static void tipc_node_link_down(struct tipc_node *n, int bearer_id,
bool delete);
static void node_lost_contact(struct tipc_node *n, struct sk_buff_head *inputq);
-static void node_established_contact(struct tipc_node *n_ptr);
static void tipc_node_delete(struct tipc_node *node);
static void tipc_node_timeout(unsigned long data);
static void tipc_node_fsm_evt(struct tipc_node *n, int evt);
INIT_LIST_HEAD(&n_ptr->list);
INIT_LIST_HEAD(&n_ptr->publ_list);
INIT_LIST_HEAD(&n_ptr->conn_sks);
- skb_queue_head_init(&n_ptr->bclink.namedq);
- __skb_queue_head_init(&n_ptr->bclink.deferdq);
+ skb_queue_head_init(&n_ptr->bc_entry.namedq);
+ skb_queue_head_init(&n_ptr->bc_entry.inputq1);
+ __skb_queue_head_init(&n_ptr->bc_entry.arrvq);
+ skb_queue_head_init(&n_ptr->bc_entry.inputq2);
hlist_add_head_rcu(&n_ptr->hash, &tn->node_htable[tipc_hashfn(addr)]);
list_for_each_entry_rcu(temp_node, &tn->node_list, list) {
if (n_ptr->addr < temp_node->addr)
n_ptr->signature = INVALID_NODE_SIG;
n_ptr->active_links[0] = INVALID_BEARER_ID;
n_ptr->active_links[1] = INVALID_BEARER_ID;
+ if (!tipc_link_bc_create(net, tipc_own_addr(net), n_ptr->addr,
+ U16_MAX, tipc_bc_sndlink(net)->window,
+ n_ptr->capabilities,
+ &n_ptr->bc_entry.inputq1,
+ &n_ptr->bc_entry.namedq,
+ tipc_bc_sndlink(net),
+ &n_ptr->bc_entry.link)) {
+ pr_warn("Broadcast rcv link creation failed, no memory\n");
+ kfree(n_ptr);
+ n_ptr = NULL;
+ goto exit;
+ }
tipc_node_get(n_ptr);
setup_timer(&n_ptr->timer, tipc_node_timeout, (unsigned long)n_ptr);
n_ptr->keepalive_intv = U32_MAX;
{
list_del_rcu(&node->list);
hlist_del_rcu(&node->hash);
+ kfree(node->bc_entry.link);
kfree_rcu(node, rcu);
}
struct tipc_link *ol = node_active_link(n, 0);
struct tipc_link *nl = n->links[bearer_id].link;
- if (!nl || !tipc_link_is_up(nl))
+ if (!nl)
+ return;
+
+ tipc_link_fsm_evt(nl, LINK_ESTABLISH_EVT);
+ if (!tipc_link_is_up(nl))
return;
n->working_links++;
n->links[bearer_id].mtu = nl->mtu - INT_H_SIZE;
tipc_bearer_add_dest(n->net, bearer_id, n->addr);
+ tipc_bcast_inc_bearer_dst_cnt(n->net, bearer_id);
pr_debug("Established link <%s> on network plane %c\n",
nl->name, nl->net_plane);
if (!ol) {
*slot0 = bearer_id;
*slot1 = bearer_id;
- tipc_link_build_bcast_sync_msg(nl, xmitq);
- node_established_contact(n);
+ tipc_node_fsm_evt(n, SELF_ESTABL_CONTACT_EVT);
+ n->action_flags |= TIPC_NOTIFY_NODE_UP;
+ tipc_bcast_add_peer(n->net, nl, xmitq);
return;
}
pr_debug("Old link <%s> becomes standby\n", ol->name);
*slot0 = bearer_id;
*slot1 = bearer_id;
+ tipc_link_set_active(nl, true);
+ tipc_link_set_active(ol, false);
} else if (nl->priority == ol->priority) {
- *slot0 = bearer_id;
+ tipc_link_set_active(nl, true);
+ *slot1 = bearer_id;
} else {
pr_debug("New link <%s> is standby\n", nl->name);
}
}
if (!tipc_node_is_up(n)) {
+ if (tipc_link_peer_is_down(l))
+ tipc_node_fsm_evt(n, PEER_LOST_CONTACT_EVT);
+ tipc_node_fsm_evt(n, SELF_LOST_CONTACT_EVT);
+ tipc_link_fsm_evt(l, LINK_RESET_EVT);
tipc_link_reset(l);
