174822Srwatson/*- 2165890Srwatson * Copyright (c) 1999-2003 Robert N. M. Watson 374822Srwatson * All rights reserved. 474822Srwatson * 585845Srwatson * This software was developed by Robert Watson for the TrustedBSD Project. 685845Srwatson * 774822Srwatson * Redistribution and use in source and binary forms, with or without 874822Srwatson * modification, are permitted provided that the following conditions 974822Srwatson * are met: 1074822Srwatson * 1. Redistributions of source code must retain the above copyright 1174822Srwatson * notice, this list of conditions and the following disclaimer. 1274822Srwatson * 2. Redistributions in binary form must reproduce the above copyright 1374822Srwatson * notice, this list of conditions and the following disclaimer in the 1474822Srwatson * documentation and/or other materials provided with the distribution. 1574822Srwatson * 1674822Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1774822Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1874822Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1974822Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2074822Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2174822Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2274822Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2374822Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2474822Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2574822Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2674822Srwatson * SUCH DAMAGE. 2774822Srwatson */ 28116192Sobrien 2974822Srwatson/* 3074822Srwatson * Support for POSIX.1e access control lists: UFS-specific support functions. 3174822Srwatson */ 3274822Srwatson 33116192Sobrien#include <sys/cdefs.h> 34116192Sobrien__FBSDID("$FreeBSD: releng/10.3/sys/ufs/ufs/ufs_acl.c 241011 2012-09-27 23:30:49Z mdf $"); 35116192Sobrien 3674822Srwatson#include "opt_ufs.h" 3774822Srwatson#include "opt_quota.h" 3874822Srwatson 3974822Srwatson#include <sys/param.h> 4074822Srwatson#include <sys/systm.h> 4174822Srwatson#include <sys/stat.h> 4274822Srwatson#include <sys/mount.h> 4374822Srwatson#include <sys/vnode.h> 4474822Srwatson#include <sys/types.h> 4574822Srwatson#include <sys/acl.h> 4674822Srwatson#include <sys/event.h> 4774822Srwatson#include <sys/extattr.h> 4874822Srwatson 4974822Srwatson#include <ufs/ufs/quota.h> 5074822Srwatson#include <ufs/ufs/inode.h> 5174822Srwatson#include <ufs/ufs/acl.h> 5274822Srwatson#include <ufs/ufs/extattr.h> 5374822Srwatson#include <ufs/ufs/dir.h> 5474822Srwatson#include <ufs/ufs/ufsmount.h> 5574822Srwatson#include <ufs/ufs/ufs_extern.h> 56184629Strasz#include <ufs/ffs/fs.h> 5774822Srwatson 5874822Srwatson#ifdef UFS_ACL 5974822Srwatson 60218485SnetchildFEATURE(ufs_acl, "ACL support for UFS"); 61218485Snetchild 6274822Srwatson/* 6374822Srwatson * Synchronize an ACL and an inode by copying over appropriate inode fields 6474822Srwatson * to the passed ACL. Assumes an ACL that would satisfy acl_posix1e_check(), 6574822Srwatson * and may panic if not. 6674822Srwatson */ 6774822Srwatsonvoid 6874822Srwatsonufs_sync_acl_from_inode(struct inode *ip, struct acl *acl) 6974822Srwatson{ 7074822Srwatson struct acl_entry *acl_mask, *acl_group_obj; 7174822Srwatson int i; 7274822Srwatson 7374822Srwatson /* 7474822Srwatson * Update ACL_USER_OBJ, ACL_OTHER, but simply identify ACL_MASK 7574822Srwatson * and ACL_GROUP_OBJ for use after we know whether ACL_MASK is 7674822Srwatson * present. 