191f37dcbSRobert Watson /*- 23c67c23bSRobert Watson * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 391f37dcbSRobert Watson * All rights reserved. 491f37dcbSRobert Watson * 56d878543SRobert Watson * This software was developed by Robert Watson for the TrustedBSD Project. 66d878543SRobert Watson * 791f37dcbSRobert Watson * Redistribution and use in source and binary forms, with or without 891f37dcbSRobert Watson * modification, are permitted provided that the following conditions 991f37dcbSRobert Watson * are met: 1091f37dcbSRobert Watson * 1. Redistributions of source code must retain the above copyright 1191f37dcbSRobert Watson * notice, this list of conditions and the following disclaimer. 1291f37dcbSRobert Watson * 2. Redistributions in binary form must reproduce the above copyright 1391f37dcbSRobert Watson * notice, this list of conditions and the following disclaimer in the 1491f37dcbSRobert Watson * documentation and/or other materials provided with the distribution. 1591f37dcbSRobert Watson * 1691f37dcbSRobert Watson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1791f37dcbSRobert Watson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1891f37dcbSRobert Watson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1991f37dcbSRobert Watson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2091f37dcbSRobert Watson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2191f37dcbSRobert Watson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2291f37dcbSRobert Watson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2391f37dcbSRobert Watson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2491f37dcbSRobert Watson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2591f37dcbSRobert Watson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2691f37dcbSRobert Watson * SUCH DAMAGE. 2791f37dcbSRobert Watson */ 2891f37dcbSRobert Watson /* 295293465fSRobert Watson * Developed by the TrustedBSD Project. 305293465fSRobert Watson * Support for POSIX.1e access control lists. 3191f37dcbSRobert Watson */ 3291f37dcbSRobert Watson 33677b542eSDavid E. O'Brien #include <sys/cdefs.h> 34677b542eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 35677b542eSDavid E. O'Brien 36c86ca022SRobert Watson #include "opt_mac.h" 37c86ca022SRobert Watson 3891f37dcbSRobert Watson #include <sys/param.h> 3991f37dcbSRobert Watson #include <sys/systm.h> 4091f37dcbSRobert Watson #include <sys/sysproto.h> 4191f37dcbSRobert Watson #include <sys/kernel.h> 42c86ca022SRobert Watson #include <sys/mac.h> 4391f37dcbSRobert Watson #include <sys/malloc.h> 4491f37dcbSRobert Watson #include <sys/vnode.h> 4591f37dcbSRobert Watson #include <sys/lock.h> 46f708f4d1SMatthew Dillon #include <sys/mutex.h> 4791f37dcbSRobert Watson #include <sys/namei.h> 4891f37dcbSRobert Watson #include <sys/file.h> 4913438f68SAlfred Perlstein #include <sys/filedesc.h> 5091f37dcbSRobert Watson #include <sys/proc.h> 5191f37dcbSRobert Watson #include <sys/sysent.h> 5291f37dcbSRobert Watson #include <sys/errno.h> 5391f37dcbSRobert Watson #include <sys/stat.h> 5491f37dcbSRobert Watson #include <sys/acl.h> 5591f37dcbSRobert Watson 565293465fSRobert Watson MALLOC_DEFINE(M_ACL, "acl", "access control list"); 5791f37dcbSRobert Watson 58cbeb8402SRobert Watson static int vacl_set_acl(struct thread *td, struct vnode *vp, 59cbeb8402SRobert Watson acl_type_t type, struct acl *aclp); 60cbeb8402SRobert Watson static int vacl_get_acl(struct thread *td, struct vnode *vp, 61cbeb8402SRobert Watson acl_type_t type, struct acl *aclp); 62b40ce416SJulian Elischer static int vacl_aclcheck(struct thread *td, struct vnode *vp, 63b114e127SRobert Watson acl_type_t type, struct acl *aclp); 6491f37dcbSRobert Watson 6591f37dcbSRobert Watson /* 665293465fSRobert Watson * Implement a version of vaccess() that understands POSIX.1e ACL semantics. 675293465fSRobert Watson * Return 0 on success, else an errno value. Should be merged into 685293465fSRobert Watson * vaccess() eventually. 695293465fSRobert Watson */ 705293465fSRobert Watson int 71b114e127SRobert Watson vaccess_acl_posix1e(enum vtype type, uid_t file_uid, gid_t file_gid, 72b114e127SRobert Watson struct acl *acl, mode_t acc_mode, struct ucred *cred, int *privused) 735293465fSRobert Watson { 745293465fSRobert Watson struct acl_entry *acl_other, *acl_mask; 755293465fSRobert Watson mode_t dac_granted; 765293465fSRobert Watson mode_t cap_granted; 775293465fSRobert Watson mode_t acl_mask_granted; 785293465fSRobert Watson int group_matched, i; 795293465fSRobert Watson 805293465fSRobert Watson /* 815293465fSRobert Watson * Look for a normal, non-privileged way to access the file/directory 825293465fSRobert Watson * as requested. If it exists, go with that. Otherwise, attempt 835293465fSRobert Watson * to use privileges granted via cap_granted. In some cases, 845293465fSRobert Watson * which privileges to use may be ambiguous due to "best match", 855293465fSRobert Watson * in which case fall back on first match for the time being. 865293465fSRobert Watson */ 875293465fSRobert Watson if (privused != NULL) 885293465fSRobert Watson *privused = 0; 895293465fSRobert Watson 905293465fSRobert Watson /* 915293465fSRobert Watson * Determine privileges now, but don't apply until we've found 92670f6b2fSRobert Watson * a DAC entry that matches but has failed to allow access. 