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1828 lines
46 KiB
1828 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) 2007 Patrick McHardy <[email protected]> |
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* |
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* The code this is based on carried the following copyright notice: |
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* --- |
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* (C) Copyright 2001-2006 |
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* Alex Zeffertt, Cambridge Broadband Ltd, [email protected] |
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* Re-worked by Ben Greear <[email protected]> |
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* --- |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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#include <linux/rculist.h> |
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#include <linux/notifier.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/net_tstamp.h> |
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#include <linux/ethtool.h> |
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#include <linux/if_arp.h> |
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#include <linux/if_vlan.h> |
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#include <linux/if_link.h> |
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#include <linux/if_macvlan.h> |
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#include <linux/hash.h> |
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#include <linux/workqueue.h> |
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#include <net/rtnetlink.h> |
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#include <net/xfrm.h> |
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#include <linux/netpoll.h> |
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#include <linux/phy.h> |
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|
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#define MACVLAN_HASH_BITS 8 |
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#define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) |
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#define MACVLAN_DEFAULT_BC_QUEUE_LEN 1000 |
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|
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#define MACVLAN_F_PASSTHRU 1 |
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#define MACVLAN_F_ADDRCHANGE 2 |
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|
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struct macvlan_port { |
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struct net_device *dev; |
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struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; |
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struct list_head vlans; |
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struct sk_buff_head bc_queue; |
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struct work_struct bc_work; |
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u32 bc_queue_len_used; |
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u32 flags; |
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int count; |
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struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
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DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
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unsigned char perm_addr[ETH_ALEN]; |
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}; |
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|
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struct macvlan_source_entry { |
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struct hlist_node hlist; |
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struct macvlan_dev *vlan; |
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unsigned char addr[6+2] __aligned(sizeof(u16)); |
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struct rcu_head rcu; |
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}; |
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|
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struct macvlan_skb_cb { |
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const struct macvlan_dev *src; |
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}; |
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|
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#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) |
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|
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static void macvlan_port_destroy(struct net_device *dev); |
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static void update_port_bc_queue_len(struct macvlan_port *port); |
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|
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static inline bool macvlan_passthru(const struct macvlan_port *port) |
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{ |
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return port->flags & MACVLAN_F_PASSTHRU; |
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} |
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|
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static inline void macvlan_set_passthru(struct macvlan_port *port) |
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{ |
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port->flags |= MACVLAN_F_PASSTHRU; |
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} |
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|
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static inline bool macvlan_addr_change(const struct macvlan_port *port) |
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{ |
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return port->flags & MACVLAN_F_ADDRCHANGE; |
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} |
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|
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static inline void macvlan_set_addr_change(struct macvlan_port *port) |
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{ |
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port->flags |= MACVLAN_F_ADDRCHANGE; |
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} |
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|
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static inline void macvlan_clear_addr_change(struct macvlan_port *port) |
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{ |
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port->flags &= ~MACVLAN_F_ADDRCHANGE; |
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} |
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|
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/* Hash Ethernet address */ |
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static u32 macvlan_eth_hash(const unsigned char *addr) |
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{ |
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u64 value = get_unaligned((u64 *)addr); |
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|
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/* only want 6 bytes */ |
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#ifdef __BIG_ENDIAN |
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value >>= 16; |
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#else |
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value <<= 16; |
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#endif |
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return hash_64(value, MACVLAN_HASH_BITS); |
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} |
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|
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static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
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{ |
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return rcu_dereference(dev->rx_handler_data); |
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} |
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|
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static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) |
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{ |
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return rtnl_dereference(dev->rx_handler_data); |
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} |
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|
