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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-04-30 02:33:09 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:10:00 +0300 |
| commit | bcb79a51cb52033bb12c5ed2eb46770e984b5542 (patch) | |
| tree | 9474d9d274906a44a8a49fba8cd4bb74144e6c64 /fs/bcachefs/backpointers.c | |
| parent | 174f930b8e1cad3915819a46bb20da214f68f2b5 (diff) | |
| download | linux-bcb79a51cb52033bb12c5ed2eb46770e984b5542.tar.xz | |
bcachefs: bch2_bkey_get_iter() helpers
Introduce new helpers for a common pattern:
bch2_trans_iter_init();
bch2_btree_iter_peek_slot();
- bch2_bkey_get_iter_type() returns -ENOENT if it doesn't find a key of
the correct type
- bch2_bkey_get_val_typed() copies the val out of the btree to a
(typically stack allocated) variable; it handles the case where the
value in the btree is smaller than the current version of the type,
zeroing out the remainder.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/backpointers.c')
| -rw-r--r-- | fs/bcachefs/backpointers.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/fs/bcachefs/backpointers.c b/fs/bcachefs/backpointers.c index e8666c3ed465..e9ae623cf4a8 100644 --- a/fs/bcachefs/backpointers.c +++ b/fs/bcachefs/backpointers.c @@ -158,12 +158,11 @@ int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *trans, set_bkey_val_u64s(&bp_k->k, 0); } - bch2_trans_iter_init(trans, &bp_iter, BTREE_ID_backpointers, - bp_k->k.p, - BTREE_ITER_INTENT| - BTREE_ITER_SLOTS| - BTREE_ITER_WITH_UPDATES); - k = bch2_btree_iter_peek_slot(&bp_iter); + k = bch2_bkey_get_iter(trans, &bp_iter, BTREE_ID_backpointers, + bp_k->k.p, + BTREE_ITER_INTENT| + BTREE_ITER_SLOTS| + BTREE_ITER_WITH_UPDATES); ret = bkey_err(k); if (ret) goto err; @@ -202,9 +201,8 @@ int bch2_get_next_backpointer(struct btree_trans *trans, goto done; if (gen >= 0) { - bch2_trans_iter_init(trans, &alloc_iter, BTREE_ID_alloc, - bucket, BTREE_ITER_CACHED|iter_flags); - k = bch2_btree_iter_peek_slot(&alloc_iter); + k = bch2_bkey_get_iter(trans, &alloc_iter, BTREE_ID_alloc, + bucket, BTREE_ITER_CACHED|iter_flags); ret = bkey_err(k); if (ret) goto out; @@ -381,10 +379,8 @@ static int bch2_check_btree_backpointer(struct btree_trans *trans, struct btree_ ca = bch_dev_bkey_exists(c, k.k->p.inode); - bch2_trans_iter_init(trans, &alloc_iter, BTREE_ID_alloc, - bp_pos_to_bucket(c, k.k->p), 0); - - alloc_k = bch2_btree_iter_peek_slot(&alloc_iter); + alloc_k = bch2_bkey_get_iter(trans, &alloc_iter, BTREE_ID_alloc, + bp_pos_to_bucket(c, k.k->p), 0); ret = bkey_err(alloc_k); if (ret) goto out; @@ -442,10 +438,9 @@ static int check_bp_exists(struct btree_trans *trans, if (!bch2_dev_bucket_exists(c, bucket)) goto missing; - bch2_trans_iter_init(trans, &bp_iter, BTREE_ID_backpointers, - bucket_pos_to_bp(c, bucket, bp.bucket_offset), - 0); - bp_k = bch2_btree_iter_peek_slot(&bp_iter); + bp_k = bch2_bkey_get_iter(trans, &bp_iter, BTREE_ID_backpointers, + bucket_pos_to_bp(c, bucket, bp.bucket_offset), + 0); ret = bkey_err(bp_k); if (ret) goto err; |