/* Copyright (c) 2016, Facebook
 *
 * 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 <linux/version.h>
#include <uapi/linux/bpf.h>
#include <uapi/linux/perf_event.h>
#include "bpf_helpers.h"

struct bpf_map_def SEC("maps") my_map = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(long),
	.value_size = sizeof(long),
	.max_entries = 1024,
};
struct bpf_map_def SEC("maps") my_map2 = {
	.type = BPF_MAP_TYPE_PERCPU_HASH,
	.key_size = sizeof(long),
	.value_size = sizeof(long),
	.max_entries = 1024,
};

struct bpf_map_def SEC("maps") stackmap = {
	.type = BPF_MAP_TYPE_STACK_TRACE,
	.key_size = sizeof(u32),
	.value_size = PERF_MAX_STACK_DEPTH * sizeof(u64),
	.max_entries = 10000,
};

#define PROG(foo) \
int foo(struct pt_regs *ctx) \
{ \
	long v = PT_REGS_IP(ctx), *val; \
\
	val = bpf_map_lookup_elem(&my_map, &v); \
	bpf_map_update_elem(&my_map, &v, &v, BPF_ANY); \
	bpf_map_update_elem(&my_map2, &v, &v, BPF_ANY); \
	bpf_map_delete_elem(&my_map2, &v); \
	bpf_get_stackid(ctx, &stackmap, BPF_F_REUSE_STACKID); \
	return 0; \
}

/* add kprobes to all possible *spin* functions */
SEC("kprobe/spin_unlock")PROG(p1)
SEC("kprobe/spin_lock")PROG(p2)
SEC("kprobe/mutex_spin_on_owner")PROG(p3)
SEC("kprobe/rwsem_spin_on_owner")PROG(p4)
SEC("kprobe/spin_unlock_irqrestore")PROG(p5)
SEC("kprobe/_raw_spin_unlock_irqrestore")PROG(p6)
SEC("kprobe/_raw_spin_unlock_bh")PROG(p7)
SEC("kprobe/_raw_spin_unlock")PROG(p8)
SEC("kprobe/_raw_spin_lock_irqsave")PROG(p9)
SEC("kprobe/_raw_spin_trylock_bh")PROG(p10)
SEC("kprobe/_raw_spin_lock_irq")PROG(p11)
SEC("kprobe/_raw_spin_trylock")PROG(p12)
SEC("kprobe/_raw_spin_lock")PROG(p13)
SEC("kprobe/_raw_spin_lock_bh")PROG(p14)
/* and to inner bpf helpers */
SEC("kprobe/htab_map_update_elem")PROG(p15)
SEC("kprobe/__htab_percpu_map_update_elem")PROG(p16)
SEC("kprobe/htab_map_alloc")PROG(p17)

char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
rivate-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/trace/events/cgroup.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>trace</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>events</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>cgroup.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='047487241ff59374fded8c477f21453681f5995c'/><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>Liam R. Howlett &lt;Liam.Howlett@Oracle.com&gt;</td><td class='right'>2017-01-17 10:59:03 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 14:27:54 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>047487241ff59374fded8c477f21453681f5995c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/trace/events/cgroup.h?id=047487241ff59374fded8c477f21453681f5995c'>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=047487241ff59374fded8c477f21453681f5995c'>1c2616bd373ce5ea28aac2a53e32f5b5834901ce</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c'>include/trace/events/cgroup.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=7a7dc961a28b965a0d0303c2e989df17b411708b'>7a7dc961a28b965a0d0303c2e989df17b411708b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/trace/events/cgroup.h?h=nds-private-remove&amp;id=047487241ff59374fded8c477f21453681f5995c&amp;id2=7a7dc961a28b965a0d0303c2e989df17b411708b'>diff</a>)</td></tr></table>
<div class='commit-subject'>sparc64: Handle PIO &amp; MEM non-resumable errors.</div><div class='commit-msg'>User processes trying to access an invalid memory address via PIO will
receive a SIGBUS signal instead of causing a panic.  Memory errors will
receive a SIGKILL since a SIGBUS may result in a coredump which may
attempt to repeat the faulting access.

Signed-off-by: Liam R. Howlett &lt;Liam.Howlett@Oracle.com&gt;
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=047487241ff59374fded8c477f21453681f5995c'>Diffstat</a> (limited to 'include/trace/events/cgroup.h')</div><table summary='diffstat' class='diffstat'>