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net: remove compat_sys_{get,set}sockopt

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Now that the ->compat_{get,set}sockopt proto_ops methods are gone
there is no good reason left to keep the compat syscalls separate.

This fixes the odd use of unsigned int for the compat_setsockopt
optlen and the missing sock_use_custom_sol_socket.

It would also easily allow running the eBPF hooks for the compat
syscalls, but such a large change in behavior does not belong into
a consolidation patch like this one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-07-17 08:23:15 +02:00
committed by David S. Miller
parent 8c918ffbba
commit 55db9c0e85
20 changed files with 62 additions and 125 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
net/compat.c
View File

@@ -335,77 +335,6 @@ void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
__scm_destroy(scm);
}
static int __compat_sys_setsockopt(int fd, int level, int optname,
char __user *optval, unsigned int optlen)
{
int err;
struct socket *sock;
if (optlen > INT_MAX)
return -EINVAL;
sock = sockfd_lookup(fd, &err);
if (sock) {
err = security_socket_setsockopt(sock, level, optname);
if (err) {
sockfd_put(sock);
return err;
}
if (level == SOL_SOCKET)
err = sock_setsockopt(sock, level,
optname, optval, optlen);
else if (sock->ops->compat_setsockopt)
err = sock->ops->compat_setsockopt(sock, level,
optname, optval, optlen);
else
err = sock->ops->setsockopt(sock, level,
optname, optval, optlen);
sockfd_put(sock);
}
return err;
}
COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
char __user *, optval, unsigned int, optlen)
{
return __compat_sys_setsockopt(fd, level, optname, optval, 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);
if (sock) {
err = security_socket_getsockopt(sock, level, optname);
if (err) {
sockfd_put(sock);
return err;
}
if (level == SOL_SOCKET)
err = sock_getsockopt(sock, level,
optname, optval, optlen);
else if (sock->ops->compat_getsockopt)
err = sock->ops->compat_getsockopt(sock, level,
optname, optval, optlen);
else
err = sock->ops->getsockopt(sock, level,
optname, optval, optlen);
sockfd_put(sock);
}
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);
}
/* Argument list sizes for compat_sys_socketcall */
#define AL(x) ((x) * sizeof(u32))
static unsigned char nas[21] = {
@@ -565,13 +494,11 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
ret = __sys_shutdown(a0, a1);
break;
case SYS_SETSOCKOPT:
ret = __compat_sys_setsockopt(a0, a1, a[2],
compat_ptr(a[3]), a[4]);
ret = __sys_setsockopt(a0, a1, a[2], 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 = __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]);