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btrfs: check quota status earlier and don't do unnecessary frees 

Status of quotas should be the first check in
btrfs_qgroup_account_extent and we can return immediatelly, no need to
do no-op ulist frees.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-02-13 14:05:24 +01:00
parent 53d3235995
commit 81353d50f5
1 changed files with 3 additions and 2 deletions
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5
fs/btrfs/qgroup.c
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@ -1945,13 +1945,14 @@ btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
u64 nr_old_roots = 0;
int ret = 0;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
return 0;
if (new_roots)
nr_new_roots = new_roots->nnodes;
if (old_roots)
nr_old_roots = old_roots->nnodes;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
goto out_free;
BUG_ON(!fs_info->quota_root);
trace_btrfs_qgroup_account_extent(fs_info, bytenr, num_bytes,