| 1 | /* |
| 2 | * Copyright (c) 2016 Apple Inc. All rights reserved. |
| 3 | * |
| 4 | * @APPLE_LICENSE_HEADER_START@ |
| 5 | * |
| 6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| 9 | * compliance with the License. Please obtain a copy of the License at |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| 11 | * file. |
| 12 | * |
| 13 | * The Original Code and all software distributed under the License are |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 18 | * Please see the License for the specific language governing rights and |
| 19 | * limitations under the License. |
| 20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ |
| 22 | */ |
| 23 | |
| 24 | /*- |
| 25 | * Portions Copyright (c) 1992, 1993 |
| 26 | * The Regents of the University of California. All rights reserved. |
| 27 | * |
| 28 | * This code is derived from software contributed to Berkeley by |
| 29 | * John Heidemann of the UCLA Ficus project. |
| 30 | * |
| 31 | * Redistribution and use in source and binary forms, with or without |
| 32 | * modification, are permitted provided that the following conditions |
| 33 | * are met: |
| 34 | * 1. Redistributions of source code must retain the above copyright |
| 35 | * notice, this list of conditions and the following disclaimer. |
| 36 | * 2. Redistributions in binary form must reproduce the above copyright |
| 37 | * notice, this list of conditions and the following disclaimer in the |
| 38 | * documentation and/or other materials provided with the distribution. |
| 39 | * 4. Neither the name of the University nor the names of its contributors |
| 40 | * may be used to endorse or promote products derived from this software |
| 41 | * without specific prior written permission. |
| 42 | * |
| 43 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 44 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 46 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 49 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 51 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 52 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 53 | * SUCH DAMAGE. |
| 54 | * |
| 55 | * @(#)null_vnops.c 8.6 (Berkeley) 5/27/95 |
| 56 | * |
| 57 | * Ancestors: |
| 58 | * @(#)lofs_vnops.c 1.2 (Berkeley) 6/18/92 |
| 59 | * ...and... |
| 60 | * @(#)null_vnodeops.c 1.20 92/07/07 UCLA Ficus project |
| 61 | * |
| 62 | * $FreeBSD$ |
| 63 | */ |
| 64 | |
| 65 | #include <sys/param.h> |
| 66 | #include <sys/systm.h> |
| 67 | #include <sys/conf.h> |
| 68 | #include <sys/kernel.h> |
| 69 | #include <sys/lock.h> |
| 70 | #include <sys/malloc.h> |
| 71 | #include <sys/mount.h> |
| 72 | #include <sys/mount_internal.h> |
| 73 | #include <sys/namei.h> |
| 74 | #include <sys/sysctl.h> |
| 75 | #include <sys/vnode.h> |
| 76 | #include <sys/xattr.h> |
| 77 | #include <sys/ubc.h> |
| 78 | #include <sys/types.h> |
| 79 | #include <sys/dirent.h> |
| 80 | |
| 81 | #include "nullfs.h" |
| 82 | |
| 83 | #define NULL_ROOT_INO 2 |
| 84 | #define NULL_SECOND_INO 3 |
| 85 | #define NULL_THIRD_INO 4 |
| 86 | |
| 87 | vop_t * nullfs_vnodeop_p = NULL; |
| 88 | |
| 89 | /* the mountpoint lock should be held going into this function */ |
| 90 | static int |
| 91 | nullfs_isspecialvp(struct vnode * vp) |
| 92 | { |
| 93 | struct null_mount * null_mp; |
| 94 | |
| 95 | null_mp = MOUNTTONULLMOUNT(vnode_mount(vp)); |
| 96 | |
| 97 | /* only check for root and second here, third is special in a different way, |
| 98 | * related only to lookup and readdir */ |
| 99 | if (vp && (vp == null_mp->nullm_rootvp || vp == null_mp->nullm_secondvp)) { |
| 100 | return 1; |
| 101 | } |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | /* helper function to handle locking where possible */ |
| 106 | static int |
| 107 | nullfs_checkspecialvp(struct vnode* vp) |
| 108 | { |
| 109 | int result = 0; |
| 110 | struct null_mount * null_mp; |
| 111 | |
| 112 | null_mp = MOUNTTONULLMOUNT(vnode_mount(vp)); |
| 113 | |
| 114 | lck_mtx_lock(&null_mp->nullm_lock); |
| 115 | result = (nullfs_isspecialvp(vp)); |
| 116 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 117 | |
| 118 | return result; |
| 119 | } |
| 120 | |
| 121 | static int |
| 122 | nullfs_default(__unused struct vnop_generic_args * args) |
| 123 | { |
| 124 | NULLFSDEBUG("%s (default)\n", ((struct vnodeop_desc_fake *)args->a_desc)->vdesc_name); |
| 125 | return ENOTSUP; |
| 126 | } |
| 127 | |
| 128 | static int |
