nfs_vnops.c revision 1.241.4.1
1 /* $NetBSD: nfs_vnops.c,v 1.241.4.1 2006/11/18 21:39:44 ad 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 1.241.4.1 2006/11/18 21:39:44 ad 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/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 112 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 113 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 114 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 115 { &vop_seek_desc, nfs_seek }, /* seek */ 116 { &vop_remove_desc, nfs_remove }, /* remove */ 117 { &vop_link_desc, nfs_link }, /* link */ 118 { &vop_rename_desc, nfs_rename }, /* rename */ 119 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 120 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 121 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 122 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 123 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 124 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 125 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 126 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 127 { &vop_lock_desc, nfs_lock }, /* lock */ 128 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 129 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 130 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 131 { &vop_print_desc, nfs_print }, /* print */ 132 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 133 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 134 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 135 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 136 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 137 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 138 { NULL, NULL } 139 }; 140 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 141 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 142 143 /* 144 * Special device vnode ops 145 */ 146 int (**spec_nfsv2nodeop_p) __P((void *)); 147 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 148 { &vop_default_desc, vn_default_error }, 149 { &vop_lookup_desc, spec_lookup }, /* lookup */ 150 { &vop_create_desc, spec_create }, /* create */ 151 { &vop_mknod_desc, spec_mknod }, /* mknod */ 152 { &vop_open_desc, spec_open }, /* open */ 153 { &vop_close_desc, nfsspec_close }, /* close */ 154 { &vop_access_desc, nfsspec_access }, /* access */ 155 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 156 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 157 { &vop_read_desc, nfsspec_read }, /* read */ 158 { &vop_write_desc, nfsspec_write }, /* write */ 159 { &vop_lease_desc, spec_lease_check }, /* lease */ 160 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 161 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 162 { &vop_poll_desc, spec_poll }, /* poll */ 163 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 164 { &vop_revoke_desc, spec_revoke }, /* revoke */ 165 { &vop_mmap_desc, spec_mmap }, /* mmap */ 166 { &vop_fsync_desc, spec_fsync }, /* fsync */ 167 { &vop_seek_desc, spec_seek }, /* seek */ 168 { &vop_remove_desc, spec_remove }, /* remove */ 169 { &vop_link_desc, spec_link }, /* link */ 170 { &vop_rename_desc, spec_rename }, /* rename */ 171 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 172 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 173 { &vop_symlink_desc, spec_symlink }, /* symlink */ 174 { &vop_readdir_desc, spec_readdir }, /* readdir */ 175 { &vop_readlink_desc, spec_readlink }, /* readlink */ 176 { &vop_abortop_desc, spec_abortop }, /* abortop */ 177 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 178 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 179 { &vop_lock_desc, nfs_lock }, /* lock */ 180 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 181 { &vop_bmap_desc, spec_bmap }, /* bmap */ 182 { &vop_strategy_desc, spec_strategy }, /* strategy */ 183 { &vop_print_desc, nfs_print }, /* print */ 184 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 185 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 186 { &vop_advlock_desc, spec_advlock }, /* advlock */ 187 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 188 { &vop_getpages_desc, spec_getpages }, /* getpages */ 189 { &vop_putpages_desc, spec_putpages }, /* putpages */ 190 { NULL, NULL } 191 }; 192 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 193 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 194 195 int (**fifo_nfsv2nodeop_p) __P((void *)); 196 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 197 { &vop_default_desc, vn_default_error }, 198 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 199 { &vop_create_desc, fifo_create }, /* create */ 200 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 201 { &vop_open_desc, fifo_open }, /* open */ 202 { &vop_close_desc, nfsfifo_close }, /* close */ 203 { &vop_access_desc, nfsspec_access }, /* access */ 204 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 205 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 206 { &vop_read_desc, nfsfifo_read }, /* read */ 207 { &vop_write_desc, nfsfifo_write }, /* write */ 208 { &vop_lease_desc, fifo_lease_check }, /* lease */ 209 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 210 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 211 { &vop_poll_desc, fifo_poll }, /* poll */ 212 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 213 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 214 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 215 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 216 { &vop_seek_desc, fifo_seek }, /* seek */ 217 { &vop_remove_desc, fifo_remove }, /* remove */ 218 { &vop_link_desc, fifo_link }, /* link */ 219 { &vop_rename_desc, fifo_rename }, /* rename */ 220 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 221 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 222 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 223 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 224 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 225 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 226 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 227 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 228 { &vop_lock_desc, nfs_lock }, /* lock */ 229 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 230 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 231 { &vop_strategy_desc, genfs_badop }, /* strategy */ 232 { &vop_print_desc, nfs_print }, /* print */ 233 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 234 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 235 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 236 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 237 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 238 { NULL, NULL } 239 }; 240 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 241 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 242 243 static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, 244 size_t, kauth_cred_t, struct lwp *); 245 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 246 247 /* 248 * Global variables 249 */ 250 extern u_int32_t nfs_true, nfs_false; 251 extern u_int32_t nfs_xdrneg1; 252 extern const nfstype nfsv3_type[9]; 253 254 int nfs_numasync = 0; 255 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 256 #define UIO_ADVANCE(uio, siz) \ 257 (void)((uio)->uio_resid -= (siz), \ 258 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 259 (uio)->uio_iov->iov_len -= (siz)) 260 261 static void nfs_cache_enter(struct vnode *, struct vnode *, 262 struct componentname *); 263 264 static void 265 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 266 struct componentname *cnp) 267 { 268 struct nfsnode *dnp = VTONFS(dvp); 269 270 if (vp != NULL) { 271 struct nfsnode *np = VTONFS(vp); 272 273 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 274 } 275 276 if (!timespecisset(&dnp->n_nctime)) 277 dnp->n_nctime = dnp->n_vattr->va_mtime; 278 279 cache_enter(dvp, vp, cnp); 280 } 281 282 /* 283 * nfs null call from vfs. 284 */ 285 int 286 nfs_null(vp, cred, l) 287 struct vnode *vp; 288 kauth_cred_t cred; 289 struct lwp *l; 290 { 291 caddr_t bpos, dpos; 292 int error = 0; 293 struct mbuf *mreq, *mrep, *md, *mb; 294 struct nfsnode *np = VTONFS(vp); 295 296 nfsm_reqhead(np, NFSPROC_NULL, 0); 297 nfsm_request(np, NFSPROC_NULL, l, cred); 298 nfsm_reqdone; 299 return (error); 300 } 301 302 /* 303 * nfs access vnode op. 304 * For nfs version 2, just return ok. File accesses may fail later. 305 * For nfs version 3, use the access rpc to check accessibility. If file modes 306 * are changed on the server, accesses might still fail later. 307 */ 308 int 309 nfs_access(v) 310 void *v; 311 { 312 struct vop_access_args /* { 313 struct vnode *a_vp; 314 int a_mode; 315 kauth_cred_t a_cred; 316 struct lwp *a_l; 317 } */ *ap = v; 318 struct vnode *vp = ap->a_vp; 319 #ifndef NFS_V2_ONLY 320 u_int32_t *tl; 321 caddr_t cp; 322 int32_t t1, t2; 323 caddr_t bpos, dpos, cp2; 324 int error = 0, attrflag; 325 struct mbuf *mreq, *mrep, *md, *mb; 326 u_int32_t mode, rmode; 327 const int v3 = NFS_ISV3(vp); 328 #endif 329 int cachevalid; 330 struct nfsnode *np = VTONFS(vp); 331 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 332 333 cachevalid = (np->n_accstamp != -1 && 334 (time_uptime - np->n_accstamp) < NFS_ATTRTIMEO(nmp, np) && 335 np->n_accuid == kauth_cred_geteuid(ap->a_cred)); 336 337 /* 338 * Check access cache first. If this request has been made for this 339 * uid shortly before, use the cached result. 340 */ 341 if (cachevalid) { 342 if (!np->n_accerror) { 343 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 344 return np->n_accerror; 345 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 346 return np->n_accerror; 347 } 348 349 #ifndef NFS_V2_ONLY 350 /* 351 * For nfs v3, do an access rpc, otherwise you are stuck emulating 352 * ufs_access() locally using the vattr. This may not be correct, 353 * since the server may apply other access criteria such as 354 * client uid-->server uid mapping that we do not know about, but 355 * this is better than just returning anything that is lying about 356 * in the cache. 357 */ 358 if (v3) { 359 nfsstats.rpccnt[NFSPROC_ACCESS]++; 360 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 361 nfsm_fhtom(np, v3); 362 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 363 if (ap->a_mode & VREAD) 364 mode = NFSV3ACCESS_READ; 365 else 366 mode = 0; 367 if (vp->v_type != VDIR) { 368 if (ap->a_mode & VWRITE) 369 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 370 if (ap->a_mode & VEXEC) 371 mode |= NFSV3ACCESS_EXECUTE; 372 } else { 373 if (ap->a_mode & VWRITE) 374 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 375 NFSV3ACCESS_DELETE); 376 if (ap->a_mode & VEXEC) 377 mode |= NFSV3ACCESS_LOOKUP; 378 } 379 *tl = txdr_unsigned(mode); 380 nfsm_request(np, NFSPROC_ACCESS, ap->a_l, ap->a_cred); 381 nfsm_postop_attr(vp, attrflag, 0); 382 if (!error) { 383 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 384 rmode = fxdr_unsigned(u_int32_t, *tl); 385 /* 386 * The NFS V3 spec does not clarify whether or not 387 * the returned access bits can be a superset of 388 * the ones requested, so... 389 */ 390 if ((rmode & mode) != mode) 391 error = EACCES; 392 } 393 nfsm_reqdone; 394 } else 395 #endif 396 return (nfsspec_access(ap)); 397 #ifndef NFS_V2_ONLY 398 /* 399 * Disallow write attempts on filesystems mounted read-only; 400 * unless the file is a socket, fifo, or a block or character 401 * device resident on the filesystem. 402 */ 403 if (!error && (ap->a_mode & VWRITE) && 404 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 405 switch (vp->v_type) { 406 case VREG: 407 case VDIR: 408 case VLNK: 409 error = EROFS; 410 default: 411 break; 412 } 413 } 414 415 if (!error || error == EACCES) { 416 /* 417 * If we got the same result as for a previous, 418 * different request, OR it in. Don't update 419 * the timestamp in that case. 420 */ 421 if (cachevalid && np->n_accstamp != -1 && 422 error == np->n_accerror) { 423 if (!error) 424 np->n_accmode |= ap->a_mode; 425 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 426 np->n_accmode = ap->a_mode; 427 } else { 428 np->n_accstamp = time_uptime; 429 np->n_accuid = kauth_cred_geteuid(ap->a_cred); 430 np->n_accmode = ap->a_mode; 431 np->n_accerror = error; 432 } 433 } 434 435 return (error); 436 #endif 437 } 438 439 /* 440 * nfs open vnode op 441 * Check to see if the type is ok 442 * and that deletion is not in progress. 