* { 451 struct vnode *a_vp; 452 int a_mode; 453 kauth_cred_t a_cred; 454 struct lwp *a_l; 455 } */ *ap = v; 456 struct vnode *vp = ap->a_vp; 457 struct nfsnode *np = VTONFS(vp); 458 int error; 459 460 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 461 return (EACCES); 462 } 463 464 if (ap->a_mode & FREAD) { 465 if (np->n_rcred != NULL) 466 kauth_cred_free(np->n_rcred); 467 np->n_rcred = ap->a_cred; 468 kauth_cred_hold(np->n_rcred); 469 } 470 if (ap->a_mode & FWRITE) { 471 if (np->n_wcred != NULL) 472 kauth_cred_free(np->n_wcred); 473 np->n_wcred = ap->a_cred; 474 kauth_cred_hold(np->n_wcred); 475 } 476 477 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_l, 0); 478 if (error) 479 return error; 480 481 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 482 483 return (0); 484 } 485 486 /* 487 * nfs close vnode op 488 * What an NFS client should do upon close after writing is a debatable issue. 489 * Most NFS clients push delayed writes to the server upon close, basically for 490 * two reasons: 491 * 1 - So that any write errors may be reported back to the client process 492 * doing the close system call. By far the two most likely errors are 493 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 494 * 2 - To put a worst case upper bound on cache inconsistency between 495 * multiple clients for the file. 496 * There is also a consistency problem for Version 2 of the protocol w.r.t. 497 * not being able to tell if other clients are writing a file concurrently, 498 * since there is no way of knowing if the changed modify time in the reply 499 * is only due to the write for this client. 500 * (NFS Version 3 provides weak cache consistency data in the reply that 501 * should be sufficient to detect and handle this case.) 502 * 503 * The current code does the following: 504 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 505 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 506 * or commit them (this satisfies 1 and 2 except for the 507 * case where the server crashes after this close but 508 * before the commit RPC, which is felt to be "good 509 * enough". Changing the last argument to nfs_flush() to 510 * a 1 would force a commit operation, if it is felt a 511 * commit is necessary now. 512 * for NQNFS - do nothing now, since 2 is dealt with via leases and 513 * 1 should be dealt with via an fsync() system call for 514 * cases where write errors are important. 515 */ 516 /* ARGSUSED */ 517 int 518 nfs_close(v) 519 void *v; 520 { 521 struct vop_close_args /* { 522 struct vnodeop_desc *a_desc; 523 struct vnode *a_vp; 524 int a_fflag; 525 kauth_cred_t a_cred; 526 struct lwp *a_l; 527 } */ *ap = v; 528 struct vnode *vp = ap->a_vp; 529 struct nfsnode *np = VTONFS(vp); 530 int error = 0; 531 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 532 533 if (vp->v_type == VREG) { 534 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 535 (np->n_flag & NMODIFIED)) { 536 #ifndef NFS_V2_ONLY 537 if (NFS_ISV3(vp)) { 538 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_l, 0); 539 np->n_flag &= ~NMODIFIED; 540 } else 541 #endif 542 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_l, 1); 543 NFS_INVALIDATE_ATTRCACHE(np); 544 } 545 if (np->n_flag & NWRITEERR) { 546 np->n_flag &= ~NWRITEERR; 547 error = np->n_error; 548 } 549 } 550 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 551 return (error); 552 } 553 554 /* 555 * nfs getattr call from vfs. 556 */ 557 int 558 nfs_getattr(v) 559 void *v; 560 { 561 struct vop_getattr_args /* { 562 struct vnode *a_vp; 563 struct vattr *a_vap; 564 kauth_cred_t a_cred; 565 struct lwp *a_l; 566 } */ *ap = v; 567 struct vnode *vp = ap->a_vp; 568 struct nfsnode *np = VTONFS(vp); 569 caddr_t cp; 570 u_int32_t *tl; 571 int32_t t1, t2; 572 caddr_t bpos, dpos; 573 int error = 0; 574 struct mbuf *mreq, *mrep, *md, *mb; 575 const int v3 = NFS_ISV3(vp); 576 577 /* 578 * Update local times for special files. 579 */ 580 if (np->n_flag & (NACC | NUPD)) 581 np->n_flag |= NCHG; 582 583 /* 584 * if we have delayed truncation, do it now. 585 */ 586 nfs_delayedtruncate(vp); 587 588 /* 589 * First look in the cache. 590 */ 591 if (nfs_getattrcache(vp, ap->a_vap) == 0) 592 return (0); 593 nfsstats.rpccnt[NFSPROC_GETATTR]++; 594 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 595 nfsm_fhtom(np, v3); 596 nfsm_request(np, NFSPROC_GETATTR, ap->a_l, ap->a_cred); 597 if (!error) { 598 nfsm_loadattr(vp, ap->a_vap, 0); 599 if (vp->v_type == VDIR && 600 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 601 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 602 } 603 nfsm_reqdone; 604 return (error); 605 } 606 607 /* 608 * nfs setattr call. 609 */ 610 int 611 nfs_setattr(v) 612 void *v; 613 { 614 struct vop_setattr_args /* { 615 struct vnodeop_desc *a_desc; 616 struct vnode *a_vp; 617 struct vattr *a_vap; 618 kauth_cred_t a_cred; 619 struct lwp *a_l; 620 } */ *ap = v; 621 struct vnode *vp = ap->a_vp; 622 struct nfsnode *np = VTONFS(vp); 623 struct vattr *vap = ap->a_vap; 624 int error = 0; 625 u_quad_t tsize = 0; 626 627 /* 628 * Setting of flags is not supported. 629 */ 630 if (vap->va_flags != VNOVAL) 631 return (EOPNOTSUPP); 632 633 /* 634 * Disallow write attempts if the filesystem is mounted read-only. 635 */ 636 if ((vap->va_uid != (uid_t)VNOVAL || 637 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 638 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 639 (vp->v_mount->mnt_flag & MNT_RDONLY)) 640 return (EROFS); 641 if (vap->va_size != VNOVAL) { 642 switch (vp->v_type) { 643 case VDIR: 644 return (EISDIR); 645 case VCHR: 646 case VBLK: 647 case VSOCK: 648 case VFIFO: 649 if (vap->va_mtime.tv_sec == VNOVAL && 650 vap->va_atime.tv_sec == VNOVAL && 651 vap->va_mode == (mode_t)VNOVAL && 652 vap->va_uid == (uid_t)VNOVAL && 653 vap->va_gid == (gid_t)VNOVAL) 654 return (0); 655 vap->va_size = VNOVAL; 656 break; 657 default: 658 /* 659 * Disallow write attempts if the filesystem is 660 * mounted read-only. 661 */ 662 if (vp->v_mount->mnt_flag & MNT_RDONLY) 663 return (EROFS); 664 genfs_node_wrlock(vp); 665 uvm_vnp_setsize(vp, vap->va_size); 666 tsize = np->n_size; 667 np->n_size = vap->va_size; 668 if (vap->va_size == 0) 669 error = nfs_vinvalbuf(vp, 0, 670 ap->a_cred, ap->a_l, 1); 671 else 672 error = nfs_vinvalbuf(vp, V_SAVE, 673 ap->a_cred, ap->a_l, 1); 674 if (error) { 675 uvm_vnp_setsize(vp, tsize); 676 genfs_node_unlock(vp); 677 return (error); 678 } 679 np->n_vattr->va_size = vap->va_size; 680 } 681 } else { 682 /* 683 * flush files before setattr because a later write of 684 * cached data might change timestamps or reset sugid bits 685 */ 686 if ((vap->va_mtime.tv_sec != VNOVAL || 687 vap->va_atime.tv_sec != VNOVAL || 688 vap->va_mode != VNOVAL) && 689 vp->v_type == VREG && 690 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 691 ap->a_l, 1)) == EINTR) 692 return (error); 693 } 694 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_l); 695 if (vap->va_size != VNOVAL) { 696 if (error) { 697 np->n_size = np->n_vattr->va_size = tsize; 698 uvm_vnp_setsize(vp, np->n_size); 699 } 700 genfs_node_unlock(vp); 701 } 702 VN_KNOTE(vp, NOTE_ATTRIB); 703 return (error); 704 } 705 706 /* 707 * Do an nfs setattr rpc. 708 */ 709 int 710 nfs_setattrrpc(vp, vap, cred, l) 711 struct vnode *vp; 712 struct vattr *vap; 713 kauth_cred_t cred; 714 struct lwp *l; 715 { 716 struct nfsv2_sattr *sp; 717 caddr_t cp; 718 int32_t t1, t2; 719 caddr_t bpos, dpos; 720 u_int32_t *tl; 721 int error = 0; 722 struct mbuf *mreq, *mrep, *md, *mb; 723 const int v3 = NFS_ISV3(vp); 724 struct nfsnode *np = VTONFS(vp); 725 #ifndef NFS_V2_ONLY 726 int wccflag = NFSV3_WCCRATTR; 727 caddr_t cp2; 728 #endif 729 730 nfsstats.rpccnt[NFSPROC_SETATTR]++; 731 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 732 nfsm_fhtom(np, v3); 733 #ifndef NFS_V2_ONLY 734 if (v3) { 735 nfsm_v3attrbuild(vap, TRUE); 736 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 737 *tl = nfs_false; 738 } else { 739 #endif 740 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 741 if (vap->va_mode == (mode_t)VNOVAL) 742 sp->sa_mode = nfs_xdrneg1; 743 else 744 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 745 if (vap->va_uid == (uid_t)VNOVAL) 746 sp->sa_uid = nfs_xdrneg1; 747 else 748 sp->sa_uid = txdr_unsigned(vap->va_uid); 749 if (vap->va_gid == (gid_t)VNOVAL) 750 sp->sa_gid = nfs_xdrneg1; 751 else 752 sp->sa_gid = txdr_unsigned(vap->va_gid); 753 sp->sa_size = txdr_unsigned(vap->va_size); 754 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 755 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 756 #ifndef NFS_V2_ONLY 757 } 758 #endif 759 nfsm_request(np, NFSPROC_SETATTR, l, cred); 760 #ifndef NFS_V2_ONLY 761 if (v3) { 762 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 763 } else 764 #endif 765 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 766 nfsm_reqdone; 767 return (error); 768 } 769 770 /* 771 * nfs lookup call, one step at a time... 772 * First look in cache 773 * If not found, unlock the directory nfsnode and do the rpc 774 * 775 * This code is full of lock/unlock statements and checks, because 776 * we continue after cache_lookup has finished (we need to check 777 * with the attr cache and do an rpc if it has timed out). This means 778 * that the locking effects of cache_lookup have to be taken into 779 * account. 780 */ 781 int 782 nfs_lookup(v) 783 void *v; 784 { 785 struct vop_lookup_args /* { 786 struct vnodeop_desc *a_desc; 787 struct vnode *a_dvp; 788 struct vnode **a_vpp; 789 struct componentname *a_cnp; 790 } */ *ap = v; 791 struct componentname *cnp = ap->a_cnp; 792 struct vnode *dvp = ap->a_dvp; 793 struct vnode **vpp = ap->a_vpp; 794 int flags; 795 struct vnode *newvp; 796 u_int32_t *tl; 797 caddr_t cp; 798 int32_t t1, t2; 799 caddr_t bpos, dpos, cp2; 800 struct mbuf *mreq, *mrep, *md, *mb; 801 long len; 802 nfsfh_t *fhp; 803 struct nfsnode *np; 804 int error = 0, attrflag, fhsize; 805 const int v3 = NFS_ISV3(dvp); 806 807 flags = cnp->cn_flags; 808 809 *vpp = NULLVP; 810 newvp = NULLVP; 811 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 812 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 813 return (EROFS); 814 if (dvp->v_type != VDIR) 815 return (ENOTDIR); 816 817 /* 818 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 819 */ 820 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 821 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 822 if (error) 823 return error; 824 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 825 return EISDIR; 826 VREF(dvp); 827 *vpp = dvp; 828 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 829 cnp->cn_flags |= SAVENAME; 830 return 0; 831 } 832 833 np = VTONFS(dvp); 834 835 /* 836 * Before tediously performing a linear scan of the directory, 837 * check the name cache to see if the directory/name pair 838 * we are looking for is known already. 