1 files changed, 26 insertions, 3 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 9771eb8694b6..ff3dd55f294d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -752,14 +752,37 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         struct btrfs_root *root = btrfs_sb(dentry->d_sb);
         struct btrfs_super_block *disk_super = &root->fs_info->super_copy;
+        struct list_head *head = &root->fs_info->space_info;
+        struct btrfs_space_info *found;
+        u64 total_used = 0;
+        u64 data_used = 0;
         int bits = dentry->d_sb->s_blocksize_bits;
         __be32 *fsid = (__be32 *)root->fs_info->fsid;
 
+        rcu_read_lock();
+        list_for_each_entry_rcu(found, head, list) {
+                if (found->flags & (BTRFS_BLOCK_GROUP_DUP|
+                                    BTRFS_BLOCK_GROUP_RAID10|
+                                    BTRFS_BLOCK_GROUP_RAID1)) {
+                        total_used += found->bytes_used;
+                        if (found->flags & BTRFS_BLOCK_GROUP_DATA)
+                                data_used += found->bytes_used;
+                        else
+                                data_used += found->total_bytes;
+                }
+
+                total_used += found->bytes_used;
+                if (found->flags & BTRFS_BLOCK_GROUP_DATA)
+                        data_used += found->bytes_used;
+                else
+                        data_used += found->total_bytes;
+        }
+        rcu_read_unlock();
+
         buf->f_namelen = BTRFS_NAME_LEN;
         buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits;
-        buf->f_bfree = buf->f_blocks -
-                (btrfs_super_bytes_used(disk_super) >> bits);
-        buf->f_bavail = buf->f_bfree;
+        buf->f_bfree = buf->f_blocks - (total_used >> bits);
+        buf->f_bavail = buf->f_blocks - (data_used >> bits);
         buf->f_bsize = dentry->d_sb->s_blocksize;
         buf->f_type = BTRFS_SUPER_MAGIC;