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Btrfs: qgroup: free reserved in exceeding quota.

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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>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Dongsheng Yang 2014-12-12 16:44:34 +08:00 committed by Chris Mason
parent 4087cf24ae
commit 804ca127fb
1 changed files with 4 additions and 1 deletions
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5
fs/btrfs/extent-tree.c
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@ -5475,8 +5475,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
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);