839 * If the directory/name pair is found in the name cache, 840 * we have to ensure the directory has not changed from 841 * the time the cache entry has been created. If it has, 842 * the cache entry has to be ignored. 843 */ 844 error = cache_lookup_raw(dvp, vpp, cnp); 845 KASSERT(dvp != *vpp); 846 if (error >= 0) { 847 struct vattr vattr; 848 int err2; 849 850 if (error && error != ENOENT) { 851 *vpp = NULLVP; 852 return error; 853 } 854 855 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 856 if (err2 != 0) { 857 if (error == 0) 858 vrele(*vpp); 859 *vpp = NULLVP; 860 return err2; 861 } 862 863 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 864 cnp->cn_lwp) || timespeccmp(&vattr.va_mtime, 865 &VTONFS(dvp)->n_nctime, !=)) { 866 if (error == 0) { 867 vrele(*vpp); 868 *vpp = NULLVP; 869 } 870 cache_purge1(dvp, NULL, PURGE_CHILDREN); 871 timespecclear(&np->n_nctime); 872 goto dorpc; 873 } 874 875 if (error == ENOENT) { 876 goto noentry; 877 } 878 879 newvp = *vpp; 880 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp) 881 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 882 nfsstats.lookupcache_hits++; 883 if ((flags & ISDOTDOT) != 0) { 884 VOP_UNLOCK(dvp, 0); 885 } 886 error = vn_lock(newvp, LK_EXCLUSIVE); 887 if ((flags & ISDOTDOT) != 0) { 888 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 889 } 890 if (error) { 891 /* newvp has been revoked. */ 892 vrele(newvp); 893 *vpp = NULL; 894 return error; 895 } 896 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 897 cnp->cn_flags |= SAVENAME; 898 KASSERT(newvp->v_type != VNON); 899 return (0); 900 } 901 cache_purge1(newvp, NULL, PURGE_PARENTS); 902 vrele(newvp); 903 *vpp = NULLVP; 904 } 905 dorpc: 906 #if 0 907 /* 908 * because nfsv3 has the same CREATE semantics as ours, 909 * we don't have to perform LOOKUPs beforehand. 910 * 911 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 912 * XXX although we have no way to know if O_EXCL is requested or not. 913 */ 914 915 if (v3 && cnp->cn_nameiop == CREATE && 916 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 917 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 918 cnp->cn_flags |= SAVENAME; 919 return (EJUSTRETURN); 920 } 921 #endif /* 0 */ 922 923 error = 0; 924 newvp = NULLVP; 925 nfsstats.lookupcache_misses++; 926 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 927 len = cnp->cn_namelen; 928 nfsm_reqhead(np, NFSPROC_LOOKUP, 929 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 930 nfsm_fhtom(np, v3); 931 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 932 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_lwp, cnp->cn_cred); 933 if (error) { 934 nfsm_postop_attr(dvp, attrflag, 0); 935 m_freem(mrep); 936 goto nfsmout; 937 } 938 nfsm_getfh(fhp, fhsize, v3); 939 940 /* 941 * Handle RENAME case... 942 */ 943 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 944 if (NFS_CMPFH(np, fhp, fhsize)) { 945 m_freem(mrep); 946 return (EISDIR); 947 } 948 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 949 if (error) { 950 m_freem(mrep); 951 return error; 952 } 953 newvp = NFSTOV(np); 954 #ifndef NFS_V2_ONLY 955 if (v3) { 956 nfsm_postop_attr(newvp, attrflag, 0); 957 nfsm_postop_attr(dvp, attrflag, 0); 958 } else 959 #endif 960 nfsm_loadattr(newvp, (struct vattr *)0, 0); 961 *vpp = newvp; 962 m_freem(mrep); 963 cnp->cn_flags |= SAVENAME; 964 goto validate; 965 } 966 967 /* 968 * The postop attr handling is duplicated for each if case, 969 * because it should be done while dvp is locked (unlocking 970 * dvp is different for each case). 971 */ 972 973 if (NFS_CMPFH(np, fhp, fhsize)) { 974 /* 975 * "." lookup 976 */ 977 VREF(dvp); 978 newvp = dvp; 979 #ifndef NFS_V2_ONLY 980 if (v3) { 981 nfsm_postop_attr(newvp, attrflag, 0); 982 nfsm_postop_attr(dvp, attrflag, 0); 983 } else 984 #endif 985 nfsm_loadattr(newvp, (struct vattr *)0, 0); 986 } else if (flags & ISDOTDOT) { 987 /* 988 * ".." lookup 989 */ 990 VOP_UNLOCK(dvp, 0); 991 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 992 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 993 if (error) { 994 m_freem(mrep); 995 return error; 996 } 997 newvp = NFSTOV(np); 998 999 #ifndef NFS_V2_ONLY 1000 if (v3) { 1001 nfsm_postop_attr(newvp, attrflag, 0); 1002 nfsm_postop_attr(dvp, attrflag, 0); 1003 } else 1004 #endif 1005 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1006 } else { 1007 /* 1008 * Other lookups. 1009 */ 1010 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1011 if (error) { 1012 m_freem(mrep); 1013 return error; 1014 } 1015 newvp = NFSTOV(np); 1016 #ifndef NFS_V2_ONLY 1017 if (v3) { 1018 nfsm_postop_attr(newvp, attrflag, 0); 1019 nfsm_postop_attr(dvp, attrflag, 0); 1020 } else 1021 #endif 1022 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1023 } 1024 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1025 cnp->cn_flags |= SAVENAME; 1026 if ((cnp->cn_flags & MAKEENTRY) && 1027 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1028 nfs_cache_enter(dvp, newvp, cnp); 1029 } 1030 *vpp = newvp; 1031 nfsm_reqdone; 1032 if (error) { 1033 /* 1034 * We get here only because of errors returned by 1035 * the RPC. Otherwise we'll have returned above 1036 * (the nfsm_* macros will jump to nfsm_reqdone 1037 * on error). 1038 */ 1039 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1040 cnp->cn_nameiop != CREATE) { 1041 nfs_cache_enter(dvp, NULL, cnp); 1042 } 1043 if (newvp != NULLVP) { 1044 if (newvp == dvp) { 1045 vrele(newvp); 1046 } else { 1047 vput(newvp); 1048 } 1049 } 1050 noentry: 1051 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1052 (flags & ISLASTCN) && error == ENOENT) { 1053 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1054 error = EROFS; 1055 } else { 1056 error = EJUSTRETURN; 1057 cnp->cn_flags |= SAVENAME; 1058 } 1059 } 1060 *vpp = NULL; 1061 return error; 1062 } 1063 1064 validate: 1065 /* 1066 * make sure we have valid type and size. 1067 */ 1068 1069 newvp = *vpp; 1070 if (newvp->v_type == VNON) { 1071 struct vattr vattr; /* dummy */ 1072 1073 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1074 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp); 1075 if (error) { 1076 vput(newvp); 1077 *vpp = NULL; 1078 } 1079 } 1080 1081 return error; 1082 } 1083 1084 /* 1085 * nfs read call. 1086 * Just call nfs_bioread() to do the work. 1087 */ 1088 int 1089 nfs_read(v) 1090 void *v; 1091 { 1092 struct vop_read_args /* { 1093 struct vnode *a_vp; 1094 struct uio *a_uio; 1095 int a_ioflag; 1096 kauth_cred_t a_cred; 1097 } */ *ap = v; 1098 struct vnode *vp = ap->a_vp; 1099 1100 if (vp->v_type != VREG) 1101 return EISDIR; 1102 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1103 } 1104 1105 /* 1106 * nfs readlink call 1107 */ 1108 int 1109 nfs_readlink(v) 1110 void *v; 1111 { 1112 struct vop_readlink_args /* { 1113 struct vnode *a_vp; 1114 struct uio *a_uio; 1115 kauth_cred_t a_cred; 1116 } */ *ap = v; 1117 struct vnode *vp = ap->a_vp; 1118 struct nfsnode *np = VTONFS(vp); 1119 1120 if (vp->v_type != VLNK) 1121 return (EPERM); 1122 1123 if (np->n_rcred != NULL) { 1124 kauth_cred_free(np->n_rcred); 1125 } 1126 np->n_rcred = ap->a_cred; 1127 kauth_cred_hold(np->n_rcred); 1128 1129 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1130 } 1131 1132 /* 1133 * Do a readlink rpc. 1134 * Called by nfs_doio() from below the buffer cache. 1135 */ 1136 int 1137 nfs_readlinkrpc(vp, uiop, cred) 1138 struct vnode *vp; 1139 struct uio *uiop; 1140 kauth_cred_t cred; 1141 { 1142 u_int32_t *tl; 1143 caddr_t cp; 1144 int32_t t1, t2; 1145 caddr_t bpos, dpos, cp2; 1146 int error = 0; 1147 uint32_t len; 1148 struct mbuf *mreq, *mrep, *md, *mb; 1149 const int v3 = NFS_ISV3(vp); 1150 struct nfsnode *np = VTONFS(vp); 1151 #ifndef NFS_V2_ONLY 1152 int attrflag; 1153 #endif 1154 1155 nfsstats.rpccnt[NFSPROC_READLINK]++; 1156 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1157 nfsm_fhtom(np, v3); 1158 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1159 #ifndef NFS_V2_ONLY 1160 if (v3) 1161 nfsm_postop_attr(vp, attrflag, 0); 1162 #endif 1163 if (!error) { 1164 #ifndef NFS_V2_ONLY 1165 if (v3) { 1166 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1167 len = fxdr_unsigned(uint32_t, *tl); 1168 if (len > MAXPATHLEN) { 1169 /* 1170 * this pathname is too long for us. 1171 */ 1172 m_freem(mrep); 1173 /* Solaris returns EINVAL. should we follow? */ 1174 error = ENAMETOOLONG; 1175 goto nfsmout; 1176 } 1177 } else 1178 #endif 1179 { 1180 nfsm_strsiz(len, NFS_MAXPATHLEN); 1181 } 1182 nfsm_mtouio(uiop, len); 1183 } 1184 nfsm_reqdone; 1185 return (error); 1186 } 1187 1188 /* 1189 * nfs read rpc call 1190 * Ditto above 1191 */ 1192 int 1193 nfs_readrpc(vp, uiop) 1194 struct vnode *vp; 1195 struct uio *uiop; 1196 { 1197 u_int32_t *tl; 1198 caddr_t cp; 1199 int32_t t1, t2; 1200 caddr_t bpos, dpos, cp2; 1201 struct mbuf *mreq, *mrep, *md, *mb; 1202 struct nfsmount *nmp; 1203 int error = 0, len, retlen, tsiz, eof, byte_count; 1204 const int v3 = NFS_ISV3(vp); 1205 struct nfsnode *np = VTONFS(vp); 1206 #ifndef NFS_V2_ONLY 1207 int attrflag; 1208 #endif 1209 1210 #ifndef nolint 1211 eof = 0; 1212 #endif 1213 nmp = VFSTONFS(vp->v_mount); 1214 tsiz = uiop->uio_resid; 1215 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1216 return (EFBIG); 1217 iostat_busy(nmp->nm_stats); 1218 byte_count = 0; /* count bytes actually transferred */ 1219 while (tsiz > 0) { 1220 nfsstats.rpccnt[NFSPROC_READ]++; 1221 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1222 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1223 nfsm_fhtom(np, v3); 1224 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1225 #ifndef NFS_V2_ONLY 1226 if (v3) { 1227 txdr_hyper(uiop->uio_offset, tl); 1228 *(tl + 2) = txdr_unsigned(len); 1229 } else 1230 #endif 1231 { 1232 *tl++ = txdr_unsigned(uiop->uio_offset); 1233 *tl++ = txdr_unsigned(len); 1234 *tl = 0; 1235 } 1236 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1237 #ifndef NFS_V2_ONLY 1238 if (v3) { 1239 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1240 if (error) { 1241 m_freem(mrep); 1242 goto nfsmout; 1243 } 1244 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1245 eof = fxdr_unsigned(int, *(tl + 1)); 1246 } else 1247 #endif 1248 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1249 nfsm_strsiz(retlen, nmp->nm_rsize); 1250 nfsm_mtouio(uiop, retlen); 1251 m_freem(mrep); 1252 tsiz -= retlen; 1253 byte_count += retlen; 1254 #ifndef NFS_V2_ONLY 1255 if (v3) { 1256 if (eof || retlen == 0) 1257 tsiz = 0; 1258 } else 1259 #endif 1260 if (retlen < len) 1261 tsiz = 0; 1262 } 1263 nfsmout: 1264 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1265 return (error); 1266 } 1267 1268 struct nfs_writerpc_context { 1269 struct simplelock nwc_slock; 1270 volatile int nwc_mbufcount; 1271 }; 1272 1273 /* 1274 * free mbuf used to refer protected pages while write rpc call. 1275 * called at splvm. 