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-rw-r--r--include/linux/sunrpc/bc_xprt.h15
-rw-r--r--net/sunrpc/svc.c4
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/sunrpc/bc_xprt.h b/include/linux/sunrpc/bc_xprt.h
index 6508f0dc0ef..d7152b451e2 100644
--- a/include/linux/sunrpc/bc_xprt.h
+++ b/include/linux/sunrpc/bc_xprt.h
@@ -38,12 +38,27 @@ int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
void xprt_destroy_backchannel(struct rpc_xprt *, int max_reqs);
void bc_release_request(struct rpc_task *);
int bc_send(struct rpc_rqst *req);
+
+/*
+ * Determine if a shared backchannel is in use
+ */
+static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
+{
+ if (rqstp->rq_server->bc_xprt)
+ return 1;
+ return 0;
+}
#else /* CONFIG_NFS_V4_1 */
static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
unsigned int min_reqs)
{
return 0;
}
+
+static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
+{
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
#endif /* _LINUX_SUNRPC_BC_XPRT_H */
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 538ca433a56..6dcf8c9c784 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -506,6 +506,10 @@ svc_init_buffer(struct svc_rqst *rqstp, unsigned int size)
{
unsigned int pages, arghi;
+ /* bc_xprt uses fore channel allocated buffers */
+ if (svc_is_backchannel(rqstp))
+ return 1;
+
pages = size / PAGE_SIZE + 1; /* extra page as we hold both request and reply.
* We assume one is at most one page
*/