935293465fSRobert Watson */ 945293465fSRobert Watson #ifndef CAPABILITIES 9544731cabSJohn Baldwin if (suser_cred(cred, PRISON_ROOT) == 0) 96b02aac46SRobert Watson cap_granted = VALLPERM; 975293465fSRobert Watson else 985293465fSRobert Watson cap_granted = 0; 995293465fSRobert Watson #else 1005293465fSRobert Watson cap_granted = 0; 1015293465fSRobert Watson 1025293465fSRobert Watson if (type == VDIR) { 1035293465fSRobert Watson if ((acc_mode & VEXEC) && !cap_check(cred, NULL, 1045293465fSRobert Watson CAP_DAC_READ_SEARCH, PRISON_ROOT)) 1055293465fSRobert Watson cap_granted |= VEXEC; 1065293465fSRobert Watson } else { 1075293465fSRobert Watson if ((acc_mode & VEXEC) && !cap_check(cred, NULL, 1085293465fSRobert Watson CAP_DAC_EXECUTE, PRISON_ROOT)) 1095293465fSRobert Watson cap_granted |= VEXEC; 1105293465fSRobert Watson } 1115293465fSRobert Watson 1125293465fSRobert Watson if ((acc_mode & VREAD) && !cap_check(cred, NULL, CAP_DAC_READ_SEARCH, 1135293465fSRobert Watson PRISON_ROOT)) 1145293465fSRobert Watson cap_granted |= VREAD; 1155293465fSRobert Watson 116b02aac46SRobert Watson if (((acc_mode & VWRITE) || (acc_mode & VAPPEND)) && 117b02aac46SRobert Watson !cap_check(cred, NULL, CAP_DAC_WRITE, PRISON_ROOT)) 118b02aac46SRobert Watson cap_granted |= (VWRITE | VAPPEND); 1195293465fSRobert Watson 1205293465fSRobert Watson if ((acc_mode & VADMIN) && !cap_check(cred, NULL, CAP_FOWNER, 1215293465fSRobert Watson PRISON_ROOT)) 1225293465fSRobert Watson cap_granted |= VADMIN; 1235293465fSRobert Watson #endif /* CAPABILITIES */ 1245293465fSRobert Watson 1255293465fSRobert Watson /* 126670f6b2fSRobert Watson * The owner matches if the effective uid associated with the 127670f6b2fSRobert Watson * credential matches that of the ACL_USER_OBJ entry. While we're 128670f6b2fSRobert Watson * doing the first scan, also cache the location of the ACL_MASK 129670f6b2fSRobert Watson * and ACL_OTHER entries, preventing some future iterations. 1305293465fSRobert Watson */ 1315293465fSRobert Watson acl_mask = acl_other = NULL; 1325293465fSRobert Watson for (i = 0; i < acl->acl_cnt; i++) { 1335293465fSRobert Watson switch (acl->acl_entry[i].ae_tag) { 1345293465fSRobert Watson case ACL_USER_OBJ: 135b114e127SRobert Watson if (file_uid != cred->cr_uid) 1365293465fSRobert Watson break; 1375293465fSRobert Watson dac_granted = 0; 1385293465fSRobert Watson dac_granted |= VADMIN; 139fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 1405293465fSRobert Watson dac_granted |= VEXEC; 141fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_READ) 1425293465fSRobert Watson dac_granted |= VREAD; 143fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_WRITE) 144b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 1455293465fSRobert Watson if ((acc_mode & dac_granted) == acc_mode) 1465293465fSRobert Watson return (0); 1475293465fSRobert Watson if ((acc_mode & (dac_granted | cap_granted)) == 1485293465fSRobert Watson acc_mode) { 1495293465fSRobert Watson if (privused != NULL) 1505293465fSRobert Watson *privused = 1; 1515293465fSRobert Watson return (0); 1525293465fSRobert Watson } 1535293465fSRobert Watson goto error; 1545293465fSRobert Watson 1555293465fSRobert Watson case ACL_MASK: 1565293465fSRobert Watson acl_mask = &acl->acl_entry[i]; 1575293465fSRobert Watson break; 1585293465fSRobert Watson 1595293465fSRobert Watson case ACL_OTHER: 1605293465fSRobert Watson acl_other = &acl->acl_entry[i]; 1615293465fSRobert Watson break; 1625293465fSRobert Watson 1635293465fSRobert Watson default: 16430171114SPeter Wemm break; 1655293465fSRobert Watson } 1665293465fSRobert Watson } 1675293465fSRobert Watson 1685293465fSRobert Watson /* 169670f6b2fSRobert Watson * An ACL_OTHER entry should always exist in a valid access 170670f6b2fSRobert Watson * ACL. If it doesn't, then generate a serious failure. For now, 171670f6b2fSRobert Watson * this means a debugging message and EPERM, but in the future 172670f6b2fSRobert Watson * should probably be a panic. 173670f6b2fSRobert Watson */ 174670f6b2fSRobert Watson if (acl_other == NULL) { 175670f6b2fSRobert Watson /* 176670f6b2fSRobert Watson * XXX This should never happen 177670f6b2fSRobert Watson */ 178670f6b2fSRobert Watson printf("vaccess_acl_posix1e: ACL_OTHER missing\n"); 179670f6b2fSRobert Watson return (EPERM); 180670f6b2fSRobert Watson } 181670f6b2fSRobert Watson 182670f6b2fSRobert Watson /* 1835293465fSRobert Watson * Checks against ACL_USER, ACL_GROUP_OBJ, and ACL_GROUP fields 1845293465fSRobert Watson * are masked by an ACL_MASK entry, if any. As such, first identify 1855293465fSRobert Watson * the ACL_MASK field, then iterate through identifying potential 1865293465fSRobert Watson * user matches, then group matches. If there is no ACL_MASK, 1875293465fSRobert Watson * assume that the mask allows all requests to succeed. 1885293465fSRobert Watson */ 1895293465fSRobert Watson if (acl_mask != NULL) { 1905293465fSRobert Watson acl_mask_granted = 0; 191fb1af1f2SChris D. Faulhaber if (acl_mask->ae_perm & ACL_EXECUTE) 1925293465fSRobert Watson acl_mask_granted |= VEXEC; 193fb1af1f2SChris D. Faulhaber if (acl_mask->ae_perm & ACL_READ) 1945293465fSRobert Watson acl_mask_granted |= VREAD; 195fb1af1f2SChris D. Faulhaber if (acl_mask->ae_perm & ACL_WRITE) 196b02aac46SRobert Watson acl_mask_granted |= (VWRITE | VAPPEND); 1975293465fSRobert Watson } else 198b02aac46SRobert Watson acl_mask_granted = VEXEC | VREAD | VWRITE | VAPPEND; 1995293465fSRobert Watson 2005293465fSRobert Watson /* 201670f6b2fSRobert Watson * Iterate through user ACL entries. Do checks twice, first 202670f6b2fSRobert Watson * without privilege, and then if a match is found but failed, 203670f6b2fSRobert Watson * a second time with privilege. 2045293465fSRobert Watson */ 2055293465fSRobert Watson 2065293465fSRobert Watson /* 2075293465fSRobert Watson * Check ACL_USER ACL entries. 