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authorEric W. Biederman <ebiederm@xmission.com>2010-06-13 07:28:59 +0400
committerDavid S. Miller <davem@davemloft.net>2010-06-17 01:55:35 +0400
commit3f551f9436c05a3b5eccdd6e94733df5bb98d2a5 (patch)
treeee5a9148797994682a4553e817e96b721303f3ec /net/core/sock.c
parent5c1469de7545a35a16ff2b902e217044a7d2f8a5 (diff)
downloadlinux-3f551f9436c05a3b5eccdd6e94733df5bb98d2a5.tar.xz
sock: Introduce cred_to_ucred
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> Acked-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
-rw-r--r--net/core/sock.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index f9ce0db41cd6..db8335ad7559 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -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>
@@ -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)
{