linux-kernel - [patch 03/11] perf_event_open.2: 4.1 PERF_EVENT_IOC_SET

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Date:	Thu, 23 Jul 2015 13:10:21 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
cc:	linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Olsa <jolsa@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Vince Weaver <vincent.weaver@...ne.edu>
Subject: [patch 03/11] perf_event_open.2: 4.1 PERF_EVENT_IOC_SET_BPF
 support


This manpage patch relates to the addition of the
PERF_EVENT_IOC_SET_BPF ioctl in the following commit:

	commit 2541517c32be2531e0da59dfd7efc1ce844644f5
	Author: Alexei Starovoitov <ast@...mgrid.com>
    
	tracing, perf: Implement BPF programs attached to kprobes

	Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>
	Reviewed-by: Steven Rostedt <rostedt@...dmis.org>
	Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
	Cc: Andrew Morton <akpm@...ux-foundation.org>
	Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
	Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
	Cc: Daniel Borkmann <daniel@...earbox.net>
	Cc: David S. Miller <davem@...emloft.net>
	Cc: Jiri Olsa <jolsa@...hat.com>
	Cc: Linus Torvalds <torvalds@...ux-foundation.org>
	Cc: Namhyung Kim <namhyung@...nel.org>
	Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
	Cc: Peter Zijlstra <peterz@...radead.org>
	Link: http://lkml.kernel.org/r/1427312966-8434-4-git-send-email-ast@plumgrid.com
	Signed-off-by: Ingo Molnar <mingo@...nel.org>


Signed-off-by: Vince Weaver <vincent.weaver@...ne.edu>

diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
index a6b90ec..09eda9a 100644
--- a/man2/perf_event_open.2
+++ b/man2/perf_event_open.2
@@ -2570,6 +2570,19 @@ This returns the event ID value for the given event file descriptor.
 
 The argument is a pointer to a 64-bit unsigned integer
 to hold the result.
+.TP
+.BR PERF_EVENT_IOC_SET_BPF " (since Linux 4.1)"
+.\" commit 2541517c32be2531e0da59dfd7efc1ce844644f5
+This allows attaching a Berkeley Packet Filter (BPF)
+program to an existing kprobe tracepoint event.
+You need
+.B CAP_SYS_ADMIN
+privileges to use this ioctl.
+
+The argument is a BPF program file descriptor that was created by
+a previous
+.BR bpf (2)
+system call.
 .SS Using prctl
 A process can enable or disable all the event groups that are
 attached to it using the
--
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