starlingx/integ
Code Issues Proposed changes
integ/base/linuxptp/debian/patches/0027-pmc_agent-Convert-the-method-that-queries-TAI-UTC-of.patch
Andre Mauricio Zelak 4a94f788a4 Select the clock matching requirements 
Fix clock selection algorithm behavior where a clock source starts
to match requirements but is not selected because it has the same
ha_priority than active.

In a HA configuration with two or more clocks configured with equal
ha_priority if no clock source matches the requirements the first one
in the configuration file is selected active. This is a standard
behavior to always have a clock source, even when they are not
synchronized.

When one of the clock sources starts to match the requirements it
must be selected active, regardless of the priority.

But when a second clock source starts to match the requirements and
has the same ha_priority as the active, the active remains the clock
source. There is no need to switch active when they have equal
ha_priority.

Test plan: two sources with the same priority
PASS: Verify a clock source is selected active when it starts to match
the requirements and the current active doesn't match them, even if
they have equal ha_priority.
PASS: Verify a clock source isn't selected active when it starts to
match the requirements and the current active also matches them.

Regression: two sources with different priority
PASS: Verify a clock source is selected active when it starts to match
the requirements and the current active doesn't match them, even if
their ha_priority is lower than the actives.
PASS: Verify a clock source is selected active when it starts to match
the requirements and the current active also matches them but has
lower ha_priority configured.
PASS: Verify a clock source isn't selected active when it starts to
match the requirements and the current active also matches them
and has higher ha_priority configured.

Story: 2010723
Task: 48699

Change-Id: If80532b7b8febcc164f7c748a8d4122b4f10fd3b
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
2023-09-05 11:26:10 -03:00

