vfs_xattr.c revision 1.6.6.5
1 /* $NetBSD: vfs_xattr.c,v 1.6.6.5 2007/09/03 14:41:24 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1989, 1993 41 * The Regents of the University of California. All rights reserved. 42 * (c) UNIX System Laboratories, Inc. 43 * All or some portions of this file are derived from material licensed 44 * to the University of California by American Telephone and Telegraph 45 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 46 * the permission of UNIX System Laboratories, Inc. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 */ 72 73 /* 74 * VFS extended attribute support. 75 */ 76 77 #include <sys/cdefs.h> 78 __KERNEL_RCSID(0, "$NetBSD: vfs_xattr.c,v 1.6.6.5 2007/09/03 14:41:24 yamt Exp $"); 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/namei.h> 83 #include <sys/filedesc.h> 84 #include <sys/kernel.h> 85 #include <sys/file.h> 86 #include <sys/vnode.h> 87 #include <sys/mount.h> 88 #include <sys/proc.h> 89 #include <sys/uio.h> 90 #include <sys/extattr.h> 91 #include <sys/xattr.h> 92 #include <sys/sysctl.h> 93 #include <sys/syscallargs.h> 94 #include <sys/kauth.h> 95 96 /* 97 * Credential check based on process requesting service, and per-attribute 98 * permissions. 99 * 100 * NOTE: Vnode must be locked. 101 */ 102 int 103 extattr_check_cred(struct vnode *vp, int attrnamespace, 104 kauth_cred_t cred, struct lwp *l, int access) 105 { 106 107 if (cred == NOCRED) 108 return (0); 109 110 switch (attrnamespace) { 111 case EXTATTR_NAMESPACE_SYSTEM: 112 /* 113 * Do we really want to allow this, or just require that 114 * these requests come from kernel code (NOCRED case above)? 115 */ 116 return (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 117 NULL)); 118 119 case EXTATTR_NAMESPACE_USER: 120 return (VOP_ACCESS(vp, access, cred, l)); 121 122 default: 123 return (EPERM); 124 } 125 } 126 127 /* 128 * Default vfs_extattrctl routine for file systems that do not support 129 * it. 130 */ 131 /*ARGSUSED*/ 132 int 133 vfs_stdextattrctl(struct mount *mp, int cmt, struct vnode *vp, 134 int attrnamespace, const char *attrname, struct lwp *l) 135 { 136 137 if (vp != NULL) 138 VOP_UNLOCK(vp, 0); 139 return (EOPNOTSUPP); 140 } 141 142 /* 143 * Push extended attribute configuration information into the file 144 * system. 145 * 146 * NOTE: Not all file systems that support extended attributes will 147 * require the use of this system call. 148 */ 149 int 150 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 151 { 152 struct sys_extattrctl_args /* { 153 syscallarg(const char *) path; 154 syscallarg(int) cmd; 155 syscallarg(const char *) filename; 156 syscallarg(int) attrnamespace; 157 syscallarg(const char *) attrname; 158 } */ *uap = v; 159 struct vnode *vp; 160 struct nameidata nd; 161 char attrname[EXTATTR_MAXNAMELEN]; 162 int error; 163 164 if (SCARG(uap, attrname) != NULL) { 165 error = copyinstr(SCARG(uap, attrname), attrname, 166 sizeof(attrname), NULL); 167 if (error) 168 return (error); 169 } 170 171 vp = NULL; 172 if (SCARG(uap, filename) != NULL) { 173 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 174 SCARG(uap, filename), l); 175 error = namei(&nd); 176 if (error) 177 return (error); 178 vp = nd.ni_vp; 179 } 180 181 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 182 error = namei(&nd); 183 if (error) { 184 if (vp != NULL) 185 vput(vp); 186 return (error); 187 } 188 189 error = VFS_EXTATTRCTL(nd.ni_vp->v_mount, SCARG(uap, cmd), vp, 190 SCARG(uap, attrnamespace), 191 SCARG(uap, attrname) != NULL ? attrname : NULL, l); 192 193 if (vp != NULL) 194 vrele(vp); 195 196 return (error); 197 } 198 199 /***************************************************************************** 200 * Internal routines to manipulate file system extended attributes: 201 * - set 202 * - get 203 * - delete 204 * - list 205 *****************************************************************************/ 206 207 /* 208 * extattr_set_vp: 209 * 210 * Set a named extended attribute on a file or directory. 