* Set a socket option. Because we don't know the option lengths we have
* to pass the user mode parameter for the protocols to sort out.
*/
-
-static int __sys_setsockopt(int fd, int level, int optname,
- char __user *optval, int optlen)
+int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval,
+ int optlen)
{
- mm_segment_t oldfs = get_fs();
+ sockptr_t optval;
char *kernel_optval = NULL;
int err, fput_needed;
struct socket *sock;
if (optlen < 0)
return -EINVAL;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
- if (sock != NULL) {
- err = security_socket_setsockopt(sock, level, optname);
- if (err)
- goto out_put;
+ err = init_user_sockptr(&optval, user_optval, optlen);
+ if (err)
+ return err;
- err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level,
- &optname, optval, &optlen,
- &kernel_optval);
+ sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ if (!sock)
+ return err;
- if (err < 0) {
- goto out_put;
- } else if (err > 0) {
- err = 0;
- goto out_put;
- }
+ err = security_socket_setsockopt(sock, level, optname);
+ if (err)
+ goto out_put;
- if (kernel_optval) {
- set_fs(KERNEL_DS);
- optval = (char __user __force *)kernel_optval;
- }
+ if (!in_compat_syscall())
+ err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname,
+ user_optval, &optlen,
+ &kernel_optval);
+ if (err < 0)
+ goto out_put;
+ if (err > 0) {
+ err = 0;
+ goto out_put;
+ }
- if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock))
- err =
- sock_setsockopt(sock, level, optname, optval,
+ if (kernel_optval)
+ optval = KERNEL_SOCKPTR(kernel_optval);
+ if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock))
+ err = sock_setsockopt(sock, level, optname, optval, optlen);
+ else if (unlikely(!sock->ops->setsockopt))
+ err = -EOPNOTSUPP;
+ else
+ err = sock->ops->setsockopt(sock, level, optname, optval,
optlen);
- else
- err =
- sock->ops->setsockopt(sock, level, optname, optval,
- optlen);
-
- if (kernel_optval) {
- set_fs(oldfs);
- kfree(kernel_optval);
- }
+ kfree(kernel_optval);
out_put:
- fput_light(sock->file, fput_needed);
- }
+ fput_light(sock->file, fput_needed);
return err;
}
* Get a socket option. Because we don't know the option lengths we have
* to pass a user mode parameter for the protocols to sort out.
*/
-
-static int __sys_getsockopt(int fd, int level, int optname,
- char __user *optval, int __user *optlen)
+int __sys_getsockopt(int fd, int level, int optname, char __user *optval,
+ int __user *optlen)
{
int err, fput_needed;
struct socket *sock;
int max_optlen;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
- if (sock != NULL) {
- err = security_socket_getsockopt(sock, level, optname);
- if (err)
- goto out_put;
+ if (!sock)
+ return err;
+
+ err = security_socket_getsockopt(sock, level, optname);
+ if (err)
+ goto out_put;
+ if (!in_compat_syscall())
max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
- if (level == SOL_SOCKET)
- err =
- sock_getsockopt(sock, level, optname, optval,
+ if (level == SOL_SOCKET)
+ err = sock_getsockopt(sock, level, optname, optval, optlen);
+ else if (unlikely(!sock->ops->getsockopt))
+ err = -EOPNOTSUPP;
+ else
+ err = sock->ops->getsockopt(sock, level, optname, optval,
optlen);
- else
- err =
- sock->ops->getsockopt(sock, level, optname, optval,
- optlen);
+ if (!in_compat_syscall())
err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname,
- optval, optlen,
- max_optlen, err);
+ optval, optlen, max_optlen,
+ err);
out_put:
- fput_light(sock->file, fput_needed);
- }
+ fput_light(sock->file, fput_needed);
return err;
}