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authorArvid Brodin <arvid.brodin@alten.se>2014-07-05 01:38:05 +0400
committerDavid S. Miller <davem@davemloft.net>2014-07-08 22:35:31 +0400
commitc5a7591172100269e426cf630da0f2dc8138a206 (patch)
tree1b77a7c8bf531b24d227e165bd10ab15bb9c0680 /net/hsr/hsr_framereg.c
parent51f3c605318b056ac5deb9079bbef2a976558827 (diff)
downloadlinux-c5a7591172100269e426cf630da0f2dc8138a206.tar.xz
net/hsr: Use list_head (and rcu) instead of array for slave devices.
Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr/hsr_framereg.c')
-rw-r--r--net/hsr/hsr_framereg.c142
1 files changed, 64 insertions, 78 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index 3666f94c526f..c9b78c52c75b 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c
@@ -27,12 +27,11 @@ 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];
+ /* Local slave through which AddrB frames are received from this node */
+ enum hsr_port_type AddrB_port;
+ unsigned long time_in[HSR_PT_PORTS];
+ bool time_in_stale[HSR_PT_PORTS];
+ u16 seq_out[HSR_PT_PORTS];
struct rcu_head rcu_head;
};
@@ -154,11 +153,10 @@ 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 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_node *hsr_merge_node(struct hsr_node *node, struct sk_buff *skb,
+ struct hsr_port *port)
{
+ struct hsr_priv *hsr;
struct hsr_sup_payload *hsr_sp;
struct hsr_ethhdr_sp *hsr_ethsup;
int i;
@@ -166,6 +164,7 @@ struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
hsr_ethsup = (struct hsr_ethhdr_sp *) skb_mac_header(skb);
hsr_sp = (struct hsr_sup_payload *) skb->data;
+ hsr = port->hsr;
if (node && !ether_addr_equal(node->MacAddressA, hsr_sp->MacAddressA)) {
/* Node has changed its AddrA, frame was received from SlaveB */
@@ -174,7 +173,7 @@ struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
node = NULL;
}
- if (node && (dev_idx == node->AddrB_if) &&
+ if (node && (port->type == node->AddrB_port) &&
!ether_addr_equal(node->MacAddressB, hsr_ethsup->ethhdr.h_source)) {
/* Cables have been swapped */
list_del_rcu(&node->mac_list);
@@ -182,8 +181,8 @@ struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
node = NULL;
}
- if (node && (dev_idx != node->AddrB_if) &&
- (node->AddrB_if != HSR_DEV_NONE) &&
+ if (node && (port->type != node->AddrB_port) &&
+ (node->AddrB_port != HSR_PT_NONE) &&
!ether_addr_equal(node->MacAddressA, hsr_ethsup->ethhdr.h_source)) {
/* Cables have been swapped */
list_del_rcu(&node->mac_list);
@@ -200,7 +199,7 @@ struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
* address. Node is PICS_SUBS capable; merge its AddrB.
*/
ether_addr_copy(node->MacAddressB, hsr_ethsup->ethhdr.h_source);
- node->AddrB_if = dev_idx;
+ node->AddrB_port = port->type;
return node;
}
@@ -211,17 +210,15 @@ struct hsr_node *hsr_merge_node(struct hsr_priv *hsr,
ether_addr_copy(node->MacAddressA, hsr_sp->MacAddressA);
ether_addr_copy(node->MacAddressB, hsr_ethsup->ethhdr.h_source);
if (!ether_addr_equal(hsr_sp->MacAddressA, hsr_ethsup->ethhdr.h_source))
- node->AddrB_if = dev_idx;
- else
- node->AddrB_if = HSR_DEV_NONE;
+ node->AddrB_port = port->type;
/* We are only interested in time diffs here, so use current jiffies
* as initialization. (0 could trigger an spurious ring error warning).
*/
now = jiffies;
- for (i = 0; i < HSR_MAX_SLAVE; i++)
+ for (i = 0; i < HSR_PT_PORTS; i++)
node->time_in[i] = now;
- for (i = 0; i < HSR_MAX_DEV; i++)
+ for (i = 0; i < HSR_PT_PORTS; i++)
node->seq_out[i] = ntohs(hsr_ethsup->hsr_sup.sequence_nr) - 1;
list_add_tail_rcu(&node->mac_list, &hsr->node_db);
@@ -265,13 +262,13 @@ void hsr_addr_subst_source(struct hsr_priv *hsr, struct sk_buff *skb)
* which "side" the different interfaces are.
