nfs_vnops.c revision 1.203
1 /* $NetBSD: nfs_vnops.c,v 1.203 2004/06/27 08:53:03 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.203 2004/06/27 08:53:03 yamt Exp $"); 43 44 #include "opt_nfs.h" 45 #include "opt_uvmhist.h" 46 47 #include <sys/param.h> 48 #include <sys/proc.h> 49 #include <sys/kernel.h> 50 #include <sys/systm.h> 51 #include <sys/resourcevar.h> 52 #include <sys/proc.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/namei.h> 58 #include <sys/vnode.h> 59 #include <sys/dirent.h> 60 #include <sys/fcntl.h> 61 #include <sys/hash.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* 88 * Global vfs data structures for nfs 89 */ 90 int (**nfsv2_vnodeop_p) __P((void *)); 91 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 92 { &vop_default_desc, vn_default_error }, 93 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 94 { &vop_create_desc, nfs_create }, /* create */ 95 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 96 { &vop_open_desc, nfs_open }, /* open */ 97 { &vop_close_desc, nfs_close }, /* close */ 98 { &vop_access_desc, nfs_access }, /* access */ 99 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 100 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 101 { &vop_read_desc, nfs_read }, /* read */ 102 { &vop_write_desc, nfs_write }, /* write */ 103 { &vop_lease_desc, nfs_lease_check }, /* lease */ 104 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 105 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 106 { &vop_poll_desc, nfs_poll }, /* poll */ 107 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 108 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 109 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 110 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 111 { &vop_seek_desc, nfs_seek }, /* seek */ 112 { &vop_remove_desc, nfs_remove }, /* remove */ 113 { &vop_link_desc, nfs_link }, /* link */ 114 { &vop_rename_desc, nfs_rename }, /* rename */ 115 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 116 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 117 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 118 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 119 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 120 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 121 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 122 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 123 { &vop_lock_desc, nfs_lock }, /* lock */ 124 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 125 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 126 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 127 { &vop_print_desc, nfs_print }, /* print */ 128 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 129 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 130 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 131 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 132 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 133 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 134 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 135 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 136 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 137 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 138 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 139 { NULL, NULL } 140 }; 141 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 142 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 143 144 /* 145 * Special device vnode ops 146 */ 147 int (**spec_nfsv2nodeop_p) __P((void *)); 148 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 149 { &vop_default_desc, vn_default_error }, 150 { &vop_lookup_desc, spec_lookup }, /* lookup */ 151 { &vop_create_desc, spec_create }, /* create */ 152 { &vop_mknod_desc, spec_mknod }, /* mknod */ 153 { &vop_open_desc, spec_open }, /* open */ 154 { &vop_close_desc, nfsspec_close }, /* close */ 155 { &vop_access_desc, nfsspec_access }, /* access */ 156 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 157 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 158 { &vop_read_desc, nfsspec_read }, /* read */ 159 { &vop_write_desc, nfsspec_write }, /* write */ 160 { &vop_lease_desc, spec_lease_check }, /* lease */ 161 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 162 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 163 { &vop_poll_desc, spec_poll }, /* poll */ 164 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 165 { &vop_revoke_desc, spec_revoke }, /* revoke */ 166 { &vop_mmap_desc, spec_mmap }, /* mmap */ 167 { &vop_fsync_desc, spec_fsync }, /* fsync */ 168 { &vop_seek_desc, spec_seek }, /* seek */ 169 { &vop_remove_desc, spec_remove }, /* remove */ 170 { &vop_link_desc, spec_link }, /* link */ 171 { &vop_rename_desc, spec_rename }, /* rename */ 172 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 173 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 174 { &vop_symlink_desc, spec_symlink }, /* symlink */ 175 { &vop_readdir_desc, spec_readdir }, /* readdir */ 176 { &vop_readlink_desc, spec_readlink }, /* readlink */ 177 { &vop_abortop_desc, spec_abortop }, /* abortop */ 178 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 179 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 180 { &vop_lock_desc, nfs_lock }, /* lock */ 181 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 182 { &vop_bmap_desc, spec_bmap }, /* bmap */ 183 { &vop_strategy_desc, spec_strategy }, /* strategy */ 184 { &vop_print_desc, nfs_print }, /* print */ 185 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 186 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 187 { &vop_advlock_desc, spec_advlock }, /* advlock */ 188 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 189 { &vop_valloc_desc, spec_valloc }, /* valloc */ 190 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 191 { &vop_vfree_desc, spec_vfree }, /* vfree */ 192 { &vop_truncate_desc, spec_truncate }, /* truncate */ 193 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 194 { &vop_getpages_desc, spec_getpages }, /* getpages */ 195 { &vop_putpages_desc, spec_putpages }, /* putpages */ 196 { NULL, NULL } 197 }; 198 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 199 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 200 201 int (**fifo_nfsv2nodeop_p) __P((void *)); 202 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 203 { &vop_default_desc, vn_default_error }, 204 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 205 { &vop_create_desc, fifo_create }, /* create */ 206 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 207 { &vop_open_desc, fifo_open }, /* open */ 208 { &vop_close_desc, nfsfifo_close }, /* close */ 209 { &vop_access_desc, nfsspec_access }, /* access */ 210 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 211 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 212 { &vop_read_desc, nfsfifo_read }, /* read */ 213 { &vop_write_desc, nfsfifo_write }, /* write */ 214 { &vop_lease_desc, fifo_lease_check }, /* lease */ 215 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 216 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 217 { &vop_poll_desc, fifo_poll }, /* poll */ 218 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 219 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 220 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 221 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 222 { &vop_seek_desc, fifo_seek }, /* seek */ 223 { &vop_remove_desc, fifo_remove }, /* remove */ 224 { &vop_link_desc, fifo_link }, /* link */ 225 { &vop_rename_desc, fifo_rename }, /* rename */ 226 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 227 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 228 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 229 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 230 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 231 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 232 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 233 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 234 { &vop_lock_desc, nfs_lock }, /* lock */ 235 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 236 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 237 { &vop_strategy_desc, genfs_badop }, /* strategy */ 238 { &vop_print_desc, nfs_print }, /* print */ 239 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 240 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 241 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 242 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 243 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 244 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 245 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 246 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 247 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 248 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 249 { NULL, NULL } 250 }; 251 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 252 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 253 254 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 255 256 /* 257 * Global variables 258 */ 259 extern u_int32_t nfs_true, nfs_false; 260 extern u_int32_t nfs_xdrneg1; 261 extern const nfstype nfsv3_type[9]; 262 263 int nfs_numasync = 0; 264 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 265 266 static void nfs_cache_enter(struct vnode *, struct vnode *, 267 struct componentname *); 268 269 static void 270 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 271 struct componentname *cnp) 272 { 273 274 if (vp != NULL) { 275 struct nfsnode *np = VTONFS(vp); 276 277 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 278 } else { 279 struct nfsnode *dnp = VTONFS(dvp); 280 281 if (!timespecisset(&dnp->n_nctime)) 282 dnp->n_nctime = dnp->n_vattr->va_mtime; 283 } 284 285 cache_enter(dvp, vp, cnp); 286 } 287 288 /* 289 * nfs null call from vfs. 290 */ 291 int 292 nfs_null(vp, cred, procp) 293 struct vnode *vp; 294 struct ucred *cred; 295 struct proc *procp; 296 { 297 caddr_t bpos, dpos; 298 int error = 0; 299 struct mbuf *mreq, *mrep, *md, *mb; 300 struct nfsnode *np = VTONFS(vp); 301 302 nfsm_reqhead(np, NFSPROC_NULL, 0); 303 nfsm_request(np, NFSPROC_NULL, procp, cred); 304 nfsm_reqdone; 305 return (error); 306 } 307 308 /* 309 * nfs access vnode op. 310 * For nfs version 2, just return ok. File accesses may fail later. 311 * For nfs version 3, use the access rpc to check accessibility. If file modes 312 * are changed on the server, accesses might still fail later. 313 */ 314 int 315 nfs_access(v) 316 void *v; 317 { 318 struct vop_access_args /* { 319 struct vnode *a_vp; 320 int a_mode; 321 struct ucred *a_cred; 322 struct proc *a_p; 323 } */ *ap = v; 324 struct vnode *vp = ap->a_vp; 325 #ifndef NFS_V2_ONLY 326 u_int32_t *tl; 327 caddr_t cp; 328 int32_t t1, t2; 329 caddr_t bpos, dpos, cp2; 330 int error = 0, attrflag; 331 struct mbuf *mreq, *mrep, *md, *mb; 332 u_int32_t mode, rmode; 333 const int v3 = NFS_ISV3(vp); 334 #endif 335 int cachevalid; 336 struct nfsnode *np = VTONFS(vp); 337 338 cachevalid = (np->n_accstamp != -1 && 339 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 340 np->n_accuid == ap->a_cred->cr_uid); 341 342 /* 343 * Check access cache first. If this request has been made for this 344 * uid shortly before, use the cached result. 345 */ 346 if (cachevalid) { 347 if (!np->n_accerror) { 348 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 349 return np->n_accerror; 350 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 351 return np->n_accerror; 352 } 353 354 #ifndef NFS_V2_ONLY 355 /* 356 * For nfs v3, do an access rpc, otherwise you are stuck emulating 357 * ufs_access() locally using the vattr. This may not be correct, 358 * since the server may apply other access criteria such as 359 * client uid-->server uid mapping that we do not know about, but 360 * this is better than just returning anything that is lying about 361 * in the cache. 362 */ 363 if (v3) { 364 nfsstats.rpccnt[NFSPROC_ACCESS]++; 365 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 366 nfsm_fhtom(np, v3); 367 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 368 if (ap->a_mode & VREAD) 369 mode = NFSV3ACCESS_READ; 370 else 371 mode = 0; 372 if (vp->v_type != VDIR) { 373 if (ap->a_mode & VWRITE) 374 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 375 if (ap->a_mode & VEXEC) 376 mode |= NFSV3ACCESS_EXECUTE; 377 } else { 378 if (ap->a_mode & VWRITE) 379 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 380 NFSV3ACCESS_DELETE); 381 if (ap->a_mode & VEXEC) 382 mode |= NFSV3ACCESS_LOOKUP; 383 } 384 *tl = txdr_unsigned(mode); 385 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 386 nfsm_postop_attr(vp, attrflag, 0); 387 if (!error) { 388 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 389 rmode = fxdr_unsigned(u_int32_t, *tl); 390 /* 391 * The NFS V3 spec does not clarify whether or not 392 * the returned access bits can be a superset of 393 * the ones requested, so... 394 */ 395 if ((rmode & mode) != mode) 396 error = EACCES; 397 } 398 nfsm_reqdone; 399 } else 400 #endif 401 return (nfsspec_access(ap)); 402 #ifndef NFS_V2_ONLY 403 /* 404 * Disallow write attempts on filesystems mounted read-only; 405 * unless the file is a socket, fifo, or a block or character 406 * device resident on the filesystem. 