From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: [PATCH 3/8] sock: Introduce cred_to_ucred Date: Sun, 13 Jun 2010 06:28:59 -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 "Sun\, 13 Jun 2010 06\:25\:32 -0700") Sender: netdev-owner@vger.kernel.org To: David Miller Cc: Serge Hallyn , Linux Containers , Daniel Lezcano , netdev@vger.kernel.org, Pavel Emelyanov List-Id: containers.vger.kernel.org To keep the coming code clear and to allow both the sock code and the scm code to share the logic introduce a fuction to translate from struct cred to struct ucred. Signed-off-by: Eric W. Biederman --- include/linux/socket.h | 5 +++++ net/core/sock.c | 14 ++++++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/include/linux/socket.h b/include/linux/socket.h index 032a19e..a2fada9 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -24,6 +24,9 @@ struct __kernel_sockaddr_storage { #include /* pid_t */ #include /* __user */ +struct pid; +struct cred; + #define __sockaddr_check_size(size) \ BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) @@ -309,6 +312,8 @@ struct ucred { #define IPX_TYPE 1 #ifdef __KERNEL__ +extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred); + extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len); extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov, int offset, int len); diff --git a/net/core/sock.c b/net/core/sock.c index 7effa1e..9e229d8 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -110,6 +110,7 @@ #include #include #include +#include #include #include @@ -734,6 +735,19 @@ set_rcvbuf: EXPORT_SYMBOL(sock_setsockopt); +void cred_to_ucred(struct pid *pid, const struct cred *cred, + struct ucred *ucred) +{ + ucred->pid = pid_vnr(pid); + ucred->uid = ucred->gid = -1; + if (cred) { + struct user_namespace *current_ns = current_user_ns(); + + ucred->uid = user_ns_map_uid(current_ns, cred, cred->euid); + ucred->gid = user_ns_map_gid(current_ns, cred, cred->egid); + } +} + int sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { -- 1.6.5.2.143.g8cc62