[configure.ac] implement SAI API version check (sonic-net#1000)

Signed-off-by: Stepan Blyschak stepanb@nvidia.com

The motivation for this change is described in the proposal sonic-net/SONiC#935 and proposal in SAI opencomputeproject/SAI#1404
NOTE: Requires to update SAI once opencomputeproject/SAI#1404 is in.

configure.ac

@@ -182,6 +182,29 @@ AC_SUBST(CXXFLAGS_COMMON)
 
 AC_SUBST(SAIINC, "-I\$(top_srcdir)/SAI/inc -I\$(top_srcdir)/SAI/experimental -I\$(top_srcdir)/SAI/meta")
 
+AM_COND_IF([SYNCD], [
+AM_COND_IF([SAIVS], [], [
+SAVED_FLAGS="$CXXFLAGS"
+CXXFLAGS="-lsai -I$srcdir/SAI/inc -I$srcdir/SAI/experimental -I$srcdir/SAI/meta"
+AC_MSG_CHECKING([SAI headers API version and library version check])
+AC_TRY_RUN([
+extern "C" {
+#include <sai.h>
+}
+int main() {
+    sai_api_version_t version;
+    if (SAI_STATUS_SUCCESS != sai_query_api_version(&version))
+    {
+        return 1;
+    }
+    return (version != SAI_API_VERSION);
+}],
+[AC_MSG_RESULT(ok)],
+[AC_MSG_RESULT(failed)
+AC_MSG_ERROR("SAI headers API version and library version mismatch")])
+CXXFLAGS="$SAVED_FLAGS"
+])])
+
 AC_OUTPUT(Makefile
           meta/Makefile
           lib/Makefile

lib/sai_redis_interfacequery.cpp

@@ -240,3 +240,11 @@ sai_status_t sai_query_stats_capability(
 
     return SAI_STATUS_NOT_IMPLEMENTED;
 }
+
+sai_status_t sai_query_api_version(
+        _Out_ sai_api_version_t *version)
+{
+    SWSS_LOG_ENTER();
+
+    return SAI_STATUS_NOT_IMPLEMENTED;
+}

syncd/VendorSai.cpp

@@ -4,6 +4,7 @@
 
 #include "swss/logger.h"
 
+#include <cinttypes>
 #include <cstring>
 
 using namespace syncd;
@@ -57,9 +58,28 @@ sai_status_t VendorSai::initialize(
         return SAI_STATUS_INVALID_PARAMETER;
     }
 
+    sai_api_version_t version{};
+    auto status = sai_query_api_version(&version);
+    if (status != SAI_STATUS_SUCCESS)
+    {
+        SWSS_LOG_ERROR("failed to query SAI API version");
+
+        return status;
+    }
+
+    SWSS_LOG_NOTICE("SAI API version: %" PRId64, version);
+
+    if (version != SAI_API_VERSION)
+    {
+        SWSS_LOG_ERROR("SAI implementation API version %" PRId64 " does not match SAI headers API version %" PRId64,
+                       version, SAI_API_VERSION);
+
+        return SAI_STATUS_FAILURE;
+    }
+
     memcpy(&m_service_method_table, service_method_table, sizeof(m_service_method_table));
 
-    auto status = sai_api_initialize(flags, service_method_table);
+    status = sai_api_initialize(flags, service_method_table);
 
     if (status == SAI_STATUS_SUCCESS)
     {

vslib/sai_vs_interfacequery.cpp

@@ -192,3 +192,12 @@ sai_status_t sai_query_stats_capability(
 
     return vs_sai->queryStatsCapability(switch_id, object_type, stats_capability);
 }
+
+sai_status_t sai_query_api_version(
+        _Out_ sai_api_version_t *version)
+{
+    SWSS_LOG_ENTER();
+
+    *version = SAI_API_VERSION;
+    return SAI_STATUS_SUCCESS;
+}