summaryrefslogtreecommitdiffstats
path: root/net/tipc/link.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c153
1 files changed, 152 insertions, 1 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 9e265eb89726..55c44d867d4b 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -43,6 +43,7 @@
#include "discover.h"
#include "netlink.h"
#include "monitor.h"
+#include "trace.h"
#include <linux/pkt_sched.h>
@@ -356,9 +357,11 @@ void tipc_link_remove_bc_peer(struct tipc_link *snd_l,
rcv_l->bc_peer_is_up = true;
rcv_l->state = LINK_ESTABLISHED;
tipc_link_bc_ack_rcv(rcv_l, ack, xmitq);
+ trace_tipc_link_reset(rcv_l, TIPC_DUMP_ALL, "bclink removed!");
tipc_link_reset(rcv_l);
rcv_l->state = LINK_RESET;
if (!snd_l->ackers) {
+ trace_tipc_link_reset(snd_l, TIPC_DUMP_ALL, "zero ackers!");
tipc_link_reset(snd_l);
snd_l->state = LINK_RESET;
__skb_queue_purge(xmitq);
@@ -522,6 +525,7 @@ bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer,
l = *link;
strcpy(l->name, tipc_bclink_name);
+ trace_tipc_link_reset(l, TIPC_DUMP_ALL, "bclink created!");
tipc_link_reset(l);
l->state = LINK_RESET;
l->ackers = 0;
@@ -546,6 +550,7 @@ bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer,
int tipc_link_fsm_evt(struct tipc_link *l, int evt)
{
int rc = 0;
+ int old_state = l->state;
switch (l->state) {
case LINK_RESETTING:
@@ -692,10 +697,12 @@ int tipc_link_fsm_evt(struct tipc_link *l, int evt)
default:
pr_err("Unknown FSM state %x in %s\n", l->state, l->name);
}
+ trace_tipc_link_fsm(l->name, old_state, l->state, evt);
return rc;
illegal_evt:
pr_err("Illegal FSM event %x in state %x on link %s\n",
evt, l->state, l->name);
+ trace_tipc_link_fsm(l->name, old_state, l->state, evt);
return rc;
}
@@ -740,6 +747,18 @@ static void link_profile_stats(struct tipc_link *l)
l->stats.msg_length_profile[6]++;
}
+/**
+ * tipc_link_too_silent - check if link is "too silent"
+ * @l: tipc link to be checked
+ *
+ * Returns true if the link 'silent_intv_cnt' is about to reach the
+ * 'abort_limit' value, otherwise false
+ */
+bool tipc_link_too_silent(struct tipc_link *l)
+{
+ return (l->silent_intv_cnt + 2 > l->abort_limit);
+}
+
/* tipc_link_timeout - perform periodic task as instructed from node timeout
*/
int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq)
@@ -753,6 +772,8 @@ int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq)
u16 bc_acked = l->bc_rcvlink->acked;
struct tipc_mon_state *mstate = &l->mon_state;
+ trace_tipc_link_timeout(l, TIPC_DUMP_NONE, " ");
+ trace_tipc_link_too_silent(l, TIPC_DUMP_ALL, " ");
switch (l->state) {
case LINK_ESTABLISHED:
case LINK_SYNCHING:
@@ -815,6 +836,7 @@ static int link_schedule_user(struct tipc_link *l, struct tipc_msg *hdr)
TIPC_SKB_CB(skb)->chain_imp = msg_importance(hdr);
skb_queue_tail(&l->wakeupq, skb);
l->stats.link_congs++;
+ trace_tipc_link_conges(l, TIPC_DUMP_ALL, "wakeup scheduled!");
return -ELINKCONG;
}
@@ -1036,6 +1058,7 @@ static int tipc_link_retrans(struct tipc_link *l, struct tipc_link *r,
if (less(to, from))
