1 /*- 2 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 /* 29 * Developed by the TrustedBSD Project. 30 * Support for POSIX.1e access control lists. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/sysproto.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/vnode.h> 39 #include <sys/lock.h> 40 #include <sys/namei.h> 41 #include <sys/file.h> 42 #include <sys/proc.h> 43 #include <sys/sysent.h> 44 #include <sys/errno.h> 45 #include <sys/stat.h> 46 #include <sys/acl.h> 47 48 MALLOC_DEFINE(M_ACL, "acl", "access control list"); 49 50 static int vacl_set_acl(struct proc *p, struct vnode *vp, acl_type_t type, 51 struct acl *aclp); 52 static int vacl_get_acl(struct proc *p, struct vnode *vp, acl_type_t type, 53 struct acl *aclp); 54 static int vacl_aclcheck(struct proc *p, struct vnode *vp, acl_type_t type, 55 struct acl *aclp); 56 57 /* 58 * Implement a version of vaccess() that understands POSIX.1e ACL semantics. 59 * Return 0 on success, else an errno value. Should be merged into 60 * vaccess() eventually. 61 */ 62 int 63 vaccess_acl_posix1e(enum vtype type, struct acl *acl, mode_t acc_mode, 64 struct ucred *cred, int *privused) 65 { 66 struct acl_entry *acl_other, *acl_mask; 67 mode_t dac_granted; 68 mode_t cap_granted; 69 mode_t acl_mask_granted; 70 int group_matched, i; 71 72 /* 73 * Look for a normal, non-privileged way to access the file/directory 74 * as requested. If it exists, go with that. Otherwise, attempt 75 * to use privileges granted via cap_granted. In some cases, 76 * which privileges to use may be ambiguous due to "best match", 77 * in which case fall back on first match for the time being. 78 */ 79 if (privused != NULL) 80 *privused = 0; 81 82 /* 83 * Determine privileges now, but don't apply until we've found 84 * a DAC match that has failed to allow access. 85 */ 86 #ifndef CAPABILITIES 87 if (suser_xxx(cred, NULL, PRISON_ROOT) == 0) 88 cap_granted = (VEXEC | VREAD | VWRITE | VADMIN); 89 else 90 cap_granted = 0; 91 #else 92 cap_granted = 0; 93 94 if (type == VDIR) { 95 if ((acc_mode & VEXEC) && !cap_check(cred, NULL, 96 CAP_DAC_READ_SEARCH, PRISON_ROOT)) 97 cap_granted |= VEXEC; 98 } else { 99 if ((acc_mode & VEXEC) && !cap_check(cred, NULL, 100 CAP_DAC_EXECUTE, PRISON_ROOT)) 101 cap_granted |= VEXEC; 102 } 103 104 if ((acc_mode & VREAD) && !cap_check(cred, NULL, CAP_DAC_READ_SEARCH, 105 PRISON_ROOT)) 106 cap_granted |= VREAD; 107 108 if ((acc_mode & VWRITE) && !cap_check(cred, NULL, CAP_DAC_WRITE, 109 PRISON_ROOT)) 110 cap_granted |= VWRITE; 111 112 if ((acc_mode & VADMIN) && !cap_check(cred, NULL, CAP_FOWNER, 113 PRISON_ROOT)) 114 cap_granted |= VADMIN; 115 #endif /* CAPABILITIES */ 116 117 /* 118 * Check the owner. 119 * Also, record locations of ACL_MASK and ACL_OTHER for reference 120 * later if the owner doesn't match. 