nfs_vnops.c revision 1.202
1 /* $NetBSD: nfs_vnops.c,v 1.202 2004/06/16 23:55:30 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 1.202 2004/06/16 23:55:30 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 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 892 struct vattr vattr; 893 int err2; 894 895 if (error && error != ENOENT) { 896 *vpp = NULLVP; 897 return error; 898 } 899 900 if (cnp->cn_flags & PDIRUNLOCK) { 901 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 902 if (err2 != 0) { 903 *vpp = NULLVP; 904 return err2; 905 } 906 cnp->cn_flags &= ~PDIRUNLOCK; 907 } 908 909 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 910 if (err2 != 0) { 911 if (error == 0) { 912 if (*vpp != dvp) 913 vput(*vpp); 914 else 915 vrele(*vpp); 916 } 917 *vpp = NULLVP; 918 return err2; 919 } 920 921 if (error == ENOENT) { 922 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 923 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 924 &VTONFS(dvp)->n_nctime, ==)) 925 return ENOENT; 926 cache_purge1(dvp, NULL, PURGE_CHILDREN); 927 timespecclear(&np->n_nctime); 928 goto dorpc; 929 } 930 931 newvp = *vpp; 932 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 933 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 934 { 935 nfsstats.lookupcache_hits++; 936 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 937 cnp->cn_flags |= SAVENAME; 938 if ((!lockparent || !(flags & ISLASTCN)) && 939 newvp != dvp) { 940 VOP_UNLOCK(dvp, 0); 941 cnp->cn_flags |= PDIRUNLOCK; 942 } 943 KASSERT(newvp->v_type != VNON); 944 return (0); 945 } 946 cache_purge1(newvp, NULL, PURGE_PARENTS); 947 if (newvp != dvp) 948 vput(newvp); 949 else 950 vrele(newvp); 951 *vpp = NULLVP; 952 } 953 dorpc: 954 #if 0 955 /* 956 * because nfsv3 has the same CREATE semantics as ours, 957 * we don't have to perform LOOKUPs beforehand. 958 * 959 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 960 * XXX although we have no way to know if O_EXCL is requested or not. 961 */ 962 963 if (v3 && cnp->cn_nameiop == CREATE && 964 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 965 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 966 KASSERT(lockparent); 967 cnp->cn_flags |= SAVENAME; 968 return (EJUSTRETURN); 969 } 970 #endif /* 0 */ 971 972 error = 0; 973 newvp = NULLVP; 974 nfsstats.lookupcache_misses++; 975 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 976 len = cnp->cn_namelen; 977 nfsm_reqhead(np, NFSPROC_LOOKUP, 978 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 979 nfsm_fhtom(np, v3); 980 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 981 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 982 if (error) { 983 nfsm_postop_attr(dvp, attrflag, 0); 984 m_freem(mrep); 985 goto nfsmout; 986 } 987 nfsm_getfh(fhp, fhsize, v3); 988 989 /* 990 * Handle RENAME case... 991 */ 992 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 993 if (NFS_CMPFH(np, fhp, fhsize)) { 994 m_freem(mrep); 995 return (EISDIR); 996 } 997 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 998 if (error) { 999 m_freem(mrep); 1000 return error; 1001 } 1002 newvp = NFSTOV(np); 1003 #ifndef NFS_V2_ONLY 1004 if (v3) { 1005 nfsm_postop_attr(newvp, attrflag, 0); 1006 nfsm_postop_attr(dvp, attrflag, 0); 1007 } else 1008 #endif 1009 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1010 *vpp = newvp; 1011 m_freem(mrep); 1012 cnp->cn_flags |= SAVENAME; 1013 if (!lockparent) { 1014 VOP_UNLOCK(dvp, 0); 1015 cnp->cn_flags |= PDIRUNLOCK; 1016 } 1017 goto validate; 1018 } 1019 1020 /* 1021 * The postop attr handling is duplicated for each if case, 1022 * because it should be done while dvp is locked (unlocking 1023 * dvp is different for each case). 1024 */ 1025 1026 if (NFS_CMPFH(np, fhp, fhsize)) { 1027 /* 1028 * "." lookup 1029 */ 1030 VREF(dvp); 1031 newvp = dvp; 1032 #ifndef NFS_V2_ONLY 1033 if (v3) { 1034 nfsm_postop_attr(newvp, attrflag, 0); 1035 nfsm_postop_attr(dvp, attrflag, 0); 1036 } else 1037 #endif 1038 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1039 } else if (flags & ISDOTDOT) { 1040 /* 1041 * ".." lookup 1042 */ 1043 VOP_UNLOCK(dvp, 0); 1044 cnp->cn_flags |= PDIRUNLOCK; 1045 1046 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1047 if (error) { 1048 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1049 cnp->cn_flags &= ~PDIRUNLOCK; 1050 m_freem(mrep); 1051 return error; 1052 } 1053 newvp = NFSTOV(np); 1054 1055 #ifndef NFS_V2_ONLY 1056 if (v3) { 1057 nfsm_postop_attr(newvp, attrflag, 0); 1058 nfsm_postop_attr(dvp, attrflag, 0); 1059 } else 1060 #endif 1061 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1062 1063 if (lockparent && (flags & ISLASTCN)) { 1064 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1065 m_freem(mrep); 1066 vput(newvp); 1067 return error; 1068 } 1069 cnp->cn_flags &= ~PDIRUNLOCK; 1070 } 1071 } else { 1072 /* 1073 * Other lookups. 1074 */ 1075 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1076 if (error) { 1077 m_freem(mrep); 1078 return error; 1079 } 1080 newvp = NFSTOV(np); 1081 #ifndef NFS_V2_ONLY 1082 if (v3) { 1083 nfsm_postop_attr(newvp, attrflag, 0); 1084 nfsm_postop_attr(dvp, attrflag, 0); 1085 } else 1086 #endif 1087 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1088 if (!lockparent || !(flags & ISLASTCN)) { 1089 VOP_UNLOCK(dvp, 0); 1090 cnp->cn_flags |= PDIRUNLOCK; 1091 } 1092 } 1093 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1094 cnp->cn_flags |= SAVENAME; 1095 if ((cnp->cn_flags & MAKEENTRY) && 1096 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1097 nfs_cache_enter(dvp, newvp, cnp); 1098 } 1099 *vpp = newvp; 1100 nfsm_reqdone; 1101 if (error) { 1102 /* 1103 * We get here only because of errors returned by 1104 * the RPC. Otherwise we'll have returned above 1105 * (the nfsm_* macros will jump to nfsm_reqdone 1106 * on error). 1107 */ 1108 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1109 cnp->cn_nameiop != CREATE) { 1110 nfs_cache_enter(dvp, NULL, cnp); 1111 } 1112 if (newvp != NULLVP) { 1113 vrele(newvp); 1114 if (newvp != dvp) 1115 VOP_UNLOCK(newvp, 0); 1116 } 1117 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1118 (flags & ISLASTCN) && error == ENOENT) { 1119 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1120 error = EROFS; 1121 else 1122 error = EJUSTRETURN; 1123 } 1124 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1125 cnp->cn_flags |= SAVENAME; 1126 *vpp = NULL; 1127 return error; 1128 } 1129 1130 validate: 1131 /* 1132 * make sure we have valid type and size. 1133 */ 1134 1135 newvp = *vpp; 1136 if (newvp->v_type == VNON) { 1137 struct vattr vattr; /* dummy */ 1138 1139 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1140 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1141 if (error) { 1142 vput(newvp); 1143 *vpp = NULL; 1144 } 1145 } 1146 1147 return error; 1148 } 1149 1150 /* 1151 * nfs read call. 1152 * Just call nfs_bioread() to do the work. 1153 */ 1154 int 1155 nfs_read(v) 1156 void *v; 1157 { 1158 struct vop_read_args /* { 1159 struct vnode *a_vp; 1160 struct uio *a_uio; 1161 int a_ioflag; 1162 struct ucred *a_cred; 1163 } */ *ap = v; 1164 struct vnode *vp = ap->a_vp; 1165 1166 if (vp->v_type != VREG) 1167 return (EPERM); 1168 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1169 } 1170 1171 /* 1172 * nfs readlink call 1173 */ 1174 int 1175 nfs_readlink(v) 1176 void *v; 1177 { 1178 struct vop_readlink_args /* { 1179 struct vnode *a_vp; 1180 struct uio *a_uio; 1181 struct ucred *a_cred; 1182 } */ *ap = v; 1183 struct vnode *vp = ap->a_vp; 1184 1185 if (vp->v_type != VLNK) 1186 return (EPERM); 1187 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1188 } 1189 1190 /* 1191 * Do a readlink rpc. 1192 * Called by nfs_doio() from below the buffer cache. 1193 */ 1194 int 1195 nfs_readlinkrpc(vp, uiop, cred) 1196 struct vnode *vp; 1197 struct uio *uiop; 1198 struct ucred *cred; 1199 { 1200 u_int32_t *tl; 1201 caddr_t cp; 1202 int32_t t1, t2; 1203 caddr_t bpos, dpos, cp2; 1204 int error = 0; 1205 uint32_t len; 1206 struct mbuf *mreq, *mrep, *md, *mb; 1207 const int v3 = NFS_ISV3(vp); 1208 struct nfsnode *np = VTONFS(vp); 1209 #ifndef NFS_V2_ONLY 1210 int attrflag; 1211 #endif 1212 1213 nfsstats.rpccnt[NFSPROC_READLINK]++; 1214 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1215 nfsm_fhtom(np, v3); 1216 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1217 #ifndef NFS_V2_ONLY 1218 if (v3) 1219 nfsm_postop_attr(vp, attrflag, 0); 1220 #endif 1221 if (!error) { 1222 #ifndef NFS_V2_ONLY 1223 if (v3) { 1224 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1225 len = fxdr_unsigned(uint32_t, *tl); 1226 if (len > MAXPATHLEN) { 1227 /* 1228 * this pathname is too long for us. 1229 */ 1230 m_freem(mrep); 1231 /* Solaris returns EINVAL. should we follow? */ 1232 error = ENAMETOOLONG; 1233 goto nfsmout; 1234 } 1235 } else 1236 #endif 1237 { 1238 nfsm_strsiz(len, NFS_MAXPATHLEN); 1239 } 1240 nfsm_mtouio(uiop, len); 1241 } 1242 nfsm_reqdone; 1243 return (error); 1244 } 1245 1246 /* 1247 * nfs read rpc call 1248 * Ditto above 1249 */ 1250 int 1251 nfs_readrpc(vp, uiop) 1252 struct vnode *vp; 1253 struct uio *uiop; 1254 { 1255 u_int32_t *tl; 1256 caddr_t cp; 1257 int32_t t1, t2; 1258 caddr_t bpos, dpos, cp2; 1259 struct mbuf *mreq, *mrep, *md, *mb; 1260 struct nfsmount *nmp; 1261 int error = 0, len, retlen, tsiz, eof; 1262 const int v3 = NFS_ISV3(vp); 1263 struct nfsnode *np = VTONFS(vp); 1264 #ifndef NFS_V2_ONLY 1265 int attrflag; 1266 #endif 1267 1268 #ifndef