[PATCH 12/21] userns: Implement sk_user_ns
From: Eric W. Biederman <hidden>
Date: 2012-08-13 20:24:23
Also in:
lkml
Subsystem:
networking [general], networking [sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
From: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> 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 <redacted> Signed-off-by: Eric W. Biederman <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> --- 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,
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1.7.5.4