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net/hsr: Better variable names and update of contact info.

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Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arvid Brodin
2014-07-04 23:34:38 +02:00
committed by David S. Miller
parent b8125404c2
commit 70ebe4a471
8 changed files with 304 additions and 305 deletions
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170
net/hsr/hsr_main.c
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@@ -1,4 +1,4 @@
/* Copyright 2011-2013 Autronica Fire and Security AS
/* Copyright 2011-2014 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
@@ -6,7 +6,7 @@
* any later version.
*
* Author(s):
* 2011-2013 Arvid Brodin, arvid.brodin@xdin.com
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
*
* In addition to routines for registering and unregistering HSR support, this
* file also contains the receive routine that handles all incoming frames with
@@ -26,30 +26,30 @@
/* List of all registered virtual HSR devices */
static LIST_HEAD(hsr_list);
void register_hsr_master(struct hsr_priv *hsr_priv)
void register_hsr_master(struct hsr_priv *hsr)
{
list_add_tail_rcu(&hsr_priv->hsr_list, &hsr_list);
list_add_tail_rcu(&hsr->hsr_list, &hsr_list);
}
void unregister_hsr_master(struct hsr_priv *hsr_priv)
void unregister_hsr_master(struct hsr_priv *hsr)
{
struct hsr_priv *hsr_priv_it;
struct hsr_priv *hsr_it;
list_for_each_entry(hsr_priv_it, &hsr_list, hsr_list)
if (hsr_priv_it == hsr_priv) {
list_del_rcu(&hsr_priv_it->hsr_list);
list_for_each_entry(hsr_it, &hsr_list, hsr_list)
if (hsr_it == hsr) {
list_del_rcu(&hsr_it->hsr_list);
return;
}
}
bool is_hsr_slave(struct net_device *dev)
{
struct hsr_priv *hsr_priv_it;
struct hsr_priv *hsr_it;
list_for_each_entry_rcu(hsr_priv_it, &hsr_list, hsr_list) {
if (dev == hsr_priv_it->slave[0])
list_for_each_entry_rcu(hsr_it, &hsr_list, hsr_list) {
if (dev == hsr_it->slave[0])
return true;
if (dev == hsr_priv_it->slave[1])
if (dev == hsr_it->slave[1])
return true;
}
@@ -62,14 +62,14 @@ bool is_hsr_slave(struct net_device *dev)
*/
static struct hsr_priv *get_hsr_master(struct net_device *dev)
{
struct hsr_priv *hsr_priv;
struct hsr_priv *hsr;
rcu_read_lock();
list_for_each_entry_rcu(hsr_priv, &hsr_list, hsr_list)
if ((dev == hsr_priv->slave[0]) ||
(dev == hsr_priv->slave[1])) {
list_for_each_entry_rcu(hsr, &hsr_list, hsr_list)
if ((dev == hsr->slave[0]) ||
(dev == hsr->slave[1])) {
rcu_read_unlock();
return hsr_priv;
return hsr;
}
rcu_read_unlock();
@@ -80,13 +80,13 @@ static struct hsr_priv *get_hsr_master(struct net_device *dev)
/* If dev is a HSR slave device, return the other slave device. Return NULL
* otherwise.
*/
static struct net_device *get_other_slave(struct hsr_priv *hsr_priv,
static struct net_device *get_other_slave(struct hsr_priv *hsr,
struct net_device *dev)
{
if (dev == hsr_priv->slave[0])
return hsr_priv->slave[1];
if (dev == hsr_priv->slave[1])
return hsr_priv->slave[0];
if (dev == hsr->slave[0])
return hsr->slave[1];
if (dev == hsr->slave[1])
return hsr->slave[0];
return NULL;
}
@@ -96,7 +96,7 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
void *ptr)
{
struct net_device *slave, *other_slave;
struct hsr_priv *hsr_priv;
struct hsr_priv *hsr;
int old_operstate;
int mtu_max;
int res;
@@ -104,68 +104,68 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
dev = netdev_notifier_info_to_dev(ptr);
hsr_priv = get_hsr_master(dev);
if (hsr_priv) {
hsr = get_hsr_master(dev);
if (hsr) {
/* dev is a slave device */
slave = dev;
other_slave = get_other_slave(hsr_priv, slave);
other_slave = get_other_slave(hsr, slave);
} else {
if (!is_hsr_master(dev))
return NOTIFY_DONE;
hsr_priv = netdev_priv(dev);
slave = hsr_priv->slave[0];
other_slave = hsr_priv->slave[1];
hsr = netdev_priv(dev);
slave = hsr->slave[0];
other_slave = hsr->slave[1];
}
switch (event) {
case NETDEV_UP: /* Administrative state DOWN */
case NETDEV_DOWN: /* Administrative state UP */
case NETDEV_CHANGE: /* Link (carrier) state changes */
old_operstate = hsr_priv->dev->operstate;
hsr_set_carrier(hsr_priv->dev, slave, other_slave);
old_operstate = hsr->dev->operstate;
hsr_set_carrier(hsr->dev, slave, other_slave);
/* netif_stacked_transfer_operstate() cannot be used here since
* it doesn't set IF_OPER_LOWERLAYERDOWN (?)
