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authorDarrick J. Wong <djwong@us.ibm.com>2006-03-27 01:17:54 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:44:59 -0800
commit3ac51e741a46af7a20f55e79d3e3aeaa93c6c544 (patch)
treecab595a4d9691d7602616337b7862a1a3d692b97 /drivers/md/dm.h
parent1134e5ae79bab61c05657ca35a6297cf87202e35 (diff)
[PATCH] dm store geometry
Allow drive geometry to be stored with a new DM_DEV_SET_GEOMETRY ioctl. Device-mapper will now respond to HDIO_GETGEO. If the geometry information is not available, zero will be returned for all of the parameters. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/dm.h')
-rw-r--r--drivers/md/dm.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 79e800051a10..fd90bc8f9e45 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -14,6 +14,7 @@
#include <linux/device-mapper.h>
#include <linux/list.h>
#include <linux/blkdev.h>
+#include <linux/hdreg.h>
#define DM_NAME "device-mapper"
#define DMWARN(f, x...) printk(KERN_WARNING DM_NAME ": " f "\n" , ## x)
@@ -85,6 +86,12 @@ int dm_wait_event(struct mapped_device *md, int event_nr);
struct gendisk *dm_disk(struct mapped_device *md);
int dm_suspended(struct mapped_device *md);
+/*
+ * Geometry functions.
+ */
+int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo);
+int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo);
+
/*-----------------------------------------------------------------
* Functions for manipulating a table. Tables are also reference
* counted.