From 80cc7a431d9c3a858c788ca6cff9b11794aecec1 Mon Sep 17 00:00:00 2001
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Date: Sun, 7 Apr 2013 10:50:19 +0000
Subject: [PATCH] --- yaml --- r: 374858 b: refs/heads/master c:
 3f5e2d3b3877d34231bbe45856f3b78b7692e472 h: refs/heads/master v: v3

---
 [refs]                  |  2 +-
 trunk/fs/btrfs/qgroup.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index a1e26bdc0f28..94b54fcb6a4f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b7fef4f593007d52ba7fe4427e099bd71c63c521
+refs/heads/master: 3f5e2d3b3877d34231bbe45856f3b78b7692e472
diff --git a/trunk/fs/btrfs/qgroup.c b/trunk/fs/btrfs/qgroup.c
index 0932b839550c..2293da6f9e72 100644
--- a/trunk/fs/btrfs/qgroup.c
+++ b/trunk/fs/btrfs/qgroup.c
@@ -1412,6 +1412,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 	struct btrfs_qgroup *srcgroup;
 	struct btrfs_qgroup *dstgroup;
 	u32 level_size = 0;
+	u64 nums;
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
 	if (!fs_info->quota_enabled)
@@ -1422,6 +1423,20 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 		goto out;
 	}
 
+	if (inherit) {
+		i_qgroups = (u64 *)(inherit + 1);
+		nums = inherit->num_qgroups + 2 * inherit->num_ref_copies +
+		       2 * inherit->num_excl_copies;
+		for (i = 0; i < nums; ++i) {
+			srcgroup = find_qgroup_rb(fs_info, *i_qgroups);
+			if (!srcgroup) {
+				ret = -EINVAL;
+				goto out;
+			}
+			++i_qgroups;
+		}
+	}
+
 	/*
 	 * create a tracking group for the subvol itself
 	 */