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Revert "md/raid10: extend r10bio devs to raid disks"

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This reverts commit 8650a88901.

Matthew Ruffell reported data corruption in raid10 due to the changes
in discard handling [1]. Revert these changes before we find a proper fix.

[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907262/
Cc: Matthew Ruffell <matthew.ruffell@canonical.com>
Cc: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
This commit is contained in:
Song Liu 2020-12-09 11:44:20 -08:00
parent 4e2c6567ef
commit 17c28c2a06
1 changed files with 5 additions and 4 deletions
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9
drivers/md/raid10.c
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@ -91,7 +91,7 @@ static inline struct r10bio *get_resync_r10bio(struct bio *bio)
static void * r10bio_pool_alloc(gfp_t gfp_flags, void *data)
{
struct r10conf *conf = data;
int size = offsetof(struct r10bio, devs[conf->geo.raid_disks]);
int size = offsetof(struct r10bio, devs[conf->copies]);
/* allocate a r10bio with room for raid_disks entries in the
* bios array */
@ -238,7 +238,7 @@ static void put_all_bios(struct r10conf *conf, struct r10bio *r10_bio)
{
int i;
for (i = 0; i < conf->geo.raid_disks; i++) {
for (i = 0; i < conf->copies; i++) {
struct bio **bio = & r10_bio->devs[i].bio;
if (!BIO_SPECIAL(*bio))
bio_put(*bio);
@ -327,7 +327,7 @@ static int find_bio_disk(struct r10conf *conf, struct r10bio *r10_bio,
int slot;
int repl = 0;
for (slot = 0; slot < conf->geo.raid_disks; slot++) {
for (slot = 0; slot < conf->copies; slot++) {
if (r10_bio->devs[slot].bio == bio)
break;
if (r10_bio->devs[slot].repl_bio == bio) {
@ -336,6 +336,7 @@ static int find_bio_disk(struct r10conf *conf, struct r10bio *r10_bio,
}
}
BUG_ON(slot == conf->copies);
update_head_pos(slot, r10_bio);
if (slotp)
@ -1492,7 +1493,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors)
r10_bio->mddev = mddev;
r10_bio->sector = bio->bi_iter.bi_sector;
r10_bio->state = 0;
memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) * conf->geo.raid_disks);
memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) * conf->copies);
if (bio_data_dir(bio) == READ)
raid10_read_request(mddev, bio, r10_bio);