Btrfs: Link block groups of different raid types

The size of reserved space is stored in space_info. If block groups
of different raid types are linked to separate space_info, changing
allocation profile will corrupt reserved space accounting.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 19 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1866dff0538e..55265c24ab96 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -714,34 +714,18 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
         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;
-        }
+        list_for_each_entry_rcu(found, head, list)
+                total_used += found->disk_used;
         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 - (total_used >> bits);
-        buf->f_bavail = buf->f_blocks - (data_used >> bits);
+        buf->f_bavail = buf->f_bfree;
         buf->f_bsize = dentry->d_sb->s_blocksize;
         buf->f_type = BTRFS_SUPER_MAGIC;