443 * For paged in text files, you will need to flush the page cache 444 * if consistency is lost. 445 */ 446 /* ARGSUSED */ 447 int 448 nfs_open(v) 449 void *v; 450 { 451 struct vop_open_args /* { 452 struct vnode *a_vp; 453 int a_mode; 454 kauth_cred_t a_cred; 455 struct lwp *a_l; 456 } */ *ap = v; 457 struct vnode *vp = ap->a_vp; 458 struct nfsnode *np = VTONFS(vp); 459 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 460 int error; 461 462 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 463 return (EACCES); 464 } 465 466 if (ap->a_mode & FREAD) { 467 if (np->n_rcred != NULL) 468 kauth_cred_free(np->n_rcred); 469 np->n_rcred = ap->a_cred; 470 kauth_cred_hold(np->n_rcred); 471 } 472 if (ap->a_mode & FWRITE) { 473 if (np->n_wcred != NULL) 474 kauth_cred_free(np->n_wcred); 475 np->n_wcred = ap->a_cred; 476 kauth_cred_hold(np->n_wcred); 477 } 478 479 #ifndef NFS_V2_ONLY 480 /* 481 * Get a valid lease. If cached data is stale, flush it. 482 */ 483 if (nmp->nm_flag & NFSMNT_NQNFS) { 484 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 485 do { 486 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 487 ap->a_l); 488 } while (error == NQNFS_EXPIRED); 489 if (error) 490 return (error); 491 if (np->n_lrev != np->n_brev || 492 (np->n_flag & NQNFSNONCACHE)) { 493 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 494 ap->a_l, 1)) == EINTR) 495 return (error); 496 np->n_brev = np->n_lrev; 497 } 498 } 499 } else 500 #endif 501 { 502 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_l, 0); 503 if (error) 504 return error; 505 } 506 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 507 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 508 return (0); 509 } 510 511 /* 512 * nfs close vnode op 513 * What an NFS client should do upon close after writing is a debatable issue. 514 * Most NFS clients push delayed writes to the server upon close, basically for 515 * two reasons: 516 * 1 - So that any write errors may be reported back to the client process 517 * doing the close system call. By far the two most likely errors are 518 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 519 * 2 - To put a worst case upper bound on cache inconsistency between 520 * multiple clients for the file. 521 * There is also a consistency problem for Version 2 of the protocol w.r.t. 522 * not being able to tell if other clients are writing a file concurrently, 523 * since there is no way of knowing if the changed modify time in the reply 524 * is only due to the write for this client. 525 * (NFS Version 3 provides weak cache consistency data in the reply that 526 * should be sufficient to detect and handle this case.) 527 * 528 * The current code does the following: 529 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 530 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 531 * or commit them (this satisfies 1 and 2 except for the 532 * case where the server crashes after this close but 533 * before the commit RPC, which is felt to be "good 534 * enough". Changing the last argument to nfs_flush() to 535 * a 1 would force a commit operation, if it is felt a 536 * commit is necessary now. 537 * for NQNFS - do nothing now, since 2 is dealt with via leases and 538 * 1 should be dealt with via an fsync() system call for 539 * cases where write errors are important. 540 */ 541 /* ARGSUSED */ 542 int 543 nfs_close(v) 544 void *v; 545 { 546 struct vop_close_args /* { 547 struct vnodeop_desc *a_desc; 548 struct vnode *a_vp; 549 int a_fflag; 550 kauth_cred_t a_cred; 551 struct lwp *a_l; 552 } */ *ap = v; 553 struct vnode *vp = ap->a_vp; 554 struct nfsnode *np = VTONFS(vp); 555 int error = 0; 556 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 557 558 if (vp->v_type == VREG) { 559 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 560 (np->n_flag & NMODIFIED)) { 561 #ifndef NFS_V2_ONLY 562 if (NFS_ISV3(vp)) { 563 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_l, 0); 564 np->n_flag &= ~NMODIFIED; 565 } else 566 #endif 567 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_l, 1); 568 NFS_INVALIDATE_ATTRCACHE(np); 569 } 570 if (np->n_flag & NWRITEERR) { 571 np->n_flag &= ~NWRITEERR; 572 error = np->n_error; 573 } 574 } 575 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 576 return (error); 577 } 578 579 /* 580 * nfs getattr call from vfs. 581 */ 582 int 583 nfs_getattr(v) 584 void *v; 585 { 586 struct vop_getattr_args /* { 587 struct vnode *a_vp; 588 struct vattr *a_vap; 589 kauth_cred_t a_cred; 590 struct lwp *a_l; 591 } */ *ap = v; 592 struct vnode *vp = ap->a_vp; 593 struct nfsnode *np = VTONFS(vp); 594 caddr_t cp; 595 u_int32_t *tl; 596 int32_t t1, t2; 597 caddr_t bpos, dpos; 598 int error = 0; 599 struct mbuf *mreq, *mrep, *md, *mb; 600 const int v3 = NFS_ISV3(vp); 601 602 /* 603 * Update local times for special files. 604 */ 605 if (np->n_flag & (NACC | NUPD)) 606 np->n_flag |= NCHG; 607 608 /* 609 * if we have delayed truncation, do it now. 610 */ 611 nfs_delayedtruncate(vp); 612 613 /* 614 * First look in the cache. 615 */ 616 if (nfs_getattrcache(vp, ap->a_vap) == 0) 617 return (0); 618 nfsstats.rpccnt[NFSPROC_GETATTR]++; 619 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 620 nfsm_fhtom(np, v3); 621 nfsm_request(np, NFSPROC_GETATTR, ap->a_l, ap->a_cred); 622 if (!error) { 623 nfsm_loadattr(vp, ap->a_vap, 0); 624 if (vp->v_type == VDIR && 625 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 626 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 627 } 628 nfsm_reqdone; 629 return (error); 630 } 631 632 /* 633 * nfs setattr call. 634 */ 635 int 636 nfs_setattr(v) 637 void *v; 638 { 639 struct vop_setattr_args /* { 640 struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 struct vattr *a_vap; 643 kauth_cred_t a_cred; 644 struct lwp *a_l; 645 } */ *ap = v; 646 struct vnode *vp = ap->a_vp; 647 struct nfsnode *np = VTONFS(vp); 648 struct vattr *vap = ap->a_vap; 649 int error = 0; 650 u_quad_t tsize = 0; 651 652 /* 653 * Setting of flags is not supported. 654 */ 655 if (vap->va_flags != VNOVAL) 656 return (EOPNOTSUPP); 657 658 /* 659 * Disallow write attempts if the filesystem is mounted read-only. 660 */ 661 if ((vap->va_uid != (uid_t)VNOVAL || 662 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 663 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 664 (vp->v_mount->mnt_flag & MNT_RDONLY)) 665 return (EROFS); 666 if (vap->va_size != VNOVAL) { 667 switch (vp->v_type) { 668 case VDIR: 669 return (EISDIR); 670 case VCHR: 671 case VBLK: 672 case VSOCK: 673 case VFIFO: 674 if (vap->va_mtime.tv_sec == VNOVAL && 675 vap->va_atime.tv_sec == VNOVAL && 676 vap->va_mode == (mode_t)VNOVAL && 677 vap->va_uid == (uid_t)VNOVAL && 678 vap->va_gid == (gid_t)VNOVAL) 679 return (0); 680 vap->va_size = VNOVAL; 681 break; 682 default: 683 /* 684 * Disallow write attempts if the filesystem is 685 * mounted read-only. 686 */ 687 if (vp->v_mount->mnt_flag & MNT_RDONLY) 688 return (EROFS); 689 genfs_node_wrlock(vp); 690 uvm_vnp_setsize(vp, vap->va_size); 691 tsize = np->n_size; 692 np->n_size = vap->va_size; 693 if (vap->va_size == 0) 694 error = nfs_vinvalbuf(vp, 0, 695 ap->a_cred, ap->a_l, 1); 696 else 697 error = nfs_vinvalbuf(vp, V_SAVE, 698 ap->a_cred, ap->a_l, 1); 699 if (error) { 700 uvm_vnp_setsize(vp, tsize); 701 genfs_node_unlock(vp); 702 return (error); 703 } 704 np->n_vattr->va_size = vap->va_size; 705 } 706 } else { 707 /* 708 * flush files before setattr because a later write of 709 * cached data might change timestamps or reset sugid bits 710 */ 711 if ((vap->va_mtime.tv_sec != VNOVAL || 712 vap->va_atime.tv_sec != VNOVAL || 713 vap->va_mode != VNOVAL) && 714 vp->v_type == VREG && 715 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 716 ap->a_l, 1)) == EINTR) 717 return (error); 718 } 719 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_l); 720 if (vap->va_size != VNOVAL) { 721 if (error) { 722 np->n_size = np->n_vattr->va_size = tsize; 723 uvm_vnp_setsize(vp, np->n_size); 724 } 725 genfs_node_unlock(vp); 726 } 727 VN_KNOTE(vp, NOTE_ATTRIB); 728 return (error); 729 } 730 731 /* 732 * Do an nfs setattr rpc. 733 */ 734 int 735 nfs_setattrrpc(vp, vap, cred, l) 736 struct vnode *vp; 737 struct vattr *vap; 738 kauth_cred_t cred; 739 struct lwp *l; 740 { 741 struct nfsv2_sattr *sp; 742 caddr_t cp; 743 int32_t t1, t2; 744 caddr_t bpos, dpos; 745 u_int32_t *tl; 746 int error = 0; 747 struct mbuf *mreq, *mrep, *md, *mb; 748 const int v3 = NFS_ISV3(vp); 749 struct nfsnode *np = VTONFS(vp); 750 #ifndef NFS_V2_ONLY 751 int wccflag = NFSV3_WCCRATTR; 752 caddr_t cp2; 753 #endif 754 755 nfsstats.rpccnt[NFSPROC_SETATTR]++; 756 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 757 nfsm_fhtom(np, v3); 758 #ifndef NFS_V2_ONLY 759 if (v3) { 760 nfsm_v3attrbuild(vap, TRUE); 761 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 762 *tl = nfs_false; 763 } else { 764 #endif 765 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 766 if (vap->va_mode == (mode_t)VNOVAL) 767 sp->sa_mode = nfs_xdrneg1; 768 else 769 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 770 if (vap->va_uid == (uid_t)VNOVAL) 771 sp->sa_uid = nfs_xdrneg1; 772 else 773 sp->sa_uid = txdr_unsigned(vap->va_uid); 774 if (vap->va_gid == (gid_t)VNOVAL) 775 sp->sa_gid = nfs_xdrneg1; 776 else 777 sp->sa_gid = txdr_unsigned(vap->va_gid); 778 sp->sa_size = txdr_unsigned(vap->va_size); 779 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 780 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 781 #ifndef NFS_V2_ONLY 782 } 783 #endif 784 nfsm_request(np, NFSPROC_SETATTR, l, cred); 785 #ifndef NFS_V2_ONLY 786 if (v3) { 787 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 788 } else 789 #endif 790 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 791 nfsm_reqdone; 792 return (error); 793 } 794 795 /* 796 * nfs lookup call, one step at a time... 797 * First look in cache 798 * If not found, unlock the directory nfsnode and do the rpc 799 * 800 * This code is full of lock/unlock statements and checks, because 801 * we continue after cache_lookup has finished (we need to check 802 * with the attr cache and do an rpc if it has timed out). This means 803 * that the locking effects of cache_lookup have to be taken into 804 * account. 805 */ 806 int 807 nfs_lookup(v) 808 void *v; 809 { 810 struct vop_lookup_args /* { 811 struct vnodeop_desc *a_desc; 812 struct vnode *a_dvp; 813 struct vnode **a_vpp; 814 struct componentname *a_cnp; 815 } */ *ap = v; 816 struct componentname *cnp = ap->a_cnp; 817 struct vnode *dvp = ap->a_dvp; 818 struct vnode **vpp = ap->a_vpp; 819 int flags; 820 struct vnode *newvp; 821 u_int32_t *tl; 822 caddr_t cp; 823 int32_t t1, t2; 824 caddr_t bpos, dpos, cp2; 825 struct mbuf *mreq, *mrep, *md, *mb; 826 long len; 827 nfsfh_t *fhp; 828 struct nfsnode *np; 829 int lockparent, wantparent, error = 0, attrflag, fhsize; 830 const int v3 = NFS_ISV3(dvp); 831 832 cnp->cn_flags &= ~PDIRUNLOCK; 833 flags = cnp->cn_flags; 834 835 *vpp = NULLVP; 836 newvp = NULLVP; 837 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 838 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 839 return (EROFS); 840 if (dvp->v_type != VDIR) 841 return (ENOTDIR); 842 843 /* 844 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 845 */ 846 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 847 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 848 if (error) 849 return error; 850 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 851 return EISDIR; 852 VREF(dvp); 853 *vpp = dvp; 854 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 855 cnp->cn_flags |= SAVENAME; 856 return 0; 857 } 858 859 lockparent = flags & LOCKPARENT; 860 wantparent = flags & (LOCKPARENT|WANTPARENT); 861 np = VTONFS(dvp); 862 863 /* 864 * Before tediously performing a linear scan of the directory, 865 * check the name cache to see if the directory/name pair 866 * we are looking for is known already. 867 * If the directory/name pair is found in the name cache, 868 * we have to ensure the directory has not changed from 869 * the time the cache entry has been created. If it has, 870 * the cache entry has to be ignored. 871 */ 872 error = cache_lookup_raw(dvp, vpp, cnp); 873 KASSERT(dvp != *vpp); 874 if (error >= 0) { 875 struct vattr vattr; 876 int err2; 877 878 if (error && error != ENOENT) { 879 *vpp = NULLVP; 880 return error; 881 } 882 883 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 884 if (err2 != 0) { 885 if (error == 0) 886 vrele(*vpp); 887 *vpp = NULLVP; 888 return err2; 889 } 890 891 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 892 cnp->cn_lwp) || timespeccmp(&vattr.va_mtime, 893 &VTONFS(dvp)->n_nctime, !