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| author | John Fastabend <john.fastabend@gmail.com> | 2017-07-17 09:27:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-17 09:48:05 -0700 |
| commit | 814abfabef3ceed390c10d06a0cc69a86454b6cf (patch) | |
| tree | fe6ae9f9007124e1ddd76efd152f5d60db0a5bd9 /include/linux/filter.h | |
| parent | d445516966dcb2924741b13b27738b54df2af01a (diff) | |
| download | lwn-814abfabef3ceed390c10d06a0cc69a86454b6cf.tar.gz lwn-814abfabef3ceed390c10d06a0cc69a86454b6cf.zip | |
xdp: add bpf_redirect helper function
This adds support for a bpf_redirect helper function to the XDP
infrastructure. For now this only supports redirecting to the egress
path of a port.
In order to support drivers handling a xdp_buff natively this patches
uses a new ndo operation ndo_xdp_xmit() that takes pushes a xdp_buff
to the specified device.
If the program specifies either (a) an unknown device or (b) a device
that does not support the operation a BPF warning is thrown and the
XDP_ABORTED error code is returned.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/filter.h')
| -rw-r--r-- | include/linux/filter.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index bfef1e5734f8..64cae7a08148 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -711,7 +711,11 @@ bool bpf_helper_changes_pkt_data(void *func); struct bpf_prog *bpf_patch_insn_single(struct bpf_prog *prog, u32 off, const struct bpf_insn *patch, u32 len); + +int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp); + void bpf_warn_invalid_xdp_action(u32 act); +void bpf_warn_invalid_xdp_redirect(u32 ifindex); #ifdef CONFIG_BPF_JIT extern int bpf_jit_enable; |