From 6263c81dfe8bf78c1f47ab8a1e33aa896202dba0 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Thu, 3 Dec 2015 11:07:39 +0100
Subject: [PATCH] allow to configure watchdog module in
 /etc/default/pve-ha-manager

All watchdog modules are blacklisted, so we cannot load them via /etc/modules.
Instead, watchdog-mux loads it at startup.
---
 debian/pve-ha-manager.default |  2 ++
 debian/watchdog-mux.service   |  1 +
 src/watchdog-mux.c            | 13 ++++++++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 debian/pve-ha-manager.default

diff --git a/debian/pve-ha-manager.default b/debian/pve-ha-manager.default
new file mode 100644
index 0000000..3f33ff0
--- /dev/null
+++ b/debian/pve-ha-manager.default
@@ -0,0 +1,2 @@
+# select watchdog module (default is softdog)
+#WATCHDOG_MODULE=ipmi_watchdog
\ No newline at end of file
diff --git a/debian/watchdog-mux.service b/debian/watchdog-mux.service
index c701b3a..cd28df8 100644
--- a/debian/watchdog-mux.service
+++ b/debian/watchdog-mux.service
@@ -2,6 +2,7 @@
 Description=Proxmox VE watchdog multiplexer
 
 [Service]
+EnvironmentFile=-/etc/default/pve-ha-manager
 ExecStart=/usr/sbin/watchdog-mux
 OOMScoreAdjust=-1000
 Restart=no
diff --git a/src/watchdog-mux.c b/src/watchdog-mux.c
index de43aa3..2b44013 100644
--- a/src/watchdog-mux.c
+++ b/src/watchdog-mux.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -120,7 +121,17 @@ main(void)
      * options softdog soft_noboot=1
      */
     if (stat(WATCHDOG_DEV, &fs) == -1) {
-        system("modprobe -q softdog"); // load softdog by default
+        char *wd_module = getenv("WATCHDOG_MODULE");
+        if (wd_module) {
+            char *cmd = NULL;
+            if ((asprintf(&cmd, "modprobe -q %s", wd_module) == -1)) {
+                perror("assemble modprobe command failed");
+                exit(EXIT_FAILURE);
+            }
+            system(cmd);
+        } else {
+            system("modprobe -q softdog"); // load softdog by default
+        }
     }
 
     if ((watchdog_fd = open(WATCHDOG_DEV, O_WRONLY)) == -1) {