Btrfs: add tree mod log to fs_info

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index f43307492518..f51ad8477f18 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1914,11 +1914,14 @@ int open_ctree(struct super_block *sb,
         spin_lock_init(&fs_info->delayed_iput_lock);
         spin_lock_init(&fs_info->defrag_inodes_lock);
         spin_lock_init(&fs_info->free_chunk_lock);
+        spin_lock_init(&fs_info->tree_mod_seq_lock);
+        rwlock_init(&fs_info->tree_mod_log_lock);
         mutex_init(&fs_info->reloc_mutex);
 
         init_completion(&fs_info->kobj_unregister);
         INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
         INIT_LIST_HEAD(&fs_info->space_info);
+        INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
         btrfs_mapping_init(&fs_info->mapping_tree);
         btrfs_init_block_rsv(&fs_info->global_block_rsv);
         btrfs_init_block_rsv(&fs_info->delalloc_block_rsv);
@@ -1931,12 +1934,14 @@ int open_ctree(struct super_block *sb,
         atomic_set(&fs_info->async_submit_draining, 0);
         atomic_set(&fs_info->nr_async_bios, 0);
         atomic_set(&fs_info->defrag_running, 0);
+        atomic_set(&fs_info->tree_mod_seq, 0);
         fs_info->sb = sb;
         fs_info->max_inline = 8192 * 1024;
         fs_info->metadata_ratio = 0;
         fs_info->defrag_inodes = RB_ROOT;
         fs_info->trans_no_join = 0;
         fs_info->free_chunk_space = 0;
+        fs_info->tree_mod_log = RB_ROOT;
 
         /* readahead state */
         INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT);