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Fix block statistics with newer versions of Xen

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Apparently the xen block device statistics moved from
"/sys/devices/xen-backend/vbd-%d-%d/statistics/%s"
to
"/sys/bus/xen-backend/devices/vbd-%d-%d/statistics/%s"

* src/xen/block_stats.c: try the extra path in case of failure to
  find the statistics in /sys
This commit is contained in:
Guido Günther 2010-09-10 15:57:35 +02:00 committed by Daniel Veillard
parent dfec22cc60
commit 8a70113a99
1 changed files with 12 additions and 0 deletions
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12
src/xen/block_stats.c
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@ -117,6 +117,18 @@ read_bd_stat (int device, int domid, const char *str)
char path[PATH_MAX]; char path[PATH_MAX];
int64_t r; int64_t r;
snprintf (path, sizeof path,
"/sys/bus/xen-backend/devices/vbd-%d-%d/statistics/%s",
domid, device, str);
r = read_stat (path);
if (r >= 0) return r;
snprintf (path, sizeof path,
"/sys/bus/xen-backend/devices/tap-%d-%d/statistics/%s",
domid, device, str);
r = read_stat (path);
if (r >= 0) return r;
snprintf (path, sizeof path, snprintf (path, sizeof path,
"/sys/devices/xen-backend/vbd-%d-%d/statistics/%s", "/sys/devices/xen-backend/vbd-%d-%d/statistics/%s",
domid, device, str); domid, device, str);