From: Filipe Manana fdmanana@suse.com
[ Upstream commit 1693d5442c458ae8d5b0d58463b873cd879569ed ]
Add a helper function to determine if a block group is being used and make use of it at btrfs_delete_unused_bgs(). This helper will also be used in future code changes.
Reviewed-by: Johannes Thumshirn johannes.thumshirn@wdc.com Reviewed-by: Josef Bacik josef@toxicpanda.com Reviewed-by: Boris Burkov boris@bur.io Signed-off-by: Filipe Manana fdmanana@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/btrfs/block-group.c | 3 +-- fs/btrfs/block-group.h | 7 +++++++ 2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 5a97db9888107..b152c1b1913fb 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1524,8 +1524,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info) }
spin_lock(&block_group->lock); - if (block_group->reserved || block_group->pinned || - block_group->used || block_group->ro || + if (btrfs_is_block_group_used(block_group) || block_group->ro || list_is_singular(&block_group->list)) { /* * We want to bail if we made new allocations or have diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h index 2bdbcb834f954..089979981e4aa 100644 --- a/fs/btrfs/block-group.h +++ b/fs/btrfs/block-group.h @@ -255,6 +255,13 @@ static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group) return (block_group->start + block_group->length); }
+static inline bool btrfs_is_block_group_used(const struct btrfs_block_group *bg) +{ + lockdep_assert_held(&bg->lock); + + return (bg->used > 0 || bg->reserved > 0 || bg->pinned > 0); +} + static inline bool btrfs_is_block_group_data_only( struct btrfs_block_group *block_group) {