btrfs: increment device corruption error in case of checksum error

Now that btrfs_io_bio have access to btrfs_device we can safely
increment the device corruption counter on error. There is one notable
exception - repair bios for raid. Since those don't go through the
normal submit_stripe_bio callpath but through raid56_parity_recover thus
repair bios won't have their device set.

Scrub increments the corruption counter for checksum mismatch as well
but does not call this function.

Link: https://lore.kernel.org/linux-btrfs/4857863.FCrPRfMyHP@liv/Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/inode.c

@@ -2815,6 +2815,9 @@ static int check_data_csum(struct inode *inode, struct btrfs_io_bio *io_bio,
 zeroit:
 	btrfs_print_data_csum_error(BTRFS_I(inode), start, csum, csum_expected,
 				    io_bio->mirror_num);
+	if (io_bio->device)
+		btrfs_dev_stat_inc_and_print(io_bio->device,
+					     BTRFS_DEV_STAT_CORRUPTION_ERRS);
 	memset(kaddr + pgoff, 1, len);
 	flush_dcache_page(page);
 	kunmap_atomic(kaddr);