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libvirt/tests/qemumonitortestutils.c
Michal Privoznik 5c254bb541 conf: Store SCSI bus length in virDomainDef 
Libvirt assumes that a SCSI bus can fit up to 8 devices
(including controller itself), except for so called wide bus
which can accommodate up to 16 devices (again, including
controller). This plays important role when computing 'drive'
address in virDomainDiskDefAssignAddress(). So far, the only
driver that enables wide SCSI bus is VMX. But with newer
releases, ESX is capable of "super wide" bus (64 devices).

We can blindly bump the limit in our code because then we would
compute address that's invalid for older ESX versions that we
still want to support.

Unfortunately, I haven't found a better place where to store this
than virDomainDef.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2021-08-16 14:22:38 +02:00

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/*
* Copyright (C) 2011-2013 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include <time.h>
#include "testutils.h"
#include "testutilsqemuschema.h"
#include "qemumonitortestutils.h"
#include "virthread.h"
#define LIBVIRT_QEMU_PROCESSPRIV_H_ALLOW
#include "qemu/qemu_processpriv.h"
#include "qemu/qemu_monitor.h"
#include "qemu/qemu_agent.h"
#include "qemu/qemu_qapi.h"
#include "rpc/virnetsocket.h"
#include "viralloc.h"
#include "virlog.h"
#include "virerror.h"
#include "virstring.h"
#include "vireventthread.h"
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("tests.qemumonitortestutils");
struct _qemuMonitorTestItem {
char *identifier;
qemuMonitorTestResponseCallback cb;
void *opaque;
virFreeCallback freecb;
};
struct _qemuMonitorTest {
virMutex lock;
virThread thread;
bool quit;
bool running;
bool started;
bool allowUnusedCommands;
bool skipValidationDeprecated;
bool skipValidationRemoved;
char *incoming;
size_t incomingLength;
size_t incomingCapacity;
char *outgoing;
size_t outgoingLength;
size_t outgoingCapacity;
virNetSocket *server;
virNetSocket *client;
virEventThread *eventThread;
qemuMonitor *mon;
qemuAgent *agent;
char *tmpdir;
size_t nitems;
qemuMonitorTestItem **items;
virDomainObj *vm;
GHashTable *qapischema;
};
static void
qemuMonitorTestItemFree(qemuMonitorTestItem *item)
{
if (!item)
return;
g_free(item->identifier);
if (item->freecb)
(item->freecb)(item->opaque);
g_free(item);
}
/*
* Appends data for a reply to the outgoing buffer
*/
int
qemuMonitorTestAddResponse(qemuMonitorTest *test,
const char *response)
{
size_t want = strlen(response) + 2;
size_t have = test->outgoingCapacity - test->outgoingLength;
VIR_DEBUG("Adding response to monitor command: '%s", response);
if (have < want) {
size_t need = want - have;
VIR_EXPAND_N(test->outgoing, test->outgoingCapacity, need);
}
want -= 2;
memcpy(test->outgoing + test->outgoingLength, response, want);
memcpy(test->outgoing + test->outgoingLength + want, "\r\n", 2);
test->outgoingLength += want + 2;
return 0;
}
static int
qemuMonitorTestAddErrorResponseInternal(qemuMonitorTest *test,
const char *usermsg)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
g_autofree char *escapemsg = NULL;
g_autofree char *jsonmsg = NULL;
char *tmp;
if (!usermsg)
usermsg = "unexpected command";
virBufferEscape(&buf, '\\', "\"", "%s", usermsg);
escapemsg = virBufferContentAndReset(&buf);
/* replace newline/carriage return with space */
tmp = escapemsg;
while (*tmp) {
if (*tmp == '\r' || *tmp == '\n')
*tmp = ' ';
tmp++;
}
/* format the JSON error message */
jsonmsg = g_strdup_printf("{ \"error\": " " { \"desc\": \"%s\", "
" \"class\": \"UnexpectedCommand\" } }", escapemsg);
return qemuMonitorTestAddResponse(test, jsonmsg);
}
int
qemuMonitorTestAddInvalidCommandResponse(qemuMonitorTest *test,
const char *expectedcommand,
const char *actualcommand)
{
g_autofree char *msg = NULL;
msg = g_strdup_printf("expected command '%s' got '%s'", expectedcommand,
actualcommand);
return qemuMonitorTestAddErrorResponseInternal(test, msg);
}
int G_GNUC_PRINTF(2, 3)
qemuMonitorTestAddErrorResponse(qemuMonitorTest *test, const char *errmsg, ...)
