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Diffstat (limited to 'fs/btrfs/backref.h')
| -rw-r--r-- | fs/btrfs/backref.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h index ce700dfcc016..5005f579f235 100644 --- a/fs/btrfs/backref.h +++ b/fs/btrfs/backref.h @@ -69,6 +69,17 @@ struct btrfs_backref_walk_ctx { * about collecting root IDs. */ struct ulist *roots; + /* + * Used by iterate_extent_inodes(). Lookup and store functions for an + * optional cache which maps the logical address (bytenr) of leaves + * to an array of root IDs. + */ + bool (*cache_lookup)(u64 leaf_bytenr, void *user_ctx, + const u64 **root_ids_ret, int *root_count_ret); + void (*cache_store)(u64 leaf_bytenr, const struct ulist *root_ids, + void *user_ctx); + /* Context object to pass to @cache_lookup and @cache_store. */ + void *user_ctx; }; struct inode_fs_paths { |