Btrfs: add device counters for detected IO and checksum errors

[linux-2.6-block.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 69a527c7a0b3d9e560d99a567b9e0ef4f6595ffe..b3692c1373aa5e803882dbb8f54163865040cdeb 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1913,6 +1913,7 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
        if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
                /* try to remap that extent elsewhere? */
                bio_put(bio);
+               btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS);
                return -EIO;
        }
 
@@ -2327,10 +2328,23 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
                if (uptodate && tree->ops && tree->ops->readpage_end_io_hook) {
                        ret = tree->ops->readpage_end_io_hook(page, start, end,
                                                              state, mirror);
-                       if (ret)
+                       if (ret) {
+                               /* no IO indicated but software detected errors
+                                * in the block, either checksum errors or
+                                * issues with the contents */
+                               struct btrfs_root *root =
+                                       BTRFS_I(page->mapping->host)->root;
+                               struct btrfs_device *device;
+
                                uptodate = 0;
-                       else
+                               device = btrfs_find_device_for_logical(
+                                               root, start, mirror);
+                               if (device)
+                                       btrfs_dev_stat_inc_and_print(device,
+                                               BTRFS_DEV_STAT_CORRUPTION_ERRS);
+                       } else {
                                clean_io_failure(start, page);
+                       }
                }
 
                if (!uptodate && tree->ops && tree->ops->readpage_io_failed_hook) {