Open object only if it's going to be read

Open()ing an object is necessarry only in two cases:
* Serving a GET request
* Recalculating etag when metadata is stale
  (can be triggered by any type of request)

This change ensures that for requests other than GET, a file is not
opened if the metadata is valid (size and etag accurate). Note that
if metadata is stale, the file is still opened and read to compute etag.
This patch does not change the behaviour of triggering metadata
validation and regeneration for non-GET requests.

Change-Id: Icefa4dec7d715ec9e6dd68ae7fe89a0d90fe71b3
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/13684
Reviewed-by: Thiago da Silva <thiago@redhat.com>
Tested-by: Thiago da Silva <thiago@redhat.com>

0 files changed, 0 insertions, 0 deletions