4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
24 * Extended attributes (xattr) on Solaris are implemented as files
25 * which exist in a hidden xattr directory. These extended attributes
26 * can be accessed using the attropen() system call which opens
27 * the extended attribute. It can then be manipulated just like
28 * a standard file descriptor. This has a couple advantages such
29 * as practically no size limit on the file, and the extended
30 * attributes permissions may differ from those of the parent file.
31 * This interface is really quite clever, but it's also completely
32 * different than what is supported on Linux. It also comes with a
33 * steep performance penalty when accessing small xattrs because they
34 * are not stored with the parent file.
36 * Under Linux extended attributes are manipulated by the system
37 * calls getxattr(2), setxattr(2), and listxattr(2). They consider
38 * extended attributes to be name/value pairs where the name is a
39 * NULL terminated string. The name must also include one of the
40 * following namespace prefixes:
42 * user - No restrictions and is available to user applications.
43 * trusted - Restricted to kernel and root (CAP_SYS_ADMIN) use.
44 * system - Used for access control lists (system.nfs4_acl, etc).
45 * security - Used by SELinux to store a files security context.
47 * The value under Linux to limited to 65536 bytes of binary data.
48 * In practice, individual xattrs tend to be much smaller than this
49 * and are typically less than 100 bytes. A good example of this
50 * are the security.selinux xattrs which are less than 100 bytes and
51 * exist for every file when xattr labeling is enabled.
53 * The Linux xattr implemenation has been written to take advantage of
54 * this typical usage. When the dataset property 'xattr=sa' is set,
55 * then xattrs will be preferentially stored as System Attributes (SA).
56 * This allows tiny xattrs (~100 bytes) to be stored with the dnode and
57 * up to 64k of xattrs to be stored in the spill block. If additional
58 * xattr space is required, which is unlikely under Linux, they will
59 * be stored using the traditional directory approach.
61 * This optimization results in roughly a 3x performance improvement
62 * when accessing xattrs because it avoids the need to perform a seek
63 * for every xattr value. When multiple xattrs are stored per-file
64 * the performance improvements are even greater because all of the
65 * xattrs stored in the spill block will be cached.
67 * However, by default SA based xattrs are disabled in the Linux port
68 * to maximize compatibility with other implementations. If you do
69 * enable SA based xattrs then they will not be visible on platforms
70 * which do not support this feature.
72 * NOTE: One additional consequence of the xattr directory implementation
73 * is that when an extended attribute is manipulated an inode is created.
74 * This inode will exist in the Linux inode cache but there will be no
75 * associated entry in the dentry cache which references it. This is
76 * safe but it may result in some confusion. Enabling SA based xattrs
77 * largely avoids the issue except in the overflow case.
80 #include <sys/zfs_vfsops.h>
81 #include <sys/zfs_vnops.h>
82 #include <sys/zfs_znode.h>
87 typedef struct xattr_filldir {
95 zpl_xattr_filldir(xattr_filldir_t *xf, const char *name, int name_len)
97 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
98 if (!(ITOZSB(xf->inode)->z_flags & ZSB_XATTR))
101 if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
102 if (!capable(CAP_SYS_ADMIN))
105 /* When xf->buf is NULL only calculate the required size. */
107 if (xf->offset + name_len + 1 > xf->size)
110 memcpy(xf->buf + xf->offset, name, name_len);
111 xf->buf[xf->offset + name_len] = '\0';
114 xf->offset += (name_len + 1);
120 * Read as many directory entry names as will fit in to the provided buffer,
121 * or when no buffer is provided calculate the required buffer size.
124 zpl_xattr_readdir(struct inode *dxip, xattr_filldir_t *xf)
130 zap_cursor_init(&zc, ITOZSB(dxip)->z_os, ITOZ(dxip)->z_id);
132 while ((error = -zap_cursor_retrieve(&zc, &zap)) == 0) {
134 if (zap.za_integer_length != 8 || zap.za_num_integers != 1) {
139 error = zpl_xattr_filldir(xf, zap.za_name, strlen(zap.za_name));
143 zap_cursor_advance(&zc);
146 zap_cursor_fini(&zc);
148 if (error == -ENOENT)
155 zpl_xattr_list_dir(xattr_filldir_t *xf, cred_t *cr)
157 struct inode *ip = xf->inode;
158 struct inode *dxip = NULL;
161 /* Lookup the xattr directory */
162 error = -zfs_lookup(ip, NULL, &dxip, LOOKUP_XATTR, cr, NULL, NULL);
164 if (error == -ENOENT)
170 error = zpl_xattr_readdir(dxip, xf);
177 zpl_xattr_list_sa(xattr_filldir_t *xf)
179 znode_t *zp = ITOZ(xf->inode);
180 nvpair_t *nvp = NULL;
183 mutex_enter(&zp->z_lock);
184 if (zp->z_xattr_cached == NULL)
185 error = -zfs_sa_get_xattr(zp);
186 mutex_exit(&zp->z_lock);
191 ASSERT(zp->z_xattr_cached);
193 while ((nvp = nvlist_next_nvpair(zp->z_xattr_cached, nvp)) != NULL) {
194 ASSERT3U(nvpair_type(nvp), ==, DATA_TYPE_BYTE_ARRAY);
196 error = zpl_xattr_filldir(xf, nvpair_name(nvp),
197 strlen(nvpair_name(nvp)));
206 zpl_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size)
208 znode_t *zp = ITOZ(dentry->d_inode);
209 zfs_sb_t *zsb = ZTOZSB(zp);
210 xattr_filldir_t xf = { buffer_size, 0, buffer, dentry->d_inode };
215 rw_enter(&zp->z_xattr_lock, RW_READER);
217 if (zsb->z_use_sa && zp->z_is_sa) {
218 error = zpl_xattr_list_sa(&xf);
223 error = zpl_xattr_list_dir(&xf, cr);
230 rw_exit(&zp->z_xattr_lock);
237 zpl_xattr_get_dir(struct inode *ip, const char *name, void *value,
238 size_t size, cred_t *cr)
240 struct inode *dxip = NULL;
241 struct inode *xip = NULL;
244 /* Lookup the xattr directory */
245 error = -zfs_lookup(ip, NULL, &dxip, LOOKUP_XATTR, cr, NULL, NULL);
249 /* Lookup a specific xattr name in the directory */
250 error = -zfs_lookup(dxip, (char *)name, &xip, 0, cr, NULL, NULL);
255 error = i_size_read(xip);
259 if (size < i_size_read(xip)) {
264 error = zpl_read_common(xip, value, size, 0, UIO_SYSSPACE, 0, cr);
276 zpl_xattr_get_sa(struct inode *ip, const char *name, void *value, size_t size)
278 znode_t *zp = ITOZ(ip);
283 ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock));
285 mutex_enter(&zp->z_lock);
286 if (zp->z_xattr_cached == NULL)
287 error = -zfs_sa_get_xattr(zp);
288 mutex_exit(&zp->z_lock);
293 ASSERT(zp->z_xattr_cached);
294 error = -nvlist_lookup_byte_array(zp->z_xattr_cached, name,
295 &nv_value, &nv_size);
305 memcpy(value, nv_value, nv_size);
311 __zpl_xattr_get(struct inode *ip, const char *name, void *value, size_t size,
314 znode_t *zp = ITOZ(ip);
315 zfs_sb_t *zsb = ZTOZSB(zp);
318 ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock));
320 if (zsb->z_use_sa && zp->z_is_sa) {
321 error = zpl_xattr_get_sa(ip, name, value, size);
322 if (error != -ENOENT)
326 error = zpl_xattr_get_dir(ip, name, value, size, cr);
328 if (error == -ENOENT)
335 zpl_xattr_get(struct inode *ip, const char *name, void *value, size_t size)
337 znode_t *zp = ITOZ(ip);
342 rw_enter(&zp->z_xattr_lock, RW_READER);
343 error = __zpl_xattr_get(ip, name, value, size, cr);
344 rw_exit(&zp->z_xattr_lock);
351 zpl_xattr_set_dir(struct inode *ip, const char *name, const void *value,
352 size_t size, int flags, cred_t *cr)
354 struct inode *dxip = NULL;
355 struct inode *xip = NULL;
358 int lookup_flags, error;
359 const int xattr_mode = S_IFREG | 0644;
362 * Lookup the xattr directory. When we're adding an entry pass
363 * CREATE_XATTR_DIR to ensure the xattr directory is created.
