rpc/server: add anonuid and anongid options for root-squash

Introduce new options to modify the behaviour of server.root-squash.
With server.anonuid and server.anongid the uid/gid can be specified and
the root user (uid=0 and gid=0) will be mapped to the given uid/gid
instead of nfsnobody (uid=65534 and gid=65534).

Many thanks to Vikhyat Umrao for writing the majority of the test-case!

Change-Id: I6379a3d2ef52b9b9707f2f6f0529657580c8d779
BUG: 1043886
CC: Vikhyat Umrao <vumrao@redhat.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/6546
Reviewed-by: Santosh Pradhan <spradhan@redhat.com>
Reviewed-by: Vikhyat Umrao <vumrao@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/rpc/rpc-lib/src/rpcsvc-auth.c b/rpc/rpc-lib/src/rpcsvc-auth.c
index 4cb86a75839..0ede19f741b 100644
--- a/rpc/rpc-lib/src/rpcsvc-auth.c
+++ b/rpc/rpc-lib/src/rpcsvc-auth.c
@@ -230,6 +230,8 @@ int
 rpcsvc_set_root_squash (rpcsvc_t *svc, dict_t *options)
 {
         int  ret = -1;
+        uid_t anonuid = -1;
+        gid_t anongid = -1;
 
         GF_ASSERT (svc);
         GF_ASSERT (options);
@@ -240,8 +242,21 @@ rpcsvc_set_root_squash (rpcsvc_t *svc, dict_t *options)
         else
                 svc->root_squash = _gf_false;
 
+        ret = dict_get_uint32 (options, "anonuid", &anonuid);
+        if (!ret)
+                svc->anonuid = anonuid;
+        else
+                svc->anonuid = RPC_NOBODY_UID;
+
+        ret = dict_get_uint32 (options, "anongid", &anongid);
+        if (!ret)
+                svc->anongid = anongid;
+        else
+                svc->anongid = RPC_NOBODY_GID;
+
         if (svc->root_squash)
-                gf_log (GF_RPCSVC, GF_LOG_DEBUG, "root squashing enabled ");
+                gf_log (GF_RPCSVC, GF_LOG_DEBUG, "root squashing enabled "
+                        "(uid=%d, gid=%d)", svc->anonuid, svc->anongid);
 
         return 0;
 }