aboutsummaryrefslogtreecommitdiffstats
path: root/net/tipc/link.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c130
1 files changed, 70 insertions, 60 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 18702f5..43639ff 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2,7 +2,7 @@
* net/tipc/link.c: TIPC link code
*
* Copyright (c) 1996-2007, Ericsson AB
- * Copyright (c) 2004-2007, Wind River Systems
+ * Copyright (c) 2004-2007, 2010-2011, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -90,7 +90,7 @@ static void link_handle_out_of_seq_msg(struct link *l_ptr,
static void link_recv_proto_msg(struct link *l_ptr, struct sk_buff *buf);
static int link_recv_changeover_msg(struct link **l_ptr, struct sk_buff **buf);
static void link_set_supervision_props(struct link *l_ptr, u32 tolerance);
-static int link_send_sections_long(struct port *sender,
+static int link_send_sections_long(struct tipc_port *sender,
struct iovec const *msg_sect,
u32 num_sect, u32 destnode);
static void link_check_defragm_bufs(struct link *l_ptr);
@@ -113,7 +113,7 @@ static void link_init_max_pkt(struct link *l_ptr)
{
u32 max_pkt;
- max_pkt = (l_ptr->b_ptr->publ.mtu & ~3);
+ max_pkt = (l_ptr->b_ptr->mtu & ~3);
if (max_pkt > MAX_MSG_SIZE)
max_pkt = MAX_MSG_SIZE;
@@ -246,9 +246,6 @@ static void link_timeout(struct link *l_ptr)
l_ptr->stats.accu_queue_sz += l_ptr->out_queue_size;
l_ptr->stats.queue_sz_counts++;
- if (l_ptr->out_queue_size > l_ptr->stats.max_queue_sz)
- l_ptr->stats.max_queue_sz = l_ptr->out_queue_size;
-
if (l_ptr->first_out) {
struct tipc_msg *msg = buf_msg(l_ptr->first_out);
u32 length = msg_size(msg);
@@ -296,19 +293,35 @@ static void link_set_timer(struct link *l_ptr, u32 time)
/**
* tipc_link_create - create a new link
+ * @n_ptr: pointer to associated node
* @b_ptr: pointer to associated bearer
- * @peer: network address of node at other end of link
* @media_addr: media address to use when sending messages over link
*
* Returns pointer to link.
*/
-struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer,
+struct link *tipc_link_create(struct tipc_node *n_ptr,
+ struct tipc_bearer *b_ptr,
const struct tipc_media_addr *media_addr)
{
struct link *l_ptr;
struct tipc_msg *msg;
char *if_name;
+ char addr_string[16];
+ u32 peer = n_ptr->addr;
+
+ if (n_ptr->link_cnt >= 2) {
+ tipc_addr_string_fill(addr_string, n_ptr->addr);
+ err("Attempt to establish third link to %s\n", addr_string);
+ return NULL;
+ }
+
+ if (n_ptr->links[b_ptr->identity]) {
+ tipc_addr_string_fill(addr_string, n_ptr->addr);
+ err("Attempt to establish second link on <%s> to %s\n",
+ b_ptr->name, addr_string);
+ return NULL;
+ }
l_ptr = kzalloc(sizeof(*l_ptr), GFP_ATOMIC);
if (!l_ptr) {
@@ -317,7 +330,7 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer,
}
l_ptr->addr = peer;
- if_name = strchr(b_ptr->publ.name, ':') + 1;
+ if_name = strchr(b_ptr->name, ':') + 1;
sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:",
tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
tipc_node(tipc_own_addr),
@@ -325,6 +338,7 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer,
tipc_zone(peer), tipc_cluster(peer), tipc_node(peer));
/* note: peer i/f is appended to link name by reset/activate */
memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr));
+ l_ptr->owner = n_ptr;
l_ptr->checkpoint = 1;
l_ptr->b_ptr = b_ptr;
link_set_supervision_props(l_ptr, b_ptr->media->tolerance);
