Re: [libvirt] [PATCH 3/5] qemu: monitor: Open-code retrieval of wr_highest_offset

Instead of using qemuMonitorJSONDevGetBlockExtent (which I plan to remove later) extract the data in place. Additionally add a flag that will be set when the wr_highest_offset was extracted correctly so that callers can act according to that. The test case addition should help make sure that everything works. --- src/qemu/qemu_monitor.h | 1 + src/qemu/qemu_monitor_json.c | 10 ++++++++-- tests/qemumonitorjsontest.c | 20 +++++++++++++++----- tests/qemumonitortest.c | 10 +++++----- 4 files changed, 29 insertions(+), 12 deletions(-) diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index 1afc344..b4d6538 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -379,6 +379,7 @@ struct _qemuBlockStats { unsigned long long capacity; unsigned long long physical; unsigned long long wr_highest_offset; + bool wr_highest_offset_valid; };

int qemuMonitorGetAllBlockStatsInfo(qemuMonitorPtr mon, diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index 11c45a1..b2ce33f 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -1699,6 +1699,8 @@ qemuMonitorJSONGetOneBlockStatsInfo(virJSONValuePtr dev, { qemuBlockStatsPtr bstats = NULL; virJSONValuePtr stats; + virJSONValuePtr parent; + virJSONValuePtr parentstats; int ret = -1; int nstats = 0; char *entry_name = qemuDomainStorageAlias(dev_name, depth); @@ -1735,8 +1737,12 @@ qemuMonitorJSONGetOneBlockStatsInfo(virJSONValuePtr dev, QEMU_MONITOR_BLOCK_STAT_GET("flush_total_time_ns", bstats->flush_total_times, false); #undef QEMU_MONITOR_BLOCK_STAT_GET - /* it's ok to not have this information here. Just skip silently. */ - qemuMonitorJSONDevGetBlockExtent(dev, &bstats->wr_highest_offset); + if ((parent = virJSONValueObjectGetObject(dev, "parent")) && + (parentstats = virJSONValueObjectGetObject(parent, "stats"))) { + if (virJSONValueObjectGetNumberUlong(parentstats, "wr_highest_offset", + &bstats->wr_highest_offset) == 0) + bstats->wr_highest_offset_valid = true; + } if (virHashAddEntry(hash, entry_name, bstats) < 0) goto cleanup; diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c index 0623275..6246737 100644 --- a/tests/qemumonitorjsontest.c +++ b/tests/qemumonitorjsontest.c @@ -1546,8 +1546,16 @@ testQemuMonitorJSONqemuMonitorJSONGetBlockStatsInfo(const void *data) goto cleanup; \ } +#define CHECK0ULL(var, value) \ + if (stats->var != value) { \ + virReportError(VIR_ERR_INTERNAL_ERROR, \ + "Invalid " #var " value: %llu, expected %llu", \ + stats->var, value); \ + goto cleanup; \ + } + #define CHECK(NAME, RD_REQ, RD_BYTES, RD_TOTAL_TIMES, WR_REQ, WR_BYTES, \ - WR_TOTAL_TIMES, FLUSH_REQ, FLUSH_TOTAL_TIMES) \ + WR_TOTAL_TIMES, FLUSH_REQ, FLUSH_TOTAL_TIMES, WR_HIGHEST_OFFSET) \ if (!(stats = virHashLookup(blockstats, NAME))) { \ virReportError(VIR_ERR_INTERNAL_ERROR, \ "block stats for device '%s' is missing", NAME); \ @@ -1560,7 +1568,8 @@ testQemuMonitorJSONqemuMonitorJSONGetBlockStatsInfo(const void *data) CHECK0(wr_bytes, WR_BYTES) \ CHECK0(wr_total_times, WR_TOTAL_TIMES) \ CHECK0(flush_req, FLUSH_REQ) \ - CHECK0(flush_total_times, FLUSH_TOTAL_TIMES) + CHECK0(flush_total_times, FLUSH_TOTAL_TIMES) \ + CHECK0ULL(wr_highest_offset, WR_HIGHEST_OFFSET) if (qemuMonitorGetAllBlockStatsInfo(qemuMonitorTestGetMonitor(test), &blockstats, false) < 0) @@ -1572,9 +1581,9 @@ testQemuMonitorJSONqemuMonitorJSONGetBlockStatsInfo(const void *data) goto cleanup; } - CHECK("virtio-disk0", 1279, 28505088, 640616474, 174, 2845696, 530699221, 0, 0) - CHECK("virtio-disk1", 85, 348160, 8232156, 0, 0, 0, 0, 0) - CHECK("ide0-1-0", 16, 49250, 1004952, 0, 0, 0, 0, 0) + CHECK("virtio-disk0", 1279, 28505088, 640616474, 174, 2845696, 530699221, 0, 0, 5256018944ULL) + CHECK("virtio-disk1", 85, 348160, 8232156, 0, 0, 0, 0, 0, 0ULL) + CHECK("ide0-1-0", 16, 49250, 1004952, 0, 0, 0, 0, 0, 0ULL)

if (qemuMonitorJSONGetBlockExtent(qemuMonitorTestGetMonitor(test), "virtio-disk0", &extent) < 0) @@ -1613,6 +1622,7 @@ testQemuMonitorJSONqemuMonitorJSONGetBlockStatsInfo(const void *data) #undef CHECK #undef CHECK0 +#undef CHECK0ULL cleanup: qemuMonitorTestFree(test); diff --git a/tests/qemumonitortest.c b/tests/qemumonitortest.c index 0125962..9d8d70a 100644 --- a/tests/qemumonitortest.c +++ b/tests/qemumonitortest.c @@ -94,11 +94,11 @@ struct blockInfoData { static const struct blockInfoData testBlockInfoData[] = { /* NAME, rd_req, rd_bytes, wr_req, wr_bytes, rd_total_time, wr_total_time, flush_req, flush_total_time */

- {"vda", {11, 12, 13, 14, 15, 16, 17, 18, 0, 0, 0}}, - {"vdb", {21, 22, 23, 24, 25, 26, 27, 28, 0, 0, 0}}, - {"vdc", {31, 32, 33, -1, 35, 36, 37, 38, 0, 0, 0}}, - {"vdd", {-1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0}}, - {"vde", {41, 42, 43, 44, 45, 46, 47, 48, 0, 0, 0}} + {"vda", {11, 12, 13, 14, 15, 16, 17, 18, 0, 0, 0, false}}, + {"vdb", {21, 22, 23, 24, 25, 26, 27, 28, 0, 0, 0, false}}, + {"vdc", {31, 32, 33, -1, 35, 36, 37, 38, 0, 0, 0, false}}, + {"vdd", {-1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, false}}, + {"vde", {41, 42, 43, 44, 45, 46, 47, 48, 0, 0, 0, false}}

}; static const char testBlockInfoReply[] =