121 */ 122 acl_mask = acl_other = NULL; 123 for (i = 0; i < acl->acl_cnt; i++) { 124 switch (acl->acl_entry[i].ae_tag) { 125 case ACL_USER_OBJ: 126 if (acl->acl_entry[i].ae_id != cred->cr_uid) 127 break; 128 dac_granted = 0; 129 dac_granted |= VADMIN; 130 if (acl->acl_entry[i].ae_perm & ACL_PERM_EXEC) 131 dac_granted |= VEXEC; 132 if (acl->acl_entry[i].ae_perm & ACL_PERM_READ) 133 dac_granted |= VREAD; 134 if (acl->acl_entry[i].ae_perm & ACL_PERM_WRITE) 135 dac_granted |= VWRITE; 136 if ((acc_mode & dac_granted) == acc_mode) 137 return (0); 138 if ((acc_mode & (dac_granted | cap_granted)) == 139 acc_mode) { 140 if (privused != NULL) 141 *privused = 1; 142 return (0); 143 } 144 goto error; 145 146 case ACL_MASK: 147 acl_mask = &acl->acl_entry[i]; 148 break; 149 150 case ACL_OTHER: 151 acl_other = &acl->acl_entry[i]; 152 break; 153 154 default: 155 } 156 } 157 158 /* 159 * Checks against ACL_USER, ACL_GROUP_OBJ, and ACL_GROUP fields 160 * are masked by an ACL_MASK entry, if any. As such, first identify 161 * the ACL_MASK field, then iterate through identifying potential 162 * user matches, then group matches. If there is no ACL_MASK, 163 * assume that the mask allows all requests to succeed. 164 * Also keep track of the location of ACL_OTHER for later consumption. 165 */ 166 if (acl_other == NULL) { 167 /* 168 * XXX: This should never happen. Only properly formatted 169 * ACLs should be passed to vaccess_acl_posix1e. 170 * Should make this a panic post-debugging. 171 */ 172 printf("vaccess_acl_posix1e: ACL_OTHER missing\n"); 173 return (EPERM); 174 } 175 if (acl_mask != NULL) { 176 acl_mask_granted = 0; 177 if (acl_mask->ae_perm & ACL_PERM_EXEC) 178 acl_mask_granted |= VEXEC; 179 if (acl_mask->ae_perm & ACL_PERM_READ) 180 acl_mask_granted |= VREAD; 181 if (acl_mask->ae_perm & ACL_PERM_WRITE) 182 acl_mask_granted |= VWRITE; 183 } else 184 acl_mask_granted = VEXEC | VREAD | VWRITE; 185 186 /* 187 * We have to check each type even if we know ACL_MASK will reject, 188 * as we need to know what match there might have been, and 189 * therefore what further types we might be allowed to check. 190 * Do the checks twice -- once without privilege, and a second time 191 * with, if there was a match. 192 */ 193 194 /* 195 * Check ACL_USER ACL entries. 196 */ 197 for (i = 0; i < acl->acl_cnt; i++) { 198 switch (acl->acl_entry[i].ae_tag) { 199 case ACL_USER: 200 if (acl->acl_entry[i].ae_id != cred->cr_uid) 201 break; 202 dac_granted = 0; 203 if (acl->acl_entry[i].ae_perm & ACL_PERM_EXEC) 204 dac_granted |= VEXEC; 205 if (acl->acl_entry[i].ae_perm & ACL_PERM_READ) 206 dac_granted |= VREAD; 207 if (acl->acl_entry[i].ae_perm & ACL_PERM_WRITE) 208 dac_granted |= VWRITE; 209 dac_granted &= acl_mask_granted; 210 if ((acc_mode & dac_granted) == acc_mode) 211 return (0); 212 if ((acc_mode & (dac_granted | cap_granted)) == 213 acc_mode) { 214 if (privused != NULL) 215 *privused = 1; 216 return (0); 217 } 218 goto error; 219 } 220 } 221 222 /* 223 * Group match is best-match, not first-match, so find a 224 * "best" match. Iterate across, testing each potential group 225 * match. Make sure we keep track of whether we found a match 226 * or not, so that we know if we can move on to ACL_OTHER. 