7774822Srwatson */ 7874822Srwatson acl_mask = NULL; 7974822Srwatson acl_group_obj = NULL; 8074822Srwatson for (i = 0; i < acl->acl_cnt; i++) { 8174822Srwatson switch (acl->acl_entry[i].ae_tag) { 8274822Srwatson case ACL_USER_OBJ: 8374822Srwatson acl->acl_entry[i].ae_perm = acl_posix1e_mode_to_perm( 8474822Srwatson ACL_USER_OBJ, ip->i_mode); 8575571Srwatson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; 8674822Srwatson break; 8774822Srwatson 8874822Srwatson case ACL_GROUP_OBJ: 8974822Srwatson acl_group_obj = &acl->acl_entry[i]; 9075571Srwatson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; 9174822Srwatson break; 9274822Srwatson 9374822Srwatson case ACL_OTHER: 9474822Srwatson acl->acl_entry[i].ae_perm = acl_posix1e_mode_to_perm( 9574822Srwatson ACL_OTHER, ip->i_mode); 9675571Srwatson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; 9774822Srwatson break; 9874822Srwatson 9974822Srwatson case ACL_MASK: 10074822Srwatson acl_mask = &acl->acl_entry[i]; 10175571Srwatson acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; 10274822Srwatson break; 10374822Srwatson 10474822Srwatson case ACL_USER: 10574822Srwatson case ACL_GROUP: 10674822Srwatson break; 10774822Srwatson 10874822Srwatson default: 10974822Srwatson panic("ufs_sync_acl_from_inode(): bad ae_tag"); 11074822Srwatson } 11174822Srwatson } 11274822Srwatson 11374822Srwatson if (acl_group_obj == NULL) 11474822Srwatson panic("ufs_sync_acl_from_inode(): no ACL_GROUP_OBJ"); 11574822Srwatson 11674822Srwatson if (acl_mask == NULL) { 11774822Srwatson /* 11874822Srwatson * There is no ACL_MASK, so update ACL_GROUP_OBJ. 11974822Srwatson */ 12074822Srwatson acl_group_obj->ae_perm = acl_posix1e_mode_to_perm( 12174822Srwatson ACL_GROUP_OBJ, ip->i_mode); 12274822Srwatson } else { 12374822Srwatson /* 12474822Srwatson * Update the ACL_MASK entry instead of ACL_GROUP_OBJ. 12574822Srwatson */ 12674822Srwatson acl_mask->ae_perm = acl_posix1e_mode_to_perm(ACL_GROUP_OBJ, 12774822Srwatson ip->i_mode); 12874822Srwatson } 12974822Srwatson} 13074822Srwatson 13174822Srwatson/* 132118411Srwatson * Calculate what the inode mode should look like based on an authoritative 133118411Srwatson * ACL for the inode. Replace only the fields in the inode that the ACL 134118411Srwatson * can represent. 13574822Srwatson */ 13674822Srwatsonvoid 137118411Srwatsonufs_sync_inode_from_acl(struct acl *acl, struct inode *ip) 13874822Srwatson{ 13974822Srwatson 140118411Srwatson ip->i_mode &= ACL_PRESERVE_MASK; 141118411Srwatson ip->i_mode |= acl_posix1e_acl_to_mode(acl); 142132775Skan DIP_SET(ip, i_mode, ip->i_mode); 14374822Srwatson} 14474822Srwatson 14574822Srwatson/* 146200796Strasz * Retrieve NFSv4 ACL, skipping access checks. Must be used in UFS code 147200796Strasz * instead of VOP_GETACL() when we don't want to be restricted by the user 148200796Strasz * not having ACL_READ_ACL permission, e.g. when calculating inherited ACL 149200796Strasz * or in ufs_vnops.c:ufs_accessx(). 150200796Strasz */ 151200796Straszint 152200796Straszufs_getacl_nfs4_internal(struct vnode *vp, struct acl *aclp, struct thread *td) 153200796Strasz{ 154200796Strasz int error, len; 155200796Strasz struct inode *ip = VTOI(vp); 156200796Strasz 157200796Strasz len = sizeof(*aclp); 158200796Strasz bzero(aclp, len); 159200796Strasz 160200796Strasz error = vn_extattr_get(vp, IO_NODELOCKED, 161200796Strasz NFS4_ACL_EXTATTR_NAMESPACE, NFS4_ACL_EXTATTR_NAME, 162200796Strasz &len, (char *) aclp, td); 163200796Strasz aclp->acl_maxcnt = ACL_MAX_ENTRIES; 164200796Strasz if (error == ENOATTR) { 165200796Strasz /* 166200796Strasz * Legitimately no ACL set on object, purely 167200796Strasz * emulate it through the inode. 168200796Strasz */ 169200796Strasz acl_nfs4_sync_acl_from_mode(aclp, ip->i_mode, ip->i_uid); 170200796Strasz 171200796Strasz return (0); 172200796Strasz } 173200796Strasz 174200796Strasz if (error) 175200796Strasz return (error); 176200796Strasz 177200796Strasz if (len != sizeof(*aclp)) { 178200796Strasz /* 179200796Strasz * A short (or long) read, meaning that for 180200796Strasz * some reason the ACL is corrupted. Return 181200796Strasz * EPERM since the object DAC protections 182200796Strasz * are unsafe. 183200796Strasz */ 184200796Strasz printf("ufs_getacl_nfs4(): Loaded invalid ACL (" 185241011Smdf "%d bytes), inumber %ju on %s\n", len, 186241011Smdf (uintmax_t)ip->i_number, ip->i_fs->fs_fsmnt); 187200796Strasz 188200796Strasz return (EPERM); 189200796Strasz } 190200796Strasz 191200796Strasz error = acl_nfs4_check(aclp, vp->v_type == VDIR); 192200796Strasz if (error) { 193200796Strasz printf("ufs_getacl_nfs4(): Loaded invalid ACL " 194241011Smdf "(failed acl_nfs4_check), inumber %ju on %s\n", 195241011Smdf (uintmax_t)ip->i_number, ip->i_fs->fs_fsmnt); 196200796Strasz 197200796Strasz return (EPERM); 198200796Strasz } 199200796Strasz 200200796Strasz return (0); 201200796Strasz} 202200796Strasz 203200796Straszstatic int 204200796Straszufs_getacl_nfs4(struct vop_getacl_args *ap) 205200796Strasz{ 206200796Strasz int error; 207200796Strasz 208200796Strasz if ((ap->a_vp->v_mount->mnt_flag & MNT_NFS4ACLS) == 0) 209200796Strasz return (EINVAL); 210200796Strasz 211200796Strasz error = VOP_ACCESSX(ap->a_vp, VREAD_ACL, ap->a_td->td_ucred, ap->a_td); 212200796Strasz if (error) 213200796Strasz return (error); 214200796Strasz 215200796Strasz error = ufs_getacl_nfs4_internal(ap->a_vp, ap->a_aclp, ap->a_td); 216200796Strasz 217200796Strasz return (error); 218200796Strasz} 219200796Strasz 220200796Strasz/* 221192586Strasz * Read POSIX.1e ACL from an EA. Return error if its not found 222192586Strasz * or if any other error has occured. 223192586Strasz */ 224192586Straszstatic int 225192586Straszufs_get_oldacl(acl_type_t type, struct oldacl *old, struct vnode *vp, 226192586Strasz struct thread *td) 227192586Strasz{ 228192586Strasz int error, len; 229192586Strasz struct inode *ip = VTOI(vp); 230192586Strasz 231192586Strasz len = sizeof(*old); 232192586Strasz 233192586Strasz switch (type) { 234192586Strasz case ACL_TYPE_ACCESS: 235192586Strasz error = vn_extattr_get(vp, IO_NODELOCKED, 236192586Strasz POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE, 237192586Strasz POSIX1E_ACL_ACCESS_EXTATTR_NAME, &len, (char *) old, 238192586Strasz td); 239192586Strasz break; 240192586Strasz case ACL_TYPE_DEFAULT: 241192586Strasz if (vp->v_type != VDIR) 242192586Strasz return (EINVAL); 243192586Strasz error = vn_extattr_get(vp, IO_NODELOCKED, 244192586Strasz POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE, 245192586Strasz POSIX1E_ACL_DEFAULT_EXTATTR_NAME, &len, (char *) old, 246192586Strasz td); 247192586Strasz break; 248192586Strasz default: 249192586Strasz return (EINVAL); 250192586Strasz } 251192586Strasz 252192586Strasz if (error != 0) 253192586Strasz return (error); 254192586Strasz 255192586Strasz if (len != sizeof(*old)) { 256192586Strasz /* 257192586Strasz * A short (or long) read, meaning that for some reason 258192586Strasz * the ACL is corrupted. Return EPERM since the object 259192586Strasz * DAC protections are unsafe. 