1 files changed, 84 insertions, 0 deletions
diff --git a/lib/common/probes.c b/lib/common/probes.c
new file mode 100644
index 0000000..39a3905
--- /dev/null
+++ b/lib/common/probes.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2004-2024 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU Lesser General Public License
+ * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
+ */
+
+#include <crm_internal.h>           // pcmk__str_eq(), etc.
+
+#include <stdio.h>                  // NULL
+#include <stdbool.h>                // bool, true, false
+#include <glib.h>                   // guint
+#include <libxml/tree.h>            // xmlNode
+
+#include <crm/common/options.h>     // PCMK_META_INTERVAL
+#include <crm/common/xml.h>         // PCMK_XA_OPERATION
+
+/*!
+ * \brief Check whether an action name and interval represent a probe
+ *
+ * \param[in] task         Action name
+ * \param[in] interval_ms  Action interval in milliseconds
+ *
+ * \return true if \p task is \c PCMK_ACTION_MONITOR and \p interval_ms is 0,
+ *         otherwise false
+ */
+bool
+pcmk_is_probe(const char *task, guint interval_ms)
+{
+    // @COMPAT This should be made inline at an API compatibility break
+    return (interval_ms == 0)
+           && pcmk__str_eq(task, PCMK_ACTION_MONITOR, pcmk__str_none);
+}
+
+/*!
+ * \brief Check whether an action history entry represents a probe
+ *
+ * \param[in] xml  XML of action history entry
+ *
+ * \return true if \p xml is for a probe action, otherwise false
+ */
+bool
+pcmk_xe_is_probe(const xmlNode *xml)
+{
+    int interval_ms = 0;
+
+    if (xml == NULL) {
+        return false;
+    }
+
+    pcmk__scan_min_int(crm_element_value(xml, PCMK_META_INTERVAL),
+                       &interval_ms, 0);
+
+    return pcmk_is_probe(crm_element_value(xml, PCMK_XA_OPERATION),
+                         interval_ms);
+}
+
+/*!
+ * \brief Check whether an action history entry represents a maskable probe
+ *
+ * \param[in] xml  XML of action history entry
+ *
+ * \return true if \p xml is for a failed probe action that should be treated as
+ *         successful, otherwise false
+ */
+bool
+pcmk_xe_mask_probe_failure(const xmlNode *xml)
+{
+    int exec_status = PCMK_EXEC_UNKNOWN;
+    int exit_status = PCMK_OCF_OK;
+
+    if (!pcmk_xe_is_probe(xml)) {
+        return false;
+    }
+
+    crm_element_value_int(xml, PCMK__XA_OP_STATUS, &exec_status);
+    crm_element_value_int(xml, PCMK__XA_RC_CODE, &exit_status);
+
+    return (exit_status == PCMK_OCF_NOT_INSTALLED)
+           || (exit_status == PCMK_OCF_INVALID_PARAM)
+           || (exec_status == PCMK_EXEC_NOT_INSTALLED);
+}