#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";
='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pcmcia?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>pcmcia</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pcmcia/vx?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>vx</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pcmcia/vx/vxpocket.c?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>vxpocket.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='0b3589be9b98994ce3d5aeca52445d1f5627c4ba'/><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>Peter Zijlstra &lt;peterz@infradead.org&gt;</td><td class='right'>2017-01-26 23:15:08 +0100</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-01-30 11:41:26 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pcmcia/vx/vxpocket.c?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>0b3589be9b98994ce3d5aeca52445d1f5627c4ba</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pcmcia/vx/vxpocket.c?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>85d0d9b3ac902af2c938b19a566884caf8d00323</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pcmcia/vx/vxpocket.c?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>sound/pcmcia/vx/vxpocket.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pcmcia/vx/vxpocket.c?id=a76a82a3e38c8d3fb6499e3dfaeb0949241ab588'>a76a82a3e38c8d3fb6499e3dfaeb0949241ab588</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pcmcia/vx/vxpocket.c?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba&amp;id2=a76a82a3e38c8d3fb6499e3dfaeb0949241ab588'>diff</a>)</td></tr></table>
<div class='commit-subject'>perf/core: Fix PERF_RECORD_MMAP2 prot/flags for anonymous memory</div><div class='commit-msg'>Andres reported that MMAP2 records for anonymous memory always have
their protection field 0.

Turns out, someone daft put the prot/flags generation code in the file
branch, leaving them unset for anonymous memory.

Reported-by: Andres Freund &lt;andres@anarazel.de&gt;
Signed-off-by: Peter Zijlstra (Intel) &lt;peterz@infradead.org&gt;
Cc: Alexander Shishkin &lt;alexander.shishkin@linux.intel.com&gt;
Cc: Arnaldo Carvalho de Melo &lt;acme@redhat.com&gt;
Cc: Don Zickus &lt;dzickus@redhat.com
Cc: Jiri Olsa &lt;jolsa@redhat.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: Stephane Eranian &lt;eranian@gmail.com&gt;
Cc: Stephane Eranian &lt;eranian@google.com&gt;
Cc: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: acme@kernel.org
Cc: anton@ozlabs.org
Cc: namhyung@kernel.org
Cc: stable@vger.kernel.org # v3.16+
Fixes: f972eb63b100 ("perf: Pass protection and flags bits through mmap2 interface")
Link: http://lkml.kernel.org/r/20170126221508.GF6536@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>Diffstat</a> (limited to 'sound/pcmcia/vx/vxpocket.c')</div><table summary='diffstat' class='diffstat'>