364 * When removing an entry this flag is not passed to avoid
365 * unnecessarily creating a new xattr directory.
367 lookup_flags = LOOKUP_XATTR;
369 lookup_flags |= CREATE_XATTR_DIR;
371 error = -zfs_lookup(ip, NULL, &dxip, lookup_flags, cr, NULL, NULL);
375 /* Lookup a specific xattr name in the directory */
376 error = -zfs_lookup(dxip, (char *)name, &xip, 0, cr, NULL, NULL);
377 if (error && (error != -ENOENT))
382 /* Remove a specific name xattr when value is set to NULL. */
385 error = -zfs_remove(dxip, (char *)name, cr);
390 /* Lookup failed create a new xattr. */
392 vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
393 vap->va_mode = xattr_mode;
394 vap->va_mask = ATTR_MODE;
395 vap->va_uid = crgetfsuid(cr);
396 vap->va_gid = crgetfsgid(cr);
398 error = -zfs_create(dxip, (char *)name, vap, 0, 0644, &xip,
406 error = -zfs_freesp(ITOZ(xip), 0, 0, xattr_mode, TRUE);
410 wrote = zpl_write_common(xip, value, size, 0, UIO_SYSSPACE, 0, cr);
416 kmem_free(vap, sizeof(vattr_t));
424 if (error == -ENOENT)
427 ASSERT3S(error, <=, 0);
433 zpl_xattr_set_sa(struct inode *ip, const char *name, const void *value,
434 size_t size, int flags, cred_t *cr)
436 znode_t *zp = ITOZ(ip);
441 ASSERT(zp->z_xattr_cached);
442 nvl = zp->z_xattr_cached;
445 error = -nvlist_remove(nvl, name, DATA_TYPE_BYTE_ARRAY);
446 if (error == -ENOENT)
447 error = zpl_xattr_set_dir(ip, name, NULL, 0, flags, cr);
449 /* Do not allow SA xattrs in symlinks (issue #1648) */
450 if (S_ISLNK(ip->i_mode))
453 /* Limited to 32k to keep nvpair memory allocations small */
454 if (size > DXATTR_MAX_ENTRY_SIZE)
457 /* Prevent the DXATTR SA from consuming the entire SA region */
458 error = -nvlist_size(nvl, &sa_size, NV_ENCODE_XDR);
462 if (sa_size > DXATTR_MAX_SA_SIZE)
465 error = -nvlist_add_byte_array(nvl, name,
466 (uchar_t *)value, size);
471 /* Update the SA for additions, modifications, and removals. */
473 error = -zfs_sa_set_xattr(zp);
475 ASSERT3S(error, <=, 0);
481 zpl_xattr_set(struct inode *ip, const char *name, const void *value,
482 size_t size, int flags)
484 znode_t *zp = ITOZ(ip);
485 zfs_sb_t *zsb = ZTOZSB(zp);
490 rw_enter(&ITOZ(ip)->z_xattr_lock, RW_WRITER);
493 * Before setting the xattr check to see if it already exists.
494 * This is done to ensure the following optional flags are honored.