1276 */ 1277 static void 1278 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf, size_t size, void *arg) 1279 { 1280 struct nfs_writerpc_context *ctx = arg; 1281 1282 KASSERT(m != NULL); 1283 KASSERT(ctx != NULL); 1284 pool_cache_put(&mbpool_cache, m); 1285 simple_lock(&ctx->nwc_slock); 1286 if (--ctx->nwc_mbufcount == 0) { 1287 wakeup(ctx); 1288 } 1289 simple_unlock(&ctx->nwc_slock); 1290 } 1291 1292 /* 1293 * nfs write call 1294 */ 1295 int 1296 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1297 struct vnode *vp; 1298 struct uio *uiop; 1299 int *iomode; 1300 boolean_t pageprotected; 1301 boolean_t *stalewriteverfp; 1302 { 1303 u_int32_t *tl; 1304 caddr_t cp; 1305 int32_t t1, t2; 1306 caddr_t bpos, dpos; 1307 struct mbuf *mreq, *mrep, *md, *mb; 1308 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1309 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1310 const int v3 = NFS_ISV3(vp); 1311 int committed = NFSV3WRITE_FILESYNC; 1312 struct nfsnode *np = VTONFS(vp); 1313 struct nfs_writerpc_context ctx; 1314 int s, byte_count; 1315 struct lwp *l = NULL; 1316 size_t origresid; 1317 #ifndef NFS_V2_ONLY 1318 caddr_t cp2; 1319 int rlen, commit; 1320 #endif 1321 1322 simple_lock_init(&ctx.nwc_slock); 1323 ctx.nwc_mbufcount = 1; 1324 1325 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1326 panic("writerpc readonly vp %p", vp); 1327 } 1328 1329 #ifdef DIAGNOSTIC 1330 if (uiop->uio_iovcnt != 1) 1331 panic("nfs: writerpc iovcnt > 1"); 1332 #endif 1333 tsiz = uiop->uio_resid; 1334 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1335 return (EFBIG); 1336 if (pageprotected) { 1337 l = curlwp; 1338 PHOLD(l); 1339 } 1340 retry: 1341 origresid = uiop->uio_resid; 1342 KASSERT(origresid == uiop->uio_iov->iov_len); 1343 iostat_busy(nmp->nm_stats); 1344 byte_count = 0; /* count of bytes actually written */ 1345 while (tsiz > 0) { 1346 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1347 uint32_t backup; 1348 boolean_t stalewriteverf = FALSE; 1349 1350 nfsstats.rpccnt[NFSPROC_WRITE]++; 1351 len = min(tsiz, nmp->nm_wsize); 1352 datalen = pageprotected ? 0 : nfsm_rndup(len); 1353 nfsm_reqhead(np, NFSPROC_WRITE, 1354 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1355 nfsm_fhtom(np, v3); 1356 #ifndef NFS_V2_ONLY 1357 if (v3) { 1358 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1359 txdr_hyper(uiop->uio_offset, tl); 1360 tl += 2; 1361 *tl++ = txdr_unsigned(len); 1362 *tl++ = txdr_unsigned(*iomode); 1363 *tl = txdr_unsigned(len); 1364 } else 1365 #endif 1366 { 1367 u_int32_t x; 1368 1369 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1370 /* Set both "begin" and "current" to non-garbage. */ 1371 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1372 *tl++ = x; /* "begin offset" */ 1373 *tl++ = x; /* "current offset" */ 1374 x = txdr_unsigned(len); 1375 *tl++ = x; /* total to this offset */ 1376 *tl = x; /* size of this write */ 1377 1378 } 1379 if (pageprotected) { 1380 /* 1381 * since we know pages can't be modified during i/o, 1382 * no need to copy them for us. 1383 */ 1384 struct mbuf *m; 1385 struct iovec *iovp = uiop->uio_iov; 1386 1387 m = m_get(M_WAIT, MT_DATA); 1388 MCLAIM(m, &nfs_mowner); 1389 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1390 nfs_writerpc_extfree, &ctx); 1391 m->m_flags |= M_EXT_ROMAP; 1392 m->m_len = len; 1393 mb->m_next = m; 1394 /* 1395 * no need to maintain mb and bpos here 1396 * because no one care them later. 1397 */ 1398 #if 0 1399 mb = m; 1400 bpos = mtod(caddr_t, mb) + mb->m_len; 1401 #endif 1402 UIO_ADVANCE(uiop, len); 1403 uiop->uio_offset += len; 1404 s = splvm(); 1405 simple_lock(&ctx.nwc_slock); 1406 ctx.nwc_mbufcount++; 1407 simple_unlock(&ctx.nwc_slock); 1408 splx(s); 1409 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1410 } else { 1411 nfsm_uiotom(uiop, len); 1412 } 1413 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1414 #ifndef NFS_V2_ONLY 1415 if (v3) { 1416 wccflag = NFSV3_WCCCHK; 1417 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1418 if (!error) { 1419 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1420 + NFSX_V3WRITEVERF); 1421 rlen = fxdr_unsigned(int, *tl++); 1422 if (rlen == 0) { 1423 error = NFSERR_IO; 1424 m_freem(mrep); 1425 break; 1426 } else if (rlen < len) { 1427 backup = len - rlen; 1428 UIO_ADVANCE(uiop, -backup); 1429 uiop->uio_offset -= backup; 1430 len = rlen; 1431 } 1432 commit = fxdr_unsigned(int, *tl++); 1433 1434 /* 1435 * Return the lowest committment level 1436 * obtained by any of the RPCs. 1437 */ 1438 if (committed == NFSV3WRITE_FILESYNC) 1439 committed = commit; 1440 else if (committed == NFSV3WRITE_DATASYNC && 1441 commit == NFSV3WRITE_UNSTABLE) 1442 committed = commit; 1443 simple_lock(&nmp->nm_slock); 1444 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1445 memcpy(nmp->nm_writeverf, tl, 1446 NFSX_V3WRITEVERF); 1447 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1448 } else if ((nmp->nm_iflag & 1449 NFSMNT_STALEWRITEVERF) || 1450 memcmp(tl, nmp->nm_writeverf, 1451 NFSX_V3WRITEVERF)) { 1452 memcpy(nmp->nm_writeverf, tl, 1453 NFSX_V3WRITEVERF); 1454 /* 1455 * note NFSMNT_STALEWRITEVERF 1456 * if we're the first thread to 1457 * notice it. 1458 */ 1459 if ((nmp->nm_iflag & 1460 NFSMNT_STALEWRITEVERF) == 0) { 1461 stalewriteverf = TRUE; 1462 nmp->nm_iflag |= 1463 NFSMNT_STALEWRITEVERF; 1464 } 1465 } 1466 simple_unlock(&nmp->nm_slock); 1467 } 1468 } else 1469 #endif 1470 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1471 if (wccflag) 1472 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1473 m_freem(mrep); 1474 if (error) 1475 break; 1476 tsiz -= len; 1477 byte_count += len; 1478 if (stalewriteverf) { 1479 *stalewriteverfp = TRUE; 1480 stalewriteverf = FALSE; 1481 if (committed == NFSV3WRITE_UNSTABLE && 1482 len != origresid) { 1483 /* 1484 * if our write requests weren't atomic but 1485 * unstable, datas in previous iterations 1486 * might have already been lost now. 1487 * then, we should resend them to nfsd. 1488 */ 1489 backup = origresid - tsiz; 1490 UIO_ADVANCE(uiop, -backup); 1491 uiop->uio_offset -= backup; 1492 tsiz = origresid; 1493 goto retry; 1494 } 1495 } 1496 } 1497 nfsmout: 1498 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1499 if (pageprotected) { 1500 /* 1501 * wait until mbufs go away. 1502 * retransmitted mbufs can survive longer than rpc requests 1503 * themselves. 1504 */ 1505 s = splvm(); 1506 simple_lock(&ctx.nwc_slock); 1507 ctx.nwc_mbufcount--; 1508 while (ctx.nwc_mbufcount > 0) { 1509 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1510 } 1511 simple_unlock(&ctx.nwc_slock); 1512 splx(s); 1513 PRELE(l); 1514 } 1515 *iomode = committed; 1516 if (error) 1517 uiop->uio_resid = tsiz; 1518 return (error); 1519 } 1520 1521 /* 1522 * nfs mknod rpc 1523 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1524 * mode set to specify the file type and the size field for rdev. 1525 */ 1526 int 1527 nfs_mknodrpc(dvp, vpp, cnp, vap) 1528 struct vnode *dvp; 1529 struct vnode **vpp; 1530 struct componentname *cnp; 1531 struct vattr *vap; 1532 { 1533 struct nfsv2_sattr *sp; 1534 u_int32_t *tl; 1535 caddr_t cp; 1536 int32_t t1, t2; 1537 struct vnode *newvp = (struct vnode *)0; 1538 struct nfsnode *dnp, *np; 1539 char *cp2; 1540 caddr_t bpos, dpos; 1541 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1542 struct mbuf *mreq, *mrep, *md, *mb; 1543 u_int32_t rdev; 1544 const int v3 = NFS_ISV3(dvp); 1545 1546 if (vap->va_type == VCHR || vap->va_type == VBLK) 1547 rdev = txdr_unsigned(vap->va_rdev); 1548 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1549 rdev = nfs_xdrneg1; 1550 else { 1551 VOP_ABORTOP(dvp, cnp); 1552 vput(dvp); 1553 return (EOPNOTSUPP); 1554 } 1555 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1556 dnp = VTONFS(dvp); 1557 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1558 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1559 nfsm_fhtom(dnp, v3); 1560 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1561 #ifndef NFS_V2_ONLY 1562 if (v3) { 1563 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1564 *tl++ = vtonfsv3_type(vap->va_type); 1565 nfsm_v3attrbuild(vap, FALSE); 1566 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1567 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1568 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1569 *tl = txdr_unsigned(minor(vap->va_rdev)); 1570 } 1571 } else 1572 #endif 1573 { 1574 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1575 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1576 sp->sa_uid = nfs_xdrneg1; 1577 sp->sa_gid = nfs_xdrneg1; 1578 sp->sa_size = rdev; 1579 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1580 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1581 } 1582 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_lwp, cnp->cn_cred); 1583 if (!error) { 1584 nfsm_mtofh(dvp, newvp, v3, gotvp); 1585 if (!gotvp) { 1586 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1587 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1588 if (!error) 1589 newvp = NFSTOV(np); 1590 } 1591 } 1592 #ifndef NFS_V2_ONLY 1593 if (v3) 1594 nfsm_wcc_data(dvp, wccflag, 0, !error); 1595 #endif 1596 nfsm_reqdone; 1597 if (error) { 1598 if (newvp) 1599 vput(newvp); 1600 } else { 1601 if (cnp->cn_flags & MAKEENTRY) 1602 nfs_cache_enter(dvp, newvp, cnp); 1603 *vpp = newvp; 1604 } 1605 PNBUF_PUT(cnp->cn_pnbuf); 1606 VTONFS(dvp)->n_flag |= NMODIFIED; 1607 if (!wccflag) 1608 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1609 vput(dvp); 1610 return (error); 1611 } 1612 1613 /* 1614 * nfs mknod vop 1615 * just call nfs_mknodrpc() to do the work. 1616 */ 1617 /* ARGSUSED */ 1618 int 1619 nfs_mknod(v) 1620 void *v; 1621 { 1622 struct vop_mknod_args /* { 1623 struct vnode *a_dvp; 1624 struct vnode **a_vpp; 1625 struct componentname *a_cnp; 1626 struct vattr *a_vap; 1627 } */ *ap = v; 1628 struct vnode *dvp = ap->a_dvp; 1629 struct componentname *cnp = ap->a_cnp; 1630 int error; 1631 1632 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1633 VN_KNOTE(dvp, NOTE_WRITE); 1634 if (error == 0 || error == EEXIST) 1635 cache_purge1(dvp, cnp, 0); 1636 return (error); 1637 } 1638 1639 #ifndef NFS_V2_ONLY 1640 static u_long create_verf; 1641 #endif 1642 /* 1643 * nfs file create call 1644 */ 1645 int 1646 nfs_create(v) 1647 void *v; 1648 { 1649 struct vop_create_args /* { 1650 struct vnode *a_dvp; 1651 struct vnode **a_vpp; 1652 struct componentname *a_cnp; 1653 struct vattr *a_vap; 1654 } */ *ap = v; 1655 struct vnode *dvp = ap->a_dvp; 1656 struct vattr *vap = ap->a_vap; 1657 struct componentname *cnp = ap->a_cnp; 1658 struct nfsv2_sattr *sp; 1659 u_int32_t *tl; 1660 caddr_t cp; 1661 int32_t t1, t2; 1662 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1663 struct vnode *newvp = (struct vnode *)0; 1664 caddr_t bpos, dpos, cp2; 1665 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1666 struct mbuf *mreq, *mrep, *md, *mb; 1667 const int v3 = NFS_ISV3(dvp); 1668 1669 /* 1670 * Oops, not for me.. 1671 */ 1672 if (vap->va_type == VSOCK) 1673 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1674 1675 KASSERT(vap->va_type == VREG); 1676 1677 #ifdef VA_EXCLUSIVE 1678 if (vap->va_vaflags & VA_EXCLUSIVE) 1679 fmode |= O_EXCL; 1680 #endif 1681 again: 1682 error = 0; 1683 nfsstats.rpccnt[NFSPROC_CREATE]++; 1684 dnp = VTONFS(dvp); 1685 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1686 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1687 nfsm_fhtom(dnp, v3); 1688 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1689 #ifndef NFS_V2_ONLY 1690 if (v3) { 1691 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1692 if (fmode & O_EXCL) { 1693 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1694 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1695 #ifdef INET 1696 if (TAILQ_FIRST(&in_ifaddrhead)) 1697 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1698 ia_addr.sin_addr.s_addr; 1699 else 1700 *tl++ = create_verf; 1701 #else 1702 *tl++ = create_verf; 1703 #endif 1704 *tl = ++create_verf; 1705 } else { 1706 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1707 nfsm_v3attrbuild(vap, FALSE); 1708 } 1709 } else 1710 #endif 1711 { 1712 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1713 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1714 sp->sa_uid = nfs_xdrneg1; 1715 sp->sa_gid = nfs_xdrneg1; 1716 sp->sa_size = 0; 1717 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1718 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1719 } 1720 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_lwp, cnp->cn_cred); 1721 if (!error) { 1722 nfsm_mtofh(dvp, newvp, v3, gotvp); 1723 if (!gotvp) { 1724 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1725 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1726 if (!error) 1727 newvp = NFSTOV(np); 1728 } 1729 } 1730 #ifndef NFS_V2_ONLY 1731 if (v3) 1732 nfsm_wcc_data(dvp, wccflag, 0, !error); 1733 #endif 1734 nfsm_reqdone; 1735 if (error) { 1736 /* 1737 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 1738 */ 1739 if (v3 && (fmode & O_EXCL) && error == ENOTSUP) { 1740 fmode &= ~O_EXCL; 1741 goto again; 1742 } 1743 } else if (v3 && (fmode & O_EXCL)) { 1744 struct timespec ts; 1745 1746 getnanotime(&ts); 1747 1748 /* 1749 * make sure that we'll update timestamps as 1750 * most server implementations use them to store 1751 * the create verifier. 1752 * 1753 * XXX it's better to use TOSERVER always. 1754 */ 1755 1756 if (vap->va_atime.tv_sec == VNOVAL) 1757 vap->va_atime = ts; 1758 if (vap->va_mtime.tv_sec == VNOVAL) 1759 vap->va_mtime = ts; 1760 1761 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_lwp); 1762 } 1763 if (error == 0) { 1764 if (cnp->cn_flags & MAKEENTRY) 1765 nfs_cache_enter(dvp, newvp, cnp); 1766 else 1767 cache_purge1(dvp, cnp, 0); 1768 *ap->a_vpp = newvp; 1769 } else { 1770 if (newvp) 1771 vput(newvp); 1772 if (error == EEXIST) 1773 cache_purge1(dvp, cnp, 0); 1774 } 1775 PNBUF_PUT(cnp->cn_pnbuf); 1776 VTONFS(dvp)->n_flag |= NMODIFIED; 1777 if (!wccflag) 1778 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1779 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1780 vput(dvp); 1781 return (error); 1782 } 1783 1784 /* 1785 * nfs file remove call 1786 * To try and make nfs semantics closer to ufs semantics, a file that has 1787 * other processes using the vnode is renamed instead of removed and then 1788 * removed later on the last close. 1789 * - If v_usecount > 1 1790 * If a rename is not already in the works 1791 * call nfs_sillyrename() to set it up 1792 * else 1793 * do the remove rpc 1794 */ 1795 int 1796 nfs_remove(v) 1797 void *v; 1798 { 1799 struct vop_remove_args /* { 1800 struct vnodeop_desc *a_desc; 1801 struct vnode * a_dvp; 1802 struct vnode * a_vp; 1803 struct componentname * a_cnp; 1804 } */ *ap = v; 1805 struct vnode *vp = ap->a_vp; 1806 struct vnode *dvp = ap->a_dvp; 1807 struct componentname *cnp = ap->a_cnp; 1808 struct nfsnode *np = VTONFS(vp); 1809 int error = 0; 1810 struct vattr vattr; 1811 1812 #ifndef DIAGNOSTIC 1813 if ((cnp->cn_flags & HASBUF) == 0) 1814 panic("nfs_remove: no name"); 1815 if (vp->v_usecount < 1) 1816 panic("nfs_remove: bad v_usecount"); 1817 #endif 1818 if (vp->v_type == VDIR) 1819 error = EPERM; 1820 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1821 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_lwp) == 0 && 1822 vattr.va_nlink > 1)) { 1823 /* 1824 * Purge the name cache so that the chance of a lookup for 1825 * the name succeeding while the remove is in progress is 1826 * minimized. Without node locking it can still happen, such 1827 * that an I/O op returns ESTALE, but since you get this if 1828 * another host removes the file.. 1829 */ 1830 cache_purge(vp); 1831 /* 1832 * throw away biocache buffers, mainly to avoid 1833 * unnecessary delayed writes later. 1834 */ 1835 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_lwp, 1); 1836 /* Do the rpc */ 1837 if (error != EINTR) 1838 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1839 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp); 1840 } else if (!np->n_sillyrename) 1841 error = nfs_sillyrename(dvp, vp, cnp, FALSE); 1842 PNBUF_PUT(cnp->cn_pnbuf); 1843 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1844 vattr.va_nlink == 1) { 1845 np->n_flag |= NREMOVED; 1846 } 1847 NFS_INVALIDATE_ATTRCACHE(np); 1848 VN_KNOTE(vp, NOTE_DELETE); 1849 VN_KNOTE(dvp, NOTE_WRITE); 1850 if (dvp == vp) 1851 vrele(vp); 1852 else 1853 vput(vp); 1854 vput(dvp); 1855 return (error); 1856 } 1857 1858 /* 1859 * nfs file remove rpc called from nfs_inactive 1860 */ 1861 int 1862 nfs_removeit(sp) 1863 struct sillyrename *sp; 1864 { 1865 1866 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1867 (struct lwp *)0)); 1868 } 1869 1870 /* 1871 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1872 */ 1873 int 1874 nfs_removerpc(dvp, name, namelen, cred, l) 1875 struct vnode *dvp; 1876 const char *name; 1877 int namelen; 1878 kauth_cred_t cred; 1879 struct lwp *l; 1880 { 1881 u_int32_t *tl; 1882 caddr_t cp; 1883 #ifndef NFS_V2_ONLY 1884 int32_t t1; 1885 caddr_t cp2; 1886 #endif 1887 int32_t t2; 1888 caddr_t bpos, dpos; 1889 int error = 0, wccflag = NFSV3_WCCRATTR; 1890 struct mbuf *mreq, *mrep, *md, *mb; 1891 const int v3 = NFS_ISV3(dvp); 1892 int rexmit = 0; 1893 struct nfsnode *dnp = VTONFS(dvp); 1894 1895 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1896 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1897 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1898 nfsm_fhtom(dnp, v3); 1899 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1900 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1901 #ifndef NFS_V2_ONLY 1902 if (v3) 1903 nfsm_wcc_data(dvp, wccflag, 0, !error); 1904 #endif 1905 nfsm_reqdone; 1906 VTONFS(dvp)->n_flag |= NMODIFIED; 1907 if (!wccflag) 1908 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1909 /* 1910 * Kludge City: If the first reply to the remove rpc is lost.. 1911 * the reply to the retransmitted request will be ENOENT 1912 * since the file was in fact removed 1913 * Therefore, we cheat and return success. 1914 */ 1915 if (rexmit && error == ENOENT) 1916 error = 0; 1917 return (error); 1918 } 1919 1920 /* 1921 * nfs file rename call 1922 */ 1923 int 1924 nfs_rename(v) 1925 void *v; 1926 { 1927 struct vop_rename_args /* { 1928 struct vnode *a_fdvp; 1929 struct vnode *a_fvp; 1930 struct componentname *a_fcnp; 1931 struct vnode *a_tdvp; 1932 struct vnode *a_tvp; 1933 struct componentname *a_tcnp; 1934 } */ *ap = v; 1935 struct vnode *fvp = ap->a_fvp; 1936 struct vnode *tvp = ap->a_tvp; 1937 struct vnode *fdvp = ap->a_fdvp; 1938 struct vnode *tdvp = ap->a_tdvp; 1939 struct componentname *tcnp = ap->a_tcnp; 1940 struct componentname *fcnp = ap->a_fcnp; 1941 int error; 1942 1943 #ifndef DIAGNOSTIC 1944 if ((tcnp->cn_flags & HASBUF) == 0 || 1945 (fcnp->cn_flags & HASBUF) == 0) 1946 panic("nfs_rename: no name"); 1947 #endif 1948 /* Check for cross-device rename */ 1949 if ((fvp->v_mount != tdvp->v_mount) || 1950 (tvp && (fvp->v_mount != tvp->v_mount))) { 1951 error = EXDEV; 1952 goto out; 1953 } 1954 1955 /* 1956 * If the tvp exists and is in use, sillyrename it before doing the 1957 * rename of the new file over it. 1958 * 1959 * Have sillyrename use link instead of rename if possible, 1960 * so that we don't lose the file if the rename fails, and so 1961 * that there's no window when the "to" file doesn't exist. 1962 */ 1963 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1964 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, TRUE)) { 1965 VN_KNOTE(tvp, NOTE_DELETE); 1966 vput(tvp); 1967 tvp = NULL; 1968 } 1969 1970 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1971 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1972 tcnp->cn_lwp); 1973 1974 VN_KNOTE(fdvp, NOTE_WRITE); 1975 VN_KNOTE(tdvp, NOTE_WRITE); 1976 if (error == 0 || error == EEXIST) { 1977 if (fvp->v_type == VDIR) 1978 cache_purge(fvp); 1979 else 1980 cache_purge1(fdvp, fcnp, 0); 1981 if (tvp != NULL && tvp->v_type == VDIR) 1982 cache_purge(tvp); 1983 else 1984 cache_purge1(tdvp, tcnp, 0); 1985 } 1986 out: 1987 if (tdvp == tvp) 1988 vrele(tdvp); 1989 else 1990 vput(tdvp); 1991 if (tvp) 1992 vput(tvp); 1993 vrele(fdvp); 1994 vrele(fvp); 1995 return (error); 1996 } 1997 1998 /* 1999 * nfs file rename rpc called from nfs_remove() above 2000 */ 2001 int 2002 nfs_renameit(sdvp, scnp, sp) 2003 struct vnode *sdvp; 2004 struct componentname *scnp; 2005 struct sillyrename *sp; 2006 { 2007 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2008 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_lwp)); 2009 } 2010 2011 /* 2012 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2013 */ 2014 int 2015 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2016 struct vnode *fdvp; 2017 const char *fnameptr; 2018 int fnamelen; 2019 struct vnode *tdvp; 2020 const char *tnameptr; 2021 int tnamelen; 2022 kauth_cred_t cred; 2023 struct lwp *l; 2024 { 2025 u_int32_t *tl; 2026 caddr_t cp; 2027 #ifndef NFS_V2_ONLY 2028 int32_t t1; 2029 caddr_t cp2; 2030 #endif 2031 int32_t t2; 2032 caddr_t bpos, dpos; 2033 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2034 struct mbuf *mreq, *mrep, *md, *mb; 2035 const int v3 = NFS_ISV3(fdvp); 2036 int rexmit = 0; 2037 struct nfsnode *fdnp = VTONFS(fdvp); 2038 2039 nfsstats.rpccnt[NFSPROC_RENAME]++; 2040 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2041 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2042 nfsm_rndup(tnamelen)); 2043 nfsm_fhtom(fdnp, v3); 2044 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2045 nfsm_fhtom(VTONFS(tdvp), v3); 2046 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2047 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2048 #ifndef NFS_V2_ONLY 2049 if (v3) { 