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 and 8 * 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 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 21 22 #define EXT4_FC_SUPPORTED_FEATURES 0x0 23 24 /* On disk fast commit tlv value structures */ 25 26 /* Fast commit on disk tag length structure */ 27 struct ext4_fc_tl { 28 __le16 fc_tag; 29 __le16 fc_len; 30 }; 31 32 /* Value structure for tag EXT4_FC_TAG_HEAD. */ 33 struct ext4_fc_head { 34 __le32 fc_features; 35 __le32 fc_tid; 36 }; 37 38 /* Value structure for EXT4_FC_TAG_ADD_RANGE. */ 39 struct 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. */ 45 struct 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_LINK 53 * and EXT4_FC_TAG_UNLINK. 54 */ 55 struct 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. */ 62 struct ext4_fc_inode { 63 __le32 fc_ino; 64 __u8 fc_raw_inode[]; 65 }; 66 67 /* Value structure for tag EXT4_FC_TAG_TAIL. */ 68 struct 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 codes 78 */ 79 enum { 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 */ 89 enum { 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_MIGRATE, 101 EXT4_FC_REASON_VERITY, 102 EXT4_FC_REASON_MOVE_EXT, 103 EXT4_FC_REASON_MAX 104 }; 105 106 #ifdef __KERNEL__ 107 /* 108 * In memory list of dentry updates that are performed on the file 109 * system used by fast commit code. 110 */ 111 struct ext4_fc_dentry_update { 112 int fcd_op; /* Type of update create / unlink / link */ 113 int fcd_parent; /* Parent inode number */ 114 int fcd_ino; /* Inode number */ 115 struct name_snapshot fcd_name; /* Dirent name */ 116 struct list_head fcd_list; 117 struct list_head fcd_dilist; 118 }; 119 120 struct ext4_fc_stats { 121 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX]; 122 unsigned long fc_num_commits; 123 unsigned long fc_ineligible_commits; 124 unsigned long fc_failed_commits; 125 unsigned long fc_skipped_commits; 126 unsigned long fc_numblks; 127 u64 s_fc_avg_commit_time; 128 }; 129 130 #define EXT4_FC_REPLAY_REALLOC_INCREMENT 4 131 132 /* 133 * Physical block regions added to different inodes due to fast commit 134 * recovery. These are set during the SCAN phase. During the replay phase, 135 * our allocator excludes these from its allocation. This ensures that 136 * we don't accidentally allocating a block that is going to be used by 137 * another inode. 138 */ 139 struct ext4_fc_alloc_region { 140 ext4_lblk_t lblk; 141 ext4_fsblk_t pblk; 142 int ino, len; 143 }; 144 145 /* 146 * Fast commit replay state. 147 */ 148 struct ext4_fc_replay_state { 149 int fc_replay_num_tags; 150 int fc_replay_expected_off; 151 int fc_current_pass; 152 int fc_cur_tag; 153 int fc_crc; 154 struct ext4_fc_alloc_region *fc_regions; 155 int fc_regions_size, fc_regions_used, fc_regions_valid; 156 int *fc_modified_inodes; 157 int fc_modified_inodes_used, fc_modified_inodes_size; 158 }; 159 160 #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1) 161 #endif 162 163 static inline const char *tag2str(__u16 tag) 164 { 165 switch (tag) { 166 case EXT4_FC_TAG_LINK: 167 return "ADD_ENTRY"; 168 case EXT4_FC_TAG_UNLINK: 169 return "DEL_ENTRY"; 170 case EXT4_FC_TAG_ADD_RANGE: 171 return "ADD_RANGE"; 172 case EXT4_FC_TAG_CREAT: 173 return "CREAT_DENTRY"; 174 case EXT4_FC_TAG_DEL_RANGE: 175 return "DEL_RANGE"; 176 case EXT4_FC_TAG_INODE: 177 return "INODE"; 178 case EXT4_FC_TAG_PAD: 179 return "PAD"; 180 case EXT4_FC_TAG_TAIL: 181 return "TAIL"; 182 case EXT4_FC_TAG_HEAD: 183 return "HEAD"; 184 default: 185 return "ERROR"; 186 } 187 } 188 189 #endif /* __FAST_COMMIT_H__ */ 190