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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2022-11-26 05:14:30 +0100 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 23:09:51 +0200 |
| commit | 5250b74d55e16246a47bdcf1182b7469e28e0652 (patch) | |
| tree | b7f758f4e3a40f27caf1e1bee89eedd3df5f5924 /fs/bcachefs/bcachefs_format.h | |
| parent | bcachefs: Inline bch2_two_state_(trylock|unlock) (diff) | |
| download | linux-5250b74d55e16246a47bdcf1182b7469e28e0652.tar.xz linux-5250b74d55e16246a47bdcf1182b7469e28e0652.zip | |
bcachefs: bucket_gens btree
To improve mount times, add a btree for just bucket gens, 256 of them
per key: this means we'll have to scan drastically less metadata at
startup.
This adds
- trigger for keeping it in sync with the all btree
- initialization code, for filesystems from previous versions
- new path for reading bucket gens
- new fsck code
And a new on disk format version.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/bcachefs_format.h')
| -rw-r--r-- | fs/bcachefs/bcachefs_format.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/fs/bcachefs/bcachefs_format.h b/fs/bcachefs/bcachefs_format.h index 024a714955f2..7e67d2e94a29 100644 --- a/fs/bcachefs/bcachefs_format.h +++ b/fs/bcachefs/bcachefs_format.h @@ -371,7 +371,8 @@ static inline void bkey_init(struct bkey *k) x(lru, 26) \ x(alloc_v4, 27) \ x(backpointer, 28) \ - x(inode_v3, 29) + x(inode_v3, 29) \ + x(bucket_gens, 30) enum bch_bkey_type { #define x(name, nr) KEY_TYPE_##name = nr, @@ -1013,6 +1014,15 @@ struct bch_backpointer { struct bpos pos; } __packed __aligned(8); +#define KEY_TYPE_BUCKET_GENS_BITS 8 +#define KEY_TYPE_BUCKET_GENS_NR (1U << KEY_TYPE_BUCKET_GENS_BITS) +#define KEY_TYPE_BUCKET_GENS_MASK (KEY_TYPE_BUCKET_GENS_NR - 1) + +struct bch_bucket_gens { + struct bch_val v; + u8 gens[KEY_TYPE_BUCKET_GENS_NR]; +} __packed __aligned(8); + /* Quotas: */ enum quota_types { @@ -1551,7 +1561,8 @@ struct bch_sb_field_journal_seq_blacklist { x(new_data_types, 21) \ x(backpointers, 22) \ x(inode_v3, 23) \ - x(unwritten_extents, 24) + x(unwritten_extents, 24) \ + x(bucket_gens, 25) enum bcachefs_metadata_version { bcachefs_metadata_version_min = 9, @@ -2086,7 +2097,8 @@ LE32_BITMASK(JSET_NO_FLUSH, struct jset, flags, 5, 6); x(lru, 10) \ x(freespace, 11) \ x(need_discard, 12) \ - x(backpointers, 13) + x(backpointers, 13) \ + x(bucket_gens, 14) enum btree_id { #define x(kwd, val) BTREE_ID_##kwd = val, |