227 */ 228 group_matched = 0; 229 for (i = 0; i < acl->acl_cnt; i++) { 230 switch (acl->acl_entry[i].ae_tag) { 231 case ACL_GROUP_OBJ: 232 case ACL_GROUP: 233 if (groupmember(acl->acl_entry[i].ae_id, cred)) { 234 dac_granted = 0; 235 if (acl->acl_entry[i].ae_perm & ACL_PERM_EXEC) 236 dac_granted |= VEXEC; 237 if (acl->acl_entry[i].ae_perm & ACL_PERM_READ) 238 dac_granted |= VREAD; 239 if (acl->acl_entry[i].ae_perm & ACL_PERM_WRITE) 240 dac_granted |= VWRITE; 241 dac_granted &= acl_mask_granted; 242 243 if ((acc_mode & dac_granted) == acc_mode) 244 return (0); 245 246 group_matched = 1; 247 } 248 default: 249 } 250 } 251 252 if (group_matched == 1) { 253 /* 254 * There was a match, but it did not grant rights via 255 * pure DAC. Try again, this time with privilege. 256 */ 257 for (i = 0; i < acl->acl_cnt; i++) { 258 switch (acl->acl_entry[i].ae_tag) { 259 case ACL_GROUP_OBJ: 260 case ACL_GROUP: 261 if (groupmember(acl->acl_entry[i].ae_id, 262 cred)) { 263 dac_granted = 0; 264 if (acl->acl_entry[i].ae_perm & 265 ACL_PERM_EXEC) 266 dac_granted |= VEXEC; 267 if (acl->acl_entry[i].ae_perm & 268 ACL_PERM_READ) 269 dac_granted |= VREAD; 270 if (acl->acl_entry[i].ae_perm & 271 ACL_PERM_WRITE) 272 dac_granted |= VWRITE; 273 dac_granted &= acl_mask_granted; 274 if ((acc_mode & (dac_granted | 275 cap_granted)) == acc_mode) { 276 if (privused != NULL) 277 *privused = 1; 278 return (0); 279 } 280 } 281 default: 282 } 283 } 284 /* 285 * Even with privilege, group membership was not sufficient. 286 * Return failure. 287 */ 288 goto error; 289 } 290 291 /* 292 * Fall back on ACL_OTHER. ACL_MASK is not applied to ACL_OTHER. 293 */ 294 dac_granted = 0; 295 if (acl_other->ae_perm & ACL_PERM_EXEC) 296 dac_granted |= VEXEC; 297 if (acl_other->ae_perm & ACL_PERM_READ) 298 dac_granted |= VREAD; 299 if (acl_other->ae_perm & ACL_PERM_WRITE) 300 dac_granted |= VWRITE; 301 302 if ((acc_mode & dac_granted) == acc_mode) 303 return (0); 304 if ((acc_mode & (dac_granted | cap_granted)) == acc_mode) { 305 if (privused != NULL) 306 *privused = 1; 307 return (0); 308 } 309 310 error: 311 return ((acc_mode & VADMIN) ? EPERM : EACCES); 312 } 313 314 /* 315 * For the purposes of file systems maintaining the _OBJ entries in an 316 * inode with a mode_t field, this routine converts a mode_t entry 317 * to an acl_perm_t. 318 */ 319 acl_perm_t 320 acl_posix1e_mode_to_perm(acl_tag_t tag, mode_t mode) 321 { 322 acl_perm_t perm = 0; 323 324 switch(tag) { 325 case ACL_USER_OBJ: 326 if (mode & S_IXUSR) 327 perm |= ACL_PERM_EXEC; 328 if (mode & S_IRUSR) 329 perm |= ACL_PERM_READ; 330 if (mode & S_IWUSR) 331 perm |= ACL_PERM_WRITE; 332 return (perm); 333 334 case ACL_GROUP_OBJ: 335 if (mode & S_IXGRP) 336 perm |= ACL_PERM_EXEC; 337 if (mode & S_IRGRP) 338 perm |= ACL_PERM_READ; 339 if (mode & S_IWGRP) 340 perm |= ACL_PERM_WRITE; 341 return (perm); 342 343 case ACL_OTHER: 344 if (mode & S_IXOTH) 345 perm |= ACL_PERM_EXEC; 346 if (mode & S_IROTH) 347 perm |= ACL_PERM_READ; 348 if (mode & S_IWOTH) 349 perm |= ACL_PERM_WRITE; 350 return (perm); 351 352 default: 353 printf("acl_posix1e_mode_to_perm: invalid tag (%d)\n", tag); 354 return (0); 355 } 356 } 357 358 /* 359 * Given inode information (uid, gid, mode), return an acl entry of the 360 * appropriate type. 361 */ 362 struct acl_entry 363 