496 * XATTR_CREATE: fail if xattr already exists
497 * XATTR_REPLACE: fail if xattr does not exist
499 error = __zpl_xattr_get(ip, name, NULL, 0, cr);
501 if (error != -ENODATA)
504 if (flags & XATTR_REPLACE)
507 /* The xattr to be removed already doesn't exist */
513 if (flags & XATTR_CREATE)
517 /* Preferentially store the xattr as a SA for better performance */
518 if (zsb->z_use_sa && zsb->z_xattr_sa && zp->z_is_sa) {
519 error = zpl_xattr_set_sa(ip, name, value, size, flags, cr);
524 error = zpl_xattr_set_dir(ip, name, value, size, flags, cr);
526 rw_exit(&ITOZ(ip)->z_xattr_lock);
528 ASSERT3S(error, <=, 0);
534 __zpl_xattr_user_get(struct inode *ip, const char *name,
535 void *value, size_t size)
540 if (strcmp(name, "") == 0)
543 if (!(ITOZSB(ip)->z_flags & ZSB_XATTR))
546 xattr_name = kmem_asprintf("%s%s", XATTR_USER_PREFIX, name);
547 error = zpl_xattr_get(ip, xattr_name, value, size);
552 ZPL_XATTR_GET_WRAPPER(zpl_xattr_user_get);
555 __zpl_xattr_user_set(struct inode *ip, const char *name,
556 const void *value, size_t size, int flags)
561 if (strcmp(name, "") == 0)
564 if (!(ITOZSB(ip)->z_flags & ZSB_XATTR))
567 xattr_name = kmem_asprintf("%s%s", XATTR_USER_PREFIX, name);
568 error = zpl_xattr_set(ip, xattr_name, value, size, flags);
573 ZPL_XATTR_SET_WRAPPER(zpl_xattr_user_set);
575 xattr_handler_t zpl_xattr_user_handler = {
576 .prefix = XATTR_USER_PREFIX,
577 .get = zpl_xattr_user_get,
578 .set = zpl_xattr_user_set,
582 __zpl_xattr_trusted_get(struct inode *ip, const char *name,
583 void *value, size_t size)
588 if (!capable(CAP_SYS_ADMIN))
591 if (strcmp(name, "") == 0)
594 xattr_name = kmem_asprintf("%s%s", XATTR_TRUSTED_PREFIX, name);
595 error = zpl_xattr_get(ip, xattr_name, value, size);
600 ZPL_XATTR_GET_WRAPPER(zpl_xattr_trusted_get);
603 __zpl_xattr_trusted_set(struct inode *ip, const char *name,
604 const void *value, size_t size, int flags)
609 if (!capable(CAP_SYS_ADMIN))
612 if (strcmp(name, "") == 0)
615 xattr_name = kmem_asprintf("%s%s", XATTR_TRUSTED_PREFIX, name);
616 error = zpl_xattr_set(ip, xattr_name, value, size, flags);
621 ZPL_XATTR_SET_WRAPPER(zpl_xattr_trusted_set);
623 xattr_handler_t zpl_xattr_trusted_handler = {
624 .prefix = XATTR_TRUSTED_PREFIX,
625 .get = zpl_xattr_trusted_get,
626 .set = zpl_xattr_trusted_set,
630 __zpl_xattr_security_get(struct inode *ip, const char *name,
631 void *value, size_t size)
636 if (strcmp(name, "") == 0)
639 xattr_name = kmem_asprintf("%s%s", XATTR_SECURITY_PREFIX, name);
640 error = zpl_xattr_get(ip, xattr_name, value, size);
645 ZPL_XATTR_GET_WRAPPER(zpl_xattr_security_get);
648 __zpl_xattr_security_set(struct inode *ip, const char *name,
649 const void *value, size_t size, int flags)
654 if (strcmp(name, "") == 0)
657 xattr_name = kmem_asprintf("%s%s", XATTR_SECURITY_PREFIX, name);
658 error = zpl_xattr_set(ip, xattr_name, value, size, flags);
663 ZPL_XATTR_SET_WRAPPER(zpl_xattr_security_set);
665 #ifdef HAVE_CALLBACK_SECURITY_INODE_INIT_SECURITY
667 __zpl_xattr_security_init(struct inode *ip, const struct xattr *xattrs,
670 const struct xattr *xattr;
673 for (xattr = xattrs; xattr->name != NULL; xattr++) {
674 error = __zpl_xattr_security_set(ip,
675 xattr->name, xattr->value, xattr->value_len, 0);
685 zpl_xattr_security_init(struct inode *ip, struct inode *dip,
686 const struct qstr *qstr)
688 return security_inode_init_security(ip, dip, qstr,
689 &__zpl_xattr_security_init, NULL);
694 zpl_xattr_security_init(struct inode *ip, struct inode *dip,
695 const struct qstr *qstr)
702 error = zpl_security_inode_init_security(ip, dip, qstr,
703 &name, &value, &len);
705 if (error == -EOPNOTSUPP)
710 error = __zpl_xattr_security_set(ip, name, value, len, 0);
717 #endif /* HAVE_CALLBACK_SECURITY_INODE_INIT_SECURITY */
719 xattr_handler_t zpl_xattr_security_handler = {
720 .prefix = XATTR_SECURITY_PREFIX,
721 .get = zpl_xattr_security_get,
722 .set = zpl_xattr_security_set,
726 zpl_set_acl(struct inode *ip, int type, struct posix_acl *acl)
728 struct super_block *sb = ITOZSB(ip)->z_sb;
729 char *name, *value = NULL;
733 if (S_ISLNK(ip->i_mode))
734 return (-EOPNOTSUPP);
737 case ACL_TYPE_ACCESS:
738 name = POSIX_ACL_XATTR_ACCESS;
740 zpl_equivmode_t mode = ip->i_mode;
741 error = posix_acl_equiv_mode(acl, &mode);
746 * The mode bits will have been set by
747 * ->zfs_setattr()->zfs_acl_chmod_setattr()
748 * using the ZFS ACL conversion. If they
749 * differ from the Posix ACL conversion dirty
750 * the inode to write the Posix mode bits.
