1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef __FAST_COMMIT_H__
4 #define __FAST_COMMIT_H__
7 #define EXT4_FC_TAG_ADD_RANGE 0x0001
8 #define EXT4_FC_TAG_DEL_RANGE 0x0002
9 #define EXT4_FC_TAG_CREAT 0x0003
10 #define EXT4_FC_TAG_LINK 0x0004
11 #define EXT4_FC_TAG_UNLINK 0x0005
12 #define EXT4_FC_TAG_INODE 0x0006
13 #define EXT4_FC_TAG_PAD 0x0007
14 #define EXT4_FC_TAG_TAIL 0x0008
15 #define EXT4_FC_TAG_HEAD 0x0009
17 #define EXT4_FC_SUPPORTED_FEATURES 0x0
19 /* On disk fast commit tlv value structures */
21 /* Fast commit on disk tag length structure */
27 /* Value structure for tag EXT4_FC_TAG_HEAD. */
33 /* Value structure for EXT4_FC_TAG_ADD_RANGE. */
34 struct ext4_fc_add_range {
39 /* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */
40 struct ext4_fc_del_range {
47 * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK
48 * and EXT4_FC_TAG_UNLINK.
50 struct ext4_fc_dentry_info {
56 /* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */
57 struct ext4_fc_inode {
62 /* Value structure for tag EXT4_FC_TAG_TAIL. */
69 * In memory list of dentry updates that are performed on the file
70 * system used by fast commit code.
72 struct ext4_fc_dentry_update {
73 int fcd_op; /* Type of update create / unlink / link */
74 int fcd_parent; /* Parent inode number */
75 int fcd_ino; /* Inode number */
76 struct qstr fcd_name; /* Dirent name */
77 unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */
78 struct list_head fcd_list;
82 * Fast commit reason codes
86 * Commit status codes:
88 EXT4_FC_REASON_OK = 0,
89 EXT4_FC_REASON_INELIGIBLE,
90 EXT4_FC_REASON_ALREADY_COMMITTED,
91 EXT4_FC_REASON_FC_START_FAILED,
92 EXT4_FC_REASON_FC_FAILED,
95 * Fast commit ineligiblity reasons:
97 EXT4_FC_REASON_XATTR = 0,
98 EXT4_FC_REASON_CROSS_RENAME,
99 EXT4_FC_REASON_JOURNAL_FLAG_CHANGE,
100 EXT4_FC_REASON_NOMEM,
101 EXT4_FC_REASON_SWAP_BOOT,
102 EXT4_FC_REASON_RESIZE,
103 EXT4_FC_REASON_RENAME_DIR,
104 EXT4_FC_REASON_FALLOC_RANGE,
105 EXT4_FC_COMMIT_FAILED,
109 struct ext4_fc_stats {
110 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX];
111 unsigned long fc_num_commits;
112 unsigned long fc_ineligible_commits;
113 unsigned long fc_numblks;
116 #define EXT4_FC_REPLAY_REALLOC_INCREMENT 4
119 * Physical block regions added to different inodes due to fast commit
120 * recovery. These are set during the SCAN phase. During the replay phase,
121 * our allocator excludes these from its allocation. This ensures that
122 * we don't accidentally allocating a block that is going to be used by
125 struct ext4_fc_alloc_region {
132 * Fast commit replay state.
134 struct ext4_fc_replay_state {
135 int fc_replay_num_tags;
136 int fc_replay_expected_off;
140 struct ext4_fc_alloc_region *fc_regions;
141 int fc_regions_size, fc_regions_used, fc_regions_valid;
142 int *fc_modified_inodes;
143 int fc_modified_inodes_used, fc_modified_inodes_size;
146 #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1)
148 #define fc_for_each_tl(__start, __end, __tl) \
149 for (tl = (struct ext4_fc_tl *)start; \
150 (u8 *)tl < (u8 *)end; \
151 tl = (struct ext4_fc_tl *)((u8 *)tl + \
152 sizeof(struct ext4_fc_tl) + \
153 + le16_to_cpu(tl->fc_len)))
156 #endif /* __FAST_COMMIT_H__ */