Btrfs: Seed device support

[linux-2.6-block.git] / fs / btrfs / ctree.c

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8bb452456d90ef8e58d857f57d553443d58b2be9..dd1c03aea2dfe3835f346296d592586748be69ac 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -185,6 +185,10 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
        btrfs_set_header_owner(cow, new_root_objectid);
        btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN);
 
+       write_extent_buffer(cow, root->fs_info->fsid,
+                           (unsigned long)btrfs_header_fsid(cow),
+                           BTRFS_FSID_SIZE);
+
        WARN_ON(btrfs_header_generation(buf) > trans->transid);
        ret = btrfs_inc_ref(trans, new_root, buf, cow, NULL);
        kfree(new_root);
@@ -274,6 +278,10 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
        btrfs_set_header_owner(cow, root->root_key.objectid);
        btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN);
 
+       write_extent_buffer(cow, root->fs_info->fsid,
+                           (unsigned long)btrfs_header_fsid(cow),
+                           BTRFS_FSID_SIZE);
+
        WARN_ON(btrfs_header_generation(buf) > trans->transid);
        if (btrfs_header_generation(buf) != trans->transid) {
                u32 nr_extents;