2050 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2051 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2052 } 2053 #endif 2054 nfsm_reqdone; 2055 VTONFS(fdvp)->n_flag |= NMODIFIED; 2056 VTONFS(tdvp)->n_flag |= NMODIFIED; 2057 if (!fwccflag) 2058 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2059 if (!twccflag) 2060 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2061 /* 2062 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2063 */ 2064 if (rexmit && error == ENOENT) 2065 error = 0; 2066 return (error); 2067 } 2068 2069 /* 2070 * NFS link RPC, called from nfs_link. 2071 * Assumes dvp and vp locked, and leaves them that way. 2072 */ 2073 2074 static int 2075 nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, 2076 size_t namelen, kauth_cred_t cred, struct lwp *l) 2077 { 2078 u_int32_t *tl; 2079 caddr_t cp; 2080 #ifndef NFS_V2_ONLY 2081 int32_t t1; 2082 caddr_t cp2; 2083 #endif 2084 int32_t t2; 2085 caddr_t bpos, dpos; 2086 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2087 struct mbuf *mreq, *mrep, *md, *mb; 2088 const int v3 = NFS_ISV3(dvp); 2089 int rexmit = 0; 2090 struct nfsnode *np = VTONFS(vp); 2091 2092 nfsstats.rpccnt[NFSPROC_LINK]++; 2093 nfsm_reqhead(np, NFSPROC_LINK, 2094 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); 2095 nfsm_fhtom(np, v3); 2096 nfsm_fhtom(VTONFS(dvp), v3); 2097 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 2098 nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); 2099 #ifndef NFS_V2_ONLY 2100 if (v3) { 2101 nfsm_postop_attr(vp, attrflag, 0); 2102 nfsm_wcc_data(dvp, wccflag, 0, !error); 2103 } 2104 #endif 2105 nfsm_reqdone; 2106 2107 VTONFS(dvp)->n_flag |= NMODIFIED; 2108 if (!attrflag) 2109 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2110 if (!wccflag) 2111 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2112 2113 /* 2114 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2115 */ 2116 if (rexmit && error == EEXIST) 2117 error = 0; 2118 2119 return error; 2120 } 2121 2122 /* 2123 * nfs hard link create call 2124 */ 2125 int 2126 nfs_link(v) 2127 void *v; 2128 { 2129 struct vop_link_args /* { 2130 struct vnode *a_dvp; 2131 struct vnode *a_vp; 2132 struct componentname *a_cnp; 2133 } */ *ap = v; 2134 struct vnode *vp = ap->a_vp; 2135 struct vnode *dvp = ap->a_dvp; 2136 struct componentname *cnp = ap->a_cnp; 2137 int error = 0; 2138 2139 if (dvp->v_mount != vp->v_mount) { 2140 VOP_ABORTOP(dvp, cnp); 2141 vput(dvp); 2142 return (EXDEV); 2143 } 2144 if (dvp != vp) { 2145 error = vn_lock(vp, LK_EXCLUSIVE); 2146 if (error != 0) { 2147 VOP_ABORTOP(dvp, cnp); 2148 vput(dvp); 2149 return error; 2150 } 2151 } 2152 2153 /* 2154 * Push all writes to the server, so that the attribute cache 2155 * doesn't get "out of sync" with the server. 2156 * XXX There should be a better way! 2157 */ 2158 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_lwp); 2159 2160 error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2161 cnp->cn_cred, cnp->cn_lwp); 2162 2163 if (error == 0) 2164 cache_purge1(dvp, cnp, 0); 2165 PNBUF_PUT(cnp->cn_pnbuf); 2166 if (dvp != vp) 2167 VOP_UNLOCK(vp, 0); 2168 VN_KNOTE(vp, NOTE_LINK); 2169 VN_KNOTE(dvp, NOTE_WRITE); 2170 vput(dvp); 2171 return (error); 2172 } 2173 2174 /* 2175 * nfs symbolic link create call 2176 */ 2177 int 2178 nfs_symlink(v) 2179 void *v; 2180 { 2181 struct vop_symlink_args /* { 2182 struct vnode *a_dvp; 2183 struct vnode **a_vpp; 2184 struct componentname *a_cnp; 2185 struct vattr *a_vap; 2186 char *a_target; 2187 } */ *ap = v; 2188 struct vnode *dvp = ap->a_dvp; 2189 struct vattr *vap = ap->a_vap; 2190 struct componentname *cnp = ap->a_cnp; 2191 struct nfsv2_sattr *sp; 2192 u_int32_t *tl; 2193 caddr_t cp; 2194 int32_t t1, t2; 2195 caddr_t bpos, dpos, cp2; 2196 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2197 struct mbuf *mreq, *mrep, *md, *mb; 2198 struct vnode *newvp = (struct vnode *)0; 2199 const int v3 = NFS_ISV3(dvp); 2200 int rexmit = 0; 2201 struct nfsnode *dnp = VTONFS(dvp); 2202 2203 *ap->a_vpp = NULL; 2204 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2205 slen = strlen(ap->a_target); 2206 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2207 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2208 nfsm_fhtom(dnp, v3); 2209 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2210 #ifndef NFS_V2_ONlY 2211 if (v3) 2212 nfsm_v3attrbuild(vap, FALSE); 2213 #endif 2214 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2215 #ifndef NFS_V2_ONlY 2216 if (!v3) { 2217 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2218 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2219 sp->sa_uid = nfs_xdrneg1; 2220 sp->sa_gid = nfs_xdrneg1; 2221 sp->sa_size = nfs_xdrneg1; 2222 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2223 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2224 } 2225 #endif 2226 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_lwp, cnp->cn_cred, 2227 &rexmit); 2228 #ifndef NFS_V2_ONlY 2229 if (v3) { 2230 if (!error) 2231 nfsm_mtofh(dvp, newvp, v3, gotvp); 2232 nfsm_wcc_data(dvp, wccflag, 0, !error); 2233 } 2234 #endif 2235 nfsm_reqdone; 2236 /* 2237 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2238 */ 2239 if (rexmit && error == EEXIST) 2240 error = 0; 2241 if (error == 0 || error == EEXIST) 2242 cache_purge1(dvp, cnp, 0); 2243 if (error == 0 && newvp == NULL) { 2244 struct nfsnode *np = NULL; 2245 2246 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2247 cnp->cn_cred, cnp->cn_lwp, &np); 2248 if (error == 0) 2249 newvp = NFSTOV(np); 2250 } 2251 if (error) { 2252 if (newvp != NULL) 2253 vput(newvp); 2254 } else { 2255 *ap->a_vpp = newvp; 2256 } 2257 PNBUF_PUT(cnp->cn_pnbuf); 2258 VTONFS(dvp)->n_flag |= NMODIFIED; 2259 if (!wccflag) 2260 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2261 VN_KNOTE(dvp, NOTE_WRITE); 2262 vput(dvp); 2263 return (error); 2264 } 2265 2266 /* 2267 * nfs make dir call 2268 */ 2269 int 2270 nfs_mkdir(v) 2271 void *v; 2272 { 2273 struct vop_mkdir_args /* { 2274 struct vnode *a_dvp; 2275 struct vnode **a_vpp; 2276 struct componentname *a_cnp; 2277 struct vattr *a_vap; 2278 } */ *ap = v; 2279 struct vnode *dvp = ap->a_dvp; 2280 struct vattr *vap = ap->a_vap; 2281 struct componentname *cnp = ap->a_cnp; 2282 struct nfsv2_sattr *sp; 2283 u_int32_t *tl; 2284 caddr_t cp; 2285 int32_t t1, t2; 2286 int len; 2287 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2288 struct vnode *newvp = (struct vnode *)0; 2289 caddr_t bpos, dpos, cp2; 2290 int error = 0, wccflag = NFSV3_WCCRATTR; 2291 int gotvp = 0; 2292 int rexmit = 0; 2293 struct mbuf *mreq, *mrep, *md, *mb; 2294 const int v3 = NFS_ISV3(dvp); 2295 2296 len = cnp->cn_namelen; 2297 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2298 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2299 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2300 nfsm_fhtom(dnp, v3); 2301 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2302 #ifndef NFS_V2_ONLY 2303 if (v3) { 2304 nfsm_v3attrbuild(vap, FALSE); 2305 } else 2306 #endif 2307 { 2308 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2309 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2310 sp->sa_uid = nfs_xdrneg1; 2311 sp->sa_gid = nfs_xdrneg1; 2312 sp->sa_size = nfs_xdrneg1; 2313 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2314 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2315 } 2316 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2317 if (!error) 2318 nfsm_mtofh(dvp, newvp, v3, gotvp); 2319 if (v3) 2320 nfsm_wcc_data(dvp, wccflag, 0, !error); 2321 nfsm_reqdone; 2322 VTONFS(dvp)->n_flag |= NMODIFIED; 2323 if (!wccflag) 2324 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2325 /* 2326 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2327 * if we can succeed in looking up the directory. 2328 */ 2329 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2330 if (newvp) { 2331 vput(newvp); 2332 newvp = (struct vnode *)0; 2333 } 2334 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2335 cnp->cn_lwp, &np); 2336 if (!error) { 2337 newvp = NFSTOV(np); 2338 if (newvp->v_type != VDIR || newvp == dvp) 2339 error = EEXIST; 2340 } 2341 } 2342 if (error) { 2343 if (newvp) { 2344 if (dvp != newvp) 2345 vput(newvp); 2346 else 2347 vrele(newvp); 2348 } 2349 } else { 2350 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2351 if (cnp->cn_flags & MAKEENTRY) 2352 nfs_cache_enter(dvp, newvp, cnp); 2353 *ap->a_vpp = newvp; 2354 } 2355 PNBUF_PUT(cnp->cn_pnbuf); 2356 vput(dvp); 2357 return (error); 2358 } 2359 2360 /* 2361 * nfs remove directory call 2362 */ 2363 int 2364 nfs_rmdir(v) 2365 void *v; 2366 { 2367 struct vop_rmdir_args /* { 2368 struct vnode *a_dvp; 2369 struct vnode *a_vp; 2370 struct componentname *a_cnp; 2371 } */ *ap = v; 2372 struct vnode *vp = ap->a_vp; 2373 struct vnode *dvp = ap->a_dvp; 2374 struct componentname *cnp = ap->a_cnp; 2375 u_int32_t *tl; 2376 caddr_t cp; 2377 #ifndef NFS_V2_ONLY 2378 int32_t t1; 2379 caddr_t cp2; 2380 #endif 2381 int32_t t2; 2382 caddr_t bpos, dpos; 2383 int error = 0, wccflag = NFSV3_WCCRATTR; 2384 int rexmit = 0; 2385 struct mbuf *mreq, *mrep, *md, *mb; 2386 const int v3 = NFS_ISV3(dvp); 2387 struct nfsnode *dnp; 2388 2389 if (dvp == vp) { 2390 vrele(dvp); 2391 vput(dvp); 2392 PNBUF_PUT(cnp->cn_pnbuf); 2393 return (EINVAL); 2394 } 2395 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2396 dnp = VTONFS(dvp); 2397 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2398 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2399 nfsm_fhtom(dnp, v3); 2400 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2401 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2402 #ifndef NFS_V2_ONLY 2403 if (v3) 2404 nfsm_wcc_data(dvp, wccflag, 0, !error); 2405 #endif 2406 nfsm_reqdone; 2407 PNBUF_PUT(cnp->cn_pnbuf); 2408 VTONFS(dvp)->n_flag |= NMODIFIED; 2409 if (!wccflag) 2410 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2411 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2412 VN_KNOTE(vp, NOTE_DELETE); 2413 cache_purge(vp); 2414 vput(vp); 2415 vput(dvp); 2416 /* 2417 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2418 */ 2419 if (rexmit && error == ENOENT) 2420 error = 0; 2421 return (error); 2422 } 2423 2424 /* 2425 * nfs readdir call 2426 */ 2427 int 2428 nfs_readdir(v) 2429 void *v; 2430 { 2431 struct vop_readdir_args /* { 2432 struct vnode *a_vp; 2433 struct uio *a_uio; 2434 kauth_cred_t a_cred; 2435 int *a_eofflag; 2436 off_t **a_cookies; 2437 int *a_ncookies; 2438 } */ *ap = v; 2439 struct vnode *vp = ap->a_vp; 2440 struct uio *uio = ap->a_uio; 2441 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2442 char *base = uio->uio_iov->iov_base; 2443 int tresid, error; 2444 size_t count, lost; 2445 struct dirent *dp; 2446 off_t *cookies = NULL; 2447 int ncookies = 0, nc; 2448 2449 if (vp->v_type != VDIR) 2450 return (EPERM); 2451 2452 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2453 count = uio->uio_resid - lost; 2454 if (count <= 0) 2455 return (EINVAL); 2456 2457 /* 2458 * Call nfs_bioread() to do the real work. 2459 */ 2460 tresid = uio->uio_resid = count; 2461 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2462 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2463 2464 if (!error && ap->a_cookies) { 2465 ncookies = count / 16; 2466 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2467 *ap->a_cookies = cookies; 2468 } 2469 2470 if (!error && uio->uio_resid == tresid) { 2471 uio->uio_resid += lost; 2472 nfsstats.direofcache_misses++; 2473 if (ap->a_cookies) 2474 *ap->a_ncookies = 0; 2475 *ap->a_eofflag = 1; 2476 return (0); 2477 } 2478 2479 if (!error && ap->a_cookies) { 2480 /* 2481 * Only the NFS server and emulations use cookies, and they 2482 * load the directory block into system space, so we can 2483 * just look at it directly. 