Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754576AbaKEKmi (ORCPT ); Wed, 5 Nov 2014 05:42:38 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:28234 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754060AbaKEKmB (ORCPT ); Wed, 5 Nov 2014 05:42:01 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="42891632" From: Chen Hanxiao To: "Eric W. Biederman" , Serge Hallyn , Oleg Nesterov CC: , , David Howells , Richard Weinberger , Pavel Emelyanov , Vasiliy Kulikov , Mateusz Guzik Subject: [PATCH 2/2v6] /proc/PID/status: show all sets of pid according to ns Date: Wed, 5 Nov 2014 18:41:55 +0800 Message-ID: <1415184115-12022-3-git-send-email-chenhanxiao@cn.fujitsu.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1415184115-12022-1-git-send-email-chenhanxiao@cn.fujitsu.com> References: <1415184115-12022-1-git-send-email-chenhanxiao@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.226.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If some issues occurred inside a container guest, host user could not know which process is in trouble just by guest pid: the users of container guest only knew the pid inside containers. This will bring obstacle for trouble shooting. This patch adds four fields: NStgid, NSpid, NSpgid and NSsid: a) In init_pid_ns, nothing changed; b) In one pidns, will tell the pid inside containers: NStgid: 21776 5 1 NSpid: 21776 5 1 NSpgid: 21776 5 1 NSsid: 21729 1 0 ** Process id is 21776 in level 0, 5 in level 1, 1 in level 2. c) If pidns is nested, it depends on which pidns are you in. NStgid: 5 1 NSpid: 5 1 NSpgid: 5 1 NSsid: 1 0 ** Views from level 1 Acked-by: Serge Hallyn Tested-by: Serge Hallyn Signed-off-by: Chen Hanxiao --- No change since v3 v3: add another two fielsd: NSpgid and NSsid. v2: add two new fields: NStgid and NSpid. keep fields of Tgid and Pid unchanged for back compatibility. fs/proc/array.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/fs/proc/array.c b/fs/proc/array.c index cd3653e..c30875d 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -193,6 +193,23 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, from_kgid_munged(user_ns, cred->egid), from_kgid_munged(user_ns, cred->sgid), from_kgid_munged(user_ns, cred->fsgid)); + seq_puts(m, "NStgid:"); + for (g = ns->level; g <= pid->level; g++) + seq_printf(m, "\t%d ", + task_tgid_nr_ns(p, pid->numbers[g].ns)); + seq_puts(m, "\nNSpid:"); + for (g = ns->level; g <= pid->level; g++) + seq_printf(m, "\t%d ", + task_pid_nr_ns(p, pid->numbers[g].ns)); + seq_puts(m, "\nNSpgid:"); + for (g = ns->level; g <= pid->level; g++) + seq_printf(m, "\t%d ", + task_pgrp_nr_ns(p, pid->numbers[g].ns)); + seq_puts(m, "\nNSsid:"); + for (g = ns->level; g <= pid->level; g++) + seq_printf(m, "\t%d ", + task_session_nr_ns(p, pid->numbers[g].ns)); + seq_putc(m, '\n'); task_lock(p); if (p->files) -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/