@@ -348,11 +362,7 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer,
link_reset_statistics(l_ptr);
- l_ptr->owner = tipc_node_attach_link(l_ptr);
- if (!l_ptr->owner) {
- kfree(l_ptr);
- return NULL;
- }
+ tipc_node_attach_link(n_ptr, l_ptr);
k_init_timer(&l_ptr->timer, (Handler)link_timeout, (unsigned long)l_ptr);
list_add_tail(&l_ptr->link_list, &b_ptr->links);
@@ -391,7 +401,9 @@ void tipc_link_delete(struct link *l_ptr)
static void link_start(struct link *l_ptr)
{
+ tipc_node_lock(l_ptr->owner);
link_state_event(l_ptr, STARTING_EVT);
+ tipc_node_unlock(l_ptr->owner);
}
/**
@@ -406,7 +418,7 @@ static void link_start(struct link *l_ptr)
static int link_schedule_port(struct link *l_ptr, u32 origport, u32 sz)
{
- struct port *p_ptr;
+ struct tipc_port *p_ptr;
spin_lock_bh(&tipc_port_list_lock);
p_ptr = tipc_port_lock(origport);
@@ -415,7 +427,7 @@ static int link_schedule_port(struct link *l_ptr, u32 origport, u32 sz)
goto exit;
if (!list_empty(&p_ptr->wait_list))
goto exit;
- p_ptr->publ.congested = 1;
+ p_ptr->congested = 1;
p_ptr->waiting_pkts = 1 + ((sz - 1) / l_ptr->max_pkt);
list_add_tail(&p_ptr->wait_list, &l_ptr->waiting_ports);
l_ptr->stats.link_congs++;
@@ -428,8 +440,8 @@ exit:
void tipc_link_wakeup_ports(struct link *l_ptr, int all)
{
- struct port *p_ptr;
- struct port *temp_p_ptr;
+ struct tipc_port *p_ptr;
+ struct tipc_port *temp_p_ptr;
int win = l_ptr->queue_limit[0] - l_ptr->out_queue_size;
if (all)
@@ -445,11 +457,11 @@ void tipc_link_wakeup_ports(struct link *l_ptr, int all)
if (win <= 0)
break;
list_del_init(&p_ptr->wait_list);
- spin_lock_bh(p_ptr->publ.lock);
- p_ptr->publ.congested = 0;
- p_ptr->wakeup(&p_ptr->publ);
+ spin_lock_bh(p_ptr->lock);
+ p_ptr->congested = 0;
+ p_ptr->wakeup(p_ptr);
win -= p_ptr->waiting_pkts;
- spin_unlock_bh(p_ptr->publ.lock);
+ spin_unlock_bh(p_ptr->lock);
}
exit:
@@ -549,7 +561,7 @@ void tipc_link_reset(struct link *l_ptr)
tipc_node_link_down(l_ptr->owner, l_ptr);
tipc_bearer_remove_dest(l_ptr->b_ptr, l_ptr->addr);
- if (was_active_link && tipc_node_has_active_links(l_ptr->owner) &&
+ if (was_active_link && tipc_node_active_links(l_ptr->owner) &&
l_ptr->owner->permit_changeover) {
l_ptr->reset_checkpoint = checkpoint;
l_ptr->exp_msg_count = START_CHANGEOVER;
@@ -824,7 +836,10 @@ static void link_add_to_outqueue(struct link *l_ptr,
l_ptr->last_out = buf;
} else
l_ptr->first_out = l_ptr->last_out = buf;
+
l_ptr->out_queue_size++;
+ if (l_ptr->out_queue_size > l_ptr->stats.max_queue_sz)
+ l_ptr->stats.max_queue_sz = l_ptr->out_queue_size;
}
/*
@@ -867,9 +882,6 @@ int tipc_link_send_buf(struct link *l_ptr, struct sk_buff *buf)
/* Packet can be queued or sent: */
- if (queue_size > l_ptr->stats.max_queue_sz)
- l_ptr->stats.max_queue_sz = queue_size;
-
if (likely(!tipc_bearer_congested(l_ptr->b_ptr, l_ptr) &&
!link_congested(l_ptr))) {
link_add_to_outqueue(l_ptr, buf, msg);
@@ -1027,12 +1039,12 @@ int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode)
* except for total message length.
* Returns user data length or errno.
*/
-int tipc_link_send_sections_fast(struct port *sender,
+int tipc_link_send_sections_fast(struct tipc_port *sender,
struct iovec const *msg_sect,
const u32 num_sect,
u32 destaddr)
{
- struct tipc_msg *hdr = &sender->publ.phdr;
+ struct tipc_msg *hdr = &sender->phdr;
struct link *l_ptr;
struct sk_buff *buf;
struct tipc_node *node;
@@ -1045,7 +1057,7 @@ again:
* (Must not hold any locks while building message.)
