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authorNeilBrown <neilb@cse.unsw.edu.au>2005-09-09 19:23:45 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 19:39:10 -0400
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 8c14ba565a45..817062bf7352 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -278,6 +278,10 @@ struct mddev_s
278 * start of bitmap. May be 278 * start of bitmap. May be
279 * negative, but not '0' 279 * negative, but not '0'
280 */ 280 */
281 long default_bitmap_offset; /* this is the offset to use when
282 * hot-adding a bitmap. It should
283 * eventually be settable by sysfs.
284 */
281 285
282 struct list_head all_mddevs; 286 struct list_head all_mddevs;
283}; 287};
@@ -314,6 +318,12 @@ struct mdk_personality_s
314 int (*resize) (mddev_t *mddev, sector_t sectors); 318 int (*resize) (mddev_t *mddev, sector_t sectors);
315 int (*reshape) (mddev_t *mddev, int raid_disks); 319 int (*reshape) (mddev_t *mddev, int raid_disks);
316 int (*reconfig) (mddev_t *mddev, int layout, int chunk_size); 320 int (*reconfig) (mddev_t *mddev, int layout, int chunk_size);
321 /* quiesce moves between quiescence states
322 * 0 - fully active
323 * 1 - no new requests allowed
324 * others - reserved
325 */
326 void (*quiesce) (mddev_t *mddev, int state);
317}; 327};
318 328
319 329