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port.c
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port.c
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/**
* @file port.c
* @note Copyright (C) 2011 Richard Cochran <[email protected]>
*
* 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 02110-1301 USA.
*/
#include <arpa/inet.h>
#include <errno.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "bmc.h"
#include "clock.h"
#include "mave.h"
#include "missing.h"
#include "msg.h"
#include "port.h"
#include "print.h"
#include "sk.h"
#include "tlv.h"
#include "tmtab.h"
#include "tmv.h"
#include "util.h"
#define ALLOWED_LOST_RESPONSES 3
#define PORT_MAVE_LENGTH 10
enum syfu_state {
SF_EMPTY,
SF_HAVE_SYNC,
SF_HAVE_FUP,
};
enum syfu_event {
SYNC_MISMATCH,
SYNC_MATCH,
FUP_MISMATCH,
FUP_MATCH,
};
struct nrate_estimator {
double ratio;
tmv_t origin1;
tmv_t ingress1;
unsigned int max_count;
unsigned int count;
};
struct port {
char *name;
struct clock *clock;
struct transport *trp;
enum timestamp_type timestamping;
struct fdarray fda;
struct foreign_clock *best;
enum syfu_state syfu;
struct ptp_message *last_syncfup;
struct ptp_message *delay_req;
struct ptp_message *peer_delay_req;
struct ptp_message *peer_delay_resp;
struct ptp_message *peer_delay_fup;
int peer_portid_valid;
struct PortIdentity peer_portid;
struct {
UInteger16 announce;
UInteger16 delayreq;
UInteger16 sync;
} seqnum;
struct tmtab tmtab;
tmv_t peer_delay;
struct mave *avg_delay;
int log_sync_interval;
struct nrate_estimator nrate;
unsigned int pdr_missing;
unsigned int multiple_seq_pdr_count;
unsigned int multiple_pdr_detected;
/* portDS */
struct port_defaults pod;
struct PortIdentity portIdentity;
enum port_state state; /*portState*/
int asCapable;
Integer8 logMinDelayReqInterval;
TimeInterval peerMeanPathDelay;
Integer8 logAnnounceInterval;
UInteger8 announceReceiptTimeout;
UInteger8 transportSpecific;
Integer8 logSyncInterval;
Enumeration8 delayMechanism;
Integer8 logMinPdelayReqInterval;
UInteger32 neighborPropDelayThresh;
enum fault_type last_fault_type;
unsigned int versionNumber; /*UInteger4*/
/* foreignMasterDS */
LIST_HEAD(fm, foreign_clock) foreign_masters;
};
#define portnum(p) (p->portIdentity.portNumber)
#define NSEC2SEC 1000000000LL
static int port_capable(struct port *p);
static int port_is_ieee8021as(struct port *p);
static void port_nrate_initialize(struct port *p);
static int announce_compare(struct ptp_message *m1, struct ptp_message *m2)
{
struct announce_msg *a = &m1->announce, *b = &m2->announce;
int len =
sizeof(a->grandmasterPriority1) +
sizeof(a->grandmasterClockQuality) +
sizeof(a->grandmasterPriority2) +
sizeof(a->grandmasterIdentity) +
sizeof(a->stepsRemoved);
return memcmp(&a->grandmasterPriority1, &b->grandmasterPriority1, len);
}
static void announce_to_dataset(struct ptp_message *m, struct clock *c,
struct dataset *out)
{
struct announce_msg *a = &m->announce;
out->priority1 = a->grandmasterPriority1;
out->identity = a->grandmasterIdentity;
out->quality = a->grandmasterClockQuality;
out->priority2 = a->grandmasterPriority2;
out->stepsRemoved = a->stepsRemoved;
out->sender = m->header.sourcePortIdentity;
out->receiver = clock_parent_identity(c);
}
static int msg_current(struct ptp_message *m, struct timespec now)
{
int64_t t1, t2, tmo;
t1 = m->ts.host.tv_sec * NSEC2SEC + m->ts.host.tv_nsec;
