2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
|
|
* operating system. INET is implemented using the BSD Socket
|
|
|
|
* interface as the means of communication with the user level.
|
|
|
|
*
|
|
|
|
* Ethernet-type device handling.
|
|
|
|
*
|
|
|
|
* Version: @(#)eth.c 1.0.7 05/25/93
|
|
|
|
*
|
2005-05-05 23:16:16 +00:00
|
|
|
* Authors: Ross Biro
|
2005-04-16 22:20:36 +00:00
|
|
|
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
|
|
|
* Mark Evans, <evansmp@uhura.aston.ac.uk>
|
|
|
|
* Florian La Roche, <rzsfl@rz.uni-sb.de>
|
|
|
|
* Alan Cox, <gw4pts@gw4pts.ampr.org>
|
2007-02-09 14:24:44 +00:00
|
|
|
*
|
2005-04-16 22:20:36 +00:00
|
|
|
* Fixes:
|
|
|
|
* Mr Linux : Arp problems
|
|
|
|
* Alan Cox : Generic queue tidyup (very tiny here)
|
|
|
|
* Alan Cox : eth_header ntohs should be htons
|
|
|
|
* Alan Cox : eth_rebuild_header missing an htons and
|
|
|
|
* minor other things.
|
2007-02-09 14:24:44 +00:00
|
|
|
* Tegge : Arp bug fixes.
|
2005-04-16 22:20:36 +00:00
|
|
|
* Florian : Removed many unnecessary functions, code cleanup
|
|
|
|
* and changes for new arp and skbuff.
|
|
|
|
* Alan Cox : Redid header building to reflect new format.
|
|
|
|
* Alan Cox : ARP only when compiled with CONFIG_INET
|
|
|
|
* Greg Page : 802.2 and SNAP stuff.
|
|
|
|
* Alan Cox : MAC layer pointers/new format.
|
|
|
|
* Paul Gortmaker : eth_copy_and_sum shouldn't csum padding.
|
|
|
|
* Alan Cox : Protect against forwarding explosions with
|
|
|
|
* older network drivers and IFF_ALLMULTI.
|
|
|
|
* Christer Weinigel : Better rebuild header message.
|
|
|
|
* Andrew Morton : 26Feb01: kill ether_setup() - use netdev_boot_setup().
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; either version
|
|
|
|
* 2 of the License, or (at your option) any later version.
|
|
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/socket.h>
|
|
|
|
#include <linux/in.h>
|
|
|
|
#include <linux/inet.h>
|
|
|
|
#include <linux/ip.h>
|
|
|
|
#include <linux/netdevice.h>
|
|
|
|
#include <linux/etherdevice.h>
|
|
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/init.h>
|
2006-01-06 00:35:42 +00:00
|
|
|
#include <linux/if_ether.h>
|
2015-11-05 16:34:57 +00:00
|
|
|
#include <linux/of_net.h>
|
|
|
|
#include <linux/pci.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <net/dst.h>
|
|
|
|
#include <net/arp.h>
|
|
|
|
#include <net/sock.h>
|
|
|
|
#include <net/ipv6.h>
|
|
|
|
#include <net/ip.h>
|
2008-10-07 13:45:02 +00:00
|
|
|
#include <net/dsa.h>
|
2015-05-12 12:56:09 +00:00
|
|
|
#include <net/flow_dissector.h>
|
2013-09-19 16:06:50 +00:00
|
|
|
#include <linux/uaccess.h>
|
2016-11-03 13:56:01 +00:00
|
|
|
#include <net/pkt_sched.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
__setup("ether=", netdev_boot_setup);
|
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_header - create the Ethernet header
|
|
|
|
* @skb: buffer to alter
|
|
|
|
* @dev: source device
|
|
|
|
* @type: Ethernet type field
|
|
|
|
* @daddr: destination address (NULL leave destination address)
|
|
|
|
* @saddr: source address (NULL use device source address)
|
|
|
|
* @len: packet length (<= skb->len)
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
2006-08-18 01:18:53 +00:00
|
|
|
*
|
2009-12-26 11:50:59 +00:00
|
|
|
* Set the protocol type. For a packet of type ETH_P_802_3/2 we put the length
|
|
|
|
* in here instead.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2007-10-09 08:40:57 +00:00
|
|
|
int eth_header(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
unsigned short type,
|
2012-04-15 05:58:06 +00:00
|
|
|
const void *daddr, const void *saddr, unsigned int len)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
networking: make skb_push & __skb_push return void pointers
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.
Make these functions return void * and remove all the casts across
the tree, adding a (u8 *) cast only where the unsigned char pointer
was used directly, all done with the following spatch:
@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)
@@
expression E, SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)
@@
expression SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- fn(SKB, LEN)[0]
+ *(u8 *)fn(SKB, LEN)
Note that the last part there converts from push(...)[0] to the
more idiomatic *(u8 *)push(...).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 12:29:23 +00:00
|
|
|
struct ethhdr *eth = skb_push(skb, ETH_HLEN);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-12-26 11:50:59 +00:00
|
|
|
if (type != ETH_P_802_3 && type != ETH_P_802_2)
|
2005-04-16 22:20:36 +00:00
|
|
|
eth->h_proto = htons(type);
|
|
|
|
else
|
|
|
|
eth->h_proto = htons(len);
|
|
|
|
|
|
|
|
/*
|
2006-08-18 01:20:18 +00:00
|
|
|
* Set the source hardware address.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2006-08-18 01:20:18 +00:00
|
|
|
|
|
|
|
if (!saddr)
|
2005-06-28 22:49:06 +00:00
|
|
|
saddr = dev->dev_addr;
|
2007-08-25 05:35:44 +00:00
|
|
|
memcpy(eth->h_source, saddr, ETH_ALEN);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:20:18 +00:00
|
|
|
if (daddr) {
|
2007-08-25 05:35:44 +00:00
|
|
|
memcpy(eth->h_dest, daddr, ETH_ALEN);
|
2006-02-24 00:18:01 +00:00
|
|
|
return ETH_HLEN;
|
|
|
|
}
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
2006-08-18 01:20:18 +00:00
|
|
|
* Anyway, the loopback-device should never use this function...
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
|
2006-08-18 01:20:18 +00:00
|
|
|
if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
|
2015-03-03 03:54:56 +00:00
|
|
|
eth_zero_addr(eth->h_dest);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ETH_HLEN;
|
|
|
|
}
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ETH_HLEN;
|
|
|
|
}
|
2007-10-09 08:40:57 +00:00
|
|
|
EXPORT_SYMBOL(eth_header);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2014-09-05 23:20:26 +00:00
|
|
|
/**
|
2015-08-06 12:27:54 +00:00
|
|
|
* eth_get_headlen - determine the length of header for an ethernet frame
|
2014-09-05 23:20:26 +00:00
|
|
|
* @data: pointer to start of frame
|
|
|
|
* @len: total length of frame
|
|
|
|
*
|
|
|
|
* Make a best effort attempt to pull the length for all of the headers for
|
|
|
|
* a given frame in a linear buffer.
|
|
|
|
*/
|
|
|
|
u32 eth_get_headlen(void *data, unsigned int len)
|
|
|
|
{
|
2016-02-24 17:30:04 +00:00
|
|
|
const unsigned int flags = FLOW_DISSECTOR_F_PARSE_1ST_FRAG;
|
2014-09-05 23:20:26 +00:00
|
|
|
const struct ethhdr *eth = (const struct ethhdr *)data;
|
2018-05-04 09:32:59 +00:00
|
|
|
struct flow_keys_basic keys;
|
2014-09-05 23:20:26 +00:00
|
|
|
|
|
|
|
/* this should never happen, but better safe than sorry */
|
2015-09-28 10:47:14 +00:00
|
|
|
if (unlikely(len < sizeof(*eth)))
|
2014-09-05 23:20:26 +00:00
|
|
|
return len;
|
|
|
|
|
|
|
|
/* parse any remaining L2/L3 headers, check for L4 */
|
2018-05-04 09:32:59 +00:00
|
|
|
if (!skb_flow_dissect_flow_keys_basic(NULL, &keys, data, eth->h_proto,
|
|
|
|
sizeof(*eth), len, flags))
|
2015-06-04 16:16:40 +00:00
|
|
|
return max_t(u32, keys.control.thoff, sizeof(*eth));
|
2014-09-05 23:20:26 +00:00
|
|
|
|
|
|
|
/* parse for any L4 headers */
|
|
|
|
return min_t(u32, __skb_get_poff(NULL, data, &keys, len), len);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_get_headlen);
|
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_type_trans - determine the packet's protocol ID.
|
|
|
|
* @skb: received socket data
|
|
|
|
* @dev: receiving network device
|
|
|
|
*
|
|
|
|
* The rule here is that we
|
|
|
|
* assume 802.3 if the type field is short enough to be a length.
|
|
|
|
* This is normal practice and works for any 'now in use' protocol.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2005-07-12 19:08:43 +00:00
|
|
|
__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2014-01-16 23:03:31 +00:00
|
|
|
unsigned short _service_access_point;
|
|
|
|
const unsigned short *sap;
|
|
|
|
const struct ethhdr *eth;
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2007-04-26 00:40:23 +00:00
|
|
|
skb->dev = dev;
|
2007-03-19 22:30:44 +00:00
|
|
|
skb_reset_mac_header(skb);
|
2015-04-30 21:53:59 +00:00
|
|
|
|
|
|
|
eth = (struct ethhdr *)skb->data;
|
2010-05-02 09:21:44 +00:00
|
|
|
skb_pull_inline(skb, ETH_HLEN);
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2018-11-13 01:34:31 +00:00
|
|
|
if (unlikely(!ether_addr_equal_64bits(eth->h_dest,
|
|
|
|
dev->dev_addr))) {
|
|
|
|
if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
|
|
|
|
if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
|
|
|
|
skb->pkt_type = PACKET_BROADCAST;
|
|
|
|
else
|
|
|
|
skb->pkt_type = PACKET_MULTICAST;
|
|
|
|
} else {
|
|
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2008-10-07 13:45:02 +00:00
|
|
|
/*
|
|
|
|
* Some variants of DSA tagging don't have an ethertype field
|
|
|
|
* at all, so we check here whether one of those tagging
|
|
|
|
* variants has been configured on the receiving interface,
|
|
|
|
* and if so, set skb->protocol without looking at the packet.
|
|
|
|
*/
|
2014-08-28 00:04:46 +00:00
|
|
|
if (unlikely(netdev_uses_dsa(dev)))
|
|
|
|
return htons(ETH_P_XDSA);
|
2008-10-07 13:45:02 +00:00
|
|
|
|
2015-05-04 21:33:48 +00:00
|
|
|
if (likely(eth_proto_is_802_3(eth->h_proto)))
|
2005-04-16 22:20:36 +00:00
|
|
|
return eth->h_proto;
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
2006-08-18 01:20:18 +00:00
|
|
|
* This is a magic hack to spot IPX packets. Older Novell breaks
|
|
|
|
* the protocol design and runs IPX over 802.3 without an 802.2 LLC
|
|
|
|
* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
|
|
|
|
* won't work for fault tolerant netware but does for the rest.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2014-01-16 23:03:31 +00:00
|
|
|
sap = skb_header_pointer(skb, 0, sizeof(*sap), &_service_access_point);
|
|
|
|
if (sap && *sap == 0xFFFF)
|
2005-04-16 22:20:36 +00:00
|
|
|
return htons(ETH_P_802_3);
|
2006-08-18 01:20:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
2006-08-18 01:20:18 +00:00
|
|
|
* Real 802.2 LLC
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
return htons(ETH_P_802_2);
|
|
|
|
}
|
2006-08-18 01:20:18 +00:00
|
|
|
EXPORT_SYMBOL(eth_type_trans);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_header_parse - extract hardware address from packet
|
|
|
|
* @skb: packet to extract header from
|
|
|
|
* @haddr: destination buffer
|
|
|
|
*/
|
2007-10-09 08:40:57 +00:00
|
|
|
int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-09-27 05:13:38 +00:00
|
|
|
const struct ethhdr *eth = eth_hdr(skb);
|
2005-04-16 22:20:36 +00:00
|
|
|
memcpy(haddr, eth->h_source, ETH_ALEN);
|
|
|
|
return ETH_ALEN;
|
|
|
|
}
|
2007-10-09 08:40:57 +00:00
|
|
|
EXPORT_SYMBOL(eth_header_parse);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_header_cache - fill cache entry from neighbour
|
|
|
|
* @neigh: source neighbour
|
|
|
|
* @hh: destination cache entry
|
2011-07-25 23:17:01 +00:00
|
|
|
* @type: Ethernet type field
|
2012-07-10 10:55:09 +00:00
|
|
|
*
|
2006-08-18 01:18:53 +00:00
|
|
|
* Create an Ethernet header template from the neighbour.
|
|
|
|
*/
|
2011-07-13 06:28:12 +00:00
|
|
|
int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh, __be16 type)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct ethhdr *eth;
|
2007-10-09 08:40:57 +00:00
|
|
|
const struct net_device *dev = neigh->dev;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:20:18 +00:00
|
|
|
eth = (struct ethhdr *)
|
|
|
|
(((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth))));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-03-07 05:19:03 +00:00
|
|
|
if (type == htons(ETH_P_802_3))
|
2005-04-16 22:20:36 +00:00
|
|
|
return -1;
|
|
|
|
|
|
|
|
eth->h_proto = type;
|
2007-08-25 05:35:44 +00:00
|
|
|
memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
|
|
|
|
memcpy(eth->h_dest, neigh->ha, ETH_ALEN);
|
2005-04-16 22:20:36 +00:00
|
|
|
hh->hh_len = ETH_HLEN;
|
|
|
|
return 0;
|
|
|
|
}
|
2007-10-09 08:40:57 +00:00
|
|
|
EXPORT_SYMBOL(eth_header_cache);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_header_cache_update - update cache entry
|
|
|
|
* @hh: destination cache entry
|
|
|
|
* @dev: network device
|
|
|
|
* @haddr: new hardware address
|
|
|
|
*
|
2005-04-16 22:20:36 +00:00
|
|
|
* Called by Address Resolution module to notify changes in address.
|
|
|
|
*/
|
2007-10-09 08:40:57 +00:00
|
|
|
void eth_header_cache_update(struct hh_cache *hh,
|
|
|
|
const struct net_device *dev,
|
|
|
|
const unsigned char *haddr)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-08-18 01:20:18 +00:00
|
|
|
memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
|
2007-08-25 05:35:44 +00:00
|
|
|
haddr, ETH_ALEN);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2007-10-09 08:40:57 +00:00
|
|
|
EXPORT_SYMBOL(eth_header_cache_update);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2013-01-21 01:17:22 +00:00
|
|
|
/**
|
|
|
|
* eth_prepare_mac_addr_change - prepare for mac change
|
|
|
|
* @dev: network device
|
|
|
|
* @p: socket address
|
|
|
|
*/
|
|
|
|
int eth_prepare_mac_addr_change(struct net_device *dev, void *p)
|
|
|
|
{
|
|
|
|
struct sockaddr *addr = p;
|
|
|
|
|
|
|
|
if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev))
|
|
|
|
return -EBUSY;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
|
|
return -EADDRNOTAVAIL;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_prepare_mac_addr_change);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* eth_commit_mac_addr_change - commit mac change
|
|
|
|
* @dev: network device
|
|
|
|
* @p: socket address
|
|
|
|
*/
|
|
|
|
void eth_commit_mac_addr_change(struct net_device *dev, void *p)
|
|
|
|
{
|
|
|
|
struct sockaddr *addr = p;
|
|
|
|
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_commit_mac_addr_change);
|
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_mac_addr - set new Ethernet hardware address
|
|
|
|
* @dev: network device
|
|
|
|
* @p: socket address
|
2012-07-10 10:55:09 +00:00
|
|
|
*
|
2006-08-18 01:18:53 +00:00
|
|
|
* Change hardware address of device.
|
|
|
|
*
|
|
|
|
* This doesn't change hardware matching, so needs to be overridden
|
|
|
|
* for most real devices.
|
|
|
|
*/
|
2008-11-20 06:42:31 +00:00
|
|
|
int eth_mac_addr(struct net_device *dev, void *p)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2013-01-21 01:17:22 +00:00
|
|
|
int ret;
|
2007-07-12 02:41:18 +00:00
|
|
|
|
2013-01-21 01:17:22 +00:00
|
|
|
ret = eth_prepare_mac_addr_change(dev, p);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
eth_commit_mac_addr_change(dev, p);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2008-11-20 06:42:31 +00:00
|
|
|
EXPORT_SYMBOL(eth_mac_addr);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* eth_change_mtu - set new MTU size
|
|
|
|
* @dev: network device
|
|
|
|
* @new_mtu: new Maximum Transfer Unit
|
|
|
|
*
|
|
|
|
* Allow changing MTU size. Needs to be overridden for devices
|
|
|
|
* supporting jumbo frames.
|
|
|
|
*/
|
2008-11-20 06:42:31 +00:00
|
|
|
int eth_change_mtu(struct net_device *dev, int new_mtu)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
net: deprecate eth_change_mtu, remove usage
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.
Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.
v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-08 02:04:34 +00:00
|
|
|
netdev_warn(dev, "%s is deprecated\n", __func__);
|
2005-04-16 22:20:36 +00:00
|
|
|
dev->mtu = new_mtu;
|
|
|
|
return 0;
|
|
|
|
}
|
2008-11-20 06:42:31 +00:00
|
|
|
EXPORT_SYMBOL(eth_change_mtu);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-11-20 06:42:31 +00:00
|
|
|
int eth_validate_addr(struct net_device *dev)
|
2007-10-24 03:19:37 +00:00
|
|
|
{
|
|
|
|
if (!is_valid_ether_addr(dev->dev_addr))
|
2008-04-14 05:45:40 +00:00
|
|
|
return -EADDRNOTAVAIL;
|
2007-10-24 03:19:37 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2008-11-20 06:42:31 +00:00
|
|
|
EXPORT_SYMBOL(eth_validate_addr);
|
2007-10-24 03:19:37 +00:00
|
|
|
|
2007-10-09 08:40:57 +00:00
|
|
|
const struct header_ops eth_header_ops ____cacheline_aligned = {
|
|
|
|
.create = eth_header,
|
|
|
|
.parse = eth_header_parse,
|
|
|
|
.cache = eth_header_cache,
|
|
|
|
.cache_update = eth_header_cache_update,
|
|
|
|
};
|
|
|
|
|
2006-08-18 01:18:53 +00:00
|
|
|
/**
|
|
|
|
* ether_setup - setup Ethernet network device
|
|
|
|
* @dev: network device
|
2012-07-10 10:55:09 +00:00
|
|
|
*
|
2006-08-18 01:18:53 +00:00
|
|
|
* Fill in the fields of the device structure with Ethernet-generic values.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
void ether_setup(struct net_device *dev)
|
|
|
|
{
|
2007-10-09 08:40:57 +00:00
|
|
|
dev->header_ops = ð_header_ops;
|
2005-04-16 22:20:36 +00:00
|
|
|
dev->type = ARPHRD_ETHER;
|
|
|
|
dev->hard_header_len = ETH_HLEN;
|
2017-02-07 20:57:20 +00:00
|
|
|
dev->min_header_len = ETH_HLEN;
|
2006-01-06 00:35:42 +00:00
|
|
|
dev->mtu = ETH_DATA_LEN;
|
net: deprecate eth_change_mtu, remove usage
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.
Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.
v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-08 02:04:34 +00:00
|
|
|
dev->min_mtu = ETH_MIN_MTU;
|
|
|
|
dev->max_mtu = ETH_DATA_LEN;
|
2005-04-16 22:20:36 +00:00
|
|
|
dev->addr_len = ETH_ALEN;
|
2016-11-03 13:56:01 +00:00
|
|
|
dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;
|
2005-04-16 22:20:36 +00:00
|
|
|
dev->flags = IFF_BROADCAST|IFF_MULTICAST;
|
2011-09-14 03:05:02 +00:00
|
|
|
dev->priv_flags |= IFF_TX_SKB_SHARING;
|
2007-02-09 14:24:44 +00:00
|
|
|
|
2015-03-03 03:54:56 +00:00
|
|
|
eth_broadcast_addr(dev->broadcast);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ether_setup);
|
|
|
|
|
|
|
|
/**
|
2011-01-09 19:36:31 +00:00
|
|
|
* alloc_etherdev_mqs - Allocates and sets up an Ethernet device
|
2005-04-16 22:20:36 +00:00
|
|
|
* @sizeof_priv: Size of additional driver-private structure to be allocated
|
2006-08-18 01:18:53 +00:00
|
|
|
* for this Ethernet device
|
2011-01-09 19:36:31 +00:00
|
|
|
* @txqs: The number of TX queues this device has.
|
2011-01-12 14:50:51 +00:00
|
|
|
* @rxqs: The number of RX queues this device has.
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
2006-08-18 01:18:53 +00:00
|
|
|
* Fill in the fields of the device structure with Ethernet-generic
|
2005-04-16 22:20:36 +00:00
|
|
|
* values. Basically does everything except registering the device.
|
|
|
|
*
|
|
|
|
* Constructs a new net device, complete with a private data area of
|
2006-08-18 01:18:53 +00:00
|
|
|
* size (sizeof_priv). A 32-byte (not bit) alignment is enforced for
|
2005-04-16 22:20:36 +00:00
|
|
|
* this private data area.
|
|
|
|
*/
|
|
|
|
|
2011-01-09 19:36:31 +00:00
|
|
|
struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
|
|
|
|
unsigned int rxqs)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
net: set name_assign_type in alloc_netdev()
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert
all users to pass NET_NAME_UNKNOWN.
Coccinelle patch:
@@
expression sizeof_priv, name, setup, txqs, rxqs, count;
@@
(
-alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs)
+alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs)
|
-alloc_netdev_mq(sizeof_priv, name, setup, count)
+alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count)
|
-alloc_netdev(sizeof_priv, name, setup)
+alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup)
)
v9: move comments here from the wrong commit
Signed-off-by: Tom Gundersen <teg@jklm.no>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-14 14:37:24 +00:00
|
|
|
return alloc_netdev_mqs(sizeof_priv, "eth%d", NET_NAME_UNKNOWN,
|
|
|
|
ether_setup, txqs, rxqs);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2011-01-09 19:36:31 +00:00
|
|
|
EXPORT_SYMBOL(alloc_etherdev_mqs);
|
2007-10-04 00:59:30 +00:00
|
|
|
|
2017-01-28 14:15:42 +00:00
|
|
|
static void devm_free_netdev(struct device *dev, void *res)
|
|
|
|
{
|
|
|
|
free_netdev(*(struct net_device **)res);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct net_device *devm_alloc_etherdev_mqs(struct device *dev, int sizeof_priv,
|
|
|
|
unsigned int txqs, unsigned int rxqs)
|
|
|
|
{
|
|
|
|
struct net_device **dr;
|
|
|
|
struct net_device *netdev;
|
|
|
|
|
|
|
|
dr = devres_alloc(devm_free_netdev, sizeof(*dr), GFP_KERNEL);
|
|
|
|
if (!dr)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
netdev = alloc_etherdev_mqs(sizeof_priv, txqs, rxqs);
|
|
|
|
if (!netdev) {
|
|
|
|
devres_free(dr);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
*dr = netdev;
|
|
|
|
devres_add(dev, dr);
|
|
|
|
|
|
|
|
return netdev;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(devm_alloc_etherdev_mqs);
|
|
|
|
|
2007-12-25 05:28:09 +00:00
|
|
|
ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len)
|
|
|
|
{
|
2013-07-17 00:09:15 +00:00
|
|
|
return scnprintf(buf, PAGE_SIZE, "%*phC\n", len, addr);
|
2007-12-25 05:28:09 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(sysfs_format_mac);
|
2014-12-31 03:10:15 +00:00
|
|
|
|
2018-06-24 05:13:49 +00:00
|
|
|
struct sk_buff *eth_gro_receive(struct list_head *head, struct sk_buff *skb)
|
2014-12-31 03:10:15 +00:00
|
|
|
{
|
|
|
|
const struct packet_offload *ptype;
|
2018-06-24 05:13:49 +00:00
|
|
|
unsigned int hlen, off_eth;
|
|
|
|
struct sk_buff *pp = NULL;
|
|
|
|
struct ethhdr *eh, *eh2;
|
|
|
|
struct sk_buff *p;
|
2014-12-31 03:10:15 +00:00
|
|
|
__be16 type;
|
|
|
|
int flush = 1;
|
|
|
|
|
|
|
|
off_eth = skb_gro_offset(skb);
|
|
|
|
hlen = off_eth + sizeof(*eh);
|
|
|
|
eh = skb_gro_header_fast(skb, off_eth);
|
|
|
|
if (skb_gro_header_hard(skb, hlen)) {
|
|
|
|
eh = skb_gro_header_slow(skb, hlen, off_eth);
|
|
|
|
if (unlikely(!eh))
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
flush = 0;
|
|
|
|
|
2018-06-24 05:13:49 +00:00
|
|
|
list_for_each_entry(p, head, list) {
|
2014-12-31 03:10:15 +00:00
|
|
|
if (!NAPI_GRO_CB(p)->same_flow)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
eh2 = (struct ethhdr *)(p->data + off_eth);
|
|
|
|
if (compare_ether_header(eh, eh2)) {
|
|
|
|
NAPI_GRO_CB(p)->same_flow = 0;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
type = eh->h_proto;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
ptype = gro_find_receive_by_type(type);
|
|
|
|
if (ptype == NULL) {
|
|
|
|
flush = 1;
|
|
|
|
goto out_unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_gro_pull(skb, sizeof(*eh));
|
|
|
|
skb_gro_postpull_rcsum(skb, eh, sizeof(*eh));
|
2016-10-20 13:58:02 +00:00
|
|
|
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
|
2014-12-31 03:10:15 +00:00
|
|
|
|
|
|
|
out_unlock:
|
|
|
|
rcu_read_unlock();
|
|
|
|
out:
|
2017-02-15 08:39:39 +00:00
|
|
|
skb_gro_flush_final(skb, pp, flush);
|
2014-12-31 03:10:15 +00:00
|
|
|
|
|
|
|
return pp;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_gro_receive);
|
|
|
|
|
|
|
|
int eth_gro_complete(struct sk_buff *skb, int nhoff)
|
|
|
|
{
|
|
|
|
struct ethhdr *eh = (struct ethhdr *)(skb->data + nhoff);
|
|
|
|
__be16 type = eh->h_proto;
|
|
|
|
struct packet_offload *ptype;
|
|
|
|
int err = -ENOSYS;
|
|
|
|
|
|
|
|
if (skb->encapsulation)
|
|
|
|
skb_set_inner_mac_header(skb, nhoff);
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
ptype = gro_find_complete_by_type(type);
|
|
|
|
if (ptype != NULL)
|
|
|
|
err = ptype->callbacks.gro_complete(skb, nhoff +
|
|
|
|
sizeof(struct ethhdr));
|
|
|
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_gro_complete);
|
|
|
|
|
|
|
|
static struct packet_offload eth_packet_offload __read_mostly = {
|
|
|
|
.type = cpu_to_be16(ETH_P_TEB),
|
2015-06-01 21:56:09 +00:00
|
|
|
.priority = 10,
|
2014-12-31 03:10:15 +00:00
|
|
|
.callbacks = {
|
|
|
|
.gro_receive = eth_gro_receive,
|
|
|
|
.gro_complete = eth_gro_complete,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init eth_offload_init(void)
|
|
|
|
{
|
|
|
|
dev_add_offload(ð_packet_offload);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
fs_initcall(eth_offload_init);
|
2015-11-05 16:34:57 +00:00
|
|
|
|
|
|
|
unsigned char * __weak arch_get_platform_mac_address(void)
|
|
|
|
{
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr)
|
|
|
|
{
|
|
|
|
const unsigned char *addr;
|
|
|
|
struct device_node *dp;
|
|
|
|
|
|
|
|
if (dev_is_pci(dev))
|
|
|
|
dp = pci_device_to_OF_node(to_pci_dev(dev));
|
|
|
|
else
|
|
|
|
dp = dev->of_node;
|
|
|
|
|
|
|
|
addr = NULL;
|
|
|
|
if (dp)
|
|
|
|
addr = of_get_mac_address(dp);
|
|
|
|
if (!addr)
|
|
|
|
addr = arch_get_platform_mac_address();
|
|
|
|
|
|
|
|
if (!addr)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
ether_addr_copy(mac_addr, addr);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(eth_platform_get_mac_address);
|