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authorNeilBrown <neilb@cse.unsw.edu.au>2005-09-09 16:23:45 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 16:39:10 -0700
commit36fa30636fb84b209210299684e1be66d9e58217 (patch)
tree28a7473238932f1e7ade1a5a5ec67a113b6d6205 /include/linux/raid
parent6a07997fc34ac15a1c5dc650285d79b7604a2276 (diff)
[PATCH] md: all hot-add and hot-remove of md intent logging bitmaps
Both file-bitmaps and superblock bitmaps are supported. If you add a bitmap file on the array device, you lose. This introduces a 'default_bitmap_offset' field in mddev, as the ioctl used for adding a superblock bitmap doesn't have room for giving an offset. Later, this value will be setable via sysfs. Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/raid')
-rw-r--r--include/linux/raid/md_k.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 8c14ba565a4..817062bf735 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -278,6 +278,10 @@ struct mddev_s
* start of bitmap. May be
* negative, but not '0'
*/
+ long default_bitmap_offset; /* this is the offset to use when
+ * hot-adding a bitmap. It should
+ * eventually be settable by sysfs.
+ */
struct list_head all_mddevs;
};
@@ -314,6 +318,12 @@ struct mdk_personality_s
int (*resize) (mddev_t *mddev, sector_t sectors);
int (*reshape) (mddev_t *mddev, int raid_disks);
int (*reconfig) (mddev_t *mddev, int layout, int chunk_size);
+ /* quiesce moves between quiescence states
+ * 0 - fully active
+ * 1 - no new requests allowed
+ * others - reserved
+ */
+ void (*quiesce) (mddev_t *mddev, int state);
};