Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755300Ab1EGC0M (ORCPT ); Fri, 6 May 2011 22:26:12 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:35759 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754774Ab1EGCZ5 (ORCPT ); Fri, 6 May 2011 22:25:57 -0400 From: "Eric W. Biederman" To: Cc: , , , jamal , Daniel Lezcano , Linux Containers , Renato Westphal , "Eric W. Biederman" Subject: [PATCH 5/7] ns proc: Add support for the ipc namespace Date: Fri, 6 May 2011 19:24:59 -0700 Message-Id: <1304735101-1824-5-git-send-email-ebiederm@xmission.com> X-Mailer: git-send-email 1.7.5.1.217.g4e3aa In-Reply-To: <1304735101-1824-1-git-send-email-ebiederm@xmission.com> References: <1304735101-1824-1-git-send-email-ebiederm@xmission.com> X-XM-SPF: eid=;;;mid=;;;hst=in02.mta.xmission.com;;;ip=98.207.153.68;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX19ClwsWnPNOWxyQxgmRlUPRZeZ1k61UGRg= X-SA-Exim-Connect-IP: 98.207.153.68 X-SA-Exim-Mail-From: ebiederm@xmission.com X-SA-Exim-Scanned: No (on in02.mta.xmission.com); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2439 Lines: 93 Signed-off-by: Eric W. Biederman --- fs/proc/namespaces.c | 3 +++ include/linux/proc_fs.h | 1 + ipc/namespace.c | 37 +++++++++++++++++++++++++++++++++++++ 3 files changed, 41 insertions(+), 0 deletions(-) diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index b017181..f18d6d5 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 52aa89d..a23f0b7 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -267,6 +267,7 @@ struct proc_ns_operations { }; extern const struct proc_ns_operations netns_operations; extern const struct proc_ns_operations utsns_operations; +extern const struct proc_ns_operations ipcns_operations; union proc_op { int (*proc_get_link)(struct inode *, struct path *); diff --git a/ipc/namespace.c b/ipc/namespace.c index 8054c8e..ce0a647 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "util.h" @@ -140,3 +141,39 @@ void put_ipc_ns(struct ipc_namespace *ns) free_ipc_ns(ns); } } + +static void *ipcns_get(struct task_struct *task) +{ + struct ipc_namespace *ns = NULL; + struct nsproxy *nsproxy; + + rcu_read_lock(); + nsproxy = task_nsproxy(task); + if (nsproxy) + ns = get_ipc_ns(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 = "ipc", + .type = CLONE_NEWIPC, + .get = ipcns_get, + .put = ipcns_put, + .install = ipcns_install, +}; -- 1.6.5.2.143.g8cc62 -- 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/