| 1 | /* $NetBSD: vfs_xattr.c,v 1.33 2014/09/05 09:20:59 matt Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2005, 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe. |
| 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Copyright (c) 1989, 1993 |
| 34 | * The Regents of the University of California. All rights reserved. |
| 35 | * (c) UNIX System Laboratories, Inc. |
| 36 | * All or some portions of this file are derived from material licensed |
| 37 | * to the University of California by American Telephone and Telegraph |
| 38 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 39 | * the permission of UNIX System Laboratories, Inc. |
| 40 | * |
| 41 | * Redistribution and use in source and binary forms, with or without |
| 42 | * modification, are permitted provided that the following conditions |
| 43 | * are met: |
| 44 | * 1. Redistributions of source code must retain the above copyright |
| 45 | * notice, this list of conditions and the following disclaimer. |
| 46 | * 2. Redistributions in binary form must reproduce the above copyright |
| 47 | * notice, this list of conditions and the following disclaimer in the |
| 48 | * documentation and/or other materials provided with the distribution. |
| 49 | * 3. Neither the name of the University nor the names of its contributors |
| 50 | * may be used to endorse or promote products derived from this software |
| 51 | * without specific prior written permission. |
| 52 | * |
| 53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 63 | * SUCH DAMAGE. |
| 64 | */ |
| 65 | |
| 66 | /* |
| 67 | * VFS extended attribute support. |
| 68 | */ |
| 69 | |
| 70 | #include <sys/cdefs.h> |
| 71 | __KERNEL_RCSID(0, "$NetBSD: vfs_xattr.c,v 1.33 2014/09/05 09:20:59 matt Exp $" ); |
| 72 | |
| 73 | #include <sys/param.h> |
| 74 | #include <sys/systm.h> |
| 75 | #include <sys/namei.h> |
| 76 | #include <sys/filedesc.h> |
| 77 | #include <sys/kernel.h> |
| 78 | #include <sys/file.h> |
| 79 | #include <sys/vnode.h> |
| 80 | #include <sys/mount.h> |
| 81 | #include <sys/proc.h> |
| 82 | #include <sys/uio.h> |
| 83 | #include <sys/extattr.h> |
| 84 | #include <sys/xattr.h> |
| 85 | #include <sys/sysctl.h> |
| 86 | #include <sys/syscallargs.h> |
| 87 | #include <sys/kauth.h> |
| 88 | #include <sys/ktrace.h> |
| 89 | |
| 90 | #include <miscfs/genfs/genfs.h> |
| 91 | |
| 92 | /* |
| 93 | * Credential check based on process requesting service, and per-attribute |
| 94 | * permissions. |
| 95 | * |
| 96 | * NOTE: Vnode must be locked. |
| 97 | */ |
| 98 | int |
| 99 | extattr_check_cred(struct vnode *vp, const char *attr, kauth_cred_t cred, |
| 100 | int access) |
| 101 | { |
| 102 | |
| 103 | if (cred == NOCRED) |
| 104 | return (0); |
| 105 | |
| 106 | return kauth_authorize_vnode(cred, kauth_extattr_action(access), vp, |
| 107 | NULL, genfs_can_extattr(cred, access, vp, attr)); |
| 108 | } |
| 109 | |
| 110 | /* |
| 111 | * Default vfs_extattrctl routine for file systems that do not support |
| 112 | * it. |
| 113 | */ |
| 114 | /*ARGSUSED*/ |
| 115 | int |
| 116 | vfs_stdextattrctl(struct mount *mp, int cmt, struct vnode *vp, |
| 117 | int attrnamespace, const char *attrname) |
| 118 | { |
| 119 | |
| 120 | if (vp != NULL) |
| 121 | VOP_UNLOCK(vp); |
| 122 | return (EOPNOTSUPP); |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Push extended attribute configuration information into the file |
| 127 | * system. |
| 128 | * |
| 129 | * NOTE: Not all file systems that support extended attributes will |
| 130 | * require the use of this system call. |
| 131 | */ |
| 132 | int |
| 133 | sys_extattrctl(struct lwp *l, const struct sys_extattrctl_args *uap, register_t *retval) |
| 134 | { |
| 135 | /* { |
| 136 | syscallarg(const char *) path; |
| 137 | syscallarg(int) cmd; |
| 138 | syscallarg(const char *) filename; |
| 139 | syscallarg(int) attrnamespace; |
| 140 | syscallarg(const char *) attrname; |
| 141 | } */ |
| 142 | struct vnode *path_vp, *file_vp; |
| 143 | struct pathbuf *file_pb; |
| 144 | struct nameidata file_nd; |
| 145 | char attrname[EXTATTR_MAXNAMELEN]; |
| 146 | int error; |
| 147 | |
| 148 | if (SCARG(uap, attrname) != NULL) { |
| 149 | error = copyinstr(SCARG(uap, attrname), attrname, |
| 150 | sizeof(attrname), NULL); |
| 151 | if (error) |
| 152 | return (error); |
| 153 | } |
| 154 | |
| 155 | error = namei_simple_user(SCARG(uap, path), |
| 156 | NSM_FOLLOW_NOEMULROOT, &path_vp); |
| 157 | if (error) { |
| 158 | return (error); |
| 159 | } |
| 160 | |
| 161 | file_vp = NULL; |
| 162 | if (SCARG(uap, filename) != NULL) { |
| 163 | error = pathbuf_copyin(SCARG(uap, filename), &file_pb); |
| 164 | if (error) { |
| 165 | vrele(path_vp); |
