From: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Date: Wed, 15 Sep 2010 12:30:12 +0000 (+0000)
Subject: Phonet: hook resource routing to userspace via ioctl()'s
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7417fa83c1a8b75a03bd9b9b358999f38e771eab;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Phonet: hook resource routing to userspace via ioctl()'s

I wish we could use something cleaner, such as bind(). But that would
not work since resource subscription is orthogonal/in addition to the
normal object ID allocated via bind(). This is similar to multicasting
which also uses ioctl()'s.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/phonet.h b/include/linux/phonet.h
index 76edadf046d3..85e14a83283b 100644
--- a/include/linux/phonet.h
+++ b/include/linux/phonet.h
@@ -47,6 +47,8 @@
 
 /* ioctls */
 #define SIOCPNGETOBJECT		(SIOCPROTOPRIVATE + 0)
+#define SIOCPNADDRESOURCE	(SIOCPROTOPRIVATE + 14)
+#define SIOCPNDELRESOURCE	(SIOCPROTOPRIVATE + 15)
 
 /* Phonet protocol header */
 struct phonethdr {
diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index 1bd38db4fe1e..2f032381bd45 100644
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -52,6 +52,19 @@ static int pn_ioctl(struct sock *sk, int cmd, unsigned long arg)
 		answ = skb ? skb->len : 0;
 		release_sock(sk);
 		return put_user(answ, (int __user *)arg);
+
+	case SIOCPNADDRESOURCE:
+	case SIOCPNDELRESOURCE: {
+			u32 res;
+			if (get_user(res, (u32 __user *)arg))
+				return -EFAULT;
+			if (res >= 256)
+				return -EINVAL;
+			if (cmd == SIOCPNADDRESOURCE)
+				return pn_sock_bind_res(sk, res);
+			else
+				return pn_sock_unbind_res(sk, res);
+		}
 	}
 
 	return -ENOIOCTLCMD;
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 4c29a23e9007..d4f41afc0583 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -158,6 +158,7 @@ void pn_sock_unhash(struct sock *sk)
 	spin_lock_bh(&pnsocks.lock);
 	sk_del_node_init(sk);
 	spin_unlock_bh(&pnsocks.lock);
+	pn_sock_unbind_all_res(sk);
 }
 EXPORT_SYMBOL(pn_sock_unhash);