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sys/nfs/nfs_vnops.c
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1 /* $NetBSD: nfs_vnops.c,v 1.245.2.1 2007/02/17 23:27:51 tron 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 1.245.2.1 2007/02/17 23:27:51 tron 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 error = 0, attrflag, fhsize; 830 const int v3 = NFS_ISV3(dvp); 831 832 flags = cnp->cn_flags; 833 834 *vpp = NULLVP; 835 newvp = NULLVP; 836 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 837 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 838 return (EROFS); 839 if (dvp->v_type != VDIR) 840 return (ENOTDIR); 841 842 /* 843 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 844 */ 845 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 846 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 847 if (error) 848 return error; 849 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 850 return EISDIR; 851 VREF(dvp); 852 *vpp = dvp; 853 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 854 cnp->cn_flags |= SAVENAME; 855 return 0; 856 } 857 858 np = VTONFS(dvp); 859 860 /* 861 * Before tediously performing a linear scan of the directory, 862 * check the name cache to see if the directory/name pair 863 * we are looking for is known already. 864 * If the directory/name pair is found in the name cache, 865 * we have to ensure the directory has not changed from 866 * the time the cache entry has been created. If it has, 867 * the cache entry has to be ignored. 868 */ 869 error = cache_lookup_raw(dvp, vpp, cnp); 870 KASSERT(dvp != *vpp); 871 if (error >= 0) { 872 struct vattr vattr; 873 int err2; 874 875 if (error && error != ENOENT) { 876 *vpp = NULLVP; 877 return error; 878 } 879 880 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 881 if (err2 != 0) { 882 if (error == 0) 883 vrele(*vpp); 884 *vpp = NULLVP; 885 return err2; 886 } 887 888 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 889 cnp->cn_lwp) || timespeccmp(&vattr.va_mtime, 890 &VTONFS(dvp)->n_nctime, !=)) { 891 if (error == 0) { 892 vrele(*vpp); 893 *vpp = NULLVP; 894 } 895 cache_purge1(dvp, NULL, PURGE_CHILDREN); 896 timespecclear(&np->n_nctime); 897 goto dorpc; 898 } 899 900 if (error == ENOENT) { 901 goto noentry; 902 } 903 904 newvp = *vpp; 905 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp) 906 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 907 nfsstats.lookupcache_hits++; 908 if ((flags & ISDOTDOT) != 0) { 909 VOP_UNLOCK(dvp, 0); 910 } 911 error = vn_lock(newvp, LK_EXCLUSIVE); 912 if ((flags & ISDOTDOT) != 0) { 913 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 914 } 915 if (error) { 916 /* newvp has been revoked. */ 917 vrele(newvp); 918 *vpp = NULL; 919 return error; 920 } 921 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 922 cnp->cn_flags |= SAVENAME; 923 KASSERT(newvp->v_type != VNON); 924 return (0); 925 } 926 cache_purge1(newvp, NULL, PURGE_PARENTS); 927 vrele(newvp); 928 *vpp = NULLVP; 929 } 930 dorpc: 931 #if 0 932 /* 933 * because nfsv3 has the same CREATE semantics as ours, 934 * we don't have to perform LOOKUPs beforehand. 935 * 936 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 937 * XXX although we have no way to know if O_EXCL is requested or not. 938 */ 939 940 if (v3 && cnp->cn_nameiop == CREATE && 941 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 942 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 943 cnp->cn_flags |= SAVENAME; 944 return (EJUSTRETURN); 945 } 946 #endif /* 0 */ 947 948 error = 0; 949 newvp = NULLVP; 950 nfsstats.lookupcache_misses++; 951 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 952 len = cnp->cn_namelen; 953 nfsm_reqhead(np, NFSPROC_LOOKUP, 954 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 955 nfsm_fhtom(np, v3); 956 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 957 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_lwp, cnp->cn_cred); 958 if (error) { 959 nfsm_postop_attr(dvp, attrflag, 0); 960 m_freem(mrep); 961 goto nfsmout; 962 } 963 nfsm_getfh(fhp, fhsize, v3); 964 965 /* 966 * Handle RENAME case... 967 */ 968 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 969 if (NFS_CMPFH(np, fhp, fhsize)) { 970 m_freem(mrep); 971 return (EISDIR); 972 } 973 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 974 if (error) { 975 m_freem(mrep); 976 return error; 977 } 978 newvp = NFSTOV(np); 979 #ifndef NFS_V2_ONLY 980 if (v3) { 981 nfsm_postop_attr(newvp, attrflag, 0); 982 nfsm_postop_attr(dvp, attrflag, 0); 983 } else 984 #endif 985 nfsm_loadattr(newvp, (struct vattr *)0, 0); 986 *vpp = newvp; 987 m_freem(mrep); 988 cnp->cn_flags |= SAVENAME; 989 goto validate; 990 } 991 992 /* 993 * The postop attr handling is duplicated for each if case, 994 * because it should be done while dvp is locked (unlocking 995 * dvp is different for each case). 996 */ 997 998 if (NFS_CMPFH(np, fhp, fhsize)) { 999 /* 1000 * "." lookup 1001 */ 1002 VREF(dvp); 1003 newvp = dvp; 1004 #ifndef NFS_V2_ONLY 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag, 0); 1007 nfsm_postop_attr(dvp, attrflag, 0); 1008 } else 1009 #endif 1010 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1011 } else if (flags & ISDOTDOT) { 1012 /* 1013 * ".." lookup 1014 */ 1015 VOP_UNLOCK(dvp, 0); 1016 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1017 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1018 if (error) { 1019 m_freem(mrep); 1020 return error; 1021 } 1022 newvp = NFSTOV(np); 1023 1024 #ifndef NFS_V2_ONLY 1025 if (v3) { 1026 nfsm_postop_attr(newvp, attrflag, 0); 1027 nfsm_postop_attr(dvp, attrflag, 0); 1028 } else 1029 #endif 1030 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1031 } else { 1032 /* 1033 * Other lookups. 1034 */ 1035 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1036 if (error) { 1037 m_freem(mrep); 1038 return error; 1039 } 1040 newvp = NFSTOV(np); 1041 #ifndef NFS_V2_ONLY 1042 if (v3) { 1043 nfsm_postop_attr(newvp, attrflag, 0); 1044 nfsm_postop_attr(dvp, attrflag, 0); 1045 } else 1046 #endif 1047 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1048 } 1049 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1050 cnp->cn_flags |= SAVENAME; 1051 if ((cnp->cn_flags & MAKEENTRY) && 1052 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1053 nfs_cache_enter(dvp, newvp, cnp); 1054 } 1055 *vpp = newvp; 1056 nfsm_reqdone; 1057 if (error) { 1058 /* 1059 * We get here only because of errors returned by 1060 * the RPC. Otherwise we'll have returned above 1061 * (the nfsm_* macros will jump to nfsm_reqdone 1062 * on error). 1063 */ 1064 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1065 cnp->cn_nameiop != CREATE) { 1066 nfs_cache_enter(dvp, NULL, cnp); 1067 } 1068 if (newvp != NULLVP) { 1069 if (newvp == dvp) { 1070 vrele(newvp); 1071 } else { 1072 vput(newvp); 1073 } 1074 } 1075 noentry: 1076 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1077 (flags & ISLASTCN) && error == ENOENT) { 1078 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1079 error = EROFS; 1080 } else { 1081 error = EJUSTRETURN; 1082 cnp->cn_flags |= SAVENAME; 1083 } 1084 } 1085 *vpp = NULL; 1086 return error; 1087 } 1088 1089 validate: 1090 /* 1091 * make sure we have valid type and size. 1092 */ 1093 1094 newvp = *vpp; 1095 if (newvp->v_type == VNON) { 1096 struct vattr vattr; /* dummy */ 1097 1098 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1099 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp); 1100 if (error) { 1101 vput(newvp); 1102 *vpp = NULL; 1103 } 1104 } 1105 1106 return error; 1107 } 1108 1109 /* 1110 * nfs read call. 1111 * Just call nfs_bioread() to do the work. 1112 */ 1113 int 1114 nfs_read(v) 1115 void *v; 1116 { 1117 struct vop_read_args /* { 1118 struct vnode *a_vp; 1119 struct uio *a_uio; 1120 int a_ioflag; 1121 kauth_cred_t a_cred; 1122 } */ *ap = v; 1123 struct vnode *vp = ap->a_vp; 1124 1125 if (vp->v_type != VREG) 1126 return EISDIR; 1127 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1128 } 1129 1130 /* 1131 * nfs readlink call 1132 */ 1133 int 1134 nfs_readlink(v) 1135 void *v; 1136 { 1137 struct vop_readlink_args /* { 1138 struct vnode *a_vp; 1139 struct uio *a_uio; 1140 kauth_cred_t a_cred; 1141 } */ *ap = v; 1142 struct vnode *vp = ap->a_vp; 1143 struct nfsnode *np = VTONFS(vp); 1144 1145 if (vp->v_type != VLNK) 1146 return (EPERM); 1147 1148 if (np->n_rcred != NULL) { 1149 kauth_cred_free(np->n_rcred); 1150 } 1151 np->n_rcred = ap->a_cred; 1152 kauth_cred_hold(np->n_rcred); 1153 1154 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1155 } 1156 1157 /* 1158 * Do a readlink rpc. 1159 * Called by nfs_doio() from below the buffer cache. 