*/
hsr_set_operstate(hsr_priv->dev, slave, other_slave);
hsr_check_announce(hsr_priv->dev, old_operstate);
hsr_set_operstate(hsr->dev, slave, other_slave);
hsr_check_announce(hsr->dev, old_operstate);
break;
case NETDEV_CHANGEADDR:
/* This should not happen since there's no ndo_set_mac_address()
* for HSR devices - i.e. not supported.
*/
if (dev == hsr_priv->dev)
if (dev == hsr->dev)
break;
if (dev == hsr_priv->slave[0])
ether_addr_copy(hsr_priv->dev->dev_addr,
hsr_priv->slave[0]->dev_addr);
if (dev == hsr->slave[0])
ether_addr_copy(hsr->dev->dev_addr,
hsr->slave[0]->dev_addr);
/* Make sure we recognize frames from ourselves in hsr_rcv() */
res = hsr_create_self_node(&hsr_priv->self_node_db,
hsr_priv->dev->dev_addr,
hsr_priv->slave[1] ?
hsr_priv->slave[1]->dev_addr :
hsr_priv->dev->dev_addr);
res = hsr_create_self_node(&hsr->self_node_db,
hsr->dev->dev_addr,
hsr->slave[1] ?
hsr->slave[1]->dev_addr :
hsr->dev->dev_addr);
if (res)
netdev_warn(hsr_priv->dev,
netdev_warn(hsr->dev,
"Could not update HSR node address.\n");
if (dev == hsr_priv->slave[0])
call_netdevice_notifiers(NETDEV_CHANGEADDR, hsr_priv->dev);
if (dev == hsr->slave[0])
call_netdevice_notifiers(NETDEV_CHANGEADDR, hsr->dev);
break;
case NETDEV_CHANGEMTU:
if (dev == hsr_priv->dev)
if (dev == hsr->dev)
break; /* Handled in ndo_change_mtu() */
mtu_max = hsr_get_max_mtu(hsr_priv);
if (hsr_priv->dev->mtu > mtu_max)
dev_set_mtu(hsr_priv->dev, mtu_max);
mtu_max = hsr_get_max_mtu(hsr);
if (hsr->dev->mtu > mtu_max)
dev_set_mtu(hsr->dev, mtu_max);
break;
case NETDEV_UNREGISTER:
if (dev == hsr_priv->slave[0])
hsr_priv->slave[0] = NULL;
if (dev == hsr_priv->slave[1])
hsr_priv->slave[1] = NULL;
if (dev == hsr->slave[0])
hsr->slave[0] = NULL;
if (dev == hsr->slave[1])
hsr->slave[1] = NULL;
/* There should really be a way to set a new slave device... */
@@ -185,11 +185,11 @@ static struct timer_list prune_timer;
static void prune_nodes_all(unsigned long data)
{
struct hsr_priv *hsr_priv;
struct hsr_priv *hsr;
rcu_read_lock();
list_for_each_entry_rcu(hsr_priv, &hsr_list, hsr_list)
hsr_prune_nodes(hsr_priv);
list_for_each_entry_rcu(hsr, &hsr_list, hsr_list)
hsr_prune_nodes(hsr);
rcu_read_unlock();
prune_timer.expires = jiffies + msecs_to_jiffies(PRUNE_PERIOD);
@@ -207,12 +207,12 @@ static struct sk_buff *hsr_pull_tag(struct sk_buff *skb)
goto err_free;
skb = skb2;
if (unlikely(!pskb_may_pull(skb, HSR_TAGLEN)))
if (unlikely(!pskb_may_pull(skb, HSR_HLEN)))
goto err_free;
hsr_tag = (struct hsr_tag *) skb->data;
skb->protocol = hsr_tag->encap_proto;
skb_pull(skb, HSR_TAGLEN);
skb_pull(skb, HSR_HLEN);
return skb;
@@ -237,12 +237,12 @@ err_free:
* 3) Allow different MAC addresses for the two slave interfaces, using the
* MacAddressA field.