{
va_list msgargs;
g_autofree char *msg = NULL;
g_autofree char *jsonmsg = NULL;
int ret = -1;
va_start(msgargs, errmsg);
msg = g_strdup_vprintf(errmsg, msgargs);
jsonmsg = g_strdup_printf("{ \"error\": " " { \"desc\": \"%s\", "
" \"class\": \"UnexpectedCommand\" } }", msg);
ret = qemuMonitorTestAddResponse(test, jsonmsg);
va_end(msgargs);
return ret;
}
static void G_GNUC_NORETURN G_GNUC_PRINTF(1, 2)
qemuMonitorTestError(const char *errmsg,
...)
{
va_list msgargs;
va_start(msgargs, errmsg);
g_fprintf(stderr, "\n");
g_vfprintf(stderr, errmsg, msgargs);
g_fprintf(stderr, "\n");
exit(EXIT_FAILURE); /* exempt from syntax-check */
}
static void G_GNUC_NORETURN
qemuMonitorTestErrorInvalidCommand(const char *expectedcommand,
const char *actualcommand)
{
qemuMonitorTestError("expected command '%s' got '%s'",
expectedcommand, actualcommand);
}
static int
qemuMonitorTestProcessCommand(qemuMonitorTest *test,
const char *cmdstr)
{
int ret;
VIR_DEBUG("Processing string from monitor handler: '%s", cmdstr);
if (test->nitems == 0) {
qemuMonitorTestError("unexpected command: '%s'", cmdstr);
} else {
qemuMonitorTestItem *item = test->items[0];
ret = (item->cb)(test, item, cmdstr);
qemuMonitorTestItemFree(item);
if (VIR_DELETE_ELEMENT(test->items, 0, test->nitems) < 0)
return -1;
}
return ret;
}
/*
* Handles read/write of monitor data on the monitor server side
*/
static void
qemuMonitorTestIO(virNetSocket *sock,
int events,
void *opaque)
{
qemuMonitorTest *test = opaque;
bool err = false;
virMutexLock(&test->lock);
if (test->quit) {
virMutexUnlock(&test->lock);
return;
}
if (events & VIR_EVENT_HANDLE_WRITABLE) {
ssize_t ret;
if ((ret = virNetSocketWrite(sock,
test->outgoing,
test->outgoingLength)) < 0) {
err = true;
goto cleanup;
}
memmove(test->outgoing,
test->outgoing + ret,
test->outgoingLength - ret);
test->outgoingLength -= ret;
if ((test->outgoingCapacity - test->outgoingLength) > 1024)
VIR_SHRINK_N(test->outgoing, test->outgoingCapacity, 1024);
}
if (events & VIR_EVENT_HANDLE_READABLE) {
ssize_t ret, used;
char *t1, *t2;
if ((test->incomingCapacity - test->incomingLength) < 1024) {
VIR_EXPAND_N(test->incoming, test->incomingCapacity, 1024);
}
if ((ret = virNetSocketRead(sock,
test->incoming + test->incomingLength,
(test->incomingCapacity - test->incomingLength) - 1)) < 0) {
err = true;
goto cleanup;
}
test->incomingLength += ret;
test->incoming[test->incomingLength] = '\0';
/* Look to see if we've got a complete line, and
* if so, handle that command
*/
t1 = test->incoming;
while ((t2 = strstr(t1, "\n")) ||
(test->agent && (t2 = strstr(t1, "\r")))) {
*t2 = '\0';
if (qemuMonitorTestProcessCommand(test, t1) < 0) {
err = true;
goto cleanup;
}
t1 = t2 + 1;
}
used = t1 - test->incoming;
memmove(test->incoming, t1, test->incomingLength - used);
test->incomingLength -= used;
if ((test->incomingCapacity - test->incomingLength) > 1024) {
VIR_SHRINK_N(test->incoming,
test->incomingCapacity,
1024);
}
}
if (events & (VIR_EVENT_HANDLE_HANGUP |
VIR_EVENT_HANDLE_ERROR))
err = true;
cleanup:
if (err) {
virNetSocketRemoveIOCallback(sock);
virNetSocketClose(sock);
virObjectUnref(test->client);
test->client = NULL;
} else {
events = VIR_EVENT_HANDLE_READABLE;
if (test->outgoingLength)
events |= VIR_EVENT_HANDLE_WRITABLE;
virNetSocketUpdateIOCallback(sock, events);
}
virMutexUnlock(&test->lock);
}
static void
qemuMonitorTestWorker(void *opaque)
{
qemuMonitorTest *test = opaque;
virMutexLock(&test->lock);
while (!test->quit) {