t2 = now.tv_sec * NSEC2SEC + now.tv_nsec;
if (m->header.logMessageInterval < 0)
tmo = 4LL * NSEC2SEC / (1 << -m->header.logMessageInterval);
else
tmo = 4LL * (1 << m->header.logMessageInterval) * NSEC2SEC;
return t2 - t1 < tmo;
}
static int msg_source_equal(struct ptp_message *m1, struct foreign_clock *fc)
{
struct PortIdentity *id1, *id2;
id1 = &m1->header.sourcePortIdentity;
id2 = &fc->dataset.sender;
return 0 == memcmp(id1, id2, sizeof(*id1));
}
static int pid_eq(struct PortIdentity *a, struct PortIdentity *b)
{
return 0 == memcmp(a, b, sizeof(*a));
}
static int source_pid_eq(struct ptp_message *m1, struct ptp_message *m2)
{
return pid_eq(&m1->header.sourcePortIdentity,
&m2->header.sourcePortIdentity);
}
enum fault_type last_fault_type(struct port *port)
{
return port->last_fault_type;
}
int fault_interval(struct port *port, enum fault_type ft,
struct fault_interval *i)
{
if (!port || !i)
return -EINVAL;
if (ft < 0 || ft >= FT_CNT)
return -EINVAL;
i->type = port->pod.flt_interval_pertype[ft].type;
i->val = port->pod.flt_interval_pertype[ft].val;
return 0;
}
int set_tmo_log(int fd, unsigned int scale, int log_seconds)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
uint64_t ns;
int i;
if (log_seconds < 0) {
log_seconds *= -1;
for (i = 1, ns = scale * 500000000ULL; i < log_seconds; i++) {
ns >>= 1;
}
tmo.it_value.tv_nsec = ns;
while (tmo.it_value.tv_nsec >= NS_PER_SEC) {
tmo.it_value.tv_nsec -= NS_PER_SEC;
tmo.it_value.tv_sec++;
}
} else
tmo.it_value.tv_sec = scale * (1 << log_seconds);
return timerfd_settime(fd, 0, &tmo, NULL);
}
int set_tmo_lin(int fd, int seconds)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
tmo.it_value.tv_sec = seconds;
return timerfd_settime(fd, 0, &tmo, NULL);
}
static void fc_clear(struct foreign_clock *fc)
{
struct ptp_message *m;
while (fc->n_messages) {
m = TAILQ_LAST(&fc->messages, messages);
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
}
static void fc_prune(struct foreign_clock *fc)
{
struct timespec now;
struct ptp_message *m;
clock_gettime(CLOCK_MONOTONIC, &now);
while (fc->n_messages > FOREIGN_MASTER_THRESHOLD) {
m = TAILQ_LAST(&fc->messages, messages);
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
while (!TAILQ_EMPTY(&fc->messages)) {
m = TAILQ_LAST(&fc->messages, messages);
if (msg_current(m, now))
break;
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
}
static void ts_to_timestamp(struct timespec *src, struct Timestamp *dst)
{
dst->seconds_lsb = src->tv_sec;
dst->seconds_msb = 0;
dst->nanoseconds = src->tv_nsec;
}
/*
* Returns non-zero if the announce message is different than last.
*/
static int add_foreign_master(struct port *p, struct ptp_message *m)
{
struct foreign_clock *fc;
struct ptp_message *tmp;
int broke_threshold = 0, diff = 0;
LIST_FOREACH(fc, &p->foreign_masters, list) {
if (msg_source_equal(m, fc))
break;
}
if (!fc) {
pr_notice("port %hu: new foreign master %s", portnum(p),
pid2str(&m->header.sourcePortIdentity));
fc = malloc(sizeof(*fc));
if (!fc) {
pr_err("low memory, failed to add foreign master");
return 0;
}
memset(fc, 0, sizeof(*fc));
LIST_INSERT_HEAD(&p->foreign_masters, fc, list);
fc->port = p;
fc->dataset.sender = m->header.sourcePortIdentity;
/* We do not count this first message, see 9.5.3(b) */
return 0;
}
/*
* If this message breaks the threshold, that is an important change.
