starlingx/integ
Code Issues Proposed changes
integ/base/linuxptp/debian/patches/0025-pmc_agent-Rename-the-update-method-and-attempt-to-do.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A series of changes were patched back from a newer version of the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

156 lines
4.7 KiB
Diff
Raw Blame History

From a304d4df86a76c187fc7074755fe9b5ad349efbe Mon Sep 17 00:00:00 2001
From: Andre Mauricio Zelak <andre.zelak@windriver.com>
Date: Mon, 12 Jun 2023 15:36:38 -0300
Subject: [PATCH 25/47] pmc_agent: Rename the update method and attempt to
document it.
This patch renames the function to have the module prefix and tries to
put into words what it does.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
[commit 9a2dae984e0d355d751913e3308f9a954da11aa3 upstream]
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
---
phc2sys.c | 4 ++--
pmc_agent.c | 53 ++++++++++++++++++++++++++---------------------------
pmc_agent.h | 21 ++++++++++++++++++++-
3 files changed, 48 insertions(+), 30 deletions(-)
diff --git a/phc2sys.c b/phc2sys.c
index b155961..cbe80f2 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -672,7 +672,7 @@ static int do_pps_loop(struct phc2sys_private *priv, struct clock *clock,
pps_offset = pps_ts - phc_ts;
}
- if (update_pmc_node(priv->node) < 0)
+ if (pmc_agent_update(priv->node) < 0)
continue;
update_clock(priv, clock, pps_offset, pps_ts, -1);
}
@@ -711,7 +711,7 @@ static int do_loop(struct phc2sys_private *priv, int subscriptions)
while (is_running()) {
clock_nanosleep(CLOCK_MONOTONIC, 0, &interval, NULL);
- if (update_pmc_node(priv->node) < 0) {
+ if (pmc_agent_update(priv->node) < 0) {
continue;
}
diff --git a/pmc_agent.c b/pmc_agent.c
index ea6b3b7..22af306 100644
--- a/pmc_agent.c
+++ b/pmc_agent.c
@@ -336,33 +336,6 @@ int run_pmc_clock_identity(struct pmc_agent *node, int timeout)
return 1;
}
-/* Returns: -1 in case of error, 0 otherwise */
-int update_pmc_node(struct pmc_agent *node)
-{
- struct timespec tp;
- uint64_t ts;
-
- if (!node->pmc) {
- return 0;
- }
- if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
- pr_err("failed to read clock: %m");
- return -1;
- }
- ts = tp.tv_sec * NS_PER_SEC + tp.tv_nsec;
-
- if (ts - node->pmc_last_update >= PMC_UPDATE_INTERVAL) {
- if (node->stay_subscribed) {
- renew_subscription(node, 0);
- }
- if (run_pmc_get_utc_offset(node, 0) > 0) {
- node->pmc_last_update = ts;
- }
- }
-
- return 0;
-}
-
int init_pmc_node(struct config *cfg, struct pmc_agent *node, const char *uds,
pmc_node_recv_subscribed_t *recv_subscribed, void *context)
{
@@ -414,6 +387,32 @@ int pmc_agent_subscribe(struct pmc_agent *node, int timeout)
return renew_subscription(node, timeout);
}
+int pmc_agent_update(struct pmc_agent *node)
+{
+ struct timespec tp;
+ uint64_t ts;
+
+ if (!node->pmc) {
+ return 0;
+ }
+ if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
+ pr_err("failed to read clock: %m");
+ return -errno;
+ }
+ ts = tp.tv_sec * NS_PER_SEC + tp.tv_nsec;
+
+ if (ts - node->pmc_last_update >= PMC_UPDATE_INTERVAL) {
+ if (node->stay_subscribed) {
+ renew_subscription(node, 0);
+ }
+ if (run_pmc_get_utc_offset(node, 0) > 0) {
+ node->pmc_last_update = ts;
+ }
+ }
+
+ return 0;
+}
+
bool pmc_agent_utc_offset_traceable(struct pmc_agent *agent)
{
return agent->utc_offset_traceable;
diff --git a/pmc_agent.h b/pmc_agent.h
index 743818f..483a21b 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 update_pmc_node(struct pmc_agent *agent);
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);
@@ -85,6 +84,26 @@ void pmc_agent_set_sync_offset(struct pmc_agent *agent, int offset);
*/
int pmc_agent_subscribe(struct pmc_agent *agent, int timeout);
+/**
+ * Queries the local ptp4l instance to update the TAI-UTC offset and
+ * the current leap second flags.
+ *
+ * In addition:
+ *
+ * - Any active port state subscription will be renewed.
+ * - The port state notification callback might be invoked.
+ *
+ * This function should be called periodically at least once per
+ * minute to keep both the port state and the leap second flags up to
+ * date. Note that the PMC agent rate limits the query to once per
+ * minute, and so the caller may safely invoke this method more often
+ * than that.
+ *
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @return Zero on success, negative error code otherwise.
+ */
+int pmc_agent_update(struct pmc_agent *agent);
+
/**
* Tests whether the current UTC offset is traceable.
* @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
--
2.25.1
View Git Blame Copy Permalink