[PATCH] dm: store md name

[safe/jmp/linux-2.6] / drivers / md / raid0.c

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index f675725..678f4db 100644 (file)
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -113,21 +113,16 @@ static int create_strip_zones (mddev_t *mddev)
        }
        printk("raid0: FINAL %d zones\n", conf->nr_strip_zones);
 
-       conf->strip_zone = kmalloc(sizeof(struct strip_zone)*
+       conf->strip_zone = kzalloc(sizeof(struct strip_zone)*
                                conf->nr_strip_zones, GFP_KERNEL);
        if (!conf->strip_zone)
                return 1;
-       conf->devlist = kmalloc(sizeof(mdk_rdev_t*)*
+       conf->devlist = kzalloc(sizeof(mdk_rdev_t*)*
                                conf->nr_strip_zones*mddev->raid_disks,
                                GFP_KERNEL);
        if (!conf->devlist)
                return 1;
 
-       memset(conf->strip_zone, 0,sizeof(struct strip_zone)*
-                                  conf->nr_strip_zones);
-       memset(conf->devlist, 0,
-              sizeof(mdk_rdev_t*) * conf->nr_strip_zones * mddev->raid_disks);
-
        /* The first zone must contain all devices, so here we check that
         * there is a proper alignment of slots to devices and find them all
         */
@@ -280,7 +275,11 @@ static int raid0_run (mddev_t *mddev)
        mdk_rdev_t *rdev;
        struct list_head *tmp;
 
-       printk("%s: setting max_sectors to %d, segment boundary to %d\n",
+       if (mddev->chunk_size == 0) {
+               printk(KERN_ERR "md/raid0: non-zero chunk size required.\n");
+               return -EINVAL;
+       }
+       printk(KERN_INFO "%s: setting max_sectors to %d, segment boundary to %d\n",
               mdname(mddev),
               mddev->chunk_size >> 9,
               (mddev->chunk_size>>1)-1);
@@ -307,9 +306,6 @@ static int raid0_run (mddev_t *mddev)
        printk("raid0 : conf->hash_spacing is %llu blocks.\n",
                (unsigned long long)conf->hash_spacing);
        {
-#if __GNUC__ < 3
-               volatile
-#endif
                sector_t s = mddev->array_size;
                sector_t space = conf->hash_spacing;
                int round;
@@ -361,7 +357,7 @@ static int raid0_run (mddev_t *mddev)
         * chunksize should be used in that case.
         */
        {
-               int stripe = mddev->raid_disks * mddev->chunk_size / PAGE_CACHE_SIZE;
+               int stripe = mddev->raid_disks * mddev->chunk_size / PAGE_SIZE;
                if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
                        mddev->queue->backing_dev_info.ra_pages = 2* stripe;
        }
@@ -376,7 +372,7 @@ out_free_conf:
        kfree(conf);
        mddev->private = NULL;
 out:
-       return 1;
+       return -ENOMEM;
 }
 
 static int raid0_stop (mddev_t *mddev)
@@ -403,19 +399,15 @@ static int raid0_make_request (request_queue_t *q, struct bio *bio)
        mdk_rdev_t *tmp_dev;
        unsigned long chunk;
        sector_t block, rsect;
+       const int rw = bio_data_dir(bio);
 
        if (unlikely(bio_barrier(bio))) {
                bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
                return 0;
        }
 
-       if (bio_data_dir(bio)==WRITE) {
-               disk_stat_inc(mddev->gendisk, writes);
-               disk_stat_add(mddev->gendisk, write_sectors, bio_sectors(bio));
-       } else {
-               disk_stat_inc(mddev->gendisk, reads);
-               disk_stat_add(mddev->gendisk, read_sectors, bio_sectors(bio));
-       }
+       disk_stat_inc(mddev->gendisk, ios[rw]);
+       disk_stat_add(mddev->gendisk, sectors[rw], bio_sectors(bio));
 
        chunk_size = mddev->chunk_size >> 10;
        chunk_sects = mddev->chunk_size >> 9;
@@ -444,9 +436,6 @@ static int raid0_make_request (request_queue_t *q, struct bio *bio)
  
 
        {
-#if __GNUC__ < 3
-               volatile
-#endif
                sector_t x = block >> conf->preshift;
                sector_div(x, (u32)conf->hash_spacing);
                zone = conf->hash_table[x];
@@ -516,9 +505,10 @@ static void raid0_status (struct seq_file *seq, mddev_t *mddev)
        return;
 }
 
-static mdk_personality_t raid0_personality=
+static struct mdk_personality raid0_personality=
 {
        .name           = "raid0",
+       .level          = 0,
        .owner          = THIS_MODULE,
        .make_request   = raid0_make_request,
        .run            = raid0_run,
@@ -528,15 +518,17 @@ static mdk_personality_t raid0_personality=
 
 static int __init raid0_init (void)
 {
-       return register_md_personality (RAID0, &raid0_personality);
+       return register_md_personality (&raid0_personality);
 }
 
 static void raid0_exit (void)
 {
-       unregister_md_personality (RAID0);
+       unregister_md_personality (&raid0_personality);
 }
 
 module_init(raid0_init);
 module_exit(raid0_exit);
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("md-personality-2"); /* RAID0 */
+MODULE_ALIAS("md-raid0");
+MODULE_ALIAS("md-level-0");