/* Copyright (c) 2013-2015 PLUMgrid, http://plumgrid.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <uapi/linux/bpf.h>
#include <linux/version.h>
#include "bpf_helpers.h"

#define _(P) ({typeof(P) val = 0; bpf_probe_read(&val, sizeof(val), &P); val;})

/* kprobe is NOT a stable ABI
 * kernel functions can be removed, renamed or completely change semantics.
 * Number of arguments and their positions can change, etc.
 * In such case this bpf+kprobe example will no longer be meaningful
 */
SEC("kprobe/__netif_receive_skb_core")
int bpf_prog1(struct pt_regs *ctx)
{
	/* attaches to kprobe netif_receive_skb,
	 * looks for packets on loobpack device and prints them
	 */
	char devname[IFNAMSIZ];
	struct net_device *dev;
	struct sk_buff *skb;
	int len;

	/* non-portable! works for the given kernel only */
	skb = (struct sk_buff *) PT_REGS_PARM1(ctx);
	dev = _(skb->dev);
	len = _(skb->len);

	bpf_probe_read(devname, sizeof(devname), dev->name);

	if (devname[0] == 'l' && devname[1] == 'o') {
		char fmt[] = "skb %p len %d\n";
		/* using bpf_trace_printk() for DEBUG ONLY */
		bpf_trace_printk(fmt, sizeof(fmt), skb, len);
	}

	return 0;
}

char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
d></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/media/xilinx-vip.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/media?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>media</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>xilinx-vip.h</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='e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'/><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>George Spelvin &lt;linux@sciencehorizons.net&gt;</td><td class='right'>2016-05-29 08:05:56 -0400</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-05-29 07:33:47 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/media/xilinx-vip.h?id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>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=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>0012599b46ccd837c6ce808b808456777f7bb92f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>include/dt-bindings/media/xilinx-vip.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=f2a031b66ec6da1512f9db228e4174ad2c7d2688'>f2a031b66ec6da1512f9db228e4174ad2c7d2688</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/media/xilinx-vip.h?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7&amp;id2=f2a031b66ec6da1512f9db228e4174ad2c7d2688'>diff</a>)</td></tr></table>
<div class='commit-subject'>hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS</div><div class='commit-msg'>The self-test was updated to cover zero-length strings; the function
needs to be updated, too.

Reported-by: Geert Uytterhoeven &lt;geert@linux-m68k.org&gt;
Signed-off-by: George Spelvin &lt;linux@sciencehorizons.net&gt;
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e0ab7af9bd1c25e40b9a1dbeb2a634b88267b9d7'>Diffstat</a> (limited to 'include/dt-bindings/media/xilinx-vip.h')</div><table summary='diffstat' class='diffstat'>