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-rw-r--r--net/core/Makefile3
-rw-r--r--net/core/dev.c430
-rw-r--r--net/core/dev_addr_lists.c478
3 files changed, 483 insertions, 428 deletions
diff --git a/net/core/Makefile b/net/core/Makefile
index 08791ac3e05a..0a899f1aadb9 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -8,7 +8,8 @@ obj-y := sock.o request_sock.o skbuff.o iovec.o datagram.o stream.o scm.o \
8obj-$(CONFIG_SYSCTL) += sysctl_net_core.o 8obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
9 9
10obj-y += dev.o ethtool.o dev_mcast.o dst.o netevent.o \ 10obj-y += dev.o ethtool.o dev_mcast.o dst.o netevent.o \
11 neighbour.o rtnetlink.o utils.o link_watch.o filter.o 11 neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
12 dev_addr_lists.o
12 13
13obj-$(CONFIG_XFRM) += flow.o 14obj-$(CONFIG_XFRM) += flow.o
14obj-y += net-sysfs.o 15obj-y += net-sysfs.o
diff --git a/net/core/dev.c b/net/core/dev.c
index c6b52068d5ec..949c62dba719 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3968,314 +3968,6 @@ void dev_set_rx_mode(struct net_device *dev)
3968 netif_addr_unlock_bh(dev); 3968 netif_addr_unlock_bh(dev);
3969} 3969}
3970 3970
3971/* hw addresses list handling functions */
3972
3973static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
3974 int addr_len, unsigned char addr_type)
3975{
3976 struct netdev_hw_addr *ha;
3977 int alloc_size;
3978
3979 if (addr_len > MAX_ADDR_LEN)
3980 return -EINVAL;
3981
3982 list_for_each_entry(ha, &list->list, list) {
3983 if (!memcmp(ha->addr, addr, addr_len) &&
3984 ha->type == addr_type) {
3985 ha->refcount++;
3986 return 0;
3987 }
3988 }
3989
3990
3991 alloc_size = sizeof(*ha);
3992 if (alloc_size < L1_CACHE_BYTES)
3993 alloc_size = L1_CACHE_BYTES;
3994 ha = kmalloc(alloc_size, GFP_ATOMIC);
3995 if (!ha)
3996 return -ENOMEM;
3997 memcpy(ha->addr, addr, addr_len);
3998 ha->type = addr_type;
3999 ha->refcount = 1;
4000 ha->synced = false;
4001 list_add_tail_rcu(&ha->list, &list->list);
4002 list->count++;
4003 return 0;
4004}
4005
4006static void ha_rcu_free(struct rcu_head *head)
4007{
4008 struct netdev_hw_addr *ha;
4009
4010 ha = container_of(head, struct netdev_hw_addr, rcu_head);
4011 kfree(ha);
4012}
4013
4014static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr,
4015 int addr_len, unsigned char addr_type)
4016{
4017 struct netdev_hw_addr *ha;
4018
4019 list_for_each_entry(ha, &list->list, list) {
4020 if (!memcmp(ha->addr, addr, addr_len) &&
4021 (ha->type == addr_type || !addr_type)) {
4022 if (--ha->refcount)
4023 return 0;
4024 list_del_rcu(&ha->list);
4025 call_rcu(&ha->rcu_head, ha_rcu_free);
4026 list->count--;
4027 return 0;
4028 }
4029 }
4030 return -ENOENT;
4031}
4032
4033static int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
4034 struct netdev_hw_addr_list *from_list,
4035 int addr_len,
4036 unsigned char addr_type)
4037{
4038 int err;
4039 struct netdev_hw_addr *ha, *ha2;
4040 unsigned char type;
4041
4042 list_for_each_entry(ha, &from_list->list, list) {
4043 type = addr_type ? addr_type : ha->type;
4044 err = __hw_addr_add(to_list, ha->addr, addr_len, type);
4045 if (err)
4046 goto unroll;
4047 }
4048 return 0;
4049
4050unroll:
4051 list_for_each_entry(ha2, &from_list->list, list) {
4052 if (ha2 == ha)
4053 break;
4054 type = addr_type ? addr_type : ha2->type;
4055 __hw_addr_del(to_list, ha2->addr, addr_len, type);
4056 }
4057 return err;
4058}
4059
4060static void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
4061 struct netdev_hw_addr_list *from_list,
4062 int addr_len,
4063 unsigned char addr_type)
4064{
4065 struct netdev_hw_addr *ha;
4066 unsigned char type;
4067
4068 list_for_each_entry(ha, &from_list->list, list) {
4069 type = addr_type ? addr_type : ha->type;
4070 __hw_addr_del(to_list, ha->addr, addr_len, addr_type);
4071 }
4072}
4073
4074static int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4075 struct netdev_hw_addr_list *from_list,
4076 int addr_len)
4077{
4078 int err = 0;
4079 struct netdev_hw_addr *ha, *tmp;
4080
4081 list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
4082 if (!ha->synced) {
4083 err = __hw_addr_add(to_list, ha->addr,
4084 addr_len, ha->type);
4085 if (err)
4086 break;
4087 ha->synced = true;
4088 ha->refcount++;
4089 } else if (ha->refcount == 1) {
4090 __hw_addr_del(to_list, ha->addr, addr_len, ha->type);
4091 __hw_addr_del(from_list, ha->addr, addr_len, ha->type);
4092 }
4093 }
4094 return err;
4095}
4096
4097static void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4098 struct netdev_hw_addr_list *from_list,
4099 int addr_len)
4100{
4101 struct netdev_hw_addr *ha, *tmp;
4102
4103 list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
4104 if (ha->synced) {
4105 __hw_addr_del(to_list, ha->addr,
4106 addr_len, ha->type);
4107 ha->synced = false;
4108 __hw_addr_del(from_list, ha->addr,
4109 addr_len, ha->type);
4110 }
4111 }
4112}
4113
4114static void __hw_addr_flush(struct netdev_hw_addr_list *list)
4115{
4116 struct netdev_hw_addr *ha, *tmp;
4117
4118 list_for_each_entry_safe(ha, tmp, &list->list, list) {
4119 list_del_rcu(&ha->list);
4120 call_rcu(&ha->rcu_head, ha_rcu_free);
4121 }
4122 list->count = 0;
4123}
4124
4125static void __hw_addr_init(struct netdev_hw_addr_list *list)
4126{
4127 INIT_LIST_HEAD(&list->list);
4128 list->count = 0;
4129}
4130
4131/* Device addresses handling functions */
4132
4133static void dev_addr_flush(struct net_device *dev)
4134{
4135 /* rtnl_mutex must be held here */
4136
4137 __hw_addr_flush(&dev->dev_addrs);
4138 dev->dev_addr = NULL;
4139}
4140
4141static int dev_addr_init(struct net_device *dev)
4142{
4143 unsigned char addr[MAX_ADDR_LEN];
4144 struct netdev_hw_addr *ha;
4145 int err;
4146
4147 /* rtnl_mutex must be held here */
4148
4149 __hw_addr_init(&dev->dev_addrs);
4150 memset(addr, 0, sizeof(addr));
4151 err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr),
4152 NETDEV_HW_ADDR_T_LAN);
4153 if (!err) {
4154 /*
4155 * Get the first (previously created) address from the list
4156 * and set dev_addr pointer to this location.
4157 */
4158 ha = list_first_entry(&dev->dev_addrs.list,
4159 struct netdev_hw_addr, list);
4160 dev->dev_addr = ha->addr;
4161 }
4162 return err;
4163}
4164
4165/**
4166 * dev_addr_add - Add a device address
4167 * @dev: device
4168 * @addr: address to add
4169 * @addr_type: address type
4170 *
4171 * Add a device address to the device or increase the reference count if
4172 * it already exists.
4173 *
4174 * The caller must hold the rtnl_mutex.
4175 */
4176int dev_addr_add(struct net_device *dev, unsigned char *addr,
4177 unsigned char addr_type)
4178{
4179 int err;
4180
4181 ASSERT_RTNL();
4182
4183 err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type);
4184 if (!err)
4185 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
4186 return err;
4187}
4188EXPORT_SYMBOL(dev_addr_add);
4189
4190/**
4191 * dev_addr_del - Release a device address.
4192 * @dev: device
4193 * @addr: address to delete
4194 * @addr_type: address type
4195 *
4196 * Release reference to a device address and remove it from the device
4197 * if the reference count drops to zero.
4198 *
4199 * The caller must hold the rtnl_mutex.
4200 */
4201int dev_addr_del(struct net_device *dev, unsigned char *addr,
4202 unsigned char addr_type)
4203{
4204 int err;
4205 struct netdev_hw_addr *ha;
4206
4207 ASSERT_RTNL();
4208
4209 /*
4210 * We can not remove the first address from the list because
4211 * dev->dev_addr points to that.
4212 */
4213 ha = list_first_entry(&dev->dev_addrs.list,
4214 struct netdev_hw_addr, list);
4215 if (ha->addr == dev->dev_addr && ha->refcount == 1)
4216 return -ENOENT;
4217
4218 err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len,
4219 addr_type);
4220 if (!err)
4221 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
4222 return err;
4223}
4224EXPORT_SYMBOL(dev_addr_del);
4225
4226/**
4227 * dev_addr_add_multiple - Add device addresses from another device
4228 * @to_dev: device to which addresses will be added
4229 * @from_dev: device from which addresses will be added
4230 * @addr_type: address type - 0 means type will be used from from_dev
4231 *
4232 * Add device addresses of the one device to another.
4233 **
4234 * The caller must hold the rtnl_mutex.
4235 */
4236int dev_addr_add_multiple(struct net_device *to_dev,
4237 struct net_device *from_dev,
4238 unsigned char addr_type)
4239{
4240 int err;
4241
4242 ASSERT_RTNL();
4243
4244 if (from_dev->addr_len != to_dev->addr_len)
4245 return -EINVAL;
4246 err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
4247 to_dev->addr_len, addr_type);
4248 if (!err)
4249 call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
4250 return err;
4251}
4252EXPORT_SYMBOL(dev_addr_add_multiple);
4253
4254/**
4255 * dev_addr_del_multiple - Delete device addresses by another device
4256 * @to_dev: device where the addresses will be deleted
4257 * @from_dev: device by which addresses the addresses will be deleted
4258 * @addr_type: address type - 0 means type will used from from_dev
4259 *
4260 * Deletes addresses in to device by the list of addresses in from device.
4261 *
4262 * The caller must hold the rtnl_mutex.
4263 */
4264int dev_addr_del_multiple(struct net_device *to_dev,
4265 struct net_device *from_dev,
4266 unsigned char addr_type)
4267{
4268 ASSERT_RTNL();
4269
4270 if (from_dev->addr_len != to_dev->addr_len)
4271 return -EINVAL;
4272 __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
4273 to_dev->addr_len, addr_type);
4274 call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
4275 return 0;
4276}
4277EXPORT_SYMBOL(dev_addr_del_multiple);
4278
4279/* multicast addresses handling functions */ 3971/* multicast addresses handling functions */
4280 3972
4281int __dev_addr_delete(struct dev_addr_list **list, int *count, 3973int __dev_addr_delete(struct dev_addr_list **list, int *count,
@@ -4336,57 +4028,6 @@ int __dev_addr_add(struct dev_addr_list **list, int *count,
4336 return 0; 4028 return 0;
4337} 4029}
4338 4030
4339/**
4340 * dev_unicast_delete - Release secondary unicast address.
4341 * @dev: device
4342 * @addr: address to delete
4343 *
4344 * Release reference to a secondary unicast address and remove it
4345 * from the device if the reference count drops to zero.
4346 *
4347 * The caller must hold the rtnl_mutex.
