NFS do not find client in NFSv4 pg_authenticate

The information required to find the nfs_client cooresponding to the incoming
back channel request is contained in the NFS layer. Perform minimal checking
in the RPC layer pg_authenticate method, and push more detailed checking into
the NFS layer where the nfs_client can be found.

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

1 files changed, 2 insertions, 8 deletions

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 4bb91cb2620..829f406e91d 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -373,17 +373,11 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
 {
         struct nfs_client *clp;
         int i;
-        __be32 status;
+        __be32 status = htonl(NFS4ERR_BADSESSION);
 
         cps->clp = NULL;
 
-        status = htonl(NFS4ERR_BADSESSION);
-        /* Incoming session must match the callback session */
-        if (memcmp(&args->csa_sessionid, cps->svc_sid, NFS4_MAX_SESSIONID_LEN))
-                goto out;
-
-        clp = nfs4_find_client_sessionid(args->csa_addr,
-                                         &args->csa_sessionid, 1);
+        clp = nfs4_find_client_sessionid(args->csa_addr, &args->csa_sessionid);
         if (clp == NULL)
                 goto out;