summaryrefslogtreecommitdiffstats
path: root/drivers/md/raid0.c
diff options
context:
space:
mode:
authorAndre Noll <maan@systemlinux.org>2009-06-18 08:45:01 +1000
committerNeilBrown <neilb@suse.de>2009-06-18 08:45:01 +1000
commit9d8f0363623b3da12c43007cf77f5e1a4e8a5964 (patch)
tree0fee53971a397ade209dd36c4f1ed50db6450faf /drivers/md/raid0.c
parentfbb704efb784e2c8418e34dc3013af76bdd58101 (diff)
downloadlinux-9d8f0363623b3da12c43007cf77f5e1a4e8a5964.tar.bz2
md: Make mddev->chunk_size sector-based.
This patch renames the chunk_size field to chunk_sectors with the implied change of semantics. Since is_power_of_2(chunk_size) = is_power_of_2(chunk_sectors << 9) = is_power_of_2(chunk_sectors) these bits don't need an adjustment for the shift. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid0.c')
-rw-r--r--drivers/md/raid0.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 7cd2671cc794..f20b18ff7969 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -238,10 +238,10 @@ static int create_strip_zones(mddev_t *mddev)
* now since we have the hard sector sizes, we can make sure
* chunk size is a multiple of that sector size
*/
- if (mddev->chunk_size % queue_logical_block_size(mddev->queue)) {
+ if ((mddev->chunk_sectors << 9) % queue_logical_block_size(mddev->queue)) {
printk(KERN_ERR "%s chunk_size of %d not valid\n",
mdname(mddev),
- mddev->chunk_size);
+ mddev->chunk_sectors << 9);
goto abort;
}
printk(KERN_INFO "raid0: done.\n");
@@ -270,10 +270,10 @@ static int raid0_mergeable_bvec(struct request_queue *q,
mddev_t *mddev = q->queuedata;
sector_t sector = bvm->bi_sector + get_start_sect(bvm->bi_bdev);
int max;
- unsigned int chunk_sectors = mddev->chunk_size >> 9;
+ unsigned int chunk_sectors = mddev->chunk_sectors;
unsigned int bio_sectors = bvm->bi_size >> 9;
- if (is_power_of_2(mddev->chunk_size))
+ if (is_power_of_2(mddev->chunk_sectors))
max = (chunk_sectors - ((sector & (chunk_sectors-1))
+ bio_sectors)) << 9;
else
@@ -304,11 +304,11 @@ static int raid0_run(mddev_t *mddev)
{
int ret;
- if (mddev->chunk_size == 0) {
+ if (mddev->chunk_sectors == 0) {
printk(KERN_ERR "md/raid0: chunk size must be set.\n");
return -EINVAL;
}
- blk_queue_max_sectors(mddev->queue, mddev->chunk_size >> 9);
+ blk_queue_max_sectors(mddev->queue, mddev->chunk_sectors);
mddev->queue->queue_lock = &mddev->queue->__queue_lock;
ret = create_strip_zones(mddev);
@@ -330,7 +330,8 @@ static int raid0_run(mddev_t *mddev)
* chunksize should be used in that case.
*/
{
- int stripe = mddev->raid_disks * mddev->chunk_size / PAGE_SIZE;
+ int stripe = mddev->raid_disks *
+ (mddev->chunk_sectors << 9) / PAGE_SIZE;
if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
mddev->queue->backing_dev_info.ra_pages = 2* stripe;
}
@@ -381,9 +382,9 @@ static mdk_rdev_t *map_sector(mddev_t *mddev, struct strip_zone *zone,
unsigned int sect_in_chunk;
sector_t chunk;
raid0_conf_t *conf = mddev->private;
- unsigned int chunk_sects = mddev->chunk_size >> 9;
+ unsigned int chunk_sects = mddev->chunk_sectors;
- if (is_power_of_2(mddev->chunk_size)) {
+ if (is_power_of_2(mddev->chunk_sectors)) {
int chunksect_bits = ffz(~chunk_sects);
/* find the sector offset inside the chunk */
sect_in_chunk = sector & (chunk_sects - 1);
@@ -413,7 +414,7 @@ static mdk_rdev_t *map_sector(mddev_t *mddev, struct strip_zone *zone,
static inline int is_io_in_chunk_boundary(mddev_t *mddev,
unsigned int chunk_sects, struct bio *bio)
{
- if (likely(is_power_of_2(mddev->chunk_size))) {
+ if (likely(is_power_of_2(mddev->chunk_sectors))) {
return chunk_sects >= ((bio->bi_sector & (chunk_sects-1))
+ (bio->bi_size >> 9));
} else{
@@ -444,7 +445,7 @@ static int raid0_make_request(struct request_queue *q, struct bio *bio)
bio_sectors(bio));
part_stat_unlock();
- chunk_sects = mddev->chunk_size >> 9;
+ chunk_sects = mddev->chunk_sectors;
if (unlikely(!is_io_in_chunk_boundary(mddev, chunk_sects, bio))) {
sector_t sector = bio->bi_sector;
struct bio_pair *bp;
@@ -455,7 +456,7 @@ static int raid0_make_request(struct request_queue *q, struct bio *bio)
/* This is a one page bio that upper layers
* refuse to split for us, so we need to split it.
*/
- if (likely(is_power_of_2(mddev->chunk_size)))
+ if (likely(is_power_of_2(mddev->chunk_sectors)))
bp = bio_split(bio, chunk_sects - (sector &
(chunk_sects-1)));
else
@@ -519,7 +520,7 @@ static void raid0_status(struct seq_file *seq, mddev_t *mddev)
zone_start = conf->strip_zone[j].zone_end;
}
#endif
- seq_printf(seq, " %dk chunks", mddev->chunk_size/1024);
+ seq_printf(seq, " %dk chunks", mddev->chunk_sectors / 2);
return;
}