/* Announce (supervision frame) timer function
*/
static void hsr_announce(unsigned long data)
{
struct hsr_priv *hsr;
struct hsr_port *master;
hsr = (struct hsr_priv *) data;
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
if (hsr->announce_count < 3 && hsr->protVersion == 0) {
send_hsr_supervision_frame(master, HSR_TLV_ANNOUNCE,
hsr->protVersion);
hsr->announce_count++;
hsr->announce_timer.expires = jiffies +
msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
} else {
send_hsr_supervision_frame(master, HSR_TLV_LIFE_CHECK,
hsr->protVersion);
hsr->announce_timer.expires = jiffies +
msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
}
if (is_admin_up(master->dev))
add_timer(&hsr->announce_timer);
rcu_read_unlock();
}
void hsr_del_port(struct hsr_port *port)
{
struct hsr_priv *hsr;
struct hsr_port *master;
hsr = port->hsr;
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
list_del_rcu(&port->port_list);
if (port != master) {
if (master != NULL) {
netdev_update_features(master->dev);
dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
}
netdev_rx_handler_unregister(port->dev);
dev_set_promiscuity(port->dev, -1);
}
/* FIXME?
* netdev_upper_dev_unlink(port->dev, port->hsr->dev);
*/
synchronize_rcu();
if (port != master)
dev_put(port->dev);
}
/* 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, unsigned char addr[ETH_ALEN])
{
struct sk_buff *skb;
void *msg_head;
struct hsr_port *master;
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(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
return;
nla_put_failure:
kfree_skb(skb);
fail:
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
netdev_warn(master->dev, "Could not send HSR node down\n");
rcu_read_unlock();
}
int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev,
enum hsr_port_type type)
{
struct hsr_port *port, *master;
int res;
if (type != HSR_PT_MASTER) {
res = hsr_check_dev_ok(dev);
if (res)
return res;
}
port = hsr_port_get_hsr(hsr, type);
if (port != NULL)
return -EBUSY; /* This port already exists */
port = kzalloc(sizeof(*port), GFP_KERNEL);
if (port == NULL)
return -ENOMEM;
if (type != HSR_PT_MASTER) {
res = hsr_portdev_setup(dev, port);
if (res)
goto fail_dev_setup;
}
port->hsr = hsr;
port->dev = dev;
port->type = type;
list_add_tail_rcu(&port->port_list, &hsr->ports);
synchronize_rcu();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
netdev_update_features(master->dev);
dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
return 0;
fail_dev_setup:
kfree(port);
return res;
}
static int hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct hsr_priv *hsr = netdev_priv(dev);
struct hsr_port *master;
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
skb->dev = master->dev;
hsr_forward_skb(skb, master);
return NETDEV_TX_OK;
}
void hsr_check_carrier_and_operstate(struct hsr_priv *hsr)
{
struct hsr_port *master;
unsigned char old_operstate;
bool has_carrier;
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
/* netif_stacked_transfer_operstate() cannot be used here since
* it doesn't set IF_OPER_LOWERLAYERDOWN (?)
*/
old_operstate = master->dev->operstate;
has_carrier = hsr_check_carrier(master);
hsr_set_operstate(master, has_carrier);
hsr_check_announce(master->dev, old_operstate);
}
static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct hsr_priv *hsr;
struct hsr_port *port;
int res;
hsr = netdev_priv(dev);
res = 0;
rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
if (port)
res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex);
rcu_read_unlock();
if (res)
goto nla_put_failure;
rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
if (port)
res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex);
rcu_read_unlock();
if (res)
goto nla_put_failure;
if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
hsr->sup_multicast_addr) ||
nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu)
{
struct hsr_priv *hsr;
struct hsr_port *master;
hsr = netdev_priv(dev);
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
if (new_mtu > hsr_get_max_mtu(hsr)) {
netdev_info(master->dev, "A HSR master's MTU cannot be greater than the smallest MTU of its slaves minus the HSR Tag length (%d octets).\n",
HSR_HLEN);
return -EINVAL;
}
dev->mtu = new_mtu;
return 0;
}
/* 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, unsigned char addr[ETH_ALEN],
struct hsr_port *port)
{
struct sk_buff *skb;
void *msg_head;
struct hsr_port *master;
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_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;
res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex);
if (res < 0)
goto nla_put_failure;
genlmsg_end(skb, msg_head);
genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
return;
nla_put_failure:
kfree_skb(skb);
fail:
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
netdev_warn(master->dev, "Could not send HSR ring error message\n");
rcu_read_unlock();
}
/* 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;
struct hsr_port *port;
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 = netdev_priv(hsr_dev);
res = hsr_get_node_data(hsr,
(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 nla_put_failure;
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;
rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
if (port)
res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
port->dev->ifindex);
rcu_read_unlock();
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;
rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
if (port)
res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
port->dev->ifindex);
rcu_read_unlock();
if (res < 0)
goto nla_put_failure;
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;
}