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authorBrenden Blanco <bblanco@plumgrid.com>2016-07-19 12:16:48 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-19 21:46:31 -0700
commita7862b45849fe2f8610a2bec89235580f55d337f (patch)
tree622f97fb21ba33f2e7a43e213d766f61874ace57 /net
parent6a773a15a1e8874e5eccd2f29190c31085912c95 (diff)
net: add ndo to setup/query xdp prog in adapter rx
Add one new netdev op for drivers implementing the BPF_PROG_TYPE_XDP filter. The single op is used for both setup/query of the xdp program, modelled after ndo_setup_tc. Signed-off-by: Brenden Blanco <bblanco@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 7894e406c806..2a9c39f8824e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -94,6 +94,7 @@
#include <linux/ethtool.h>
#include <linux/notifier.h>
#include <linux/skbuff.h>
+#include <linux/bpf.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/busy_poll.h>
@@ -6615,6 +6616,38 @@ int dev_change_proto_down(struct net_device *dev, bool proto_down)
EXPORT_SYMBOL(dev_change_proto_down);
/**
+ * dev_change_xdp_fd - set or clear a bpf program for a device rx path
+ * @dev: device
+ * @fd: new program fd or negative value to clear
+ *
+ * Set or clear a bpf program for a device
+ */
+int dev_change_xdp_fd(struct net_device *dev, int fd)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ struct bpf_prog *prog = NULL;
+ struct netdev_xdp xdp = {};
+ int err;
+
+ if (!ops->ndo_xdp)
+ return -EOPNOTSUPP;
+ if (fd >= 0) {
+ prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_XDP);
+ if (IS_ERR(prog))
+ return PTR_ERR(prog);
+ }
+
+ xdp.command = XDP_SETUP_PROG;
+ xdp.prog = prog;
+ err = ops->ndo_xdp(dev, &xdp);
+ if (err < 0 && prog)
+ bpf_prog_put(prog);
+
+ return err;
+}
+EXPORT_SYMBOL(dev_change_xdp_fd);
+
+/**
* dev_new_index - allocate an ifindex
* @net: the applicable net namespace
*