ext2_ino_t get_inode()

in fs/extfs/extfs.cpp [1442:1489]

• 43 lines of code
• 9 McCabe index (conditional complexity)

    ext2_ino_t get_inode(const char *str, int follow, bool release) {
        ext2_ino_t ino = 0;
        DEFER(LOG_DEBUG("get_inode ", VALUE(str), VALUE(follow), VALUE(release), VALUE(ino)));

        auto func = [&]() -> ext2_ino_t * {
            ext2_ino_t *i = new ext2_ino_t;
            errcode_t ret = 0;
            if (follow) {
                ret = ext2fs_namei_follow(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, str, i);
            } else {
                auto parent = get_parent_dir_ino(fs, str);
                if (parent) {
                    auto filename = get_filename(str);
                    if (filename)
                        ret = ext2fs_namei(fs, EXT2_ROOT_INO, parent, filename, i);
                    else
                        ret = ext2fs_namei(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, str, i);
                } else {
                    ret = ext2fs_namei(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, str, i);
                }
            }
            if (ret) {
                LOG_DEBUG("ext2fs_namei not found ", VALUE(str), VALUE(follow));
                errno = -parse_extfs_error(fs, 0, ret);
                delete i;
                return nullptr;
            }
            LOG_DEBUG("ext2fs_namei ", VALUE(str), VALUE(follow), VALUE(*i));
            return i;
        };

        if (follow) {
            auto b = func();
            if (b) ino = *b;

        } else {
            auto b = ino_cache.borrow(str, func);
            if (b) ino = *b;
        }

        if (release) {
            LOG_DEBUG("release ino_cache ", VALUE(str), VALUE(release));
            auto b = ino_cache.borrow(str);
            b.recycle(true);
        }

        return ino;
    }