nfs41: get_clid_cred for EXCHANGE_ID

Unlike SETCLIENTID, EXCHANGE_ID requires a machine credential. Do not search
for credentials other than the machine credential.

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

3 files changed, 17 insertions, 0 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 1da3e354de22..61bc3a32e1e2 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -248,6 +248,7 @@ struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
 struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
 #if defined(CONFIG_NFS_V4_1)
 struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
+struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
 #endif /* CONFIG_NFS_V4_1 */
 
 extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b4e5442efa6c..64d611658d1f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4796,6 +4796,7 @@ struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
         .recover_open   = nfs4_open_reclaim,
         .recover_lock   = nfs4_lock_reclaim,
         .establish_clid = nfs4_proc_exchange_id,
+        .get_clid_cred  = nfs4_get_exchange_id_cred,
 };
 #endif /* CONFIG_NFS_V4_1 */
 
@@ -4815,6 +4816,7 @@ struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
         .recover_open   = nfs4_open_expired,
         .recover_lock   = nfs4_lock_expired,
         .establish_clid = nfs4_proc_exchange_id,
+        .get_clid_cred  = nfs4_get_exchange_id_cred,
 };
 #endif /* CONFIG_NFS_V4_1 */
 
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 90e56072844b..7dc971335ec2 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -114,6 +114,20 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp)
         return cred;
 }
 
+#if defined(CONFIG_NFS_V4_1)
+
+struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp)
+{
+        struct rpc_cred *cred;
+
+        spin_lock(&clp->cl_lock);
+        cred = nfs4_get_machine_cred_locked(clp);
+        spin_unlock(&clp->cl_lock);
+        return cred;
+}
+
+#endif /* CONFIG_NFS_V4_1 */
+
 struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
 {
         struct nfs4_state_owner *sp;