| 129 | nullfs_special_getattr(struct vnop_getattr_args * args) |
| 130 | { |
| 131 | mount_t mp = vnode_mount(args->a_vp); |
| 132 | struct null_mount * null_mp = MOUNTTONULLMOUNT(mp); |
| 133 | |
| 134 | ino_t ino = NULL_ROOT_INO; |
| 135 | struct vnode_attr covered_rootattr; |
| 136 | vnode_t checkvp = null_mp->nullm_lowerrootvp; |
| 137 | |
| 138 | VATTR_INIT(&covered_rootattr); |
| 139 | VATTR_WANTED(&covered_rootattr, va_uid); |
| 140 | VATTR_WANTED(&covered_rootattr, va_gid); |
| 141 | VATTR_WANTED(&covered_rootattr, va_create_time); |
| 142 | VATTR_WANTED(&covered_rootattr, va_modify_time); |
| 143 | VATTR_WANTED(&covered_rootattr, va_access_time); |
| 144 | |
| 145 | /* prefer to get this from the lower root vp, but if not (i.e. forced unmount |
| 146 | * of lower fs) try the mount point covered vnode */ |
| 147 | if (vnode_getwithvid(checkvp, null_mp->nullm_lowerrootvid)) { |
| 148 | checkvp = vfs_vnodecovered(mp); |
| 149 | if (checkvp == NULL) { |
| 150 | return EIO; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | int error = vnode_getattr(checkvp, &covered_rootattr, args->a_context); |
| 155 | |
| 156 | vnode_put(checkvp); |
| 157 | if (error) { |
| 158 | /* we should have been able to get attributes fore one of the two choices so |
| 159 | * fail if we didn't */ |
| 160 | return error; |
| 161 | } |
| 162 | |
| 163 | /* we got the attributes of the vnode we cover so plow ahead */ |
| 164 | if (args->a_vp == null_mp->nullm_secondvp) { |
| 165 | ino = NULL_SECOND_INO; |
| 166 | } |
| 167 | |
| 168 | VATTR_RETURN(args->a_vap, va_type, vnode_vtype(args->a_vp)); |
| 169 | VATTR_RETURN(args->a_vap, va_rdev, 0); |
| 170 | VATTR_RETURN(args->a_vap, va_nlink, 3); /* always just ., .., and the child */ |
| 171 | VATTR_RETURN(args->a_vap, va_total_size, 0); // hoping this is ok |
| 172 | |
| 173 | VATTR_RETURN(args->a_vap, va_data_size, 0); // hoping this is ok |
| 174 | VATTR_RETURN(args->a_vap, va_data_alloc, 0); |
| 175 | VATTR_RETURN(args->a_vap, va_iosize, vfs_statfs(mp)->f_iosize); |
| 176 | VATTR_RETURN(args->a_vap, va_fileid, ino); |
| 177 | VATTR_RETURN(args->a_vap, va_linkid, ino); |
| 178 | VATTR_RETURN(args->a_vap, va_fsid, vfs_statfs(mp)->f_fsid.val[0]); // return the fsid of the mount point |
| 179 | VATTR_RETURN(args->a_vap, va_filerev, 0); |
| 180 | VATTR_RETURN(args->a_vap, va_gen, 0); |
| 181 | VATTR_RETURN(args->a_vap, va_flags, UF_HIDDEN); /* mark our fake directories as hidden. People |
| 182 | shouldn't be enocouraged to poke around in them */ |
| 183 | |
| 184 | if (ino == NULL_SECOND_INO) { |
| 185 | VATTR_RETURN(args->a_vap, va_parentid, NULL_ROOT_INO); /* no parent at the root, so |
| 186 | the only other vnode that |
| 187 | goes through this path is |
| 188 | second and its parent is |
| 189 | 1.*/ |
| 190 | } |
| 191 | |
| 192 | if (VATTR_IS_ACTIVE(args->a_vap, va_mode)) { |
| 193 | /* force dr_xr_xr_x */ |
| 194 | VATTR_RETURN(args->a_vap, va_mode, S_IFDIR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); |
| 195 | } |
| 196 | if (VATTR_IS_ACTIVE(args->a_vap, va_uid)) { |
| 197 | VATTR_RETURN(args->a_vap, va_uid, covered_rootattr.va_uid); |
| 198 | } |
| 199 | if (VATTR_IS_ACTIVE(args->a_vap, va_gid)) { |
| 200 | VATTR_RETURN(args->a_vap, va_gid, covered_rootattr.va_gid); |
| 201 | } |
| 202 | |
| 203 | if (VATTR_IS_ACTIVE(args->a_vap, va_create_time)) { |
| 204 | VATTR_SET_SUPPORTED(args->a_vap, va_create_time); |
| 205 | args->a_vap->va_create_time.tv_sec = covered_rootattr.va_create_time.tv_sec; |
| 206 | args->a_vap->va_create_time.tv_nsec = covered_rootattr.va_create_time.tv_nsec; |
| 207 | } |
| 208 | if (VATTR_IS_ACTIVE(args->a_vap, va_modify_time)) { |
| 209 | VATTR_SET_SUPPORTED(args->a_vap, va_modify_time); |
| 210 | args->a_vap->va_modify_time.tv_sec = covered_rootattr.va_modify_time.tv_sec; |
| 211 | args->a_vap->va_modify_time.tv_nsec = covered_rootattr.va_modify_time.tv_nsec; |
| 212 | } |
| 213 | if (VATTR_IS_ACTIVE(args->a_vap, va_access_time)) { |
| 214 | VATTR_SET_SUPPORTED(args->a_vap, va_access_time); |
| 215 | args->a_vap->va_modify_time.tv_sec = covered_rootattr.va_access_time.tv_sec; |
| 216 | args->a_vap->va_modify_time.tv_nsec = covered_rootattr.va_access_time.tv_nsec; |
| 217 | } |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static int |
| 223 | nullfs_getattr(struct vnop_getattr_args * args) |
| 224 | { |
| 225 | int error; |