*/
fc_prune(fc);
if (FOREIGN_MASTER_THRESHOLD - 1 == fc->n_messages)
broke_threshold = 1;
/*
* Okay, go ahead and add this announcement.
*/
msg_get(m);
fc->n_messages++;
TAILQ_INSERT_HEAD(&fc->messages, m, list);
/*
* Test if this announcement contains changed information.
*/
if (fc->n_messages > 1) {
tmp = TAILQ_NEXT(m, list);
diff = announce_compare(m, tmp);
}
return broke_threshold || diff;
}
static int follow_up_info_append(struct port *p, struct ptp_message *m)
{
struct follow_up_info_tlv *fui;
fui = (struct follow_up_info_tlv *) m->follow_up.suffix;
fui->type = TLV_ORGANIZATION_EXTENSION;
fui->length = sizeof(*fui) - sizeof(fui->type) - sizeof(fui->length);
memcpy(fui->id, ieee8021_id, sizeof(ieee8021_id));
fui->subtype[2] = 1;
m->tlv_count = 1;
return sizeof(*fui);
}
static struct follow_up_info_tlv *follow_up_info_extract(struct ptp_message *m)
{
struct follow_up_info_tlv *f;
f = (struct follow_up_info_tlv *) m->follow_up.suffix;
if (m->tlv_count != 1 ||
f->type != TLV_ORGANIZATION_EXTENSION ||
f->length != sizeof(*f) - sizeof(f->type) - sizeof(f->length) ||
// memcmp(f->id, ieee8021_id, sizeof(ieee8021_id)) ||
f->subtype[0] || f->subtype[1] || f->subtype[2] != 1) {
return NULL;
}
return f;
}
static void free_foreign_masters(struct port *p)
{
struct foreign_clock *fc;
while ((fc = LIST_FIRST(&p->foreign_masters)) != NULL) {
LIST_REMOVE(fc, list);
fc_clear(fc);
free(fc);
}
}
static int incapable_ignore(struct port *p, struct ptp_message *m)
{
if (port_capable(p)) {
return 0;
}
if (msg_type(m) == ANNOUNCE || msg_type(m) == SYNC) {
return 1;
}
return 0;
}
static int path_trace_append(struct port *p, struct ptp_message *m,
struct parent_ds *dad)
{
struct path_trace_tlv *ptt;
int length = 1 + dad->path_length;
if (length > PATH_TRACE_MAX) {
return 0;
}
ptt = (struct path_trace_tlv *) m->announce.suffix;
ptt->type = TLV_PATH_TRACE;
ptt->length = length * sizeof(struct ClockIdentity);
memcpy(ptt->cid, dad->ptl, ptt->length);
ptt->cid[length - 1] = clock_identity(p->clock);
m->tlv_count = 1;
return ptt->length + sizeof(ptt->type) + sizeof(ptt->length);
}
static int path_trace_ignore(struct port *p, struct ptp_message *m)
{
struct ClockIdentity cid;
struct path_trace_tlv *ptt;
int i, cnt;
if (!p->pod.path_trace_enabled) {
return 0;
}
if (msg_type(m) != ANNOUNCE) {
return 0;
}
if (m->tlv_count != 1) {
return 1;
}
ptt = (struct path_trace_tlv *) m->announce.suffix;
if (ptt->type != TLV_PATH_TRACE) {
return 1;
}
cnt = path_length(ptt);
cid = clock_identity(p->clock);
for (i = 0; i < cnt; i++) {
if (0 == memcmp(&ptt->cid[i], &cid, sizeof(cid)))
return 1;
}
return 0;
}
static int port_capable(struct port *p)
{
if (!port_is_ieee8021as(p)) {
/* Normal 1588 ports are always capable. */
goto capable;
}
if (tmv_to_nanoseconds(p->peer_delay) > p->neighborPropDelayThresh) {
if (p->asCapable)
pr_debug("port %hu: peer_delay (%lld) > neighborPropDelayThresh "
"(%lld), resetting asCapable", portnum(p),
tmv_to_nanoseconds(p->peer_delay),
p->neighborPropDelayThresh);
goto not_capable;
}
if (p->pdr_missing > ALLOWED_LOST_RESPONSES) {
if (p->asCapable)
pr_debug("port %hu: missed %d peer delay resp, "
"resetting asCapable", portnum(p), p->pdr_missing);
goto not_capable;
}
if (p->multiple_seq_pdr_count) {
if (p->asCapable)
pr_debug("port %hu: multiple sequential peer delay resp, "
"resetting asCapable", portnum(p));
goto not_capable;
}
if (!p->peer_portid_valid) {
if (p->asCapable)
pr_debug("port %hu: invalid peer port id, "
"resetting asCapable", portnum(p));
goto not_capable;