*/
- res = tipc_msg_build(hdr, msg_sect, num_sect, sender->publ.max_pkt,
+ res = tipc_msg_build(hdr, msg_sect, num_sect, sender->max_pkt,
!sender->user_port, &buf);
read_lock_bh(&tipc_net_lock);
@@ -1056,7 +1068,7 @@ again:
if (likely(l_ptr)) {
if (likely(buf)) {
res = link_send_buf_fast(l_ptr, buf,
- &sender->publ.max_pkt);
+ &sender->max_pkt);
if (unlikely(res < 0))
buf_discard(buf);
exit:
@@ -1075,7 +1087,7 @@ exit:
if (link_congested(l_ptr) ||
!list_empty(&l_ptr->b_ptr->cong_links)) {
res = link_schedule_port(l_ptr,
- sender->publ.ref, res);
+ sender->ref, res);
goto exit;
}
@@ -1084,12 +1096,12 @@ exit:
* then re-try fast path or fragment the message
*/
- sender->publ.max_pkt = l_ptr->max_pkt;
+ sender->max_pkt = l_ptr->max_pkt;
tipc_node_unlock(node);
read_unlock_bh(&tipc_net_lock);
- if ((msg_hdr_sz(hdr) + res) <= sender->publ.max_pkt)
+ if ((msg_hdr_sz(hdr) + res) <= sender->max_pkt)
goto again;
return link_send_sections_long(sender, msg_sect,
@@ -1123,14 +1135,14 @@ exit:
*
* Returns user data length or errno.
*/
-static int link_send_sections_long(struct port *sender,
+static int link_send_sections_long(struct tipc_port *sender,
struct iovec const *msg_sect,
u32 num_sect,
u32 destaddr)
{
struct link *l_ptr;
struct tipc_node *node;
- struct tipc_msg *hdr = &sender->publ.phdr;
+ struct tipc_msg *hdr = &sender->phdr;
u32 dsz = msg_data_sz(hdr);
u32 max_pkt, fragm_sz, rest;
struct tipc_msg fragm_hdr;
@@ -1142,7 +1154,7 @@ static int link_send_sections_long(struct port *sender,
again:
fragm_no = 1;
- max_pkt = sender->publ.max_pkt - INT_H_SIZE;
+ max_pkt = sender->max_pkt - INT_H_SIZE;
/* leave room for tunnel header in case of link changeover */
fragm_sz = max_pkt - INT_H_SIZE;
/* leave room for fragmentation header in each fragment */
@@ -1157,7 +1169,7 @@ again:
tipc_msg_init(&fragm_hdr, MSG_FRAGMENTER, FIRST_FRAGMENT,
INT_H_SIZE, msg_destnode(hdr));
- msg_set_link_selector(&fragm_hdr, sender->publ.ref);
+ msg_set_link_selector(&fragm_hdr, sender->ref);
msg_set_size(&fragm_hdr, max_pkt);
msg_set_fragm_no(&fragm_hdr, 1);
@@ -1238,13 +1250,13 @@ error:
node = tipc_node_find(destaddr);
if (likely(node)) {
tipc_node_lock(node);
- l_ptr = node->active_links[sender->publ.ref & 1];
+ l_ptr = node->active_links[sender->ref & 1];
if (!l_ptr) {
tipc_node_unlock(node);
goto reject;
}
if (l_ptr->max_pkt < max_pkt) {
- sender->publ.max_pkt = l_ptr->max_pkt;
+ sender->max_pkt = l_ptr->max_pkt;
tipc_node_unlock(node);
for (; buf_chain; buf_chain = buf) {
buf = buf_chain->next;
@@ -1441,7 +1453,7 @@ static void link_retransmit_failure(struct link *l_ptr, struct sk_buff *buf)
info("Outstanding acks: %lu\n",
(unsigned long) TIPC_SKB_CB(buf)->handle);
- n_ptr = l_ptr->owner->next;
+ n_ptr = tipc_bclink_retransmit_to();
tipc_node_lock(n_ptr);
tipc_addr_string_fill(addr_string, n_ptr->addr);
@@ -1595,11 +1607,10 @@ static int link_recv_buf_validate(struct sk_buff *buf)
* structure (i.e. cannot be NULL), but bearer can be inactive.
