proxy_internal.c 26.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
/*
 * proxy_client.c: client side of the communication with the libvirt proxy.
 *
 * Copyright (C) 2006 Red Hat, Inc.
 *
 * See COPYING.LIB for the License of this software
 *
 * Daniel Veillard <veillard@redhat.com>
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
#include "internal.h"
22 23
#include "driver.h"
#include "proxy_internal.h"
24 25 26

#define STANDALONE

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
static int debug = 0;

static int xenProxyClose(virConnectPtr conn);
static int xenProxyOpen(virConnectPtr conn, const char *name, int flags);
static int xenProxyGetVersion(virConnectPtr conn, unsigned long *hvVer);
static int xenProxyNodeGetInfo(virConnectPtr conn, virNodeInfoPtr info);
static int xenProxyListDomains(virConnectPtr conn, int *ids, int maxids);
static int xenProxyNumOfDomains(virConnectPtr conn);
static virDomainPtr xenProxyLookupByID(virConnectPtr conn, int id);
static virDomainPtr xenProxyLookupByUUID(virConnectPtr conn,
					 const unsigned char *uuid);
static virDomainPtr xenProxyDomainLookupByName(virConnectPtr conn,
					       const char *domname);
static unsigned long xenProxyDomainGetMaxMemory(virDomainPtr domain);
static int xenProxyDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info);
42
static char *xenProxyDomainDumpXML(virDomainPtr domain, int flags);
43
static char *xenProxyDomainGetOSType(virDomainPtr domain);
44 45 46 47 48 49 50 51 52 53

static virDriver xenProxyDriver = {
    VIR_DRV_XEN_PROXY,
    "XenProxy",
    0,
    NULL, /* init */
    xenProxyOpen, /* open */
    xenProxyClose, /* close */
    NULL, /* type */
    xenProxyGetVersion, /* version */
54
    xenProxyNodeGetInfo, /* nodeGetInfo */
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
    xenProxyListDomains, /* listDomains */
    xenProxyNumOfDomains, /* numOfDomains */
    NULL, /* domainCreateLinux */
    xenProxyLookupByID, /* domainLookupByID */
    xenProxyLookupByUUID, /* domainLookupByUUID */
    xenProxyDomainLookupByName, /* domainLookupByName */
    NULL, /* domainSuspend */
    NULL, /* domainResume */
    NULL, /* domainShutdown */
    NULL, /* domainReboot */
    NULL, /* domainDestroy */
    NULL, /* domainFree */
    NULL, /* domainGetName */
    NULL, /* domainGetID */
    NULL, /* domainGetUUID */
70
    xenProxyDomainGetOSType, /* domainGetOSType */
71 72 73 74 75
    xenProxyDomainGetMaxMemory, /* domainGetMaxMemory */
    NULL, /* domainSetMaxMemory */
    NULL, /* domainSetMemory */
    xenProxyDomainGetInfo, /* domainGetInfo */
    NULL, /* domainSave */
76 77 78
    NULL, /* domainRestore */
    NULL, /* domainSetVcpus */
    NULL, /* domainPinVcpu */
79 80
    NULL, /* domainGetVcpus */
    xenProxyDomainDumpXML, /* domainDumpXML */
81 82 83 84 85
    NULL, /* listDefinedDomains */
    NULL, /* numOfDefinedDomains */
    NULL, /* domainCreate */
    NULL, /* domainDefineXML */
    NULL, /* domainUndefine */
86
};
87

88 89 90 91 92 93 94 95 96
/**
 * xenProxyRegister:
 *
 * Registers the xenHypervisor driver
 */
void xenProxyRegister(void)
{
    virRegisterDriver(&xenProxyDriver);
}
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113
/************************************************************************
 *									*
 *			Error handling					*
 *									*
 ************************************************************************/

/**
 * virProxyError:
 * @conn: the connection if available
 * @error: the error noumber
 * @info: extra information string
 *
 * Handle an error at the xend daemon interface
 */
static void
virProxyError(virConnectPtr conn, virErrorNumber error, const char *info)
{
114 115
    const char *errmsg;

