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bcachefs: logged ops only use inum 0 of logged ops btree

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we wish to use the logged ops btree for other items that aren't strictly
logged ops: cursors for inode allocation

There's no reason to create another cached btree for inode allocator
cursors - so reserve different parts of the keyspace for different
purposes.

Older versions will ignore or delete the cursors.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2024-12-01 21:35:11 -05:00
parent ad0b2544ec
commit f78760dede
2 changed files with 7 additions and 5 deletions
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10
fs/bcachefs/logged_ops.c
View File

@@ -63,8 +63,9 @@ static int resume_logged_op(struct btree_trans *trans, struct btree_iter *iter,
int bch2_resume_logged_ops(struct bch_fs *c)
{
int ret = bch2_trans_run(c,
for_each_btree_key(trans, iter,
BTREE_ID_logged_ops, POS_MIN,
for_each_btree_key_max(trans, iter,
BTREE_ID_logged_ops,
POS(LOGGED_OPS_INUM, 0), POS(LOGGED_OPS_INUM, U64_MAX),
BTREE_ITER_prefetch, k,
resume_logged_op(trans, &iter, k)));
bch_err_fn(c, ret);
@@ -74,9 +75,8 @@ int bch2_resume_logged_ops(struct bch_fs *c)
static int __bch2_logged_op_start(struct btree_trans *trans, struct bkey_i *k)
{
struct btree_iter iter;
int ret;
ret = bch2_bkey_get_empty_slot(trans, &iter, BTREE_ID_logged_ops, POS_MAX);
int ret = bch2_bkey_get_empty_slot(trans, &iter,
BTREE_ID_logged_ops, POS(LOGGED_OPS_INUM, U64_MAX));
if (ret)
return ret;

2
fs/bcachefs/logged_ops_format.h
View File

@@ -2,6 +2,8 @@
#ifndef _BCACHEFS_LOGGED_OPS_FORMAT_H
#define _BCACHEFS_LOGGED_OPS_FORMAT_H
#define LOGGED_OPS_INUM 0
struct bch_logged_op_truncate {
struct bch_val v;
__le32 subvol;