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static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
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const unsigned char *addr) |
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{ |
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struct macvlan_dev *vlan; |
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u32 idx = macvlan_eth_hash(addr); |
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|
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hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist, |
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lockdep_rtnl_is_held()) { |
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if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
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return vlan; |
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} |
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return NULL; |
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} |
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|
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static struct macvlan_source_entry *macvlan_hash_lookup_source( |
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const struct macvlan_dev *vlan, |
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const unsigned char *addr) |
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{ |
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struct macvlan_source_entry *entry; |
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u32 idx = macvlan_eth_hash(addr); |
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struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; |
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|
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hlist_for_each_entry_rcu(entry, h, hlist) { |
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if (ether_addr_equal_64bits(entry->addr, addr) && |
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entry->vlan == vlan) |
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return entry; |
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} |
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return NULL; |
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} |
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|
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static int macvlan_hash_add_source(struct macvlan_dev *vlan, |
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const unsigned char *addr) |
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{ |
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struct macvlan_port *port = vlan->port; |
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struct macvlan_source_entry *entry; |
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struct hlist_head *h; |
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|
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entry = macvlan_hash_lookup_source(vlan, addr); |
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if (entry) |
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return 0; |
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|
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entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
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if (!entry) |
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return -ENOMEM; |
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ether_addr_copy(entry->addr, addr); |
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entry->vlan = vlan; |
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h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; |
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hlist_add_head_rcu(&entry->hlist, h); |
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vlan->macaddr_count++; |
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|
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return 0; |
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} |
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|
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static void macvlan_hash_add(struct macvlan_dev *vlan) |
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{ |
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struct macvlan_port *port = vlan->port; |
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const unsigned char *addr = vlan->dev->dev_addr; |
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u32 idx = macvlan_eth_hash(addr); |
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|
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hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
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} |
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|
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static void macvlan_hash_del_source(struct macvlan_source_entry *entry) |
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{ |
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hlist_del_rcu(&entry->hlist); |
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kfree_rcu(entry, rcu); |
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} |
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|
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static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
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{ |
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hlist_del_rcu(&vlan->hlist); |
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if (sync) |
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synchronize_rcu(); |
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} |
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|
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static void macvlan_hash_change_addr(struct macvlan_dev *vlan, |
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const unsigned char *addr) |
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{ |
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macvlan_hash_del(vlan, true); |
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/* Now that we are unhashed it is safe to change the device |
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* address without confusing packet delivery. |
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*/ |
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memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); |
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macvlan_hash_add(vlan); |
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} |
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|
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static bool macvlan_addr_busy(const struct macvlan_port *port, |
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const unsigned char *addr) |
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{ |
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/* Test to see if the specified address is |
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* currently in use by the underlying device or |
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* another macvlan. |
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*/ |
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if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
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ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
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return true; |
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|
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if (macvlan_hash_lookup(port, addr)) |
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return true; |
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|
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return false; |
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} |
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|
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|
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static int macvlan_broadcast_one(struct sk_buff *skb, |
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const struct macvlan_dev *vlan, |
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const struct ethhdr *eth, bool local) |
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{ |
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struct net_device *dev = vlan->dev; |
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|
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if (local) |
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return __dev_forward_skb(dev, skb); |
