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integ/base/linuxptp/debian/patches/0016-pmc_agent-Hide-the-imp...

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From f6d7bb0a62f15fcca0343c42891f7e056f502949 Mon Sep 17 00:00:00 2001
From: Andre Mauricio Zelak <andre.zelak@windriver.com>
Date: Mon, 12 Jun 2023 14:55:29 -0300
Subject: [PATCH 16/56] pmc_agent: Hide the implementation.
The PMC agent's implementation should not be exposed to its users. This
patch hides the details and provides a method to create an instance. In
addition, the signature of the receive callback is made generic, removing
the container_of pattern meant for sub-classing modules.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
[commit 826698791769e0ba4431fe98f02d4d09c109542e upstream]
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
---
phc2sys.c | 76 +++++++++++++++++++++++++++++------------------------
pmc_agent.c | 58 +++++++++++++++++++++++++++++++++++-----
pmc_agent.h | 62 +++++++++++++++++++++++++++++++------------
3 files changed, 138 insertions(+), 58 deletions(-)
diff --git a/phc2sys.c b/phc2sys.c
index 74ee9d1..037b1b9 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -103,7 +103,7 @@ struct phc2sys_private {
int forced_sync_offset;
int kernel_leap;
int state_changed;
- struct pmc_agent node;
+ struct pmc_agent *node;
LIST_HEAD(port_head, port) ports;
LIST_HEAD(clock_head, clock) clocks;
LIST_HEAD(dst_clock_head, clock) dst_clocks;
@@ -306,7 +306,7 @@ static void clock_reinit(struct phc2sys_private *priv, struct clock *clock,
LIST_FOREACH(p, &priv->ports, list) {
if (p->clock == clock) {
- ret = run_pmc_port_properties(&priv->node, 1000, p->number,
+ ret = run_pmc_port_properties(priv->node, 1000, p->number,
&state, &timestamping,
iface);
if (ret > 0)
@@ -641,7 +641,7 @@ static int do_pps_loop(struct phc2sys_private *priv, struct clock *clock,
if (src == CLOCK_INVALID) {
/* The sync offset can't be applied with PPS alone. */
- priv->node.sync_offset = 0;
+ pmc_agent_set_sync_offset(priv->node, 0);
} else {
enable_pps_output(priv->master->clkid);
}
@@ -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) < 0)
+ if (update_pmc_node(priv->node, 0) < 0)
continue;
update_clock(priv, clock, pps_offset, pps_ts, -1);
}
@@ -710,15 +710,15 @@ 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, subscriptions) < 0)
+ if (update_pmc_node(priv->node, subscriptions) < 0)
continue;
if (subscriptions) {
- run_pmc_events(&priv->node);
+ run_pmc_events(priv->node);
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 (run_pmc_get_utc_offset(priv->node, 1000) <= 0) {
pr_err("failed to get UTC offset");
continue;
}
@@ -810,13 +810,10 @@ static int clock_compute_state(struct phc2sys_private *priv,
return state;
}
-#define node_to_phc2sys(node) \
- container_of(node, struct phc2sys_private, node)
-
-static int phc2sys_recv_subscribed(struct pmc_agent *node,
- struct ptp_message *msg, int excluded)
+static int phc2sys_recv_subscribed(void *context, struct ptp_message *msg,
+ int excluded)
{
- struct phc2sys_private *priv = node_to_phc2sys(node);
+ struct phc2sys_private *priv = (struct phc2sys_private *) context;
