path: root/include/linux/raid/md.h
diff options
authorNeilBrown <neilb@suse.de>2006-03-27 01:18:11 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:45:01 -0800
commitf67055780caac6a99f43834795c43acf99eba6a6 (patch)
tree6b80e7b4cb300edb0910dbad1d840ff8e2f36ae5 /include/linux/raid/md.h
parent[PATCH] md: Final stages of raid5 expand code (diff)
[PATCH] md: Checkpoint and allow restart of raid5 reshape
We allow the superblock to record an 'old' and a 'new' geometry, and a position where any conversion is up to. The geometry allows for changing chunksize, layout and level as well as number of devices. When using verion-0.90 superblock, we convert the version to 0.91 while the conversion is happening so that an old kernel will refuse the assemble the array. For version-1, we use a feature bit for the same effect. When starting an array we check for an incomplete reshape and restart the reshape process if needed. If the reshape stopped at an awkward time (like when updating the first stripe) we refuse to assemble the array, and let user-space worry about it. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/raid/md.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index 9c77cde5a795..66b44e5e0d6e 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -95,6 +95,8 @@ extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
extern void md_do_sync(mddev_t *mddev);
extern void md_new_event(mddev_t *mddev);
+extern void md_update_sb(mddev_t * mddev);
#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }