rasdaemon: Fix for vendor errors are not recorded in the SQLite datab…

…ase if some cpus are offline

Fix for vendor errors are not recorded in the SQLite database if some cpus
are offline at the system start.

Issue:

This issue is reproducible by offline some cpus, run
./rasdaemon -f --record & and
inject vendor specific error supported in the rasdaemon.

Reason:

When the system starts with some of the cpus offline and then run
the rasdaemon, read_ras_event_all_cpus() exit with error and switch to
the multi thread way. However read() in read_ras_event() return error in
threads for each of the offline CPUs and does clean up including calling
ras_ns_finalize_vendor_tables(), which invokes sqlite3_finalize() on vendor
tables created. Thus the vendor error data does not stored in the SQLite
database when such error is reported next time.

Solution:

In ras_ns_add_vendor_tables() and ras_ns_finalize_vendor_tables() use
reference count and close vendor tables which created in ras_ns_add_vendor_tables()
based on the reference count.

Reported-by: Junhao He <[email protected]>
Signed-off-by: Shiju Jose <[email protected]>

ras-non-standard-handler.c

@@ -66,6 +66,7 @@ int register_ns_ev_decoder(struct ras_ns_ev_decoder *ns_ev_decoder)
 #endif
 	if (!ras_ns_ev_dec_list) {
 		ras_ns_ev_dec_list = ns_ev_decoder;
+		ras_ns_ev_dec_list->ref_count = 0;
 	} else {
 		list = ras_ns_ev_dec_list;
 		while (list->next)
@@ -86,6 +87,8 @@ int ras_ns_add_vendor_tables(struct ras_events *ras)
 		return -1;
 
 	ns_ev_decoder = ras_ns_ev_dec_list;
+	if (ras_ns_ev_dec_list)
+		ras_ns_ev_dec_list->ref_count++;
 	while (ns_ev_decoder) {
 		if (ns_ev_decoder->add_table && !ns_ev_decoder->stmt_dec_record) {
 			error = ns_ev_decoder->add_table(ras, ns_ev_decoder);
@@ -128,6 +131,16 @@ void ras_ns_finalize_vendor_tables(void)
 #ifdef HAVE_SQLITE3
 	struct ras_ns_ev_decoder *ns_ev_decoder = ras_ns_ev_dec_list;
 
+	if (!ras_ns_ev_dec_list)
+		return;
+
+	if (ras_ns_ev_dec_list->ref_count > 0)
+		ras_ns_ev_dec_list->ref_count--;
+	else
+		return;
+	if (ras_ns_ev_dec_list->ref_count > 0)
+		return;
+
 	while (ns_ev_decoder) {
 		if (ns_ev_decoder->stmt_dec_record) {
 			ras_mc_finalize_vendor_table(ns_ev_decoder->stmt_dec_record);
@@ -141,6 +154,9 @@ void ras_ns_finalize_vendor_tables(void)
 static void unregister_ns_ev_decoder(void)
 {
 #ifdef HAVE_SQLITE3
+	if (!ras_ns_ev_dec_list)
+		return;
+	ras_ns_ev_dec_list->ref_count = 1;
 	ras_ns_finalize_vendor_tables();
 #endif
 	ras_ns_ev_dec_list = NULL;

ras-non-standard-handler.h

@@ -19,6 +19,7 @@
 
 struct ras_ns_ev_decoder {
 	struct ras_ns_ev_decoder *next;
+	uint16_t ref_count;
 	const char *sec_type;
 	int (*add_table)(struct ras_events *ras, struct ras_ns_ev_decoder *ev_decoder);
 	int (*decode)(struct ras_events *ras, struct ras_ns_ev_decoder *ev_decoder,