4348 */
4349int dev_unicast_delete(struct net_device *dev, void *addr)
4350{
4351 int err;
4352
4353 ASSERT_RTNL();
4354
4355 netif_addr_lock_bh(dev);
4356 err = __hw_addr_del(&dev->uc, addr, dev->addr_len,
4357 NETDEV_HW_ADDR_T_UNICAST);
4358 if (!err)
4359 __dev_set_rx_mode(dev);
4360 netif_addr_unlock_bh(dev);
4361 return err;
4362}
4363EXPORT_SYMBOL(dev_unicast_delete);
4364
4365/**
4366 * dev_unicast_add - add a secondary unicast address
4367 * @dev: device
4368 * @addr: address to add
4369 *
4370 * Add a secondary unicast address to the device or increase
4371 * the reference count if it already exists.
4372 *
4373 * The caller must hold the rtnl_mutex.
4374 */
4375int dev_unicast_add(struct net_device *dev, void *addr)
4376{
4377 int err;
4378
4379 ASSERT_RTNL();
4380
4381 netif_addr_lock_bh(dev);
4382 err = __hw_addr_add(&dev->uc, addr, dev->addr_len,
4383 NETDEV_HW_ADDR_T_UNICAST);
4384 if (!err)
4385 __dev_set_rx_mode(dev);
4386 netif_addr_unlock_bh(dev);
4387 return err;
4388}
4389EXPORT_SYMBOL(dev_unicast_add);
4390 4031
4391int __dev_addr_sync(struct dev_addr_list **to, int *to_count, 4032int __dev_addr_sync(struct dev_addr_list **to, int *to_count,
4392 struct dev_addr_list **from, int *from_count) 4033 struct dev_addr_list **from, int *from_count)
@@ -4436,71 +4077,6 @@ void __dev_addr_unsync(struct dev_addr_list **to, int *to_count,
4436} 4077}
4437EXPORT_SYMBOL_GPL(__dev_addr_unsync); 4078EXPORT_SYMBOL_GPL(__dev_addr_unsync);
4438 4079
4439/**
4440 * dev_unicast_sync - Synchronize device's unicast list to another device
4441 * @to: destination device
4442 * @from: source device
4443 *
4444 * Add newly added addresses to the destination device and release
4445 * addresses that have no users left. The source device must be
4446 * locked by netif_tx_lock_bh.
4447 *
4448 * This function is intended to be called from the dev->set_rx_mode
4449 * function of layered software devices.
4450 */
4451int dev_unicast_sync(struct net_device *to, struct net_device *from)
4452{
4453 int err = 0;
4454
4455 if (to->addr_len != from->addr_len)
4456 return -EINVAL;
4457
4458 netif_addr_lock_bh(to);
4459 err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len);
4460 if (!err)
4461 __dev_set_rx_mode(to);
4462 netif_addr_unlock_bh(to);
4463 return err;
4464}
4465EXPORT_SYMBOL(dev_unicast_sync);
4466
4467/**
4468 * dev_unicast_unsync - Remove synchronized addresses from the destination device
4469 * @to: destination device
4470 * @from: source device
4471 *
4472 * Remove all addresses that were added to the destination device by
4473 * dev_unicast_sync(). This function is intended to be called from the
4474 * dev->stop function of layered software devices.