acl_posix1e_mode_to_entry(acl_tag_t tag, uid_t uid, gid_t gid, mode_t mode) 364 { 365 struct acl_entry acl_entry; 366 367 acl_entry.ae_tag = tag; 368 acl_entry.ae_perm = acl_posix1e_mode_to_perm(tag, mode); 369 switch(tag) { 370 case ACL_USER_OBJ: 371 acl_entry.ae_id = uid; 372 break; 373 374 case ACL_GROUP_OBJ: 375 acl_entry.ae_id = gid; 376 break; 377 378 case ACL_OTHER: 379 acl_entry.ae_id = 0; 380 break; 381 382 default: 383 acl_entry.ae_id = 0; 384 printf("acl_posix1e_mode_to_entry: invalid tag (%d)\n", tag); 385 } 386 387 return (acl_entry); 388 } 389 390 /* 391 * Utility function to generate a file mode given appropriate ACL entries. 392 */ 393 mode_t 394 acl_posix1e_perms_to_mode(struct acl_entry *acl_user_obj_entry, 395 struct acl_entry *acl_group_obj_entry, struct acl_entry *acl_other_entry) 396 { 397 mode_t mode; 398 399 mode = 0; 400 if (acl_user_obj_entry->ae_perm & ACL_PERM_EXEC) 401 mode |= S_IXUSR; 402 if (acl_user_obj_entry->ae_perm & ACL_PERM_READ) 403 mode |= S_IRUSR; 404 if (acl_user_obj_entry->ae_perm & ACL_PERM_WRITE) 405 mode |= S_IWUSR; 406 if (acl_group_obj_entry->ae_perm & ACL_PERM_EXEC) 407 mode |= S_IXGRP; 408 if (acl_group_obj_entry->ae_perm & ACL_PERM_READ) 409 mode |= S_IRGRP; 410 if (acl_group_obj_entry->ae_perm & ACL_PERM_WRITE) 411 mode |= S_IWGRP; 412 if (acl_other_entry->ae_perm & ACL_PERM_EXEC) 413 mode |= S_IXOTH; 414 if (acl_other_entry->ae_perm & ACL_PERM_READ) 415 mode |= S_IROTH; 416 if (acl_other_entry->ae_perm & ACL_PERM_WRITE) 417 mode |= S_IWOTH; 418 419 return (mode); 420 } 421 422 /* 423 * Perform a syntactic check of the ACL, sufficient to allow an 424 * implementing file system to determine if it should accept this and 425 * rely on the POSIX.1e ACL properties. 426 */ 427 int 428 acl_posix1e_check(struct acl *acl) 429 { 430 int num_acl_user_obj, num_acl_user, num_acl_group_obj, num_acl_group; 431 int num_acl_mask, num_acl_other, i; 432 433 /* 434 * Verify that the number of entries does not exceed the maximum 435 * defined for acl_t. 436 * Verify that the correct number of various sorts of ae_tags are 437 * present: 438 * Exactly one ACL_USER_OBJ 439 * Exactly one ACL_GROUP_OBJ 440 * Exactly one ACL_OTHER 441 * If any ACL_USER or ACL_GROUP entries appear, then exactly one 442 * ACL_MASK entry must also appear. 443 * Verify that all ae_perm entries are in ACL_PERM_BITS. 444 * Verify all ae_tag entries are understood by this implementation. 445 * Note: Does not check for uniqueness of qualifier (ae_id) field. 446 */ 447 num_acl_user_obj = num_acl_user = num_acl_group_obj = num_acl_group = 448 num_acl_mask = num_acl_other = 0; 449 if (acl->acl_cnt > ACL_MAX_ENTRIES || acl->acl_cnt < 0) 450 return (EINVAL); 451 for (i = 0; i < acl->acl_cnt; i++) { 452 /* 453 * Check for a valid tag. 454 */ 455 switch(acl->acl_entry[i].ae_tag) { 456 case ACL_USER_OBJ: 457 num_acl_user_obj++; 458 break; 459 case ACL_GROUP_OBJ: 460 num_acl_group_obj++; 461 break; 462 case ACL_USER: 463 num_acl_user++; 464 break; 465 case ACL_GROUP: 466 num_acl_group++; 467 break; 468 case ACL_OTHER: 469 num_acl_other++; 470 break; 471 case ACL_MASK: 472 num_acl_mask++; 473 break; 474 default: 475 return (EINVAL); 476 } 477 /* 478 * Check for valid perm entries. 