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btrfs: introduce tree-log sub-space_info

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Introduce the tree-log sub-space_info, which is sub-space of
metadata space_info and dedicated for tree-log node allocation.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2025-04-23 11:43:49 +09:00 • committed by David Sterba
parent f92ee31e03
commit 9a3023b828
3 changed files with 15 additions and 2 deletions
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5
fs/btrfs/space-info.c
View file

@ -299,6 +299,11 @@ static int create_space_info(struct btrfs_fs_info *info, u64 flags)
ret = create_space_info_sub_group(space_info, flags,
BTRFS_SUB_GROUP_DATA_RELOC,
0);
else if (flags & BTRFS_BLOCK_GROUP_METADATA)
ret = create_space_info_sub_group(space_info, flags,
BTRFS_SUB_GROUP_TREELOG,
0);
if (ret)
return ret;
}

1
fs/btrfs/space-info.h
View file

@ -101,6 +101,7 @@ enum btrfs_flush_state {
enum btrfs_space_info_sub_group {
BTRFS_SUB_GROUP_PRIMARY,
BTRFS_SUB_GROUP_DATA_RELOC,
BTRFS_SUB_GROUP_TREELOG,
};
#define BTRFS_SPACE_INFO_SUB_GROUP_MAX 1

11
fs/btrfs/sysfs.c
View file

@ -1938,8 +1938,15 @@ static const char *alloc_name(struct btrfs_space_info *space_info)
case BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA:
return "mixed";
case BTRFS_BLOCK_GROUP_METADATA:
ASSERT(space_info->subgroup_id == BTRFS_SUB_GROUP_PRIMARY);
return "metadata";
switch (space_info->subgroup_id) {
case BTRFS_SUB_GROUP_PRIMARY:
return "metadata";
case BTRFS_SUB_GROUP_TREELOG:
return "metadata-treelog";
default:
WARN_ON_ONCE(1);
return "metadata (unknown sub-group)";
}
case BTRFS_BLOCK_GROUP_DATA:
switch (space_info->subgroup_id) {
case BTRFS_SUB_GROUP_PRIMARY: