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libvirt/tests/domainsnapshotxml2xmltest.c
Eric Blake f105627992 snapshot: Drop virDomainSnapshotDef.current
The only use for the 'current' member of virDomainSnapshotDef was with
the PARSE/FORMAT_INTERNAL flag for controlling an internal-use
<active> element marking whether a particular snapshot definition was
current, and even then, only by the qemu driver on output, and by qemu
and test driver on input. But this duplicates vm->snapshot_current,
and gets in the way of potential simplifications to have qemu store a
single file for all snapshots rather than one file per snapshot.  Get
rid of the member by adding a bool* parameter during parse (ignored if
the PARSE_INTERNAL flag is not set), and by adding a new flag during
format (if FORMAT_INTERNAL is set, the value printed in <active>
depends on the new FORMAT_CURRENT).

Then update the qemu driver accordingly, which involves hoisting
assignments to vm->current_snapshot to occur prior to any point where
a snapshot XML file is written (although qemu kept
vm->current_snapshot and snapshot->def_current in sync by the end of
the function, they were not always identical in the middle of
functions, so the shuffling gets a bit interesting). Later patches
will clean up some of that confusing churn to vm->current_snapshot.

Note: even if later patches refactor qemu to no longer use
FORMAT_INTERNAL for output (by storing bulk snapshot XML instead), we
will always need PARSE_INTERNAL for input (because on upgrade, a new
libvirt still has to parse XML left from a previous libvirt).

