1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __FAST_COMMIT_H__ 4 #define __FAST_COMMIT_H__ 5 6 /* Number of blocks in journal area to allocate for fast commits */ 7 #define EXT4_NUM_FC_BLKS 256 8 9 /* Fast commit tags */ 10 #define EXT4_FC_TAG_ADD_RANGE 0x0001 11 #define EXT4_FC_TAG_DEL_RANGE 0x0002 12 #define EXT4_FC_TAG_CREAT 0x0003 13 #define EXT4_FC_TAG_LINK 0x0004 14 #define EXT4_FC_TAG_UNLINK 0x0005 15 #define EXT4_FC_TAG_INODE 0x0006 16 #define EXT4_FC_TAG_PAD 0x0007 17 #define EXT4_FC_TAG_TAIL 0x0008 18 #define EXT4_FC_TAG_HEAD 0x0009 19 20 #define EXT4_FC_SUPPORTED_FEATURES 0x0 21 22 /* On disk fast commit tlv value structures */ 23 24 /* Fast commit on disk tag length structure */ 25 struct ext4_fc_tl { 26 __le16 fc_tag; 27 __le16 fc_len; 28 }; 29 30 /* Value structure for tag EXT4_FC_TAG_HEAD. */ 31 struct ext4_fc_head { 32 __le32 fc_features; 33 __le32 fc_tid; 34 }; 35 36 /* Value structure for EXT4_FC_TAG_ADD_RANGE. */ 37 struct ext4_fc_add_range { 38 __le32 fc_ino; 39 __u8 fc_ex[12]; 40 }; 41 42 /* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */ 43 struct ext4_fc_del_range { 44 __le32 fc_ino; 45 __le32 fc_lblk; 46 __le32 fc_len; 47 }; 48 49 /* 50 * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK 51 * and EXT4_FC_TAG_UNLINK. 52 */ 53 struct ext4_fc_dentry_info { 54 __le32 fc_parent_ino; 55 __le32 fc_ino; 56 u8 fc_dname[0]; 57 }; 58 59 /* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */ 60 struct ext4_fc_inode { 61 __le32 fc_ino; 62 __u8 fc_raw_inode[0]; 63 }; 64 65 /* Value structure for tag EXT4_FC_TAG_TAIL. */ 66 struct ext4_fc_tail { 67 __le32 fc_tid; 68 __le32 fc_crc; 69 }; 70 71 /* 72 * In memory list of dentry updates that are performed on the file 73 * system used by fast commit code. 74 */ 75 struct ext4_fc_dentry_update { 76 int fcd_op; /* Type of update create / unlink / link */ 77 int fcd_parent; /* Parent inode number */ 78 int fcd_ino; /* Inode number */ 79 struct qstr fcd_name; /* Dirent name */ 80 unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */ 81 struct list_head fcd_list; 82 }; 83 84 /* 85 * Fast commit reason codes 86 */ 87 enum { 88 /* 89 * Commit status codes: 90 */ 91 EXT4_FC_REASON_OK = 0, 92 EXT4_FC_REASON_INELIGIBLE, 93 EXT4_FC_REASON_ALREADY_COMMITTED, 94 EXT4_FC_REASON_FC_START_FAILED, 95 EXT4_FC_REASON_FC_FAILED, 96 97 /* 98 * Fast commit ineligiblity reasons: 99 */ 100 EXT4_FC_REASON_XATTR = 0, 101 EXT4_FC_REASON_CROSS_RENAME, 102 EXT4_FC_REASON_JOURNAL_FLAG_CHANGE, 103 EXT4_FC_REASON_NOMEM, 104 EXT4_FC_REASON_SWAP_BOOT, 105 EXT4_FC_REASON_RESIZE, 106 EXT4_FC_REASON_RENAME_DIR, 107 EXT4_FC_REASON_FALLOC_RANGE, 108 EXT4_FC_COMMIT_FAILED, 109 EXT4_FC_REASON_MAX 110 }; 111 112 struct ext4_fc_stats { 113 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX]; 114 unsigned long fc_num_commits; 115 unsigned long fc_ineligible_commits; 116 unsigned long fc_numblks; 117 }; 118 119 #define EXT4_FC_REPLAY_REALLOC_INCREMENT 4 120 121 /* 122 * Physical block regions added to different inodes due to fast commit 123 * recovery. These are set during the SCAN phase. During the replay phase, 124 * our allocator excludes these from its allocation. This ensures that 125 * we don't accidentally allocating a block that is going to be used by 126 * another inode. 127 */ 128 struct ext4_fc_alloc_region { 129 ext4_lblk_t lblk; 130 ext4_fsblk_t pblk; 131 int ino, len; 132 }; 133 134 /* 135 * Fast commit replay state. 136 */ 137 struct ext4_fc_replay_state { 138 int fc_replay_num_tags; 139 int fc_replay_expected_off; 140 int fc_current_pass; 141 int fc_cur_tag; 142 int fc_crc; 143 struct ext4_fc_alloc_region *fc_regions; 144 int fc_regions_size, fc_regions_used, fc_regions_valid; 145 int *fc_modified_inodes; 146 int fc_modified_inodes_used, fc_modified_inodes_size; 147 }; 148 149 #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1) 150 151 #define fc_for_each_tl(__start, __end, __tl) \ 152 for (tl = (struct ext4_fc_tl *)start; \ 153 (u8 *)tl < (u8 *)end; \ 154 tl = (struct ext4_fc_tl *)((u8 *)tl + \ 155 sizeof(struct ext4_fc_tl) + \ 156 + le16_to_cpu(tl->fc_len))) 157 158 159 #endif /* __FAST_COMMIT_H__ */ 160