nolint 1269 eof = 0; 1270 #endif 1271 nmp = VFSTONFS(vp->v_mount); 1272 tsiz = uiop->uio_resid; 1273 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1274 return (EFBIG); 1275 while (tsiz > 0) { 1276 nfsstats.rpccnt[NFSPROC_READ]++; 1277 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1278 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1279 nfsm_fhtom(np, v3); 1280 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1281 #ifndef NFS_V2_ONLY 1282 if (v3) { 1283 txdr_hyper(uiop->uio_offset, tl); 1284 *(tl + 2) = txdr_unsigned(len); 1285 } else 1286 #endif 1287 { 1288 *tl++ = txdr_unsigned(uiop->uio_offset); 1289 *tl++ = txdr_unsigned(len); 1290 *tl = 0; 1291 } 1292 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1293 #ifndef NFS_V2_ONLY 1294 if (v3) { 1295 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1296 if (error) { 1297 m_freem(mrep); 1298 goto nfsmout; 1299 } 1300 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1301 eof = fxdr_unsigned(int, *(tl + 1)); 1302 } else 1303 #endif 1304 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1305 nfsm_strsiz(retlen, nmp->nm_rsize); 1306 nfsm_mtouio(uiop, retlen); 1307 m_freem(mrep); 1308 tsiz -= retlen; 1309 #ifndef NFS_V2_ONLY 1310 if (v3) { 1311 if (eof || retlen == 0) 1312 tsiz = 0; 1313 } else 1314 #endif 1315 if (retlen < len) 1316 tsiz = 0; 1317 } 1318 nfsmout: 1319 return (error); 1320 } 1321 1322 struct nfs_writerpc_context { 1323 struct simplelock nwc_slock; 1324 volatile int nwc_mbufcount; 1325 }; 1326 1327 /* 1328 * free mbuf used to refer protected pages while write rpc call. 1329 * called at splvm. 1330 */ 1331 static void 1332 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1333 { 1334 struct nfs_writerpc_context *ctx = arg; 1335 1336 KASSERT(m != NULL); 1337 KASSERT(ctx != NULL); 1338 pool_cache_put(&mbpool_cache, m); 1339 simple_lock(&ctx->nwc_slock); 1340 if (--ctx->nwc_mbufcount == 0) { 1341 wakeup(ctx); 1342 } 1343 simple_unlock(&ctx->nwc_slock); 1344 } 1345 1346 /* 1347 * nfs write call 1348 */ 1349 int 1350 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1351 struct vnode *vp; 1352 struct uio *uiop; 1353 int *iomode; 1354 boolean_t pageprotected; 1355 boolean_t *stalewriteverfp; 1356 { 1357 u_int32_t *tl; 1358 caddr_t cp; 1359 int32_t t1, t2; 1360 caddr_t bpos, dpos; 1361 struct mbuf *mreq, *mrep, *md, *mb; 1362 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1363 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1364 const int v3 = NFS_ISV3(vp); 1365 int committed = NFSV3WRITE_FILESYNC; 1366 struct nfsnode *np = VTONFS(vp); 1367 struct nfs_writerpc_context ctx; 1368 int s; 1369 struct lwp *l = NULL; 1370 size_t origresid; 1371 #ifndef NFS_V2_ONLY 1372 caddr_t cp2; 1373 int rlen, commit; 1374 #endif 1375 1376 simple_lock_init(&ctx.nwc_slock); 1377 ctx.nwc_mbufcount = 1; 1378 1379 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1380 panic("writerpc readonly vp %p", vp); 1381 } 1382 1383 #ifdef DIAGNOSTIC 1384 if (uiop->uio_iovcnt != 1) 1385 panic("nfs: writerpc iovcnt > 1"); 1386 #endif 1387 tsiz = uiop->uio_resid; 1388 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1389 return (EFBIG); 1390 if (pageprotected) { 1391 l = curlwp; 1392 PHOLD(l); 1393 } 1394 retry: 1395 origresid = uiop->uio_resid; 1396 KASSERT(origresid == uiop->uio_iov->iov_len); 1397 while (tsiz > 0) { 1398 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1399 uint32_t backup; 1400 boolean_t stalewriteverf = FALSE; 1401 1402 nfsstats.rpccnt[NFSPROC_WRITE]++; 1403 len = min(tsiz, nmp->nm_wsize); 1404 datalen = pageprotected ? 0 : nfsm_rndup(len); 1405 nfsm_reqhead(np, NFSPROC_WRITE, 1406 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1407 nfsm_fhtom(np, v3); 1408 #ifndef NFS_V2_ONLY 1409 if (v3) { 1410 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1411 txdr_hyper(uiop->uio_offset, tl); 1412 tl += 2; 1413 *tl++ = txdr_unsigned(len); 1414 *tl++ = txdr_unsigned(*iomode); 1415 *tl = txdr_unsigned(len); 1416 } else 1417 #endif 1418 { 1419 u_int32_t x; 1420 1421 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1422 /* Set both "begin" and "current" to non-garbage. */ 1423 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1424 *tl++ = x; /* "begin offset" */ 1425 *tl++ = x; /* "current offset" */ 1426 x = txdr_unsigned(len); 1427 *tl++ = x; /* total to this offset */ 1428 *tl = x; /* size of this write */ 1429 1430 } 1431 if (pageprotected) { 1432 /* 1433 * since we know pages can't be modified during i/o, 1434 * no need to copy them for us. 1435 */ 1436 struct mbuf *m; 1437 struct iovec *iovp = uiop->uio_iov; 1438 1439 m = m_get(M_WAIT, MT_DATA); 1440 MCLAIM(m, &nfs_mowner); 1441 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1442 nfs_writerpc_extfree, &ctx); 1443 m->m_flags |= M_EXT_ROMAP; 1444 m->m_len = len; 1445 mb->m_next = m; 1446 /* 1447 * no need to maintain mb and bpos here 1448 * because no one care them later. 1449 */ 1450 #if 0 1451 mb = m; 1452 bpos = mtod(caddr_t, mb) + mb->m_len; 1453 #endif 1454 iovp->iov_base = (char *)iovp->iov_base + len; 1455 iovp->iov_len -= len; 1456 uiop->uio_offset += len; 1457 uiop->uio_resid -= len; 1458 s = splvm(); 1459 simple_lock(&ctx.nwc_slock); 1460 ctx.nwc_mbufcount++; 1461 simple_unlock(&ctx.nwc_slock); 1462 splx(s); 1463 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1464 } else { 1465 nfsm_uiotom(uiop, len); 1466 } 1467 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1468 #ifndef NFS_V2_ONLY 1469 if (v3) { 1470 wccflag = NFSV3_WCCCHK; 1471 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1472 if (!error) { 1473 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1474 + NFSX_V3WRITEVERF); 1475 rlen = fxdr_unsigned(int, *tl++); 1476 if (rlen == 0) { 1477 error = NFSERR_IO; 1478 m_freem(mrep); 1479 break; 1480 } else if (rlen < len) { 1481 backup = len - rlen; 1482 uiop->uio_iov->iov_base = 1483 (caddr_t)uiop->uio_iov->iov_base - 1484 backup; 1485 uiop->uio_iov->iov_len += backup; 1486 uiop->uio_offset -= backup; 1487 uiop->uio_resid += backup; 1488 len = rlen; 1489 } 1490 commit = fxdr_unsigned(int, *tl++); 1491 1492 /* 1493 * Return the lowest committment level 1494 * obtained by any of the RPCs. 1495 */ 1496 if (committed == NFSV3WRITE_FILESYNC) 1497 committed = commit; 1498 else if (committed == NFSV3WRITE_DATASYNC && 1499 commit == NFSV3WRITE_UNSTABLE) 1500 committed = commit; 1501 simple_lock(&nmp->nm_slock); 1502 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1503 memcpy(nmp->nm_writeverf, tl, 1504 NFSX_V3WRITEVERF); 1505 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1506 } else if ((nmp->nm_iflag & 1507 NFSMNT_STALEWRITEVERF) || 1508 memcmp(tl, nmp->nm_writeverf, 1509 NFSX_V3WRITEVERF)) { 1510 memcpy(nmp->nm_writeverf, tl, 1511 NFSX_V3WRITEVERF); 1512 /* 1513 * note NFSMNT_STALEWRITEVERF 1514 * if we're the first thread to 1515 * notice it. 1516 */ 1517 if ((nmp->nm_iflag & 1518 NFSMNT_STALEWRITEVERF) == 0) { 1519 stalewriteverf = TRUE; 1520 nmp->nm_iflag |= 1521 NFSMNT_STALEWRITEVERF; 1522 } 1523 } 1524 simple_unlock(&nmp->nm_slock); 1525 } 1526 } else 1527 #endif 1528 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1529 if (wccflag) 1530 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1531 m_freem(mrep); 1532 if (error) 1533 break; 1534 tsiz -= len; 1535 if (stalewriteverf) { 1536 *stalewriteverfp = TRUE; 1537 stalewriteverf = FALSE; 1538 if (committed == NFSV3WRITE_UNSTABLE && 1539 len != origresid) { 1540 /* 1541 * if our write requests weren't atomic but 1542 * unstable, datas in previous iterations 1543 * might have already been lost now. 1544 * then, we should resend them to nfsd. 1545 */ 1546 backup = origresid - tsiz; 1547 uiop->uio_iov->iov_base = 1548 (caddr_t)uiop->uio_iov->iov_base - backup; 1549 uiop->uio_iov->iov_len += backup; 1550 uiop->uio_offset -= backup; 1551 uiop->uio_resid += backup; 1552 tsiz = origresid; 1553 goto retry; 1554 } 1555 } 1556 } 1557 if (pageprotected) { 1558 /* 1559 * wait until mbufs go away. 1560 * retransmitted mbufs can survive longer than rpc requests 1561 * themselves. 