| 226 | struct null_mount * null_mp = MOUNTTONULLMOUNT(vnode_mount(args->a_vp)); |
| 227 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 228 | |
| 229 | lck_mtx_lock(&null_mp->nullm_lock); |
| 230 | if (nullfs_isspecialvp(args->a_vp)) { |
| 231 | error = nullfs_special_getattr(args); |
| 232 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 233 | return error; |
| 234 | } |
| 235 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 236 | |
| 237 | /* this will return a different inode for third than read dir will */ |
| 238 | struct vnode * lowervp = NULLVPTOLOWERVP(args->a_vp); |
| 239 | |
| 240 | error = vnode_getwithref(lowervp); |
| 241 | if (error == 0) { |
| 242 | error = VNOP_GETATTR(lowervp, args->a_vap, args->a_context); |
| 243 | vnode_put(lowervp); |
| 244 | |
| 245 | if (error == 0) { |
| 246 | /* fix up fsid so it doesn't say the underlying fs*/ |
| 247 | VATTR_RETURN(args->a_vap, va_fsid, vfs_statfs(vnode_mount(args->a_vp))->f_fsid.val[0]); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | return error; |
| 252 | } |
| 253 | |
| 254 | static int |
| 255 | nullfs_open(struct vnop_open_args * args) |
| 256 | { |
| 257 | int error; |
| 258 | struct vnode *vp, *lvp; |
| 259 | |
| 260 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 261 | |
| 262 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 263 | return 0; /* nothing extra needed */ |
| 264 | } |
| 265 | |
| 266 | vp = args->a_vp; |
| 267 | lvp = NULLVPTOLOWERVP(vp); |
| 268 | error = vnode_getwithref(lvp); |
| 269 | if (error == 0) { |
| 270 | error = VNOP_OPEN(lvp, args->a_mode, args->a_context); |
| 271 | vnode_put(lvp); |
| 272 | } |
| 273 | |
| 274 | return error; |
| 275 | } |
| 276 | |
| 277 | static int |
| 278 | nullfs_close(struct vnop_close_args * args) |
| 279 | { |
| 280 | int error; |
| 281 | struct vnode *vp, *lvp; |
| 282 | |
| 283 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 284 | |
| 285 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 286 | return 0; /* nothing extra needed */ |
| 287 | } |
| 288 | |
| 289 | vp = args->a_vp; |
| 290 | lvp = NULLVPTOLOWERVP(vp); |
| 291 | |
| 292 | error = vnode_getwithref(lvp); |
| 293 | if (error == 0) { |
| 294 | error = VNOP_CLOSE(lvp, args->a_fflag, args->a_context); |
| 295 | vnode_put(lvp); |
| 296 | } |
| 297 | return error; |
| 298 | } |
| 299 | |
| 300 | /* get lvp's parent, if possible, even if it isn't set. |
| 301 | |
| 302 | lvp is expected to have an iocount before and after this call. |
| 303 | |
| 304 | if a dvpp is populated the returned vnode has an iocount. */ |
| 305 | static int |
| 306 | null_get_lowerparent(vnode_t lvp, vnode_t * dvpp, vfs_context_t ctx) |
| 307 | { |
| 308 | int error = 0; |
| 309 | struct vnode_attr va; |
| 310 | mount_t mp = vnode_mount(lvp); |
| 311 | vnode_t dvp = vnode_parent(lvp); |
| 312 | |
| 313 | if (dvp) { |
| 314 | error = vnode_get(dvp); |
| 315 | goto end; |
| 316 | } |
| 317 | |
| 318 | error = ENOENT; |
| 319 | if (!(mp->mnt_kern_flag & MNTK_PATH_FROM_ID)) { |
| 320 | goto end; |
| 321 | } |
| 322 | |
| 323 | VATTR_INIT(&va); |
| 324 | VATTR_WANTED(&va, va_parentid); |
| 325 | |
| 326 | error = vnode_getattr(lvp, &va, ctx); |
| 327 | |
| 328 | if (error || !VATTR_IS_SUPPORTED(&va, va_parentid)) { |
| 329 | goto end; |
| 330 | } |
| 331 | |
| 332 | error = VFS_VGET(mp, (ino64_t)va.va_parentid, &dvp, ctx); |
| 333 | |
| 334 | end: |
| 335 | if (error == 0) { |
| 336 | *dvpp = dvp; |
| 337 | } |
| 338 | return error; |
| 339 | } |
| 340 | |
| 341 | /* the mountpoint lock should be held going into this function */ |
| 342 | static int |
| 343 | null_special_lookup(struct vnop_lookup_args * ap) |
| 344 | { |
| 345 | struct componentname * cnp = ap->a_cnp; |
| 346 | struct vnode * dvp = ap->a_dvp; |
| 347 | struct vnode * ldvp = NULL; |
| 348 | struct vnode * lvp = NULL; |
| 349 | struct vnode * vp = NULL; |
| 350 | struct mount * mp = vnode_mount(dvp); |
| 351 | struct null_mount * null_mp = MOUNTTONULLMOUNT(mp); |
| 352 | int error = ENOENT; |
| 353 | |
| 354 | if (dvp == null_mp->nullm_rootvp) { |
| 355 | /* handle . and .. */ |
| 356 | if (cnp->cn_nameptr[0] == '.') { |
| 357 | if (cnp->cn_namelen == 1 || (cnp->cn_namelen == 2 && cnp->cn_nameptr[1] == '.')) { |
| 358 | /* this is the root so both . and .. give back the root */ |
| 359 | vp = dvp; |
| 360 | error = vnode_get(vp); |
| 361 | goto end; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | /* our virtual wrapper directory should be d but D is acceptable if the |
