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tests: qemublock: Add test for bitmap detection
Test the extraction of data about changed block tracking bitmaps. The first test case adds a simple scenario of multiple bitmaps in one layer. The test data will be also later reused for testing the code that determines which bitmaps to merge for an incremental backup. The sequence of bitmaps was created by the libvirt checkpoint API with the following sequence of commands: virsh checkpoint-create-as VM --name a virsh checkpoint-create-as VM --name b virsh checkpoint-create-as VM --name c virsh checkpoint-create-as VM --name d virsh checkpoint-create-as VM --name current Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Krempa
parent
7a185d2f6e
commit
9aac9d5bda
@ -27,6 +27,7 @@
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# include "virlog.h"
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# include "qemu/qemu_block.h"
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# include "qemu/qemu_qapi.h"
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# include "qemu/qemu_monitor_json.h"
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# include "qemu/qemu_command.h"
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@ -492,6 +493,71 @@ testQemuDiskXMLToPropsValidateFileSrcOnly(const void *opaque)
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}
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static const char *bitmapDetectPrefix = "qemublocktestdata/bitmap/";
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static void
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testQemuDetectBitmapsWorker(virHashTablePtr nodedata,
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const char *nodename,
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virBufferPtr buf)
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{
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qemuBlockNamedNodeDataPtr data;
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size_t i;
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if (!(data = virHashLookup(nodedata, nodename)))
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return;
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virBufferAsprintf(buf, "%s:\n", nodename);
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virBufferAdjustIndent(buf, 1);
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for (i = 0; i < data->nbitmaps; i++) {
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qemuBlockNamedNodeDataBitmapPtr bitmap = data->bitmaps[i];
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virBufferAsprintf(buf, "%8s: record:%d busy:%d persist:%d inconsist:%d gran:%llu dirty:%llu\n",
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bitmap->name, bitmap->recording, bitmap->busy,
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bitmap->persistent, bitmap->inconsistent,
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bitmap->granularity, bitmap->dirtybytes);
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}
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virBufferAdjustIndent(buf, -1);
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}
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static int
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testQemuDetectBitmaps(const void *opaque)
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{
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const char *name = opaque;
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g_autoptr(virJSONValue) nodedatajson = NULL;
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g_autoptr(virHashTable) nodedata = NULL;
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g_autofree char *actual = NULL;
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g_autofree char *expectpath = NULL;
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g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
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size_t i;
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expectpath = g_strdup_printf("%s/%s%s.out", abs_srcdir,
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bitmapDetectPrefix, name);
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if (!(nodedatajson = virTestLoadFileJSON(bitmapDetectPrefix, name,
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".json", NULL)))
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return -1;
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if (!(nodedata = qemuMonitorJSONBlockGetNamedNodeDataJSON(nodedatajson))) {
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VIR_TEST_VERBOSE("failed to load nodedata JSON");
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return -1;
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}
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/* we detect for the first 30 nodenames for simplicity */
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for (i = 0; i < 30; i++) {
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g_autofree char *nodename = g_strdup_printf("libvirt-%zu-format", i);
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testQemuDetectBitmapsWorker(nodedata, nodename, &buf);
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}
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actual = virBufferContentAndReset(&buf);
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return virTestCompareToFile(actual, expectpath);
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}
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static int
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mymain(void)
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{
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@ -702,6 +768,15 @@ mymain(void)
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TEST_IMAGE_CREATE("network-ssh-qcow2", NULL);
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TEST_IMAGE_CREATE("network-sheepdog-qcow2", NULL);
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# define TEST_BITMAP_DETECT(testname) \
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do { \
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if (virTestRun("bitmap detect " testname, \
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testQemuDetectBitmaps, testname) < 0) \
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ret = -1; \
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} while (0)
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TEST_BITMAP_DETECT("basic");
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cleanup:
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virHashFree(diskxmljsondata.schema);
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qemuTestDriverFree(&driver);
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117
tests/qemublocktestdata/bitmap/basic.json
Normal file
117
tests/qemublocktestdata/bitmap/basic.json
Normal file
@ -0,0 +1,117 @@
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[
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{
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"iops_rd": 0,
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"detect_zeroes": "off",
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"image": {
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"virtual-size": 10485760,
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"filename": "/tmp/pull4.qcow2",
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"cluster-size": 65536,
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"format": "qcow2",
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"actual-size": 200704,
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"format-specific": {
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"type": "qcow2",
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"data": {
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"compat": "1.1",
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"lazy-refcounts": false,
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"refcount-bits": 16,
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"corrupt": false
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}
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},
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"dirty-flag": false
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},
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"iops_wr": 0,
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"ro": false,
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"node-name": "libvirt-1-format",
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"backing_file_depth": 0,
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"drv": "qcow2",
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"iops": 0,
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"bps_wr": 0,
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"write_threshold": 0,
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"dirty-bitmaps": [
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{
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"name": "current",
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"recording": true,
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"persistent": true,
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"busy": false,
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"status": "active",
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"granularity": 65536,
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"count": 0
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},
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{
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"name": "d",
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"recording": false,
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"persistent": true,
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"busy": false,
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"status": "disabled",
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"granularity": 65536,
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"count": 0
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},
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{
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"name": "c",
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"recording": false,
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"persistent": true,
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"busy": false,
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"status": "disabled",
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"granularity": 65536,
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"count": 0
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},
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{
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"name": "b",
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"recording": false,
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"persistent": true,
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"busy": false,
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"status": "disabled",
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"granularity": 65536,
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"count": 0
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},
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{
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"name": "a",
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"recording": false,
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"persistent": true,
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"busy": false,
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"status": "disabled",
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"granularity": 65536,
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"count": 0
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}
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],
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"encrypted": false,
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"bps": 0,
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"bps_rd": 0,
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"cache": {
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"no-flush": false,
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"direct": false,
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"writeback": true
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},
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"file": "/tmp/pull4.qcow2",
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"encryption_key_missing": false
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},
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{
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"iops_rd": 0,
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"detect_zeroes": "off",
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"image": {
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"virtual-size": 197120,
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"filename": "/tmp/pull4.qcow2",
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"format": "file",
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"actual-size": 200704,
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"dirty-flag": false
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},
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"iops_wr": 0,
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"ro": false,
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"node-name": "libvirt-1-storage",
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"backing_file_depth": 0,
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"drv": "file",
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"iops": 0,
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"bps_wr": 0,
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"write_threshold": 0,
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"encrypted": false,
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"bps": 0,
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"bps_rd": 0,
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"cache": {
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"no-flush": false,
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"direct": false,
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"writeback": true
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},
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"file": "/tmp/pull4.qcow2",
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"encryption_key_missing": false
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}
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]
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6
tests/qemublocktestdata/bitmap/basic.out
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6
tests/qemublocktestdata/bitmap/basic.out
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@ -0,0 +1,6 @@
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libvirt-1-format:
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current: record:1 busy:0 persist:1 inconsist:0 gran:65536 dirty:0
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d: record:0 busy:0 persist:1 inconsist:0 gran:65536 dirty:0
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c: record:0 busy:0 persist:1 inconsist:0 gran:65536 dirty:0
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b: record:0 busy:0 persist:1 inconsist:0 gran:65536 dirty:0
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a: record:0 busy:0 persist:1 inconsist:0 gran:65536 dirty:0
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