From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Eric W. Biederman" Subject: [PATCH 12/21] userns: Implement sk_user_ns Date: Mon, 13 Aug 2012 13:18:26 -0700 Message-ID: <1344889115-21610-12-git-send-email-ebiederm@xmission.com> References: <87ehnav9n5.fsf@xmission.com> <1344889115-21610-1-git-send-email-ebiederm@xmission.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: "Eric W. Biederman" , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Miller To: Return-path: In-Reply-To: <1344889115-21610-1-git-send-email-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: netdev.vger.kernel.org From: "Eric W. Biederman" Add a helper sk_user_ns to make it easy to find the user namespace of the process that opened a socket. Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman --- include/net/sock.h | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index 65c3d62..9d43736 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -604,6 +604,15 @@ static inline void sk_add_bind_node(struct sock *sk, #define sk_for_each_bound(__sk, node, list) \ hlist_for_each_entry(__sk, node, list, sk_bind_node) +static inline struct user_namespace *sk_user_ns(struct sock *sk) +{ + /* Careful only use this in a context where these parameters + * can not change and must all be valid, such as recvmsg from + * userspace. + */ + return sk->sk_socket->file->f_cred->user_ns; +} + /* Sock flags */ enum sock_flags { SOCK_DEAD, -- 1.7.5.4