md: have raid0 report its formation

Report to the user what are the raid zones

Signed-off-by: raziebe@gmail.com
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index d8692fc17963..62fde23bf281 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -52,6 +52,38 @@ static int raid0_congested(void *data, int bits)
         return ret;
 }
 
+/*
+ * inform the user of the raid configuration
+*/
+static void dump_zones(mddev_t *mddev)
+{
+        int j, k, h;
+        sector_t zone_size = 0;
+        sector_t zone_start = 0;
+        char b[BDEVNAME_SIZE];
+        raid0_conf_t *conf = mddev->private;
+        printk(KERN_INFO "******* %s configuration *********\n",
+                mdname(mddev));
+        h = 0;
+        for (j = 0; j < conf->nr_strip_zones; j++) {
+                printk(KERN_INFO "zone%d=[", j);
+                for (k = 0; k < conf->strip_zone[j].nb_dev; k++)
+                        printk("%s/",
+                        bdevname(conf->devlist[j*mddev->raid_disks
+                                                + k]->bdev, b));
+                printk("]\n");
+
+                zone_size  = conf->strip_zone[j].zone_end - zone_start;
+                printk(KERN_INFO "        zone offset=%llukb "
+                                "device offset=%llukb size=%llukb\n",
+                        (unsigned long long)zone_start>>1,
+                        (unsigned long long)conf->strip_zone[j].dev_start>>1,
+                        (unsigned long long)zone_size>>1);
+                zone_start = conf->strip_zone[j].zone_end;
+        }
+        printk(KERN_INFO "**********************************\n\n");
+}
+
 static int create_strip_zones(mddev_t *mddev)
 {
         int i, c, j, err;
@@ -289,6 +321,7 @@ static int raid0_run(mddev_t *mddev)
         }
 
         blk_queue_merge_bvec(mddev->queue, raid0_mergeable_bvec);
+        dump_zones(mddev);
         return 0;
 }