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#include <fcntl.h>
#include <linux/dm-ioctl.h>
#include <sys/ioctl.h>
#include "dm-util.h"
#include "fd-util.h"
#include "string-util.h"
int dm_deferred_remove(const char *name) {
struct dm_ioctl dm = {
.version = {
DM_VERSION_MAJOR,
DM_VERSION_MINOR,
DM_VERSION_PATCHLEVEL
},
.data_size = sizeof(dm),
.flags = DM_DEFERRED_REMOVE,
};
_cleanup_close_ int fd = -1;
assert(name);
/* Unfortunately, libcryptsetup doesn't provide a proper API for this, hence call the ioctl()
* directly. */
if (strlen(name) >= sizeof(dm.name))
return -ENODEV; /* A device with a name longer than this cannot possibly exist */
fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC);
if (fd < 0)
return -errno;
strncpy_exact(dm.name, name, sizeof(dm.name));
if (ioctl(fd, DM_DEV_REMOVE, &dm))
return -errno;
return 0;
}
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