1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/**
* @file e2e_tc.c
* @note Copyright (C) 2018 Richard Cochran <richardcochran@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA.
*/
#include <errno.h>
#include "port.h"
#include "port_private.h"
#include "print.h"
#include "rtnl.h"
#include "tc.h"
void e2e_dispatch(struct port *p, enum fsm_event event, int mdiff)
{
if (!port_state_update(p, event, mdiff)) {
return;
}
if (!portnum(p)) {
/* UDS needs no timers. */
return;
}
port_clr_tmo(p->fda.fd[FD_ANNOUNCE_TIMER]);
port_clr_tmo(p->fda.fd[FD_SYNC_RX_TIMER]);
/* Leave FD_DELAY_TIMER running. */
port_clr_tmo(p->fda.fd[FD_QUALIFICATION_TIMER]);
port_clr_tmo(p->fda.fd[FD_MANNO_TIMER]);
port_clr_tmo(p->fda.fd[FD_SYNC_TX_TIMER]);
/*
* Handle the side effects of the state transition.
*/
switch (p->state) {
case PS_INITIALIZING:
break;
case PS_FAULTY:
case PS_DISABLED:
port_disable(p);
break;
case PS_LISTENING:
port_set_announce_tmo(p);
port_set_delay_tmo(p);
break;
case PS_PRE_MASTER:
port_set_qualification_tmo(p);
break;
case PS_MASTER:
case PS_GRAND_MASTER:
break;
case PS_PASSIVE:
port_set_announce_tmo(p);
break;
case PS_UNCALIBRATED:
flush_last_sync(p);
flush_delay_req(p);
/* fall through */
case PS_SLAVE:
port_set_announce_tmo(p);
break;
};
}
enum fsm_event e2e_event(struct port *p, int fd_index)
{
int cnt, fd = p->fda.fd[fd_index];
enum fsm_event event = EV_NONE;
struct ptp_message *msg, *dup;
switch (fd_index) {
case FD_ANNOUNCE_TIMER:
case FD_SYNC_RX_TIMER:
pr_debug("%s: %s timeout", p->log_name,
fd_index == FD_SYNC_RX_TIMER ? "rx sync" : "announce");
if (p->best) {
fc_clear(p->best);
}
port_set_announce_tmo(p);
return EV_ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES;
case FD_DELAY_TIMER:
pr_debug("%s: delay timeout", p->log_name);
port_set_delay_tmo(p);
delay_req_prune(p);
tc_prune(p);
if (!clock_free_running(p->clock)) {
switch (p->state) {
case PS_UNCALIBRATED:
case PS_SLAVE:
if (port_delay_request(p)) {
event = EV_FAULT_DETECTED;
}
break;
default:
break;
};
}
return event;
case FD_QUALIFICATION_TIMER:
pr_debug("%s: qualification timeout", p->log_name);
return EV_QUALIFICATION_TIMEOUT_EXPIRES;
case FD_MANNO_TIMER:
case FD_SYNC_TX_TIMER:
case FD_UNICAST_REQ_TIMER:
case FD_UNICAST_SRV_TIMER:
pr_err("unexpected timer expiration");
return EV_NONE;
case FD_RTNL:
pr_debug("%s: received link status notification", p->log_name);
rtnl_link_status(fd, p->name, port_link_status, p);
if (p->link_status == (LINK_UP|LINK_STATE_CHANGED)) {
return EV_FAULT_CLEARED;
} else if ((p->link_status == (LINK_DOWN|LINK_STATE_CHANGED)) ||
(p->link_status & TS_LABEL_CHANGED)) {
return EV_FAULT_DETECTED;
} else {
return EV_NONE;
}
}
msg = msg_allocate();
if (!msg) {
return EV_FAULT_DETECTED;
}
msg->hwts.type = p->timestamping;
cnt = transport_recv(p->trp, fd, msg);
if (cnt <= 0) {
pr_err("%s: recv message failed", p->log_name);
msg_put(msg);
return EV_FAULT_DETECTED;
}
if (msg_sots_valid(msg)) {
ts_add(&msg->hwts.ts, -p->rx_timestamp_offset);
}
if (msg_unicast(msg)) {
pl_warning(600, "cannot handle unicast messages!");
msg_put(msg);
return EV_NONE;
}
dup = msg_duplicate(msg, cnt);
if (!dup) {
msg_put(msg);
return EV_NONE;
}
if (tc_ignore(p, dup)) {
msg_put(dup);
dup = NULL;
}
switch (msg_type(msg)) {
case SYNC:
if (tc_fwd_sync(p, msg)) {
event = EV_FAULT_DETECTED;
break;
}
if (dup) {
process_sync(p, dup);
}
break;
case DELAY_REQ:
if (tc_fwd_request(p, msg)) {
event = EV_FAULT_DETECTED;
}
break;
case PDELAY_REQ:
break;
case PDELAY_RESP:
break;
case FOLLOW_UP:
if (tc_fwd_folup(p, msg)) {
event = EV_FAULT_DETECTED;
break;
}
if (dup) {
process_follow_up(p, dup);
}
break;
case DELAY_RESP:
if (tc_fwd_response(p, msg)) {
event = EV_FAULT_DETECTED;
}
if (dup) {
process_delay_resp(p, dup);
}
break;
case PDELAY_RESP_FOLLOW_UP:
break;
case ANNOUNCE:
if (tc_forward(p, msg)) {
event = EV_FAULT_DETECTED;
break;
}
if (dup && process_announce(p, dup)) {
event = EV_STATE_DECISION_EVENT;
}
break;
case SIGNALING:
case MANAGEMENT:
if (tc_forward(p, msg)) {
event = EV_FAULT_DETECTED;
}
break;
}
msg_put(msg);
if (dup) {
msg_put(dup);
}
return event;
}
|