| 166 | return (error); |
| 167 | } |
| 168 | NDINIT(&file_nd, LOOKUP, FOLLOW | LOCKLEAF, file_pb); |
| 169 | error = namei(&file_nd); |
| 170 | if (error) { |
| 171 | pathbuf_destroy(file_pb); |
| 172 | vrele(path_vp); |
| 173 | return (error); |
| 174 | } |
| 175 | file_vp = file_nd.ni_vp; |
| 176 | pathbuf_destroy(file_pb); |
| 177 | } |
| 178 | |
| 179 | error = VFS_EXTATTRCTL(path_vp->v_mount, SCARG(uap, cmd), file_vp, |
| 180 | SCARG(uap, attrnamespace), |
| 181 | SCARG(uap, attrname) != NULL ? attrname : NULL); |
| 182 | |
| 183 | if (file_vp != NULL) |
| 184 | vrele(file_vp); |
| 185 | vrele(path_vp); |
| 186 | |
| 187 | return (error); |
| 188 | } |
| 189 | |
| 190 | /***************************************************************************** |
| 191 | * Internal routines to manipulate file system extended attributes: |
| 192 | * - set |
| 193 | * - get |
| 194 | * - delete |
| 195 | * - list |
| 196 | *****************************************************************************/ |
| 197 | |
| 198 | /* |
| 199 | * extattr_set_vp: |
| 200 | * |
| 201 | * Set a named extended attribute on a file or directory. |
| 202 | */ |
| 203 | static int |
| 204 | extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, |
| 205 | const void *data, size_t nbytes, struct lwp *l, register_t *retval, |
| 206 | int flag) |
| 207 | { |
| 208 | struct uio auio; |
| 209 | struct iovec aiov; |
| 210 | ssize_t cnt; |
| 211 | int error; |
| 212 | |
| 213 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 214 | |
| 215 | if (flag) { |
| 216 | size_t attrlen; |
| 217 | |
| 218 | error = VOP_GETEXTATTR(vp, attrnamespace, attrname, NULL, |
| 219 | &attrlen, l->l_cred); |
| 220 | |
| 221 | switch (error) { |
| 222 | case ENODATA: |
| 223 | if (flag & XATTR_REPLACE) |
| 224 | goto done; |
| 225 | break; |
| 226 | case 0: |
| 227 | if (flag & XATTR_CREATE) { |
| 228 | error = EEXIST; |
| 229 | goto done; |
| 230 | } |
| 231 | break; |
| 232 | default: |
| 233 | goto done; |
| 234 | break; |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | aiov.iov_base = __UNCONST(data); /* XXXUNCONST kills const */ |
| 239 | aiov.iov_len = nbytes; |
| 240 | auio.uio_iov = &aiov; |
| 241 | auio.uio_iovcnt = 1; |
| 242 | auio.uio_offset = 0; |
| 243 | if (nbytes > INT_MAX) { |
| 244 | error = EINVAL; |
| 245 | goto done; |
| 246 | } |
| 247 | auio.uio_resid = nbytes; |
| 248 | auio.uio_rw = UIO_WRITE; |
| 249 | KASSERT(l == curlwp); |
| 250 | auio.uio_vmspace = l->l_proc->p_vmspace; |
| 251 | cnt = nbytes; |
| 252 | |
| 253 | ktrkuser("xattr-name" , (void *)__UNCONST(attrname), strlen(attrname)); |
| 254 | ktrkuser("xattr-val" , __UNCONST(data), nbytes); |
| 255 | |
| 256 | error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, l->l_cred); |
| 257 | cnt -= auio.uio_resid; |
| 258 | retval[0] = cnt; |
| 259 | |
| 260 | done: |
| 261 | VOP_UNLOCK(vp); |
| 262 | return (error); |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * extattr_get_vp: |
| 267 | * |
| 268 | * Get a named extended attribute on a file or directory. |
| 269 | */ |
| 270 | static int |
| 271 | extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, |
| 272 | void *data, size_t nbytes, struct lwp *l, register_t *retval) |
| 273 | { |
| 274 | struct uio auio, *auiop; |
| 275 | struct iovec aiov; |
| 276 | ssize_t cnt; |
| 277 | size_t size, *sizep; |
| 278 | int error; |
| 279 | |
| 280 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 281 | |
| 282 | /* |
| 283 | * Slightly unusual semantics: if the user provides a NULL data |
| 284 | * pointer, they don't want to receive the data, just the maximum |
| 285 | * read length. |
| 286 | */ |
| 287 | auiop = NULL; |
| 288 | sizep = NULL; |
| 289 | cnt = 0; |
| 290 | if (data != NULL) { |
| 291 | aiov.iov_base = data; |
| 292 | aiov.iov_len = nbytes; |
| 293 | auio.uio_iov = &aiov; |
| 294 | auio.uio_offset = 0; |
| 295 | if (nbytes > INT_MAX) { |
| 296 | error = EINVAL; |
| 297 | goto done; |
| 298 | } |
| 299 | auio.uio_resid = nbytes; |
| 300 | auio.uio_rw = UIO_READ; |
| 301 | KASSERT(l == curlwp); |
| 302 | auio.uio_vmspace = l->l_proc->p_vmspace; |
| 303 | auiop = &auio; |
| 304 | cnt = nbytes; |
| 305 | } else |
| 306 | sizep = &size; |
| 307 | |
| 308 | ktrkuser("xattr-name" , (void *)__UNCONST(attrname), strlen(attrname)); |
| 309 | |
| 310 | error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, |
| 311 | l->l_cred); |
| 312 | |
| 313 | if (auiop != NULL) { |
| 314 | cnt -= auio.uio_resid; |
| 315 | retval[0] = cnt; |
| 316 | |
| 317 | ktrkuser("xattr-val" , data, cnt); |
| 318 | } else |
| 319 | retval[0] = size; |
| 320 | |
| 321 | done: |
| 322 | VOP_UNLOCK(vp); |
