Add server-side aux-GID resolution.

Change-Id: I09bcbfa41c7c31894ae35f24086bef2d90035ccc
BUG: 827457
Signed-off-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-on: http://review.gluster.com/3241
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/nfs.h b/xlators/nfs/server/src/nfs.h
index 4c6d039f8d2..d2a0c134318 100644
--- a/xlators/nfs/server/src/nfs.h
+++ b/xlators/nfs/server/src/nfs.h
@@ -65,6 +65,27 @@ struct nfs_initer_list {
         rpcsvc_program_t        *program;
 };
 
+/*
+ * TBD: make the cache size tunable
+ *
+ * The current size represents a pretty trivial amount of memory, and should
+ * provide good hit rates even for quite busy systems.  If we ever want to
+ * support really large cache sizes, we'll need to do dynamic allocation
+ * instead of just defining an array within nfs_state.  It doesn't make a
+ * whole lot of sense to change the associativity, because it won't improve
+ * hit rates all that much and will increase the maintenance cost as we have
+ * to scan more entries with every lookup/update.
+ */
+#define AUX_GID_CACHE_ASSOC     4
+#define AUX_GID_CACHE_BUCKETS   256
+#define AUX_GID_CACHE_SIZE      (AUX_GID_CACHE_ASSOC * AUX_GID_CACHE_BUCKETS)
+
+typedef struct {
+        uid_t                   uid;
+        int                     gid_count;
+        gid_t                   *gid_list;
+        time_t                  deadline;
+} aux_gid_list_t;
 
 struct nfs_state {
         rpcsvc_t                *rpcsvc;
@@ -88,6 +109,11 @@ struct nfs_state {
         int                     enable_nlm;
         int                     mount_udp;
         struct rpc_clnt         *rpc_clnt;
+        gf_boolean_t            server_aux_gids;
+        gf_lock_t               aux_gid_lock;
+        uint32_t                aux_gid_max_age;
+        unsigned int            aux_gid_nbuckets;
+        aux_gid_list_t          aux_gid_cache[AUX_GID_CACHE_SIZE];
 };
 
 #define gf_nfs_dvm_on(nfsstt)   (((struct nfs_state *)nfsstt)->dynamicvolumes == GF_NFS_DVM_ON)
@@ -126,4 +152,7 @@ nfs_request_primary_user_init (nfs_user_t *nfu, rpcsvc_request_t *req,
                                uid_t uid, gid_t gid);
 extern int
 nfs_subvolume_started (struct nfs_state *nfs, xlator_t *xl);
+
+extern void
+nfs_fix_groups (xlator_t *this, call_stack_t *root);
 #endif