}
capable:
if (!p->asCapable)
pr_debug("port %hu: setting asCapable", portnum(p));
p->asCapable = 1;
return 1;
not_capable:
if (p->asCapable)
port_nrate_initialize(p);
p->asCapable = 0;
return 0;
}
static int port_clr_tmo(int fd)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
return timerfd_settime(fd, 0, &tmo, NULL);
}
static int port_ignore(struct port *p, struct ptp_message *m)
{
struct ClockIdentity c1, c2;
if (incapable_ignore(p, m)) {
return 1;
}
if (path_trace_ignore(p, m)) {
return 1;
}
if (msg_transport_specific(m) != p->transportSpecific) {
return 1;
}
if (pid_eq(&m->header.sourcePortIdentity, &p->portIdentity)) {
return 1;
}
if (m->header.domainNumber != clock_domain_number(p->clock)) {
return 1;
}
c1 = clock_identity(p->clock);
c2 = m->header.sourcePortIdentity.clockIdentity;
if (0 == memcmp(&c1, &c2, sizeof(c1))) {
return 1;
}
return 0;
}
static int port_is_ieee8021as(struct port *p)
{
return p->pod.follow_up_info ? 1 : 0;
}
static void port_management_send_error(struct port *p, struct port *ingress,
struct ptp_message *msg, int error_id)
{
if (port_management_error(p->portIdentity, ingress, msg, error_id))
pr_err("port %hu: management error failed", portnum(p));
}
static const Octet profile_id_drr[] = {0x00, 0x1B, 0x19, 0x00, 0x01, 0x00};
static const Octet profile_id_p2p[] = {0x00, 0x1B, 0x19, 0x00, 0x02, 0x00};
static int port_management_get_response(struct port *target,
struct port *ingress, int id,
struct ptp_message *req)
{
int datalen = 0, err, pdulen, respond = 0;
struct management_tlv *tlv;
struct management_tlv_datum *mtd;
struct ptp_message *rsp;
struct portDS *pds;
struct PortIdentity pid = port_identity(target);
struct clock_description *desc;
struct mgmt_clock_description *cd;
uint8_t *buf;
uint16_t u16;
rsp = port_management_reply(pid, ingress, req);
if (!rsp) {
return 0;
}
tlv = (struct management_tlv *) rsp->management.suffix;
tlv->type = TLV_MANAGEMENT;
tlv->id = id;
switch (id) {
case NULL_MANAGEMENT:
datalen = 0;
respond = 1;
break;
case CLOCK_DESCRIPTION:
cd = &rsp->last_tlv.cd;
buf = tlv->data;
cd->clockType = (UInteger16 *) buf;
buf += sizeof(*cd->clockType);
if (clock_num_ports(target->clock) > 1) {
*cd->clockType = CLOCK_TYPE_BOUNDARY;
} else {
*cd->clockType = CLOCK_TYPE_ORDINARY;
}
cd->physicalLayerProtocol = (struct PTPText *) buf;
switch(transport_type(target->trp)) {
case TRANS_UDP_IPV4:
case TRANS_UDP_IPV6:
case TRANS_IEEE_802_3:
ptp_text_set(cd->physicalLayerProtocol, "IEEE 802.3");
break;
default:
ptp_text_set(cd->physicalLayerProtocol, NULL);
break;
}
buf += sizeof(struct PTPText) + cd->physicalLayerProtocol->length;
cd->physicalAddress = (struct PhysicalAddress *) buf;
u16 = transport_physical_addr(target->trp,
cd->physicalAddress->address);
memcpy(&cd->physicalAddress->length, &u16, 2);
buf += sizeof(struct PhysicalAddress) + u16;
cd->protocolAddress = (struct PortAddress *) buf;
u16 = transport_type(target->trp);
memcpy(&cd->protocolAddress->networkProtocol, &u16, 2);
u16 = transport_protocol_addr(target->trp,
cd->protocolAddress->address);
memcpy(&cd->protocolAddress->addressLength, &u16, 2);
buf += sizeof(struct PortAddress) + u16;
desc = clock_description(target->clock);
cd->manufacturerIdentity = buf;
memcpy(cd->manufacturerIdentity,
desc->manufacturerIdentity, OUI_LEN);
buf += OUI_LEN;
*(buf++) = 0; /* reserved */
cd->productDescription = (struct PTPText *) buf;
ptp_text_copy(cd->productDescription, &desc->productDescription);
buf += sizeof(struct PTPText) + cd->productDescription->length;