211 */ 212 static int 213 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 214 const void *data, size_t nbytes, struct lwp *l, register_t *retval) 215 { 216 struct uio auio; 217 struct iovec aiov; 218 ssize_t cnt; 219 int error; 220 221 VOP_LEASE(vp, l, l->l_cred, LEASE_WRITE); 222 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 223 224 aiov.iov_base = __UNCONST(data); /* XXXUNCONST kills const */ 225 aiov.iov_len = nbytes; 226 auio.uio_iov = &aiov; 227 auio.uio_iovcnt = 1; 228 auio.uio_offset = 0; 229 if (nbytes > INT_MAX) { 230 error = EINVAL; 231 goto done; 232 } 233 auio.uio_resid = nbytes; 234 auio.uio_rw = UIO_WRITE; 235 KASSERT(l == curlwp); 236 auio.uio_vmspace = l->l_proc->p_vmspace; 237 cnt = nbytes; 238 239 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 240 l->l_cred, l); 241 cnt -= auio.uio_resid; 242 retval[0] = cnt; 243 244 done: 245 VOP_UNLOCK(vp, 0); 246 return (error); 247 } 248 249 /* 250 * extattr_get_vp: 251 * 252 * Get a named extended attribute on a file or directory. 253 */ 254 static int 255 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 256 void *data, size_t nbytes, struct lwp *l, register_t *retval) 257 { 258 struct uio auio, *auiop; 259 struct iovec aiov; 260 ssize_t cnt; 261 size_t size, *sizep; 262 int error; 263 264 VOP_LEASE(vp, l, l->l_cred, LEASE_READ); 265 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 266 267 /* 268 * Slightly unusual semantics: if the user provides a NULL data 269 * pointer, they don't want to receive the data, just the maximum 270 * read length. 271 */ 272 auiop = NULL; 273 sizep = NULL; 274 cnt = 0; 275 if (data != NULL) { 276 aiov.iov_base = data; 277 aiov.iov_len = nbytes; 278 auio.uio_iov = &aiov; 279 auio.uio_offset = 0; 280 if (nbytes > INT_MAX) { 281 error = EINVAL; 282 goto done; 283 } 284 auio.uio_resid = nbytes; 285 auio.uio_rw = UIO_READ; 286 KASSERT(l == curlwp); 287 auio.uio_vmspace = l->l_proc->p_vmspace; 288 auiop = &auio; 289 cnt = nbytes; 290 } else 291 sizep = &size; 292 293 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 294 l->l_cred, l); 295 296 if (auiop != NULL) { 297 cnt -= auio.uio_resid; 298 retval[0] = cnt; 299 } else 300 retval[0] = size; 301 302 done: 303 VOP_UNLOCK(vp, 0); 304 return (error); 305 } 306 307 /* 308 * extattr_delete_vp: 309 * 310 * Delete a named extended attribute on a file or directory. 311 */ 312 static int 313 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 314 struct lwp *l) 315 { 316 int error; 317 318 VOP_LEASE(vp, l, l->l_cred, LEASE_WRITE); 319 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 320 321 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, l->l_cred, l); 322 if (error == EOPNOTSUPP) 323 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 324 l->l_cred, l); 325 326 VOP_UNLOCK(vp, 0); 327 return (error); 328 } 329 330 /* 331 * extattr_list_vp: 332 * 333 * Retrieve a list of extended attributes on a file or directory. 334 */ 335 static int 336 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 337 struct lwp *l, register_t *retval) 338 { 339 struct uio auio, *auiop; 340 size_t size, *sizep; 341 struct iovec aiov; 342 ssize_t cnt; 343 int error; 344 345 VOP_LEASE(vp, l, l->l_cred, LEASE_READ); 346 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 347 348 auiop = NULL; 349 sizep = NULL; 350 cnt = 0; 351 if (data != NULL) { 352 aiov.iov_base = data; 353 aiov.iov_len = nbytes; 354 auio.uio_iov = &aiov; 355 auio.uio_offset = 0; 356 if (nbytes > INT_MAX) { 357 error = EINVAL; 358 goto done; 359 } 360 auio.uio_resid = nbytes; 361 auio.uio_rw = UIO_READ; 362 KASSERT(l == curlwp); 363 auio.uio_vmspace = l->l_proc->p_vmspace; 364 auiop = &auio; 365 cnt = nbytes; 366 } else 367 sizep = &size; 368 369 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 370 l->l_cred, l); 371 372 if (auiop != NULL) { 373 cnt -= auio.uio_resid; 374 retval[0] = cnt; 375 } else 376 retval[0] = size; 377 378 done: 379 VOP_UNLOCK(vp, 0); 380 return (error); 381 } 382 383 /***************************************************************************** 384 * BSD <sys/extattr.h> API for file system extended attributes 385 *****************************************************************************/ 386 387 int 388 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 389 { 390 struct sys_extattr_set_fd_args /* { 391 syscallarg(int) fd; 392 syscallarg(int) attrnamespace; 393 syscallarg(const char *) attrname; 394 syscallarg(const void *) data; 395 syscallarg(size_t) nbytes; 396 } */ *uap = v; 397 struct file *fp; 398 struct vnode *vp; 399 