Btrfs: add device counters for detected IO and checksum errors

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

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0f788c0590633135285da20fe93da8110377bf65..46d474e74aa40e1489329a80ad9a1ae035402f3b 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2557,18 +2557,19 @@ recovery_tree_root:
 
 static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
 {
-       char b[BDEVNAME_SIZE];
-
        if (uptodate) {
                set_buffer_uptodate(bh);
        } else {
+               struct btrfs_device *device = (struct btrfs_device *)
+                       bh->b_private;
+
                printk_ratelimited(KERN_WARNING "lost page write due to "
-                                       "I/O error on %s\n",
-                                      bdevname(bh->b_bdev, b));
+                                  "I/O error on %s\n", device->name);
                /* note, we dont' set_buffer_write_io_error because we have
                 * our own ways of dealing with the IO errors
                 */
                clear_buffer_uptodate(bh);
+               btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS);
        }
        unlock_buffer(bh);
        put_bh(bh);
@@ -2683,6 +2684,7 @@ static int write_dev_supers(struct btrfs_device *device,
                        set_buffer_uptodate(bh);
                        lock_buffer(bh);
                        bh->b_end_io = btrfs_end_buffer_write_sync;
+                       bh->b_private = device;
                }
 
                /*
@@ -2741,6 +2743,9 @@ static int write_dev_flush(struct btrfs_device *device, int wait)
                }
                if (!bio_flagged(bio, BIO_UPTODATE)) {
                        ret = -EIO;
+                       if (!bio_flagged(bio, BIO_EOPNOTSUPP))
+                               btrfs_dev_stat_inc_and_print(device,
+                                       BTRFS_DEV_STAT_FLUSH_ERRS);
                }
 
                /* drop the reference from the wait == 0 run */