| 323 | return (error); |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * extattr_delete_vp: |
| 328 | * |
| 329 | * Delete a named extended attribute on a file or directory. |
| 330 | */ |
| 331 | static int |
| 332 | extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, |
| 333 | struct lwp *l) |
| 334 | { |
| 335 | int error; |
| 336 | |
| 337 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 338 | |
| 339 | ktrkuser("xattr-name" , (void *)__UNCONST(attrname), strlen(attrname)); |
| 340 | |
| 341 | error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, l->l_cred); |
| 342 | if (error == EOPNOTSUPP) |
| 343 | error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, |
| 344 | l->l_cred); |
| 345 | |
| 346 | VOP_UNLOCK(vp); |
| 347 | return (error); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * extattr_list_vp: |
| 352 | * |
| 353 | * Retrieve a list of extended attributes on a file or directory. |
| 354 | */ |
| 355 | static int |
| 356 | extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, |
| 357 | int flag, struct lwp *l, register_t *retval) |
| 358 | { |
| 359 | struct uio auio, *auiop; |
| 360 | size_t size, *sizep; |
| 361 | struct iovec aiov; |
| 362 | ssize_t cnt; |
| 363 | int error; |
| 364 | |
| 365 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 366 | |
| 367 | auiop = NULL; |
| 368 | sizep = NULL; |
| 369 | cnt = 0; |
| 370 | if (data != NULL) { |
| 371 | aiov.iov_base = data; |
| 372 | aiov.iov_len = nbytes; |
| 373 | auio.uio_iov = &aiov; |
| 374 | auio.uio_offset = 0; |
| 375 | if (nbytes > INT_MAX) { |
| 376 | error = EINVAL; |
| 377 | goto done; |
| 378 | } |
| 379 | auio.uio_resid = nbytes; |
| 380 | auio.uio_rw = UIO_READ; |
| 381 | KASSERT(l == curlwp); |
| 382 | auio.uio_vmspace = l->l_proc->p_vmspace; |
| 383 | auiop = &auio; |
| 384 | cnt = nbytes; |
| 385 | } else |
| 386 | sizep = &size; |
| 387 | |
| 388 | error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, |
| 389 | flag, l->l_cred); |
| 390 | |
| 391 | if (auiop != NULL) { |
| 392 | cnt -= auio.uio_resid; |
| 393 | retval[0] = cnt; |
| 394 | |
| 395 | ktrkuser("xattr-list" , data, cnt); |
| 396 | } else |
| 397 | retval[0] = size; |
| 398 | |
| 399 | done: |
| 400 | VOP_UNLOCK(vp); |
| 401 | return (error); |
| 402 | } |
| 403 | |
| 404 | /***************************************************************************** |
| 405 | * BSD <sys/extattr.h> API for file system extended attributes |
| 406 | *****************************************************************************/ |
| 407 | |
| 408 | int |
| 409 | sys_extattr_set_fd(struct lwp *l, const struct sys_extattr_set_fd_args *uap, register_t *retval) |
| 410 | { |
| 411 | /* { |
| 412 | syscallarg(int) fd; |
| 413 | syscallarg(int) attrnamespace; |
| 414 | syscallarg(const char *) attrname; |
| 415 | syscallarg(const void *) data; |
| 416 | syscallarg(size_t) nbytes; |
| 417 | } */ |
| 418 | struct file *fp; |
| 419 | struct vnode *vp; |
| 420 | char attrname[EXTATTR_MAXNAMELEN]; |
| 421 | int error; |
| 422 | |
| 423 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 424 | NULL); |
| 425 | if (error) |
| 426 | return (error); |
| 427 | |
| 428 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 429 | if (error) |
| 430 | return (error); |
| 431 | vp = fp->f_vnode; |
| 432 | |
| 433 | error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 434 | SCARG(uap, data), SCARG(uap, nbytes), l, retval, 0); |
| 435 | |
| 436 | fd_putfile(SCARG(uap, fd)); |
| 437 | return (error); |
| 438 | } |
| 439 | |
| 440 | int |
| 441 | sys_extattr_set_file(struct lwp *l, const struct sys_extattr_set_file_args *uap, register_t *retval) |
| 442 | { |
| 443 | /* { |
| 444 | syscallarg(const char *) path; |
| 445 | syscallarg(int) attrnamespace; |
| 446 | syscallarg(const char *) attrname; |
| 447 | syscallarg(const void *) data; |
| 448 | syscallarg(size_t) nbytes; |
| 449 | } */ |
| 450 | struct vnode *vp; |
| 451 | char attrname[EXTATTR_MAXNAMELEN]; |
| 452 | int error; |
| 453 | |
| 454 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 455 | NULL); |
| 456 | if (error) |
| 457 | return (error); |
| 458 | |
| 459 | error = namei_simple_user(SCARG(uap, path), |
| 460 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 461 | if (error) |
| 462 | return (error); |
| 463 | |
| 464 | error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 465 | SCARG(uap, data), SCARG(uap, nbytes), l, retval, 0); |
| 466 | |
| 467 | vrele(vp); |
| 468 | return (error); |
| 469 | } |
| 470 | |
| 471 | int |
| 472 | sys_extattr_set_link(struct lwp *l, const struct sys_extattr_set_link_args *uap, register_t *retval) |
| 473 | { |
| 474 | /* { |
| 475 | syscallarg(const char *) path; |
