NFS construct consistent co_ownerid for v4.1

As stated in section 2.4 of RFC 5661, subsequent instances of the client need
to present the same co_ownerid. Concatinate the client's IP dot address,
host name, and the rpc_auth pseudoflavor to form the co_ownerid.

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

1 files changed, 10 insertions, 20 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9d992b0346e3..78936a8f40ab 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -50,6 +50,7 @@
 #include <linux/module.h>
 #include <linux/sunrpc/bc_xprt.h>
 #include <linux/xattr.h>
+#include <linux/utsname.h>
 
 #include "nfs4_fs.h"
 #include "delegation.h"
@@ -4572,27 +4573,16 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
         args.verifier = &verifier;
 
-        while (1) {
-                args.id_len = scnprintf(args.id, sizeof(args.id),
-                                        "%s/%s %u",
-                                        clp->cl_ipaddr,
-                                        rpc_peeraddr2str(clp->cl_rpcclient,
-                                                         RPC_DISPLAY_ADDR),
-                                        clp->cl_id_uniquifier);
-
-                status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
-
-                if (status != -NFS4ERR_CLID_INUSE)
-                        break;
-
-                if (signalled())
-                        break;
-
-                if (++clp->cl_id_uniquifier == 0)
-                        break;
-        }
+        args.id_len = scnprintf(args.id, sizeof(args.id),
+                                "%s/%s.%s/%u",
+                                clp->cl_ipaddr,
+                                init_utsname()->nodename,
+                                init_utsname()->domainname,
+                                clp->cl_rpcclient->cl_auth->au_flavor);
 
-        status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
+        status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
+        if (!status)
+                status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
         dprintk("<-- %s status= %d\n", __func__, status);
         return status;
 }