cd->revisionData = (struct PTPText *) buf;
ptp_text_copy(cd->revisionData, &desc->revisionData);
buf += sizeof(struct PTPText) + cd->revisionData->length;
cd->userDescription = (struct PTPText *) buf;
ptp_text_copy(cd->userDescription, &desc->userDescription);
buf += sizeof(struct PTPText) + cd->userDescription->length;
if (target->delayMechanism == DM_P2P) {
memcpy(buf, profile_id_p2p, PROFILE_ID_LEN);
} else {
memcpy(buf, profile_id_drr, PROFILE_ID_LEN);
}
buf += PROFILE_ID_LEN;
datalen = buf - tlv->data;
respond = 1;
break;
case PORT_DATA_SET:
pds = (struct portDS *) tlv->data;
pds->portIdentity = target->portIdentity;
if (target->state == PS_GRAND_MASTER) {
pds->portState = PS_MASTER;
} else {
pds->portState = target->state;
}
pds->logMinDelayReqInterval = target->logMinDelayReqInterval;
pds->peerMeanPathDelay = target->peerMeanPathDelay;
pds->logAnnounceInterval = target->logAnnounceInterval;
pds->announceReceiptTimeout = target->announceReceiptTimeout;
pds->logSyncInterval = target->logSyncInterval;
if (target->delayMechanism) {
pds->delayMechanism = target->delayMechanism;
} else {
pds->delayMechanism = DM_E2E;
}
pds->logMinPdelayReqInterval = target->logMinPdelayReqInterval;
pds->versionNumber = target->versionNumber;
datalen = sizeof(*pds);
respond = 1;
break;
case LOG_ANNOUNCE_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logAnnounceInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
case ANNOUNCE_RECEIPT_TIMEOUT:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->announceReceiptTimeout;
datalen = sizeof(*mtd);
respond = 1;
break;
case LOG_SYNC_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logSyncInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
case VERSION_NUMBER:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->versionNumber;
datalen = sizeof(*mtd);
respond = 1;
break;
case DELAY_MECHANISM:
mtd = (struct management_tlv_datum *) tlv->data;
if (target->delayMechanism)
mtd->val = target->delayMechanism;
else
mtd->val = DM_E2E;
datalen = sizeof(*mtd);
respond = 1;
break;
case LOG_MIN_PDELAY_REQ_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logMinPdelayReqInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
}
if (respond) {
if (datalen % 2) {
tlv->data[datalen] = 0;
datalen++;
}
tlv->length = sizeof(tlv->id) + datalen;
pdulen = rsp->header.messageLength + sizeof(*tlv) + datalen;
rsp->header.messageLength = pdulen;
rsp->tlv_count = 1;
err = msg_pre_send(rsp);
if (err) {
goto out;
}
err = port_forward(ingress, rsp, pdulen);
}
out:
msg_put(rsp);
return respond ? 1 : 0;
}
static int port_management_set(struct port *target,
struct port *ingress, int id,
struct ptp_message *req)
{
int respond = 0;
switch (id) {
}
if (respond && !port_management_get_response(target, ingress, id, req))
pr_err("port %hu: failed to send management set response", portnum(target));
return respond ? 1 : 0;
}
static void port_nrate_calculate(struct port *p, tmv_t t3, tmv_t t4, tmv_t c)
{
tmv_t origin2;
struct nrate_estimator *n = &p->nrate;
if (!n->ingress1) {
n->ingress1 = t4;
n->origin1 = tmv_add(t3, c);
return;
}
n->count++;
if (n->count < n->max_count) {
return;
}
origin2 = tmv_add(t3, c);
if (tmv_eq(t4, n->ingress1)) {
pr_warning("bad timestamps in nrate calculation");
return;
}
n->ratio =
tmv_dbl(tmv_sub(origin2, n->origin1)) /
tmv_dbl(tmv_sub(t4, n->ingress1));
n->ingress1 = t4;
n->origin1 = origin2;
n->count = 0;
/*
* We experienced a successful series of exchanges of peer
* delay request and response, and so the port is now capable.
*/
p->pdr_missing = 0;
}
static void port_nrate_initialize(struct port *p)
{
int shift = p->pod.freq_est_interval - p->logMinPdelayReqInterval;
if (shift < 0)
shift = 0;
else if (shift >= sizeof(int) * 8) {
shift = sizeof(int) * 8 - 1;
pr_warning("freq_est_interval is too long");
}
/* We start in the 'incapable' state. */
p->pdr_missing = ALLOWED_LOST_RESPONSES + 1;
p->asCapable = 0;
p->peer_portid_valid = 0;
p->nrate.origin1 = tmv_zero();
p->nrate.ingress1 = tmv_zero();
p->nrate.max_count = (1 << shift);
p->nrate.count = 0;
}
static int port_set_announce_tmo(struct port *p)
{
return set_tmo_log(p->fda.fd[FD_ANNOUNCE_TIMER],
p->announceReceiptTimeout, p->logAnnounceInterval);
}
static int port_set_delay_tmo(struct port *p)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
int index;
if (p->delayMechanism == DM_P2P) {
return set_tmo_log(p->fda.fd[FD_DELAY_TIMER], 1,
p->logMinPdelayReqInterval);
}
index = random() % TMTAB_MAX;
tmo.it_value = p->tmtab.ts[index];
return timerfd_settime(p->fda.fd[FD_DELAY_TIMER], 0, &tmo, NULL);
}
static int port_set_manno_tmo(struct port *p)
{
return set_tmo_log(p->fda.fd[FD_MANNO_TIMER], 1, p->logAnnounceInterval);
}
static int port_set_qualification_tmo(struct port *p)
{
return set_tmo_log(p->fda.fd[FD_QUALIFICATION_TIMER],
1+clock_steps_removed(p->clock), p->logAnnounceInterval);
}
static int port_set_sync_tmo(struct port *p)
{
return set_tmo_log(p->fda.fd[FD_SYNC_TIMER], 1, p->logSyncInterval);
}
static void port_show_transition(struct port *p,
enum port_state next, enum fsm_event event)
{
if (event == EV_FAULT_DETECTED) {
pr_notice("port %hu: %s to %s on %s (%s)", portnum(p),
ps_str[p->state], ps_str[next], ev_str[event],
ft_str(last_fault_type(p)));
} else {
pr_notice("port %hu: %s to %s on %s", portnum(p),
ps_str[p->state], ps_str[next], ev_str[event]);
}
}
static void port_slave_priority_warning(struct port *p)
{
UInteger16 n = portnum(p);
pr_warning("port %hu: master state recommended in slave only mode", n);
pr_warning("port %hu: defaultDS.priority1 probably misconfigured", n);
}
static void port_synchronize(struct port *p,
struct timespec ingress_ts,
struct timestamp origin_ts,
Integer64 correction1, Integer64 correction2)
{
enum servo_state state;
state = clock_synchronize(p->clock, ingress_ts, origin_ts,
correction1, correction2);
switch (state) {
case SERVO_UNLOCKED:
port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);
break;
case SERVO_JUMP:
port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);
if (p->delay_req) {
msg_put(p->delay_req);
p->delay_req = NULL;
}
if (p->peer_delay_req) {
msg_put(p->peer_delay_req);
p->peer_delay_req = NULL;
}
break;
case SERVO_LOCKED:
port_dispatch(p, EV_MASTER_CLOCK_SELECTED, 0);
break;
}
}
/*
* Handle out of order packets. The network stack might
* provide the follow up _before_ the sync message. After all,
* they can arrive on two different ports. In addition, time
* stamping in PHY devices might delay the event packets.
