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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
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25
net/socket.c
View file

@ -2094,9 +2094,8 @@ static bool sock_use_custom_sol_socket(const struct socket *sock)
* 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 *optval,
int optlen)
{
mm_segment_t oldfs = get_fs();
char *kernel_optval = NULL;
@ -2114,8 +2113,10 @@ static int __sys_setsockopt(int fd, int level, int optname,
if (err)
goto out_put;
err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname,
optval, &optlen, &kernel_optval);
if (!in_compat_syscall())
err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname,
optval, &optlen,
&kernel_optval);
if (err < 0)
goto out_put;
if (err > 0) {
@ -2154,9 +2155,8 @@ SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
* 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;
@ -2170,7 +2170,8 @@ static int __sys_getsockopt(int fd, int level, int optname,
if (err)
goto out_put;
max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
if (!in_compat_syscall())
max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
if (level == SOL_SOCKET)
err = sock_getsockopt(sock, level, optname, optval, optlen);
@ -2178,8 +2179,10 @@ static int __sys_getsockopt(int fd, int level, int optname,
err = sock->ops->getsockopt(sock, level, optname, optval,
optlen);
err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, optval,
optlen, max_optlen, err);
if (!in_compat_syscall())
err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname,
optval, optlen, max_optlen,
err);
out_put:
fput_light(sock->file, fput_needed);
return err;