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Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c111
1 files changed, 80 insertions, 31 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index f89570c54f5..ae98a72da11 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -332,15 +332,16 @@ struct link *tipc_link_create(struct tipc_node *n_ptr,
l_ptr->addr = peer;
if_name = strchr(b_ptr->name, ':') + 1;
- sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:",
+ sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown",
tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
tipc_node(tipc_own_addr),
if_name,
tipc_zone(peer), tipc_cluster(peer), tipc_node(peer));
- /* note: peer i/f is appended to link name by reset/activate */
+ /* note: peer i/f name is updated by reset/activate message */
memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr));
l_ptr->owner = n_ptr;
l_ptr->checkpoint = 1;
+ l_ptr->peer_session = INVALID_SESSION;
l_ptr->b_ptr = b_ptr;
link_set_supervision_props(l_ptr, b_ptr->media->tolerance);
l_ptr->state = RESET_UNKNOWN;
@@ -536,9 +537,6 @@ void tipc_link_stop(struct link *l_ptr)
l_ptr->proto_msg_queue = NULL;
}
-/* LINK EVENT CODE IS NOT SUPPORTED AT PRESENT */
-#define link_send_event(fcn, l_ptr, up) do { } while (0)
-
void tipc_link_reset(struct link *l_ptr)
{
struct sk_buff *buf;
@@ -596,10 +594,6 @@ void tipc_link_reset(struct link *l_ptr)
l_ptr->fsm_msg_cnt = 0;
l_ptr->stale_count = 0;
link_reset_statistics(l_ptr);
-
- link_send_event(tipc_cfg_link_event, l_ptr, 0);
- if (!in_own_cluster(l_ptr->addr))
- link_send_event(tipc_disc_link_event, l_ptr, 0);
}
@@ -608,9 +602,6 @@ static void link_activate(struct link *l_ptr)
l_ptr->next_in_no = l_ptr->stats.recv_info = 1;
tipc_node_link_up(l_ptr->owner, l_ptr);
tipc_bearer_add_dest(l_ptr->b_ptr, l_ptr->addr);
- link_send_event(tipc_cfg_link_event, l_ptr, 1);
- if (!in_own_cluster(l_ptr->addr))
- link_send_event(tipc_disc_link_event, l_ptr, 1);
}
/**
@@ -985,6 +976,51 @@ int tipc_link_send(struct sk_buff *buf, u32 dest, u32 selector)
}
/*
+ * tipc_link_send_names - send name table entries to new neighbor
+ *
+ * Send routine for bulk delivery of name table messages when contact
+ * with a new neighbor occurs. No link congestion checking is performed
+ * because name table messages *must* be delivered. The messages must be
+ * small enough not to require fragmentation.
+ * Called without any locks held.
+ */
+
+void tipc_link_send_names(struct list_head *message_list, u32 dest)
+{
+ struct tipc_node *n_ptr;
+ struct link *l_ptr;
+ struct sk_buff *buf;
+ struct sk_buff *temp_buf;
+
+ if (list_empty(message_list))
+ return;
+
+ read_lock_bh(&tipc_net_lock);
+ n_ptr = tipc_node_find(dest);
+ if (n_ptr) {
+ tipc_node_lock(n_ptr);
+ l_ptr = n_ptr->active_links[0];
+ if (l_ptr) {
+ /* convert circular list to linear list */
+ ((struct sk_buff *)message_list->prev)->next = NULL;
+ link_add_chain_to_outqueue(l_ptr,
+ (struct sk_buff *)message_list->next, 0);
+ tipc_link_push_queue(l_ptr);
+ INIT_LIST_HEAD(message_list);
+ }
+ tipc_node_unlock(n_ptr);
+ }
+ read_unlock_bh(&tipc_net_lock);
+
+ /* discard the messages if they couldn't be sent */
+
+ list_for_each_safe(buf, temp_buf, ((struct sk_buff *)message_list)) {
+ list_del((struct list_head *)buf);
+ buf_discard(buf);
+ }
+}
+
+/*
* link_send_buf_fast: Entry for data messages where the
* destination link is known and the header is complete,
* inclusive total message length. Very time critical.
@@ -1031,9 +1067,6 @@ int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode)
u32 selector = msg_origport(buf_msg(buf)) & 1;
u32 dummy;
- if (destnode == tipc_own_addr)
- return tipc_port_recv_msg(buf);
-
read_lock_bh(&tipc_net_lock);
n_ptr = tipc_node_find(destnode);
if (likely(n_ptr)) {
@@ -1658,19 +1691,12 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *b_ptr)
continue;
}
+ /* Discard unicast link messages destined for another node */
+
if (unlikely(!msg_short(msg) &&
(msg_destnode(msg) != tipc_own_addr)))
goto cont;
- /* Discard non-routeable messages destined for another node */
-
- if (unlikely(!msg_isdata(msg) &&
- (msg_destnode(msg) != tipc_own_addr))) {
- if ((msg_user(msg) != CONN_MANAGER) &&
- (msg_user(msg) != MSG_FRAGMENTER))
- goto cont;
- }
-
/* Locate neighboring node that sent message */
n_ptr = tipc_node_find(msg_prevnode(msg));
@@ -1678,17 +1704,24 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *b_ptr)
goto cont;
tipc_node_lock(n_ptr);
- /* Don't talk to neighbor during cleanup after last session */
+ /* Locate unicast link endpoint that should handle message */
- if (n_ptr->cleanup_required) {
+ l_ptr = n_ptr->links[b_ptr->identity];
+ if (unlikely(!l_ptr)) {
tipc_node_unlock(n_ptr);
goto cont;
}
- /* Locate unicast link endpoint that should handle message */
+ /* Verify that communication with node is currently allowed */
- l_ptr = n_ptr->links[b_ptr->identity];
- if (unlikely(!l_ptr)) {
+ if ((n_ptr->block_setup & WAIT_PEER_DOWN) &&
+ msg_user(msg) == LINK_PROTOCOL &&
+ (msg_type(msg) == RESET_MSG ||
+ msg_type(msg) == ACTIVATE_MSG) &&
+ !msg_redundant_link(msg))
+ n_ptr->block_setup &= ~WAIT_PEER_DOWN;
+
+ if (n_ptr->block_setup) {
tipc_node_unlock(n_ptr);
goto cont;
}
@@ -1923,6 +1956,12 @@ void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
if (link_blocked(l_ptr))
return;
+
+ /* Abort non-RESET send if communication with node is prohibited */
+
+ if ((l_ptr->owner->block_setup) && (msg_typ != RESET_MSG))
+ return;
+
msg_set_type(msg, msg_typ);
msg_set_net_plane(msg, l_ptr->b_ptr->net_plane);
msg_set_bcast_ack(msg, mod(l_ptr->owner->bclink.last_in));
@@ -2051,9 +2090,19 @@ static void link_recv_proto_msg(struct link *l_ptr, struct sk_buff *buf)
case RESET_MSG:
if (!link_working_unknown(l_ptr) &&
(l_ptr->peer_session != INVALID_SESSION)) {
- if (msg_session(msg) == l_ptr->peer_session)
- break; /* duplicate: ignore */
+ if (less_eq(msg_session(msg), l_ptr->peer_session))
+ break; /* duplicate or old reset: ignore */
+ }
+
+ if (!msg_redundant_link(msg) && (link_working_working(l_ptr) ||
+ link_working_unknown(l_ptr))) {
+ /*
+ * peer has lost contact -- don't allow peer's links
+ * to reactivate before we recognize loss & clean up
+ */
+ l_ptr->owner->block_setup = WAIT_NODE_DOWN;
}
+
/* fall thru' */
case ACTIVATE_MSG:
/* Update link settings according other endpoint's values */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-04 19:43:58 +0000