NFSv4.1: nfs4_proc_bind_conn_to_session must iterate over all connections
Use the new helper to ensure that nfs4_proc_bind_conn_to_session() is called
for all connections.
However ensure that we only set the backchannel flag for the connection
pointed to by rpc_clnt->cl_xprt.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4bfc33a..36471e0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6783,12 +6783,16 @@
}
/*
- * nfs4_proc_bind_conn_to_session()
+ * nfs4_proc_bind_one_conn_to_session()
*
* The 4.1 client currently uses the same TCP connection for the
* fore and backchannel.
*/
-int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
+static
+int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
+ struct rpc_xprt *xprt,
+ struct nfs_client *clp,
+ struct rpc_cred *cred)
{
int status;
struct nfs41_bind_conn_to_session_args args = {
@@ -6803,6 +6807,13 @@
.rpc_resp = &res,
.rpc_cred = cred,
};
+ struct rpc_task_setup task_setup_data = {
+ .rpc_client = clnt,
+ .rpc_xprt = xprt,
+ .rpc_message = &msg,
+ .flags = RPC_TASK_TIMEOUT,
+ };
+ struct rpc_task *task;
dprintk("--> %s\n", __func__);
@@ -6810,7 +6821,16 @@
if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
args.dir = NFS4_CDFC4_FORE;
- status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
+ /* Do not set the backchannel flag unless this is clnt->cl_xprt */
+ if (xprt != rcu_access_pointer(clnt->cl_xprt))
+ args.dir = NFS4_CDFC4_FORE;
+
+ task = rpc_run_task(&task_setup_data);
+ if (!IS_ERR(task)) {
+ status = task->tk_status;
+ rpc_put_task(task);
+ } else
+ status = PTR_ERR(task);
trace_nfs4_bind_conn_to_session(clp, status);
if (status == 0) {
if (memcmp(res.sessionid.data,
@@ -6837,6 +6857,31 @@
return status;
}
+struct rpc_bind_conn_calldata {
+ struct nfs_client *clp;
+ struct rpc_cred *cred;
+};
+
+static int
+nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
+ struct rpc_xprt *xprt,
+ void *calldata)
+{
+ struct rpc_bind_conn_calldata *p = calldata;
+
+ return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
+}
+
+int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
+{
+ struct rpc_bind_conn_calldata data = {
+ .clp = clp,
+ .cred = cred,
+ };
+ return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
+ nfs4_proc_bind_conn_to_session_callback, &data);
+}
+
/*
* Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
* and operations we'd like to see to enable certain features in the allow map