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tipc: introduce link entry structure to struct tipc_node

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struct 'tipc_node' currently contains two arrays for link attributes,
one for the link pointers, and one for the usable link MTUs.

We now group those into a new struct 'tipc_link_entry', and intoduce
one single array consisting of such enties. Apart from being a cosmetic
improvement, this is a starting point for the strict master-slave
relation between node and link that we will introduce in the following
commits.

Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy
2015-07-16 16:54:19 -04:00
committed by David S. Miller
parent 6acc232660
commit 9d13ec65ed
6 changed files with 144 additions and 137 deletions
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60
net/tipc/link.c
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@@ -132,9 +132,11 @@ static void tipc_link_put(struct tipc_link *l_ptr)
static struct tipc_link *tipc_parallel_link(struct tipc_link *l)
{
if (l->owner->active_links[0] != l)
return l->owner->active_links[0];
return l->owner->active_links[1];
struct tipc_node *n = l->owner;
if (node_active_link(n, 0) != l)
return node_active_link(n, 0);
return node_active_link(n, 1);
}
/*
@@ -147,10 +149,11 @@ int tipc_link_is_up(struct tipc_link *l_ptr)
return link_working_working(l_ptr) || link_working_unknown(l_ptr);
}
int tipc_link_is_active(struct tipc_link *l_ptr)
int tipc_link_is_active(struct tipc_link *l)
{
return (l_ptr->owner->active_links[0] == l_ptr) ||
(l_ptr->owner->active_links[1] == l_ptr);
struct tipc_node *n = l->owner;
return (node_active_link(n, 0) == l) || (node_active_link(n, 1) == l);
}
/**
@@ -240,7 +243,7 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
return NULL;
}
if (n_ptr->links[b_ptr->identity]) {
if (n_ptr->links[b_ptr->identity].link) {
tipc_addr_string_fill(addr_string, n_ptr->addr);
pr_err("Attempt to establish second link on <%s> to %s\n",
b_ptr->name, addr_string);
@@ -321,7 +324,7 @@ void tipc_link_delete_list(struct net *net, unsigned int bearer_id)
rcu_read_lock();
list_for_each_entry_rcu(node, &tn->node_list, list) {
tipc_node_lock(node);
link = node->links[bearer_id];
link = node->links[bearer_id].link;
if (link)
tipc_link_delete(link);
tipc_node_unlock(node);
@@ -446,7 +449,7 @@ void tipc_link_reset(struct tipc_link *l_ptr)
if ((prev_state == RESET_UNKNOWN) || (prev_state == RESET_RESET))
return;
tipc_node_link_down(l_ptr->owner, l_ptr);
tipc_node_link_down(l_ptr->owner, l_ptr->bearer_id);
tipc_bearer_remove_dest(owner->net, l_ptr->bearer_id, l_ptr->addr);
if (was_active_link && tipc_node_is_up(l_ptr->owner) && (pl != l_ptr)) {
@@ -482,7 +485,7 @@ static void link_activate(struct tipc_link *link)
link->rcv_nxt = 1;
link->stats.recv_info = 1;
link->silent_intv_cnt = 0;
tipc_node_link_up(node, link);
tipc_node_link_up(node, link->bearer_id);
tipc_bearer_add_dest(node->net, link->bearer_id, link->addr);
}
@@ -577,7 +580,7 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event)
case TRAFFIC_MSG_EVT:
break;
case ACTIVATE_MSG:
other = l_ptr->owner->active_links[0];
other = node_active_link(l_ptr->owner, 0);
if (other && link_working_unknown(other))
break;
l_ptr->state = WORKING_WORKING;
@@ -606,7 +609,7 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event)
switch (event) {
case TRAFFIC_MSG_EVT:
case ACTIVATE_MSG:
other = l_ptr->owner->active_links[0];
other = node_active_link(l_ptr->owner, 0);
if (other && link_working_unknown(other))
break;
l_ptr->state = WORKING_WORKING;
@@ -755,7 +758,7 @@ int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dnode,
node = tipc_node_find(net, dnode);
if (node) {
tipc_node_lock(node);
link = node->active_links[selector & 1];
link = node_active_link(node, selector & 1);
if (link)
rc = __tipc_link_xmit(net, link, list);
tipc_node_unlock(node);
@@ -858,9 +861,9 @@ void tipc_link_reset_all(struct tipc_node *node)
tipc_addr_string_fill(addr_string, node->addr));
for (i = 0; i < MAX_BEARERS; i++) {
if (node->links[i]) {
link_print(node->links[i], "Resetting link\n");
tipc_link_reset(node->links[i]);
if (node->links[i].link) {
link_print(node->links[i].link, "Resetting link\n");
tipc_link_reset(node->links[i].link);
}
}
@@ -1029,7 +1032,7 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
tipc_node_lock(n_ptr);
/* Locate unicast link endpoint that should handle message */
l_ptr = n_ptr->links[b_ptr->identity];
l_ptr = n_ptr->links[b_ptr->identity].link;
if (unlikely(!l_ptr))
goto unlock;
@@ -1496,7 +1499,7 @@ static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr,
struct sk_buff *skb;
u32 length = msg_size(msg);
tunnel = l_ptr->owner->active_links[selector & 1];
tunnel = node_active_link(l_ptr->owner, selector & 1);
if (!tipc_link_is_up(tunnel)) {
pr_warn("%stunnel link no longer available\n", link_co_err);
return;
@@ -1522,7 +1525,7 @@ static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr,
void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
{
int msgcount;
struct tipc_link *tunnel = l_ptr->owner->active_links[0];
struct tipc_link *tunnel = node_active_link(l_ptr->owner, 0);
struct tipc_msg tunnel_hdr;
struct sk_buff *skb;
int split_bundles;
@@ -1556,8 +1559,8 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
return;
}
split_bundles = (l_ptr->owner->active_links[0] !=
l_ptr->owner->active_links[1]);
split_bundles = (node_active_link(l_ptr->owner, 0) !=
node_active_link(l_ptr->owner, 0));
skb_queue_walk(&l_ptr->transmq, skb) {
struct tipc_msg *msg = buf_msg(skb);
@@ -1660,7 +1663,7 @@ static bool tipc_link_failover_rcv(struct tipc_link *link,
if (bearer_id == link->bearer_id)
goto exit;
pl = link->owner->links[bearer_id];
pl = link->owner->links[bearer_id].link;
if (pl && tipc_link_is_up(pl))
tipc_link_reset(pl);
@@ -1743,7 +1746,7 @@ static struct tipc_node *tipc_link_find_owner(struct net *net,
list_for_each_entry_rcu(n_ptr, &tn->node_list, list) {
tipc_node_lock(n_ptr);
for (i = 0; i < MAX_BEARERS; i++) {
l_ptr = n_ptr->links[i];
l_ptr = n_ptr->links[i].link;
if (l_ptr && !strcmp(l_ptr->name, link_name)) {
*bearer_id = i;
found_node = n_ptr;
@@ -1865,7 +1868,7 @@ int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info)
tipc_node_lock(node);
link = node->links[bearer_id];
link = node->links[bearer_id].link;
if (!link) {
res = -EINVAL;
goto out;
@@ -2055,10 +2058,11 @@ static int __tipc_nl_add_node_links(struct net *net, struct tipc_nl_msg *msg,
for (i = *prev_link; i < MAX_BEARERS; i++) {
*prev_link = i;
if (!node->links[i])
if (!node->links[i].link)
continue;
err = __tipc_nl_add_link(net, msg, node->links[i], NLM_F_MULTI);
err = __tipc_nl_add_link(net, msg,
node->links[i].link, NLM_F_MULTI);
if (err)
return err;
}
@@ -2172,7 +2176,7 @@ int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
tipc_node_lock(node);
link = node->links[bearer_id];
link = node->links[bearer_id].link;
if (!link) {
tipc_node_unlock(node);
nlmsg_free(msg.skb);
@@ -2227,7 +2231,7 @@ int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info)
tipc_node_lock(node);
link = node->links[bearer_id];
link = node->links[bearer_id].link;
if (!link) {
tipc_node_unlock(node);
return -EINVAL;