Being able to utilize this makes code a lot simpler and cleaner. It's
easier in many cases for drivers to pass around their private data
structure, while occationally needing to dip into net_device, rather
than the other way around, which results in tons of calls to netdev_priv
in the top of every single function, which makes everything confusing
and less clear. Additionally, this enables a "correct" way of doing such
a thing, instead of having drivers attempt to reinvent the wheel and
screw it up.
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
---
include/linux/netdevice.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 779b23595596..83d58504e5c4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2030,26 +2030,37 @@ void dev_net_set(struct net_device *dev, struct net
*net)
}
/**
* netdev_priv - access network device private data
* @dev: network device
*
* Get network device private data
*/
static inline void *netdev_priv(const struct net_device *dev)
{
return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
}
+/**
+ * netdev_pub - access network device from private pointer
+ * @priv: private data pointer of network device
+ *
+ * Get network device from a network device private data pointer
+ */
+static inline struct net_device *netdev_pub(void *priv)
+{
+ return (struct net_device *)((char *)priv - ALIGN(sizeof(struct
net_device), NETDEV_ALIGN));
+}
+
/* Set the sysfs physical device reference for the network logical device
* if set prior to registration will cause a symlink during initialization.
*/
#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
/* Set the sysfs device type for the network logical device to allow
* fine-grained identification of different network device types. For
* example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
*/
#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
/* Default NAPI poll() weight
* Device drivers are strongly advised to not use bigger value
--
2.13.2