=)) { 894 if (error == 0) { 895 vrele(*vpp); 896 *vpp = NULLVP; 897 } 898 cache_purge1(dvp, NULL, PURGE_CHILDREN); 899 timespecclear(&np->n_nctime); 900 goto dorpc; 901 } 902 903 if (error == ENOENT) { 904 goto noentry; 905 } 906 907 newvp = *vpp; 908 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp) 909 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 910 nfsstats.lookupcache_hits++; 911 if ((flags & ISDOTDOT) != 0 || 912 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 913 VOP_UNLOCK(dvp, 0); 914 cnp->cn_flags |= PDIRUNLOCK; 915 } 916 error = vn_lock(newvp, LK_EXCLUSIVE); 917 if (error) { 918 /* newvp has been revoked. */ 919 vrele(newvp); 920 *vpp = NULL; 921 return error; 922 } 923 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 924 && (cnp->cn_flags & PDIRUNLOCK)) { 925 KASSERT(flags & ISDOTDOT); 926 error = vn_lock(dvp, LK_EXCLUSIVE); 927 if (error) { 928 vput(newvp); 929 *vpp = NULL; 930 return error; 931 } 932 cnp->cn_flags &= ~PDIRUNLOCK; 933 } 934 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 935 cnp->cn_flags |= SAVENAME; 936 KASSERT(newvp->v_type != VNON); 937 return (0); 938 } 939 cache_purge1(newvp, NULL, PURGE_PARENTS); 940 vrele(newvp); 941 *vpp = NULLVP; 942 } 943 dorpc: 944 #if 0 945 /* 946 * because nfsv3 has the same CREATE semantics as ours, 947 * we don't have to perform LOOKUPs beforehand. 948 * 949 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 950 * XXX although we have no way to know if O_EXCL is requested or not. 951 */ 952 953 if (v3 && cnp->cn_nameiop == CREATE && 954 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 955 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 956 KASSERT(lockparent); 957 cnp->cn_flags |= SAVENAME; 958 return (EJUSTRETURN); 959 } 960 #endif /* 0 */ 961 962 error = 0; 963 newvp = NULLVP; 964 nfsstats.lookupcache_misses++; 965 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 966 len = cnp->cn_namelen; 967 nfsm_reqhead(np, NFSPROC_LOOKUP, 968 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 969 nfsm_fhtom(np, v3); 970 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 971 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_lwp, cnp->cn_cred); 972 if (error) { 973 nfsm_postop_attr(dvp, attrflag, 0); 974 m_freem(mrep); 975 goto nfsmout; 976 } 977 nfsm_getfh(fhp, fhsize, v3); 978 979 /* 980 * Handle RENAME case... 981 */ 982 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 983 if (NFS_CMPFH(np, fhp, fhsize)) { 984 m_freem(mrep); 985 return (EISDIR); 986 } 987 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 988 if (error) { 989 m_freem(mrep); 990 return error; 991 } 992 newvp = NFSTOV(np); 993 #ifndef NFS_V2_ONLY 994 if (v3) { 995 nfsm_postop_attr(newvp, attrflag, 0); 996 nfsm_postop_attr(dvp, attrflag, 0); 997 } else 998 #endif 999 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1000 *vpp = newvp; 1001 m_freem(mrep); 1002 cnp->cn_flags |= SAVENAME; 1003 if (!lockparent) { 1004 VOP_UNLOCK(dvp, 0); 1005 cnp->cn_flags |= PDIRUNLOCK; 1006 } 1007 goto validate; 1008 } 1009 1010 /* 1011 * The postop attr handling is duplicated for each if case, 1012 * because it should be done while dvp is locked (unlocking 1013 * dvp is different for each case). 1014 */ 1015 1016 if (NFS_CMPFH(np, fhp, fhsize)) { 1017 /* 1018 * "." lookup 1019 */ 1020 VREF(dvp); 1021 newvp = dvp; 1022 #ifndef NFS_V2_ONLY 1023 if (v3) { 1024 nfsm_postop_attr(newvp, attrflag, 0); 1025 nfsm_postop_attr(dvp, attrflag, 0); 1026 } else 1027 #endif 1028 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1029 } else if (flags & ISDOTDOT) { 1030 /* 1031 * ".." lookup 1032 */ 1033 VOP_UNLOCK(dvp, 0); 1034 cnp->cn_flags |= PDIRUNLOCK; 1035 1036 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1037 if (error) { 1038 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1039 cnp->cn_flags &= ~PDIRUNLOCK; 1040 m_freem(mrep); 1041 return error; 1042 } 1043 newvp = NFSTOV(np); 1044 1045 #ifndef NFS_V2_ONLY 1046 if (v3) { 1047 nfsm_postop_attr(newvp, attrflag, 0); 1048 nfsm_postop_attr(dvp, attrflag, 0); 1049 } else 1050 #endif 1051 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1052 1053 if (lockparent && (flags & ISLASTCN)) { 1054 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1055 m_freem(mrep); 1056 vput(newvp); 1057 return error; 1058 } 1059 cnp->cn_flags &= ~PDIRUNLOCK; 1060 } 1061 } else { 1062 /* 1063 * Other lookups. 1064 */ 1065 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1066 if (error) { 1067 m_freem(mrep); 1068 return error; 1069 } 1070 newvp = NFSTOV(np); 1071 #ifndef NFS_V2_ONLY 1072 if (v3) { 1073 nfsm_postop_attr(newvp, attrflag, 0); 1074 nfsm_postop_attr(dvp, attrflag, 0); 1075 } else 1076 #endif 1077 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1078 if (!lockparent || !(flags & ISLASTCN)) { 1079 VOP_UNLOCK(dvp, 0); 1080 cnp->cn_flags |= PDIRUNLOCK; 1081 } 1082 } 1083 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1084 cnp->cn_flags |= SAVENAME; 1085 if ((cnp->cn_flags & MAKEENTRY) && 1086 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1087 nfs_cache_enter(dvp, newvp, cnp); 1088 } 1089 *vpp = newvp; 1090 nfsm_reqdone; 1091 if (error) { 1092 /* 1093 * We get here only because of errors returned by 1094 * the RPC. Otherwise we'll have returned above 1095 * (the nfsm_* macros will jump to nfsm_reqdone 1096 * on error). 1097 */ 1098 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1099 cnp->cn_nameiop != CREATE) { 1100 nfs_cache_enter(dvp, NULL, cnp); 1101 } 1102 if (newvp != NULLVP) { 1103 vrele(newvp); 1104 if (newvp != dvp) 1105 VOP_UNLOCK(newvp, 0); 1106 } 1107 noentry: 1108 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1109 (flags & ISLASTCN) && error == ENOENT) { 1110 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1111 error = EROFS; 1112 } else { 1113 error = EJUSTRETURN; 1114 cnp->cn_flags |= SAVENAME; 1115 } 1116 } 1117 *vpp = NULL; 1118 return error; 1119 } 1120 1121 validate: 1122 /* 1123 * make sure we have valid type and size. 1124 */ 1125 1126 newvp = *vpp; 1127 if (newvp->v_type == VNON) { 1128 struct vattr vattr; /* dummy */ 1129 1130 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1131 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp); 1132 if (error) { 1133 vput(newvp); 1134 *vpp = NULL; 1135 } 1136 } 1137 1138 return error; 1139 } 1140 1141 /* 1142 * nfs read call. 1143 * Just call nfs_bioread() to do the work. 1144 */ 1145 int 1146 nfs_read(v) 1147 void *v; 1148 { 1149 struct vop_read_args /* { 1150 struct vnode *a_vp; 1151 struct uio *a_uio; 1152 int a_ioflag; 1153 kauth_cred_t a_cred; 1154 } */ *ap = v; 1155 struct vnode *vp = ap->a_vp; 1156 1157 if (vp->v_type != VREG) 1158 return EISDIR; 1159 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1160 } 1161 1162 /* 1163 * nfs readlink call 1164 */ 1165 int 1166 nfs_readlink(v) 1167 void *v; 1168 { 1169 struct vop_readlink_args /* { 1170 struct vnode *a_vp; 1171 struct uio *a_uio; 1172 kauth_cred_t a_cred; 1173 } */ *ap = v; 1174 struct vnode *vp = ap->a_vp; 1175 struct nfsnode *np = VTONFS(vp); 1176 1177 if (vp->v_type != VLNK) 1178 return (EPERM); 1179 1180 if (np->n_rcred != NULL) { 1181 kauth_cred_free(np->n_rcred); 1182 } 1183 np->n_rcred = ap->a_cred; 1184 kauth_cred_hold(np->n_rcred); 1185 1186 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1187 } 1188 1189 /* 1190 * Do a readlink rpc. 1191 * Called by nfs_doio() from below the buffer cache. 1192 */ 1193 int 1194 nfs_readlinkrpc(vp, uiop, cred) 1195 struct vnode *vp; 1196 struct uio *uiop; 1197 kauth_cred_t cred; 1198 { 1199 u_int32_t *tl; 1200 caddr_t cp; 1201 int32_t t1, t2; 1202 caddr_t bpos, dpos, cp2; 1203 int error = 0; 1204 uint32_t len; 1205 struct mbuf *mreq, *mrep, *md, *mb; 1206 const int v3 = NFS_ISV3(vp); 1207 struct nfsnode *np = VTONFS(vp); 1208 #ifndef NFS_V2_ONLY 1209 int attrflag; 1210 #endif 1211 1212 nfsstats.rpccnt[NFSPROC_READLINK]++; 1213 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1214 nfsm_fhtom(np, v3); 1215 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1216 #ifndef NFS_V2_ONLY 1217 if (v3) 1218 nfsm_postop_attr(vp, attrflag, 0); 1219 #endif 1220 if (!error) { 1221 #ifndef NFS_V2_ONLY 1222 if (v3) { 1223 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1224 len = fxdr_unsigned(uint32_t, *tl); 1225 if (len > MAXPATHLEN) { 1226 /* 1227 * this pathname is too long for us. 1228 */ 1229 m_freem(mrep); 1230 /* Solaris returns EINVAL. should we follow? */ 1231 error = ENAMETOOLONG; 1232 goto nfsmout; 1233 } 1234 } else 1235 #endif 1236 { 1237 nfsm_strsiz(len, NFS_MAXPATHLEN); 1238 } 1239 nfsm_mtouio(uiop, len); 1240 } 1241 nfsm_reqdone; 1242 return (error); 1243 } 1244 1245 /* 1246 * nfs read rpc call 1247 * Ditto above 1248 */ 1249 int 1250 nfs_readrpc(vp, uiop) 1251 struct vnode *vp; 1252 struct uio *uiop; 1253 { 1254 u_int32_t *tl; 1255 caddr_t cp; 1256 int32_t t1, t2; 1257 caddr_t bpos, dpos, cp2; 1258 struct mbuf *mreq, *mrep, *md, *mb; 1259 struct nfsmount *nmp; 1260 int error = 0, len, retlen, tsiz, eof, byte_count; 1261 const int v3 = NFS_ISV3(vp); 1262 struct nfsnode *np = VTONFS(vp); 1263 #ifndef NFS_V2_ONLY 1264 int attrflag; 1265 #endif 1266 1267 #ifndef nolint 1268 eof = 0; 1269 #endif 1270 nmp = VFSTONFS(vp->v_mount); 1271 tsiz = uiop->uio_resid; 1272 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1273 return (EFBIG); 1274 iostat_busy(nmp->nm_stats); 1275 byte_count = 0; /* count bytes actually transferred */ 1276 while (tsiz > 0) { 1277 nfsstats.rpccnt[NFSPROC_READ]++; 1278 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1279 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1280 nfsm_fhtom(np, v3); 1281 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1282 #ifndef NFS_V2_ONLY 1283 if (v3) { 1284 txdr_hyper(uiop->uio_offset, tl); 1285 *(tl + 2) = txdr_unsigned(len); 1286 } else 1287 #endif 1288 { 1289 *tl++ = txdr_unsigned(uiop->uio_offset); 1290 *tl++ = txdr_unsigned(len); 1291 *tl = 0; 1292 } 1293 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1294 #ifndef NFS_V2_ONLY 1295 if (v3) { 1296 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1297 if (error) { 1298 m_freem(mrep); 1299 goto nfsmout; 1300 } 1301 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1302 eof = fxdr_unsigned(int, *(tl + 1)); 1303 } else 1304 #endif 1305 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1306 nfsm_strsiz(retlen, nmp->nm_rsize); 1307 nfsm_mtouio(uiop, retlen); 1308 m_freem(mrep); 1309 tsiz -= retlen; 1310 byte_count += retlen; 1311 #ifndef NFS_V2_ONLY 1312 if (v3) { 1313 if (eof || retlen == 0) 1314 tsiz = 0; 1315 } else 1316 #endif 1317 if (retlen < len) 1318 tsiz = 0; 1319 } 1320 nfsmout: 1321 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1322 return (error); 1323 } 1324 1325 struct nfs_writerpc_context { 1326 struct simplelock nwc_slock; 1327 volatile int nwc_mbufcount; 1328 }; 1329 1330 /* 1331 * free mbuf used to refer protected pages while write rpc call. 1332 * called at splvm. 1333 */ 1334 static void 1335 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf, size_t size, void *arg) 1336 { 1337 struct nfs_writerpc_context *ctx = arg; 1338 1339 KASSERT(m != NULL); 1340 KASSERT(ctx != NULL); 1341 pool_cache_put(&mbpool_cache, m); 1342 simple_lock(&ctx->nwc_slock); 1343 if (--ctx->nwc_mbufcount == 0) { 1344 wakeup(ctx); 1345 } 1346 simple_unlock(&ctx->nwc_slock); 1347 } 1348 1349 /* 1350 * nfs write call 1351 */ 1352 int 1353 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1354 struct vnode *vp; 1355 struct uio *uiop; 1356 int *iomode; 1357 boolean_t pageprotected; 1358 boolean_t *stalewriteverfp; 1359 { 1360 u_int32_t *tl; 1361 caddr_t cp; 1362 int32_t t1, t2; 1363 caddr_t bpos, dpos; 1364 struct mbuf *mreq, *mrep, *md, *mb; 1365 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1366 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1367 const int v3 = NFS_ISV3(vp); 1368 int committed = NFSV3WRITE_FILESYNC; 1369 struct nfsnode *np = VTONFS(vp); 1370 struct nfs_writerpc_context ctx; 1371 int s, byte_count; 1372 struct lwp *l = NULL; 1373 size_t origresid; 1374 #ifndef NFS_V2_ONLY 1375 caddr_t cp2; 1376 int rlen, commit; 1377 #endif 1378 1379 simple_lock_init(&ctx.nwc_slock); 1380 ctx.nwc_mbufcount = 1; 1381 1382 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1383 panic("writerpc readonly vp %p", vp); 1384 } 1385 1386 #ifdef DIAGNOSTIC 1387 if (uiop->uio_iovcnt != 1) 1388 panic("nfs: writerpc iovcnt > 1"); 1389 #endif 1390 tsiz = uiop->uio_resid; 1391 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1392 return (EFBIG); 1393 if (pageprotected) { 1394 l = curlwp; 1395 PHOLD(l); 1396 } 1397 retry: 1398 origresid = uiop->uio_resid; 1399 KASSERT(origresid == uiop->uio_iov->iov_len); 1400 iostat_busy(nmp->nm_stats); 1401 byte_count = 0; /* count of bytes actually written */ 1402 while (tsiz > 0) { 1403 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1404 uint32_t backup; 1405 boolean_t stalewriteverf = FALSE; 1406 1407 nfsstats.rpccnt[NFSPROC_WRITE]++; 1408 len = min(tsiz, nmp->nm_wsize); 1409 datalen = pageprotected ? 