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vircgroup: introduce virCgroupV2GetBlkioIoDeviceServiced

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-08-17 16:52:24 +02:00
parent 709260add9
commit 93fa369df5
1 changed files with 64 additions and 0 deletions
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64
src/util/vircgroupv2.c
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@ -630,6 +630,69 @@ virCgroupV2GetBlkioIoServiced(virCgroupPtr group,
}
static int
virCgroupV2GetBlkioIoDeviceServiced(virCgroupPtr group,
const char *path,
long long *bytes_read,
long long *bytes_write,
long long *requests_read,
long long *requests_write)
{
VIR_AUTOFREE(char *) str1 = NULL;
VIR_AUTOFREE(char *) str2 = NULL;
char *p1;
size_t i;
const char *value_names[] = {
"rbytes=",
"wbytes=",
"rios=",
"wios=",
};
long long *value_ptrs[] = {
bytes_read,
bytes_write,
requests_read,
requests_write
};
if (virCgroupGetValueStr(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.stat", &str1) < 0) {
return -1;
}
if (!(str2 = virCgroupGetBlockDevString(path)))
return -1;
if (!(p1 = strstr(str1, str2))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot find byte stats for block device '%s'"),
str2);
return -1;
}
for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
if (!(p1 = strstr(p1, value_names[i]))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot find byte '%s' stats for block device '%s'"),
value_names[i], str2);
return -1;
}
p1 += strlen(value_names[i]);
if (virStrToLong_ll(p1, &p1, 10, value_ptrs[i]) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse '%s' stat '%s'"),
value_names[i], p1);
return -1;
}
}
return 0;
}
virCgroupBackend virCgroupV2Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V2,
@ -655,6 +718,7 @@ virCgroupBackend virCgroupV2Backend = {
.setBlkioWeight = virCgroupV2SetBlkioWeight,
.getBlkioWeight = virCgroupV2GetBlkioWeight,
.getBlkioIoServiced = virCgroupV2GetBlkioIoServiced,
.getBlkioIoDeviceServiced = virCgroupV2GetBlkioIoDeviceServiced,
};