nfs41: establish sessions-based clientid

nfsv4.1 clientid is established via EXCHANGE_ID rather than
SETCLIENTID{,_CONFIRM}

This is implemented using a new establish_clid method in
nfs4_state_recovery_ops.

nfs41: establish clientid via exchange id only if cred != NULL

>From 2.6.26 reclaimer() uses machine cred for setting up the client id
therefore it is never expected to be NULL.

Signed-off-by: Rahul Iyer <iyer@netapp.com>
[removed dprintk]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: lease renewal]
[revamped patch for new nfs4_state_manager design]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index da940abcfaa5..e17bd4412174 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -60,7 +60,7 @@ const nfs4_stateid zero_stateid;
 
 static LIST_HEAD(nfs4_clientid_list);
 
-static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
+int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
 {
         unsigned short port;
         int status;
@@ -1098,11 +1098,13 @@ out:
 static int nfs4_reclaim_lease(struct nfs_client *clp)
 {
         struct rpc_cred *cred;
+        struct nfs4_state_recovery_ops *ops =
+                nfs4_reboot_recovery_ops[clp->cl_minorversion];
         int status = -ENOENT;
 
         cred = nfs4_get_setclientid_cred(clp);
         if (cred != NULL) {
-                status = nfs4_init_client(clp, cred);
+                status = ops->establish_clid(clp, cred);
                 put_rpccred(cred);
                 /* Handle case where the user hasn't set up machine creds */
                 if (status == -EACCES && cred == clp->cl_machine_cred) {
@@ -1208,7 +1210,8 @@ static void nfs4_state_manager(struct nfs_client *clp)
                 }
                 /* First recover reboot state... */
                 if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
-                        status = nfs4_do_reclaim(clp, &nfs4_reboot_recovery_ops);
+                        status = nfs4_do_reclaim(clp,
+                                nfs4_reboot_recovery_ops[clp->cl_minorversion]);
                         if (status == -NFS4ERR_STALE_CLIENTID)
                                 continue;
                         if (test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
@@ -1219,7 +1222,8 @@ static void nfs4_state_manager(struct nfs_client *clp)
 
                 /* Now recover expired state... */
                 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
-                        status = nfs4_do_reclaim(clp, &nfs4_nograce_recovery_ops);
+                        status = nfs4_do_reclaim(clp,
+                                nfs4_nograce_recovery_ops[clp->cl_minorversion]);
                         if (status < 0) {
                                 set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
                                 if (status == -NFS4ERR_STALE_CLIENTID)