1160 */ 1161 int 1162 nfs_readlinkrpc(vp, uiop, cred) 1163 struct vnode *vp; 1164 struct uio *uiop; 1165 kauth_cred_t cred; 1166 { 1167 u_int32_t *tl; 1168 caddr_t cp; 1169 int32_t t1, t2; 1170 caddr_t bpos, dpos, cp2; 1171 int error = 0; 1172 uint32_t len; 1173 struct mbuf *mreq, *mrep, *md, *mb; 1174 const int v3 = NFS_ISV3(vp); 1175 struct nfsnode *np = VTONFS(vp); 1176 #ifndef NFS_V2_ONLY 1177 int attrflag; 1178 #endif 1179 1180 nfsstats.rpccnt[NFSPROC_READLINK]++; 1181 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1182 nfsm_fhtom(np, v3); 1183 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1184 #ifndef NFS_V2_ONLY 1185 if (v3) 1186 nfsm_postop_attr(vp, attrflag, 0); 1187 #endif 1188 if (!error) { 1189 #ifndef NFS_V2_ONLY 1190 if (v3) { 1191 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1192 len = fxdr_unsigned(uint32_t, *tl); 1193 if (len > MAXPATHLEN) { 1194 /* 1195 * this pathname is too long for us. 1196 */ 1197 m_freem(mrep); 1198 /* Solaris returns EINVAL. should we follow? */ 1199 error = ENAMETOOLONG; 1200 goto nfsmout; 1201 } 1202 } else 1203 #endif 1204 { 1205 nfsm_strsiz(len, NFS_MAXPATHLEN); 1206 } 1207 nfsm_mtouio(uiop, len); 1208 } 1209 nfsm_reqdone; 1210 return (error); 1211 } 1212 1213 /* 1214 * nfs read rpc call 1215 * Ditto above 1216 */ 1217 int 1218 nfs_readrpc(vp, uiop) 1219 struct vnode *vp; 1220 struct uio *uiop; 1221 { 1222 u_int32_t *tl; 1223 caddr_t cp; 1224 int32_t t1, t2; 1225 caddr_t bpos, dpos, cp2; 1226 struct mbuf *mreq, *mrep, *md, *mb; 1227 struct nfsmount *nmp; 1228 int error = 0, len, retlen, tsiz, eof, byte_count; 1229 const int v3 = NFS_ISV3(vp); 1230 struct nfsnode *np = VTONFS(vp); 1231 #ifndef NFS_V2_ONLY 1232 int attrflag; 1233 #endif 1234 1235 #ifndef nolint 1236 eof = 0; 1237 #endif 1238 nmp = VFSTONFS(vp->v_mount); 1239 tsiz = uiop->uio_resid; 1240 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1241 return (EFBIG); 1242 iostat_busy(nmp->nm_stats); 1243 byte_count = 0; /* count bytes actually transferred */ 1244 while (tsiz > 0) { 1245 nfsstats.rpccnt[NFSPROC_READ]++; 1246 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1247 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1248 nfsm_fhtom(np, v3); 1249 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1250 #ifndef NFS_V2_ONLY 1251 if (v3) { 1252 txdr_hyper(uiop->uio_offset, tl); 1253 *(tl + 2) = txdr_unsigned(len); 1254 } else 1255 #endif 1256 { 1257 *tl++ = txdr_unsigned(uiop->uio_offset); 1258 *tl++ = txdr_unsigned(len); 1259 *tl = 0; 1260 } 1261 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1262 #ifndef NFS_V2_ONLY 1263 if (v3) { 1264 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1265 if (error) { 1266 m_freem(mrep); 1267 goto nfsmout; 1268 } 1269 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1270 eof = fxdr_unsigned(int, *(tl + 1)); 1271 } else 1272 #endif 1273 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1274 nfsm_strsiz(retlen, nmp->nm_rsize); 1275 nfsm_mtouio(uiop, retlen); 1276 m_freem(mrep); 1277 tsiz -= retlen; 1278 byte_count += retlen; 1279 #ifndef NFS_V2_ONLY 1280 if (v3) { 1281 if (eof || retlen == 0) 1282 tsiz = 0; 1283 } else 1284 #endif 1285 if (retlen < len) 1286 tsiz = 0; 1287 } 1288 nfsmout: 1289 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1290 return (error); 1291 } 1292 1293 struct nfs_writerpc_context { 1294 struct simplelock nwc_slock; 1295 volatile int nwc_mbufcount; 1296 }; 1297 1298 /* 1299 * free mbuf used to refer protected pages while write rpc call. 1300 * called at splvm. 1301 */ 1302 static void 1303 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf, size_t size, void *arg) 1304 { 1305 struct nfs_writerpc_context *ctx = arg; 1306 1307 KASSERT(m != NULL); 1308 KASSERT(ctx != NULL); 1309 pool_cache_put(&mbpool_cache, m); 1310 simple_lock(&ctx->nwc_slock); 1311 if (--ctx->nwc_mbufcount == 0) { 1312 wakeup(ctx); 1313 } 1314 simple_unlock(&ctx->nwc_slock); 1315 } 1316 1317 /* 1318 * nfs write call 1319 */ 1320 int 1321 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1322 struct vnode *vp; 1323 struct uio *uiop; 1324 int *iomode; 1325 boolean_t pageprotected; 1326 boolean_t *stalewriteverfp; 1327 { 1328 u_int32_t *tl; 1329 caddr_t cp; 1330 int32_t t1, t2; 1331 caddr_t bpos, dpos; 1332 struct mbuf *mreq, *mrep, *md, *mb; 1333 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1334 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1335 const int v3 = NFS_ISV3(vp); 1336 int committed = NFSV3WRITE_FILESYNC; 1337 struct nfsnode *np = VTONFS(vp); 1338 struct nfs_writerpc_context ctx; 1339 int s, byte_count; 1340 struct lwp *l = NULL; 1341 size_t origresid; 1342 #ifndef NFS_V2_ONLY 1343 caddr_t cp2; 1344 int rlen, commit; 1345 #endif 1346 1347 simple_lock_init(&ctx.nwc_slock); 1348 ctx.nwc_mbufcount = 1; 1349 1350 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1351 panic("writerpc readonly vp %p", vp); 1352 } 1353 1354 #ifdef DIAGNOSTIC 1355 if (uiop->uio_iovcnt != 1) 1356 panic("nfs: writerpc iovcnt > 1"); 1357 #endif 1358 tsiz = uiop->uio_resid; 1359 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1360 return (EFBIG); 1361 if (pageprotected) { 1362 l = curlwp; 1363 PHOLD(l); 1364 } 1365 retry: 1366 origresid = uiop->uio_resid; 1367 KASSERT(origresid == uiop->uio_iov->iov_len); 1368 iostat_busy(nmp->nm_stats); 1369 byte_count = 0; /* count of bytes actually written */ 1370 while (tsiz > 0) { 1371 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1372 uint32_t backup; 1373 boolean_t stalewriteverf = FALSE; 1374 1375 nfsstats.rpccnt[NFSPROC_WRITE]++; 1376 len = min(tsiz, nmp->nm_wsize); 1377 datalen = pageprotected ? 0 : nfsm_rndup(len); 1378 nfsm_reqhead(np, NFSPROC_WRITE, 1379 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1380 nfsm_fhtom(np, v3); 1381 #ifndef NFS_V2_ONLY 1382 if (v3) { 1383 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1384 txdr_hyper(uiop->uio_offset, tl); 1385 tl += 2; 1386 *tl++ = txdr_unsigned(len); 1387 *tl++ = txdr_unsigned(*iomode); 1388 *tl = txdr_unsigned(len); 1389 } else 1390 #endif 1391 { 1392 u_int32_t x; 1393 1394 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1395 /* Set both "begin" and "current" to non-garbage. */ 1396 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1397 *tl++ = x; /* "begin offset" */ 1398 *tl++ = x; /* "current offset" */ 1399 x = txdr_unsigned(len); 1400 *tl++ = x; /* total to this offset */ 1401 *tl = x; /* size of this write */ 1402 1403 } 1404 if (pageprotected) { 1405 /* 1406 * since we know pages can't be modified during i/o, 1407 * no need to copy them for us. 1408 */ 1409 struct mbuf *m; 1410 struct iovec *iovp = uiop->uio_iov; 1411 1412 m = m_get(M_WAIT, MT_DATA); 1413 MCLAIM(m, &nfs_mowner); 1414 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1415 nfs_writerpc_extfree, &ctx); 1416 m->m_flags |= M_EXT_ROMAP; 1417 m->m_len = len; 1418 mb->m_next = m; 1419 /* 1420 * no need to maintain mb and bpos here 1421 * because no one care them later. 1422 */ 1423 #if 0 1424 mb = m; 1425 bpos = mtod(caddr_t, mb) + mb->m_len; 1426 #endif 1427 UIO_ADVANCE(uiop, len); 1428 uiop->uio_offset += len; 1429 s = splvm(); 1430 simple_lock(&ctx.nwc_slock); 1431 ctx.nwc_mbufcount++; 1432 simple_unlock(&ctx.nwc_slock); 1433 splx(s); 1434 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1435 } else { 1436 nfsm_uiotom(uiop, len); 1437 } 1438 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1439 #ifndef NFS_V2_ONLY 1440 if (v3) { 1441 wccflag = NFSV3_WCCCHK; 1442 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1443 if (!error) { 1444 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1445 + NFSX_V3WRITEVERF); 1446 rlen = fxdr_unsigned(int, *tl++); 1447 if (rlen == 0) { 1448 error = NFSERR_IO; 1449 m_freem(mrep); 1450 break; 1451 } else if (rlen < len) { 1452 backup = len - rlen; 1453 UIO_ADVANCE(uiop, -backup); 1454 uiop->uio_offset -= backup; 1455 len = rlen; 1456 } 1457 commit = fxdr_unsigned(int, *tl++); 1458 1459 /* 1460 * Return the lowest committment level 1461 * obtained by any of the RPCs. 1462 */ 1463 if (committed == NFSV3WRITE_FILESYNC) 1464 committed = commit; 1465 else if (committed == NFSV3WRITE_DATASYNC && 1466 commit == NFSV3WRITE_UNSTABLE) 1467 committed = commit; 1468 simple_lock(&nmp->nm_slock); 1469 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1470 memcpy(nmp->nm_writeverf, tl, 1471 NFSX_V3WRITEVERF); 1472 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1473 } else if ((nmp->nm_iflag & 1474 NFSMNT_STALEWRITEVERF) || 1475 memcmp(tl, nmp->nm_writeverf, 1476 NFSX_V3WRITEVERF)) { 1477 memcpy(nmp->nm_writeverf, tl, 1478 NFSX_V3WRITEVERF); 1479 /* 1480 * note NFSMNT_STALEWRITEVERF 1481 * if we're the first thread to 1482 * notice it. 1483 */ 1484 if ((nmp->nm_iflag & 1485 NFSMNT_STALEWRITEVERF) == 0) { 1486 stalewriteverf = TRUE; 1487 nmp->nm_iflag |= 1488 NFSMNT_STALEWRITEVERF; 1489 } 1490 } 1491 simple_unlock(&nmp->nm_slock); 1492 } 1493 } else 1494 #endif 1495 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1496 if (wccflag) 1497 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1498 m_freem(mrep); 1499 if (error) 1500 break; 1501 tsiz -= len; 1502 byte_count += len; 1503 if (stalewriteverf) { 1504 *stalewriteverfp = TRUE; 1505 stalewriteverf = FALSE; 1506 if (committed == NFSV3WRITE_UNSTABLE && 1507 len != origresid) { 1508 /* 1509 * if our write requests weren't atomic but 1510 * unstable, datas in previous iterations 1511 * might have already been lost now. 1512 * then, we should resend them to nfsd. 1513 */ 1514 backup = origresid - tsiz; 1515 UIO_ADVANCE(uiop, -backup); 1516 uiop->uio_offset -= backup; 1517 tsiz = origresid; 1518 goto retry; 1519 } 1520 } 1521 } 1522 nfsmout: 1523 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1524 if (pageprotected) { 1525 /* 1526 * wait until mbufs go away. 1527 * retransmitted mbufs can survive longer than rpc requests 1528 * themselves. 