Introduce a small helper, btrfs_mark_bg_unused(), to accquire needed locks and add a block group to unused_bgs list.
No functional modification, and only 3 callers are involved. Signed-off-by: Qu Wenruo <w...@suse.com> --- fs/btrfs/ctree.h | 1 + fs/btrfs/extent-tree.c | 36 +++++++++++++++++------------------- fs/btrfs/scrub.c | 9 +-------- 3 files changed, 19 insertions(+), 27 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2771cc56a622..b19b673485fd 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2829,6 +2829,7 @@ void check_system_chunk(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, const u64 type); u64 add_new_free_space(struct btrfs_block_group_cache *block_group, struct btrfs_fs_info *info, u64 start, u64 end); +void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); /* ctree.c */ int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 8241de81089a..f0d7e19feca7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6350,16 +6350,8 @@ static int update_block_group(struct btrfs_trans_handle *trans, * dirty list to avoid races between cleaner kthread and space * cache writeout. */ - if (!alloc && old_val == 0) { - spin_lock(&info->unused_bgs_lock); - if (list_empty(&cache->bg_list)) { - btrfs_get_block_group(cache); - trace_btrfs_add_unused_block_group(cache); - list_add_tail(&cache->bg_list, - &info->unused_bgs); - } - spin_unlock(&info->unused_bgs_lock); - } + if (!alloc && old_val == 0) + btrfs_mark_bg_unused(cache); btrfs_put_block_group(cache); total -= num_bytes; @@ -10201,15 +10193,8 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info) if (btrfs_chunk_readonly(info, cache->key.objectid)) { inc_block_group_ro(cache, 1); } else if (btrfs_block_group_used(&cache->item) == 0) { - spin_lock(&info->unused_bgs_lock); - /* Should always be true but just in case. */ - if (list_empty(&cache->bg_list)) { - btrfs_get_block_group(cache); - trace_btrfs_add_unused_block_group(cache); - list_add_tail(&cache->bg_list, - &info->unused_bgs); - } - spin_unlock(&info->unused_bgs_lock); + ASSERT(list_empty(&cache->bg_list)); + btrfs_mark_bg_unused(cache); } } @@ -11133,3 +11118,16 @@ void btrfs_wait_for_snapshot_creation(struct btrfs_root *root) !atomic_read(&root->will_be_snapshotted)); } } + +void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg) +{ + struct btrfs_fs_info *fs_info = bg->fs_info; + + spin_lock(&fs_info->unused_bgs_lock); + if (list_empty(&bg->bg_list)) { + btrfs_get_block_group(bg); + trace_btrfs_add_unused_block_group(bg); + list_add_tail(&bg->bg_list, &fs_info->unused_bgs); + } + spin_unlock(&fs_info->unused_bgs_lock); +} diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index a59005862010..40086b47a65f 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -3981,14 +3981,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, if (!cache->removed && !cache->ro && cache->reserved == 0 && btrfs_block_group_used(&cache->item) == 0) { spin_unlock(&cache->lock); - spin_lock(&fs_info->unused_bgs_lock); - if (list_empty(&cache->bg_list)) { - btrfs_get_block_group(cache); - trace_btrfs_add_unused_block_group(cache); - list_add_tail(&cache->bg_list, - &fs_info->unused_bgs); - } - spin_unlock(&fs_info->unused_bgs_lock); + btrfs_mark_bg_unused(cache); } else { spin_unlock(&cache->lock); } -- 2.17.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html