int mgt_id, state;
struct portDS *pds;
struct port *port;
@@ -863,7 +860,7 @@ static int auto_init_ports(struct phc2sys_private *priv, int add_rt)
while (1) {
if (!is_running())
return -1;
- res = run_pmc_clock_identity(&priv->node, 1000);
+ res = run_pmc_clock_identity(priv->node, 1000);
if (res < 0)
return -1;
if (res > 0)
@@ -872,20 +869,20 @@ static int auto_init_ports(struct phc2sys_private *priv, int add_rt)
pr_notice("Waiting for ptp4l...");
}
- number_ports = run_pmc_get_number_ports(&priv->node, 1000);
+ number_ports = run_pmc_get_number_ports(priv->node, 1000);
if (number_ports <= 0) {
pr_err("failed to get number of ports");
return -1;
}
- res = run_pmc_subscribe(&priv->node, 1000);
+ res = run_pmc_subscribe(priv->node, 1000);
if (res <= 0) {
pr_err("failed to subscribe");
return -1;
}
for (i = 1; i <= number_ports; i++) {
- res = run_pmc_port_properties(&priv->node, 1000, i, &state,
+ res = run_pmc_port_properties(priv->node, 1000, i, &state,
&timestamping, iface);
if (res == -1) {
/* port does not exist, ignore the port */
@@ -922,7 +919,7 @@ 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 (run_pmc_get_utc_offset(priv->node, 1000) <= 0) {
pr_err("failed to get UTC offset");
return -1;
}
@@ -933,9 +930,9 @@ static int auto_init_ports(struct phc2sys_private *priv, int add_rt)
static int clock_handle_leap(struct phc2sys_private *priv, struct clock *clock,
int64_t offset, uint64_t ts)
{
- int clock_leap, node_leap = priv->node.leap;
+ int clock_leap, node_leap = pmc_agent_get_leap(priv->node);
- clock->sync_offset = priv->node.sync_offset;
+ clock->sync_offset = pmc_agent_get_sync_offset(priv->node);
if ((node_leap || clock->leap_set) &&
clock->is_utc != priv->master->is_utc) {
@@ -976,7 +973,7 @@ static int clock_handle_leap(struct phc2sys_private *priv, struct clock *clock,
}
}
- if (priv->node.utc_offset_traceable &&
+ if (pmc_agent_utc_offset_traceable(priv->node) &&
clock->utc_offset_set != clock->sync_offset) {
if (clock->clkid == CLOCK_REALTIME)
sysclk_set_tai_offset(clock->sync_offset);
@@ -1032,11 +1029,13 @@ int main(int argc, char *argv[])
{
char *config = NULL, *dst_name = NULL, *progname, *src_name = NULL;
char uds_local[MAX_IFNAME_SIZE + 1];
+ int autocfg = 0, c, domain_number = 0, index, ntpshm_segment, offset;
+ int pps_fd = -1, print_level = LOG_INFO, r = -1, rt = 0;
+ int wait_sync = 0;
struct clock *src, *dst;
struct config *cfg;
struct option *opts;
- 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;
+ int default_sync = 1;
double phc_rate, tmp;
struct phc2sys_private priv = {
.phc_readings = 5,
@@ -1049,6 +1048,10 @@ int main(int argc, char *argv[])
if (!cfg) {
return -1;
}
+ priv.node = pmc_agent_create();
+ if (!priv.node) {
+ return -1;
+ }
opts = config_long_options(cfg);
@@ -1140,9 +1143,10 @@ int main(int argc, char *argv[])
goto end;
break;
case 'O':
- if (get_arg_val_i(c, optarg, &priv.node.sync_offset,
- INT_MIN, INT_MAX))
+ if (get_arg_val_i(c, optarg, &offset, INT_MIN, INT_MAX)) {
goto end;
+ }
+ pmc_agent_set_sync_offset(priv.node, offset);
priv.forced_sync_offset = -1;
break;
case 'L':