4475 */
4476void dev_unicast_unsync(struct net_device *to, struct net_device *from)
4477{
4478 if (to->addr_len != from->addr_len)
4479 return;
4480
4481 netif_addr_lock_bh(from);
4482 netif_addr_lock(to);
4483 __hw_addr_unsync(&to->uc, &from->uc, to->addr_len);
4484 __dev_set_rx_mode(to);
4485 netif_addr_unlock(to);
4486 netif_addr_unlock_bh(from);
4487}
4488EXPORT_SYMBOL(dev_unicast_unsync);
4489
4490void dev_unicast_flush(struct net_device *dev)
4491{
4492 netif_addr_lock_bh(dev);
4493 __hw_addr_flush(&dev->uc);
4494 netif_addr_unlock_bh(dev);
4495}
4496EXPORT_SYMBOL(dev_unicast_flush);
4497
4498static void dev_unicast_init(struct net_device *dev)
4499{
4500 __hw_addr_init(&dev->uc);
4501}
4502
4503
4504static void __dev_addr_discard(struct dev_addr_list **list) 4080static void __dev_addr_discard(struct dev_addr_list **list)
4505{ 4081{
4506 struct dev_addr_list *tmp; 4082 struct dev_addr_list *tmp;
@@ -5153,7 +4729,7 @@ static void rollback_registered_many(struct list_head *head)
5153 /* 4729 /*
5154 * Flush the unicast and multicast chains 4730 * Flush the unicast and multicast chains
5155 */ 4731 */
5156 dev_unicast_flush(dev); 4732 dev_uc_flush(dev);
5157 dev_addr_discard(dev); 4733 dev_addr_discard(dev);
5158 4734
5159 if (dev->netdev_ops->ndo_uninit) 4735 if (dev->netdev_ops->ndo_uninit)
@@ -5734,7 +5310,7 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
5734 if (dev_addr_init(dev)) 5310 if (dev_addr_init(dev))
5735 goto free_rx; 5311 goto free_rx;
5736 5312
5737 dev_unicast_init(dev); 5313 dev_uc_init(dev);
5738 5314
5739 dev_net_set(dev, &init_net); 5315 dev_net_set(dev, &init_net);
5740 5316
@@ -5968,7 +5544,7 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
5968 /* 5544 /*
5969 * Flush the unicast and multicast chains 5545 * Flush the unicast and multicast chains
5970 */ 5546 */
5971 dev_unicast_flush(dev); 5547 dev_uc_flush(dev);
5972 dev_addr_discard(dev); 5548 dev_addr_discard(dev);
5973 5549
5974 netdev_unregister_kobject(dev); 5550 netdev_unregister_kobject(dev);
diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c
new file mode 100644
index 000000000000..7e52b6d18add
--- /dev/null
+++ b/net/core/dev_addr_lists.c
@@ -0,0 +1,478 @@
1/*
2 * net/core/dev_addr_lists.c - Functions for handling net device lists
3 * Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This file contains functions for working with unicast, multicast and device
6 * addresses lists.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/netdevice.h>
15#include <linux/rtnetlink.h>
16#include <linux/list.h>
17
18/*
19 * General list handling functions
20 */
21
22static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
23 int addr_len, unsigned char addr_type)
24{
25 struct netdev_hw_addr *ha;
26 int alloc_size;
27
28 if (addr_len > MAX_ADDR_LEN)
29 return -EINVAL;
30
31 list_for_each_entry(ha, &list->list, list) {
32 if (!memcmp(ha->addr, addr, addr_len) &&
33 ha->type == addr_type) {
34 ha->refcount++;
35 return 0;
36 }
37 }
38
39
40 alloc_size = sizeof(*ha);
41 if (alloc_size < L1_CACHE_BYTES)
42 alloc_size = L1_CACHE_BYTES;
43 ha = kmalloc(alloc_size, GFP_ATOMIC);
44 if (!ha)
45 return -ENOMEM;
46 memcpy(ha->addr, addr, addr_len);
47 ha->type = addr_type;
48 ha->refcount = 1;
49 ha->synced = false;
50 list_add_tail_rcu(&ha->list, &list->list);
51 list->count++;
52 return 0;
53}
54
55static void ha_rcu_free(struct rcu_head *head)
56{
57 struct netdev_hw_addr *ha;
58
59 ha = container_of(head, struct netdev_hw_addr, rcu_head);
60 kfree(ha);
61}
62
63static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr,
