From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: [PATCH 4/8] ns proc: Add support for the uts namespace Date: Thu, 23 Sep 2010 01:48:22 -0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: (Eric W. Biederman's message of "Thu, 23 Sep 2010 01:45:04 -0700") Sender: netdev-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: Linux Containers , netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, jamal , Daniel Lezcano , Linus Torvalds , Michael Kerrisk , Ulrich Drepper , Al Viro , David Miller , "Serge E. Hallyn" , Pavel Emelyanov , Pavel Emelyanov , Ben Greear , Matt Helsley , Jonathan Corbet , Sukadev Bhattiprolu , Jan Engelhardt , Patrick McHardy List-Id: containers.vger.kernel.org Signed-off-by: Eric W. Biederman --- fs/proc/namespaces.c | 3 +++ include/linux/proc_fs.h | 1 + kernel/utsname.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 36 insertions(+), 0 deletions(-) diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 31e32f3..902443e 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -19,6 +19,9 @@ static const struct proc_ns_operations *ns_entries[] = { #ifdef CONFIG_NET_NS &netns_operations, #endif +#ifdef CONFIG_UTS_NS + &utsns_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 9cd3fae..28b4ffd 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -263,6 +263,7 @@ 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 struct file *proc_ns_fget(int fd); union proc_op { diff --git a/kernel/utsname.c b/kernel/utsname.c index 8a82b4b..ff06086 100644 --- a/kernel/utsname.c +++ b/kernel/utsname.c @@ -14,6 +14,7 @@ #include #include #include +#include static struct uts_namespace *create_uts_ns(void) { @@ -73,3 +74,34 @@ void free_uts_ns(struct kref *kref) ns = container_of(kref, struct uts_namespace, kref); kfree(ns); } + +static void *utsns_get(struct task_struct *task) +{ + struct uts_namespace *ns; + rcu_read_lock(); + ns = task->nsproxy->uts_ns; + get_uts_ns(ns); + rcu_read_unlock(); + return ns; +} + +static void utsns_put(void *ns) +{ + put_uts_ns(ns); +} + +static int utsns_install(struct nsproxy *nsproxy, void *ns) +{ + get_uts_ns(ns); + put_uts_ns(nsproxy->uts_ns); + nsproxy->uts_ns = ns; + return 0; +} + +const struct proc_ns_operations utsns_operations = { + .name = PROC_NSNAME("uts"), + .get = utsns_get, + .put = utsns_put, + .install = utsns_install, +}; + -- 1.6.5.2.143.g8cc62 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754028Ab0IWIsa (ORCPT ); Thu, 23 Sep 2010 04:48:30 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:57321 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752347Ab0IWIs1 (ORCPT ); Thu, 23 Sep 2010 04:48:27 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Cc: Linux Containers , , netfilter-devel@vger.kernel.org, , jamal , Daniel Lezcano , Linus Torvalds , Michael Kerrisk , Ulrich Drepper , Al Viro , David Miller , "Serge E. Hallyn" , Pavel Emelyanov , Pavel Emelyanov , Ben Greear , Matt Helsley , Jonathan Corbet , Sukadev Bhattiprolu , Jan Engelhardt , Patrick McHardy References: Date: Thu, 23 Sep 2010 01:48:22 -0700 In-Reply-To: (Eric W. Biederman's message of "Thu, 23 Sep 2010 01:45:04 -0700") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in01.mta.xmission.com;;;ip=98.207.157.188;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 98.207.157.188 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 1.5 XMNoVowels Alpha-numberic number with no vowels * -3.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa07 1397; Body=1 Fuz1=1] * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay X-Spam-DCC: XMission; sa07 1397; Body=1 Fuz1=1 X-Spam-Combo: ; X-Spam-Relay-Country: Subject: [PATCH 4/8] ns proc: Add support for the uts namespace X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Fri, 06 Aug 2010 16:31:04 -0600) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Eric W. Biederman --- fs/proc/namespaces.c | 3 +++ include/linux/proc_fs.h | 1 + kernel/utsname.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 36 insertions(+), 0 deletions(-) diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 31e32f3..902443e 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -19,6 +19,9 @@ static const struct proc_ns_operations *ns_entries[] = { #ifdef CONFIG_NET_NS &netns_operations, #endif +#ifdef CONFIG_UTS_NS + &utsns_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 9cd3fae..28b4ffd 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -263,6 +263,7 @@ 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 struct file *proc_ns_fget(int fd); union proc_op { diff --git a/kernel/utsname.c b/kernel/utsname.c index 8a82b4b..ff06086 100644 --- a/kernel/utsname.c +++ b/kernel/utsname.c @@ -14,6 +14,7 @@ #include #include #include +#include static struct uts_namespace *create_uts_ns(void) { @@ -73,3 +74,34 @@ void free_uts_ns(struct kref *kref) ns = container_of(kref, struct uts_namespace, kref); kfree(ns); } + +static void *utsns_get(struct task_struct *task) +{ + struct uts_namespace *ns; + rcu_read_lock(); + ns = task->nsproxy->uts_ns; + get_uts_ns(ns); + rcu_read_unlock(); + return ns; +} + +static void utsns_put(void *ns) +{ + put_uts_ns(ns); +} + +static int utsns_install(struct nsproxy *nsproxy, void *ns) +{ + get_uts_ns(ns); + put_uts_ns(nsproxy->uts_ns); + nsproxy->uts_ns = ns; + return 0; +} + +const struct proc_ns_operations utsns_operations = { + .name = PROC_NSNAME("uts"), + .get = utsns_get, + .put = utsns_put, + .install = utsns_install, +}; + -- 1.6.5.2.143.g8cc62