xen-netback: add control protocol implementation
My recent patch to include/xen/interface/io/netif.h defines a new shared
ring (in addition to the rx and tx rings) for passing control messages
from a VM frontend driver to a backend driver.
A previous patch added the necessary boilerplate for mapping the control
ring from the frontend, should it be created. This patch adds
implementations for each of the defined protocol messages.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index ff22b6d..1916ab3 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -89,6 +89,11 @@
*/
#define XEN_NETBACK_TX_COPY_LEN 128
+/* This is the maximum number of flows in the hash cache. */
+#define XENVIF_HASH_CACHE_SIZE_DEFAULT 64
+unsigned int xenvif_hash_cache_size = XENVIF_HASH_CACHE_SIZE_DEFAULT;
+module_param_named(hash_cache_size, xenvif_hash_cache_size, uint, 0644);
+MODULE_PARM_DESC(hash_cache_size, "Number of flows in the hash cache");
static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
u8 status);
@@ -2192,8 +2197,48 @@
static void process_ctrl_request(struct xenvif *vif,
const struct xen_netif_ctrl_request *req)
{
- make_ctrl_response(vif, req, XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED,
- 0);
+ u32 status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED;
+ u32 data = 0;
+
+ switch (req->type) {
+ case XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM:
+ status = xenvif_set_hash_alg(vif, req->data[0]);
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS:
+ status = xenvif_get_hash_flags(vif, &data);
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS:
+ status = xenvif_set_hash_flags(vif, req->data[0]);
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_SET_HASH_KEY:
+ status = xenvif_set_hash_key(vif, req->data[0],
+ req->data[1]);
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE:
+ status = XEN_NETIF_CTRL_STATUS_SUCCESS;
+ data = XEN_NETBK_MAX_HASH_MAPPING_SIZE;
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE:
+ status = xenvif_set_hash_mapping_size(vif,
+ req->data[0]);
+ break;
+
+ case XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING:
+ status = xenvif_set_hash_mapping(vif, req->data[0],
+ req->data[1],
+ req->data[2]);
+ break;
+
+ default:
+ break;
+ }
+
+ make_ctrl_response(vif, req, status, data);
push_ctrl_response(vif);
}