+ tipc_link_build_reset_msg(l, xmitq);
+ *maddr = &n->links[*bearer_id].maddr;
node_lost_contact(n, &le->inputq);
+ tipc_bcast_dec_bearer_dst_cnt(n->net, *bearer_id);
return;
}
+ tipc_bcast_dec_bearer_dst_cnt(n->net, *bearer_id);
/* There is still a working link => initiate failover */
tnl = node_active_link(n, 0);
n->sync_point = tnl->rcv_nxt + (U16_MAX / 2 - 1);
tipc_link_tnl_prepare(l, tnl, FAILOVER_MSG, xmitq);
tipc_link_reset(l);
+ tipc_link_fsm_evt(l, LINK_RESET_EVT);
tipc_link_fsm_evt(l, LINK_FAILOVER_BEGIN_EVT);
tipc_node_fsm_evt(n, NODE_FAILOVER_BEGIN_EVT);
*maddr = &n->links[tnl->bearer_id].maddr;
static void tipc_node_link_down(struct tipc_node *n, int bearer_id, bool delete)
{
struct tipc_link_entry *le = &n->links[bearer_id];
+ struct tipc_link *l = le->link;
struct tipc_media_addr *maddr;
struct sk_buff_head xmitq;
+ if (!l)
+ return;
+
__skb_queue_head_init(&xmitq);
tipc_node_lock(n);
- __tipc_node_link_down(n, &bearer_id, &xmitq, &maddr);
- if (delete && le->link) {
- kfree(le->link);
- le->link = NULL;
- n->link_cnt--;
+ if (!tipc_link_is_establishing(l)) {
+ __tipc_node_link_down(n, &bearer_id, &xmitq, &maddr);
+ if (delete) {
+ kfree(l);
+ le->link = NULL;
+ n->link_cnt--;
+ }
+ } else {
+ /* Defuse pending tipc_node_link_up() */
+ tipc_link_fsm_evt(l, LINK_RESET_EVT);
}
tipc_node_unlock(n);
-
tipc_bearer_xmit(n->net, bearer_id, &xmitq, maddr);
tipc_sk_rcv(n->net, &le->inputq);
}
bool link_up = false;
bool accept_addr = false;
bool reset = true;
+ char *if_name;
*dupl_addr = false;
*respond = false;
pr_warn("Cannot establish 3rd link to %x\n", n->addr);
goto exit;
}
- if (!tipc_link_create(n, b, mod(tipc_net(net)->random),
- tipc_own_addr(net), onode, &le->maddr,
- &le->inputq, &n->bclink.namedq, &l)) {
+ if_name = strchr(b->name, ':') + 1;
+ if (!tipc_link_create(net, if_name, b->identity, b->tolerance,
+ b->net_plane, b->mtu, b->priority,
+ b->window, mod(tipc_net(net)->random),
+ tipc_own_addr(net), onode,
+ n->capabilities, &le->maddr,
+ tipc_bc_sndlink(n->net), n->bc_entry.link,
+ &le->inputq,
+ &n->bc_entry.namedq, &l)) {
*respond = false;
goto exit;
}
tipc_link_reset(l);
+ tipc_link_fsm_evt(l, LINK_RESET_EVT);
if (n->state == NODE_FAILINGOVER)
tipc_link_fsm_evt(l, LINK_FAILOVER_BEGIN_EVT);
le->link = l;
memcpy(&le->maddr, maddr, sizeof(*maddr));
exit:
tipc_node_unlock(n);
- if (reset)
+ if (reset && !tipc_link_is_reset(l))
tipc_node_link_down(n, b->identity, false);
tipc_node_put(n);
}
break;
case SELF_ESTABL_CONTACT_EVT:
case PEER_LOST_CONTACT_EVT:
- break;
case NODE_SYNCH_END_EVT:
- case NODE_SYNCH_BEGIN_EVT:
case NODE_FAILOVER_BEGIN_EVT:
+ break;
+ case NODE_SYNCH_BEGIN_EVT:
case NODE_FAILOVER_END_EVT:
default:
goto illegal_evt;
return true;
}
-static void node_established_contact(struct tipc_node *n_ptr)
-{
- tipc_node_fsm_evt(n_ptr, SELF_ESTABL_CONTACT_EVT);
- n_ptr->action_flags |= TIPC_NOTIFY_NODE_UP;
- n_ptr->bclink.oos_state = 0;
- n_ptr->bclink.acked = tipc_bclink_get_last_sent(n_ptr->net);
