1 /* SPDX-License-Identifier: GPL-2.0-or-later
2 *
3 * Copyright (C) 2022 Oracle. All Rights Reserved.
4 * Author: Allison Henderson <allison.henderson@oracle.com>
5 */
6 #ifndef __XFS_ATTR_ITEM_H__
7 #define __XFS_ATTR_ITEM_H__
8
9 /* kernel only ATTRI/ATTRD definitions */
10
11 struct xfs_mount;
12 struct kmem_zone;
13
14 struct xfs_attri_log_nameval {
15 struct xfs_log_iovec name;
16 struct xfs_log_iovec new_name; /* PPTR_REPLACE only */
17 struct xfs_log_iovec value;
18 struct xfs_log_iovec new_value; /* PPTR_REPLACE only */
19 refcount_t refcount;
20
21 /* name and value follow the end of this struct */
22 };
23
24 /*
25 * This is the "attr intention" log item. It is used to log the fact that some
26 * extended attribute operations need to be processed. An operation is
27 * currently either a set or remove. Set or remove operations are described by
28 * the xfs_attr_intent which may be logged to this intent.
29 *
30 * During a normal attr operation, name and value point to the name and value
31 * fields of the caller's xfs_da_args structure. During a recovery, the name
32 * and value buffers are copied from the log, and stored in a trailing buffer
33 * attached to the xfs_attr_intent until they are committed. They are freed
34 * when the xfs_attr_intent itself is freed when the work is done.
35 */
36 struct xfs_attri_log_item {
37 struct xfs_log_item attri_item;
38 atomic_t attri_refcount;
39 struct xfs_attri_log_nameval *attri_nameval;
40 struct xfs_attri_log_format attri_format;
41 };
42
43 /*
44 * This is the "attr done" log item. It is used to log the fact that some attrs
45 * earlier mentioned in an attri item have been freed.
46 */
47 struct xfs_attrd_log_item {
48 struct xfs_log_item attrd_item;
49 struct xfs_attri_log_item *attrd_attrip;
50 struct xfs_attrd_log_format attrd_format;
51 };
52
53 extern struct kmem_cache *xfs_attri_cache;
54 extern struct kmem_cache *xfs_attrd_cache;
55
56 enum xfs_attr_defer_op {
57 XFS_ATTR_DEFER_SET,
58 XFS_ATTR_DEFER_REMOVE,
59 XFS_ATTR_DEFER_REPLACE,
60 };
61
62 void xfs_attr_defer_add(struct xfs_da_args *args, enum xfs_attr_defer_op op);
63
64 #endif /* __XFS_ATTR_ITEM_H__ */
65
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