752 if (ip->i_mode != mode) {
754 ip->i_ctime = current_fs_time(sb);
755 mark_inode_dirty(ip);
764 case ACL_TYPE_DEFAULT:
765 name = POSIX_ACL_XATTR_DEFAULT;
766 if (!S_ISDIR(ip->i_mode))
767 return (acl ? -EACCES : 0);
775 size = posix_acl_xattr_size(acl->a_count);
776 value = kmem_alloc(size, KM_SLEEP);
778 error = zpl_acl_to_xattr(acl, value, size);
780 kmem_free(value, size);
785 error = zpl_xattr_set(ip, name, value, size, 0);
787 kmem_free(value, size);
791 zpl_set_cached_acl(ip, type, acl);
793 zpl_forget_cached_acl(ip, type);
800 zpl_get_acl(struct inode *ip, int type)
802 struct posix_acl *acl;
807 #ifdef HAVE_POSIX_ACL_CACHING
808 acl = get_cached_acl(ip, type);
809 if (acl != ACL_NOT_CACHED)
811 #endif /* HAVE_POSIX_ACL_CACHING */
814 case ACL_TYPE_ACCESS:
815 name = POSIX_ACL_XATTR_ACCESS;
817 case ACL_TYPE_DEFAULT:
818 name = POSIX_ACL_XATTR_DEFAULT;
821 return ERR_PTR(-EINVAL);
824 size = zpl_xattr_get(ip, name, NULL, 0);
826 value = kmem_alloc(size, KM_PUSHPAGE);
827 size = zpl_xattr_get(ip, name, value, size);
831 acl = zpl_acl_from_xattr(value, size);
832 } else if (size == -ENODATA || size == -ENOSYS) {
839 kmem_free(value, size);
842 zpl_set_cached_acl(ip, type, acl);
847 #if !defined(HAVE_GET_ACL)
849 __zpl_check_acl(struct inode *ip, int mask)
851 struct posix_acl *acl;
854 acl = zpl_get_acl(ip, ACL_TYPE_ACCESS);
856 return (PTR_ERR(acl));
859 error = posix_acl_permission(ip, acl, mask);
860 zpl_posix_acl_release(acl);
867 #if defined(HAVE_CHECK_ACL_WITH_FLAGS)
869 zpl_check_acl(struct inode *ip, int mask, unsigned int flags)
871 return __zpl_check_acl(ip, mask);
873 #elif defined(HAVE_CHECK_ACL)
875 zpl_check_acl(struct inode *ip, int mask)
877 return __zpl_check_acl(ip , mask);
879 #elif defined(HAVE_PERMISSION_WITH_NAMEIDATA)
881 zpl_permission(struct inode *ip, int mask, struct nameidata *nd)
883 return generic_permission(ip, mask, __zpl_check_acl);
885 #elif defined(HAVE_PERMISSION)
887 zpl_permission(struct inode *ip, int mask)
889 return generic_permission(ip, mask, __zpl_check_acl);
891 #endif /* HAVE_CHECK_ACL | HAVE_PERMISSION */
892 #endif /* !HAVE_GET_ACL */
895 zpl_init_acl(struct inode *ip, struct inode *dir)
897 struct posix_acl *acl = NULL;
900 if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
903 if (!S_ISLNK(ip->i_mode)) {
904 if (ITOZSB(ip)->z_acl_type == ZFS_ACLTYPE_POSIXACL) {
905 acl = zpl_get_acl(dir, ACL_TYPE_DEFAULT);
907 return (PTR_ERR(acl));
911 ip->i_mode &= ~current_umask();
912 ip->i_ctime = current_fs_time(ITOZSB(ip)->z_sb);
913 mark_inode_dirty(ip);
918 if ((ITOZSB(ip)->z_acl_type == ZFS_ACLTYPE_POSIXACL) && acl) {
921 if (S_ISDIR(ip->i_mode)) {
922 error = zpl_set_acl(ip, ACL_TYPE_DEFAULT, acl);
928 error = posix_acl_create(&acl,GFP_KERNEL, &mode);
931 mark_inode_dirty(ip);
