plugin virt, collectd.conf.in, collectd.conf.pod eddited to be according to comments...

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 821d0ff..bbe7b18 100644 (file)
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -1412,7 +1412,7 @@
 #      RefreshInterval 60
 #      Domain "name"
 #      BlockDevice "name:device"
-#      BlockDeviceFormat dev
+#      BlockDeviceFormat target
 #      BlockDeviceFormatBasename false
 #      InterfaceDevice "name:device"
 #      IgnoreSelected false

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index 69e716b..64be99e 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -7773,9 +7773,7 @@ option is set to 0, refreshing is disabled completely.
 
 =item B<BlockDevice> I<name:dev>
 
-=item B<BlockDeviceFormat> B<source>|B<dev>
-
-=item B<BlockDeviceFormatBasename> B<false>|B<true>
+=item B<BlockDeviceFormat> B<source>|B<target>
 
 =item B<InterfaceDevice> I<name:dev>
 
@@ -7802,9 +7800,9 @@ Example:
 Ignore all I<hdb> devices on any domain, but other block devices (eg. I<hda>)
 will be collected.
 
-If I<BlockDeviceFormat> is set to B<dev>, then the device names will be the ones
+If I<BlockDeviceFormat> is set to B<target>, then the device names will be the ones
 in the I<target> node for the device in the XML definition of the domain. The
-default is B<dev>. This is the behavior before adding the option.
+default is B<target>. This is the behavior before adding the option.
 
 If I<BlockDeviceFormat> is set to B<source>, then the device names will be the ones
 in the I<source> node for the device in the XML definition of the domain.
@@ -7823,18 +7821,20 @@ If the domain XML have the following device defined:
 
 setting 
 
-        BlockDeviceFormat dev
+        BlockDeviceFormat target
 
-will name the device in the graph as sda 
+will name the device in the graph as C<sda> 
 
 setting
  
        BlockDeviceFormat source
 
-will name the device in the graph as var_lib_libvirt_images_image1.qcow2
+will name the device in the graph as C<var_lib_libvirt_images_image1.qcow2>
 
 These names will also be part of the RRD filename.
 
+=item B<BlockDeviceFormatBasename> B<false>|B<true>
+
 I<BlockDeviceFormatBasename> - this option is honored if and only if 
 option I<BlockDeviceFormat> is set to B<source>. If set to B<true> then 
 only the last part of the path will be used for device name and naming the
@@ -7842,12 +7842,12 @@ RRD file.
 
 Example: 
 
-if the device path (source tag) is: /var/lib/libvirt/images/image1.qcow2
+if the device path (source tag) is: C</var/lib/libvirt/images/image1.qcow2>
 
 setting:
        BlockDeviceFormatBasename true
 
-will set the device name to: image1.qcow2
+will set the device name to: C<image1.qcow2>
 
 =item B<HostnameFormat> B<name|uuid|hostname|...>
 

diff --git a/src/virt.c b/src/virt.c
index e32150a..416383f 100644 (file)
--- a/src/virt.c
+++ b/src/virt.c
@@ -32,6 +32,7 @@
 #include <libxml/tree.h>
 #include <libxml/xpath.h>
 #include <libgen.h>
+#include <stdbool.h>
 
 /* Plugin name */
 #define PLUGIN_NAME "virt"
@@ -135,7 +136,7 @@ static enum plginst_field plugin_instance_format[PLGINST_MAX_FIELDS] =
 
 /* BlockDeviceFormat */
 enum bd_field {
-       dev,
+       target,
        source
 };
 
@@ -147,8 +148,8 @@ enum if_field {
 };
 
 /* BlockDeviceFormatBasename */
-char *blockdevice_format_basename="false";
-static enum bd_field blockdevice_format = dev;
+_Bool blockdevice_format_basename = false;
+static enum bd_field blockdevice_format = target;
 static enum if_field interface_format = if_name;
 
 /* Time that we last refreshed. */
@@ -352,8 +353,8 @@ lv_config (const char *key, const char *value)
     }
 
     if (strcasecmp (key, "BlockDeviceFormat") == 0) {
-        if (strcasecmp (value, "dev") == 0)
-            blockdevice_format = dev;
+        if (strcasecmp (value, "target") == 0)
+            blockdevice_format = target;
         else if (strcasecmp (value, "source") == 0)
             blockdevice_format = source;
         else {
@@ -364,9 +365,9 @@ lv_config (const char *key, const char *value)
     }
     if (strcasecmp (key, "BlockDeviceFormatBasename") == 0) {
         if (strcasecmp (value, "true") == 0)
-            blockdevice_format_basename = "true";
+            blockdevice_format_basename = true;
         else if (strcasecmp (value, "false") == 0)
-            blockdevice_format_basename = "false";
+            blockdevice_format_basename = false;
         else {
             ERROR (PLUGIN_NAME " plugin: unknown BlockDeviceFormatBasename: %s", value);
             return -1;
@@ -613,23 +614,26 @@ lv_read (void)
                     &stats, sizeof stats) != 0)
             continue;
 
-       char *new_path=NULL;
-       if( 0==strcasecmp("true", blockdevice_format_basename) && source==blockdevice_format){ //valid only if we use source (full path to the device)
-               new_path=strdup(basename(block_devices[i].path));
-       }else{
-               new_path=strdup(block_devices[i].path);
+       char *type_instance = NULL;
+       if( blockdevice_format_basename && blockdevice_format == source ) //valid only if we use "source" (full path to the device)
+       {
+               type_instance = strdup(basename(block_devices[i].path));
+       }
+       else
+       {
+               type_instance = strdup(block_devices[i].path);
        }
         if ((stats.rd_req != -1) && (stats.wr_req != -1))
             submit_derive2 ("disk_ops",
                     (derive_t) stats.rd_req, (derive_t) stats.wr_req,
-                    block_devices[i].dom, new_path);
+                    block_devices[i].dom, type_instance);
 
         if ((stats.rd_bytes != -1) && (stats.wr_bytes != -1))
             submit_derive2 ("disk_octets",
                     (derive_t) stats.rd_bytes, (derive_t) stats.wr_bytes,
-                    block_devices[i].dom, new_path);
+                    block_devices[i].dom, type_instance);
        
-       free(new_path);
+       sfree(type_instance);
     } /* for (nr_block_devices) */
 
     /* Get interface stats for each domain. */
@@ -758,17 +762,12 @@ refresh_lists (void)
             xpath_ctx = xmlXPathNewContext (xml_doc);
 
             /* Block devices. */
-           char * bd_xmlpath=NULL;
-           if( source == blockdevice_format ){
-                   bd_xmlpath="/domain/devices/disk/source[@dev]";
-           }else{
-                       if( dev == blockdevice_format ){
-                               bd_xmlpath="/domain/devices/disk/target[@dev]";
-                       }
+           char * bd_xmlpath = "/domain/devices/disk/target[@dev]";  //the default behavior
+           if( blockdevice_format == source )
+           {
+               bd_xmlpath = "/domain/devices/disk/source[@dev]";
            }
-            xpath_obj = xmlXPathEval
-                  ((xmlChar *) bd_xmlpath,
-                   xpath_ctx);
+            xpath_obj = xmlXPathEval ((xmlChar *) bd_xmlpath, xpath_ctx);
 
             if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
                 xpath_obj->nodesetval == NULL)