0 : nfsm_rndup(len); 1410 nfsm_reqhead(np, NFSPROC_WRITE, 1411 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1412 nfsm_fhtom(np, v3); 1413 #ifndef NFS_V2_ONLY 1414 if (v3) { 1415 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1416 txdr_hyper(uiop->uio_offset, tl); 1417 tl += 2; 1418 *tl++ = txdr_unsigned(len); 1419 *tl++ = txdr_unsigned(*iomode); 1420 *tl = txdr_unsigned(len); 1421 } else 1422 #endif 1423 { 1424 u_int32_t x; 1425 1426 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1427 /* Set both "begin" and "current" to non-garbage. */ 1428 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1429 *tl++ = x; /* "begin offset" */ 1430 *tl++ = x; /* "current offset" */ 1431 x = txdr_unsigned(len); 1432 *tl++ = x; /* total to this offset */ 1433 *tl = x; /* size of this write */ 1434 1435 } 1436 if (pageprotected) { 1437 /* 1438 * since we know pages can't be modified during i/o, 1439 * no need to copy them for us. 1440 */ 1441 struct mbuf *m; 1442 struct iovec *iovp = uiop->uio_iov; 1443 1444 m = m_get(M_WAIT, MT_DATA); 1445 MCLAIM(m, &nfs_mowner); 1446 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1447 nfs_writerpc_extfree, &ctx); 1448 m->m_flags |= M_EXT_ROMAP; 1449 m->m_len = len; 1450 mb->m_next = m; 1451 /* 1452 * no need to maintain mb and bpos here 1453 * because no one care them later. 1454 */ 1455 #if 0 1456 mb = m; 1457 bpos = mtod(caddr_t, mb) + mb->m_len; 1458 #endif 1459 UIO_ADVANCE(uiop, len); 1460 uiop->uio_offset += len; 1461 s = splvm(); 1462 simple_lock(&ctx.nwc_slock); 1463 ctx.nwc_mbufcount++; 1464 simple_unlock(&ctx.nwc_slock); 1465 splx(s); 1466 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1467 } else { 1468 nfsm_uiotom(uiop, len); 1469 } 1470 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1471 #ifndef NFS_V2_ONLY 1472 if (v3) { 1473 wccflag = NFSV3_WCCCHK; 1474 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1475 if (!error) { 1476 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1477 + NFSX_V3WRITEVERF); 1478 rlen = fxdr_unsigned(int, *tl++); 1479 if (rlen == 0) { 1480 error = NFSERR_IO; 1481 m_freem(mrep); 1482 break; 1483 } else if (rlen < len) { 1484 backup = len - rlen; 1485 UIO_ADVANCE(uiop, -backup); 1486 uiop->uio_offset -= backup; 1487 len = rlen; 1488 } 1489 commit = fxdr_unsigned(int, *tl++); 1490 1491 /* 1492 * Return the lowest committment level 1493 * obtained by any of the RPCs. 1494 */ 1495 if (committed == NFSV3WRITE_FILESYNC) 1496 committed = commit; 1497 else if (committed == NFSV3WRITE_DATASYNC && 1498 commit == NFSV3WRITE_UNSTABLE) 1499 committed = commit; 1500 simple_lock(&nmp->nm_slock); 1501 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1502 memcpy(nmp->nm_writeverf, tl, 1503 NFSX_V3WRITEVERF); 1504 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1505 } else if ((nmp->nm_iflag & 1506 NFSMNT_STALEWRITEVERF) || 1507 memcmp(tl, nmp->nm_writeverf, 1508 NFSX_V3WRITEVERF)) { 1509 memcpy(nmp->nm_writeverf, tl, 1510 NFSX_V3WRITEVERF); 1511 /* 1512 * note NFSMNT_STALEWRITEVERF 1513 * if we're the first thread to 1514 * notice it. 1515 */ 1516 if ((nmp->nm_iflag & 1517 NFSMNT_STALEWRITEVERF) == 0) { 1518 stalewriteverf = TRUE; 1519 nmp->nm_iflag |= 1520 NFSMNT_STALEWRITEVERF; 1521 } 1522 } 1523 simple_unlock(&nmp->nm_slock); 1524 } 1525 } else 1526 #endif 1527 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1528 if (wccflag) 1529 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1530 m_freem(mrep); 1531 if (error) 1532 break; 1533 tsiz -= len; 1534 byte_count += len; 1535 if (stalewriteverf) { 1536 *stalewriteverfp = TRUE; 1537 stalewriteverf = FALSE; 1538 if (committed == NFSV3WRITE_UNSTABLE && 1539 len != origresid) { 1540 /* 1541 * if our write requests weren't atomic but 1542 * unstable, datas in previous iterations 1543 * might have already been lost now. 1544 * then, we should resend them to nfsd. 1545 */ 1546 backup = origresid - tsiz; 1547 UIO_ADVANCE(uiop, -backup); 1548 uiop->uio_offset -= backup; 1549 tsiz = origresid; 1550 goto retry; 1551 } 1552 } 1553 } 1554 nfsmout: 1555 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1556 if (pageprotected) { 1557 /* 1558 * wait until mbufs go away. 1559 * retransmitted mbufs can survive longer than rpc requests 1560 * themselves. 1561 */ 1562 s = splvm(); 1563 simple_lock(&ctx.nwc_slock); 1564 ctx.nwc_mbufcount--; 1565 while (ctx.nwc_mbufcount > 0) { 1566 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1567 } 1568 simple_unlock(&ctx.nwc_slock); 1569 splx(s); 1570 PRELE(l); 1571 } 1572 *iomode = committed; 1573 if (error) 1574 uiop->uio_resid = tsiz; 1575 return (error); 1576 } 1577 1578 /* 1579 * nfs mknod rpc 1580 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1581 * mode set to specify the file type and the size field for rdev. 1582 */ 1583 int 1584 nfs_mknodrpc(dvp, vpp, cnp, vap) 1585 struct vnode *dvp; 1586 struct vnode **vpp; 1587 struct componentname *cnp; 1588 struct vattr *vap; 1589 { 1590 struct nfsv2_sattr *sp; 1591 u_int32_t *tl; 1592 caddr_t cp; 1593 int32_t t1, t2; 1594 struct vnode *newvp = (struct vnode *)0; 1595 struct nfsnode *dnp, *np; 1596 char *cp2; 1597 caddr_t bpos, dpos; 1598 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1599 struct mbuf *mreq, *mrep, *md, *mb; 1600 u_int32_t rdev; 1601 const int v3 = NFS_ISV3(dvp); 1602 1603 if (vap->va_type == VCHR || vap->va_type == VBLK) 1604 rdev = txdr_unsigned(vap->va_rdev); 1605 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1606 rdev = nfs_xdrneg1; 1607 else { 1608 VOP_ABORTOP(dvp, cnp); 1609 vput(dvp); 1610 return (EOPNOTSUPP); 1611 } 1612 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1613 dnp = VTONFS(dvp); 1614 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1615 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1616 nfsm_fhtom(dnp, v3); 1617 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1618 #ifndef NFS_V2_ONLY 1619 if (v3) { 1620 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1621 *tl++ = vtonfsv3_type(vap->va_type); 1622 nfsm_v3attrbuild(vap, FALSE); 1623 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1624 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1625 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1626 *tl = txdr_unsigned(minor(vap->va_rdev)); 1627 } 1628 } else 1629 #endif 1630 { 1631 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1632 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1633 sp->sa_uid = nfs_xdrneg1; 1634 sp->sa_gid = nfs_xdrneg1; 1635 sp->sa_size = rdev; 1636 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1637 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1638 } 1639 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_lwp, cnp->cn_cred); 1640 if (!error) { 1641 nfsm_mtofh(dvp, newvp, v3, gotvp); 1642 if (!gotvp) { 1643 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1644 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1645 if (!error) 1646 newvp = NFSTOV(np); 1647 } 1648 } 1649 #ifndef NFS_V2_ONLY 1650 if (v3) 1651 nfsm_wcc_data(dvp, wccflag, 0, !error); 1652 #endif 1653 nfsm_reqdone; 1654 if (error) { 1655 if (newvp) 1656 vput(newvp); 1657 } else { 1658 if (cnp->cn_flags & MAKEENTRY) 1659 nfs_cache_enter(dvp, newvp, cnp); 1660 *vpp = newvp; 1661 } 1662 PNBUF_PUT(cnp->cn_pnbuf); 1663 VTONFS(dvp)->n_flag |= NMODIFIED; 1664 if (!wccflag) 1665 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1666 vput(dvp); 1667 return (error); 1668 } 1669 1670 /* 1671 * nfs mknod vop 1672 * just call nfs_mknodrpc() to do the work. 1673 */ 1674 /* ARGSUSED */ 1675 int 1676 nfs_mknod(v) 1677 void *v; 1678 { 1679 struct vop_mknod_args /* { 1680 struct vnode *a_dvp; 1681 struct vnode **a_vpp; 1682 struct componentname *a_cnp; 1683 struct vattr *a_vap; 1684 } */ *ap = v; 1685 struct vnode *dvp = ap->a_dvp; 1686 struct componentname *cnp = ap->a_cnp; 1687 int error; 1688 1689 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1690 VN_KNOTE(dvp, NOTE_WRITE); 1691 if (error == 0 || error == EEXIST) 1692 cache_purge1(dvp, cnp, 0); 1693 return (error); 1694 } 1695 1696 #ifndef NFS_V2_ONLY 1697 static u_long create_verf; 1698 #endif 1699 /* 1700 * nfs file create call 1701 */ 1702 int 1703 nfs_create(v) 1704 void *v; 1705 { 1706 struct vop_create_args /* { 1707 struct vnode *a_dvp; 1708 struct vnode **a_vpp; 1709 struct componentname *a_cnp; 1710 struct vattr *a_vap; 1711 } */ *ap = v; 1712 struct vnode *dvp = ap->a_dvp; 1713 struct vattr *vap = ap->a_vap; 1714 struct componentname *cnp = ap->a_cnp; 1715 struct nfsv2_sattr *sp; 1716 u_int32_t *tl; 1717 caddr_t cp; 1718 int32_t t1, t2; 1719 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1720 struct vnode *newvp = (struct vnode *)0; 1721 caddr_t bpos, dpos, cp2; 1722 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1723 struct mbuf *mreq, *mrep, *md, *mb; 1724 const int v3 = NFS_ISV3(dvp); 1725 1726 /* 1727 * Oops, not for me.. 1728 */ 1729 if (vap->va_type == VSOCK) 1730 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1731 1732 KASSERT(vap->va_type == VREG); 1733 1734 #ifdef VA_EXCLUSIVE 1735 if (vap->va_vaflags & VA_EXCLUSIVE) 1736 fmode |= O_EXCL; 1737 #endif 1738 again: 1739 error = 0; 1740 nfsstats.rpccnt[NFSPROC_CREATE]++; 1741 dnp = VTONFS(dvp); 1742 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1743 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1744 nfsm_fhtom(dnp, v3); 1745 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1746 #ifndef NFS_V2_ONLY 1747 if (v3) { 1748 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1749 if (fmode & O_EXCL) { 1750 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1751 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1752 #ifdef INET 1753 if (TAILQ_FIRST(&in_ifaddrhead)) 1754 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1755 ia_addr.sin_addr.s_addr; 1756 else 1757 *tl++ = create_verf; 1758 #else 1759 *tl++ = create_verf; 1760 #endif 1761 *tl = ++create_verf; 1762 } else { 1763 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1764 nfsm_v3attrbuild(vap, FALSE); 1765 } 1766 } else 1767 #endif 1768 { 1769 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1770 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1771 sp->sa_uid = nfs_xdrneg1; 1772 sp->sa_gid = nfs_xdrneg1; 1773 sp->sa_size = 0; 1774 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1775 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1776 } 1777 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_lwp, cnp->cn_cred); 1778 if (!error) { 1779 nfsm_mtofh(dvp, newvp, v3, gotvp); 1780 if (!gotvp) { 1781 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1782 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1783 if (!error) 1784 newvp = NFSTOV(np); 1785 } 1786 } 1787 #ifndef NFS_V2_ONLY 1788 if (v3) 1789 nfsm_wcc_data(dvp, wccflag, 0, !error); 1790 #endif 1791 nfsm_reqdone; 1792 if (error) { 1793 /* 1794 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 1795 */ 1796 if (v3 && (fmode & O_EXCL) && error == ENOTSUP) { 1797 fmode &= ~O_EXCL; 1798 goto again; 1799 } 1800 } else if (v3 && (fmode & O_EXCL)) { 1801 struct timespec ts; 1802 1803 getnanotime(&ts); 1804 1805 /* 1806 * make sure that we'll update timestamps as 1807 * most server implementations use them to store 1808 * the create verifier. 1809 * 1810 * XXX it's better to use TOSERVER always. 1811 */ 1812 1813 if (vap->va_atime.tv_sec == VNOVAL) 1814 vap->va_atime = ts; 1815 if (vap->va_mtime.tv_sec == VNOVAL) 1816 vap->va_mtime = ts; 1817 1818 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_lwp); 1819 } 1820 if (error == 0) { 1821 if (cnp->cn_flags & MAKEENTRY) 1822 nfs_cache_enter(dvp, newvp, cnp); 1823 else 1824 cache_purge1(dvp, cnp, 0); 1825 *ap->a_vpp = newvp; 1826 } else { 1827 if (newvp) 1828 vput(newvp); 1829 if (error == EEXIST) 1830 cache_purge1(dvp, cnp, 0); 1831 } 1832 PNBUF_PUT(cnp->cn_pnbuf); 1833 VTONFS(dvp)->n_flag |= NMODIFIED; 1834 if (!wccflag) 1835 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1836 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1837 vput(dvp); 1838 return (error); 1839 } 1840 1841 /* 1842 * nfs file remove call 1843 * To try and make nfs semantics closer to ufs semantics, a file that has 1844 * other processes using the vnode is renamed instead of removed and then 1845 * removed later on the last close. 