| 476 | syscallarg(int) attrnamespace; |
| 477 | syscallarg(const char *) attrname; |
| 478 | syscallarg(const void *) data; |
| 479 | syscallarg(size_t) nbytes; |
| 480 | } */ |
| 481 | struct vnode *vp; |
| 482 | char attrname[EXTATTR_MAXNAMELEN]; |
| 483 | int error; |
| 484 | |
| 485 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 486 | NULL); |
| 487 | if (error) |
| 488 | return (error); |
| 489 | |
| 490 | error = namei_simple_user(SCARG(uap, path), |
| 491 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 492 | if (error) |
| 493 | return (error); |
| 494 | |
| 495 | error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 496 | SCARG(uap, data), SCARG(uap, nbytes), l, retval, 0); |
| 497 | |
| 498 | vrele(vp); |
| 499 | return (error); |
| 500 | } |
| 501 | |
| 502 | int |
| 503 | sys_extattr_get_fd(struct lwp *l, const struct sys_extattr_get_fd_args *uap, register_t *retval) |
| 504 | { |
| 505 | /* { |
| 506 | syscallarg(int) fd; |
| 507 | syscallarg(int) attrnamespace; |
| 508 | syscallarg(const char *) attrname; |
| 509 | syscallarg(void *) data; |
| 510 | syscallarg(size_t) nbytes; |
| 511 | } */ |
| 512 | struct file *fp; |
| 513 | struct vnode *vp; |
| 514 | char attrname[EXTATTR_MAXNAMELEN]; |
| 515 | int error; |
| 516 | |
| 517 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 518 | NULL); |
| 519 | if (error) |
| 520 | return (error); |
| 521 | |
| 522 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 523 | if (error) |
| 524 | return (error); |
| 525 | vp = fp->f_vnode; |
| 526 | |
| 527 | error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 528 | SCARG(uap, data), SCARG(uap, nbytes), l, retval); |
| 529 | |
| 530 | fd_putfile(SCARG(uap, fd)); |
| 531 | return (error); |
| 532 | } |
| 533 | |
| 534 | int |
| 535 | sys_extattr_get_file(struct lwp *l, const struct sys_extattr_get_file_args *uap, register_t *retval) |
| 536 | { |
| 537 | /* { |
| 538 | syscallarg(const char *) path; |
| 539 | syscallarg(int) attrnamespace; |
| 540 | syscallarg(const char *) attrname; |
| 541 | syscallarg(void *) data; |
| 542 | syscallarg(size_t) nbytes; |
| 543 | } */ |
| 544 | struct vnode *vp; |
| 545 | char attrname[EXTATTR_MAXNAMELEN]; |
| 546 | int error; |
| 547 | |
| 548 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 549 | NULL); |
| 550 | if (error) |
| 551 | return (error); |
| 552 | |
| 553 | error = namei_simple_user(SCARG(uap, path), |
| 554 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 555 | if (error) |
| 556 | return (error); |
| 557 | |
| 558 | error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 559 | SCARG(uap, data), SCARG(uap, nbytes), l, retval); |
| 560 | |
| 561 | vrele(vp); |
| 562 | return (error); |
| 563 | } |
| 564 | |
| 565 | int |
| 566 | sys_extattr_get_link(struct lwp *l, const struct sys_extattr_get_link_args *uap, register_t *retval) |
| 567 | { |
| 568 | /* { |
| 569 | syscallarg(const char *) path; |
| 570 | syscallarg(int) attrnamespace; |
| 571 | syscallarg(const char *) attrname; |
| 572 | syscallarg(void *) data; |
| 573 | syscallarg(size_t) nbytes; |
| 574 | } */ |
| 575 | struct vnode *vp; |
| 576 | char attrname[EXTATTR_MAXNAMELEN]; |
| 577 | int error; |
| 578 | |
| 579 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 580 | NULL); |
| 581 | if (error) |
| 582 | return (error); |
| 583 | |
| 584 | error = namei_simple_user(SCARG(uap, path), |
| 585 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 586 | if (error) |
| 587 | return (error); |
| 588 | |
| 589 | error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, |
| 590 | SCARG(uap, data), SCARG(uap, nbytes), l, retval); |
| 591 | |
| 592 | vrele(vp); |
| 593 | return (error); |
| 594 | } |
| 595 | |
| 596 | int |
| 597 | sys_extattr_delete_fd(struct lwp *l, const struct sys_extattr_delete_fd_args *uap, register_t *retval) |
| 598 | { |
| 599 | /* { |
| 600 | syscallarg(int) fd; |
| 601 | syscallarg(int) attrnamespace; |
| 602 | syscallarg(const char *) attrname; |
| 603 | } */ |
| 604 | struct file *fp; |
| 605 | struct vnode *vp; |
| 606 | char attrname[EXTATTR_MAXNAMELEN]; |
| 607 | int error; |
| 608 | |
| 609 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 610 | NULL); |
| 611 | if (error) |
| 612 | return (error); |
| 613 | |
| 614 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 615 | if (error) |
| 616 | return (error); |
| 617 | vp = fp->f_vnode; |
| 618 | |
| 619 | error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l); |
| 620 | |
| 621 | fd_putfile(SCARG(uap, fd)); |
| 622 | return (error); |
| 623 | } |
| 624 | |
| 625 | int |
| 626 | sys_extattr_delete_file(struct lwp *l, const struct sys_extattr_delete_file_args *uap, register_t *retval) |