479 */ 480 if ((acl->acl_entry[i].ae_perm | ACL_PERM_BITS) != 481 ACL_PERM_BITS) 482 return (EINVAL); 483 } 484 if ((num_acl_user_obj != 1) || (num_acl_group_obj != 1) || 485 (num_acl_other != 1) || (num_acl_mask != 0 && num_acl_mask != 1)) 486 return (EINVAL); 487 if (((num_acl_group != 0) || (num_acl_user != 0)) && 488 (num_acl_mask != 1)) 489 return (EINVAL); 490 return (0); 491 } 492 493 /* 494 * These calls wrap the real vnode operations, and are called by the 495 * syscall code once the syscall has converted the path or file 496 * descriptor to a vnode (unlocked). The aclp pointer is assumed 497 * still to point to userland, so this should not be consumed within 498 * the kernel except by syscall code. Other code should directly 499 * invoke VOP_{SET,GET}ACL. 500 */ 501 502 /* 503 * Given a vnode, set its ACL. 504 */ 505 static int 506 vacl_set_acl(struct proc *p, struct vnode *vp, acl_type_t type, 507 struct acl *aclp) 508 { 509 struct acl inkernacl; 510 int error; 511 512 error = copyin(aclp, &inkernacl, sizeof(struct acl)); 513 if (error) 514 return(error); 515 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 516 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 517 error = VOP_SETACL(vp, type, &inkernacl, p->p_ucred, p); 518 VOP_UNLOCK(vp, 0, p); 519 return(error); 520 } 521 522 /* 523 * Given a vnode, get its ACL. 524 */ 525 static int 526 vacl_get_acl(struct proc *p, struct vnode *vp, acl_type_t type, 527 struct acl *aclp) 528 { 529 struct acl inkernelacl; 530 int error; 531 532 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 533 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 534 error = VOP_GETACL(vp, type, &inkernelacl, p->p_ucred, p); 535 VOP_UNLOCK(vp, 0, p); 536 if (error == 0) 537 error = copyout(&inkernelacl, aclp, sizeof(struct acl)); 538 return (error); 539 } 540 541 /* 542 * Given a vnode, delete its ACL. 543 */ 544 static int 545 vacl_delete(struct proc *p, struct vnode *vp, acl_type_t type) 546 { 547 int error; 548 549 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 550 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 551 error = VOP_SETACL(vp, ACL_TYPE_DEFAULT, 0, p->p_ucred, p); 552 VOP_UNLOCK(vp, 0, p); 553 return (error); 554 } 555 556 /* 557 * Given a vnode, check whether an ACL is appropriate for it 558 */ 559 static int 560 vacl_aclcheck(struct proc *p, struct vnode *vp, acl_type_t type, 561 struct acl *aclp) 562 { 563 struct acl inkernelacl; 564 int error; 565 566 error = copyin(aclp, &inkernelacl, sizeof(struct acl)); 567 if (error) 568 return(error); 569 error = VOP_ACLCHECK(vp, type, &inkernelacl, p->p_ucred, p); 570 return (error); 571 } 572 573 /* 574 * syscalls -- convert the path/fd to a vnode, and call vacl_whatever. 575 * Don't need to lock, as the vacl_ code will get/release any locks 576 * required. 