458 строки
11 KiB
C
458 строки
11 KiB
C
/* Copyright 2011-2013 Autronica Fire and Security AS
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* Author(s):
|
|
* 2011-2013 Arvid Brodin, arvid.brodin@xdin.com
|
|
*
|
|
* Routines for handling Netlink messages for HSR.
|
|
*/
|
|
|
|
#include "hsr_netlink.h"
|
|
#include <linux/kernel.h>
|
|
#include <net/rtnetlink.h>
|
|
#include <net/genetlink.h>
|
|
#include "hsr_main.h"
|
|
#include "hsr_device.h"
|
|
#include "hsr_framereg.h"
|
|
|
|
static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = {
|
|
[IFLA_HSR_SLAVE1] = { .type = NLA_U32 },
|
|
[IFLA_HSR_SLAVE2] = { .type = NLA_U32 },
|
|
[IFLA_HSR_MULTICAST_SPEC] = { .type = NLA_U8 },
|
|
};
|
|
|
|
|
|
/* Here, it seems a netdevice has already been allocated for us, and the
|
|
* hsr_dev_setup routine has been executed. Nice!
|
|
*/
|
|
static int hsr_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
struct net_device *link[2];
|
|
unsigned char multicast_spec;
|
|
|
|
if (!data[IFLA_HSR_SLAVE1]) {
|
|
netdev_info(dev, "IFLA_HSR_SLAVE1 missing!\n");
|
|
return -EINVAL;
|
|
}
|
|
link[0] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE1]));
|
|
if (!data[IFLA_HSR_SLAVE2]) {
|
|
netdev_info(dev, "IFLA_HSR_SLAVE2 missing!\n");
|
|
return -EINVAL;
|
|
}
|
|
link[1] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE2]));
|
|
|
|
if (!link[0] || !link[1])
|
|
return -ENODEV;
|
|
if (link[0] == link[1])
|
|
return -EINVAL;
|
|
|
|
if (!data[IFLA_HSR_MULTICAST_SPEC])
|
|
multicast_spec = 0;
|
|
else
|
|
multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]);
|
|
|
|
return hsr_dev_finalize(dev, link, multicast_spec);
|
|
}
|
|
|
|
static struct rtnl_link_ops hsr_link_ops __read_mostly = {
|
|
.kind = "hsr",
|
|
.maxtype = IFLA_HSR_MAX,
|
|
.policy = hsr_policy,
|
|
.priv_size = sizeof(struct hsr_priv),
|
|
.setup = hsr_dev_setup,
|
|
.newlink = hsr_newlink,
|
|
};
|
|
|
|
|
|
|
|
/* attribute policy */
|
|
/* NLA_BINARY missing in libnl; use NLA_UNSPEC in userspace instead. */
|
|
static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
|
|
[HSR_A_NODE_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN },
|
|
[HSR_A_NODE_ADDR_B] = { .type = NLA_BINARY, .len = ETH_ALEN },
|
|
[HSR_A_IFINDEX] = { .type = NLA_U32 },
|
|
[HSR_A_IF1_AGE] = { .type = NLA_U32 },
|
|
[HSR_A_IF2_AGE] = { .type = NLA_U32 },
|
|
[HSR_A_IF1_SEQ] = { .type = NLA_U16 },
|
|
[HSR_A_IF2_SEQ] = { .type = NLA_U16 },
|
|
};
|
|
|
|
static struct genl_family hsr_genl_family = {
|
|
.id = GENL_ID_GENERATE,
|
|
.hdrsize = 0,
|
|
.name = "HSR",
|
|
.version = 1,
|
|
.maxattr = HSR_A_MAX,
|
|
};
|
|
|
|
static struct genl_multicast_group hsr_network_genl_mcgrp = {
|
|
.name = "hsr-network",
|
|
};
|
|
|
|
|
|
|
|
/* This is called if for some node with MAC address addr, we only get frames
|
|
* over one of the slave interfaces. This would indicate an open network ring
|
|
* (i.e. a link has failed somewhere).
|
|
*/
|
|
void hsr_nl_ringerror(struct hsr_priv *hsr_priv, unsigned char addr[ETH_ALEN],
|
|
enum hsr_dev_idx dev_idx)
|
|
{
|
|
struct sk_buff *skb;
|
|
void *msg_head;
|
|
int res;
|
|
int ifindex;
|
|
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
|
|
if (!skb)
|
|
goto fail;
|
|
|
|
msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR);
|
|
if (!msg_head)
|
|
goto nla_put_failure;
|
|
|
|
res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
if (hsr_priv->slave[dev_idx])
|
|
ifindex = hsr_priv->slave[dev_idx]->ifindex;
|
|
else
|
|
ifindex = -1;
|
|
res = nla_put_u32(skb, HSR_A_IFINDEX, ifindex);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
genlmsg_end(skb, msg_head);
|
|
genlmsg_multicast(skb, 0, hsr_network_genl_mcgrp.id, GFP_ATOMIC);
|
|
|
|
return;
|
|
|
|
nla_put_failure:
|
|
kfree_skb(skb);
|
|
|
|
fail:
|
|
netdev_warn(hsr_priv->dev, "Could not send HSR ring error message\n");
|
|
}
|
|
|
|
/* This is called when we haven't heard from the node with MAC address addr for
|
|
* some time (just before the node is removed from the node table/list).
