1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef __FAST_COMMIT_H__
4 #define __FAST_COMMIT_H__
7 * Note this file is present in e2fsprogs/lib/ext2fs/fast_commit.h and
8 * linux/fs/ext4/fast_commit.h. These file should always be byte identical.
11 /* Fast commit tags */
12 #define EXT4_FC_TAG_ADD_RANGE 0x0001
13 #define EXT4_FC_TAG_DEL_RANGE 0x0002
14 #define EXT4_FC_TAG_CREAT 0x0003
15 #define EXT4_FC_TAG_LINK 0x0004
16 #define EXT4_FC_TAG_UNLINK 0x0005
17 #define EXT4_FC_TAG_INODE 0x0006
18 #define EXT4_FC_TAG_PAD 0x0007
19 #define EXT4_FC_TAG_TAIL 0x0008
20 #define EXT4_FC_TAG_HEAD 0x0009
22 #define EXT4_FC_SUPPORTED_FEATURES 0x0
24 /* On disk fast commit tlv value structures */
26 /* Fast commit on disk tag length structure */
32 /* Value structure for tag EXT4_FC_TAG_HEAD. */
38 /* Value structure for EXT4_FC_TAG_ADD_RANGE. */
39 struct ext4_fc_add_range {
44 /* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */
45 struct ext4_fc_del_range {
52 * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK
53 * and EXT4_FC_TAG_UNLINK.
55 struct ext4_fc_dentry_info {
61 /* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */
62 struct ext4_fc_inode {
67 /* Value structure for tag EXT4_FC_TAG_TAIL. */
74 #define EXT4_FC_TAG_BASE_LEN (sizeof(struct ext4_fc_tl))
77 * Fast commit status codes
80 EXT4_FC_STATUS_OK = 0,
81 EXT4_FC_STATUS_INELIGIBLE,
82 EXT4_FC_STATUS_SKIPPED,
83 EXT4_FC_STATUS_FAILED,
87 * Fast commit ineligiblity reasons:
90 EXT4_FC_REASON_XATTR = 0,
91 EXT4_FC_REASON_CROSS_RENAME,
92 EXT4_FC_REASON_JOURNAL_FLAG_CHANGE,
94 EXT4_FC_REASON_SWAP_BOOT,
95 EXT4_FC_REASON_RESIZE,
96 EXT4_FC_REASON_RENAME_DIR,
97 EXT4_FC_REASON_FALLOC_RANGE,
98 EXT4_FC_REASON_INODE_JOURNAL_DATA,
104 * In memory list of dentry updates that are performed on the file
105 * system used by fast commit code.
107 struct ext4_fc_dentry_update {
108 int fcd_op; /* Type of update create / unlink / link */
109 int fcd_parent; /* Parent inode number */
110 int fcd_ino; /* Inode number */
111 struct qstr fcd_name; /* Dirent name */
112 unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */
113 struct list_head fcd_list;
114 struct list_head fcd_dilist;
117 struct ext4_fc_stats {
118 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX];
119 unsigned long fc_num_commits;
120 unsigned long fc_ineligible_commits;
121 unsigned long fc_failed_commits;
122 unsigned long fc_skipped_commits;
123 unsigned long fc_numblks;
124 u64 s_fc_avg_commit_time;
127 #define EXT4_FC_REPLAY_REALLOC_INCREMENT 4
130 * Physical block regions added to different inodes due to fast commit
131 * recovery. These are set during the SCAN phase. During the replay phase,
132 * our allocator excludes these from its allocation. This ensures that
133 * we don't accidentally allocating a block that is going to be used by
136 struct ext4_fc_alloc_region {
143 * Fast commit replay state.
145 struct ext4_fc_replay_state {
146 int fc_replay_num_tags;
147 int fc_replay_expected_off;
151 struct ext4_fc_alloc_region *fc_regions;
152 int fc_regions_size, fc_regions_used, fc_regions_valid;
153 int *fc_modified_inodes;
154 int fc_modified_inodes_used, fc_modified_inodes_size;
157 #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1)
160 static inline const char *tag2str(__u16 tag)
163 case EXT4_FC_TAG_LINK:
165 case EXT4_FC_TAG_UNLINK:
167 case EXT4_FC_TAG_ADD_RANGE:
169 case EXT4_FC_TAG_CREAT:
170 return "CREAT_DENTRY";
171 case EXT4_FC_TAG_DEL_RANGE:
173 case EXT4_FC_TAG_INODE:
175 case EXT4_FC_TAG_PAD:
177 case EXT4_FC_TAG_TAIL:
179 case EXT4_FC_TAG_HEAD:
186 #endif /* __FAST_COMMIT_H__ */