char attrname[EXTATTR_MAXNAMELEN]; 400 int error; 401 402 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 403 NULL); 404 if (error) 405 return (error); 406 407 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 408 if (error) 409 return (error); 410 vp = (struct vnode *) fp->f_data; 411 412 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 413 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 414 415 FILE_UNUSE(fp, l); 416 return (error); 417 } 418 419 int 420 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 421 { 422 struct sys_extattr_set_file_args /* { 423 syscallarg(const char *) path; 424 syscallarg(int) attrnamespace; 425 syscallarg(const char *) attrname; 426 syscallarg(const void *) data; 427 syscallarg(size_t) nbytes; 428 } */ *uap = v; 429 struct nameidata nd; 430 char attrname[EXTATTR_MAXNAMELEN]; 431 int error; 432 433 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 434 NULL); 435 if (error) 436 return (error); 437 438 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 439 error = namei(&nd); 440 if (error) 441 return (error); 442 443 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 444 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 445 446 vrele(nd.ni_vp); 447 return (error); 448 } 449 450 int 451 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 452 { 453 struct sys_extattr_set_link_args /* { 454 syscallarg(const char *) path; 455 syscallarg(int) attrnamespace; 456 syscallarg(const char *) attrname; 457 syscallarg(const void *) data; 458 syscallarg(size_t) nbytes; 459 } */ *uap = v; 460 struct nameidata nd; 461 char attrname[EXTATTR_MAXNAMELEN]; 462 int error; 463 464 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 465 NULL); 466 if (error) 467 return (error); 468 469 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 470 error = namei(&nd); 471 if (error) 472 return (error); 473 474 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 475 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 476 477 vrele(nd.ni_vp); 478 return (error); 479 } 480 481 int 482 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 483 { 484 struct sys_extattr_get_fd_args /* { 485 syscallarg(int) fd; 486 syscallarg(int) attrnamespace; 487 syscallarg(const char *) attrname; 488 syscallarg(void *) data; 489 syscallarg(size_t) nbytes; 490 } */ *uap = v; 491 struct file *fp; 492 struct vnode *vp; 493 char attrname[EXTATTR_MAXNAMELEN]; 494 int error; 495 496 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 497 NULL); 498 if (error) 499 return (error); 500 501 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 502 if (error) 503 return (error); 504 vp = (struct vnode *) fp->f_data; 505 506 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 507 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 508 509 FILE_UNUSE(fp, l); 510 return (error); 511 } 512 513 int 514 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 515 { 516 struct sys_extattr_get_file_args /* { 517 syscallarg(const char *) path; 518 syscallarg(int) attrnamespace; 519 syscallarg(const char *) attrname; 520 syscallarg(void *) data; 521 syscallarg(size_t) nbytes; 522 } */ *uap = v; 523 struct nameidata nd; 524 char attrname[EXTATTR_MAXNAMELEN]; 525 int error; 526 527 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 528 NULL); 529 if (error) 530 return (error); 531 532 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 533 error = namei(&nd); 534 if (error) 535 return (error); 536 537 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 538 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 539 540 vrele(nd.ni_vp); 541 return (error); 542 } 543 544 int 545 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 546 { 547 struct sys_extattr_get_link_args /* { 548 syscallarg(const char *) path; 549 syscallarg(int) attrnamespace; 550 syscallarg(const char *) attrname; 551 syscallarg(void *) data; 552 syscallarg(size_t) nbytes; 553 } */ *uap = v; 554 struct nameidata nd; 555 char attrname[EXTATTR_MAXNAMELEN]; 556 int error; 557 558 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 559 NULL); 560 if (error) 561 return (error); 562 563 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 564 error = namei(&nd); 565 if (error) 566 return (error); 567 568 