fs/bcachefs/inode_format.h

   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 */