diff options
Diffstat (limited to 'libbcachefs/bcachefs_format.h')
| -rw-r--r-- | libbcachefs/bcachefs_format.h | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/libbcachefs/bcachefs_format.h b/libbcachefs/bcachefs_format.h index 7d1c0b1e..4d142b2e 100644 --- a/libbcachefs/bcachefs_format.h +++ b/libbcachefs/bcachefs_format.h @@ -250,6 +250,11 @@ struct bkey_packed { __u8 pad[sizeof(struct bkey) - 3]; } __packed __aligned(8); +typedef struct { + __le64 lo; + __le64 hi; +} bch_le128; + #define BKEY_U64s (sizeof(struct bkey) / sizeof(__u64)) #define BKEY_U64s_MAX U8_MAX #define BKEY_VAL_U64s_MAX (BKEY_U64s_MAX - BKEY_U64s) @@ -360,7 +365,8 @@ static inline void bkey_init(struct bkey *k) x(alloc_v4, 27) \ x(backpointer, 28) \ x(inode_v3, 29) \ - x(bucket_gens, 30) + x(bucket_gens, 30) \ + x(snapshot_tree, 31) enum bch_bkey_type { #define x(name, nr) KEY_TYPE_##name = nr, @@ -1101,6 +1107,9 @@ struct bch_subvolume { __le32 flags; __le32 snapshot; __le64 inode; + __le32 parent; + __le32 pad; + bch_le128 otime; }; LE32_BITMASK(BCH_SUBVOLUME_RO, struct bch_subvolume, flags, 0, 1) @@ -1119,7 +1128,7 @@ struct bch_snapshot { __le32 parent; __le32 children[2]; __le32 subvol; - __le32 pad; + __le32 tree; }; LE32_BITMASK(BCH_SNAPSHOT_DELETED, struct bch_snapshot, flags, 0, 1) @@ -1127,6 +1136,19 @@ LE32_BITMASK(BCH_SNAPSHOT_DELETED, struct bch_snapshot, flags, 0, 1) /* True if a subvolume points to this snapshot node: */ LE32_BITMASK(BCH_SNAPSHOT_SUBVOL, struct bch_snapshot, flags, 1, 2) +/* + * Snapshot trees: + * + * The snapshot_trees btree gives us persistent indentifier for each tree of + * bch_snapshot nodes, and allow us to record and easily find the root/master + * subvolume that other snapshots were created from: + */ +struct bch_snapshot_tree { + struct bch_val v; + __le32 master_subvol; + __le32 root_snapshot; +}; + /* LRU btree: */ struct bch_lru { @@ -1555,7 +1577,8 @@ struct bch_sb_field_journal_seq_blacklist { x(bucket_gens, 25) \ x(lru_v2, 26) \ x(fragmentation_lru, 27) \ - x(no_bps_in_alloc_keys, 28) + x(no_bps_in_alloc_keys, 28) \ + x(snapshot_trees, 29) enum bcachefs_metadata_version { bcachefs_metadata_version_min = 9, @@ -1565,6 +1588,8 @@ enum bcachefs_metadata_version { bcachefs_metadata_version_max }; +static const unsigned bcachefs_metadata_required_upgrade_below = bcachefs_metadata_version_snapshot_trees; + #define bcachefs_metadata_version_current (bcachefs_metadata_version_max - 1) #define BCH_SB_SECTOR 8 @@ -2091,7 +2116,8 @@ LE32_BITMASK(JSET_NO_FLUSH, struct jset, flags, 5, 6); x(freespace, 11) \ x(need_discard, 12) \ x(backpointers, 13) \ - x(bucket_gens, 14) + x(bucket_gens, 14) \ + x(snapshot_trees, 15) enum btree_id { #define x(kwd, val) BTREE_ID_##kwd = val, |