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Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c40
1 files changed, 26 insertions, 14 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index e7c608631276..8c794c1dd531 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -125,6 +125,11 @@ bool tipc_link_is_reset(struct tipc_link *l)
return l->state & (LINK_RESET | LINK_FAILINGOVER | LINK_ESTABLISHING);
}
+bool tipc_link_is_establishing(struct tipc_link *l)
+{
+ return l->state == LINK_ESTABLISHING;
+}
+
bool tipc_link_is_synching(struct tipc_link *l)
{
return l->state == LINK_SYNCHING;
@@ -321,14 +326,15 @@ int tipc_link_fsm_evt(struct tipc_link *l, int evt)
switch (evt) {
case LINK_ESTABLISH_EVT:
l->state = LINK_ESTABLISHED;
- rc |= TIPC_LINK_UP_EVT;
break;
case LINK_FAILOVER_BEGIN_EVT:
l->state = LINK_FAILINGOVER;
break;
- case LINK_PEER_RESET_EVT:
case LINK_RESET_EVT:
+ l->state = LINK_RESET;
+ break;
case LINK_FAILURE_EVT:
+ case LINK_PEER_RESET_EVT:
case LINK_SYNCH_BEGIN_EVT:
case LINK_FAILOVER_END_EVT:
break;
@@ -1091,9 +1097,9 @@ int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,
return tipc_link_proto_rcv(l, skb, xmitq);
if (unlikely(!link_is_up(l))) {
- rc = tipc_link_fsm_evt(l, LINK_ESTABLISH_EVT);
- if (!link_is_up(l))
- goto drop;
+ if (l->state == LINK_ESTABLISHING)
+ rc = TIPC_LINK_UP_EVT;
+ goto drop;
}
/* Don't send probe at next timeout expiration */
@@ -1338,6 +1344,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
u16 peers_tol = msg_link_tolerance(hdr);
u16 peers_prio = msg_linkprio(hdr);
u16 rcv_nxt = l->rcv_nxt;
+ int mtyp = msg_type(hdr);
char *if_name;
int rc = 0;
@@ -1347,7 +1354,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
if (link_own_addr(l) > msg_prevnode(hdr))
l->net_plane = msg_net_plane(hdr);
- switch (msg_type(hdr)) {
+ switch (mtyp) {
case RESET_MSG:
/* Ignore duplicate RESET with old session number */
@@ -1374,12 +1381,14 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
if (in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
l->priority = peers_prio;
- if (msg_type(hdr) == RESET_MSG) {
- rc |= tipc_link_fsm_evt(l, LINK_PEER_RESET_EVT);
- } else if (!link_is_up(l)) {
- tipc_link_fsm_evt(l, LINK_PEER_RESET_EVT);
- rc |= tipc_link_fsm_evt(l, LINK_ESTABLISH_EVT);
- }
+ /* ACTIVATE_MSG serves as PEER_RESET if link is already down */
+ if ((mtyp == RESET_MSG) || !link_is_up(l))
+ rc = tipc_link_fsm_evt(l, LINK_PEER_RESET_EVT);
+
+ /* ACTIVATE_MSG takes up link if it was already locally reset */
+ if ((mtyp == ACTIVATE_MSG) && (l->state == LINK_ESTABLISHING))
+ rc = TIPC_LINK_UP_EVT;
+
l->peer_session = msg_session(hdr);
l->peer_bearer_id = msg_bearer_id(hdr);
if (l->mtu > msg_max_pkt(hdr))
@@ -1396,9 +1405,12 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
l->stats.recv_states++;
if (msg_probe(hdr))
l->stats.recv_probes++;
- rc = tipc_link_fsm_evt(l, LINK_ESTABLISH_EVT);
- if (!link_is_up(l))
+
+ if (!link_is_up(l)) {
+ if (l->state == LINK_ESTABLISHING)
+ rc = TIPC_LINK_UP_EVT;
break;
+ }
/* Send NACK if peer has sent pkts we haven't received yet */
if (more(peers_snd_nxt, rcv_nxt) && !tipc_link_is_synching(l))