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>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f066cad..0fa4f70 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/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);