virMutexUnlock(&test->lock);
if (virEventRunDefaultImpl() < 0) {
virMutexLock(&test->lock);
test->quit = true;
break;
}
virMutexLock(&test->lock);
}
test->running = false;
virMutexUnlock(&test->lock);
return;
}
static void
qemuMonitorTestFreeTimer(int timer G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
/* nothing to be done here */
}
void
qemuMonitorTestFree(qemuMonitorTest *test)
{
size_t i;
int timer = -1;
if (!test)
return;
virMutexLock(&test->lock);
if (test->running) {
test->quit = true;
/* HACK: Add a dummy timeout to break event loop */
timer = virEventAddTimeout(0, qemuMonitorTestFreeTimer, NULL, NULL);
}
virMutexUnlock(&test->lock);
if (test->client) {
virNetSocketRemoveIOCallback(test->client);
virNetSocketClose(test->client);
virObjectUnref(test->client);
}
virObjectUnref(test->server);
if (test->mon) {
virObjectUnlock(test->mon);
qemuMonitorClose(test->mon);
}
if (test->agent) {
virObjectUnlock(test->agent);
qemuAgentClose(test->agent);
}
g_object_unref(test->eventThread);
virObjectUnref(test->vm);
if (test->started)
virThreadJoin(&test->thread);
if (timer != -1)
virEventRemoveTimeout(timer);
g_free(test->incoming);
g_free(test->outgoing);
for (i = 0; i < test->nitems; i++) {
if (!test->allowUnusedCommands) {
g_fprintf(stderr,
"\nunused test monitor item '%s'",
NULLSTR(test->items[i]->identifier));
}
qemuMonitorTestItemFree(test->items[i]);
}
g_free(test->items);
if (test->tmpdir && rmdir(test->tmpdir) < 0)
VIR_WARN("Failed to remove tempdir: %s", g_strerror(errno));
g_free(test->tmpdir);
if (!test->allowUnusedCommands &&
test->nitems != 0) {
qemuMonitorTestError("unused test monitor items are not allowed for this test\n");
}
virMutexDestroy(&test->lock);
g_free(test);
}
int
qemuMonitorTestAddHandler(qemuMonitorTest *test,
const char *identifier,
qemuMonitorTestResponseCallback cb,
void *opaque,
virFreeCallback freecb)
{
qemuMonitorTestItem *item;
item = g_new0(qemuMonitorTestItem, 1);
item->identifier = g_strdup(identifier);
item->cb = cb;
item->freecb = freecb;
item->opaque = opaque;
virMutexLock(&test->lock);
VIR_APPEND_ELEMENT(test->items, test->nitems, item);
virMutexUnlock(&test->lock);
return 0;
}
void *
qemuMonitorTestItemGetPrivateData(qemuMonitorTestItem *item)
{
return item ? item->opaque : NULL;
}
typedef struct _qemuMonitorTestCommandArgs qemuMonitorTestCommandArgs;
struct _qemuMonitorTestCommandArgs {
char *argname;
char *argval;
};
struct qemuMonitorTestHandlerData {
char *command_name;
char *cmderr;
char *response;
size_t nargs;
qemuMonitorTestCommandArgs *args;
char *expectArgs;
};
static void
qemuMonitorTestHandlerDataFree(void *opaque)
{
struct qemuMonitorTestHandlerData *data = opaque;
size_t i;
if (!data)
return;
for (i = 0; i < data->nargs; i++) {
g_free(data->args[i].argname);
g_free(data->args[i].argval);
}
g_free(data->command_name);
g_free(data->cmderr);
g_free(data->response);
g_free(data->args);
g_free(data->expectArgs);
g_free(data);
}
/* Returns -1 on error, 0 if validation was successful/not necessary */
static int
qemuMonitorTestProcessCommandDefaultValidate(qemuMonitorTest *test,
const char *cmdname,
virJSONValue *args)
{
g_auto(virBuffer) debug = VIR_BUFFER_INITIALIZER;
if (!test->qapischema)
return 0;
if (test->agent) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
"Command validation testing is not "
"implemented for the guest agent");
return -1;
}
/* 'device_add' needs to be skipped as it does not have fully defined schema */
if (STREQ(cmdname, "device_add"))
return 0;
if (testQEMUSchemaValidateCommand(cmdname, args, test->qapischema,
test->skipValidationDeprecated,
test->skipValidationRemoved,
&debug) < 0) {
if (virTestGetDebug() == 2) {
g_autofree char *argstr = NULL;
if (args)
argstr = virJSONValueToString(args, true);
fprintf(stderr,
"\nfailed to validate arguments of '%s' against QAPI schema\n"
"args:\n%s\nvalidator output:\n %s\n",
cmdname, NULLSTR(argstr), virBufferCurrentContent(&debug));
}
qemuMonitorTestError("failed to validate arguments of '%s' "
"against QAPI schema "
"(to see debug output use VIR_TEST_DEBUG=2)",
cmdname);
return -1;
}
return 0;
}
static int
qemuMonitorTestProcessCommandDefault(qemuMonitorTest *test,
qemuMonitorTestItem *item,
const char *cmdstr)
{
struct qemuMonitorTestHandlerData *data = item->opaque;
g_autoptr(virJSONValue) val = NULL;
virJSONValue *cmdargs = NULL;
const char *cmdname;
if (!(val = virJSONValueFromString(cmdstr)))
return -1;
if (!(cmdname = virJSONValueObjectGetString(val, "execute"))) {
qemuMonitorTestError("Missing command name in %s", cmdstr);
return -1;
}
cmdargs = virJSONValueObjectGet(val, "arguments");
if (qemuMonitorTestProcessCommandDefaultValidate(test, cmdname, cmdargs) < 0)
return -1;
if (data->command_name && STRNEQ(data->command_name, cmdname)) {
qemuMonitorTestErrorInvalidCommand(data->command_name, cmdname);
return -1;
} else {
return qemuMonitorTestAddResponse(test, data->response);
}
}
int
qemuMonitorTestAddItem(qemuMonitorTest *test,
const char *command_name,
const char *response)
{
struct qemuMonitorTestHandlerData *data;
data = g_new0(struct qemuMonitorTestHandlerData, 1);
data->command_name = g_strdup(command_name);
data->response = g_strdup(response);
return qemuMonitorTestAddHandler(test,
command_name,
qemuMonitorTestProcessCommandDefault,
data, qemuMonitorTestHandlerDataFree);
}
static int
qemuMonitorTestProcessCommandVerbatim(qemuMonitorTest *test,
qemuMonitorTestItem *item,
const char *cmdstr)
{
struct qemuMonitorTestHandlerData *data = item->opaque;
g_autofree char *reformatted = NULL;
g_autoptr(virJSONValue) json = NULL;
virJSONValue *cmdargs;
const char *cmdname;
int ret = -1;
/* JSON strings will be reformatted to simplify checking */
if (!(json = virJSONValueFromString(cmdstr)) ||
!(reformatted = virJSONValueToString(json, false)))
return -1;
cmdstr = reformatted;
/* in this case we do a best-effort schema check if we can find the command */
if ((cmdname = virJSONValueObjectGetString(json, "execute"))) {
cmdargs = virJSONValueObjectGet(json, "arguments");
if (qemuMonitorTestProcessCommandDefaultValidate(test, cmdname, cmdargs) < 0)
return -1;
}
if (STREQ(data->command_name, cmdstr)) {
ret = qemuMonitorTestAddResponse(test, data->response);
} else {
if (data->cmderr) {
qemuMonitorTestError("%s: %s", data->cmderr, cmdstr);
} else {
qemuMonitorTestErrorInvalidCommand(data->command_name, cmdstr);
}
}
return ret;
}
/**
* qemuMonitorTestAddItemVerbatim:
* @test: monitor test object
* @command: full expected command syntax
* @cmderr: possible explanation of expected command (may be NULL)
* @response: full reply of @command
*
* Adds a test command for the simulated monitor. The full syntax is checked
* as specified in @command. For JSON monitor tests formatting/whitespace is
* ignored. If the command on the monitor is not as expected an error containing
* @cmderr is returned. Otherwise @response is put as-is on the monitor.
*
* Returns 0 when command was successfully added, -1 on error.
