/*
* net/tipc/node.c: TIPC node management routines
- *
+ *
* Copyright (c) 2000-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
{
struct cluster *c_ptr;
struct node *n_ptr;
- struct node **curr_node;
+ struct node **curr_node;
- n_ptr = kmalloc(sizeof(*n_ptr),GFP_ATOMIC);
+ n_ptr = kzalloc(sizeof(*n_ptr),GFP_ATOMIC);
if (!n_ptr) {
warn("Node creation failed, no memory\n");
return NULL;
kfree(n_ptr);
return NULL;
}
-
- memset(n_ptr, 0, sizeof(*n_ptr));
+
n_ptr->addr = addr;
- spin_lock_init(&n_ptr->lock);
+ spin_lock_init(&n_ptr->lock);
INIT_LIST_HEAD(&n_ptr->nsub);
n_ptr->owner = c_ptr;
tipc_cltr_attach_node(c_ptr, n_ptr);
n_ptr->last_router = -1;
/* Insert node into ordered list */
- for (curr_node = &tipc_nodes; *curr_node;
+ for (curr_node = &tipc_nodes; *curr_node;
curr_node = &(*curr_node)->next) {
if (addr < (*curr_node)->addr) {
n_ptr->next = *curr_node;
/**
* tipc_node_link_up - handle addition of link
- *
+ *
* Link becomes active (alone or shared) or standby, depending on its priority.
*/
info("Established link <%s> on network plane %c\n",
l_ptr->name, l_ptr->b_ptr->net_plane);
-
+
if (!active[0]) {
dbg(" link %x into %x/%x\n", l_ptr, &active[0], &active[1]);
active[0] = active[1] = l_ptr;
node_established_contact(n_ptr);
return;
}
- if (l_ptr->priority < active[0]->priority) {
+ if (l_ptr->priority < active[0]->priority) {
info("New link <%s> becomes standby\n", l_ptr->name);
return;
}
tipc_link_send_duplicate(active[0], l_ptr);
- if (l_ptr->priority == active[0]->priority) {
+ if (l_ptr->priority == active[0]->priority) {
active[0] = l_ptr;
return;
}
u32 i;
u32 highest_prio = 0;
- active[0] = active[1] = NULL;
+ active[0] = active[1] = NULL;
for (i = 0; i < MAX_BEARERS; i++) {
- struct link *l_ptr = n_ptr->links[i];
+ struct link *l_ptr = n_ptr->links[i];
if (!l_ptr || !tipc_link_is_up(l_ptr) ||
(l_ptr->priority < highest_prio))
continue;
if (l_ptr->priority > highest_prio) {
- highest_prio = l_ptr->priority;
+ highest_prio = l_ptr->priority;
active[0] = active[1] = l_ptr;
} else {
active[1] = l_ptr;
active[1] = active[0];
if (active[0] == l_ptr)
node_select_active_links(n_ptr);
- if (tipc_node_is_up(n_ptr))
+ if (tipc_node_is_up(n_ptr))
tipc_link_changeover(l_ptr);
- else
+ else
node_lost_contact(n_ptr);
}
int tipc_node_has_active_links(struct node *n_ptr)
{
- return (n_ptr &&
+ return (n_ptr &&
((n_ptr->active_links[0]) || (n_ptr->active_links[1])));
}
if (!n_ptr)
n_ptr = tipc_node_create(l_ptr->addr);
- if (n_ptr) {
+ if (n_ptr) {
u32 bearer_id = l_ptr->b_ptr->identity;
char addr_string[16];
- if (n_ptr->link_cnt >= 2) {
- char addr_string[16];
-
- err("Attempt to create third link to %s\n",
+ if (n_ptr->link_cnt >= 2) {
+ err("Attempt to create third link to %s\n",
addr_string_fill(addr_string, n_ptr->addr));
- return NULL;
- }
-
- if (!n_ptr->links[bearer_id]) {
- n_ptr->links[bearer_id] = l_ptr;
- tipc_net.zones[tipc_zone(l_ptr->addr)]->links++;
- n_ptr->link_cnt++;
- return n_ptr;
- }
- err("Attempt to establish second link on <%s> to %s \n",
- l_ptr->b_ptr->publ.name,
+ return NULL;
+ }
+
+ if (!n_ptr->links[bearer_id]) {
+ n_ptr->links[bearer_id] = l_ptr;
+ tipc_net.zones[tipc_zone(l_ptr->addr)]->links++;
+ n_ptr->link_cnt++;
+ return n_ptr;
+ }
+ err("Attempt to establish second link on <%s> to %s \n",
+ l_ptr->b_ptr->publ.name,
addr_string_fill(addr_string, l_ptr->addr));
- }
+ }
return NULL;
}
* Routing table management - five cases to handle:
*
* 1: A link towards a zone/cluster external node comes up.
