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path: root/drivers/md/raid0.c
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Diffstat (limited to 'drivers/md/raid0.c')
-rw-r--r--drivers/md/raid0.c129
1 files changed, 79 insertions, 50 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 6f31f5596e0..407a99e46f6 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -88,6 +88,7 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
char b[BDEVNAME_SIZE];
char b2[BDEVNAME_SIZE];
struct r0conf *conf = kzalloc(sizeof(*conf), GFP_KERNEL);
+ bool discard_supported = false;
if (!conf)
return -ENOMEM;
@@ -174,7 +175,13 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
rdev1->new_raid_disk = j;
}
- if (j < 0 || j >= mddev->raid_disks) {
+ if (j < 0) {
+ printk(KERN_ERR
+ "md/raid0:%s: remove inactive devices before converting to RAID0\n",
+ mdname(mddev));
+ goto abort;
+ }
+ if (j >= mddev->raid_disks) {
printk(KERN_ERR "md/raid0:%s: bad disk number %d - "
"aborting!\n", mdname(mddev), j);
goto abort;
@@ -195,6 +202,9 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
if (!smallest || (rdev1->sectors < smallest->sectors))
smallest = rdev1;
cnt++;
+
+ if (blk_queue_discard(bdev_get_queue(rdev1->bdev)))
+ discard_supported = true;
}
if (cnt != mddev->raid_disks) {
printk(KERN_ERR "md/raid0:%s: too few disks (%d of %d) - "
@@ -272,6 +282,11 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
blk_queue_io_opt(mddev->queue,
(mddev->chunk_sectors << 9) * mddev->raid_disks);
+ if (!discard_supported)
+ queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
+ else
+ queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
+
pr_debug("md/raid0:%s: done.\n", mdname(mddev));
*private_conf = conf;
@@ -280,7 +295,7 @@ abort:
kfree(conf->strip_zone);
kfree(conf->devlist);
kfree(conf);
- *private_conf = NULL;
+ *private_conf = ERR_PTR(err);
return err;
}
@@ -402,11 +417,14 @@ static sector_t raid0_size(struct mddev *mddev, sector_t sectors, int raid_disks
"%s does not support generic reshape\n", __func__);
rdev_for_each(rdev, mddev)
- array_sectors += rdev->sectors;
+ array_sectors += (rdev->sectors &
+ ~(sector_t)(mddev->chunk_sectors-1));
return array_sectors;
}
+static int raid0_stop(struct mddev *mddev);
+
static int raid0_run(struct mddev *mddev)
{
struct r0conf *conf;
@@ -420,6 +438,8 @@ static int raid0_run(struct mddev *mddev)
if (md_check_no_bitmap(mddev))
return -EINVAL;
blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
+ blk_queue_max_write_same_sectors(mddev->queue, mddev->chunk_sectors);
+ blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors);
/* if private is not null, we are here after takeover */
if (mddev->private == NULL) {
@@ -454,7 +474,12 @@ static int raid0_run(struct mddev *mddev)
blk_queue_merge_bvec(mddev->queue, raid0_mergeable_bvec);
dump_zones(mddev);
- return md_integrity_register(mddev);
+
+ ret = md_integrity_register(mddev);
+ if (ret)
+ raid0_stop(mddev);
+
+ return ret;
}
static int raid0_stop(struct mddev *mddev)
@@ -476,69 +501,56 @@ static inline int is_io_in_chunk_boundary(struct mddev *mddev,
unsigned int chunk_sects, struct bio *bio)
{
if (likely(is_power_of_2(chunk_sects))) {
- return chunk_sects >= ((bio->bi_sector & (chunk_sects-1))
- + (bio->bi_size >> 9));
+ return chunk_sects >=
+ ((bio->bi_iter.bi_sector & (chunk_sects-1))
+ + bio_sectors(bio));
} else{
- sector_t sector = bio->bi_sector;
+ sector_t sector = bio->bi_iter.bi_sector;
return chunk_sects >= (sector_div(sector, chunk_sects)
- + (bio->bi_size >> 9));
+ + bio_sectors(bio));
}
}