2085293465fSRobert Watson */ 2095293465fSRobert Watson for (i = 0; i < acl->acl_cnt; i++) { 2105293465fSRobert Watson switch (acl->acl_entry[i].ae_tag) { 2115293465fSRobert Watson case ACL_USER: 2125293465fSRobert Watson if (acl->acl_entry[i].ae_id != cred->cr_uid) 2135293465fSRobert Watson break; 2145293465fSRobert Watson dac_granted = 0; 215fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 2165293465fSRobert Watson dac_granted |= VEXEC; 217fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_READ) 2185293465fSRobert Watson dac_granted |= VREAD; 219fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_WRITE) 220b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 2215293465fSRobert Watson dac_granted &= acl_mask_granted; 2225293465fSRobert Watson if ((acc_mode & dac_granted) == acc_mode) 2235293465fSRobert Watson return (0); 224b114e127SRobert Watson if ((acc_mode & (dac_granted | cap_granted)) != 225b114e127SRobert Watson acc_mode) 226b114e127SRobert Watson goto error; 227b114e127SRobert Watson 2285293465fSRobert Watson if (privused != NULL) 2295293465fSRobert Watson *privused = 1; 2305293465fSRobert Watson return (0); 2315293465fSRobert Watson } 2325293465fSRobert Watson } 2335293465fSRobert Watson 2345293465fSRobert Watson /* 2355293465fSRobert Watson * Group match is best-match, not first-match, so find a 2365293465fSRobert Watson * "best" match. Iterate across, testing each potential group 2375293465fSRobert Watson * match. Make sure we keep track of whether we found a match 238670f6b2fSRobert Watson * or not, so that we know if we should try again with any 239670f6b2fSRobert Watson * available privilege, or if we should move on to ACL_OTHER. 2405293465fSRobert Watson */ 2415293465fSRobert Watson group_matched = 0; 2425293465fSRobert Watson for (i = 0; i < acl->acl_cnt; i++) { 2435293465fSRobert Watson switch (acl->acl_entry[i].ae_tag) { 2445293465fSRobert Watson case ACL_GROUP_OBJ: 245e15480f8SThomas Moestl if (!groupmember(file_gid, cred)) 246b114e127SRobert Watson break; 2475293465fSRobert Watson dac_granted = 0; 248fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 2495293465fSRobert Watson dac_granted |= VEXEC; 250fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_READ) 2515293465fSRobert Watson dac_granted |= VREAD; 252fb1af1f2SChris D. Faulhaber if (acl->acl_entry[i].ae_perm & ACL_WRITE) 253b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 2545293465fSRobert Watson dac_granted &= acl_mask_granted; 2555293465fSRobert Watson 2565293465fSRobert Watson if ((acc_mode & dac_granted) == acc_mode) 2575293465fSRobert Watson return (0); 2585293465fSRobert Watson 2595293465fSRobert Watson group_matched = 1; 260b114e127SRobert Watson break; 261b114e127SRobert Watson 262b114e127SRobert Watson case ACL_GROUP: 263b114e127SRobert Watson if (!groupmember(acl->acl_entry[i].ae_id, cred)) 264b114e127SRobert Watson break; 265b114e127SRobert Watson dac_granted = 0; 266b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 267b114e127SRobert Watson dac_granted |= VEXEC; 268b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_READ) 269b114e127SRobert Watson dac_granted |= VREAD; 270b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_WRITE) 271b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 272b114e127SRobert Watson dac_granted &= acl_mask_granted; 273b114e127SRobert Watson 274b114e127SRobert Watson if ((acc_mode & dac_granted) == acc_mode) 275b114e127SRobert Watson return (0); 276b114e127SRobert Watson 277b114e127SRobert Watson group_matched = 1; 278b114e127SRobert Watson break; 279b114e127SRobert Watson 2805293465fSRobert Watson default: 28130171114SPeter Wemm break; 2825293465fSRobert Watson } 2835293465fSRobert Watson } 2845293465fSRobert Watson 2855293465fSRobert Watson if (group_matched == 1) { 2865293465fSRobert Watson /* 2875293465fSRobert Watson * There was a match, but it did not grant rights via 2885293465fSRobert Watson * pure DAC. Try again, this time with privilege. 2895293465fSRobert Watson */ 2905293465fSRobert Watson for (i = 0; i < acl->acl_cnt; i++) { 2915293465fSRobert Watson switch (acl->acl_entry[i].ae_tag) { 2925293465fSRobert Watson case ACL_GROUP_OBJ: 29346157a65SRobert Watson if (!groupmember(file_gid, cred)) 294b114e127SRobert Watson break; 2955293465fSRobert Watson dac_granted = 0; 296b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 2975293465fSRobert Watson dac_granted |= VEXEC; 298b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_READ) 2995293465fSRobert Watson dac_granted |= VREAD; 300b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_WRITE) 301b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 3025293465fSRobert Watson dac_granted &= acl_mask_granted; 303b114e127SRobert Watson 304b114e127SRobert Watson if ((acc_mode & (dac_granted | cap_granted)) != 305b114e127SRobert Watson acc_mode) 306b114e127SRobert Watson break; 307b114e127SRobert Watson 3085293465fSRobert Watson if (privused != NULL) 3095293465fSRobert Watson *privused = 1; 3105293465fSRobert Watson return (0); 311b114e127SRobert Watson 312b114e127SRobert Watson case ACL_GROUP: 313b114e127SRobert Watson if (!groupmember(acl->acl_entry[i].ae_id, 314b114e127SRobert Watson cred)) 315b114e127SRobert Watson break; 316b114e127SRobert Watson dac_granted = 0; 317b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_EXECUTE) 318b114e127SRobert Watson dac_granted |= VEXEC; 319b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_READ) 320b114e127SRobert Watson dac_granted |= VREAD; 321b114e127SRobert Watson if (acl->acl_entry[i].ae_perm & ACL_WRITE) 322b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 323b114e127SRobert Watson dac_granted &= acl_mask_granted; 324b114e127SRobert Watson 325b114e127SRobert Watson if ((acc_mode & (dac_granted | cap_granted)) != 326b114e127SRobert Watson acc_mode) 327b114e127SRobert Watson break; 328b114e127SRobert Watson 329b114e127SRobert Watson if (privused != NULL) 330b114e127SRobert Watson *privused = 1; 331b114e127SRobert Watson return (0); 332b114e127SRobert Watson 3335293465fSRobert Watson default: 33430171114SPeter Wemm break; 3355293465fSRobert Watson } 3365293465fSRobert Watson } 3375293465fSRobert Watson /* 3385293465fSRobert Watson * Even with privilege, group membership was not sufficient. 