| 366 | * lower file system is case insensitive */ |
| 367 | if (cnp->cn_namelen == 1 && |
| 368 | (cnp->cn_nameptr[0] == 'd' || (null_mp->nullm_flags & NULLM_CASEINSENSITIVE ? cnp->cn_nameptr[0] == 'D' : 0))) { |
| 369 | error = 0; |
| 370 | if (null_mp->nullm_secondvp == NULL) { |
| 371 | error = null_getnewvnode(mp, NULL, dvp, &vp, cnp, 0); |
| 372 | if (error) { |
| 373 | goto end; |
| 374 | } |
| 375 | |
| 376 | null_mp->nullm_secondvp = vp; |
| 377 | } else { |
| 378 | vp = null_mp->nullm_secondvp; |
| 379 | error = vnode_get(vp); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | } else if (dvp == null_mp->nullm_secondvp) { |
| 384 | /* handle . and .. */ |
| 385 | if (cnp->cn_nameptr[0] == '.') { |
| 386 | if (cnp->cn_namelen == 1) { |
| 387 | vp = dvp; |
| 388 | error = vnode_get(vp); |
| 389 | goto end; |
| 390 | } else if (cnp->cn_namelen == 2 && cnp->cn_nameptr[1] == '.') { |
| 391 | /* parent here is the root vp */ |
| 392 | vp = null_mp->nullm_rootvp; |
| 393 | error = vnode_get(vp); |
| 394 | goto end; |
| 395 | } |
| 396 | } |
| 397 | /* nullmp->nullm_lowerrootvp was set at mount time so don't need to lock to |
| 398 | * access it */ |
| 399 | /* v_name should be null terminated but cn_nameptr is not necessarily. |
| 400 | cn_namelen is the number of characters before the null in either case */ |
| 401 | error = vnode_getwithvid(null_mp->nullm_lowerrootvp, null_mp->nullm_lowerrootvid); |
| 402 | if (error) { |
| 403 | goto end; |
| 404 | } |
| 405 | |
| 406 | /* We don't want to mess with case insensitivity and unicode, so the plan to |
| 407 | check here is |
| 408 | 1. try to get the lower root's parent |
| 409 | 2. If we get a parent, then perform a lookup on the lower file system |
| 410 | using the parent and the passed in cnp |
| 411 | 3. If that worked and we got a vp, then see if the vp is lowerrootvp. If |
| 412 | so we got a match |
| 413 | 4. Anything else results in ENOENT. |
| 414 | */ |
| 415 | error = null_get_lowerparent(null_mp->nullm_lowerrootvp, &ldvp, ap->a_context); |
| 416 | |
| 417 | if (error == 0) { |
| 418 | error = VNOP_LOOKUP(ldvp, &lvp, cnp, ap->a_context); |
| 419 | vnode_put(ldvp); |
| 420 | |
| 421 | if (error == 0) { |
| 422 | if (lvp == null_mp->nullm_lowerrootvp) { |
| 423 | /* always check the hashmap for a vnode for this, the root of the |
| 424 | * mirrored system */ |
| 425 | error = null_nodeget(mp, lvp, dvp, &vp, cnp, 0); |
| 426 | |
| 427 | if (error == 0 && null_mp->nullm_thirdcovervp == NULL) { |
| 428 | /* if nodeget succeeded then vp has an iocount*/ |
| 429 | null_mp->nullm_thirdcovervp = vp; |
| 430 | } |
| 431 | } else { |
| 432 | error = ENOENT; |
| 433 | } |
| 434 | vnode_put(lvp); |
| 435 | } |
| 436 | } |
| 437 | vnode_put(null_mp->nullm_lowerrootvp); |
| 438 | } |
| 439 | |
| 440 | end: |
| 441 | if (error == 0) { |
| 442 | *ap->a_vpp = vp; |
| 443 | } |
| 444 | return error; |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * We have to carry on the locking protocol on the null layer vnodes |
| 449 | * as we progress through the tree. We also have to enforce read-only |
| 450 | * if this layer is mounted read-only. |
| 451 | */ |
| 452 | static int |
| 453 | null_lookup(struct vnop_lookup_args * ap) |
| 454 | { |
| 455 | struct componentname * cnp = ap->a_cnp; |
| 456 | struct vnode * dvp = ap->a_dvp; |
| 457 | struct vnode *vp, *ldvp, *lvp; |
| 458 | struct mount * mp; |
| 459 | struct null_mount * null_mp; |
| 460 | int error; |
| 461 | |
| 462 | NULLFSDEBUG("%s parent: %p component: %.*s\n", __FUNCTION__, ap->a_dvp, cnp->cn_namelen, cnp->cn_nameptr); |
| 463 | |
| 464 | mp = vnode_mount(dvp); |
| 465 | /* rename and delete are not allowed. this is a read only file system */ |
| 466 | if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME || cnp->cn_nameiop == CREATE) { |
| 467 | return (EROFS); |
| 468 | } |
| 469 | null_mp = MOUNTTONULLMOUNT(mp); |
| 470 | |
| 471 | lck_mtx_lock(&null_mp->nullm_lock); |
| 472 | if (nullfs_isspecialvp(dvp)) { |
| 473 | error = null_special_lookup(ap); |
| 474 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 475 | return error; |
| 476 | } |
| 477 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 478 | |
| 479 | // . and .. handling |
| 480 | if (cnp->cn_nameptr[0] == '.') { |
| 481 | if (cnp->cn_namelen == 1) { |
| 482 | vp = dvp; |
