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-rw-r--r--net/hsr/hsr_framereg.c127
1 files changed, 53 insertions, 74 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index 9af16cb68f76..9fa9abd83018 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/* 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
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
* Author(s):
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
*
@@ -22,23 +18,8 @@
#include "hsr_framereg.h"
#include "hsr_netlink.h"
-
-struct hsr_node {
- struct list_head mac_list;
- unsigned char MacAddressA[ETH_ALEN];
- unsigned char MacAddressB[ETH_ALEN];
- /* 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;
-};
-
-
/* TODO: use hash lists for mac addresses (linux/jhash.h)? */
-
/* seq_nr_after(a, b) - return true if a is after (higher in sequence than) b,
* false otherwise.
*/
@@ -47,16 +28,16 @@ static bool seq_nr_after(u16 a, u16 b)
/* Remove inconsistency where
* seq_nr_after(a, b) == seq_nr_before(a, b)
*/
- if ((int) b - a == 32768)
+ if ((int)b - a == 32768)
return false;
- return (((s16) (b - a)) < 0);
+ return (((s16)(b - a)) < 0);
}
+
#define seq_nr_before(a, b) seq_nr_after((b), (a))
#define seq_nr_after_or_eq(a, b) (!seq_nr_before((a), (b)))
#define seq_nr_before_or_eq(a, b) (!seq_nr_after((a), (b)))
-
bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
{
struct hsr_node *node;
@@ -68,9 +49,9 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
return false;
}
- if (ether_addr_equal(addr, node->MacAddressA))
+ if (ether_addr_equal(addr, node->macaddress_A))
return true;
- if (ether_addr_equal(addr, node->MacAddressB))
+ if (ether_addr_equal(addr, node->macaddress_B))
return true;
return false;
@@ -78,20 +59,19 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
/* Search for mac entry. Caller must hold rcu read lock.
*/
-static struct hsr_node *find_node_by_AddrA(struct list_head *node_db,
- const unsigned char addr[ETH_ALEN])
+static struct hsr_node *find_node_by_addr_A(struct list_head *node_db,
+ const unsigned char addr[ETH_ALEN])
{
struct hsr_node *node;
list_for_each_entry_rcu(node, node_db, mac_list) {
- if (ether_addr_equal(node->MacAddressA, addr))
+ if (ether_addr_equal(node->macaddress_A, addr))
return node;
}
return NULL;
}
-
/* Helper for device init; the self_node_db is used in hsr_rcv() to recognize
* frames from self that's been looped over the HSR ring.
*/
@@ -105,12 +85,12 @@ int hsr_create_self_node(struct list_head *self_node_db,
if (!node)
return -ENOMEM;
- ether_addr_copy(node->MacAddressA, addr_a);
- ether_addr_copy(node->MacAddressB, addr_b);
+ ether_addr_copy(node->macaddress_A, addr_a);
+ ether_addr_copy(node->macaddress_B, addr_b);
rcu_read_lock();
oldnode = list_first_or_null_rcu(self_node_db,
- struct hsr_node, mac_list);
+ struct hsr_node, mac_list);
if (oldnode) {
list_replace_rcu(&oldnode->mac_list, &node->mac_list);
rcu_read_unlock();
@@ -137,7 +117,7 @@ void hsr_del_node(struct list_head *self_node_db)
}
}
-/* Allocate an hsr_node and add it to node_db. 'addr' is the node's AddressA;
+/* Allocate an hsr_node and add it to node_db. 'addr' is the node's address_A;
* seq_out is used to initialize filtering of outgoing duplicate frames
* originating from the newly added node.
*/
@@ -152,7 +132,7 @@ struct hsr_node *hsr_add_node(struct list_head *node_db, unsigned char addr[],
if (!node)
return NULL;
- ether_addr_copy(node->MacAddressA, addr);
+ ether_addr_copy(node->macaddress_A, addr);
/* We are only interested in time diffs here, so use current jiffies
* as initialization. (0 could trigger an spurious ring error warning).