3395293465fSRobert Watson * Return failure. 3405293465fSRobert Watson */ 3415293465fSRobert Watson goto error; 3425293465fSRobert Watson } 3435293465fSRobert Watson 3445293465fSRobert Watson /* 3455293465fSRobert Watson * Fall back on ACL_OTHER. ACL_MASK is not applied to ACL_OTHER. 3465293465fSRobert Watson */ 3475293465fSRobert Watson dac_granted = 0; 348fb1af1f2SChris D. Faulhaber if (acl_other->ae_perm & ACL_EXECUTE) 3495293465fSRobert Watson dac_granted |= VEXEC; 350fb1af1f2SChris D. Faulhaber if (acl_other->ae_perm & ACL_READ) 3515293465fSRobert Watson dac_granted |= VREAD; 352fb1af1f2SChris D. Faulhaber if (acl_other->ae_perm & ACL_WRITE) 353b02aac46SRobert Watson dac_granted |= (VWRITE | VAPPEND); 3545293465fSRobert Watson 3555293465fSRobert Watson if ((acc_mode & dac_granted) == acc_mode) 3565293465fSRobert Watson return (0); 3575293465fSRobert Watson if ((acc_mode & (dac_granted | cap_granted)) == acc_mode) { 3585293465fSRobert Watson if (privused != NULL) 3595293465fSRobert Watson *privused = 1; 3605293465fSRobert Watson return (0); 3615293465fSRobert Watson } 3625293465fSRobert Watson 3635293465fSRobert Watson error: 3645293465fSRobert Watson return ((acc_mode & VADMIN) ? EPERM : EACCES); 3655293465fSRobert Watson } 3665293465fSRobert Watson 3675293465fSRobert Watson /* 3685293465fSRobert Watson * For the purposes of filesystems maintaining the _OBJ entries in an 3695293465fSRobert Watson * inode with a mode_t field, this routine converts a mode_t entry 3705293465fSRobert Watson * to an acl_perm_t. 3715293465fSRobert Watson */ 3725293465fSRobert Watson acl_perm_t 3735293465fSRobert Watson acl_posix1e_mode_to_perm(acl_tag_t tag, mode_t mode) 3745293465fSRobert Watson { 3755293465fSRobert Watson acl_perm_t perm = 0; 3765293465fSRobert Watson 3775293465fSRobert Watson switch(tag) { 3785293465fSRobert Watson case ACL_USER_OBJ: 3795293465fSRobert Watson if (mode & S_IXUSR) 380fb1af1f2SChris D. Faulhaber perm |= ACL_EXECUTE; 3815293465fSRobert Watson if (mode & S_IRUSR) 382fb1af1f2SChris D. Faulhaber perm |= ACL_READ; 3835293465fSRobert Watson if (mode & S_IWUSR) 384fb1af1f2SChris D. Faulhaber perm |= ACL_WRITE; 3855293465fSRobert Watson return (perm); 3865293465fSRobert Watson 3875293465fSRobert Watson case ACL_GROUP_OBJ: 3885293465fSRobert Watson if (mode & S_IXGRP) 389fb1af1f2SChris D. Faulhaber perm |= ACL_EXECUTE; 3905293465fSRobert Watson if (mode & S_IRGRP) 391fb1af1f2SChris D. Faulhaber perm |= ACL_READ; 3925293465fSRobert Watson if (mode & S_IWGRP) 393fb1af1f2SChris D. Faulhaber perm |= ACL_WRITE; 3945293465fSRobert Watson return (perm); 3955293465fSRobert Watson 3965293465fSRobert Watson case ACL_OTHER: 3975293465fSRobert Watson if (mode & S_IXOTH) 398fb1af1f2SChris D. Faulhaber perm |= ACL_EXECUTE; 3995293465fSRobert Watson if (mode & S_IROTH) 400fb1af1f2SChris D. Faulhaber perm |= ACL_READ; 4015293465fSRobert Watson if (mode & S_IWOTH) 402fb1af1f2SChris D. Faulhaber perm |= ACL_WRITE; 4035293465fSRobert Watson return (perm); 4045293465fSRobert Watson 4055293465fSRobert Watson default: 4065293465fSRobert Watson printf("acl_posix1e_mode_to_perm: invalid tag (%d)\n", tag); 4075293465fSRobert Watson return (0); 4085293465fSRobert Watson } 4095293465fSRobert Watson } 4105293465fSRobert Watson 4115293465fSRobert Watson /* 4125293465fSRobert Watson * Given inode information (uid, gid, mode), return an acl entry of the 4135293465fSRobert Watson * appropriate type. 4145293465fSRobert Watson */ 4155293465fSRobert Watson struct acl_entry 4165293465fSRobert Watson acl_posix1e_mode_to_entry(acl_tag_t tag, uid_t uid, gid_t gid, mode_t mode) 4175293465fSRobert Watson { 4185293465fSRobert Watson struct acl_entry acl_entry; 4195293465fSRobert Watson 4205293465fSRobert Watson acl_entry.ae_tag = tag; 4215293465fSRobert Watson acl_entry.ae_perm = acl_posix1e_mode_to_perm(tag, mode); 4225293465fSRobert Watson switch(tag) { 4235293465fSRobert Watson case ACL_USER_OBJ: 4245293465fSRobert Watson acl_entry.ae_id = uid; 4255293465fSRobert Watson break; 4265293465fSRobert Watson 4275293465fSRobert Watson case ACL_GROUP_OBJ: 4285293465fSRobert Watson acl_entry.ae_id = gid; 4295293465fSRobert Watson break; 4305293465fSRobert Watson 4315293465fSRobert Watson case ACL_OTHER: 432dbb14f98SChris D. Faulhaber acl_entry.ae_id = ACL_UNDEFINED_ID; 4335293465fSRobert Watson break; 4345293465fSRobert Watson 4355293465fSRobert Watson default: 436dbb14f98SChris D. Faulhaber acl_entry.ae_id = ACL_UNDEFINED_ID; 4375293465fSRobert Watson printf("acl_posix1e_mode_to_entry: invalid tag (%d)\n", tag); 4385293465fSRobert Watson } 4395293465fSRobert Watson 4405293465fSRobert Watson return (acl_entry); 4415293465fSRobert Watson } 4425293465fSRobert Watson 4435293465fSRobert Watson /* 4445293465fSRobert Watson * Utility function to generate a file mode given appropriate ACL entries. 4455293465fSRobert Watson */ 4465293465fSRobert Watson mode_t 4475293465fSRobert Watson acl_posix1e_perms_to_mode(struct acl_entry *acl_user_obj_entry, 4485293465fSRobert Watson struct acl_entry *acl_group_obj_entry, struct acl_entry *acl_other_entry) 4495293465fSRobert Watson { 4505293465fSRobert Watson mode_t mode; 4515293465fSRobert Watson 4525293465fSRobert Watson mode = 0; 453fb1af1f2SChris D. Faulhaber if (acl_user_obj_entry->ae_perm & ACL_EXECUTE) 4545293465fSRobert Watson mode |= S_IXUSR; 455fb1af1f2SChris D. Faulhaber if (acl_user_obj_entry->ae_perm & ACL_READ) 4565293465fSRobert Watson mode |= S_IRUSR; 457fb1af1f2SChris D. Faulhaber if (acl_user_obj_entry->ae_perm & ACL_WRITE) 4585293465fSRobert Watson mode |= S_IWUSR; 459fb1af1f2SChris D. Faulhaber if (acl_group_obj_entry->ae_perm & ACL_EXECUTE) 4605293465fSRobert Watson mode |= S_IXGRP; 461fb1af1f2SChris D. Faulhaber if (acl_group_obj_entry->ae_perm & ACL_READ) 4625293465fSRobert Watson mode |= S_IRGRP; 463fb1af1f2SChris D. Faulhaber if (acl_group_obj_entry->ae_perm & ACL_WRITE) 4645293465fSRobert Watson mode |= S_IWGRP; 465fb1af1f2SChris D. Faulhaber if (acl_other_entry->ae_perm & ACL_EXECUTE) 4665293465fSRobert Watson mode |= S_IXOTH; 467fb1af1f2SChris D. Faulhaber if (acl_other_entry->ae_perm & ACL_READ) 4685293465fSRobert Watson mode |= S_IROTH; 469fb1af1f2SChris D. Faulhaber if (acl_other_entry->ae_perm & ACL_WRITE) 4705293465fSRobert Watson mode |= S_IWOTH; 4715293465fSRobert Watson 4725293465fSRobert Watson return (mode); 4735293465fSRobert Watson } 4745293465fSRobert Watson 4755293465fSRobert Watson /* 4765293465fSRobert Watson * Perform a syntactic check of the ACL, sufficient to allow an 4775293465fSRobert Watson * implementing filesystem to determine if it should accept this and 4785293465fSRobert Watson * rely on the POSIX.1e ACL properties. 4795293465fSRobert Watson */ 4805293465fSRobert Watson int 4815293465fSRobert Watson acl_posix1e_check(struct acl *acl) 4825293465fSRobert Watson { 4835293465fSRobert Watson int num_acl_user_obj, num_acl_user, num_acl_group_obj, num_acl_group; 4845293465fSRobert Watson int num_acl_mask, num_acl_other, i; 4855293465fSRobert Watson 4865293465fSRobert Watson /* 4875293465fSRobert Watson * Verify that the number of entries does not exceed the maximum 4885293465fSRobert Watson * defined for acl_t. 4895293465fSRobert Watson * Verify that the correct number of various sorts of ae_tags are 4905293465fSRobert Watson * present: 4915293465fSRobert Watson * Exactly one ACL_USER_OBJ 4925293465fSRobert Watson * Exactly one ACL_GROUP_OBJ 4935293465fSRobert Watson * Exactly one ACL_OTHER 4945293465fSRobert Watson * If any ACL_USER or ACL_GROUP entries appear, then exactly one 4955293465fSRobert Watson * ACL_MASK entry must also appear. 4965293465fSRobert Watson * Verify that all ae_perm entries are in ACL_PERM_BITS. 4975293465fSRobert Watson * Verify all ae_tag entries are understood by this implementation. 4985293465fSRobert Watson * Note: Does not check for uniqueness of qualifier (ae_id) field. 4995293465fSRobert Watson */ 5005293465fSRobert Watson num_acl_user_obj = num_acl_user = num_acl_group_obj = num_acl_group = 5015293465fSRobert Watson num_acl_mask = num_acl_other = 0; 5025293465fSRobert Watson if (acl->acl_cnt > ACL_MAX_ENTRIES || acl->acl_cnt < 0) 5035293465fSRobert Watson return (EINVAL); 5045293465fSRobert Watson for (i = 0; i < acl->acl_cnt; i++) { 5055293465fSRobert Watson /* 5065293465fSRobert Watson * Check for a valid tag. 5075293465fSRobert Watson */ 5085293465fSRobert Watson switch(acl->acl_entry[i].ae_tag) { 5095293465fSRobert Watson case ACL_USER_OBJ: 510b114e127SRobert Watson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */ 511b114e127SRobert Watson if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID) 512b114e127SRobert Watson return (EINVAL); 5135293465fSRobert Watson num_acl_user_obj++; 5145293465fSRobert Watson break; 5155293465fSRobert Watson case ACL_GROUP_OBJ: 516b114e127SRobert Watson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */ 517b114e127SRobert Watson if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID) 518b114e127SRobert Watson return (EINVAL); 5195293465fSRobert Watson num_acl_group_obj++; 5205293465fSRobert Watson break; 5215293465fSRobert Watson case ACL_USER: 522b114e127SRobert Watson if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID) 523b114e127SRobert Watson return (EINVAL); 5245293465fSRobert Watson num_acl_user++; 5255293465fSRobert Watson break; 5265293465fSRobert Watson case ACL_GROUP: 527b114e127SRobert Watson if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID) 528b114e127SRobert Watson return (EINVAL); 5295293465fSRobert Watson num_acl_group++; 5305293465fSRobert Watson break; 5315293465fSRobert Watson case ACL_OTHER: 532b114e127SRobert Watson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */ 533b114e127SRobert Watson if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID) 534b114e127SRobert Watson return (EINVAL); 5355293465fSRobert Watson num_acl_other++; 5365293465fSRobert Watson break; 5375293465fSRobert Watson case ACL_MASK: 538b114e127SRobert Watson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */ 539b114e127SRobert Watson if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID) 540b114e127SRobert Watson return (EINVAL); 5415293465fSRobert Watson num_acl_mask++; 5425293465fSRobert Watson break; 5435293465fSRobert Watson default: 5445293465fSRobert Watson return (EINVAL); 5455293465fSRobert Watson } 5465293465fSRobert Watson /* 5475293465fSRobert Watson * Check for valid perm entries. 5485293465fSRobert Watson */ 5495293465fSRobert Watson if ((acl->acl_entry[i].ae_perm | ACL_PERM_BITS) != 5505293465fSRobert Watson ACL_PERM_BITS) 5515293465fSRobert Watson return (EINVAL); 5525293465fSRobert Watson } 5535293465fSRobert Watson if ((num_acl_user_obj != 1) || (num_acl_group_obj != 1) || 5545293465fSRobert Watson (num_acl_other != 1) || (num_acl_mask != 0 && num_acl_mask != 1)) 5555293465fSRobert Watson return (EINVAL); 5565293465fSRobert Watson if (((num_acl_group != 0) || (num_acl_user != 0)) && 5575293465fSRobert Watson (num_acl_mask != 1)) 5585293465fSRobert Watson return (EINVAL); 5595293465fSRobert Watson return (0); 5605293465fSRobert Watson } 5615293465fSRobert Watson 5625293465fSRobert Watson /* 56391f37dcbSRobert Watson * These calls wrap the real vnode operations, and are called by the 56491f37dcbSRobert Watson * syscall code once the syscall has