Commit 597a60fa authored Jun 14, 2012 by Stefan Behrens Committed by Chris Mason Jul 02, 2012

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: Stefan Behrens <sbehrens@giantdisaster.de>
Reported-by: Carey 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;

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