btrfs: Enhance error output for write time tree checker

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Unlike read time tree checker errors, write time error can't be
inspected by "btrfs inspect dump-tree", so we need extra information to
determine what's going wrong.

The patch will add the following output for write time tree checker
error:

- The content of the offending tree block
  To help determining if it's a false alert.

- Kernel WARN_ON() for debug build
  This is helpful for us to detect unexpected write time tree checker
  error, especially fstests could catch the dmesg.
  Since the WARN_ON() is only triggered for write time tree checker,
  test cases utilizing dm-error won't trigger this WARN_ON(), thus no
  extra noise.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2019-10-04 17:31:33 +08:00 • committed by David Sterba

parent 80d7fd1e09

commit c06631b0d8

1 changed files with 2 additions and 0 deletions

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fs/btrfs/disk-io.c

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