*/
int
qemuMonitorTestAddItemVerbatim(qemuMonitorTest *test,
const char *command,
const char *cmderr,
const char *response)
{
struct qemuMonitorTestHandlerData *data;
data = g_new0(struct qemuMonitorTestHandlerData, 1);
data->response = g_strdup(response);
data->cmderr = g_strdup(cmderr);
data->command_name = virJSONStringReformat(command, false);
if (!data->command_name)
goto error;
return qemuMonitorTestAddHandler(test,
command,
qemuMonitorTestProcessCommandVerbatim,
data, qemuMonitorTestHandlerDataFree);
error:
qemuMonitorTestHandlerDataFree(data);
return -1;
}
static int
qemuMonitorTestProcessGuestAgentSync(qemuMonitorTest *test,
qemuMonitorTestItem *item G_GNUC_UNUSED,
const char *cmdstr)
{
g_autoptr(virJSONValue) val = NULL;
virJSONValue *args;
unsigned long long id;
const char *cmdname;
g_autofree char *retmsg = NULL;
int ret = -1;
if (!(val = virJSONValueFromString(cmdstr)))
return -1;
if (!(cmdname = virJSONValueObjectGetString(val, "execute"))) {
ret = qemuMonitorTestAddErrorResponse(test, "Missing guest-sync command name");
goto cleanup;
}
if (STRNEQ(cmdname, "guest-sync")) {
ret = qemuMonitorTestAddInvalidCommandResponse(test, "guest-sync", cmdname);
goto cleanup;
}
if (!(args = virJSONValueObjectGet(val, "arguments"))) {
ret = qemuMonitorTestAddErrorResponse(test, "Missing arguments for guest-sync");
goto cleanup;
}
if (virJSONValueObjectGetNumberUlong(args, "id", &id)) {
ret = qemuMonitorTestAddErrorResponse(test, "Missing id for guest sync");
goto cleanup;
}
retmsg = g_strdup_printf("{\"return\":%llu}", id);
ret = qemuMonitorTestAddResponse(test, retmsg);
cleanup:
return ret;
}
int
qemuMonitorTestAddAgentSyncResponse(qemuMonitorTest *test)
{
if (!test->agent) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
"This test is not an agent test");
return -1;
}
return qemuMonitorTestAddHandler(test,
"agent-sync",
qemuMonitorTestProcessGuestAgentSync,
NULL, NULL);
}
static int
qemuMonitorTestProcessCommandWithArgs(qemuMonitorTest *test,
qemuMonitorTestItem *item,
const char *cmdstr)
{
struct qemuMonitorTestHandlerData *data = item->opaque;
g_autoptr(virJSONValue) val = NULL;
virJSONValue *args;
virJSONValue *argobj;
const char *cmdname;
size_t i;
if (!(val = virJSONValueFromString(cmdstr)))
return -1;
if (!(cmdname = virJSONValueObjectGetString(val, "execute"))) {
qemuMonitorTestError("Missing command name in %s", cmdstr);
return -1;
}
if (data->command_name &&
STRNEQ(data->command_name, cmdname)) {
qemuMonitorTestErrorInvalidCommand(data->command_name, cmdname);
return -1;
}
if (!(args = virJSONValueObjectGet(val, "arguments"))) {
qemuMonitorTestError("Missing arguments section for command '%s'",
NULLSTR(data->command_name));
return -1;
}
/* validate the args */
for (i = 0; i < data->nargs; i++) {
qemuMonitorTestCommandArgs *arg = &data->args[i];
g_autofree char *argstr = NULL;
if (!(argobj = virJSONValueObjectGet(args, arg->argname))) {
qemuMonitorTestError("Missing argument '%s' for command '%s'",
arg->argname,
NULLSTR(data->command_name));
return -1;
}
/* convert the argument to string */
if (!(argstr = virJSONValueToString(argobj, false)))
return -1;
/* verify that the argument value is expected */
if (STRNEQ(argstr, arg->argval)) {
qemuMonitorTestError("Invalid value of argument '%s' of command '%s': "
"expected '%s' got '%s'",
arg->argname,
NULLSTR(data->command_name),
arg->argval, argstr);
return -1;
}
}
/* arguments checked out, return the response */
return qemuMonitorTestAddResponse(test, data->response);
}
/* this allows to add a responder that is able to check
* a (shallow) structure of arguments for a command */
int
qemuMonitorTestAddItemParams(qemuMonitorTest *test,
const char *cmdname,
const char *response,
...)
{
struct qemuMonitorTestHandlerData *data;
const char *argname;
const char *argval;
va_list args;
va_start(args, response);
data = g_new0(struct qemuMonitorTestHandlerData, 1);
data->command_name = g_strdup(cmdname);
data->response = g_strdup(response);
while ((argname = va_arg(args, char *))) {
size_t i;
if (!(argval = va_arg(args, char *))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"Missing argument value for argument '%s'",
argname);
goto error;
}
i = data->nargs;
VIR_EXPAND_N(data->args, data->nargs, 1);
data->args[i].argname = g_strdup(argname);
data->args[i].argval = g_strdup(argval);
}
va_end(args);
return qemuMonitorTestAddHandler(test,
cmdname,
qemuMonitorTestProcessCommandWithArgs,
data, qemuMonitorTestHandlerDataFree);
error:
va_end(args);
qemuMonitorTestHandlerDataFree(data);
return -1;
}
static int
qemuMonitorTestProcessCommandWithArgStr(qemuMonitorTest *test,
qemuMonitorTestItem *item,
const char *cmdstr)
{
struct qemuMonitorTestHandlerData *data = item->opaque;
g_autoptr(virJSONValue) val = NULL;
virJSONValue *args;
g_autofree char *argstr = NULL;
const char *cmdname;
if (!(val = virJSONValueFromString(cmdstr)))
return -1;
if (!(cmdname = virJSONValueObjectGetString(val, "execute"))) {
qemuMonitorTestError("Missing command name in %s", cmdstr);
return -1;
}
if (STRNEQ(data->command_name, cmdname)) {
qemuMonitorTestErrorInvalidCommand(data->command_name, cmdname);
return -1;
}
if (!(args = virJSONValueObjectGet(val, "arguments"))) {
qemuMonitorTestError("Missing arguments section for command '%s'",
data->command_name);
return -1;
}
/* convert the arguments to string */
if (!(argstr = virJSONValueToString(args, false)))
return -1;
/* verify that the argument value is expected */
if (STRNEQ(argstr, data->expectArgs)) {
qemuMonitorTestError("%s: expected arguments: '%s', got: '%s'",
data->command_name,
data->expectArgs, argstr);
return -1;
}
/* arguments checked out, return the response */
return qemuMonitorTestAddResponse(test, data->response);
}
/**
* qemuMonitorTestAddItemExpect:
*
* @test: test monitor object
* @cmdname: command name
* @cmdargs: expected arguments of the command
* @apostrophe: convert apostrophes (') in @cmdargs to quotes (")
* @response: simulated response of the command
*
* Simulates a qemu monitor command. Checks that the 'arguments' of the qmp
* command are expected. If @apostrophe is true apostrophes are converted to
* quotes for simplification of writing the strings into code.
