qemumonitortestutils.c 14.4 KB
Newer Older
1
/*
2
 * Copyright (C) 2011-2013 Red Hat, Inc.
3 4 5 6 7 8 9 10 11 12 13 14
 *
 * 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
15
 * License along with this library.  If not, see
16 17 18 19 20 21 22 23 24 25 26 27 28
 * <http://www.gnu.org/licenses/>.
 *
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "qemumonitortestutils.h"

29
#include "virthread.h"
30 31
#include "qemu/qemu_monitor.h"
#include "rpc/virnetsocket.h"
32
#include "viralloc.h"
33
#include "virutil.h"
34
#include "virlog.h"
35
#include "virerror.h"
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

#define VIR_FROM_THIS VIR_FROM_NONE

typedef struct _qemuMonitorTestItem qemuMonitorTestItem;
typedef qemuMonitorTestItem *qemuMonitorTestItemPtr;

struct _qemuMonitorTestItem {
    char *command_name;
    char *response;
};

struct _qemuMonitorTest {
    virMutex lock;
    virThread thread;

    bool json;
    bool quit;
    bool running;

    char *incoming;
    size_t incomingLength;
    size_t incomingCapacity;

    char *outgoing;
    size_t outgoingLength;
    size_t outgoingCapacity;

    virNetSocketPtr server;
    virNetSocketPtr client;

    qemuMonitorPtr mon;

68 69
    char *tmpdir;

70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
    size_t nitems;
    qemuMonitorTestItemPtr *items;

    virDomainObjPtr vm;
};


static void qemuMonitorTestItemFree(qemuMonitorTestItemPtr item);

/*
 * Appends data for a reply onto the outgoing buffer
 */
static int qemuMonitorTestAddReponse(qemuMonitorTestPtr test,
                                     const char *response)
{
    size_t want = strlen(response) + 2;
    size_t have = test->outgoingCapacity - test->outgoingLength;

    if (have < want) {
        size_t need = want - have;
        if (VIR_EXPAND_N(test->outgoing, test->outgoingCapacity, need) < 0) {
            virReportOOMError();
            return -1;
        }
    }

    want -= 2;
    memcpy(test->outgoing + test->outgoingLength,
           response,
           want);
    memcpy(test->outgoing + test->outgoingLength + want,
           "\r\n",
           2);
    test->outgoingLength += want + 2;
    return 0;
}


/*
 * Processes a single line, looking for a matching expected
 * item to reply with, else replies with an error
 */
static int qemuMonitorTestProcessCommandJSON(qemuMonitorTestPtr test,
                                             const char *cmdstr)
{
    virJSONValuePtr val;
    const char *cmdname;
    int ret = -1;

    if (!(val = virJSONValueFromString(cmdstr)))
        return -1;

    if (!(cmdname = virJSONValueObjectGetString(val, "execute"))) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       "Missing command name in %s", cmdstr);
        goto cleanup;
    }

    if (test->nitems == 0 ||
        STRNEQ(test->items[0]->command_name, cmdname)) {
        ret = qemuMonitorTestAddReponse(test,
                                        "{ \"error\": "
                                        " { \"desc\": \"Unexpected command\", "
                                        "   \"class\": \"UnexpectedCommand\" } }");
    } else {
        ret = qemuMonitorTestAddReponse(test,
                                        test->items[0]->response);
        qemuMonitorTestItemFree(test->items[0]);
        if (test->nitems == 1) {
            VIR_FREE(test->items);
            test->nitems = 0;
        } else {
            memmove(test->items,
                    test->items + 1,
                    sizeof(test->items[0]) * (test->nitems - 1));
            VIR_SHRINK_N(test->items, test->nitems, 1);
        }
    }

cleanup:
    virJSONValueFree(val);
    return ret;
}


static int qemuMonitorTestProcessCommandText(qemuMonitorTestPtr test,
                                             const char *cmdstr)
{
    char *tmp;
    char *cmdname;
    int ret = -1;

    if (!(cmdname = strdup(cmdstr))) {
        virReportOOMError();
        return -1;
    }
    if (!(tmp = strchr(cmdname, ' '))) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       "Cannot find command name in '%s'", cmdstr);
        goto cleanup;
    }
    *tmp = '\0';

    if (test->nitems == 0 ||
        STRNEQ(test->items[0]->command_name, cmdname)) {
        ret = qemuMonitorTestAddReponse(test,
                                        "unexpected command");
    } else {
        ret = qemuMonitorTestAddReponse(test,
                                        test->items[0]->response);
        qemuMonitorTestItemFree(test->items[0]);
        if (test->nitems == 1) {
            VIR_FREE(test->items);
            test->nitems = 0;
        } else {
            memmove(test->items,
                    test->items + 1,
                    sizeof(test->items[0]) * (test->nitems - 1));
            VIR_SHRINK_N(test->items, test->nitems, 1);
        }
    }

cleanup:
    VIR_FREE(cmdname);
    return ret;
}

static int qemuMonitorTestProcessCommand(qemuMonitorTestPtr test,
                                         const char *cmdstr)
{
    if (test->json)
        return qemuMonitorTestProcessCommandJSON(test ,cmdstr);
    else
        return qemuMonitorTestProcessCommandText(test ,cmdstr);
}

