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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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108
net/hsr/hsr_framereg.c
View File

@@ -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
*
* The HSR spec says never to forward the same frame twice on the same
* interface. A frame is identified by its source MAC address and its HSR
@@ -23,17 +23,17 @@
#include "hsr_netlink.h"
struct node_entry {
struct list_head mac_list;
unsigned char MacAddressA[ETH_ALEN];
unsigned char MacAddressB[ETH_ALEN];
enum hsr_dev_idx AddrB_if; /* The local slave through which AddrB
* frames are received from this node
*/
unsigned long time_in[HSR_MAX_SLAVE];
bool time_in_stale[HSR_MAX_SLAVE];
u16 seq_out[HSR_MAX_DEV];
struct rcu_head rcu_head;
struct hsr_node {
struct list_head mac_list;
unsigned char MacAddressA[ETH_ALEN];
unsigned char MacAddressB[ETH_ALEN];
enum hsr_dev_idx AddrB_if;/* The local slave through which AddrB
* frames are received from this node
*/
unsigned long time_in[HSR_MAX_SLAVE];
bool time_in_stale[HSR_MAX_SLAVE];
u16 seq_out[HSR_MAX_DEV];
struct rcu_head rcu_head;
};
/* TODO: use hash lists for mac addresses (linux/jhash.h)? */
@@ -42,10 +42,10 @@ struct node_entry {
/* Search for mac entry. Caller must hold rcu read lock.
*/
static struct node_entry *find_node_by_AddrA(struct list_head *node_db,
const unsigned char addr[ETH_ALEN])
static struct hsr_node *find_node_by_AddrA(struct list_head *node_db,
const unsigned char addr[ETH_ALEN])
{
struct node_entry *node;
struct hsr_node *node;
list_for_each_entry_rcu(node, node_db, mac_list) {
if (ether_addr_equal(node->MacAddressA, addr))
@@ -58,10 +58,10 @@ static struct node_entry *find_node_by_AddrA(struct list_head *node_db,
/* Search for mac entry. Caller must hold rcu read lock.
*/
static struct node_entry *find_node_by_AddrB(struct list_head *node_db,
const unsigned char addr[ETH_ALEN])
static struct hsr_node *find_node_by_AddrB(struct list_head *node_db,
const unsigned char addr[ETH_ALEN])
{
struct node_entry *node;
struct hsr_node *node;
list_for_each_entry_rcu(node, node_db, mac_list) {
if (ether_addr_equal(node->MacAddressB, addr))
@@ -74,9 +74,9 @@ static struct node_entry *find_node_by_AddrB(struct list_head *node_db,
/* Search for mac entry. Caller must hold rcu read lock.
*/
struct node_entry *hsr_find_node(struct list_head *node_db, struct sk_buff *skb)
struct hsr_node *hsr_find_node(struct list_head *node_db, struct sk_buff *skb)
{
struct node_entry *node;
struct hsr_node *node;
struct ethhdr *ethhdr;
if (!skb_mac_header_was_set(skb))
@@ -102,7 +102,7 @@ int hsr_create_self_node(struct list_head *self_node_db,
unsigned char addr_a[ETH_ALEN],
unsigned char addr_b[ETH_ALEN])
{
struct node_entry *node, *oldnode;
struct hsr_node *node, *oldnode;
node = kmalloc(sizeof(*node), GFP_KERNEL);
if (!node)
@@ -113,7 +113,7 @@ int hsr_create_self_node(struct list_head *self_node_db,
rcu_read_lock();
oldnode = list_first_or_null_rcu(self_node_db,
struct node_entry, mac_list);
struct hsr_node, mac_list);
if (oldnode) {
list_replace_rcu(&oldnode->mac_list, &node->mac_list);
rcu_read_unlock();
@@ -154,10 +154,10 @@ int hsr_create_self_node(struct list_head *self_node_db,
* We also need to detect if the sender's SlaveA and SlaveB cables have been
* swapped.
