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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

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Pull MD update from Shaohua Li:

 - fixed deadlock in MD suspend and a potential bug in bio allocation
   (Neil Brown)

 - fixed signal issue (Mikulas Patocka)

 - fixed typo in FailFast test (Guoqing Jiang)

 - other trival fixes

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  MD: fix sleep in atomic
  MD: fix a null dereference
  md: use a separate bio_set for synchronous IO.
  md: change the initialization value for a spare device spot to MD_DISK_ROLE_SPARE
  md/raid1: remove unused bio in sync_request_write
  md/raid10: fix FailFast test for wrong device
  md: don't use flush_signals in userspace processes
  md: fix deadlock between mddev_suspend() and md_write_start()
This commit is contained in:
Linus Torvalds
2017-07-08 12:50:18 -07:00
parent 43d012099f 7184ef8bab
commit 026d15f6b9
9 changed files with 92 additions and 47 deletions
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20
drivers/md/raid1.c
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@@ -1321,7 +1321,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
* Continue immediately if no resync is active currently.
*/
md_write_start(mddev, bio); /* wait on superblock update early */
if ((bio_end_sector(bio) > mddev->suspend_lo &&
bio->bi_iter.bi_sector < mddev->suspend_hi) ||
@@ -1335,7 +1334,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
*/
DEFINE_WAIT(w);
for (;;) {
flush_signals(current);
sigset_t full, old;
prepare_to_wait(&conf->wait_barrier,
&w, TASK_INTERRUPTIBLE);
if (bio_end_sector(bio) <= mddev->suspend_lo ||
@@ -1345,7 +1344,10 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
bio->bi_iter.bi_sector,
bio_end_sector(bio))))
break;
sigfillset(&full);
sigprocmask(SIG_BLOCK, &full, &old);
schedule();
sigprocmask(SIG_SETMASK, &old, NULL);
}
finish_wait(&conf->wait_barrier, &w);
}
@@ -1550,13 +1552,13 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
wake_up(&conf->wait_barrier);
}
static void raid1_make_request(struct mddev *mddev, struct bio *bio)
static bool raid1_make_request(struct mddev *mddev, struct bio *bio)
{
sector_t sectors;
if (unlikely(bio->bi_opf & REQ_PREFLUSH)) {
md_flush_request(mddev, bio);
return;
return true;
}
/*
@@ -1571,8 +1573,12 @@ static void raid1_make_request(struct mddev *mddev, struct bio *bio)
if (bio_data_dir(bio) == READ)
raid1_read_request(mddev, bio, sectors, NULL);
else
else {
if (!md_write_start(mddev,bio))
return false;
raid1_write_request(mddev, bio, sectors);
}
return true;
}
static void raid1_status(struct seq_file *seq, struct mddev *mddev)
@@ -2165,9 +2171,7 @@ static void sync_request_write(struct mddev *mddev, struct r1bio *r1_bio)
struct r1conf *conf = mddev->private;
int i;
int disks = conf->raid_disks * 2;
struct bio *bio, *wbio;
bio = r1_bio->bios[r1_bio->read_disk];
struct bio *wbio;
if (!test_bit(R1BIO_Uptodate, &r1_bio->state))
/* ouch - failed to read all of that. */