diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2017-04-27 18:11:13 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-27 18:49:26 +0200 |
| commit | 3993f2cb983b2100409851f7b2abb21d685ea19c (patch) | |
| tree | 8830b0c2f03b2ec010a4746392ad345516982763 /samples/bpf/bpf_load.c | |
| parent | rhashtable: Cap total number of entries to 2^31 (diff) | |
| download | linux-3993f2cb983b2100409851f7b2abb21d685ea19c.tar.xz linux-3993f2cb983b2100409851f7b2abb21d685ea19c.zip | |
samples/bpf: Add support for SKB_MODE to xdp1 and xdp_tx_iptunnel
Add option to xdp1 and xdp_tx_iptunnel to insert xdp program in
SKB_MODE:
- update set_link_xdp_fd to take a flags argument that is added to the
RTM_SETLINK message
- Add -S option to xdp1 and xdp_tx_iptunnel user code. When passed in
XDP_FLAGS_SKB_MODE is set in the flags arg passed to set_link_xdp_fd
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/bpf_load.c')
| -rw-r--r-- | samples/bpf/bpf_load.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c index 0d449d8032d1..d4433a47e6c3 100644 --- a/samples/bpf/bpf_load.c +++ b/samples/bpf/bpf_load.c @@ -563,7 +563,7 @@ struct ksym *ksym_search(long key) return &syms[0]; } -int set_link_xdp_fd(int ifindex, int fd) +int set_link_xdp_fd(int ifindex, int fd, int flags) { struct sockaddr_nl sa; int sock, seq = 0, len, ret = -1; @@ -599,15 +599,28 @@ int set_link_xdp_fd(int ifindex, int fd) req.nh.nlmsg_seq = ++seq; req.ifinfo.ifi_family = AF_UNSPEC; req.ifinfo.ifi_index = ifindex; + + /* started nested attribute for XDP */ nla = (struct nlattr *)(((char *)&req) + NLMSG_ALIGN(req.nh.nlmsg_len)); nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/; + nla->nla_len = NLA_HDRLEN; - nla_xdp = (struct nlattr *)((char *)nla + NLA_HDRLEN); + /* add XDP fd */ + nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len); nla_xdp->nla_type = 1/*IFLA_XDP_FD*/; nla_xdp->nla_len = NLA_HDRLEN + sizeof(int); memcpy((char *)nla_xdp + NLA_HDRLEN, &fd, sizeof(fd)); - nla->nla_len = NLA_HDRLEN + nla_xdp->nla_len; + nla->nla_len += nla_xdp->nla_len; + + /* if user passed in any flags, add those too */ + if (flags) { + nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len); + nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/; + nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags); + memcpy((char *)nla_xdp + NLA_HDRLEN, &flags, sizeof(flags)); + nla->nla_len += nla_xdp->nla_len; + } req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len); |