1529 */ 1530 s = splvm(); 1531 simple_lock(&ctx.nwc_slock); 1532 ctx.nwc_mbufcount--; 1533 while (ctx.nwc_mbufcount > 0) { 1534 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1535 } 1536 simple_unlock(&ctx.nwc_slock); 1537 splx(s); 1538 PRELE(l); 1539 } 1540 *iomode = committed; 1541 if (error) 1542 uiop->uio_resid = tsiz; 1543 return (error); 1544 } 1545 1546 /* 1547 * nfs mknod rpc 1548 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1549 * mode set to specify the file type and the size field for rdev. 1550 */ 1551 int 1552 nfs_mknodrpc(dvp, vpp, cnp, vap) 1553 struct vnode *dvp; 1554 struct vnode **vpp; 1555 struct componentname *cnp; 1556 struct vattr *vap; 1557 { 1558 struct nfsv2_sattr *sp; 1559 u_int32_t *tl; 1560 caddr_t cp; 1561 int32_t t1, t2; 1562 struct vnode *newvp = (struct vnode *)0; 1563 struct nfsnode *dnp, *np; 1564 char *cp2; 1565 caddr_t bpos, dpos; 1566 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1567 struct mbuf *mreq, *mrep, *md, *mb; 1568 u_int32_t rdev; 1569 const int v3 = NFS_ISV3(dvp); 1570 1571 if (vap->va_type == VCHR || vap->va_type == VBLK) 1572 rdev = txdr_unsigned(vap->va_rdev); 1573 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1574 rdev = nfs_xdrneg1; 1575 else { 1576 VOP_ABORTOP(dvp, cnp); 1577 vput(dvp); 1578 return (EOPNOTSUPP); 1579 } 1580 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1581 dnp = VTONFS(dvp); 1582 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1583 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1584 nfsm_fhtom(dnp, v3); 1585 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1586 #ifndef NFS_V2_ONLY 1587 if (v3) { 1588 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1589 *tl++ = vtonfsv3_type(vap->va_type); 1590 nfsm_v3attrbuild(vap, FALSE); 1591 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1592 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1593 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1594 *tl = txdr_unsigned(minor(vap->va_rdev)); 1595 } 1596 } else 1597 #endif 1598 { 1599 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1600 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1601 sp->sa_uid = nfs_xdrneg1; 1602 sp->sa_gid = nfs_xdrneg1; 1603 sp->sa_size = rdev; 1604 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1605 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1606 } 1607 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_lwp, cnp->cn_cred); 1608 if (!error) { 1609 nfsm_mtofh(dvp, newvp, v3, gotvp); 1610 if (!gotvp) { 1611 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1612 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1613 if (!error) 1614 newvp = NFSTOV(np); 1615 } 1616 } 1617 #ifndef NFS_V2_ONLY 1618 if (v3) 1619 nfsm_wcc_data(dvp, wccflag, 0, !error); 1620 #endif 1621 nfsm_reqdone; 1622 if (error) { 1623 if (newvp) 1624 vput(newvp); 1625 } else { 1626 if (cnp->cn_flags & MAKEENTRY) 1627 nfs_cache_enter(dvp, newvp, cnp); 1628 *vpp = newvp; 1629 } 1630 PNBUF_PUT(cnp->cn_pnbuf); 1631 VTONFS(dvp)->n_flag |= NMODIFIED; 1632 if (!wccflag) 1633 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1634 vput(dvp); 1635 return (error); 1636 } 1637 1638 /* 1639 * nfs mknod vop 1640 * just call nfs_mknodrpc() to do the work. 1641 */ 1642 /* ARGSUSED */ 1643 int 1644 nfs_mknod(v) 1645 void *v; 1646 { 1647 struct vop_mknod_args /* { 1648 struct vnode *a_dvp; 1649 struct vnode **a_vpp; 1650 struct componentname *a_cnp; 1651 struct vattr *a_vap; 1652 } */ *ap = v; 1653 struct vnode *dvp = ap->a_dvp; 1654 struct componentname *cnp = ap->a_cnp; 1655 int error; 1656 1657 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1658 VN_KNOTE(dvp, NOTE_WRITE); 1659 if (error == 0 || error == EEXIST) 1660 cache_purge1(dvp, cnp, 0); 1661 return (error); 1662 } 1663 1664 #ifndef NFS_V2_ONLY 1665 static u_long create_verf; 1666 #endif 1667 /* 1668 * nfs file create call 1669 */ 1670 int 1671 nfs_create(v) 1672 void *v; 1673 { 1674 struct vop_create_args /* { 1675 struct vnode *a_dvp; 1676 struct vnode **a_vpp; 1677 struct componentname *a_cnp; 1678 struct vattr *a_vap; 1679 } */ *ap = v; 1680 struct vnode *dvp = ap->a_dvp; 1681 struct vattr *vap = ap->a_vap; 1682 struct componentname *cnp = ap->a_cnp; 1683 struct nfsv2_sattr *sp; 1684 u_int32_t *tl; 1685 caddr_t cp; 1686 int32_t t1, t2; 1687 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1688 struct vnode *newvp = (struct vnode *)0; 1689 caddr_t bpos, dpos, cp2; 1690 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1691 struct mbuf *mreq, *mrep, *md, *mb; 1692 const int v3 = NFS_ISV3(dvp); 1693 1694 /* 1695 * Oops, not for me.. 1696 */ 1697 if (vap->va_type == VSOCK) 1698 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1699 1700 KASSERT(vap->va_type == VREG); 1701 1702 #ifdef VA_EXCLUSIVE 1703 if (vap->va_vaflags & VA_EXCLUSIVE) 1704 fmode |= O_EXCL; 1705 #endif 1706 again: 1707 error = 0; 1708 nfsstats.rpccnt[NFSPROC_CREATE]++; 1709 dnp = VTONFS(dvp); 1710 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1711 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1712 nfsm_fhtom(dnp, v3); 1713 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1714 #ifndef NFS_V2_ONLY 1715 if (v3) { 1716 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1717 if (fmode & O_EXCL) { 1718 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1719 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1720 #ifdef INET 1721 if (TAILQ_FIRST(&in_ifaddrhead)) 1722 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1723 ia_addr.sin_addr.s_addr; 1724 else 1725 *tl++ = create_verf; 1726 #else 1727 *tl++ = create_verf; 1728 #endif 1729 *tl = ++create_verf; 1730 } else { 1731 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1732 nfsm_v3attrbuild(vap, FALSE); 1733 } 1734 } else 1735 #endif 1736 { 1737 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1738 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1739 sp->sa_uid = nfs_xdrneg1; 1740 sp->sa_gid = nfs_xdrneg1; 1741 sp->sa_size = 0; 1742 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1743 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1744 } 1745 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_lwp, cnp->cn_cred); 1746 if (!error) { 1747 nfsm_mtofh(dvp, newvp, v3, gotvp); 1748 if (!gotvp) { 1749 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1750 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1751 if (!error) 1752 newvp = NFSTOV(np); 1753 } 1754 } 1755 #ifndef NFS_V2_ONLY 1756 if (v3) 1757 nfsm_wcc_data(dvp, wccflag, 0, !error); 1758 #endif 1759 nfsm_reqdone; 1760 if (error) { 1761 /* 1762 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 1763 */ 1764 if (v3 && (fmode & O_EXCL) && error == ENOTSUP) { 1765 fmode &= ~O_EXCL; 1766 goto again; 1767 } 1768 } else if (v3 && (fmode & O_EXCL)) { 1769 struct timespec ts; 1770 1771 getnanotime(&ts); 1772 1773 /* 1774 * make sure that we'll update timestamps as 1775 * most server implementations use them to store 1776 * the create verifier. 1777 * 1778 * XXX it's better to use TOSERVER always. 1779 */ 1780 1781 if (vap->va_atime.tv_sec == VNOVAL) 1782 vap->va_atime = ts; 1783 if (vap->va_mtime.tv_sec == VNOVAL) 1784 vap->va_mtime = ts; 1785 1786 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_lwp); 1787 } 1788 if (error == 0) { 1789 if (cnp->cn_flags & MAKEENTRY) 1790 nfs_cache_enter(dvp, newvp, cnp); 1791 else 1792 cache_purge1(dvp, cnp, 0); 1793 *ap->a_vpp = newvp; 1794 } else { 1795 if (newvp) 1796 vput(newvp); 1797 if (error == EEXIST) 1798 cache_purge1(dvp, cnp, 0); 1799 } 1800 PNBUF_PUT(cnp->cn_pnbuf); 1801 VTONFS(dvp)->n_flag |= NMODIFIED; 1802 if (!wccflag) 1803 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1804 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1805 vput(dvp); 1806 return (error); 1807 } 1808 1809 /* 1810 * nfs file remove call 1811 * To try and make nfs semantics closer to ufs semantics, a file that has 1812 * other processes using the vnode is renamed instead of removed and then 1813 * removed later on the last close. 1814 * - If v_usecount > 1 1815 * If a rename is not already in the works 1816 * call nfs_sillyrename() to set it up 1817 * else 1818 * do the remove rpc 1819 */ 1820 int 1821 nfs_remove(v) 1822 void *v; 1823 { 1824 struct vop_remove_args /* { 1825 struct vnodeop_desc *a_desc; 1826 struct vnode * a_dvp; 1827 struct vnode * a_vp; 1828 struct componentname * a_cnp; 1829 } */ *ap = v; 1830 struct vnode *vp = ap->a_vp; 1831 struct vnode *dvp = ap->a_dvp; 1832 struct componentname *cnp = ap->a_cnp; 1833 struct nfsnode *np = VTONFS(vp); 1834 int error = 0; 1835 struct vattr vattr; 1836 1837 #ifndef DIAGNOSTIC 1838 if ((cnp->cn_flags & HASBUF) == 0) 1839 panic("nfs_remove: no name"); 1840 if (vp->v_usecount < 1) 1841 panic("nfs_remove: bad v_usecount"); 1842 #endif 1843 if (vp->v_type == VDIR) 1844 error = EPERM; 1845 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1846 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_lwp) == 0 && 1847 vattr.va_nlink > 1)) { 1848 /* 1849 * Purge the name cache so that the chance of a lookup for 1850 * the name succeeding while the remove is in progress is 1851 * minimized. Without node locking it can still happen, such 1852 * that an I/O op returns ESTALE, but since you get this if 1853 * another host removes the file.. 1854 */ 1855 cache_purge(vp); 1856 /* 1857 * throw away biocache buffers, mainly to avoid 1858 * unnecessary delayed writes later. 