2 * Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
3 * Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 /** @addtogroup lwext4
34 * @brief Extended Attribute manipulation.
44 #include "ext4_config.h"
45 #include "ext4_types.h"
46 #include "misc/tree.h"
47 #include "misc/queue.h"
49 struct ext4_xattr_item {
50 /* This attribute should be stored in inode body */
59 RB_ENTRY(ext4_xattr_item) node;
62 struct ext4_xattr_ref {
64 struct ext4_block block;
65 struct ext4_inode_ref *inode_ref;
71 struct ext4_xattr_item *iter_from;
73 RB_HEAD(ext4_xattr_tree,
74 ext4_xattr_item) root;
77 #define EXT4_XATTR_ITERATE_CONT 0
78 #define EXT4_XATTR_ITERATE_STOP 1
79 #define EXT4_XATTR_ITERATE_PAUSE 2
81 int ext4_fs_get_xattr_ref(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref,
82 struct ext4_xattr_ref *ref);
84 void ext4_fs_put_xattr_ref(struct ext4_xattr_ref *ref);
86 int ext4_fs_set_xattr(struct ext4_xattr_ref *ref, uint8_t name_index,
87 const char *name, size_t name_len, const void *data,
88 size_t data_size, bool replace);
90 int ext4_fs_remove_xattr(struct ext4_xattr_ref *ref, uint8_t name_index,
91 const char *name, size_t name_len);
93 int ext4_fs_get_xattr(struct ext4_xattr_ref *ref, uint8_t name_index,
94 const char *name, size_t name_len, void *buf,
95 size_t buf_size, size_t *data_size);
97 void ext4_fs_xattr_iterate(struct ext4_xattr_ref *ref,
98 int (*iter)(struct ext4_xattr_ref *ref,
99 struct ext4_xattr_item *item));
101 void ext4_fs_xattr_iterate_reset(struct ext4_xattr_ref *ref);
103 const char *ext4_extract_xattr_name(const char *full_name, size_t full_name_len,
104 uint8_t *name_index, size_t *name_len);
106 const char *ext4_get_xattr_name_prefix(uint8_t name_index,
107 size_t *ret_prefix_len);