*/
struct node_entry *hsr_merge_node(struct hsr_priv *hsr_priv,
struct node_entry *node,
struct sk_buff *skb,
enum hsr_dev_idx dev_idx)
struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
struct hsr_node *node,
struct sk_buff *skb,
enum hsr_dev_idx dev_idx)
{
struct hsr_sup_payload *hsr_sp;
struct hsr_ethhdr_sp *hsr_ethsup;
@@ -194,7 +194,7 @@ struct node_entry *hsr_merge_node(struct hsr_priv *hsr_priv,
if (node)
return node;
node = find_node_by_AddrA(&hsr_priv->node_db, hsr_sp->MacAddressA);
node = find_node_by_AddrA(&hsr->node_db, hsr_sp->MacAddressA);
if (node) {
/* Node is known, but frame was received from an unknown
* address. Node is PICS_SUBS capable; merge its AddrB.
@@ -224,7 +224,7 @@ struct node_entry *hsr_merge_node(struct hsr_priv *hsr_priv,
for (i = 0; i < HSR_MAX_DEV; i++)
node->seq_out[i] = ntohs(hsr_ethsup->hsr_sup.sequence_nr) - 1;
list_add_tail_rcu(&node->mac_list, &hsr_priv->node_db);
list_add_tail_rcu(&node->mac_list, &hsr->node_db);
return node;
}
@@ -236,10 +236,10 @@ struct node_entry *hsr_merge_node(struct hsr_priv *hsr_priv,
* address with that node's "official" address (MacAddressA) so that upper
* layers recognize where it came from.
*/
void hsr_addr_subst_source(struct hsr_priv *hsr_priv, struct sk_buff *skb)
void hsr_addr_subst_source(struct hsr_priv *hsr, struct sk_buff *skb)
{
struct ethhdr *ethhdr;
struct node_entry *node;
struct hsr_node *node;
if (!skb_mac_header_was_set(skb)) {
WARN_ONCE(1, "%s: Mac header not set\n", __func__);
@@ -248,7 +248,7 @@ void hsr_addr_subst_source(struct hsr_priv *hsr_priv, struct sk_buff *skb)
ethhdr = (struct ethhdr *) skb_mac_header(skb);
rcu_read_lock();
node = find_node_by_AddrB(&hsr_priv->node_db, ethhdr->h_source);
node = find_node_by_AddrB(&hsr->node_db, ethhdr->h_source);
if (node)
ether_addr_copy(ethhdr->h_source, node->MacAddressA);
rcu_read_unlock();
@@ -264,13 +264,13 @@ void hsr_addr_subst_source(struct hsr_priv *hsr_priv, struct sk_buff *skb)
* This is needed to keep the packets flowing through switches that learn on
* which "side" the different interfaces are.
*/
void hsr_addr_subst_dest(struct hsr_priv *hsr_priv, struct ethhdr *ethhdr,
void hsr_addr_subst_dest(struct hsr_priv *hsr, struct ethhdr *ethhdr,
enum hsr_dev_idx dev_idx)
{
struct node_entry *node;
struct hsr_node *node;
rcu_read_lock();
node = find_node_by_AddrA(&hsr_priv->node_db, ethhdr->h_dest);
node = find_node_by_AddrA(&hsr->node_db, ethhdr->h_dest);
if (node && (node->AddrB_if == dev_idx))
ether_addr_copy(ethhdr->h_dest, node->MacAddressB);
rcu_read_unlock();
@@ -295,7 +295,7 @@ static bool seq_nr_after(u16 a, u16 b)
#define seq_nr_before_or_eq(a, b) (!seq_nr_after((a), (b)))
void hsr_register_frame_in(struct node_entry *node, enum hsr_dev_idx dev_idx)
void hsr_register_frame_in(struct hsr_node *node, enum hsr_dev_idx dev_idx)
{
if ((dev_idx < 0) || (dev_idx >= HSR_MAX_SLAVE)) {
WARN_ONCE(1, "%s: Invalid dev_idx (%d)\n", __func__, dev_idx);
@@ -314,7 +314,7 @@ void hsr_register_frame_in(struct node_entry *node, enum hsr_dev_idx dev_idx)
* 0 otherwise, or
* negative error code on error
*/
int hsr_register_frame_out(struct node_entry *node, enum hsr_dev_idx dev_idx,
int hsr_register_frame_out(struct hsr_node *node, enum hsr_dev_idx dev_idx,
struct sk_buff *skb)
{
struct hsr_ethhdr *hsr_ethhdr;
@@ -340,7 +340,7 @@ int hsr_register_frame_out(struct node_entry *node, enum hsr_dev_idx dev_idx,
static bool is_late(struct node_entry *node, enum hsr_dev_idx dev_idx)
static bool is_late(struct hsr_node *node, enum hsr_dev_idx dev_idx)
{
enum hsr_dev_idx other;
@@ -366,14 +366,14 @@ static bool is_late(struct node_entry *node, enum hsr_dev_idx dev_idx)
/* Remove stale sequence_nr records. Called by timer every
* HSR_LIFE_CHECK_INTERVAL (two seconds or so).
