tier/ctr: Providing option to record or ignore metadata heat

Currently we heat up a file for both data and metadata write.
Here we provide a ctr xlator option called "ctr-record-metadata-heat"
were the admin can decide on recording metadata heat i.e heatup a
file on metadata writes or not.
Metadata data operation are
a. setattr: explicit changing of atime/mtime using utimes,
            changing of posix permissions of the file
b. rename: Renaming a file,
c. unlink, link: adding or deleting hardlinks
d. xattrs: setting or removal of xattrs.

NOTE: atime, mtime and ctime change through writev, readv, truncate, mknod
and create will not be considered here as these fops are data and primary
metadata fops.

Defaultly "ctr-record-metadata-heat" is off. Admin can
switch it on using gluster volume set command.

Backport of http://review.gluster.org/12540

> Change-Id: I91157509255dd5cb429cda2b6d4f64582e155e7b
> BUG: 1279166
> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
> Reviewed-on: http://review.gluster.org/12540
> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
> Tested-by: Gluster Build System <jenkins@build.gluster.com>
> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
> Tested-by: Dan Lambright <dlambrig@redhat.com>
Signed-off-by: Joseph Fernandes <josferna@redhat.com>

Change-Id: I986c319f0cc337b0692a1dd02f71254e786afac4
BUG: 1282315
Reviewed-on: http://review.gluster.org/12582
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>

0 files changed, 0 insertions, 0 deletions