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Commit e267cb96 authored by David S. Miller's avatar David S. Miller
Browse files

vlan: Implement vlan_dev_get_egress_qos_mask as an inline. 



This is to avoid very silly Kconfig dependencies for modules
using this routine.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 170e8543

include/linux/if_vlan.h

+96 −2
Original line number Diff line number Diff line
@@ -88,8 +88,102 @@ extern struct net_device *__vlan_find_dev_deep(struct net_device *real_dev, 
					       __be16 vlan_proto, u16 vlan_id);

extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);

extern u16 vlan_dev_vlan_id(const struct net_device *dev);

extern u16 vlan_dev_get_egress_qos_mask(struct net_device *dev,

					u32 skprio);



/**

 *	struct vlan_priority_tci_mapping - vlan egress priority mappings

 *	@priority: skb priority

 *	@vlan_qos: vlan priority: (skb->priority << 13) & 0xE000

 *	@next: pointer to next struct

 */

struct vlan_priority_tci_mapping {

	u32					priority;

	u16					vlan_qos;

	struct vlan_priority_tci_mapping	*next;

};



/**

 *	struct vlan_pcpu_stats - VLAN percpu rx/tx stats

 *	@rx_packets: number of received packets

 *	@rx_bytes: number of received bytes

 *	@rx_multicast: number of received multicast packets

 *	@tx_packets: number of transmitted packets

 *	@tx_bytes: number of transmitted bytes

 *	@syncp: synchronization point for 64bit counters

 *	@rx_errors: number of rx errors

 *	@tx_dropped: number of tx drops

 */

struct vlan_pcpu_stats {

	u64			rx_packets;

	u64			rx_bytes;

	u64			rx_multicast;

	u64			tx_packets;

	u64			tx_bytes;

	struct u64_stats_sync	syncp;

	u32			rx_errors;

	u32			tx_dropped;

};



struct proc_dir_entry;

struct netpoll;



/**

 *	struct vlan_dev_priv - VLAN private device data

 *	@nr_ingress_mappings: number of ingress priority mappings

 *	@ingress_priority_map: ingress priority mappings

 *	@nr_egress_mappings: number of egress priority mappings

 *	@egress_priority_map: hash of egress priority mappings

 *	@vlan_proto: VLAN encapsulation protocol

 *	@vlan_id: VLAN identifier

 *	@flags: device flags

 *	@real_dev: underlying netdevice

 *	@real_dev_addr: address of underlying netdevice

 *	@dent: proc dir entry

 *	@vlan_pcpu_stats: ptr to percpu rx stats

 */

struct vlan_dev_priv {

	unsigned int				nr_ingress_mappings;

	u32					ingress_priority_map[8];

	unsigned int				nr_egress_mappings;

	struct vlan_priority_tci_mapping	*egress_priority_map[16];



	__be16					vlan_proto;

	u16					vlan_id;

	u16					flags;



	struct net_device			*real_dev;

	unsigned char				real_dev_addr[ETH_ALEN];



	struct proc_dir_entry			*dent;

	struct vlan_pcpu_stats __percpu		*vlan_pcpu_stats;

#ifdef CONFIG_NET_POLL_CONTROLLER

	struct netpoll				*netpoll;

#endif

};



static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)

{

	return netdev_priv(dev);

}



static inline u16

vlan_dev_get_egress_qos_mask(struct net_device *dev, u32 skprio)

{

	struct vlan_priority_tci_mapping *mp;



	smp_rmb(); /* coupled with smp_wmb() in vlan_dev_set_egress_priority() */



	mp = vlan_dev_priv(dev)->egress_priority_map[(skprio & 0xF)];

	while (mp) {

		if (mp->priority == skprio) {

			return mp->vlan_qos; /* This should already be shifted

					      * to mask correctly with the

					      * VLAN's TCI */

		}

		mp = mp->next;

	}

	return 0;

}



extern bool vlan_do_receive(struct sk_buff **skb);

extern struct sk_buff *vlan_untag(struct sk_buff *skb);

net/8021q/vlan.h

+0 −77
Original line number Diff line number Diff line
@@ -5,83 +5,6 @@ 
#include <linux/u64_stats_sync.h>

#include <linux/list.h>





/**

 *	struct vlan_priority_tci_mapping - vlan egress priority mappings

 *	@priority: skb priority

 *	@vlan_qos: vlan priority: (skb->priority << 13) & 0xE000

 *	@next: pointer to next struct

 */

struct vlan_priority_tci_mapping {

	u32					priority;

	u16					vlan_qos;

	struct vlan_priority_tci_mapping	*next;

