From: Andy Adamson <andros@xxxxxxxxxx>
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
---
include/linux/sunrpc/svc.h | 12 ++++++++++++
net/sunrpc/svc.c | 4 ++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 5a3085b..02329f4 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -281,6 +281,18 @@ struct svc_rqst {
};
/*
+ * Determine if a shared backchannel is in use
+ */
+static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
+{
+#ifdef CONFIG_NFS_V4_1
+ if (rqstp->rq_server->bc_xprt)
+ return 1;
+#endif /* CONFIG_NFS_V4_1 */
+ return 0;
+}
+
+/*
* Rigorous type checking on sockaddr type conversions
*/
static inline struct sockaddr_in *svc_addr_in(const struct svc_rqst *rqst)
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 538ca43..6dcf8c9 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
*/
--
1.6.6
--
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