| 627 | { |
| 628 | /* { |
| 629 | syscallarg(const char *) path; |
| 630 | syscallarg(int) attrnamespace; |
| 631 | syscallarg(const char *) attrname; |
| 632 | } */ |
| 633 | struct vnode *vp; |
| 634 | char attrname[EXTATTR_MAXNAMELEN]; |
| 635 | int error; |
| 636 | |
| 637 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 638 | NULL); |
| 639 | if (error) |
| 640 | return (error); |
| 641 | |
| 642 | error = namei_simple_user(SCARG(uap, path), |
| 643 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 644 | if (error) |
| 645 | return (error); |
| 646 | |
| 647 | error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l); |
| 648 | |
| 649 | vrele(vp); |
| 650 | return (error); |
| 651 | } |
| 652 | |
| 653 | int |
| 654 | sys_extattr_delete_link(struct lwp *l, const struct sys_extattr_delete_link_args *uap, register_t *retval) |
| 655 | { |
| 656 | /* { |
| 657 | syscallarg(const char *) path; |
| 658 | syscallarg(int) attrnamespace; |
| 659 | syscallarg(const char *) attrname; |
| 660 | } */ |
| 661 | struct vnode *vp; |
| 662 | char attrname[EXTATTR_MAXNAMELEN]; |
| 663 | int error; |
| 664 | |
| 665 | error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), |
| 666 | NULL); |
| 667 | if (error) |
| 668 | return (error); |
| 669 | |
| 670 | error = namei_simple_user(SCARG(uap, path), |
| 671 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 672 | if (error) |
| 673 | return (error); |
| 674 | |
| 675 | error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l); |
| 676 | |
| 677 | vrele(vp); |
| 678 | return (error); |
| 679 | } |
| 680 | |
| 681 | int |
| 682 | sys_extattr_list_fd(struct lwp *l, const struct sys_extattr_list_fd_args *uap, register_t *retval) |
| 683 | { |
| 684 | /* { |
| 685 | syscallarg(int) fd; |
| 686 | syscallarg(int) attrnamespace; |
| 687 | syscallarg(void *) data; |
| 688 | syscallarg(size_t) nbytes; |
| 689 | } */ |
| 690 | struct file *fp; |
| 691 | struct vnode *vp; |
| 692 | int error; |
| 693 | |
| 694 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 695 | if (error) |
| 696 | return (error); |
| 697 | vp = fp->f_vnode; |
| 698 | |
| 699 | error = extattr_list_vp(vp, SCARG(uap, attrnamespace), |
| 700 | SCARG(uap, data), SCARG(uap, nbytes), |
| 701 | EXTATTR_LIST_LENPREFIX, l, retval); |
| 702 | |
| 703 | fd_putfile(SCARG(uap, fd)); |
| 704 | return (error); |
| 705 | } |
| 706 | |
| 707 | int |
| 708 | sys_extattr_list_file(struct lwp *l, const struct sys_extattr_list_file_args *uap, register_t *retval) |
| 709 | { |
| 710 | /* { |
| 711 | syscallarg(const char *) path; |
| 712 | syscallarg(int) attrnamespace; |
| 713 | syscallarg(void *) data; |
| 714 | syscallarg(size_t) nbytes; |
| 715 | } */ |
| 716 | struct vnode *vp; |
| 717 | int error; |
| 718 | |
| 719 | error = namei_simple_user(SCARG(uap, path), |
| 720 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 721 | if (error) |
| 722 | return (error); |
| 723 | |
| 724 | error = extattr_list_vp(vp, SCARG(uap, attrnamespace), |
| 725 | SCARG(uap, data), SCARG(uap, nbytes), |
| 726 | EXTATTR_LIST_LENPREFIX, l, retval); |
| 727 | |
| 728 | vrele(vp); |
| 729 | return (error); |
| 730 | } |
| 731 | |
| 732 | int |
| 733 | sys_extattr_list_link(struct lwp *l, const struct sys_extattr_list_link_args *uap, register_t *retval) |
| 734 | { |
| 735 | /* { |
| 736 | syscallarg(const char *) path; |
| 737 | syscallarg(int) attrnamespace; |
| 738 | syscallarg(void *) data; |
| 739 | syscallarg(size_t) nbytes; |
| 740 | } */ |
| 741 | struct vnode *vp; |
| 742 | int error; |
| 743 | |
| 744 | error = namei_simple_user(SCARG(uap, path), |
| 745 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 746 | if (error) |
| 747 | return (error); |
| 748 | |
| 749 | error = extattr_list_vp(vp, SCARG(uap, attrnamespace), |
| 750 | SCARG(uap, data), SCARG(uap, nbytes), |
| 751 | EXTATTR_LIST_LENPREFIX, l, retval); |
| 752 | |
| 753 | vrele(vp); |
| 754 | return (error); |
| 755 | } |
| 756 | |
| 757 | /***************************************************************************** |
| 758 | * Linux-compatible <sys/xattr.h> API for file system extended attributes |
| 759 | *****************************************************************************/ |
| 760 | |
| 761 | #define MATCH_NS(ns, key) (strncmp(ns, key, sizeof(ns) - 1) == 0) |
| 762 | static int |
| 763 | xattr_native(const char *key) { |
| 764 | if (MATCH_NS("system." , key)) |
| 765 | return EXTATTR_NAMESPACE_SYSTEM; |
| 766 | else if (MATCH_NS("user." , key)) |
| 767 | return EXTATTR_NAMESPACE_USER; |
| 768 | else if (MATCH_NS("security." , key)) |
| 769 | return EXTATTR_NAMESPACE_SYSTEM; |