64 int addr_len, unsigned char addr_type)
65{
66 struct netdev_hw_addr *ha;
67
68 list_for_each_entry(ha, &list->list, list) {
69 if (!memcmp(ha->addr, addr, addr_len) &&
70 (ha->type == addr_type || !addr_type)) {
71 if (--ha->refcount)
72 return 0;
73 list_del_rcu(&ha->list);
74 call_rcu(&ha->rcu_head, ha_rcu_free);
75 list->count--;
76 return 0;
77 }
78 }
79 return -ENOENT;
80}
81
82static int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
83 struct netdev_hw_addr_list *from_list,
84 int addr_len,
85 unsigned char addr_type)
86{
87 int err;
88 struct netdev_hw_addr *ha, *ha2;
89 unsigned char type;
90
91 list_for_each_entry(ha, &from_list->list, list) {
92 type = addr_type ? addr_type : ha->type;
93 err = __hw_addr_add(to_list, ha->addr, addr_len, type);
94 if (err)
95 goto unroll;
96 }
97 return 0;
98
99unroll:
100 list_for_each_entry(ha2, &from_list->list, list) {
101 if (ha2 == ha)
102 break;
103 type = addr_type ? addr_type : ha2->type;
104 __hw_addr_del(to_list, ha2->addr, addr_len, type);
105 }
106 return err;
107}
108
109static void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
110 struct netdev_hw_addr_list *from_list,
111 int addr_len,
112 unsigned char addr_type)
113{
114 struct netdev_hw_addr *ha;
115 unsigned char type;
116
117 list_for_each_entry(ha, &from_list->list, list) {
118 type = addr_type ? addr_type : ha->type;
119 __hw_addr_del(to_list, ha->addr, addr_len, addr_type);
120 }
121}
122
123static int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
124 struct netdev_hw_addr_list *from_list,
125 int addr_len)
126{
127 int err = 0;
128 struct netdev_hw_addr *ha, *tmp;
129
130 list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
131 if (!ha->synced) {
132 err = __hw_addr_add(to_list, ha->addr,
133 addr_len, ha->type);
134 if (err)
135 break;
136 ha->synced = true;
137 ha->refcount++;
138 } else if (ha->refcount == 1) {
139 __hw_addr_del(to_list, ha->addr, addr_len, ha->type);
140 __hw_addr_del(from_list, ha->addr, addr_len, ha->type);
141 }
142 }
143 return err;
144}
145
146static void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
147 struct netdev_hw_addr_list *from_list,
148 int addr_len)
149{
150 struct netdev_hw_addr *ha, *tmp;
151
152 list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
153 if (ha->synced) {
154 __hw_addr_del(to_list, ha->addr,
155 addr_len, ha->type);
156 ha->synced = false;
157 __hw_addr_del(from_list, ha->addr,
158 addr_len, ha->type);
159 }
160 }
161}
162
163static void __hw_addr_flush(struct netdev_hw_addr_list *list)
164{
165 struct netdev_hw_addr *ha, *tmp;
166
167 list_for_each_entry_safe(ha, tmp, &list->list, list) {
168 list_del_rcu(&ha->list);
169 call_rcu(&ha->rcu_head, ha_rcu_free);
170 }
171 list->count = 0;
172}
173
174static void __hw_addr_init(struct netdev_hw_addr_list *list)
175{
176 INIT_LIST_HEAD(&list->list);
177 list->count = 0;
178}
179
180/*
181 * Device addresses handling functions
182 */
183
184/**
185 * dev_addr_flush - Flush device address list
186 * @dev: device
187 *
188 * Flush device address list and reset ->dev_addr.
189 *
190 * The caller must hold the rtnl_mutex.
191 */
192void dev_addr_flush(struct net_device *dev)
193{
194 /* rtnl_mutex must be held here */
195
196 __hw_addr_flush(&dev->dev_addrs);
197 dev->dev_addr = NULL;
198}
199EXPORT_SYMBOL(dev_addr_flush);
200
201/**
202 * dev_addr_init - Init device address list
203 * @dev: device
204 *
205 * Init device address list and create the first element,
206 * used by ->dev_addr.
207 *
208 * The caller must hold the rtnl_mutex.