407 */ 408 if (!error && (ap->a_mode & VWRITE) && 409 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 410 switch (vp->v_type) { 411 case VREG: 412 case VDIR: 413 case VLNK: 414 error = EROFS; 415 default: 416 break; 417 } 418 } 419 420 if (!error || error == EACCES) { 421 /* 422 * If we got the same result as for a previous, 423 * different request, OR it in. Don't update 424 * the timestamp in that case. 425 */ 426 if (cachevalid && np->n_accstamp != -1 && 427 error == np->n_accerror) { 428 if (!error) 429 np->n_accmode |= ap->a_mode; 430 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 431 np->n_accmode = ap->a_mode; 432 } else { 433 np->n_accstamp = time.tv_sec; 434 np->n_accuid = ap->a_cred->cr_uid; 435 np->n_accmode = ap->a_mode; 436 np->n_accerror = error; 437 } 438 } 439 440 return (error); 441 #endif 442 } 443 444 /* 445 * nfs open vnode op 446 * Check to see if the type is ok 447 * and that deletion is not in progress. 448 * For paged in text files, you will need to flush the page cache 449 * if consistency is lost. 450 */ 451 /* ARGSUSED */ 452 int 453 nfs_open(v) 454 void *v; 455 { 456 struct vop_open_args /* { 457 struct vnode *a_vp; 458 int a_mode; 459 struct ucred *a_cred; 460 struct proc *a_p; 461 } */ *ap = v; 462 struct vnode *vp = ap->a_vp; 463 struct nfsnode *np = VTONFS(vp); 464 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 465 struct vattr vattr; 466 int error; 467 468 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 469 return (EACCES); 470 } 471 472 if (ap->a_mode & FREAD) { 473 if (np->n_rcred != NULL) 474 crfree(np->n_rcred); 475 np->n_rcred = ap->a_cred; 476 crhold(np->n_rcred); 477 } 478 if (ap->a_mode & FWRITE) { 479 if (np->n_wcred != NULL) 480 crfree(np->n_wcred); 481 np->n_wcred = ap->a_cred; 482 crhold(np->n_wcred); 483 } 484 485 #ifndef NFS_V2_ONLY 486 /* 487 * Get a valid lease. If cached data is stale, flush it. 488 */ 489 if (nmp->nm_flag & NFSMNT_NQNFS) { 490 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 491 do { 492 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 493 ap->a_p); 494 } while (error == NQNFS_EXPIRED); 495 if (error) 496 return (error); 497 if (np->n_lrev != np->n_brev || 498 (np->n_flag & NQNFSNONCACHE)) { 499 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 500 ap->a_p, 1)) == EINTR) 501 return (error); 502 np->n_brev = np->n_lrev; 503 } 504 } 505 } else 506 #endif 507 { 508 if (np->n_flag & NMODIFIED) { 509 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 510 ap->a_p, 1)) == EINTR) 511 return (error); 512 NFS_INVALIDATE_ATTRCACHE(np); 513 if (vp->v_type == VDIR) { 514 nfs_invaldircache(vp, 0); 515 np->n_direofoffset = 0; 516 } 517 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 518 if (error) 519 return (error); 520 np->n_mtime = vattr.va_mtime; 521 } else { 522 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 523 if (error) 524 return (error); 525 if (timespeccmp(&np->n_mtime, &vattr.va_mtime, !=)) { 526 if (vp->v_type == VDIR) { 527 nfs_invaldircache(vp, 0); 528 np->n_direofoffset = 0; 529 } 530 if ((error = nfs_vinvalbuf(vp, V_SAVE, 531 ap->a_cred, ap->a_p, 1)) == EINTR) 532 return (error); 533 np->n_mtime = vattr.va_mtime; 534 } 535 } 536 } 537 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 538 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 539 return (0); 540 } 541 542 /* 543 * nfs close vnode op 544 * What an NFS client should do upon close after writing is a debatable issue. 545 * Most NFS clients push delayed writes to the server upon close, basically for 546 * two reasons: 547 * 1 - So that any write errors may be reported back to the client process 548 * doing the close system call. By far the two most likely errors are 549 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 550 * 2 - To put a worst case upper bound on cache inconsistency between 551 * multiple clients for the file. 552 * There is also a consistency problem for Version 2 of the protocol w.r.t. 553 * not being able to tell if other clients are writing a file concurrently, 554 * since there is no way of knowing if the changed modify time in the reply 555 * is only due to the write for this client. 556 * (NFS Version 3 provides weak cache consistency data in the reply that 557 * should be sufficient to detect and handle this case.) 558 * 559 * The current code does the following: 560 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 561 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 562 * or commit them (this satisfies 1 and 2 except for the 563 * case where the server crashes after this close but 564 * before the commit RPC, which is felt to be "good 565 * enough". Changing the last argument to nfs_flush() to 566 * a 1 would force a commit operation, if it is felt a 567 * commit is necessary now. 568 * for NQNFS - do nothing now, since 2 is dealt with via leases and 569 * 1 should be dealt with via an fsync() system call for 570 * cases where write errors are important. 571 */ 572 /* ARGSUSED */ 573 int 574 nfs_close(v) 575 void *v; 576 { 577 struct vop_close_args /* { 578 struct vnodeop_desc *a_desc; 579 struct vnode *a_vp; 580 int a_fflag; 581 struct ucred *a_cred; 582 struct proc *a_p; 583 } */ *ap = v; 584 struct vnode *vp = ap->a_vp; 585 struct nfsnode *np = VTONFS(vp); 586 int error = 0; 587 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 588 589 if (vp->v_type == VREG) { 590 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 591 (np->n_flag & NMODIFIED)) { 592 #ifndef NFS_V2_ONLY 593 if (NFS_ISV3(vp)) { 594 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 595 np->n_flag &= ~NMODIFIED; 596 } else 597 #endif 598 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 599 NFS_INVALIDATE_ATTRCACHE(np); 600 } 601 if (np->n_flag & NWRITEERR) { 602 np->n_flag &= ~NWRITEERR; 603 error = np->n_error; 604 } 605 } 606 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 607 return (error); 608 } 609 610 /* 611 * nfs getattr call from vfs. 612 */ 613 int 614 nfs_getattr(v) 615 void *v; 616 { 617 struct vop_getattr_args /* { 618 struct vnode *a_vp; 619 struct vattr *a_vap; 620 struct ucred *a_cred; 621 struct proc *a_p; 622 } */ *ap = v; 623 struct vnode *vp = ap->a_vp; 624 struct nfsnode *np = VTONFS(vp); 625 caddr_t cp; 626 u_int32_t *tl; 627 int32_t t1, t2; 628 caddr_t bpos, dpos; 629 int error = 0; 630 struct mbuf *mreq, *mrep, *md, *mb; 631 const int v3 = NFS_ISV3(vp); 632 633 /* 634 * Update local times for special files. 635 */ 636 if (np->n_flag & (NACC | NUPD)) 637 np->n_flag |= NCHG; 638 639 /* 640 * if we have delayed truncation, do it now. 641 */ 642 nfs_delayedtruncate(vp); 643 644 /* 645 * First look in the cache. 646 */ 647 if (nfs_getattrcache(vp, ap->a_vap) == 0) 648 return (0); 649 nfsstats.rpccnt[NFSPROC_GETATTR]++; 650 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 651 nfsm_fhtom(np, v3); 652 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 653 if (!error) { 654 nfsm_loadattr(vp, ap->a_vap, 0); 655 if (vp->v_type == VDIR && 656 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 657 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 658 } 659 nfsm_reqdone; 660 return (error); 661 } 662 663 /* 664 * nfs setattr call. 665 */ 666 int 667 nfs_setattr(v) 668 void *v; 669 { 670 struct vop_setattr_args /* { 671 struct vnodeop_desc *a_desc; 672 struct vnode *a_vp; 673 struct vattr *a_vap; 674 struct ucred *a_cred; 675 struct proc *a_p; 676 } */ *ap = v; 677 struct vnode *vp = ap->a_vp; 678 struct nfsnode *np = VTONFS(vp); 679 struct vattr *vap = ap->a_vap; 680 int error = 0; 681 u_quad_t tsize = 0; 682 683 /* 684 * Setting of flags is not supported. 685 */ 686 if (vap->va_flags != VNOVAL) 687 return (EOPNOTSUPP); 688 689 /* 690 * Disallow write attempts if the filesystem is mounted read-only. 691 */ 692 if ((vap->va_uid != (uid_t)VNOVAL || 693 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 694 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 695 (vp->v_mount->mnt_flag & MNT_RDONLY)) 696 return (EROFS); 697 if (vap->va_size != VNOVAL) { 698 switch (vp->v_type) { 699 case VDIR: 700 return (EISDIR); 701 case VCHR: 702 case VBLK: 703 case VSOCK: 704 case VFIFO: 705 if (vap->va_mtime.tv_sec == VNOVAL && 706 vap->va_atime.tv_sec == VNOVAL && 707 vap->va_mode == (mode_t)VNOVAL && 708 vap->va_uid == (uid_t)VNOVAL && 709 vap->va_gid == (gid_t)VNOVAL) 710 return (0); 711 vap->va_size = VNOVAL; 712 break; 713 default: 714 /* 715 * Disallow write attempts if the filesystem is 716 * mounted read-only. 717 */ 718 if (vp->v_mount->mnt_flag & MNT_RDONLY) 719 return (EROFS); 720 uvm_vnp_setsize(vp, vap->va_size); 721 tsize = np->n_size; 722 np->n_size = vap->va_size; 723 if (vap->va_size == 0) 724 error = nfs_vinvalbuf(vp, 0, 725 ap->a_cred, ap->a_p, 1); 726 else 727 error = nfs_vinvalbuf(vp, V_SAVE, 728 ap->a_cred, ap->a_p, 1); 729 if (error) { 730 uvm_vnp_setsize(vp, tsize); 731 return (error); 732 } 733 np->n_vattr->va_size = vap->va_size; 734 } 735 } else if ((vap->va_mtime.tv_sec != VNOVAL || 736 vap->va_atime.tv_sec != VNOVAL) && 737 vp->v_type == VREG && 738 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 739 ap->a_p, 1)) == EINTR) 740 return (error); 741 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 742 if (error && vap->va_size != VNOVAL) { 743 np->n_size = np->n_vattr->va_size = tsize; 744 uvm_vnp_setsize(vp, np->n_size); 745 } 746 VN_KNOTE(vp, NOTE_ATTRIB); 747 return (error); 748 } 749 750 /* 751 * Do an nfs setattr rpc. 752 */ 753 int 754 nfs_setattrrpc(vp, vap, cred, procp) 755 struct vnode *vp; 756 struct vattr *vap; 757 struct ucred *cred; 758 struct proc *procp; 759 { 760 struct nfsv2_sattr *sp; 761 caddr_t cp; 762 int32_t t1, t2; 763 caddr_t bpos, dpos; 764 u_int32_t *tl; 765 int error = 0; 766 struct mbuf *mreq, *mrep, *md, *mb; 767 const int v3 = NFS_ISV3(vp); 768 struct nfsnode *np = VTONFS(vp); 769 #ifndef NFS_V2_ONLY 770 int wccflag = NFSV3_WCCRATTR; 771 caddr_t cp2; 772 #endif 773 774 nfsstats.rpccnt[NFSPROC_SETATTR]++; 775 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 776 nfsm_fhtom(np, v3); 777 #ifndef NFS_V2_ONLY 778 if (v3) { 779 nfsm_v3attrbuild(vap, TRUE); 780 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 781 *tl = nfs_false; 782 } else { 783 #endif 784 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 785 if (vap->va_mode == (mode_t)VNOVAL) 786 sp->sa_mode = nfs_xdrneg1; 787 else 788 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 789 if (vap->va_uid == (uid_t)VNOVAL) 790 sp->sa_uid = nfs_xdrneg1; 791 else 792 sp->sa_uid = txdr_unsigned(vap->va_uid); 793 if (vap->va_gid == (gid_t)VNOVAL) 794 sp->sa_gid = nfs_xdrneg1; 795 else 796 sp->sa_gid = txdr_unsigned(vap->va_gid); 797 sp->sa_size = txdr_unsigned(vap->va_size); 798 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 799 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 800 #ifndef NFS_V2_ONLY 801 } 802 #endif 803 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 804 #ifndef NFS_V2_ONLY 805 if (v3) { 806 nfsm_wcc_data(vp, wccflag, 0); 807 } else 808 #endif 809 nfsm_loadattr(vp, (struct vattr *)0, 0); 810 nfsm_reqdone; 811 return (error); 812 } 813 814 /* 815 * nfs lookup call, one step at a time... 816 * First look in cache 817 * If not found, unlock the directory nfsnode and do the rpc 818 * 819 * This code is full of lock/unlock statements and checks, because 820 * we continue after cache_lookup has finished (we need to check 821 * with the attr cache and do an rpc if it has timed out). This means 822 * that the locking effects of cache_lookup have to be taken into 823 * account. 