577 */ 578 579 /* 580 * Given a file path, get an ACL for it 581 */ 582 int 583 __acl_get_file(struct proc *p, struct __acl_get_file_args *uap) 584 { 585 struct nameidata nd; 586 int error; 587 588 /* what flags are required here -- possible not LOCKLEAF? */ 589 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 590 error = namei(&nd); 591 if (error) 592 return(error); 593 error = vacl_get_acl(p, nd.ni_vp, SCARG(uap, type), SCARG(uap, aclp)); 594 NDFREE(&nd, 0); 595 return (error); 596 } 597 598 /* 599 * Given a file path, set an ACL for it 600 */ 601 int 602 __acl_set_file(struct proc *p, struct __acl_set_file_args *uap) 603 { 604 struct nameidata nd; 605 int error; 606 607 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 608 error = namei(&nd); 609 if (error) 610 return(error); 611 error = vacl_set_acl(p, nd.ni_vp, SCARG(uap, type), SCARG(uap, aclp)); 612 NDFREE(&nd, 0); 613 return (error); 614 } 615 616 /* 617 * Given a file descriptor, get an ACL for it 618 */ 619 int 620 __acl_get_fd(struct proc *p, struct __acl_get_fd_args *uap) 621 { 622 struct file *fp; 623 int error; 624 625 error = getvnode(p->p_fd, SCARG(uap, filedes), &fp); 626 if (error) 627 return(error); 628 return vacl_get_acl(p, (struct vnode *)fp->f_data, SCARG(uap, type), 629 SCARG(uap, aclp)); 630 } 631 632 /* 633 * Given a file descriptor, set an ACL for it 634 */ 635 int 636 __acl_set_fd(struct proc *p, struct __acl_set_fd_args *uap) 637 { 638 struct file *fp; 639 int error; 640 641 error = getvnode(p->p_fd, SCARG(uap, filedes), &fp); 642 if (error) 643 return(error); 644 return vacl_set_acl(p, (struct vnode *)fp->f_data, SCARG(uap, type), 645 SCARG(uap, aclp)); 646 } 647 648 /* 649 * Given a file path, delete an ACL from it. 650 */ 651 int 652 __acl_delete_file(struct proc *p, struct __acl_delete_file_args *uap) 653 { 654 struct nameidata nd; 655 int error; 656 657 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 658 error = namei(&nd); 659 if (error) 660 return(error); 661 error = vacl_delete(p, nd.ni_vp, SCARG(uap, type)); 662 NDFREE(&nd, 0); 663 return (error); 664 } 665 666 /* 667 * Given a file path, delete an ACL from it. 668 */ 669 int 670 __acl_delete_fd(struct proc *p, struct __acl_delete_fd_args *uap) 671 { 672 struct file *fp; 673 int error; 674 675 error = getvnode(p->p_fd, SCARG(uap, filedes), &fp); 676 if (error) 677 return(error); 678 error = vacl_delete(p, (struct vnode *)fp->f_data, SCARG(uap, type)); 679 return (error); 680 } 681 682 /* 683 * Given a file path, check an ACL for it 684 */ 685 int 686 __acl_aclcheck_file(struct proc *p, struct __acl_aclcheck_file_args *uap) 687 { 688 struct nameidata nd; 689 int error; 690 691 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 692 error = namei(&nd); 693 if (error) 694 return(error); 695 error = vacl_aclcheck(p, nd.ni_vp, SCARG(uap, type), SCARG(uap, aclp)); 696 NDFREE(&nd, 0); 697 return (error); 698 } 699 700 /* 701 * Given a file descriptor, check an ACL for it 702 */ 703 int 704 __acl_aclcheck_fd(struct proc *p, struct __acl_aclcheck_fd_args *uap) 705 { 706 struct file *fp; 707 int error; 708 709 error = getvnode(p->p_fd, SCARG(uap, filedes), &fp); 710 if (error) 711 return(error); 712 return vacl_aclcheck(p, (struct vnode *)fp->f_data, SCARG(uap, type), 713 SCARG(uap, aclp)); 714 } 715