Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763061AbXK2R4L (ORCPT ); Thu, 29 Nov 2007 12:56:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759006AbXK2Rzy (ORCPT ); Thu, 29 Nov 2007 12:55:54 -0500 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:48119 "EHLO ebiederm.dsl.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759739AbXK2Rzw (ORCPT ); Thu, 29 Nov 2007 12:55:52 -0500 From: ebiederm@xmission.com (Eric W. Biederman) To: Herbert Xu , Andrew Morton Cc: Serge Hallyn , Daniel Lezcano , Cedric Le Goater , Linux Containers , Pavel Emelyanov , , , David Miller Subject: [PATCH 4/4] net: Implement the per network namespace sysctl infrastructure References: <4742C73C.3010904@openvz.org> Date: Thu, 29 Nov 2007 10:53:29 -0700 In-Reply-To: (Eric W. Biederman's message of "Thu, 29 Nov 2007 10:51:50 -0700") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3478 Lines: 121 The user interface is: register_net_sysctl_table and unregister_net_sysctl_table. Very much like the current interface except there is a network namespace parameter. With this any sysctl registered with register_net_sysctl_table will only show up to tasks in the same network namespace. All other sysctls continue to be globally visible. Signed-off-by: Eric W. Biederman --- include/net/net_namespace.h | 9 +++++++ net/sysctl_net.c | 57 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 0 deletions(-) diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 4d0d634..235214c 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -25,6 +25,8 @@ struct net { struct proc_dir_entry *proc_net_stat; struct proc_dir_entry *proc_net_root; + struct list_head sysctl_table_headers; + struct net_device *loopback_dev; /* The loopback */ struct list_head dev_base_head; @@ -144,4 +146,11 @@ extern void unregister_pernet_subsys(struct pernet_operations *); extern int register_pernet_device(struct pernet_operations *); extern void unregister_pernet_device(struct pernet_operations *); +struct ctl_path; +struct ctl_table; +struct ctl_table_header; +extern struct ctl_table_header *register_net_sysctl_table(struct net *net, + const struct ctl_path *path, struct ctl_table *table); +extern void unregister_net_sysctl_table(struct ctl_table_header *header); + #endif /* __NET_NET_NAMESPACE_H */ diff --git a/net/sysctl_net.c b/net/sysctl_net.c index cd4eafb..c50c793 100644 --- a/net/sysctl_net.c +++ b/net/sysctl_net.c @@ -14,6 +14,7 @@ #include #include +#include #include @@ -54,3 +55,59 @@ struct ctl_table net_table[] = { #endif { 0 }, }; + +static struct list_head * +net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces) +{ + return &namespaces->net_ns->sysctl_table_headers; +} + +static struct ctl_table_root net_sysctl_root = { + .lookup = net_ctl_header_lookup, +}; + +static int sysctl_net_init(struct net *net) +{ + INIT_LIST_HEAD(&net->sysctl_table_headers); + return 0; +} + +static void sysctl_net_exit(struct net *net) +{ + WARN_ON(!list_empty(&net->sysctl_table_headers)); + return; +} + +static struct pernet_operations sysctl_pernet_ops = { + .init = sysctl_net_init, + .exit = sysctl_net_exit, +}; + +static __init int sysctl_init(void) +{ + int ret; + ret = register_pernet_subsys(&sysctl_pernet_ops); + if (ret) + goto out; + register_sysctl_root(&net_sysctl_root); +out: + return ret; +} +subsys_initcall(sysctl_init); + +struct ctl_table_header *register_net_sysctl_table(struct net *net, + const struct ctl_path *path, struct ctl_table *table) +{ + struct nsproxy namespaces; + namespaces = *current->nsproxy; + namespaces.net_ns = net; + return __register_sysctl_paths(&net_sysctl_root, + &namespaces, path, table); +} +EXPORT_SYMBOL_GPL(register_net_sysctl_table); + +void unregister_net_sysctl_table(struct ctl_table_header *header) +{ + return unregister_sysctl_table(header); +} +EXPORT_SYMBOL_GPL(unregister_net_sysctl_table); -- 1.5.3.rc6.17.g1911 - 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/