- tipc_bclink_add_node(n_ptr->net, n_ptr->addr);
-}
-
-static void node_lost_contact(struct tipc_node *n_ptr,
+static void node_lost_contact(struct tipc_node *n,
struct sk_buff_head *inputq)
{
char addr_string[16];
struct tipc_sock_conn *conn, *safe;
struct tipc_link *l;
- struct list_head *conns = &n_ptr->conn_sks;
+ struct list_head *conns = &n->conn_sks;
struct sk_buff *skb;
- struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id);
uint i;
pr_debug("Lost contact with %s\n",
- tipc_addr_string_fill(addr_string, n_ptr->addr));
-
- /* Flush broadcast link info associated with lost node */
- if (n_ptr->bclink.recv_permitted) {
- __skb_queue_purge(&n_ptr->bclink.deferdq);
+ tipc_addr_string_fill(addr_string, n->addr));
- if (n_ptr->bclink.reasm_buf) {
- kfree_skb(n_ptr->bclink.reasm_buf);
- n_ptr->bclink.reasm_buf = NULL;
- }
-
- tipc_bclink_remove_node(n_ptr->net, n_ptr->addr);
- tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
-
- n_ptr->bclink.recv_permitted = false;
- }
+ /* Clean up broadcast state */
+ tipc_bcast_remove_peer(n->net, n->bc_entry.link);
/* Abort any ongoing link failover */
for (i = 0; i < MAX_BEARERS; i++) {
- l = n_ptr->links[i].link;
+ l = n->links[i].link;
if (l)
tipc_link_fsm_evt(l, LINK_FAILOVER_END_EVT);
}
- /* Prevent re-contact with node until cleanup is done */
- tipc_node_fsm_evt(n_ptr, SELF_LOST_CONTACT_EVT);
-
/* Notify publications from this node */
- n_ptr->action_flags |= TIPC_NOTIFY_NODE_DOWN;
+ n->action_flags |= TIPC_NOTIFY_NODE_DOWN;
/* Notify sockets connected to node */
list_for_each_entry_safe(conn, safe, conns, list) {
skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
- SHORT_H_SIZE, 0, tn->own_addr,
+ SHORT_H_SIZE, 0, tipc_own_addr(n->net),
conn->peer_node, conn->port,
conn->peer_port, TIPC_ERR_NO_NODE);
if (likely(skb))
return 0;
}
+/**
+ * tipc_node_bc_rcv - process TIPC broadcast packet arriving from off-node
+ * @net: the applicable net namespace
+ * @skb: TIPC packet
+ * @bearer_id: id of bearer message arrived on
+ *
+ * Invoked with no locks held.
+ */
+void tipc_node_bc_rcv(struct net *net, struct sk_buff *skb, int bearer_id)
+{
+ int rc;
+ struct sk_buff_head xmitq;
+ struct tipc_bclink_entry *be;
+ struct tipc_link_entry *le;
+ struct tipc_msg *hdr = buf_msg(skb);
+ int usr = msg_user(hdr);
+ u32 dnode = msg_destnode(hdr);
+ struct tipc_node *n;
+
+ __skb_queue_head_init(&xmitq);
+
+ /* If NACK for other node, let rcv link for that node peek into it */
+ if ((usr == BCAST_PROTOCOL) && (dnode != tipc_own_addr(net)))
+ n = tipc_node_find(net, dnode);
+ else
+ n = tipc_node_find(net, msg_prevnode(hdr));
+ if (!n) {
+ kfree_skb(skb);
+ return;
+ }
+ be = &n->bc_entry;
+ le = &n->links[bearer_id];
+
+ rc = tipc_bcast_rcv(net, be->link, skb);
+
+ /* Broadcast link reset may happen at reassembly failure */
+ if (rc & TIPC_LINK_DOWN_EVT)
+ tipc_node_reset_links(n);
+
+ /* Broadcast ACKs are sent on a unicast link */
+ if (rc & TIPC_LINK_SND_BC_ACK) {
+ tipc_node_lock(n);
