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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-28 22:09:13 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:10:05 -0400 |
| commit | faa6cb6c13c7223240366ebbf0217a6191fbfc32 (patch) | |
| tree | c41d92045b9cdd9f84c1f0188ab4d7311796c2bc /fs/bcachefs/move.c | |
| parent | bc652905c60b504ded266448b2810242d24c8d88 (diff) | |
| download | linux-stable-faa6cb6c13c7223240366ebbf0217a6191fbfc32.tar.gz linux-stable-faa6cb6c13c7223240366ebbf0217a6191fbfc32.tar.bz2 linux-stable-faa6cb6c13c7223240366ebbf0217a6191fbfc32.zip | |
bcachefs: Allow for unknown btree IDs
We need to allow filesystems with metadata from newer versions to be
mountable and usable by older versions.
This patch enables us to roll out new btrees without a new major version
number; we can now handle btree roots for unknown btree types.
The unknown btree roots will be retained, and fsck (including
backpointers) will check them, the same as other btree types.
We add a dynamic array for the extra, unknown btree roots, in addition
to the fixed size btree root array, and add new helpers for looking up
btree roots.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/move.c')
| -rw-r--r-- | fs/bcachefs/move.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c index 37fb3784a2f9..05272673901d 100644 --- a/fs/bcachefs/move.c +++ b/fs/bcachefs/move.c @@ -632,7 +632,7 @@ int bch2_move_data(struct bch_fs *c, bch2_moving_ctxt_init(&ctxt, c, rate, stats, wp, wait_on_copygc); for (id = start_btree_id; - id <= min_t(unsigned, end_btree_id, BTREE_ID_NR - 1); + id <= min_t(unsigned, end_btree_id, btree_id_nr_alive(c) - 1); id++) { stats->btree_id = id; @@ -640,6 +640,9 @@ int bch2_move_data(struct bch_fs *c, id != BTREE_ID_reflink) continue; + if (!bch2_btree_id_root(c, id)->b) + continue; + ret = __bch2_move_data(&ctxt, id == start_btree_id ? start_pos : POS_MIN, id == end_btree_id ? end_pos : POS_MAX, @@ -861,10 +864,13 @@ static int bch2_move_btree(struct bch_fs *c, stats->data_type = BCH_DATA_btree; for (id = start_btree_id; - id <= min_t(unsigned, end_btree_id, BTREE_ID_NR - 1); + id <= min_t(unsigned, end_btree_id, btree_id_nr_alive(c) - 1); id++) { stats->btree_id = id; + if (!bch2_btree_id_root(c, id)->b) + continue; + bch2_trans_node_iter_init(&trans, &iter, id, POS_MIN, 0, 0, BTREE_ITER_PREFETCH); retry: |