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 569 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 570 571 vrele(nd.ni_vp); 572 return (error); 573 } 574 575 int 576 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 577 { 578 struct sys_extattr_delete_fd_args /* { 579 syscallarg(int) fd; 580 syscallarg(int) attrnamespace; 581 syscallarg(const char *) attrname; 582 } */ *uap = v; 583 struct file *fp; 584 struct vnode *vp; 585 char attrname[EXTATTR_MAXNAMELEN]; 586 int error; 587 588 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 589 NULL); 590 if (error) 591 return (error); 592 593 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 594 if (error) 595 return (error); 596 vp = (struct vnode *) fp->f_data; 597 598 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l); 599 600 FILE_UNUSE(fp, l); 601 return (error); 602 } 603 604 int 605 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 606 { 607 struct sys_extattr_delete_file_args /* { 608 syscallarg(const char *) path; 609 syscallarg(int) attrnamespace; 610 syscallarg(const char *) attrname; 611 } */ *uap = v; 612 struct nameidata nd; 613 char attrname[EXTATTR_MAXNAMELEN]; 614 int error; 615 616 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 617 NULL); 618 if (error) 619 return (error); 620 621 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 622 error = namei(&nd); 623 if (error) 624 return (error); 625 626 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 627 l); 628 629 vrele(nd.ni_vp); 630 return (error); 631 } 632 633 int 634 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 635 { 636 struct sys_extattr_delete_link_args /* { 637 syscallarg(const char *) path; 638 syscallarg(int) attrnamespace; 639 syscallarg(const char *) attrname; 640 } */ *uap = v; 641 struct nameidata nd; 642 char attrname[EXTATTR_MAXNAMELEN]; 643 int error; 644 645 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 646 NULL); 647 if (error) 648 return (error); 649 650 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 651 error = namei(&nd); 652 if (error) 653 return (error); 654 655 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 656 l); 657 658 vrele(nd.ni_vp); 659 return (error); 660 } 661 662 int 663 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 664 { 665 struct sys_extattr_list_fd_args /* { 666 syscallarg(int) fd; 667 syscallarg(int) attrnamespace; 668 syscallarg(void *) data; 669 syscallarg(size_t) nbytes; 670 } */ *uap = v; 671 struct file *fp; 672 struct vnode *vp; 673 int error; 674 675 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 676 if (error) 677 return (error); 678 vp = (struct vnode *) fp->f_data; 679 680 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 681 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 682 683 FILE_UNUSE(fp, l); 684 return (error); 685 } 686 687 int 688 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 689 { 690 struct sys_extattr_list_file_args /* { 691 syscallarg(const char *) path; 692 syscallarg(int) attrnamespace; 693 syscallarg(void *) data; 694 syscallarg(size_t) nbytes; 695 } */ *uap = v; 696 struct nameidata nd; 697 int error; 698 699 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 700 error = namei(&nd); 701 if (error) 702 return (error); 703 704 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 705 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 706 707 vrele(nd.ni_vp); 708 return (error); 709 } 710 711 int 712 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 713 { 714 struct sys_extattr_list_link_args /* { 715 syscallarg(const char *) path; 716 syscallarg(int) attrnamespace; 717 syscallarg(void *) data; 718 syscallarg(size_t) nbytes; 719 } */ *uap = v; 720 struct nameidata nd; 721 int error; 722 723 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 724 error = namei(&nd); 725 if (error) 726 return (error); 727 728 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 729 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 730 731 vrele(nd.ni_vp); 732 return (error); 733 } 734 735 /***************************************************************************** 736 * Linux-compatible <sys/xattr.h> API for file system extended attributes 737 *****************************************************************************/ 738 739 int 740 