[PATCH] Ceph RADOS cluster mutex helper for Samba CTDB

[David Disseldorp]

Hi,

The attached patch-set implements a cluster mutex helper for Samba CTDB
using Ceph librados.

ctdb_mutex_ceph_rados_helper_lock can be used as a recovery lock provider
for CTDB.  When configured, split brain avoidance during CTDB recovery
will be handled using locks against an object located in a Ceph RADOS
pool.

I've also attached a standalone test script - @Martin: does this belong
in the ctdb test suite, or can I just commit it as a standalone test?
It has a few non-standard dependencies: a running Ceph cluster, the
rados and jq binaries.

Feedback appreciated.

Cheers, David

--

 ctdb/doc/Makefile                           |   3 +-
 ctdb/doc/ctdb_mutex_ceph_rados_helper.7.xml |  90 ++++++
 ctdb/tools/ctdb_mutex_ceph_rados_helper.c   | 334 ++++++++++++++++++++
 ctdb/wscript                                |  19 ++
 4 files changed, 445 insertions(+), 1 deletion(-)

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