Btrfs: add a device id to device items
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index c46d7ea..8dcf600 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1840,7 +1840,9 @@
u16 item_size;
u64 num_blocks;
u64 new_blocks;
+ u64 device_id;
int ret;
+
printk("adding disk %s\n", name);
path = btrfs_alloc_path();
if (!path)
@@ -1875,9 +1877,14 @@
path->slots[0], struct btrfs_device_item);
btrfs_set_device_pathlen(dev_item, namelen);
memcpy(dev_item + 1, name, namelen);
+
+ device_id = btrfs_super_last_device_id(root->fs_info->disk_super) + 1;
+ btrfs_set_super_last_device_id(root->fs_info->disk_super, device_id);
+ btrfs_set_device_id(dev_item, device_id);
mark_buffer_dirty(path->nodes[0]);
- ret = btrfs_insert_dev_radix(root, bdev, num_blocks, new_blocks);
+ ret = btrfs_insert_dev_radix(root, bdev, device_id, num_blocks,
+ new_blocks);
if (!ret) {
btrfs_set_super_total_blocks(root->fs_info->disk_super,