This is a note to let you know that I've just added the patch titled
btrfs: convert btrfs_block_group::needs_free_space to runtime flag
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-convert-btrfs_block_group-needs_free_space-to-.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ba850e9cb9bc23dbd320aae9af13b35a25e9ad44
Author: David Sterba <dsterba@xxxxxxxx>
Date: Mon Oct 31 20:33:44 2022 +0100
btrfs: convert btrfs_block_group::needs_free_space to runtime flag
[ Upstream commit 0d7764ff58b4b45c39eb03f2c74a819c1a88fa7b ]
We already have flags in block group to track various status bits,
convert needs_free_space as well and reduce size of btrfs_block_group.
Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Stable-dep-of: 0657b20c5a76 ("btrfs: fix use-after-free of new block group that became unused")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 9f5a971bfed42..a726b532b5277 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -2543,7 +2543,7 @@ struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *tran
cache->global_root_id = calculate_global_root_id(fs_info, cache->start);
if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
- cache->needs_free_space = 1;
+ set_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &cache->runtime_flags);
ret = btrfs_load_block_group_zone_info(cache, true);
if (ret) {
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h
index debd42aeae0f1..dcad5e959b920 100644
--- a/fs/btrfs/block-group.h
+++ b/fs/btrfs/block-group.h
@@ -55,6 +55,8 @@ enum btrfs_block_group_flags {
BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
+ /* Does the block group need to be added to the free space tree? */
+ BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
};
enum btrfs_caching_type {
@@ -204,12 +206,6 @@ struct btrfs_block_group {
/* Lock for free space tree operations. */
struct mutex free_space_lock;
- /*
- * Does the block group need to be added to the free space tree?
- * Protected by free_space_lock.
- */
- int needs_free_space;
-
/* Flag indicating this block group is placed on a sequential zone */
bool seq_zone;
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index a207db9322264..6a44733a95e1c 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -803,7 +803,7 @@ int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
u32 flags;
int ret;
- if (block_group->needs_free_space) {
+ if (test_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &block_group->runtime_flags)) {
ret = __add_block_group_free_space(trans, block_group, path);
if (ret)
return ret;
@@ -996,7 +996,7 @@ int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
u32 flags;
int ret;
- if (block_group->needs_free_space) {
+ if (test_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &block_group->runtime_flags)) {
ret = __add_block_group_free_space(trans, block_group, path);
if (ret)
return ret;
@@ -1350,7 +1350,7 @@ static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
{
int ret;
- block_group->needs_free_space = 0;
+ clear_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &block_group->runtime_flags);
ret = add_new_free_space_info(trans, block_group, path);
if (ret)
@@ -1372,7 +1372,7 @@ int add_block_group_free_space(struct btrfs_trans_handle *trans,
return 0;
mutex_lock(&block_group->free_space_lock);
- if (!block_group->needs_free_space)
+ if (!test_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &block_group->runtime_flags))
goto out;
path = btrfs_alloc_path();
@@ -1405,7 +1405,7 @@ int remove_block_group_free_space(struct btrfs_trans_handle *trans,
if (!btrfs_fs_compat_ro(trans->fs_info, FREE_SPACE_TREE))
return 0;
- if (block_group->needs_free_space) {
+ if (test_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &block_group->runtime_flags)) {
/* We never added this block group to the free space tree. */
return 0;
}
diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c
index 13734ed43bfcb..766117a76d742 100644
--- a/fs/btrfs/tests/free-space-tree-tests.c
+++ b/fs/btrfs/tests/free-space-tree-tests.c
@@ -470,7 +470,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
}
cache->bitmap_low_thresh = 0;
cache->bitmap_high_thresh = (u32)-1;
- cache->needs_free_space = 1;
+ set_bit(BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE, &cache->runtime_flags);
cache->fs_info = root->fs_info;
btrfs_init_dummy_trans(&trans, root->fs_info);
