linux-kernel - Re: [PATCH 1/2] perf daemon: Fix control fifo permissions

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Date:   Tue, 2 Mar 2021 09:59:00 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH 1/2] perf daemon: Fix control fifo permissions

Em Mon, Mar 01, 2021 at 01:25:09PM +0100, Jiri Olsa escreveu:
> Add proper mode for mkfifo calls to get read and
> write permissions for user. We can't use O_RDWR
> in here, changing to standard permission value.

Thanks, applied both patches to perf/urgent.

- Arnaldo

 
> Fixes: 6a6d1804a190 ("perf daemon: Set control fifo for session")
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/builtin-daemon.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
> index 617feaf020f6..8f0ed2e59280 100644
> --- a/tools/perf/builtin-daemon.c
> +++ b/tools/perf/builtin-daemon.c
> @@ -373,12 +373,12 @@ static int daemon_session__run(struct daemon_session *session,
>  	dup2(fd, 2);
>  	close(fd);
>  
> -	if (mkfifo(SESSION_CONTROL, O_RDWR) && errno != EEXIST) {
> +	if (mkfifo(SESSION_CONTROL, 0600) && errno != EEXIST) {
>  		perror("failed: create control fifo");
>  		return -1;
>  	}
>  
> -	if (mkfifo(SESSION_ACK, O_RDWR) && errno != EEXIST) {
> +	if (mkfifo(SESSION_ACK, 0600) && errno != EEXIST) {
>  		perror("failed: create ack fifo");
>  		return -1;
>  	}
> -- 
> 2.29.2
> 

-- 

- Arnaldo