*/
static bool is_supervision_frame(struct hsr_priv *hsr_priv, struct sk_buff *skb)
static bool is_supervision_frame(struct hsr_priv *hsr, struct sk_buff *skb)
{
struct hsr_sup_tag *hsr_stag;
if (!ether_addr_equal(eth_hdr(skb)->h_dest,
hsr_priv->sup_multicast_addr))
hsr->sup_multicast_addr))
return false;
hsr_stag = (struct hsr_sup_tag *) skb->data;
@@ -263,25 +263,25 @@ static bool is_supervision_frame(struct hsr_priv *hsr_priv, struct sk_buff *skb)
static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
{
struct hsr_priv *hsr_priv;
struct hsr_priv *hsr;
struct net_device *other_slave;
struct node_entry *node;
struct hsr_node *node;
bool deliver_to_self;
struct sk_buff *skb_deliver;
enum hsr_dev_idx dev_in_idx, dev_other_idx;
bool dup_out;
int ret;
hsr_priv = get_hsr_master(dev);
hsr = get_hsr_master(dev);
if (!hsr_priv) {
if (!hsr) {
/* Non-HSR-slave device 'dev' is connected to a HSR network */
kfree_skb(skb);
dev->stats.rx_errors++;
return NET_RX_SUCCESS;
}
if (dev == hsr_priv->slave[0]) {
if (dev == hsr->slave[0]) {
dev_in_idx = HSR_DEV_SLAVE_A;
dev_other_idx = HSR_DEV_SLAVE_B;
} else {
@@ -289,7 +289,7 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
dev_other_idx = HSR_DEV_SLAVE_A;
}
node = hsr_find_node(&hsr_priv->self_node_db, skb);
node = hsr_find_node(&hsr->self_node_db, skb);
if (node) {
/* Always kill frames sent by ourselves */
kfree_skb(skb);
@@ -303,22 +303,22 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
(skb->pkt_type == PACKET_BROADCAST))
deliver_to_self = true;
else if (ether_addr_equal(eth_hdr(skb)->h_dest,
hsr_priv->dev->dev_addr)) {
hsr->dev->dev_addr)) {
skb->pkt_type = PACKET_HOST;
deliver_to_self = true;
}
rcu_read_lock(); /* node_db */
node = hsr_find_node(&hsr_priv->node_db, skb);
node = hsr_find_node(&hsr->node_db, skb);
if (is_supervision_frame(hsr_priv, skb)) {
if (is_supervision_frame(hsr, skb)) {
skb_pull(skb, sizeof(struct hsr_sup_tag));
node = hsr_merge_node(hsr_priv, node, skb, dev_in_idx);
node = hsr_merge_node(hsr, node, skb, dev_in_idx);
if (!node) {
rcu_read_unlock(); /* node_db */
kfree_skb(skb);
hsr_priv->dev->stats.rx_dropped++;
hsr->dev->stats.rx_dropped++;
return NET_RX_DROP;
}
skb_push(skb, sizeof(struct hsr_sup_tag));
@@ -345,7 +345,7 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
/* Forward this frame? */
if (!dup_out && (skb->pkt_type != PACKET_HOST))
other_slave = get_other_slave(hsr_priv, dev);
other_slave = get_other_slave(hsr, dev);
else
other_slave = NULL;
@@ -368,7 +368,7 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
skb_deliver = pskb_copy(skb, GFP_ATOMIC);
if (!skb_deliver) {
deliver_to_self = false;
hsr_priv->dev->stats.rx_dropped++;
hsr->dev->stats.rx_dropped++;
}
}
@@ -377,7 +377,7 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
skb_deliver = hsr_pull_tag(skb_deliver);
if (!skb_deliver) {
hsr_priv->dev->stats.rx_dropped++;
hsr->dev->stats.rx_dropped++;
goto forward;
}
#if !defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
@@ -386,7 +386,7 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
* tag. In practice, this removes/overwrites the HSR tag in
* the header and restores a "standard" packet.
*/
memmove(skb_deliver->data - HSR_TAGLEN, skb_deliver->data,
memmove(skb_deliver->data - HSR_HLEN, skb_deliver->data,
skb_headlen(skb_deliver));
/* Adjust skb members so they correspond with the move above.
@@ -397,20 +397,20 @@ static int hsr_rcv(struct sk_buff *skb, struct net_device *dev,
* the mac header nor the head. So we only need to adjust data
* and tail:
*/
skb_deliver->data -= HSR_TAGLEN;
skb_deliver->tail -= HSR_TAGLEN;
skb_deliver->data -= HSR_HLEN;
skb_deliver->tail -= HSR_HLEN;
#endif
skb_deliver->dev = hsr_priv->dev;
hsr_addr_subst_source(hsr_priv, skb_deliver);
skb_deliver->dev = hsr->dev;
hsr_addr_subst_source(hsr, skb_deliver);
multicast_frame = (skb_deliver->pkt_type == PACKET_MULTICAST);
ret = netif_rx(skb_deliver);
if (ret == NET_RX_DROP) {
hsr_priv->dev->stats.rx_dropped++;
hsr->dev->stats.rx_dropped++;
} else {
hsr_priv->dev->stats.rx_packets++;
hsr_priv->dev->stats.rx_bytes += skb->len;
hsr->dev->stats.rx_packets++;
hsr->dev->stats.rx_bytes += skb->len;
if (multicast_frame)
hsr_priv->dev->stats.multicast++;
hsr->dev->stats.multicast++;
}
}
@@ -439,7 +439,7 @@ static int __init hsr_init(void)
{
int res;
BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_TAGLEN);
BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
dev_add_pack(&hsr_pt);