@@ -1271,8 +1275,8 @@ int main(int argc, char *argv[])
getpid());
if (autocfg) {
- if (init_pmc_node(cfg, &priv.node, uds_local,
- phc2sys_recv_subscribed))
+ if (init_pmc_node(cfg, priv.node, uds_local,
+ phc2sys_recv_subscribed, &priv))
goto end;
if (auto_init_ports(&priv, rt) < 0)
goto end;
@@ -1309,12 +1313,12 @@ int main(int argc, char *argv[])
r = -1;
if (wait_sync) {
- if (init_pmc_node(cfg, &priv.node, uds_local,
- phc2sys_recv_subscribed))
+ if (init_pmc_node(cfg, priv.node, uds_local,
+ phc2sys_recv_subscribed, &priv))
goto end;
while (is_running()) {
- r = run_pmc_wait_sync(&priv.node, 1000);
+ r = run_pmc_wait_sync(priv.node, 1000);
if (r < 0)
goto end;
if (r > 0)
@@ -1324,7 +1328,7 @@ int main(int argc, char *argv[])
}
if (!priv.forced_sync_offset) {
- r = run_pmc_get_utc_offset(&priv.node, 1000);
+ r = run_pmc_get_utc_offset(priv.node, 1000);
if (r <= 0) {
pr_err("failed to get UTC offset");
goto end;
@@ -1333,8 +1337,10 @@ int main(int argc, char *argv[])
if (priv.forced_sync_offset ||
(src->clkid != CLOCK_REALTIME && dst->clkid != CLOCK_REALTIME) ||
- src->clkid == CLOCK_INVALID)
- close_pmc_node(&priv.node);
+ src->clkid == CLOCK_INVALID) {
+ pmc_agent_destroy(priv.node);
+ priv.node = NULL;
+ }
}
if (pps_fd >= 0) {
@@ -1347,7 +1353,9 @@ int main(int argc, char *argv[])
}
end:
- close_pmc_node(&priv.node);
+ if (priv.node) {
+ pmc_agent_destroy(priv.node);
+ }
clock_cleanup(&priv);
port_cleanup(&priv);
config_destroy(cfg);
diff --git a/pmc_agent.c b/pmc_agent.c
index e83895c..8ccafe2 100644
--- a/pmc_agent.c
+++ b/pmc_agent.c
@@ -19,6 +19,7 @@
*/
#include <net/if.h>
#include <poll.h>
+#include <stdlib.h>
#include "notification.h"
#include "pmc_agent.h"
@@ -32,6 +33,22 @@
* renewed.
*/
+struct pmc_agent {
+ struct pmc *pmc;
+ uint64_t pmc_last_update;
+
+ struct ClockIdentity clock_identity;
+ int clock_identity_set;
+ int leap;
+ int pmc_ds_requested;
+ int sync_offset;
+ int utc_offset_traceable;
+
+ /* Callback on message reception */
+ pmc_node_recv_subscribed_t *recv_subscribed;
+ void *recv_context;
+};
+
static void send_subscription(struct pmc_agent *node)
{
struct subscribe_events_np sen;
@@ -155,7 +172,8 @@ static int run_pmc(struct pmc_agent *node, int timeout, int ds_id,
node->pmc_ds_requested = 0;
return -1;
}
- if (res <= 0 || node->recv_subscribed(node, *msg, ds_id) ||
+ if (res <= 0 ||
+ node->recv_subscribed(node->recv_context, *msg, ds_id) ||
get_mgt_id(*msg) != ds_id) {
msg_put(*msg);
*msg = NULL;
@@ -337,7 +355,7 @@ int update_pmc_node(struct pmc_agent *node, int subscribe)
}
int init_pmc_node(struct config *cfg, struct pmc_agent *node, const char *uds,
- pmc_node_recv_subscribed_t *recv_subscribed)
+ pmc_node_recv_subscribed_t *recv_subscribed, void *context)
{
node->pmc = pmc_create(cfg, TRANS_UDS, uds, 0,
config_get_int(cfg, NULL, "domainNumber"),
@@ -347,15 +365,41 @@ int init_pmc_node(struct config *cfg, struct pmc_agent *node, const char *uds,
return -1;
}
node->recv_subscribed = recv_subscribed;
+ node->recv_context = context;
return 0;
}
-void close_pmc_node(struct pmc_agent *node)
+struct pmc_agent *pmc_agent_create(void)
+{
