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-rw-r--r--net/tipc/discover.c6
-rw-r--r--net/tipc/link.c33
-rw-r--r--net/tipc/node.c11
-rw-r--r--net/tipc/node.h10
4 files changed, 42 insertions, 18 deletions
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 0987933155b9..f2fb96e86ee8 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -159,12 +159,6 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr)
}
tipc_node_lock(n_ptr);
- /* Don't talk to neighbor during cleanup after last session */
- if (n_ptr->cleanup_required) {
- tipc_node_unlock(n_ptr);
- return;
- }
-
link = n_ptr->links[b_ptr->identity];
/* Create a link endpoint for this bearer, if necessary */
diff --git a/net/tipc/link.c b/net/tipc/link.c
index bc655f456495..74126db45972 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1669,17 +1669,24 @@ 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;
}
@@ -1914,6 +1921,12 @@ 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));
@@ -2045,6 +2058,16 @@ static void link_recv_proto_msg(struct link *l_ptr, struct sk_buff *buf)
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 */
diff --git a/net/tipc/node.c b/net/tipc/node.c
index d75432f5e726..27b4bb0cca6c 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -112,6 +112,7 @@ struct tipc_node *tipc_node_create(u32 addr)
break;
}
list_add_tail(&n_ptr->list, &temp_node->list);
+ n_ptr->block_setup = WAIT_PEER_DOWN;
tipc_num_nodes++;
@@ -312,7 +313,7 @@ static void node_established_contact(struct tipc_node *n_ptr)
}
}
-static void node_cleanup_finished(unsigned long node_addr)
+static void node_name_purge_complete(unsigned long node_addr)
{
struct tipc_node *n_ptr;
@@ -320,7 +321,7 @@ static void node_cleanup_finished(unsigned long node_addr)
n_ptr = tipc_node_find(node_addr);
if (n_ptr) {
tipc_node_lock(n_ptr);
- n_ptr->cleanup_required = 0;
+ n_ptr->block_setup &= ~WAIT_NAMES_GONE;
tipc_node_unlock(n_ptr);
}
read_unlock_bh(&tipc_net_lock);
@@ -371,10 +372,10 @@ static void node_lost_contact(struct tipc_node *n_ptr)
/* Notify subscribers */
tipc_nodesub_notify(n_ptr);
- /* Prevent re-contact with node until all cleanup is done */
+ /* Prevent re-contact with node until cleanup is done */
- n_ptr->cleanup_required = 1;
- tipc_k_signal((Handler)node_cleanup_finished, n_ptr->addr);
+ n_ptr->block_setup = WAIT_PEER_DOWN | WAIT_NAMES_GONE;
+ tipc_k_signal((Handler)node_name_purge_complete, n_ptr->addr);
}
struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 5c61afc7a0b9..4f15cb40aaa4 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -42,6 +42,12 @@
#include "net.h"
#include "bearer.h"
+/* Flags used to block (re)establishment of contact with a neighboring node */
+
+#define WAIT_PEER_DOWN 0x0001 /* wait to see that peer's links are down */
+#define WAIT_NAMES_GONE 0x0002 /* wait for peer's publications to be purged */
+#define WAIT_NODE_DOWN 0x0004 /* wait until peer node is declared down */
+
/**
* struct tipc_node - TIPC node structure
* @addr: network address of node
@@ -52,7 +58,7 @@
* @active_links: pointers to active links to node
* @links: pointers to all links to node
* @working_links: number of working links to node (both active and standby)
- * @cleanup_required: non-zero if cleaning up after a prior loss of contact
+ * @block_setup: bit mask of conditions preventing link establishment to node
* @link_cnt: number of links to node
* @permit_changeover: non-zero if node has redundant links to this system
* @bclink: broadcast-related info
@@ -77,7 +83,7 @@ struct tipc_node {
struct link *links[MAX_BEARERS];
int link_cnt;
int working_links;
- int cleanup_required;
+ int block_setup;
int permit_changeover;
struct {
int supported;