2484 */ 2485 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2486 uio->uio_iovcnt != 1) 2487 panic("nfs_readdir: lost in space"); 2488 for (nc = 0; ncookies-- && 2489 base < (char *)uio->uio_iov->iov_base; nc++){ 2490 dp = (struct dirent *) base; 2491 if (dp->d_reclen == 0) 2492 break; 2493 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2494 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2495 else 2496 *(cookies++) = NFS_GETCOOKIE(dp); 2497 base += dp->d_reclen; 2498 } 2499 uio->uio_resid += 2500 ((caddr_t)uio->uio_iov->iov_base - base); 2501 uio->uio_iov->iov_len += 2502 ((caddr_t)uio->uio_iov->iov_base - base); 2503 uio->uio_iov->iov_base = base; 2504 *ap->a_ncookies = nc; 2505 } 2506 2507 uio->uio_resid += lost; 2508 *ap->a_eofflag = 0; 2509 return (error); 2510 } 2511 2512 /* 2513 * Readdir rpc call. 2514 * Called from below the buffer cache by nfs_doio(). 2515 */ 2516 int 2517 nfs_readdirrpc(vp, uiop, cred) 2518 struct vnode *vp; 2519 struct uio *uiop; 2520 kauth_cred_t cred; 2521 { 2522 int len, left; 2523 struct dirent *dp = NULL; 2524 u_int32_t *tl; 2525 caddr_t cp; 2526 int32_t t1, t2; 2527 caddr_t bpos, dpos, cp2; 2528 struct mbuf *mreq, *mrep, *md, *mb; 2529 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2530 struct nfsnode *dnp = VTONFS(vp); 2531 u_quad_t fileno; 2532 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2533 #ifndef NFS_V2_ONLY 2534 int attrflag; 2535 #endif 2536 int nrpcs = 0, reclen; 2537 const int v3 = NFS_ISV3(vp); 2538 2539 #ifdef DIAGNOSTIC 2540 /* 2541 * Should be called from buffer cache, so only amount of 2542 * NFS_DIRBLKSIZ will be requested. 2543 */ 2544 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2545 panic("nfs readdirrpc bad uio"); 2546 #endif 2547 2548 /* 2549 * Loop around doing readdir rpc's of size nm_readdirsize 2550 * truncated to a multiple of NFS_DIRFRAGSIZ. 2551 * The stopping criteria is EOF or buffer full. 2552 */ 2553 while (more_dirs && bigenough) { 2554 /* 2555 * Heuristic: don't bother to do another RPC to further 2556 * fill up this block if there is not much room left. (< 50% 2557 * of the readdir RPC size). This wastes some buffer space 2558 * but can save up to 50% in RPC calls. 2559 */ 2560 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2561 bigenough = 0; 2562 break; 2563 } 2564 nfsstats.rpccnt[NFSPROC_READDIR]++; 2565 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2566 NFSX_READDIR(v3)); 2567 nfsm_fhtom(dnp, v3); 2568 #ifndef NFS_V2_ONLY 2569 if (v3) { 2570 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2571 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2572 txdr_swapcookie3(uiop->uio_offset, tl); 2573 } else { 2574 txdr_cookie3(uiop->uio_offset, tl); 2575 } 2576 tl += 2; 2577 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2578 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2579 } else 2580 #endif 2581 { 2582 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2583 *tl++ = txdr_unsigned(uiop->uio_offset); 2584 } 2585 *tl = txdr_unsigned(nmp->nm_readdirsize); 2586 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2587 nrpcs++; 2588 #ifndef NFS_V2_ONLY 2589 if (v3) { 2590 nfsm_postop_attr(vp, attrflag, 0); 2591 if (!error) { 2592 nfsm_dissect(tl, u_int32_t *, 2593 2 * NFSX_UNSIGNED); 2594 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2595 dnp->n_cookieverf.nfsuquad[1] = *tl; 2596 } else { 2597 m_freem(mrep); 2598 goto nfsmout; 2599 } 2600 } 2601 #endif 2602 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2603 more_dirs = fxdr_unsigned(int, *tl); 2604 2605 /* loop thru the dir entries, doctoring them to 4bsd form */ 2606 while (more_dirs && bigenough) { 2607 #ifndef NFS_V2_ONLY 2608 if (v3) { 2609 nfsm_dissect(tl, u_int32_t *, 2610 3 * NFSX_UNSIGNED); 2611 fileno = fxdr_hyper(tl); 2612 len = fxdr_unsigned(int, *(tl + 2)); 2613 } else 2614 #endif 2615 { 2616 nfsm_dissect(tl, u_int32_t *, 2617 2 * NFSX_UNSIGNED); 2618 fileno = fxdr_unsigned(u_quad_t, *tl++); 2619 len = fxdr_unsigned(int, *tl); 2620 } 2621 if (len <= 0 || len > NFS_MAXNAMLEN) { 2622 error = EBADRPC; 2623 m_freem(mrep); 2624 goto nfsmout; 2625 } 2626 /* for cookie stashing */ 2627 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2628 left = NFS_DIRFRAGSIZ - blksiz; 2629 if (reclen > left) { 2630 memset(uiop->uio_iov->iov_base, 0, left); 2631 dp->d_reclen += left; 2632 UIO_ADVANCE(uiop, left); 2633 blksiz = 0; 2634 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2635 } 2636 if (reclen > uiop->uio_resid) 2637 bigenough = 0; 2638 if (bigenough) { 2639 int tlen; 2640 2641 dp = (struct dirent *)uiop->uio_iov->iov_base; 2642 dp->d_fileno = fileno; 2643 dp->d_namlen = len; 2644 dp->d_reclen = reclen; 2645 dp->d_type = DT_UNKNOWN; 2646 blksiz += reclen; 2647 if (blksiz == NFS_DIRFRAGSIZ) 2648 blksiz = 0; 2649 UIO_ADVANCE(uiop, DIRHDSIZ); 2650 nfsm_mtouio(uiop, len); 2651 tlen = reclen - (DIRHDSIZ + len); 2652 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2653 UIO_ADVANCE(uiop, tlen); 2654 } else 2655 nfsm_adv(nfsm_rndup(len)); 2656 #ifndef NFS_V2_ONLY 2657 if (v3) { 2658 nfsm_dissect(tl, u_int32_t *, 2659 3 * NFSX_UNSIGNED); 2660 } else 2661 #endif 2662 { 2663 nfsm_dissect(tl, u_int32_t *, 2664 2 * NFSX_UNSIGNED); 2665 } 2666 if (bigenough) { 2667 #ifndef NFS_V2_ONLY 2668 if (v3) { 2669 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2670 uiop->uio_offset = 2671 fxdr_swapcookie3(tl); 2672 else 2673 uiop->uio_offset = 2674 fxdr_cookie3(tl); 2675 } 2676 else 2677 #endif 2678 { 2679 uiop->uio_offset = 2680 fxdr_unsigned(off_t, *tl); 2681 } 2682 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2683 } 2684 if (v3) 2685 tl += 2; 2686 else 2687 tl++; 2688 more_dirs = fxdr_unsigned(int, *tl); 2689 } 2690 /* 2691 * If at end of rpc data, get the eof boolean 2692 */ 2693 if (!more_dirs) { 2694 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2695 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2696 2697 /* 2698 * kludge: if we got no entries, treat it as EOF. 2699 * some server sometimes send a reply without any 2700 * entries or EOF. 2701 * although it might mean the server has very long name, 2702 * we can't handle such entries anyway. 2703 */ 2704 2705 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2706 more_dirs = 0; 2707 } 2708 m_freem(mrep); 2709 } 2710 /* 2711 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2712 * by increasing d_reclen for the last record. 2713 */ 2714 if (blksiz > 0) { 2715 left = NFS_DIRFRAGSIZ - blksiz; 2716 memset(uiop->uio_iov->iov_base, 0, left); 2717 dp->d_reclen += left; 2718 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2719 UIO_ADVANCE(uiop, left); 2720 } 2721 2722 /* 2723 * We are now either at the end of the directory or have filled the 2724 * block. 2725 */ 2726 if (bigenough) { 2727 dnp->n_direofoffset = uiop->uio_offset; 2728 dnp->n_flag |= NEOFVALID; 2729 } 2730 nfsmout: 2731 return (error); 2732 } 2733 2734 #ifndef NFS_V2_ONLY 2735 /* 2736 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2737 */ 2738 int 2739 nfs_readdirplusrpc(vp, uiop, cred) 2740 struct vnode *vp; 2741 struct uio *uiop; 2742 kauth_cred_t cred; 2743 { 2744 int len, left; 2745 struct dirent *dp = NULL; 2746 u_int32_t *tl; 2747 caddr_t cp; 2748 int32_t t1, t2; 2749 struct vnode *newvp; 2750 caddr_t bpos, dpos, cp2; 2751 struct mbuf *mreq, *mrep, *md, *mb; 2752 struct nameidata nami, *ndp = &nami; 2753 struct componentname *cnp = &ndp->ni_cnd; 2754 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2755 struct nfsnode *dnp = VTONFS(vp), *np; 2756 nfsfh_t *fhp; 2757 u_quad_t fileno; 2758 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2759 int attrflag, fhsize, nrpcs = 0, reclen; 2760 struct nfs_fattr fattr, *fp; 2761 2762 #ifdef DIAGNOSTIC 2763 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2764 panic("nfs readdirplusrpc bad uio"); 2765 #endif 2766 ndp->ni_dvp = vp; 2767 newvp = NULLVP; 2768 2769 /* 2770 * Loop around doing readdir rpc's of size nm_readdirsize 2771 * truncated to a multiple of NFS_DIRFRAGSIZ. 2772 * The stopping criteria is EOF or buffer full. 2773 */ 2774 while (more_dirs && bigenough) { 2775 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2776 bigenough = 0; 2777 break; 2778 } 2779 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2780 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2781 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2782 nfsm_fhtom(dnp, 1); 2783 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2784 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2785 txdr_swapcookie3(uiop->uio_offset, tl); 2786 } else { 2787 txdr_cookie3(uiop->uio_offset, tl); 2788 } 2789 tl += 2; 2790 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2791 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2792 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2793 *tl = txdr_unsigned(nmp->nm_rsize); 2794 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2795 nfsm_postop_attr(vp, attrflag, 0); 2796 if (error) { 2797 m_freem(mrep); 2798 goto nfsmout; 2799 } 2800 nrpcs++; 2801 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2802 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2803 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2804 more_dirs = fxdr_unsigned(int, *tl); 2805 2806 /* loop thru the dir entries, doctoring them to 4bsd form */ 2807 while (more_dirs && bigenough) { 2808 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2809 fileno = fxdr_hyper(tl); 2810 len = fxdr_unsigned(int, *(tl + 2)); 2811 if (len <= 0 || len > NFS_MAXNAMLEN) { 2812 error = EBADRPC; 2813 m_freem(mrep); 2814 goto nfsmout; 2815 } 2816 /* for cookie stashing */ 2817 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2818 left = NFS_DIRFRAGSIZ - blksiz; 2819 if (reclen > left) { 2820 /* 2821 * DIRFRAGSIZ is aligned, no need to align 2822 * again here. 2823 */ 2824 memset(uiop->uio_iov->iov_base, 0, left); 2825 dp->d_reclen += left; 2826 UIO_ADVANCE(uiop, left); 