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libvirt/tests/nodedevmdevctltest.c
Jonathon Jongsma a9c1febcf4 nodedev: fix xml output for mdev parents in test suite 
Commit 51fbbfdce8 attempted to get the proper nodedev name for the
parent of an defined mdev by traversing the filesystem and looking for a
device that had the appropriate sysfs path.  This works, but it would be
cleaner to to avoid mucking around in the filesystem and instead just
just examine the list of devices we have in memory.

We already had a function nodeDeviceFindAddressByName() which constructs
an address for parent device in a format that can be used with mdevctl.
So if we refactor this function into a a function that simply formats an
address for an arbitrary virNodeDeviceObj*, then we can use this
function as a predicate for our new virNodeDeviceObjListFind() function
from the previous commit. This will search our list of devices for one
whose address matches the address we get from mdevctl.

One nice benefit of this approach is that our test cases will now
display xml output with the proper parent name for mdevs (assuming that
we've added the appropriate mock parent devices to the test driver).
Previously they just displayed 'computer' for the parent because the
alternative would have required specially constructing a mock filesystem
environment with a sysfs that mapped to the appropriate parent.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2021-08-06 15:02:23 -05:00

405 lines
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C
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#include <config.h>
#include "internal.h"
#include "testutils.h"
#include "datatypes.h"
#include "node_device/node_device_driver.h"
#include "vircommand.h"
#define LIBVIRT_VIRCOMMANDPRIV_H_ALLOW
#include "vircommandpriv.h"
#define VIR_FROM_THIS VIR_FROM_NODEDEV
#define VIRT_TYPE "QEMU"
struct TestInfo {
const char *filename;
virMdevctlCommand command;
};
/* capture stdin passed to command */
static void
testCommandDryRunCallback(const char *const*args G_GNUC_UNUSED,
const char *const*env G_GNUC_UNUSED,
const char *input,
char **output G_GNUC_UNUSED,
char **error G_GNUC_UNUSED,
int *status G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
char **stdinbuf = opaque;
*stdinbuf = g_strdup(input);
}
typedef virCommand * (*MdevctlCmdFunc)(virNodeDeviceDef *, char **, char **);
static int
testMdevctlCmd(virMdevctlCommand cmd_type,
const char *mdevxml,
const char *cmdfile,
const char *jsonfile)
{
g_autoptr(virNodeDeviceDef) def = NULL;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
const char *actualCmdline = NULL;
g_autofree char *outbuf = NULL;
g_autofree char *errbuf = NULL;
g_autofree char *stdinbuf = NULL;
g_autoptr(virCommand) cmd = NULL;
g_autoptr(virCommandDryRunToken) dryRunToken = virCommandDryRunTokenNew();
int create;
switch (cmd_type) {
case MDEVCTL_CMD_CREATE:
case MDEVCTL_CMD_DEFINE:
create = CREATE_DEVICE;
break;
case MDEVCTL_CMD_START:
case MDEVCTL_CMD_STOP:
case MDEVCTL_CMD_UNDEFINE:
create = EXISTING_DEVICE;
break;
case MDEVCTL_CMD_LAST:
default:
return -1;
}
if (!(def = virNodeDeviceDefParseFile(mdevxml, create, VIRT_TYPE)))
return -1;
/* this function will set a stdin buffer containing the json configuration
* of the device. The json value is captured in the callback above */
cmd = nodeDeviceGetMdevctlCommand(def, cmd_type, &outbuf, &errbuf);
if (!cmd)
return -1;
if (create)
virCommandSetDryRun(dryRunToken, &buf, true, true,
testCommandDryRunCallback, &stdinbuf);
else
virCommandSetDryRun(dryRunToken, &buf, true, true, NULL, NULL);
if (virCommandRun(cmd, NULL) < 0)
return -1;
if (!(actualCmdline = virBufferCurrentContent(&buf)))
return -1;
