Btrfs: remove device tree

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 101 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index e93ba1a5c812..5ab25a0cb16a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -16,11 +16,10 @@ extern struct kmem_cache *btrfs_path_cachep;
 #define BTRFS_MAGIC "_BtRfS_M"
 
 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
-#define BTRFS_DEV_TREE_OBJECTID 2ULL
-#define BTRFS_EXTENT_TREE_OBJECTID 3ULL
-#define BTRFS_FS_TREE_OBJECTID 4ULL
-#define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
-#define BTRFS_FIRST_FREE_OBJECTID 6ULL
+#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
+#define BTRFS_FS_TREE_OBJECTID 3ULL
+#define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
+#define BTRFS_FIRST_FREE_OBJECTID 5ULL
 
 /*
  * we can actually store much bigger names, but lets not confuse the rest
@@ -111,12 +110,6 @@ struct btrfs_super_block {
         __le64 total_blocks;
         __le64 blocks_used;
         __le64 root_dir_objectid;
-        __le64 last_device_id;
-        /* fields below here vary with the underlying disk */
-        __le64 device_block_start;
-        __le64 device_num_blocks;
-        __le64 device_root;
-        __le64 device_id;
 } __attribute__ ((__packed__));
 
 /*
@@ -251,11 +244,6 @@ struct btrfs_csum_item {
         u8 csum;
 } __attribute__ ((__packed__));
 
-struct btrfs_device_item {
-        __le16 pathlen;
-        __le64 device_id;
-} __attribute__ ((__packed__));
-
 /* tag for the radix tree of block groups in ram */
 #define BTRFS_BLOCK_GROUP_DIRTY 0
 #define BTRFS_BLOCK_GROUP_AVAIL 1
@@ -286,11 +274,9 @@ struct btrfs_fs_info {
         spinlock_t hash_lock;
         struct btrfs_root *extent_root;
         struct btrfs_root *tree_root;
-        struct btrfs_root *dev_root;
         struct radix_tree_root fs_roots_radix;
         struct radix_tree_root pending_del_radix;
         struct radix_tree_root pinned_radix;
-        struct radix_tree_root dev_radix;
         struct radix_tree_root block_group_radix;
         struct radix_tree_root block_group_data_radix;
         struct radix_tree_root extent_map_radix;
@@ -386,11 +372,6 @@ struct btrfs_root {
 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
 
 /*
- * dev items list the devices that make up the FS
- */
-#define BTRFS_DEV_ITEM_KEY      35
-
-/*
  * string items are for debugging.  They just store a short string of
  * data in the FS
  */
@@ -880,62 +861,6 @@ static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
         s->root_dir_objectid = cpu_to_le64(val);
 }
 
-static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s)
-{
-        return le64_to_cpu(s->last_device_id);
-}
-
-static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s,
-                                                  u64 val)
-{
-        s->last_device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_id(struct btrfs_super_block *s)
-{
-        return le64_to_cpu(s->device_id);
-}
-
-static inline void btrfs_set_super_device_id(struct btrfs_super_block *s,
-                                                  u64 val)
-{
-        s->device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s)
-{
-        return le64_to_cpu(s->device_block_start);
-}
-
-static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
-                                                      *s, u64 val)
-{
-        s->device_block_start = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s)
-{
-        return le64_to_cpu(s->device_num_blocks);
-}
-
-static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
-                                                     *s, u64 val)
-{
-        s->device_num_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_root(struct btrfs_super_block *s)
-{
-        return le64_to_cpu(s->device_root);
-}
-
-static inline void btrfs_set_super_device_root(struct btrfs_super_block
-                                                      *s, u64 val)
-{
-        s->device_root = cpu_to_le64(val);
-}
-
-
 static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
 {
         return (u8 *)l->items;
@@ -1031,28 +956,6 @@ static inline void btrfs_set_file_extent_num_blocks(struct
         e->num_blocks = cpu_to_le64(val);
 }
 
-static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d)
-{
-        return le16_to_cpu(d->pathlen);
-}
-
-static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d,
-                                                u16 val)
-{
-        d->pathlen = cpu_to_le16(val);
-}
-
-static inline u64 btrfs_device_id(struct btrfs_device_item *d)
-{
-        return le64_to_cpu(d->device_id);
-}
-
-static inline void btrfs_set_device_id(struct btrfs_device_item *d,
-                                                u64 val)
-{
-        d->device_id = cpu_to_le64(val);
-}
-
 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
 {
         return sb->s_fs_info;