1846 * - If v_usecount > 1 1847 * If a rename is not already in the works 1848 * call nfs_sillyrename() to set it up 1849 * else 1850 * do the remove rpc 1851 */ 1852 int 1853 nfs_remove(v) 1854 void *v; 1855 { 1856 struct vop_remove_args /* { 1857 struct vnodeop_desc *a_desc; 1858 struct vnode * a_dvp; 1859 struct vnode * a_vp; 1860 struct componentname * a_cnp; 1861 } */ *ap = v; 1862 struct vnode *vp = ap->a_vp; 1863 struct vnode *dvp = ap->a_dvp; 1864 struct componentname *cnp = ap->a_cnp; 1865 struct nfsnode *np = VTONFS(vp); 1866 int error = 0; 1867 struct vattr vattr; 1868 1869 #ifndef DIAGNOSTIC 1870 if ((cnp->cn_flags & HASBUF) == 0) 1871 panic("nfs_remove: no name"); 1872 if (vp->v_usecount < 1) 1873 panic("nfs_remove: bad v_usecount"); 1874 #endif 1875 if (vp->v_type == VDIR) 1876 error = EPERM; 1877 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1878 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_lwp) == 0 && 1879 vattr.va_nlink > 1)) { 1880 /* 1881 * Purge the name cache so that the chance of a lookup for 1882 * the name succeeding while the remove is in progress is 1883 * minimized. Without node locking it can still happen, such 1884 * that an I/O op returns ESTALE, but since you get this if 1885 * another host removes the file.. 1886 */ 1887 cache_purge(vp); 1888 /* 1889 * throw away biocache buffers, mainly to avoid 1890 * unnecessary delayed writes later. 1891 */ 1892 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_lwp, 1); 1893 /* Do the rpc */ 1894 if (error != EINTR) 1895 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1896 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp); 1897 } else if (!np->n_sillyrename) 1898 error = nfs_sillyrename(dvp, vp, cnp, FALSE); 1899 PNBUF_PUT(cnp->cn_pnbuf); 1900 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1901 vattr.va_nlink == 1) { 1902 np->n_flag |= NREMOVED; 1903 } 1904 NFS_INVALIDATE_ATTRCACHE(np); 1905 VN_KNOTE(vp, NOTE_DELETE); 1906 VN_KNOTE(dvp, NOTE_WRITE); 1907 if (dvp == vp) 1908 vrele(vp); 1909 else 1910 vput(vp); 1911 vput(dvp); 1912 return (error); 1913 } 1914 1915 /* 1916 * nfs file remove rpc called from nfs_inactive 1917 */ 1918 int 1919 nfs_removeit(sp) 1920 struct sillyrename *sp; 1921 { 1922 1923 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1924 (struct lwp *)0)); 1925 } 1926 1927 /* 1928 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1929 */ 1930 int 1931 nfs_removerpc(dvp, name, namelen, cred, l) 1932 struct vnode *dvp; 1933 const char *name; 1934 int namelen; 1935 kauth_cred_t cred; 1936 struct lwp *l; 1937 { 1938 u_int32_t *tl; 1939 caddr_t cp; 1940 #ifndef NFS_V2_ONLY 1941 int32_t t1; 1942 caddr_t cp2; 1943 #endif 1944 int32_t t2; 1945 caddr_t bpos, dpos; 1946 int error = 0, wccflag = NFSV3_WCCRATTR; 1947 struct mbuf *mreq, *mrep, *md, *mb; 1948 const int v3 = NFS_ISV3(dvp); 1949 int rexmit = 0; 1950 struct nfsnode *dnp = VTONFS(dvp); 1951 1952 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1953 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1954 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1955 nfsm_fhtom(dnp, v3); 1956 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1957 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1958 #ifndef NFS_V2_ONLY 1959 if (v3) 1960 nfsm_wcc_data(dvp, wccflag, 0, !error); 1961 #endif 1962 nfsm_reqdone; 1963 VTONFS(dvp)->n_flag |= NMODIFIED; 1964 if (!wccflag) 1965 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1966 /* 1967 * Kludge City: If the first reply to the remove rpc is lost.. 1968 * the reply to the retransmitted request will be ENOENT 1969 * since the file was in fact removed 1970 * Therefore, we cheat and return success. 1971 */ 1972 if (rexmit && error == ENOENT) 1973 error = 0; 1974 return (error); 1975 } 1976 1977 /* 1978 * nfs file rename call 1979 */ 1980 int 1981 nfs_rename(v) 1982 void *v; 1983 { 1984 struct vop_rename_args /* { 1985 struct vnode *a_fdvp; 1986 struct vnode *a_fvp; 1987 struct componentname *a_fcnp; 1988 struct vnode *a_tdvp; 1989 struct vnode *a_tvp; 1990 struct componentname *a_tcnp; 1991 } */ *ap = v; 1992 struct vnode *fvp = ap->a_fvp; 1993 struct vnode *tvp = ap->a_tvp; 1994 struct vnode *fdvp = ap->a_fdvp; 1995 struct vnode *tdvp = ap->a_tdvp; 1996 struct componentname *tcnp = ap->a_tcnp; 1997 struct componentname *fcnp = ap->a_fcnp; 1998 int error; 1999 2000 #ifndef DIAGNOSTIC 2001 if ((tcnp->cn_flags & HASBUF) == 0 || 2002 (fcnp->cn_flags & HASBUF) == 0) 2003 panic("nfs_rename: no name"); 2004 #endif 2005 /* Check for cross-device rename */ 2006 if ((fvp->v_mount != tdvp->v_mount) || 2007 (tvp && (fvp->v_mount != tvp->v_mount))) { 2008 error = EXDEV; 2009 goto out; 2010 } 2011 2012 /* 2013 * If the tvp exists and is in use, sillyrename it before doing the 2014 * rename of the new file over it. 2015 * 2016 * Have sillyrename use link instead of rename if possible, 2017 * so that we don't lose the file if the rename fails, and so 2018 * that there's no window when the "to" file doesn't exist. 2019 */ 2020 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 2021 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, TRUE)) { 2022 VN_KNOTE(tvp, NOTE_DELETE); 2023 vput(tvp); 2024 tvp = NULL; 2025 } 2026 2027 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2028 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2029 tcnp->cn_lwp); 2030 2031 VN_KNOTE(fdvp, NOTE_WRITE); 2032 VN_KNOTE(tdvp, NOTE_WRITE); 2033 if (error == 0 || error == EEXIST) { 2034 if (fvp->v_type == VDIR) 2035 cache_purge(fvp); 2036 else 2037 cache_purge1(fdvp, fcnp, 0); 2038 if (tvp != NULL && tvp->v_type == VDIR) 2039 cache_purge(tvp); 2040 else 2041 cache_purge1(tdvp, tcnp, 0); 2042 } 2043 out: 2044 if (tdvp == tvp) 2045 vrele(tdvp); 2046 else 2047 vput(tdvp); 2048 if (tvp) 2049 vput(tvp); 2050 vrele(fdvp); 2051 vrele(fvp); 2052 return (error); 2053 } 2054 2055 /* 2056 * nfs file rename rpc called from nfs_remove() above 2057 */ 2058 int 2059 nfs_renameit(sdvp, scnp, sp) 2060 struct vnode *sdvp; 2061 struct componentname *scnp; 2062 struct sillyrename *sp; 2063 { 2064 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2065 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_lwp)); 2066 } 2067 2068 /* 2069 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2070 */ 2071 int 2072 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2073 struct vnode *fdvp; 2074 const char *fnameptr; 2075 int fnamelen; 2076 struct vnode *tdvp; 2077 const char *tnameptr; 2078 int tnamelen; 2079 kauth_cred_t cred; 2080 struct lwp *l; 2081 { 2082 u_int32_t *tl; 2083 caddr_t cp; 2084 #ifndef NFS_V2_ONLY 2085 int32_t t1; 2086 caddr_t cp2; 2087 #endif 2088 int32_t t2; 2089 caddr_t bpos, dpos; 2090 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2091 struct mbuf *mreq, *mrep, *md, *mb; 2092 const int v3 = NFS_ISV3(fdvp); 2093 int rexmit = 0; 2094 struct nfsnode *fdnp = VTONFS(fdvp); 2095 2096 nfsstats.rpccnt[NFSPROC_RENAME]++; 2097 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2098 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2099 nfsm_rndup(tnamelen)); 2100 nfsm_fhtom(fdnp, v3); 2101 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2102 nfsm_fhtom(VTONFS(tdvp), v3); 2103 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2104 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2105 #ifndef NFS_V2_ONLY 2106 if (v3) { 2107 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2108 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2109 } 2110 #endif 2111 nfsm_reqdone; 2112 VTONFS(fdvp)->n_flag |= NMODIFIED; 2113 VTONFS(tdvp)->n_flag |= NMODIFIED; 2114 if (!fwccflag) 2115 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2116 if (!twccflag) 2117 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2118 /* 2119 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2120 */ 2121 if (rexmit && error == ENOENT) 2122 error = 0; 2123 return (error); 2124 } 2125 2126 /* 2127 * NFS link RPC, called from nfs_link. 2128 * Assumes dvp and vp locked, and leaves them that way. 2129 */ 2130 2131 static int 2132 nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, 2133 size_t namelen, kauth_cred_t cred, struct lwp *l) 2134 { 2135 u_int32_t *tl; 2136 caddr_t cp; 2137 #ifndef NFS_V2_ONLY 2138 int32_t t1; 2139 caddr_t cp2; 2140 #endif 2141 int32_t t2; 2142 caddr_t bpos, dpos; 2143 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2144 struct mbuf *mreq, *mrep, *md, *mb; 2145 const int v3 = NFS_ISV3(dvp); 2146 int rexmit = 0; 2147 struct nfsnode *np = VTONFS(vp); 2148 2149 nfsstats.rpccnt[NFSPROC_LINK]++; 2150 nfsm_reqhead(np, NFSPROC_LINK, 2151 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); 2152 nfsm_fhtom(np, v3); 2153 nfsm_fhtom(VTONFS(dvp), v3); 2154 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 2155 nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); 2156 #ifndef NFS_V2_ONLY 2157 if (v3) { 2158 nfsm_postop_attr(vp, attrflag, 0); 2159 nfsm_wcc_data(dvp, wccflag, 0, !error); 2160 } 2161 #endif 2162 nfsm_reqdone; 2163 2164 VTONFS(dvp)->n_flag |= NMODIFIED; 2165 if (!attrflag) 2166 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2167 if (!wccflag) 2168 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2169 2170 /* 2171 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2172 */ 2173 if (rexmit && error == EEXIST) 2174 error = 0; 2175 2176 return error; 2177 } 2178 2179 /* 2180 * nfs hard link create call 2181 */ 2182 int 2183 nfs_link(v) 2184 void *v; 2185 { 2186 struct vop_link_args /* { 2187 struct vnode *a_dvp; 2188 struct vnode *a_vp; 2189 struct componentname *a_cnp; 2190 } */ *ap = v; 2191 struct vnode *vp = ap->a_vp; 2192 struct vnode *dvp = ap->a_dvp; 2193 struct componentname *cnp = ap->a_cnp; 2194 int error = 0; 2195 2196 if (dvp->v_mount != vp->v_mount) { 2197 VOP_ABORTOP(dvp, cnp); 2198 vput(dvp); 2199 return (EXDEV); 2200 } 2201 if (dvp != vp) { 2202 error = vn_lock(vp, LK_EXCLUSIVE); 2203 if (error != 0) { 2204 VOP_ABORTOP(dvp, cnp); 2205 vput(dvp); 2206 return error; 2207 } 2208 } 2209 2210 /* 2211 * Push all writes to the server, so that the attribute cache 2212 * doesn't get "out of sync" with the server. 2213 * XXX There should be a better way! 2214 */ 2215 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_lwp); 2216 2217 error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2218 cnp->cn_cred, cnp->cn_lwp); 2219 2220 if (error == 0) 2221 cache_purge1(dvp, cnp, 0); 2222 PNBUF_PUT(cnp->cn_pnbuf); 2223 if (dvp != vp) 2224 VOP_UNLOCK(vp, 0); 2225 VN_KNOTE(vp, NOTE_LINK); 2226 VN_KNOTE(dvp, NOTE_WRITE); 2227 vput(dvp); 2228 return (error); 2229 } 2230 2231 /* 2232 * nfs symbolic link create call 2233 */ 2234 int 2235 nfs_symlink(v) 2236 void *v; 2237 { 2238 struct vop_symlink_args /* { 2239 struct vnode *a_dvp; 2240 struct vnode **a_vpp; 2241 struct componentname *a_cnp; 2242 struct vattr *a_vap; 2243 char *a_target; 2244 } */ *ap = v; 2245 struct vnode *dvp = ap->a_dvp; 2246 struct vattr *vap = ap->a_vap; 2247 struct componentname *cnp = ap->a_cnp; 2248 struct nfsv2_sattr *sp; 2249 u_int32_t *tl; 2250 caddr_t cp; 2251 int32_t t1, t2; 2252 caddr_t bpos, dpos, cp2; 2253 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2254 struct mbuf *mreq, *mrep, *md, *mb; 2255 struct vnode *newvp = (struct vnode *)0; 2256 const int v3 = NFS_ISV3(dvp); 2257 int rexmit = 0; 2258 struct nfsnode *dnp = VTONFS(dvp); 2259 2260 *ap->a_vpp = NULL; 2261 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2262 slen = strlen(ap->a_target); 2263 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2264 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2265 nfsm_fhtom(dnp, v3); 2266 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2267 #ifndef NFS_V2_ONlY 2268 if (v3) 2269 nfsm_v3attrbuild(vap, FALSE); 2270 #endif 2271 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2272 #ifndef NFS_V2_ONlY 2273 if (!v3) { 2274 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2275 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2276 sp->sa_uid = nfs_xdrneg1; 2277 sp->sa_gid = nfs_xdrneg1; 2278 sp->sa_size = nfs_xdrneg1; 2279 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2280 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2281 } 2282 #endif 2283 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_lwp, cnp->cn_cred, 2284 &rexmit); 2285 #ifndef NFS_V2_ONlY 2286 if (v3) { 2287 if (!error) 2288 nfsm_mtofh(dvp, newvp, v3, gotvp); 2289 nfsm_wcc_data(dvp, wccflag, 0, !error); 2290 } 2291 #endif 2292 nfsm_reqdone; 2293 /* 2294 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2295 */ 2296 if (rexmit && error == EEXIST) 2297 error = 0; 2298 if (error == 0 || error == EEXIST) 2299 cache_purge1(dvp, cnp, 0); 2300 if (error == 0 && newvp == NULL) { 2301 struct nfsnode *np = NULL; 2302 2303 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2304 cnp->cn_cred, cnp->cn_lwp, &np); 2305 if (error == 0) 2306 newvp = NFSTOV(np); 2307 } 2308 if (error) { 2309 if (newvp != NULL) 2310 vput(newvp); 2311 } else { 2312 *ap->a_vpp = newvp; 2313 } 2314 PNBUF_PUT(cnp->cn_pnbuf); 2315 VTONFS(dvp)->n_flag |= NMODIFIED; 2316 if (!wccflag) 2317 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2318 VN_KNOTE(dvp, NOTE_WRITE); 2319 vput(dvp); 2320 return (error); 2321 } 2322 2323 /* 2324 * nfs make dir call 2325 */ 2326 int 2327 nfs_mkdir(v) 2328 void *v; 2329 { 2330 struct vop_mkdir_args /* { 2331 struct vnode *a_dvp; 2332 struct vnode **a_vpp; 2333 struct componentname *a_cnp; 2334 struct vattr *a_vap; 2335 } */ *ap = v; 2336 struct vnode *dvp = ap->a_dvp; 2337 struct vattr *vap = ap->a_vap; 2338 struct componentname *cnp = ap->a_cnp; 2339 struct nfsv2_sattr *sp; 2340 u_int32_t *tl; 2341 caddr_t cp; 2342 int32_t t1, t2; 2343 int len; 2344 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2345 struct vnode *newvp = (struct vnode *)0; 2346 caddr_t bpos, dpos, cp2; 2347 int error = 0, wccflag = NFSV3_WCCRATTR; 2348 int gotvp = 0; 2349 int rexmit = 0; 2350 struct mbuf *mreq, *mrep, *md, *mb; 2351 const int v3 = NFS_ISV3(dvp); 2352 2353 len = cnp->cn_namelen; 2354 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2355 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2356 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2357 nfsm_fhtom(dnp, v3); 2358 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2359 #ifndef NFS_V2_ONLY 2360 if (v3) { 2361 nfsm_v3attrbuild(vap, FALSE); 2362 } else 2363 #endif 2364 { 2365 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2366 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2367 sp->sa_uid = nfs_xdrneg1; 2368 sp->sa_gid = nfs_xdrneg1; 2369 sp->sa_size = nfs_xdrneg1; 2370 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2371 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2372 } 2373 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2374 if (!error) 2375 nfsm_mtofh(dvp, newvp, v3, gotvp); 2376 if (v3) 2377 nfsm_wcc_data(dvp, wccflag, 0, !error); 2378 nfsm_reqdone; 2379 VTONFS(dvp)->n_flag |= NMODIFIED; 2380 if (!wccflag) 2381 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2382 /* 2383 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2384 * if we can succeed in looking up the directory. 2385 */ 2386 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2387 if (newvp) { 2388 vput(newvp); 2389 newvp = (struct vnode *)0; 2390 } 2391 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2392 cnp->cn_lwp, &np); 2393 if (!error) { 2394 newvp = NFSTOV(np); 2395 if (newvp->v_type != VDIR || newvp == dvp) 2396 error = EEXIST; 2397 } 2398 } 2399 if (error) { 2400 if (newvp) { 2401 if (dvp != newvp) 2402 vput(newvp); 2403 else 2404 vrele(newvp); 2405 } 2406 } else { 2407 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2408 if (cnp->cn_flags & MAKEENTRY) 2409 nfs_cache_enter(dvp, newvp, cnp); 2410 *ap->a_vpp = newvp; 2411 } 2412 PNBUF_PUT(cnp->cn_pnbuf); 2413 vput(dvp); 2414 return (error); 2415 } 2416 2417 /* 2418 * nfs remove directory call 2419 */ 2420 int 2421 nfs_rmdir(v) 2422 void *v; 2423 { 2424 struct vop_rmdir_args /* { 2425 struct vnode *a_dvp; 2426 struct vnode *a_vp; 2427 struct componentname *a_cnp; 2428 } */ *ap = v; 2429 struct vnode *vp = ap->a_vp; 2430 struct vnode *dvp = ap->a_dvp; 2431 struct componentname *cnp = ap->a_cnp; 2432 u_int32_t *tl; 2433 caddr_t cp; 2434 #ifndef NFS_V2_ONLY 2435 int32_t t1; 2436 caddr_t cp2; 2437 #endif 2438 int32_t t2; 2439 caddr_t bpos, dpos; 2440 int error = 0, wccflag = NFSV3_WCCRATTR; 2441 int rexmit = 0; 2442 struct mbuf *mreq, *mrep, *md, *mb; 2443 const int v3 = NFS_ISV3(dvp); 2444 struct nfsnode *dnp; 2445 2446 if (dvp == vp) { 2447 vrele(dvp); 2448 vput(dvp); 2449 PNBUF_PUT(cnp->cn_pnbuf); 2450 return (EINVAL); 2451 } 2452 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2453 dnp = VTONFS(dvp); 2454 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2455 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2456 nfsm_fhtom(dnp, v3); 2457 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2458 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2459 #ifndef NFS_V2_ONLY 2460 if (v3) 2461 nfsm_wcc_data(dvp, wccflag, 0, !error); 2462 #endif 2463 nfsm_reqdone; 2464 PNBUF_PUT(cnp->cn_pnbuf); 2465 VTONFS(dvp)->n_flag |= NMODIFIED; 2466 if (!wccflag) 2467 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2468 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2469 VN_KNOTE(vp, NOTE_DELETE); 2470 cache_purge(vp); 2471 vput(vp); 2472 vput(dvp); 2473 /* 2474 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2475 */ 2476 if (rexmit && error == ENOENT) 2477 error = 0; 2478 return (error); 2479 } 2480 2481 /* 2482 * nfs readdir call 2483 */ 2484 int 2485 nfs_readdir(v) 2486 void *v; 2487 { 2488 struct vop_readdir_args /* { 2489 struct vnode *a_vp; 2490 struct uio *a_uio; 2491 kauth_cred_t a_cred; 2492 int *a_eofflag; 2493 off_t **a_cookies; 2494 int *a_ncookies; 2495 } */ *ap = v; 2496 struct vnode *vp = ap->a_vp; 2497 struct uio *uio = ap->a_uio; 2498 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2499 char *base = uio->uio_iov->iov_base; 2500 int tresid, error; 2501 size_t count, lost; 2502 struct dirent *dp; 2503 off_t *cookies = NULL; 2504 int ncookies = 0, nc; 2505 2506 if (vp->v_type != VDIR) 2507 return (EPERM); 2508 2509 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2510 count = uio->uio_resid - lost; 2511 if (count <= 0) 2512 return (EINVAL); 2513 2514 /* 2515 * Call nfs_bioread() to do the real work. 2516 */ 2517 tresid = uio->uio_resid = count; 2518 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2519 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2520 2521 if (!error && ap->a_cookies) { 2522 ncookies = count / 16; 2523 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2524 *ap->a_cookies = cookies; 2525 } 2526 2527 if (!error && uio->uio_resid == tresid) { 2528 uio->uio_resid += lost; 2529 nfsstats.direofcache_misses++; 2530 if (ap->a_cookies) 2531 *ap->a_ncookies = 0; 2532 *ap->a_eofflag = 1; 2533 return (0); 2534 } 2535 2536 if (!error && ap->a_cookies) { 2537 /* 2538 * Only the NFS server and emulations use cookies, and they 2539 * load the directory block into system space, so we can 2540 * just look at it directly. 2541 */ 2542 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2543 uio->uio_iovcnt != 1) 2544 panic("nfs_readdir: lost in space"); 2545 for (nc = 0; ncookies-- && 2546 base < (char *)uio->uio_iov->iov_base; nc++){ 2547 dp = (struct dirent *) base; 2548 if (dp->d_reclen == 0) 2549 break; 2550 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2551 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2552 else 2553 *(cookies++) = NFS_GETCOOKIE(dp); 2554 base += dp->d_reclen; 2555 } 2556 uio->uio_resid += 2557 ((caddr_t)uio->uio_iov->iov_base - base); 2558 uio->uio_iov->iov_len += 2559 ((caddr_t)uio->uio_iov->iov_base - base); 2560 uio->uio_iov->iov_base = base; 2561 *ap->a_ncookies = nc; 2562 } 2563 2564 uio->uio_resid += lost; 2565 *ap->a_eofflag = 0; 2566 return (error); 2567 } 2568 2569 /* 2570 * Readdir rpc call. 2571 * Called from below the buffer cache by nfs_doio(). 2572 */ 2573 int 2574 nfs_readdirrpc(vp, uiop, cred) 2575 struct vnode *vp; 2576 struct uio *uiop; 2577 kauth_cred_t cred; 2578 { 2579 int len, left; 2580 struct dirent *dp = NULL; 2581 u_int32_t *tl; 2582 caddr_t cp; 2583 int32_t t1, t2; 2584 caddr_t bpos, dpos, cp2; 2585 struct mbuf *mreq, *mrep, *md, *mb; 2586 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2587 struct nfsnode *dnp = VTONFS(vp); 2588 u_quad_t fileno; 2589 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2590 #ifndef NFS_V2_ONLY 2591 int attrflag; 2592 #endif 2593 int nrpcs = 0, reclen; 2594 const int v3 = NFS_ISV3(vp); 2595 2596 #ifdef DIAGNOSTIC 2597 /* 2598 * Should be called from buffer cache, so only amount of 2599 * NFS_DIRBLKSIZ will be requested. 2600 */ 2601 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2602 panic("nfs readdirrpc bad uio"); 2603 #endif 2604 2605 /* 2606 * Loop around doing readdir rpc's of size nm_readdirsize 2607 * truncated to a multiple of NFS_DIRFRAGSIZ. 2608 * The stopping criteria is EOF or buffer full. 2609 */ 2610 while (more_dirs && bigenough) { 2611 /* 2612 * Heuristic: don't bother to do another RPC to further 2613 * fill up this block if there is not much room left. (< 50% 2614 * of the readdir RPC size). This wastes some buffer space 2615 * but can save up to 50% in RPC calls. 2616 */ 2617 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2618 bigenough = 0; 2619 break; 2620 } 2621 nfsstats.rpccnt[NFSPROC_READDIR]++; 2622 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2623 NFSX_READDIR(v3)); 2624 nfsm_fhtom(dnp, v3); 2625 #ifndef NFS_V2_ONLY 2626 if (v3) { 2627 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2628 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2629 txdr_swapcookie3(uiop->uio_offset, tl); 2630 } else { 2631 txdr_cookie3(uiop->uio_offset, tl); 2632 } 2633 tl += 2; 2634 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2635 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2636 } else 2637 #endif 2638 { 2639 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2640 *tl++ = txdr_unsigned(uiop->uio_offset); 2641 } 2642 *tl = txdr_unsigned(nmp->nm_readdirsize); 2643 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2644 nrpcs++; 2645 #ifndef NFS_V2_ONLY 2646 if (v3) { 2647 nfsm_postop_attr(vp, attrflag, 0); 2648 if (!error) { 2649 nfsm_dissect(tl, u_int32_t *, 2650 2 * NFSX_UNSIGNED); 2651 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2652 dnp->n_cookieverf.nfsuquad[1] = *tl; 2653 } else { 2654 m_freem(mrep); 2655 goto nfsmout; 2656 } 2657 } 2658 #endif 2659 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2660 more_dirs = fxdr_unsigned(int, *tl); 2661 2662 /* loop thru the dir entries, doctoring them to 4bsd form */ 2663 while (more_dirs && bigenough) { 2664 #ifndef NFS_V2_ONLY 2665 if (v3) { 2666 nfsm_dissect(tl, u_int32_t *, 2667 3 * NFSX_UNSIGNED); 2668 fileno = fxdr_hyper(tl); 2669 len = fxdr_unsigned(int, *(tl + 2)); 2670 } else 2671 #endif 2672 { 2673 nfsm_dissect(tl, u_int32_t *, 2674 2 * NFSX_UNSIGNED); 2675 fileno = fxdr_unsigned(u_quad_t, *tl++); 2676 len = fxdr_unsigned(int, *tl); 2677 } 2678 if (len <= 0 || len > NFS_MAXNAMLEN) { 2679 error = EBADRPC; 2680 m_freem(mrep); 2681 goto nfsmout; 2682 } 2683 /* for cookie stashing */ 2684 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2685 left = NFS_DIRFRAGSIZ - blksiz; 2686 if (reclen > left) { 2687 memset(uiop->uio_iov->iov_base, 0, left); 2688 dp->d_reclen += left; 2689 UIO_ADVANCE(uiop, left); 2690 blksiz = 0; 2691 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2692 } 2693 if (reclen > uiop->uio_resid) 2694 bigenough = 0; 2695 if (bigenough) { 2696 int tlen; 2697 2698 dp = (struct dirent *)uiop->uio_iov->iov_base; 2699 dp->d_fileno = fileno; 2700 dp->d_namlen = len; 2701 dp->d_reclen = reclen; 2702 dp->d_type = DT_UNKNOWN; 2703 blksiz += reclen; 2704 if (blksiz == NFS_DIRFRAGSIZ) 2705 blksiz = 0; 2706 UIO_ADVANCE(uiop, DIRHDSIZ); 2707 nfsm_mtouio(uiop, len); 2708 tlen = reclen - (DIRHDSIZ + len); 2709 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2710 UIO_ADVANCE(uiop, tlen); 2711 } else 2712 nfsm_adv(nfsm_rndup(len)); 2713 #ifndef NFS_V2_ONLY 2714 if (v3) { 2715 nfsm_dissect(tl, u_int32_t *, 2716 3 * NFSX_UNSIGNED); 2717 } else 2718 #endif 2719 { 2720 nfsm_dissect(tl, u_int32_t *, 2721 2 * NFSX_UNSIGNED); 2722 } 2723 if (bigenough) { 2724 #ifndef NFS_V2_ONLY 2725 if (v3) { 2726 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2727 uiop->uio_offset = 2728 fxdr_swapcookie3(tl); 2729 else 2730 uiop->uio_offset = 2731 fxdr_cookie3(tl); 2732 } 2733 else 2734 #endif 2735 { 2736 uiop->uio_offset = 2737 fxdr_unsigned(off_t, *tl); 2738 } 2739 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2740 } 2741 if (v3) 2742 tl += 2; 2743 else 2744 tl++; 2745 more_dirs = fxdr_unsigned(int, *tl); 2746 } 2747 /* 2748 * If at end of rpc data, get the eof boolean 2749 */ 2750 if (!more_dirs) { 2751 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2752 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2753 2754 /* 2755 * kludge: if we got no entries, treat it as EOF. 2756 * some server sometimes send a reply without any 2757 * entries or EOF. 2758 * although it might mean the server has very long name, 2759 * we can't handle such entries anyway. 