*/
int
qemuMonitorTestAddItemExpect(qemuMonitorTest *test,
const char *cmdname,
const char *cmdargs,
bool apostrophe,
const char *response)
{
struct qemuMonitorTestHandlerData *data;
data = g_new0(struct qemuMonitorTestHandlerData, 1);
data->command_name = g_strdup(cmdname);
data->response = g_strdup(response);
data->expectArgs = g_strdup(cmdargs);
if (apostrophe) {
char *tmp = data->expectArgs;
while (*tmp != '\0') {
if (*tmp == '\'')
*tmp = '"';
tmp++;
}
}
return qemuMonitorTestAddHandler(test,
cmdname,
qemuMonitorTestProcessCommandWithArgStr,
data, qemuMonitorTestHandlerDataFree);
}
static void
qemuMonitorTestEOFNotify(qemuMonitor *mon G_GNUC_UNUSED,
virDomainObj *vm G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
}
static void
qemuMonitorTestErrorNotify(qemuMonitor *mon G_GNUC_UNUSED,
virDomainObj *vm G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
}
static qemuMonitorCallbacks qemuMonitorTestCallbacks = {
.eofNotify = qemuMonitorTestEOFNotify,
.errorNotify = qemuMonitorTestErrorNotify,
.domainDeviceDeleted = qemuProcessHandleDeviceDeleted,
};
static void
qemuMonitorTestAgentNotify(qemuAgent *agent G_GNUC_UNUSED,
virDomainObj *vm G_GNUC_UNUSED)
{
}
static qemuAgentCallbacks qemuMonitorTestAgentCallbacks = {
.eofNotify = qemuMonitorTestAgentNotify,
.errorNotify = qemuMonitorTestAgentNotify,
};
static qemuMonitorTest *
qemuMonitorCommonTestNew(virDomainXMLOption *xmlopt,
virDomainObj *vm,
virDomainChrSourceDef *src)
{
qemuMonitorTest *test = NULL;
char *path = NULL;
char *tmpdir_template = NULL;
test = g_new0(qemuMonitorTest, 1);
if (virMutexInit(&test->lock) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
"Cannot initialize mutex");
VIR_FREE(test);
return NULL;
}
tmpdir_template = g_strdup("/tmp/libvirt_XXXXXX");
if (!(test->tmpdir = g_mkdtemp(tmpdir_template))) {
virReportSystemError(errno, "%s",
"Failed to create temporary directory");
goto error;
}
tmpdir_template = NULL;
path = g_strdup_printf("%s/qemumonitorjsontest.sock", test->tmpdir);
if (vm) {
test->vm = virObjectRef(vm);
} else {
test->vm = virDomainObjNew(xmlopt);
if (!test->vm)
goto error;
if (!(test->vm->def = virDomainDefNew(xmlopt)))
goto error;
}
if (virNetSocketNewListenUNIX(path, 0700, geteuid(), getegid(),
&test->server) < 0)
goto error;
memset(src, 0, sizeof(*src));
src->type = VIR_DOMAIN_CHR_TYPE_UNIX;
src->data.nix.path = (char *)path;
src->data.nix.listen = false;
path = NULL;
if (virNetSocketListen(test->server, 1) < 0)
goto error;
return test;
error:
VIR_FREE(path);
VIR_FREE(tmpdir_template);
qemuMonitorTestFree(test);
return NULL;
}
static int
qemuMonitorCommonTestInit(qemuMonitorTest *test)
{
int events = VIR_EVENT_HANDLE_READABLE;
if (!test)
return -1;
if (virNetSocketAccept(test->server, &test->client) < 0)
return -1;
if (!test->client)
return -1;
if (test->outgoingLength > 0)
events = VIR_EVENT_HANDLE_WRITABLE;
if (virNetSocketAddIOCallback(test->client,
events,
qemuMonitorTestIO,
test,
NULL) < 0)
return -1;
virMutexLock(&test->lock);
if (virThreadCreate(&test->thread,
true,
qemuMonitorTestWorker,
test) < 0) {
virMutexUnlock(&test->lock);
return -1;
}
test->started = test->running = true;
virMutexUnlock(&test->lock);