260192586Strasz */ 261192586Strasz printf("ufs_get_oldacl(): Loaded invalid ACL " 262241011Smdf "(len = %d), inumber %ju on %s\n", len, 263241011Smdf (uintmax_t)ip->i_number, ip->i_fs->fs_fsmnt); 264192586Strasz return (EPERM); 265192586Strasz } 266192586Strasz 267192586Strasz return (0); 268192586Strasz} 269192586Strasz 270192586Strasz/* 27174822Srwatson * Retrieve the ACL on a file. 27274822Srwatson * 27374822Srwatson * As part of the ACL is stored in the inode, and the rest in an EA, 27474822Srwatson * assemble both into a final ACL product. Right now this is not done 27574822Srwatson * very efficiently. 27674822Srwatson */ 277192586Straszstatic int 278192586Straszufs_getacl_posix1e(struct vop_getacl_args *ap) 27974822Srwatson{ 28074822Srwatson struct inode *ip = VTOI(ap->a_vp); 281192586Strasz int error; 282192586Strasz struct oldacl *old; 28374822Srwatson 284105179Srwatson /* 285105179Srwatson * XXX: If ufs_getacl() should work on file systems not supporting 286105179Srwatson * ACLs, remove this check. 287105179Srwatson */ 288105179Srwatson if ((ap->a_vp->v_mount->mnt_flag & MNT_ACLS) == 0) 289200796Strasz return (EINVAL); 29074822Srwatson 291192586Strasz old = malloc(sizeof(*old), M_ACL, M_WAITOK | M_ZERO); 292192586Strasz 29374822Srwatson /* 294192586Strasz * Attempt to retrieve the ACL from the extended attributes. 29574822Srwatson */ 296192586Strasz error = ufs_get_oldacl(ap->a_type, old, ap->a_vp, ap->a_td); 297192586Strasz switch (error) { 298192586Strasz /* 299192586Strasz * XXX: If ufs_getacl() should work on filesystems 300192586Strasz * without the EA configured, add case EOPNOTSUPP here. 301192586Strasz */ 302192586Strasz case ENOATTR: 303192586Strasz switch (ap->a_type) { 304192586Strasz case ACL_TYPE_ACCESS: 30574822Srwatson /* 30674822Srwatson * Legitimately no ACL set on object, purely 30774822Srwatson * emulate it through the inode. These fields will 30874822Srwatson * be updated when the ACL is synchronized with 30974822Srwatson * the inode later. 31074822Srwatson */ 311192586Strasz old->acl_cnt = 3; 312192586Strasz old->acl_entry[0].ae_tag = ACL_USER_OBJ; 313192586Strasz old->acl_entry[0].ae_id = ACL_UNDEFINED_ID; 314192586Strasz old->acl_entry[0].ae_perm = ACL_PERM_NONE; 315192586Strasz old->acl_entry[1].ae_tag = ACL_GROUP_OBJ; 316192586Strasz old->acl_entry[1].ae_id = ACL_UNDEFINED_ID; 317192586Strasz old->acl_entry[1].ae_perm = ACL_PERM_NONE; 318192586Strasz old->acl_entry[2].ae_tag = ACL_OTHER; 319192586Strasz old->acl_entry[2].ae_id = ACL_UNDEFINED_ID; 320192586Strasz old->acl_entry[2].ae_perm = ACL_PERM_NONE; 32174822Srwatson break; 32274822Srwatson 323192586Strasz case ACL_TYPE_DEFAULT: 324192586Strasz /* 325192586Strasz * Unlike ACL_TYPE_ACCESS, there is no relationship 326192586Strasz * between the inode contents and the ACL, and it is 327192586Strasz * therefore possible for the request for the ACL 328192586Strasz * to fail since the ACL is undefined. In this 329192586Strasz * situation, return success and an empty ACL, 330192586Strasz * as required by POSIX.1e. 331192586Strasz */ 332192586Strasz old->acl_cnt = 0; 33374822Srwatson break; 33474822Srwatson } 335192586Strasz /* FALLTHROUGH */ 336192586Strasz case 0: 337192586Strasz error = acl_copy_oldacl_into_acl(old, ap->a_aclp); 