- * => Send a multicast message updating routing tables of all
- * system nodes within own cluster that the new destination
- * can be reached via this node.
+ * => Send a multicast message updating routing tables of all
+ * system nodes within own cluster that the new destination
+ * can be reached via this node.
* (node.establishedContact()=>cluster.multicastNewRoute())
*
* 2: A link towards a slave node comes up.
- * => Send a multicast message updating routing tables of all
- * system nodes within own cluster that the new destination
- * can be reached via this node.
+ * => Send a multicast message updating routing tables of all
+ * system nodes within own cluster that the new destination
+ * can be reached via this node.
* (node.establishedContact()=>cluster.multicastNewRoute())
- * => Send a message to the slave node about existence
+ * => Send a message to the slave node about existence
* of all system nodes within cluster:
* (node.establishedContact()=>cluster.sendLocalRoutes())
*
* nodes which can be reached via this node.
* (node.establishedContact()==>network.sendExternalRoutes())
* (node.establishedContact()==>network.sendSlaveRoutes())
- * => Send messages to all directly connected slave nodes
+ * => Send messages to all directly connected slave nodes
* containing information about the existence of the new node
* (node.establishedContact()=>cluster.multicastNewRoute())
- *
+ *
* 4: The link towards a zone/cluster external node or slave
* node goes down.
- * => Send a multcast message updating routing tables of all
+ * => Send a multcast message updating routing tables of all
* nodes within cluster that the new destination can not any
* longer be reached via this node.
* (node.lostAllLinks()=>cluster.bcastLostRoute())
* routing tables. Note: This is a completely node
* local operation.
* (node.lostAllLinks()=>network.removeAsRouter())
- * => Send messages to all directly connected slave nodes
+ * => Send messages to all directly connected slave nodes
* containing information about loss of the node
* (node.establishedContact()=>cluster.multicastLostRoute())
*
struct cluster *c_ptr;
dbg("node_established_contact:-> %x\n", n_ptr->addr);
- if (!tipc_node_has_active_routes(n_ptr) && in_own_cluster(n_ptr->addr)) {
+ if (!tipc_node_has_active_routes(n_ptr) && in_own_cluster(n_ptr->addr)) {
tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
}
- /* Syncronize broadcast acks */
- n_ptr->bclink.acked = tipc_bclink_get_last_sent();
+ /* Syncronize broadcast acks */
+ n_ptr->bclink.acked = tipc_bclink_get_last_sent();
if (is_slave(tipc_own_addr))
return;
c_ptr = tipc_cltr_find(tipc_own_addr);
if (!c_ptr)
c_ptr = tipc_cltr_create(tipc_own_addr);
- if (c_ptr)
- tipc_cltr_bcast_new_route(c_ptr, n_ptr->addr, 1,
+ if (c_ptr)
+ tipc_cltr_bcast_new_route(c_ptr, n_ptr->addr, 1,
tipc_max_nodes);
return;
- }
+ }
c_ptr = n_ptr->owner;
if (is_slave(n_ptr->addr)) {
char addr_string[16];
u32 i;
- /* Clean up broadcast reception remains */
- n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
- while (n_ptr->bclink.deferred_head) {
- struct sk_buff* buf = n_ptr->bclink.deferred_head;
- n_ptr->bclink.deferred_head = buf->next;
- buf_discard(buf);
- }
- if (n_ptr->bclink.defragm) {
- buf_discard(n_ptr->bclink.defragm);
- n_ptr->bclink.defragm = NULL;
- }
- if (in_own_cluster(n_ptr->addr) && n_ptr->bclink.supported) {
- tipc_bclink_acknowledge(n_ptr, mod(n_ptr->bclink.acked + 10000));
