tree 9905d556655ff0f036936ea51f9aa214bd2cbce8
parent f3f266ab1bfe4770375d24fa8e72a03278e9450a
author Josef Bacik <josef@redhat.com> 1332813456 -0400
committer Chris Mason <chris.mason@oracle.com> 1332813456 -0400

Btrfs: deal with read errors on extent buffers differently

Since we need to read and write extent buffers in their entirety we can't use
the normal bio_readpage_error stuff since it only works on a per page basis.  So
instead make it so that if we see an io error in endio we just mark the eb as
having an IO error and then in btree_read_extent_buffer_pages we will manually
try other mirrors and then overwrite the bad mirror if we find a good copy.
This works with larger than page size blocks.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>