Btrfs: add tree modification log functions

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5b8ef8e..e53bfb9 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1078,7 +1078,7 @@ struct btrfs_fs_info {
         * is required instead of the faster short fsync log commits
         */
        u64 last_trans_log_full_commit;
-       unsigned long mount_opt:21;
+       unsigned long mount_opt;
        unsigned long compress_type:4;
        u64 max_inline;
        u64 alloc_start;
@@ -1129,6 +1129,15 @@ struct btrfs_fs_info {
        spinlock_t delayed_iput_lock;
        struct list_head delayed_iputs;
 
+       /* this protects tree_mod_seq_list */
+       spinlock_t tree_mod_seq_lock;
+       atomic_t tree_mod_seq;
+       struct list_head tree_mod_seq_list;
+
+       /* this protects tree_mod_log */
+       rwlock_t tree_mod_log_lock;
+       struct rb_root tree_mod_log;
+
        atomic_t nr_async_submits;
        atomic_t async_submit_draining;
        atomic_t nr_async_bios;
@@ -2496,11 +2505,11 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                        struct btrfs_root *root, u32 blocksize,
                                        u64 parent, u64 root_objectid,
                                        struct btrfs_disk_key *key, int level,
-                                       u64 hint, u64 empty_size, int for_cow);
+                                       u64 hint, u64 empty_size);
 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
                           struct btrfs_root *root,
                           struct extent_buffer *buf,
-                          u64 parent, int last_ref, int for_cow);
+                          u64 parent, int last_ref);
 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
                                            struct btrfs_root *root,
                                            u64 bytenr, u32 blocksize,
@@ -3098,4 +3107,16 @@ void btrfs_reada_detach(void *handle);
 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
                         u64 start, int err);
 
+/* delayed seq elem */
+struct seq_list {
+       struct list_head list;
+       u64 seq;
+       u32 flags;
+};
+
+void btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
+                           struct seq_list *elem);
+void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
+                           struct seq_list *elem);
+
 #endif