- }
-
- /* Update routing tables */
+ /* Clean up broadcast reception remains */
+ n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
+ while (n_ptr->bclink.deferred_head) {
+ struct sk_buff* buf = n_ptr->bclink.deferred_head;
+ n_ptr->bclink.deferred_head = buf->next;
+ buf_discard(buf);
+ }
+ if (n_ptr->bclink.defragm) {
+ buf_discard(n_ptr->bclink.defragm);
+ n_ptr->bclink.defragm = NULL;
+ }
+ if (in_own_cluster(n_ptr->addr) && n_ptr->bclink.supported) {
+ tipc_bclink_acknowledge(n_ptr, mod(n_ptr->bclink.acked + 10000));
+ }
+
+ /* Update routing tables */
if (is_slave(tipc_own_addr)) {
tipc_net_remove_as_router(n_ptr->addr);
} else {
- if (!in_own_cluster(n_ptr->addr)) {
+ if (!in_own_cluster(n_ptr->addr)) {
/* Case 4 (see above) */
c_ptr = tipc_cltr_find(tipc_own_addr);
tipc_cltr_bcast_lost_route(c_ptr, n_ptr->addr, 1,
tipc_max_nodes);
} else {
if (n_ptr->bclink.supported) {
- tipc_nmap_remove(&tipc_cltr_bcast_nodes,
+ tipc_nmap_remove(&tipc_cltr_bcast_nodes,
n_ptr->addr);
if (n_ptr->addr < tipc_own_addr)
tipc_own_tag--;
if (tipc_node_has_active_routes(n_ptr))
return;
- info("Lost contact with %s\n",
+ info("Lost contact with %s\n",
addr_string_fill(addr_string, n_ptr->addr));
/* Abort link changeover */
for (i = 0; i < MAX_BEARERS; i++) {
struct link *l_ptr = n_ptr->links[i];
- if (!l_ptr)
+ if (!l_ptr)
continue;
l_ptr->reset_checkpoint = l_ptr->next_in_no;
l_ptr->exp_msg_count = 0;
/* Notify subscribers */
list_for_each_entry_safe(ns, tns, &n_ptr->nsub, nodesub_list) {
- ns->node = NULL;
+ ns->node = NULL;
list_del_init(&ns->nodesub_list);
tipc_k_signal((Handler)ns->handle_node_down,
(unsigned long)ns->usr_handle);
/**
* tipc_node_select_next_hop - find the next-hop node for a message
- *
+ *
* Called by when cluster local lookup has failed.
*/
struct node *n_ptr;
u32 router_addr;
- if (!tipc_addr_domain_valid(addr))
- return NULL;
+ if (!tipc_addr_domain_valid(addr))
+ return NULL;
/* Look for direct link to destination processsor */
n_ptr = tipc_node_find(addr);
if (n_ptr && tipc_node_has_active_links(n_ptr))
- return n_ptr;
+ return n_ptr;
/* Cluster local system nodes *must* have direct links */
if (!is_slave(addr) && in_own_cluster(addr))
/* Look for cluster local router with direct link to node */
router_addr = tipc_node_select_router(n_ptr, selector);
- if (router_addr)
- return tipc_node_select(router_addr, selector);
+ if (router_addr)
+ return tipc_node_select(router_addr, selector);
- /* Slave nodes can only be accessed within own cluster via a
+ /* Slave nodes can only be accessed within own cluster via a
known router with direct link -- if no router was found,give up */
if (is_slave(addr))
return NULL;
addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
n_ptr = tipc_net_select_remote_node(addr, selector);
if (n_ptr && tipc_node_has_active_links(n_ptr))
- return n_ptr;
+ return n_ptr;
/* Last resort -- look for any router to anywhere in remote zone */
router_addr = tipc_net_select_router(addr, selector);
- if (router_addr)
- return tipc_node_select(router_addr, selector);
+ if (router_addr)
+ return tipc_node_select(router_addr, selector);
- return NULL;
+ return NULL;
}
/**
* tipc_node_select_router - select router to reach specified node
- *
- * Uses a deterministic and fair algorithm for selecting router node.
+ *
+ * Uses a deterministic and fair algorithm for selecting router node.
