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Commit 597a60fa authored by Stefan Behrens's avatar Stefan Behrens Committed by Chris Mason
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Btrfs: don't count I/O statistic read errors for missing devices 



It is normal behaviour of the low level btrfs function btrfs_map_bio()
to complete a bio with -EIO if the device is missing, instead of just
preventing the bio creation in an earlier step.
This used to cause I/O statistic read error increments and annoying
printk_ratelimited messages. This commit fixes the issue.

Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
Reported-by: default avatarCarey Underwood <cwillu@cwillu.com>
parent d42244a0

fs/btrfs/volumes.c

+12 −10
Original line number Diff line number Diff line
@@ -4061,6 +4061,7 @@ static void btrfs_end_bio(struct bio *bio, int err) 


			BUG_ON(stripe_index >= bbio->num_stripes);

			dev = bbio->stripes[stripe_index].dev;

			if (dev->bdev) {

				if (bio->bi_rw & WRITE)

					btrfs_dev_stat_inc(dev,

						BTRFS_DEV_STAT_WRITE_ERRS);
@@ -4073,6 +4074,7 @@ static void btrfs_end_bio(struct bio *bio, int err) 
				btrfs_dev_stat_print_on_error(dev);

			}

		}

	}



	if (bio == bbio->orig_bio)

		is_orig_bio = 1;