starlingx/integ
Code Issues Proposed changes
integ/base/linuxptp/debian/patches/0029-pmc_agent-Generalize-the-method-that-queries-the-loc.patch
Andre Mauricio Zelak deeacbcdf3 Redundant HA PTP timing clock sources support 
Enhanced phc2sys to support multiple PTP timing clock sources, to
select the best clock source available according to the clocks
statuses.

A series of changes were patched back from a newer version of the
linuxptp package. They contain the support for multiple pmc nodes,
necessary to communicate with multiple ptp4l instances.

The phc2sys is now able to automatically select the best clock
according to the clocks statuses, and also monitors any clock
status change and act to keep the system synchronized to the
best clock source available.

A new set of configuration options were added to control the behavior
of the automatic clock selection algorithm and to configure the clock
source interfaces.

And a new command interface was added to phc2sys to gather statuses
about the clocks configured and the HA algorithm. This interface also
provides commands to control the clock source selection for debug and
maintenance proposes.

Test plan:
PASS: Verify the linuxptp package is built containing all the patches.
PASS: Verify the .deb package produced in the build install and that
all the PTP different deployments new and existing are OK.
PASS: Verify that a new image containing the linuxptp packed can be
installed and that all the PTP different deployments new and existing
are OK.

Story: 2010723
Task: 48642
Change-Id: Ic8c4d9bd335c582a91f1f4418947a81fc5e8b4f9
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
2023-08-18 10:05:14 -03:00

184 lines
5.6 KiB
Diff
Raw Blame History

From 3e6dd047083625ca03df9b4bbdc781e7dd079ff2 Mon Sep 17 00:00:00 2001
From: Andre Mauricio Zelak <andre.zelak@windriver.com>
Date: Mon, 12 Jun 2023 17:29:30 -0300
Subject: [PATCH 29/47] pmc_agent: Generalize the method that queries the local
clock identity.
When started in automatic mode, the phc2sys program first queries the
local clock identification and then the number of ports immediately
afterwords. However, both of those values come from the default data
set. Make code both simpler and more efficient by caching the entire
data set inside of the agent.
A subsequent patch will fix the run_pmc_get_number_ports() method to
return the cached result.
The active word in the function's name is "query" rather that "get" in
order to distinguish methods that send and receive over the network
from those that merely return a cached value.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
[commit 919703eb06b7ee9679308597e01e1da0162736d7 upstream]
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
---
phc2sys.c | 20 +++++++++++---------
pmc_agent.c | 46 +++++++++++++++++++++++-----------------------
pmc_agent.h | 15 ++++++++++++++-
3 files changed, 48 insertions(+), 33 deletions(-)
diff --git a/phc2sys.c b/phc2sys.c
index 32e6e13..0f33630 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -854,23 +854,25 @@ static int phc2sys_recv_subscribed(void *context, struct ptp_message *msg,
static int auto_init_ports(struct phc2sys_private *priv, int add_rt)
{
- int err, number_ports, res;
- int state, timestamping;
+ int err, number_ports, state, timestamping;
char iface[IFNAMSIZ];
struct clock *clock;
struct port *port;
unsigned int i;
while (1) {
- if (!is_running())
+ if (!is_running()) {
return -1;
- res = run_pmc_clock_identity(priv->node, 1000);
- if (res < 0)
- return -1;
- if (res > 0)
+ }
+ err = pmc_agent_query_dds(priv->node, 1000);
+ if (!err) {
break;
- /* res == 0, timeout */
- pr_notice("Waiting for ptp4l...");
+ }
+ if (err == -ETIMEDOUT) {
+ pr_notice("Waiting for ptp4l...");
+ } else {
+ return -1;
+ }
}
number_ports = run_pmc_get_number_ports(priv->node, 1000);
diff --git a/pmc_agent.c b/pmc_agent.c
index cc729ab..51023d1 100644
--- a/pmc_agent.c
+++ b/pmc_agent.c
@@ -38,8 +38,8 @@ struct pmc_agent {
struct pmc *pmc;
uint64_t pmc_last_update;
- struct ClockIdentity clock_identity;
- int clock_identity_set;
+ struct defaultDS dds;
+ bool dds_valid;
int leap;
int pmc_ds_requested;
bool stay_subscribed;
@@ -63,10 +63,11 @@ static void send_subscription(struct pmc_agent *node)
static int check_clock_identity(struct pmc_agent *node, struct ptp_message *msg)
{
- if (!node->clock_identity_set)
+ if (!node->dds_valid) {
return 1;
- return cid_eq(&node->clock_identity,
- &msg->header.sourcePortIdentity.clockIdentity);
+ }
+ return cid_eq(&node->dds.clockIdentity,
+ &msg->header.sourcePortIdentity.clockIdentity);
}
static int is_msg_mgt(struct ptp_message *msg)
@@ -251,24 +252,6 @@ void run_pmc_events(struct pmc_agent *node)
run_pmc(node, 0, -1, &msg);
}
-int run_pmc_clock_identity(struct pmc_agent *node, int timeout)
-{
- struct ptp_message *msg;
- struct defaultDS *dds;
- int res;
-
- res = run_pmc(node, timeout, TLV_DEFAULT_DATA_SET, &msg);
- if (res <= 0)
- return res;
-
- dds = (struct defaultDS *) management_tlv_data(msg);
- memcpy(&node->clock_identity, &dds->clockIdentity,
- sizeof(struct ClockIdentity));
- node->clock_identity_set = 1;
- msg_put(msg);
- return 1;
-}
-
int init_pmc_node(struct config *cfg, struct pmc_agent *node, const char *uds,
pmc_node_recv_subscribed_t *recv_subscribed, void *context)
{
@@ -317,6 +300,23 @@ int pmc_agent_get_sync_offset(struct pmc_agent *agent)
return agent->sync_offset;
}
+int pmc_agent_query_dds(struct pmc_agent *node, int timeout)
+{
+ struct ptp_message *msg;
+ struct defaultDS *dds;
+ int res;
+
+ res = run_pmc(node, timeout, TLV_DEFAULT_DATA_SET, &msg);
+ if (is_run_pmc_error(res)) {
+ return run_pmc_err2errno(res);
+ }
+ dds = (struct defaultDS *) management_tlv_data(msg);
+ memcpy(&node->dds, dds, sizeof(node->dds));
+ node->dds_valid = true;
+ msg_put(msg);
+ return 0;
+}
+
int pmc_agent_query_port_properties(struct pmc_agent *node, int timeout,
unsigned int port, int *state,
int *tstamping, char *iface)
diff --git a/pmc_agent.h b/pmc_agent.h
index ea37bf9..9d8bd1c 100644
--- a/pmc_agent.h
+++ b/pmc_agent.h
@@ -33,7 +33,6 @@ typedef int pmc_node_recv_subscribed_t(void *context, struct ptp_message *msg,
int init_pmc_node(struct config *cfg, struct pmc_agent *agent, const char *uds,
pmc_node_recv_subscribed_t *recv_subscribed, void *context);
-int run_pmc_clock_identity(struct pmc_agent *agent, int timeout);
int run_pmc_wait_sync(struct pmc_agent *agent, int timeout);
int run_pmc_get_number_ports(struct pmc_agent *agent, int timeout);
void run_pmc_events(struct pmc_agent *agent);
@@ -70,6 +69,20 @@ int pmc_agent_get_leap(struct pmc_agent *agent);
*/
int pmc_agent_get_sync_offset(struct pmc_agent *agent);
+/**
+ * Queries the local clock's default data set from the ptp4l service.
+ * The result of the query will be cached inside of the agent.
+ *
+ * In addition:
+ *
+ * - The port state notification callback might be invoked.
+ *
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @param timeout Transmit and receive timeout in milliseconds.
+ * @return Zero on success, negative error code otherwise.
+ */
+int pmc_agent_query_dds(struct pmc_agent *agent, int timeout);
+
/**
* Queries the port properties of a given port from the ptp4l service.
*
--
2.25.1
View Git Blame Copy Permalink