From 2d01fe534a775dcab61651ef807fc118c579dd3d Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sat, 16 Sep 2023 03:00:30 +0200 Subject: libsqfs: Expose the directory reader cache query function Signed-off-by: David Oberhollenzer --- include/sqfs/dir_reader.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include') diff --git a/include/sqfs/dir_reader.h b/include/sqfs/dir_reader.h index 11f7ae0..ceac22b 100644 --- a/include/sqfs/dir_reader.h +++ b/include/sqfs/dir_reader.h @@ -253,6 +253,26 @@ SQFS_API int sqfs_dir_reader_get_inode(sqfs_dir_reader_t *rd, sqfs_u64 ref, SQFS_API int sqfs_dir_reader_get_root_inode(sqfs_dir_reader_t *rd, sqfs_inode_generic_t **inode); +/** + * @brief Try to lookup a cached inode number + * + * @memberof sqfs_dir_reader_t + * + * If the inode reader was created with the @ref SQFS_DIR_READER_DOT_ENTRIES + * flag, it maintains an internal cache of all directory inodes that it has + * seen while traversing the filesystem. The cache maps inode numbers to + * inode references. This is used to lookup the parent inode of directory. + * This function can be used to query the cache directly. + * + * @param rd A pointer to a directory reader. + * @param inode An inode number. + * @param ref Retrns an inode reference on success. + * + * @return Zero on success, @ref SQFS_ERROR_NO_ENTRY if the inode is unknown + */ +SQFS_API int sqfs_dir_reader_resolve_inum(sqfs_dir_reader_t *rd, + sqfs_u32 inode, sqfs_u64 *ref); + #ifdef __cplusplus } #endif -- cgit v1.2.3