1562 */ 1563 s = splvm(); 1564 simple_lock(&ctx.nwc_slock); 1565 ctx.nwc_mbufcount--; 1566 while (ctx.nwc_mbufcount > 0) { 1567 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1568 } 1569 simple_unlock(&ctx.nwc_slock); 1570 splx(s); 1571 PRELE(l); 1572 } 1573 nfsmout: 1574 *iomode = committed; 1575 if (error) 1576 uiop->uio_resid = tsiz; 1577 return (error); 1578 } 1579 1580 /* 1581 * nfs mknod rpc 1582 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1583 * mode set to specify the file type and the size field for rdev. 1584 */ 1585 int 1586 nfs_mknodrpc(dvp, vpp, cnp, vap) 1587 struct vnode *dvp; 1588 struct vnode **vpp; 1589 struct componentname *cnp; 1590 struct vattr *vap; 1591 { 1592 struct nfsv2_sattr *sp; 1593 u_int32_t *tl; 1594 caddr_t cp; 1595 int32_t t1, t2; 1596 struct vnode *newvp = (struct vnode *)0; 1597 struct nfsnode *dnp, *np; 1598 char *cp2; 1599 caddr_t bpos, dpos; 1600 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1601 struct mbuf *mreq, *mrep, *md, *mb; 1602 u_int32_t rdev; 1603 const int v3 = NFS_ISV3(dvp); 1604 1605 if (vap->va_type == VCHR || vap->va_type == VBLK) 1606 rdev = txdr_unsigned(vap->va_rdev); 1607 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1608 rdev = nfs_xdrneg1; 1609 else { 1610 VOP_ABORTOP(dvp, cnp); 1611 vput(dvp); 1612 return (EOPNOTSUPP); 1613 } 1614 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1615 dnp = VTONFS(dvp); 1616 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1617 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1618 nfsm_fhtom(dnp, v3); 1619 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1620 #ifndef NFS_V2_ONLY 1621 if (v3) { 1622 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1623 *tl++ = vtonfsv3_type(vap->va_type); 1624 nfsm_v3attrbuild(vap, FALSE); 1625 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1626 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1627 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1628 *tl = txdr_unsigned(minor(vap->va_rdev)); 1629 } 1630 } else 1631 #endif 1632 { 1633 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1634 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1635 sp->sa_uid = nfs_xdrneg1; 1636 sp->sa_gid = nfs_xdrneg1; 1637 sp->sa_size = rdev; 1638 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1639 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1640 } 1641 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1642 if (!error) { 1643 nfsm_mtofh(dvp, newvp, v3, gotvp); 1644 if (!gotvp) { 1645 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1646 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1647 if (!error) 1648 newvp = NFSTOV(np); 1649 } 1650 } 1651 #ifndef NFS_V2_ONLY 1652 if (v3) 1653 nfsm_wcc_data(dvp, wccflag, 0); 1654 #endif 1655 nfsm_reqdone; 1656 if (error) { 1657 if (newvp) 1658 vput(newvp); 1659 } else { 1660 if (cnp->cn_flags & MAKEENTRY) 1661 nfs_cache_enter(dvp, newvp, cnp); 1662 *vpp = newvp; 1663 } 1664 PNBUF_PUT(cnp->cn_pnbuf); 1665 VTONFS(dvp)->n_flag |= NMODIFIED; 1666 if (!wccflag) 1667 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1668 vput(dvp); 1669 return (error); 1670 } 1671 1672 /* 1673 * nfs mknod vop 1674 * just call nfs_mknodrpc() to do the work. 1675 */ 1676 /* ARGSUSED */ 1677 int 1678 nfs_mknod(v) 1679 void *v; 1680 { 1681 struct vop_mknod_args /* { 1682 struct vnode *a_dvp; 1683 struct vnode **a_vpp; 1684 struct componentname *a_cnp; 1685 struct vattr *a_vap; 1686 } */ *ap = v; 1687 int error; 1688 1689 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1690 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1691 return (error); 1692 } 1693 1694 #ifndef NFS_V2_ONLY 1695 static u_long create_verf; 1696 #endif 1697 /* 1698 * nfs file create call 1699 */ 1700 int 1701 nfs_create(v) 1702 void *v; 1703 { 1704 struct vop_create_args /* { 1705 struct vnode *a_dvp; 1706 struct vnode **a_vpp; 1707 struct componentname *a_cnp; 1708 struct vattr *a_vap; 1709 } */ *ap = v; 1710 struct vnode *dvp = ap->a_dvp; 1711 struct vattr *vap = ap->a_vap; 1712 struct componentname *cnp = ap->a_cnp; 1713 struct nfsv2_sattr *sp; 1714 u_int32_t *tl; 1715 caddr_t cp; 1716 int32_t t1, t2; 1717 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1718 struct vnode *newvp = (struct vnode *)0; 1719 caddr_t bpos, dpos, cp2; 1720 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1721 struct mbuf *mreq, *mrep, *md, *mb; 1722 const int v3 = NFS_ISV3(dvp); 1723 1724 /* 1725 * Oops, not for me.. 1726 */ 1727 if (vap->va_type == VSOCK) 1728 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1729 1730 #ifdef VA_EXCLUSIVE 1731 if (vap->va_vaflags & VA_EXCLUSIVE) 1732 fmode |= O_EXCL; 1733 #endif 1734 again: 1735 error = 0; 1736 nfsstats.rpccnt[NFSPROC_CREATE]++; 1737 dnp = VTONFS(dvp); 1738 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1739 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1740 nfsm_fhtom(dnp, v3); 1741 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1742 #ifndef NFS_V2_ONLY 1743 if (v3) { 1744 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1745 if (fmode & O_EXCL) { 1746 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1747 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1748 #ifdef INET 1749 if (TAILQ_FIRST(&in_ifaddr)) 1750 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1751 else 1752 *tl++ = create_verf; 1753 #else 1754 *tl++ = create_verf; 1755 #endif 1756 *tl = ++create_verf; 1757 } else { 1758 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1759 nfsm_v3attrbuild(vap, FALSE); 1760 } 1761 } else 1762 #endif 1763 { 1764 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1765 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1766 sp->sa_uid = nfs_xdrneg1; 1767 sp->sa_gid = nfs_xdrneg1; 1768 sp->sa_size = 0; 1769 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1770 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1771 } 1772 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1773 if (!error) { 1774 nfsm_mtofh(dvp, newvp, v3, gotvp); 1775 if (!gotvp) { 1776 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1777 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1778 if (!error) 1779 newvp = NFSTOV(np); 1780 } 1781 } 1782 #ifndef NFS_V2_ONLY 1783 if (v3) 1784 nfsm_wcc_data(dvp, wccflag, 0); 1785 #endif 1786 nfsm_reqdone; 1787 if (error) { 1788 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1789 fmode &= ~O_EXCL; 1790 goto again; 1791 } 1792 if (newvp) 1793 vput(newvp); 1794 } else if (v3 && (fmode & O_EXCL)) 1795 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1796 if (!error) { 1797 if (cnp->cn_flags & MAKEENTRY) 1798 nfs_cache_enter(dvp, newvp, cnp); 1799 *ap->a_vpp = newvp; 1800 } 1801 PNBUF_PUT(cnp->cn_pnbuf); 1802 VTONFS(dvp)->n_flag |= NMODIFIED; 1803 if (!wccflag) 1804 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1805 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1806 vput(dvp); 1807 return (error); 1808 } 1809 1810 /* 1811 * nfs file remove call 1812 * To try and make nfs semantics closer to ufs semantics, a file that has 1813 * other processes using the vnode is renamed instead of removed and then 1814 * removed later on the last close. 1815 * - If v_usecount > 1 1816 * If a rename is not already in the works 1817 * call nfs_sillyrename() to set it up 1818 * else 1819 * do the remove rpc 1820 */ 1821 int 1822 nfs_remove(v) 1823 void *v; 1824 { 1825 struct vop_remove_args /* { 1826 struct vnodeop_desc *a_desc; 1827 struct vnode * a_dvp; 1828 struct vnode * a_vp; 1829 struct componentname * a_cnp; 1830 } */ *ap = v; 1831 struct vnode *vp = ap->a_vp; 1832 struct vnode *dvp = ap->a_dvp; 1833 struct componentname *cnp = ap->a_cnp; 1834 struct nfsnode *np = VTONFS(vp); 1835 int error = 0; 1836 struct vattr vattr; 1837 1838 #ifndef DIAGNOSTIC 1839 if ((cnp->cn_flags & HASBUF) == 0) 1840 panic("nfs_remove: no name"); 1841 if (vp->v_usecount < 1) 1842 panic("nfs_remove: bad v_usecount"); 1843 #endif 1844 if (vp->v_type == VDIR) 1845 error = EPERM; 1846 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1847 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1848 vattr.va_nlink > 1)) { 1849 /* 1850 * Purge the name cache so that the chance of a lookup for 1851 * the name succeeding while the remove is in progress is 1852 * minimized. Without node locking it can still happen, such 1853 * that an I/O op returns ESTALE, but since you get this if 1854 * another host removes the file.. 1855 */ 1856 cache_purge(vp); 1857 /* 1858 * throw away biocache buffers, mainly to avoid 1859 * unnecessary delayed writes later. 1860 */ 1861 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1862 /* Do the rpc */ 1863 if (error != EINTR) 1864 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1865 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1866 } else if (!np->n_sillyrename) 1867 error = nfs_sillyrename(dvp, vp, cnp); 1868 PNBUF_PUT(cnp->cn_pnbuf); 1869 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1870 vattr.va_nlink == 1) { 1871 np->n_flag |= NREMOVED; 1872 } 1873 NFS_INVALIDATE_ATTRCACHE(np); 1874 VN_KNOTE(vp, NOTE_DELETE); 1875 VN_KNOTE(dvp, NOTE_WRITE); 1876 if (dvp == vp) 1877 vrele(vp); 1878 else 1879 vput(vp); 1880 vput(dvp); 1881 return (error); 1882 } 1883 1884 /* 1885 * nfs file remove rpc called from nfs_inactive 1886 */ 1887 int 1888 nfs_removeit(sp) 1889 struct sillyrename *sp; 1890 { 1891 1892 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1893 (struct proc *)0)); 1894 } 1895 1896 /* 1897 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1898 */ 1899 int 1900 nfs_removerpc(dvp, name, namelen, cred, proc) 1901 struct vnode *dvp; 1902 const char *name; 1903 int namelen; 1904 struct ucred *cred; 1905 struct proc *proc; 1906 { 1907 u_int32_t *tl; 1908 caddr_t cp; 1909 #ifndef NFS_V2_ONLY 1910 int32_t t1; 1911 caddr_t cp2; 1912 #endif 1913 int32_t t2; 1914 caddr_t bpos, dpos; 1915 int error = 0, wccflag = NFSV3_WCCRATTR; 1916 struct mbuf *mreq, *mrep, *md, *mb; 1917 const int v3 = NFS_ISV3(dvp); 1918 int rexmit; 1919 struct nfsnode *dnp = VTONFS(dvp); 1920 1921 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1922 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1923 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1924 nfsm_fhtom(dnp, v3); 1925 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1926 nfsm_request1(dnp, NFSPROC_REMOVE, proc, cred, &rexmit); 1927 #ifndef NFS_V2_ONLY 1928 if (v3) 1929 nfsm_wcc_data(dvp, wccflag, 0); 1930 #endif 1931 nfsm_reqdone; 1932 VTONFS(dvp)->n_flag |= NMODIFIED; 1933 if (!wccflag) 1934 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1935 /* 1936 * Kludge City: If the first reply to the remove rpc is lost.. 1937 * the reply to the retransmitted request will be ENOENT 1938 * since the file was in fact removed 1939 * Therefore, we cheat and return success. 