/*
 * Handles read/write of monitor data on the monitor server side
 */
static void qemuMonitorTestIO(virNetSocketPtr sock,
                              int events,
                              void *opaque)
{
    qemuMonitorTestPtr test = opaque;
    bool err = false;

    virMutexLock(&test->lock);
217 218 219 220
    if (test->quit) {
        virMutexUnlock(&test->lock);
        return;
    }
221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
    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) {
            if (VIR_EXPAND_N(test->incoming, test->incomingCapacity, 1024) < 0) {
                err = true;
                goto cleanup;
            }
        }

        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, "\r\n"))) {
            *t2 = '\0';

            if (qemuMonitorTestProcessCommand(test, t1) < 0) {
                err = true;
                goto cleanup;
            }

            t1 = t2 + 2;
        }
        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)
{
    qemuMonitorTestPtr test = opaque;

    virMutexLock(&test->lock);

    while (!test->quit) {
        virMutexUnlock(&test->lock);

        if (virEventRunDefaultImpl() < 0) {
315
            virMutexLock(&test->lock);
316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
            test->quit = true;
            break;
        }

        virMutexLock(&test->lock);
    }

    test->running = false;

    virMutexUnlock(&test->lock);
    return;
}

static void qemuMonitorTestItemFree(qemuMonitorTestItemPtr item)
{
    if (!item)
        return;

    VIR_FREE(item->command_name);
    VIR_FREE(item->response);

    VIR_FREE(item);
}


341 342 343 344 345 346 347
static void
qemuMonitorTestFreeTimer(int timer ATTRIBUTE_UNUSED, void *opaque ATTRIBUTE_UNUSED)
{
    /* nothing to be done here */
}


348 349 350
void qemuMonitorTestFree(qemuMonitorTestPtr test)
{
    size_t i;
351
    int timer = -1;
352 353 354 355 356 357 358

    if (!test)
        return;

    virMutexLock(&test->lock);
    if (test->running) {
        test->quit = true;
359 360
        /* HACK: Add a dummy timeout to break event loop */
        timer = virEventAddTimeout(0, qemuMonitorTestFreeTimer, NULL, NULL);
361 362 363 364 365 366 367 368 369 370 371
    }
    virMutexUnlock(&test->lock);

    if (test->client) {
        virNetSocketRemoveIOCallback(test->client);
        virNetSocketClose(test->client);
        virObjectUnref(test->client);
    }

    virObjectUnref(test->server);
    if (test->mon) {
372
        virObjectUnlock(test->mon);
373 374 375 376 377
        qemuMonitorClose(test->mon);
    }

    virObjectUnref(test->vm);

378
    virThreadJoin(&test->thread);
379

380 381 382
    if (timer != -1)
        virEventRemoveTimeout(timer);

383 384 385
    VIR_FREE(test->incoming);
    VIR_FREE(test->outgoing);

386 387 388 389
    for (i = 0 ; i < test->nitems ; i++)
        qemuMonitorTestItemFree(test->items[i]);
    VIR_FREE(test->items);

390 391 392 393 394
    if (test->tmpdir && rmdir(test->tmpdir) < 0)
        VIR_WARN("Failed to remove tempdir: %s", strerror(errno));

    VIR_FREE(test->tmpdir);