*/
-void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *tb_ptr)
+void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *b_ptr)
{
read_lock_bh(&tipc_net_lock);
while (head) {
- struct bearer *b_ptr = (struct bearer *)tb_ptr;
struct tipc_node *n_ptr;
struct link *l_ptr;
struct sk_buff *crs;
@@ -1735,10 +1746,6 @@ deliver:
tipc_node_unlock(n_ptr);
tipc_link_recv_bundle(buf);
continue;
- case ROUTE_DISTRIBUTOR:
- tipc_node_unlock(n_ptr);
- buf_discard(buf);
- continue;
case NAME_DISTRIBUTOR:
tipc_node_unlock(n_ptr);
tipc_named_recv(buf);
@@ -1765,6 +1772,10 @@ deliver:
goto protocol_check;
}
break;
+ default:
+ buf_discard(buf);
+ buf = NULL;
+ break;
}
}
tipc_node_unlock(n_ptr);
@@ -1900,6 +1911,7 @@ void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
struct sk_buff *buf = NULL;
struct tipc_msg *msg = l_ptr->pmsg;
u32 msg_size = sizeof(l_ptr->proto_msg);
+ int r_flag;
if (link_blocked(l_ptr))
return;
@@ -1950,15 +1962,14 @@ void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
msg_set_ack(msg, mod(l_ptr->reset_checkpoint - 1));
msg_set_seq_gap(msg, 0);
msg_set_next_sent(msg, 1);
+ msg_set_probe(msg, 0);
msg_set_link_tolerance(msg, l_ptr->tolerance);
msg_set_linkprio(msg, l_ptr->priority);
msg_set_max_pkt(msg, l_ptr->max_pkt_target);
}
- if (tipc_node_has_redundant_links(l_ptr->owner))
- msg_set_redundant_link(msg);
- else
- msg_clear_redundant_link(msg);
+ r_flag = (l_ptr->owner->working_links > tipc_link_is_up(l_ptr));
+ msg_set_redundant_link(msg, r_flag);
msg_set_linkprio(msg, l_ptr->priority);
/* Ensure sequence number will not fit : */
@@ -1978,7 +1989,6 @@ void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg));
return;
}
- msg_set_timestamp(msg, jiffies_to_msecs(jiffies));
/* Message can be sent */
@@ -2066,7 +2076,7 @@ static void link_recv_proto_msg(struct link *l_ptr, struct sk_buff *buf)
l_ptr->peer_bearer_id = msg_bearer_id(msg);
/* Synchronize broadcast sequence numbers */
- if (!tipc_node_has_redundant_links(l_ptr->owner))
+ if (!tipc_node_redundant_links(l_ptr->owner))
l_ptr->owner->bclink.last_in = mod(msg_last_bcast(msg));
break;
case STATE_MSG:
@@ -2413,9 +2423,6 @@ static int link_send_long_buf(struct link *l_ptr, struct sk_buff *buf)
else
destaddr = msg_destnode(inmsg);
- if (msg_routed(inmsg))
- msg_set_prevnode(inmsg, tipc_own_addr);
-
/* Prepare reusable fragment header: */
tipc_msg_init(&fragm_hdr, MSG_FRAGMENTER, FIRST_FRAGMENT,
@@ -2618,6 +2625,9 @@ static void link_check_defragm_bufs(struct link *l_ptr)
static void link_set_supervision_props(struct link *l_ptr, u32 tolerance)
{
+ if ((tolerance < TIPC_MIN_LINK_TOL) || (tolerance > TIPC_MAX_LINK_TOL))
+ return;
+
l_ptr->tolerance = tolerance;
l_ptr->continuity_interval =
((tolerance / 4) > 500) ? 500 : tolerance / 4;
@@ -2658,7 +2668,7 @@ void tipc_link_set_queue_limits(struct link *l_ptr, u32 window)
static struct link *link_find_link(const char *name, struct tipc_node **node)
{
struct link_name link_name_parts;
- struct bearer *b_ptr;
+ struct tipc_bearer *b_ptr;
struct link *l_ptr;
if (!link_name_validate(name, &link_name_parts))
@@ -2961,7 +2971,7 @@ static void link_print(struct link *l_ptr, const char *str)
tipc_printf(buf, str);
tipc_printf(buf, "Link %x<%s>:",
- l_ptr->addr, l_ptr->b_ptr->publ.name);
+ l_ptr->addr, l_ptr->b_ptr->name);
#ifdef CONFIG_TIPC_DEBUG
if (link_reset_reset(l_ptr) || link_reset_unknown(l_ptr))
@@ -2981,9 +2991,9 @@ static void link_print(struct link *l_ptr, const char *str)
!= (l_ptr->out_queue_size - 1)) ||
(l_ptr->last_out->next != NULL)) {
tipc_printf(buf, "\nSend queue inconsistency\n");
- tipc_printf(buf, "first_out= %x ", l_ptr->first_out);
- tipc_printf(buf, "next_out= %x ", l_ptr->next_out);
- tipc_printf(buf, "last_out= %x ", l_ptr->last_out);
+ tipc_printf(buf, "first_out= %p ", l_ptr->first_out);
+ tipc_printf(buf, "next_out= %p ", l_ptr->next_out);
+ tipc_printf(buf, "last_out= %p ", l_ptr->last_out);
}
} else
tipc_printf(buf, "[]");
generated by cgit v1.1 at 2024-05-06 11:39:34 +0000