+ struct pmc_agent *agent = calloc(1, sizeof(*agent));
+ return agent;
+}
+
+void pmc_agent_destroy(struct pmc_agent *agent)
+{
+ if (agent->pmc) {
+ pmc_destroy(agent->pmc);
+ }
+ free(agent);
+}
+
+int pmc_agent_get_leap(struct pmc_agent *agent)
{
- if (!node->pmc)
- return;
+ return agent->leap;
+}
+
+int pmc_agent_get_sync_offset(struct pmc_agent *agent)
+{
+ return agent->sync_offset;
+}
- pmc_destroy(node->pmc);
- node->pmc = NULL;
+void pmc_agent_set_sync_offset(struct pmc_agent *agent, int offset)
+{
+ agent->sync_offset = offset;
+}
+
+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 10ef4b5..c0b4525 100644
--- a/pmc_agent.h
+++ b/pmc_agent.h
@@ -22,29 +22,17 @@
#ifndef HAVE_PMC_AGENT_H
#define HAVE_PMC_AGENT_H
+#include <stdbool.h>
+
#include "pmc_common.h"
struct pmc_agent;
-typedef int pmc_node_recv_subscribed_t(struct pmc_agent *agent,
- struct ptp_message *msg,
+typedef int pmc_node_recv_subscribed_t(void *context, struct ptp_message *msg,
int excluded);
-struct pmc_agent {
- struct pmc *pmc;
- int pmc_ds_requested;
- uint64_t pmc_last_update;
- int sync_offset;
- int leap;
- int utc_offset_traceable;
- int clock_identity_set;
- struct ClockIdentity clock_identity;
- pmc_node_recv_subscribed_t *recv_subscribed;
-};
-
int init_pmc_node(struct config *cfg, struct pmc_agent *agent, const char *uds,
- pmc_node_recv_subscribed_t *recv_subscribed);
-void close_pmc_node(struct pmc_agent *agent);
+ pmc_node_recv_subscribed_t *recv_subscribed, void *context);
int update_pmc_node(struct pmc_agent *agent, int subscribe);
int run_pmc_subscribe(struct pmc_agent *agent, int timeout);
int run_pmc_clock_identity(struct pmc_agent *agent, int timeout);
@@ -58,5 +46,45 @@ int run_pmc_get_utc_offset(struct pmc_agent *agent, int timeout);
int get_mgt_id(struct ptp_message *msg);
void *get_mgt_data(struct ptp_message *msg);
-#endif
+/**
+ * Creates an instance of a PMC agent.
+ * @return Pointer to a PMC instance on success, NULL otherwise.
+ */
+struct pmc_agent *pmc_agent_create(void);
+
+/**
+ * Destroys an instance of a PMC agent.
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ */
+void pmc_agent_destroy(struct pmc_agent *agent);
+
+/**
+ * Gets the current leap adjustment.
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @return The leap adjustment in seconds, either 1, 0, or -1.
+ */
+int pmc_agent_get_leap(struct pmc_agent *agent);
+
+/**
+ * Gets the TAI-UTC offset.
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @return Current offset in seconds.
+ */
+int pmc_agent_get_sync_offset(struct pmc_agent *agent);
+
+/**
+ * Sets the TAI-UTC offset.
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @param offset Desired offset in seconds.
+ */
+void pmc_agent_set_sync_offset(struct pmc_agent *agent, int offset);
+
+/**
+ * Tests whether the current UTC offset is traceable.
+ * @param agent Pointer to a PMC instance obtained via @ref pmc_agent_create().
+ * @return True is the offset is traceable, false otherwise.
+ */
+bool pmc_agent_utc_offset_traceable(struct pmc_agent *agent);
+
+#endif
--
2.25.1
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