#define MD_DRIVER
#define MD_PERSONALITY
-static void raid0_unplug(request_queue_t *q)
+static void raid0_unplug(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
raid0_conf_t *conf = mddev_to_conf(mddev);
int i;
for (i=0; i<mddev->raid_disks; i++) {
- request_queue_t *r_queue = bdev_get_queue(devlist[i]->bdev);
+ struct request_queue *r_queue = bdev_get_queue(devlist[i]->bdev);
if (r_queue->unplug_fn)
r_queue->unplug_fn(r_queue);
}
}
-static int raid0_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid0_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
struct block_device *bdev = devlist[i]->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
return ret;
}
+static int raid0_congested(void *data, int bits)
+{
+ mddev_t *mddev = data;
+ raid0_conf_t *conf = mddev_to_conf(mddev);
+ mdk_rdev_t **devlist = conf->strip_zone[0].dev;
+ int i, ret = 0;
+
+ for (i = 0; i < mddev->raid_disks && !ret ; i++) {
+ struct request_queue *q = bdev_get_queue(devlist[i]->bdev);
+
+ ret |= bdi_congested(&q->backing_dev_info, bits);
+ }
+ return ret;
+}
+
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
*/
mddev->queue->unplug_fn = raid0_unplug;
mddev->queue->issue_flush_fn = raid0_issue_flush;
+ mddev->queue->backing_dev_info.congested_fn = raid0_congested;
+ mddev->queue->backing_dev_info.congested_data = mddev;
printk("raid0: done.\n");
return 0;
*
* Return amount of bytes we can accept at this offset
*/
-static int raid0_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int raid0_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
{
mddev_t *mddev = q->queuedata;
sector_t sector = bio->bi_sector + get_start_sect(bio->bi_bdev);
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);
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;
goto out_free_conf;
size = conf->strip_zone[cur].size;
- for (i=0; i< nb_zone; i++) {
- conf->hash_table[i] = conf->strip_zone + cur;
+ conf->hash_table[0] = conf->strip_zone + cur;
+ for (i=1; i< nb_zone; i++) {
while (size <= conf->hash_spacing) {
cur++;
size += conf->strip_zone[cur].size;
}
size -= conf->hash_spacing;
+ conf->hash_table[i] = conf->strip_zone + cur;
}
if (conf->preshift) {
conf->hash_spacing >>= conf->preshift;
* 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;
}
kfree(conf);
mddev->private = NULL;
out:
- return 1;
+ return -ENOMEM;
}
static int raid0_stop (mddev_t *mddev)
return 0;
}
-static int raid0_make_request (request_queue_t *q, struct bio *bio)
+static int raid0_make_request (struct request_queue *q, struct bio *bio)
{
mddev_t *mddev = q->queuedata;
unsigned int sect_in_chunk, chunksize_bits, chunk_size, chunk_sects;
raid0_conf_t *conf = mddev_to_conf(mddev);
struct strip_zone *zone;
mdk_rdev_t *tmp_dev;
- unsigned long chunk;
+ sector_t 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;
{
-#if __GNUC__ < 3
- volatile
-#endif
sector_t x = block >> conf->preshift;
sector_div(x, (u32)conf->hash_spacing);
zone = conf->hash_table[x];
sector_div(x, zone->nb_dev);
chunk = x;
- BUG_ON(x != (sector_t)chunk);
x = block >> chunksize_bits;
tmp_dev = zone->dev[sector_div(x, zone->nb_dev)];
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,
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");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff