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btrfs: cleanup the target logic in __btrfs_block_rsv_release

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This works for all callers already, but if we wanted to use the helper
for the global_block_rsv it would end up trying to refill itself.  Fix
the logic to be able to be used no matter which block rsv is passed in
to this helper.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2019-06-19 13:47:20 -04:00 committed by David Sterba
parent fed14b323d
commit fcec36224f
1 changed files with 9 additions and 3 deletions
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12
fs/btrfs/extent-tree.c
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@ -4680,12 +4680,18 @@ u64 __btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
{
struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
struct btrfs_block_rsv *delayed_rsv = &fs_info->delayed_refs_rsv;
struct btrfs_block_rsv *target = delayed_rsv;
struct btrfs_block_rsv *target = NULL;
if (target->full || target == block_rsv)
/*
* If we are the delayed_rsv then push to the global rsv, otherwise dump
* into the delayed rsv if it is not full.
*/
if (block_rsv == delayed_rsv)
target = global_rsv;
else if (block_rsv != global_rsv && !delayed_rsv->full)
target = delayed_rsv;
if (block_rsv->space_info != target->space_info)
if (target && block_rsv->space_info != target->space_info)
target = NULL;
return block_rsv_release_bytes(fs_info, block_rsv, target, num_bytes,