A CREATE_SESSION operation with SESSION4_BACK_CHAN cleared is sent
to force the server to report SEQ4_STATUS_CB_PATH_DOWN. The client
recovers by setting up a sidecar backchannel connection.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 2eaf7ec..e0bcc30 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7187,6 +7187,7 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
struct nfs41_create_session_args args = {
.client = clp,
.cb_program = NFS4_CALLBACK,
+ .flags = SESSION4_PERSIST,
};
struct nfs41_create_session_res res = {
.client = clp,
@@ -7200,7 +7201,8 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
int status;
nfs4_init_channel_attrs(&args);
- args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
+ if (!clp->cl_bc_rpcclient)
+ args.flags |= SESSION4_BACK_CHAN;
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
trace_nfs4_create_session(clp, status);
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