1940 */ 1941 if (rexmit && error == ENOENT) 1942 error = 0; 1943 return (error); 1944 } 1945 1946 /* 1947 * nfs file rename call 1948 */ 1949 int 1950 nfs_rename(v) 1951 void *v; 1952 { 1953 struct vop_rename_args /* { 1954 struct vnode *a_fdvp; 1955 struct vnode *a_fvp; 1956 struct componentname *a_fcnp; 1957 struct vnode *a_tdvp; 1958 struct vnode *a_tvp; 1959 struct componentname *a_tcnp; 1960 } */ *ap = v; 1961 struct vnode *fvp = ap->a_fvp; 1962 struct vnode *tvp = ap->a_tvp; 1963 struct vnode *fdvp = ap->a_fdvp; 1964 struct vnode *tdvp = ap->a_tdvp; 1965 struct componentname *tcnp = ap->a_tcnp; 1966 struct componentname *fcnp = ap->a_fcnp; 1967 int error; 1968 1969 #ifndef DIAGNOSTIC 1970 if ((tcnp->cn_flags & HASBUF) == 0 || 1971 (fcnp->cn_flags & HASBUF) == 0) 1972 panic("nfs_rename: no name"); 1973 #endif 1974 /* Check for cross-device rename */ 1975 if ((fvp->v_mount != tdvp->v_mount) || 1976 (tvp && (fvp->v_mount != tvp->v_mount))) { 1977 error = EXDEV; 1978 goto out; 1979 } 1980 1981 /* 1982 * If the tvp exists and is in use, sillyrename it before doing the 1983 * rename of the new file over it. 1984 */ 1985 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1986 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1987 VN_KNOTE(tvp, NOTE_DELETE); 1988 vput(tvp); 1989 tvp = NULL; 1990 } 1991 1992 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1993 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1994 tcnp->cn_proc); 1995 1996 VN_KNOTE(fdvp, NOTE_WRITE); 1997 VN_KNOTE(tdvp, NOTE_WRITE); 1998 if (fvp->v_type == VDIR) { 1999 if (tvp != NULL && tvp->v_type == VDIR) 2000 cache_purge(tdvp); 2001 cache_purge(fdvp); 2002 } 2003 out: 2004 if (tdvp == tvp) 2005 vrele(tdvp); 2006 else 2007 vput(tdvp); 2008 if (tvp) 2009 vput(tvp); 2010 vrele(fdvp); 2011 vrele(fvp); 2012 return (error); 2013 } 2014 2015 /* 2016 * nfs file rename rpc called from nfs_remove() above 2017 */ 2018 int 2019 nfs_renameit(sdvp, scnp, sp) 2020 struct vnode *sdvp; 2021 struct componentname *scnp; 2022 struct sillyrename *sp; 2023 { 2024 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2025 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 2026 } 2027 2028 /* 2029 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2030 */ 2031 int 2032 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 2033 struct vnode *fdvp; 2034 const char *fnameptr; 2035 int fnamelen; 2036 struct vnode *tdvp; 2037 const char *tnameptr; 2038 int tnamelen; 2039 struct ucred *cred; 2040 struct proc *proc; 2041 { 2042 u_int32_t *tl; 2043 caddr_t cp; 2044 #ifndef NFS_V2_ONLY 2045 int32_t t1; 2046 caddr_t cp2; 2047 #endif 2048 int32_t t2; 2049 caddr_t bpos, dpos; 2050 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2051 struct mbuf *mreq, *mrep, *md, *mb; 2052 const int v3 = NFS_ISV3(fdvp); 2053 int rexmit; 2054 struct nfsnode *fdnp = VTONFS(fdvp); 2055 2056 nfsstats.rpccnt[NFSPROC_RENAME]++; 2057 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2058 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2059 nfsm_rndup(tnamelen)); 2060 nfsm_fhtom(fdnp, v3); 2061 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2062 nfsm_fhtom(VTONFS(tdvp), v3); 2063 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2064 nfsm_request1(fdnp, NFSPROC_RENAME, proc, cred, &rexmit); 2065 #ifndef NFS_V2_ONLY 2066 if (v3) { 2067 nfsm_wcc_data(fdvp, fwccflag, 0); 2068 nfsm_wcc_data(tdvp, twccflag, 0); 2069 } 2070 #endif 2071 nfsm_reqdone; 2072 VTONFS(fdvp)->n_flag |= NMODIFIED; 2073 VTONFS(tdvp)->n_flag |= NMODIFIED; 2074 if (!fwccflag) 2075 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2076 if (!twccflag) 2077 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2078 /* 2079 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2080 */ 2081 if (rexmit && error == ENOENT) 2082 error = 0; 2083 return (error); 2084 } 2085 2086 /* 2087 * nfs hard link create call 2088 */ 2089 int 2090 nfs_link(v) 2091 void *v; 2092 { 2093 struct vop_link_args /* { 2094 struct vnode *a_dvp; 2095 struct vnode *a_vp; 2096 struct componentname *a_cnp; 2097 } */ *ap = v; 2098 struct vnode *vp = ap->a_vp; 2099 struct vnode *dvp = ap->a_dvp; 2100 struct componentname *cnp = ap->a_cnp; 2101 u_int32_t *tl; 2102 caddr_t cp; 2103 #ifndef NFS_V2_ONLY 2104 int32_t t1; 2105 caddr_t cp2; 2106 #endif 2107 int32_t t2; 2108 caddr_t bpos, dpos; 2109 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2110 struct mbuf *mreq, *mrep, *md, *mb; 2111 /* XXX Should be const and initialised? */ 2112 int v3; 2113 int rexmit; 2114 struct nfsnode *np; 2115 2116 if (dvp->v_mount != vp->v_mount) { 2117 VOP_ABORTOP(dvp, cnp); 2118 vput(dvp); 2119 return (EXDEV); 2120 } 2121 if (dvp != vp) { 2122 error = vn_lock(vp, LK_EXCLUSIVE); 2123 if (error != 0) { 2124 VOP_ABORTOP(dvp, cnp); 2125 vput(dvp); 2126 return error; 2127 } 2128 } 2129 2130 /* 2131 * Push all writes to the server, so that the attribute cache 2132 * doesn't get "out of sync" with the server. 2133 * XXX There should be a better way! 2134 */ 2135 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2136 2137 v3 = NFS_ISV3(vp); 2138 nfsstats.rpccnt[NFSPROC_LINK]++; 2139 np = VTONFS(vp); 2140 nfsm_reqhead(np, NFSPROC_LINK, 2141 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2142 nfsm_fhtom(np, v3); 2143 nfsm_fhtom(VTONFS(dvp), v3); 2144 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2145 nfsm_request1(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred, &rexmit); 2146 #ifndef NFS_V2_ONLY 2147 if (v3) { 2148 nfsm_postop_attr(vp, attrflag, 0); 2149 nfsm_wcc_data(dvp, wccflag, 0); 2150 } 2151 #endif 2152 nfsm_reqdone; 2153 PNBUF_PUT(cnp->cn_pnbuf); 2154 VTONFS(dvp)->n_flag |= NMODIFIED; 2155 if (!attrflag) 2156 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2157 if (!wccflag) 2158 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2159 if (dvp != vp) 2160 VOP_UNLOCK(vp, 0); 2161 VN_KNOTE(vp, NOTE_LINK); 2162 VN_KNOTE(dvp, NOTE_WRITE); 2163 vput(dvp); 2164 /* 2165 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2166 */ 2167 if (rexmit && error == EEXIST) 2168 error = 0; 2169 return (error); 2170 } 2171 2172 /* 2173 * nfs symbolic link create call 2174 */ 2175 int 2176 nfs_symlink(v) 2177 void *v; 2178 { 2179 struct vop_symlink_args /* { 2180 struct vnode *a_dvp; 2181 struct vnode **a_vpp; 2182 struct componentname *a_cnp; 2183 struct vattr *a_vap; 2184 char *a_target; 2185 } */ *ap = v; 2186 struct vnode *dvp = ap->a_dvp; 2187 struct vattr *vap = ap->a_vap; 2188 struct componentname *cnp = ap->a_cnp; 2189 struct nfsv2_sattr *sp; 2190 u_int32_t *tl; 2191 caddr_t cp; 2192 int32_t t1, t2; 2193 caddr_t bpos, dpos, cp2; 2194 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2195 struct mbuf *mreq, *mrep, *md, *mb; 2196 struct vnode *newvp = (struct vnode *)0; 2197 const int v3 = NFS_ISV3(dvp); 2198 int rexmit; 2199 struct nfsnode *dnp = VTONFS(dvp); 2200 2201 *ap->a_vpp = NULL; 2202 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2203 slen = strlen(ap->a_target); 2204 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2205 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2206 nfsm_fhtom(dnp, v3); 2207 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2208 #ifndef NFS_V2_ONlY 2209 if (v3) 2210 nfsm_v3attrbuild(vap, FALSE); 2211 #endif 2212 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2213 #ifndef NFS_V2_ONlY 2214 if (!v3) { 2215 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2216 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2217 sp->sa_uid = nfs_xdrneg1; 2218 sp->sa_gid = nfs_xdrneg1; 2219 sp->sa_size = nfs_xdrneg1; 2220 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2221 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2222 } 2223 #endif 2224 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred, 2225 &rexmit); 2226 #ifndef NFS_V2_ONlY 2227 if (v3) { 2228 if (!error) 2229 nfsm_mtofh(dvp, newvp, v3, gotvp); 2230 nfsm_wcc_data(dvp, wccflag, 0); 2231 } 2232 #endif 2233 nfsm_reqdone; 2234 /* 2235 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2236 */ 2237 if (rexmit && error == EEXIST) 2238 error = 0; 2239 if (error == 0 && newvp == NULL) { 2240 struct nfsnode *np = NULL; 2241 2242 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2243 cnp->cn_cred, cnp->cn_proc, &np); 2244 if (error == 0) 2245 newvp = NFSTOV(np); 2246 } 2247 if (error) { 2248 if (newvp != NULL) 2249 vput(newvp); 2250 } else { 2251 *ap->a_vpp = newvp; 2252 } 2253 PNBUF_PUT(cnp->cn_pnbuf); 2254 VTONFS(dvp)->n_flag |= NMODIFIED; 2255 if (!wccflag) 2256 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2257 VN_KNOTE(dvp, NOTE_WRITE); 2258 vput(dvp); 2259 return (error); 2260 } 2261 2262 /* 2263 * nfs make dir call 2264 */ 2265 int 2266 nfs_mkdir(v) 2267 void *v; 2268 { 2269 struct vop_mkdir_args /* { 2270 struct vnode *a_dvp; 2271 struct vnode **a_vpp; 2272 struct componentname *a_cnp; 2273 struct vattr *a_vap; 2274 } */ *ap = v; 2275 struct vnode *dvp = ap->a_dvp; 2276 struct vattr *vap = ap->a_vap; 2277 struct componentname *cnp = ap->a_cnp; 2278 struct nfsv2_sattr *sp; 2279 u_int32_t *tl; 2280 caddr_t cp; 2281 int32_t t1, t2; 2282 int len; 2283 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2284 struct vnode *newvp = (struct vnode *)0; 2285 caddr_t bpos, dpos, cp2; 2286 int error = 0, wccflag = NFSV3_WCCRATTR; 2287 int gotvp = 0; 2288 int rexmit; 2289 struct mbuf *mreq, *mrep, *md, *mb; 2290 const int v3 = NFS_ISV3(dvp); 2291 2292 len = cnp->cn_namelen; 2293 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2294 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2295 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2296 nfsm_fhtom(dnp, v3); 2297 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2298 #ifndef NFS_V2_ONLY 2299 if (v3) { 2300 nfsm_v3attrbuild(vap, FALSE); 2301 } else 2302 #endif 2303 { 2304 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2305 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2306 sp->sa_uid = nfs_xdrneg1; 2307 sp->sa_gid = nfs_xdrneg1; 2308 sp->sa_size = nfs_xdrneg1; 2309 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2310 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2311 } 2312 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2313 if (!error) 2314 nfsm_mtofh(dvp, newvp, v3, gotvp); 2315 if (v3) 2316 nfsm_wcc_data(dvp, wccflag, 0); 2317 nfsm_reqdone; 2318 VTONFS(dvp)->n_flag |= NMODIFIED; 2319 if (!wccflag) 2320 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2321 /* 2322 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2323 * if we can succeed in looking up the directory. 2324 */ 2325 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2326 if (newvp) { 2327 vput(newvp); 2328 newvp = (struct vnode *)0; 2329 } 2330 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2331 cnp->cn_proc, &np); 2332 if (!error) { 2333 newvp = NFSTOV(np); 2334 if (newvp->v_type != VDIR || newvp == dvp) 2335 error = EEXIST; 2336 } 2337 } 2338 if (error) { 2339 if (newvp) { 2340 if (dvp != newvp) 2341 vput(newvp); 2342 else 2343 vrele(newvp); 2344 } 2345 } else { 2346 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2347 if (cnp->cn_flags & MAKEENTRY) 2348 nfs_cache_enter(dvp, newvp, cnp); 2349 *ap->a_vpp = newvp; 2350 } 2351 PNBUF_PUT(cnp->cn_pnbuf); 2352 vput(dvp); 2353 return (error); 2354 } 2355 2356 /* 2357 * nfs remove directory call 2358 */ 2359 int 2360 nfs_rmdir(v) 2361 void *v; 2362 { 2363 struct vop_rmdir_args /* { 2364 struct vnode *a_dvp; 2365 struct vnode *a_vp; 2366 struct componentname *a_cnp; 2367 } */ *ap = v; 2368 struct vnode *vp = ap->a_vp; 2369 struct vnode *dvp = ap->a_dvp; 2370 struct componentname *cnp = ap->a_cnp; 2371 u_int32_t *tl; 2372 caddr_t cp; 2373 #ifndef NFS_V2_ONLY 2374 int32_t t1; 2375 caddr_t cp2; 2376 #endif 2377 int32_t t2; 2378 caddr_t bpos, dpos; 2379 int error = 0, wccflag = NFSV3_WCCRATTR; 2380 int rexmit; 2381 struct mbuf *mreq, *mrep, *md, *mb; 2382 const int v3 = NFS_ISV3(dvp); 2383 struct nfsnode *dnp; 2384 2385 if (dvp == vp) { 2386 vrele(dvp); 2387 vput(dvp); 2388 PNBUF_PUT(cnp->cn_pnbuf); 2389 return (EINVAL); 2390 } 2391 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2392 dnp = VTONFS(dvp); 2393 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2394 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2395 nfsm_fhtom(dnp, v3); 2396 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2397 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2398 #ifndef NFS_V2_ONLY 2399 if (v3) 2400 nfsm_wcc_data(dvp, wccflag, 0); 2401 #endif 2402 nfsm_reqdone; 2403 PNBUF_PUT(cnp->cn_pnbuf); 2404 VTONFS(dvp)->n_flag |= NMODIFIED; 2405 if (!wccflag) 2406 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2407 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2408 VN_KNOTE(vp, NOTE_DELETE); 2409 cache_purge(vp); 2410 vput(vp); 2411 vput(dvp); 2412 /* 2413 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2414 */ 2415 if (rexmit && error == ENOENT) 2416 error = 0; 2417 return (error); 2418 } 2419 2420 /* 2421 * nfs readdir call 2422 */ 2423 int 2424 nfs_readdir(v) 2425 void *v; 2426 { 2427 struct vop_readdir_args /* { 2428 struct vnode *a_vp; 2429 struct uio *a_uio; 2430 struct ucred *a_cred; 2431 int *a_eofflag; 2432 off_t **a_cookies; 2433 int *a_ncookies; 2434 } */ *ap = v; 2435 struct vnode *vp = ap->a_vp; 2436 struct uio *uio = ap->a_uio; 2437 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2438 char *base = uio->uio_iov->iov_base; 2439 int tresid, error; 2440 size_t count, lost; 2441 struct dirent *dp; 2442 off_t *cookies = NULL; 2443 int ncookies = 0, nc; 2444 2445 if (vp->v_type != VDIR) 2446 return (EPERM); 2447 2448 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2449 count = uio->uio_resid - lost; 2450 if (count <= 0) 2451 return (EINVAL); 2452 2453 /* 2454 * Call nfs_bioread() to do the real work. 2455 */ 2456 tresid = uio->uio_resid = count; 2457 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2458 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2459 2460 if (!error && ap->a_cookies) { 2461 ncookies = count / 16; 2462 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2463 *ap->a_cookies = cookies; 2464 } 2465 2466 if (!error && uio->uio_resid == tresid) { 2467 uio->uio_resid += lost; 2468 nfsstats.direofcache_misses++; 2469 if (ap->a_cookies) 2470 *ap->a_ncookies = 0; 2471 *ap->a_eofflag = 1; 2472 return (0); 2473 } 2474 2475 if (!error && ap->a_cookies) { 2476 /* 2477 * Only the NFS server and emulations use cookies, and they 2478 * load the directory block into system space, so we can 2479 * just look at it directly. 2480 */ 2481 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2482 panic("nfs_readdir: lost in space"); 2483 for (nc = 0; ncookies-- && 2484 base < (char *)uio->uio_iov->iov_base; nc++){ 2485 dp = (struct dirent *) base; 2486 if (dp->d_reclen == 0) 2487 break; 2488 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2489 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2490 else 2491 *(cookies++) = NFS_GETCOOKIE(dp); 2492 base += dp->d_reclen; 2493 } 2494 uio->uio_resid += 2495 ((caddr_t)uio->uio_iov->iov_base - base); 2496 uio->uio_iov->iov_len += 2497 ((caddr_t)uio->uio_iov->iov_base - base); 2498 uio->uio_iov->iov_base = base; 2499 *ap->a_ncookies = nc; 2500 } 2501 2502 uio->uio_resid += lost; 2503 *ap->a_eofflag = 0; 2504 return (error); 2505 } 2506 2507 /* 2508 * Readdir rpc call. 2509 * Called from below the buffer cache by nfs_doio(). 2510 */ 2511 int 2512 nfs_readdirrpc(vp, uiop, cred) 2513 struct vnode *vp; 2514 struct uio *uiop; 2515 struct ucred *cred; 2516 { 2517 int len, left; 2518 struct dirent *dp = NULL; 2519 u_int32_t *tl; 2520 caddr_t cp; 2521 int32_t t1, t2; 2522 caddr_t bpos, dpos, cp2; 2523 struct mbuf *mreq, *mrep, *md, *mb; 2524 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2525 struct nfsnode *dnp = VTONFS(vp); 2526 u_quad_t fileno; 2527 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2528 #ifndef NFS_V2_ONLY 2529 int attrflag; 2530 #endif 2531 int nrpcs = 0, reclen; 2532 const int v3 = NFS_ISV3(vp); 2533 2534 #ifdef DIAGNOSTIC 2535 /* 2536 * Should be called from buffer cache, so only amount of 2537 * NFS_DIRBLKSIZ will be requested. 2538 */ 2539 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2540 panic("nfs readdirrpc bad uio"); 2541 #endif 2542 2543 /* 2544 * Loop around doing readdir rpc's of size nm_readdirsize 2545 * truncated to a multiple of NFS_DIRFRAGSIZ. 2546 * The stopping criteria is EOF or buffer full. 2547 */ 2548 while (more_dirs && bigenough) { 2549 /* 2550 * Heuristic: don't bother to do another RPC to further 2551 * fill up this block if there is not much room left. (< 50% 2552 * of the readdir RPC size). This wastes some buffer space 2553 * but can save up to 50% in RPC calls. 2554 */ 2555 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2556 bigenough = 0; 2557 break; 2558 } 2559 nfsstats.rpccnt[NFSPROC_READDIR]++; 2560 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2561 NFSX_READDIR(v3)); 2562 nfsm_fhtom(dnp, v3); 2563 #ifndef NFS_V2_ONLY 2564 if (v3) { 2565 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2566 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2567 txdr_swapcookie3(uiop->uio_offset, tl); 2568 } else { 2569 txdr_cookie3(uiop->uio_offset, tl); 2570 } 2571 tl += 2; 2572 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2573 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2574 } else 2575 #endif 2576 { 2577 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2578 *tl++ = txdr_unsigned(uiop->uio_offset); 2579 } 2580 *tl = txdr_unsigned(nmp->nm_readdirsize); 2581 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2582 nrpcs++; 2583 #ifndef NFS_V2_ONLY 2584 if (v3) { 2585 nfsm_postop_attr(vp, attrflag, 0); 2586 if (!error) { 2587 nfsm_dissect(tl, u_int32_t *, 2588 2 * NFSX_UNSIGNED); 2589 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2590 dnp->n_cookieverf.nfsuquad[1] = *tl; 2591 } else { 2592 m_freem(mrep); 2593 goto nfsmout; 2594 } 2595 } 2596 #endif 2597 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2598 more_dirs = fxdr_unsigned(int, *tl); 2599 2600 /* loop thru the dir entries, doctoring them to 4bsd form */ 2601 while (more_dirs && bigenough) { 2602 #ifndef NFS_V2_ONLY 2603 if (v3) { 2604 nfsm_dissect(tl, u_int32_t *, 2605 3 * NFSX_UNSIGNED); 2606 fileno = fxdr_hyper(tl); 2607 len = fxdr_unsigned(int, *(tl + 2)); 2608 } else 2609 #endif 2610 { 2611 nfsm_dissect(tl, u_int32_t *, 2612 2 * NFSX_UNSIGNED); 2613 fileno = fxdr_unsigned(u_quad_t, *tl++); 2614 len = fxdr_unsigned(int, *tl); 2615 } 2616 if (len <= 0 || len > NFS_MAXNAMLEN) { 2617 error = EBADRPC; 2618 m_freem(mrep); 2619 goto nfsmout; 2620 } 2621 tlen = nfsm_rndup(len); 2622 if (tlen == len) 2623 tlen += 4; /* To ensure null termination */ 2624 tlen += sizeof (off_t) + sizeof (int); 2625 reclen = ALIGN(tlen + DIRHDSIZ); 2626 tlen = reclen - DIRHDSIZ; 2627 left = NFS_DIRFRAGSIZ - blksiz; 2628 if (reclen > left) { 2629 dp->d_reclen += left; 