Btrfs-progs: add uuid_tree_gen field to btrfs-show-super

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/btrfs-show-super.c b/btrfs-show-super.c
index f587f10..c815469 100644 (file)
--- a/btrfs-show-super.c
+++ b/btrfs-show-super.c
@@ -247,6 +247,8 @@ static void dump_superblock(struct btrfs_super_block *sb)
               (unsigned long long)btrfs_super_csum_size(sb));
        printf("cache_generation\t%llu\n",
               (unsigned long long)btrfs_super_cache_generation(sb));
+       printf("uuid_tree_generation\t%llu\n",
+              (unsigned long long)btrfs_super_uuid_tree_generation(sb));
 
        uuid_unparse(sb->dev_item.uuid, buf);
        printf("dev_item.uuid\t\t%s\n", buf);

diff --git a/ctree.h b/ctree.h
index a7143d9..704e990 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -437,9 +437,10 @@ struct btrfs_super_block {
        char label[BTRFS_LABEL_SIZE];
 
        __le64 cache_generation;
+       __le64 uuid_tree_generation;
 
        /* future expansion */
-       __le64 reserved[31];
+       __le64 reserved[30];
        u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
        struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
 } __attribute__ ((__packed__));
@@ -1934,6 +1935,8 @@ BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
                         csum_type, 16);
 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
                         cache_generation, 64);
+BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
+                        uuid_tree_generation, 64);
 
 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
 {