static void test(void)
{
int status;
/* unshares the mount ns */
if (unshare(CLONE_NEWNS) == -1)
tst_brkm(TBROK | TERRNO, cleanup, "unshare failed");
/* makes sure parent mounts/umounts have no effect on a real system */
SAFE_MOUNT(cleanup, "none", "/", "none", MS_REC|MS_PRIVATE, NULL);
/* bind mounts DIRA to itself */
SAFE_MOUNT(cleanup, DIRA, DIRA, "none", MS_BIND, NULL);
/* makes mount DIRA shared */
SAFE_MOUNT(cleanup, "none", DIRA, "none", MS_SHARED, NULL);
if (do_clone_tests(CLONE_NEWNS, child_func, NULL, NULL, NULL) == -1)
tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
/* waits for child to make a slave mount */
TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1);
/* bind mounts DIRB to DIRA making contents of DIRB visible
* in DIRA */
SAFE_MOUNT(cleanup, DIRB, DIRA, "none", MS_BIND, NULL);
TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2);
TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1);
SAFE_UMOUNT(cleanup, DIRA);
TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2);
TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1);
/* checks that slave mount doesn't propagate to shared mount */
if ((access(DIRA"/A", F_OK) == 0) && (access(DIRA"/B", F_OK) == -1))
tst_resm(TPASS, "propagation from slave mount passed");
else
tst_resm(TFAIL, "propagation form slave mount failed");
TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2);
SAFE_WAIT(cleanup, &status);
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0)
tst_resm(TPASS, "propagation to slave mount passed");
else
tst_resm(TFAIL, "propagation to slave mount failed");
}
if (WIFSIGNALED(status)) {
tst_resm(TBROK, "child was killed with signal %s",
tst_strsig(WTERMSIG(status)));
return;
}
SAFE_UMOUNT(cleanup, DIRA);
}
static void test(void)
{
int status;
/* unshares the mount ns */
if (unshare(CLONE_NEWNS) == -1)
tst_brkm(TBROK | TERRNO, cleanup, "unshare failed");
/* makes sure parent mounts/umounts have no effect on a real system */
SAFE_MOUNT(cleanup, "none", "/", "none", MS_REC|MS_PRIVATE, NULL);
/* bind mounts DIRA to itself */
SAFE_MOUNT(cleanup, DIRA, DIRA, "none", MS_BIND, NULL);
/* makes mount DIRA shared */
SAFE_MOUNT(cleanup, "none", DIRA, "none", MS_SHARED, NULL);
if (do_clone_tests(CLONE_NEWNS, child_func, NULL, NULL, NULL) == -1)
tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
/* bind mounts DIRB to DIRA making contents of DIRB visible
* in DIRA */
SAFE_MOUNT(cleanup, DIRB, DIRA, "none", MS_BIND, NULL);
TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(cleanup, 0);
SAFE_UMOUNT(cleanup, DIRA);
TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(cleanup, 0);
if (access(DIRA"/B", F_OK) == 0)
tst_resm(TPASS, "shared mount in child passed");
else
tst_resm(TFAIL, "shared mount in child failed");
TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
SAFE_WAIT(cleanup, &status);
if (WIFEXITED(status)) {
if ((WEXITSTATUS(status) == 0))
tst_resm(TPASS, "shared mount in parent passed");
else
tst_resm(TFAIL, "shared mount in parent failed");
}
if (WIFSIGNALED(status)) {
tst_resm(TBROK, "child was killed with signal %s",
tst_strsig(WTERMSIG(status)));
return;
}
SAFE_UMOUNT(cleanup, DIRA);
}
int do_clone_unshare_test(int use_clone, unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1)
{
switch (use_clone) {
case T_NONE:
return do_plain_tests(fn1, arg1, NULL, NULL);
case T_CLONE:
return do_clone_tests(clone_flags, fn1, arg1, NULL, NULL);
case T_UNSHARE:
return do_unshare_tests(clone_flags, fn1, arg1, NULL, NULL);
default:
printf("%s: bad use_clone option: %d\n", __FUNCTION__,
use_clone);
return -1;
}
}