linux-kernel - [RFC net-next 17/28] qeth: use ndo

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Date:   Fri,  6 Nov 2020 23:17:32 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     netdev@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, bridge@...ts.linux-foundation.org,
        linux-hams@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Johannes Berg <johannes@...solutions.net>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: [RFC net-next 17/28] qeth: use ndo_siocdevprivate

From: Arnd Bergmann <arnd@...db.de>

qeth has both standard MII ioctls and custom SIOCDEVPRIVATE ones,
all of which work correctly with compat user space.

Move the private ones over to the new ndo_siocdevprivate callback.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/s390/net/qeth_core.h      |  2 ++
 drivers/s390/net/qeth_core_main.c | 35 ++++++++++++++++++++++---------
 drivers/s390/net/qeth_l3_main.c   |  6 +++---
 3 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index f73b4756ed5e..67da90dea919 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -1118,6 +1118,8 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 			unsigned int offset, unsigned int hd_len,
 			int elements_needed);
 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq,
+			void __user *data, int cmd);
 void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 93c9b30ab17a..7d785ddffcc0 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -6474,21 +6474,42 @@ struct qeth_card *qeth_get_card_by_busid(char *bus_id)
 }
 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
 
-int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
 {
 	struct qeth_card *card = dev->ml_priv;
-	struct mii_ioctl_data *mii_data;
 	int rc = 0;
 
 	switch (cmd) {
 	case SIOC_QETH_ADP_SET_SNMP_CONTROL:
-		rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
+		rc = qeth_snmp_command(card, data);
 		break;
 	case SIOC_QETH_GET_CARD_TYPE:
 		if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
 		    !IS_VM_NIC(card))
 			return 1;
 		return 0;
+	case SIOC_QETH_QUERY_OAT:
+		rc = qeth_query_oat_command(card, data);
+		break;
+	default:
+		if (card->discipline->do_ioctl)
+			rc = card->discipline->do_ioctl(dev, data, cmd);
+		else
+			rc = -EOPNOTSUPP;
+	}
+	if (rc)
+		QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
+
+int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct qeth_card *card = dev->ml_priv;
+	struct mii_ioctl_data *mii_data;
+	int rc = 0;
+
+	switch (cmd) {
 	case SIOCGMIIPHY:
 		mii_data = if_mii(rq);
 		mii_data->phy_id = 0;
@@ -6501,14 +6522,8 @@ int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 			mii_data->val_out = qeth_mdio_read(dev,
 				mii_data->phy_id, mii_data->reg_num);
 		break;
-	case SIOC_QETH_QUERY_OAT:
-		rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
-		break;
 	default:
-		if (card->discipline->do_ioctl)
-			rc = card->discipline->do_ioctl(dev, rq, cmd);
-		else
-			rc = -EOPNOTSUPP;
+		return -EOPNOTSUPP;
 	}
 	if (rc)
 		QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index b1c1d2510d55..546bebd264f2 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1532,7 +1532,7 @@ static int qeth_l3_arp_flush_cache(struct qeth_card *card)
 	return rc;
 }
 
-static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
 {
 	struct qeth_card *card = dev->ml_priv;
 	struct qeth_arp_cache_entry arp_entry;
@@ -1552,13 +1552,13 @@ static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 			rc = -EPERM;
 			break;
 		}
-		rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
+		rc = qeth_l3_arp_query(card, data);
 		break;
 	case SIOC_QETH_ARP_ADD_ENTRY:
 	case SIOC_QETH_ARP_REMOVE_ENTRY:
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
-		if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
+		if (copy_from_user(&arp_entry, data, sizeof(arp_entry)))
 			return -EFAULT;
 
 		arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
-- 
2.27.0