*/
u32 tipc_node_select_router(struct node *n_ptr, u32 ref)
u32 start;
u32 r;
- if (!n_ptr)
- return 0;
+ if (!n_ptr)
+ return 0;
if (n_ptr->last_router < 0)
return 0;
{
u32 r_num = tipc_node(router);
- n_ptr->routers[r_num / 32] =
+ n_ptr->routers[r_num / 32] =
((1 << (r_num % 32)) | n_ptr->routers[r_num / 32]);
n_ptr->last_router = tipc_max_nodes / 32;
- while ((--n_ptr->last_router >= 0) &&
+ while ((--n_ptr->last_router >= 0) &&
!n_ptr->routers[n_ptr->last_router]);
}
n_ptr->routers[r_num / 32] =
((~(1 << (r_num % 32))) & (n_ptr->routers[r_num / 32]));
n_ptr->last_router = tipc_max_nodes / 32;
- while ((--n_ptr->last_router >= 0) &&
+ while ((--n_ptr->last_router >= 0) &&
!n_ptr->routers[n_ptr->last_router]);
if (!tipc_node_is_up(n_ptr))
tipc_printf(buf, "\n\n%s", str);
for (i = 0; i < MAX_BEARERS; i++) {
- if (!n_ptr->links[i])
+ if (!n_ptr->links[i])
continue;
tipc_printf(buf, "Links[%u]: %x, ", i, n_ptr->links[i]);
}
u32 domain;
struct sk_buff *buf;
struct node *n_ptr;
- struct tipc_node_info node_info;
+ struct tipc_node_info node_info;
+ u32 payload_size;
if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
- domain = *(u32 *)TLV_DATA(req_tlv_area);
- domain = ntohl(domain);
+ domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
if (!tipc_addr_domain_valid(domain))
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
" (network address)");
- if (!tipc_nodes)
- return tipc_cfg_reply_none();
+ if (!tipc_nodes)
+ return tipc_cfg_reply_none();
- /* For now, get space for all other nodes
+ /* For now, get space for all other nodes
(will need to modify this when slave nodes are supported */
- buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(node_info)) *
- (tipc_max_nodes - 1));
+ payload_size = TLV_SPACE(sizeof(node_info)) * (tipc_max_nodes - 1);
+ if (payload_size > 32768u)
+ return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
+ " (too many nodes)");
+ buf = tipc_cfg_reply_alloc(payload_size);
if (!buf)
return NULL;
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
if (!in_scope(domain, n_ptr->addr))
continue;
- node_info.addr = htonl(n_ptr->addr);
- node_info.up = htonl(tipc_node_is_up(n_ptr));
- tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO,
+ node_info.addr = htonl(n_ptr->addr);
+ node_info.up = htonl(tipc_node_is_up(n_ptr));
+ tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO,
&node_info, sizeof(node_info));
}
u32 domain;
struct sk_buff *buf;
struct node *n_ptr;
- struct tipc_link_info link_info;
+ struct tipc_link_info link_info;
+ u32 payload_size;
if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
- domain = *(u32 *)TLV_DATA(req_tlv_area);
- domain = ntohl(domain);
+ domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
if (!tipc_addr_domain_valid(domain))
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
" (network address)");
- if (!tipc_nodes)
- return tipc_cfg_reply_none();
+ if (tipc_mode != TIPC_NET_MODE)
+ return tipc_cfg_reply_none();
- /* For now, get space for 2 links to all other nodes + bcast link
- (will need to modify this when slave nodes are supported */
+ /* Get space for all unicast links + multicast link */
- buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(link_info)) *
- (2 * (tipc_max_nodes - 1) + 1));
+ payload_size = TLV_SPACE(sizeof(link_info)) *
+ (tipc_net.zones[tipc_zone(tipc_own_addr)]->links + 1);
+ if (payload_size > 32768u)
+ return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
+ " (too many links)");
+ buf = tipc_cfg_reply_alloc(payload_size);
if (!buf)
return NULL;
/* Add TLV for broadcast link */
- link_info.dest = tipc_own_addr & 0xfffff00;
- link_info.dest = htonl(link_info.dest);
- link_info.up = htonl(1);
- sprintf(link_info.str, tipc_bclink_name);
+ link_info.dest = htonl(tipc_own_addr & 0xfffff00);
+ link_info.up = htonl(1);
+ sprintf(link_info.str, tipc_bclink_name);
tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info));
/* Add TLVs for any other links in scope */
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
- u32 i;
+ u32 i;
if (!in_scope(domain, n_ptr->addr))
continue;
- for (i = 0; i < MAX_BEARERS; i++) {
- if (!n_ptr->links[i])
- continue;
- link_info.dest = htonl(n_ptr->addr);
- link_info.up = htonl(tipc_link_is_up(n_ptr->links[i]));
- strcpy(link_info.str, n_ptr->links[i]->name);
- tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO,
+ for (i = 0; i < MAX_BEARERS; i++) {
+ if (!n_ptr->links[i])
+ continue;
+ link_info.dest = htonl(n_ptr->addr);
+ link_info.up = htonl(tipc_link_is_up(n_ptr->links[i]));
+ strcpy(link_info.str, n_ptr->links[i]->name);
+ tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO,
&link_info, sizeof(link_info));
- }
+ }
}
return buf;
projects / linux-2.6 / blobdiff