sys_setxattr(struct lwp *l, void *v, register_t *retval) 741 { 742 struct sys_setxattr_args /* { 743 syscallarg(const char *) path; 744 syscallarg(const char *) name; 745 syscallarg(void *) value; 746 syscallarg(size_t) size; 747 syscallarg(int) flags; 748 } */ *uap = v; 749 struct nameidata nd; 750 char attrname[XATTR_NAME_MAX]; 751 int error; 752 753 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 754 NULL); 755 if (error) 756 return (error); 757 758 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 759 error = namei(&nd); 760 if (error) 761 return (error); 762 763 /* XXX flags */ 764 765 error = extattr_set_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 766 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 767 768 vrele(nd.ni_vp); 769 return (error); 770 } 771 772 int 773 sys_lsetxattr(struct lwp *l, void *v, register_t *retval) 774 { 775 struct sys_lsetxattr_args /* { 776 syscallarg(const char *) path; 777 syscallarg(const char *) name; 778 syscallarg(void *) value; 779 syscallarg(size_t) size; 780 syscallarg(int) flags; 781 } */ *uap = v; 782 struct nameidata nd; 783 char attrname[XATTR_NAME_MAX]; 784 int error; 785 786 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 787 NULL); 788 if (error) 789 return (error); 790 791 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 792 error = namei(&nd); 793 if (error) 794 return (error); 795 796 /* XXX flags */ 797 798 error = extattr_set_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 799 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 800 801 vrele(nd.ni_vp); 802 return (error); 803 } 804 805 int 806 sys_fsetxattr(struct lwp *l, void *v, register_t *retval) 807 { 808 struct sys_fsetxattr_args /* { 809 syscallarg(int) fd; 810 syscallarg(const char *) name; 811 syscallarg(void *) value; 812 syscallarg(size_t) size; 813 syscallarg(int) flags; 814 } */ *uap = v; 815 struct file *fp; 816 struct vnode *vp; 817 char attrname[XATTR_NAME_MAX]; 818 int error; 819 820 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 821 NULL); 822 if (error) 823 return (error); 824 825 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 826 if (error) 827 return (error); 828 vp = (struct vnode *) fp->f_data; 829 830 /* XXX flags */ 831 832 error = extattr_set_vp(vp, EXTATTR_NAMESPACE_USER, 833 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 834 835 FILE_UNUSE(fp, l); 836 return (error); 837 } 838 839 int 840 sys_getxattr(struct lwp *l, void *v, register_t *retval) 841 { 842 struct sys_getxattr_args /* { 843 syscallarg(const char *) path; 844 syscallarg(const char *) name; 845 syscallarg(void *) value; 846 syscallarg(size_t) size; 847 } */ *uap = v; 848 struct nameidata nd; 849 char attrname[XATTR_NAME_MAX]; 850 int error; 851 852 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 853 NULL); 854 if (error) 855 return (error); 856 857 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 858 error = namei(&nd); 859 if (error) 860 return (error); 861 862 error = extattr_get_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 863 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 864 865 vrele(nd.ni_vp); 866 return (error); 867 } 868 869 int 870 sys_lgetxattr(struct lwp *l, void *v, register_t *retval) 871 { 872 struct sys_lgetxattr_args /* { 873 syscallarg(const char *) path; 874 syscallarg(const char *) name; 875 syscallarg(void *) value; 876 syscallarg(size_t) size; 877 } */ *uap = v; 878 struct nameidata nd; 879 char attrname[XATTR_NAME_MAX]; 880 int error; 881 882 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 883 NULL); 884 if (error) 885 return (error); 886 887 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 888 error = namei(&nd); 889 if (error) 890 return (error); 891 892 error = extattr_get_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 893 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 894 895 vrele(nd.ni_vp); 896 return (error); 897 } 898 899 int 900 sys_fgetxattr(struct lwp *l, void *v, register_t *retval) 901 { 902 struct sys_fgetxattr_args /* { 903 syscallarg(int) fd; 904 syscallarg(const char *) name; 905 syscallarg(void *) value; 906 syscallarg(size_t) size; 907 } */ *uap = v; 908 struct file *fp; 909 struct vnode *vp; 910 char attrname[XATTR_NAME_MAX]; 911 int error; 912 913 