*/
void hsr_addr_subst_dest(struct hsr_priv *hsr, struct ethhdr *ethhdr,
- enum hsr_dev_idx dev_idx)
+ struct hsr_port *port)
{
struct hsr_node *node;
rcu_read_lock();
node = find_node_by_AddrA(&hsr->node_db, ethhdr->h_dest);
- if (node && (node->AddrB_if == dev_idx))
+ if (node && (node->AddrB_port == port->type))
ether_addr_copy(ethhdr->h_dest, node->MacAddressB);
rcu_read_unlock();
}
@@ -295,14 +292,10 @@ 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 hsr_node *node, enum hsr_dev_idx dev_idx)
+void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port)
{
- if ((dev_idx < 0) || (dev_idx >= HSR_MAX_SLAVE)) {
- WARN_ONCE(1, "%s: Invalid dev_idx (%d)\n", __func__, dev_idx);
- return;
- }
- node->time_in[dev_idx] = jiffies;
- node->time_in_stale[dev_idx] = false;
+ node->time_in[port->type] = jiffies;
+ node->time_in_stale[port->type] = false;
}
@@ -314,16 +307,12 @@ void hsr_register_frame_in(struct hsr_node *node, enum hsr_dev_idx dev_idx)
* 0 otherwise, or
* negative error code on error
*/
-int hsr_register_frame_out(struct hsr_node *node, enum hsr_dev_idx dev_idx,
+int hsr_register_frame_out(struct hsr_node *node, struct hsr_port *port,
struct sk_buff *skb)
{
struct hsr_ethhdr *hsr_ethhdr;
u16 sequence_nr;
- if ((dev_idx < 0) || (dev_idx >= HSR_MAX_DEV)) {
- WARN_ONCE(1, "%s: Invalid dev_idx (%d)\n", __func__, dev_idx);
- return -EINVAL;
- }
if (!skb_mac_header_was_set(skb)) {
WARN_ONCE(1, "%s: Mac header not set\n", __func__);
return -EINVAL;
@@ -331,35 +320,32 @@ int hsr_register_frame_out(struct hsr_node *node, enum hsr_dev_idx dev_idx,
hsr_ethhdr = (struct hsr_ethhdr *) skb_mac_header(skb);
sequence_nr = ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
- if (seq_nr_before_or_eq(sequence_nr, node->seq_out[dev_idx]))
+ if (seq_nr_before_or_eq(sequence_nr, node->seq_out[port->type]))
return 1;
- node->seq_out[dev_idx] = sequence_nr;
+ node->seq_out[port->type] = sequence_nr;
return 0;
}
-
-static bool is_late(struct hsr_node *node, enum hsr_dev_idx dev_idx)
+static struct hsr_port *get_late_port(struct hsr_priv *hsr,
+ struct hsr_node *node)
{
- enum hsr_dev_idx other;
-
- if (node->time_in_stale[dev_idx])
- return true;
-
- if (dev_idx == HSR_DEV_SLAVE_A)
- other = HSR_DEV_SLAVE_B;
- else
- other = HSR_DEV_SLAVE_A;
-
- if (node->time_in_stale[other])
- return false;
+ if (node->time_in_stale[HSR_PT_SLAVE_A])
+ return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
+ if (node->time_in_stale[HSR_PT_SLAVE_B])
+ return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
+
+ if (time_after(node->time_in[HSR_PT_SLAVE_B],
+ node->time_in[HSR_PT_SLAVE_A] +
+ msecs_to_jiffies(MAX_SLAVE_DIFF)))
+ return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
+ if (time_after(node->time_in[HSR_PT_SLAVE_A],
+ node->time_in[HSR_PT_SLAVE_B] +
+ msecs_to_jiffies(MAX_SLAVE_DIFF)))
+ return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
- if (time_after(node->time_in[other], node->time_in[dev_idx] +
- msecs_to_jiffies(MAX_SLAVE_DIFF)))
- return true;
-
- return false;
+ return NULL;
}
@@ -370,6 +356,7 @@ void hsr_prune_nodes(unsigned long data)
{
struct hsr_priv *hsr;
struct hsr_node *node;
+ struct hsr_port *port;
unsigned long timestamp;
unsigned long time_a, time_b;
@@ -378,35 +365,33 @@ void hsr_prune_nodes(unsigned long data)
rcu_read_lock();
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];
+ time_a = node->time_in[HSR_PT_SLAVE_A];
+ time_b = node->time_in[HSR_PT_SLAVE_B];
/* Check for timestamps old enough to risk wrap-around */
if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET/2))
- node->time_in_stale[HSR_DEV_SLAVE_A] = true;
+ node->time_in_stale[HSR_PT_SLAVE_A] = true;
if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET/2))
- node->time_in_stale[HSR_DEV_SLAVE_B] = true;
+ node->time_in_stale[HSR_PT_SLAVE_B] = true;
/* Get age of newest frame from node.
