This patch adds templates caching to cgrulesengd
* they are initialized
* reloaded in case of signal SIGUSR1
Signed-off-by: Ivana Hutarova Varekova <varek...@redhat.com>
---
src/daemon/cgrulesengd.c | 41 +++++++++++++++++++++++++++++++++++++++++
src/daemon/cgrulesengd.h | 7 +++++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/src/daemon/cgrulesengd.c b/src/daemon/cgrulesengd.c
index ff72965..f12db45 100644
--- a/src/daemon/cgrulesengd.c
+++ b/src/daemon/cgrulesengd.c
@@ -884,6 +884,26 @@ void cgre_flash_rules(int signum)
cgroup_print_rules_config(logfile);
fprintf(logfile, "\n");
}
+
+ /* Ask libcgroup to reload the template rules table. */
+ cgroup_reload_cached_templates(CGCONFIG_CONF_FILE);
+}
+
+/**
+ * Catch the SIGUSR1 signal and reload the rules configuration. This function
+ * makes use of the logfile and flog() to print the new rules.
+ * @param signum The signal that we caught (always SIGUSR1)
+ */
+void cgre_flash_templates(int signum)
+{
+ /* Current time */
+ time_t tm = time(0);
+
+ flog(LOG_NOTICE, "Reloading templates configuration.");
+ flog(LOG_DEBUG, "Current time: %s", ctime(&tm));
+
+ /* Ask libcgroup to reload the templates table. */
+ cgroup_reload_cached_templates(CGCONFIG_CONF_FILE);
}
/**
@@ -1092,6 +1112,15 @@ int main(int argc, char *argv[])
goto finished;
}
+ /* ask libcgroup to load template rules as well */
+ ret = cgroup_init_templates_cache(CGCONFIG_CONF_FILE);
+ if (ret != 0) {
+ fprintf(stderr, "Error: libcgroup failed to initialize teplate"\
+ "rules from %s. %s\n", CGCONFIG_CONF_FILE,
+ cgroup_strerror(ret));
+ goto finished;
+ }
+
/* Now, start the daemon. */
ret = cgre_start_daemon(logp, facility, daemon, verbosity);
if (ret < 0) {
@@ -1114,6 +1143,18 @@ int main(int argc, char *argv[])
}
/*
+ * Set up the signal handler to reload templates cache upon
+ * reception of a SIGUSR1 signal.
+ */
+ sa.sa_handler = &cgre_flash_templates;
+ ret = sigaction(SIGUSR1, &sa, NULL);
+ if (ret) {
+ flog(LOG_ERR, "Failed to set up signal handler for SIGUSR1."\
+ " Error: %s", strerror(errno));
+ goto finished;
+ }
+
+ /*
* Set up the signal handler to catch SIGINT and SIGTERM so that we
* can exit gracefully.
*/
diff --git a/src/daemon/cgrulesengd.h b/src/daemon/cgrulesengd.h
index 97c62f1..e273b4b 100644
--- a/src/daemon/cgrulesengd.h
+++ b/src/daemon/cgrulesengd.h
@@ -106,6 +106,13 @@ int cgre_start_daemon(const char *logp, const int logf,
void cgre_flash_rules(int signum);
/**
+ * Catch the SIGUSR1 signal and reload the rules configuration. This function
+ * makes use of the logfile and flog() to print the new rules.
+ * @param signum The signal that we caught (always SIGUSR1)
+ */
+void cgre_flash_templates(int signum);
+
+/**
* Catch the SIGTERM and SIGINT signal so that we can exit gracefully. Before
* exiting, this function makes use of the logfile and flog().
* @param signum The signal that we caught (SIGTERM, SIGINT)
------------------------------------------------------------------------------
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