btrfs-progs: Document logic of btrfs_read_dev_super

[platform/upstream/btrfs-progs.git] / ctree.h

diff --git a/ctree.h b/ctree.h
index b92df1c..7db0cd9 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -2072,6 +2072,38 @@ BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
                         rtransid, 64);
 
+static inline struct btrfs_timespec* btrfs_root_ctime(
+               struct btrfs_root_item *root_item)
+{
+       unsigned long ptr = (unsigned long)root_item;
+       ptr += offsetof(struct btrfs_root_item, ctime);
+       return (struct btrfs_timespec *)ptr;
+}
+
+static inline struct btrfs_timespec* btrfs_root_otime(
+               struct btrfs_root_item *root_item)
+{
+       unsigned long ptr = (unsigned long)root_item;
+       ptr += offsetof(struct btrfs_root_item, otime);
+       return (struct btrfs_timespec *)ptr;
+}
+
+static inline struct btrfs_timespec* btrfs_root_stime(
+               struct btrfs_root_item *root_item)
+{
+       unsigned long ptr = (unsigned long)root_item;
+       ptr += offsetof(struct btrfs_root_item, stime);
+       return (struct btrfs_timespec *)ptr;
+}
+
+static inline struct btrfs_timespec* btrfs_root_rtime(
+               struct btrfs_root_item *root_item)
+{
+       unsigned long ptr = (unsigned long)root_item;
+       ptr += offsetof(struct btrfs_root_item, rtime);
+       return (struct btrfs_timespec *)ptr;
+}
+
 /* struct btrfs_root_backup */
 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
                   tree_root, 64);
@@ -2504,8 +2536,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
                           u64 size);
 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
                            struct btrfs_fs_info *fs_info);
-int btrfs_update_block_group(struct btrfs_trans_handle *trans,
-                            struct btrfs_root *root, u64 bytenr, u64 num,
+int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
                             int alloc, int mark_free);
 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
                              struct btrfs_root *root, u64 objectid,