@@ -181,19 +161,19 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct sk_buff *skb,
if (!skb_mac_header_was_set(skb))
return NULL;
- ethhdr = (struct ethhdr *) skb_mac_header(skb);
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
list_for_each_entry_rcu(node, node_db, mac_list) {
- if (ether_addr_equal(node->MacAddressA, ethhdr->h_source))
+ if (ether_addr_equal(node->macaddress_A, ethhdr->h_source))
return node;
- if (ether_addr_equal(node->MacAddressB, ethhdr->h_source))
+ if (ether_addr_equal(node->macaddress_B, ethhdr->h_source))
return node;
}
/* Everyone may create a node entry, connected node to a HSR device. */
- if (ethhdr->h_proto == htons(ETH_P_PRP)
- || ethhdr->h_proto == htons(ETH_P_HSR)) {
+ if (ethhdr->h_proto == htons(ETH_P_PRP) ||
+ ethhdr->h_proto == htons(ETH_P_HSR)) {
/* Use the existing sequence_nr from the tag as starting point
* for filtering duplicate frames.
*/
@@ -210,8 +190,8 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct sk_buff *skb,
return hsr_add_node(node_db, ethhdr->h_source, seq_out);
}
-/* Use the Supervision frame's info about an eventual MacAddressB for merging
- * nodes that has previously had their MacAddressB registered as a separate
+/* Use the Supervision frame's info about an eventual macaddress_B for merging
+ * nodes that has previously had their macaddress_B registered as a separate
* node.
*/
void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
@@ -223,7 +203,7 @@ void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
struct list_head *node_db;
int i;
- ethhdr = (struct ethhdr *) skb_mac_header(skb);
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
/* Leave the ethernet header. */
skb_pull(skb, sizeof(struct ethhdr));
@@ -235,14 +215,14 @@ void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
/* And leave the HSR sup tag. */
skb_pull(skb, sizeof(struct hsr_sup_tag));
- hsr_sp = (struct hsr_sup_payload *) skb->data;
+ hsr_sp = (struct hsr_sup_payload *)skb->data;
- /* Merge node_curr (registered on MacAddressB) into node_real */
+ /* Merge node_curr (registered on macaddress_B) into node_real */
node_db = &port_rcv->hsr->node_db;
- node_real = find_node_by_AddrA(node_db, hsr_sp->MacAddressA);
+ node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A);
if (!node_real)
/* No frame received from AddrA of this node yet */
- node_real = hsr_add_node(node_db, hsr_sp->MacAddressA,
+ node_real = hsr_add_node(node_db, hsr_sp->macaddress_A,
HSR_SEQNR_START - 1);
if (!node_real)
goto done; /* No mem */
@@ -250,17 +230,18 @@ void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
/* Node has already been merged */
goto done;
- ether_addr_copy(node_real->MacAddressB, ethhdr->h_source);
+ ether_addr_copy(node_real->macaddress_B, ethhdr->h_source);
for (i = 0; i < HSR_PT_PORTS; i++) {
if (!node_curr->time_in_stale[i] &&
time_after(node_curr->time_in[i], node_real->time_in[i])) {
node_real->time_in[i] = node_curr->time_in[i];
- node_real->time_in_stale[i] = node_curr->time_in_stale[i];
+ node_real->time_in_stale[i] =
+ node_curr->time_in_stale[i];
}
if (seq_nr_after(node_curr->seq_out[i], node_real->seq_out[i]))
node_real->seq_out[i] = node_curr->seq_out[i];
}
- node_real->AddrB_port = port_rcv->type;
+ node_real->addr_B_port = port_rcv->type;
list_del_rcu(&node_curr->mac_list);
kfree_rcu(node_curr, rcu_head);
@@ -269,11 +250,10 @@ done:
skb_push(skb, sizeof(struct hsrv1_ethhdr_sp));
}
-
/* 'skb' is a frame meant for this host, that is to be passed to upper layers.
*
* If the frame was sent by a node's B interface, replace the source
- * address with that node's "official" address (MacAddressA) so that upper
+ * address with that node's "official" address (macaddress_A) so that upper
* layers recognize where it came from.
*/
void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb)
@@ -283,7 +263,7 @@ void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb)
return;
}
- memcpy(&eth_hdr(skb)->h_source, node->MacAddressA, ETH_ALEN);
+ memcpy(&eth_hdr(skb)->h_source, node->macaddress_A, ETH_ALEN);
}
/* 'skb' is a frame meant for another host.
