diff options
| author | Andrew Morton <akpm@osdl.org> | 2004-04-17 03:24:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-04-17 03:24:54 -0700 |
| commit | e79ed99a7914f7c0792243dc7cd1a8af9baed58e (patch) | |
| tree | f220bd437271e43df63ea6fae6a4dd5e29c43a10 | |
| parent | e1489536b4ea1269c25364febb6c104963e191c0 (diff) | |
[PATCH] dm: fix a comment
From: Kevin Corry <kevcorry@us.ibm.com>
Clarify the comment regarding the "next" field in struct dm_target_spec. The
"next" field has different behavior if you're performing a DM_TABLE_STATUS
command than it does if you're performing a DM_TABLE_LOAD command.
See populate_table() and retrieve_status() in drivers/md/dm-ioctl.c for more
details on how this field is used.
| -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; |