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|
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skb->dev = dev; |
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if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
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skb->pkt_type = PACKET_BROADCAST; |
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else |
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skb->pkt_type = PACKET_MULTICAST; |
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|
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return 0; |
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} |
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|
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static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
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{ |
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return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); |
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} |
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|
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static unsigned int mc_hash(const struct macvlan_dev *vlan, |
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const unsigned char *addr) |
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{ |
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u32 val = __get_unaligned_cpu32(addr + 2); |
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|
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val ^= macvlan_hash_mix(vlan); |
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return hash_32(val, MACVLAN_MC_FILTER_BITS); |
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} |
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|
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static void macvlan_broadcast(struct sk_buff *skb, |
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const struct macvlan_port *port, |
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struct net_device *src, |
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enum macvlan_mode mode) |
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{ |
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const struct ethhdr *eth = eth_hdr(skb); |
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const struct macvlan_dev *vlan; |
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struct sk_buff *nskb; |
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unsigned int i; |
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int err; |
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unsigned int hash; |
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|
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if (skb->protocol == htons(ETH_P_PAUSE)) |
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return; |
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|
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for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
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hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
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if (vlan->dev == src || !(vlan->mode & mode)) |
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continue; |
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|
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hash = mc_hash(vlan, eth->h_dest); |
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if (!test_bit(hash, vlan->mc_filter)) |
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continue; |
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|
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err = NET_RX_DROP; |
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nskb = skb_clone(skb, GFP_ATOMIC); |
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if (likely(nskb)) |
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err = macvlan_broadcast_one( |
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nskb, vlan, eth, |
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mode == MACVLAN_MODE_BRIDGE) ?: |
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netif_rx_ni(nskb); |
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macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
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err == NET_RX_SUCCESS, true); |
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} |
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} |
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} |
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|
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static void macvlan_process_broadcast(struct work_struct *w) |
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{ |
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struct macvlan_port *port = container_of(w, struct macvlan_port, |
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bc_work); |
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struct sk_buff *skb; |
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struct sk_buff_head list; |
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|
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__skb_queue_head_init(&list); |
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|
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spin_lock_bh(&port->bc_queue.lock); |
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skb_queue_splice_tail_init(&port->bc_queue, &list); |
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spin_unlock_bh(&port->bc_queue.lock); |
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|
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while ((skb = __skb_dequeue(&list))) { |
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const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; |
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|
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rcu_read_lock(); |
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|
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if (!src) |
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/* frame comes from an external address */ |
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macvlan_broadcast(skb, port, NULL, |
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MACVLAN_MODE_PRIVATE | |
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MACVLAN_MODE_VEPA | |
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MACVLAN_MODE_PASSTHRU| |
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MACVLAN_MODE_BRIDGE); |
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else if (src->mode == MACVLAN_MODE_VEPA) |
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/* flood to everyone except source */ |
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macvlan_broadcast(skb, port, src->dev, |
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MACVLAN_MODE_VEPA | |
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MACVLAN_MODE_BRIDGE); |
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else |
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/* |
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* flood only to VEPA ports, bridge ports |
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* already saw the frame on the way out. |
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*/ |
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macvlan_broadcast(skb, port, src->dev, |
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MACVLAN_MODE_VEPA); |
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|
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rcu_read_unlock(); |
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|
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if (src) |
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dev_put(src->dev); |
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consume_skb(skb); |
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|
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cond_resched(); |
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} |
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} |
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|
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static void macvlan_broadcast_enqueue(struct macvlan_port *port, |
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const struct macvlan_dev *src, |
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struct sk_buff *skb) |
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{ |
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struct sk_buff *nskb; |
