Address Github issue #11532 by translating legacy parameters for direct launches

Borrow code from the OMPI schizo module in PRRTE that translates legacy
MCA parameters when an application is direct launched (PRRTE will translate
legacy parameters when natively launched).

Signed-off-by: Quincey Koziol <qkoziol@amazon.com>

Author: qkoziol

opal/mca/pmix/base/pmix_base_fns.c

@@ -30,12 +30,18 @@
 
 #include "opal/class/opal_pointer_array.h"
 #include "opal/util/argv.h"
+#include "opal/util/opal_environ.h"
+#include "opal/util/os_path.h"
 #include "opal/util/output.h"
+#include "opal/util/printf.h"
 #include "opal/util/proc.h"
 #include "opal_stdint.h"
 
+#include "opal/mca/base/mca_base_vari.h"
 #include "opal/mca/pmix/base/base.h"
 
+#include "src/include/pmix_frameworks.h"
+
 int opal_pmix_base_exchange(pmix_info_t *indat, pmix_pdata_t *outdat, int timeout)
 {
     pmix_status_t rc;
@@ -73,6 +79,150 @@ int opal_pmix_base_exchange(pmix_info_t *indat, pmix_pdata_t *outdat, int timeou
     return opal_pmix_convert_status(rc);
 }
 
+static bool check_pmix_param(char *param)
+{
+    char *p;
+    size_t n;
+    int len;
+
+    p = strchr(param, '_');
+    len = (int)(p - param);
+
+    if (0 == strncmp(param, "pmix", len)) {
+        return true;
+    }
+    for (n=0; NULL != pmix_framework_names[n]; n++) {
+        if (0 == strncmp(param, pmix_framework_names[n], len)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+static bool check_pmix_overlap(char *var, char *value)
+{
+    char *tmp;
+
+    if (0 == strncmp(var, "dl_", 3)) {
+        opal_asprintf(&tmp, "PMIX_MCA_pdl_%s", &var[3]);
+        // set it, but don't overwrite if they already
+        // have a value in our environment
+        setenv(tmp, value, false);
+        free(tmp);
+        return true;
+    } else if (0 == strncmp(var, "oob_", 4)) {
+        opal_asprintf(&tmp, "PMIX_MCA_ptl_%s", &var[4]);
+        // set it, but don't overwrite if they already
+        // have a value in our environment
+        setenv(tmp, value, false);
+        free(tmp);
+        return true;
+    } else if (0 == strncmp(var, "hwloc_", 6)) {
+        opal_asprintf(&tmp, "PMIX_MCA_%s", var);
+        // set it, but don't overwrite if they already
+        // have a value in our environment
+        setenv(tmp, value, false);
+        free(tmp);
+        return true;
+    } else if (0 == strncmp(var, "if_", 3)) {
+        // need to convert if to pif
+        opal_asprintf(&tmp, "PMIX_MCA_pif_%s", &var[3]);
+        // set it, but don't overwrite if they already
+        // have a value in our environment
+        setenv(tmp, value, false);
+        free(tmp);
+        return true;
+    }
+    return false;
+}
+
+// NOTE: This code is fundamentally the same (module PMIX <-> OPAL)
+//      as the translate_params() routine in the PRRTE repo's
+//      src/mca/schizo/ompi/schizo_ompi.c file.  If there are
+//      changes here, there are likely to be changes there.
+static void translate_params(void)
+{
+    char *evar, *tmp, *e2;
+    char *file;
+    const char *home;
+    opal_list_t params;
+    mca_base_var_file_value_t *fv;
+    bool pmix_overlap;
+    int n, len;
+
+    /* Since we are direct launched, we need to check the OMPI default
+     * MCA params to see if there is something relating to PRRTE
+     * in them - this would be "old" references to things from
+     * ORTE, as well as a few OPAL references that also impact us
+     *
+     * NOTE: we do this in the following precedence order. Note
+     * that we do not overwrite at any step - this is so that we
+     * don't overwrite something previously set by the user. So
+     * the order to execution is the opposite of the intended
+     * precedence order.
+     *
+     * 1. check the environmental paramaters for OMPI_MCA values
+     *    that need to be translated
+     *
+     * 2. the user's home directory file as it should
+     *    overwrite the system default file, but not the
+     *    envars
+     *
+     * 3. the system default parameter file
+     */
+    len = strlen("OMPI_MCA_");
+    for (n=0; NULL != environ[n]; n++) {
+        if (0 == strncmp(environ[n], "OMPI_MCA_", len)) {
+            e2 = strdup(environ[n]);
+            evar = strrchr(e2, '=');
+            *evar = '\0';
+            ++evar;
+            pmix_overlap = check_pmix_overlap(&e2[len], evar);
+            if (!pmix_overlap && check_pmix_param(&e2[len])) {
+                opal_asprintf(&tmp, "PMIX_MCA_%s", &e2[len]);
+                // set it, but don't overwrite if they already
+                // have a value in our environment
+                setenv(tmp, evar, false);
+                free(tmp);
+            }
+            free(e2);
+        }
+    }
+
+    /* try to get user's home directory */
+    home = opal_home_directory();
+    if (NULL != home) {
+        file = opal_os_path(false, home, ".openmpi", "mca-params.conf", NULL);
+        OBJ_CONSTRUCT(&params, opal_list_t);
+        mca_base_parse_paramfile(file, &params);
+        free(file);
+        OPAL_LIST_FOREACH (fv, &params, mca_base_var_file_value_t) {
+            pmix_overlap = check_pmix_overlap(&e2[len], evar);
+            if (!pmix_overlap && check_pmix_param(fv->mbvfv_var)) {
+                opal_asprintf(&tmp, "PMIX_MCA_%s", fv->mbvfv_var);
+                // set it, but don't overwrite if they already
+                // have a value in our environment
+                setenv(tmp, fv->mbvfv_value, false);
+                free(tmp);
+            }
+        }
+        OPAL_LIST_DESTRUCT(&params);
+    }
+
+    /* check if the user has set OMPIHOME in their environment */
+    if (NULL != (evar = getenv("OMPIHOME"))) {
+        /* look for the default MCA param file */
+        file = opal_os_path(false, evar, "etc", "openmpi-mca-params.conf", NULL);
+        OBJ_CONSTRUCT(&params, opal_list_t);
+        mca_base_parse_paramfile(file, &params);
+        free(file);
+        OPAL_LIST_FOREACH (fv, &params, mca_base_var_file_value_t) {
+            check_pmix_overlap(fv->mbvfv_var, fv->mbvfv_value);
+        }
+        OPAL_LIST_DESTRUCT(&params);
+    }
+}
+
 typedef struct {
     opal_list_item_t super;
     pmix_nspace_t nspace;
@@ -85,8 +235,13 @@ static opal_list_t localnspaces;
 void opal_pmix_setup_nspace_tracker(void)
 {
     /* check if we were launched by PRRTE */
-    if (NULL != getenv("PRRTE_LAUNCHED")) {
+    if (NULL != getenv("PRTE_LAUNCHED")) {
         opal_process_info.nativelaunch = true;
+    } else {
+        // When direct launched, translate MCA parameters from older releases
+        // into newer versions here, since PRRTE isn't involved.  (When
+        // natively launched, PRRTE will already have translated the params)
+        translate_params();
     }
 
     OBJ_CONSTRUCT(&localnspaces, opal_list_t);