gNFS: Export / Netgroup authentication on Gluster NFS mount

* Parses linux style export file/netgroups file into a structure that
  can be lookedup.

* This parser turns each line into a structure called an "export
  directory". Each of these has a dictionary of hosts and netgroups
  which can be looked up during the mount authentication process.
  (See Change-Id Ic060aac and I7e6aa6bc)

* A string beginning withan '@' is treated as a netgroup and a string
  beginning without an @ is a host.
  (See Change-Id Ie04800d)

* This parser does not currently support all the options in the man page
  ('man exports'), but we can easily add them.

BUG: 1143880
URL: http://www.gluster.org/community/documentation/index.php/Features/Exports_Netgroups_Authentication
Change-Id: I181e8c1814d6ef3cae5b4d88353622734f0c0f0b
Original-author: Shreyas Siravara <shreyas.siravara@gmail.com>
CC: Richard Wareing <rwareing@fb.com>
CC: Jiffin Tony Thottan <jthottan@redhat.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/8758
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/nfs.h b/xlators/nfs/server/src/nfs.h
index 7d5dfa63acb..e2e5613d501 100644
--- a/xlators/nfs/server/src/nfs.h
+++ b/xlators/nfs/server/src/nfs.h
@@ -85,6 +85,15 @@ struct nfs_state {
         int                     enable_nlm;
         int                     enable_acl;
         int                     mount_udp;
+
+        /* Enable exports auth model */
+        int                     exports_auth;
+        /* Refresh auth params from disk periodically */
+        int                     refresh_auth;
+
+        unsigned int            auth_refresh_time_secs;
+        unsigned int            auth_cache_ttl_sec;
+
         char                    *rmtab;
         struct rpc_clnt         *rpc_clnt;
         gf_boolean_t            server_aux_gids;