return 0;
}
#define QEMU_JSON_GREETING "{\"QMP\":"\
" {\"version\":"\
" {\"qemu\":"\
" {\"micro\": 1,"\
" \"minor\": 0,"\
" \"major\": 1"\
" },"\
" \"package\": \"(qemu-kvm-1.0.1)"\
" \"},"\
" \"capabilities\": []"\
" }"\
"}"
/* We skip the normal handshake reply of "{\"execute\":\"qmp_capabilities\"}" */
qemuMonitorTest *
qemuMonitorTestNew(virDomainXMLOption *xmlopt,
virDomainObj *vm,
virQEMUDriver *driver,
const char *greeting,
GHashTable *schema)
{
qemuMonitorTest *test = NULL;
virDomainChrSourceDef src;
memset(&src, 0, sizeof(src));
if (!(test = qemuMonitorCommonTestNew(xmlopt, vm, &src)))
goto error;
if (!(test->eventThread = virEventThreadNew("mon-test")))
goto error;
test->qapischema = schema;
if (!(test->mon = qemuMonitorOpen(test->vm,
&src,
true,
0,
virEventThreadGetContext(test->eventThread),
&qemuMonitorTestCallbacks,
driver)))
goto error;
virObjectLock(test->mon);
if (!greeting)
greeting = QEMU_JSON_GREETING;
if (qemuMonitorTestAddResponse(test, greeting) < 0)
goto error;
if (qemuMonitorCommonTestInit(test) < 0)
goto error;
virDomainChrSourceDefClear(&src);
return test;
error:
virDomainChrSourceDefClear(&src);
qemuMonitorTestFree(test);
return NULL;
}
/**
* qemuMonitorTestNewFromFile:
* @fileName: File name to load monitor replies from
* @xmlopt: XML parser configuration object
* @simple: see below
*
* Create a JSON test monitor simulator object and fill it with replies
* specified in @fileName. The file contains JSON reply objects separated by
* empty lines. If @simple is true a generic QMP greeting is automatically
* added as the first reply, otherwise the first entry in the file is used.
*
* Returns the monitor object on success; NULL on error.
*/
qemuMonitorTest *
qemuMonitorTestNewFromFile(const char *fileName,
virDomainXMLOption *xmlopt,
bool simple)
{
qemuMonitorTest *test = NULL;
g_autofree char *json = NULL;
char *tmp;
char *singleReply;
if (virTestLoadFile(fileName, &json) < 0)
goto cleanup;
if (simple && !(test = qemuMonitorTestNewSimple(xmlopt)))
goto cleanup;
/* Our JSON parser expects replies to be separated by a newline character.
* Hence we must preprocess the file a bit. */
tmp = singleReply = json;
while ((tmp = strchr(tmp, '\n'))) {
/* It is safe to touch tmp[1] since all strings ends with '\0'. */
bool eof = !tmp[1];
if (*(tmp + 1) != '\n') {
*tmp = ' ';
tmp++;
} else {
/* Cut off a single reply. */
*(tmp + 1) = '\0';
if (test) {
if (qemuMonitorTestAddItem(test, NULL, singleReply) < 0)
goto error;
} else {
/* Create new mocked monitor with our greeting */
if (!(test = qemuMonitorTestNew(xmlopt, NULL, NULL,
singleReply, NULL)))
goto error;
}
if (!eof) {
/* Move the @tmp and @singleReply. */
tmp += 2;
singleReply = tmp;
}
}
if (eof)
break;
}
if (test && qemuMonitorTestAddItem(test, NULL, singleReply) < 0)
goto error;
cleanup:
return test;
error:
qemuMonitorTestFree(test);
test = NULL;
goto cleanup;
}
/**
* qemuMonitorTestAllowUnusedCommands:
* @test: test monitor object
*
* By default all test items/commands must be used by the test. This function
* allows to override the requirement for individual tests e.g. if it's necessary
* to test some negative scenarios which would not use all commands.
