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authorNeilBrown <neilb@suse.de>2006-03-27 01:18:13 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:45:02 -0800
commit63c70c4f3a30e77e6f445bd16eff7934a031ebd3 (patch)
tree12d2cd6cec5cd304bdf514ec8999a44c26f058ae /drivers/md/raid1.c
parentb578d55fdd80140f657130abd85aebeb345755fb (diff)
[PATCH] md: Split reshape handler in check_reshape and start_reshape
check_reshape checks validity and does things that can be done instantly - like adding devices to raid1. start_reshape initiates a restriping process to convert the whole array. 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 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index b65b8cfbdf30..04418e10d1dc 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1976,7 +1976,7 @@ static int raid1_resize(mddev_t *mddev, sector_t sectors)
return 0;
}
-static int raid1_reshape(mddev_t *mddev, int raid_disks)
+static int raid1_reshape(mddev_t *mddev)
{
/* We need to:
* 1/ resize the r1bio_pool
@@ -1993,10 +1993,22 @@ static int raid1_reshape(mddev_t *mddev, int raid_disks)
struct pool_info *newpoolinfo;
mirror_info_t *newmirrors;
conf_t *conf = mddev_to_conf(mddev);
- int cnt;
+ int cnt, raid_disks;
int d, d2;
+ /* Cannot change chunk_size, layout, or level */
+ if (mddev->chunk_size != mddev->new_chunk ||
+ mddev->layout != mddev->new_layout ||
+ mddev->level != mddev->new_level) {
+ mddev->new_chunk = mddev->chunk_size;
+ mddev->new_layout = mddev->layout;
+ mddev->new_level = mddev->level;
+ return -EINVAL;
+ }
+
+ raid_disks = mddev->raid_disks + mddev->delta_disks;
+
if (raid_disks < conf->raid_disks) {
cnt=0;
for (d= 0; d < conf->raid_disks; d++)
@@ -2043,6 +2055,7 @@ static int raid1_reshape(mddev_t *mddev, int raid_disks)
mddev->degraded += (raid_disks - conf->raid_disks);
conf->raid_disks = mddev->raid_disks = raid_disks;
+ mddev->delta_disks = 0;
conf->last_used = 0; /* just make sure it is in-range */
lower_barrier(conf);
@@ -2084,7 +2097,7 @@ static struct mdk_personality raid1_personality =
.spare_active = raid1_spare_active,
.sync_request = sync_request,
.resize = raid1_resize,
- .reshape = raid1_reshape,
+ .check_reshape = raid1_reshape,
.quiesce = raid1_quiesce,
};