338192586Strasz if (error != 0) 33974822Srwatson break; 34074822Srwatson 341192586Strasz if (ap->a_type == ACL_TYPE_ACCESS) 342192586Strasz ufs_sync_acl_from_inode(ip, ap->a_aclp); 343192586Strasz default: 34474822Srwatson break; 34574822Srwatson } 34674822Srwatson 347192586Strasz free(old, M_ACL); 34874822Srwatson return (error); 34974822Srwatson} 35074822Srwatson 351192586Straszint 352192586Straszufs_getacl(ap) 353192586Strasz struct vop_getacl_args /* { 354192586Strasz struct vnode *vp; 355192586Strasz acl_type_t type; 356192586Strasz struct acl *aclp; 357192586Strasz struct ucred *cred; 358192586Strasz struct thread *td; 359192586Strasz } */ *ap; 360192586Strasz{ 361192586Strasz 362200796Strasz if ((ap->a_vp->v_mount->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) == 0) 363200796Strasz return (EOPNOTSUPP); 364200796Strasz 365200796Strasz if (ap->a_type == ACL_TYPE_NFS4) 366200796Strasz return (ufs_getacl_nfs4(ap)); 367200796Strasz 368192586Strasz return (ufs_getacl_posix1e(ap)); 369192586Strasz} 370192586Strasz 37174822Srwatson/* 372200796Strasz * Set NFSv4 ACL without doing any access checking. This is required 373200796Strasz * e.g. by the UFS code that implements ACL inheritance, or from 374200796Strasz * ufs_vnops.c:ufs_chmod(), as some of the checks have to be skipped 375200796Strasz * in that case, and others are redundant. 376200796Strasz */ 377200796Straszint 378200796Straszufs_setacl_nfs4_internal(struct vnode *vp, struct acl *aclp, struct thread *td) 379200796Strasz{ 380200796Strasz int error; 381200796Strasz mode_t mode; 382200796Strasz struct inode *ip = VTOI(vp); 383200796Strasz 384200796Strasz KASSERT(acl_nfs4_check(aclp, vp->v_type == VDIR) == 0, 385200796Strasz ("invalid ACL passed to ufs_setacl_nfs4_internal")); 386200796Strasz 387200796Strasz if (acl_nfs4_is_trivial(aclp, ip->i_uid)) { 388200796Strasz error = vn_extattr_rm(vp, IO_NODELOCKED, 389200796Strasz NFS4_ACL_EXTATTR_NAMESPACE, NFS4_ACL_EXTATTR_NAME, td); 390200796Strasz 391200796Strasz /* 392200796Strasz * An attempt to remove ACL from a file that didn't have 393200796Strasz * any extended entries is not an error. 394200796Strasz */ 395200796Strasz if (error == ENOATTR) 396200796Strasz error = 0; 397200796Strasz 398200796Strasz } else { 399200796Strasz error = vn_extattr_set(vp, IO_NODELOCKED, 400200796Strasz NFS4_ACL_EXTATTR_NAMESPACE, NFS4_ACL_EXTATTR_NAME, 401200796Strasz sizeof(*aclp), (char *) aclp, td); 402200796Strasz } 403200796Strasz 404200796Strasz /* 405200796Strasz * Map lack of attribute definition in UFS_EXTATTR into lack of 406200796Strasz * support for ACLs on the filesystem. 407200796Strasz */ 408200796Strasz if (error == ENOATTR) 409200796Strasz return (EOPNOTSUPP); 410200796Strasz 411200796Strasz if (error) 412200796Strasz return (error); 413200796Strasz 414200796Strasz mode = ip->i_mode; 415200796Strasz 416200796Strasz acl_nfs4_sync_mode_from_acl(&mode, aclp); 417200796Strasz 418200796Strasz ip->i_mode &= ACL_PRESERVE_MASK; 419200796Strasz ip->i_mode |= mode; 420200796Strasz DIP_SET(ip, i_mode, ip->i_mode); 421200796Strasz ip->i_flag |= IN_CHANGE; 422200796Strasz 423200796Strasz VN_KNOTE_UNLOCKED(vp, NOTE_ATTRIB); 424200796Strasz 425231122Skib error = UFS_UPDATE(vp, 0); 426231122Skib return (error); 427200796Strasz} 428200796Strasz 429200796Straszstatic int 430200796Straszufs_setacl_nfs4(struct vop_setacl_args *ap) 431200796Strasz{ 432200796Strasz int