209 */
210int dev_addr_init(struct net_device *dev)
211{
212 unsigned char addr[MAX_ADDR_LEN];
213 struct netdev_hw_addr *ha;
214 int err;
215
216 /* rtnl_mutex must be held here */
217
218 __hw_addr_init(&dev->dev_addrs);
219 memset(addr, 0, sizeof(addr));
220 err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr),
221 NETDEV_HW_ADDR_T_LAN);
222 if (!err) {
223 /*
224 * Get the first (previously created) address from the list
225 * and set dev_addr pointer to this location.
226 */
227 ha = list_first_entry(&dev->dev_addrs.list,
228 struct netdev_hw_addr, list);
229 dev->dev_addr = ha->addr;
230 }
231 return err;
232}
233EXPORT_SYMBOL(dev_addr_init);
234
235/**
236 * dev_addr_add - Add a device address
237 * @dev: device
238 * @addr: address to add
239 * @addr_type: address type
240 *
241 * Add a device address to the device or increase the reference count if
242 * it already exists.
243 *
244 * The caller must hold the rtnl_mutex.
245 */
246int dev_addr_add(struct net_device *dev, unsigned char *addr,
247 unsigned char addr_type)
248{
249 int err;
250
251 ASSERT_RTNL();
252
253 err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type);
254 if (!err)
255 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
256 return err;
257}
258EXPORT_SYMBOL(dev_addr_add);
259
260/**
261 * dev_addr_del - Release a device address.
262 * @dev: device
263 * @addr: address to delete
264 * @addr_type: address type
265 *
266 * Release reference to a device address and remove it from the device
267 * if the reference count drops to zero.
268 *
269 * The caller must hold the rtnl_mutex.
270 */
271int dev_addr_del(struct net_device *dev, unsigned char *addr,
272 unsigned char addr_type)
273{
274 int err;
275 struct netdev_hw_addr *ha;
276
277 ASSERT_RTNL();
278
279 /*
280 * We can not remove the first address from the list because
281 * dev->dev_addr points to that.
282 */
283 ha = list_first_entry(&dev->dev_addrs.list,
284 struct netdev_hw_addr, list);
285 if (ha->addr == dev->dev_addr && ha->refcount == 1)
286 return -ENOENT;
287
288 err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len,
289 addr_type);
290 if (!err)
291 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
292 return err;
293}
294EXPORT_SYMBOL(dev_addr_del);
295
296/**
297 * dev_addr_add_multiple - Add device addresses from another device
298 * @to_dev: device to which addresses will be added
299 * @from_dev: device from which addresses will be added
300 * @addr_type: address type - 0 means type will be used from from_dev
301 *
302 * Add device addresses of the one device to another.
303 **
304 * The caller must hold the rtnl_mutex.
305 */
306int dev_addr_add_multiple(struct net_device *to_dev,
307 struct net_device *from_dev,
308 unsigned char addr_type)
309{
310 int err;
311
312 ASSERT_RTNL();
313
314 if (from_dev->addr_len != to_dev->addr_len)
315 return -EINVAL;
316 err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
317 to_dev->addr_len, addr_type);
318 if (!err)
319 call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
320 return err;
321}
322EXPORT_SYMBOL(dev_addr_add_multiple);
323
324/**
325 * dev_addr_del_multiple - Delete device addresses by another device
326 * @to_dev: device where the addresses will be deleted
327 * @from_dev: device by which addresses the addresses will be deleted
328 * @addr_type: address type - 0 means type will used from from_dev
329 *
330 * Deletes addresses in to device by the list of addresses in from device.
331 *
332 * The caller must hold the rtnl_mutex.
333 */
334int dev_addr_del_multiple(struct net_device *to_dev,
335 struct net_device *from_dev,
336 unsigned char addr_type)
337{
338 ASSERT_RTNL();
339
340 if (from_dev->addr_len != to_dev->addr_len)
341 return -EINVAL;
342 __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
343 to_dev->addr_len, addr_type);
344 call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
345 return 0;
346}
347EXPORT_SYMBOL(dev_addr_del_multiple);
348
349/*
350 * Unicast list handling functions
351 */
352
353/**
354 * dev_uc_add - Add a secondary unicast address
355 * @dev: device
356 * @addr: address to add
357 *
358 * Add a secondary unicast address to the device or increase
359 * the reference count if it already exists.
360 */
361int dev_uc_add(struct net_device *dev, unsigned char *addr)
362{
363 int err;
364
365 netif_addr_lock_bh(dev);
366 err = __hw_addr_add(&dev->uc, addr, dev->addr_len,
367 NETDEV_HW_ADDR_T_UNICAST);
368 if (!err)
369 __dev_set_rx_mode(dev);
370 netif_addr_unlock_bh(dev);
371 return err;
372}
373EXPORT_SYMBOL(dev_uc_add);
374
375/**
376 * dev_uc_del - Release secondary unicast address.
377 * @dev: device
378 * @addr: address to delete
379 *
380 * Release reference to a secondary unicast address and remove it
381 * from the device if the reference count drops to zero.
382 */
383int dev_uc_del(struct net_device *dev, unsigned char *addr)
384{
385 int err;
386
387 netif_addr_lock_bh(dev);
388 err = __hw_addr_del(&dev->uc, addr, dev->addr_len,
389 NETDEV_HW_ADDR_T_UNICAST);
390 if (!err)
391 __dev_set_rx_mode(dev);
392 netif_addr_unlock_bh(dev);
393 return err;
394}
395EXPORT_SYMBOL(dev_uc_del);
396
397/**
398 * dev_uc_sync - Synchronize device's unicast list to another device
399 * @to: destination device
400 * @from: source device
401 *
402 * Add newly added addresses to the destination device and release
403 * addresses that have no users left. The source device must be
404 * locked by netif_tx_lock_bh.
405 *
406 * This function is intended to be called from the dev->set_rx_mode
407 * function of layered software devices.
408 */
409int dev_uc_sync(struct net_device *to, struct net_device *from)
410{
411 int err = 0;
412
413 if (to->addr_len != from->addr_len)
414 return -EINVAL;
415
416 netif_addr_lock_bh(to);
417 err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len);
418 if (!err)
419 __dev_set_rx_mode(to);
420 netif_addr_unlock_bh(to);
421 return err;
422}
423EXPORT_SYMBOL(dev_uc_sync);
424
425/**
426 * dev_uc_unsync - Remove synchronized addresses from the destination device
427 * @to: destination device
428 * @from: source device
429 *
430 * Remove all addresses that were added to the destination device by
431 * dev_uc_sync(). This function is intended to be called from the
432 * dev->stop function of layered software devices.
433 */
434void dev_uc_unsync(struct net_device *to, struct net_device *from)
435{
436 if (to->addr_len != from->addr_len)
437 return;
438
439 netif_addr_lock_bh(from);
440 netif_addr_lock(to);
441 __hw_addr_unsync(&to->uc, &from->uc, to->addr_len);
442 __dev_set_rx_mode(to);
443 netif_addr_unlock(to);
444 netif_addr_unlock_bh(from);
445}
446EXPORT_SYMBOL(dev_uc_unsync);
447
448/**
449 * dev_uc_flush - Flush unicast addresses
450 * @dev: device
451 *
452 * Flush unicast addresses.
453 */
454void dev_uc_flush(struct net_device *dev)
455{
456 netif_addr_lock_bh(dev);
457 __hw_addr_flush(&dev->uc);
458 netif_addr_unlock_bh(dev);
459}
460EXPORT_SYMBOL(dev_uc_flush);
461
462/**
463 * dev_uc_flush - Init unicast address list
464 * @dev: device
465 *
466 * Init unicast address list.
467 */
468void dev_uc_init(struct net_device *dev)
469{
470 __hw_addr_init(&dev->uc);
471}
472EXPORT_SYMBOL(dev_uc_init);
473
474/*
475 * Multicast list handling functions
476 */
477
478/* To be filled here */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 09:26:54 -0500