824 */ 825 int 826 nfs_lookup(v) 827 void *v; 828 { 829 struct vop_lookup_args /* { 830 struct vnodeop_desc *a_desc; 831 struct vnode *a_dvp; 832 struct vnode **a_vpp; 833 struct componentname *a_cnp; 834 } */ *ap = v; 835 struct componentname *cnp = ap->a_cnp; 836 struct vnode *dvp = ap->a_dvp; 837 struct vnode **vpp = ap->a_vpp; 838 int flags; 839 struct vnode *newvp; 840 u_int32_t *tl; 841 caddr_t cp; 842 int32_t t1, t2; 843 caddr_t bpos, dpos, cp2; 844 struct mbuf *mreq, *mrep, *md, *mb; 845 long len; 846 nfsfh_t *fhp; 847 struct nfsnode *np; 848 int lockparent, wantparent, error = 0, attrflag, fhsize; 849 const int v3 = NFS_ISV3(dvp); 850 851 cnp->cn_flags &= ~PDIRUNLOCK; 852 flags = cnp->cn_flags; 853 854 *vpp = NULLVP; 855 newvp = NULLVP; 856 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 857 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 858 return (EROFS); 859 if (dvp->v_type != VDIR) 860 return (ENOTDIR); 861 862 /* 863 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 864 */ 865 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 866 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 867 if (error) 868 return error; 869 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 870 return EISDIR; 871 VREF(dvp); 872 *vpp = dvp; 873 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 874 cnp->cn_flags |= SAVENAME; 875 return 0; 876 } 877 878 lockparent = flags & LOCKPARENT; 879 wantparent = flags & (LOCKPARENT|WANTPARENT); 880 np = VTONFS(dvp); 881 882 /* 883 * Before tediously performing a linear scan of the directory, 884 * check the name cache to see if the directory/name pair 885 * we are looking for is known already. 886 * If the directory/name pair is found in the name cache, 887 * we have to ensure the directory has not changed from 888 * the time the cache entry has been created. If it has, 889 * the cache entry has to be ignored. 890 */ 891 error = cache_lookup_raw(dvp, vpp, cnp); 892 KASSERT(dvp != *vpp); 893 if (error >= 0) { 894 struct vattr vattr; 895 int err2; 896 897 if (error && error != ENOENT) { 898 *vpp = NULLVP; 899 return error; 900 } 901 902 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 903 if (err2 != 0) { 904 if (error == 0) 905 vrele(*vpp); 906 *vpp = NULLVP; 907 return err2; 908 } 909 910 if (error == ENOENT) { 911 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 912 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 913 &VTONFS(dvp)->n_nctime, ==)) { 914 goto noentry; 915 } 916 cache_purge1(dvp, NULL, PURGE_CHILDREN); 917 timespecclear(&np->n_nctime); 918 goto dorpc; 919 } 920 921 newvp = *vpp; 922 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 923 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 924 nfsstats.lookupcache_hits++; 925 if ((flags & ISDOTDOT) != 0 || 926 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 927 VOP_UNLOCK(dvp, 0); 928 cnp->cn_flags |= PDIRUNLOCK; 929 } 930 error = vn_lock(newvp, LK_EXCLUSIVE); 931 if (error) { 932 /* newvp has been revoked. */ 933 vrele(newvp); 934 *vpp = NULL; 935 return error; 936 } 937 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 938 && (cnp->cn_flags & PDIRUNLOCK)) { 939 KASSERT(flags & ISDOTDOT); 940 error = vn_lock(dvp, LK_EXCLUSIVE); 941 if (error) { 942 vput(newvp); 943 *vpp = NULL; 944 return error; 945 } 946 cnp->cn_flags &= ~PDIRUNLOCK; 947 } 948 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 949 cnp->cn_flags |= SAVENAME; 950 KASSERT(newvp->v_type != VNON); 951 return (0); 952 } 953 cache_purge1(newvp, NULL, PURGE_PARENTS); 954 vrele(newvp); 955 *vpp = NULLVP; 956 } 957 dorpc: 958 #if 0 959 /* 960 * because nfsv3 has the same CREATE semantics as ours, 961 * we don't have to perform LOOKUPs beforehand. 962 * 963 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 964 * XXX although we have no way to know if O_EXCL is requested or not. 965 */ 966 967 if (v3 && cnp->cn_nameiop == CREATE && 968 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 969 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 970 KASSERT(lockparent); 971 cnp->cn_flags |= SAVENAME; 972 return (EJUSTRETURN); 973 } 974 #endif /* 0 */ 975 976 error = 0; 977 newvp = NULLVP; 978 nfsstats.lookupcache_misses++; 979 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 980 len = cnp->cn_namelen; 981 nfsm_reqhead(np, NFSPROC_LOOKUP, 982 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 983 nfsm_fhtom(np, v3); 984 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 985 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 986 if (error) { 987 nfsm_postop_attr(dvp, attrflag, 0); 988 m_freem(mrep); 989 goto nfsmout; 990 } 991 nfsm_getfh(fhp, fhsize, v3); 992 993 /* 994 * Handle RENAME case... 995 */ 996 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 997 if (NFS_CMPFH(np, fhp, fhsize)) { 998 m_freem(mrep); 999 return (EISDIR); 1000 } 1001 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1002 if (error) { 1003 m_freem(mrep); 1004 return error; 1005 } 1006 newvp = NFSTOV(np); 1007 #ifndef NFS_V2_ONLY 1008 if (v3) { 1009 nfsm_postop_attr(newvp, attrflag, 0); 1010 nfsm_postop_attr(dvp, attrflag, 0); 1011 } else 1012 #endif 1013 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1014 *vpp = newvp; 1015 m_freem(mrep); 1016 cnp->cn_flags |= SAVENAME; 1017 if (!lockparent) { 1018 VOP_UNLOCK(dvp, 0); 1019 cnp->cn_flags |= PDIRUNLOCK; 1020 } 1021 goto validate; 1022 } 1023 1024 /* 1025 * The postop attr handling is duplicated for each if case, 1026 * because it should be done while dvp is locked (unlocking 1027 * dvp is different for each case). 1028 */ 1029 1030 if (NFS_CMPFH(np, fhp, fhsize)) { 1031 /* 1032 * "." lookup 1033 */ 1034 VREF(dvp); 1035 newvp = dvp; 1036 #ifndef NFS_V2_ONLY 1037 if (v3) { 1038 nfsm_postop_attr(newvp, attrflag, 0); 1039 nfsm_postop_attr(dvp, attrflag, 0); 1040 } else 1041 #endif 1042 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1043 } else if (flags & ISDOTDOT) { 1044 /* 1045 * ".." lookup 1046 */ 1047 VOP_UNLOCK(dvp, 0); 1048 cnp->cn_flags |= PDIRUNLOCK; 1049 1050 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1051 if (error) { 1052 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1053 cnp->cn_flags &= ~PDIRUNLOCK; 1054 m_freem(mrep); 1055 return error; 1056 } 1057 newvp = NFSTOV(np); 1058 1059 #ifndef NFS_V2_ONLY 1060 if (v3) { 1061 nfsm_postop_attr(newvp, attrflag, 0); 1062 nfsm_postop_attr(dvp, attrflag, 0); 1063 } else 1064 #endif 1065 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1066 1067 if (lockparent && (flags & ISLASTCN)) { 1068 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1069 m_freem(mrep); 1070 vput(newvp); 1071 return error; 1072 } 1073 cnp->cn_flags &= ~PDIRUNLOCK; 1074 } 1075 } else { 1076 /* 1077 * Other lookups. 1078 */ 1079 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1080 if (error) { 1081 m_freem(mrep); 1082 return error; 1083 } 1084 newvp = NFSTOV(np); 1085 #ifndef NFS_V2_ONLY 1086 if (v3) { 1087 nfsm_postop_attr(newvp, attrflag, 0); 1088 nfsm_postop_attr(dvp, attrflag, 0); 1089 } else 1090 #endif 1091 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1092 if (!lockparent || !(flags & ISLASTCN)) { 1093 VOP_UNLOCK(dvp, 0); 1094 cnp->cn_flags |= PDIRUNLOCK; 1095 } 1096 } 1097 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1098 cnp->cn_flags |= SAVENAME; 1099 if ((cnp->cn_flags & MAKEENTRY) && 1100 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1101 nfs_cache_enter(dvp, newvp, cnp); 1102 } 1103 *vpp = newvp; 1104 nfsm_reqdone; 1105 if (error) { 1106 /* 1107 * We get here only because of errors returned by 1108 * the RPC. Otherwise we'll have returned above 1109 * (the nfsm_* macros will jump to nfsm_reqdone 1110 * on error). 1111 */ 1112 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1113 cnp->cn_nameiop != CREATE) { 1114 nfs_cache_enter(dvp, NULL, cnp); 1115 } 1116 if (newvp != NULLVP) { 1117 vrele(newvp); 1118 if (newvp != dvp) 1119 VOP_UNLOCK(newvp, 0); 1120 } 1121 noentry: 1122 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1123 (flags & ISLASTCN) && error == ENOENT) { 1124 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1125 error = EROFS; 1126 } else { 1127 error = EJUSTRETURN; 1128 cnp->cn_flags |= SAVENAME; 1129 } 1130 } 1131 *vpp = NULL; 1132 return error; 1133 } 1134 1135 validate: 1136 /* 1137 * make sure we have valid type and size. 1138 */ 1139 1140 newvp = *vpp; 1141 if (newvp->v_type == VNON) { 1142 struct vattr vattr; /* dummy */ 1143 1144 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1145 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1146 if (error) { 1147 vput(newvp); 1148 *vpp = NULL; 1149 } 1150 } 1151 1152 return error; 1153 } 1154 1155 /* 1156 * nfs read call. 1157 * Just call nfs_bioread() to do the work. 1158 */ 1159 int 1160 nfs_read(v) 1161 void *v; 1162 { 1163 struct vop_read_args /* { 1164 struct vnode *a_vp; 1165 struct uio *a_uio; 1166 int a_ioflag; 1167 struct ucred *a_cred; 1168 } */ *ap = v; 1169 struct vnode *vp = ap->a_vp; 1170 1171 if (vp->v_type != VREG) 1172 return (EPERM); 1173 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1174 } 1175 1176 /* 1177 * nfs readlink call 1178 */ 1179 int 1180 nfs_readlink(v) 1181 void *v; 1182 { 1183 struct vop_readlink_args /* { 1184 struct vnode *a_vp; 1185 struct uio *a_uio; 1186 struct ucred *a_cred; 1187 } */ *ap = v; 1188 struct vnode *vp = ap->a_vp; 1189 1190 if (vp->v_type != VLNK) 1191 return (EPERM); 1192 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1193 } 1194 1195 /* 1196 * Do a readlink rpc. 1197 * Called by nfs_doio() from below the buffer cache. 1198 */ 1199 int 1200 nfs_readlinkrpc(vp, uiop, cred) 1201 struct vnode *vp; 1202 struct uio *uiop; 1203 struct ucred *cred; 1204 { 1205 u_int32_t *tl; 1206 caddr_t cp; 1207 int32_t t1, t2; 1208 caddr_t bpos, dpos, cp2; 1209 int error = 0; 1210 uint32_t len; 1211 struct mbuf *mreq, *mrep, *md, *mb; 1212 const int v3 = NFS_ISV3(vp); 1213 struct nfsnode *np = VTONFS(vp); 1214 #ifndef NFS_V2_ONLY 1215 int attrflag; 1216 #endif 1217 1218 nfsstats.rpccnt[NFSPROC_READLINK]++; 1219 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1220 nfsm_fhtom(np, v3); 1221 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1222 #ifndef NFS_V2_ONLY 1223 if (v3) 1224 nfsm_postop_attr(vp, attrflag, 0); 1225 #endif 1226 if (!error) { 1227 #ifndef NFS_V2_ONLY 1228 if (v3) { 1229 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1230 len = fxdr_unsigned(uint32_t, *tl); 1231 if (len > MAXPATHLEN) { 1232 /* 1233 * this pathname is too long for us. 1234 */ 1235 m_freem(mrep); 1236 /* Solaris returns EINVAL. should we follow? */ 1237 error = ENAMETOOLONG; 1238 goto nfsmout; 1239 } 1240 } else 1241 #endif 1242 { 1243 nfsm_strsiz(len, NFS_MAXPATHLEN); 1244 } 1245 nfsm_mtouio(uiop, len); 1246 } 1247 nfsm_reqdone; 1248 return (error); 1249 } 1250 1251 /* 1252 * nfs read rpc call 1253 * Ditto above 1254 */ 1255 int 1256 nfs_readrpc(vp, uiop) 1257 struct vnode *vp; 1258 struct uio *uiop; 1259 { 1260 u_int32_t *tl; 1261 caddr_t cp; 1262 int32_t t1, t2; 1263 caddr_t bpos, dpos, cp2; 1264 struct mbuf *mreq, *mrep, *md, *mb; 1265 struct nfsmount *nmp; 1266 int error = 0, len, retlen, tsiz, eof; 1267 const int v3 = NFS_ISV3(vp); 1268 struct nfsnode *np = VTONFS(vp); 1269 #ifndef NFS_V2_ONLY 1270 int attrflag; 1271 #endif 1272 1273 #ifndef nolint 1274 eof = 0; 1275 #endif 1276 nmp = VFSTONFS(vp->v_mount); 1277 tsiz = uiop->uio_resid; 1278 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1279 return (EFBIG); 1280 while (tsiz > 0) { 1281 nfsstats.rpccnt[NFSPROC_READ]++; 1282 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1283 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1284 nfsm_fhtom(np, v3); 1285 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1286 #ifndef NFS_V2_ONLY 1287 if (v3) { 1288 txdr_hyper(uiop->uio_offset, tl); 1289 *(tl + 2) = txdr_unsigned(len); 1290 } else 1291 #endif 1292 { 1293 *tl++ = txdr_unsigned(uiop->uio_offset); 1294 *tl++ = txdr_unsigned(len); 1295 *tl = 0; 1296 } 1297 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1298 #ifndef NFS_V2_ONLY 1299 if (v3) { 1300 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1301 if (error) { 1302 m_freem(mrep); 1303 goto nfsmout; 1304 } 1305 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1306 eof = fxdr_unsigned(int, *(tl + 1)); 1307 } else 1308 #endif 1309 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1310 nfsm_strsiz(retlen, nmp->nm_rsize); 1311 nfsm_mtouio(uiop, retlen); 1312 m_freem(mrep); 1313 tsiz -= retlen; 1314 #ifndef NFS_V2_ONLY 1315 if (v3) { 1316 if (eof || retlen == 0) 1317 tsiz = 0; 1318 } else 1319 #endif 1320 if (retlen < len) 1321 tsiz = 0; 1322 } 1323 nfsmout: 1324 return (error); 1325 } 1326 1327 struct nfs_writerpc_context { 1328 struct simplelock nwc_slock; 1329 volatile int nwc_mbufcount; 1330 }; 1331 1332 /* 1333 * free mbuf used to refer protected pages while write rpc call. 1334 * called at splvm. 