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int err = -ENOMEM; |
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|
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nskb = skb_clone(skb, GFP_ATOMIC); |
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if (!nskb) |
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goto err; |
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|
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MACVLAN_SKB_CB(nskb)->src = src; |
|
|
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spin_lock(&port->bc_queue.lock); |
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if (skb_queue_len(&port->bc_queue) < port->bc_queue_len_used) { |
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if (src) |
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dev_hold(src->dev); |
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__skb_queue_tail(&port->bc_queue, nskb); |
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err = 0; |
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} |
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spin_unlock(&port->bc_queue.lock); |
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|
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schedule_work(&port->bc_work); |
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|
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if (err) |
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goto free_nskb; |
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|
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return; |
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|
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free_nskb: |
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kfree_skb(nskb); |
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err: |
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atomic_long_inc(&skb->dev->rx_dropped); |
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} |
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|
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static void macvlan_flush_sources(struct macvlan_port *port, |
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struct macvlan_dev *vlan) |
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{ |
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int i; |
|
|
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for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
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struct hlist_node *h, *n; |
|
|
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hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { |
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struct macvlan_source_entry *entry; |
|
|
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entry = hlist_entry(h, struct macvlan_source_entry, |
|
hlist); |
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if (entry->vlan == vlan) |
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macvlan_hash_del_source(entry); |
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} |
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} |
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vlan->macaddr_count = 0; |
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} |
|
|
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static void macvlan_forward_source_one(struct sk_buff *skb, |
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struct macvlan_dev *vlan) |
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{ |
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struct sk_buff *nskb; |
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struct net_device *dev; |
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int len; |
|
int ret; |
|
|
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dev = vlan->dev; |
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if (unlikely(!(dev->flags & IFF_UP))) |
|
return; |
|
|
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nskb = skb_clone(skb, GFP_ATOMIC); |
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if (!nskb) |
|
return; |
|
|
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len = nskb->len + ETH_HLEN; |
|
nskb->dev = dev; |
|
|
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if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) |
|
nskb->pkt_type = PACKET_HOST; |
|
|
|
ret = netif_rx(nskb); |
|
macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
|
} |
|
|
|
static void macvlan_forward_source(struct sk_buff *skb, |
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struct macvlan_port *port, |
|
const unsigned char *addr) |
|
{ |
|
struct macvlan_source_entry *entry; |
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u32 idx = macvlan_eth_hash(addr); |
|
struct hlist_head *h = &port->vlan_source_hash[idx]; |
|
|
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hlist_for_each_entry_rcu(entry, h, hlist) { |
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if (ether_addr_equal_64bits(entry->addr, addr)) |
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macvlan_forward_source_one(skb, entry->vlan); |
|
} |
|
} |
|
|
|
/* called under rcu_read_lock() from netif_receive_skb */ |
|
static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
|
{ |
|
struct macvlan_port *port; |
|
struct sk_buff *skb = *pskb; |
|
const struct ethhdr *eth = eth_hdr(skb); |
|
const struct macvlan_dev *vlan; |
|
const struct macvlan_dev *src; |
|
struct net_device *dev; |
|
unsigned int len = 0; |
|
int ret; |
|
rx_handler_result_t handle_res; |
|
|
|
/* Packets from dev_loopback_xmit() do not have L2 header, bail out */ |
|
if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) |
|
return RX_HANDLER_PASS; |
|
|
|
port = macvlan_port_get_rcu(skb->dev); |
|
if (is_multicast_ether_addr(eth->h_dest)) { |
|
unsigned int hash; |
|
|
|
skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
|
if (!skb) |
|
return RX_HANDLER_CONSUMED; |
|
*pskb = skb; |
|
eth = eth_hdr(skb); |
|
macvlan_forward_source(skb, port, eth->h_source); |
|
src = macvlan_hash_lookup(port, eth->h_source); |
|
if (src && src->mode != MACVLAN_MODE_VEPA && |
|
src->mode != MACVLAN_MODE_BRIDGE) { |
|
/* forward to original port. */ |
|
vlan = src; |
|
ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
|
netif_rx(skb); |
|
handle_res = RX_HANDLER_CONSUMED; |
|
goto out; |
|
} |
|
|
|
hash = mc_hash(NULL, eth->h_dest); |
|
if (test_bit(hash, port->mc_filter)) |
|
macvlan_broadcast_enqueue(port, src, skb); |
|
|
|
return RX_HANDLER_PASS; |
|
} |
|
|
|
macvlan_forward_source(skb, port, eth->h_source); |
|
if (macvlan_passthru(port)) |
|
vlan = list_first_or_null_rcu(&port->vlans, |
|
struct macvlan_dev, list); |
|
else |
|
vlan = macvlan_hash_lookup(port, eth->h_dest); |
|
if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
|
return RX_HANDLER_PASS; |
|
|
|
dev = vlan->dev; |
|
if (unlikely(!(dev->flags & IFF_UP))) { |
|
kfree_skb(skb); |
|
return RX_HANDLER_CONSUMED; |
|
} |
|
len = skb->len + ETH_HLEN; |
|
skb = skb_share_check(skb, GFP_ATOMIC); |
|
if (!skb) { |
|
ret = NET_RX_DROP; |
|
handle_res = RX_HANDLER_CONSUMED; |
|
goto out; |
|
} |
|
|
|
*pskb = skb; |
|
skb->dev = dev; |
|
skb->pkt_type = PACKET_HOST; |
|
|
|
ret = NET_RX_SUCCESS; |
|
handle_res = RX_HANDLER_ANOTHER; |
|
out: |
|
macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
|
return handle_res; |
|
} |
|
|
|
static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
const struct macvlan_dev *vlan = netdev_priv(dev); |
|
const struct macvlan_port *port = vlan->port; |
|
const struct macvlan_dev *dest; |
|
|
|
if (vlan->mode == MACVLAN_MODE_BRIDGE) { |
|
const struct ethhdr *eth = skb_eth_hdr(skb); |
|
|
|
/* send to other bridge ports directly */ |
|
if (is_multicast_ether_addr(eth->h_dest)) { |
|
skb_reset_mac_header(skb); |
|
macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
|
goto xmit_world; |
|
} |
|
|
|
dest = macvlan_hash_lookup(port, eth->h_dest); |
|
if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { |
|
/* send to lowerdev first for its network taps */ |
|
dev_forward_skb(vlan->lowerdev, skb); |
|
|
|
return NET_XMIT_SUCCESS; |
|
} |
|
} |
|
xmit_world: |
|
skb->dev = vlan->lowerdev; |
|
return dev_queue_xmit_accel(skb, |
|
netdev_get_sb_channel(dev) ? dev : NULL); |
|
} |
|
|
|
static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
|
{ |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
return netpoll_send_skb(vlan->netpoll, skb); |
|
#else |
|
BUG(); |
|
return NETDEV_TX_OK; |
|
#endif |
|
} |
|
|
|
static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
|
struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
unsigned int len = skb->len; |
|
int ret; |
|
|
|
if (unlikely(netpoll_tx_running(dev))) |
