summaryrefslogtreecommitdiff
path: root/net/sunrpc/xprtsock.c
diff options
context:
space:
mode:
authorChuck Lever <chuck.lever@oracle.com>2016-05-02 21:40:40 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-05-17 22:47:57 +0300
commit6b26cc8c8ead3636a18bfd9489984983f4ddd6f4 (patch)
treea568d97b3fea0065f56122b1652ecc7748fa1da5 /net/sunrpc/xprtsock.c
parent4b9c7f9db9a003f5c342184dc4401c1b7f2efb39 (diff)
downloadlinux-6b26cc8c8ead3636a18bfd9489984983f4ddd6f4.tar.xz
sunrpc: Advertise maximum backchannel payload size
RPC-over-RDMA transports have a limit on how large a backward direction (backchannel) RPC message can be. Ensure that the NFSv4.x CREATE_SESSION operation advertises this limit to servers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
-rw-r--r--net/sunrpc/xprtsock.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 65e759569e48..f1faf6b9aaff 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1365,6 +1365,11 @@ static int xs_tcp_bc_up(struct svc_serv *serv, struct net *net)
return ret;
return 0;
}
+
+static size_t xs_tcp_bc_maxpayload(struct rpc_xprt *xprt)
+{
+ return PAGE_SIZE;
+}
#else
static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
struct xdr_skb_reader *desc)
@@ -2660,6 +2665,7 @@ static struct rpc_xprt_ops xs_tcp_ops = {
#ifdef CONFIG_SUNRPC_BACKCHANNEL
.bc_setup = xprt_setup_bc,
.bc_up = xs_tcp_bc_up,
+ .bc_maxpayload = xs_tcp_bc_maxpayload,
.bc_free_rqst = xprt_free_bc_rqst,
.bc_destroy = xprt_destroy_bc,
#endif