1335 */ 1336 static void 1337 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1338 { 1339 struct nfs_writerpc_context *ctx = arg; 1340 1341 KASSERT(m != NULL); 1342 KASSERT(ctx != NULL); 1343 pool_cache_put(&mbpool_cache, m); 1344 simple_lock(&ctx->nwc_slock); 1345 if (--ctx->nwc_mbufcount == 0) { 1346 wakeup(ctx); 1347 } 1348 simple_unlock(&ctx->nwc_slock); 1349 } 1350 1351 /* 1352 * nfs write call 1353 */ 1354 int 1355 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1356 struct vnode *vp; 1357 struct uio *uiop; 1358 int *iomode; 1359 boolean_t pageprotected; 1360 boolean_t *stalewriteverfp; 1361 { 1362 u_int32_t *tl; 1363 caddr_t cp; 1364 int32_t t1, t2; 1365 caddr_t bpos, dpos; 1366 struct mbuf *mreq, *mrep, *md, *mb; 1367 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1368 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1369 const int v3 = NFS_ISV3(vp); 1370 int committed = NFSV3WRITE_FILESYNC; 1371 struct nfsnode *np = VTONFS(vp); 1372 struct nfs_writerpc_context ctx; 1373 int s; 1374 struct lwp *l = NULL; 1375 size_t origresid; 1376 #ifndef NFS_V2_ONLY 1377 caddr_t cp2; 1378 int rlen, commit; 1379 #endif 1380 1381 simple_lock_init(&ctx.nwc_slock); 1382 ctx.nwc_mbufcount = 1; 1383 1384 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1385 panic("writerpc readonly vp %p", vp); 1386 } 1387 1388 #ifdef DIAGNOSTIC 1389 if (uiop->uio_iovcnt != 1) 1390 panic("nfs: writerpc iovcnt > 1"); 1391 #endif 1392 tsiz = uiop->uio_resid; 1393 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1394 return (EFBIG); 1395 if (pageprotected) { 1396 l = curlwp; 1397 PHOLD(l); 1398 } 1399 retry: 1400 origresid = uiop->uio_resid; 1401 KASSERT(origresid == uiop->uio_iov->iov_len); 1402 while (tsiz > 0) { 1403 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1404 uint32_t backup; 1405 boolean_t stalewriteverf = FALSE; 1406 1407 nfsstats.rpccnt[NFSPROC_WRITE]++; 1408 len = min(tsiz, nmp->nm_wsize); 1409 datalen = pageprotected ? 0 : nfsm_rndup(len); 1410 nfsm_reqhead(np, NFSPROC_WRITE, 1411 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1412 nfsm_fhtom(np, v3); 1413 #ifndef NFS_V2_ONLY 1414 if (v3) { 1415 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1416 txdr_hyper(uiop->uio_offset, tl); 1417 tl += 2; 1418 *tl++ = txdr_unsigned(len); 1419 *tl++ = txdr_unsigned(*iomode); 1420 *tl = txdr_unsigned(len); 1421 } else 1422 #endif 1423 { 1424 u_int32_t x; 1425 1426 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1427 /* Set both "begin" and "current" to non-garbage. */ 1428 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1429 *tl++ = x; /* "begin offset" */ 1430 *tl++ = x; /* "current offset" */ 1431 x = txdr_unsigned(len); 1432 *tl++ = x; /* total to this offset */ 1433 *tl = x; /* size of this write */ 1434 1435 } 1436 if (pageprotected) { 1437 /* 1438 * since we know pages can't be modified during i/o, 1439 * no need to copy them for us. 1440 */ 1441 struct mbuf *m; 1442 struct iovec *iovp = uiop->uio_iov; 1443 1444 m = m_get(M_WAIT, MT_DATA); 1445 MCLAIM(m, &nfs_mowner); 1446 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1447 nfs_writerpc_extfree, &ctx); 1448 m->m_flags |= M_EXT_ROMAP; 1449 m->m_len = len; 1450 mb->m_next = m; 1451 /* 1452 * no need to maintain mb and bpos here 1453 * because no one care them later. 1454 */ 1455 #if 0 1456 mb = m; 1457 bpos = mtod(caddr_t, mb) + mb->m_len; 1458 #endif 1459 iovp->iov_base = (char *)iovp->iov_base + len; 1460 iovp->iov_len -= len; 1461 uiop->uio_offset += len; 1462 uiop->uio_resid -= len; 1463 s = splvm(); 1464 simple_lock(&ctx.nwc_slock); 1465 ctx.nwc_mbufcount++; 1466 simple_unlock(&ctx.nwc_slock); 1467 splx(s); 1468 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1469 } else { 1470 nfsm_uiotom(uiop, len); 1471 } 1472 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1473 #ifndef NFS_V2_ONLY 1474 if (v3) { 1475 wccflag = NFSV3_WCCCHK; 1476 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1477 if (!error) { 1478 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1479 + NFSX_V3WRITEVERF); 1480 rlen = fxdr_unsigned(int, *tl++); 1481 if (rlen == 0) { 1482 error = NFSERR_IO; 1483 m_freem(mrep); 1484 break; 1485 } else if (rlen < len) { 1486 backup = len - rlen; 1487 uiop->uio_iov->iov_base = 1488 (caddr_t)uiop->uio_iov->iov_base - 1489 backup; 1490 uiop->uio_iov->iov_len += backup; 1491 uiop->uio_offset -= backup; 1492 uiop->uio_resid += backup; 1493 len = rlen; 1494 } 1495 commit = fxdr_unsigned(int, *tl++); 1496 1497 /* 1498 * Return the lowest committment level 1499 * obtained by any of the RPCs. 1500 */ 1501 if (committed == NFSV3WRITE_FILESYNC) 1502 committed = commit; 1503 else if (committed == NFSV3WRITE_DATASYNC && 1504 commit == NFSV3WRITE_UNSTABLE) 1505 committed = commit; 1506 simple_lock(&nmp->nm_slock); 1507 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1508 memcpy(nmp->nm_writeverf, tl, 1509 NFSX_V3WRITEVERF); 1510 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1511 } else if ((nmp->nm_iflag & 1512 NFSMNT_STALEWRITEVERF) || 1513 memcmp(tl, nmp->nm_writeverf, 1514 NFSX_V3WRITEVERF)) { 1515 memcpy(nmp->nm_writeverf, tl, 1516 NFSX_V3WRITEVERF); 1517 /* 1518 * note NFSMNT_STALEWRITEVERF 1519 * if we're the first thread to 1520 * notice it. 1521 */ 1522 if ((nmp->nm_iflag & 1523 NFSMNT_STALEWRITEVERF) == 0) { 1524 stalewriteverf = TRUE; 1525 nmp->nm_iflag |= 1526 NFSMNT_STALEWRITEVERF; 1527 } 1528 } 1529 simple_unlock(&nmp->nm_slock); 1530 } 1531 } else 1532 #endif 1533 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1534 if (wccflag) 1535 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1536 m_freem(mrep); 1537 if (error) 1538 break; 1539 tsiz -= len; 1540 if (stalewriteverf) { 1541 *stalewriteverfp = TRUE; 1542 stalewriteverf = FALSE; 1543 if (committed == NFSV3WRITE_UNSTABLE && 1544 len != origresid) { 1545 /* 1546 * if our write requests weren't atomic but 1547 * unstable, datas in previous iterations 1548 * might have already been lost now. 1549 * then, we should resend them to nfsd. 1550 */ 1551 backup = origresid - tsiz; 1552 uiop->uio_iov->iov_base = 1553 (caddr_t)uiop->uio_iov->iov_base - backup; 1554 uiop->uio_iov->iov_len += backup; 1555 uiop->uio_offset -= backup; 1556 uiop->uio_resid += backup; 1557 tsiz = origresid; 1558 goto retry; 1559 } 1560 } 1561 } 1562 if (pageprotected) { 1563 /* 1564 * wait until mbufs go away. 1565 * retransmitted mbufs can survive longer than rpc requests 1566 * themselves. 1567 */ 1568 s = splvm(); 1569 simple_lock(&ctx.nwc_slock); 1570 ctx.nwc_mbufcount--; 1571 while (ctx.nwc_mbufcount > 0) { 1572 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1573 } 1574 simple_unlock(&ctx.nwc_slock); 1575 splx(s); 1576 PRELE(l); 1577 } 1578 nfsmout: 1579 *iomode = committed; 1580 if (error) 1581 uiop->uio_resid = tsiz; 1582 return (error); 1583 } 1584 1585 /* 1586 * nfs mknod rpc 1587 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1588 * mode set to specify the file type and the size field for rdev. 1589 */ 1590 int 1591 nfs_mknodrpc(dvp, vpp, cnp, vap) 1592 struct vnode *dvp; 1593 struct vnode **vpp; 1594 struct componentname *cnp; 1595 struct vattr *vap; 1596 { 1597 struct nfsv2_sattr *sp; 1598 u_int32_t *tl; 1599 caddr_t cp; 1600 int32_t t1, t2; 1601 struct vnode *newvp = (struct vnode *)0; 1602 struct nfsnode *dnp, *np; 1603 char *cp2; 1604 caddr_t bpos, dpos; 1605 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1606 struct mbuf *mreq, *mrep, *md, *mb; 1607 u_int32_t rdev; 1608 const int v3 = NFS_ISV3(dvp); 1609 1610 if (vap->va_type == VCHR || vap->va_type == VBLK) 1611 rdev = txdr_unsigned(vap->va_rdev); 1612 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1613 rdev = nfs_xdrneg1; 1614 else { 1615 VOP_ABORTOP(dvp, cnp); 1616 vput(dvp); 1617 return (EOPNOTSUPP); 1618 } 1619 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1620 dnp = VTONFS(dvp); 1621 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1622 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1623 nfsm_fhtom(dnp, v3); 1624 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1625 #ifndef NFS_V2_ONLY 1626 if (v3) { 1627 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1628 *tl++ = vtonfsv3_type(vap->va_type); 1629 nfsm_v3attrbuild(vap, FALSE); 1630 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1631 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1632 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1633 *tl = txdr_unsigned(minor(vap->va_rdev)); 1634 } 1635 } else 1636 #endif 1637 { 1638 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1639 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1640 sp->sa_uid = nfs_xdrneg1; 1641 sp->sa_gid = nfs_xdrneg1; 1642 sp->sa_size = rdev; 1643 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1644 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1645 } 1646 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1647 if (!error) { 1648 nfsm_mtofh(dvp, newvp, v3, gotvp); 1649 if (!gotvp) { 1650 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1651 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1652 if (!error) 1653 newvp = NFSTOV(np); 1654 } 1655 } 1656 #ifndef NFS_V2_ONLY 1657 if (v3) 1658 nfsm_wcc_data(dvp, wccflag, 0); 1659 #endif 1660 nfsm_reqdone; 1661 if (error) { 1662 if (newvp) 1663 vput(newvp); 1664 } else { 1665 if (cnp->cn_flags & MAKEENTRY) 1666 nfs_cache_enter(dvp, newvp, cnp); 1667 *vpp = newvp; 1668 } 1669 PNBUF_PUT(cnp->cn_pnbuf); 1670 VTONFS(dvp)->n_flag |= NMODIFIED; 1671 if (!wccflag) 1672 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1673 vput(dvp); 1674 return (error); 1675 } 1676 1677 /* 1678 * nfs mknod vop 1679 * just call nfs_mknodrpc() to do the work. 1680 */ 1681 /* ARGSUSED */ 1682 int 1683 nfs_mknod(v) 1684 void *v; 1685 { 1686 struct vop_mknod_args /* { 1687 struct vnode *a_dvp; 1688 struct vnode **a_vpp; 1689 struct componentname *a_cnp; 1690 struct vattr *a_vap; 1691 } */ *ap = v; 1692 struct vnode *dvp = ap->a_dvp; 1693 struct componentname *cnp = ap->a_cnp; 1694 int error; 1695 1696 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1697 VN_KNOTE(dvp, NOTE_WRITE); 1698 if (error == 0 || error == EEXIST) 1699 cache_purge1(dvp, cnp, 0); 1700 return (error); 1701 } 1702 1703 #ifndef NFS_V2_ONLY 1704 static u_long create_verf; 1705 #endif 1706 /* 1707 * nfs file create call 1708 */ 1709 int 1710 nfs_create(v) 1711 void *v; 1712 { 1713 struct vop_create_args /* { 1714 struct vnode *a_dvp; 1715 struct vnode **a_vpp; 1716 struct componentname *a_cnp; 1717 struct vattr *a_vap; 1718 } */ *ap = v; 1719 struct vnode *dvp = ap->a_dvp; 1720 struct vattr *vap = ap->a_vap; 1721 struct componentname *cnp = ap->a_cnp; 1722 struct nfsv2_sattr *sp; 1723 u_int32_t *tl; 1724 caddr_t cp; 1725 int32_t t1, t2; 1726 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1727 struct vnode *newvp = (struct vnode *)0; 1728 caddr_t bpos, dpos, cp2; 1729 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1730 struct mbuf *mreq, *mrep, *md, *mb; 1731 const int v3 = NFS_ISV3(dvp); 1732 1733 /* 1734 * Oops, not for me.. 1735 */ 1736 if (vap->va_type == VSOCK) 1737 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1738 1739 #ifdef VA_EXCLUSIVE 1740 if (vap->va_vaflags & VA_EXCLUSIVE) 1741 fmode |= O_EXCL; 1742 #endif 1743 again: 1744 error = 0; 1745 nfsstats.rpccnt[NFSPROC_CREATE]++; 1746 dnp = VTONFS(dvp); 1747 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1748 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1749 nfsm_fhtom(dnp, v3); 1750 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1751 #ifndef NFS_V2_ONLY 1752 if (v3) { 1753 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1754 if (fmode & O_EXCL) { 1755 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1756 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1757 #ifdef INET 1758 if (TAILQ_FIRST(&in_ifaddr)) 1759 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1760 else 1761 *tl++ = create_verf; 1762 #else 1763 *tl++ = create_verf; 1764 #endif 1765 *tl = ++create_verf; 1766 } else { 1767 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1768 nfsm_v3attrbuild(vap, FALSE); 1769 } 1770 } else 1771 #endif 1772 { 1773 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1774 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1775 sp->sa_uid = nfs_xdrneg1; 1776 sp->sa_gid = nfs_xdrneg1; 1777 sp->sa_size = 0; 1778 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1779 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1780 } 1781 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1782 if (!error) { 1783 nfsm_mtofh(dvp, newvp, v3, gotvp); 1784 if (!gotvp) { 1785 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1786 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1787 if (!error) 1788 newvp = NFSTOV(np); 1789 } 1790 } 1791 #ifndef NFS_V2_ONLY 1792 if (v3) 1793 nfsm_wcc_data(dvp, wccflag, 0); 1794 #endif 1795 nfsm_reqdone; 1796 if (error) { 1797 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1798 fmode &= ~O_EXCL; 1799 goto again; 1800 } 1801 } else if (v3 && (fmode & O_EXCL)) 1802 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1803 if (error == 0) { 1804 if (cnp->cn_flags & MAKEENTRY) 1805 nfs_cache_enter(dvp, newvp, cnp); 1806 else 1807 cache_purge1(dvp, cnp, 0); 1808 *ap->a_vpp = newvp; 1809 } else { 1810 if (newvp) 1811 vput(newvp); 1812 if (error == EEXIST) 1813 cache_purge1(dvp, cnp, 0); 1814 } 1815 PNBUF_PUT(cnp->cn_pnbuf); 1816 VTONFS(dvp)->n_flag |= NMODIFIED; 1817 if (!wccflag) 1818 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1819 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1820 vput(dvp); 1821 return (error); 1822 } 1823 1824 /* 1825 * nfs file remove call 1826 * To try and make nfs semantics closer to ufs semantics, a file that has 1827 * other processes using the vnode is renamed instead of removed and then 1828 * removed later on the last close. 