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 914 NULL); 915 if (error) 916 return (error); 917 918 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 919 if (error) 920 return (error); 921 vp = (struct vnode *) fp->f_data; 922 923 error = extattr_get_vp(vp, EXTATTR_NAMESPACE_USER, 924 attrname, SCARG(uap, value), SCARG(uap, size), l, retval); 925 926 FILE_UNUSE(fp, l); 927 return (error); 928 } 929 930 int 931 sys_listxattr(struct lwp *l, void *v, register_t *retval) 932 { 933 struct sys_listxattr_args /* { 934 syscallarg(const char *) path; 935 syscallarg(char *) list; 936 syscallarg(size_t) size; 937 } */ *uap = v; 938 struct nameidata nd; 939 int error; 940 941 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 942 error = namei(&nd); 943 if (error) 944 return (error); 945 946 error = extattr_list_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 947 SCARG(uap, list), SCARG(uap, size), l, retval); 948 949 vrele(nd.ni_vp); 950 return (error); 951 } 952 953 int 954 sys_llistxattr(struct lwp *l, void *v, register_t *retval) 955 { 956 struct sys_llistxattr_args /* { 957 syscallarg(const char *) path; 958 syscallarg(char *) list; 959 syscallarg(size_t) size; 960 } */ *uap = v; 961 struct nameidata nd; 962 int error; 963 964 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 965 error = namei(&nd); 966 if (error) 967 return (error); 968 969 error = extattr_list_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 970 SCARG(uap, list), SCARG(uap, size), l, retval); 971 972 vrele(nd.ni_vp); 973 return (error); 974 } 975 976 int 977 sys_flistxattr(struct lwp *l, void *v, register_t *retval) 978 { 979 struct sys_flistxattr_args /* { 980 syscallarg(int) fd; 981 syscallarg(char *) list; 982 syscallarg(size_t) size; 983 } */ *uap = v; 984 struct file *fp; 985 struct vnode *vp; 986 int error; 987 988 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 989 if (error) 990 return (error); 991 vp = (struct vnode *) fp->f_data; 992 993 error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER, 994 SCARG(uap, list), SCARG(uap, size), l, retval); 995 996 FILE_UNUSE(fp, l); 997 return (error); 998 } 999 1000 int 1001 sys_removexattr(struct lwp *l, void *v, register_t *retval) 1002 { 1003 struct sys_removexattr_args /* { 1004 syscallarg(const char *) path; 1005 syscallarg(const char *) name; 1006 } */ *uap = v; 1007 struct nameidata nd; 1008 char attrname[XATTR_NAME_MAX]; 1009 int error; 1010 1011 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 1012 NULL); 1013 if (error) 1014 return (error); 1015 1016 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 1017 error = namei(&nd); 1018 if (error) 1019 return (error); 1020 1021 error = extattr_delete_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 1022 attrname, l); 1023 1024 vrele(nd.ni_vp); 1025 return (error); 1026 } 1027 1028 int 1029 sys_lremovexattr(struct lwp *l, void *v, register_t *retval) 1030 { 1031 struct sys_lremovexattr_args /* { 1032 syscallarg(const char *) path; 1033 syscallarg(const char *) name; 1034 } */ *uap = v; 1035 struct nameidata nd; 1036 char attrname[XATTR_NAME_MAX]; 1037 int error; 1038 1039 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 1040 NULL); 1041 if (error) 1042 return (error); 1043 1044 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 1045 error = namei(&nd); 1046 if (error) 1047 return (error); 1048 1049 error = extattr_delete_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER, 1050 attrname, l); 1051 1052 vrele(nd.ni_vp); 1053 return (error); 1054 } 1055 1056 int 1057 sys_fremovexattr(struct lwp *l, void *v, register_t *retval) 1058 { 1059 struct sys_fremovexattr_args /* { 1060 syscallarg(int) fd; 1061 syscallarg(const char *) name; 1062 } */ *uap = v; 1063 struct file *fp; 1064 struct vnode *vp; 1065 char attrname[XATTR_NAME_MAX]; 1066 int error; 1067 1068 error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname), 1069 NULL); 1070 if (error) 1071 return (error); 1072 1073 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 1074 if (error) 1075 return (error); 1076 vp = (struct vnode *) fp->f_data; 1077 1078 error = extattr_delete_vp(vp, EXTATTR_NAMESPACE_USER, 1079 attrname, l); 1080 1081 FILE_UNUSE(fp, l); 1082 return (error); 1083 } 1084
Indexes created Sat Sep 20 22:09:52 GMT 2025