| 483 | } else if (cnp->cn_namelen == 2 && cnp->cn_nameptr[1] == '.') { |
| 484 | /* mount point crossing is handled in null_special_lookup */ |
| 485 | vp = vnode_parent(dvp); |
| 486 | } else { |
| 487 | goto notdot; |
| 488 | } |
| 489 | |
| 490 | error = vp ? vnode_get(vp) : ENOENT; |
| 491 | |
| 492 | if (error == 0) { |
| 493 | *ap->a_vpp = vp; |
| 494 | } |
| 495 | |
| 496 | return error; |
| 497 | } |
| 498 | |
| 499 | notdot: |
| 500 | ldvp = NULLVPTOLOWERVP(dvp); |
| 501 | vp = lvp = NULL; |
| 502 | |
| 503 | /* |
| 504 | * Hold ldvp. The reference on it, owned by dvp, is lost in |
| 505 | * case of dvp reclamation. |
| 506 | */ |
| 507 | error = vnode_getwithref(ldvp); |
| 508 | if (error) { |
| 509 | return error; |
| 510 | } |
| 511 | |
| 512 | error = VNOP_LOOKUP(ldvp, &lvp, cnp, ap->a_context); |
| 513 | |
| 514 | vnode_put(ldvp); |
| 515 | |
| 516 | if ((error == 0 || error == EJUSTRETURN) && lvp != NULL) { |
| 517 | if (ldvp == lvp) { |
| 518 | vp = dvp; |
| 519 | error = vnode_get(vp); |
| 520 | } else { |
| 521 | error = null_nodeget(mp, lvp, dvp, &vp, cnp, 0); |
| 522 | } |
| 523 | if (error == 0) { |
| 524 | *ap->a_vpp = vp; |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | /* if we got lvp, drop the iocount from VNOP_LOOKUP */ |
| 529 | if (lvp != NULL) { |
| 530 | vnode_put(lvp); |
| 531 | } |
| 532 | |
| 533 | return (error); |
| 534 | } |
| 535 | |
| 536 | /* |
| 537 | * Don't think this needs to do anything |
| 538 | */ |
| 539 | static int |
| 540 | null_inactive(__unused struct vnop_inactive_args * ap) |
| 541 | { |
| 542 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 543 | |
| 544 | return (0); |
| 545 | } |
| 546 | |
| 547 | static int |
| 548 | null_reclaim(struct vnop_reclaim_args * ap) |
| 549 | { |
| 550 | struct vnode * vp; |
| 551 | struct null_node * xp; |
| 552 | struct vnode * lowervp; |
| 553 | struct null_mount * null_mp = MOUNTTONULLMOUNT(vnode_mount(ap->a_vp)); |
| 554 | |
| 555 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 556 | |
| 557 | vp = ap->a_vp; |
| 558 | |
| 559 | xp = VTONULL(vp); |
| 560 | lowervp = xp->null_lowervp; |
| 561 | |
| 562 | lck_mtx_lock(&null_mp->nullm_lock); |
| 563 | |
| 564 | vnode_removefsref(vp); |
| 565 | |
| 566 | if (lowervp != NULL) { |
| 567 | /* root and second don't have a lowervp, so nothing to release and nothing |
| 568 | * got hashed */ |
| 569 | if (xp->null_flags & NULL_FLAG_HASHED) { |
| 570 | /* only call this if we actually made it into the hash list. reclaim gets |
| 571 | called also to |
| 572 | clean up a vnode that got created when it didn't need to under race |
| 573 | conditions */ |
| 574 | null_hashrem(xp); |
| 575 | } |
| 576 | vnode_getwithref(lowervp); |
| 577 | vnode_rele(lowervp); |
| 578 | vnode_put(lowervp); |
| 579 | } |
| 580 | |
| 581 | if (vp == null_mp->nullm_rootvp) { |
| 582 | null_mp->nullm_rootvp = NULL; |
| 583 | } else if (vp == null_mp->nullm_secondvp) { |
| 584 | null_mp->nullm_secondvp = NULL; |
| 585 | } else if (vp == null_mp->nullm_thirdcovervp) { |
| 586 | null_mp->nullm_thirdcovervp = NULL; |
| 587 | } |
| 588 | |
| 589 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 590 | |
| 591 | cache_purge(vp); |
| 592 | vnode_clearfsnode(vp); |
| 593 | |
| 594 | FREE(xp, M_TEMP); |
| 595 | |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | #define DIRENT_SZ(dp) ((sizeof(struct dirent) - NAME_MAX) + (((dp)->d_namlen + 1 + 3) & ~3)) |
| 600 | |
| 601 | static int |
| 602 | store_entry_special(ino_t ino, const char * name, struct uio * uio) |
| 603 | { |
| 604 | struct dirent e; |
| 605 | size_t namelen = strlen(name); |
| 606 | int error = EINVAL; |
| 607 | |
| 608 | if (namelen + 1 <= NAME_MAX) { |
| 609 | memset(&e, 0, sizeof(e)); |
| 610 | |
| 611 | e.d_ino = ino; |
| 612 | e.d_type = DT_DIR; |
| 613 | |
| 614 | e.d_namlen = namelen; /* don't include NUL */ |
| 615 | e.d_reclen = DIRENT_SZ(&e); |
| 616 | if (uio_resid(uio) >= e.d_reclen) { |
| 617 | strlcpy(e.d_name, name, NAME_MAX); |
| 618 | error = uiomove((caddr_t)&e, e.d_reclen, uio); |
| 619 | } else { |
| 620 | error = EMSGSIZE; |
| 621 | } |
| 622 | } |
| 623 | return error; |
| 624 | } |
| 625 | |
| 626 | static int |
| 627 | nullfs_special_readdir(struct vnop_readdir_args * ap) |
| 628 | { |
| 629 | struct vnode * vp = ap->a_vp; |
| 630 | struct uio * uio = ap->a_uio; |
| 631 | struct null_mount * null_mp = MOUNTTONULLMOUNT(vnode_mount(vp)); |
