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net/ipv4: switch ip_mroute_setsockopt to sockptr_t

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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-07-23 08:08:56 +02:00 committed by David S. Miller
parent b03afaa82e
commit 01ccb5b48f
3 changed files with 12 additions and 10 deletions
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5
include/linux/mroute.h
View File

@ -8,6 +8,7 @@
#include <net/fib_notifier.h>
#include <uapi/linux/mroute.h>
#include <linux/mroute_base.h>
#include <linux/sockptr.h>
#ifdef CONFIG_IP_MROUTE
static inline int ip_mroute_opt(int opt)
@ -15,7 +16,7 @@ static inline int ip_mroute_opt(int opt)
return opt >= MRT_BASE && opt <= MRT_MAX;
}
int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
int ip_mroute_setsockopt(struct sock *, int, sockptr_t, unsigned int);
int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
@ -23,7 +24,7 @@ int ip_mr_init(void);
bool ipmr_rule_default(const struct fib_rule *rule);
#else
static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
char __user *optval, unsigned int optlen)
sockptr_t optval, unsigned int optlen)
{
return -ENOPROTOOPT;
}

3
net/ipv4/ip_sockglue.c
View File

@ -925,7 +925,8 @@ static int do_ip_setsockopt(struct sock *sk, int level,
if (optname == IP_ROUTER_ALERT)
return ip_ra_control(sk, val ? 1 : 0, NULL);
if (ip_mroute_opt(optname))
return ip_mroute_setsockopt(sk, optname, optval, optlen);
return ip_mroute_setsockopt(sk, optname, USER_SOCKPTR(optval),
optlen);
err = 0;
if (needs_rtnl)

14
net/ipv4/ipmr.c
View File

@ -1341,7 +1341,7 @@ static void mrtsock_destruct(struct sock *sk)
* MOSPF/PIM router set up we can clean this up.
*/
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
int ip_mroute_setsockopt(struct sock *sk, int optname, sockptr_t optval,
unsigned int optlen)
{
struct net *net = sock_net(sk);
@ -1413,7 +1413,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (copy_from_user(&vif, optval, sizeof(vif))) {
if (copy_from_sockptr(&vif, optval, sizeof(vif))) {
ret = -EFAULT;
break;
}
@ -1441,7 +1441,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (copy_from_user(&mfc, optval, sizeof(mfc))) {
if (copy_from_sockptr(&val, optval, sizeof(val))) {
ret = -EFAULT;
break;
}
@ -1459,7 +1459,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (get_user(val, (int __user *)optval)) {
if (copy_from_sockptr(&val, optval, sizeof(val))) {
ret = -EFAULT;
break;
}
@ -1471,7 +1471,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (get_user(val, (int __user *)optval)) {
if (copy_from_sockptr(&val, optval, sizeof(val))) {
ret = -EFAULT;
break;
}
@ -1486,7 +1486,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (get_user(val, (int __user *)optval)) {
if (copy_from_sockptr(&val, optval, sizeof(val))) {
ret = -EFAULT;
break;
}
@ -1508,7 +1508,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval,
ret = -EINVAL;
break;
}
if (get_user(uval, (u32 __user *)optval)) {
if (copy_from_sockptr(&uval, optval, sizeof(uval))) {
ret = -EFAULT;
break;
}