From c336d148adc4181f31741ae066df41429be64b67 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Thu, 24 May 2012 17:56:43 -0600 Subject: [PATCH] userns: Implement sk_user_ns Add a helper sk_user_ns to make it easy to find the user namespace of the process that opened a socket. Acked-by: David S. Miller Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman --- include/net/sock.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/net/sock.h b/include/net/sock.h index 65c3d62bfa5a..9d43736a869d 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, -- 2.34.1