|
|
*/
|
|
void hsr_nl_nodedown(struct hsr_priv *hsr_priv, unsigned char addr[ETH_ALEN])
|
|
{
|
|
struct sk_buff *skb;
|
|
void *msg_head;
|
|
int res;
|
|
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
|
|
if (!skb)
|
|
goto fail;
|
|
|
|
msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN);
|
|
if (!msg_head)
|
|
goto nla_put_failure;
|
|
|
|
|
|
res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
genlmsg_end(skb, msg_head);
|
|
genlmsg_multicast(skb, 0, hsr_network_genl_mcgrp.id, GFP_ATOMIC);
|
|
|
|
return;
|
|
|
|
nla_put_failure:
|
|
kfree_skb(skb);
|
|
|
|
fail:
|
|
netdev_warn(hsr_priv->dev, "Could not send HSR node down\n");
|
|
}
|
|
|
|
|
|
/* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table
|
|
* about the status of a specific node in the network, defined by its MAC
|
|
* address.
|
|
*
|
|
* Input: hsr ifindex, node mac address
|
|
* Output: hsr ifindex, node mac address (copied from request),
|
|
* age of latest frame from node over slave 1, slave 2 [ms]
|
|
*/
|
|
static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
|
|
{
|
|
/* For receiving */
|
|
struct nlattr *na;
|
|
struct net_device *hsr_dev;
|
|
|
|
/* For sending */
|
|
struct sk_buff *skb_out;
|
|
void *msg_head;
|
|
struct hsr_priv *hsr_priv;
|
|
unsigned char hsr_node_addr_b[ETH_ALEN];
|
|
int hsr_node_if1_age;
|
|
u16 hsr_node_if1_seq;
|
|
int hsr_node_if2_age;
|
|
u16 hsr_node_if2_seq;
|
|
int addr_b_ifindex;
|
|
int res;
|
|
|
|
if (!info)
|
|
goto invalid;
|
|
|
|
na = info->attrs[HSR_A_IFINDEX];
|
|
if (!na)
|
|
goto invalid;
|
|
na = info->attrs[HSR_A_NODE_ADDR];
|
|
if (!na)
|
|
goto invalid;
|
|
|
|
hsr_dev = __dev_get_by_index(genl_info_net(info),
|
|
nla_get_u32(info->attrs[HSR_A_IFINDEX]));
|
|
if (!hsr_dev)
|
|
goto invalid;
|
|
if (!is_hsr_master(hsr_dev))
|
|
goto invalid;
|
|
|
|
|
|
/* Send reply */
|
|
|
|
skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb_out) {
|
|
res = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
|
|
info->snd_seq, &hsr_genl_family, 0,
|
|
HSR_C_SET_NODE_STATUS);
|
|
if (!msg_head) {
|
|
res = -ENOMEM;
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
hsr_priv = netdev_priv(hsr_dev);
|
|
res = hsr_get_node_data(hsr_priv,
|
|
(unsigned char *) nla_data(info->attrs[HSR_A_NODE_ADDR]),
|
|
hsr_node_addr_b,
|
|
&addr_b_ifindex,
|
|
&hsr_node_if1_age,
|
|
&hsr_node_if1_seq,
|
|
&hsr_node_if2_age,
|
|
&hsr_node_if2_seq);
|
|
if (res < 0)
|
|
goto fail;
|
|
|
|
res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN,
|
|
nla_data(info->attrs[HSR_A_NODE_ADDR]));
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
if (addr_b_ifindex > -1) {
|
|
res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN,
|
|
hsr_node_addr_b);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, addr_b_ifindex);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
if (hsr_priv->slave[0])
|
|
res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
|
|
hsr_priv->slave[0]->ifindex);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
if (hsr_priv->slave[1])
|
|
res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
|
|
hsr_priv->slave[1]->ifindex);
|
|
|
|
genlmsg_end(skb_out, msg_head);
|
|
genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
|
|
|
|
return 0;
|
|
|
|
invalid:
|
|
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
kfree_skb(skb_out);
|
|
/* Fall through */
|
|
|
|
fail:
|
|
return res;
|
|
}
|
|
|
|
static struct genl_ops hsr_ops_get_node_status = {
|
|
.cmd = HSR_C_GET_NODE_STATUS,
|
|
.flags = 0,
|
|
.policy = hsr_genl_policy,
|
|
.doit = hsr_get_node_status,
|
|
.dumpit = NULL,
|
|
};
|
|
|
|
|
|
/* Get a list of MacAddressA of all nodes known to this node (other than self).