2760 */ 2761 2762 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2763 more_dirs = 0; 2764 } 2765 m_freem(mrep); 2766 } 2767 /* 2768 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2769 * by increasing d_reclen for the last record. 2770 */ 2771 if (blksiz > 0) { 2772 left = NFS_DIRFRAGSIZ - blksiz; 2773 memset(uiop->uio_iov->iov_base, 0, left); 2774 dp->d_reclen += left; 2775 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2776 UIO_ADVANCE(uiop, left); 2777 } 2778 2779 /* 2780 * We are now either at the end of the directory or have filled the 2781 * block. 2782 */ 2783 if (bigenough) { 2784 dnp->n_direofoffset = uiop->uio_offset; 2785 dnp->n_flag |= NEOFVALID; 2786 } 2787 nfsmout: 2788 return (error); 2789 } 2790 2791 #ifndef NFS_V2_ONLY 2792 /* 2793 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2794 */ 2795 int 2796 nfs_readdirplusrpc(vp, uiop, cred) 2797 struct vnode *vp; 2798 struct uio *uiop; 2799 kauth_cred_t cred; 2800 { 2801 int len, left; 2802 struct dirent *dp = NULL; 2803 u_int32_t *tl; 2804 caddr_t cp; 2805 int32_t t1, t2; 2806 struct vnode *newvp; 2807 caddr_t bpos, dpos, cp2; 2808 struct mbuf *mreq, *mrep, *md, *mb; 2809 struct nameidata nami, *ndp = &nami; 2810 struct componentname *cnp = &ndp->ni_cnd; 2811 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2812 struct nfsnode *dnp = VTONFS(vp), *np; 2813 nfsfh_t *fhp; 2814 u_quad_t fileno; 2815 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2816 int attrflag, fhsize, nrpcs = 0, reclen; 2817 struct nfs_fattr fattr, *fp; 2818 2819 #ifdef DIAGNOSTIC 2820 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2821 panic("nfs readdirplusrpc bad uio"); 2822 #endif 2823 ndp->ni_dvp = vp; 2824 newvp = NULLVP; 2825 2826 /* 2827 * Loop around doing readdir rpc's of size nm_readdirsize 2828 * truncated to a multiple of NFS_DIRFRAGSIZ. 2829 * The stopping criteria is EOF or buffer full. 2830 */ 2831 while (more_dirs && bigenough) { 2832 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2833 bigenough = 0; 2834 break; 2835 } 2836 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2837 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2838 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2839 nfsm_fhtom(dnp, 1); 2840 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2841 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2842 txdr_swapcookie3(uiop->uio_offset, tl); 2843 } else { 2844 txdr_cookie3(uiop->uio_offset, tl); 2845 } 2846 tl += 2; 2847 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2848 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2849 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2850 *tl = txdr_unsigned(nmp->nm_rsize); 2851 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2852 nfsm_postop_attr(vp, attrflag, 0); 2853 if (error) { 2854 m_freem(mrep); 2855 goto nfsmout; 2856 } 2857 nrpcs++; 2858 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2859 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2860 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2861 more_dirs = fxdr_unsigned(int, *tl); 2862 2863 /* loop thru the dir entries, doctoring them to 4bsd form */ 2864 while (more_dirs && bigenough) { 2865 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2866 fileno = fxdr_hyper(tl); 2867 len = fxdr_unsigned(int, *(tl + 2)); 2868 if (len <= 0 || len > NFS_MAXNAMLEN) { 2869 error = EBADRPC; 2870 m_freem(mrep); 2871 goto nfsmout; 2872 } 2873 /* for cookie stashing */ 2874 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2875 left = NFS_DIRFRAGSIZ - blksiz; 2876 if (reclen > left) { 2877 /* 2878 * DIRFRAGSIZ is aligned, no need to align 2879 * again here. 2880 */ 2881 memset(uiop->uio_iov->iov_base, 0, left); 2882 dp->d_reclen += left; 2883 UIO_ADVANCE(uiop, left); 2884 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2885 blksiz = 0; 2886 } 2887 if (reclen > uiop->uio_resid) 2888 bigenough = 0; 2889 if (bigenough) { 2890 int tlen; 2891 2892 dp = (struct dirent *)uiop->uio_iov->iov_base; 2893 dp->d_fileno = fileno; 2894 dp->d_namlen = len; 2895 dp->d_reclen = reclen; 2896 dp->d_type = DT_UNKNOWN; 2897 blksiz += reclen; 2898 if (blksiz == NFS_DIRFRAGSIZ) 2899 blksiz = 0; 2900 UIO_ADVANCE(uiop, DIRHDSIZ); 2901 nfsm_mtouio(uiop, len); 2902 tlen = reclen - (DIRHDSIZ + len); 2903 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2904 UIO_ADVANCE(uiop, tlen); 2905 cnp->cn_nameptr = dp->d_name; 2906 cnp->cn_namelen = dp->d_namlen; 2907 } else 2908 nfsm_adv(nfsm_rndup(len)); 2909 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2910 if (bigenough) { 2911 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2912 uiop->uio_offset = 2913 fxdr_swapcookie3(tl); 2914 else 2915 uiop->uio_offset = 2916 fxdr_cookie3(tl); 2917 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2918 } 2919 tl += 2; 2920 2921 /* 2922 * Since the attributes are before the file handle 2923 * (sigh), we must skip over the attributes and then 2924 * come back and get them. 2925 */ 2926 attrflag = fxdr_unsigned(int, *tl); 2927 if (attrflag) { 2928 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2929 memcpy(&fattr, fp, NFSX_V3FATTR); 2930 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2931 doit = fxdr_unsigned(int, *tl); 2932 if (doit) { 2933 nfsm_getfh(fhp, fhsize, 1); 2934 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2935 VREF(vp); 2936 newvp = vp; 2937 np = dnp; 2938 } else { 2939 error = nfs_nget1(vp->v_mount, fhp, 2940 fhsize, &np, LK_NOWAIT); 2941 if (!error) 2942 newvp = NFSTOV(np); 2943 } 2944 if (!error) { 2945 const char *xcp; 2946 2947 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2948 if (bigenough) { 2949 dp->d_type = 2950 IFTODT(VTTOIF(np->n_vattr->va_type)); 2951 if (cnp->cn_namelen <= NCHNAMLEN) { 2952 ndp->ni_vp = newvp; 2953 xcp = cnp->cn_nameptr + 2954 cnp->cn_namelen; 2955 cnp->cn_hash = 2956 namei_hash(cnp->cn_nameptr, &xcp); 2957 nfs_cache_enter(ndp->ni_dvp, 2958 ndp->ni_vp, cnp); 2959 } 2960 } 2961 } 2962 error = 0; 2963 } 2964 } else { 2965 /* Just skip over the file handle */ 2966 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2967 i = fxdr_unsigned(int, *tl); 2968 nfsm_adv(nfsm_rndup(i)); 2969 } 2970 if (newvp != NULLVP) { 2971 if (newvp == vp) 2972 vrele(newvp); 2973 else 2974 vput(newvp); 2975 newvp = NULLVP; 2976 } 2977 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2978 more_dirs = fxdr_unsigned(int, *tl); 2979 } 2980 /* 2981 * If at end of rpc data, get the eof boolean 2982 */ 2983 if (!more_dirs) { 2984 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2985 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2986 2987 /* 2988 * kludge: see a comment in nfs_readdirrpc. 2989 */ 2990 2991 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2992 more_dirs = 0; 2993 } 2994 m_freem(mrep); 2995 } 2996 /* 2997 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2998 * by increasing d_reclen for the last record. 2999 */ 3000 if (blksiz > 0) { 3001 left = NFS_DIRFRAGSIZ - blksiz; 3002 memset(uiop->uio_iov->iov_base, 0, left); 3003 dp->d_reclen += left; 3004 NFS_STASHCOOKIE(dp, uiop->uio_offset); 3005 UIO_ADVANCE(uiop, left); 3006 } 3007 3008 /* 3009 * We are now either at the end of the directory or have filled the 3010 * block. 3011 */ 3012 if (bigenough) { 3013 dnp->n_direofoffset = uiop->uio_offset; 3014 dnp->n_flag |= NEOFVALID; 3015 } 3016 nfsmout: 3017 if (newvp != NULLVP) { 3018 if(newvp == vp) 3019 vrele(newvp); 3020 else 3021 vput(newvp); 3022 } 3023 return (error); 3024 } 3025 #endif 3026 3027 /* 3028 * Silly rename. To make the NFS filesystem that is stateless look a little 3029 * more like the "ufs" a remove of an active vnode is translated to a rename 3030 * to a funny looking filename that is removed by nfs_inactive on the 3031 * nfsnode. There is the potential for another process on a different client 3032 * to create the same funny name between the nfs_lookitup() fails and the 3033 * nfs_rename() completes, but... 3034 */ 3035 int 3036 nfs_sillyrename(dvp, vp, cnp, dolink) 3037 struct vnode *dvp, *vp; 3038 struct componentname *cnp; 3039 boolean_t dolink; 3040 { 3041 struct sillyrename *sp; 3042 struct nfsnode *np; 3043 int error; 3044 short pid; 3045 3046 cache_purge(dvp); 3047 np = VTONFS(vp); 3048 #ifndef DIAGNOSTIC 3049 if (vp->v_type == VDIR) 3050 panic("nfs: sillyrename dir"); 3051 #endif 3052 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3053 M_NFSREQ, M_WAITOK); 3054 sp->s_cred = kauth_cred_dup(cnp->cn_cred); 3055 sp->s_dvp = dvp; 3056 VREF(dvp); 3057 3058 /* Fudge together a funny name */ 3059 pid = cnp->cn_lwp->l_proc->p_pid; 3060 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3061 sp->s_namlen = 12; 3062 sp->s_name[8] = hexdigits[pid & 0xf]; 3063 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3064 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3065 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3066 3067 /* Try lookitups until we get one that isn't there */ 3068 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3069 cnp->cn_lwp, (struct nfsnode **)0) == 0) { 3070 sp->s_name[4]++; 3071 if (sp->s_name[4] > 'z') { 3072 error = EINVAL; 3073 goto bad; 3074 } 3075 } 3076 if (dolink) { 3077 error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, 3078 sp->s_cred, cnp->cn_lwp); 3079 /* 3080 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 3081 */ 3082 if (error == ENOTSUP) { 3083 error = nfs_renameit(dvp, cnp, sp); 3084 } 3085 } else { 3086 error = nfs_renameit(dvp, cnp, sp); 3087 } 3088 if (error) 3089 goto bad; 3090 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3091 cnp->cn_lwp, &np); 3092 np->n_sillyrename = sp; 3093 return (0); 3094 bad: 3095 vrele(sp->s_dvp); 3096 kauth_cred_free(sp->s_cred); 3097 free((caddr_t)sp, M_NFSREQ); 3098 return (error); 3099 } 3100 3101 /* 3102 * Look up a file name and optionally either update the file handle or 3103 * allocate an nfsnode, depending on the value of npp. 3104 * npp == NULL --> just do the lookup 3105 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3106 * handled too 3107 * *npp != NULL --> update the file handle in the vnode 3108 */ 3109 int 3110 nfs_lookitup(dvp, name, len, cred, l, npp) 3111 struct vnode *dvp; 3112 const char *name; 3113 int len; 3114 kauth_cred_t cred; 3115 struct lwp *l; 3116 struct nfsnode **npp; 3117 { 3118 u_int32_t *tl; 3119 caddr_t cp; 3120 int32_t t1, t2; 3121 struct vnode *newvp = (struct vnode *)0; 3122 struct nfsnode *np, *dnp = VTONFS(dvp); 3123 caddr_t bpos, dpos, cp2; 3124 int error = 0, fhlen; 3125 #ifndef NFS_V2_ONLY 3126 int attrflag; 3127 #endif 3128 struct mbuf *mreq, *mrep, *md, *mb; 3129 nfsfh_t *nfhp; 3130 const int v3 = NFS_ISV3(dvp); 3131 3132 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3133 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3134 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3135 nfsm_fhtom(dnp, v3); 3136 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3137 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3138 if (npp && !error) { 3139 nfsm_getfh(nfhp, fhlen, v3); 3140 if (*npp) { 3141 np = *npp; 3142 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3143 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3144 np->n_fhp = &np->n_fh; 3145 } 3146 #if NFS_SMALLFH < NFSX_V3FHMAX 3147 else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3148 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3149 #endif 3150 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3151 np->n_fhsize = fhlen; 3152 newvp = NFSTOV(np); 3153 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3154 VREF(dvp); 3155 newvp = dvp; 3156 np = dnp; 3157 } else { 3158 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3159 if (error) { 3160 m_freem(mrep); 3161 return (error); 3162 } 3163 newvp = NFSTOV(np); 3164 } 3165 #ifndef NFS_V2_ONLY 3166 if (v3) { 3167 nfsm_postop_attr(newvp, attrflag, 0); 3168 if (!attrflag && *npp == NULL) { 3169 m_freem(mrep); 3170 vput(newvp); 3171 return (ENOENT); 3172 } 3173 } else 3174 #endif 3175 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3176 } 3177 nfsm_reqdone; 3178 if (npp && *npp == NULL) { 3179 if (error) { 3180 if (newvp) 3181 vput(newvp); 3182 } else 3183 *npp = np; 3184 } 3185 return (error); 3186 } 3187 3188 #ifndef NFS_V2_ONLY 3189 /* 3190 * Nfs Version 3 commit rpc 3191 */ 3192 int 3193 nfs_commit(vp, offset, cnt, l) 3194 struct vnode *vp; 3195 off_t offset; 3196 uint32_t cnt; 3197 struct lwp *l; 3198 { 3199 caddr_t cp; 3200 u_int32_t *tl; 3201 int32_t t1, t2; 3202 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3203 caddr_t bpos, dpos, cp2; 3204 int error = 0, wccflag = NFSV3_WCCRATTR; 3205 struct mbuf *mreq, *mrep, *md, *mb; 3206 struct nfsnode *np; 3207 3208 KASSERT(NFS_ISV3(vp)); 3209 3210 #ifdef NFS_DEBUG_COMMIT 3211 printf("commit %lu - %lu\n", (unsigned long)offset, 3212 (unsigned long)(offset + cnt)); 3213 #endif 3214 3215 simple_lock(&nmp->nm_slock); 3216 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3217 simple_unlock(&nmp->nm_slock); 3218 return (0); 3219 } 3220 simple_unlock(&nmp->nm_slock); 3221 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3222 np = VTONFS(vp); 3223 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3224 nfsm_fhtom(np, 1); 3225 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3226 txdr_hyper(offset, tl); 3227 tl += 2; 3228 *tl = txdr_unsigned(cnt); 3229 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3230 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3231 if (!error) { 3232 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3233 simple_lock(&nmp->nm_slock); 3234 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3235 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3236 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3237 error = NFSERR_STALEWRITEVERF; 3238 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3239 } 3240 simple_unlock(&nmp->nm_slock); 3241 } 3242 nfsm_reqdone; 3243 return (error); 3244 } 3245 #endif 3246 3247 /* 3248 * Kludge City.. 3249 * - make nfs_bmap() essentially a no-op that does no translation 3250 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3251 * (Maybe I could use the process's page mapping, but I was concerned that 3252 * Kernel Write might not be enabled and also figured copyout() would do 3253 * a lot more work than memcpy() and also it currently happens in the 3254 * context of the swapper process (2). 