if (virTestCompareToFileFull(actualCmdline, cmdfile, false) < 0)
return -1;
if (create && virTestCompareToFile(stdinbuf, jsonfile) < 0)
return -1;
return 0;
}
static int
testMdevctlHelper(const void *data)
{
const struct TestInfo *info = data;
const char *cmd = virMdevctlCommandTypeToString(info->command);
g_autofree char *mdevxml = NULL;
g_autofree char *cmdlinefile = NULL;
g_autofree char *jsonfile = NULL;
mdevxml = g_strdup_printf("%s/nodedevschemadata/%s.xml", abs_srcdir,
info->filename);
cmdlinefile = g_strdup_printf("%s/nodedevmdevctldata/%s-%s.argv",
abs_srcdir, info->filename, cmd);
jsonfile = g_strdup_printf("%s/nodedevmdevctldata/%s-%s.json", abs_srcdir,
info->filename, cmd);
return testMdevctlCmd(info->command, mdevxml, cmdlinefile, jsonfile);
}
static int
testMdevctlListDefined(const void *data G_GNUC_UNUSED)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
const char *actualCmdline = NULL;
int ret = -1;
g_autoptr(virCommand) cmd = NULL;
g_autofree char *output = NULL;
g_autofree char *errmsg = NULL;
g_autofree char *cmdlinefile =
g_strdup_printf("%s/nodedevmdevctldata/mdevctl-list-defined.argv",
abs_srcdir);
g_autoptr(virCommandDryRunToken) dryRunToken = virCommandDryRunTokenNew();
cmd = nodeDeviceGetMdevctlListCommand(true, &output, &errmsg);
if (!cmd)
goto cleanup;
virCommandSetDryRun(dryRunToken, &buf, true, true, NULL, NULL);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
if (!(actualCmdline = virBufferCurrentContent(&buf)))
goto cleanup;
if (virTestCompareToFileFull(actualCmdline, cmdlinefile, false) < 0)
goto cleanup;
ret = 0;
cleanup:
virBufferFreeAndReset(&buf);
return ret;
}
static int
testMdevctlParse(const void *data)
{
g_autofree char *buf = NULL;
const char *filename = data;
g_autofree char *jsonfile = g_strdup_printf("%s/nodedevmdevctldata/%s.json",
abs_srcdir, filename);
g_autofree char *xmloutfile = g_strdup_printf("%s/nodedevmdevctldata/%s.out.xml",
abs_srcdir, filename);
int ret = -1;
int nmdevs = 0;
virNodeDeviceDef **mdevs = NULL;
virBuffer xmloutbuf = VIR_BUFFER_INITIALIZER;
size_t i;
if (virFileReadAll(jsonfile, 1024*1024, &buf) < 0) {
VIR_TEST_DEBUG("Unable to read file %s", jsonfile);
return -1;
}
if ((nmdevs = nodeDeviceParseMdevctlJSON(buf, &mdevs)) < 0) {
VIR_TEST_DEBUG("Unable to parse json for %s", filename);
return -1;
}
for (i = 0; i < nmdevs; i++) {
g_autofree char *devxml = virNodeDeviceDefFormat(mdevs[i]);
if (!devxml)
goto cleanup;
virBufferAddStr(&xmloutbuf, devxml);
}
if (virTestCompareToFileFull(virBufferCurrentContent(&xmloutbuf), xmloutfile, false) < 0)
goto cleanup;
ret = 0;
cleanup:
virBufferFreeAndReset(&xmloutbuf);
for (i = 0; i < nmdevs; i++)
virNodeDeviceDefFree(mdevs[i]);
g_free(mdevs);
return ret;
}
static void
nodedevTestDriverFree(virNodeDeviceDriverState *drv)
{
if (!drv)
return;
virNodeDeviceObjListFree(drv->devs);
virCondDestroy(&drv->initCond);
virMutexDestroy(&drv->lock);
g_free(drv->stateDir);
g_free(drv);
}
/* Add a fake root 'computer' device */
static virNodeDeviceDef *
fakeRootDevice(void)
{
virNodeDeviceDef *def = NULL;
def = g_new0(virNodeDeviceDef, 1);
def->caps = g_new0(virNodeDevCapsDef, 1);
def->name = g_strdup("computer");
return def;
}
/* Add a fake pci device that can be used as a parent device for mediated
* devices. For our purposes, it only needs to have a name that matches the
* parent of the mdev, and it needs a PCI address
*/
static virNodeDeviceDef *
fakePCIDevice(void)
{
virNodeDeviceDef *def = NULL;
virNodeDevCapPCIDev *pci_dev;
def = g_new0(virNodeDeviceDef, 1);
def->caps = g_new0(virNodeDevCapsDef, 1);
def->name = g_strdup("pci_0000_00_02_0");
def->parent = g_strdup("computer");
def->caps->data.type = VIR_NODE_DEV_CAP_PCI_DEV;