*/
void hsr_prune_nodes(struct hsr_priv *hsr_priv)
void hsr_prune_nodes(struct hsr_priv *hsr)
{
struct node_entry *node;
struct hsr_node *node;
unsigned long timestamp;
unsigned long time_a, time_b;
rcu_read_lock();
list_for_each_entry_rcu(node, &hsr_priv->node_db, mac_list) {
list_for_each_entry_rcu(node, &hsr->node_db, mac_list) {
/* Shorthand */
time_a = node->time_in[HSR_DEV_SLAVE_A];
time_b = node->time_in[HSR_DEV_SLAVE_B];
@@ -399,17 +399,17 @@ void hsr_prune_nodes(struct hsr_priv *hsr_priv)
msecs_to_jiffies(1.5*MAX_SLAVE_DIFF))) {
if (is_late(node, HSR_DEV_SLAVE_A))
hsr_nl_ringerror(hsr_priv, node->MacAddressA,
hsr_nl_ringerror(hsr, node->MacAddressA,
HSR_DEV_SLAVE_A);
else if (is_late(node, HSR_DEV_SLAVE_B))
hsr_nl_ringerror(hsr_priv, node->MacAddressA,
hsr_nl_ringerror(hsr, node->MacAddressA,
HSR_DEV_SLAVE_B);
}
/* Prune old entries */
if (time_is_before_jiffies(timestamp +
msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
hsr_nl_nodedown(hsr_priv, node->MacAddressA);
hsr_nl_nodedown(hsr, node->MacAddressA);
list_del_rcu(&node->mac_list);
/* Note that we need to free this entry later: */
kfree_rcu(node, rcu_head);
@@ -419,21 +419,21 @@ void hsr_prune_nodes(struct hsr_priv *hsr_priv)
}
void *hsr_get_next_node(struct hsr_priv *hsr_priv, void *_pos,
void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
unsigned char addr[ETH_ALEN])
{
struct node_entry *node;
struct hsr_node *node;
if (!_pos) {
node = list_first_or_null_rcu(&hsr_priv->node_db,
struct node_entry, mac_list);
node = list_first_or_null_rcu(&hsr->node_db,
struct hsr_node, mac_list);
if (node)
ether_addr_copy(addr, node->MacAddressA);
return node;
}
node = _pos;
list_for_each_entry_continue_rcu(node, &hsr_priv->node_db, mac_list) {
list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) {
ether_addr_copy(addr, node->MacAddressA);
return node;
}
@@ -442,7 +442,7 @@ void *hsr_get_next_node(struct hsr_priv *hsr_priv, void *_pos,
}
int hsr_get_node_data(struct hsr_priv *hsr_priv,
int hsr_get_node_data(struct hsr_priv *hsr,
const unsigned char *addr,
unsigned char addr_b[ETH_ALEN],
unsigned int *addr_b_ifindex,
@@ -451,12 +451,12 @@ int hsr_get_node_data(struct hsr_priv *hsr_priv,
int *if2_age,
u16 *if2_seq)
{
struct node_entry *node;
struct hsr_node *node;
unsigned long tdiff;
rcu_read_lock();
node = find_node_by_AddrA(&hsr_priv->node_db, addr);
node = find_node_by_AddrA(&hsr->node_db, addr);
if (!node) {
rcu_read_unlock();
return -ENOENT; /* No such entry */
@@ -488,8 +488,8 @@ int hsr_get_node_data(struct hsr_priv *hsr_priv,
*if1_seq = node->seq_out[HSR_DEV_SLAVE_B];
*if2_seq = node->seq_out[HSR_DEV_SLAVE_A];
if ((node->AddrB_if != HSR_DEV_NONE) && hsr_priv->slave[node->AddrB_if])
*addr_b_ifindex = hsr_priv->slave[node->AddrB_if]->ifindex;
if ((node->AddrB_if != HSR_DEV_NONE) && hsr->slave[node->AddrB_if])
*addr_b_ifindex = hsr->slave[node->AddrB_if]->ifindex;
else
*addr_b_ifindex = -1;