2827 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2828 blksiz = 0; 2829 } 2830 if (reclen > uiop->uio_resid) 2831 bigenough = 0; 2832 if (bigenough) { 2833 int tlen; 2834 2835 dp = (struct dirent *)uiop->uio_iov->iov_base; 2836 dp->d_fileno = fileno; 2837 dp->d_namlen = len; 2838 dp->d_reclen = reclen; 2839 dp->d_type = DT_UNKNOWN; 2840 blksiz += reclen; 2841 if (blksiz == NFS_DIRFRAGSIZ) 2842 blksiz = 0; 2843 UIO_ADVANCE(uiop, DIRHDSIZ); 2844 nfsm_mtouio(uiop, len); 2845 tlen = reclen - (DIRHDSIZ + len); 2846 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2847 UIO_ADVANCE(uiop, tlen); 2848 cnp->cn_nameptr = dp->d_name; 2849 cnp->cn_namelen = dp->d_namlen; 2850 } else 2851 nfsm_adv(nfsm_rndup(len)); 2852 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2853 if (bigenough) { 2854 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2855 uiop->uio_offset = 2856 fxdr_swapcookie3(tl); 2857 else 2858 uiop->uio_offset = 2859 fxdr_cookie3(tl); 2860 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2861 } 2862 tl += 2; 2863 2864 /* 2865 * Since the attributes are before the file handle 2866 * (sigh), we must skip over the attributes and then 2867 * come back and get them. 2868 */ 2869 attrflag = fxdr_unsigned(int, *tl); 2870 if (attrflag) { 2871 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2872 memcpy(&fattr, fp, NFSX_V3FATTR); 2873 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2874 doit = fxdr_unsigned(int, *tl); 2875 if (doit) { 2876 nfsm_getfh(fhp, fhsize, 1); 2877 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2878 VREF(vp); 2879 newvp = vp; 2880 np = dnp; 2881 } else { 2882 error = nfs_nget1(vp->v_mount, fhp, 2883 fhsize, &np, LK_NOWAIT); 2884 if (!error) 2885 newvp = NFSTOV(np); 2886 } 2887 if (!error) { 2888 const char *xcp; 2889 2890 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2891 if (bigenough) { 2892 dp->d_type = 2893 IFTODT(VTTOIF(np->n_vattr->va_type)); 2894 if (cnp->cn_namelen <= NCHNAMLEN) { 2895 ndp->ni_vp = newvp; 2896 xcp = cnp->cn_nameptr + 2897 cnp->cn_namelen; 2898 cnp->cn_hash = 2899 namei_hash(cnp->cn_nameptr, &xcp); 2900 nfs_cache_enter(ndp->ni_dvp, 2901 ndp->ni_vp, cnp); 2902 } 2903 } 2904 } 2905 error = 0; 2906 } 2907 } else { 2908 /* Just skip over the file handle */ 2909 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2910 i = fxdr_unsigned(int, *tl); 2911 nfsm_adv(nfsm_rndup(i)); 2912 } 2913 if (newvp != NULLVP) { 2914 if (newvp == vp) 2915 vrele(newvp); 2916 else 2917 vput(newvp); 2918 newvp = NULLVP; 2919 } 2920 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2921 more_dirs = fxdr_unsigned(int, *tl); 2922 } 2923 /* 2924 * If at end of rpc data, get the eof boolean 2925 */ 2926 if (!more_dirs) { 2927 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2928 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2929 2930 /* 2931 * kludge: see a comment in nfs_readdirrpc. 2932 */ 2933 2934 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2935 more_dirs = 0; 2936 } 2937 m_freem(mrep); 2938 } 2939 /* 2940 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2941 * by increasing d_reclen for the last record. 2942 */ 2943 if (blksiz > 0) { 2944 left = NFS_DIRFRAGSIZ - blksiz; 2945 memset(uiop->uio_iov->iov_base, 0, left); 2946 dp->d_reclen += left; 2947 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2948 UIO_ADVANCE(uiop, left); 2949 } 2950 2951 /* 2952 * We are now either at the end of the directory or have filled the 2953 * block. 2954 */ 2955 if (bigenough) { 2956 dnp->n_direofoffset = uiop->uio_offset; 2957 dnp->n_flag |= NEOFVALID; 2958 } 2959 nfsmout: 2960 if (newvp != NULLVP) { 2961 if(newvp == vp) 2962 vrele(newvp); 2963 else 2964 vput(newvp); 2965 } 2966 return (error); 2967 } 2968 #endif 2969 2970 /* 2971 * Silly rename. To make the NFS filesystem that is stateless look a little 2972 * more like the "ufs" a remove of an active vnode is translated to a rename 2973 * to a funny looking filename that is removed by nfs_inactive on the 2974 * nfsnode. There is the potential for another process on a different client 2975 * to create the same funny name between the nfs_lookitup() fails and the 2976 * nfs_rename() completes, but... 2977 */ 2978 int 2979 nfs_sillyrename(dvp, vp, cnp, dolink) 2980 struct vnode *dvp, *vp; 2981 struct componentname *cnp; 2982 boolean_t dolink; 2983 { 2984 struct sillyrename *sp; 2985 struct nfsnode *np; 2986 int error; 2987 short pid; 2988 2989 cache_purge(dvp); 2990 np = VTONFS(vp); 2991 #ifndef DIAGNOSTIC 2992 if (vp->v_type == VDIR) 2993 panic("nfs: sillyrename dir"); 2994 #endif 2995 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2996 M_NFSREQ, M_WAITOK); 2997 sp->s_cred = kauth_cred_dup(cnp->cn_cred); 2998 sp->s_dvp = dvp; 2999 VREF(dvp); 3000 3001 /* Fudge together a funny name */ 3002 pid = cnp->cn_lwp->l_proc->p_pid; 3003 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3004 sp->s_namlen = 12; 3005 sp->s_name[8] = hexdigits[pid & 0xf]; 3006 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3007 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3008 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3009 3010 /* Try lookitups until we get one that isn't there */ 3011 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3012 cnp->cn_lwp, (struct nfsnode **)0) == 0) { 3013 sp->s_name[4]++; 3014 if (sp->s_name[4] > 'z') { 3015 error = EINVAL; 3016 goto bad; 3017 } 3018 } 3019 if (dolink) { 3020 error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, 3021 sp->s_cred, cnp->cn_lwp); 3022 /* 3023 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 3024 */ 3025 if (error == ENOTSUP) { 3026 error = nfs_renameit(dvp, cnp, sp); 3027 } 3028 } else { 3029 error = nfs_renameit(dvp, cnp, sp); 3030 } 3031 if (error) 3032 goto bad; 3033 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3034 cnp->cn_lwp, &np); 3035 np->n_sillyrename = sp; 3036 return (0); 3037 bad: 3038 vrele(sp->s_dvp); 3039 kauth_cred_free(sp->s_cred); 3040 free((caddr_t)sp, M_NFSREQ); 3041 return (error); 3042 } 3043 3044 /* 3045 * Look up a file name and optionally either update the file handle or 3046 * allocate an nfsnode, depending on the value of npp. 3047 * npp == NULL --> just do the lookup 3048 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3049 * handled too 3050 * *npp != NULL --> update the file handle in the vnode 3051 */ 3052 int 3053 nfs_lookitup(dvp, name, len, cred, l, npp) 3054 struct vnode *dvp; 3055 const char *name; 3056 int len; 3057 kauth_cred_t cred; 3058 struct lwp *l; 3059 struct nfsnode **npp; 3060 { 3061 u_int32_t *tl; 3062 caddr_t cp; 3063 int32_t t1, t2; 3064 struct vnode *newvp = (struct vnode *)0; 3065 struct nfsnode *np, *dnp = VTONFS(dvp); 3066 caddr_t bpos, dpos, cp2; 3067 int error = 0, fhlen; 3068 #ifndef NFS_V2_ONLY 3069 int attrflag; 3070 #endif 3071 struct mbuf *mreq, *mrep, *md, *mb; 3072 nfsfh_t *nfhp; 3073 const int v3 = NFS_ISV3(dvp); 3074 3075 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3076 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3077 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3078 nfsm_fhtom(dnp, v3); 3079 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3080 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3081 if (npp && !error) { 3082 nfsm_getfh(nfhp, fhlen, v3); 3083 if (*npp) { 3084 np = *npp; 3085 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3086 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3087 np->n_fhp = &np->n_fh; 3088 } 3089 #if NFS_SMALLFH < NFSX_V3FHMAX 3090 else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3091 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3092 #endif 3093 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3094 np->n_fhsize = fhlen; 3095 newvp = NFSTOV(np); 3096 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3097 VREF(dvp); 3098 newvp = dvp; 3099 np = dnp; 3100 } else { 3101 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3102 if (error) { 3103 m_freem(mrep); 3104 return (error); 3105 } 3106 newvp = NFSTOV(np); 3107 } 3108 #ifndef NFS_V2_ONLY 3109 if (v3) { 3110 nfsm_postop_attr(newvp, attrflag, 0); 3111 if (!attrflag && *npp == NULL) { 3112 m_freem(mrep); 3113 vput(newvp); 3114 return (ENOENT); 3115 } 3116 } else 3117 #endif 3118 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3119 } 3120 nfsm_reqdone; 3121 if (npp && *npp == NULL) { 3122 if (error) { 3123 if (newvp) 3124 vput(newvp); 3125 } else 3126 *npp = np; 3127 } 3128 return (error); 3129 } 3130 3131 #ifndef NFS_V2_ONLY 3132 /* 3133 * Nfs Version 3 commit rpc 3134 */ 3135 int 3136 nfs_commit(vp, offset, cnt, l) 3137 struct vnode *vp; 3138 off_t offset; 3139 uint32_t cnt; 3140 struct lwp *l; 3141 { 3142 caddr_t cp; 3143 u_int32_t *tl; 3144 int32_t t1, t2; 3145 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3146 caddr_t bpos, dpos, cp2; 3147 int error = 0, wccflag = NFSV3_WCCRATTR; 3148 struct mbuf *mreq, *mrep, *md, *mb; 3149 struct nfsnode *np; 3150 3151 KASSERT(NFS_ISV3(vp)); 3152 3153 #ifdef NFS_DEBUG_COMMIT 3154 printf("commit %lu - %lu\n", (unsigned long)offset, 3155 (unsigned long)(offset + cnt)); 3156 #endif 3157 3158 simple_lock(&nmp->nm_slock); 3159 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3160 simple_unlock(&nmp->nm_slock); 3161 return (0); 3162 } 3163 simple_unlock(&nmp->nm_slock); 3164 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3165 np = VTONFS(vp); 3166 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3167 nfsm_fhtom(np, 1); 3168 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3169 txdr_hyper(offset, tl); 3170 tl += 2; 3171 *tl = txdr_unsigned(cnt); 3172 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3173 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3174 if (!error) { 3175 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3176 simple_lock(&nmp->nm_slock); 3177 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3178 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3179 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3180 error = NFSERR_STALEWRITEVERF; 3181 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3182 } 3183 simple_unlock(&nmp->nm_slock); 3184 } 3185 nfsm_reqdone; 3186 return (error); 3187 } 3188 #endif 3189 3190 /* 3191 * Kludge City.. 3192 * - make nfs_bmap() essentially a no-op that does no translation 3193 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3194 * (Maybe I could use the process's page mapping, but I was concerned that 3195 * Kernel Write might not be enabled and also figured copyout() would do 3196 * a lot more work than memcpy() and also it currently happens in the 3197 * context of the swapper process (2). 