1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_INODE_FORMAT_H 3 #define _BCACHEFS_INODE_FORMAT_H 4 5 #define BLOCKDEV_INODE_MAX 4096 6 #define BCACHEFS_ROOT_INO 4096 7 8 struct bch_inode { 9 struct bch_val v; 10 11 __le64 bi_hash_seed; 12 __le32 bi_flags; 13 __le16 bi_mode; 14 __u8 fields[]; 15 } __packed __aligned(8); 16 17 struct bch_inode_v2 { 18 struct bch_val v; 19 20 __le64 bi_journal_seq; 21 __le64 bi_hash_seed; 22 __le64 bi_flags; 23 __le16 bi_mode; 24 __u8 fields[]; 25 } __packed __aligned(8); 26 27 struct bch_inode_v3 { 28 struct bch_val v; 29 30 __le64 bi_journal_seq; 31 __le64 bi_hash_seed; 32 __le64 bi_flags; 33 __le64 bi_sectors; 34 __le64 bi_size; 35 __le64 bi_version; 36 __u8 fields[]; 37 } __packed __aligned(8); 38 39 #define INODEv3_FIELDS_START_INITIAL 6 40 #define INODEv3_FIELDS_START_CUR (offsetof(struct bch_inode_v3, fields) / sizeof(__u64)) 41 42 struct bch_inode_generation { 43 struct bch_val v; 44 45 __le32 bi_generation; 46 __le32 pad; 47 } __packed __aligned(8); 48 49 /* 50 * bi_subvol and bi_parent_subvol are only set for subvolume roots: 51 */ 52 53 #define BCH_INODE_FIELDS_v2() \ 54 x(bi_atime, 96) \ 55 x(bi_ctime, 96) \ 56 x(bi_mtime, 96) \ 57 x(bi_otime, 96) \ 58 x(bi_size, 64) \ 59 x(bi_sectors, 64) \ 60 x(bi_uid, 32) \ 61 x(bi_gid, 32) \ 62 x(bi_nlink, 32) \ 63 x(bi_generation, 32) \ 64 x(bi_dev, 32) \ 65 x(bi_data_checksum, 8) \ 66 x(bi_compression, 8) \ 67 x(bi_project, 32) \ 68 x(bi_background_compression, 8) \ 69 x(bi_data_replicas, 8) \ 70 x(bi_promote_target, 16) \ 71 x(bi_foreground_target, 16) \ 72 x(bi_background_target, 16) \ 73 x(bi_erasure_code, 16) \ 74 x(bi_fields_set, 16) \ 75 x(bi_dir, 64) \ 76 x(bi_dir_offset, 64) \ 77 x(bi_subvol, 32) \ 78 x(bi_parent_subvol, 32) 79 80 #define BCH_INODE_FIELDS_v3() \ 81 x(bi_atime, 96) \ 82 x(bi_ctime, 96) \ 83 x(bi_mtime, 96) \ 84 x(bi_otime, 96) \ 85 x(bi_uid, 32) \ 86 x(bi_gid, 32) \ 87 x(bi_nlink, 32) \ 88 x(bi_generation, 32) \ 89 x(bi_dev, 32) \ 90 x(bi_data_checksum, 8) \ 91 x(bi_compression, 8) \ 92 x(bi_project, 32) \ 93 x(bi_background_compression, 8) \ 94 x(bi_data_replicas, 8) \ 95 x(bi_promote_target, 16) \ 96 x(bi_foreground_target, 16) \ 97 x(bi_background_target, 16) \ 98 x(bi_erasure_code, 16) \ 99 x(bi_fields_set, 16) \ 100 x(bi_dir, 64) \ 101 x(bi_dir_offset, 64) \ 102 x(bi_subvol, 32) \ 103 x(bi_parent_subvol, 32) \ 104 x(bi_nocow, 8) 105 106 /* subset of BCH_INODE_FIELDS */ 107 #define BCH_INODE_OPTS() \ 108 x(data_checksum, 8) \ 109 x(compression, 8) \ 110 x(project, 32) \ 111 x(background_compression, 8) \ 112 x(data_replicas, 8) \ 113 x(promote_target, 16) \ 114 x(foreground_target, 16) \ 115 x(background_target, 16) \ 116 x(erasure_code, 16) \ 117 x(nocow, 8) 118 119 enum inode_opt_id { 120 #define x(name, ...) \ 121 Inode_opt_##name, 122 BCH_INODE_OPTS() 123 #undef x 124 Inode_opt_nr, 125 }; 126 127 #define BCH_INODE_FLAGS() \ 128 x(sync, 0) \ 129 x(immutable, 1) \ 130 x(append, 2) \ 131 x(nodump, 3) \ 132 x(noatime, 4) \ 133 x(i_size_dirty, 5) \ 134 x(i_sectors_dirty, 6) \ 135 x(unlinked, 7) \ 136 x(backptr_untrusted, 8) 137 138 /* bits 20+ reserved for packed fields below: */ 139 140 enum bch_inode_flags { 141 #define x(t, n) BCH_INODE_##t = 1U << n, 142 BCH_INODE_FLAGS() 143 #undef x 144 }; 145 146 enum __bch_inode_flags { 147 #define x(t, n) __BCH_INODE_##t = n, 148 BCH_INODE_FLAGS() 149 #undef x 150 }; 151 152 LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24); 153 LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 31); 154 LE32_BITMASK(INODE_NEW_VARINT, struct bch_inode, bi_flags, 31, 32); 155 156 LE64_BITMASK(INODEv2_STR_HASH, struct bch_inode_v2, bi_flags, 20, 24); 157 LE64_BITMASK(INODEv2_NR_FIELDS, struct bch_inode_v2, bi_flags, 24, 31); 158 159 LE64_BITMASK(INODEv3_STR_HASH, struct bch_inode_v3, bi_flags, 20, 24); 160 LE64_BITMASK(INODEv3_NR_FIELDS, struct bch_inode_v3, bi_flags, 24, 31); 161 162 LE64_BITMASK(INODEv3_FIELDS_START, 163 struct bch_inode_v3, bi_flags, 31, 36); 164 LE64_BITMASK(INODEv3_MODE, struct bch_inode_v3, bi_flags, 36, 52); 165 166 #endif /* _BCACHEFS_INODE_FORMAT_H */ 167