2630 uiop->uio_iov->iov_base = 2631 (caddr_t)uiop->uio_iov->iov_base + left; 2632 uiop->uio_iov->iov_len -= left; 2633 uiop->uio_resid -= left; 2634 blksiz = 0; 2635 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2636 } 2637 if (reclen > uiop->uio_resid) 2638 bigenough = 0; 2639 if (bigenough) { 2640 dp = (struct dirent *)uiop->uio_iov->iov_base; 2641 dp->d_fileno = (int)fileno; 2642 dp->d_namlen = len; 2643 dp->d_reclen = reclen; 2644 dp->d_type = DT_UNKNOWN; 2645 blksiz += dp->d_reclen; 2646 if (blksiz == NFS_DIRFRAGSIZ) 2647 blksiz = 0; 2648 uiop->uio_resid -= DIRHDSIZ; 2649 uiop->uio_iov->iov_base = 2650 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2651 uiop->uio_iov->iov_len -= DIRHDSIZ; 2652 nfsm_mtouio(uiop, len); 2653 cp = uiop->uio_iov->iov_base; 2654 tlen -= len; 2655 *cp = '\0'; /* null terminate */ 2656 uiop->uio_iov->iov_base = 2657 (caddr_t)uiop->uio_iov->iov_base + tlen; 2658 uiop->uio_iov->iov_len -= tlen; 2659 uiop->uio_resid -= tlen; 2660 } else 2661 nfsm_adv(nfsm_rndup(len)); 2662 #ifndef NFS_V2_ONLY 2663 if (v3) { 2664 nfsm_dissect(tl, u_int32_t *, 2665 3 * NFSX_UNSIGNED); 2666 } else 2667 #endif 2668 { 2669 nfsm_dissect(tl, u_int32_t *, 2670 2 * NFSX_UNSIGNED); 2671 } 2672 if (bigenough) { 2673 #ifndef NFS_V2_ONLY 2674 if (v3) { 2675 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2676 uiop->uio_offset = 2677 fxdr_swapcookie3(tl); 2678 else 2679 uiop->uio_offset = 2680 fxdr_cookie3(tl); 2681 } 2682 else 2683 #endif 2684 { 2685 uiop->uio_offset = 2686 fxdr_unsigned(off_t, *tl); 2687 } 2688 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2689 } 2690 if (v3) 2691 tl += 2; 2692 else 2693 tl++; 2694 more_dirs = fxdr_unsigned(int, *tl); 2695 } 2696 /* 2697 * If at end of rpc data, get the eof boolean 2698 */ 2699 if (!more_dirs) { 2700 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2701 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2702 } 2703 m_freem(mrep); 2704 } 2705 /* 2706 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2707 * by increasing d_reclen for the last record. 2708 */ 2709 if (blksiz > 0) { 2710 left = NFS_DIRFRAGSIZ - blksiz; 2711 dp->d_reclen += left; 2712 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2713 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2714 left; 2715 uiop->uio_iov->iov_len -= left; 2716 uiop->uio_resid -= left; 2717 } 2718 2719 /* 2720 * We are now either at the end of the directory or have filled the 2721 * block. 2722 */ 2723 if (bigenough) 2724 dnp->n_direofoffset = uiop->uio_offset; 2725 nfsmout: 2726 return (error); 2727 } 2728 2729 #ifndef NFS_V2_ONLY 2730 /* 2731 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2732 */ 2733 int 2734 nfs_readdirplusrpc(vp, uiop, cred) 2735 struct vnode *vp; 2736 struct uio *uiop; 2737 struct ucred *cred; 2738 { 2739 int len, left; 2740 struct dirent *dp = NULL; 2741 u_int32_t *tl; 2742 caddr_t cp; 2743 int32_t t1, t2; 2744 struct vnode *newvp; 2745 caddr_t bpos, dpos, cp2; 2746 struct mbuf *mreq, *mrep, *md, *mb; 2747 struct nameidata nami, *ndp = &nami; 2748 struct componentname *cnp = &ndp->ni_cnd; 2749 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2750 struct nfsnode *dnp = VTONFS(vp), *np; 2751 nfsfh_t *fhp; 2752 u_quad_t fileno; 2753 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2754 int attrflag, fhsize, nrpcs = 0, reclen; 2755 struct nfs_fattr fattr, *fp; 2756 2757 #ifdef DIAGNOSTIC 2758 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2759 panic("nfs readdirplusrpc bad uio"); 2760 #endif 2761 ndp->ni_dvp = vp; 2762 newvp = NULLVP; 2763 2764 /* 2765 * Loop around doing readdir rpc's of size nm_readdirsize 2766 * truncated to a multiple of NFS_DIRFRAGSIZ. 2767 * The stopping criteria is EOF or buffer full. 2768 */ 2769 while (more_dirs && bigenough) { 2770 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2771 bigenough = 0; 2772 break; 2773 } 2774 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2775 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2776 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2777 nfsm_fhtom(dnp, 1); 2778 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2779 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2780 txdr_swapcookie3(uiop->uio_offset, tl); 2781 } else { 2782 txdr_cookie3(uiop->uio_offset, tl); 2783 } 2784 tl += 2; 2785 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2786 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2787 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2788 *tl = txdr_unsigned(nmp->nm_rsize); 2789 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2790 nfsm_postop_attr(vp, attrflag, 0); 2791 if (error) { 2792 m_freem(mrep); 2793 goto nfsmout; 2794 } 2795 nrpcs++; 2796 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2797 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2798 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2799 more_dirs = fxdr_unsigned(int, *tl); 2800 2801 /* loop thru the dir entries, doctoring them to 4bsd form */ 2802 while (more_dirs && bigenough) { 2803 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2804 fileno = fxdr_hyper(tl); 2805 len = fxdr_unsigned(int, *(tl + 2)); 2806 if (len <= 0 || len > NFS_MAXNAMLEN) { 2807 error = EBADRPC; 2808 m_freem(mrep); 2809 goto nfsmout; 2810 } 2811 tlen = nfsm_rndup(len); 2812 if (tlen == len) 2813 tlen += 4; /* To ensure null termination*/ 2814 tlen += sizeof (off_t) + sizeof (int); 2815 reclen = ALIGN(tlen + DIRHDSIZ); 2816 tlen = reclen - DIRHDSIZ; 2817 left = NFS_DIRFRAGSIZ - blksiz; 2818 if (reclen > left) { 2819 /* 2820 * DIRFRAGSIZ is aligned, no need to align 2821 * again here. 2822 */ 2823 dp->d_reclen += left; 2824 uiop->uio_iov->iov_base = 2825 (caddr_t)uiop->uio_iov->iov_base + left; 2826 uiop->uio_iov->iov_len -= left; 2827 uiop->uio_resid -= left; 2828 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2829 blksiz = 0; 2830 } 2831 if (reclen > uiop->uio_resid) 2832 bigenough = 0; 2833 if (bigenough) { 2834 dp = (struct dirent *)uiop->uio_iov->iov_base; 2835 dp->d_fileno = (int)fileno; 2836 dp->d_namlen = len; 2837 dp->d_reclen = reclen; 2838 dp->d_type = DT_UNKNOWN; 2839 blksiz += dp->d_reclen; 2840 if (blksiz == NFS_DIRFRAGSIZ) 2841 blksiz = 0; 2842 uiop->uio_resid -= DIRHDSIZ; 2843 uiop->uio_iov->iov_base = 2844 (caddr_t)uiop->uio_iov->iov_base + 2845 DIRHDSIZ; 2846 uiop->uio_iov->iov_len -= DIRHDSIZ; 2847 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2848 cnp->cn_namelen = len; 2849 nfsm_mtouio(uiop, len); 2850 cp = uiop->uio_iov->iov_base; 2851 tlen -= len; 2852 *cp = '\0'; 2853 uiop->uio_iov->iov_base = 2854 (caddr_t)uiop->uio_iov->iov_base + tlen; 2855 uiop->uio_iov->iov_len -= tlen; 2856 uiop->uio_resid -= tlen; 2857 } else 2858 nfsm_adv(nfsm_rndup(len)); 2859 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2860 if (bigenough) { 2861 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2862 uiop->uio_offset = 2863 fxdr_swapcookie3(tl); 2864 else 2865 uiop->uio_offset = 2866 fxdr_cookie3(tl); 2867 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2868 } 2869 tl += 2; 2870 2871 /* 2872 * Since the attributes are before the file handle 2873 * (sigh), we must skip over the attributes and then 2874 * come back and get them. 2875 */ 2876 attrflag = fxdr_unsigned(int, *tl); 2877 if (attrflag) { 2878 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2879 memcpy(&fattr, fp, NFSX_V3FATTR); 2880 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2881 doit = fxdr_unsigned(int, *tl); 2882 if (doit) { 2883 nfsm_getfh(fhp, fhsize, 1); 2884 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2885 VREF(vp); 2886 newvp = vp; 2887 np = dnp; 2888 } else { 2889 error = nfs_nget1(vp->v_mount, fhp, 2890 fhsize, &np, LK_NOWAIT); 2891 if (!error) 2892 newvp = NFSTOV(np); 2893 } 2894 if (!error) { 2895 const char *cp; 2896 2897 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2898 dp->d_type = 2899 IFTODT(VTTOIF(np->n_vattr->va_type)); 2900 ndp->ni_vp = newvp; 2901 cp = cnp->cn_nameptr + cnp->cn_namelen; 2902 cnp->cn_hash = 2903 namei_hash(cnp->cn_nameptr, &cp); 2904 if (cnp->cn_namelen <= NCHNAMLEN) { 2905 cache_purge1(ndp->ni_dvp, cnp, 0); 2906 nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, 2907 cnp); 2908 } 2909 } 2910 } 2911 } else { 2912 /* Just skip over the file handle */ 2913 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2914 i = fxdr_unsigned(int, *tl); 2915 nfsm_adv(nfsm_rndup(i)); 2916 } 2917 if (newvp != NULLVP) { 2918 if (newvp == vp) 2919 vrele(newvp); 2920 else 2921 vput(newvp); 2922 newvp = NULLVP; 2923 } 2924 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2925 more_dirs = fxdr_unsigned(int, *tl); 2926 } 2927 /* 2928 * If at end of rpc data, get the eof boolean 2929 */ 2930 if (!more_dirs) { 2931 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2932 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2933 } 2934 m_freem(mrep); 2935 } 2936 /* 2937 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2938 * by increasing d_reclen for the last record. 2939 */ 2940 if (blksiz > 0) { 2941 left = NFS_DIRFRAGSIZ - blksiz; 2942 dp->d_reclen += left; 2943 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2944 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2945 left; 2946 uiop->uio_iov->iov_len -= left; 2947 uiop->uio_resid -= left; 2948 } 2949 2950 /* 2951 * We are now either at the end of the directory or have filled the 2952 * block. 2953 */ 2954 if (bigenough) 2955 dnp->n_direofoffset = uiop->uio_offset; 2956 nfsmout: 2957 if (newvp != NULLVP) { 2958 if(newvp == vp) 2959 vrele(newvp); 2960 else 2961 vput(newvp); 2962 } 2963 return (error); 2964 } 2965 #endif 2966 2967 static char hextoasc[] = "0123456789abcdef"; 2968 2969 /* 2970 * Silly rename. To make the NFS filesystem that is stateless look a little 2971 * more like the "ufs" a remove of an active vnode is translated to a rename 2972 * to a funny looking filename that is removed by nfs_inactive on the 2973 * nfsnode. There is the potential for another process on a different client 2974 * to create the same funny name between the nfs_lookitup() fails and the 2975 * nfs_rename() completes, but... 2976 */ 2977 int 2978 nfs_sillyrename(dvp, vp, cnp) 2979 struct vnode *dvp, *vp; 2980 struct componentname *cnp; 2981 { 2982 struct sillyrename *sp; 2983 struct nfsnode *np; 2984 int error; 2985 short pid; 2986 2987 cache_purge(dvp); 2988 np = VTONFS(vp); 2989 #ifndef DIAGNOSTIC 2990 if (vp->v_type == VDIR) 2991 panic("nfs: sillyrename dir"); 2992 #endif 2993 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2994 M_NFSREQ, M_WAITOK); 2995 sp->s_cred = crdup(cnp->cn_cred); 2996 sp->s_dvp = dvp; 2997 VREF(dvp); 2998 2999 /* Fudge together a funny name */ 3000 pid = cnp->cn_proc->p_pid; 3001 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3002 sp->s_namlen = 12; 3003 sp->s_name[8] = hextoasc[pid & 0xf]; 3004 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 3005 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 3006 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 3007 3008 /* Try lookitups until we get one that isn't there */ 3009 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3010 cnp->cn_proc, (struct nfsnode **)0) == 0) { 3011 sp->s_name[4]++; 3012 if (sp->s_name[4] > 'z') { 3013 error = EINVAL; 3014 goto bad; 3015 } 3016 } 3017 error = nfs_renameit(dvp, cnp, sp); 3018 if (error) 3019 goto bad; 3020 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3021 cnp->cn_proc, &np); 3022 np->n_sillyrename = sp; 3023 return (0); 3024 bad: 3025 vrele(sp->s_dvp); 3026 crfree(sp->s_cred); 3027 free((caddr_t)sp, M_NFSREQ); 3028 return (error); 3029 } 3030 3031 /* 3032 * Look up a file name and optionally either update the file handle or 3033 * allocate an nfsnode, depending on the value of npp. 3034 * npp == NULL --> just do the lookup 3035 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3036 * handled too 3037 * *npp != NULL --> update the file handle in the vnode 3038 */ 3039 int 3040 nfs_lookitup(dvp, name, len, cred, procp, npp) 3041 struct vnode *dvp; 3042 const char *name; 3043 int len; 3044 struct ucred *cred; 3045 struct proc *procp; 3046 struct nfsnode **npp; 3047 { 3048 u_int32_t *tl; 3049 caddr_t cp; 3050 int32_t t1, t2; 3051 struct vnode *newvp = (struct vnode *)0; 3052 struct nfsnode *np, *dnp = VTONFS(dvp); 3053 caddr_t bpos, dpos, cp2; 3054 int error = 0, fhlen; 3055 #ifndef NFS_V2_ONLY 3056 int attrflag; 3057 #endif 3058 struct mbuf *mreq, *mrep, *md, *mb; 3059 nfsfh_t *nfhp; 3060 const int v3 = NFS_ISV3(dvp); 3061 3062 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3063 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3064 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3065 nfsm_fhtom(dnp, v3); 3066 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3067 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 3068 if (npp && !error) { 3069 nfsm_getfh(nfhp, fhlen, v3); 3070 if (*npp) { 3071 np = *npp; 3072 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3073 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3074 np->n_fhp = &np->n_fh; 3075 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3076 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3077 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3078 np->n_fhsize = fhlen; 3079 newvp = NFSTOV(np); 3080 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3081 VREF(dvp); 3082 newvp = dvp; 3083 np = dnp; 3084 } else { 3085 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3086 if (error) { 3087 m_freem(mrep); 3088 return (error); 3089 } 3090 newvp = NFSTOV(np); 3091 } 3092 #ifndef NFS_V2_ONLY 3093 if (v3) { 3094 nfsm_postop_attr(newvp, attrflag, 0); 3095 if (!attrflag && *npp == NULL) { 3096 m_freem(mrep); 3097 vput(newvp); 3098 return (ENOENT); 3099 } 3100 } else 3101 #endif 3102 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3103 } 3104 nfsm_reqdone; 3105 if (npp && *npp == NULL) { 3106 if (error) { 3107 if (newvp) 3108 vput(newvp); 3109 } else 3110 *npp = np; 3111 } 3112 return (error); 3113 } 3114 3115 #ifndef NFS_V2_ONLY 3116 /* 3117 * Nfs Version 3 commit rpc 3118 */ 3119 int 3120 nfs_commit(vp, offset, cnt, procp) 3121 struct vnode *vp; 3122 off_t offset; 3123 uint32_t cnt; 3124 struct proc *procp; 3125 { 3126 caddr_t cp; 3127 u_int32_t *tl; 3128 int32_t t1, t2; 3129 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3130 caddr_t bpos, dpos, cp2; 3131 int error = 0, wccflag = NFSV3_WCCRATTR; 3132 struct mbuf *mreq, *mrep, *md, *mb; 3133 struct nfsnode *np; 3134 3135 KASSERT(NFS_ISV3(vp)); 3136 3137 #ifdef NFS_DEBUG_COMMIT 3138 printf("commit %lu - %lu\n", (unsigned long)offset, 3139 (unsigned long)(offset + cnt)); 3140 #endif 3141 3142 simple_lock(&nmp->nm_slock); 3143 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3144 simple_unlock(&nmp->nm_slock); 3145 return (0); 3146 } 3147 simple_unlock(&nmp->nm_slock); 3148 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3149 np = VTONFS(vp); 3150 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3151 nfsm_fhtom(np, 1); 3152 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3153 txdr_hyper(offset, tl); 3154 tl += 2; 3155 *tl = txdr_unsigned(cnt); 3156 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3157 nfsm_wcc_data(vp, wccflag, 0); 3158 if (!error) { 3159 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3160 simple_lock(&nmp->nm_slock); 3161 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3162 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3163 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3164 error = NFSERR_STALEWRITEVERF; 3165 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3166 } 3167 simple_unlock(&nmp->nm_slock); 3168 } 3169 nfsm_reqdone; 3170 return (error); 3171 } 3172 #endif 3173 3174 /* 3175 * Kludge City.. 3176 * - make nfs_bmap() essentially a no-op that does no translation 3177 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3178 * (Maybe I could use the process's page mapping, but I was concerned that 3179 * Kernel Write might not be enabled and also figured copyout() would do 3180 * a lot more work than memcpy() and also it currently happens in the 3181 * context of the swapper process (2). 3182 */ 3183 int 3184 nfs_bmap(v) 3185 void *v; 3186 { 3187 struct vop_bmap_args /* { 3188 struct vnode *a_vp; 3189 daddr_t a_bn; 3190 struct vnode **a_vpp; 3191 daddr_t *a_bnp; 3192 int *a_runp; 3193 } */ *ap = v; 3194 struct vnode *vp = ap->a_vp; 3195 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3196 3197 if (ap->a_vpp != NULL) 3198 *ap->a_vpp = vp; 3199 if (ap->a_bnp != NULL) 3200 *ap->a_bnp = ap->a_bn << bshift; 3201 if (ap->a_runp != NULL) 3202 *ap->a_runp = 1024 * 1024; /* XXX */ 3203 return (0); 3204 } 3205 3206 /* 3207 * Strategy routine. 3208 * For async requests when nfsiod(s) are running, queue the request by 3209 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3210 * request. 3211 */ 3212 int 3213 nfs_strategy(v) 3214 void *v; 3215 { 3216 struct vop_strategy_args *ap = v; 3217 struct buf *bp = ap->a_bp; 3218 struct proc *p; 3219 int error = 0; 3220 3221 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3222 panic("nfs physio/async"); 3223 if (bp->b_flags & B_ASYNC) 3224 p = NULL; 3225 else 3226 p = curproc; /* XXX */ 3227 3228 /* 3229 * If the op is asynchronous and an i/o daemon is waiting 3230 * queue the request, wake it up and wait for completion 3231 * otherwise just do it ourselves. 3232 */ 3233 3234 if ((bp->b_flags & B_ASYNC) == 0 || 3235 nfs_asyncio(bp)) 3236 error = nfs_doio(bp, p); 3237 return (error); 3238 } 3239 3240 /* 3241 * fsync vnode op. Just call nfs_flush() with commit == 1. 3242 */ 3243 /* ARGSUSED */ 3244 int 3245 nfs_fsync(v) 3246 void *v; 3247 { 3248 struct vop_fsync_args /* { 3249 struct vnodeop_desc *a_desc; 3250 struct vnode * a_vp; 3251 struct ucred * a_cred; 3252 int a_flags; 3253 off_t offlo; 3254 off_t offhi; 3255 struct proc * a_p; 3256 } */ *ap = v; 3257 3258 struct vnode *vp = ap->a_vp; 3259 3260 if (vp->v_type != VREG) 3261 return 0; 3262 3263 return (nfs_flush(vp, ap->a_cred, 3264 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3265 } 3266 3267 /* 3268 * Flush all the data associated with a vnode. 