return 0;
+ trace_tipc_link_retrans(r, from, to, &l->transmq);
/* Detect repeated retransmit failures on same packet */
if (r->prev_from != from) {
r->prev_from = from;
@@ -1043,6 +1066,9 @@ static int tipc_link_retrans(struct tipc_link *l, struct tipc_link *r,
r->stale_cnt = 0;
} else if (++r->stale_cnt > 99 && time_after(jiffies, r->stale_limit)) {
link_retransmit_failure(l, skb);
+ trace_tipc_list_dump(&l->transmq, true, "retrans failure!");
+ trace_tipc_link_dump(l, TIPC_DUMP_NONE, "retrans failure!");
+ trace_tipc_link_dump(r, TIPC_DUMP_NONE, "retrans failure!");
if (link_is_bc_sndlink(l))
return TIPC_LINK_DOWN_EVT;
return tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
@@ -1402,6 +1428,7 @@ static void tipc_link_build_proto_msg(struct tipc_link *l, int mtyp, bool probe,
l->stats.sent_nacks++;
skb->priority = TC_PRIO_CONTROL;
__skb_queue_tail(xmitq, skb);
+ trace_tipc_proto_build(skb, false, l->name);
}
void tipc_link_create_dummy_tnl_msg(struct tipc_link *l,
@@ -1565,6 +1592,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
char *if_name;
int rc = 0;
+ trace_tipc_proto_rcv(skb, false, l->name);
if (tipc_link_is_blocked(l) || !xmitq)
goto exit;
@@ -1575,8 +1603,11 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
hdr = buf_msg(skb);
data = msg_data(hdr);
- if (!tipc_link_validate_msg(l, hdr))
+ if (!tipc_link_validate_msg(l, hdr)) {
+ trace_tipc_skb_dump(skb, false, "PROTO invalid (1)!");
+ trace_tipc_link_dump(l, TIPC_DUMP_NONE, "PROTO invalid (1)!");
goto exit;
+ }
switch (mtyp) {
case RESET_MSG:
@@ -1819,6 +1850,7 @@ void tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked,
if (!more(acked, l->acked))
return;
+ trace_tipc_link_bc_ack(l, l->acked, acked, &snd_l->transmq);
/* Skip over packets peer has already acked */
skb_queue_walk(&snd_l->transmq, skb) {
if (more(buf_seqno(skb), l->acked))
@@ -2222,3 +2254,122 @@ void tipc_link_set_abort_limit(struct tipc_link *l, u32 limit)
{
l->abort_limit = limit;
}
+
+char *tipc_link_name_ext(struct tipc_link *l, char *buf)
+{
+ if (!l)
+ scnprintf(buf, TIPC_MAX_LINK_NAME, "null");
+ else if (link_is_bc_sndlink(l))
+ scnprintf(buf, TIPC_MAX_LINK_NAME, "broadcast-sender");
+ else if (link_is_bc_rcvlink(l))
+ scnprintf(buf, TIPC_MAX_LINK_NAME,
+ "broadcast-receiver, peer %x", l->addr);
+ else
+ memcpy(buf, l->name, TIPC_MAX_LINK_NAME);
+
+ return buf;
+}
+
+/**
+ * tipc_link_dump - dump TIPC link data
+ * @l: tipc link to be dumped
+ * @dqueues: bitmask to decide if any link queue to be dumped?
+ * - TIPC_DUMP_NONE: don't dump link queues
+ * - TIPC_DUMP_TRANSMQ: dump link transmq queue
+ * - TIPC_DUMP_BACKLOGQ: dump link backlog queue
+ * - TIPC_DUMP_DEFERDQ: dump link deferd queue
+ * - TIPC_DUMP_INPUTQ: dump link input queue
+ * - TIPC_DUMP_WAKEUP: dump link wakeup queue
+ * - TIPC_DUMP_ALL: dump all the link queues above
+ * @buf: returned buffer of dump data in format
+ */
+int tipc_link_dump(struct tipc_link *l, u16 dqueues, char *buf)
+{
+ int i = 0;
+ size_t sz = (dqueues) ? LINK_LMAX : LINK_LMIN;
