btrfs: factor btrfs_init_btree_inode() out of open_ctree()

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
[renamed to btrfs_init_btree_inode]
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b95b033..6a64e66 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2169,6 +2169,36 @@ static void btrfs_init_balance(struct btrfs_fs_info *fs_info)
        init_waitqueue_head(&fs_info->balance_wait_q);
 }
 
+static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info,
+                                  struct btrfs_root *tree_root)
+{
+       fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID;
+       set_nlink(fs_info->btree_inode, 1);
+       /*
+        * we set the i_size on the btree inode to the max possible int.
+        * the real end of the address space is determined by all of
+        * the devices in the system
+        */
+       fs_info->btree_inode->i_size = OFFSET_MAX;
+       fs_info->btree_inode->i_mapping->a_ops = &btree_aops;
+       fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi;
+
+       RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node);
+       extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree,
+                            fs_info->btree_inode->i_mapping);
+       BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0;
+       extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree);
+
+       BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops;
+
+       BTRFS_I(fs_info->btree_inode)->root = tree_root;
+       memset(&BTRFS_I(fs_info->btree_inode)->location, 0,
+              sizeof(struct btrfs_key));
+       set_bit(BTRFS_INODE_DUMMY,
+               &BTRFS_I(fs_info->btree_inode)->runtime_flags);
+       btrfs_insert_inode_hash(fs_info->btree_inode);
+}
+
 int open_ctree(struct super_block *sb,
               struct btrfs_fs_devices *fs_devices,
               char *options)
@@ -2329,31 +2359,7 @@ int open_ctree(struct super_block *sb,
        sb->s_blocksize_bits = blksize_bits(4096);
        sb->s_bdi = &fs_info->bdi;
 
-       fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID;
-       set_nlink(fs_info->btree_inode, 1);
-       /*
-        * we set the i_size on the btree inode to the max possible int.
-        * the real end of the address space is determined by all of
-        * the devices in the system
-        */
-       fs_info->btree_inode->i_size = OFFSET_MAX;
-       fs_info->btree_inode->i_mapping->a_ops = &btree_aops;
-       fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi;
-
-       RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node);
-       extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree,
-                            fs_info->btree_inode->i_mapping);
-       BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0;
-       extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree);
-
-       BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops;
-
-       BTRFS_I(fs_info->btree_inode)->root = tree_root;
-       memset(&BTRFS_I(fs_info->btree_inode)->location, 0,
-              sizeof(struct btrfs_key));
-       set_bit(BTRFS_INODE_DUMMY,
-               &BTRFS_I(fs_info->btree_inode)->runtime_flags);
-       btrfs_insert_inode_hash(fs_info->btree_inode);
+       btrfs_init_btree_inode(fs_info, tree_root);
 
        spin_lock_init(&fs_info->block_group_cache_lock);
        fs_info->block_group_cache_tree = RB_ROOT;