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| author | Shaohua Li <shli@fb.com> | 2015-09-18 10:20:13 -0700 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-10-02 17:23:43 +1000 |
| commit | ebda780bce8d58ec0abab157397c9e099c41a05f (patch) | |
| tree | bb3995ca492ded73273329f69791cf814b5dfdbe | |
| parent | 88724bfa68be792c1487d759e87568c36ac1a1cc (diff) | |
| download | linux-stable-ebda780bce8d58ec0abab157397c9e099c41a05f.tar.gz linux-stable-ebda780bce8d58ec0abab157397c9e099c41a05f.tar.bz2 linux-stable-ebda780bce8d58ec0abab157397c9e099c41a05f.zip | |
raid5: update analysis state for failed stripe
handle_failed_stripe() makes the stripe fail, eg, all IO will return
with a failure, but it doesn't update stripe_head_state. Later
handle_stripe() has special handling for raid6 for handle_stripe_fill().
That check before handle_stripe_fill() doesn't skip the failed stripe
and we get a kernel crash in need_this_block. This patch clear the
analysis state to make sure no functions wrongly called after
handle_failed_stripe()
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
| -rw-r--r-- | drivers/md/raid5.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 15ef2c641b2b..2105e5f1fd31 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3150,6 +3150,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh, spin_unlock_irq(&sh->stripe_lock); if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags)) wake_up(&conf->wait_for_overlap); + if (bi) + s->to_read--; while (bi && bi->bi_iter.bi_sector < sh->dev[i].sector + STRIPE_SECTORS) { struct bio *nextbi = @@ -3169,6 +3171,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh, */ clear_bit(R5_LOCKED, &sh->dev[i].flags); } + s->to_write = 0; + s->written = 0; if (test_and_clear_bit(STRIPE_FULL_WRITE, &sh->state)) if (atomic_dec_and_test(&conf->pending_full_writes)) |