Function librbd_sys::rbd_read_iterate2 [−] [src]

pub unsafe extern "C" fn rbd_read_iterate2(
    image: rbd_image_t, 
    ofs: uint64_t, 
    len: uint64_t, 
    cb: Option<unsafe extern "C" fn(_: uint64_t, _: size_t, _: *const c_char, _: *mut c_void) -> c_int>, 
    arg: *mut c_void
) -> c_int

iterate read over an image Reads each region of the image and calls the callback. If the buffer pointer passed to the callback is NULL, the given extent is defined to be zeros (a hole). Normally the granularity for the callback is the image stripe size.

Arguments

  • image image to read
  • ofs offset to start from
  • len bytes of source image to cover
  • cb callback for each region @returns 0 success, error otherwise