nfs: add auth-cache for the MOUNT protocol

Authentication cache for the new fine grained contol for the MOUNT
protocol. The extended authentication (see Change-Id Ic060aac) benefits
from caching the access/permission checks that are done when an
NFS-client mounts an export.

This auth-cache will be used by Change-Id I181e8c1.

BUG: 1143880
Change-Id: I1379116572c8a4d1bf0c7ca4f826e51a79d91444
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/9363
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/auth-cache.h b/xlators/nfs/server/src/auth-cache.h
new file mode 100644
index 00000000000..5f2f03c1cb8
--- /dev/null
+++ b/xlators/nfs/server/src/auth-cache.h
@@ -0,0 +1,53 @@
+/*
+  Copyright 2014-present Facebook. All Rights Reserved
+
+  This file is part of GlusterFS.
+
+   Author :
+   Shreyas Siravara <shreyas.siravara@gmail.com>
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef _AUTH_CACHE_H_
+#define _AUTH_CACHE_H_
+
+#include "nfs-mem-types.h"
+#include "mount3.h"
+#include "exports.h"
+#include "dict.h"
+#include "nfs3.h"
+
+struct auth_cache {
+        dict_t *cache_dict;      /* Dict holding fh -> authcache_entry */
+        time_t ttl_sec;          /* TTL of the auth cache in seconds */
+};
+
+
+/* Initializes the cache */
+struct auth_cache *
+auth_cache_init (time_t ttl_sec);
+
+/* Inserts FH into cache */
+int
+cache_nfs_fh (struct auth_cache *cache, struct nfs3_fh *fh,
+              const char *host_addr, struct export_item *export_item);
+
+/* Checks if the filehandle cached & writable */
+gf_boolean_t
+is_nfs_fh_cached_and_writeable (struct auth_cache *cache, struct nfs3_fh *fh,
+                                const char *host_addr);
+
+/* Checks if the filehandle is cached */
+gf_boolean_t
+is_nfs_fh_cached (struct auth_cache *cache, struct nfs3_fh *fh,
+                  const char *host_addr);
+
+/* Purge the cache */
+void
+auth_cache_purge (struct auth_cache *cache);
+
+#endif /* _AUTH_CACHE_H_ */