1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __FAST_COMMIT_H__ 4 #define __FAST_COMMIT_H__ 5 6 /* Fast commit tags */ 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 16 17 #define EXT4_FC_SUPPORTED_FEATURES 0x0 18 19 /* On disk fast commit tlv value structures */ 20 21 /* Fast commit on disk tag length structure */ 22 struct ext4_fc_tl { 23 __le16 fc_tag; 24 __le16 fc_len; 25 }; 26 27 /* Value structure for tag EXT4_FC_TAG_HEAD. */ 28 struct ext4_fc_head { 29 __le32 fc_features; 30 __le32 fc_tid; 31 }; 32 33 /* Value structure for EXT4_FC_TAG_ADD_RANGE. */ 34 struct ext4_fc_add_range { 35 __le32 fc_ino; 36 __u8 fc_ex[12]; 37 }; 38 39 /* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */ 40 struct ext4_fc_del_range { 41 __le32 fc_ino; 42 __le32 fc_lblk; 43 __le32 fc_len; 44 }; 45 46 /* 47 * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK 48 * and EXT4_FC_TAG_UNLINK. 49 */ 50 struct ext4_fc_dentry_info { 51 __le32 fc_parent_ino; 52 __le32 fc_ino; 53 u8 fc_dname[0]; 54 }; 55 56 /* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */ 57 struct ext4_fc_inode { 58 __le32 fc_ino; 59 __u8 fc_raw_inode[0]; 60 }; 61 62 /* Value structure for tag EXT4_FC_TAG_TAIL. */ 63 struct ext4_fc_tail { 64 __le32 fc_tid; 65 __le32 fc_crc; 66 }; 67 68 /* 69 * In memory list of dentry updates that are performed on the file 70 * system used by fast commit code. 71 */ 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; 79 }; 80 81 /* 82 * Fast commit reason codes 83 */ 84 enum { 85 /* 86 * Commit status codes: 87 */ 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, 93 94 /* 95 * Fast commit ineligiblity reasons: 96 */ 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_REASON_INODE_JOURNAL_DATA, 106 EXT4_FC_COMMIT_FAILED, 107 EXT4_FC_REASON_ENCRYPTED_FILENAME, 108 EXT4_FC_REASON_MAX 109 }; 110 111 struct ext4_fc_stats { 112 unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX]; 113 unsigned long fc_num_commits; 114 unsigned long fc_ineligible_commits; 115 unsigned long fc_numblks; 116 }; 117 118 #define EXT4_FC_REPLAY_REALLOC_INCREMENT 4 119 120 /* 121 * Physical block regions added to different inodes due to fast commit 122 * recovery. These are set during the SCAN phase. During the replay phase, 123 * our allocator excludes these from its allocation. This ensures that 124 * we don't accidentally allocating a block that is going to be used by 125 * another inode. 126 */ 127 struct ext4_fc_alloc_region { 128 ext4_lblk_t lblk; 129 ext4_fsblk_t pblk; 130 int ino, len; 131 }; 132 133 /* 134 * Fast commit replay state. 135 */ 136 struct ext4_fc_replay_state { 137 int fc_replay_num_tags; 138 int fc_replay_expected_off; 139 int fc_current_pass; 140 int fc_cur_tag; 141 int fc_crc; 142 struct ext4_fc_alloc_region *fc_regions; 143 int fc_regions_size, fc_regions_used, fc_regions_valid; 144 int *fc_modified_inodes; 145 int fc_modified_inodes_used, fc_modified_inodes_size; 146 }; 147 148 #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1) 149 150 151 #endif /* __FAST_COMMIT_H__ */ 152