+ struct sk_buff_head *list;
+ struct sk_buff *hskb, *tskb;
+ u32 len;
+
+ if (!l) {
+ i += scnprintf(buf, sz, "link data: (null)\n");
+ return i;
+ }
+
+ i += scnprintf(buf, sz, "link data: %x", l->addr);
+ i += scnprintf(buf + i, sz - i, " %x", l->state);
+ i += scnprintf(buf + i, sz - i, " %u", l->in_session);
+ i += scnprintf(buf + i, sz - i, " %u", l->session);
+ i += scnprintf(buf + i, sz - i, " %u", l->peer_session);
+ i += scnprintf(buf + i, sz - i, " %u", l->snd_nxt);
+ i += scnprintf(buf + i, sz - i, " %u", l->rcv_nxt);
+ i += scnprintf(buf + i, sz - i, " %u", l->snd_nxt_state);
+ i += scnprintf(buf + i, sz - i, " %u", l->rcv_nxt_state);
+ i += scnprintf(buf + i, sz - i, " %x", l->peer_caps);
+ i += scnprintf(buf + i, sz - i, " %u", l->silent_intv_cnt);
+ i += scnprintf(buf + i, sz - i, " %u", l->rst_cnt);
+ i += scnprintf(buf + i, sz - i, " %u", l->prev_from);
+ i += scnprintf(buf + i, sz - i, " %u", l->stale_cnt);
+ i += scnprintf(buf + i, sz - i, " %u", l->acked);
+
+ list = &l->transmq;
+ len = skb_queue_len(list);
+ hskb = skb_peek(list);
+ tskb = skb_peek_tail(list);
+ i += scnprintf(buf + i, sz - i, " | %u %u %u", len,
+ (hskb) ? msg_seqno(buf_msg(hskb)) : 0,
+ (tskb) ? msg_seqno(buf_msg(tskb)) : 0);
+
+ list = &l->deferdq;
+ len = skb_queue_len(list);
+ hskb = skb_peek(list);
+ tskb = skb_peek_tail(list);
+ i += scnprintf(buf + i, sz - i, " | %u %u %u", len,
+ (hskb) ? msg_seqno(buf_msg(hskb)) : 0,
+ (tskb) ? msg_seqno(buf_msg(tskb)) : 0);
+
+ list = &l->backlogq;
+ len = skb_queue_len(list);
+ hskb = skb_peek(list);
+ tskb = skb_peek_tail(list);
+ i += scnprintf(buf + i, sz - i, " | %u %u %u", len,
+ (hskb) ? msg_seqno(buf_msg(hskb)) : 0,
+ (tskb) ? msg_seqno(buf_msg(tskb)) : 0);
+
+ list = l->inputq;
+ len = skb_queue_len(list);
+ hskb = skb_peek(list);
+ tskb = skb_peek_tail(list);
+ i += scnprintf(buf + i, sz - i, " | %u %u %u\n", len,
+ (hskb) ? msg_seqno(buf_msg(hskb)) : 0,
+ (tskb) ? msg_seqno(buf_msg(tskb)) : 0);
+
+ if (dqueues & TIPC_DUMP_TRANSMQ) {
+ i += scnprintf(buf + i, sz - i, "transmq: ");
+ i += tipc_list_dump(&l->transmq, false, buf + i);
+ }
+ if (dqueues & TIPC_DUMP_BACKLOGQ) {
+ i += scnprintf(buf + i, sz - i,
+ "backlogq: <%u %u %u %u %u>, ",
+ l->backlog[TIPC_LOW_IMPORTANCE].len,
+ l->backlog[TIPC_MEDIUM_IMPORTANCE].len,
+ l->backlog[TIPC_HIGH_IMPORTANCE].len,
+ l->backlog[TIPC_CRITICAL_IMPORTANCE].len,
+ l->backlog[TIPC_SYSTEM_IMPORTANCE].len);
+ i += tipc_list_dump(&l->backlogq, false, buf + i);
+ }
+ if (dqueues & TIPC_DUMP_DEFERDQ) {
+ i += scnprintf(buf + i, sz - i, "deferdq: ");
+ i += tipc_list_dump(&l->deferdq, false, buf + i);
+ }
+ if (dqueues & TIPC_DUMP_INPUTQ) {
+ i += scnprintf(buf + i, sz - i, "inputq: ");
+ i += tipc_list_dump(l->inputq, false, buf + i);
+ }
+ if (dqueues & TIPC_DUMP_WAKEUP) {
+ i += scnprintf(buf + i, sz - i, "wakeup: ");
+ i += tipc_list_dump(&l->wakeupq, false, buf + i);
+ }
+
+ return i;
+}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-04-30 20:52:35 +0200