[Xen-devel] [PATCH][XENTOP][3/4] Display blktap statistics.

["Satoshi Uchida" <s-uchida@xxxxxxxxxxxxx>]

This patch modify collecting of all VBD's statistics.
The libxenstat library is also searched tap-x-y in /sys/devices/xen-backend/ , 
but not only vbd-x-y.


# HG changeset patch
# User s-uchida@xxxxxxxxxxxxx
# Date 1180665629 -32400
# Node ID 1768a89bb87824249827d935d7803d8193bdeb05
# Parent  d06f4b7fec7f132030fa7bd2dbb358c8bd761a6a
XENSTAT: Adding to scan blktap information.

Sigened-off-by: Satoshi UCHIDA <s-uchida@xxxxxxxxxxxxx>

diff -r d06f4b7fec7f -r 1768a89bb878 tools/xenstat/libxenstat/src/xenstat.c
--- a/tools/xenstat/libxenstat/src/xenstat.c    Fri Jun 01 11:38:10 2007 +0900
+++ b/tools/xenstat/libxenstat/src/xenstat.c    Fri Jun 01 11:40:29 2007 +0900
@@ -625,6 +625,12 @@ static void xenstat_free_vbds(xenstat_no
                free(node->domains[i].vbds);
 }
 
+/* Get the back driver type  for Virtual Block Device */
+unsigned int xenstat_vbd_type(xenstat_vbd * vbd)
+{
+       return vbd->back_type;
+}
+
 /* Get the major number of VBD device */
 unsigned int xenstat_vbd_dev(xenstat_vbd * vbd)
 {
diff -r d06f4b7fec7f -r 1768a89bb878 tools/xenstat/libxenstat/src/xenstat.h
--- a/tools/xenstat/libxenstat/src/xenstat.h    Fri Jun 01 11:38:10 2007 +0900
+++ b/tools/xenstat/libxenstat/src/xenstat.h    Fri Jun 01 11:40:29 2007 +0900
@@ -172,6 +172,10 @@ unsigned long long xenstat_network_tdrop
 /*
  * VBD functions - extract information from a xen_vbd
  */
+
+/* Get the back driver type  for Virtual Block Device */
+unsigned int xenstat_vbd_type(xenstat_vbd * vbd);
+
 /* Get the device number for Virtual Block Device */
 unsigned int xenstat_vbd_dev(xenstat_vbd * vbd);
 
diff -r d06f4b7fec7f -r 1768a89bb878 
tools/xenstat/libxenstat/src/xenstat_linux.c
--- a/tools/xenstat/libxenstat/src/xenstat_linux.c      Fri Jun 01 11:38:10 
2007 +0900
+++ b/tools/xenstat/libxenstat/src/xenstat_linux.c      Fri Jun 01 11:40:29 
2007 +0900
@@ -204,17 +204,23 @@ int xenstat_collect_vbds(xenstat_node * 
                int ret;
                char buf[256];
 
-
-               ret = sscanf(dp->d_name, "vbd-%u-%u", &domid, &vbd.dev);
-               if (ret != 2)
+               ret = sscanf(dp->d_name, "%3s-%u-%u", buf, &domid, &vbd.dev);
+               if (ret != 3)
+                       continue;
+
+               if (strcmp(buf,"vbd") == 0)
+                       vbd.back_type = 1;
+               else if (strcmp(buf,"tap") == 0)
+                       vbd.back_type = 2;
+               else
                        continue;
 
                domain = xenstat_node_domain(node, domid);
                if (domain == NULL) {
                        fprintf(stderr,
-                               "Found interface vbd-%u-%u but domain %u"
+                               "Found interface %s-%u-%u but domain %u"
                                " does not exist.\n",
-                               domid, vbd.dev, domid);
+                               buf, domid, vbd.dev, domid);
                        continue;
                }
 
diff -r d06f4b7fec7f -r 1768a89bb878 tools/xenstat/libxenstat/src/xenstat_priv.h
--- a/tools/xenstat/libxenstat/src/xenstat_priv.h       Fri Jun 01 11:38:10 
2007 +0900
+++ b/tools/xenstat/libxenstat/src/xenstat_priv.h       Fri Jun 01 11:40:29 
2007 +0900
@@ -87,10 +87,11 @@ struct xenstat_network {
 };
 
 struct xenstat_vbd {
-       unsigned int dev;
-       unsigned long long oo_reqs;
-       unsigned long long rd_reqs;
-       unsigned long long wr_reqs;
+       unsigned int back_type;
+       unsigned int dev;
+       unsigned long long oo_reqs;
+       unsigned long long rd_reqs;
+       unsigned long long wr_reqs;
 };
 
 extern int xenstat_collect_networks(xenstat_node * node);


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