converted the path or file 56591f37dcbSRobert Watson * descriptor to a vnode (unlocked). The aclp pointer is assumed 56691f37dcbSRobert Watson * still to point to userland, so this should not be consumed within 56791f37dcbSRobert Watson * the kernel except by syscall code. Other code should directly 56891f37dcbSRobert Watson * invoke VOP_{SET,GET}ACL. 56991f37dcbSRobert Watson */ 57091f37dcbSRobert Watson 57191f37dcbSRobert Watson /* 57291f37dcbSRobert Watson * Given a vnode, set its ACL. 57391f37dcbSRobert Watson */ 57491f37dcbSRobert Watson static int 575b40ce416SJulian Elischer vacl_set_acl(struct thread *td, struct vnode *vp, acl_type_t type, 57691f37dcbSRobert Watson struct acl *aclp) 57791f37dcbSRobert Watson { 57891f37dcbSRobert Watson struct acl inkernacl; 5794e1123c7SRobert Watson struct mount *mp; 58091f37dcbSRobert Watson int error; 58191f37dcbSRobert Watson 58291f37dcbSRobert Watson error = copyin(aclp, &inkernacl, sizeof(struct acl)); 58391f37dcbSRobert Watson if (error) 58491f37dcbSRobert Watson return(error); 5854e1123c7SRobert Watson error = vn_start_write(vp, &mp, V_WAIT | PCATCH); 5864e1123c7SRobert Watson if (error != 0) 5874e1123c7SRobert Watson return (error); 588a854ed98SJohn Baldwin VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE); 589b40ce416SJulian Elischer vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 590c86ca022SRobert Watson #ifdef MAC 591c86ca022SRobert Watson error = mac_check_vnode_setacl(td->td_ucred, vp, type, &inkernacl); 592c86ca022SRobert Watson if (error != 0) 593c86ca022SRobert Watson goto out; 594c86ca022SRobert Watson #endif 595a854ed98SJohn Baldwin error = VOP_SETACL(vp, type, &inkernacl, td->td_ucred, td); 596c86ca022SRobert Watson #ifdef MAC 597c86ca022SRobert Watson out: 598c86ca022SRobert Watson #endif 599b40ce416SJulian Elischer VOP_UNLOCK(vp, 0, td); 6004e1123c7SRobert Watson vn_finished_write(mp); 60191f37dcbSRobert Watson return(error); 60291f37dcbSRobert Watson } 60391f37dcbSRobert Watson 60491f37dcbSRobert Watson /* 60591f37dcbSRobert Watson * Given a vnode, get its ACL. 60691f37dcbSRobert Watson */ 60791f37dcbSRobert Watson static int 608b40ce416SJulian Elischer vacl_get_acl(struct thread *td, struct vnode *vp, acl_type_t type, 60991f37dcbSRobert Watson struct acl *aclp) 61091f37dcbSRobert Watson { 61191f37dcbSRobert Watson struct acl inkernelacl; 61291f37dcbSRobert Watson int error; 61391f37dcbSRobert Watson 614a854ed98SJohn Baldwin VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE); 615b40ce416SJulian Elischer vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 616c86ca022SRobert Watson #ifdef MAC 617c86ca022SRobert Watson error = mac_check_vnode_getacl(td->td_ucred, vp, type); 618c86ca022SRobert Watson if (error != 0) 619c86ca022SRobert Watson goto out; 620c86ca022SRobert Watson #endif 621a854ed98SJohn Baldwin error = VOP_GETACL(vp, type, &inkernelacl, td->td_ucred, td); 622c86ca022SRobert Watson #ifdef MAC 623c86ca022SRobert Watson out: 624c86ca022SRobert Watson #endif 625b40ce416SJulian Elischer VOP_UNLOCK(vp, 0, td); 62691f37dcbSRobert Watson if (error == 0) 62791f37dcbSRobert Watson error = copyout(&inkernelacl, aclp, sizeof(struct acl)); 62891f37dcbSRobert Watson return (error); 62991f37dcbSRobert Watson } 63091f37dcbSRobert Watson 63191f37dcbSRobert Watson /* 63291f37dcbSRobert Watson * Given a vnode, delete its ACL. 63391f37dcbSRobert Watson */ 63491f37dcbSRobert Watson static int 635b40ce416SJulian Elischer vacl_delete(struct thread *td, struct vnode *vp, acl_type_t type) 63691f37dcbSRobert Watson { 6374e1123c7SRobert Watson struct mount *mp; 63891f37dcbSRobert Watson int error; 63991f37dcbSRobert Watson 6404e1123c7SRobert Watson error = vn_start_write(vp, &mp, V_WAIT | PCATCH); 6414e1123c7SRobert Watson if (error) 6424e1123c7SRobert Watson return (error); 643a854ed98SJohn Baldwin VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE); 644b40ce416SJulian Elischer vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 645c86ca022SRobert Watson #ifdef MAC 646c86ca022SRobert Watson error = mac_check_vnode_deleteacl(td->td_ucred, vp, type); 647c86ca022SRobert Watson if (error) 648c86ca022SRobert Watson goto out; 649c86ca022SRobert Watson #endif 650c86ca022SRobert Watson error = VOP_SETACL(vp, type, 0, td->td_ucred, td); 651c86ca022SRobert Watson #ifdef MAC 652c86ca022SRobert Watson out: 653c86ca022SRobert Watson #endif 654b40ce416SJulian Elischer VOP_UNLOCK(vp, 0, td); 6554e1123c7SRobert Watson vn_finished_write(mp); 65691f37dcbSRobert Watson return (error); 65791f37dcbSRobert Watson } 65891f37dcbSRobert Watson 65991f37dcbSRobert Watson /* 66091f37dcbSRobert Watson * Given a vnode, check whether an ACL is appropriate for it 66191f37dcbSRobert Watson */ 66291f37dcbSRobert Watson static int 663b40ce416SJulian Elischer vacl_aclcheck(struct thread *td, struct vnode *vp, acl_type_t type, 66491f37dcbSRobert Watson struct acl *aclp) 66591f37dcbSRobert Watson { 66691f37dcbSRobert Watson struct acl inkernelacl; 66791f37dcbSRobert Watson int error; 66891f37dcbSRobert Watson 66991f37dcbSRobert Watson error = copyin(aclp, &inkernelacl, sizeof(struct acl)); 67091f37dcbSRobert Watson if (error) 67191f37dcbSRobert Watson return(error); 672a854ed98SJohn Baldwin error = VOP_ACLCHECK(vp, type, &inkernelacl, td->td_ucred, td); 67391f37dcbSRobert Watson return (error); 67491f37dcbSRobert Watson } 67591f37dcbSRobert Watson 67691f37dcbSRobert Watson /* 67791f37dcbSRobert Watson * syscalls -- convert the path/fd to a vnode, and call vacl_whatever. 67891f37dcbSRobert Watson * Don't need to lock, as the vacl_ code will get/release any locks 67991f37dcbSRobert Watson * required. 68091f37dcbSRobert Watson */ 68191f37dcbSRobert Watson 68291f37dcbSRobert Watson /* 68391f37dcbSRobert Watson * Given a file path, get an ACL for it 684f708f4d1SMatthew Dillon * 685f708f4d1SMatthew Dillon * MPSAFE 68691f37dcbSRobert Watson */ 68791f37dcbSRobert Watson int 688b40ce416SJulian Elischer __acl_get_file(struct thread *td, struct __acl_get_file_args *uap) 68991f37dcbSRobert Watson { 69091f37dcbSRobert Watson struct nameidata nd; 69191f37dcbSRobert Watson int error; 69291f37dcbSRobert Watson 693f708f4d1SMatthew Dillon mtx_lock(&Giant); 694d1e405c5SAlfred Perlstein NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td); 69591f37dcbSRobert Watson error = namei(&nd); 696f708f4d1SMatthew Dillon if (error == 0) { 697f97182acSAlfred Perlstein error = vacl_get_acl(td, nd.ni_vp, uap->type, uap->aclp); 69891f37dcbSRobert Watson NDFREE(&nd, 0); 699f708f4d1SMatthew Dillon } 700f708f4d1SMatthew Dillon mtx_unlock(&Giant); 70191f37dcbSRobert Watson return (error); 70291f37dcbSRobert Watson } 70391f37dcbSRobert Watson 70491f37dcbSRobert Watson /* 7053c67c23bSRobert Watson * Given a file path, get an ACL for it; don't follow links. 7063c67c23bSRobert Watson * 7073c67c23bSRobert Watson * MPSAFE 7083c67c23bSRobert Watson */ 7093c67c23bSRobert Watson int 7103c67c23bSRobert Watson __acl_get_link(struct thread *td, struct __acl_get_link_args *uap) 7113c67c23bSRobert Watson { 7123c67c23bSRobert Watson struct nameidata nd; 7133c67c23bSRobert Watson int error; 7143c67c23bSRobert Watson 7153c67c23bSRobert Watson mtx_lock(&Giant); 7163c67c23bSRobert Watson NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td); 7173c67c23bSRobert Watson error = namei(&nd); 7183c67c23bSRobert Watson if (error == 0) { 7193c67c23bSRobert Watson error = vacl_get_acl(td, nd.ni_vp, uap->type, uap->aclp); 7203c67c23bSRobert Watson NDFREE(&nd, 0); 7213c67c23bSRobert Watson } 7223c67c23bSRobert Watson mtx_unlock(&Giant); 7233c67c23bSRobert Watson return (error); 7243c67c23bSRobert Watson } 7253c67c23bSRobert Watson 7263c67c23bSRobert Watson /* 72791f37dcbSRobert Watson * Given a file path, set an ACL for it 728f708f4d1SMatthew Dillon * 729f708f4d1SMatthew Dillon * MPSAFE 73091f37dcbSRobert Watson */ 73191f37dcbSRobert Watson int 732b40ce416SJulian Elischer __acl_set_file(struct thread *td, struct __acl_set_file_args *uap) 73391f37dcbSRobert Watson { 73491f37dcbSRobert Watson struct nameidata nd; 73591f37dcbSRobert Watson int error; 73691f37dcbSRobert Watson 737f708f4d1SMatthew Dillon mtx_lock(&Giant); 738d1e405c5SAlfred Perlstein NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td); 73991f37dcbSRobert Watson error = namei(&nd); 740f708f4d1SMatthew Dillon if (error == 0) { 741f97182acSAlfred Perlstein error = vacl_set_acl(td, nd.ni_vp, uap->type, uap->aclp); 74291f37dcbSRobert Watson NDFREE(&nd, 0); 743f708f4d1SMatthew Dillon } 744f708f4d1SMatthew Dillon mtx_unlock(&Giant); 74591f37dcbSRobert Watson return (error); 74691f37dcbSRobert Watson } 74791f37dcbSRobert Watson 74891f37dcbSRobert Watson /* 7493c67c23bSRobert Watson * Given a file path, set an ACL for it; don't follow links. 7503c67c23bSRobert Watson * 7513c67c23bSRobert Watson * MPSAFE 7523c67c23bSRobert Watson */ 7533c67c23bSRobert Watson int 7543c67c23bSRobert Watson __acl_set_link(struct thread *td, struct __acl_set_link_args *uap) 7553c67c23bSRobert Watson { 7563c67c23bSRobert Watson struct nameidata nd; 7573c67c23bSRobert Watson int error; 7583c67c23bSRobert Watson 7593c67c23bSRobert Watson mtx_lock(&Giant); 7603c67c23bSRobert Watson NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td); 7613c67c23bSRobert Watson error = namei(&nd); 7623c67c23bSRobert Watson if (error == 0) { 7633c67c23bSRobert Watson error = vacl_set_acl(td, nd.ni_vp, uap->type, uap->aclp); 7643c67c23bSRobert Watson NDFREE(&nd, 0); 7653c67c23bSRobert Watson } 7663c67c23bSRobert Watson mtx_unlock(&Giant); 7673c67c23bSRobert Watson return (error); 7683c67c23bSRobert Watson } 7693c67c23bSRobert Watson 7703c67c23bSRobert Watson /* 77191f37dcbSRobert Watson * Given a file descriptor, get an ACL for it 772f708f4d1SMatthew Dillon * 773f708f4d1SMatthew Dillon * MPSAFE 77491f37dcbSRobert Watson */ 77591f37dcbSRobert Watson int 776b40ce416SJulian Elischer __acl_get_fd(struct thread *td, struct __acl_get_fd_args *uap) 77791f37dcbSRobert Watson { 77891f37dcbSRobert Watson struct file *fp; 77991f37dcbSRobert Watson int error; 78091f37dcbSRobert Watson 781f708f4d1SMatthew Dillon mtx_lock(&Giant); 782d1e405c5SAlfred Perlstein error = getvnode(td->td_proc->p_fd, uap->filedes, &fp); 783f708f4d1SMatthew Dillon if (error == 0) { 7843b6d9652SPoul-Henning Kamp error = vacl_get_acl(td, fp->f_vnode, uap->type, uap->aclp); 785426da3bcSAlfred Perlstein fdrop(fp, td); 786f708f4d1SMatthew Dillon } 787f708f4d1SMatthew Dillon mtx_unlock(&Giant); 78891f37dcbSRobert Watson return (error); 78991f37dcbSRobert Watson } 79091f37dcbSRobert Watson 79191f37dcbSRobert Watson /* 79291f37dcbSRobert Watson * Given a file descriptor, set an ACL for it 793f708f4d1SMatthew Dillon * 794f708f4d1SMatthew Dillon * MPSAFE 79591f37dcbSRobert Watson */ 79691f37dcbSRobert Watson int 797b40ce416SJulian Elischer __acl_set_fd(struct thread *td, struct __acl_set_fd_args *uap) 79891f37dcbSRobert Watson { 79991f37dcbSRobert Watson struct file *fp; 80091f37dcbSRobert Watson int error; 80191f37dcbSRobert Watson 802f708f4d1SMatthew Dillon mtx_lock(&Giant); 803d1e405c5SAlfred Perlstein error = getvnode(td->td_proc->p_fd, uap->filedes, &fp); 804f708f4d1SMatthew Dillon if (error == 0) { 8053b6d9652SPoul-Henning Kamp error = vacl_set_acl(td, fp->f_vnode, uap->type, uap->aclp); 806426da3bcSAlfred Perlstein fdrop(fp, td); 807f708f4d1SMatthew Dillon } 808f708f4d1SMatthew Dillon mtx_unlock(&Giant); 80991f37dcbSRobert Watson return (error); 81091f37dcbSRobert Watson } 81191f37dcbSRobert Watson 81291f37dcbSRobert Watson /* 