error; 433200796Strasz struct inode *ip = VTOI(ap->a_vp); 434200796Strasz 435200796Strasz if ((ap->a_vp->v_mount->mnt_flag & MNT_NFS4ACLS) == 0) 436200796Strasz return (EINVAL); 437200796Strasz 438200796Strasz if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY) 439200796Strasz return (EROFS); 440200796Strasz 441200796Strasz if (ap->a_aclp == NULL) 442200796Strasz return (EINVAL); 443200796Strasz 444200796Strasz error = VOP_ACLCHECK(ap->a_vp, ap->a_type, ap->a_aclp, ap->a_cred, 445200796Strasz ap->a_td); 446200796Strasz if (error) 447200796Strasz return (error); 448200796Strasz 449200796Strasz /* 450200796Strasz * Authorize the ACL operation. 451200796Strasz */ 452200796Strasz if (ip->i_flags & (IMMUTABLE | APPEND)) 453200796Strasz return (EPERM); 454200796Strasz 455200796Strasz /* 456200796Strasz * Must hold VWRITE_ACL or have appropriate privilege. 457200796Strasz */ 458200796Strasz if ((error = VOP_ACCESSX(ap->a_vp, VWRITE_ACL, ap->a_cred, ap->a_td))) 459200796Strasz return (error); 460200796Strasz 461200796Strasz /* 462200796Strasz * With NFSv4 ACLs, chmod(2) may need to add additional entries. 463200796Strasz * Make sure it has enough room for that - splitting every entry 464200796Strasz * into two and appending "canonical six" entries at the end. 465200796Strasz */ 466200796Strasz if (ap->a_aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) 467200796Strasz return (ENOSPC); 468200796Strasz 469200796Strasz error = ufs_setacl_nfs4_internal(ap->a_vp, ap->a_aclp, ap->a_td); 470200796Strasz 471202971Strasz return (error); 472200796Strasz} 473200796Strasz 474200796Strasz/* 47574822Srwatson * Set the ACL on a file. 47674822Srwatson * 47774822Srwatson * As part of the ACL is stored in the inode, and the rest in an EA, 47874822Srwatson * this is necessarily non-atomic, and has complex authorization. 47974822Srwatson * As ufs_setacl() includes elements of ufs_chown() and ufs_chmod(), 48074822Srwatson * a fair number of different access checks may be required to go ahead 48174822Srwatson * with the operation at all. 48274822Srwatson */ 483192586Straszstatic int 484192586Straszufs_setacl_posix1e(struct vop_setacl_args *ap) 48574822Srwatson{ 48674822Srwatson struct inode *ip = VTOI(ap->a_vp); 48775571Srwatson int error; 488192586Strasz struct oldacl *old; 48974822Srwatson 490105179Srwatson if ((ap->a_vp->v_mount->mnt_flag & MNT_ACLS) == 0) 491200796Strasz return (EINVAL); 492105179Srwatson 49374822Srwatson /* 49474822Srwatson * If this is a set operation rather than a delete operation, 49574822Srwatson * invoke VOP_ACLCHECK() on the passed ACL to determine if it is 49674822Srwatson * valid for the target. This will include a check on ap->a_type. 49774822Srwatson */ 49874822Srwatson if (ap->a_aclp != NULL) { 49974822Srwatson /* 50074822Srwatson * Set operation. 50174822Srwatson */ 50274822Srwatson error = VOP_ACLCHECK(ap->a_vp, ap->a_type, ap->a_aclp, 50383366Sjulian ap->a_cred, ap->a_td); 50474822Srwatson if (error != 0) 50574822Srwatson return (error); 50674822Srwatson } else { 50774822Srwatson /* 50874822Srwatson * Delete operation. 50974822Srwatson * POSIX.1e allows only deletion of the default ACL on a 51074822Srwatson * directory (ACL_TYPE_DEFAULT). 51174822Srwatson */ 51274822Srwatson if (ap->a_type != ACL_TYPE_DEFAULT) 51374822Srwatson return (EINVAL); 51474822Srwatson if (ap->a_vp->v_type != VDIR) 51574822Srwatson return (ENOTDIR); 51674822Srwatson } 51774822Srwatson 51874822Srwatson if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY) 51974822Srwatson return (EROFS); 52074822Srwatson 52174822Srwatson /* 52274822Srwatson * Authorize the ACL operation. 