933 error = zpl_set_acl(ip, ACL_TYPE_ACCESS, acl);
937 zpl_posix_acl_release(acl);
943 zpl_chmod_acl(struct inode *ip)
945 struct posix_acl *acl;
948 if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
951 if (S_ISLNK(ip->i_mode))
952 return (-EOPNOTSUPP);
954 acl = zpl_get_acl(ip, ACL_TYPE_ACCESS);
955 if (IS_ERR(acl) || !acl)
956 return (PTR_ERR(acl));
958 error = posix_acl_chmod(&acl,GFP_KERNEL, ip->i_mode);
960 error = zpl_set_acl(ip,ACL_TYPE_ACCESS, acl);
962 zpl_posix_acl_release(acl);
968 zpl_xattr_acl_list(struct inode *ip, char *list, size_t list_size,
969 const char *name, size_t name_len, int type)
974 if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
978 case ACL_TYPE_ACCESS:
979 xattr_name = POSIX_ACL_XATTR_ACCESS;
980 xattr_size = sizeof(xattr_name);
982 case ACL_TYPE_DEFAULT:
983 xattr_name = POSIX_ACL_XATTR_DEFAULT;
984 xattr_size = sizeof(xattr_name);
990 if (list && xattr_size <= list_size)
991 memcpy(list, xattr_name, xattr_size);
996 #ifdef HAVE_DENTRY_XATTR_LIST
998 zpl_xattr_acl_list_access(struct dentry *dentry, char *list,
999 size_t list_size, const char *name, size_t name_len, int type)
1001 ASSERT3S(type, ==, ACL_TYPE_ACCESS);
1002 return zpl_xattr_acl_list(dentry->d_inode,
1003 list, list_size, name, name_len, type);
1007 zpl_xattr_acl_list_default(struct dentry *dentry, char *list,
1008 size_t list_size, const char *name, size_t name_len, int type)
1010 ASSERT3S(type, ==, ACL_TYPE_DEFAULT);
1011 return zpl_xattr_acl_list(dentry->d_inode,
1012 list, list_size, name, name_len, type);
1018 zpl_xattr_acl_list_access(struct inode *ip, char *list, size_t list_size,
1019 const char *name, size_t name_len)
1021 return zpl_xattr_acl_list(ip,
1022 list, list_size, name, name_len, ACL_TYPE_ACCESS);
1026 zpl_xattr_acl_list_default(struct inode *ip, char *list, size_t list_size,
1027 const char *name, size_t name_len)
1029 return zpl_xattr_acl_list(ip,
1030 list, list_size, name, name_len, ACL_TYPE_DEFAULT);
1032 #endif /* HAVE_DENTRY_XATTR_LIST */
1035 zpl_xattr_acl_get(struct inode *ip, const char *name,
1036 void *buffer, size_t size, int type)
1038 struct posix_acl *acl;
1041 if (strcmp(name, "") != 0)
1044 if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
1045 return (-EOPNOTSUPP);
1047 acl = zpl_get_acl(ip, type);
1049 return (PTR_ERR(acl));
1053 error = zpl_acl_to_xattr(acl, buffer, size);
1054 zpl_posix_acl_release(acl);
1059 #ifdef HAVE_DENTRY_XATTR_GET
1061 zpl_xattr_acl_get_access(struct dentry *dentry, const char *name,
1062 void *buffer, size_t size, int type)
1064 ASSERT3S(type, ==, ACL_TYPE_ACCESS);
1065 return zpl_xattr_acl_get(dentry->d_inode, name, buffer, size, type);
1069 zpl_xattr_acl_get_default(struct dentry *dentry, const char *name,
1070 void *buffer, size_t size, int type)
1072 ASSERT3S(type, ==, ACL_TYPE_DEFAULT);
