f25f4e4480
Add the multiqueue hardware device support API to the core network stack. Allow drivers to allocate multiple queues and manage them at the netdev level if they choose to do so. Added a new field to sk_buff, namely queue_mapping, for drivers to know which tx_ring to select based on OS classification of the flow. Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. NET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the Ethernet handlers.
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*
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* Version: @(#)eth.h 1.0.4 05/13/93
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*
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* Authors: Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* Relocated to include/linux where it belongs by Alan Cox
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* <gw4pts@gw4pts.ampr.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* WARNING: This move may well be temporary. This file will get merged with others RSN.
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*
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*/
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#ifndef _LINUX_ETHERDEVICE_H
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#define _LINUX_ETHERDEVICE_H
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/random.h>
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#ifdef __KERNEL__
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extern int eth_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type, void *daddr,
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void *saddr, unsigned len);
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extern int eth_rebuild_header(struct sk_buff *skb);
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extern __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
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extern void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
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unsigned char * haddr);
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extern int eth_header_cache(struct neighbour *neigh,
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struct hh_cache *hh);
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extern struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count);
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#define alloc_etherdev(sizeof_priv) alloc_etherdev_mq(sizeof_priv, 1)
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/**
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* is_zero_ether_addr - Determine if give Ethernet address is all zeros.
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Return true if the address is all zeroes.
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*/
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static inline int is_zero_ether_addr(const u8 *addr)
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{
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return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
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}
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/**
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* is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Return true if the address is a multicast address.
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* By definition the broadcast address is also a multicast address.
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*/
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static inline int is_multicast_ether_addr(const u8 *addr)
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{
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return (0x01 & addr[0]);
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}
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/**
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* is_local_ether_addr - Determine if the Ethernet address is locally-assigned
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* one (IEEE 802).
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Return true if the address is a local address.
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*/
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static inline int is_local_ether_addr(const u8 *addr)
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{
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return (0x02 & addr[0]);
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}
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/**
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* is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Return true if the address is the broadcast address.
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*/
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static inline int is_broadcast_ether_addr(const u8 *addr)
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{
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return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
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}
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/**
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* is_valid_ether_addr - Determine if the given Ethernet address is valid
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
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* a multicast address, and is not FF:FF:FF:FF:FF:FF.
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*
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* Return true if the address is valid.
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*/
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static inline int is_valid_ether_addr(const u8 *addr)
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{
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/* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
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* explicitly check for it here. */
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return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
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}
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/**
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* random_ether_addr - Generate software assigned random Ethernet address
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* @addr: Pointer to a six-byte array containing the Ethernet address
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*
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* Generate a random Ethernet address (MAC) that is not multicast
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* and has the local assigned bit set.
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*/
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static inline void random_ether_addr(u8 *addr)
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{
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get_random_bytes (addr, ETH_ALEN);
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addr [0] &= 0xfe; /* clear multicast bit */
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addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
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}
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/**
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* compare_ether_addr - Compare two Ethernet addresses
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* @addr1: Pointer to a six-byte array containing the Ethernet address
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* @addr2: Pointer other six-byte array containing the Ethernet address
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*
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* Compare two ethernet addresses, returns 0 if equal
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*/
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static inline unsigned compare_ether_addr(const u8 *addr1, const u8 *addr2)
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{
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const u16 *a = (const u16 *) addr1;
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const u16 *b = (const u16 *) addr2;
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BUILD_BUG_ON(ETH_ALEN != 6);
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return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
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}
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#endif /* __KERNEL__ */
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#endif /* _LINUX_ETHERDEVICE_H */
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