@@ -308,18 +288,18 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
if (!is_unicast_ether_addr(eth_hdr(skb)->h_dest))
return;
- node_dst = find_node_by_AddrA(&port->hsr->node_db, eth_hdr(skb)->h_dest);
+ node_dst = find_node_by_addr_A(&port->hsr->node_db,
+ eth_hdr(skb)->h_dest);
if (!node_dst) {
WARN_ONCE(1, "%s: Unknown node\n", __func__);
return;
}
- if (port->type != node_dst->AddrB_port)
+ if (port->type != node_dst->addr_B_port)
return;
- ether_addr_copy(eth_hdr(skb)->h_dest, node_dst->MacAddressB);
+ ether_addr_copy(eth_hdr(skb)->h_dest, node_dst->macaddress_B);
}
-
void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
u16 sequence_nr)
{
@@ -352,7 +332,6 @@ int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
return 0;
}
-
static struct hsr_port *get_late_port(struct hsr_priv *hsr,
struct hsr_node *node)
{
@@ -373,7 +352,6 @@ static struct hsr_port *get_late_port(struct hsr_priv *hsr,
return NULL;
}
-
/* Remove stale sequence_nr records. Called by timer every
* HSR_LIFE_CHECK_INTERVAL (two seconds or so).
*/
@@ -392,9 +370,9 @@ void hsr_prune_nodes(struct timer_list *t)
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))
+ if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
node->time_in_stale[HSR_PT_SLAVE_A] = true;
- if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET/2))
+ if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
node->time_in_stale[HSR_PT_SLAVE_B] = true;
/* Get age of newest frame from node.
@@ -409,26 +387,29 @@ void hsr_prune_nodes(struct timer_list *t)
/* 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))) {
+ msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
rcu_read_lock();
port = get_late_port(hsr, node);
- if (port != NULL)
- hsr_nl_ringerror(hsr, node->MacAddressA, port);
+ if (port)
+ hsr_nl_ringerror(hsr, node->macaddress_A, port);
rcu_read_unlock();
}
/* Prune old entries */
if (time_is_before_jiffies(timestamp +
- msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
- hsr_nl_nodedown(hsr, node->MacAddressA);
+ msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
+ hsr_nl_nodedown(hsr, node->macaddress_A);
list_del_rcu(&node->mac_list);
/* Note that we need to free this entry later: */
kfree_rcu(node, rcu_head);
}
}
rcu_read_unlock();
-}
+ /* Restart timer */
+ mod_timer(&hsr->prune_timer,
+ jiffies + msecs_to_jiffies(PRUNE_PERIOD));
+}
void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
unsigned char addr[ETH_ALEN])
@@ -439,20 +420,19 @@ void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
node = list_first_or_null_rcu(&hsr->node_db,
struct hsr_node, mac_list);
if (node)
- ether_addr_copy(addr, node->MacAddressA);
+ ether_addr_copy(addr, node->macaddress_A);
return node;
}
node = _pos;
list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) {
- ether_addr_copy(addr, node->MacAddressA);
+ ether_addr_copy(addr, node->macaddress_A);
return node;
}
return NULL;
}
-
int hsr_get_node_data(struct hsr_priv *hsr,
const unsigned char *addr,
unsigned char addr_b[ETH_ALEN],
@@ -466,15 +446,14 @@ int hsr_get_node_data(struct hsr_priv *hsr,
struct hsr_port *port;
unsigned long tdiff;
-
rcu_read_lock();
- node = find_node_by_AddrA(&hsr->node_db, addr);
+ node = find_node_by_addr_A(&hsr->node_db, addr);
if (!node) {
rcu_read_unlock();
return -ENOENT; /* No such entry */
}
- ether_addr_copy(addr_b, node->MacAddressB);
+ ether_addr_copy(addr_b, node->macaddress_B);
tdiff = jiffies - node->time_in[HSR_PT_SLAVE_A];
if (node->time_in_stale[HSR_PT_SLAVE_A])
@@ -500,8 +479,8 @@ int hsr_get_node_data(struct hsr_priv *hsr,
*if1_seq = node->seq_out[HSR_PT_SLAVE_B];
*if2_seq = node->seq_out[HSR_PT_SLAVE_A];
- if (node->AddrB_port != HSR_PT_NONE) {
- port = hsr_port_get_hsr(hsr, node->AddrB_port);
+ if (node->addr_B_port != HSR_PT_NONE) {
+ port = hsr_port_get_hsr(hsr, node->addr_B_port);
*addr_b_ifindex = port->dev->ifindex;
} else {
*addr_b_ifindex = -1;