pci_dev = &def->caps->data.pci_dev;
pci_dev->domain = 0;
pci_dev->bus = 0;
pci_dev->slot = 2;
pci_dev->function = 0;
return def;
}
/* Add a fake matrix device that can be used as a parent device for mediated
* devices. For our purposes, it only needs to have a name that matches the
* parent of the mdev, and it needs the proper name
*/
static virNodeDeviceDef *
fakeMatrixDevice(void)
{
virNodeDeviceDef *def = NULL;
virNodeDevCapAPMatrix *cap;
def = g_new0(virNodeDeviceDef, 1);
def->caps = g_new0(virNodeDevCapsDef, 1);
def->name = g_strdup("ap_matrix");
def->parent = g_strdup("computer");
def->caps->data.type = VIR_NODE_DEV_CAP_AP_MATRIX;
cap = &def->caps->data.ap_matrix;
cap->addr = g_strdup("matrix");
return def;
}
static int
addDevice(virNodeDeviceDef *def)
{
virNodeDeviceObj *obj;
if (!def)
return -1;
obj = virNodeDeviceObjListAssignDef(driver->devs, def);
if (!obj) {
virNodeDeviceDefFree(def);
return -1;
}
virNodeDeviceObjEndAPI(&obj);
return 0;
}
static int
nodedevTestDriverAddTestDevices(void)
{
if (addDevice(fakeRootDevice()) < 0 ||
addDevice(fakePCIDevice()) < 0 ||
addDevice(fakeMatrixDevice()) < 0)
return -1;
return 0;
}
/* Bare minimum driver init to be able to test nodedev functionality */
static int
nodedevTestDriverInit(void)
{
int ret = -1;
driver = g_new0(virNodeDeviceDriverState, 1);
driver->lockFD = -1;
if (virMutexInit(&driver->lock) < 0 ||
virCondInit(&driver->initCond) < 0) {
VIR_TEST_DEBUG("Unable to initialize test nodedev driver");
goto error;
}
if (!(driver->devs = virNodeDeviceObjListNew()))
goto error;
return 0;
error:
nodedevTestDriverFree(driver);
return ret;
}
static int
mymain(void)
{
int ret = 0;
if (nodedevTestDriverInit() < 0)
return EXIT_FAILURE;
/* add a mock device to the device list so it can be used as a parent
* reference */
if (nodedevTestDriverAddTestDevices() < 0) {
ret = EXIT_FAILURE;
goto done;
}
#define DO_TEST_FULL(desc, func, info) \
if (virTestRun(desc, func, info) < 0) \
ret = -1;
#define DO_TEST_CMD(desc, filename, command) \
do { \
struct TestInfo info = { filename, command }; \
DO_TEST_FULL(desc, testMdevctlHelper, &info); \
} \
while (0)
#define DO_TEST_CREATE(filename) \
DO_TEST_CMD("create mdev " filename, filename, MDEVCTL_CMD_CREATE)
#define DO_TEST_DEFINE(filename) \
DO_TEST_CMD("define mdev " filename, filename, MDEVCTL_CMD_DEFINE)
#define DO_TEST_STOP(filename) \
DO_TEST_CMD("stop mdev " filename, filename, MDEVCTL_CMD_STOP)
#define DO_TEST_UNDEFINE(filename) \
DO_TEST_CMD("undefine mdev" filename, filename, MDEVCTL_CMD_UNDEFINE)
#define DO_TEST_START(filename) \
DO_TEST_CMD("start mdev " filename, filename, MDEVCTL_CMD_START)
#define DO_TEST_LIST_DEFINED() \
DO_TEST_FULL("list defined mdevs", testMdevctlListDefined, NULL)
#define DO_TEST_PARSE_JSON(filename) \
DO_TEST_FULL("parse mdevctl json " filename, testMdevctlParse, filename)
DO_TEST_CREATE("mdev_d069d019_36ea_4111_8f0a_8c9a70e21366");
DO_TEST_CREATE("mdev_fedc4916_1ca8_49ac_b176_871d16c13076");
DO_TEST_CREATE("mdev_d2441d39_495e_4243_ad9f_beb3f14c23d9");
/* Test mdevctl stop command, pass an arbitrary uuid */
DO_TEST_STOP("mdev_d069d019_36ea_4111_8f0a_8c9a70e21366");
DO_TEST_LIST_DEFINED();
DO_TEST_PARSE_JSON("mdevctl-list-empty");
DO_TEST_PARSE_JSON("mdevctl-list-multiple");
DO_TEST_DEFINE("mdev_d069d019_36ea_4111_8f0a_8c9a70e21366");
DO_TEST_DEFINE("mdev_fedc4916_1ca8_49ac_b176_871d16c13076");
DO_TEST_DEFINE("mdev_d2441d39_495e_4243_ad9f_beb3f14c23d9");
DO_TEST_UNDEFINE("mdev_d069d019_36ea_4111_8f0a_8c9a70e21366");
DO_TEST_START("mdev_d069d019_36ea_4111_8f0a_8c9a70e21366");
done:
nodedevTestDriverFree(driver);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN(mymain)
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