SUNRPC: Don't spam gssd with upcall requests when the kerberos key expired

Now that the rpc.gssd daemon can explicitly tell us that the key expired,
we should cache that information to avoid spamming gssd.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index 996df4dac7d4..87d7ec0bf779 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -54,6 +54,7 @@ struct rpc_cred {
 #define RPCAUTH_CRED_NEW        0
 #define RPCAUTH_CRED_UPTODATE   1
 #define RPCAUTH_CRED_HASHED     2
+#define RPCAUTH_CRED_NEGATIVE   3
 
 #define RPCAUTH_CRED_MAGIC      0x0f4aa4f0
 
diff --git a/include/linux/sunrpc/auth_gss.h b/include/linux/sunrpc/auth_gss.h
index d48d4e605f74..671538d25bc1 100644
--- a/include/linux/sunrpc/auth_gss.h
+++ b/include/linux/sunrpc/auth_gss.h
@@ -82,6 +82,7 @@ struct gss_cred {
         enum rpc_gss_svc        gc_service;
         struct gss_cl_ctx       *gc_ctx;
         struct gss_upcall_msg   *gc_upcall;
+        unsigned long           gc_upcall_timestamp;
         unsigned char           gc_machine_cred : 1;
 };