1859 */ 1860 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_lwp, 1); 1861 /* Do the rpc */ 1862 if (error != EINTR) 1863 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1864 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp); 1865 } else if (!np->n_sillyrename) 1866 error = nfs_sillyrename(dvp, vp, cnp, FALSE); 1867 PNBUF_PUT(cnp->cn_pnbuf); 1868 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1869 vattr.va_nlink == 1) { 1870 np->n_flag |= NREMOVED; 1871 } 1872 NFS_INVALIDATE_ATTRCACHE(np); 1873 VN_KNOTE(vp, NOTE_DELETE); 1874 VN_KNOTE(dvp, NOTE_WRITE); 1875 if (dvp == vp) 1876 vrele(vp); 1877 else 1878 vput(vp); 1879 vput(dvp); 1880 return (error); 1881 } 1882 1883 /* 1884 * nfs file remove rpc called from nfs_inactive 1885 */ 1886 int 1887 nfs_removeit(sp) 1888 struct sillyrename *sp; 1889 { 1890 1891 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1892 (struct lwp *)0)); 1893 } 1894 1895 /* 1896 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1897 */ 1898 int 1899 nfs_removerpc(dvp, name, namelen, cred, l) 1900 struct vnode *dvp; 1901 const char *name; 1902 int namelen; 1903 kauth_cred_t cred; 1904 struct lwp *l; 1905 { 1906 u_int32_t *tl; 1907 caddr_t cp; 1908 #ifndef NFS_V2_ONLY 1909 int32_t t1; 1910 caddr_t cp2; 1911 #endif 1912 int32_t t2; 1913 caddr_t bpos, dpos; 1914 int error = 0, wccflag = NFSV3_WCCRATTR; 1915 struct mbuf *mreq, *mrep, *md, *mb; 1916 const int v3 = NFS_ISV3(dvp); 1917 int rexmit = 0; 1918 struct nfsnode *dnp = VTONFS(dvp); 1919 1920 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1921 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1922 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1923 nfsm_fhtom(dnp, v3); 1924 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1925 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1926 #ifndef NFS_V2_ONLY 1927 if (v3) 1928 nfsm_wcc_data(dvp, wccflag, 0, !error); 1929 #endif 1930 nfsm_reqdone; 1931 VTONFS(dvp)->n_flag |= NMODIFIED; 1932 if (!wccflag) 1933 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1934 /* 1935 * Kludge City: If the first reply to the remove rpc is lost.. 1936 * the reply to the retransmitted request will be ENOENT 1937 * since the file was in fact removed 1938 * Therefore, we cheat and return success. 1939 */ 1940 if (rexmit && error == ENOENT) 1941 error = 0; 1942 return (error); 1943 } 1944 1945 /* 1946 * nfs file rename call 1947 */ 1948 int 1949 nfs_rename(v) 1950 void *v; 1951 { 1952 struct vop_rename_args /* { 1953 struct vnode *a_fdvp; 1954 struct vnode *a_fvp; 1955 struct componentname *a_fcnp; 1956 struct vnode *a_tdvp; 1957 struct vnode *a_tvp; 1958 struct componentname *a_tcnp; 1959 } */ *ap = v; 1960 struct vnode *fvp = ap->a_fvp; 1961 struct vnode *tvp = ap->a_tvp; 1962 struct vnode *fdvp = ap->a_fdvp; 1963 struct vnode *tdvp = ap->a_tdvp; 1964 struct componentname *tcnp = ap->a_tcnp; 1965 struct componentname *fcnp = ap->a_fcnp; 1966 int error; 1967 1968 #ifndef DIAGNOSTIC 1969 if ((tcnp->cn_flags & HASBUF) == 0 || 1970 (fcnp->cn_flags & HASBUF) == 0) 1971 panic("nfs_rename: no name"); 1972 #endif 1973 /* Check for cross-device rename */ 1974 if ((fvp->v_mount != tdvp->v_mount) || 1975 (tvp && (fvp->v_mount != tvp->v_mount))) { 1976 error = EXDEV; 1977 goto out; 1978 } 1979 1980 /* 1981 * If the tvp exists and is in use, sillyrename it before doing the 1982 * rename of the new file over it. 1983 * 1984 * Have sillyrename use link instead of rename if possible, 1985 * so that we don't lose the file if the rename fails, and so 1986 * that there's no window when the "to" file doesn't exist. 1987 */ 1988 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1989 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, TRUE)) { 1990 VN_KNOTE(tvp, NOTE_DELETE); 1991 vput(tvp); 1992 tvp = NULL; 1993 } 1994 1995 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1996 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1997 tcnp->cn_lwp); 1998 1999 VN_KNOTE(fdvp, NOTE_WRITE); 2000 VN_KNOTE(tdvp, NOTE_WRITE); 2001 if (error == 0 || error == EEXIST) { 2002 if (fvp->v_type == VDIR) 2003 cache_purge(fvp); 2004 else 2005 cache_purge1(fdvp, fcnp, 0); 2006 if (tvp != NULL && tvp->v_type == VDIR) 2007 cache_purge(tvp); 2008 else 2009 cache_purge1(tdvp, tcnp, 0); 2010 } 2011 out: 2012 if (tdvp == tvp) 2013 vrele(tdvp); 2014 else 2015 vput(tdvp); 2016 if (tvp) 2017 vput(tvp); 2018 vrele(fdvp); 2019 vrele(fvp); 2020 return (error); 2021 } 2022 2023 /* 2024 * nfs file rename rpc called from nfs_remove() above 2025 */ 2026 int 2027 nfs_renameit(sdvp, scnp, sp) 2028 struct vnode *sdvp; 2029 struct componentname *scnp; 2030 struct sillyrename *sp; 2031 { 2032 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2033 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_lwp)); 2034 } 2035 2036 /* 2037 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2038 */ 2039 int 2040 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2041 struct vnode *fdvp; 2042 const char *fnameptr; 2043 int fnamelen; 2044 struct vnode *tdvp; 2045 const char *tnameptr; 2046 int tnamelen; 2047 kauth_cred_t cred; 2048 struct lwp *l; 2049 { 2050 u_int32_t *tl; 2051 caddr_t cp; 2052 #ifndef NFS_V2_ONLY 2053 int32_t t1; 2054 caddr_t cp2; 2055 #endif 2056 int32_t t2; 2057 caddr_t bpos, dpos; 2058 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2059 struct mbuf *mreq, *mrep, *md, *mb; 2060 const int v3 = NFS_ISV3(fdvp); 2061 int rexmit = 0; 2062 struct nfsnode *fdnp = VTONFS(fdvp); 2063 2064 nfsstats.rpccnt[NFSPROC_RENAME]++; 2065 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2066 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2067 nfsm_rndup(tnamelen)); 2068 nfsm_fhtom(fdnp, v3); 2069 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2070 nfsm_fhtom(VTONFS(tdvp), v3); 2071 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2072 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2073 #ifndef NFS_V2_ONLY 2074 if (v3) { 2075 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2076 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2077 } 2078 #endif 2079 nfsm_reqdone; 2080 VTONFS(fdvp)->n_flag |= NMODIFIED; 2081 VTONFS(tdvp)->n_flag |= NMODIFIED; 2082 if (!fwccflag) 2083 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2084 if (!twccflag) 2085 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2086 /* 2087 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2088 */ 2089 if (rexmit && error == ENOENT) 2090 error = 0; 2091 return (error); 2092 } 2093 2094 /* 2095 * NFS link RPC, called from nfs_link. 2096 * Assumes dvp and vp locked, and leaves them that way. 2097 */ 2098 2099 static int 2100 nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, 2101 size_t namelen, kauth_cred_t cred, struct lwp *l) 2102 { 2103 u_int32_t *tl; 2104 caddr_t cp; 2105 #ifndef NFS_V2_ONLY 2106 int32_t t1; 2107 caddr_t cp2; 2108 #endif 2109 int32_t t2; 2110 caddr_t bpos, dpos; 2111 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2112 struct mbuf *mreq, *mrep, *md, *mb; 2113 const int v3 = NFS_ISV3(dvp); 2114 int rexmit = 0; 2115 struct nfsnode *np = VTONFS(vp); 2116 2117 nfsstats.rpccnt[NFSPROC_LINK]++; 2118 nfsm_reqhead(np, NFSPROC_LINK, 2119 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); 2120 nfsm_fhtom(np, v3); 2121 nfsm_fhtom(VTONFS(dvp), v3); 2122 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 2123 nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); 2124 #ifndef NFS_V2_ONLY 2125 if (v3) { 2126 nfsm_postop_attr(vp, attrflag, 0); 2127 nfsm_wcc_data(dvp, wccflag, 0, !error); 2128 } 2129 #endif 2130 nfsm_reqdone; 2131 2132 VTONFS(dvp)->n_flag |= NMODIFIED; 2133 if (!attrflag) 2134 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2135 if (!wccflag) 2136 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2137 2138 /* 2139 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2140 */ 2141 if (rexmit && error == EEXIST) 2142 error = 0; 2143 2144 return error; 2145 } 2146 2147 /* 2148 * nfs hard link create call 2149 */ 2150 int 2151 nfs_link(v) 2152 void *v; 2153 { 2154 struct vop_link_args /* { 2155 struct vnode *a_dvp; 2156 struct vnode *a_vp; 2157 struct componentname *a_cnp; 2158 } */ *ap = v; 2159 struct vnode *vp = ap->a_vp; 2160 struct vnode *dvp = ap->a_dvp; 2161 struct componentname *cnp = ap->a_cnp; 2162 int error = 0; 2163 2164 if (dvp->v_mount != vp->v_mount) { 2165 VOP_ABORTOP(dvp, cnp); 2166 vput(dvp); 2167 return (EXDEV); 2168 } 2169 if (dvp != vp) { 2170 error = vn_lock(vp, LK_EXCLUSIVE); 2171 if (error != 0) { 2172 VOP_ABORTOP(dvp, cnp); 2173 vput(dvp); 2174 return error; 2175 } 2176 } 2177 2178 /* 2179 * Push all writes to the server, so that the attribute cache 2180 * doesn't get "out of sync" with the server. 2181 * XXX There should be a better way! 2182 */ 2183 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_lwp); 2184 2185 error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2186 cnp->cn_cred, cnp->cn_lwp); 2187 2188 if (error == 0) 2189 cache_purge1(dvp, cnp, 0); 2190 PNBUF_PUT(cnp->cn_pnbuf); 2191 if (dvp != vp) 2192 VOP_UNLOCK(vp, 0); 2193 VN_KNOTE(vp, NOTE_LINK); 2194 VN_KNOTE(dvp, NOTE_WRITE); 2195 vput(dvp); 2196 return (error); 2197 } 2198 2199 /* 2200 * nfs symbolic link create call 2201 */ 2202 int 2203 nfs_symlink(v) 2204 void *v; 2205 { 2206 struct vop_symlink_args /* { 2207 struct vnode *a_dvp; 2208 struct vnode **a_vpp; 2209 struct componentname *a_cnp; 2210 struct vattr *a_vap; 2211 char *a_target; 2212 } */ *ap = v; 2213 struct vnode *dvp = ap->a_dvp; 2214 struct vattr *vap = ap->a_vap; 2215 struct componentname *cnp = ap->a_cnp; 2216 struct nfsv2_sattr *sp; 2217 u_int32_t *tl; 2218 caddr_t cp; 2219 int32_t t1, t2; 2220 caddr_t bpos, dpos, cp2; 2221 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2222 struct mbuf *mreq, *mrep, *md, *mb; 2223 struct vnode *newvp = (struct vnode *)0; 2224 const int v3 = NFS_ISV3(dvp); 2225 int rexmit = 0; 2226 struct nfsnode *dnp = VTONFS(dvp); 2227 2228 *ap->a_vpp = NULL; 2229 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2230 slen = strlen(ap->a_target); 2231 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2232 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2233 nfsm_fhtom(dnp, v3); 2234 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2235 #ifndef NFS_V2_ONlY 2236 if (v3) 2237 nfsm_v3attrbuild(vap, FALSE); 2238 #endif 2239 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2240 #ifndef NFS_V2_ONlY 2241 if (!v3) { 2242 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2243 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2244 sp->sa_uid = nfs_xdrneg1; 2245 sp->sa_gid = nfs_xdrneg1; 2246 sp->sa_size = nfs_xdrneg1; 2247 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2248 