2018-12-23 19:19:51 +01:00
|
|
|
#include <fcntl.h>
|
|
|
|
#include <linux/dm-ioctl.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
|
|
|
|
|
|
#include "dm-util.h"
|
|
|
|
#include "fd-util.h"
|
2019-07-10 10:22:48 +02:00
|
|
|
#include "string-util.h"
|
2020-07-08 20:57:31 +02:00
|
|
|
|
|
|
|
int dm_deferred_remove_cancel(const char *name) {
|
|
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
struct message {
|
|
|
|
struct dm_ioctl dm_ioctl;
|
|
|
|
struct dm_target_msg dm_target_msg;
|
|
|
|
char msg_text[STRLEN("@cancel_deferred_remove") + 1];
|
|
|
|
} _packed_ message = {
|
|
|
|
.dm_ioctl = {
|
|
|
|
.version = {
|
|
|
|
DM_VERSION_MAJOR,
|
|
|
|
DM_VERSION_MINOR,
|
|
|
|
DM_VERSION_PATCHLEVEL
|
|
|
|
},
|
|
|
|
.data_size = sizeof(struct message),
|
|
|
|
.data_start = sizeof(struct dm_ioctl),
|
|
|
|
},
|
|
|
|
.msg_text = "@cancel_deferred_remove",
|
|
|
|
};
|
|
|
|
|
|
|
|
assert(name);
|
|
|
|
|
|
|
|
if (strlen(name) >= sizeof(message.dm_ioctl.name))
|
|
|
|
return -ENODEV; /* A device with a name longer than this cannot possibly exist */
|
|
|
|
|
|
|
|
strncpy_exact(message.dm_ioctl.name, name, sizeof(message.dm_ioctl.name));
|
|
|
|
|
|
|
|
fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
|
|
|
return -errno;
|
|
|
|
|
|
|
|
if (ioctl(fd, DM_TARGET_MSG, &message))
|
|
|
|
return -errno;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|