starlingx/integ
Code Issues Proposed changes
f1a536ad8f
integ/base/linuxptp/debian/patches/0006-Add-option-to-disable-default-port-selection-in-phc2.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A series of changes were patched back from a newer version of the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

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From 3a6de7b6208ccc64a20474db15abaac08e99d10b Mon Sep 17 00:00:00 2001
Message-Id: <3a6de7b6208ccc64a20474db15abaac08e99d10b.1630418391.git.Jim.Somerville@windriver.com>
In-Reply-To: <0389752e3aecf8d2b2743f16ce1408a58088bea9.1630418391.git.Jim.Somerville@windriver.com>
References: <0389752e3aecf8d2b2743f16ce1408a58088bea9.1630418391.git.Jim.Somerville@windriver.com>
From: Cole Walker <cole.walker@windriver.com>
Date: Wed, 23 Jun 2021 11:14:41 -0400
Subject: [PATCH 6/47] Add option to disable default port selection in phc2sys
This change serves to address an issue in phc2sys
where the local ptp clocks are not synced together properly if the local
time is far behind the reference time. This issue occurs when phc2sys
starts and there is no client port currently synced to a grandmaster. In
the original behaviour, phc2sys selects the first configured port and
proceeds to sync all of the other clocks to it by performing the
first_step operation.
Then ptp4l will evenually lock to the Grandmaster clock, and that
single port will have its time updated to the correct value, but
phc2sys has already performed the first_step operation and will not
step the other clocks again.
This solution provides an option to disable the selection of a
default port by phc2sys. When no default port is selected, phc2sys waits
for ptp4l to sync to the Grandmaster before bringing the other clocks
into sync with the first_step operation.
This option is configured via the default_sync
parameter or the -D flag. The default_sync parameter is set to on by
default in order to keep the behaviour the same as upstream linuxptp
but can be configured by users via
system service-parameter-add ptp global default_sync=0
Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
---
config.c | 1 +
phc2sys.c | 15 ++++++++++++---
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/config.c b/config.c
index ef5e833..cab7e4f 100644
--- a/config.c
+++ b/config.c
@@ -333,6 +333,7 @@ struct config_item config_tab[] = {
GLOB_ITEM_INT("utc_offset", CURRENT_UTC_OFFSET, 0, INT_MAX),
GLOB_ITEM_INT("verbose", 0, 0, 1),
GLOB_ITEM_INT("write_phase_mode", 0, 0, 1),
+ GLOB_ITEM_INT("default_sync", 1, 0, 1),
};
static struct unicast_master_table *current_uc_mtab;
diff --git a/phc2sys.c b/phc2sys.c
index a36cbe0..44d6872 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -120,6 +120,7 @@ struct phc2sys_private {
LIST_HEAD(clock_head, clock) clocks;
LIST_HEAD(dst_clock_head, clock) dst_clocks;
struct clock *master;
+ int default_sync;
};
static struct config *phc2sys_config;
@@ -437,7 +438,7 @@ static void reconfigure(struct phc2sys_private *priv)
}
last = c;
}
- if (dst_cnt > 1 && !src) {
+ if (dst_cnt > 1 && !src && priv->default_sync) {
if (!rt || rt->dest_only) {
priv->master = last;
/* Reset to original state in next reconfiguration. */
@@ -1344,6 +1345,7 @@ static void usage(char *progname)
" -N [num] number of master clock readings per update (5)\n"
" -L [limit] sanity frequency limit in ppb (200000000)\n"
" -M [num] NTP SHM segment number (0)\n"
+ " -D [num] fall back to default clock in automatic mode (1)\n"
" -u [num] number of clock updates in summary stats (0)\n"
" -n [num] domain number (0)\n"
" -x apply leap seconds by servo instead of kernel\n"
@@ -1364,7 +1366,7 @@ int main(int argc, char *argv[])
struct clock *src, *dst;
struct config *cfg;
struct option *opts;
- int autocfg = 0, c, domain_number = 0, index, ntpshm_segment;
+ int autocfg = 0, c, domain_number = 0, default_sync = 1, index, ntpshm_segment;
int pps_fd = -1, print_level = LOG_INFO, r = -1, rt = 0, wait_sync = 0;
double phc_rate, tmp;
struct phc2sys_private priv = {
@@ -1388,7 +1390,7 @@ int main(int argc, char *argv[])
progname = strrchr(argv[0], '/');
progname = progname ? 1+progname : argv[0];
while (EOF != (c = getopt_long(argc, argv,
- "arc:d:f:s:E:P:I:S:F:R:N:O:L:M:i:u:wn:xz:l:t:mqvh",
+ "arc:d:f:s:E:P:I:S:F:R:N:O:L:M:D:i:u:wn:xz:l:t:mqvh",
opts, &index))) {
switch (c) {
case 0:
@@ -1540,6 +1542,12 @@ int main(int argc, char *argv[])
version_show(stdout);
config_destroy(cfg);
return 0;
+ case 'D':
+ if (get_arg_val_i(c, optarg, &default_sync, 0, 1) ||
+ config_set_int(cfg, "default_sync", default_sync)) {
+ goto end;
+ }
+ break;
case 'h':
usage(progname);
config_destroy(cfg);
@@ -1588,6 +1596,7 @@ int main(int argc, char *argv[])
}
priv.kernel_leap = config_get_int(cfg, NULL, "kernel_leap");
priv.sanity_freq_limit = config_get_int(cfg, NULL, "sanity_freq_limit");
+ priv.default_sync = config_get_int(cfg, NULL, "default_sync");
if (autocfg) {
if (init_pmc(cfg, &priv))
--
2.29.2
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