};





/**

 *	struct vlan_pcpu_stats - VLAN percpu rx/tx stats

 *	@rx_packets: number of received packets

 *	@rx_bytes: number of received bytes

 *	@rx_multicast: number of received multicast packets

 *	@tx_packets: number of transmitted packets

 *	@tx_bytes: number of transmitted bytes

 *	@syncp: synchronization point for 64bit counters

 *	@rx_errors: number of rx errors

 *	@tx_dropped: number of tx drops

 */

struct vlan_pcpu_stats {

	u64			rx_packets;

	u64			rx_bytes;

	u64			rx_multicast;

	u64			tx_packets;

	u64			tx_bytes;

	struct u64_stats_sync	syncp;

	u32			rx_errors;

	u32			tx_dropped;

};



struct netpoll;



/**

 *	struct vlan_dev_priv - VLAN private device data

 *	@nr_ingress_mappings: number of ingress priority mappings

 *	@ingress_priority_map: ingress priority mappings

 *	@nr_egress_mappings: number of egress priority mappings

 *	@egress_priority_map: hash of egress priority mappings

 *	@vlan_proto: VLAN encapsulation protocol

 *	@vlan_id: VLAN identifier

 *	@flags: device flags

 *	@real_dev: underlying netdevice

 *	@real_dev_addr: address of underlying netdevice

 *	@dent: proc dir entry

 *	@vlan_pcpu_stats: ptr to percpu rx stats

 */

struct vlan_dev_priv {

	unsigned int				nr_ingress_mappings;

	u32					ingress_priority_map[8];

	unsigned int				nr_egress_mappings;

	struct vlan_priority_tci_mapping	*egress_priority_map[16];



	__be16					vlan_proto;

	u16					vlan_id;

	u16					flags;



	struct net_device			*real_dev;

	unsigned char				real_dev_addr[ETH_ALEN];



	struct proc_dir_entry			*dent;

	struct vlan_pcpu_stats __percpu		*vlan_pcpu_stats;

#ifdef CONFIG_NET_POLL_CONTROLLER

	struct netpoll				*netpoll;

#endif

};



static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)

{

	return netdev_priv(dev);

}



/* if this changes, algorithm will have to be reworked because this

 * depends on completely exhausting the VLAN identifier space.  Thus

 * it gives constant time look-up, but in many cases it wastes memory.

net/8021q/vlan_dev.c

+3 −28
Original line number Diff line number Diff line
@@ -68,31 +68,6 @@ static int vlan_dev_rebuild_header(struct sk_buff *skb) 
	return 0;

}



static inline u16

__vlan_dev_get_egress_qos_mask(struct net_device *dev, u32 skprio)

{

	struct vlan_priority_tci_mapping *mp;



	smp_rmb(); /* coupled with smp_wmb() in vlan_dev_set_egress_priority() */



	mp = vlan_dev_priv(dev)->egress_priority_map[(skprio & 0xF)];

	while (mp) {

		if (mp->priority == skprio) {

			return mp->vlan_qos; /* This should already be shifted

					      * to mask correctly with the

					      * VLAN's TCI */

		}

		mp = mp->next;

	}

	return 0;

}



u16 vlan_dev_get_egress_qos_mask(struct net_device *dev, u32 skprio)

{

	return __vlan_dev_get_egress_qos_mask(dev, skprio);

}

EXPORT_SYMBOL(vlan_dev_get_egress_qos_mask);



/*

 *	Create the VLAN header for an arbitrary protocol layer

 *
@@ -117,7 +92,7 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 
		vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);



		vlan_tci = vlan->vlan_id;

		vlan_tci |= __vlan_dev_get_egress_qos_mask(dev, skb->priority);

		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);

		vhdr->h_vlan_TCI = htons(vlan_tci);



		/*
@@ -174,7 +149,7 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 
	    vlan->flags & VLAN_FLAG_REORDER_HDR) {

		u16 vlan_tci;

		vlan_tci = vlan->vlan_id;

		vlan_tci |= __vlan_dev_get_egress_qos_mask(dev, skb->priority);

		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);

		skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);

	}
@@ -259,7 +234,7 @@ int vlan_dev_set_egress_priority(const struct net_device *dev, 
	np->vlan_qos = vlan_qos;

	/* Before inserting this element in hash table, make sure all its fields

	 * are committed to memory.

	 * coupled with smp_rmb() in __vlan_dev_get_egress_qos_mask()

	 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()

	 */

	smp_wmb();

	vlan->egress_priority_map[skb_prio & 0xF] = np;