183 lines
5.4 KiB
Diff
Raw Blame History

From b8188a4fd51bc8983e5d19f18fe37b8ca39d03a6 Mon Sep 17 00:00:00 2001
From: Andre Mauricio Zelak <andre.zelak@windriver.com>
Date: Mon, 12 Jun 2023 17:20:04 -0300
Subject: [PATCH 27/50] pmc_agent: Convert the method that queries TAI-UTC
offset into the canonical form.
This patch renames the function to have the module prefix and corrects the
return code semantics.
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>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
[commit 943c8f51c56acb72277d1a9459bbf7b7a5ac5fe7 upstream]
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
---
phc2sys.c | 8 +++----
pmc_agent.c | 63 +++++++++++++++++++++++++++--------------------------
pmc_agent.h | 16 ++++++++++++--
3 files changed, 50 insertions(+), 37 deletions(-)
diff --git a/phc2sys.c b/phc2sys.c
index 3cafbb2..78d662b 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -720,7 +720,7 @@ static int do_loop(struct phc2sys_private *priv, int subscriptions)
if (priv->state_changed) {
/* force getting offset, as it may have
* changed after the port state change */
- if (run_pmc_get_utc_offset(priv->node, 1000) <= 0) {
+ if (pmc_agent_query_utc_offset(priv->node, 1000)) {
pr_err("failed to get UTC offset");
continue;
}
@@ -921,7 +921,7 @@ static int auto_init_ports(struct phc2sys_private *priv, int add_rt)
}
/* get initial offset */
- if (run_pmc_get_utc_offset(priv->node, 1000) <= 0) {
+ if (pmc_agent_query_utc_offset(priv->node, 1000)) {
pr_err("failed to get UTC offset");
return -1;
}
@@ -1330,8 +1330,8 @@ int main(int argc, char *argv[])
}
if (!priv.forced_sync_offset) {
- r = run_pmc_get_utc_offset(priv.node, 1000);
- if (r <= 0) {
+ r = pmc_agent_query_utc_offset(priv.node, 1000);
+ if (r) {
pr_err("failed to get UTC offset");
goto end;
}
diff --git a/pmc_agent.c b/pmc_agent.c
index 833d1c1..7a57a2f 100644
--- a/pmc_agent.c
+++ b/pmc_agent.c
@@ -228,36 +228,6 @@ int run_pmc_wait_sync(struct pmc_agent *node, int timeout)
}
}
-int run_pmc_get_utc_offset(struct pmc_agent *node, int timeout)
-{
- struct ptp_message *msg;
- int res;
- struct timePropertiesDS *tds;
-
- res = run_pmc(node, timeout, TLV_TIME_PROPERTIES_DATA_SET, &msg);
- if (res <= 0)
- return res;
-
- tds = (struct timePropertiesDS *) management_tlv_data(msg);
- if (tds->flags & PTP_TIMESCALE) {
- node->sync_offset = tds->currentUtcOffset;
- if (tds->flags & LEAP_61)
- node->leap = 1;
- else if (tds->flags & LEAP_59)
- node->leap = -1;
- else
- node->leap = 0;
- node->utc_offset_traceable = tds->flags & UTC_OFF_VALID &&
- tds->flags & TIME_TRACEABLE;
- } else {
- node->sync_offset = 0;
- node->leap = 0;
- node->utc_offset_traceable = 0;
- }
- msg_put(msg);
- return 1;
-}
-
int run_pmc_get_number_ports(struct pmc_agent *node, int timeout)
{
struct ptp_message *msg;
@@ -384,6 +354,37 @@ int pmc_agent_get_sync_offset(struct pmc_agent *agent)
return agent->sync_offset;
}
+int pmc_agent_query_utc_offset(struct pmc_agent *node, int timeout)
+{
+ struct timePropertiesDS *tds;
+ struct ptp_message *msg;
+ int res;
+
+ res = run_pmc(node, timeout, TLV_TIME_PROPERTIES_DATA_SET, &msg);
+ if (is_run_pmc_error(res)) {
+ return run_pmc_err2errno(res);
+ }
+
+ tds = (struct timePropertiesDS *) management_tlv_data(msg);
+ if (tds->flags & PTP_TIMESCALE) {
+ node->sync_offset = tds->currentUtcOffset;
+ if (tds->flags & LEAP_61)
+ node->leap = 1;
+ else if (tds->flags & LEAP_59)
+ node->leap = -1;
+ else
+ node->leap = 0;
+ node->utc_offset_traceable = tds->flags & UTC_OFF_VALID &&
+ tds->flags & TIME_TRACEABLE;
+ } else {
+ node->sync_offset = 0;
+ node->leap = 0;
+ node->utc_offset_traceable = 0;
+ }
+ msg_put(msg);
+ return 0;
+}
+
void pmc_agent_set_sync_offset(struct pmc_agent *agent, int offset)
{
agent->sync_offset = offset;
@@ -413,7 +414,7 @@ int pmc_agent_update(struct pmc_agent *node)
if (node->stay_subscribed) {
renew_subscription(node, 0);
}
- if (run_pmc_get_utc_offset(node, 0) > 0) {
+ if (!pmc_agent_query_utc_offset(node, 0)) {
node->pmc_last_update = ts;
}
}
diff --git a/pmc_agent.h b/pmc_agent.h
index 0ed10f8..44326d2 100644
--- a/pmc_agent.h
+++ b/pmc_agent.h
@@ -40,8 +40,6 @@ void run_pmc_events(struct pmc_agent *agent);
int run_pmc_port_properties(struct pmc_agent *agent, int timeout,
unsigned int port, int *state,
int *tstamping, char *iface);
-int run_pmc_get_utc_offset(struct pmc_agent *agent, int timeout);
-
/**
* Creates an instance of a PMC agent.
@@ -75,6 +73,20 @@ int pmc_agent_get_leap(struct pmc_agent *agent);
*/
int pmc_agent_get_sync_offset(struct pmc_agent *agent);
+/**
+ * Queries the TAI-UTC offset and the current leap adjustment from the
+ * ptp4l service.
+ *
+ * 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_utc_offset(struct pmc_agent *agent, int timeout);
+
/**
* Sets the TAI-UTC offset.
* @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
--
2.25.1
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