| 770 | else if (MATCH_NS("trusted." , key)) |
| 771 | return EXTATTR_NAMESPACE_SYSTEM; |
| 772 | else |
| 773 | return EXTATTR_NAMESPACE_USER; |
| 774 | |
| 775 | } |
| 776 | #undef MATCH_NS |
| 777 | |
| 778 | #define XATTR_ERRNO(e) ((e) == EOPNOTSUPP ? ENOTSUP : (e)) |
| 779 | |
| 780 | int |
| 781 | sys_setxattr(struct lwp *l, const struct sys_setxattr_args *uap, register_t *retval) |
| 782 | { |
| 783 | /* { |
| 784 | syscallarg(const char *) path; |
| 785 | syscallarg(const char *) name; |
| 786 | syscallarg(void *) value; |
| 787 | syscallarg(size_t) size; |
| 788 | syscallarg(int) flags; |
| 789 | } */ |
| 790 | struct vnode *vp; |
| 791 | char attrname[XATTR_NAME_MAX]; |
| 792 | int attrnamespace; |
| 793 | register_t attrlen; |
| 794 | int error; |
| 795 | |
| 796 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 797 | NULL); |
| 798 | if (error) |
| 799 | goto out; |
| 800 | |
| 801 | error = namei_simple_user(SCARG(uap, path), |
| 802 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 803 | if (error) |
| 804 | goto out; |
| 805 | |
| 806 | attrnamespace = xattr_native(attrname); |
| 807 | |
| 808 | error = extattr_set_vp(vp, attrnamespace, |
| 809 | attrname, SCARG(uap, value), SCARG(uap, size), l, |
| 810 | &attrlen, SCARG(uap, flags)); |
| 811 | |
| 812 | vrele(vp); |
| 813 | out: |
| 814 | *retval = (error == 0) ? 0 : -1; |
| 815 | return (XATTR_ERRNO(error)); |
| 816 | } |
| 817 | |
| 818 | int |
| 819 | sys_lsetxattr(struct lwp *l, const struct sys_lsetxattr_args *uap, register_t *retval) |
| 820 | { |
| 821 | /* { |
| 822 | syscallarg(const char *) path; |
| 823 | syscallarg(const char *) name; |
| 824 | syscallarg(void *) value; |
| 825 | syscallarg(size_t) size; |
| 826 | syscallarg(int) flags; |
| 827 | } */ |
| 828 | struct vnode *vp; |
| 829 | char attrname[XATTR_NAME_MAX]; |
| 830 | int attrnamespace; |
| 831 | register_t attrlen; |
| 832 | int error; |
| 833 | |
| 834 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 835 | NULL); |
| 836 | if (error) |
| 837 | goto out; |
| 838 | |
| 839 | error = namei_simple_user(SCARG(uap, path), |
| 840 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 841 | if (error) |
| 842 | goto out; |
| 843 | |
| 844 | attrnamespace = xattr_native(attrname); |
| 845 | |
| 846 | error = extattr_set_vp(vp, attrnamespace, |
| 847 | attrname, SCARG(uap, value), SCARG(uap, size), l, |
| 848 | &attrlen, SCARG(uap, flags)); |
| 849 | |
| 850 | vrele(vp); |
| 851 | out: |
| 852 | *retval = (error == 0) ? 0 : -1; |
| 853 | return (XATTR_ERRNO(error)); |
| 854 | } |
| 855 | |
| 856 | int |
| 857 | sys_fsetxattr(struct lwp *l, const struct sys_fsetxattr_args *uap, register_t *retval) |
| 858 | { |
| 859 | /* { |
| 860 | syscallarg(int) fd; |
| 861 | syscallarg(const char *) name; |
| 862 | syscallarg(void *) value; |
| 863 | syscallarg(size_t) size; |
| 864 | syscallarg(int) flags; |
| 865 | } */ |
| 866 | struct file *fp; |
| 867 | struct vnode *vp; |
| 868 | char attrname[XATTR_NAME_MAX]; |
| 869 | int attrnamespace; |
| 870 | register_t attrlen; |
| 871 | int error; |
| 872 | |
| 873 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 874 | NULL); |
| 875 | if (error) |
| 876 | goto out; |
| 877 | |
| 878 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 879 | if (error) |
| 880 | goto out; |
| 881 | vp = fp->f_vnode; |
| 882 | |
| 883 | attrnamespace = xattr_native(attrname); |
| 884 | |
| 885 | error = extattr_set_vp(vp, attrnamespace, |
| 886 | attrname, SCARG(uap, value), SCARG(uap, size), l, |
| 887 | &attrlen, SCARG(uap, flags)); |
| 888 | |
| 889 | fd_putfile(SCARG(uap, fd)); |
| 890 | out: |
| 891 | *retval = (error == 0) ? 0 : -1; |
| 892 | return (XATTR_ERRNO(error)); |
| 893 | } |
| 894 | |
| 895 | int |
| 896 | sys_getxattr(struct lwp *l, const struct sys_getxattr_args *uap, register_t *retval) |
| 897 | { |
| 898 | /* { |
| 899 | syscallarg(const char *) path; |
| 900 | syscallarg(const char *) name; |
| 901 | syscallarg(void *) value; |
| 902 | syscallarg(size_t) size; |
| 903 | } */ |
| 904 | struct vnode *vp; |
| 905 | char attrname[XATTR_NAME_MAX]; |
| 906 | int attrnamespace; |
| 907 | int error; |
| 908 | |
| 909 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 910 | NULL); |
| 911 | if (error) |
| 912 | return (error); |
| 913 | |
| 914 | error = namei_simple_user(SCARG(uap, path), |
| 915 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 916 | if (error) |
| 917 | return (error); |
| 918 | |
| 919 | attrnamespace = xattr_native(attrname); |
| 920 | |
| 921 | error = extattr_get_vp(vp, attrnamespace, |
| 922 | attrname, SCARG(uap, value), SCARG(uap, size), l, retval); |
| 923 | |
| 924 | vrele(vp); |