395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
    virMutexDestroy(&test->lock);
    VIR_FREE(test);
}


int
qemuMonitorTestAddItem(qemuMonitorTestPtr test,
                       const char *command_name,
                       const char *response)
{
    qemuMonitorTestItemPtr item;

    if (VIR_ALLOC(item) < 0)
        goto no_memory;

    if (!(item->command_name = strdup(command_name)) ||
        !(item->response = strdup(response)))
        goto no_memory;

    virMutexLock(&test->lock);
    if (VIR_EXPAND_N(test->items, test->nitems, 1) < 0) {
        virMutexUnlock(&test->lock);
        goto no_memory;
    }
    test->items[test->nitems - 1] = item;

    virMutexUnlock(&test->lock);

    return 0;

no_memory:
    virReportOOMError();
    qemuMonitorTestItemFree(item);
    return -1;
}


static void qemuMonitorTestEOFNotify(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
                                         virDomainObjPtr vm ATTRIBUTE_UNUSED)
{
}

static void qemuMonitorTestErrorNotify(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
                                           virDomainObjPtr vm ATTRIBUTE_UNUSED)
{
}


static qemuMonitorCallbacks qemuCallbacks = {
    .eofNotify = qemuMonitorTestEOFNotify,
    .errorNotify = qemuMonitorTestErrorNotify,
};

448
#define QEMU_JSON_GREETING "{\"QMP\": {\"version\": {\"qemu\": {\"micro\": 1, \"minor\": 0, \"major\": 1}, \"package\": \" (qemu-kvm-1.0.1)\"}, \"capabilities\": []}}"
449 450
/* We skip the normal handshake reply of "{\"execute\":\"qmp_capabilities\"}" */

451 452
#define QEMU_TEXT_GREETING "QEMU 1.0,1 monitor - type 'help' for more information"

453
qemuMonitorTestPtr qemuMonitorTestNew(bool json, virDomainXMLOptionPtr xmlopt)
454
{
G
Guido Günther 已提交
455
    qemuMonitorTestPtr test = NULL;
456
    virDomainChrSourceDef src;
457 458
    char *path = NULL;
    char *tmpdir_template = NULL;
459

460 461
    if (VIR_ALLOC(test) < 0)
        goto no_memory;
462 463 464 465 466 467 468 469

    if (virMutexInit(&test->lock) < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       "Cannot initialize mutex");
        VIR_FREE(test);
        return NULL;
    }

470 471 472 473 474 475 476 477 478 479 480 481 482 483
    if (!(tmpdir_template = strdup("/tmp/libvirt_XXXXXX")))
        goto no_memory;

    if (!(test->tmpdir = mkdtemp(tmpdir_template))) {
        virReportSystemError(errno, "%s",
                             "Failed to create temporary directory");
        goto error;
    }

    tmpdir_template = NULL;

    if (virAsprintf(&path, "%s/qemumonitorjsontest.sock", test->tmpdir) < 0)
        goto no_memory;

484
    test->json = json;
485
    if (!(test->vm = virDomainObjNew(xmlopt)))
486 487 488 489 490 491 492 493 494
        goto error;

    if (virNetSocketNewListenUNIX(path,
                                  0700,
                                  getuid(),
                                  getgid(),
                                  &test->server) < 0)
        goto error;

495 496 497 498
    memset(&src, 0, sizeof(src));
    src.type = VIR_DOMAIN_CHR_TYPE_UNIX;
    src.data.nix.path = (char *)path;
    src.data.nix.listen = false;
499 500 501 502 503 504

    if (virNetSocketListen(test->server, 1) < 0)
        goto error;

    if (!(test->mon = qemuMonitorOpen(test->vm,
                                      &src,
505
                                      json ? 1 : 0,
506 507
                                      &qemuCallbacks)))
        goto error;
508
    virObjectLock(test->mon);
509 510 511 512 513 514

    if (virNetSocketAccept(test->server, &test->client) < 0)
        goto error;
    if (!test->client)
        goto error;

515 516 517 518 519
    if (qemuMonitorTestAddReponse(test, json ?
                                  QEMU_JSON_GREETING :
                                  QEMU_TEXT_GREETING) < 0)
        goto error;

520
    if (virNetSocketAddIOCallback(test->client,
521
                                  VIR_EVENT_HANDLE_WRITABLE,
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537
                                  qemuMonitorTestIO,
                                  test,
                                  NULL) < 0)
        goto error;

    virMutexLock(&test->lock);
    if (virThreadCreate(&test->thread,
                        true,
                        qemuMonitorTestWorker,
                        test) < 0) {
        virMutexUnlock(&test->lock);
        goto error;
    }
    test->running = true;
    virMutexUnlock(&test->lock);

G
Guido Günther 已提交
538 539
cleanup:
    VIR_FREE(path);
540 541
    return test;

542 543 544
no_memory:
    virReportOOMError();

545
error:
546
    VIR_FREE(tmpdir_template);
547
    qemuMonitorTestFree(test);
548
    test = NULL;
G
Guido Günther 已提交
549
    goto cleanup;
550 551 552 553 554 555
}

qemuMonitorPtr qemuMonitorTestGetMonitor(qemuMonitorTestPtr test)
{
    return test->mon;
}