* At least one time_in is OK here; nodes get pruned long
* before both time_ins can get stale
*/
timestamp = time_a;
- if (node->time_in_stale[HSR_DEV_SLAVE_A] ||
- (!node->time_in_stale[HSR_DEV_SLAVE_B] &&
+ if (node->time_in_stale[HSR_PT_SLAVE_A] ||
+ (!node->time_in_stale[HSR_PT_SLAVE_B] &&
time_after(time_b, time_a)))
timestamp = time_b;
/* Warn of ring error only as long as we get frames at all */
if (time_is_after_jiffies(timestamp +
msecs_to_jiffies(1.5*MAX_SLAVE_DIFF))) {
-
- if (is_late(node, HSR_DEV_SLAVE_A))
- hsr_nl_ringerror(hsr, node->MacAddressA,
- HSR_DEV_SLAVE_A);
- else if (is_late(node, HSR_DEV_SLAVE_B))
- hsr_nl_ringerror(hsr, node->MacAddressA,
- HSR_DEV_SLAVE_B);
+ rcu_read_lock();
+ port = get_late_port(hsr, node);
+ if (port != NULL)
+ hsr_nl_ringerror(hsr, node->MacAddressA, port);
+ rcu_read_unlock();
}
/* Prune old entries */
@@ -455,7 +440,7 @@ int hsr_get_node_data(struct hsr_priv *hsr,
u16 *if2_seq)
{
struct hsr_node *node;
- struct net_device *slave;
+ struct hsr_port *port;
unsigned long tdiff;
@@ -468,8 +453,8 @@ int hsr_get_node_data(struct hsr_priv *hsr,
ether_addr_copy(addr_b, node->MacAddressB);
- tdiff = jiffies - node->time_in[HSR_DEV_SLAVE_A];
- if (node->time_in_stale[HSR_DEV_SLAVE_A])
+ tdiff = jiffies - node->time_in[HSR_PT_SLAVE_A];
+ if (node->time_in_stale[HSR_PT_SLAVE_A])
*if1_age = INT_MAX;
#if HZ <= MSEC_PER_SEC
else if (tdiff > msecs_to_jiffies(INT_MAX))
@@ -478,8 +463,8 @@ int hsr_get_node_data(struct hsr_priv *hsr,
else
*if1_age = jiffies_to_msecs(tdiff);
- tdiff = jiffies - node->time_in[HSR_DEV_SLAVE_B];
- if (node->time_in_stale[HSR_DEV_SLAVE_B])
+ tdiff = jiffies - node->time_in[HSR_PT_SLAVE_B];
+ if (node->time_in_stale[HSR_PT_SLAVE_B])
*if2_age = INT_MAX;
#if HZ <= MSEC_PER_SEC
else if (tdiff > msecs_to_jiffies(INT_MAX))
@@ -489,14 +474,15 @@ int hsr_get_node_data(struct hsr_priv *hsr,
*if2_age = jiffies_to_msecs(tdiff);
/* Present sequence numbers as if they were incoming on interface */
- *if1_seq = node->seq_out[HSR_DEV_SLAVE_B];
- *if2_seq = node->seq_out[HSR_DEV_SLAVE_A];
+ *if1_seq = node->seq_out[HSR_PT_SLAVE_B];
+ *if2_seq = node->seq_out[HSR_PT_SLAVE_A];
- slave = hsr->slave[node->AddrB_if];
- if ((node->AddrB_if != HSR_DEV_NONE) && slave)
- *addr_b_ifindex = slave->ifindex;
- else
+ if (node->AddrB_port != HSR_PT_NONE) {
+ port = hsr_port_get_hsr(hsr, node->AddrB_port);
+ *addr_b_ifindex = port->dev->ifindex;
+ } else {
*addr_b_ifindex = -1;
+ }
rcu_read_unlock();