From: ebiederm@xmission.com (Eric W. Biederman)
To: <linux-kernel@vger.kernel.org>
Cc: Linux Containers <containers@lists.osdl.org>,
<netdev@vger.kernel.org>,
netfilter-devel@vger.kernel.org, <linux-fsdevel@vger.kernel.org>,
jamal <hadi@cyberus.ca>, Daniel Lezcano <daniel.lezcano@free.fr>,
Linus Torvalds <torvalds@linux-foundation.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Ulrich Drepper <drepper@gmail.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
David Miller <davem@davemloft.net>,
"Serge E. Hallyn" <serge@hallyn.com>,
Pavel Emelyanov <xemul@openvz.org>,
Pavel Emelyanov <xemul@parallels.com>,
Ben Greear <greearb@candelatech.com>,
Matt Helsley <matthltc@us.ibm.com>,
Jonathan Corbet <corbet@lwn.net>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
Jan Engelhardt <jengelh@medozas.de>,
Patrick McHardy <kaber@trash.net>
Subject: [PATCH 5/8] ns proc: Add support for the ipc namespace
Date: Thu, 23 Sep 2010 01:49:59 -0700 [thread overview]
Message-ID: <m1sk10q1xk.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <m1ocborgq7.fsf@fess.ebiederm.org> (Eric W. Biederman's message of "Thu, 23 Sep 2010 01:45:04 -0700")
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
fs/proc/namespaces.c | 3 +++
include/linux/proc_fs.h | 1 +
ipc/namespace.c | 31 +++++++++++++++++++++++++++++++
3 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 902443e..2f503b5 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -22,6 +22,9 @@ static const struct proc_ns_operations *ns_entries[] = {
#ifdef CONFIG_UTS_NS
&utsns_operations,
#endif
+#ifdef CONFIG_IPC_NS
+ &ipcns_operations,
+#endif
};
static const struct file_operations ns_file_operations = {
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 28b4ffd..9a9ef31 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -264,6 +264,7 @@ struct proc_ns_operations {
#define PROC_NSNAME(NAME) { .name = (NAME), .len = (sizeof(NAME) - 1), }
extern const struct proc_ns_operations netns_operations;
extern const struct proc_ns_operations utsns_operations;
+extern const struct proc_ns_operations ipcns_operations;
extern struct file *proc_ns_fget(int fd);
union proc_op {
diff --git a/ipc/namespace.c b/ipc/namespace.c
index a1094ff..2c5947f 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -11,6 +11,7 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/mount.h>
+#include <linux/proc_fs.h>
#include "util.h"
@@ -132,3 +133,33 @@ void put_ipc_ns(struct ipc_namespace *ns)
free_ipc_ns(ns);
}
}
+
+static void *ipcns_get(struct task_struct *task)
+{
+ struct ipc_namespace *ns;
+ rcu_read_lock();
+ ns = get_ipc_ns(task->nsproxy->ipc_ns);
+ rcu_read_unlock();
+ return ns;
+}
+
+static void ipcns_put(void *ns)
+{
+ return put_ipc_ns(ns);
+}
+
+static int ipcns_install(struct nsproxy *nsproxy, void *ns)
+{
+ /* Ditch state from the old ipc namespace */
+ exit_sem(current);
+ put_ipc_ns(nsproxy->ipc_ns);
+ nsproxy->ipc_ns = get_ipc_ns(ns);
+ return 0;
+}
+
+const struct proc_ns_operations ipcns_operations = {
+ .name = PROC_NSNAME("ipc"),
+ .get = ipcns_get,
+ .put = ipcns_put,
+ .install = ipcns_install,
+};
--
1.6.5.2.143.g8cc62
next prev parent reply other threads:[~2010-09-23 8:50 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 8:45 [ABI REVIEW][PATCH 0/8] Namespace file descriptors Eric W. Biederman
2010-09-23 8:46 ` [PATCH 1/8] ns: proc files for namespace naming policy Eric W. Biederman
2010-09-23 8:46 ` [PATCH 2/8] ns: Introduce the setns syscall Eric W. Biederman
2010-09-23 8:47 ` [PATCH 3/8] ns proc: Add support for the network namespace Eric W. Biederman
2010-09-23 11:27 ` Louis Rilling
2010-09-23 16:00 ` Eric W. Biederman
2010-09-23 8:48 ` [PATCH 4/8] ns proc: Add support for the uts namespace Eric W. Biederman
2010-09-23 8:49 ` Eric W. Biederman [this message]
2010-09-23 8:50 ` [PATCH 6/8] ns proc: Add support for the mount namespace Eric W. Biederman
2010-09-23 8:51 ` [PATCH 7/8] net: Allow setting the network namespace by fd Eric W. Biederman
2010-09-23 9:41 ` Eric Dumazet
2010-09-23 16:03 ` Eric W. Biederman
2010-09-23 11:22 ` jamal
2010-09-23 14:58 ` David Lamparter
2010-09-24 11:51 ` jamal
2010-09-24 12:57 ` David Lamparter
2010-09-24 13:32 ` jamal
2010-09-24 14:09 ` David Lamparter
2010-09-24 14:16 ` jamal
2010-09-23 15:14 ` Eric W. Biederman
2010-09-23 14:22 ` Brian Haley
2010-09-23 16:16 ` Eric W. Biederman
2010-09-24 13:46 ` Daniel Lezcano
2010-09-23 8:51 ` [PATCH 8/8] net: Implement socketat Eric W. Biederman
2010-09-23 8:56 ` Pavel Emelyanov
2010-09-23 11:19 ` jamal
2010-09-23 11:33 ` Pavel Emelyanov
2010-09-23 11:40 ` jamal
2010-09-23 11:53 ` Pavel Emelyanov
2010-09-23 12:11 ` jamal
2010-09-23 12:34 ` Pavel Emelyanov
2010-09-23 14:54 ` David Lamparter
2010-09-23 15:00 ` Eric W. Biederman
2010-10-02 21:13 ` Daniel Lezcano
2010-10-03 13:44 ` jamal
2010-10-04 10:13 ` Daniel Lezcano
2010-10-04 19:07 ` Eric W. Biederman
2010-10-15 12:30 ` netns patches WAS( " jamal
2010-10-26 20:52 ` jamal
2010-10-27 0:27 ` Eric W. Biederman
2010-09-23 15:18 ` [ABI REVIEW][PATCH 0/8] Namespace file descriptors David Lamparter
2010-09-23 16:32 ` Eric W. Biederman
2010-09-23 16:49 ` David Lamparter
2010-09-24 13:02 ` Andrew Lutomirski
2010-09-24 13:49 ` Daniel Lezcano
2010-09-24 17:06 ` Eric W. Biederman
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