@@ -24,6 +24,9 @@ struct __kernel_sockaddr_storage {
#include <linux/types.h> /* pid_t */
#include <linux/compiler.h> /* __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);
@@ -110,6 +110,7 @@
#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>
@@ -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)
{
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 <ebiederm@xmission.com> --- include/linux/socket.h | 5 +++++ net/core/sock.c | 14 ++++++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-)