3255 */ 3256 int 3257 nfs_bmap(v) 3258 void *v; 3259 { 3260 struct vop_bmap_args /* { 3261 struct vnode *a_vp; 3262 daddr_t a_bn; 3263 struct vnode **a_vpp; 3264 daddr_t *a_bnp; 3265 int *a_runp; 3266 } */ *ap = v; 3267 struct vnode *vp = ap->a_vp; 3268 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3269 3270 if (ap->a_vpp != NULL) 3271 *ap->a_vpp = vp; 3272 if (ap->a_bnp != NULL) 3273 *ap->a_bnp = ap->a_bn << bshift; 3274 if (ap->a_runp != NULL) 3275 *ap->a_runp = 1024 * 1024; /* XXX */ 3276 return (0); 3277 } 3278 3279 /* 3280 * Strategy routine. 3281 * For async requests when nfsiod(s) are running, queue the request by 3282 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3283 * request. 3284 */ 3285 int 3286 nfs_strategy(v) 3287 void *v; 3288 { 3289 struct vop_strategy_args *ap = v; 3290 struct buf *bp = ap->a_bp; 3291 int error = 0; 3292 3293 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3294 panic("nfs physio/async"); 3295 3296 /* 3297 * If the op is asynchronous and an i/o daemon is waiting 3298 * queue the request, wake it up and wait for completion 3299 * otherwise just do it ourselves. 3300 */ 3301 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3302 error = nfs_doio(bp); 3303 return (error); 3304 } 3305 3306 /* 3307 * fsync vnode op. Just call nfs_flush() with commit == 1. 3308 */ 3309 /* ARGSUSED */ 3310 int 3311 nfs_fsync(v) 3312 void *v; 3313 { 3314 struct vop_fsync_args /* { 3315 struct vnodeop_desc *a_desc; 3316 struct vnode * a_vp; 3317 kauth_cred_t a_cred; 3318 int a_flags; 3319 off_t offlo; 3320 off_t offhi; 3321 struct lwp * a_l; 3322 } */ *ap = v; 3323 3324 struct vnode *vp = ap->a_vp; 3325 3326 if (vp->v_type != VREG) 3327 return 0; 3328 3329 return (nfs_flush(vp, ap->a_cred, 3330 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_l, 1)); 3331 } 3332 3333 /* 3334 * Flush all the data associated with a vnode. 3335 */ 3336 int 3337 nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, 3338 int commit) 3339 { 3340 struct nfsnode *np = VTONFS(vp); 3341 int error; 3342 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3343 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3344 3345 simple_lock(&vp->v_interlock); 3346 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3347 if (np->n_flag & NWRITEERR) { 3348 error = np->n_error; 3349 np->n_flag &= ~NWRITEERR; 3350 } 3351 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3352 return (error); 3353 } 3354 3355 /* 3356 * Return POSIX pathconf information applicable to nfs. 3357 * 3358 * N.B. The NFS V2 protocol doesn't support this RPC. 3359 */ 3360 /* ARGSUSED */ 3361 int 3362 nfs_pathconf(v) 3363 void *v; 3364 { 3365 struct vop_pathconf_args /* { 3366 struct vnode *a_vp; 3367 int a_name; 3368 register_t *a_retval; 3369 } */ *ap = v; 3370 struct nfsv3_pathconf *pcp; 3371 struct vnode *vp = ap->a_vp; 3372 struct mbuf *mreq, *mrep, *md, *mb; 3373 int32_t t1, t2; 3374 u_int32_t *tl; 3375 caddr_t bpos, dpos, cp, cp2; 3376 int error = 0, attrflag; 3377 #ifndef NFS_V2_ONLY 3378 struct nfsmount *nmp; 3379 unsigned int l; 3380 u_int64_t maxsize; 3381 #endif 3382 const int v3 = NFS_ISV3(vp); 3383 struct nfsnode *np = VTONFS(vp); 3384 3385 switch (ap->a_name) { 3386 /* Names that can be resolved locally. */ 3387 case _PC_PIPE_BUF: 3388 *ap->a_retval = PIPE_BUF; 3389 break; 3390 case _PC_SYNC_IO: 3391 *ap->a_retval = 1; 3392 break; 3393 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3394 case _PC_LINK_MAX: 3395 case _PC_NAME_MAX: 3396 case _PC_CHOWN_RESTRICTED: 3397 case _PC_NO_TRUNC: 3398 if (!v3) { 3399 error = EINVAL; 3400 break; 3401 } 3402 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3403 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3404 nfsm_fhtom(np, 1); 3405 nfsm_request(np, NFSPROC_PATHCONF, 3406 curlwp, curlwp->l_cred); /* XXX */ 3407 nfsm_postop_attr(vp, attrflag, 0); 3408 if (!error) { 3409 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3410 NFSX_V3PATHCONF); 3411 switch (ap->a_name) { 3412 case _PC_LINK_MAX: 3413 *ap->a_retval = 3414 fxdr_unsigned(register_t, pcp->pc_linkmax); 3415 break; 3416 case _PC_NAME_MAX: 3417 *ap->a_retval = 3418 fxdr_unsigned(register_t, pcp->pc_namemax); 3419 break; 3420 case _PC_CHOWN_RESTRICTED: 3421 *ap->a_retval = 3422 (pcp->pc_chownrestricted == nfs_true); 3423 break; 3424 case _PC_NO_TRUNC: 3425 *ap->a_retval = 3426 (pcp->pc_notrunc == nfs_true); 3427 break; 3428 } 3429 } 3430 nfsm_reqdone; 3431 break; 3432 case _PC_FILESIZEBITS: 3433 #ifndef NFS_V2_ONLY 3434 if (v3) { 3435 nmp = VFSTONFS(vp->v_mount); 3436 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3437 if ((error = nfs_fsinfo(nmp, vp, 3438 curlwp->l_cred, curlwp)) != 0) /* XXX */ 3439 break; 3440 for (l = 0, maxsize = nmp->nm_maxfilesize; 3441 (maxsize >> l) > 0; l++) 3442 ; 3443 *ap->a_retval = l + 1; 3444 } else 3445 #endif 3446 { 3447 *ap->a_retval = 32; /* NFS V2 limitation */ 3448 } 3449 break; 3450 default: 3451 error = EINVAL; 3452 break; 3453 } 3454 3455 return (error); 3456 } 3457 3458 /* 3459 * NFS advisory byte-level locks. 3460 */ 3461 int 3462 nfs_advlock(v) 3463 void *v; 3464 { 3465 struct vop_advlock_args /* { 3466 struct vnode *a_vp; 3467 caddr_t a_id; 3468 int a_op; 3469 struct flock *a_fl; 3470 int a_flags; 3471 } */ *ap = v; 3472 struct nfsnode *np = VTONFS(ap->a_vp); 3473 3474 return lf_advlock(ap, &np->n_lockf, np->n_size); 3475 } 3476 3477 /* 3478 * Print out the contents of an nfsnode. 3479 */ 3480 int 3481 nfs_print(v) 3482 void *v; 3483 { 3484 struct vop_print_args /* { 3485 struct vnode *a_vp; 3486 } */ *ap = v; 3487 struct vnode *vp = ap->a_vp; 3488 struct nfsnode *np = VTONFS(vp); 3489 3490 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3491 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3492 if (vp->v_type == VFIFO) 3493 fifo_printinfo(vp); 3494 printf("\n"); 3495 return (0); 3496 } 3497 3498 /* 3499 * nfs unlock wrapper. 3500 */ 3501 int 3502 nfs_unlock(void *v) 3503 { 3504 struct vop_unlock_args /* { 3505 struct vnode *a_vp; 3506 int a_flags; 3507 } */ *ap = v; 3508 struct vnode *vp = ap->a_vp; 3509 3510 /* 3511 * VOP_UNLOCK can be called by nfs_loadattrcache 3512 * with v_data == 0. 3513 */ 3514 if (VTONFS(vp)) { 3515 nfs_delayedtruncate(vp); 3516 } 3517 3518 return genfs_unlock(v); 3519 } 3520 3521 /* 3522 * nfs special file access vnode op. 3523 * Essentially just get vattr and then imitate iaccess() since the device is 3524 * local to the client. 3525 */ 3526 int 3527 nfsspec_access(v) 3528 void *v; 3529 { 3530 struct vop_access_args /* { 3531 struct vnode *a_vp; 3532 int a_mode; 3533 kauth_cred_t a_cred; 3534 struct lwp *a_l; 3535 } */ *ap = v; 3536 struct vattr va; 3537 struct vnode *vp = ap->a_vp; 3538 int error; 3539 3540 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_l); 3541 if (error) 3542 return (error); 3543 3544 /* 3545 * Disallow write attempts on filesystems mounted read-only; 3546 * unless the file is a socket, fifo, or a block or character 3547 * device resident on the filesystem. 3548 */ 3549 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3550 switch (vp->v_type) { 3551 case VREG: 3552 case VDIR: 3553 case VLNK: 3554 return (EROFS); 3555 default: 3556 break; 3557 } 3558 } 3559 3560 return (vaccess(va.va_type, va.va_mode, 3561 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3562 } 3563 3564 /* 3565 * Read wrapper for special devices. 3566 */ 3567 int 3568 nfsspec_read(v) 3569 void *v; 3570 { 3571 struct vop_read_args /* { 3572 struct vnode *a_vp; 3573 struct uio *a_uio; 3574 int a_ioflag; 3575 kauth_cred_t a_cred; 3576 } */ *ap = v; 3577 struct nfsnode *np = VTONFS(ap->a_vp); 3578 3579 /* 3580 * Set access flag. 3581 */ 3582 np->n_flag |= NACC; 3583 getnanotime(&np->n_atim); 3584 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3585 } 3586 3587 /* 3588 * Write wrapper for special devices. 3589 */ 3590 int 3591 nfsspec_write(v) 3592 void *v; 3593 { 3594 struct vop_write_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 update flag. 3604 */ 3605 np->n_flag |= NUPD; 3606 getnanotime(&np->n_mtim); 3607 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3608 } 3609 3610 /* 3611 * Close wrapper for special devices. 3612 * 3613 * Update the times on the nfsnode then do device close. 3614 */ 3615 int 3616 nfsspec_close(v) 3617 void *v; 3618 { 3619 struct vop_close_args /* { 3620 struct vnode *a_vp; 3621 int a_fflag; 3622 kauth_cred_t a_cred; 3623 struct lwp *a_l; 3624 } */ *ap = v; 3625 struct vnode *vp = ap->a_vp; 3626 struct nfsnode *np = VTONFS(vp); 3627 struct vattr vattr; 3628 3629 if (np->n_flag & (NACC | NUPD)) { 3630 np->n_flag |= NCHG; 3631 if (vp->v_usecount == 1 && 3632 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3633 VATTR_NULL(&vattr); 3634 if (np->n_flag & NACC) 3635 vattr.va_atime = np->n_atim; 3636 if (np->n_flag & NUPD) 3637 vattr.va_mtime = np->n_mtim; 3638 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3639 } 3640 } 3641 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3642 } 3643 3644 /* 3645 * Read wrapper for fifos. 3646 */ 3647 int 3648 nfsfifo_read(v) 3649 void *v; 3650 { 3651 struct vop_read_args /* { 3652 struct vnode *a_vp; 3653 struct uio *a_uio; 3654 int a_ioflag; 3655 kauth_cred_t a_cred; 3656 } */ *ap = v; 3657 struct nfsnode *np = VTONFS(ap->a_vp); 3658 3659 /* 3660 * Set access flag. 3661 */ 3662 np->n_flag |= NACC; 3663 getnanotime(&np->n_atim); 3664 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3665 } 3666 3667 /* 3668 * Write wrapper for fifos. 3669 */ 3670 int 3671 nfsfifo_write(v) 3672 void *v; 3673 { 3674 struct vop_write_args /* { 3675 struct vnode *a_vp; 3676 struct uio *a_uio; 3677 int a_ioflag; 3678 kauth_cred_t a_cred; 3679 } */ *ap = v; 3680 struct nfsnode *np = VTONFS(ap->a_vp); 3681 3682 /* 3683 * Set update flag. 3684 */ 3685 np->n_flag |= NUPD; 3686 getnanotime(&np->n_mtim); 3687 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3688 } 3689 3690 /* 3691 * Close wrapper for fifos. 3692 * 3693 * Update the times on the nfsnode then do fifo close. 3694 */ 3695 int 3696 nfsfifo_close(v) 3697 void *v; 3698 { 3699 struct vop_close_args /* { 3700 struct vnode *a_vp; 3701 int a_fflag; 3702 kauth_cred_t a_cred; 3703 struct lwp *a_l; 3704 } */ *ap = v; 3705 struct vnode *vp = ap->a_vp; 3706 struct nfsnode *np = VTONFS(vp); 3707 struct vattr vattr; 3708 3709 if (np->n_flag & (NACC | NUPD)) { 3710 struct timespec ts; 3711 3712 getnanotime(&ts); 3713 if (np->n_flag & NACC) 3714 np->n_atim = ts; 3715 if (np->n_flag & NUPD) 3716 np->n_mtim = ts; 3717 np->n_flag |= NCHG; 3718 if (vp->v_usecount == 1 && 3719 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3720 VATTR_NULL(&vattr); 3721 if (np->n_flag & NACC) 3722 vattr.va_atime = np->n_atim; 3723 if (np->n_flag & NUPD) 3724 vattr.va_mtime = np->n_mtim; 3725 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3726 } 3727 } 3728 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3729 } 3730
Indexes created Mon Oct 13 21:09:55 GMT 2025