diff options
| author | Brenden Blanco <bblanco@plumgrid.com> | 2016-07-19 12:16:48 -0700 |
|---|---|---|
| committer | Georg Veichtlbauer <georg@vware.at> | 2023-11-02 10:58:58 +0100 |
| commit | 420c7da5ec99f942f2f7b77fdbd9059044f626e4 (patch) | |
| tree | 8fc9d8e748ea086c843f97b89b1c9cbe45620713 /net/core/dev.c | |
| parent | f55efe5b761076743338418a1f888cb4ef2ff137 (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.
Change-Id: Ie46dec0b47e417e97d5fed19d7f2b143eab4ea73
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 352581dd5922..79f7b6fe9ce1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -95,6 +95,7 @@ #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 <linux/rtnetlink.h> @@ -6327,6 +6328,38 @@ 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 * |