diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dm-ioctl.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/dm-ioctl.h b/include/linux/dm-ioctl.h index 036f98bb840a..03f99db7ad7b 100644 --- a/include/linux/dm-ioctl.h +++ b/include/linux/dm-ioctl.h @@ -129,8 +129,14 @@ struct dm_target_spec { int32_t status; /* used when reading from kernel only */ /* - * Offset in bytes (from the start of this struct) to - * next target_spec. + * Location of the next dm_target_spec. + * - When specifying targets on a DM_TABLE_LOAD command, this value is + * the number of bytes from the start of the "current" dm_target_spec + * to the start of the "next" dm_target_spec. + * - When retrieving targets on a DM_TABLE_STATUS command, this value + * is the number of bytes from the start of the first dm_target_spec + * (that follows the dm_ioctl struct) to the start of the "next" + * dm_target_spec. */ uint32_t next; |