Method fiemap

fs/extfs/extfs.cpp:1214–1216

        DO_EXT2FS(do_ext2fs_fallocate(fs, ino, o_offset, len));
    }
    virtual int fiemap(struct photon::fs::fiemap* map) override {
        DO_EXT2FS(do_ext2fs_fiemap(fs, ino, map));
    }
    virtual ssize_t fgetxattr(const char *name, void *value, size_t size) override {
        DO_EXT2FS(do_ext2fs_getxattr(fs, ino, name, value, size));
    }