*/
static void port_syfufsm(struct port *p, enum syfu_event event,
struct ptp_message *m)
{
struct ptp_message *syn, *fup;
switch (p->syfu) {
case SF_EMPTY:
switch (event) {
case SYNC_MISMATCH:
msg_get(m);
p->last_syncfup = m;
p->syfu = SF_HAVE_SYNC;
break;
case FUP_MISMATCH:
msg_get(m);
p->last_syncfup = m;
p->syfu = SF_HAVE_FUP;
break;
case SYNC_MATCH:
break;
case FUP_MATCH:
break;
}
break;
case SF_HAVE_SYNC:
switch (event) {
case SYNC_MISMATCH:
msg_put(p->last_syncfup);
msg_get(m);
p->last_syncfup = m;
break;
case SYNC_MATCH:
break;
case FUP_MISMATCH:
msg_put(p->last_syncfup);
msg_get(m);
p->last_syncfup = m;
p->syfu = SF_HAVE_FUP;
break;
case FUP_MATCH:
syn = p->last_syncfup;
port_synchronize(p, syn->hwts.ts, m->ts.pdu,
syn->header.correction,
m->header.correction);
msg_put(p->last_syncfup);
p->syfu = SF_EMPTY;
break;
}
break;
case SF_HAVE_FUP:
switch (event) {
case SYNC_MISMATCH:
msg_put(p->last_syncfup);
msg_get(m);
p->last_syncfup = m;
p->syfu = SF_HAVE_SYNC;
break;
case SYNC_MATCH:
fup = p->last_syncfup;
port_synchronize(p, m->hwts.ts, fup->ts.pdu,
m->header.correction,
fup->header.correction);
msg_put(p->last_syncfup);
p->syfu = SF_EMPTY;
break;
case FUP_MISMATCH:
msg_put(p->last_syncfup);
msg_get(m);
p->last_syncfup = m;
break;
case FUP_MATCH:
break;
}
break;
}
}
static int port_pdelay_request(struct port *p)
{
struct ptp_message *msg;
int cnt, pdulen;
/* If multiple pdelay resp were not detected the counter can be reset */
if (!p->multiple_pdr_detected)
p->multiple_seq_pdr_count = 0;
p->multiple_pdr_detected = 0;
msg = msg_allocate();
if (!msg)
return -1;
pdulen = sizeof(struct pdelay_req_msg);
msg->hwts.type = p->timestamping;
msg->header.tsmt = PDELAY_REQ | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = pdulen;
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.correction = -p->pod.asymmetry;
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.delayreq++;
msg->header.control = CTL_OTHER;
msg->header.logMessageInterval = port_is_ieee8021as(p) ?
p->logMinPdelayReqInterval : 0x7f;
if (msg_pre_send(msg))
goto out;
cnt = transport_peer(p->trp, &p->fda, 1, msg, pdulen, &msg->hwts);
if (cnt <= 0) {
pr_err("port %hu: send peer delay request failed", portnum(p));
goto out;
}
if (msg_sots_missing(msg)) {
pr_err("missing timestamp on transmitted peer delay request");
goto out;
}
if (p->peer_delay_req) {
if (port_capable(p)) {
p->pdr_missing++;
}
msg_put(p->peer_delay_req);
}
p->peer_delay_req = msg;
return 0;
out:
msg_put(msg);
return -1;
}
static int port_delay_request(struct port *p)
{
struct ptp_message *msg;
int cnt, pdulen;