btrfs: add members to fs_devices to track fsid changes

[sfrench/cifs-2.6.git] / fs / btrfs / volumes.h

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index bdee4b60e0ba09583d0a66e2be05e582adf8d35a..1d936ce282c3537d8ac33f45dd7cdda234b0476c 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -211,6 +211,7 @@ BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
 struct btrfs_fs_devices {
        u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
        u8 metadata_uuid[BTRFS_FSID_SIZE];
+       bool fsid_change;
        struct list_head fs_list;
 
        u64 num_devices;
@@ -219,6 +220,10 @@ struct btrfs_fs_devices {
        u64 missing_devices;
        u64 total_rw_bytes;
        u64 total_devices;
+
+       /* Highest generation number of seen devices */
+       u64 latest_generation;
+
        struct block_device *latest_bdev;
 
        /* all of the devices in the FS, protected by a mutex