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authorShaohua Li <shli@fb.com>2017-08-24 17:50:40 -0700
committerShaohua Li <shli@fb.com>2017-08-25 10:21:44 -0700
commit208410b546207cfc4c832635fa46419cfa86b4cd (patch)
tree39b87caad9074f3dc4748b109fa216568fad2d99 /drivers/md/raid10.c
parent9c72a18e46ebe0f09484cce8ebf847abdab58498 (diff)
md/raid1/10: reset bio allocated from mempool
Data allocated from mempool doesn't always get initialized, this happens when the data is reused instead of fresh allocation. In the raid1/10 case, we must reinitialize the bios. Reported-by: Jonathan G. Underwood <jonathan.underwood@gmail.com> Fixes: f0250618361d(md: raid10: don't use bio's vec table to manage resync pages) Fixes: 98d30c5812c3(md: raid1: don't use bio's vec table to manage resync pages) Cc: stable@vger.kernel.org (4.12+) Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c35
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index f55d4cc085f6..d51ac02e98ef 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2798,6 +2798,35 @@ static int init_resync(struct r10conf *conf)
return 0;
}
+static struct r10bio *raid10_alloc_init_r10buf(struct r10conf *conf)
+{
+ struct r10bio *r10bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ struct rsync_pages *rp;
+ struct bio *bio;
+ int nalloc;
+ int i;
+
+ if (test_bit(MD_RECOVERY_SYNC, &conf->mddev->recovery) ||
+ test_bit(MD_RECOVERY_RESHAPE, &conf->mddev->recovery))
+ nalloc = conf->copies; /* resync */
+ else
+ nalloc = 2; /* recovery */
+
+ for (i = 0; i < nalloc; i++) {
+ bio = r10bio->devs[i].bio;
+ rp = bio->bi_private;
+ bio_reset(bio);
+ bio->bi_private = rp;
+ bio = r10bio->devs[i].repl_bio;
+ if (bio) {
+ rp = bio->bi_private;
+ bio_reset(bio);
+ bio->bi_private = rp;
+ }
+ }
+ return r10bio;
+}
+
/*
* perform a "sync" on one "block"
*
@@ -3027,7 +3056,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
atomic_inc(&mreplace->nr_pending);
rcu_read_unlock();
- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;
raise_barrier(conf, rb2 != NULL);
atomic_set(&r10_bio->remaining, 0);
@@ -3236,7 +3265,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
}
if (sync_blocks < max_sync)
max_sync = sync_blocks;
- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;
r10_bio->mddev = mddev;
@@ -4360,7 +4389,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
read_more:
/* Now schedule reads for blocks from sector_nr to last */
- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;
raise_barrier(conf, sectors_done != 0);
atomic_set(&r10_bio->remaining, 0);