52374822Srwatson */ 52474822Srwatson if (ip->i_flags & (IMMUTABLE | APPEND)) 52574822Srwatson return (EPERM); 52674822Srwatson 52774822Srwatson /* 52874822Srwatson * Must hold VADMIN (be file owner) or have appropriate privilege. 52974822Srwatson */ 53083366Sjulian if ((error = VOP_ACCESS(ap->a_vp, VADMIN, ap->a_cred, ap->a_td))) 53174822Srwatson return (error); 53274822Srwatson 53374822Srwatson switch(ap->a_type) { 53474822Srwatson case ACL_TYPE_ACCESS: 535192586Strasz old = malloc(sizeof(*old), M_ACL, M_WAITOK | M_ZERO); 536192586Strasz error = acl_copy_acl_into_oldacl(ap->a_aclp, old); 537192586Strasz if (error == 0) { 538192586Strasz error = vn_extattr_set(ap->a_vp, IO_NODELOCKED, 539192586Strasz POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE, 540192586Strasz POSIX1E_ACL_ACCESS_EXTATTR_NAME, sizeof(*old), 541192586Strasz (char *) old, ap->a_td); 542192586Strasz } 543192586Strasz free(old, M_ACL); 54474822Srwatson break; 54574822Srwatson 54674822Srwatson case ACL_TYPE_DEFAULT: 54774822Srwatson if (ap->a_aclp == NULL) { 54874822Srwatson error = vn_extattr_rm(ap->a_vp, IO_NODELOCKED, 54974822Srwatson POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE, 55083366Sjulian POSIX1E_ACL_DEFAULT_EXTATTR_NAME, ap->a_td); 55174822Srwatson /* 55274822Srwatson * Attempting to delete a non-present default ACL 55374822Srwatson * will return success for portability purposes. 55474822Srwatson * (TRIX) 55585581Srwatson * 55685581Srwatson * XXX: Note that since we can't distinguish 55785581Srwatson * "that EA is not supported" from "that EA is not 55885581Srwatson * defined", the success case here overlaps the 55991814Sgreen * the ENOATTR->EOPNOTSUPP case below. 56074822Srwatson */ 56191814Sgreen if (error == ENOATTR) 56274822Srwatson error = 0; 563192586Strasz } else { 564192586Strasz old = malloc(sizeof(*old), M_ACL, M_WAITOK | M_ZERO); 565192586Strasz error = acl_copy_acl_into_oldacl(ap->a_aclp, old); 566192586Strasz if (error == 0) { 567192586Strasz error = vn_extattr_set(ap->a_vp, IO_NODELOCKED, 568192586Strasz POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE, 569192586Strasz POSIX1E_ACL_DEFAULT_EXTATTR_NAME, 570192586Strasz sizeof(*old), (char *) old, ap->a_td); 571192586Strasz } 572192586Strasz free(old, M_ACL); 573192586Strasz } 57474822Srwatson break; 57574822Srwatson 57674822Srwatson default: 57774822Srwatson error = EINVAL; 57874822Srwatson } 57974822Srwatson /* 58074822Srwatson * Map lack of attribute definition in UFS_EXTATTR into lack of 58196755Strhodes * support for ACLs on the filesystem. 58274822Srwatson */ 58391814Sgreen if (error == ENOATTR) 58474822Srwatson return (EOPNOTSUPP); 58574822Srwatson if (error != 0) 58674822Srwatson return (error); 58774822Srwatson 58874822Srwatson if (ap->a_type == ACL_TYPE_ACCESS) { 58974822Srwatson /* 59074822Srwatson * Now that the EA is successfully updated, update the 59174822Srwatson * inode and mark it as changed. 