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[v3,1/3] Btrfs: qgroup: free reserved in exceeding quota.

Message ID 1420438604-4846-2-git-send-email-yangds.fnst@cn.fujitsu.com (mailing list archive)
State Superseded
Headers show

Commit Message

Yang Dongsheng Jan. 5, 2015, 6:16 a.m. UTC 
When we exceed quota limit in writing, we will free
some reserved extent when we need to drop but not free
account in qgroup. It means, each time we exceed quota
in writing, there will be some remain space in qg->reserved
we can not use any more. If things go on like this, the
all space will be ate up.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
---
 fs/btrfs/extent-tree.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a80b971..88b4e32 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5275,8 +5275,11 @@  out_fail:
 			to_free = 0;
 	}
 	spin_unlock(&BTRFS_I(inode)->lock);
-	if (dropped)
+	if (dropped) {
+		if (root->fs_info->quota_enabled)
+			btrfs_qgroup_free(root, dropped * root->nodesize);
 		to_free += btrfs_calc_trans_metadata_size(root, dropped);
+	}
 
 	if (to_free) {
 		btrfs_block_rsv_release(root, block_rsv, to_free);