#define KBUILD_MODNAME "foo"
#include <uapi/linux/bpf.h>
#include <uapi/linux/if_ether.h>
#include <uapi/linux/if_packet.h>
#include <uapi/linux/ip.h>
#include <uapi/linux/in.h>
#include <uapi/linux/tcp.h>
#include <uapi/linux/filter.h>
#include <uapi/linux/pkt_cls.h>
#include "bpf_helpers.h"

/* compiler workaround */
#define _htonl __builtin_bswap32

static inline void set_dst_mac(struct __sk_buff *skb, char *mac)
{
	bpf_skb_store_bytes(skb, 0, mac, ETH_ALEN, 1);
}

#define IP_CSUM_OFF (ETH_HLEN + offsetof(struct iphdr, check))
#define TOS_OFF (ETH_HLEN + offsetof(struct iphdr, tos))

static inline void set_ip_tos(struct __sk_buff *skb, __u8 new_tos)
{
	__u8 old_tos = load_byte(skb, TOS_OFF);

	bpf_l3_csum_replace(skb, IP_CSUM_OFF, htons(old_tos), htons(new_tos), 2);
	bpf_skb_store_bytes(skb, TOS_OFF, &new_tos, sizeof(new_tos), 0);
}

#define TCP_CSUM_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct tcphdr, check))
#define IP_SRC_OFF (ETH_HLEN + offsetof(struct iphdr, saddr))

#define IS_PSEUDO 0x10

static inline void set_tcp_ip_src(struct __sk_buff *skb, __u32 new_ip)
{
	__u32 old_ip = _htonl(load_word(skb, IP_SRC_OFF));

	bpf_l4_csum_replace(skb, TCP_CSUM_OFF, old_ip, new_ip, IS_PSEUDO | sizeof(new_ip));
	bpf_l3_csum_replace(skb, IP_CSUM_OFF, old_ip, new_ip, sizeof(new_ip));
	bpf_skb_store_bytes(skb, IP_SRC_OFF, &new_ip, sizeof(new_ip), 0);
}

#define TCP_DPORT_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct tcphdr, dest))
static inline void set_tcp_dest_port(struct __sk_buff *skb, __u16 new_port)
{
	__u16 old_port = htons(load_half(skb, TCP_DPORT_OFF));

	bpf_l4_csum_replace(skb, TCP_CSUM_OFF, old_port, new_port, sizeof(new_port));
	bpf_skb_store_bytes(skb, TCP_DPORT_OFF, &new_port, sizeof(new_port), 0);
}

SEC("classifier")
int bpf_prog1(struct __sk_buff *skb)
{
	__u8 proto = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol));
	long *value;

	if (proto == IPPROTO_TCP) {
		set_ip_tos(skb, 8);
		set_tcp_ip_src(skb, 0xA010101);
		set_tcp_dest_port(skb, 5001);
	}

	return 0;
}
SEC("redirect_xmit")
int _redirect_xmit(struct __sk_buff *skb)
{
	return bpf_redirect(skb->ifindex + 1, 0);
}
SEC("redirect_recv")
int _redirect_recv(struct __sk_buff *skb)
{
	return bpf_redirect(skb->ifindex + 1, 1);
}
SEC("clone_redirect_xmit")
int _clone_redirect_xmit(struct __sk_buff *skb)
{
	bpf_clone_redirect(skb, skb->ifindex + 1, 0);
	return TC_ACT_SHOT;
}
SEC("clone_redirect_recv")
int _clone_redirect_recv(struct __sk_buff *skb)
{
	bpf_clone_redirect(skb, skb->ifindex + 1, 1);
	return TC_ACT_SHOT;
}
char _license[] SEC("license") = "GPL";
elect name='qt'>
<option value='grep'>log msg</option>
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<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>sunrpc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/xprtrdma?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>xprtrdma</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>verbs.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='1930b60352e7e195f55b27cde15d2a8f43342a8b'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 15:55:48 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 15:56:40 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>1930b60352e7e195f55b27cde15d2a8f43342a8b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sunrpc/xprtrdma/verbs.c?id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>ec3f66cd8d8110bf7b4f61e0446bdea505915db9</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>net/sunrpc/xprtrdma/verbs.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=4be9993493bc7ee3fdf950a83bc050a3e6cf2a45'>4be9993493bc7ee3fdf950a83bc050a3e6cf2a45</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b&amp;id2=4be9993493bc7ee3fdf950a83bc050a3e6cf2a45'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=ec960de61503ef349588dccfa3ae02efabcc2762'>ec960de61503ef349588dccfa3ae02efabcc2762</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sunrpc/xprtrdma/verbs.c?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b&amp;id2=ec960de61503ef349588dccfa3ae02efabcc2762'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'dsa-port-mirroring'</div><div class='commit-msg'>Florian Fainelli says:

====================
net: dsa: Port mirroring support

This patch series adds support for port mirroring in the two
Broadcom switch drivers. The major part of the functional are actually with
the plumbing between tc and the drivers.

Changes in v5:

- Added Jiri's Reviewed-by tag to first patch
- rebase against latest net-next/master after bcm_sf2 CFP series

Changes in v4:

- rebased against latest net-next/master after Vivien's changes

Changes in v3:

- removed multiline comments from added structures
- simplify error handling in dsa_slave_add_cls_matchall

Changes in v2:

- fixed filter removal logic to disable the ingress or egress mirroring
  when there are no longer ports being monitored in ingress or egress

- removed a stray list_head in dsa_port structure that is not used

Tested using the two iproute2 examples:

      tc qdisc  add dev eth1 handle ffff: ingress
      tc filter add dev eth1 parent ffff:           \
               matchall skip_sw                      \
               action mirred egress mirror           \
               dev eth2
      tc qdisc add dev eth1 handle 1: root prio
      tc filter add dev eth1 parent 1:               \
               matchall skip_sw                       \
               action mirred egress mirror            \
               dev eth2
====================

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=1930b60352e7e195f55b27cde15d2a8f43342a8b'>Diffstat</a> (limited to 'net/sunrpc/xprtrdma/verbs.c')</div><table summary='diffstat' class='diffstat'>