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(* hey emacs, this is OCaml code: -*- tuareg -*- *)
(* libnbd OCaml test case
* Copyright Red Hat
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* Note: Uses the old NBD.Buffer.t from libnbd <= 1.18 *)
open Ocaml_test_config
open Unix
let () =
let buf = Bytes.make 512 '\000' in
Bytes.set buf 10 '\001';
Bytes.set buf 510 '\x55';
Bytes.set buf 511 '\xAA';
let datafile, chan =
Filename.open_temp_file ~mode:[Open_binary] "510" ".data" in
let fd = descr_of_out_channel chan in
ftruncate fd 512;
close_out chan;
let nbd = NBD.create () in
NBD.connect_command nbd [nbdkit; "-s"; "--exit-with-parent"; "-v";
"file"; datafile];
let buf1 = NBD.Buffer.of_bytes buf in
let flags = let open NBD.CMD_FLAG in [FUA] in
let cookie = NBD.aio_pwrite nbd buf1 0_L ~flags in
while not (NBD.aio_command_completed nbd cookie) do
ignore (NBD.poll nbd (-1))
done;
let buf2 = NBD.Buffer.alloc 512 in
let cookie = NBD.aio_pread nbd buf2 0_L in
while not (NBD.aio_command_completed nbd cookie) do
ignore (NBD.poll nbd (-1))
done;
assert (buf = NBD.Buffer.to_bytes buf2);
let fd = openfile datafile [O_RDONLY] 0 in
let content = Bytes.create 512 in
assert (512 = read fd content 0 512);
close fd;
assert (buf = content);
unlink datafile
let () = Gc.compact ()
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