diff options
| author | Shaohua Li <shli@fb.com> | 2017-08-24 17:50:40 -0700 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-08-25 10:21:44 -0700 |
| commit | 208410b546207cfc4c832635fa46419cfa86b4cd (patch) | |
| tree | 39b87caad9074f3dc4748b109fa216568fad2d99 /drivers/md/raid10.c | |
| parent | 9c72a18e46ebe0f09484cce8ebf847abdab58498 (diff) | |
| download | linux-stable-208410b546207cfc4c832635fa46419cfa86b4cd.tar.gz linux-stable-208410b546207cfc4c832635fa46419cfa86b4cd.tar.bz2 linux-stable-208410b546207cfc4c832635fa46419cfa86b4cd.zip | |
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.c | 35 |
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); |