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bcachefs: for_each_btree_key_in_subvolume_upto()

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New helper for looping over keys in a given subvolume

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2024-07-17 12:59:51 -04:00
parent 1a3158ece5
commit 0215b91804
1 changed files with 45 additions and 0 deletions
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45
fs/bcachefs/subvolume.h
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@@ -31,6 +31,51 @@ int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
int bch2_subvol_is_ro(struct bch_fs *, u32);
static inline struct bkey_s_c
bch2_btree_iter_peek_in_subvolume_upto_type(struct btree_iter *iter, struct bpos end,
u32 subvolid, unsigned flags)
{
u32 snapshot;
int ret = bch2_subvolume_get_snapshot(iter->trans, subvolid, &snapshot);
if (ret)
return bkey_s_c_err(ret);
bch2_btree_iter_set_snapshot(iter, snapshot);
return bch2_btree_iter_peek_upto_type(iter, end, flags);
}
#define for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
_end, _subvolid, _flags, _k, _do) \
({ \
struct bkey_s_c _k; \
int _ret3 = 0; \
\
do { \
_ret3 = lockrestart_do(_trans, ({ \
(_k) = bch2_btree_iter_peek_in_subvolume_upto_type(&(_iter), \
_end, _subvolid, (_flags)); \
if (!(_k).k) \
break; \
\
bkey_err(_k) ?: (_do); \
})); \
} while (!_ret3 && bch2_btree_iter_advance(&(_iter))); \
\
bch2_trans_iter_exit((_trans), &(_iter)); \
_ret3; \
})
#define for_each_btree_key_in_subvolume_upto(_trans, _iter, _btree_id, \
_start, _end, _subvolid, _flags, _k, _do) \
({ \
struct btree_iter _iter; \
bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
(_start), (_flags)); \
\
for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
_end, _subvolid, _flags, _k, _do); \
})
int bch2_delete_dead_snapshots(struct bch_fs *);
void bch2_delete_dead_snapshots_async(struct bch_fs *);