81391f37dcbSRobert Watson * Given a file path, delete an ACL from it. 814f708f4d1SMatthew Dillon * 815f708f4d1SMatthew Dillon * MPSAFE 81691f37dcbSRobert Watson */ 81791f37dcbSRobert Watson int 818b40ce416SJulian Elischer __acl_delete_file(struct thread *td, struct __acl_delete_file_args *uap) 81991f37dcbSRobert Watson { 82091f37dcbSRobert Watson struct nameidata nd; 82191f37dcbSRobert Watson int error; 82291f37dcbSRobert Watson 823f708f4d1SMatthew Dillon mtx_lock(&Giant); 824d1e405c5SAlfred Perlstein NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td); 82591f37dcbSRobert Watson error = namei(&nd); 826f708f4d1SMatthew Dillon if (error == 0) { 827d1e405c5SAlfred Perlstein error = vacl_delete(td, nd.ni_vp, uap->type); 82891f37dcbSRobert Watson NDFREE(&nd, 0); 829f708f4d1SMatthew Dillon } 830f708f4d1SMatthew Dillon mtx_unlock(&Giant); 83191f37dcbSRobert Watson return (error); 83291f37dcbSRobert Watson } 83391f37dcbSRobert Watson 83491f37dcbSRobert Watson /* 8353c67c23bSRobert Watson * Given a file path, delete an ACL from it; don't follow links. 8363c67c23bSRobert Watson * 8373c67c23bSRobert Watson * MPSAFE 8383c67c23bSRobert Watson */ 8393c67c23bSRobert Watson int 8403c67c23bSRobert Watson __acl_delete_link(struct thread *td, struct __acl_delete_link_args *uap) 8413c67c23bSRobert Watson { 8423c67c23bSRobert Watson struct nameidata nd; 8433c67c23bSRobert Watson int error; 8443c67c23bSRobert Watson 8453c67c23bSRobert Watson mtx_lock(&Giant); 8463c67c23bSRobert Watson NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td); 8473c67c23bSRobert Watson error = namei(&nd); 8483c67c23bSRobert Watson if (error == 0) { 8493c67c23bSRobert Watson error = vacl_delete(td, nd.ni_vp, uap->type); 8503c67c23bSRobert Watson NDFREE(&nd, 0); 8513c67c23bSRobert Watson } 8523c67c23bSRobert Watson mtx_unlock(&Giant); 8533c67c23bSRobert Watson return (error); 8543c67c23bSRobert Watson } 8553c67c23bSRobert Watson 8563c67c23bSRobert Watson /* 85791f37dcbSRobert Watson * Given a file path, delete an ACL from it. 858f708f4d1SMatthew Dillon * 859f708f4d1SMatthew Dillon * MPSAFE 86091f37dcbSRobert Watson */ 86191f37dcbSRobert Watson int 862b40ce416SJulian Elischer __acl_delete_fd(struct thread *td, struct __acl_delete_fd_args *uap) 86391f37dcbSRobert Watson { 86491f37dcbSRobert Watson struct file *fp; 86591f37dcbSRobert Watson int error; 86691f37dcbSRobert Watson 867f708f4d1SMatthew Dillon mtx_lock(&Giant); 868d1e405c5SAlfred Perlstein error = getvnode(td->td_proc->p_fd, uap->filedes, &fp); 869f708f4d1SMatthew Dillon if (error == 0) { 8703b6d9652SPoul-Henning Kamp error = vacl_delete(td, fp->f_vnode, uap->type); 871426da3bcSAlfred Perlstein fdrop(fp, td); 872f708f4d1SMatthew Dillon } 873f708f4d1SMatthew Dillon mtx_unlock(&Giant); 87491f37dcbSRobert Watson return (error); 87591f37dcbSRobert Watson } 87691f37dcbSRobert Watson 87791f37dcbSRobert Watson /* 87891f37dcbSRobert Watson * Given a file path, check an ACL for it 879f708f4d1SMatthew Dillon * 880f708f4d1SMatthew Dillon * MPSAFE 88191f37dcbSRobert Watson */ 88291f37dcbSRobert Watson int 883b40ce416SJulian Elischer __acl_aclcheck_file(struct thread *td, struct __acl_aclcheck_file_args *uap) 88491f37dcbSRobert Watson { 88591f37dcbSRobert Watson struct nameidata nd; 88691f37dcbSRobert Watson int error; 88791f37dcbSRobert Watson 888f708f4d1SMatthew Dillon mtx_lock(&Giant); 889d1e405c5SAlfred Perlstein NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td); 89091f37dcbSRobert Watson error = namei(&nd); 891f708f4d1SMatthew Dillon if (error == 0) { 892f97182acSAlfred Perlstein error = vacl_aclcheck(td, nd.ni_vp, uap->type, uap->aclp); 89391f37dcbSRobert Watson NDFREE(&nd, 0); 894f708f4d1SMatthew Dillon } 895f708f4d1SMatthew Dillon mtx_unlock(&Giant); 89691f37dcbSRobert Watson return (error); 89791f37dcbSRobert Watson } 89891f37dcbSRobert Watson 89991f37dcbSRobert Watson /* 9003c67c23bSRobert Watson * Given a file path, check an ACL for it; don't follow links. 9013c67c23bSRobert Watson * 9023c67c23bSRobert Watson * MPSAFE 9033c67c23bSRobert Watson */ 9043c67c23bSRobert Watson int 9053c67c23bSRobert Watson __acl_aclcheck_link(struct thread *td, struct __acl_aclcheck_link_args *uap) 9063c67c23bSRobert Watson { 9073c67c23bSRobert Watson struct nameidata nd; 9083c67c23bSRobert Watson int error; 9093c67c23bSRobert Watson 9103c67c23bSRobert Watson mtx_lock(&Giant); 9113c67c23bSRobert Watson NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td); 9123c67c23bSRobert Watson error = namei(&nd); 9133c67c23bSRobert Watson if (error == 0) { 9143c67c23bSRobert Watson error = vacl_aclcheck(td, nd.ni_vp, uap->type, uap->aclp); 9153c67c23bSRobert Watson NDFREE(&nd, 0); 9163c67c23bSRobert Watson } 9173c67c23bSRobert Watson mtx_unlock(&Giant); 9183c67c23bSRobert Watson return (error); 9193c67c23bSRobert Watson } 9203c67c23bSRobert Watson 9213c67c23bSRobert Watson /* 92291f37dcbSRobert Watson * Given a file descriptor, check an ACL for it 923f708f4d1SMatthew Dillon * 924f708f4d1SMatthew Dillon * MPSAFE 92591f37dcbSRobert Watson */ 92691f37dcbSRobert Watson int 927b40ce416SJulian Elischer __acl_aclcheck_fd(struct thread *td, struct __acl_aclcheck_fd_args *uap) 92891f37dcbSRobert Watson { 92991f37dcbSRobert Watson struct file *fp; 93091f37dcbSRobert Watson int error; 93191f37dcbSRobert Watson 932f708f4d1SMatthew Dillon mtx_lock(&Giant); 933d1e405c5SAlfred Perlstein error = getvnode(td->td_proc->p_fd, uap->filedes, &fp); 934f708f4d1SMatthew Dillon if (error == 0) { 9353b6d9652SPoul-Henning Kamp error = vacl_aclcheck(td, fp->f_vnode, uap->type, uap->aclp); 936426da3bcSAlfred Perlstein fdrop(fp, td); 937f708f4d1SMatthew Dillon } 938f708f4d1SMatthew Dillon mtx_unlock(&Giant); 93991f37dcbSRobert Watson return (error); 94091f37dcbSRobert Watson } 941