@@ -509,8 +509,9 @@ int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *usersta
}
EXPORT_SYMBOL(compat_sock_get_timestampns);
-COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
- char __user *, optval, int __user *, optlen)
+static int __compat_sys_getsockopt(int fd, int level, int optname,
+ char __user *optval,
+ int __user *optlen)
{
int err;
struct socket *sock = sockfd_lookup(fd, &err);
@@ -536,6 +537,12 @@ COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
return err;
}
+COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
+ char __user *, optval, int __user *, optlen)
+{
+ return __compat_sys_getsockopt(fd, level, optname, optval, optlen);
+}
+
struct compat_group_req {
__u32 gr_interface;
struct __kernel_sockaddr_storage gr_group
@@ -874,8 +881,9 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
compat_ptr(a[3]), a[4]);
break;
case SYS_GETSOCKOPT:
- ret = compat_sys_getsockopt(a0, a1, a[2],
- compat_ptr(a[3]), compat_ptr(a[4]));
+ ret = __compat_sys_getsockopt(a0, a1, a[2],
+ compat_ptr(a[3]),
+ compat_ptr(a[4]));
break;
case SYS_SENDMSG:
ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
Using the net-internal helper __compat_sys_getsockopt() allows us to avoid the internal calls to the compat_sys_getsockopt() syscall. This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> --- net/compat.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)