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
2019-03-22 01:15:20 -05:00

244 lines
7.1 KiB
C

#include <config.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <regex.h>
#include "testutils.h"
#ifdef WITH_QEMU
# include "internal.h"
# include "qemu/qemu_conf.h"
# include "qemu/qemu_domain.h"
# include "testutilsqemu.h"
# include "virstring.h"
# define VIR_FROM_THIS VIR_FROM_NONE
static virQEMUDriver driver;
/* This regex will skip the following XML constructs in test files
* that are dynamically generated and thus problematic to test:
* <name>1234352345</name> if the snapshot has no name,
* <creationTime>23523452345</creationTime>,
* <state>nostate</state> as the backend code doesn't fill this
*/
static const char *testSnapshotXMLVariableLineRegexStr =
"(<(name|creationTime)>[0-9]+</(name|creationTime)>|"
"<state>nostate</state>)";
regex_t *testSnapshotXMLVariableLineRegex = NULL;
static char *
testFilterXML(char *xml)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
char **xmlLines = NULL;
char **xmlLine;
char *ret = NULL;
if (!(xmlLines = virStringSplit(xml, "\n", 0))) {
VIR_FREE(xml);
goto cleanup;
}
VIR_FREE(xml);
for (xmlLine = xmlLines; *xmlLine; xmlLine++) {
if (regexec(testSnapshotXMLVariableLineRegex,
*xmlLine, 0, NULL, 0) == 0)
continue;
virBufferStrcat(&buf, *xmlLine, "\n", NULL);
}
if (virBufferCheckError(&buf) < 0)
goto cleanup;
ret = virBufferContentAndReset(&buf);
cleanup:
virBufferFreeAndReset(&buf);
virStringListFree(xmlLines);
return ret;
}
static int
testCompareXMLToXMLFiles(const char *inxml,
const char *outxml,
const char *uuid,
bool internal,
bool redefine)
{
char *inXmlData = NULL;
char *outXmlData = NULL;
char *actual = NULL;
int ret = -1;
virDomainSnapshotDefPtr def = NULL;
unsigned int parseflags = VIR_DOMAIN_SNAPSHOT_PARSE_DISKS;
unsigned int formatflags = VIR_DOMAIN_SNAPSHOT_FORMAT_SECURE;
bool cur;
if (internal) {
parseflags |= VIR_DOMAIN_SNAPSHOT_PARSE_INTERNAL;
formatflags |= VIR_DOMAIN_SNAPSHOT_FORMAT_INTERNAL;
}
if (redefine)
parseflags |= VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE;
if (virTestLoadFile(inxml, &inXmlData) < 0)
goto cleanup;
if (virTestLoadFile(outxml, &outXmlData) < 0)
goto cleanup;
if (!(def = virDomainSnapshotDefParseString(inXmlData, driver.caps,
driver.xmlopt, &cur,
parseflags)))
goto cleanup;
if (cur)
formatflags |= VIR_DOMAIN_SNAPSHOT_FORMAT_CURRENT;
if (!(actual = virDomainSnapshotDefFormat(uuid, def, driver.caps,
driver.xmlopt,
formatflags)))
goto cleanup;
if (!redefine) {
if (!(actual = testFilterXML(actual)))
goto cleanup;
if (!(outXmlData = testFilterXML(outXmlData)))
goto cleanup;
}
if (STRNEQ(outXmlData, actual)) {
virTestDifferenceFull(stderr, outXmlData, outxml, actual, inxml);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(inXmlData);
VIR_FREE(outXmlData);
VIR_FREE(actual);
virDomainSnapshotDefFree(def);
return ret;
}
struct testInfo {
const char *inxml;
const char *outxml;
const char *uuid;
bool internal;
bool redefine;
};
static int
testCompareXMLToXMLHelper(const void *data)
{
const struct testInfo *info = data;
return testCompareXMLToXMLFiles(info->inxml, info->outxml, info->uuid,
info->internal, info->redefine);
}
static int
mymain(void)
{
int ret = 0;
if (qemuTestDriverInit(&driver) < 0)
return EXIT_FAILURE;
if (VIR_ALLOC(testSnapshotXMLVariableLineRegex) < 0)
goto cleanup;
if (regcomp(testSnapshotXMLVariableLineRegex,
testSnapshotXMLVariableLineRegexStr,
REG_EXTENDED | REG_NOSUB) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
"failed to compile test regex");
goto cleanup;
}
# define DO_TEST(prefix, name, inpath, outpath, uuid, internal, redefine) \
do { \
const struct testInfo info = {abs_srcdir "/" inpath "/" name ".xml", \
abs_srcdir "/" outpath "/" name ".xml", \
uuid, internal, redefine}; \
if (virTestRun("SNAPSHOT XML-2-XML " prefix " " name, \
testCompareXMLToXMLHelper, &info) < 0) \
ret = -1; \
} while (0)
# define DO_TEST_IN(name, uuid) DO_TEST("in->in", name,\
"domainsnapshotxml2xmlin",\
"domainsnapshotxml2xmlin",\
uuid, false, false)
# define DO_TEST_OUT(name, uuid, internal) DO_TEST("out->out", name,\
"domainsnapshotxml2xmlout",\
"domainsnapshotxml2xmlout",\
uuid, internal, true)
# define DO_TEST_INOUT(name, uuid, internal, redefine) \
DO_TEST("in->out", name,\
"domainsnapshotxml2xmlin",\
"domainsnapshotxml2xmlout",\
uuid, internal, redefine)
/* Unset or set all envvars here that are copied in qemudBuildCommandLine
* using ADD_ENV_COPY, otherwise these tests may fail due to unexpected
* values for these envvars */
setenv("PATH", "/bin", 1);
DO_TEST_OUT("all_parameters", "9d37b878-a7cc-9f9a-b78f-49b3abad25a8", true);
DO_TEST_OUT("disk_snapshot_redefine", "c7a5fdbd-edaf-9455-926a-d65c16db1809", true);
DO_TEST_OUT("full_domain", "c7a5fdbd-edaf-9455-926a-d65c16db1809", true);
DO_TEST_OUT("noparent_nodescription_noactive", NULL, false);
DO_TEST_OUT("noparent_nodescription", NULL, true);
DO_TEST_OUT("noparent", "9d37b878-a7cc-9f9a-b78f-49b3abad25a8", false);
DO_TEST_OUT("metadata", "c7a5fdbd-edaf-9455-926a-d65c16db1809", false);
DO_TEST_OUT("external_vm_redefine", "c7a5fdbd-edaf-9455-926a-d65c16db1809", false);
DO_TEST_INOUT("empty", "9d37b878-a7cc-9f9a-b78f-49b3abad25a8", false, false);
DO_TEST_INOUT("noparent", "9d37b878-a7cc-9f9a-b78f-49b3abad25a8", false, false);
DO_TEST_INOUT("external_vm", NULL, false, false);
DO_TEST_INOUT("noparent", "9d37b878-a7cc-9f9a-b78f-49b3abad25a8", false, false);
DO_TEST_INOUT("disk_snapshot", NULL, false, false);
DO_TEST_INOUT("disk_driver_name_null", NULL, false, false);
DO_TEST_IN("name_and_description", NULL);
DO_TEST_IN("description_only", NULL);
DO_TEST_IN("name_only", NULL);
cleanup:
if (testSnapshotXMLVariableLineRegex)
regfree(testSnapshotXMLVariableLineRegex);
VIR_FREE(testSnapshotXMLVariableLineRegex);
qemuTestDriverFree(&driver);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN(mymain)
#else
int
main(void)
{
return EXIT_AM_SKIP;
}
#endif /* WITH_QEMU */