1829 * - If v_usecount > 1 1830 * If a rename is not already in the works 1831 * call nfs_sillyrename() to set it up 1832 * else 1833 * do the remove rpc 1834 */ 1835 int 1836 nfs_remove(v) 1837 void *v; 1838 { 1839 struct vop_remove_args /* { 1840 struct vnodeop_desc *a_desc; 1841 struct vnode * a_dvp; 1842 struct vnode * a_vp; 1843 struct componentname * a_cnp; 1844 } */ *ap = v; 1845 struct vnode *vp = ap->a_vp; 1846 struct vnode *dvp = ap->a_dvp; 1847 struct componentname *cnp = ap->a_cnp; 1848 struct nfsnode *np = VTONFS(vp); 1849 int error = 0; 1850 struct vattr vattr; 1851 1852 #ifndef DIAGNOSTIC 1853 if ((cnp->cn_flags & HASBUF) == 0) 1854 panic("nfs_remove: no name"); 1855 if (vp->v_usecount < 1) 1856 panic("nfs_remove: bad v_usecount"); 1857 #endif 1858 if (vp->v_type == VDIR) 1859 error = EPERM; 1860 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1861 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1862 vattr.va_nlink > 1)) { 1863 /* 1864 * Purge the name cache so that the chance of a lookup for 1865 * the name succeeding while the remove is in progress is 1866 * minimized. Without node locking it can still happen, such 1867 * that an I/O op returns ESTALE, but since you get this if 1868 * another host removes the file.. 1869 */ 1870 cache_purge(vp); 1871 /* 1872 * throw away biocache buffers, mainly to avoid 1873 * unnecessary delayed writes later. 1874 */ 1875 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1876 /* Do the rpc */ 1877 if (error != EINTR) 1878 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1879 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1880 } else if (!np->n_sillyrename) 1881 error = nfs_sillyrename(dvp, vp, cnp); 1882 PNBUF_PUT(cnp->cn_pnbuf); 1883 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1884 vattr.va_nlink == 1) { 1885 np->n_flag |= NREMOVED; 1886 } 1887 NFS_INVALIDATE_ATTRCACHE(np); 1888 VN_KNOTE(vp, NOTE_DELETE); 1889 VN_KNOTE(dvp, NOTE_WRITE); 1890 if (dvp == vp) 1891 vrele(vp); 1892 else 1893 vput(vp); 1894 vput(dvp); 1895 return (error); 1896 } 1897 1898 /* 1899 * nfs file remove rpc called from nfs_inactive 1900 */ 1901 int 1902 nfs_removeit(sp) 1903 struct sillyrename *sp; 1904 { 1905 1906 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1907 (struct proc *)0)); 1908 } 1909 1910 /* 1911 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1912 */ 1913 int 1914 nfs_removerpc(dvp, name, namelen, cred, proc) 1915 struct vnode *dvp; 1916 const char *name; 1917 int namelen; 1918 struct ucred *cred; 1919 struct proc *proc; 1920 { 1921 u_int32_t *tl; 1922 caddr_t cp; 1923 #ifndef NFS_V2_ONLY 1924 int32_t t1; 1925 caddr_t cp2; 1926 #endif 1927 int32_t t2; 1928 caddr_t bpos, dpos; 1929 int error = 0, wccflag = NFSV3_WCCRATTR; 1930 struct mbuf *mreq, *mrep, *md, *mb; 1931 const int v3 = NFS_ISV3(dvp); 1932 int rexmit; 1933 struct nfsnode *dnp = VTONFS(dvp); 1934 1935 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1936 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1937 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1938 nfsm_fhtom(dnp, v3); 1939 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1940 nfsm_request1(dnp, NFSPROC_REMOVE, proc, cred, &rexmit); 1941 #ifndef NFS_V2_ONLY 1942 if (v3) 1943 nfsm_wcc_data(dvp, wccflag, 0); 1944 #endif 1945 nfsm_reqdone; 1946 VTONFS(dvp)->n_flag |= NMODIFIED; 1947 if (!wccflag) 1948 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1949 /* 1950 * Kludge City: If the first reply to the remove rpc is lost.. 1951 * the reply to the retransmitted request will be ENOENT 1952 * since the file was in fact removed 1953 * Therefore, we cheat and return success. 1954 */ 1955 if (rexmit && error == ENOENT) 1956 error = 0; 1957 return (error); 1958 } 1959 1960 /* 1961 * nfs file rename call 1962 */ 1963 int 1964 nfs_rename(v) 1965 void *v; 1966 { 1967 struct vop_rename_args /* { 1968 struct vnode *a_fdvp; 1969 struct vnode *a_fvp; 1970 struct componentname *a_fcnp; 1971 struct vnode *a_tdvp; 1972 struct vnode *a_tvp; 1973 struct componentname *a_tcnp; 1974 } */ *ap = v; 1975 struct vnode *fvp = ap->a_fvp; 1976 struct vnode *tvp = ap->a_tvp; 1977 struct vnode *fdvp = ap->a_fdvp; 1978 struct vnode *tdvp = ap->a_tdvp; 1979 struct componentname *tcnp = ap->a_tcnp; 1980 struct componentname *fcnp = ap->a_fcnp; 1981 int error; 1982 1983 #ifndef DIAGNOSTIC 1984 if ((tcnp->cn_flags & HASBUF) == 0 || 1985 (fcnp->cn_flags & HASBUF) == 0) 1986 panic("nfs_rename: no name"); 1987 #endif 1988 /* Check for cross-device rename */ 1989 if ((fvp->v_mount != tdvp->v_mount) || 1990 (tvp && (fvp->v_mount != tvp->v_mount))) { 1991 error = EXDEV; 1992 goto out; 1993 } 1994 1995 /* 1996 * If the tvp exists and is in use, sillyrename it before doing the 1997 * rename of the new file over it. 1998 */ 1999 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 2000 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 2001 VN_KNOTE(tvp, NOTE_DELETE); 2002 vput(tvp); 2003 tvp = NULL; 2004 } 2005 2006 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2007 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2008 tcnp->cn_proc); 2009 2010 VN_KNOTE(fdvp, NOTE_WRITE); 2011 VN_KNOTE(tdvp, NOTE_WRITE); 2012 if (error == 0 || error == EEXIST) { 2013 if (fvp->v_type == VDIR) 2014 cache_purge(fvp); 2015 else 2016 cache_purge1(fdvp, fcnp, 0); 2017 if (tvp != NULL && tvp->v_type == VDIR) 2018 cache_purge(tvp); 2019 else 2020 cache_purge1(tdvp, tcnp, 0); 2021 } 2022 out: 2023 if (tdvp == tvp) 2024 vrele(tdvp); 2025 else 2026 vput(tdvp); 2027 if (tvp) 2028 vput(tvp); 2029 vrele(fdvp); 2030 vrele(fvp); 2031 return (error); 2032 } 2033 2034 /* 2035 * nfs file rename rpc called from nfs_remove() above 2036 */ 2037 int 2038 nfs_renameit(sdvp, scnp, sp) 2039 struct vnode *sdvp; 2040 struct componentname *scnp; 2041 struct sillyrename *sp; 2042 { 2043 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2044 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 2045 } 2046 2047 /* 2048 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2049 */ 2050 int 2051 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 2052 struct vnode *fdvp; 2053 const char *fnameptr; 2054 int fnamelen; 2055 struct vnode *tdvp; 2056 const char *tnameptr; 2057 int tnamelen; 2058 struct ucred *cred; 2059 struct proc *proc; 2060 { 2061 u_int32_t *tl; 2062 caddr_t cp; 2063 #ifndef NFS_V2_ONLY 2064 int32_t t1; 2065 caddr_t cp2; 2066 #endif 2067 int32_t t2; 2068 caddr_t bpos, dpos; 2069 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2070 struct mbuf *mreq, *mrep, *md, *mb; 2071 const int v3 = NFS_ISV3(fdvp); 2072 int rexmit; 2073 struct nfsnode *fdnp = VTONFS(fdvp); 2074 2075 nfsstats.rpccnt[NFSPROC_RENAME]++; 2076 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2077 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2078 nfsm_rndup(tnamelen)); 2079 nfsm_fhtom(fdnp, v3); 2080 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2081 nfsm_fhtom(VTONFS(tdvp), v3); 2082 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2083 nfsm_request1(fdnp, NFSPROC_RENAME, proc, cred, &rexmit); 2084 #ifndef NFS_V2_ONLY 2085 if (v3) { 2086 nfsm_wcc_data(fdvp, fwccflag, 0); 2087 nfsm_wcc_data(tdvp, twccflag, 0); 2088 } 2089 #endif 2090 nfsm_reqdone; 2091 VTONFS(fdvp)->n_flag |= NMODIFIED; 2092 VTONFS(tdvp)->n_flag |= NMODIFIED; 2093 if (!fwccflag) 2094 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2095 if (!twccflag) 2096 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2097 /* 2098 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2099 */ 2100 if (rexmit && error == ENOENT) 2101 error = 0; 2102 return (error); 2103 } 2104 2105 /* 2106 * nfs hard link create call 2107 */ 2108 int 2109 nfs_link(v) 2110 void *v; 2111 { 2112 struct vop_link_args /* { 2113 struct vnode *a_dvp; 2114 struct vnode *a_vp; 2115 struct componentname *a_cnp; 2116 } */ *ap = v; 2117 struct vnode *vp = ap->a_vp; 2118 struct vnode *dvp = ap->a_dvp; 2119 struct componentname *cnp = ap->a_cnp; 2120 u_int32_t *tl; 2121 caddr_t cp; 2122 #ifndef NFS_V2_ONLY 2123 int32_t t1; 2124 caddr_t cp2; 2125 #endif 2126 int32_t t2; 2127 caddr_t bpos, dpos; 2128 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2129 struct mbuf *mreq, *mrep, *md, *mb; 2130 /* XXX Should be const and initialised? */ 2131 int v3; 2132 int rexmit; 2133 struct nfsnode *np; 2134 2135 if (dvp->v_mount != vp->v_mount) { 2136 VOP_ABORTOP(dvp, cnp); 2137 vput(dvp); 2138 return (EXDEV); 2139 } 2140 if (dvp != vp) { 2141 error = vn_lock(vp, LK_EXCLUSIVE); 2142 if (error != 0) { 2143 VOP_ABORTOP(dvp, cnp); 2144 vput(dvp); 2145 return error; 2146 } 2147 } 2148 2149 /* 2150 * Push all writes to the server, so that the attribute cache 2151 * doesn't get "out of sync" with the server. 2152 * XXX There should be a better way! 2153 */ 2154 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2155 2156 v3 = NFS_ISV3(vp); 2157 nfsstats.rpccnt[NFSPROC_LINK]++; 2158 np = VTONFS(vp); 2159 nfsm_reqhead(np, NFSPROC_LINK, 2160 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2161 nfsm_fhtom(np, v3); 2162 nfsm_fhtom(VTONFS(dvp), v3); 2163 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2164 nfsm_request1(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred, &rexmit); 2165 #ifndef NFS_V2_ONLY 2166 if (v3) { 2167 nfsm_postop_attr(vp, attrflag, 0); 2168 nfsm_wcc_data(dvp, wccflag, 0); 2169 } 2170 #endif 2171 nfsm_reqdone; 2172 if (error == 0 || error == EEXIST) 2173 cache_purge1(dvp, cnp, 0); 2174 PNBUF_PUT(cnp->cn_pnbuf); 2175 VTONFS(dvp)->n_flag |= NMODIFIED; 2176 if (!attrflag) 2177 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2178 if (!wccflag) 2179 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2180 if (dvp != vp) 2181 VOP_UNLOCK(vp, 0); 2182 VN_KNOTE(vp, NOTE_LINK); 2183 VN_KNOTE(dvp, NOTE_WRITE); 2184 vput(dvp); 2185 /* 2186 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2187 */ 2188 if (rexmit && error == EEXIST) 2189 error = 0; 2190 return (error); 2191 } 2192 2193 /* 2194 * nfs symbolic link create call 2195 */ 2196 int 2197 nfs_symlink(v) 2198 void *v; 2199 { 2200 struct vop_symlink_args /* { 2201 struct vnode *a_dvp; 2202 struct vnode **a_vpp; 2203 struct componentname *a_cnp; 2204 struct vattr *a_vap; 2205 char *a_target; 2206 } */ *ap = v; 2207 struct vnode *dvp = ap->a_dvp; 2208 struct vattr *vap = ap->a_vap; 2209 struct componentname *cnp = ap->a_cnp; 2210 struct nfsv2_sattr *sp; 2211 u_int32_t *tl; 2212 caddr_t cp; 2213 int32_t t1, t2; 2214 caddr_t bpos, dpos, cp2; 2215 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2216 struct mbuf *mreq, *mrep, *md, *mb; 2217 struct vnode *newvp = (struct vnode *)0; 2218 const int v3 = NFS_ISV3(dvp); 2219 int rexmit; 2220 struct nfsnode *dnp = VTONFS(dvp); 2221 2222 *ap->a_vpp = NULL; 2223 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2224 slen = strlen(ap->a_target); 2225 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2226 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2227 nfsm_fhtom(dnp, v3); 2228 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2229 #ifndef NFS_V2_ONlY 2230 if (v3) 2231 nfsm_v3attrbuild(vap, FALSE); 2232 #endif 2233 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2234 #ifndef NFS_V2_ONlY 2235 if (!v3) { 2236 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2237 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2238 sp->sa_uid = nfs_xdrneg1; 2239 sp->sa_gid = nfs_xdrneg1; 2240 sp->sa_size = nfs_xdrneg1; 2241 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2242 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2243 } 2244 #endif 2245 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred, 2246 &rexmit); 2247 #ifndef NFS_V2_ONlY 2248 if (v3) { 2249 if (!error) 2250 nfsm_mtofh(dvp, newvp, v3, gotvp); 2251 nfsm_wcc_data(dvp, wccflag, 0); 2252 } 2253 #endif 2254 nfsm_reqdone; 2255 /* 2256 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2257 */ 2258 if (rexmit && error == EEXIST) 2259 error = 0; 2260 if (error == 0 || error == EEXIST) 2261 cache_purge1(dvp, cnp, 0); 2262 if (error == 0 && newvp == NULL) { 2263 struct nfsnode *np = NULL; 2264 2265 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2266 cnp->cn_cred, cnp->cn_proc, &np); 2267 if (error == 0) 2268 newvp = NFSTOV(np); 2269 } 2270 if (error) { 2271 if (newvp != NULL) 2272 vput(newvp); 2273 } else { 2274 *ap->a_vpp = newvp; 2275 } 2276 PNBUF_PUT(cnp->cn_pnbuf); 2277 VTONFS(dvp)->n_flag |= NMODIFIED; 2278 if (!wccflag) 2279 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2280 VN_KNOTE(dvp, NOTE_WRITE); 2281 vput(dvp); 2282 return (error); 2283 } 2284 2285 /* 2286 * nfs make dir call 2287 */ 2288 int 2289 nfs_mkdir(v) 2290 void *v; 2291 { 2292 struct vop_mkdir_args /* { 2293 struct vnode *a_dvp; 2294 struct vnode **a_vpp; 2295 struct componentname *a_cnp; 2296 struct vattr *a_vap; 2297 } */ *ap = v; 2298 struct vnode *dvp = ap->a_dvp; 2299 struct vattr *vap = ap->a_vap; 2300 struct componentname *cnp = ap->a_cnp; 2301 struct nfsv2_sattr *sp; 2302 u_int32_t *tl; 2303 caddr_t cp; 2304 int32_t t1, t2; 2305 int len; 2306 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2307 struct vnode *newvp = (struct vnode *)0; 2308 caddr_t bpos, dpos, cp2; 2309 int error = 0, wccflag = NFSV3_WCCRATTR; 2310 int gotvp = 0; 2311 int rexmit; 2312 struct mbuf *mreq, *mrep, *md, *mb; 2313 const int v3 = NFS_ISV3(dvp); 2314 2315 len = cnp->cn_namelen; 2316 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2317 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2318 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2319 nfsm_fhtom(dnp, v3); 2320 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2321 #ifndef NFS_V2_ONLY 2322 if (v3) { 2323 nfsm_v3attrbuild(vap, FALSE); 2324 } else 2325 #endif 2326 { 2327 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2328 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2329 sp->sa_uid = nfs_xdrneg1; 2330 sp->sa_gid = nfs_xdrneg1; 2331 sp->sa_size = nfs_xdrneg1; 2332 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2333 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2334 } 2335 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2336 if (!error) 2337 nfsm_mtofh(dvp, newvp, v3, gotvp); 2338 if (v3) 2339 nfsm_wcc_data(dvp, wccflag, 0); 2340 nfsm_reqdone; 2341 VTONFS(dvp)->n_flag |= NMODIFIED; 2342 if (!wccflag) 2343 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2344 /* 2345 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2346 * if we can succeed in looking up the directory. 