Line data    Source code

       1             : #include <fcntl.h>
       2             : #include <linux/dm-ioctl.h>
       3             : #include <string.h>
       4             : #include <sys/ioctl.h>
       5             : 
       6             : #include "dm-util.h"
       7             : #include "fd-util.h"
       8             : #include "string-util.h"
       9             : 
      10           0 : int dm_deferred_remove(const char *name) {
      11             : 
      12           0 :         struct dm_ioctl dm = {
      13             :                 .version = {
      14             :                         DM_VERSION_MAJOR,
      15             :                         DM_VERSION_MINOR,
      16             :                         DM_VERSION_PATCHLEVEL
      17             :                 },
      18             :                 .data_size = sizeof(dm),
      19             :                 .flags = DM_DEFERRED_REMOVE,
      20             :         };
      21             : 
      22           0 :         _cleanup_close_ int fd = -1;
      23             : 
      24           0 :         assert(name);
      25             : 
      26             :         /* Unfortunately, libcryptsetup doesn't provide a proper API for this, hence call the ioctl()
      27             :          * directly. */
      28             : 
      29           0 :         if (strlen(name) >= sizeof(dm.name))
      30           0 :                 return -ENODEV; /* A device with a name longer than this cannot possibly exist */
      31             : 
      32           0 :         fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC);
      33           0 :         if (fd < 0)
      34           0 :                 return -errno;
      35             : 
      36           0 :         strncpy_exact(dm.name, name, sizeof(dm.name));
      37             : 
      38           0 :         if (ioctl(fd, DM_DEV_REMOVE, &dm))
      39           0 :                 return -errno;
      40             : 
      41           0 :         return 0;
      42             : }