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Merge tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 

Pull MD fixes from Shaohua Li:
 "There are several bug fixes queued:

   - fix raid5-cache recovery bugs

   - fix discard IO error handling for raid1/10

   - fix array sync writes bogus position to superblock

   - fix IO error handling for raid array with external metadata"

* tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md: be careful not lot leak internal curr_resync value into metadata. -- (all)
  raid1: handle read error also in readonly mode
  raid5-cache: correct condition for empty metadata write
  md: report 'write_pending' state when array in sync
  md/raid5: write an empty meta-block when creating log super-block
  md/raid5: initialize next_checkpoint field before use
  RAID10: ignore discard error
  RAID1: ignore discard error
This commit is contained in:
Linus Torvalds 2016-11-05 11:34:07 -07:00
parent e12d8d512f 1217e1d199
commit 6c286e812d
4 changed files with 30 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/md/md.c
View File

@ -3887,10 +3887,10 @@ array_state_show(struct mddev *mddev, char *page)
st = read_auto;
break;
case 0:
if (mddev->in_sync)
st = clean;
else if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
st = write_pending;
else if (mddev->in_sync)
st = clean;
else if (mddev->safemode)
st = active_idle;
else
@ -8144,14 +8144,14 @@ void md_do_sync(struct md_thread *thread)
if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
!test_bit(MD_RECOVERY_INTR, &mddev->recovery) &&
mddev->curr_resync > 2) {
mddev->curr_resync > 3) {
mddev->curr_resync_completed = mddev->curr_resync;
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
}
mddev->pers->sync_request(mddev, max_sectors, &skipped);
if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
mddev->curr_resync > 2) {
mddev->curr_resync > 3) {
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
if (mddev->curr_resync >= mddev->recovery_cp) {

26
drivers/md/raid1.c
View File

@ -403,11 +403,14 @@ static void raid1_end_write_request(struct bio *bio)
struct bio *to_put = NULL;
int mirror = find_bio_disk(r1_bio, bio);
struct md_rdev *rdev = conf->mirrors[mirror].rdev;
bool discard_error;
discard_error = bio->bi_error && bio_op(bio) == REQ_OP_DISCARD;
/*
* 'one mirror IO has finished' event handler:
*/
if (bio->bi_error) {
if (bio->bi_error && !discard_error) {
set_bit(WriteErrorSeen, &rdev->flags);
if (!test_and_set_bit(WantReplacement, &rdev->flags))
set_bit(MD_RECOVERY_NEEDED, &
@ -444,7 +447,7 @@ static void raid1_end_write_request(struct bio *bio)
/* Maybe we can clear some bad blocks. */
if (is_badblock(rdev, r1_bio->sector, r1_bio->sectors,
&first_bad, &bad_sectors)) {
&first_bad, &bad_sectors) && !discard_error) {
r1_bio->bios[mirror] = IO_MADE_GOOD;
set_bit(R1BIO_MadeGood, &r1_bio->state);
}
@ -2294,17 +2297,23 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
* This is all done synchronously while the array is
* frozen
*/
bio = r1_bio->bios[r1_bio->read_disk];
bdevname(bio->bi_bdev, b);
bio_put(bio);
r1_bio->bios[r1_bio->read_disk] = NULL;
if (mddev->ro == 0) {
freeze_array(conf, 1);
fix_read_error(conf, r1_bio->read_disk,
r1_bio->sector, r1_bio->sectors);
unfreeze_array(conf);
} else
md_error(mddev, conf->mirrors[r1_bio->read_disk].rdev);
} else {
r1_bio->bios[r1_bio->read_disk] = IO_BLOCKED;
}
rdev_dec_pending(conf->mirrors[r1_bio->read_disk].rdev, conf->mddev);
bio = r1_bio->bios[r1_bio->read_disk];
bdevname(bio->bi_bdev, b);
read_more:
disk = read_balance(conf, r1_bio, &max_sectors);
if (disk == -1) {
@ -2315,11 +2324,6 @@ read_more:
} else {
const unsigned long do_sync
= r1_bio->master_bio->bi_opf & REQ_SYNC;
if (bio) {
r1_bio->bios[r1_bio->read_disk] =
mddev->ro ? IO_BLOCKED : NULL;
bio_put(bio);
}
r1_bio->read_disk = disk;
bio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev);
bio_trim(bio, r1_bio->sector - bio->bi_iter.bi_sector,

7
drivers/md/raid10.c
View File

@ -447,6 +447,9 @@ static void raid10_end_write_request(struct bio *bio)
struct r10conf *conf = r10_bio->mddev->private;
int slot, repl;
struct md_rdev *rdev = NULL;
bool discard_error;
discard_error = bio->bi_error && bio_op(bio) == REQ_OP_DISCARD;
dev = find_bio_disk(conf, r10_bio, bio, &slot, &repl);
@ -460,7 +463,7 @@ static void raid10_end_write_request(struct bio *bio)
/*
* this branch is our 'one mirror IO has finished' event handler:
*/
if (bio->bi_error) {
if (bio->bi_error && !discard_error) {
if (repl)
/* Never record new bad blocks to replacement,
* just fail it.
@ -503,7 +506,7 @@ static void raid10_end_write_request(struct bio *bio)
if (is_badblock(rdev,
r10_bio->devs[slot].addr,
r10_bio->sectors,
&first_bad, &bad_sectors)) {
&first_bad, &bad_sectors) && !discard_error) {
bio_put(bio);
if (repl)
r10_bio->devs[slot].repl_bio = IO_MADE_GOOD;

6
drivers/md/raid5-cache.c
View File

@ -1087,7 +1087,7 @@ static int r5l_recovery_log(struct r5l_log *log)
* 1's seq + 10 and let superblock points to meta2. The same recovery will
* not think meta 3 is a valid meta, because its seq doesn't match
*/
if (ctx.seq > log->last_cp_seq + 1) {
if (ctx.seq > log->last_cp_seq) {
int ret;
ret = r5l_log_write_empty_meta_block(log, ctx.pos, ctx.seq + 10);
@ -1096,6 +1096,8 @@ static int r5l_recovery_log(struct r5l_log *log)
log->seq = ctx.seq + 11;
log->log_start = r5l_ring_add(log, ctx.pos, BLOCK_SECTORS);
r5l_write_super(log, ctx.pos);
log->last_checkpoint = ctx.pos;
log->next_checkpoint = ctx.pos;
} else {
log->log_start = ctx.pos;
log->seq = ctx.seq;
@ -1154,6 +1156,7 @@ create:
if (create_super) {
log->last_cp_seq = prandom_u32();
cp = 0;
r5l_log_write_empty_meta_block(log, cp, log->last_cp_seq);
/*
* Make sure super points to correct address. Log might have
* data very soon. If super hasn't correct log tail address,
@ -1168,6 +1171,7 @@ create:
if (log->max_free_space > RECLAIM_MAX_FREE_SPACE)
log->max_free_space = RECLAIM_MAX_FREE_SPACE;
log->last_checkpoint = cp;
log->next_checkpoint = cp;
__free_page(page);