3269 */ 3270 int 3271 nfs_flush(vp, cred, waitfor, p, commit) 3272 struct vnode *vp; 3273 struct ucred *cred; 3274 int waitfor; 3275 struct proc *p; 3276 int commit; 3277 { 3278 struct nfsnode *np = VTONFS(vp); 3279 int error; 3280 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3281 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3282 3283 simple_lock(&vp->v_interlock); 3284 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3285 if (np->n_flag & NWRITEERR) { 3286 error = np->n_error; 3287 np->n_flag &= ~NWRITEERR; 3288 } 3289 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3290 return (error); 3291 } 3292 3293 /* 3294 * Return POSIX pathconf information applicable to nfs. 3295 * 3296 * N.B. The NFS V2 protocol doesn't support this RPC. 3297 */ 3298 /* ARGSUSED */ 3299 int 3300 nfs_pathconf(v) 3301 void *v; 3302 { 3303 struct vop_pathconf_args /* { 3304 struct vnode *a_vp; 3305 int a_name; 3306 register_t *a_retval; 3307 } */ *ap = v; 3308 struct nfsv3_pathconf *pcp; 3309 struct vnode *vp = ap->a_vp; 3310 struct mbuf *mreq, *mrep, *md, *mb; 3311 int32_t t1, t2; 3312 u_int32_t *tl; 3313 caddr_t bpos, dpos, cp, cp2; 3314 int error = 0, attrflag; 3315 #ifndef NFS_V2_ONLY 3316 struct nfsmount *nmp; 3317 unsigned int l; 3318 u_int64_t maxsize; 3319 #endif 3320 const int v3 = NFS_ISV3(vp); 3321 struct nfsnode *np = VTONFS(vp); 3322 3323 switch (ap->a_name) { 3324 /* Names that can be resolved locally. */ 3325 case _PC_PIPE_BUF: 3326 *ap->a_retval = PIPE_BUF; 3327 break; 3328 case _PC_SYNC_IO: 3329 *ap->a_retval = 1; 3330 break; 3331 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3332 case _PC_LINK_MAX: 3333 case _PC_NAME_MAX: 3334 case _PC_CHOWN_RESTRICTED: 3335 case _PC_NO_TRUNC: 3336 if (!v3) { 3337 error = EINVAL; 3338 break; 3339 } 3340 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3341 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3342 nfsm_fhtom(np, 1); 3343 nfsm_request(np, NFSPROC_PATHCONF, 3344 curproc, curproc->p_ucred); /* XXX */ 3345 nfsm_postop_attr(vp, attrflag, 0); 3346 if (!error) { 3347 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3348 NFSX_V3PATHCONF); 3349 switch (ap->a_name) { 3350 case _PC_LINK_MAX: 3351 *ap->a_retval = 3352 fxdr_unsigned(register_t, pcp->pc_linkmax); 3353 break; 3354 case _PC_NAME_MAX: 3355 *ap->a_retval = 3356 fxdr_unsigned(register_t, pcp->pc_namemax); 3357 break; 3358 case _PC_CHOWN_RESTRICTED: 3359 *ap->a_retval = 3360 (pcp->pc_chownrestricted == nfs_true); 3361 break; 3362 case _PC_NO_TRUNC: 3363 *ap->a_retval = 3364 (pcp->pc_notrunc == nfs_true); 3365 break; 3366 } 3367 } 3368 nfsm_reqdone; 3369 break; 3370 case _PC_FILESIZEBITS: 3371 #ifndef NFS_V2_ONLY 3372 if (v3) { 3373 nmp = VFSTONFS(vp->v_mount); 3374 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3375 if ((error = nfs_fsinfo(nmp, vp, 3376 curproc->p_ucred, curproc)) != 0) /* XXX */ 3377 break; 3378 for (l = 0, maxsize = nmp->nm_maxfilesize; 3379 (maxsize >> l) > 0; l++) 3380 ; 3381 *ap->a_retval = l + 1; 3382 } else 3383 #endif 3384 { 3385 *ap->a_retval = 32; /* NFS V2 limitation */ 3386 } 3387 break; 3388 default: 3389 error = EINVAL; 3390 break; 3391 } 3392 3393 return (error); 3394 } 3395 3396 /* 3397 * NFS advisory byte-level locks. 3398 */ 3399 int 3400 nfs_advlock(v) 3401 void *v; 3402 { 3403 struct vop_advlock_args /* { 3404 struct vnode *a_vp; 3405 caddr_t a_id; 3406 int a_op; 3407 struct flock *a_fl; 3408 int a_flags; 3409 } */ *ap = v; 3410 struct nfsnode *np = VTONFS(ap->a_vp); 3411 3412 return lf_advlock(ap, &np->n_lockf, np->n_size); 3413 } 3414 3415 /* 3416 * Print out the contents of an nfsnode. 3417 */ 3418 int 3419 nfs_print(v) 3420 void *v; 3421 { 3422 struct vop_print_args /* { 3423 struct vnode *a_vp; 3424 } */ *ap = v; 3425 struct vnode *vp = ap->a_vp; 3426 struct nfsnode *np = VTONFS(vp); 3427 3428 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3429 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3430 if (vp->v_type == VFIFO) 3431 fifo_printinfo(vp); 3432 printf("\n"); 3433 return (0); 3434 } 3435 3436 /* 3437 * NFS file truncation. 3438 */ 3439 int 3440 nfs_truncate(v) 3441 void *v; 3442 { 3443 #if 0 3444 struct vop_truncate_args /* { 3445 struct vnode *a_vp; 3446 off_t a_length; 3447 int a_flags; 3448 struct ucred *a_cred; 3449 struct proc *a_p; 3450 } */ *ap = v; 3451 #endif 3452 3453 /* Use nfs_setattr */ 3454 return (EOPNOTSUPP); 3455 } 3456 3457 /* 3458 * Just call bwrite(). 3459 */ 3460 int 3461 nfs_bwrite(v) 3462 void *v; 3463 { 3464 struct vop_bwrite_args /* { 3465 struct vnode *a_bp; 3466 } */ *ap = v; 3467 3468 return (bwrite(ap->a_bp)); 3469 } 3470 3471 /* 3472 * nfs unlock wrapper. 3473 */ 3474 int 3475 nfs_unlock(void *v) 3476 { 3477 struct vop_unlock_args /* { 3478 struct vnode *a_vp; 3479 int a_flags; 3480 } */ *ap = v; 3481 struct vnode *vp = ap->a_vp; 3482 3483 /* 3484 * VOP_UNLOCK can be called by nfs_loadattrcache 3485 * with v_data == 0. 3486 */ 3487 if (VTONFS(vp)) { 3488 nfs_delayedtruncate(vp); 3489 } 3490 3491 return genfs_unlock(v); 3492 } 3493 3494 /* 3495 * nfs special file access vnode op. 3496 * Essentially just get vattr and then imitate iaccess() since the device is 3497 * local to the client. 3498 */ 3499 int 3500 nfsspec_access(v) 3501 void *v; 3502 { 3503 struct vop_access_args /* { 3504 struct vnode *a_vp; 3505 int a_mode; 3506 struct ucred *a_cred; 3507 struct proc *a_p; 3508 } */ *ap = v; 3509 struct vattr va; 3510 struct vnode *vp = ap->a_vp; 3511 int error; 3512 3513 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3514 if (error) 3515 return (error); 3516 3517 /* 3518 * Disallow write attempts on filesystems mounted read-only; 3519 * unless the file is a socket, fifo, or a block or character 3520 * device resident on the filesystem. 3521 */ 3522 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3523 switch (vp->v_type) { 3524 case VREG: 3525 case VDIR: 3526 case VLNK: 3527 return (EROFS); 3528 default: 3529 break; 3530 } 3531 } 3532 3533 return (vaccess(va.va_type, va.va_mode, 3534 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3535 } 3536 3537 /* 3538 * Read wrapper for special devices. 3539 */ 3540 int 3541 nfsspec_read(v) 3542 void *v; 3543 { 3544 struct vop_read_args /* { 3545 struct vnode *a_vp; 3546 struct uio *a_uio; 3547 int a_ioflag; 3548 struct ucred *a_cred; 3549 } */ *ap = v; 3550 struct nfsnode *np = VTONFS(ap->a_vp); 3551 3552 /* 3553 * Set access flag. 3554 */ 3555 np->n_flag |= NACC; 3556 np->n_atim.tv_sec = time.tv_sec; 3557 np->n_atim.tv_nsec = time.tv_usec * 1000; 3558 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3559 } 3560 3561 /* 3562 * Write wrapper for special devices. 3563 */ 3564 int 3565 nfsspec_write(v) 3566 void *v; 3567 { 3568 struct vop_write_args /* { 3569 struct vnode *a_vp; 3570 struct uio *a_uio; 3571 int a_ioflag; 3572 struct ucred *a_cred; 3573 } */ *ap = v; 3574 struct nfsnode *np = VTONFS(ap->a_vp); 3575 3576 /* 3577 * Set update flag. 3578 */ 3579 np->n_flag |= NUPD; 3580 np->n_mtim.tv_sec = time.tv_sec; 3581 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3582 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3583 } 3584 3585 /* 3586 * Close wrapper for special devices. 3587 * 3588 * Update the times on the nfsnode then do device close. 3589 */ 3590 int 3591 nfsspec_close(v) 3592 void *v; 3593 { 3594 struct vop_close_args /* { 3595 struct vnode *a_vp; 3596 int a_fflag; 3597 struct ucred *a_cred; 3598 struct proc *a_p; 3599 } */ *ap = v; 3600 struct vnode *vp = ap->a_vp; 3601 struct nfsnode *np = VTONFS(vp); 3602 struct vattr vattr; 3603 3604 if (np->n_flag & (NACC | NUPD)) { 3605 np->n_flag |= NCHG; 3606 if (vp->v_usecount == 1 && 3607 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3608 VATTR_NULL(&vattr); 3609 if (np->n_flag & NACC) 3610 vattr.va_atime = np->n_atim; 3611 if (np->n_flag & NUPD) 3612 vattr.va_mtime = np->n_mtim; 3613 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3614 } 3615 } 3616 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3617 } 3618 3619 /* 3620 * Read wrapper for fifos. 3621 */ 3622 int 3623 nfsfifo_read(v) 3624 void *v; 3625 { 3626 struct vop_read_args /* { 3627 struct vnode *a_vp; 3628 struct uio *a_uio; 3629 int a_ioflag; 3630 struct ucred *a_cred; 3631 } */ *ap = v; 3632 struct nfsnode *np = VTONFS(ap->a_vp); 3633 3634 /* 3635 * Set access flag. 3636 */ 3637 np->n_flag |= NACC; 3638 np->n_atim.tv_sec = time.tv_sec; 3639 np->n_atim.tv_nsec = time.tv_usec * 1000; 3640 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3641 } 3642 3643 /* 3644 * Write wrapper for fifos. 3645 */ 3646 int 3647 nfsfifo_write(v) 3648 void *v; 3649 { 3650 struct vop_write_args /* { 3651 struct vnode *a_vp; 3652 struct uio *a_uio; 3653 int a_ioflag; 3654 struct ucred *a_cred; 3655 } */ *ap = v; 3656 struct nfsnode *np = VTONFS(ap->a_vp); 3657 3658 /* 3659 * Set update flag. 3660 */ 3661 np->n_flag |= NUPD; 3662 np->n_mtim.tv_sec = time.tv_sec; 3663 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3664 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3665 } 3666 3667 /* 3668 * Close wrapper for fifos. 3669 * 3670 * Update the times on the nfsnode then do fifo close. 3671 */ 3672 int 3673 nfsfifo_close(v) 3674 void *v; 3675 { 3676 struct vop_close_args /* { 3677 struct vnode *a_vp; 3678 int a_fflag; 3679 struct ucred *a_cred; 3680 struct proc *a_p; 3681 } */ *ap = v; 3682 struct vnode *vp = ap->a_vp; 3683 struct nfsnode *np = VTONFS(vp); 3684 struct vattr vattr; 3685 3686 if (np->n_flag & (NACC | NUPD)) { 3687 if (np->n_flag & NACC) { 3688 np->n_atim.tv_sec = time.tv_sec; 3689 np->n_atim.tv_nsec = time.tv_usec * 1000; 3690 } 3691 if (np->n_flag & NUPD) { 3692 np->n_mtim.tv_sec = time.tv_sec; 3693 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3694 } 3695 np->n_flag |= NCHG; 3696 if (vp->v_usecount == 1 && 3697 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3698 VATTR_NULL(&vattr); 3699 if (np->n_flag & NACC) 3700 vattr.va_atime = np->n_atim; 3701 if (np->n_flag & NUPD) 3702 vattr.va_mtime = np->n_mtim; 3703 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3704 } 3705 } 3706 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3707 } 3708
Indexes created Thu Sep 25 16:09:42 GMT 2025