2347 */ 2348 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2349 if (newvp) { 2350 vput(newvp); 2351 newvp = (struct vnode *)0; 2352 } 2353 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2354 cnp->cn_proc, &np); 2355 if (!error) { 2356 newvp = NFSTOV(np); 2357 if (newvp->v_type != VDIR || newvp == dvp) 2358 error = EEXIST; 2359 } 2360 } 2361 if (error) { 2362 if (newvp) { 2363 if (dvp != newvp) 2364 vput(newvp); 2365 else 2366 vrele(newvp); 2367 } 2368 } else { 2369 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2370 if (cnp->cn_flags & MAKEENTRY) 2371 nfs_cache_enter(dvp, newvp, cnp); 2372 *ap->a_vpp = newvp; 2373 } 2374 PNBUF_PUT(cnp->cn_pnbuf); 2375 vput(dvp); 2376 return (error); 2377 } 2378 2379 /* 2380 * nfs remove directory call 2381 */ 2382 int 2383 nfs_rmdir(v) 2384 void *v; 2385 { 2386 struct vop_rmdir_args /* { 2387 struct vnode *a_dvp; 2388 struct vnode *a_vp; 2389 struct componentname *a_cnp; 2390 } */ *ap = v; 2391 struct vnode *vp = ap->a_vp; 2392 struct vnode *dvp = ap->a_dvp; 2393 struct componentname *cnp = ap->a_cnp; 2394 u_int32_t *tl; 2395 caddr_t cp; 2396 #ifndef NFS_V2_ONLY 2397 int32_t t1; 2398 caddr_t cp2; 2399 #endif 2400 int32_t t2; 2401 caddr_t bpos, dpos; 2402 int error = 0, wccflag = NFSV3_WCCRATTR; 2403 int rexmit; 2404 struct mbuf *mreq, *mrep, *md, *mb; 2405 const int v3 = NFS_ISV3(dvp); 2406 struct nfsnode *dnp; 2407 2408 if (dvp == vp) { 2409 vrele(dvp); 2410 vput(dvp); 2411 PNBUF_PUT(cnp->cn_pnbuf); 2412 return (EINVAL); 2413 } 2414 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2415 dnp = VTONFS(dvp); 2416 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2417 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2418 nfsm_fhtom(dnp, v3); 2419 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2420 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2421 #ifndef NFS_V2_ONLY 2422 if (v3) 2423 nfsm_wcc_data(dvp, wccflag, 0); 2424 #endif 2425 nfsm_reqdone; 2426 PNBUF_PUT(cnp->cn_pnbuf); 2427 VTONFS(dvp)->n_flag |= NMODIFIED; 2428 if (!wccflag) 2429 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2430 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2431 VN_KNOTE(vp, NOTE_DELETE); 2432 cache_purge(vp); 2433 vput(vp); 2434 vput(dvp); 2435 /* 2436 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2437 */ 2438 if (rexmit && error == ENOENT) 2439 error = 0; 2440 return (error); 2441 } 2442 2443 /* 2444 * nfs readdir call 2445 */ 2446 int 2447 nfs_readdir(v) 2448 void *v; 2449 { 2450 struct vop_readdir_args /* { 2451 struct vnode *a_vp; 2452 struct uio *a_uio; 2453 struct ucred *a_cred; 2454 int *a_eofflag; 2455 off_t **a_cookies; 2456 int *a_ncookies; 2457 } */ *ap = v; 2458 struct vnode *vp = ap->a_vp; 2459 struct uio *uio = ap->a_uio; 2460 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2461 char *base = uio->uio_iov->iov_base; 2462 int tresid, error; 2463 size_t count, lost; 2464 struct dirent *dp; 2465 off_t *cookies = NULL; 2466 int ncookies = 0, nc; 2467 2468 if (vp->v_type != VDIR) 2469 return (EPERM); 2470 2471 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2472 count = uio->uio_resid - lost; 2473 if (count <= 0) 2474 return (EINVAL); 2475 2476 /* 2477 * Call nfs_bioread() to do the real work. 2478 */ 2479 tresid = uio->uio_resid = count; 2480 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2481 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2482 2483 if (!error && ap->a_cookies) { 2484 ncookies = count / 16; 2485 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2486 *ap->a_cookies = cookies; 2487 } 2488 2489 if (!error && uio->uio_resid == tresid) { 2490 uio->uio_resid += lost; 2491 nfsstats.direofcache_misses++; 2492 if (ap->a_cookies) 2493 *ap->a_ncookies = 0; 2494 *ap->a_eofflag = 1; 2495 return (0); 2496 } 2497 2498 if (!error && ap->a_cookies) { 2499 /* 2500 * Only the NFS server and emulations use cookies, and they 2501 * load the directory block into system space, so we can 2502 * just look at it directly. 2503 */ 2504 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2505 panic("nfs_readdir: lost in space"); 2506 for (nc = 0; ncookies-- && 2507 base < (char *)uio->uio_iov->iov_base; nc++){ 2508 dp = (struct dirent *) base; 2509 if (dp->d_reclen == 0) 2510 break; 2511 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2512 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2513 else 2514 *(cookies++) = NFS_GETCOOKIE(dp); 2515 base += dp->d_reclen; 2516 } 2517 uio->uio_resid += 2518 ((caddr_t)uio->uio_iov->iov_base - base); 2519 uio->uio_iov->iov_len += 2520 ((caddr_t)uio->uio_iov->iov_base - base); 2521 uio->uio_iov->iov_base = base; 2522 *ap->a_ncookies = nc; 2523 } 2524 2525 uio->uio_resid += lost; 2526 *ap->a_eofflag = 0; 2527 return (error); 2528 } 2529 2530 /* 2531 * Readdir rpc call. 2532 * Called from below the buffer cache by nfs_doio(). 2533 */ 2534 int 2535 nfs_readdirrpc(vp, uiop, cred) 2536 struct vnode *vp; 2537 struct uio *uiop; 2538 struct ucred *cred; 2539 { 2540 int len, left; 2541 struct dirent *dp = NULL; 2542 u_int32_t *tl; 2543 caddr_t cp; 2544 int32_t t1, t2; 2545 caddr_t bpos, dpos, cp2; 2546 struct mbuf *mreq, *mrep, *md, *mb; 2547 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2548 struct nfsnode *dnp = VTONFS(vp); 2549 u_quad_t fileno; 2550 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2551 #ifndef NFS_V2_ONLY 2552 int attrflag; 2553 #endif 2554 int nrpcs = 0, reclen; 2555 const int v3 = NFS_ISV3(vp); 2556 2557 #ifdef DIAGNOSTIC 2558 /* 2559 * Should be called from buffer cache, so only amount of 2560 * NFS_DIRBLKSIZ will be requested. 2561 */ 2562 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2563 panic("nfs readdirrpc bad uio"); 2564 #endif 2565 2566 /* 2567 * Loop around doing readdir rpc's of size nm_readdirsize 2568 * truncated to a multiple of NFS_DIRFRAGSIZ. 2569 * The stopping criteria is EOF or buffer full. 2570 */ 2571 while (more_dirs && bigenough) { 2572 /* 2573 * Heuristic: don't bother to do another RPC to further 2574 * fill up this block if there is not much room left. (< 50% 2575 * of the readdir RPC size). This wastes some buffer space 2576 * but can save up to 50% in RPC calls. 2577 */ 2578 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2579 bigenough = 0; 2580 break; 2581 } 2582 nfsstats.rpccnt[NFSPROC_READDIR]++; 2583 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2584 NFSX_READDIR(v3)); 2585 nfsm_fhtom(dnp, v3); 2586 #ifndef NFS_V2_ONLY 2587 if (v3) { 2588 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2589 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2590 txdr_swapcookie3(uiop->uio_offset, tl); 2591 } else { 2592 txdr_cookie3(uiop->uio_offset, tl); 2593 } 2594 tl += 2; 2595 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2596 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2597 } else 2598 #endif 2599 { 2600 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2601 *tl++ = txdr_unsigned(uiop->uio_offset); 2602 } 2603 *tl = txdr_unsigned(nmp->nm_readdirsize); 2604 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2605 nrpcs++; 2606 #ifndef NFS_V2_ONLY 2607 if (v3) { 2608 nfsm_postop_attr(vp, attrflag, 0); 2609 if (!error) { 2610 nfsm_dissect(tl, u_int32_t *, 2611 2 * NFSX_UNSIGNED); 2612 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2613 dnp->n_cookieverf.nfsuquad[1] = *tl; 2614 } else { 2615 m_freem(mrep); 2616 goto nfsmout; 2617 } 2618 } 2619 #endif 2620 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2621 more_dirs = fxdr_unsigned(int, *tl); 2622 2623 /* loop thru the dir entries, doctoring them to 4bsd form */ 2624 while (more_dirs && bigenough) { 2625 #ifndef NFS_V2_ONLY 2626 if (v3) { 2627 nfsm_dissect(tl, u_int32_t *, 2628 3 * NFSX_UNSIGNED); 2629 fileno = fxdr_hyper(tl); 2630 len = fxdr_unsigned(int, *(tl + 2)); 2631 } else 2632 #endif 2633 { 2634 nfsm_dissect(tl, u_int32_t *, 2635 2 * NFSX_UNSIGNED); 2636 fileno = fxdr_unsigned(u_quad_t, *tl++); 2637 len = fxdr_unsigned(int, *tl); 2638 } 2639 if (len <= 0 || len > NFS_MAXNAMLEN) { 2640 error = EBADRPC; 2641 m_freem(mrep); 2642 goto nfsmout; 2643 } 2644 tlen = nfsm_rndup(len); 2645 if (tlen == len) 2646 tlen += 4; /* To ensure null termination */ 2647 tlen += sizeof (off_t) + sizeof (int); 2648 reclen = ALIGN(tlen + DIRHDSIZ); 2649 tlen = reclen - DIRHDSIZ; 2650 left = NFS_DIRFRAGSIZ - blksiz; 2651 if (reclen > left) { 2652 dp->d_reclen += left; 2653 uiop->uio_iov->iov_base = 2654 (caddr_t)uiop->uio_iov->iov_base + left; 2655 uiop->uio_iov->iov_len -= left; 2656 uiop->uio_resid -= left; 2657 blksiz = 0; 2658 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2659 } 2660 if (reclen > uiop->uio_resid) 2661 bigenough = 0; 2662 if (bigenough) { 2663 dp = (struct dirent *)uiop->uio_iov->iov_base; 2664 dp->d_fileno = (int)fileno; 2665 dp->d_namlen = len; 2666 dp->d_reclen = reclen; 2667 dp->d_type = DT_UNKNOWN; 2668 blksiz += dp->d_reclen; 2669 if (blksiz == NFS_DIRFRAGSIZ) 2670 blksiz = 0; 2671 uiop->uio_resid -= DIRHDSIZ; 2672 uiop->uio_iov->iov_base = 2673 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2674 uiop->uio_iov->iov_len -= DIRHDSIZ; 2675 nfsm_mtouio(uiop, len); 2676 cp = uiop->uio_iov->iov_base; 2677 tlen -= len; 2678 *cp = '\0'; /* null terminate */ 2679 uiop->uio_iov->iov_base = 2680 (caddr_t)uiop->uio_iov->iov_base + tlen; 2681 uiop->uio_iov->iov_len -= tlen; 2682 uiop->uio_resid -= tlen; 2683 } else 2684 nfsm_adv(nfsm_rndup(len)); 2685 #ifndef NFS_V2_ONLY 2686 if (v3) { 2687 nfsm_dissect(tl, u_int32_t *, 2688 3 * NFSX_UNSIGNED); 2689 } else 2690 #endif 2691 { 2692 nfsm_dissect(tl, u_int32_t *, 2693 2 * NFSX_UNSIGNED); 2694 } 2695 if (bigenough) { 2696 #ifndef NFS_V2_ONLY 2697 if (v3) { 2698 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2699 uiop->uio_offset = 2700 fxdr_swapcookie3(tl); 2701 else 2702 uiop->uio_offset = 2703 fxdr_cookie3(tl); 2704 } 2705 else 2706 #endif 2707 { 2708 uiop->uio_offset = 2709 fxdr_unsigned(off_t, *tl); 2710 } 2711 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2712 } 2713 if (v3) 2714 tl += 2; 2715 else 2716 tl++; 2717 more_dirs = fxdr_unsigned(int, *tl); 2718 } 2719 /* 2720 * If at end of rpc data, get the eof boolean 2721 */ 2722 if (!more_dirs) { 2723 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2724 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2725 } 2726 m_freem(mrep); 2727 } 2728 /* 2729 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2730 * by increasing d_reclen for the last record. 2731 */ 2732 if (blksiz > 0) { 2733 left = NFS_DIRFRAGSIZ - blksiz; 2734 dp->d_reclen += left; 2735 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2736 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2737 left; 2738 uiop->uio_iov->iov_len -= left; 2739 uiop->uio_resid -= left; 2740 } 2741 2742 /* 2743 * We are now either at the end of the directory or have filled the 2744 * block. 