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|
(* libguestfs OCaml bindings
* Copyright (C) 2012 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
(* Test guestfs_mount_local. *)
open Unix
open Printf
let (//) = Filename.concat
(* Some settings. *)
let total_time = 60. (* seconds, excluding launch *)
let debug = true (* overview debugging messages *)
let rec main () =
Random.self_init ();
let fuse_writable =
try access "/dev/fuse" [W_OK]; true with Unix_error _ -> false in
if not fuse_writable then (
printf "%s: test skipped because /dev/fuse is not writable.\n"
Sys.executable_name;
exit 77
);
(* Allow the test to be skipped by setting this environment variable.
* This is for RHEL 5, where FUSE doesn't work very reliably.
*)
let () =
let name = "SKIP_TEST_GUESTFS_500_MOUNT_LOCAL_ML" in
let value = try Sys.getenv name with Not_found -> "" in
if value <> "" then (
printf "%s: test skipped because %s is set.\n"
Sys.executable_name name;
exit 77
)
in
let filename = "test1.img" in
let fd = openfile filename [O_WRONLY;O_CREAT;O_NOCTTY;O_TRUNC] 0o666 in
ftruncate fd (500 * 1024 * 1024);
close fd;
let mp = "mp" in
(try rmdir mp with Unix_error _ -> ());
mkdir mp 0o700;
start_test filename mp;
unlink filename;
rmdir mp;
Gc.compact ()
and start_test filename mp =
(* Create a filesystem for the tests. *)
let g = new Guestfs.guestfs () in
g#add_drive_opts filename;
g#launch ();
g#part_disk "/dev/sda" "mbr";
g#mkfs "ext2" "/dev/sda1";
g#mount "/dev/sda1" "/";
(* Randomly mount the filesystem and repeat. Keep going until we
* finish the test.
*)
let start_t = time () in
let rec loop () =
let t = time () in
if t -. start_t < total_time then (
if debug then eprintf "%s < mounting filesystem\n%!" mp;
g#mount_local mp;
(* Run test in an exec'd subprocess. *)
let args = [| Sys.executable_name; "--test"; mp |] in
let pid = fork () in
if pid = 0 then ( (* child *)
try execv Sys.executable_name args
with exn -> prerr_endline (Printexc.to_string exn); exit 1
);
(* Run FUSE main loop. This processes requests until the
* subprocess unmounts the filesystem.
*)
g#mount_local_run ();
let _, status = waitpid [] pid in
(match status with
| WEXITED 0 -> ()
| WEXITED i ->
eprintf "test subprocess failed (exit code %d)\n" i;
exit 1
| WSIGNALED i | WSTOPPED i ->
eprintf "test subprocess signaled/stopped (signal %d)\n" i;
exit 1
);
loop ()
)
in
loop ();
g#shutdown ();
g#close ()
(* This is run in a child program. *)
and test_mountpoint mp =
if debug then eprintf "%s | testing filesystem\n%!" mp;
(* Run through the same set of tests repeatedly a number of times.
* The aim of this stress test is repeated mount/unmount, not testing
* FUSE itself, so we don't do much here.
*)
for pass = 0 to Random.int 32 do
mkdir (mp // "tmp.d") 0o700;
let chan = open_out (mp // "file") in
let s = String.make (Random.int (128 * 1024)) (Char.chr (Random.int 256)) in
output_string chan s;
close_out chan;
rename (mp // "tmp.d") (mp // "newdir");
link (mp // "file") (mp // "newfile");
if Random.int 32 = 0 then sleep 1;
rmdir (mp // "newdir");
unlink (mp // "file");
unlink (mp // "newfile")
done;
if debug then eprintf "%s > unmounting filesystem\n%!" mp;
unmount mp
(* We may need to retry this a few times because of processes which
* run in the background jumping into mountpoints. Only display
* errors if it still fails after many retries.
*)
and unmount mp =
let logfile = sprintf "%s.fusermount.log" mp in
let unlink_logfile () =
try unlink logfile with Unix_error _ -> ()
in
unlink_logfile ();
let run_command () =
Sys.command (sprintf "fusermount -u %s >> %s 2>&1"
(Filename.quote mp) (Filename.quote logfile)) = 0
in
let rec loop tries =
if tries <= 5 then (
if not (run_command ()) then (
sleep 1;
loop (tries+1)
)
) else (
ignore (Sys.command (sprintf "cat %s" (Filename.quote logfile)));
eprintf "fusermount: %s: failed, see earlier error messages\n" mp;
exit 1
)
in
loop 0;
unlink_logfile ()
let () =
match Array.to_list Sys.argv with
| [ _; "--test"; mp ] -> test_mountpoint mp
| [ _ ] -> main ()
| _ ->
eprintf "%s: unknown arguments given to program\n" Sys.executable_name;
exit 1
|