*/
void
qemuMonitorTestAllowUnusedCommands(qemuMonitorTest *test)
{
test->allowUnusedCommands = true;
}
/**
* qemuMonitorTestSkipDeprecatedValidation:
* @test: test monitor object
* @allowRemoved: don't produce errors if command was removed from QMP schema
*
* By default if the QMP schema is provided all test items/commands are
* validated against the schema. This function allows to override the validation
* and additionally if @allowRemoved is true and if such a command is no longer
* present in the QMP, only a warning is printed.
*
* '@allowRemoved' must be used only if a suitable replacement is already in
* use and the code tests legacy interactions.
*
* Note that currently '@allowRemoved' influences only removed commands. If an
* argument is removed it will still fail validation.
*/
void
qemuMonitorTestSkipDeprecatedValidation(qemuMonitorTest *test,
bool allowRemoved)
{
test->skipValidationDeprecated = true;
test->skipValidationRemoved = allowRemoved;
}
static int
qemuMonitorTestFullAddItem(qemuMonitorTest *test,
const char *filename,
const char *command,
const char *response,
size_t line)
{
g_autofree char *cmderr = NULL;
int ret;
cmderr = g_strdup_printf("wrong expected command in %s:%zu: ", filename, line);
ret = qemuMonitorTestAddItemVerbatim(test, command, cmderr, response);
return ret;
}
/**
* qemuMonitorTestNewFromFileFull:
* @fileName: File name to load monitor replies from
* @driver: qemu driver object
* @vm: domain object (may be null if it's not needed by the test)
* @qmpschema: QMP schema data hash table if QMP checking is required
*
* Create a JSON test monitor simulator object and fill it with expected command
* sequence and replies specified in @fileName.
*
* The file contains a sequence of JSON commands and reply objects separated by
* empty lines. A command is followed by a reply. The QMP greeting is added
* automatically.
*
* Returns the monitor object on success; NULL on error.
*/
qemuMonitorTest *
qemuMonitorTestNewFromFileFull(const char *fileName,
virQEMUDriver *driver,
virDomainObj *vm,
GHashTable *qmpschema)
{
qemuMonitorTest *ret = NULL;
g_autofree char *jsonstr = NULL;
char *tmp;
size_t line = 0;
char *command = NULL;
char *response = NULL;
size_t commandln = 0;
if (virTestLoadFile(fileName, &jsonstr) < 0)
return NULL;
if (!(ret = qemuMonitorTestNew(driver->xmlopt, vm, driver, NULL,
qmpschema)))
goto cleanup;
tmp = jsonstr;
command = tmp;
while ((tmp = strchr(tmp, '\n'))) {
line++;
/* eof */
if (!tmp[1])
break;
/* concatenate block which was broken up for readability */
if (*(tmp + 1) != '\n') {
*tmp = ' ';
tmp++;
continue;
}
/* Cut off a single reply. */
*(tmp + 1) = '\0';
if (response) {
if (qemuMonitorTestFullAddItem(ret, fileName, command,
response, commandln) < 0)
goto error;
command = NULL;
response = NULL;
}
/* Move the @tmp and @singleReply. */
tmp += 2;
if (!command) {
commandln = line;
command = tmp;
} else {
response = tmp;
}
}
if (command) {
if (!response) {
virReportError(VIR_ERR_INTERNAL_ERROR, "missing response for command "
"on line '%zu' in '%s'", commandln, fileName);
goto error;
}
if (qemuMonitorTestFullAddItem(ret, fileName, command,
response, commandln) < 0)
goto error;
}
cleanup:
return ret;
error:
qemuMonitorTestFree(ret);
ret = NULL;
goto cleanup;
}
qemuMonitorTest *
qemuMonitorTestNewAgent(virDomainXMLOption *xmlopt)
{
qemuMonitorTest *test = NULL;
virDomainChrSourceDef src;
memset(&src, 0, sizeof(src));
if (!(test = qemuMonitorCommonTestNew(xmlopt, NULL, &src)))
goto error;
if (!(test->eventThread = virEventThreadNew("agent-test")))
goto error;
if (!(test->agent = qemuAgentOpen(test->vm,
&src,
virEventThreadGetContext(test->eventThread),
&qemuMonitorTestAgentCallbacks,
false)))
goto error;
virObjectLock(test->agent);
if (qemuMonitorCommonTestInit(test) < 0)
goto error;
virDomainChrSourceDefClear(&src);
return test;
error:
virDomainChrSourceDefClear(&src);
qemuMonitorTestFree(test);
return NULL;
}
qemuMonitor *
qemuMonitorTestGetMonitor(qemuMonitorTest *test)
{
return test->mon;
}
qemuAgent *
qemuMonitorTestGetAgent(qemuMonitorTest *test)
{
return test->agent;
}
virDomainObj *
qemuMonitorTestGetDomainObj(qemuMonitorTest *test)
{
return test->vm;
}
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