2745 */ 2746 if (bigenough) 2747 dnp->n_direofoffset = uiop->uio_offset; 2748 nfsmout: 2749 return (error); 2750 } 2751 2752 #ifndef NFS_V2_ONLY 2753 /* 2754 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2755 */ 2756 int 2757 nfs_readdirplusrpc(vp, uiop, cred) 2758 struct vnode *vp; 2759 struct uio *uiop; 2760 struct ucred *cred; 2761 { 2762 int len, left; 2763 struct dirent *dp = NULL; 2764 u_int32_t *tl; 2765 caddr_t cp; 2766 int32_t t1, t2; 2767 struct vnode *newvp; 2768 caddr_t bpos, dpos, cp2; 2769 struct mbuf *mreq, *mrep, *md, *mb; 2770 struct nameidata nami, *ndp = &nami; 2771 struct componentname *cnp = &ndp->ni_cnd; 2772 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2773 struct nfsnode *dnp = VTONFS(vp), *np; 2774 nfsfh_t *fhp; 2775 u_quad_t fileno; 2776 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2777 int attrflag, fhsize, nrpcs = 0, reclen; 2778 struct nfs_fattr fattr, *fp; 2779 2780 #ifdef DIAGNOSTIC 2781 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2782 panic("nfs readdirplusrpc bad uio"); 2783 #endif 2784 ndp->ni_dvp = vp; 2785 newvp = NULLVP; 2786 2787 /* 2788 * Loop around doing readdir rpc's of size nm_readdirsize 2789 * truncated to a multiple of NFS_DIRFRAGSIZ. 2790 * The stopping criteria is EOF or buffer full. 2791 */ 2792 while (more_dirs && bigenough) { 2793 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2794 bigenough = 0; 2795 break; 2796 } 2797 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2798 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2799 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2800 nfsm_fhtom(dnp, 1); 2801 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2802 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2803 txdr_swapcookie3(uiop->uio_offset, tl); 2804 } else { 2805 txdr_cookie3(uiop->uio_offset, tl); 2806 } 2807 tl += 2; 2808 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2809 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2810 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2811 *tl = txdr_unsigned(nmp->nm_rsize); 2812 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2813 nfsm_postop_attr(vp, attrflag, 0); 2814 if (error) { 2815 m_freem(mrep); 2816 goto nfsmout; 2817 } 2818 nrpcs++; 2819 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2820 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2821 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2822 more_dirs = fxdr_unsigned(int, *tl); 2823 2824 /* loop thru the dir entries, doctoring them to 4bsd form */ 2825 while (more_dirs && bigenough) { 2826 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2827 fileno = fxdr_hyper(tl); 2828 len = fxdr_unsigned(int, *(tl + 2)); 2829 if (len <= 0 || len > NFS_MAXNAMLEN) { 2830 error = EBADRPC; 2831 m_freem(mrep); 2832 goto nfsmout; 2833 } 2834 tlen = nfsm_rndup(len); 2835 if (tlen == len) 2836 tlen += 4; /* To ensure null termination*/ 2837 tlen += sizeof (off_t) + sizeof (int); 2838 reclen = ALIGN(tlen + DIRHDSIZ); 2839 tlen = reclen - DIRHDSIZ; 2840 left = NFS_DIRFRAGSIZ - blksiz; 2841 if (reclen > left) { 2842 /* 2843 * DIRFRAGSIZ is aligned, no need to align 2844 * again here. 2845 */ 2846 dp->d_reclen += left; 2847 uiop->uio_iov->iov_base = 2848 (caddr_t)uiop->uio_iov->iov_base + left; 2849 uiop->uio_iov->iov_len -= left; 2850 uiop->uio_resid -= left; 2851 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2852 blksiz = 0; 2853 } 2854 if (reclen > uiop->uio_resid) 2855 bigenough = 0; 2856 if (bigenough) { 2857 dp = (struct dirent *)uiop->uio_iov->iov_base; 2858 dp->d_fileno = (int)fileno; 2859 dp->d_namlen = len; 2860 dp->d_reclen = reclen; 2861 dp->d_type = DT_UNKNOWN; 2862 blksiz += dp->d_reclen; 2863 if (blksiz == NFS_DIRFRAGSIZ) 2864 blksiz = 0; 2865 uiop->uio_resid -= DIRHDSIZ; 2866 uiop->uio_iov->iov_base = 2867 (caddr_t)uiop->uio_iov->iov_base + 2868 DIRHDSIZ; 2869 uiop->uio_iov->iov_len -= DIRHDSIZ; 2870 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2871 cnp->cn_namelen = len; 2872 nfsm_mtouio(uiop, len); 2873 cp = uiop->uio_iov->iov_base; 2874 tlen -= len; 2875 *cp = '\0'; 2876 uiop->uio_iov->iov_base = 2877 (caddr_t)uiop->uio_iov->iov_base + tlen; 2878 uiop->uio_iov->iov_len -= tlen; 2879 uiop->uio_resid -= tlen; 2880 } else 2881 nfsm_adv(nfsm_rndup(len)); 2882 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2883 if (bigenough) { 2884 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2885 uiop->uio_offset = 2886 fxdr_swapcookie3(tl); 2887 else 2888 uiop->uio_offset = 2889 fxdr_cookie3(tl); 2890 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2891 } 2892 tl += 2; 2893 2894 /* 2895 * Since the attributes are before the file handle 2896 * (sigh), we must skip over the attributes and then 2897 * come back and get them. 2898 */ 2899 attrflag = fxdr_unsigned(int, *tl); 2900 if (attrflag) { 2901 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2902 memcpy(&fattr, fp, NFSX_V3FATTR); 2903 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2904 doit = fxdr_unsigned(int, *tl); 2905 if (doit) { 2906 nfsm_getfh(fhp, fhsize, 1); 2907 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2908 VREF(vp); 2909 newvp = vp; 2910 np = dnp; 2911 } else { 2912 error = nfs_nget1(vp->v_mount, fhp, 2913 fhsize, &np, LK_NOWAIT); 2914 if (!error) 2915 newvp = NFSTOV(np); 2916 } 2917 if (!error) { 2918 const char *cp; 2919 2920 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2921 dp->d_type = 2922 IFTODT(VTTOIF(np->n_vattr->va_type)); 2923 ndp->ni_vp = newvp; 2924 cp = cnp->cn_nameptr + cnp->cn_namelen; 2925 cnp->cn_hash = 2926 namei_hash(cnp->cn_nameptr, &cp); 2927 if (cnp->cn_namelen <= NCHNAMLEN) { 2928 cache_purge1(ndp->ni_dvp, cnp, 0); 2929 nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, 2930 cnp); 2931 } 2932 } 2933 } 2934 } else { 2935 /* Just skip over the file handle */ 2936 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2937 i = fxdr_unsigned(int, *tl); 2938 nfsm_adv(nfsm_rndup(i)); 2939 } 2940 if (newvp != NULLVP) { 2941 if (newvp == vp) 2942 vrele(newvp); 2943 else 2944 vput(newvp); 2945 newvp = NULLVP; 2946 } 2947 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2948 more_dirs = fxdr_unsigned(int, *tl); 2949 } 2950 /* 2951 * If at end of rpc data, get the eof boolean 2952 */ 2953 if (!more_dirs) { 2954 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2955 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2956 } 2957 m_freem(mrep); 2958 } 2959 /* 2960 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2961 * by increasing d_reclen for the last record. 2962 */ 2963 if (blksiz > 0) { 2964 left = NFS_DIRFRAGSIZ - blksiz; 2965 dp->d_reclen += left; 2966 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2967 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2968 left; 2969 uiop->uio_iov->iov_len -= left; 2970 uiop->uio_resid -= left; 2971 } 2972 2973 /* 2974 * We are now either at the end of the directory or have filled the 2975 * block. 2976 */ 2977 if (bigenough) 2978 dnp->n_direofoffset = uiop->uio_offset; 2979 nfsmout: 2980 if (newvp != NULLVP) { 2981 if(newvp == vp) 2982 vrele(newvp); 2983 else 2984 vput(newvp); 2985 } 2986 return (error); 2987 } 2988 #endif 2989 2990 static char hextoasc[] = "0123456789abcdef"; 2991 2992 /* 2993 * Silly rename. To make the NFS filesystem that is stateless look a little 2994 * more like the "ufs" a remove of an active vnode is translated to a rename 2995 * to a funny looking filename that is removed by nfs_inactive on the 2996 * nfsnode. There is the potential for another process on a different client 2997 * to create the same funny name between the nfs_lookitup() fails and the 2998 * nfs_rename() completes, but... 2999 */ 3000 int 3001 nfs_sillyrename(dvp, vp, cnp) 3002 struct vnode *dvp, *vp; 3003 struct componentname *cnp; 3004 { 3005 struct sillyrename *sp; 3006 struct nfsnode *np; 3007 int error; 3008 short pid; 3009 3010 cache_purge(dvp); 3011 np = VTONFS(vp); 3012 #ifndef DIAGNOSTIC 3013 if (vp->v_type == VDIR) 3014 panic("nfs: sillyrename dir"); 3015 #endif 3016 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3017 M_NFSREQ, M_WAITOK); 3018 sp->s_cred = crdup(cnp->cn_cred); 3019 sp->s_dvp = dvp; 3020 VREF(dvp); 3021 3022 /* Fudge together a funny name */ 3023 pid = cnp->cn_proc->p_pid; 3024 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3025 sp->s_namlen = 12; 3026 sp->s_name[8] = hextoasc[pid & 0xf]; 3027 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 3028 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 3029 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 3030 3031 /* Try lookitups until we get one that isn't there */ 3032 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3033 cnp->cn_proc, (struct nfsnode **)0) == 0) { 3034 sp->s_name[4]++; 3035 if (sp->s_name[4] > 'z') { 3036 error = EINVAL; 3037 goto bad; 3038 } 3039 } 3040 error = nfs_renameit(dvp, cnp, sp); 3041 if (error) 3042 goto bad; 3043 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3044 cnp->cn_proc, &np); 3045 np->n_sillyrename = sp; 3046 return (0); 3047 bad: 3048 vrele(sp->s_dvp); 3049 crfree(sp->s_cred); 3050 free((caddr_t)sp, M_NFSREQ); 3051 return (error); 3052 } 3053 3054 /* 3055 * Look up a file name and optionally either update the file handle or 3056 * allocate an nfsnode, depending on the value of npp. 3057 * npp == NULL --> just do the lookup 3058 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3059 * handled too 3060 * *npp != NULL --> update the file handle in the vnode 3061 */ 3062 int 3063 nfs_lookitup(dvp, name, len, cred, procp, npp) 3064 struct vnode *dvp; 3065 const char *name; 3066 int len; 3067 struct ucred *cred; 3068 struct proc *procp; 3069 struct nfsnode **npp; 3070 { 3071 u_int32_t *tl; 3072 caddr_t cp; 3073 int32_t t1, t2; 3074 struct vnode *newvp = (struct vnode *)0; 3075 struct nfsnode *np, *dnp = VTONFS(dvp); 3076 caddr_t bpos, dpos, cp2; 3077 int error = 0, fhlen; 3078 #ifndef NFS_V2_ONLY 3079 int attrflag; 3080 #endif 3081 struct mbuf *mreq, *mrep, *md, *mb; 3082 nfsfh_t *nfhp; 3083 const int v3 = NFS_ISV3(dvp); 3084 3085 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3086 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3087 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3088 nfsm_fhtom(dnp, v3); 3089 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3090 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 3091 if (npp && !error) { 3092 nfsm_getfh(nfhp, fhlen, v3); 3093 if (*npp) { 3094 np = *npp; 3095 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3096 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3097 np->n_fhp = &np->n_fh; 3098 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3099 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3100 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3101 np->n_fhsize = fhlen; 3102 newvp = NFSTOV(np); 3103 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3104 VREF(dvp); 3105 newvp = dvp; 3106 np = dnp; 3107 } else { 3108 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3109 if (error) { 3110 m_freem(mrep); 3111 return (error); 3112 } 3113 newvp = NFSTOV(np); 3114 } 3115 #ifndef NFS_V2_ONLY 3116 if (v3) { 3117 nfsm_postop_attr(newvp, attrflag, 0); 3118 if (!attrflag && *npp == NULL) { 3119 m_freem(mrep); 3120 vput(newvp); 3121 return (ENOENT); 3122 } 3123 } else 3124 #endif 3125 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3126 } 3127 nfsm_reqdone; 3128 if (npp && *npp == NULL) { 3129 if (error) { 3130 if (newvp) 3131 vput(newvp); 3132 } else 3133 *npp = np; 3134 } 3135 return (error); 3136 } 3137 3138 #ifndef NFS_V2_ONLY 3139 /* 3140 * Nfs Version 3 commit rpc 3141 */ 3142 int 3143 nfs_commit(vp, offset, cnt, procp) 3144 struct vnode *vp; 3145 off_t offset; 3146 uint32_t cnt; 3147 struct proc *procp; 3148 { 3149 caddr_t cp; 3150 u_int32_t *tl; 3151 int32_t t1, t2; 3152 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3153 caddr_t bpos, dpos, cp2; 3154 int error = 0, wccflag = NFSV3_WCCRATTR; 3155 struct mbuf *mreq, *mrep, *md, *mb; 3156 struct nfsnode *np; 3157 3158 KASSERT(NFS_ISV3(vp)); 3159 3160 #ifdef NFS_DEBUG_COMMIT 3161 printf("commit %lu - %lu\n", (unsigned long)offset, 3162 (unsigned long)(offset + cnt)); 3163 #endif 3164 3165 simple_lock(&nmp->nm_slock); 3166 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3167 simple_unlock(&nmp->nm_slock); 3168 return (0); 3169 } 3170 simple_unlock(&nmp->nm_slock); 3171 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3172 np = VTONFS(vp); 3173 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3174 nfsm_fhtom(np, 1); 3175 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3176 txdr_hyper(offset, tl); 3177 tl += 2; 3178 *tl = txdr_unsigned(cnt); 3179 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3180 nfsm_wcc_data(vp, wccflag, 0); 3181 if (!error) { 3182 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3183 simple_lock(&nmp->nm_slock); 3184 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3185 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3186 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3187 error = NFSERR_STALEWRITEVERF; 3188 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3189 } 3190 simple_unlock(&nmp->nm_slock); 3191 } 3192 nfsm_reqdone; 3193 return (error); 3194 } 3195 #endif 3196 3197 /* 3198 * Kludge City.. 3199 * - make nfs_bmap() essentially a no-op that does no translation 3200 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3201 * (Maybe I could use the process's page mapping, but I was concerned that 3202 * Kernel Write might not be enabled and also figured copyout() would do 3203 * a lot more work than memcpy() and also it currently happens in the 3204 * context of the swapper process (2). 