| 632 | off_t offset = uio_offset(uio); |
| 633 | int error = ERANGE; |
| 634 | int items = 0; |
| 635 | ino_t ino = 0; |
| 636 | const char * name = NULL; |
| 637 | |
| 638 | if (ap->a_flags & (VNODE_READDIR_EXTENDED | VNODE_READDIR_REQSEEKOFF)) |
| 639 | return (EINVAL); |
| 640 | |
| 641 | if (offset == 0) { |
| 642 | /* . case */ |
| 643 | if (vp == null_mp->nullm_rootvp) { |
| 644 | ino = NULL_ROOT_INO; |
| 645 | } else /* only get here if vp matches nullm_rootvp or nullm_secondvp */ |
| 646 | { |
| 647 | ino = NULL_SECOND_INO; |
| 648 | } |
| 649 | error = store_entry_special(ino, ".", uio); |
| 650 | if (error) { |
| 651 | goto out; |
| 652 | } |
| 653 | offset++; |
| 654 | items++; |
| 655 | } |
| 656 | if (offset == 1) { |
| 657 | /* .. case */ |
| 658 | /* only get here if vp matches nullm_rootvp or nullm_secondvp */ |
| 659 | ino = NULL_ROOT_INO; |
| 660 | |
| 661 | error = store_entry_special(ino, "..", uio); |
| 662 | if (error) { |
| 663 | goto out; |
| 664 | } |
| 665 | offset++; |
| 666 | items++; |
| 667 | } |
| 668 | if (offset == 2) { |
| 669 | /* the directory case */ |
| 670 | if (vp == null_mp->nullm_rootvp) { |
| 671 | ino = NULL_SECOND_INO; |
| 672 | name = "d"; |
| 673 | } else /* only get here if vp matches nullm_rootvp or nullm_secondvp */ |
| 674 | { |
| 675 | ino = NULL_THIRD_INO; |
| 676 | if (vnode_getwithvid(null_mp->nullm_lowerrootvp, null_mp->nullm_lowerrootvid)) { |
| 677 | /* In this case the lower file system has been ripped out from under us, |
| 678 | but we don't want to error out |
| 679 | Instead we just want d to look empty. */ |
| 680 | error = 0; |
| 681 | goto out; |
| 682 | } |
| 683 | name = vnode_getname_printable(null_mp->nullm_lowerrootvp); |
| 684 | } |
| 685 | error = store_entry_special(ino, name, uio); |
| 686 | |
| 687 | if (ino == NULL_THIRD_INO) { |
| 688 | vnode_putname_printable(name); |
| 689 | vnode_put(null_mp->nullm_lowerrootvp); |
| 690 | } |
| 691 | |
| 692 | if (error) { |
| 693 | goto out; |
| 694 | } |
| 695 | offset++; |
| 696 | items++; |
| 697 | } |
| 698 | |
| 699 | out: |
| 700 | if (error == EMSGSIZE) { |
| 701 | error = 0; /* return success if we ran out of space, but we wanted to make |
| 702 | sure that we didn't update offset and items incorrectly */ |
| 703 | } |
| 704 | uio_setoffset(uio, offset); |
| 705 | if (ap->a_numdirent) { |
| 706 | *ap->a_numdirent = items; |
| 707 | } |
| 708 | return error; |
| 709 | } |
| 710 | |
| 711 | static int |
| 712 | nullfs_readdir(struct vnop_readdir_args * ap) |
| 713 | { |
| 714 | struct vnode *vp, *lvp; |
| 715 | int error; |
| 716 | struct null_mount * null_mp = MOUNTTONULLMOUNT(vnode_mount(ap->a_vp)); |
| 717 | |
| 718 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 719 | /* assumption is that any vp that comes through here had to go through lookup |
| 720 | */ |
| 721 | |
| 722 | lck_mtx_lock(&null_mp->nullm_lock); |
| 723 | if (nullfs_isspecialvp(ap->a_vp)) { |
| 724 | error = nullfs_special_readdir(ap); |
| 725 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 726 | return error; |
| 727 | } |
| 728 | lck_mtx_unlock(&null_mp->nullm_lock); |
| 729 | |
| 730 | vp = ap->a_vp; |
| 731 | lvp = NULLVPTOLOWERVP(vp); |
| 732 | error = vnode_getwithref(lvp); |
| 733 | if (error == 0) { |
| 734 | error = VNOP_READDIR(lvp, ap->a_uio, ap->a_flags, ap->a_eofflag, ap->a_numdirent, ap->a_context); |
| 735 | vnode_put(lvp); |
| 736 | } |
| 737 | |
| 738 | return error; |
| 739 | } |
| 740 | |
| 741 | static int |
| 742 | nullfs_readlink(struct vnop_readlink_args * ap) |
| 743 | { |
| 744 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 745 | int error; |
| 746 | struct vnode *vp, *lvp; |
| 747 | |
| 748 | if (nullfs_checkspecialvp(ap->a_vp)) { |
| 749 | return ENOTSUP; /* the special vnodes aren't links */ |
| 750 | } |
| 751 | |
| 752 | vp = ap->a_vp; |
| 753 | lvp = NULLVPTOLOWERVP(vp); |
| 754 | |
| 755 | error = vnode_getwithref(lvp); |
| 756 | if (error == 0) { |
| 757 | error = VNOP_READLINK(lvp, ap->a_uio, ap->a_context); |
| 758 | vnode_put(lvp); |
| 759 | |
| 760 | if (error) { |
| 761 | NULLFSDEBUG("readlink failed: %d\n", error); |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | return error; |
| 766 | } |
| 767 | |
| 768 | static int |
| 769 | nullfs_pathconf(__unused struct vnop_pathconf_args * args) |
| 770 | { |
| 771 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 772 | return EINVAL; |
| 773 | } |