static void raid0_make_request(struct mddev *mddev, struct bio *bio)
{
- unsigned int chunk_sects;
- sector_t sector_offset;
struct strip_zone *zone;
struct md_rdev *tmp_dev;
+ struct bio *split;
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
return;
}
- 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;
- /* Sanity check -- queue functions should prevent this happening */
- if (bio->bi_vcnt != 1 ||
- bio->bi_idx != 0)
- goto bad_map;
- /* 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(chunk_sects)))
- bp = bio_split(bio, chunk_sects - (sector &
- (chunk_sects-1)));
- else
- bp = bio_split(bio, chunk_sects -
- sector_div(sector, chunk_sects));
- raid0_make_request(mddev, &bp->bio1);
- raid0_make_request(mddev, &bp->bio2);
- bio_pair_release(bp);
- return;
- }
+ do {
+ sector_t sector = bio->bi_iter.bi_sector;
+ unsigned chunk_sects = mddev->chunk_sectors;
- sector_offset = bio->bi_sector;
- zone = find_zone(mddev->private, &sector_offset);
- tmp_dev = map_sector(mddev, zone, bio->bi_sector,
- &sector_offset);
- bio->bi_bdev = tmp_dev->bdev;
- bio->bi_sector = sector_offset + zone->dev_start +
- tmp_dev->data_offset;
-
- generic_make_request(bio);
- return;
+ unsigned sectors = chunk_sects -
+ (likely(is_power_of_2(chunk_sects))
+ ? (sector & (chunk_sects-1))
+ : sector_div(sector, chunk_sects));
-bad_map:
- printk("md/raid0:%s: make_request bug: can't convert block across chunks"
- " or bigger than %dk %llu %d\n",
- mdname(mddev), chunk_sects / 2,
- (unsigned long long)bio->bi_sector, bio->bi_size >> 10);
+ if (sectors < bio_sectors(bio)) {
+ split = bio_split(bio, sectors, GFP_NOIO, fs_bio_set);
+ bio_chain(split, bio);
+ } else {
+ split = bio;
+ }
- bio_io_error(bio);
- return;
+ zone = find_zone(mddev->private, &sector);
+ tmp_dev = map_sector(mddev, zone, sector, &sector);
+ split->bi_bdev = tmp_dev->bdev;
+ split->bi_iter.bi_sector = sector + zone->dev_start +
+ tmp_dev->data_offset;
+
+ if (unlikely((split->bi_rw & REQ_DISCARD) &&
+ !blk_queue_discard(bdev_get_queue(split->bi_bdev)))) {
+ /* Just ignore it */
+ bio_endio(split, 0);
+ } else
+ generic_make_request(split);
+ } while (split != bio);
}
static void raid0_status(struct seq_file *seq, struct mddev *mddev)
@@ -566,6 +578,7 @@ static void *raid0_takeover_raid45(struct mddev *mddev)
mdname(mddev));
return ERR_PTR(-EINVAL);
}
+ rdev->sectors = mddev->dev_sectors;
}
/* Set new parameters */
@@ -625,6 +638,7 @@ static void *raid0_takeover_raid10(struct mddev *mddev)
static void *raid0_takeover_raid1(struct mddev *mddev)
{
struct r0conf *priv_conf;
+ int chunksect;
/* Check layout:
* - (N - 1) mirror drives must be already faulty
@@ -635,10 +649,25 @@ static void *raid0_takeover_raid1(struct mddev *mddev)
return ERR_PTR(-EINVAL);
}
+ /*
+ * a raid1 doesn't have the notion of chunk size, so
+ * figure out the largest suitable size we can use.
+ */
+ chunksect = 64 * 2; /* 64K by default */
+
+ /* The array must be an exact multiple of chunksize */
+ while (chunksect && (mddev->array_sectors & (chunksect - 1)))
+ chunksect >>= 1;
+
+ if ((chunksect << 9) < PAGE_SIZE)
+ /* array size does not allow a suitable chunk size */
+ return ERR_PTR(-EINVAL);
+
/* Set new parameters */
mddev->new_level = 0;
mddev->new_layout = 0;
- mddev->new_chunk_sectors = 128; /* by default set chunk size to 64k */
+ mddev->new_chunk_sectors = chunksect;
+ mddev->chunk_sectors = chunksect;
mddev->delta_disks = 1 - mddev->raid_disks;
mddev->raid_disks = 1;
/* make sure it will be not marked as dirty */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 14:57:16 +0000