|
return macvlan_netpoll_send_skb(vlan, skb); |
|
|
|
ret = macvlan_queue_xmit(skb, dev); |
|
|
|
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
|
struct vlan_pcpu_stats *pcpu_stats; |
|
|
|
pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
|
u64_stats_update_begin(&pcpu_stats->syncp); |
|
pcpu_stats->tx_packets++; |
|
pcpu_stats->tx_bytes += len; |
|
u64_stats_update_end(&pcpu_stats->syncp); |
|
} else { |
|
this_cpu_inc(vlan->pcpu_stats->tx_dropped); |
|
} |
|
return ret; |
|
} |
|
|
|
static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, |
|
unsigned short type, const void *daddr, |
|
const void *saddr, unsigned len) |
|
{ |
|
const struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
|
|
return dev_hard_header(skb, lowerdev, type, daddr, |
|
saddr ? : dev->dev_addr, len); |
|
} |
|
|
|
static const struct header_ops macvlan_hard_header_ops = { |
|
.create = macvlan_hard_header, |
|
.parse = eth_header_parse, |
|
.cache = eth_header_cache, |
|
.cache_update = eth_header_cache_update, |
|
}; |
|
|
|
static int macvlan_open(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
int err; |
|
|
|
if (macvlan_passthru(vlan->port)) { |
|
if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
|
err = dev_set_promiscuity(lowerdev, 1); |
|
if (err < 0) |
|
goto out; |
|
} |
|
goto hash_add; |
|
} |
|
|
|
err = -EADDRINUSE; |
|
if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
|
goto out; |
|
|
|
/* Attempt to populate accel_priv which is used to offload the L2 |
|
* forwarding requests for unicast packets. |
|
*/ |
|
if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) |
|
vlan->accel_priv = |
|
lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
|
|
|
/* If earlier attempt to offload failed, or accel_priv is not |
|
* populated we must add the unicast address to the lower device. |
|
*/ |
|
if (IS_ERR_OR_NULL(vlan->accel_priv)) { |
|
vlan->accel_priv = NULL; |
|
err = dev_uc_add(lowerdev, dev->dev_addr); |
|
if (err < 0) |
|
goto out; |
|
} |
|
|
|
if (dev->flags & IFF_ALLMULTI) { |
|
err = dev_set_allmulti(lowerdev, 1); |
|
if (err < 0) |
|
goto del_unicast; |
|
} |
|
|
|
if (dev->flags & IFF_PROMISC) { |
|
err = dev_set_promiscuity(lowerdev, 1); |
|
if (err < 0) |
|
goto clear_multi; |
|
} |
|
|
|
hash_add: |
|
macvlan_hash_add(vlan); |
|
return 0; |
|
|
|
clear_multi: |
|
if (dev->flags & IFF_ALLMULTI) |
|
dev_set_allmulti(lowerdev, -1); |
|
del_unicast: |
|
if (vlan->accel_priv) { |
|
lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
|
vlan->accel_priv); |
|
vlan->accel_priv = NULL; |
|
} else { |
|
dev_uc_del(lowerdev, dev->dev_addr); |
|
} |
|
out: |
|
return err; |
|
} |
|
|
|
static int macvlan_stop(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
|
|
if (vlan->accel_priv) { |
|
lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
|
vlan->accel_priv); |
|
vlan->accel_priv = NULL; |
|
} |
|
|
|
dev_uc_unsync(lowerdev, dev); |
|
dev_mc_unsync(lowerdev, dev); |
|
|
|
if (macvlan_passthru(vlan->port)) { |
|
if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
|
dev_set_promiscuity(lowerdev, -1); |
|
goto hash_del; |
|
} |
|
|
|
if (dev->flags & IFF_ALLMULTI) |
|
dev_set_allmulti(lowerdev, -1); |
|
|
|
if (dev->flags & IFF_PROMISC) |
|
dev_set_promiscuity(lowerdev, -1); |
|
|
|
dev_uc_del(lowerdev, dev->dev_addr); |
|
|
|
hash_del: |
|
macvlan_hash_del(vlan, !dev->dismantle); |
|
return 0; |
|
} |
|
|
|
static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
struct macvlan_port *port = vlan->port; |
|
int err; |
|
|
|
if (!(dev->flags & IFF_UP)) { |
|
/* Just copy in the new address */ |
|
ether_addr_copy(dev->dev_addr, addr); |
|
} else { |
|
/* Rehash and update the device filters */ |
|
if (macvlan_addr_busy(vlan->port, addr)) |
|
return -EADDRINUSE; |
|
|
|
if (!macvlan_passthru(port)) { |
|
err = dev_uc_add(lowerdev, addr); |
|
if (err) |
|
return err; |
|
|
|
dev_uc_del(lowerdev, dev->dev_addr); |
|
} |
|
|
|
macvlan_hash_change_addr(vlan, addr); |
|
} |
|
if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
|
/* Since addr_change isn't set, we are here due to lower |
|
* device change. Save the lower-dev address so we can |
|
* restore it later. |
|
*/ |
|
ether_addr_copy(vlan->port->perm_addr, |
|
lowerdev->dev_addr); |
|
} |
|
macvlan_clear_addr_change(port); |
|
return 0; |
|
} |
|
|
|
static int macvlan_set_mac_address(struct net_device *dev, void *p) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct sockaddr *addr = p; |
|
|
|
if (!is_valid_ether_addr(addr->sa_data)) |
|
return -EADDRNOTAVAIL; |
|
|
|
/* If the addresses are the same, this is a no-op */ |
|
if (ether_addr_equal(dev->dev_addr, addr->sa_data)) |
|
return 0; |
|
|
|
if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
|
macvlan_set_addr_change(vlan->port); |
|
return dev_set_mac_address(vlan->lowerdev, addr, NULL); |
|
} |
|
|
|
if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
|
return -EADDRINUSE; |
|
|
|
return macvlan_sync_address(dev, addr->sa_data); |
|
} |
|
|
|
static void macvlan_change_rx_flags(struct net_device *dev, int change) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
|
|
if (dev->flags & IFF_UP) { |
|
if (change & IFF_ALLMULTI) |
|
dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
|
if (change & IFF_PROMISC) |
|
dev_set_promiscuity(lowerdev, |
|
dev->flags & IFF_PROMISC ? 1 : -1); |
|
|
|
} |
|
} |
|
|
|
static void macvlan_compute_filter(unsigned long *mc_filter, |
|
struct net_device *dev, |
|
struct macvlan_dev *vlan) |
|
{ |
|
if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
|
bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
|
} else { |
|
struct netdev_hw_addr *ha; |
|
DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); |
|
|
|
bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); |
|
netdev_for_each_mc_addr(ha, dev) { |
|
__set_bit(mc_hash(vlan, ha->addr), filter); |
|
} |
|
|
|
__set_bit(mc_hash(vlan, dev->broadcast), filter); |
|
|
|
bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
|
} |
|
} |
|
|
|
static void macvlan_set_mac_lists(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
macvlan_compute_filter(vlan->mc_filter, dev, vlan); |
|
|
|
dev_uc_sync(vlan->lowerdev, dev); |
|
dev_mc_sync(vlan->lowerdev, dev); |
|
|
|
/* This is slightly inaccurate as we're including the subscription |
|
* list of vlan->lowerdev too. |
|
* |
|
* Bug alert: This only works if everyone has the same broadcast |
|
* address as lowerdev. As soon as someone changes theirs this |
|
* will break. |
|
* |
|
* However, this is already broken as when you change your broadcast |
|
* address we don't get called. |
|
* |
|
* The solution is to maintain a list of broadcast addresses like |
|
* we do for uc/mc, if you care. |
|
*/ |
|
macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); |
|
} |
|
|
|
static int macvlan_change_mtu(struct net_device *dev, int new_mtu) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
if (vlan->lowerdev->mtu < new_mtu) |
|
return -EINVAL; |
|
dev->mtu = new_mtu; |
|
return 0; |
|
} |
|
|
|
static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
|
{ |
|
struct net_device *real_dev = macvlan_dev_real_dev(dev); |
|
const struct net_device_ops *ops = real_dev->netdev_ops; |
|
struct ifreq ifrr; |
|
int err = -EOPNOTSUPP; |
|
|
|
strscpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); |
|
ifrr.ifr_ifru = ifr->ifr_ifru; |
|
|
|
switch (cmd) { |
|
case SIOCSHWTSTAMP: |
|
if (!net_eq(dev_net(dev), &init_net)) |
|
break; |
|
fallthrough; |
|
case SIOCGHWTSTAMP: |
|
if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
|
err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); |
|
break; |
|
} |
|
|
|
if (!err) |
|
ifr->ifr_ifru = ifrr.ifr_ifru; |
|
|
|
return err; |
|
} |
|
|
|
/* |
|
* macvlan network devices have devices nesting below it and are a special |
|
* "super class" of normal network devices; split their locks off into a |
|
* separate class since they always nest. |
|
*/ |
|
static struct lock_class_key macvlan_netdev_addr_lock_key; |
|
|
|
#define ALWAYS_ON_OFFLOADS \ |
|
(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ |
|
NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
|
|
|
#define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
|
|
|
#define MACVLAN_FEATURES \ |
|
(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
|
NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
|
NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
|
NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
|
|
|
#define MACVLAN_STATE_MASK \ |
|
((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
|
|
|
static void macvlan_set_lockdep_class(struct net_device *dev) |
|
{ |
|
netdev_lockdep_set_classes(dev); |
|
lockdep_set_class(&dev->addr_list_lock, |
|
