Re: [libvirt] [PATCH 12/12] getstats: start crawling backing chain for qemu

Wire up backing chain recursion. Note that for now, we just use

Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 55 +++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 46 insertions(+), 9 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index feaa4a2..b57beeb 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c

@@ -18550,8 +18566,16 @@ qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver, if (virStorageSourceIsLocalStorage(src) && src->path) QEMU_ADD_NAME_PARAM(record, maxparams, "block", "path", block_idx, src->path); + if (backing_idx) + QEMU_ADD_BLOCK_PARAM_UI(record, maxparams, block_idx, "backingIndex", + backing_idx); - if (abbreviated || !disk->info.alias || + /* FIXME: qemu gives information on backing files, but we aren't + * currently storing it into the stats table - we need a common + * key in qemu_monitor_json.c:qemuMonitorGetAllBlockStatsInfo and + * here for getting at that information, probably something like + * asprintf("%s.%d", alias, backing_idx). */

+ if (abbreviated || backing_idx || !disk->info.alias || !(entry = virHashLookup(stats, disk->info.alias))) { if (qemuStorageLimitsRefresh(driver, cfg, dom, disk, src, NULL, NULL) < 0)