LU-12410 lnet: Implement DLC wrapper for cfs_parse_nidlist

[fs/lustre-release.git] / lnet / utils / lnetconfig / liblnetconfig.c

diff --git a/lnet/utils/lnetconfig/liblnetconfig.c b/lnet/utils/lnetconfig/liblnetconfig.c
index 5a50b21..2004833 100644 (file)
--- a/lnet/utils/lnetconfig/liblnetconfig.c
+++ b/lnet/utils/lnetconfig/liblnetconfig.c
@@ -262,6 +262,61 @@ static char *get_next_delimiter_in_nid(char *str, char sep)
        return comma;
 }
 
+int lustre_lnet_parse_nidstr(char *nidstr, lnet_nid_t *lnet_nidlist,
+                            int max_nids, char *err_str)
+{
+       int rc, num_nids = 0;
+       struct list_head nidlist;
+
+       if (!nidstr) {
+               snprintf(err_str, LNET_MAX_STR_LEN, "supplied nidstr is NULL");
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       if (strchr(nidstr, '*')) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "asterisk not allowed in nidstring \"%s\"", nidstr);
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       INIT_LIST_HEAD(&nidlist);
+       rc = cfs_parse_nidlist(nidstr, strlen(nidstr), &nidlist);
+       if (rc == 0) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "Unable to parse nidlist from: %s\n", nidstr);
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       if (list_empty(&nidlist)) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "\"%s\" does not specify any valid nid lists", nidstr);
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       num_nids = cfs_expand_nidlist(&nidlist, lnet_nidlist, max_nids);
+
+       if (num_nids == -1) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "\"%s\" specifies more than the %d NIDs allowed by this operation.",
+                        nidstr, max_nids);
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       if (num_nids < 0) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "Failed to expand nidstr: %s", strerror(num_nids));
+               return LUSTRE_CFG_RC_OUT_OF_MEM;
+       }
+
+       if (num_nids == 0) {
+               snprintf(err_str, LNET_MAX_STR_LEN,
+                        "\"%s\" did not expand to any nids", nidstr);
+               return LUSTRE_CFG_RC_BAD_PARAM;
+       }
+
+       return num_nids;
+}
+
 int lustre_lnet_parse_nids(char *nids, char **array, int size,
                           char ***out_array)
 {