3198 */ 3199 int 3200 nfs_bmap(v) 3201 void *v; 3202 { 3203 struct vop_bmap_args /* { 3204 struct vnode *a_vp; 3205 daddr_t a_bn; 3206 struct vnode **a_vpp; 3207 daddr_t *a_bnp; 3208 int *a_runp; 3209 } */ *ap = v; 3210 struct vnode *vp = ap->a_vp; 3211 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3212 3213 if (ap->a_vpp != NULL) 3214 *ap->a_vpp = vp; 3215 if (ap->a_bnp != NULL) 3216 *ap->a_bnp = ap->a_bn << bshift; 3217 if (ap->a_runp != NULL) 3218 *ap->a_runp = 1024 * 1024; /* XXX */ 3219 return (0); 3220 } 3221 3222 /* 3223 * Strategy routine. 3224 * For async requests when nfsiod(s) are running, queue the request by 3225 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3226 * request. 3227 */ 3228 int 3229 nfs_strategy(v) 3230 void *v; 3231 { 3232 struct vop_strategy_args *ap = v; 3233 struct buf *bp = ap->a_bp; 3234 int error = 0; 3235 3236 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3237 panic("nfs physio/async"); 3238 3239 /* 3240 * If the op is asynchronous and an i/o daemon is waiting 3241 * queue the request, wake it up and wait for completion 3242 * otherwise just do it ourselves. 3243 */ 3244 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3245 error = nfs_doio(bp); 3246 return (error); 3247 } 3248 3249 /* 3250 * fsync vnode op. Just call nfs_flush() with commit == 1. 3251 */ 3252 /* ARGSUSED */ 3253 int 3254 nfs_fsync(v) 3255 void *v; 3256 { 3257 struct vop_fsync_args /* { 3258 struct vnodeop_desc *a_desc; 3259 struct vnode * a_vp; 3260 kauth_cred_t a_cred; 3261 int a_flags; 3262 off_t offlo; 3263 off_t offhi; 3264 struct lwp * a_l; 3265 } */ *ap = v; 3266 3267 struct vnode *vp = ap->a_vp; 3268 3269 if (vp->v_type != VREG) 3270 return 0; 3271 3272 return (nfs_flush(vp, ap->a_cred, 3273 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_l, 1)); 3274 } 3275 3276 /* 3277 * Flush all the data associated with a vnode. 3278 */ 3279 int 3280 nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, 3281 int commit) 3282 { 3283 struct nfsnode *np = VTONFS(vp); 3284 int error; 3285 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3286 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3287 3288 simple_lock(&vp->v_interlock); 3289 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3290 if (np->n_flag & NWRITEERR) { 3291 error = np->n_error; 3292 np->n_flag &= ~NWRITEERR; 3293 } 3294 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3295 return (error); 3296 } 3297 3298 /* 3299 * Return POSIX pathconf information applicable to nfs. 3300 * 3301 * N.B. The NFS V2 protocol doesn't support this RPC. 3302 */ 3303 /* ARGSUSED */ 3304 int 3305 nfs_pathconf(v) 3306 void *v; 3307 { 3308 struct vop_pathconf_args /* { 3309 struct vnode *a_vp; 3310 int a_name; 3311 register_t *a_retval; 3312 } */ *ap = v; 3313 struct nfsv3_pathconf *pcp; 3314 struct vnode *vp = ap->a_vp; 3315 struct mbuf *mreq, *mrep, *md, *mb; 3316 int32_t t1, t2; 3317 u_int32_t *tl; 3318 caddr_t bpos, dpos, cp, cp2; 3319 int error = 0, attrflag; 3320 #ifndef NFS_V2_ONLY 3321 struct nfsmount *nmp; 3322 unsigned int l; 3323 u_int64_t maxsize; 3324 #endif 3325 const int v3 = NFS_ISV3(vp); 3326 struct nfsnode *np = VTONFS(vp); 3327 3328 switch (ap->a_name) { 3329 /* Names that can be resolved locally. */ 3330 case _PC_PIPE_BUF: 3331 *ap->a_retval = PIPE_BUF; 3332 break; 3333 case _PC_SYNC_IO: 3334 *ap->a_retval = 1; 3335 break; 3336 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3337 case _PC_LINK_MAX: 3338 case _PC_NAME_MAX: 3339 case _PC_CHOWN_RESTRICTED: 3340 case _PC_NO_TRUNC: 3341 if (!v3) { 3342 error = EINVAL; 3343 break; 3344 } 3345 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3346 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3347 nfsm_fhtom(np, 1); 3348 nfsm_request(np, NFSPROC_PATHCONF, 3349 curlwp, curlwp->l_cred); /* XXX */ 3350 nfsm_postop_attr(vp, attrflag, 0); 3351 if (!error) { 3352 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3353 NFSX_V3PATHCONF); 3354 switch (ap->a_name) { 3355 case _PC_LINK_MAX: 3356 *ap->a_retval = 3357 fxdr_unsigned(register_t, pcp->pc_linkmax); 3358 break; 3359 case _PC_NAME_MAX: 3360 *ap->a_retval = 3361 fxdr_unsigned(register_t, pcp->pc_namemax); 3362 break; 3363 case _PC_CHOWN_RESTRICTED: 3364 *ap->a_retval = 3365 (pcp->pc_chownrestricted == nfs_true); 3366 break; 3367 case _PC_NO_TRUNC: 3368 *ap->a_retval = 3369 (pcp->pc_notrunc == nfs_true); 3370 break; 3371 } 3372 } 3373 nfsm_reqdone; 3374 break; 3375 case _PC_FILESIZEBITS: 3376 #ifndef NFS_V2_ONLY 3377 if (v3) { 3378 nmp = VFSTONFS(vp->v_mount); 3379 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3380 if ((error = nfs_fsinfo(nmp, vp, 3381 curlwp->l_cred, curlwp)) != 0) /* XXX */ 3382 break; 3383 for (l = 0, maxsize = nmp->nm_maxfilesize; 3384 (maxsize >> l) > 0; l++) 3385 ; 3386 *ap->a_retval = l + 1; 3387 } else 3388 #endif 3389 { 3390 *ap->a_retval = 32; /* NFS V2 limitation */ 3391 } 3392 break; 3393 default: 3394 error = EINVAL; 3395 break; 3396 } 3397 3398 return (error); 3399 } 3400 3401 /* 3402 * NFS advisory byte-level locks. 3403 */ 3404 int 3405 nfs_advlock(v) 3406 void *v; 3407 { 3408 struct vop_advlock_args /* { 3409 struct vnode *a_vp; 3410 caddr_t a_id; 3411 int a_op; 3412 struct flock *a_fl; 3413 int a_flags; 3414 } */ *ap = v; 3415 struct nfsnode *np = VTONFS(ap->a_vp); 3416 3417 return lf_advlock(ap, &np->n_lockf, np->n_size); 3418 } 3419 3420 /* 3421 * Print out the contents of an nfsnode. 3422 */ 3423 int 3424 nfs_print(v) 3425 void *v; 3426 { 3427 struct vop_print_args /* { 3428 struct vnode *a_vp; 3429 } */ *ap = v; 3430 struct vnode *vp = ap->a_vp; 3431 struct nfsnode *np = VTONFS(vp); 3432 3433 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3434 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3435 if (vp->v_type == VFIFO) 3436 fifo_printinfo(vp); 3437 printf("\n"); 3438 return (0); 3439 } 3440 3441 /* 3442 * nfs unlock wrapper. 3443 */ 3444 int 3445 nfs_unlock(void *v) 3446 { 3447 struct vop_unlock_args /* { 3448 struct vnode *a_vp; 3449 int a_flags; 3450 } */ *ap = v; 3451 struct vnode *vp = ap->a_vp; 3452 3453 /* 3454 * VOP_UNLOCK can be called by nfs_loadattrcache 3455 * with v_data == 0. 3456 */ 3457 if (VTONFS(vp)) { 3458 nfs_delayedtruncate(vp); 3459 } 3460 3461 return genfs_unlock(v); 3462 } 3463 3464 /* 3465 * nfs special file access vnode op. 3466 * Essentially just get vattr and then imitate iaccess() since the device is 3467 * local to the client. 3468 */ 3469 int 3470 nfsspec_access(v) 3471 void *v; 3472 { 3473 struct vop_access_args /* { 3474 struct vnode *a_vp; 3475 int a_mode; 3476 kauth_cred_t a_cred; 3477 struct lwp *a_l; 3478 } */ *ap = v; 3479 struct vattr va; 3480 struct vnode *vp = ap->a_vp; 3481 int error; 3482 3483 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_l); 3484 if (error) 3485 return (error); 3486 3487 /* 3488 * Disallow write attempts on filesystems mounted read-only; 3489 * unless the file is a socket, fifo, or a block or character 3490 * device resident on the filesystem. 3491 */ 3492 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3493 switch (vp->v_type) { 3494 case VREG: 3495 case VDIR: 3496 case VLNK: 3497 return (EROFS); 3498 default: 3499 break; 3500 } 3501 } 3502 3503 return (vaccess(va.va_type, va.va_mode, 3504 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3505 } 3506 3507 /* 3508 * Read wrapper for special devices. 3509 */ 3510 int 3511 nfsspec_read(v) 3512 void *v; 3513 { 3514 struct vop_read_args /* { 3515 struct vnode *a_vp; 3516 struct uio *a_uio; 3517 int a_ioflag; 3518 kauth_cred_t a_cred; 3519 } */ *ap = v; 3520 struct nfsnode *np = VTONFS(ap->a_vp); 3521 3522 /* 3523 * Set access flag. 3524 */ 3525 np->n_flag |= NACC; 3526 getnanotime(&np->n_atim); 3527 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3528 } 3529 3530 /* 3531 * Write wrapper for special devices. 3532 */ 3533 int 3534 nfsspec_write(v) 3535 void *v; 3536 { 3537 struct vop_write_args /* { 3538 struct vnode *a_vp; 3539 struct uio *a_uio; 3540 int a_ioflag; 3541 kauth_cred_t a_cred; 3542 } */ *ap = v; 3543 struct nfsnode *np = VTONFS(ap->a_vp); 3544 3545 /* 3546 * Set update flag. 3547 */ 3548 np->n_flag |= NUPD; 3549 getnanotime(&np->n_mtim); 3550 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3551 } 3552 3553 /* 3554 * Close wrapper for special devices. 3555 * 3556 * Update the times on the nfsnode then do device close. 3557 */ 3558 int 3559 nfsspec_close(v) 3560 void *v; 3561 { 3562 struct vop_close_args /* { 3563 struct vnode *a_vp; 3564 int a_fflag; 3565 kauth_cred_t a_cred; 3566 struct lwp *a_l; 3567 } */ *ap = v; 3568 struct vnode *vp = ap->a_vp; 3569 struct nfsnode *np = VTONFS(vp); 3570 struct vattr vattr; 3571 3572 if (np->n_flag & (NACC | NUPD)) { 3573 np->n_flag |= NCHG; 3574 if (vp->v_usecount == 1 && 3575 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3576 VATTR_NULL(&vattr); 3577 if (np->n_flag & NACC) 3578 vattr.va_atime = np->n_atim; 3579 if (np->n_flag & NUPD) 3580 vattr.va_mtime = np->n_mtim; 3581 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3582 } 3583 } 3584 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3585 } 3586 3587 /* 3588 * Read wrapper for fifos. 3589 */ 3590 int 3591 nfsfifo_read(v) 3592 void *v; 3593 { 3594 struct vop_read_args /* { 3595 struct vnode *a_vp; 3596 struct uio *a_uio; 3597 int a_ioflag; 3598 kauth_cred_t a_cred; 3599 } */ *ap = v; 3600 struct nfsnode *np = VTONFS(ap->a_vp); 3601 3602 /* 3603 * Set access flag. 3604 */ 3605 np->n_flag |= NACC; 3606 getnanotime(&np->n_atim); 3607 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3608 } 3609 3610 /* 3611 * Write wrapper for fifos. 3612 */ 3613 int 3614 nfsfifo_write(v) 3615 void *v; 3616 { 3617 struct vop_write_args /* { 3618 struct vnode *a_vp; 3619 struct uio *a_uio; 3620 int a_ioflag; 3621 kauth_cred_t a_cred; 3622 } */ *ap = v; 3623 struct nfsnode *np = VTONFS(ap->a_vp); 3624 3625 /* 3626 * Set update flag. 3627 */ 3628 np->n_flag |= NUPD; 3629 getnanotime(&np->n_mtim); 3630 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3631 } 3632 3633 /* 3634 * Close wrapper for fifos. 3635 * 3636 * Update the times on the nfsnode then do fifo close. 3637 */ 3638 int 3639 nfsfifo_close(v) 3640 void *v; 3641 { 3642 struct vop_close_args /* { 3643 struct vnode *a_vp; 3644 int a_fflag; 3645 kauth_cred_t a_cred; 3646 struct lwp *a_l; 3647 } */ *ap = v; 3648 struct vnode *vp = ap->a_vp; 3649 struct nfsnode *np = VTONFS(vp); 3650 struct vattr vattr; 3651 3652 if (np->n_flag & (NACC | NUPD)) { 3653 struct timespec ts; 3654 3655 getnanotime(&ts); 3656 if (np->n_flag & NACC) 3657 np->n_atim = ts; 3658 if (np->n_flag & NUPD) 3659 np->n_mtim = ts; 3660 np->n_flag |= NCHG; 3661 if (vp->v_usecount == 1 && 3662 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3663 VATTR_NULL(&vattr); 3664 if (np->n_flag & NACC) 3665 vattr.va_atime = np->n_atim; 3666 if (np->n_flag & NUPD) 3667 vattr.va_mtime = np->n_mtim; 3668 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3669 } 3670 } 3671 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3672 } 3673
Indexes created Mon Sep 22 21:09:42 GMT 2025