NFSv4: Avoid referencing the cred unnecessarily during NFSv4 I/O

Avoid unnecessary references to the cred when we have already referenced
it through the open context or the open owner.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 692868d..a7fe64b 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2346,7 +2346,7 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
                .callback_ops = &nfs4_open_confirm_ops,
                .callback_data = data,
                .workqueue = nfsiod_workqueue,
-               .flags = RPC_TASK_ASYNC,
+               .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
        };
        int status;
 
@@ -2511,7 +2511,7 @@ static int nfs4_run_open_task(struct nfs4_opendata *data,
                .callback_ops = &nfs4_open_ops,
                .callback_data = data,
                .workqueue = nfsiod_workqueue,
-               .flags = RPC_TASK_ASYNC,
+               .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
        };
        int status;
 
@@ -3651,7 +3651,7 @@ int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
                .rpc_message = &msg,
                .callback_ops = &nfs4_close_ops,
                .workqueue = nfsiod_workqueue,
-               .flags = RPC_TASK_ASYNC,
+               .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
        };
        int status = -ENOMEM;
 
@@ -6350,7 +6350,7 @@ static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred,
                .rpc_client = server->client,
                .rpc_message = &msg,
                .callback_ops = &nfs4_delegreturn_ops,
-               .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
+               .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | RPC_TASK_TIMEOUT,
        };
        int status = 0;
 
@@ -6933,7 +6933,7 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
                .rpc_message = &msg,
                .callback_ops = &nfs4_lock_ops,
                .workqueue = nfsiod_workqueue,
-               .flags = RPC_TASK_ASYNC,
+               .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
        };
        int ret;