| 774 | |
| 775 | static int |
| 776 | nullfs_fsync(__unused struct vnop_fsync_args * args) |
| 777 | { |
| 778 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | static int |
| 783 | nullfs_mmap(struct vnop_mmap_args * args) |
| 784 | { |
| 785 | int error; |
| 786 | struct vnode *vp, *lvp; |
| 787 | |
| 788 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 789 | |
| 790 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 791 | return 0; /* nothing extra needed */ |
| 792 | } |
| 793 | |
| 794 | vp = args->a_vp; |
| 795 | lvp = NULLVPTOLOWERVP(vp); |
| 796 | error = vnode_getwithref(lvp); |
| 797 | if (error == 0) { |
| 798 | error = VNOP_MMAP(lvp, args->a_fflags, args->a_context); |
| 799 | vnode_put(lvp); |
| 800 | } |
| 801 | |
| 802 | return error; |
| 803 | } |
| 804 | |
| 805 | static int |
| 806 | nullfs_mnomap(struct vnop_mnomap_args * args) |
| 807 | { |
| 808 | int error; |
| 809 | struct vnode *vp, *lvp; |
| 810 | |
| 811 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 812 | |
| 813 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 814 | return 0; /* nothing extra needed */ |
| 815 | } |
| 816 | |
| 817 | vp = args->a_vp; |
| 818 | lvp = NULLVPTOLOWERVP(vp); |
| 819 | error = vnode_getwithref(lvp); |
| 820 | if (error == 0) { |
| 821 | error = VNOP_MNOMAP(lvp, args->a_context); |
| 822 | vnode_put(lvp); |
| 823 | } |
| 824 | |
| 825 | return error; |
| 826 | } |
| 827 | |
| 828 | static int |
| 829 | nullfs_getxattr(struct vnop_getxattr_args * args) |
| 830 | { |
| 831 | int error; |
| 832 | struct vnode *vp, *lvp; |
| 833 | |
| 834 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 835 | |
| 836 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 837 | return 0; /* nothing extra needed */ |
| 838 | } |
| 839 | |
| 840 | vp = args->a_vp; |
| 841 | lvp = NULLVPTOLOWERVP(vp); |
| 842 | error = vnode_getwithref(lvp); |
| 843 | if (error == 0) { |
| 844 | error = VNOP_GETXATTR(lvp, args->a_name, args->a_uio, args->a_size, args->a_options, args->a_context); |
| 845 | vnode_put(lvp); |
| 846 | } |
| 847 | |
| 848 | return error; |
| 849 | } |
| 850 | |
| 851 | static int |
| 852 | nullfs_listxattr(struct vnop_listxattr_args * args) |
| 853 | { |
| 854 | int error; |
| 855 | struct vnode *vp, *lvp; |
| 856 | |
| 857 | NULLFSDEBUG("%s %p\n", __FUNCTION__, args->a_vp); |
| 858 | |
| 859 | if (nullfs_checkspecialvp(args->a_vp)) { |
| 860 | return 0; /* nothing extra needed */ |
| 861 | } |
| 862 | |
| 863 | vp = args->a_vp; |
| 864 | lvp = NULLVPTOLOWERVP(vp); |
| 865 | error = vnode_getwithref(lvp); |
| 866 | if (error == 0) { |
| 867 | error = VNOP_LISTXATTR(lvp, args->a_uio, args->a_size, args->a_options, args->a_context); |
| 868 | vnode_put(lvp); |
| 869 | } |
| 870 | |
| 871 | return error; |
| 872 | } |
| 873 | |
| 874 | /* relies on v1 paging */ |
| 875 | static int |
| 876 | nullfs_pagein(struct vnop_pagein_args * ap) |
| 877 | { |
| 878 | int error = EIO; |
| 879 | struct vnode *vp, *lvp; |
| 880 | |
| 881 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 882 | |
| 883 | vp = ap->a_vp; |
| 884 | lvp = NULLVPTOLOWERVP(vp); |
| 885 | |
| 886 | if (vnode_vtype(vp) != VREG) { |
| 887 | return ENOTSUP; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * Ask VM/UBC/VFS to do our bidding |
| 892 | */ |
| 893 | if (vnode_getwithvid(lvp, NULLVPTOLOWERVID(vp)) == 0) { |
| 894 | vm_offset_t ioaddr; |
| 895 | uio_t auio; |
| 896 | kern_return_t kret; |
| 897 | off_t bytes_to_commit; |
| 898 | off_t lowersize; |
| 899 | upl_t upl = ap->a_pl; |
| 900 | user_ssize_t bytes_remaining = 0; |
| 901 | |
| 902 | auio = uio_create(1, ap->a_f_offset, UIO_SYSSPACE, UIO_READ); |
| 903 | if (auio == NULL) { |
| 904 | error = EIO; |
| 905 | goto exit_no_unmap; |
| 906 | } |
| 907 | |
| 908 | kret = ubc_upl_map(upl, &ioaddr); |
| 909 | if (KERN_SUCCESS != kret) { |
| 910 | panic("nullfs_pagein: ubc_upl_map() failed with (%d)", kret); |
| 911 | } |
| 912 | |
| 913 | ioaddr += ap->a_pl_offset; |
| 914 | |
| 915 | error = uio_addiov(auio, (user_addr_t)ioaddr, ap->a_size); |
| 916 | if (error) { |
| 917 | goto exit; |
| 918 | } |
| 919 | |
| 920 | lowersize = ubc_getsize(lvp); |
| 921 | if (lowersize != ubc_getsize(vp)) { |
| 922 | (void)ubc_setsize(vp, lowersize); /* ignore failures, nothing can be done */ |
| 923 | } |
| 924 | |
| 925 | error = VNOP_READ(lvp, auio, ((ap->a_flags & UPL_IOSYNC) ? IO_SYNC : 0), ap->a_context); |
