[PATCHv2 5/6] Implemet lxcDomainBlockStats for lxc driver

[Thorsten Behrens <tbehrens@xxxxxxxx>]

---

Notes on v2:
 - works as-is, will send lxcDomainBlockStatsFlags patch separately

 src/lxc/lxc_driver.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 19426f5..bf6fd5c 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2023,6 +2023,56 @@ lxcDomainGetSchedulerParameters(virDomainPtr domain,
 
 
 static int
+lxcDomainBlockStats(virDomainPtr dom,
+                    const char *path,
+                    struct _virDomainBlockStats *stats)
+{
+    int ret = -1, idx;
+    virDomainObjPtr vm;
+    virDomainDiskDefPtr disk = NULL;
+    virLXCDomainObjPrivatePtr priv;
+
+    if (!(vm = lxcDomObjFromDomain(dom)))
+        return ret;
+
+    priv = vm->privateData;
+
+    if (virDomainBlockStatsEnsureACL(dom->conn, vm->def) < 0)
+        goto cleanup;
+
+    if (!virDomainObjIsActive(vm)) {
+        virReportError(VIR_ERR_OPERATION_INVALID,
+                       "%s", _("domain is not running"));
+        goto cleanup;
+    }
+
+    if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
+        virReportError(VIR_ERR_INVALID_ARG,
+                       _("invalid path: %s"), path);
+        goto cleanup;
+    }
+    disk = vm->def->disks[idx];
+
+    if (!disk->info.alias) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("missing disk device alias name for %s"), disk->dst);
+        goto cleanup;
+    }
+
+    ret = virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
+                                            disk->info.alias,
+                                            &stats->rd_bytes,
+                                            &stats->wr_bytes,
+                                            &stats->rd_req,
+                                            &stats->wr_req);
+cleanup:
+    if (vm)
+        virObjectUnlock(vm);
+    return ret;
+}
+
+
+static int
 lxcDomainSetBlkioParameters(virDomainPtr dom,
                             virTypedParameterPtr params,
                             int nparams,
@@ -4958,6 +5008,7 @@ static virDriver lxcDriver = {
     .domainGetSchedulerParametersFlags = lxcDomainGetSchedulerParametersFlags, /* 0.9.2 */
     .domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
     .domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2 */
+    .domainBlockStats = lxcDomainBlockStats, /* 0.4.1 */
     .domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
     .domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
     .nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
-- 
1.8.4

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