xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: add sock_bindtoindex

Browse Source 
Add a helper to directly set the SO_BINDTOIFINDEX sockopt from kernel
space without going through a fake uaccess.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-28 07:12:13 +02:00
committed by David S. Miller
parent 76ee0785f4
commit 7594888c78
4 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
net/core/sock.c
View File

@@ -566,7 +566,7 @@ struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie)
}
EXPORT_SYMBOL(sk_dst_check);
static int sock_setbindtodevice_locked(struct sock *sk, int ifindex)
static int sock_bindtoindex_locked(struct sock *sk, int ifindex)
{
int ret = -ENOPROTOOPT;
#ifdef CONFIG_NETDEVICES
@@ -594,6 +594,18 @@ out:
return ret;
}
int sock_bindtoindex(struct sock *sk, int ifindex)
{
int ret;
lock_sock(sk);
ret = sock_bindtoindex_locked(sk, ifindex);
release_sock(sk);
return ret;
}
EXPORT_SYMBOL(sock_bindtoindex);
static int sock_setbindtodevice(struct sock *sk, char __user *optval,
int optlen)
{
@@ -634,10 +646,7 @@ static int sock_setbindtodevice(struct sock *sk, char __user *optval,
goto out;
}
lock_sock(sk);
ret = sock_setbindtodevice_locked(sk, index);
release_sock(sk);
return sock_bindtoindex(sk, index);
out:
#endif
@@ -1216,7 +1225,7 @@ set_rcvbuf:
break;
case SO_BINDTOIFINDEX:
ret = sock_setbindtodevice_locked(sk, val);
ret = sock_bindtoindex_locked(sk, val);
break;
default: