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);
}
/*
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);
}
/**
*/
struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
struct tipc_bearer *b_ptr,
- const struct tipc_media_addr *media_addr)
+ const struct tipc_media_addr *media_addr,
+ struct sk_buff_head *inputq,
+ struct sk_buff_head *namedq)
{
struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id);
struct tipc_link *l_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);
__skb_queue_head_init(&l_ptr->backlogq);
__skb_queue_head_init(&l_ptr->deferdq);
skb_queue_head_init(&l_ptr->wakeupq);
- skb_queue_head_init(&l_ptr->inputq);
- skb_queue_head_init(&l_ptr->namedq);
+ l_ptr->inputq = inputq;
+ l_ptr->namedq = namedq;
+ skb_queue_head_init(l_ptr->inputq);
link_reset_statistics(l_ptr);
tipc_node_attach_link(n_ptr, l_ptr);
setup_timer(&l_ptr->timer, link_timeout, (unsigned long)l_ptr);
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);
* @link: congested link
* @list: message that was attempted sent
* Create pseudo msg to send back to user when congestion abates
- * Only consumes message if there is an error
+ * Does not consume buffer list
*/
static int link_schedule_user(struct tipc_link *link, struct sk_buff_head *list)
{
if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) {
pr_warn("%s<%s>, send queue full", link_rst_msg, link->name);
tipc_link_reset(link);
- goto err;
+ return -ENOBUFS;
}
/* Non-blocking sender: */
if (TIPC_SKB_CB(skb_peek(list))->wakeup_pending)
skb = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0,
addr, addr, oport, 0, 0);
if (!skb)
- goto err;
+ return -ENOBUFS;
TIPC_SKB_CB(skb)->chain_sz = skb_queue_len(list);
TIPC_SKB_CB(skb)->chain_imp = imp;
skb_queue_tail(&link->wakeupq, skb);
link->stats.link_congs++;
return -ELINKCONG;
-err:
- __skb_queue_purge(list);
- return -ENOBUFS;
}
/**
if ((pnd[imp] + l->backlog[imp].len) >= lim)
break;
skb_unlink(skb, &l->wakeupq);
- skb_queue_tail(&l->inputq, skb);
- l->owner->inputq = &l->inputq;
+ skb_queue_tail(l->inputq, skb);
+ l->owner->inputq = l->inputq;
l->owner->action_flags |= TIPC_MSG_EVT;
}
}
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)) {
__skb_queue_purge(&l_ptr->transmq);
__skb_queue_purge(&l_ptr->deferdq);
if (!owner->inputq)
- owner->inputq = &l_ptr->inputq;
+ owner->inputq = l_ptr->inputq;
skb_queue_splice_init(&l_ptr->wakeupq, owner->inputq);
if (!skb_queue_empty(owner->inputq))
owner->action_flags |= TIPC_MSG_EVT;
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);
}
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;
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;
* @link: link to use
* @list: chain of buffers containing message
*
- * Consumes the buffer chain, except when returning -ELINKCONG,
- * since the caller then may want to make more send attempts.
+ * Consumes the buffer chain, except when returning an error code,
* Returns 0 if success, or errno: -ELINKCONG, -EMSGSIZE or -ENOBUFS
* Messages at TIPC_SYSTEM_IMPORTANCE are always accepted
*/
if (unlikely(link->backlog[i].len >= link->backlog[i].limit))
return link_schedule_user(link, list);
}
- if (unlikely(msg_size(msg) > mtu)) {
- __skb_queue_purge(list);
+ if (unlikely(msg_size(msg) > mtu))
return -EMSGSIZE;
- }
+
/* Prepare each packet for sending, and add to relevant queue: */
while (skb_queue_len(list)) {
skb = skb_peek(list);
/* tipc_link_xmit_skb(): send single buffer to destination
* Buffers sent via this functon are generally TIPC_SYSTEM_IMPORTANCE
- * messages, which will not be rejected
+ * messages, which will not cause link congestion
* The only exception is datagram messages rerouted after secondary
* lookup, which are rare and safe to dispose of anyway.
* TODO: Return real return value, and let callers use
skb2list(skb, &head);
rc = tipc_link_xmit(net, &head, dnode, selector);
- if (rc == -ELINKCONG)
+ if (rc)
kfree_skb(skb);
return 0;
}
* @dsz: amount of user data to be sent
* @dnode: address of destination node
* @selector: a number used for deterministic link selection
- * Consumes the buffer chain, except when returning -ELINKCONG
+ * Consumes the buffer chain, except when returning error
* Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE
*/
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);
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);
}
}
/* Is it still in the input queue ? */
post_synch = mod(pl->rcv_nxt - l->synch_point) - 1;
- if (skb_queue_len(&pl->inputq) > post_synch)
+ if (skb_queue_len(pl->inputq) > post_synch)
return false;
synched:
l->flags &= ~LINK_SYNCHING;
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;
case TIPC_HIGH_IMPORTANCE:
case TIPC_CRITICAL_IMPORTANCE:
case CONN_MANAGER:
- if (tipc_skb_queue_tail(&link->inputq, skb, dport)) {
- node->inputq = &link->inputq;
+ if (tipc_skb_queue_tail(link->inputq, skb, dport)) {
+ node->inputq = link->inputq;
node->action_flags |= TIPC_MSG_EVT;
}
return true;
case NAME_DISTRIBUTOR:
node->bclink.recv_permitted = true;
- node->namedq = &link->namedq;
- skb_queue_tail(&link->namedq, skb);
- if (skb_queue_len(&link->namedq) == 1)
+ node->namedq = link->namedq;
+ skb_queue_tail(link->namedq, skb);
+ if (skb_queue_len(link->namedq) == 1)
node->action_flags |= TIPC_NAMED_MSG_EVT;
return true;
case MSG_BUNDLER:
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;
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;
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);
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);
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;
tipc_node_lock(node);
- link = node->links[bearer_id];
+ link = node->links[bearer_id].link;
if (!link) {
res = -EINVAL;
goto out;
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;
}
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);
tipc_node_lock(node);
- link = node->links[bearer_id];
+ link = node->links[bearer_id].link;
if (!link) {
tipc_node_unlock(node);
return -EINVAL;
projects / cascardo / linux.git / blobdiff