net: Make setsockopt() optlen be unsigned.

This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.

Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 03cffd9f64e3..696d6e4ce68a 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -48,13 +48,13 @@ struct inet_connection_sock_af_ops {
         u16         net_header_len;
         u16         sockaddr_len;
         int         (*setsockopt)(struct sock *sk, int level, int optname, 
-                                  char __user *optval, int optlen);
+                                  char __user *optval, unsigned int optlen);
         int         (*getsockopt)(struct sock *sk, int level, int optname, 
                                   char __user *optval, int __user *optlen);
 #ifdef CONFIG_COMPAT
         int         (*compat_setsockopt)(struct sock *sk,
                                 int level, int optname,
-                                char __user *optval, int optlen);
+                                char __user *optval, unsigned int optlen);
         int         (*compat_getsockopt)(struct sock *sk,
                                 int level, int optname,
                                 char __user *optval, int __user *optlen);
@@ -332,5 +332,5 @@ extern void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);
 extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
                                       char __user *optval, int __user *optlen);
 extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
-                                      char __user *optval, int optlen);
+                                      char __user *optval, unsigned int optlen);
 #endif /* _INET_CONNECTION_SOCK_H */