&macvlan_netdev_addr_lock_key); |
|
} |
|
|
|
static int macvlan_init(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
const struct net_device *lowerdev = vlan->lowerdev; |
|
struct macvlan_port *port = vlan->port; |
|
|
|
dev->state = (dev->state & ~MACVLAN_STATE_MASK) | |
|
(lowerdev->state & MACVLAN_STATE_MASK); |
|
dev->features = lowerdev->features & MACVLAN_FEATURES; |
|
dev->features |= ALWAYS_ON_FEATURES; |
|
dev->hw_features |= NETIF_F_LRO; |
|
dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
|
dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
|
dev->hw_enc_features |= dev->features; |
|
dev->gso_max_size = lowerdev->gso_max_size; |
|
dev->gso_max_segs = lowerdev->gso_max_segs; |
|
dev->hard_header_len = lowerdev->hard_header_len; |
|
macvlan_set_lockdep_class(dev); |
|
|
|
vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
|
if (!vlan->pcpu_stats) |
|
return -ENOMEM; |
|
|
|
port->count += 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void macvlan_uninit(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct macvlan_port *port = vlan->port; |
|
|
|
free_percpu(vlan->pcpu_stats); |
|
|
|
macvlan_flush_sources(port, vlan); |
|
port->count -= 1; |
|
if (!port->count) |
|
macvlan_port_destroy(port->dev); |
|
} |
|
|
|
static void macvlan_dev_get_stats64(struct net_device *dev, |
|
struct rtnl_link_stats64 *stats) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
if (vlan->pcpu_stats) { |
|
struct vlan_pcpu_stats *p; |
|
u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
|
u32 rx_errors = 0, tx_dropped = 0; |
|
unsigned int start; |
|
int i; |
|
|
|
for_each_possible_cpu(i) { |
|
p = per_cpu_ptr(vlan->pcpu_stats, i); |
|
do { |
|
start = u64_stats_fetch_begin_irq(&p->syncp); |
|
rx_packets = p->rx_packets; |
|
rx_bytes = p->rx_bytes; |
|
rx_multicast = p->rx_multicast; |
|
tx_packets = p->tx_packets; |
|
tx_bytes = p->tx_bytes; |
|
} while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
|
|
|
stats->rx_packets += rx_packets; |
|
stats->rx_bytes += rx_bytes; |
|
stats->multicast += rx_multicast; |
|
stats->tx_packets += tx_packets; |
|
stats->tx_bytes += tx_bytes; |
|
/* rx_errors & tx_dropped are u32, updated |
|
* without syncp protection. |
|
*/ |
|
rx_errors += p->rx_errors; |
|
tx_dropped += p->tx_dropped; |
|
} |
|
stats->rx_errors = rx_errors; |
|
stats->rx_dropped = rx_errors; |
|
stats->tx_dropped = tx_dropped; |
|
} |
|
} |
|
|
|
static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
|
__be16 proto, u16 vid) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
|
|
return vlan_vid_add(lowerdev, proto, vid); |
|
} |
|
|
|
static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
|
__be16 proto, u16 vid) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *lowerdev = vlan->lowerdev; |
|
|
|
vlan_vid_del(lowerdev, proto, vid); |
|
return 0; |
|
} |
|
|
|
static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
|
struct net_device *dev, |
|
const unsigned char *addr, u16 vid, |
|
u16 flags, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
int err = -EINVAL; |
|
|
|
/* Support unicast filter only on passthru devices. |
|
* Multicast filter should be allowed on all devices. |
|
*/ |
|
if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
|
return -EOPNOTSUPP; |
|
|
|
if (flags & NLM_F_REPLACE) |
|
return -EOPNOTSUPP; |
|
|
|
if (is_unicast_ether_addr(addr)) |
|
err = dev_uc_add_excl(dev, addr); |
|
else if (is_multicast_ether_addr(addr)) |
|
err = dev_mc_add_excl(dev, addr); |
|
|
|
return err; |
|
} |
|
|
|
static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
|
struct net_device *dev, |
|
const unsigned char *addr, u16 vid) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
int err = -EINVAL; |
|
|
|
/* Support unicast filter only on passthru devices. |
|
* Multicast filter should be allowed on all devices. |
|
*/ |
|
if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
|
return -EOPNOTSUPP; |
|
|
|
if (is_unicast_ether_addr(addr)) |
|
err = dev_uc_del(dev, addr); |
|
else if (is_multicast_ether_addr(addr)) |
|
err = dev_mc_del(dev, addr); |
|
|
|
return err; |
|
} |
|
|
|
static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
|
struct ethtool_drvinfo *drvinfo) |
|
{ |
|
strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
|
strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); |
|
} |
|
|
|
static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
|
struct ethtool_link_ksettings *cmd) |
|
{ |
|
const struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
|
} |
|
|
|
static int macvlan_ethtool_get_ts_info(struct net_device *dev, |
|
struct ethtool_ts_info *info) |
|
{ |
|
struct net_device *real_dev = macvlan_dev_real_dev(dev); |
|
const struct ethtool_ops *ops = real_dev->ethtool_ops; |
|
struct phy_device *phydev = real_dev->phydev; |
|
|
|
if (phy_has_tsinfo(phydev)) { |
|
return phy_ts_info(phydev, info); |
|
} else if (ops->get_ts_info) { |
|
return ops->get_ts_info(real_dev, info); |
|
} else { |
|
info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | |
|
SOF_TIMESTAMPING_SOFTWARE; |
|
info->phc_index = -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static netdev_features_t macvlan_fix_features(struct net_device *dev, |
|
netdev_features_t features) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
netdev_features_t lowerdev_features = vlan->lowerdev->features; |
|
netdev_features_t mask; |
|
|
|
features |= NETIF_F_ALL_FOR_ALL; |
|
features &= (vlan->set_features | ~MACVLAN_FEATURES); |
|
mask = features; |
|
|
|
lowerdev_features &= (features | ~NETIF_F_LRO); |
|
features = netdev_increment_features(lowerdev_features, features, mask); |
|
features |= ALWAYS_ON_FEATURES; |
|
features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
|
|
|
return features; |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
static void macvlan_dev_poll_controller(struct net_device *dev) |
|
{ |
|
return; |
|
} |
|
|
|
static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct net_device *real_dev = vlan->lowerdev; |
|
struct netpoll *netpoll; |
|
int err; |
|
|
|
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
|
err = -ENOMEM; |
|
if (!netpoll) |
|
goto out; |
|
|
|
err = __netpoll_setup(netpoll, real_dev); |
|
if (err) { |
|
kfree(netpoll); |
|
goto out; |
|
} |
|
|
|
vlan->netpoll = netpoll; |
|
|
|
out: |
|
return err; |
|
} |
|
|
|
static void macvlan_dev_netpoll_cleanup(struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct netpoll *netpoll = vlan->netpoll; |
|
|
|
if (!netpoll) |
|
return; |
|
|
|
vlan->netpoll = NULL; |
|
|
|
__netpoll_free(netpoll); |
|
} |
|
#endif /* CONFIG_NET_POLL_CONTROLLER */ |
|
|
|
static int macvlan_dev_get_iflink(const struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
return vlan->lowerdev->ifindex; |
|
} |
|
|
|
static const struct ethtool_ops macvlan_ethtool_ops = { |
|
.get_link = ethtool_op_get_link, |
|
.get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
|
.get_drvinfo = macvlan_ethtool_get_drvinfo, |
|
.get_ts_info = macvlan_ethtool_get_ts_info, |
|
}; |
|
|
|
static const struct net_device_ops macvlan_netdev_ops = { |
|
.ndo_init = macvlan_init, |
|
.ndo_uninit = macvlan_uninit, |
|
.ndo_open = macvlan_open, |
|
.ndo_stop = macvlan_stop, |
|
.ndo_start_xmit = macvlan_start_xmit, |
|
.ndo_change_mtu = macvlan_change_mtu, |
|
.ndo_do_ioctl = macvlan_do_ioctl, |
|
.ndo_fix_features = macvlan_fix_features, |
|
.ndo_change_rx_flags = macvlan_change_rx_flags, |
|
.ndo_set_mac_address = macvlan_set_mac_address, |
|
.ndo_set_rx_mode = macvlan_set_mac_lists, |
|
.ndo_get_stats64 = macvlan_dev_get_stats64, |
|
.ndo_validate_addr = eth_validate_addr, |
|
.ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
|
.ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, |
|
.ndo_fdb_add = macvlan_fdb_add, |
|
.ndo_fdb_del = macvlan_fdb_del, |
|
.ndo_fdb_dump = ndo_dflt_fdb_dump, |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
.ndo_poll_controller = macvlan_dev_poll_controller, |
|
.ndo_netpoll_setup = macvlan_dev_netpoll_setup, |
|
.ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, |
|
#endif |
|
.ndo_get_iflink = macvlan_dev_get_iflink, |
|
.ndo_features_check = passthru_features_check, |
|
.ndo_change_proto_down = dev_change_proto_down_generic, |
|
}; |
|
|
|
void macvlan_common_setup(struct net_device *dev) |
|
{ |
|
ether_setup(dev); |
|
|
|
dev->min_mtu = 0; |
|
dev->max_mtu = ETH_MAX_MTU; |
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
|
netif_keep_dst(dev); |
|
dev->priv_flags |= IFF_UNICAST_FLT; |
|
dev->netdev_ops = &macvlan_netdev_ops; |
|
dev->needs_free_netdev = true; |
|
dev->header_ops = &macvlan_hard_header_ops; |
|
dev->ethtool_ops = &macvlan_ethtool_ops; |
|
} |
|
EXPORT_SYMBOL_GPL(macvlan_common_setup); |
|
|
|
static void macvlan_setup(struct net_device *dev) |
|
{ |
|
macvlan_common_setup(dev); |
|
dev->priv_flags |= IFF_NO_QUEUE; |
|
} |
|
|
|
static int macvlan_port_create(struct net_device *dev) |
|
{ |
|
struct macvlan_port *port; |
|
unsigned int i; |
|
int err; |
|
|
|
if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) |
|
return -EINVAL; |
|
|
|
if (netdev_is_rx_handler_busy(dev)) |
|
return -EBUSY; |
|
|
|
port = kzalloc(sizeof(*port), GFP_KERNEL); |
|
if (port == NULL) |
|
return -ENOMEM; |
|
|
|
port->dev = dev; |
|
ether_addr_copy(port->perm_addr, dev->dev_addr); |
|
INIT_LIST_HEAD(&port->vlans); |
|
for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
|
INIT_HLIST_HEAD(&port->vlan_hash[i]); |
|
for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
|
INIT_HLIST_HEAD(&port->vlan_source_hash[i]); |
|
|
|
port->bc_queue_len_used = 0; |
|
skb_queue_head_init(&port->bc_queue); |
|
INIT_WORK(&port->bc_work, macvlan_process_broadcast); |
|
|
|
err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
|
if (err) |
|
kfree(port); |
|
else |
|
dev->priv_flags |= IFF_MACVLAN_PORT; |
|
return err; |
|
} |
|
|
|
static void macvlan_port_destroy(struct net_device *dev) |
|
{ |
|
struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
|
struct sk_buff *skb; |
|
|
|
dev->priv_flags &= ~IFF_MACVLAN_PORT; |
|
netdev_rx_handler_unregister(dev); |
|
|
|
/* After this point, no packet can schedule bc_work anymore, |
|
* but we need to cancel it and purge left skbs if any. |
|
*/ |
|
cancel_work_sync(&port->bc_work); |
|
|
|
while ((skb = __skb_dequeue(&port->bc_queue))) { |
|
const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; |
|
|
|
if (src) |
|
dev_put(src->dev); |
|
|
|
kfree_skb(skb); |
|
} |
|
|
|
/* If the lower device address has been changed by passthru |
|
* macvlan, put it back. |
|
*/ |
|
if (macvlan_passthru(port) && |
|
!ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { |
|
struct sockaddr sa; |
|
|
|
sa.sa_family = port->dev->type; |
|
memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); |
|
dev_set_mac_address(port->dev, &sa, NULL); |
|
} |
|
|
|
kfree(port); |
|
} |
|
|
|
static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct nlattr *nla, *head; |
|
int rem, len; |
|
|
|
if (tb[IFLA_ADDRESS]) { |
|
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
|
return -EINVAL; |
|
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
|
return -EADDRNOTAVAIL; |
|
} |
|
|
|
if (!data) |
|
return 0; |
|
|
|
if (data[IFLA_MACVLAN_FLAGS] && |
|
nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
|
return -EINVAL; |
|
|
|
if (data[IFLA_MACVLAN_MODE]) { |
|
switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
|
case MACVLAN_MODE_PRIVATE: |
|
case MACVLAN_MODE_VEPA: |
|
case MACVLAN_MODE_BRIDGE: |
|
case MACVLAN_MODE_PASSTHRU: |
|
case MACVLAN_MODE_SOURCE: |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
|
switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
|
case MACVLAN_MACADDR_ADD: |
|
case MACVLAN_MACADDR_DEL: |
|
case MACVLAN_MACADDR_FLUSH: |
|
case MACVLAN_MACADDR_SET: |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (data[IFLA_MACVLAN_MACADDR]) { |
|
if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
|
return -EINVAL; |
|
|
|
if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) |
|
return -EADDRNOTAVAIL; |
|
} |
|
|
|
if (data[IFLA_MACVLAN_MACADDR_DATA]) { |
|
head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); |
|
len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); |
|
|
|
nla_for_each_attr(nla, head, len, rem) { |
|
if (nla_type(nla) != IFLA_MACVLAN_MACADDR || |
|
nla_len(nla) != ETH_ALEN) |
|
return -EINVAL; |
|
|
|
if (!is_valid_ether_addr(nla_data(nla))) |
|
return -EADDRNOTAVAIL; |
|
} |
|
} |
|
|
|
if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* reconfigure list of remote source mac address |
|
* (only for macvlan devices in source mode) |
|
* Note regarding alignment: all netlink data is aligned to 4 Byte, which |
|
* suffices for both ether_addr_copy and ether_addr_equal_64bits usage. |
|
*/ |
|
static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, |
|
struct nlattr *data[]) |
|
{ |
|
char *addr = NULL; |
|
int ret, rem, len; |
|
struct nlattr *nla, *head; |
|
struct macvlan_source_entry *entry; |
|
|
|
if (data[IFLA_MACVLAN_MACADDR]) |
|
addr = nla_data(data[IFLA_MACVLAN_MACADDR]); |
|
|
|
if (mode == MACVLAN_MACADDR_ADD) { |
|
if (!addr) |
|
return -EINVAL; |
|
|
|
return macvlan_hash_add_source(vlan, addr); |
|
|
|
} else if (mode == MACVLAN_MACADDR_DEL) { |
|
if (!addr) |
|
return -EINVAL; |
|
|
|
entry = macvlan_hash_lookup_source(vlan, addr); |
|
if (entry) { |
|
macvlan_hash_del_source(entry); |
|
vlan->macaddr_count--; |
|
} |
|
} else if (mode == MACVLAN_MACADDR_FLUSH) { |
|
macvlan_flush_sources(vlan->port, vlan); |
|
} else if (mode == MACVLAN_MACADDR_SET) { |
|
macvlan_flush_sources(vlan->port, vlan); |
|
|
|
if (addr) { |
|
ret = macvlan_hash_add_source(vlan, addr); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
if (!data[IFLA_MACVLAN_MACADDR_DATA]) |
|
return 0; |
|
|
|
head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); |
|
len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); |
|
|
|
nla_for_each_attr(nla, head, len, rem) { |
|
addr = nla_data(nla); |
|
ret = macvlan_hash_add_source(vlan, addr); |
|
if (ret) |
|
return ret; |
|
} |
|
} else { |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct macvlan_port *port; |
|
struct net_device *lowerdev; |
|
int err; |
|
int macmode; |
|
bool create = false; |
|
|
|
if (!tb[IFLA_LINK]) |
|
return -EINVAL; |
|
|
|
lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
|
if (lowerdev == NULL) |
|
return -ENODEV; |
|
|
|
/* When creating macvlans or macvtaps on top of other macvlans - use |
|
* the real device as the lowerdev. |
|
*/ |
|
if (netif_is_macvlan(lowerdev)) |
|
lowerdev = macvlan_dev_real_dev(lowerdev); |
|
|
|
if (!tb[IFLA_MTU]) |
|
dev->mtu = lowerdev->mtu; |
|
else if (dev->mtu > lowerdev->mtu) |
|
return -EINVAL; |
|
|
|
/* MTU range: 68 - lowerdev->max_mtu */ |
|
dev->min_mtu = ETH_MIN_MTU; |
|
dev->max_mtu = lowerdev->max_mtu; |
|
|
|
if (!tb[IFLA_ADDRESS]) |
|
eth_hw_addr_random(dev); |
|
|
|
if (!netif_is_macvlan_port(lowerdev)) { |
|
err = macvlan_port_create(lowerdev); |
|
if (err < 0) |
|
return err; |
|
create = true; |
|
} |
|
port = macvlan_port_get_rtnl(lowerdev); |
|
|
|
/* Only 1 macvlan device can be created in passthru mode */ |
|
if (macvlan_passthru(port)) { |
|
/* The macvlan port must be not created this time, |
|
* still goto destroy_macvlan_port for readability. |
|
*/ |
|
err = -EINVAL; |
|
goto destroy_macvlan_port; |
|
} |
|
|
|
vlan->lowerdev = lowerdev; |
|
vlan->dev = dev; |
|
vlan->port = port; |
|
vlan->set_features = MACVLAN_FEATURES; |
|
|
|
vlan->mode = MACVLAN_MODE_VEPA; |
|
if (data && data[IFLA_MACVLAN_MODE]) |
|
vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
|
|
|
if (data && data[IFLA_MACVLAN_FLAGS]) |
|
vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); |
|
|
|
if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
|
if (port->count) { |
|
err = -EINVAL; |
|
goto destroy_macvlan_port; |
|
} |
|
macvlan_set_passthru(port); |
|
eth_hw_addr_inherit(dev, lowerdev); |
|
} |
|
|
|
if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
|
if (vlan->mode != MACVLAN_MODE_SOURCE) { |
|
err = -EINVAL; |
|
goto destroy_macvlan_port; |
|
} |
|
macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
|
err = macvlan_changelink_sources(vlan, macmode, data); |
|
if (err) |
|
goto destroy_macvlan_port; |
|
} |
|
|
|
vlan->bc_queue_len_req = MACVLAN_DEFAULT_BC_QUEUE_LEN; |
|
if (data && data[IFLA_MACVLAN_BC_QUEUE_LEN]) |
|
vlan->bc_queue_len_req = nla_get_u32(data[IFLA_MACVLAN_BC_QUEUE_LEN]); |
|
|
|
err = register_netdevice(dev); |
|
if (err < 0) |
|
goto destroy_macvlan_port; |
|
|
|
dev->priv_flags |= IFF_MACVLAN; |
|
err = netdev_upper_dev_link(lowerdev, dev, extack); |
|
if (err) |
|
goto unregister_netdev; |
|
|
|
list_add_tail_rcu(&vlan->list, &port->vlans); |
|
update_port_bc_queue_len(vlan->port); |
|
netif_stacked_transfer_operstate(lowerdev, dev); |
|
linkwatch_fire_event(dev); |
|
|
|
return 0; |
|
|
|
unregister_netdev: |
|
/* macvlan_uninit would free the macvlan port */ |
|
unregister_netdevice(dev); |
|
return err; |
|
destroy_macvlan_port: |
|
/* the macvlan port may be freed by macvlan_uninit when fail to register. |
|
* so we destroy the macvlan port only when it's valid. |
|
*/ |
|
if (create && macvlan_port_get_rtnl(lowerdev)) |
|
macvlan_port_destroy(port->dev); |
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
|
|
|
static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
return macvlan_common_newlink(src_net, dev, tb, data, extack); |
|
} |
|
|
|
void macvlan_dellink(struct net_device *dev, struct list_head *head) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
if (vlan->mode == MACVLAN_MODE_SOURCE) |
|
macvlan_flush_sources(vlan->port, vlan); |
|
list_del_rcu(&vlan->list); |
|
update_port_bc_queue_len(vlan->port); |
|
unregister_netdevice_queue(dev, head); |
|
netdev_upper_dev_unlink(vlan->lowerdev, dev); |
|
} |
|
EXPORT_SYMBOL_GPL(macvlan_dellink); |
|
|
|
static int macvlan_changelink(struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
enum macvlan_mode mode; |
|
bool set_mode = false; |
|
enum macvlan_macaddr_mode macmode; |
|
int ret; |
|
|
|
/* Validate mode, but don't set yet: setting flags may fail. */ |
|
if (data && data[IFLA_MACVLAN_MODE]) { |
|
set_mode = true; |
|
mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
|
/* Passthrough mode can't be set or cleared dynamically */ |
|
if ((mode == MACVLAN_MODE_PASSTHRU) != |
|
(vlan->mode == MACVLAN_MODE_PASSTHRU)) |
|
return -EINVAL; |
|
if (vlan->mode == MACVLAN_MODE_SOURCE && |
|
vlan->mode != mode) |
|
macvlan_flush_sources(vlan->port, vlan); |
|
} |
|
|
|
if (data && data[IFLA_MACVLAN_FLAGS]) { |
|
__u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); |
|
bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; |
|
if (macvlan_passthru(vlan->port) && promisc) { |
|
int err; |
|
|
|
if (flags & MACVLAN_FLAG_NOPROMISC) |
|
err = dev_set_promiscuity(vlan->lowerdev, -1); |
|
else |
|
err = dev_set_promiscuity(vlan->lowerdev, 1); |
|
if (err < 0) |
|
return err; |
|
} |
|
vlan->flags = flags; |
|
} |
|
|
|
if (data && data[IFLA_MACVLAN_BC_QUEUE_LEN]) { |
|
vlan->bc_queue_len_req = nla_get_u32(data[IFLA_MACVLAN_BC_QUEUE_LEN]); |
|
update_port_bc_queue_len(vlan->port); |
|
} |
|
|
|
if (set_mode) |
|
vlan->mode = mode; |
|
if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
|
if (vlan->mode != MACVLAN_MODE_SOURCE) |
|
return -EINVAL; |
|
macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
|
ret = macvlan_changelink_sources(vlan, macmode, data); |
|
if (ret) |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
|
{ |
|
if (vlan->macaddr_count == 0) |
|
return 0; |
|
return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ |
|
+ vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); |
|
} |
|
|
|
static size_t macvlan_get_size(const struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
|
|
return (0 |
|
+ nla_total_size(4) /* IFLA_MACVLAN_MODE */ |
|
+ nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ |
|
+ nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
|
+ macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ |
|
+ nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN */ |
|
+ nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN_USED */ |
|
); |
|
} |
|
|
|
static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
|
const struct macvlan_dev *vlan, |
|
const int i) |
|
{ |
|
struct hlist_head *h = &vlan->port->vlan_source_hash[i]; |
|
struct macvlan_source_entry *entry; |
|
|
|
hlist_for_each_entry_rcu(entry, h, hlist) { |
|
if (entry->vlan != vlan) |
|
continue; |
|
if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
static int macvlan_fill_info(struct sk_buff *skb, |
|
const struct net_device *dev) |
|
{ |
|
struct macvlan_dev *vlan = netdev_priv(dev); |
|
struct macvlan_port *port = vlan->port; |
|
int i; |
|
struct nlattr *nest; |
|
|
|
if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
|
goto nla_put_failure; |
|
if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
|
goto nla_put_failure; |
|
if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
|
goto nla_put_failure; |
|
if (vlan->macaddr_count > 0) { |
|
nest = nla_nest_start_noflag(skb, IFLA_MACVLAN_MACADDR_DATA); |
|
if (nest == NULL) |
|
goto nla_put_failure; |
|
|
|
for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
|
if (macvlan_fill_info_macaddr(skb, vlan, i)) |
|
goto nla_put_failure; |
|
} |
|
nla_nest_end(skb, nest); |
|
} |
|
if (nla_put_u32(skb, IFLA_MACVLAN_BC_QUEUE_LEN, vlan->bc_queue_len_req)) |
|
goto nla_put_failure; |
|
if (nla_put_u32(skb, IFLA_MACVLAN_BC_QUEUE_LEN_USED, port->bc_queue_len_used)) |
|
goto nla_put_failure; |
|
return 0; |
|
|
|
nla_put_failure: |
|
return -EMSGSIZE; |
|
} |
|
|
|
static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { |
|
[IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
|
[IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, |
|
[IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
|
[IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, |
|
[IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, |
|
[IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, |
|
[IFLA_MACVLAN_BC_QUEUE_LEN] = { .type = NLA_U32 }, |
|
[IFLA_MACVLAN_BC_QUEUE_LEN_USED] = { .type = NLA_REJECT }, |
|
}; |
|
|
|
int macvlan_link_register(struct rtnl_link_ops *ops) |
|
{ |
|
/* common fields */ |
|
ops->validate = macvlan_validate; |
|
ops->maxtype = IFLA_MACVLAN_MAX; |
|
ops->policy = macvlan_policy; |
|
ops->changelink = macvlan_changelink; |
|
ops->get_size = macvlan_get_size; |
|
ops->fill_info = macvlan_fill_info; |
|
|
|
return rtnl_link_register(ops); |
|
}; |
|
EXPORT_SYMBOL_GPL(macvlan_link_register); |
|
|
|
static struct net *macvlan_get_link_net(const struct net_device *dev) |
|
{ |
|
return dev_net(macvlan_dev_real_dev(dev)); |
|
} |
|
|
|
static struct rtnl_link_ops macvlan_link_ops = { |
|
.kind = "macvlan", |
|
.setup = macvlan_setup, |
|
.newlink = macvlan_newlink, |
|
.dellink = macvlan_dellink, |
|
.get_link_net = macvlan_get_link_net, |
|
.priv_size = sizeof(struct macvlan_dev), |
|
}; |
|
|
|
static void update_port_bc_queue_len(struct macvlan_port *port) |
|
{ |
|
u32 max_bc_queue_len_req = 0; |
|
struct macvlan_dev *vlan; |
|
|
|
list_for_each_entry(vlan, &port->vlans, list) { |
|
if (vlan->bc_queue_len_req > max_bc_queue_len_req) |
|
max_bc_queue_len_req = vlan->bc_queue_len_req; |
|
} |
|
port->bc_queue_len_used = max_bc_queue_len_req; |
|
} |
|
|
|
static int macvlan_device_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct macvlan_dev *vlan, *next; |
|
struct macvlan_port *port; |
|
LIST_HEAD(list_kill); |
|
|
|
if (!netif_is_macvlan_port(dev)) |
|
return NOTIFY_DONE; |
|
|
|
port = macvlan_port_get_rtnl(dev); |
|
|
|
switch (event) { |
|
case NETDEV_UP: |
|
case NETDEV_DOWN: |
|
case NETDEV_CHANGE: |
|
list_for_each_entry(vlan, &port->vlans, list) |
|
netif_stacked_transfer_operstate(vlan->lowerdev, |
|
vlan->dev); |
|
break; |
|
case NETDEV_FEAT_CHANGE: |
|
list_for_each_entry(vlan, &port->vlans, list) { |
|
vlan->dev->gso_max_size = dev->gso_max_size; |
|
vlan->dev->gso_max_segs = dev->gso_max_segs; |
|
netdev_update_features(vlan->dev); |
|
} |
|
break; |
|
case NETDEV_CHANGEMTU: |
|
list_for_each_entry(vlan, &port->vlans, list) { |
|
if (vlan->dev->mtu <= dev->mtu) |
|
continue; |
|
dev_set_mtu(vlan->dev, dev->mtu); |
|
} |
|
break; |
|
case NETDEV_CHANGEADDR: |
|
if (!macvlan_passthru(port)) |
|
return NOTIFY_DONE; |
|
|
|
vlan = list_first_entry_or_null(&port->vlans, |
|
struct macvlan_dev, |
|
list); |
|
|
|
if (vlan && macvlan_sync_address(vlan->dev, dev->dev_addr)) |
|
return NOTIFY_BAD; |
|
|
|
break; |
|
case NETDEV_UNREGISTER: |
|
/* twiddle thumbs on netns device moves */ |
|
if (dev->reg_state != NETREG_UNREGISTERING) |
|
break; |
|
|
|
list_for_each_entry_safe(vlan, next, &port->vlans, list) |
|
vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
|
unregister_netdevice_many(&list_kill); |
|
break; |
|
case NETDEV_PRE_TYPE_CHANGE: |
|
/* Forbid underlaying device to change its type. */ |
|
return NOTIFY_BAD; |
|
|
|
case NETDEV_NOTIFY_PEERS: |
|
case NETDEV_BONDING_FAILOVER: |
|
case NETDEV_RESEND_IGMP: |
|
/* Propagate to all vlans */ |
|
list_for_each_entry(vlan, &port->vlans, list) |
|
call_netdevice_notifiers(event, vlan->dev); |
|
} |
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct notifier_block macvlan_notifier_block __read_mostly = { |
|
.notifier_call = macvlan_device_event, |
|
}; |
|
|
|
static int __init macvlan_init_module(void) |
|
{ |
|
int err; |
|
|
|
register_netdevice_notifier(&macvlan_notifier_block); |
|
|
|
err = macvlan_link_register(&macvlan_link_ops); |
|
if (err < 0) |
|
goto err1; |
|
return 0; |
|
err1: |
|
unregister_netdevice_notifier(&macvlan_notifier_block); |
|
return err; |
|
} |
|
|
|
static void __exit macvlan_cleanup_module(void) |
|
{ |
|
rtnl_link_unregister(&macvlan_link_ops); |
|
unregister_netdevice_notifier(&macvlan_notifier_block); |
|
} |
|
|
|
module_init(macvlan_init_module); |
|
module_exit(macvlan_cleanup_module); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Patrick McHardy <[email protected]>"); |
|
MODULE_DESCRIPTION("Driver for MAC address based VLANs"); |
|
MODULE_ALIAS_RTNL_LINK("macvlan");
|
|
|