[libvirt] [PATCH 02/10] vz: prepare disks names before getting all disks stats

[Nikolay Shirokovskiy]

As a preparation to get statistics without domain lock. Resolving
libvirt names to vzsdk ones is not possible without domain lock
thus we need to do it beforehand.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---
 src/vz/vz_driver.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/vz/vz_driver.c b/src/vz/vz_driver.c
index 725076f..0609594 100644
--- a/src/vz/vz_driver.c
+++ b/src/vz/vz_driver.c
@@ -1275,6 +1275,8 @@ vzDomainBlockStats(virDomainPtr domain, const char *path,
     size_t i;
     int idx;
     char *disk = NULL;
+    char **disks = NULL;
+    int ndisks = 0;
 
     if (!(dom = vzDomObjFromDomainRef(domain)))
         return -1;
@@ -1300,10 +1302,16 @@ vzDomainBlockStats(virDomainPtr domain, const char *path,
 
 #undef PARALLELS_ZERO_STATS
 
-        for (i = 0; i < dom->def->ndisks; i++) {
-            if (!(disk = prlsdkGetDiskStatName(dom->def->disks[i])))
+        ndisks = dom->def->ndisks;
+
+        if (VIR_ALLOC_N(disks, ndisks))
+            goto cleanup;
+
+        for (i = 0; i < ndisks; i++)
+            if (!(disks[i] = prlsdkGetDiskStatName(dom->def->disks[i])))
                 goto cleanup;
 
+        for (i = 0; i < ndisks; i++) {
             if (prlsdkGetBlockStats(dom, disk, &s) < 0)
                 goto cleanup;
 
@@ -1314,8 +1322,6 @@ vzDomainBlockStats(virDomainPtr domain, const char *path,
         PARALLELS_BLOCK_STATS_FOREACH(PARALLELS_SUM_STATS)
 
 #undef PARALLELS_SUM_STATS
-
-            VIR_FREE(disk);
         }
     }
     stats->errs = -1;
@@ -1325,6 +1331,7 @@ vzDomainBlockStats(virDomainPtr domain, const char *path,
     if (dom)
         virDomainObjEndAPI(&dom);
     VIR_FREE(disk);
+    virStringFreeListCount(disks, ndisks);
 
     return ret;
 }
-- 
1.8.3.1