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1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef __FAST_COMMIT_H__4#define __FAST_COMMIT_H__5 6/*7 * Note this file is present in e2fsprogs/lib/ext2fs/fast_commit.h and8 * linux/fs/ext4/fast_commit.h. These file should always be byte identical.9 */10 11/* Fast commit tags */12#define EXT4_FC_TAG_ADD_RANGE 0x000113#define EXT4_FC_TAG_DEL_RANGE 0x000214#define EXT4_FC_TAG_CREAT 0x000315#define EXT4_FC_TAG_LINK 0x000416#define EXT4_FC_TAG_UNLINK 0x000517#define EXT4_FC_TAG_INODE 0x000618#define EXT4_FC_TAG_PAD 0x000719#define EXT4_FC_TAG_TAIL 0x000820#define EXT4_FC_TAG_HEAD 0x000921 22#define EXT4_FC_SUPPORTED_FEATURES 0x023 24/* On disk fast commit tlv value structures */25 26/* Fast commit on disk tag length structure */27struct ext4_fc_tl {28 __le16 fc_tag;29 __le16 fc_len;30};31 32/* Value structure for tag EXT4_FC_TAG_HEAD. */33struct ext4_fc_head {34 __le32 fc_features;35 __le32 fc_tid;36};37 38/* Value structure for EXT4_FC_TAG_ADD_RANGE. */39struct ext4_fc_add_range {40 __le32 fc_ino;41 __u8 fc_ex[12];42};43 44/* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */45struct ext4_fc_del_range {46 __le32 fc_ino;47 __le32 fc_lblk;48 __le32 fc_len;49};50 51/*52 * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK53 * and EXT4_FC_TAG_UNLINK.54 */55struct ext4_fc_dentry_info {56 __le32 fc_parent_ino;57 __le32 fc_ino;58 __u8 fc_dname[];59};60 61/* Value structure for EXT4_FC_TAG_INODE. */62struct ext4_fc_inode {63 __le32 fc_ino;64 __u8 fc_raw_inode[];65};66 67/* Value structure for tag EXT4_FC_TAG_TAIL. */68struct ext4_fc_tail {69 __le32 fc_tid;70 __le32 fc_crc;71};72 73/* Tag base length */74#define EXT4_FC_TAG_BASE_LEN (sizeof(struct ext4_fc_tl))75 76/*77 * Fast commit status codes78 */79enum {80 EXT4_FC_STATUS_OK = 0,81 EXT4_FC_STATUS_INELIGIBLE,82 EXT4_FC_STATUS_SKIPPED,83 EXT4_FC_STATUS_FAILED,84};85 86/*87 * Fast commit ineligiblity reasons:88 */89enum {90 EXT4_FC_REASON_XATTR = 0,91 EXT4_FC_REASON_CROSS_RENAME,92 EXT4_FC_REASON_JOURNAL_FLAG_CHANGE,93 EXT4_FC_REASON_NOMEM,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,99 EXT4_FC_REASON_ENCRYPTED_FILENAME,100 EXT4_FC_REASON_MAX101};102 103#ifdef __KERNEL__104/*105 * In memory list of dentry updates that are performed on the file106 * system used by fast commit code.107 */108struct ext4_fc_dentry_update {109 int fcd_op; /* Type of update create / unlink / link */110 int fcd_parent; /* Parent inode number */111 int fcd_ino; /* Inode number */112 struct qstr fcd_name; /* Dirent name */113 unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */114 struct list_head fcd_list;115 struct list_head fcd_dilist;116};117 118struct ext4_fc_stats {119 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX];120 unsigned long fc_num_commits;121 unsigned long fc_ineligible_commits;122 unsigned long fc_failed_commits;123 unsigned long fc_skipped_commits;124 unsigned long fc_numblks;125 u64 s_fc_avg_commit_time;126};127 128#define EXT4_FC_REPLAY_REALLOC_INCREMENT 4129 130/*131 * Physical block regions added to different inodes due to fast commit132 * recovery. These are set during the SCAN phase. During the replay phase,133 * our allocator excludes these from its allocation. This ensures that134 * we don't accidentally allocating a block that is going to be used by135 * another inode.136 */137struct ext4_fc_alloc_region {138 ext4_lblk_t lblk;139 ext4_fsblk_t pblk;140 int ino, len;141};142 143/*144 * Fast commit replay state.145 */146struct ext4_fc_replay_state {147 int fc_replay_num_tags;148 int fc_replay_expected_off;149 int fc_current_pass;150 int fc_cur_tag;151 int fc_crc;152 struct ext4_fc_alloc_region *fc_regions;153 int fc_regions_size, fc_regions_used, fc_regions_valid;154 int *fc_modified_inodes;155 int fc_modified_inodes_used, fc_modified_inodes_size;156};157 158#define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1)159#endif160 161static inline const char *tag2str(__u16 tag)162{163 switch (tag) {164 case EXT4_FC_TAG_LINK:165 return "ADD_ENTRY";166 case EXT4_FC_TAG_UNLINK:167 return "DEL_ENTRY";168 case EXT4_FC_TAG_ADD_RANGE:169 return "ADD_RANGE";170 case EXT4_FC_TAG_CREAT:171 return "CREAT_DENTRY";172 case EXT4_FC_TAG_DEL_RANGE:173 return "DEL_RANGE";174 case EXT4_FC_TAG_INODE:175 return "INODE";176 case EXT4_FC_TAG_PAD:177 return "PAD";178 case EXT4_FC_TAG_TAIL:179 return "TAIL";180 case EXT4_FC_TAG_HEAD:181 return "HEAD";182 default:183 return "ERROR";184 }185}186 187#endif /* __FAST_COMMIT_H__ */188