+ tipc_link_build_ack_msg(le->link, &xmitq);
+ tipc_node_unlock(n);
+ }
+
+ if (!skb_queue_empty(&xmitq))
+ tipc_bearer_xmit(net, bearer_id, &xmitq, &le->maddr);
+
+ /* Deliver. 'arrvq' is under inputq2's lock protection */
+ if (!skb_queue_empty(&be->inputq1)) {
+ spin_lock_bh(&be->inputq2.lock);
+ spin_lock_bh(&be->inputq1.lock);
+ skb_queue_splice_tail_init(&be->inputq1, &be->arrvq);
+ spin_unlock_bh(&be->inputq1.lock);
+ spin_unlock_bh(&be->inputq2.lock);
+ tipc_sk_mcast_rcv(net, &be->arrvq, &be->inputq2);
+ }
+ tipc_node_put(n);
+}
+
/**
* tipc_node_check_state - check and if necessary update node state
* @skb: TIPC packet
}
/* Ignore duplicate packets */
- if (less(oseqno, rcv_nxt))
+ if ((usr != LINK_PROTOCOL) && less(oseqno, rcv_nxt))
return true;
/* Initiate or update failover mode if applicable */
if (!pl || !tipc_link_is_up(pl))
return true;
- /* Initiate or update synch mode if applicable */
- if ((usr == TUNNEL_PROTOCOL) && (mtyp == SYNCH_MSG)) {
+ /* Initiate synch mode if applicable */
+ if ((usr == TUNNEL_PROTOCOL) && (mtyp == SYNCH_MSG) && (oseqno == 1)) {
syncpt = iseqno + exp_pkts - 1;
if (!tipc_link_is_up(l)) {
tipc_link_fsm_evt(l, LINK_ESTABLISH_EVT);
int usr = msg_user(hdr);
int bearer_id = b->identity;
struct tipc_link_entry *le;
+ u16 bc_ack = msg_bcast_ack(hdr);
int rc = 0;
__skb_queue_head_init(&xmitq);
if (unlikely(!tipc_msg_validate(skb)))
goto discard;
- /* Handle arrival of a non-unicast link packet */
+ /* Handle arrival of discovery or broadcast packet */
if (unlikely(msg_non_seq(hdr))) {
- if (usr == LINK_CONFIG)
- tipc_disc_rcv(net, skb, b);
+ if (unlikely(usr == LINK_CONFIG))
+ return tipc_disc_rcv(net, skb, b);
else
- tipc_bclink_rcv(net, skb);
- return;
+ return tipc_node_bc_rcv(net, skb, bearer_id);
}
/* Locate neighboring node that sent packet */
goto discard;
le = &n->links[bearer_id];
+ /* Ensure broadcast reception is in synch with peer's send state */
+ if (unlikely(usr == LINK_PROTOCOL))
+ tipc_bcast_sync_rcv(net, n->bc_entry.link, hdr);
+ else if (unlikely(n->bc_entry.link->acked != bc_ack))
+ tipc_bcast_ack_rcv(net, n->bc_entry.link, bc_ack);
+
tipc_node_lock(n);
/* Is reception permitted at the moment ? */
if (!tipc_node_filter_pkt(n, hdr))
goto unlock;
- if (unlikely(msg_user(hdr) == LINK_PROTOCOL))
- tipc_bclink_sync_state(n, hdr);
-
- /* Release acked broadcast packets */
- if (unlikely(n->bclink.acked != msg_bcast_ack(hdr)))
- tipc_bclink_acknowledge(n, msg_bcast_ack(hdr));
-
/* Check and if necessary update node state */
if (likely(tipc_node_check_state(n, skb, bearer_id, &xmitq))) {
rc = tipc_link_rcv(le->link, skb, &xmitq);
if (unlikely(rc & TIPC_LINK_DOWN_EVT))
tipc_node_link_down(n, bearer_id, false);
- if (unlikely(!skb_queue_empty(&n->bclink.namedq)))
- tipc_named_rcv(net, &n->bclink.namedq);
+ if (unlikely(!skb_queue_empty(&n->bc_entry.namedq)))
+ tipc_named_rcv(net, &n->bc_entry.namedq);
if (!skb_queue_empty(&le->inputq))
tipc_sk_rcv(net, &le->inputq);
projects / karo-tx-linux.git / blobdiff