diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-05-25 23:37:06 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:10:02 -0400 |
| commit | fc0ee376bb5b08844198fba13fb809102afd0b29 (patch) | |
| tree | 30660fa3bae2e4b4fb72d7c835837d4f01800c55 /fs/bcachefs/reflink.c | |
| parent | db32bb9a5fd6bd7c7031b4b9d6c9a5e27b651e5d (diff) | |
bcachefs: Don't reuse reflink btree keyspace
We've been seeing difficult to debug "missing indirect extent" bugs,
that fsck doesn't seem to find.
One possibility is that there was a missing indirect extent, but then a
new indirect extent was created at the location of the previous indirect
extent.
This patch eliminates that possibility by always creating new indirect
extents right after the last one, at the end of the reflink btree.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/reflink.c')
| -rw-r--r-- | fs/bcachefs/reflink.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/fs/bcachefs/reflink.c b/fs/bcachefs/reflink.c index 9430899a5a31..26f0275ff0af 100644 --- a/fs/bcachefs/reflink.c +++ b/fs/bcachefs/reflink.c @@ -167,24 +167,13 @@ static int bch2_make_extent_indirect(struct btree_trans *trans, if (orig->k.type == KEY_TYPE_inline_data) bch2_check_set_feature(c, BCH_FEATURE_reflink_inline_data); - for_each_btree_key_norestart(trans, reflink_iter, BTREE_ID_reflink, - POS(0, c->reflink_hint), - BTREE_ITER_SLOTS, k, ret) { - if (reflink_iter.pos.inode) { - bch2_btree_iter_set_pos(&reflink_iter, POS_MIN); - continue; - } - - if (bkey_deleted(k.k) && orig->k.size <= k.k->size) - break; - } - + bch2_trans_iter_init(trans, &reflink_iter, BTREE_ID_reflink, POS_MAX, + BTREE_ITER_INTENT); + k = bch2_btree_iter_peek_prev(&reflink_iter); + ret = bkey_err(k); if (ret) goto err; - /* rewind iter to start of hole, if necessary: */ - bch2_btree_iter_set_pos_to_extent_start(&reflink_iter); - r_v = bch2_trans_kmalloc(trans, sizeof(__le64) + bkey_bytes(&orig->k)); ret = PTR_ERR_OR_ZERO(r_v); if (ret) @@ -226,7 +215,6 @@ static int bch2_make_extent_indirect(struct btree_trans *trans, ret = bch2_trans_update(trans, extent_iter, &r_p->k_i, BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE); err: - c->reflink_hint = reflink_iter.pos.offset; bch2_trans_iter_exit(trans, &reflink_iter); return ret; |