md/raid5 revise rules for when to update metadata during reshape

[safe/jmp/linux-2.6] / drivers / md / linear.c

diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index c43c3b6..7a36e38 100644 (file)
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -18,8 +18,8 @@
 
 #include <linux/blkdev.h>
 #include <linux/raid/md_u.h>
-#include <linux/raid/md_k.h>
 #include <linux/seq_file.h>
+#include "md.h"
 #include "linear.h"
 
 /*
@@ -101,6 +101,16 @@ static int linear_congested(void *data, int bits)
        return ret;
 }
 
+static sector_t linear_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+{
+       linear_conf_t *conf = mddev_to_conf(mddev);
+
+       WARN_ONCE(sectors || raid_disks,
+                 "%s does not support generic reshape\n", __func__);
+
+       return conf->array_sectors;
+}
+
 static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 {
        linear_conf_t *conf;
@@ -139,8 +149,8 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
                    mddev->queue->max_sectors > (PAGE_SIZE>>9))
                        blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
 
-               disk->num_sectors = rdev->size * 2;
-               conf->array_sectors += rdev->size * 2;
+               disk->num_sectors = rdev->sectors;
+               conf->array_sectors += rdev->sectors;
 
                cnt++;
        }
@@ -253,7 +263,7 @@ static int linear_run (mddev_t *mddev)
        if (!conf)
                return 1;
        mddev->private = conf;
-       mddev->array_sectors = conf->array_sectors;
+       md_set_array_sectors(mddev, linear_size(mddev, 0, 0));
 
        blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
        mddev->queue->unplug_fn = linear_unplug;
@@ -287,7 +297,7 @@ static int linear_add(mddev_t *mddev, mdk_rdev_t *rdev)
        newconf->prev = mddev_to_conf(mddev);
        mddev->private = newconf;
        mddev->raid_disks++;
-       mddev->array_sectors = newconf->array_sectors;
+       md_set_array_sectors(mddev, linear_size(mddev, 0, 0));
        set_capacity(mddev->gendisk, mddev->array_sectors);
        return 0;
 }
@@ -385,6 +395,7 @@ static struct mdk_personality linear_personality =
        .stop           = linear_stop,
        .status         = linear_status,
        .hot_add_disk   = linear_add,
+       .size           = linear_size,
 };
 
 static int __init linear_init (void)