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2249 } 2250 #endif 2251 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_lwp, cnp->cn_cred, 2252 &rexmit); 2253 #ifndef NFS_V2_ONlY 2254 if (v3) { 2255 if (!error) 2256 nfsm_mtofh(dvp, newvp, v3, gotvp); 2257 nfsm_wcc_data(dvp, wccflag, 0, !error); 2258 } 2259 #endif 2260 nfsm_reqdone; 2261 /* 2262 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2263 */ 2264 if (rexmit && error == EEXIST) 2265 error = 0; 2266 if (error == 0 || error == EEXIST) 2267 cache_purge1(dvp, cnp, 0); 2268 if (error == 0 && newvp == NULL) { 2269 struct nfsnode *np = NULL; 2270 2271 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2272 cnp->cn_cred, cnp->cn_lwp, &np); 2273 if (error == 0) 2274 newvp = NFSTOV(np); 2275 } 2276 if (error) { 2277 if (newvp != NULL) 2278 vput(newvp); 2279 } else { 2280 *ap->a_vpp = newvp; 2281 } 2282 PNBUF_PUT(cnp->cn_pnbuf); 2283 VTONFS(dvp)->n_flag |= NMODIFIED; 2284 if (!wccflag) 2285 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2286 VN_KNOTE(dvp, NOTE_WRITE); 2287 vput(dvp); 2288 return (error); 2289 } 2290 2291 /* 2292 * nfs make dir call 2293 */ 2294 int 2295 nfs_mkdir(v) 2296 void *v; 2297 { 2298 struct vop_mkdir_args /* { 2299 struct vnode *a_dvp; 2300 struct vnode **a_vpp; 2301 struct componentname *a_cnp; 2302 struct vattr *a_vap; 2303 } */ *ap = v; 2304 struct vnode *dvp = ap->a_dvp; 2305 struct vattr *vap = ap->a_vap; 2306 struct componentname *cnp = ap->a_cnp; 2307 struct nfsv2_sattr *sp; 2308 u_int32_t *tl; 2309 caddr_t cp; 2310 int32_t t1, t2; 2311 int len; 2312 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2313 struct vnode *newvp = (struct vnode *)0; 2314 caddr_t bpos, dpos, cp2; 2315 int error = 0, wccflag = NFSV3_WCCRATTR; 2316 int gotvp = 0; 2317 int rexmit = 0; 2318 struct mbuf *mreq, *mrep, *md, *mb; 2319 const int v3 = NFS_ISV3(dvp); 2320 2321 len = cnp->cn_namelen; 2322 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2323 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2324 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2325 nfsm_fhtom(dnp, v3); 2326 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2327 #ifndef NFS_V2_ONLY 2328 if (v3) { 2329 nfsm_v3attrbuild(vap, FALSE); 2330 } else 2331 #endif 2332 { 2333 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2334 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2335 sp->sa_uid = nfs_xdrneg1; 2336 sp->sa_gid = nfs_xdrneg1; 2337 sp->sa_size = nfs_xdrneg1; 2338 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2339 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2340 } 2341 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2342 if (!error) 2343 nfsm_mtofh(dvp, newvp, v3, gotvp); 2344 if (v3) 2345 nfsm_wcc_data(dvp, wccflag, 0, !error); 2346 nfsm_reqdone; 2347 VTONFS(dvp)->n_flag |= NMODIFIED; 2348 if (!wccflag) 2349 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2350 /* 2351 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2352 * if we can succeed in looking up the directory. 2353 */ 2354 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2355 if (newvp) { 2356 vput(newvp); 2357 newvp = (struct vnode *)0; 2358 } 2359 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2360 cnp->cn_lwp, &np); 2361 if (!error) { 2362 newvp = NFSTOV(np); 2363 if (newvp->v_type != VDIR || newvp == dvp) 2364 error = EEXIST; 2365 } 2366 } 2367 if (error) { 2368 if (newvp) { 2369 if (dvp != newvp) 2370 vput(newvp); 2371 else 2372 vrele(newvp); 2373 } 2374 } else { 2375 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2376 if (cnp->cn_flags & MAKEENTRY) 2377 nfs_cache_enter(dvp, newvp, cnp); 2378 *ap->a_vpp = newvp; 2379 } 2380 PNBUF_PUT(cnp->cn_pnbuf); 2381 vput(dvp); 2382 return (error); 2383 } 2384 2385 /* 2386 * nfs remove directory call 2387 */ 2388 int 2389 nfs_rmdir(v) 2390 void *v; 2391 { 2392 struct vop_rmdir_args /* { 2393 struct vnode *a_dvp; 2394 struct vnode *a_vp; 2395 struct componentname *a_cnp; 2396 } */ *ap = v; 2397 struct vnode *vp = ap->a_vp; 2398 struct vnode *dvp = ap->a_dvp; 2399 struct componentname *cnp = ap->a_cnp; 2400 u_int32_t *tl; 2401 caddr_t cp; 2402 #ifndef NFS_V2_ONLY 2403 int32_t t1; 2404 caddr_t cp2; 2405 #endif 2406 int32_t t2; 2407 caddr_t bpos, dpos; 2408 int error = 0, wccflag = NFSV3_WCCRATTR; 2409 int rexmit = 0; 2410 struct mbuf *mreq, *mrep, *md, *mb; 2411 const int v3 = NFS_ISV3(dvp); 2412 struct nfsnode *dnp; 2413 2414 if (dvp == vp) { 2415 vrele(dvp); 2416 vput(dvp); 2417 PNBUF_PUT(cnp->cn_pnbuf); 2418 return (EINVAL); 2419 } 2420 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2421 dnp = VTONFS(dvp); 2422 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2423 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2424 nfsm_fhtom(dnp, v3); 2425 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2426 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2427 #ifndef NFS_V2_ONLY 2428 if (v3) 2429 nfsm_wcc_data(dvp, wccflag, 0, !error); 2430 #endif 2431 nfsm_reqdone; 2432 PNBUF_PUT(cnp->cn_pnbuf); 2433 VTONFS(dvp)->n_flag |= NMODIFIED; 2434 if (!wccflag) 2435 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2436 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2437 VN_KNOTE(vp, NOTE_DELETE); 2438 cache_purge(vp); 2439 vput(vp); 2440 vput(dvp); 2441 /* 2442 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2443 */ 2444 if (rexmit && error == ENOENT) 2445 error = 0; 2446 return (error); 2447 } 2448 2449 /* 2450 * nfs readdir call 2451 */ 2452 int 2453 nfs_readdir(v) 2454 void *v; 2455 { 2456 struct vop_readdir_args /* { 2457 struct vnode *a_vp; 2458 struct uio *a_uio; 2459 kauth_cred_t a_cred; 2460 int *a_eofflag; 2461 off_t **a_cookies; 2462 int *a_ncookies; 2463 } */ *ap = v; 2464 struct vnode *vp = ap->a_vp; 2465 struct uio *uio = ap->a_uio; 2466 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2467 char *base = uio->uio_iov->iov_base; 2468 int tresid, error; 2469 size_t count, lost; 2470 struct dirent *dp; 2471 off_t *cookies = NULL; 2472 int ncookies = 0, nc; 2473 2474 if (vp->v_type != VDIR) 2475 return (EPERM); 2476 2477 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2478 count = uio->uio_resid - lost; 2479 if (count <= 0) 2480 return (EINVAL); 2481 2482 /* 2483 * Call nfs_bioread() to do the real work. 2484 */ 2485 tresid = uio->uio_resid = count; 2486 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2487 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2488 2489 if (!error && ap->a_cookies) { 2490 ncookies = count / 16; 2491 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2492 *ap->a_cookies = cookies; 2493 } 2494 2495 if (!error && uio->uio_resid == tresid) { 2496 uio->uio_resid += lost; 2497 nfsstats.direofcache_misses++; 2498 if (ap->a_cookies) 2499 *ap->a_ncookies = 0; 2500 *ap->a_eofflag = 1; 2501 return (0); 2502 } 2503 2504 if (!error && ap->a_cookies) { 2505 /* 2506 * Only the NFS server and emulations use cookies, and they 2507 * load the directory block into system space, so we can 2508 * just look at it directly. 2509 */ 2510 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2511 uio->uio_iovcnt != 1) 2512 panic("nfs_readdir: lost in space"); 2513 for (nc = 0; ncookies-- && 2514 base < (char *)uio->uio_iov->iov_base; nc++){ 2515 dp = (struct dirent *) base; 2516 if (dp->d_reclen == 0) 2517 break; 2518 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2519 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2520 else 2521 *(cookies++) = NFS_GETCOOKIE(dp); 2522 base += dp->d_reclen; 2523 } 2524 uio->uio_resid += 2525 ((caddr_t)uio->uio_iov->iov_base - base); 2526 uio->uio_iov->iov_len += 2527 ((caddr_t)uio->uio_iov->iov_base - base); 2528 uio->uio_iov->iov_base = base; 2529 *ap->a_ncookies = nc; 2530 } 2531 2532 uio->uio_resid += lost; 2533 *ap->a_eofflag = 0; 2534 return (error); 2535 } 2536 2537 /* 2538 * Readdir rpc call. 2539 * Called from below the buffer cache by nfs_doio(). 2540 */ 2541 int 2542 nfs_readdirrpc(vp, uiop, cred) 2543 struct vnode *vp; 2544 struct uio *uiop; 2545 kauth_cred_t cred; 2546 { 2547 int len, left; 2548 struct dirent *dp = NULL; 2549 u_int32_t *tl; 2550 caddr_t cp; 2551 int32_t t1, t2; 2552 caddr_t bpos, dpos, cp2; 2553 struct mbuf *mreq, *mrep, *md, *mb; 2554 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2555 struct nfsnode *dnp = VTONFS(vp); 2556 u_quad_t fileno; 2557 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2558 #ifndef NFS_V2_ONLY 2559 int attrflag; 2560 #endif 2561 int nrpcs = 0, reclen; 2562 const int v3 = NFS_ISV3(vp); 2563 2564 #ifdef DIAGNOSTIC 2565 /* 2566 * Should be called from buffer cache, so only amount of 2567 * NFS_DIRBLKSIZ will be requested. 2568 */ 2569 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2570 panic("nfs readdirrpc bad uio"); 2571 #endif 2572 2573 /* 2574 * Loop around doing readdir rpc's of size nm_readdirsize 2575 * truncated to a multiple of NFS_DIRFRAGSIZ. 2576 * The stopping criteria is EOF or buffer full. 2577 */ 2578 while (more_dirs && bigenough) { 2579 /* 2580 * Heuristic: don't bother to do another RPC to further 2581 * fill up this block if there is not much room left. (< 50% 2582 * of the readdir RPC size). This wastes some buffer space 2583 * but can save up to 50% in RPC calls. 2584 */ 2585 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2586 bigenough = 0; 2587 break; 2588 } 2589 nfsstats.rpccnt[NFSPROC_READDIR]++; 2590 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2591 NFSX_READDIR(v3)); 2592 nfsm_fhtom(dnp, v3); 2593 #ifndef NFS_V2_ONLY 2594 if (v3) { 2595 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2596 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2597 txdr_swapcookie3(uiop->uio_offset, tl); 2598 } else { 2599 txdr_cookie3(uiop->uio_offset, tl); 2600 } 2601 tl += 2; 2602 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2603 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2604 } else 2605 #endif 2606 { 2607 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2608 *tl++ = txdr_unsigned(uiop->uio_offset); 2609 } 2610 *tl = txdr_unsigned(nmp->nm_readdirsize); 2611 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2612 nrpcs++; 2613 #ifndef NFS_V2_ONLY 2614 if (v3) { 2615 nfsm_postop_attr(vp, attrflag, 0); 2616 if (!error) { 2617 nfsm_dissect(tl, u_int32_t *, 2618 2 * NFSX_UNSIGNED); 2619 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2620 dnp->n_cookieverf.nfsuquad[1] = *tl; 2621 } else { 2622 m_freem(mrep); 2623 goto nfsmout; 2624 } 2625 } 2626 #endif 2627 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2628 more_dirs = fxdr_unsigned(int, *tl); 2629 2630 /* loop thru the dir entries, doctoring them to 4bsd form */ 2631 while (more_dirs && bigenough) { 2632 #ifndef NFS_V2_ONLY 2633 if (v3) { 2634 nfsm_dissect(tl, u_int32_t *, 2635 3 * NFSX_UNSIGNED); 2636 fileno = fxdr_hyper(tl); 2637 len = fxdr_unsigned(int, *(tl + 2)); 2638 } else 2639 #endif 2640 { 2641 nfsm_dissect(tl, u_int32_t *, 2642 2 * NFSX_UNSIGNED); 2643 fileno = fxdr_unsigned(u_quad_t, *tl++); 2644 len = fxdr_unsigned(int, *tl); 2645 } 2646 if (len <= 0 || len > NFS_MAXNAMLEN) { 2647 error = EBADRPC; 2648 m_freem(mrep); 2649 goto nfsmout; 2650 } 2651 /* for cookie stashing */ 2652 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2653 left = NFS_DIRFRAGSIZ - blksiz; 2654 if (reclen > left) { 2655 memset(uiop->uio_iov->iov_base, 0, left); 2656 dp->d_reclen += left; 2657 UIO_ADVANCE(uiop, left); 2658 blksiz = 0; 2659 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2660 } 2661 if (reclen > uiop->uio_resid) 2662 bigenough = 0; 2663 if (bigenough) { 2664 int tlen; 2665 2666 dp = (struct dirent *)uiop->uio_iov->iov_base; 2667 dp->d_fileno = fileno; 2668 dp->d_namlen = len; 2669 dp->d_reclen = reclen; 2670 dp->d_type = DT_UNKNOWN; 2671 blksiz += reclen; 2672 if (blksiz == NFS_DIRFRAGSIZ) 2673 blksiz = 0; 2674 UIO_ADVANCE(uiop, DIRHDSIZ); 2675 nfsm_mtouio(uiop, len); 2676 tlen = reclen - (DIRHDSIZ + len); 2677 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2678 UIO_ADVANCE(uiop, tlen); 2679 } else 2680 nfsm_adv(nfsm_rndup(len)); 2681 #ifndef NFS_V2_ONLY 2682 if (v3) { 2683 nfsm_dissect(tl, u_int32_t *, 2684 3 * NFSX_UNSIGNED); 2685 } else 2686 #endif 2687 { 2688 nfsm_dissect(tl, u_int32_t *, 2689 2 * NFSX_UNSIGNED); 2690 } 2691 if (bigenough) { 2692 #ifndef NFS_V2_ONLY 2693 if (v3) { 2694 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2695 uiop->uio_offset = 2696 fxdr_swapcookie3(tl); 2697 else 2698 uiop->uio_offset = 2699 fxdr_cookie3(tl); 2700 } 2701 else 2702 #endif 2703 { 2704 uiop->uio_offset = 2705 fxdr_unsigned(off_t, *tl); 2706 } 2707 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2708 } 2709 if (v3) 2710 tl += 2; 2711 else 2712 tl++; 2713 more_dirs = fxdr_unsigned(int, *tl); 2714 } 2715 /* 2716 * If at end of rpc data, get the eof boolean 2717 */ 2718 if (!more_dirs) { 2719 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2720 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2721 2722 /* 2723 * kludge: if we got no entries, treat it as EOF. 2724 * some server sometimes send a reply without any 2725 * entries or EOF. 2726 * although it might mean the server has very long name, 2727 * we can't handle such entries anyway. 2728 */ 2729 2730 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2731 more_dirs = 0; 2732 } 2733 m_freem(mrep); 2734 } 2735 /* 2736 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2737 * by increasing d_reclen for the last record. 2738 */ 2739 if (blksiz > 0) { 2740 left = NFS_DIRFRAGSIZ - blksiz; 2741 memset(uiop->uio_iov->iov_base, 0, left); 2742 dp->d_reclen += left; 2743 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2744 UIO_ADVANCE(uiop, left); 2745 } 2746 2747 /* 2748 * We are now either at the end of the directory or have filled the 2749 * block. 2750 */ 2751 if (bigenough) { 2752 dnp->n_direofoffset = uiop->uio_offset; 2753 dnp->n_flag |= NEOFVALID; 2754 } 2755 nfsmout: 2756 return (error); 2757 } 2758 2759 #ifndef NFS_V2_ONLY 2760 /* 2761 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2762 */ 2763 int 2764 nfs_readdirplusrpc(vp, uiop, cred) 2765 struct vnode *vp; 2766 struct uio *uiop; 2767 kauth_cred_t cred; 2768 { 2769 int len, left; 2770 struct dirent *dp = NULL; 2771 u_int32_t *tl; 2772 caddr_t cp; 2773 int32_t t1, t2; 2774 struct vnode *newvp; 2775 caddr_t bpos, dpos, cp2; 2776 struct mbuf *mreq, *mrep, *md, *mb; 2777 struct nameidata nami, *ndp = &nami; 2778 struct componentname *cnp = &ndp->ni_cnd; 2779 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2780 struct nfsnode *dnp = VTONFS(vp), *np; 2781 nfsfh_t *fhp; 2782 u_quad_t fileno; 2783 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2784 int attrflag, fhsize, nrpcs = 0, reclen; 2785 struct nfs_fattr fattr, *fp; 2786 2787 #ifdef DIAGNOSTIC 2788 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2789 panic("nfs readdirplusrpc bad uio"); 2790 #endif 2791 ndp->ni_dvp = vp; 2792 newvp = NULLVP; 2793 2794 /* 2795 * Loop around doing readdir rpc's of size nm_readdirsize 2796 * truncated to a multiple of NFS_DIRFRAGSIZ. 2797 * The stopping criteria is EOF or buffer full. 2798 */ 2799 while (more_dirs && bigenough) { 2800 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2801 bigenough = 0; 2802 break; 2803 } 2804 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2805 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2806 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2807 nfsm_fhtom(dnp, 1); 2808 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2809 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2810 txdr_swapcookie3(uiop->uio_offset, tl); 2811 } else { 2812 txdr_cookie3(uiop->uio_offset, tl); 2813 } 2814 tl += 2; 2815 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2816 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2817 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2818 *tl = txdr_unsigned(nmp->nm_rsize); 2819 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2820 nfsm_postop_attr(vp, attrflag, 0); 2821 if (error) { 2822 m_freem(mrep); 2823 goto nfsmout; 2824 } 2825 nrpcs++; 2826 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2827 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2828 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2829 more_dirs = fxdr_unsigned(int, *tl); 2830 2831 /* loop thru the dir entries, doctoring them to 4bsd form */ 2832 while (more_dirs && bigenough) { 2833 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2834 fileno = fxdr_hyper(tl); 2835 len = fxdr_unsigned(int, *(tl + 2)); 2836 if (len <= 0 || len > NFS_MAXNAMLEN) { 2837 error = EBADRPC; 2838 m_freem(mrep); 2839 goto nfsmout; 2840 } 2841 /* for cookie stashing */ 2842 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2843 left = NFS_DIRFRAGSIZ - blksiz; 2844 if (reclen > left) { 2845 /* 2846 * DIRFRAGSIZ is aligned, no need to align 2847 * again here. 2848 */ 2849 memset(uiop->uio_iov->iov_base, 0, left); 2850 dp->d_reclen += left; 2851 UIO_ADVANCE(uiop, left); 2852 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2853 blksiz = 0; 2854 } 2855 if (reclen > uiop->uio_resid) 2856 bigenough = 0; 2857 if (bigenough) { 2858 int tlen; 2859 2860 dp = (struct dirent *)uiop->uio_iov->iov_base; 2861 dp->d_fileno = fileno; 2862 dp->d_namlen = len; 2863 dp->d_reclen = reclen; 2864 dp->d_type = DT_UNKNOWN; 2865 blksiz += reclen; 2866 if (blksiz == NFS_DIRFRAGSIZ) 2867 blksiz = 0; 2868 UIO_ADVANCE(uiop, DIRHDSIZ); 2869 nfsm_mtouio(uiop, len); 2870 tlen = reclen - (DIRHDSIZ + len); 2871 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2872 UIO_ADVANCE(uiop, tlen); 2873 cnp->cn_nameptr = dp->d_name; 2874 cnp->cn_namelen = dp->d_namlen; 2875 } else 2876 nfsm_adv(nfsm_rndup(len)); 2877 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2878 if (bigenough) { 2879 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2880 uiop->uio_offset = 2881 fxdr_swapcookie3(tl); 2882 else 2883 uiop->uio_offset = 2884 fxdr_cookie3(tl); 2885 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2886 } 2887 tl += 2; 2888 2889 /* 2890 * Since the attributes are before the file handle 2891 * (sigh), we must skip over the attributes and then 2892 * come back and get them. 2893 */ 2894 attrflag = fxdr_unsigned(int, *tl); 2895 if (attrflag) { 2896 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2897 memcpy(&fattr, fp, NFSX_V3FATTR); 2898 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2899 doit = fxdr_unsigned(int, *tl); 2900 if (doit) { 2901 nfsm_getfh(fhp, fhsize, 1); 2902 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2903 VREF(vp); 2904 newvp = vp; 2905 np = dnp; 2906 } else { 2907 error = nfs_nget1(vp->v_mount, fhp, 2908 fhsize, &np, LK_NOWAIT); 2909 if (!error) 2910 newvp = NFSTOV(np); 2911 } 2912 if (!error) { 2913 const char *xcp; 2914 2915 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2916 if (bigenough) { 2917 dp->d_type = 2918 IFTODT(VTTOIF(np->n_vattr->va_type)); 2919 if (cnp->cn_namelen <= NCHNAMLEN) { 2920 ndp->ni_vp = newvp; 2921 xcp = cnp->cn_nameptr + 2922 cnp->cn_namelen; 2923 cnp->cn_hash = 2924 namei_hash(cnp->cn_nameptr, &xcp); 2925 nfs_cache_enter(ndp->ni_dvp, 2926 ndp->ni_vp, cnp); 2927 } 2928 } 2929 } 2930 error = 0; 2931 } 2932 } else { 2933 /* Just skip over the file handle */ 2934 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2935 i = fxdr_unsigned(int, *tl); 2936 nfsm_adv(nfsm_rndup(i)); 2937 } 2938 if (newvp != NULLVP) { 2939 if (newvp == vp) 2940 vrele(newvp); 2941 else 2942 vput(newvp); 2943 newvp = NULLVP; 2944 } 2945 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2946 more_dirs = fxdr_unsigned(int, *tl); 2947 } 2948 /* 2949 * If at end of rpc data, get the eof boolean 2950 */ 2951 if (!more_dirs) { 2952 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2953 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2954 2955 /* 2956 * kludge: see a comment in nfs_readdirrpc. 2957 */ 2958 2959 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2960 more_dirs = 0; 2961 } 2962 m_freem(mrep); 2963 } 2964 /* 2965 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2966 * by increasing d_reclen for the last record. 2967 */ 2968 if (blksiz > 0) { 2969 left = NFS_DIRFRAGSIZ - blksiz; 2970 memset(uiop->uio_iov->iov_base, 0, left); 2971 dp->d_reclen += left; 2972 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2973 UIO_ADVANCE(uiop, left); 2974 } 2975 2976 /* 2977 * We are now either at the end of the directory or have filled the 2978 * block. 2979 */ 2980 if (bigenough) { 2981 dnp->n_direofoffset = uiop->uio_offset; 2982 dnp->n_flag |= NEOFVALID; 2983 } 2984 nfsmout: 2985 if (newvp != NULLVP) { 2986 if(newvp == vp) 2987 vrele(newvp); 2988 else 2989 vput(newvp); 2990 } 2991 return (error); 2992 } 2993 #endif 2994 2995 /* 2996 * Silly rename. To make the NFS filesystem that is stateless look a little 2997 * more like the "ufs" a remove of an active vnode is translated to a rename 2998 * to a funny looking filename that is removed by nfs_inactive on the 2999 * nfsnode. There is the potential for another process on a different client 3000 * to create the same funny name between the nfs_lookitup() fails and the 3001 * nfs_rename() completes, but... 3002 */ 3003 int 3004 nfs_sillyrename(dvp, vp, cnp, dolink) 3005 struct vnode *dvp, *vp; 3006 struct componentname *cnp; 3007 boolean_t dolink; 3008 { 3009 struct sillyrename *sp; 3010 struct nfsnode *np; 3011 int error; 3012 short pid; 3013 3014 cache_purge(dvp); 3015 np = VTONFS(vp); 3016 #ifndef DIAGNOSTIC 3017 if (vp->v_type == VDIR) 3018 panic("nfs: sillyrename dir"); 3019 #endif 3020 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3021 M_NFSREQ, M_WAITOK); 3022 sp->s_cred = kauth_cred_dup(cnp->cn_cred); 3023 sp->s_dvp = dvp; 3024 VREF(dvp); 3025 3026 /* Fudge together a funny name */ 3027 pid = cnp->cn_lwp->l_proc->p_pid; 3028 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3029 sp->s_namlen = 12; 3030 sp->s_name[8] = hexdigits[pid & 0xf]; 3031 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3032 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3033 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3034 3035 /* Try lookitups until we get one that isn't there */ 3036 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3037 cnp->cn_lwp, (struct nfsnode **)0) == 0) { 3038 sp->s_name[4]++; 3039 if (sp->s_name[4] > 'z') { 3040 error = EINVAL; 3041 goto bad; 3042 } 3043 } 3044 if (dolink) { 3045 error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, 3046 sp->s_cred, cnp->cn_lwp); 3047 /* 3048 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 3049 */ 3050 if (error == ENOTSUP) { 3051 error = nfs_renameit(dvp, cnp, sp); 3052 } 3053 } else { 3054 error = nfs_renameit(dvp, cnp, sp); 3055 } 3056 if (error) 3057 goto bad; 3058 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3059 cnp->cn_lwp, &np); 3060 np->n_sillyrename = sp; 3061 return (0); 3062 bad: 3063 vrele(sp->s_dvp); 3064 kauth_cred_free(sp->s_cred); 3065 free((caddr_t)sp, M_NFSREQ); 3066 return (error); 3067 } 3068 3069 /* 3070 * Look up a file name and optionally either update the file handle or 3071 * allocate an nfsnode, depending on the value of npp. 3072 * npp == NULL --> just do the lookup 3073 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3074 * handled too 3075 * *npp != NULL --> update the file handle in the vnode 3076 */ 3077 int 3078 nfs_lookitup(dvp, name, len, cred, l, npp) 3079 struct vnode *dvp; 3080 const char *name; 3081 int len; 3082 kauth_cred_t cred; 3083 struct lwp *l; 3084 struct nfsnode **npp; 3085 { 3086 u_int32_t *tl; 3087 caddr_t cp; 3088 int32_t t1, t2; 3089 struct vnode *newvp = (struct vnode *)0; 3090 struct nfsnode *np, *dnp = VTONFS(dvp); 3091 caddr_t bpos, dpos, cp2; 3092 int error = 0, fhlen; 3093 #ifndef NFS_V2_ONLY 3094 int attrflag; 3095 #endif 3096 struct mbuf *mreq, *mrep, *md, *mb; 3097 nfsfh_t *nfhp; 3098 const int v3 = NFS_ISV3(dvp); 3099 3100 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3101 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3102 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3103 nfsm_fhtom(dnp, v3); 3104 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3105 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3106 if (npp && !error) { 3107 nfsm_getfh(nfhp, fhlen, v3); 3108 if (*npp) { 3109 np = *npp; 3110 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3111 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3112 np->n_fhp = &np->n_fh; 3113 } 3114 #if NFS_SMALLFH < NFSX_V3FHMAX 3115 else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3116 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3117 #endif 3118 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3119 np->n_fhsize = fhlen; 3120 newvp = NFSTOV(np); 3121 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3122 VREF(dvp); 3123 newvp = dvp; 3124 np = dnp; 3125 } else { 3126 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3127 if (error) { 3128 m_freem(mrep); 3129 return (error); 3130 } 3131 newvp = NFSTOV(np); 3132 } 3133 #ifndef NFS_V2_ONLY 3134 if (v3) { 3135 nfsm_postop_attr(newvp, attrflag, 0); 3136 if (!attrflag && *npp == NULL) { 3137 m_freem(mrep); 3138 vput(newvp); 3139 return (ENOENT); 3140 } 3141 } else 3142 #endif 3143 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3144 } 3145 nfsm_reqdone; 3146 if (npp && *npp == NULL) { 3147 if (error) { 3148 if (newvp) 3149 vput(newvp); 3150 } else 3151 *npp = np; 3152 } 3153 return (error); 3154 } 3155 3156 #ifndef NFS_V2_ONLY 3157 /* 3158 * Nfs Version 3 commit rpc 3159 */ 3160 int 3161 nfs_commit(vp, offset, cnt, l) 3162 struct vnode *vp; 3163 off_t offset; 3164 uint32_t cnt; 3165 struct lwp *l; 3166 { 3167 caddr_t cp; 3168 u_int32_t *tl; 3169 int32_t t1, t2; 3170 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3171 caddr_t bpos, dpos, cp2; 3172 int error = 0, wccflag = NFSV3_WCCRATTR; 3173 struct mbuf *mreq, *mrep, *md, *mb; 3174 struct nfsnode *np; 3175 3176 KASSERT(NFS_ISV3(vp)); 3177 3178 #ifdef NFS_DEBUG_COMMIT 3179 printf("commit %lu - %lu\n", (unsigned long)offset, 3180 (unsigned long)(offset + cnt)); 3181 #endif 3182 3183 simple_lock(&nmp->nm_slock); 3184 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3185 simple_unlock(&nmp->nm_slock); 3186 return (0); 3187 } 3188 simple_unlock(&nmp->nm_slock); 3189 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3190 np = VTONFS(vp); 3191 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3192 nfsm_fhtom(np, 1); 3193 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3194 txdr_hyper(offset, tl); 3195 tl += 2; 3196 *tl = txdr_unsigned(cnt); 3197 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3198 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3199 if (!error) { 3200 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3201 simple_lock(&nmp->nm_slock); 3202 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3203 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3204 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3205 error = NFSERR_STALEWRITEVERF; 3206 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3207 } 3208 simple_unlock(&nmp->nm_slock); 3209 } 3210 nfsm_reqdone; 3211 return (error); 3212 } 3213 #endif 3214 3215 /* 3216 * Kludge City.. 3217 * - make nfs_bmap() essentially a no-op that does no translation 3218 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3219 * (Maybe I could use the process's page mapping, but I was concerned that 3220 * Kernel Write might not be enabled and also figured copyout() would do 3221 * a lot more work than memcpy() and also it currently happens in the 3222 * context of the swapper process (2). 3223 */ 3224 int 3225 nfs_bmap(v) 3226 void *v; 3227 { 3228 struct vop_bmap_args /* { 3229 struct vnode *a_vp; 3230 daddr_t a_bn; 3231 struct vnode **a_vpp; 3232 daddr_t *a_bnp; 3233 int *a_runp; 3234 } */ *ap = v; 3235 struct vnode *vp = ap->a_vp; 3236 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3237 3238 if (ap->a_vpp != NULL) 3239 *ap->a_vpp = vp; 3240 if (ap->a_bnp != NULL) 3241 *ap->a_bnp = ap->a_bn << bshift; 3242 if (ap->a_runp != NULL) 3243 *ap->a_runp = 1024 * 1024; /* XXX */ 3244 return (0); 3245 } 3246 3247 /* 3248 * Strategy routine. 3249 * For async requests when nfsiod(s) are running, queue the request by 3250 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3251 * request. 3252 */ 3253 int 3254 nfs_strategy(v) 3255 void *v; 3256 { 3257 struct vop_strategy_args *ap = v; 3258 struct buf *bp = ap->a_bp; 3259 int error = 0; 3260 3261 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3262 panic("nfs physio/async"); 3263 3264 /* 3265 * If the op is asynchronous and an i/o daemon is waiting 3266 * queue the request, wake it up and wait for completion 3267 * otherwise just do it ourselves. 3268 */ 3269 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3270 error = nfs_doio(bp); 3271 return (error); 3272 } 3273 3274 /* 3275 * fsync vnode op. Just call nfs_flush() with commit == 1. 