59274822Srwatson */ 593118411Srwatson ufs_sync_inode_from_acl(ap->a_aclp, ip); 59474822Srwatson ip->i_flag |= IN_CHANGE; 595231122Skib error = UFS_UPDATE(ap->a_vp, 0); 59674822Srwatson } 59774822Srwatson 598133741Sjmg VN_KNOTE_UNLOCKED(ap->a_vp, NOTE_ATTRIB); 599231122Skib return (error); 60074822Srwatson} 60174822Srwatson 60274822Srwatsonint 603192586Straszufs_setacl(ap) 604192586Strasz struct vop_setacl_args /* { 60574822Srwatson struct vnode *vp; 60674822Srwatson acl_type_t type; 60774822Srwatson struct acl *aclp; 60874822Srwatson struct ucred *cred; 60983366Sjulian struct thread *td; 61074822Srwatson } */ *ap; 61174822Srwatson{ 612200796Strasz if ((ap->a_vp->v_mount->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) == 0) 613200796Strasz return (EOPNOTSUPP); 61474822Srwatson 615200796Strasz if (ap->a_type == ACL_TYPE_NFS4) 616200796Strasz return (ufs_setacl_nfs4(ap)); 617200796Strasz 618192586Strasz return (ufs_setacl_posix1e(ap)); 619192586Strasz} 620192586Strasz 621192586Straszstatic int 622200796Straszufs_aclcheck_nfs4(struct vop_aclcheck_args *ap) 623200796Strasz{ 624200796Strasz int is_directory = 0; 625200796Strasz 626200796Strasz if ((ap->a_vp->v_mount->mnt_flag & MNT_NFS4ACLS) == 0) 627200796Strasz return (EINVAL); 628200796Strasz 629200796Strasz /* 630200796Strasz * With NFSv4 ACLs, chmod(2) may need to add additional entries. 631200796Strasz * Make sure it has enough room for that - splitting every entry 632200796Strasz * into two and appending "canonical six" entries at the end. 633200796Strasz */ 634200796Strasz if (ap->a_aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) 635200796Strasz return (ENOSPC); 636200796Strasz 637200796Strasz if (ap->a_vp->v_type == VDIR) 638200796Strasz is_directory = 1; 639200796Strasz 640200796Strasz return (acl_nfs4_check(ap->a_aclp, is_directory)); 641200796Strasz} 642200796Strasz 643200796Straszstatic int 644192586Straszufs_aclcheck_posix1e(struct vop_aclcheck_args *ap) 645192586Strasz{ 646192586Strasz 647105179Srwatson if ((ap->a_vp->v_mount->mnt_flag & MNT_ACLS) == 0) 648200796Strasz return (EINVAL); 649105179Srwatson 65074822Srwatson /* 65174822Srwatson * Verify we understand this type of ACL, and that it applies 65274822Srwatson * to this kind of object. 65374822Srwatson * Rely on the acl_posix1e_check() routine to verify the contents. 65474822Srwatson */ 65574822Srwatson switch(ap->a_type) { 65674822Srwatson case ACL_TYPE_ACCESS: 65774822Srwatson break; 65874822Srwatson 65974822Srwatson case ACL_TYPE_DEFAULT: 66074822Srwatson if (ap->a_vp->v_type != VDIR) 66174822Srwatson return (EINVAL); 66274822Srwatson break; 66374822Srwatson 66474822Srwatson default: 66574822Srwatson return (EINVAL); 66674822Srwatson } 667192586Strasz 668192586Strasz if (ap->a_aclp->acl_cnt > OLDACL_MAX_ENTRIES) 669192586Strasz return (EINVAL); 670192586Strasz 67174822Srwatson return (acl_posix1e_check(ap->a_aclp)); 67274822Srwatson} 67374822Srwatson 674192586Strasz/* 675192586Strasz * Check the validity of an ACL for a file. 676192586Strasz */ 677192586Straszint 678192586Straszufs_aclcheck(ap) 679192586Strasz struct vop_aclcheck_args /* { 680192586Strasz struct vnode *vp; 681192586Strasz acl_type_t type; 682192586Strasz struct acl *aclp; 683192586Strasz struct ucred *cred; 684192586Strasz struct thread *td; 685192586Strasz } */ *ap; 686192586Strasz{ 687192586Strasz 688200796Strasz if ((ap->a_vp->v_mount->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) == 0) 689200796Strasz return (EOPNOTSUPP); 690200796Strasz 691200796Strasz if (ap->a_type == ACL_TYPE_NFS4) 692200796Strasz return (ufs_aclcheck_nfs4(ap)); 693200796Strasz 694192586Strasz return (ufs_aclcheck_posix1e(ap)); 695192586Strasz} 696192586Strasz 69774822Srwatson#endif /* !UFS_ACL */ 698