[PATCH net-next v3 03/31] staging: wlan-ng: use siocdevprivate

Arnd Bergmann
2021-07-27T13:46:19Z

wlan-ng has two private ioctls that correctly work in compat
mode. Move these over to the new ndo_siocdevprivate mechanism.

The p80211netdev_ethtool() function is commented out and
has no use here, so this can be removed

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/staging/wlan-ng/p80211netdev.c | 76 ++++----------------------
1 file changed, 11 insertions(+), 65 deletions(-)

diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c
index 6f470e7ba647..1c62130a5eee 100644
--- a/drivers/staging/wlan-ng/p80211netdev.c
+++ b/drivers/staging/wlan-ng/p80211netdev.c
@@ -98,8 +98,8 @@ static int p80211knetdev_stop(struct net_device *netdev);
static netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb,
struct net_device *netdev);
static void p80211knetdev_set_multicast_list(struct net_device *dev);
-static int p80211knetdev_do_ioctl(struct net_device *dev, struct ifreq *ifr,
- int cmd);
+static int p80211knetdev_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd);
static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr);
static void p80211knetdev_tx_timeout(struct net_device *netdev, unsigned int txqueue);
static int p80211_rx_typedrop(struct wlandevice *wlandev, u16 fc);
@@ -461,56 +461,8 @@ static void p80211knetdev_set_multicast_list(struct net_device *dev)
wlandev->set_multicast_list(wlandev, dev);
}

-#ifdef SIOCETHTOOL
-
-static int p80211netdev_ethtool(struct wlandevice *wlandev,
- void __user *useraddr)
-{
- u32 ethcmd;
- struct ethtool_drvinfo info;
- struct ethtool_value edata;
-
- memset(&info, 0, sizeof(info));
- memset(&edata, 0, sizeof(edata));
-
- if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
- return -EFAULT;
-
- switch (ethcmd) {
- case ETHTOOL_GDRVINFO:
- info.cmd = ethcmd;
- snprintf(info.driver, sizeof(info.driver), "p80211_%s",
- wlandev->nsdname);
- snprintf(info.version, sizeof(info.version), "%s",
- WLAN_RELEASE);
-
- if (copy_to_user(useraddr, &info, sizeof(info)))
- return -EFAULT;
- return 0;
-#ifdef ETHTOOL_GLINK
- case ETHTOOL_GLINK:
- edata.cmd = ethcmd;
-
- if (wlandev->linkstatus &&
- (wlandev->macmode != WLAN_MACMODE_NONE)) {
- edata.data = 1;
- } else {
- edata.data = 0;
- }
-
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
-#endif
- }
-
- return -EOPNOTSUPP;
-}
-
-#endif
-
/*----------------------------------------------------------------
- * p80211knetdev_do_ioctl
+ * p80211knetdev_siocdevprivate
*
* Handle an ioctl call on one of our devices. Everything Linux
* ioctl specific is done here. Then we pass the contents of the
@@ -537,8 +489,9 @@ static int p80211netdev_ethtool(struct wlandevice *wlandev,
* locks.
*----------------------------------------------------------------
*/
-static int p80211knetdev_do_ioctl(struct net_device *dev,
- struct ifreq *ifr, int cmd)
+static int p80211knetdev_siocdevprivate(struct net_device *dev,
+ struct ifreq *ifr,
+ void __user *data, int cmd)
{
int result = 0;
struct p80211ioctl_req *req = (struct p80211ioctl_req *)ifr;
@@ -547,13 +500,8 @@ static int p80211knetdev_do_ioctl(struct net_device *dev,

netdev_dbg(dev, "rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);

-#ifdef SIOCETHTOOL
- if (cmd == SIOCETHTOOL) {
- result =
- p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data);
- goto bail;
- }
-#endif
+ if (in_compat_syscall())
+ return -EOPNOTSUPP;

/* Test the magic, assume ifr is good if it's there */
if (req->magic != P80211_IOCTL_MAGIC) {
@@ -569,7 +517,7 @@ static int p80211knetdev_do_ioctl(struct net_device *dev,
goto bail;
}

- msgbuf = memdup_user(req->data, req->len);
+ msgbuf = memdup_user(data, req->len);
if (IS_ERR(msgbuf)) {
result = PTR_ERR(msgbuf);
goto bail;
@@ -578,10 +526,8 @@ static int p80211knetdev_do_ioctl(struct net_device *dev,
result = p80211req_dorequest(wlandev, msgbuf);

if (result == 0) {
- if (copy_to_user
- (req->data, msgbuf, req->len)) {
+ if (copy_to_user(data, msgbuf, req->len))
result = -EFAULT;
- }
}
kfree(msgbuf);

@@ -682,7 +628,7 @@ static const struct net_device_ops p80211_netdev_ops = {
.ndo_stop = p80211knetdev_stop,
.ndo_start_xmit = p80211knetdev_hard_start_xmit,
.ndo_set_rx_mode = p80211knetdev_set_multicast_list,
- .ndo_do_ioctl = p80211knetdev_do_ioctl,
+ .ndo_siocdevprivate = p80211knetdev_siocdevprivate,
.ndo_set_mac_address = p80211knetdev_set_mac_address,
.ndo_tx_timeout = p80211knetdev_tx_timeout,
.ndo_validate_addr = eth_validate_addr,
--
2.29.2