3276 */ 3277 /* ARGSUSED */ 3278 int 3279 nfs_fsync(v) 3280 void *v; 3281 { 3282 struct vop_fsync_args /* { 3283 struct vnodeop_desc *a_desc; 3284 struct vnode * a_vp; 3285 kauth_cred_t a_cred; 3286 int a_flags; 3287 off_t offlo; 3288 off_t offhi; 3289 struct lwp * a_l; 3290 } */ *ap = v; 3291 3292 struct vnode *vp = ap->a_vp; 3293 3294 if (vp->v_type != VREG) 3295 return 0; 3296 3297 return (nfs_flush(vp, ap->a_cred, 3298 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_l, 1)); 3299 } 3300 3301 /* 3302 * Flush all the data associated with a vnode. 3303 */ 3304 int 3305 nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, 3306 int commit) 3307 { 3308 struct nfsnode *np = VTONFS(vp); 3309 int error; 3310 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3311 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3312 3313 simple_lock(&vp->v_interlock); 3314 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3315 if (np->n_flag & NWRITEERR) { 3316 error = np->n_error; 3317 np->n_flag &= ~NWRITEERR; 3318 } 3319 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3320 return (error); 3321 } 3322 3323 /* 3324 * Return POSIX pathconf information applicable to nfs. 3325 * 3326 * N.B. The NFS V2 protocol doesn't support this RPC. 3327 */ 3328 /* ARGSUSED */ 3329 int 3330 nfs_pathconf(v) 3331 void *v; 3332 { 3333 struct vop_pathconf_args /* { 3334 struct vnode *a_vp; 3335 int a_name; 3336 register_t *a_retval; 3337 } */ *ap = v; 3338 struct nfsv3_pathconf *pcp; 3339 struct vnode *vp = ap->a_vp; 3340 struct mbuf *mreq, *mrep, *md, *mb; 3341 int32_t t1, t2; 3342 u_int32_t *tl; 3343 caddr_t bpos, dpos, cp, cp2; 3344 int error = 0, attrflag; 3345 #ifndef NFS_V2_ONLY 3346 struct nfsmount *nmp; 3347 unsigned int l; 3348 u_int64_t maxsize; 3349 #endif 3350 const int v3 = NFS_ISV3(vp); 3351 struct nfsnode *np = VTONFS(vp); 3352 3353 switch (ap->a_name) { 3354 /* Names that can be resolved locally. */ 3355 case _PC_PIPE_BUF: 3356 *ap->a_retval = PIPE_BUF; 3357 break; 3358 case _PC_SYNC_IO: 3359 *ap->a_retval = 1; 3360 break; 3361 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3362 case _PC_LINK_MAX: 3363 case _PC_NAME_MAX: 3364 case _PC_CHOWN_RESTRICTED: 3365 case _PC_NO_TRUNC: 3366 if (!v3) { 3367 error = EINVAL; 3368 break; 3369 } 3370 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3371 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3372 nfsm_fhtom(np, 1); 3373 nfsm_request(np, NFSPROC_PATHCONF, 3374 curlwp, curlwp->l_cred); /* XXX */ 3375 nfsm_postop_attr(vp, attrflag, 0); 3376 if (!error) { 3377 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3378 NFSX_V3PATHCONF); 3379 switch (ap->a_name) { 3380 case _PC_LINK_MAX: 3381 *ap->a_retval = 3382 fxdr_unsigned(register_t, pcp->pc_linkmax); 3383 break; 3384 case _PC_NAME_MAX: 3385 *ap->a_retval = 3386 fxdr_unsigned(register_t, pcp->pc_namemax); 3387 break; 3388 case _PC_CHOWN_RESTRICTED: 3389 *ap->a_retval = 3390 (pcp->pc_chownrestricted == nfs_true); 3391 break; 3392 case _PC_NO_TRUNC: 3393 *ap->a_retval = 3394 (pcp->pc_notrunc == nfs_true); 3395 break; 3396 } 3397 } 3398 nfsm_reqdone; 3399 break; 3400 case _PC_FILESIZEBITS: 3401 #ifndef NFS_V2_ONLY 3402 if (v3) { 3403 nmp = VFSTONFS(vp->v_mount); 3404 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3405 if ((error = nfs_fsinfo(nmp, vp, 3406 curlwp->l_cred, curlwp)) != 0) /* XXX */ 3407 break; 3408 for (l = 0, maxsize = nmp->nm_maxfilesize; 3409 (maxsize >> l) > 0; l++) 3410 ; 3411 *ap->a_retval = l + 1; 3412 } else 3413 #endif 3414 { 3415 *ap->a_retval = 32; /* NFS V2 limitation */ 3416 } 3417 break; 3418 default: 3419 error = EINVAL; 3420 break; 3421 } 3422 3423 return (error); 3424 } 3425 3426 /* 3427 * NFS advisory byte-level locks. 3428 */ 3429 int 3430 nfs_advlock(v) 3431 void *v; 3432 { 3433 struct vop_advlock_args /* { 3434 struct vnode *a_vp; 3435 caddr_t a_id; 3436 int a_op; 3437 struct flock *a_fl; 3438 int a_flags; 3439 } */ *ap = v; 3440 struct nfsnode *np = VTONFS(ap->a_vp); 3441 3442 return lf_advlock(ap, &np->n_lockf, np->n_size); 3443 } 3444 3445 /* 3446 * Print out the contents of an nfsnode. 3447 */ 3448 int 3449 nfs_print(v) 3450 void *v; 3451 { 3452 struct vop_print_args /* { 3453 struct vnode *a_vp; 3454 } */ *ap = v; 3455 struct vnode *vp = ap->a_vp; 3456 struct nfsnode *np = VTONFS(vp); 3457 3458 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3459 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3460 if (vp->v_type == VFIFO) 3461 fifo_printinfo(vp); 3462 printf("\n"); 3463 return (0); 3464 } 3465 3466 /* 3467 * nfs unlock wrapper. 3468 */ 3469 int 3470 nfs_unlock(void *v) 3471 { 3472 struct vop_unlock_args /* { 3473 struct vnode *a_vp; 3474 int a_flags; 3475 } */ *ap = v; 3476 struct vnode *vp = ap->a_vp; 3477 3478 /* 3479 * VOP_UNLOCK can be called by nfs_loadattrcache 3480 * with v_data == 0. 3481 */ 3482 if (VTONFS(vp)) { 3483 nfs_delayedtruncate(vp); 3484 } 3485 3486 return genfs_unlock(v); 3487 } 3488 3489 /* 3490 * nfs special file access vnode op. 3491 * Essentially just get vattr and then imitate iaccess() since the device is 3492 * local to the client. 3493 */ 3494 int 3495 nfsspec_access(v) 3496 void *v; 3497 { 3498 struct vop_access_args /* { 3499 struct vnode *a_vp; 3500 int a_mode; 3501 kauth_cred_t a_cred; 3502 struct lwp *a_l; 3503 } */ *ap = v; 3504 struct vattr va; 3505 struct vnode *vp = ap->a_vp; 3506 int error; 3507 3508 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_l); 3509 if (error) 3510 return (error); 3511 3512 /* 3513 * Disallow write attempts on filesystems mounted read-only; 3514 * unless the file is a socket, fifo, or a block or character 3515 * device resident on the filesystem. 3516 */ 3517 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3518 switch (vp->v_type) { 3519 case VREG: 3520 case VDIR: 3521 case VLNK: 3522 return (EROFS); 3523 default: 3524 break; 3525 } 3526 } 3527 3528 return (vaccess(va.va_type, va.va_mode, 3529 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3530 } 3531 3532 /* 3533 * Read wrapper for special devices. 3534 */ 3535 int 3536 nfsspec_read(v) 3537 void *v; 3538 { 3539 struct vop_read_args /* { 3540 struct vnode *a_vp; 3541 struct uio *a_uio; 3542 int a_ioflag; 3543 kauth_cred_t a_cred; 3544 } */ *ap = v; 3545 struct nfsnode *np = VTONFS(ap->a_vp); 3546 3547 /* 3548 * Set access flag. 3549 */ 3550 np->n_flag |= NACC; 3551 getnanotime(&np->n_atim); 3552 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3553 } 3554 3555 /* 3556 * Write wrapper for special devices. 3557 */ 3558 int 3559 nfsspec_write(v) 3560 void *v; 3561 { 3562 struct vop_write_args /* { 3563 struct vnode *a_vp; 3564 struct uio *a_uio; 3565 int a_ioflag; 3566 kauth_cred_t a_cred; 3567 } */ *ap = v; 3568 struct nfsnode *np = VTONFS(ap->a_vp); 3569 3570 /* 3571 * Set update flag. 3572 */ 3573 np->n_flag |= NUPD; 3574 getnanotime(&np->n_mtim); 3575 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3576 } 3577 3578 /* 3579 * Close wrapper for special devices. 3580 * 3581 * Update the times on the nfsnode then do device close. 3582 */ 3583 int 3584 nfsspec_close(v) 3585 void *v; 3586 { 3587 struct vop_close_args /* { 3588 struct vnode *a_vp; 3589 int a_fflag; 3590 kauth_cred_t a_cred; 3591 struct lwp *a_l; 3592 } */ *ap = v; 3593 struct vnode *vp = ap->a_vp; 3594 struct nfsnode *np = VTONFS(vp); 3595 struct vattr vattr; 3596 3597 if (np->n_flag & (NACC | NUPD)) { 3598 np->n_flag |= NCHG; 3599 if (vp->v_usecount == 1 && 3600 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3601 VATTR_NULL(&vattr); 3602 if (np->n_flag & NACC) 3603 vattr.va_atime = np->n_atim; 3604 if (np->n_flag & NUPD) 3605 vattr.va_mtime = np->n_mtim; 3606 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3607 } 3608 } 3609 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3610 } 3611 3612 /* 3613 * Read wrapper for fifos. 3614 */ 3615 int 3616 nfsfifo_read(v) 3617 void *v; 3618 { 3619 struct vop_read_args /* { 3620 struct vnode *a_vp; 3621 struct uio *a_uio; 3622 int a_ioflag; 3623 kauth_cred_t a_cred; 3624 } */ *ap = v; 3625 struct nfsnode *np = VTONFS(ap->a_vp); 3626 3627 /* 3628 * Set access flag. 3629 */ 3630 np->n_flag |= NACC; 3631 getnanotime(&np->n_atim); 3632 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3633 } 3634 3635 /* 3636 * Write wrapper for fifos. 3637 */ 3638 int 3639 nfsfifo_write(v) 3640 void *v; 3641 { 3642 struct vop_write_args /* { 3643 struct vnode *a_vp; 3644 struct uio *a_uio; 3645 int a_ioflag; 3646 kauth_cred_t a_cred; 3647 } */ *ap = v; 3648 struct nfsnode *np = VTONFS(ap->a_vp); 3649 3650 /* 3651 * Set update flag. 3652 */ 3653 np->n_flag |= NUPD; 3654 getnanotime(&np->n_mtim); 3655 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3656 } 3657 3658 /* 3659 * Close wrapper for fifos. 3660 * 3661 * Update the times on the nfsnode then do fifo close. 3662 */ 3663 int 3664 nfsfifo_close(v) 3665 void *v; 3666 { 3667 struct vop_close_args /* { 3668 struct vnode *a_vp; 3669 int a_fflag; 3670 kauth_cred_t a_cred; 3671 struct lwp *a_l; 3672 } */ *ap = v; 3673 struct vnode *vp = ap->a_vp; 3674 struct nfsnode *np = VTONFS(vp); 3675 struct vattr vattr; 3676 3677 if (np->n_flag & (NACC | NUPD)) { 3678 struct timespec ts; 3679 3680 getnanotime(&ts); 3681 if (np->n_flag & NACC) 3682 np->n_atim = ts; 3683 if (np->n_flag & NUPD) 3684 np->n_mtim = ts; 3685 np->n_flag |= NCHG; 3686 if (vp->v_usecount == 1 && 3687 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3688 VATTR_NULL(&vattr); 3689 if (np->n_flag & NACC) 3690 vattr.va_atime = np->n_atim; 3691 if (np->n_flag & NUPD) 3692 vattr.va_mtime = np->n_mtim; 3693 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3694 } 3695 } 3696 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3697 }
Cache object: f67eb2ae5fd9b8837219e4298de77b52
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