1073 return zpl_xattr_acl_get(dentry->d_inode, name, buffer, size, type);
1079 zpl_xattr_acl_get_access(struct inode *ip, const char *name,
1080 void *buffer, size_t size)
1082 return zpl_xattr_acl_get(ip, name, buffer, size, ACL_TYPE_ACCESS);
1086 zpl_xattr_acl_get_default(struct inode *ip, const char *name,
1087 void *buffer, size_t size)
1089 return zpl_xattr_acl_get(ip, name, buffer, size, ACL_TYPE_DEFAULT);
1091 #endif /* HAVE_DENTRY_XATTR_GET */
1094 zpl_xattr_acl_set(struct inode *ip, const char *name,
1095 const void *value, size_t size, int flags, int type)
1097 struct posix_acl *acl;
1100 if (strcmp(name, "") != 0)
1103 if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
1104 return (-EOPNOTSUPP);
1106 if (!zpl_inode_owner_or_capable(ip))
1110 acl = zpl_acl_from_xattr(value, size);
1112 return (PTR_ERR(acl));
1114 error = posix_acl_valid(acl);
1116 zpl_posix_acl_release(acl);
1124 error = zpl_set_acl(ip, type, acl);
1125 zpl_posix_acl_release(acl);
1130 #ifdef HAVE_DENTRY_XATTR_SET
1132 zpl_xattr_acl_set_access(struct dentry *dentry, const char *name,
1133 const void *value, size_t size, int flags, int type)
1135 ASSERT3S(type, ==, ACL_TYPE_ACCESS);
1136 return zpl_xattr_acl_set(dentry->d_inode,
1137 name, value, size, flags, type);
1141 zpl_xattr_acl_set_default(struct dentry *dentry, const char *name,
1142 const void *value, size_t size,int flags, int type)
1144 ASSERT3S(type, ==, ACL_TYPE_DEFAULT);
1145 return zpl_xattr_acl_set(dentry->d_inode,
1146 name, value, size, flags, type);
1152 zpl_xattr_acl_set_access(struct inode *ip, const char *name,
1153 const void *value, size_t size, int flags)
1155 return zpl_xattr_acl_set(ip,
1156 name, value, size, flags, ACL_TYPE_ACCESS);
1160 zpl_xattr_acl_set_default(struct inode *ip, const char *name,
1161 const void *value, size_t size, int flags)
1163 return zpl_xattr_acl_set(ip,
1164 name, value, size, flags, ACL_TYPE_DEFAULT);
1166 #endif /* HAVE_DENTRY_XATTR_SET */
1168 struct xattr_handler zpl_xattr_acl_access_handler =
1170 .prefix = POSIX_ACL_XATTR_ACCESS,
1171 .list = zpl_xattr_acl_list_access,
1172 .get = zpl_xattr_acl_get_access,
1173 .set = zpl_xattr_acl_set_access,
1174 #ifdef HAVE_DENTRY_XATTR_LIST
1175 .flags = ACL_TYPE_ACCESS,
1176 #endif /* HAVE_DENTRY_XATTR_LIST */
1179 struct xattr_handler zpl_xattr_acl_default_handler =
1181 .prefix = POSIX_ACL_XATTR_DEFAULT,
1182 .list = zpl_xattr_acl_list_default,
1183 .get = zpl_xattr_acl_get_default,
1184 .set = zpl_xattr_acl_set_default,
1185 #ifdef HAVE_DENTRY_XATTR_LIST
1186 .flags = ACL_TYPE_DEFAULT,
1187 #endif /* HAVE_DENTRY_XATTR_LIST */
1190 xattr_handler_t *zpl_xattr_handlers[] = {
1191 &zpl_xattr_security_handler,
1192 &zpl_xattr_trusted_handler,
1193 &zpl_xattr_user_handler,
1194 &zpl_xattr_acl_access_handler,
1195 &zpl_xattr_acl_default_handler,