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| author | Filipe Manana <fdmanana@suse.com> | 2020-04-17 18:36:50 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-05-25 12:25:24 +0300 |
| commit | 534cf531ccf6331b6e63a054f2ceb8e1ccff1ec9 (patch) | |
| tree | dadd308b1cbd00c7d4c3cfea27845330a3f4e04b /fs/btrfs/block-group.c | |
| parent | e3b8336117e515a260da32fa10bb3354ba12c429 (diff) | |
| download | linux-534cf531ccf6331b6e63a054f2ceb8e1ccff1ec9.tar.xz | |
btrfs: simplify error handling of clean_pinned_extents()
At clean_pinned_extents(), whether we end up returning success or failure,
we pretty much have to do the same things:
1) unlock unused_bg_unpin_mutex
2) decrement reference count on the previous transaction
We also call btrfs_dec_block_group_ro() in case of failure, but that is
better done in its caller, btrfs_delete_unused_bgs(), since its the
caller that calls inc_block_group_ro(), so it should be responsible for
the decrement operation, as it is in case any of the other functions it
calls fail.
So move the call to btrfs_dec_block_group_ro() from clean_pinned_extents()
into btrfs_delete_unused_bgs() and unify the error and success return
paths for clean_pinned_extents(), reducing duplicated code and making it
simpler.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/block-group.c')
| -rw-r--r-- | fs/btrfs/block-group.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 233c5663f233..5627f53ca115 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1284,25 +1284,17 @@ static bool clean_pinned_extents(struct btrfs_trans_handle *trans, ret = clear_extent_bits(&prev_trans->pinned_extents, start, end, EXTENT_DIRTY); if (ret) - goto err; + goto out; } ret = clear_extent_bits(&trans->transaction->pinned_extents, start, end, EXTENT_DIRTY); - if (ret) - goto err; +out: mutex_unlock(&fs_info->unused_bg_unpin_mutex); if (prev_trans) btrfs_put_transaction(prev_trans); - return true; - -err: - mutex_unlock(&fs_info->unused_bg_unpin_mutex); - if (prev_trans) - btrfs_put_transaction(prev_trans); - btrfs_dec_block_group_ro(bg); - return false; + return ret == 0; } /* @@ -1400,8 +1392,10 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info) * We could have pending pinned extents for this block group, * just delete them, we don't care about them anymore. */ - if (!clean_pinned_extents(trans, block_group)) + if (!clean_pinned_extents(trans, block_group)) { + btrfs_dec_block_group_ro(block_group); goto end_trans; + } /* * At this point, the block_group is read only and should fail |