Commit f1cad2b6 authored by Shaohua Li's avatar Shaohua Li Committed by NeilBrown

md: linear supports TRIM

This makes md linear support TRIM.
Signed-off-by: default avatarShaohua Li <shli@fusionio.com>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent bc78c573
...@@ -138,6 +138,7 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks) ...@@ -138,6 +138,7 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
struct linear_conf *conf; struct linear_conf *conf;
struct md_rdev *rdev; struct md_rdev *rdev;
int i, cnt; int i, cnt;
bool discard_supported = false;
conf = kzalloc (sizeof (*conf) + raid_disks*sizeof(struct dev_info), conf = kzalloc (sizeof (*conf) + raid_disks*sizeof(struct dev_info),
GFP_KERNEL); GFP_KERNEL);
...@@ -171,6 +172,8 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks) ...@@ -171,6 +172,8 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
conf->array_sectors += rdev->sectors; conf->array_sectors += rdev->sectors;
cnt++; cnt++;
if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
discard_supported = true;
} }
if (cnt != raid_disks) { if (cnt != raid_disks) {
printk(KERN_ERR "md/linear:%s: not enough drives present. Aborting!\n", printk(KERN_ERR "md/linear:%s: not enough drives present. Aborting!\n",
...@@ -178,6 +181,11 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks) ...@@ -178,6 +181,11 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
goto out; goto out;
} }
if (!discard_supported)
queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
else
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
/* /*
* Here we calculate the device offsets. * Here we calculate the device offsets.
*/ */
...@@ -331,6 +339,14 @@ static void linear_make_request(struct mddev *mddev, struct bio *bio) ...@@ -331,6 +339,14 @@ static void linear_make_request(struct mddev *mddev, struct bio *bio)
bio->bi_sector = bio->bi_sector - start_sector bio->bi_sector = bio->bi_sector - start_sector
+ tmp_dev->rdev->data_offset; + tmp_dev->rdev->data_offset;
rcu_read_unlock(); rcu_read_unlock();
if (unlikely((bio->bi_rw & REQ_DISCARD) &&
!blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) {
/* Just ignore it */
bio_endio(bio, 0);
return;
}
generic_make_request(bio); generic_make_request(bio);
} }
......
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