|
|
*/
|
|
static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
|
|
{
|
|
/* For receiving */
|
|
struct nlattr *na;
|
|
struct net_device *hsr_dev;
|
|
|
|
/* For sending */
|
|
struct sk_buff *skb_out;
|
|
void *msg_head;
|
|
struct hsr_priv *hsr_priv;
|
|
void *pos;
|
|
unsigned char addr[ETH_ALEN];
|
|
int res;
|
|
|
|
if (!info)
|
|
goto invalid;
|
|
|
|
na = info->attrs[HSR_A_IFINDEX];
|
|
if (!na)
|
|
goto invalid;
|
|
|
|
hsr_dev = __dev_get_by_index(genl_info_net(info),
|
|
nla_get_u32(info->attrs[HSR_A_IFINDEX]));
|
|
if (!hsr_dev)
|
|
goto invalid;
|
|
if (!is_hsr_master(hsr_dev))
|
|
goto invalid;
|
|
|
|
|
|
/* Send reply */
|
|
|
|
skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb_out) {
|
|
res = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
|
|
info->snd_seq, &hsr_genl_family, 0,
|
|
HSR_C_SET_NODE_LIST);
|
|
if (!msg_head) {
|
|
res = -ENOMEM;
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
|
|
if (res < 0)
|
|
goto nla_put_failure;
|
|
|
|
hsr_priv = netdev_priv(hsr_dev);
|
|
|
|
rcu_read_lock();
|
|
pos = hsr_get_next_node(hsr_priv, NULL, addr);
|
|
while (pos) {
|
|
res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr);
|
|
if (res < 0) {
|
|
rcu_read_unlock();
|
|
goto nla_put_failure;
|
|
}
|
|
pos = hsr_get_next_node(hsr_priv, pos, addr);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
genlmsg_end(skb_out, msg_head);
|
|
genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
|
|
|
|
return 0;
|
|
|
|
invalid:
|
|
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
kfree_skb(skb_out);
|
|
/* Fall through */
|
|
|
|
fail:
|
|
return res;
|
|
}
|
|
|
|
|
|
static struct genl_ops hsr_ops_get_node_list = {
|
|
.cmd = HSR_C_GET_NODE_LIST,
|
|
.flags = 0,
|
|
.policy = hsr_genl_policy,
|
|
.doit = hsr_get_node_list,
|
|
.dumpit = NULL,
|
|
};
|
|
|
|
int __init hsr_netlink_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = rtnl_link_register(&hsr_link_ops);
|
|
if (rc)
|
|
goto fail_rtnl_link_register;
|
|
|
|
rc = genl_register_family(&hsr_genl_family);
|
|
if (rc)
|
|
goto fail_genl_register_family;
|
|
|
|
rc = genl_register_ops(&hsr_genl_family, &hsr_ops_get_node_status);
|
|
if (rc)
|
|
goto fail_genl_register_ops;
|
|
|
|
rc = genl_register_ops(&hsr_genl_family, &hsr_ops_get_node_list);
|
|
if (rc)
|
|
goto fail_genl_register_ops_node_list;
|
|
|
|
rc = genl_register_mc_group(&hsr_genl_family, &hsr_network_genl_mcgrp);
|
|
if (rc)
|
|
goto fail_genl_register_mc_group;
|
|
|
|
return 0;
|
|
|
|
fail_genl_register_mc_group:
|
|
genl_unregister_ops(&hsr_genl_family, &hsr_ops_get_node_list);
|
|
fail_genl_register_ops_node_list:
|
|
genl_unregister_ops(&hsr_genl_family, &hsr_ops_get_node_status);
|
|
fail_genl_register_ops:
|
|
genl_unregister_family(&hsr_genl_family);
|
|
fail_genl_register_family:
|
|
rtnl_link_unregister(&hsr_link_ops);
|
|
fail_rtnl_link_register:
|
|
|
|
return rc;
|
|
}
|
|
|
|
void __exit hsr_netlink_exit(void)
|
|
{
|
|
genl_unregister_mc_group(&hsr_genl_family, &hsr_network_genl_mcgrp);
|
|
genl_unregister_ops(&hsr_genl_family, &hsr_ops_get_node_status);
|
|
genl_unregister_family(&hsr_genl_family);
|
|
|
|
rtnl_link_unregister(&hsr_link_ops);
|
|
}
|
|
|
|
MODULE_ALIAS_RTNL_LINK("hsr");
|