| 926 | |
| 927 | bytes_remaining = uio_resid(auio); |
| 928 | if (bytes_remaining > 0 && bytes_remaining <= (user_ssize_t)ap->a_size) |
| 929 | { |
| 930 | /* zero bytes that weren't read in to the upl */ |
| 931 | bzero((void*)((uintptr_t)(ioaddr + ap->a_size - bytes_remaining)), (size_t) bytes_remaining); |
| 932 | } |
| 933 | |
| 934 | exit: |
| 935 | kret = ubc_upl_unmap(upl); |
| 936 | if (KERN_SUCCESS != kret) { |
| 937 | panic("nullfs_pagein: ubc_upl_unmap() failed with (%d)", kret); |
| 938 | } |
| 939 | |
| 940 | if (auio != NULL) { |
| 941 | uio_free(auio); |
| 942 | } |
| 943 | |
| 944 | exit_no_unmap: |
| 945 | if ((ap->a_flags & UPL_NOCOMMIT) == 0) { |
| 946 | if (!error && (bytes_remaining >= 0) && (bytes_remaining <= (user_ssize_t)ap->a_size)) { |
| 947 | /* only commit what was read in (page aligned)*/ |
| 948 | bytes_to_commit = ap->a_size - bytes_remaining; |
| 949 | if (bytes_to_commit) |
| 950 | { |
| 951 | /* need to make sure bytes_to_commit and byte_remaining are page aligned before calling ubc_upl_commit_range*/ |
| 952 | if (bytes_to_commit & PAGE_MASK) |
| 953 | { |
| 954 | bytes_to_commit = (bytes_to_commit & (~PAGE_MASK)) + (PAGE_MASK + 1); |
| 955 | assert(bytes_to_commit <= (off_t)ap->a_size); |
| 956 | |
| 957 | bytes_remaining = ap->a_size - bytes_to_commit; |
| 958 | } |
| 959 | ubc_upl_commit_range(upl, ap->a_pl_offset, (upl_size_t)bytes_to_commit, UPL_COMMIT_FREE_ON_EMPTY); |
| 960 | } |
| 961 | |
| 962 | /* abort anything thats left */ |
| 963 | if (bytes_remaining) { |
| 964 | ubc_upl_abort_range(upl, ap->a_pl_offset + bytes_to_commit, (upl_size_t)bytes_remaining, UPL_ABORT_ERROR | UPL_ABORT_FREE_ON_EMPTY); |
| 965 | } |
| 966 | } else { |
| 967 | ubc_upl_abort_range(upl, ap->a_pl_offset, (upl_size_t)ap->a_size, UPL_ABORT_ERROR | UPL_ABORT_FREE_ON_EMPTY); |
| 968 | } |
| 969 | } |
| 970 | vnode_put(lvp); |
| 971 | } else if((ap->a_flags & UPL_NOCOMMIT) == 0) { |
| 972 | ubc_upl_abort_range(ap->a_pl, ap->a_pl_offset, (upl_size_t)ap->a_size, UPL_ABORT_ERROR | UPL_ABORT_FREE_ON_EMPTY); |
| 973 | } |
| 974 | return error; |
| 975 | } |
| 976 | |
| 977 | static int |
| 978 | nullfs_read(struct vnop_read_args * ap) |
| 979 | { |
| 980 | int error = EIO; |
| 981 | |
| 982 | struct vnode *vp, *lvp; |
| 983 | |
| 984 | NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp); |
| 985 | |
| 986 | if (nullfs_checkspecialvp(ap->a_vp)) { |
| 987 | return ENOTSUP; /* the special vnodes can't be read */ |
| 988 | } |
| 989 | |
| 990 | vp = ap->a_vp; |
| 991 | lvp = NULLVPTOLOWERVP(vp); |
| 992 | |
| 993 | /* |
| 994 | * First some house keeping |
| 995 | */ |
| 996 | if (vnode_getwithvid(lvp, NULLVPTOLOWERVID(vp)) == 0) { |
| 997 | if (!vnode_isreg(lvp) && !vnode_islnk(lvp)) { |
| 998 | error = EPERM; |
| 999 | goto end; |
| 1000 | } |
| 1001 | |
| 1002 | if (uio_resid(ap->a_uio) == 0) { |
| 1003 | error = 0; |
| 1004 | goto end; |
| 1005 | } |
| 1006 | |
| 1007 | /* |
| 1008 | * Now ask VM/UBC/VFS to do our bidding |
| 1009 | */ |
| 1010 | |
| 1011 | error = VNOP_READ(lvp, ap->a_uio, ap->a_ioflag, ap->a_context); |
| 1012 | if (error) { |
| 1013 | NULLFSDEBUG("VNOP_READ failed: %d\n", error); |
| 1014 | } |
| 1015 | end: |
| 1016 | vnode_put(lvp); |
| 1017 | } |
| 1018 | return error; |
| 1019 | } |
| 1020 | |
| 1021 | /* |
| 1022 | * Global vfs data structures |
| 1023 | */ |
| 1024 | |
| 1025 | static struct vnodeopv_entry_desc nullfs_vnodeop_entries[] = { |
| 1026 | {&vnop_default_desc, (vop_t)nullfs_default}, {&vnop_getattr_desc, (vop_t)nullfs_getattr}, |
| 1027 | {&vnop_open_desc, (vop_t)nullfs_open}, {&vnop_close_desc, (vop_t)nullfs_close}, |
| 1028 | {&vnop_inactive_desc, (vop_t)null_inactive}, {&vnop_reclaim_desc, (vop_t)null_reclaim}, |
| 1029 | {&vnop_lookup_desc, (vop_t)null_lookup}, {&vnop_readdir_desc, (vop_t)nullfs_readdir}, |
| 1030 | {&vnop_readlink_desc, (vop_t)nullfs_readlink}, {&vnop_pathconf_desc, (vop_t)nullfs_pathconf}, |
| 1031 | {&vnop_fsync_desc, (vop_t)nullfs_fsync}, {&vnop_mmap_desc, (vop_t)nullfs_mmap}, |
| 1032 | {&vnop_mnomap_desc, (vop_t)nullfs_mnomap}, {&vnop_getxattr_desc, (vop_t)nullfs_getxattr}, |
| 1033 | {&vnop_pagein_desc, (vop_t)nullfs_pagein}, {&vnop_read_desc, (vop_t)nullfs_read}, |
| 1034 | {&vnop_listxattr_desc, (vop_t)nullfs_listxattr}, {NULL, NULL}, |
| 1035 | }; |
| 1036 | |
| 1037 | struct vnodeopv_desc nullfs_vnodeop_opv_desc = {&nullfs_vnodeop_p, nullfs_vnodeop_entries}; |