| 925 | return (XATTR_ERRNO(error)); |
| 926 | } |
| 927 | |
| 928 | int |
| 929 | sys_lgetxattr(struct lwp *l, const struct sys_lgetxattr_args *uap, register_t *retval) |
| 930 | { |
| 931 | /* { |
| 932 | syscallarg(const char *) path; |
| 933 | syscallarg(const char *) name; |
| 934 | syscallarg(void *) value; |
| 935 | syscallarg(size_t) size; |
| 936 | } */ |
| 937 | struct vnode *vp; |
| 938 | char attrname[XATTR_NAME_MAX]; |
| 939 | int attrnamespace; |
| 940 | int error; |
| 941 | |
| 942 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 943 | NULL); |
| 944 | if (error) |
| 945 | return (error); |
| 946 | |
| 947 | error = namei_simple_user(SCARG(uap, path), |
| 948 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 949 | if (error) |
| 950 | return (error); |
| 951 | |
| 952 | attrnamespace = xattr_native(attrname); |
| 953 | |
| 954 | error = extattr_get_vp(vp, attrnamespace, |
| 955 | attrname, SCARG(uap, value), SCARG(uap, size), l, retval); |
| 956 | |
| 957 | vrele(vp); |
| 958 | return (XATTR_ERRNO(error)); |
| 959 | } |
| 960 | |
| 961 | int |
| 962 | sys_fgetxattr(struct lwp *l, const struct sys_fgetxattr_args *uap, register_t *retval) |
| 963 | { |
| 964 | /* { |
| 965 | syscallarg(int) fd; |
| 966 | syscallarg(const char *) name; |
| 967 | syscallarg(void *) value; |
| 968 | syscallarg(size_t) size; |
| 969 | } */ |
| 970 | struct file *fp; |
| 971 | struct vnode *vp; |
| 972 | char attrname[XATTR_NAME_MAX]; |
| 973 | int attrnamespace; |
| 974 | int error; |
| 975 | |
| 976 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 977 | NULL); |
| 978 | if (error) |
| 979 | return (error); |
| 980 | |
| 981 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 982 | if (error) |
| 983 | return (error); |
| 984 | vp = fp->f_vnode; |
| 985 | |
| 986 | attrnamespace = xattr_native(attrname); |
| 987 | |
| 988 | error = extattr_get_vp(vp, attrnamespace, |
| 989 | attrname, SCARG(uap, value), SCARG(uap, size), l, retval); |
| 990 | |
| 991 | fd_putfile(SCARG(uap, fd)); |
| 992 | return (XATTR_ERRNO(error)); |
| 993 | } |
| 994 | |
| 995 | int |
| 996 | sys_listxattr(struct lwp *l, const struct sys_listxattr_args *uap, register_t *retval) |
| 997 | { |
| 998 | /* { |
| 999 | syscallarg(const char *) path; |
| 1000 | syscallarg(char *) list; |
| 1001 | syscallarg(size_t) size; |
| 1002 | } */ |
| 1003 | struct vnode *vp; |
| 1004 | char *list; |
| 1005 | size_t size; |
| 1006 | register_t listsize_usr, listsize_sys; |
| 1007 | int error; |
| 1008 | |
| 1009 | error = namei_simple_user(SCARG(uap, path), |
| 1010 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 1011 | if (error) |
| 1012 | return (error); |
| 1013 | |
| 1014 | list = SCARG(uap, list); |
| 1015 | size = SCARG(uap, size); |
| 1016 | |
| 1017 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER, |
| 1018 | list, size, 0, l, &listsize_usr); |
| 1019 | if (error) |
| 1020 | goto out; |
| 1021 | |
| 1022 | if (list) |
| 1023 | list += listsize_usr; |
| 1024 | if (size) |
| 1025 | size -= listsize_usr; |
| 1026 | |
| 1027 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM, |
| 1028 | list, size, 0, l, &listsize_sys); |
| 1029 | switch (error) { |
| 1030 | case EPERM: |
| 1031 | error = 0; /* Ignore and just skip system EA */ |
| 1032 | listsize_sys = 0; |
| 1033 | break; |
| 1034 | case 0: |
| 1035 | break; |
| 1036 | default: |
| 1037 | goto out; |
| 1038 | break; |
| 1039 | } |
| 1040 | |
| 1041 | *retval = listsize_usr + listsize_sys; |
| 1042 | |
| 1043 | out: |
| 1044 | vrele(vp); |
| 1045 | return (XATTR_ERRNO(error)); |
| 1046 | } |
| 1047 | |
| 1048 | int |
| 1049 | sys_llistxattr(struct lwp *l, const struct sys_llistxattr_args *uap, register_t *retval) |
| 1050 | { |
| 1051 | /* { |
| 1052 | syscallarg(const char *) path; |
| 1053 | syscallarg(char *) list; |
| 1054 | syscallarg(size_t) size; |
| 1055 | } */ |
| 1056 | struct vnode *vp; |
| 1057 | char *list; |
| 1058 | size_t size; |
| 1059 | register_t listsize_usr, listsize_sys; |
| 1060 | int error; |
| 1061 | |
| 1062 | error = namei_simple_user(SCARG(uap, path), |
| 1063 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 1064 | if (error) |
| 1065 | return (error); |
| 1066 | |
| 1067 | list = SCARG(uap, list); |
| 1068 | size = SCARG(uap, size); |
| 1069 | |
| 1070 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER, |
| 1071 | list, size, 0, l, &listsize_usr); |
| 1072 | if (error) |
| 1073 | goto out; |
| 1074 | if (list) |
| 1075 | list += listsize_usr; |
| 1076 | if (size) |
| 1077 | size -= listsize_usr; |
| 1078 | |
| 1079 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM, |
| 1080 | list, size, 0, l, &listsize_sys); |
| 1081 | switch (error) { |
