/* Un-mount or re-mount test file system */
static void tests_mnt(int mnt)
{
static struct mntent mount_info;
char *source;
char *target;
char *filesystemtype;
unsigned long mountflags;
char *data;
static char cwd[4096];
if (mnt == 0) {
CHECK(tests_get_mount_info(&mount_info));
if (strcmp(mount_info.mnt_dir,"/") == 0)
return;
CHECK(getcwd(cwd, 4096) != NULL);
CHECK(chdir("/") != -1);
CHECK(umount(tests_file_system_mount_dir) != -1);
} else {
source = mount_info.mnt_fsname;
target = tests_file_system_mount_dir;
filesystemtype = tests_file_system_type;
data = mount_info.mnt_opts;
process_mount_options(&data, &mountflags);
CHECK(mount(source, target, filesystemtype, mountflags, data)
!= -1);
CHECK(chdir(cwd) != -1);
}
}
/* Un-mount and re-mount test file system */
void tests_remount(void)
{
struct mntent mount_info;
char *source;
char *target;
char *filesystemtype;
unsigned long mountflags;
void *data;
char cwd[4096];
CHECK(tests_get_mount_info(&mount_info));
if (strcmp(mount_info.mnt_dir,"/") == 0)
return;
CHECK(getcwd(cwd, 4096) != NULL);
CHECK(chdir("/") != -1);
CHECK(umount(tests_file_system_mount_dir) != -1);
source = mount_info.mnt_fsname;
target = tests_file_system_mount_dir;
filesystemtype = tests_file_system_type;
mountflags = 0;
data = mount_info.mnt_opts;
if (data) {
if (strcmp(data, "rw") == 0)
data = NULL;
else if (strncmp(data, "rw,", 3) == 0)
data += 3;
}
CHECK(mount(source, target, filesystemtype, mountflags, data) != -1);
CHECK(chdir(cwd) != -1);
}
/*
* Re-mount test file system. Randomly choose how to do this: re-mount R/O then
* re-mount R/W, or unmount, then mount R/W, or unmount then mount R/O then
* re-mount R/W, etc. This should improve test coverage.
*/
void tests_remount(void)
{
int err;
struct mntent mount_info;
char *source, *target, *filesystemtype, *data;
char cwd[4096];
unsigned long mountflags, flags;
unsigned int rorw1, um, um_ro, um_rorw, rorw2;
CHECK(tests_get_mount_info(&mount_info));
if (strcmp(mount_info.mnt_dir,"/") == 0)
return;
/* Save current working directory */
CHECK(getcwd(cwd, 4096) != NULL);
/* Temporarily change working directory to '/' */
CHECK(chdir("/") != -1);
/* Choose what to do */
rorw1 = tests_random_no(2);
um = tests_random_no(2);
um_ro = tests_random_no(2);
um_rorw = tests_random_no(2);
rorw2 = tests_random_no(2);
if (rorw1 + um + rorw2 == 0)
um = 1;
source = mount_info.mnt_fsname;
target = tests_file_system_mount_dir;
filesystemtype = tests_file_system_type;
data = mount_info.mnt_opts;
process_mount_options(&data, &mountflags);
if (rorw1) {
/* Re-mount R/O and then re-mount R/W */
flags = mountflags | MS_RDONLY | MS_REMOUNT;
err = mount(source, target, filesystemtype, flags, data);
CHECK(err != -1);
flags = mountflags | MS_REMOUNT;
flags &= ~((unsigned long)MS_RDONLY);
err = mount(source, target, filesystemtype, flags, data);
CHECK(err != -1);
}
if (um) {
/* Unmount and mount */
if (um_ro) {
/* But re-mount R/O before unmounting */
flags = mountflags | MS_RDONLY | MS_REMOUNT;
err = mount(source, target, filesystemtype,
flags, data);
CHECK(err != -1);
}
CHECK(umount(target) != -1);
if (!um_rorw) {
/* Mount R/W straight away */
err = mount(source, target, filesystemtype,
mountflags, data);
CHECK(err != -1);
} else {
/* Mount R/O and then re-mount R/W */
err = mount(source, target, filesystemtype,
mountflags | MS_RDONLY, data);
CHECK(err != -1);
flags = mountflags | MS_REMOUNT;
flags &= ~((unsigned long)MS_RDONLY);
err = mount(source, target, filesystemtype,
flags, data);
CHECK(err != -1);
}
}
if (rorw2) {
/* Re-mount R/O and then re-mount R/W */
flags = mountflags | MS_RDONLY | MS_REMOUNT;
err = mount(source, target, filesystemtype, flags, data);
CHECK(err != -1);
flags = mountflags | MS_REMOUNT;
flags &= ~((unsigned long)MS_RDONLY);
err = mount(source, target, filesystemtype, flags, data);
CHECK(err != -1);
}
/* Restore the previous working directory */
CHECK(chdir(cwd) != -1);
}
