sock: Introduce cred_to_ucred
[linux-3.10.git] / net / core / sock.c
index f9ce0db..db8335a 100644 (file)
 #include <linux/tcp.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
+#include <linux/user_namespace.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -749,6 +750,19 @@ 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)
 {