From: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
Serge Hallyn <serge.hallyn@ubuntu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>
Cc: <containers@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>,
David Howells <dhowells@redhat.com>,
Vasiliy Kulikov <segooon@gmail.com>,
Mateusz Guzik <mguzik@redhat.com>,
Oleg Nesterov <oleg@redhat.com>,
Richard Weinberger <richard.weinberger@gmail.com>
Subject: [resend][PATCH v9 2/3] /proc/PID/status: show all sets of pid according to ns
Date: Tue, 23 Dec 2014 18:20:38 +0800 [thread overview]
Message-ID: <1419330039-29207-3-git-send-email-chenhanxiao@cn.fujitsu.com> (raw)
In-Reply-To: <1419330039-29207-1-git-send-email-chenhanxiao@cn.fujitsu.com>
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 <serge.hallyn@canonical.com>
Tested-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
---
v9: rebased on 3.19-rc1
No change from v4-v8
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 | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index bd117d0..35205d4 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -208,6 +208,22 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
from_kgid_munged(user_ns, GROUP_AT(group_info, g)));
put_cred(cred);
+ seq_puts(m, "\nNStgid:");
+ 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');
}
--
1.9.3
next prev parent reply other threads:[~2014-12-23 10:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-23 10:20 [resend][PATCH v9 0/3] ns, procfs: pid conversion between ns and showing pidns hierarchy Chen Hanxiao
2014-12-23 10:20 ` [resend][PATCH v9 1/3] procfs: show hierarchy of pid namespace Chen Hanxiao
2014-12-30 1:17 ` Chen, Hanxiao
2014-12-30 5:54 ` Eric W. Biederman
2014-12-23 10:20 ` Chen Hanxiao [this message]
2014-12-30 5:39 ` [resend][PATCH v9 2/3] /proc/PID/status: show all sets of pid according to ns Eric W. Biederman
2014-12-23 10:20 ` [PATCH v9 3/3] Documentation: add docs for /proc/pidns_hierarchy Chen Hanxiao
[not found] <55349719.6775592.1423011445985.JavaMail.zimbra@redhat.com>
2015-02-04 1:12 ` [resend][PATCH v9 2/3] /proc/PID/status: show all sets of pid according to ns Nathan Scott
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1419330039-29207-3-git-send-email-chenhanxiao@cn.fujitsu.com \
--to=chenhanxiao@cn.fujitsu.com \
--cc=akpm@linux-foundation.org \
--cc=containers@lists.linux-foundation.org \
--cc=dhowells@redhat.com \
--cc=ebiederm@xmission.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mguzik@redhat.com \
--cc=oleg@redhat.com \
--cc=richard.weinberger@gmail.com \
--cc=segooon@gmail.com \
--cc=serge.hallyn@ubuntu.com \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).