+
+/**
+ * Often when determining the parameter path in sysfs/procfs we
+ * are often only interest set of data. This enum gives use the
+ * ability to return data of parameters for:
+ *
+ * FILTER_BY_FS_NAME: a specific file system mount
+ * FILTER_BY_PATH: Using a Lustre file path to determine which
+ * file system is of interest
+ * FILTER_BY_EXACT: The default behavior. Search the parameter
+ * path as is.
+ */
+enum param_filter {
+ FILTER_BY_EXACT,
+ FILTER_BY_FS_NAME,
+ FILTER_BY_PATH
+};
+
+int get_lustre_param_path(const char *obd_type, const char *filter,
+ enum param_filter type, const char *param_name,
+ glob_t *param);
+int get_lustre_param_value(const char *obd_type, const char *filter,
+ enum param_filter type, const char *param_name,
+ char *value, size_t val_len);
+
+static inline int
+poolpath(glob_t *pool_path, const char *fsname, char *pathname)
+{
+ int rc;
+
+ if (fsname != NULL)
+ rc = get_lustre_param_path("lov", fsname, FILTER_BY_FS_NAME,
+ "pools", pool_path);
+ else
+ rc = get_lustre_param_path("lov", pathname, FILTER_BY_PATH,
+ "pools", pool_path);
+ return rc;
+}