xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/md/raid5.c
View File

@@ -5479,7 +5479,6 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
last_sector = bi->bi_iter.bi_sector + (bi->bi_iter.bi_size>>9);
bi->bi_next = NULL;
md_write_start(mddev, bi);
stripe_sectors = conf->chunk_sectors *
(conf->raid_disks - conf->max_degraded);
@@ -5549,11 +5548,10 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
release_stripe_plug(mddev, sh);
}
md_write_end(mddev);
bio_endio(bi);
}
static void raid5_make_request(struct mddev *mddev, struct bio * bi)
static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
{
struct r5conf *conf = mddev->private;
int dd_idx;
@@ -5569,10 +5567,10 @@ static void raid5_make_request(struct mddev *mddev, struct bio * bi)
int ret = r5l_handle_flush_request(conf->log, bi);
if (ret == 0)
return;
return true;
if (ret == -ENODEV) {
md_flush_request(mddev, bi);
return;
return true;
}
/* ret == -EAGAIN, fallback */
/*
@@ -5582,6 +5580,8 @@ static void raid5_make_request(struct mddev *mddev, struct bio * bi)
do_flush = bi->bi_opf & REQ_PREFLUSH;
}
if (!md_write_start(mddev, bi))
return false;
/*
* If array is degraded, better not do chunk aligned read because
* later we might have to read it again in order to reconstruct
@@ -5591,18 +5591,18 @@ static void raid5_make_request(struct mddev *mddev, struct bio * bi)
mddev->reshape_position == MaxSector) {
bi = chunk_aligned_read(mddev, bi);
if (!bi)
return;
return true;
}
if (unlikely(bio_op(bi) == REQ_OP_DISCARD)) {
make_discard_request(mddev, bi);
return;
md_write_end(mddev);
return true;
}
logical_sector = bi->bi_iter.bi_sector & ~((sector_t)STRIPE_SECTORS-1);
last_sector = bio_end_sector(bi);
bi->bi_next = NULL;
md_write_start(mddev, bi);
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
for (;logical_sector < last_sector; logical_sector += STRIPE_SECTORS) {
@@ -5693,12 +5693,15 @@ static void raid5_make_request(struct mddev *mddev, struct bio * bi)
* userspace, we want an interruptible
* wait.
*/
flush_signals(current);
prepare_to_wait(&conf->wait_for_overlap,
&w, TASK_INTERRUPTIBLE);
if (logical_sector >= mddev->suspend_lo &&
logical_sector < mddev->suspend_hi) {
sigset_t full, old;
sigfillset(&full);
sigprocmask(SIG_BLOCK, &full, &old);
schedule();
sigprocmask(SIG_SETMASK, &old, NULL);
do_prepare = true;
}
goto retry;
@@ -5740,6 +5743,7 @@ static void raid5_make_request(struct mddev *mddev, struct bio * bi)
if (rw == WRITE)
md_write_end(mddev);
bio_endio(bi);
return true;
}
static sector_t raid5_size(struct mddev *mddev, sector_t sectors, int raid_disks);