ioctls/dm.c

   1 #include <linux/ioctl.h>
   2 #include <linux/dm-ioctl.h>
   3
   4 #include "shm.h"
   5 #include "maps.h"
   6 #include "utils.h"
   7 #include "ioctls.h"
   8 #include "random.h"
   9
  10 static const struct ioctl dm_ioctls[] = {
  11         IOCTL(DM_VERSION),
  12         IOCTL(DM_REMOVE_ALL),
  13         IOCTL(DM_LIST_DEVICES),
  14         IOCTL(DM_DEV_CREATE),
  15         IOCTL(DM_DEV_REMOVE),
  16         IOCTL(DM_DEV_RENAME),
  17         IOCTL(DM_DEV_SUSPEND),
  18         IOCTL(DM_DEV_STATUS),
  19         IOCTL(DM_DEV_WAIT),
  20         IOCTL(DM_TABLE_LOAD),
  21         IOCTL(DM_TABLE_CLEAR),
  22         IOCTL(DM_TABLE_DEPS),
  23         IOCTL(DM_TABLE_STATUS),
  24         IOCTL(DM_LIST_VERSIONS),
  25         IOCTL(DM_TARGET_MSG),
  26         IOCTL(DM_DEV_SET_GEOMETRY),
  27 };
  28
  29 static const char *const dm_devs[] = {
  30         "device-mapper",
  31 };
  32
  33 static void dm_sanitise(const struct ioctl_group *grp, int childno)
  34 {
  35         struct dm_ioctl *dm;
  36
  37         pick_random_ioctl(grp, childno);
  38
  39         shm->syscall[childno].a3 = (unsigned long) page_rand;
  40         dm = (struct dm_ioctl *)shm->syscall[childno].a3;
  41
  42         /* set a sensible version to get past the initial checks */
  43         dm->version[0] = DM_VERSION_MAJOR;
  44         dm->version[1] = DM_VERSION_MINOR;
  45         dm->version[2] = DM_VERSION_PATCHLEVEL;
  46
  47         /* clear one of these strings to pass some kernel validation */
  48         if (rand_bool())
  49                 dm->name[0] = 0;
  50         else
  51                 dm->uuid[0] = 0;
  52 }
  53
  54 static const struct ioctl_group dm_grp_misc = {
  55         .devtype = DEV_MISC,
  56         .devs = dm_devs,
  57         .devs_cnt = ARRAY_SIZE(dm_devs),
  58         .sanitise = dm_sanitise,
  59         .ioctls = dm_ioctls,
  60         .ioctls_cnt = ARRAY_SIZE(dm_ioctls),
  61 };
  62
  63 REG_IOCTL_GROUP(dm_grp_misc)
  64
  65 static const struct ioctl_group dm_grp_block = {
  66         .devtype = DEV_BLOCK,
  67         .devs = dm_devs,
  68         .devs_cnt = ARRAY_SIZE(dm_devs),
  69         .sanitise = dm_sanitise,
  70         .ioctls = dm_ioctls,
  71         .ioctls_cnt = ARRAY_SIZE(dm_ioctls),
  72 };
  73
  74 REG_IOCTL_GROUP(dm_grp_block)