| 1082 | case EPERM: |
| 1083 | error = 0; /* Ignore and just skip system EA */ |
| 1084 | listsize_sys = 0; |
| 1085 | break; |
| 1086 | case 0: |
| 1087 | break; |
| 1088 | default: |
| 1089 | goto out; |
| 1090 | break; |
| 1091 | } |
| 1092 | |
| 1093 | *retval = listsize_usr + listsize_sys; |
| 1094 | out: |
| 1095 | vrele(vp); |
| 1096 | return (XATTR_ERRNO(error)); |
| 1097 | } |
| 1098 | |
| 1099 | int |
| 1100 | sys_flistxattr(struct lwp *l, const struct sys_flistxattr_args *uap, register_t *retval) |
| 1101 | { |
| 1102 | /* { |
| 1103 | syscallarg(int) fd; |
| 1104 | syscallarg(char *) list; |
| 1105 | syscallarg(size_t) size; |
| 1106 | } */ |
| 1107 | struct file *fp; |
| 1108 | struct vnode *vp; |
| 1109 | char *list; |
| 1110 | size_t size; |
| 1111 | register_t listsize_usr, listsize_sys; |
| 1112 | int error; |
| 1113 | |
| 1114 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 1115 | if (error) |
| 1116 | return (error); |
| 1117 | vp = fp->f_vnode; |
| 1118 | |
| 1119 | list = SCARG(uap, list); |
| 1120 | size = SCARG(uap, size); |
| 1121 | |
| 1122 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER, |
| 1123 | list, size, 0, l, &listsize_usr); |
| 1124 | if (error) |
| 1125 | goto out; |
| 1126 | |
| 1127 | if (list) |
| 1128 | list += listsize_usr; |
| 1129 | if (size) |
| 1130 | size -= listsize_usr; |
| 1131 | |
| 1132 | error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM, |
| 1133 | list, size, 0, l, &listsize_sys); |
| 1134 | switch (error) { |
| 1135 | case EPERM: |
| 1136 | error = 0; /* Ignore and just skip system EA */ |
| 1137 | listsize_sys = 0; |
| 1138 | break; |
| 1139 | case 0: |
| 1140 | break; |
| 1141 | default: |
| 1142 | goto out; |
| 1143 | break; |
| 1144 | } |
| 1145 | |
| 1146 | *retval = listsize_usr + listsize_sys; |
| 1147 | out: |
| 1148 | |
| 1149 | fd_putfile(SCARG(uap, fd)); |
| 1150 | return (XATTR_ERRNO(error)); |
| 1151 | } |
| 1152 | |
| 1153 | int |
| 1154 | sys_removexattr(struct lwp *l, const struct sys_removexattr_args *uap, register_t *retval) |
| 1155 | { |
| 1156 | /* { |
| 1157 | syscallarg(const char *) path; |
| 1158 | syscallarg(const char *) name; |
| 1159 | } */ |
| 1160 | struct vnode *vp; |
| 1161 | char attrname[XATTR_NAME_MAX]; |
| 1162 | int attrnamespace; |
| 1163 | int error; |
| 1164 | |
| 1165 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 1166 | NULL); |
| 1167 | if (error) |
| 1168 | return (error); |
| 1169 | |
| 1170 | error = namei_simple_user(SCARG(uap, path), |
| 1171 | NSM_FOLLOW_NOEMULROOT, &vp); |
| 1172 | if (error) |
| 1173 | return (error); |
| 1174 | |
| 1175 | attrnamespace = xattr_native(attrname); |
| 1176 | |
| 1177 | error = extattr_delete_vp(vp, attrnamespace, attrname, l); |
| 1178 | |
| 1179 | vrele(vp); |
| 1180 | return (XATTR_ERRNO(error)); |
| 1181 | } |
| 1182 | |
| 1183 | int |
| 1184 | sys_lremovexattr(struct lwp *l, const struct sys_lremovexattr_args *uap, register_t *retval) |
| 1185 | { |
| 1186 | /* { |
| 1187 | syscallarg(const char *) path; |
| 1188 | syscallarg(const char *) name; |
| 1189 | } */ |
| 1190 | struct vnode *vp; |
| 1191 | char attrname[XATTR_NAME_MAX]; |
| 1192 | int attrnamespace; |
| 1193 | int error; |
| 1194 | |
| 1195 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 1196 | NULL); |
| 1197 | if (error) |
| 1198 | return (error); |
| 1199 | |
| 1200 | error = namei_simple_user(SCARG(uap, path), |
| 1201 | NSM_NOFOLLOW_NOEMULROOT, &vp); |
| 1202 | if (error) |
| 1203 | return (error); |
| 1204 | |
| 1205 | attrnamespace = xattr_native(attrname); |
| 1206 | |
| 1207 | error = extattr_delete_vp(vp, attrnamespace, attrname, l); |
| 1208 | |
| 1209 | vrele(vp); |
| 1210 | return (XATTR_ERRNO(error)); |
| 1211 | } |
| 1212 | |
| 1213 | int |
| 1214 | sys_fremovexattr(struct lwp *l, const struct sys_fremovexattr_args *uap, register_t *retval) |
| 1215 | { |
| 1216 | /* { |
| 1217 | syscallarg(int) fd; |
| 1218 | syscallarg(const char *) name; |
| 1219 | } */ |
| 1220 | struct file *fp; |
| 1221 | struct vnode *vp; |
| 1222 | char attrname[XATTR_NAME_MAX]; |
| 1223 | int attrnamespace; |
| 1224 | int error; |
| 1225 | |
| 1226 | error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), |
| 1227 | NULL); |
| 1228 | if (error) |
| 1229 | return (error); |
| 1230 | |
| 1231 | error = fd_getvnode(SCARG(uap, fd), &fp); |
| 1232 | if (error) |
| 1233 | return (error); |
| 1234 | vp = fp->f_vnode; |
| 1235 | |
| 1236 | attrnamespace = xattr_native(attrname); |
| 1237 | |
| 1238 | error = extattr_delete_vp(vp, attrnamespace, attrname, l); |
| 1239 | |
| 1240 | fd_putfile(SCARG(uap, fd)); |
| 1241 | return (XATTR_ERRNO(error)); |
| 1242 | } |
| 1243 | |