3205 */ 3206 int 3207 nfs_bmap(v) 3208 void *v; 3209 { 3210 struct vop_bmap_args /* { 3211 struct vnode *a_vp; 3212 daddr_t a_bn; 3213 struct vnode **a_vpp; 3214 daddr_t *a_bnp; 3215 int *a_runp; 3216 } */ *ap = v; 3217 struct vnode *vp = ap->a_vp; 3218 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3219 3220 if (ap->a_vpp != NULL) 3221 *ap->a_vpp = vp; 3222 if (ap->a_bnp != NULL) 3223 *ap->a_bnp = ap->a_bn << bshift; 3224 if (ap->a_runp != NULL) 3225 *ap->a_runp = 1024 * 1024; /* XXX */ 3226 return (0); 3227 } 3228 3229 /* 3230 * Strategy routine. 3231 * For async requests when nfsiod(s) are running, queue the request by 3232 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3233 * request. 3234 */ 3235 int 3236 nfs_strategy(v) 3237 void *v; 3238 { 3239 struct vop_strategy_args *ap = v; 3240 struct buf *bp = ap->a_bp; 3241 struct proc *p; 3242 int error = 0; 3243 3244 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3245 panic("nfs physio/async"); 3246 if (bp->b_flags & B_ASYNC) 3247 p = NULL; 3248 else 3249 p = curproc; /* XXX */ 3250 3251 /* 3252 * If the op is asynchronous and an i/o daemon is waiting 3253 * queue the request, wake it up and wait for completion 3254 * otherwise just do it ourselves. 3255 */ 3256 3257 if ((bp->b_flags & B_ASYNC) == 0 || 3258 nfs_asyncio(bp)) 3259 error = nfs_doio(bp, p); 3260 return (error); 3261 } 3262 3263 /* 3264 * fsync vnode op. Just call nfs_flush() with commit == 1. 3265 */ 3266 /* ARGSUSED */ 3267 int 3268 nfs_fsync(v) 3269 void *v; 3270 { 3271 struct vop_fsync_args /* { 3272 struct vnodeop_desc *a_desc; 3273 struct vnode * a_vp; 3274 struct ucred * a_cred; 3275 int a_flags; 3276 off_t offlo; 3277 off_t offhi; 3278 struct proc * a_p; 3279 } */ *ap = v; 3280 3281 struct vnode *vp = ap->a_vp; 3282 3283 if (vp->v_type != VREG) 3284 return 0; 3285 3286 return (nfs_flush(vp, ap->a_cred, 3287 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3288 } 3289 3290 /* 3291 * Flush all the data associated with a vnode. 3292 */ 3293 int 3294 nfs_flush(vp, cred, waitfor, p, commit) 3295 struct vnode *vp; 3296 struct ucred *cred; 3297 int waitfor; 3298 struct proc *p; 3299 int commit; 3300 { 3301 struct nfsnode *np = VTONFS(vp); 3302 int error; 3303 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3304 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3305 3306 simple_lock(&vp->v_interlock); 3307 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3308 if (np->n_flag & NWRITEERR) { 3309 error = np->n_error; 3310 np->n_flag &= ~NWRITEERR; 3311 } 3312 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3313 return (error); 3314 } 3315 3316 /* 3317 * Return POSIX pathconf information applicable to nfs. 3318 * 3319 * N.B. The NFS V2 protocol doesn't support this RPC. 3320 */ 3321 /* ARGSUSED */ 3322 int 3323 nfs_pathconf(v) 3324 void *v; 3325 { 3326 struct vop_pathconf_args /* { 3327 struct vnode *a_vp; 3328 int a_name; 3329 register_t *a_retval; 3330 } */ *ap = v; 3331 struct nfsv3_pathconf *pcp; 3332 struct vnode *vp = ap->a_vp; 3333 struct mbuf *mreq, *mrep, *md, *mb; 3334 int32_t t1, t2; 3335 u_int32_t *tl; 3336 caddr_t bpos, dpos, cp, cp2; 3337 int error = 0, attrflag; 3338 #ifndef NFS_V2_ONLY 3339 struct nfsmount *nmp; 3340 unsigned int l; 3341 u_int64_t maxsize; 3342 #endif 3343 const int v3 = NFS_ISV3(vp); 3344 struct nfsnode *np = VTONFS(vp); 3345 3346 switch (ap->a_name) { 3347 /* Names that can be resolved locally. */ 3348 case _PC_PIPE_BUF: 3349 *ap->a_retval = PIPE_BUF; 3350 break; 3351 case _PC_SYNC_IO: 3352 *ap->a_retval = 1; 3353 break; 3354 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3355 case _PC_LINK_MAX: 3356 case _PC_NAME_MAX: 3357 case _PC_CHOWN_RESTRICTED: 3358 case _PC_NO_TRUNC: 3359 if (!v3) { 3360 error = EINVAL; 3361 break; 3362 } 3363 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3364 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3365 nfsm_fhtom(np, 1); 3366 nfsm_request(np, NFSPROC_PATHCONF, 3367 curproc, curproc->p_ucred); /* XXX */ 3368 nfsm_postop_attr(vp, attrflag, 0); 3369 if (!error) { 3370 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3371 NFSX_V3PATHCONF); 3372 switch (ap->a_name) { 3373 case _PC_LINK_MAX: 3374 *ap->a_retval = 3375 fxdr_unsigned(register_t, pcp->pc_linkmax); 3376 break; 3377 case _PC_NAME_MAX: 3378 *ap->a_retval = 3379 fxdr_unsigned(register_t, pcp->pc_namemax); 3380 break; 3381 case _PC_CHOWN_RESTRICTED: 3382 *ap->a_retval = 3383 (pcp->pc_chownrestricted == nfs_true); 3384 break; 3385 case _PC_NO_TRUNC: 3386 *ap->a_retval = 3387 (pcp->pc_notrunc == nfs_true); 3388 break; 3389 } 3390 } 3391 nfsm_reqdone; 3392 break; 3393 case _PC_FILESIZEBITS: 3394 #ifndef NFS_V2_ONLY 3395 if (v3) { 3396 nmp = VFSTONFS(vp->v_mount); 3397 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3398 if ((error = nfs_fsinfo(nmp, vp, 3399 curproc->p_ucred, curproc)) != 0) /* XXX */ 3400 break; 3401 for (l = 0, maxsize = nmp->nm_maxfilesize; 3402 (maxsize >> l) > 0; l++) 3403 ; 3404 *ap->a_retval = l + 1; 3405 } else 3406 #endif 3407 { 3408 *ap->a_retval = 32; /* NFS V2 limitation */ 3409 } 3410 break; 3411 default: 3412 error = EINVAL; 3413 break; 3414 } 3415 3416 return (error); 3417 } 3418 3419 /* 3420 * NFS advisory byte-level locks. 3421 */ 3422 int 3423 nfs_advlock(v) 3424 void *v; 3425 { 3426 struct vop_advlock_args /* { 3427 struct vnode *a_vp; 3428 caddr_t a_id; 3429 int a_op; 3430 struct flock *a_fl; 3431 int a_flags; 3432 } */ *ap = v; 3433 struct nfsnode *np = VTONFS(ap->a_vp); 3434 3435 return lf_advlock(ap, &np->n_lockf, np->n_size); 3436 } 3437 3438 /* 3439 * Print out the contents of an nfsnode. 3440 */ 3441 int 3442 nfs_print(v) 3443 void *v; 3444 { 3445 struct vop_print_args /* { 3446 struct vnode *a_vp; 3447 } */ *ap = v; 3448 struct vnode *vp = ap->a_vp; 3449 struct nfsnode *np = VTONFS(vp); 3450 3451 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3452 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3453 if (vp->v_type == VFIFO) 3454 fifo_printinfo(vp); 3455 printf("\n"); 3456 return (0); 3457 } 3458 3459 /* 3460 * NFS file truncation. 3461 */ 3462 int 3463 nfs_truncate(v) 3464 void *v; 3465 { 3466 #if 0 3467 struct vop_truncate_args /* { 3468 struct vnode *a_vp; 3469 off_t a_length; 3470 int a_flags; 3471 struct ucred *a_cred; 3472 struct proc *a_p; 3473 } */ *ap = v; 3474 #endif 3475 3476 /* Use nfs_setattr */ 3477 return (EOPNOTSUPP); 3478 } 3479 3480 /* 3481 * Just call bwrite(). 3482 */ 3483 int 3484 nfs_bwrite(v) 3485 void *v; 3486 { 3487 struct vop_bwrite_args /* { 3488 struct vnode *a_bp; 3489 } */ *ap = v; 3490 3491 return (bwrite(ap->a_bp)); 3492 } 3493 3494 /* 3495 * nfs unlock wrapper. 3496 */ 3497 int 3498 nfs_unlock(void *v) 3499 { 3500 struct vop_unlock_args /* { 3501 struct vnode *a_vp; 3502 int a_flags; 3503 } */ *ap = v; 3504 struct vnode *vp = ap->a_vp; 3505 3506 /* 3507 * VOP_UNLOCK can be called by nfs_loadattrcache 3508 * with v_data == 0. 3509 */ 3510 if (VTONFS(vp)) { 3511 nfs_delayedtruncate(vp); 3512 } 3513 3514 return genfs_unlock(v); 3515 } 3516 3517 /* 3518 * nfs special file access vnode op. 3519 * Essentially just get vattr and then imitate iaccess() since the device is 3520 * local to the client. 3521 */ 3522 int 3523 nfsspec_access(v) 3524 void *v; 3525 { 3526 struct vop_access_args /* { 3527 struct vnode *a_vp; 3528 int a_mode; 3529 struct ucred *a_cred; 3530 struct proc *a_p; 3531 } */ *ap = v; 3532 struct vattr va; 3533 struct vnode *vp = ap->a_vp; 3534 int error; 3535 3536 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3537 if (error) 3538 return (error); 3539 3540 /* 3541 * Disallow write attempts on filesystems mounted read-only; 3542 * unless the file is a socket, fifo, or a block or character 3543 * device resident on the filesystem. 3544 */ 3545 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3546 switch (vp->v_type) { 3547 case VREG: 3548 case VDIR: 3549 case VLNK: 3550 return (EROFS); 3551 default: 3552 break; 3553 } 3554 } 3555 3556 return (vaccess(va.va_type, va.va_mode, 3557 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3558 } 3559 3560 /* 3561 * Read wrapper for special devices. 3562 */ 3563 int 3564 nfsspec_read(v) 3565 void *v; 3566 { 3567 struct vop_read_args /* { 3568 struct vnode *a_vp; 3569 struct uio *a_uio; 3570 int a_ioflag; 3571 struct ucred *a_cred; 3572 } */ *ap = v; 3573 struct nfsnode *np = VTONFS(ap->a_vp); 3574 3575 /* 3576 * Set access flag. 3577 */ 3578 np->n_flag |= NACC; 3579 np->n_atim.tv_sec = time.tv_sec; 3580 np->n_atim.tv_nsec = time.tv_usec * 1000; 3581 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3582 } 3583 3584 /* 3585 * Write wrapper for special devices. 3586 */ 3587 int 3588 nfsspec_write(v) 3589 void *v; 3590 { 3591 struct vop_write_args /* { 3592 struct vnode *a_vp; 3593 struct uio *a_uio; 3594 int a_ioflag; 3595 struct ucred *a_cred; 3596 } */ *ap = v; 3597 struct nfsnode *np = VTONFS(ap->a_vp); 3598 3599 /* 3600 * Set update flag. 3601 */ 3602 np->n_flag |= NUPD; 3603 np->n_mtim.tv_sec = time.tv_sec; 3604 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3605 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3606 } 3607 3608 /* 3609 * Close wrapper for special devices. 3610 * 3611 * Update the times on the nfsnode then do device close. 3612 */ 3613 int 3614 nfsspec_close(v) 3615 void *v; 3616 { 3617 struct vop_close_args /* { 3618 struct vnode *a_vp; 3619 int a_fflag; 3620 struct ucred *a_cred; 3621 struct proc *a_p; 3622 } */ *ap = v; 3623 struct vnode *vp = ap->a_vp; 3624 struct nfsnode *np = VTONFS(vp); 3625 struct vattr vattr; 3626 3627 if (np->n_flag & (NACC | NUPD)) { 3628 np->n_flag |= NCHG; 3629 if (vp->v_usecount == 1 && 3630 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3631 VATTR_NULL(&vattr); 3632 if (np->n_flag & NACC) 3633 vattr.va_atime = np->n_atim; 3634 if (np->n_flag & NUPD) 3635 vattr.va_mtime = np->n_mtim; 3636 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3637 } 3638 } 3639 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3640 } 3641 3642 /* 3643 * Read wrapper for fifos. 3644 */ 3645 int 3646 nfsfifo_read(v) 3647 void *v; 3648 { 3649 struct vop_read_args /* { 3650 struct vnode *a_vp; 3651 struct uio *a_uio; 3652 int a_ioflag; 3653 struct ucred *a_cred; 3654 } */ *ap = v; 3655 struct nfsnode *np = VTONFS(ap->a_vp); 3656 3657 /* 3658 * Set access flag. 3659 */ 3660 np->n_flag |= NACC; 3661 np->n_atim.tv_sec = time.tv_sec; 3662 np->n_atim.tv_nsec = time.tv_usec * 1000; 3663 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3664 } 3665 3666 /* 3667 * Write wrapper for fifos. 3668 */ 3669 int 3670 nfsfifo_write(v) 3671 void *v; 3672 { 3673 struct vop_write_args /* { 3674 struct vnode *a_vp; 3675 struct uio *a_uio; 3676 int a_ioflag; 3677 struct ucred *a_cred; 3678 } */ *ap = v; 3679 struct nfsnode *np = VTONFS(ap->a_vp); 3680 3681 /* 3682 * Set update flag. 3683 */ 3684 np->n_flag |= NUPD; 3685 np->n_mtim.tv_sec = time.tv_sec; 3686 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3687 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3688 } 3689 3690 /* 3691 * Close wrapper for fifos. 3692 * 3693 * Update the times on the nfsnode then do fifo close. 3694 */ 3695 int 3696 nfsfifo_close(v) 3697 void *v; 3698 { 3699 struct vop_close_args /* { 3700 struct vnode *a_vp; 3701 int a_fflag; 3702 struct ucred *a_cred; 3703 struct proc *a_p; 3704 } */ *ap = v; 3705 struct vnode *vp = ap->a_vp; 3706 struct nfsnode *np = VTONFS(vp); 3707 struct vattr vattr; 3708 3709 if (np->n_flag & (NACC | NUPD)) { 3710 if (np->n_flag & NACC) { 3711 np->n_atim.tv_sec = time.tv_sec; 3712 np->n_atim.tv_nsec = time.tv_usec * 1000; 3713 } 3714 if (np->n_flag & NUPD) { 3715 np->n_mtim.tv_sec = time.tv_sec; 3716 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3717 } 3718 np->n_flag |= NCHG; 3719 if (vp->v_usecount == 1 && 3720 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3721 VATTR_NULL(&vattr); 3722 if (np->n_flag & NACC) 3723 vattr.va_atime = np->n_atim; 3724 if (np->n_flag & NUPD) 3725 vattr.va_mtime = np->n_mtim; 3726 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3727 } 3728 } 3729 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3730 } 3731
Indexes created Mon Sep 22 13:09:51 GMT 2025