116 117 118 119
    if (error == VIR_ERR_OK)
        return;

    errmsg = __virErrorMsg(error, info);
120
    __virRaiseError(conn, NULL, VIR_FROM_PROXY, error, VIR_ERR_ERROR,
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
                    errmsg, info, NULL, 0, 0, errmsg, info);
}

/************************************************************************
 *									*
 *	Automatic startup of the proxy server if it is not running	*
 *									*
 ************************************************************************/
/**
 * virProxyFindServerPath:
 *
 * Tries to find the path to the gam_server binary.
 * 
 * Returns path on success or NULL in case of error.
 */
static const char *
virProxyFindServerPath(void)
{
    static const char *serverPaths[] = {
        BINDIR "/libvirt_proxy",
141
        "/usr/bin/libvirt_proxy_dbg",
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
        NULL
    };
    int i;
    const char *debugProxy = getenv("LIBVIRT_DEBUG_PROXY");

    if (debugProxy)
        return(debugProxy);

    for (i = 0; serverPaths[i]; i++) {
        if (access(serverPaths[i], X_OK | R_OK) == 0) {
            return serverPaths[i];
        }
    }
    return NULL;
}

/**
 * virProxyForkServer:
 *
 * Forks and try to launch the proxy server processing the requests for
 * libvirt when communicating with Xen.
 *
 * Returns 0 in case of success or -1 in case of detected error.
 */
static int
virProxyForkServer(void)
{
    const char *proxyPath = virProxyFindServerPath();
    int ret, pid, status;

    if (!proxyPath) {
        fprintf(stderr, "failed to find libvirt_proxy\n");
	return(-1);
    }

    if (debug)
        fprintf(stderr, "Asking to launch %s\n", proxyPath);

    /* Become a daemon */
    pid = fork();
    if (pid == 0) {
        long open_max;
	long i;

        /* don't hold open fd opened from the client of the library */
	open_max = sysconf (_SC_OPEN_MAX);
	for (i = 0; i < open_max; i++)
	    fcntl (i, F_SETFD, FD_CLOEXEC);

        setsid();
        if (fork() == 0) {
            execl(proxyPath, proxyPath, NULL);
194
            fprintf(stderr, _("failed to exec %s\n"), proxyPath);
195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
        }
        /*
         * calling exit() generate troubles for termination handlers
         */
        _exit(0);
    }

    /*
     * do a waitpid on the intermediate process to avoid zombies.
     */
retry_wait:
    ret = waitpid(pid, &status, 0);
    if (ret < 0) {
        if (errno == EINTR)
            goto retry_wait;
    }

    return (0);
}

/************************************************************************
 *									*
 *		Processing of client sockets				*
 *									*
 ************************************************************************/

/**
 * virProxyOpenClientSocket:
 * @path: the fileame for the socket
 *
 * try to connect to the socket open by libvirt_proxy
 *
 * Returns the associated file descriptor or -1 in case of failure
 */
static int
virProxyOpenClientSocket(const char *path) {
    int fd;
    struct sockaddr_un addr;
    int trials = 0;

retry:
    fd = socket(PF_UNIX, SOCK_STREAM, 0);
    if (fd < 0) {
	return(-1);
    }

    /*
     * Abstract socket do not hit the filesystem, way more secure and 
     * garanteed to be atomic
     */
    memset(&addr, 0, sizeof(addr));
    addr.sun_family = AF_UNIX;
    addr.sun_path[0] = '\0';
    strncpy(&addr.sun_path[1], path, (sizeof(addr) - 4) - 2);

    /*
     * now bind the socket to that address and listen on it
     */
    if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
	close(fd);
	if (trials < 3) {
	    if (virProxyForkServer() < 0)
	        return(-1);
	    trials++;
	    usleep(5000 * trials * trials);
	    goto retry;
	}
	return (-1);
    }

    if (debug > 0)
        fprintf(stderr, "connected to unix socket %s via %d\n", path, fd);

    return (fd);
}

/**
 * virProxyCloseClientSocket:
 * @fd: the file descriptor for the socket
 *
 * Close the socket from that client
 *
 * Returns 0 in case of success and -1 in case of error
 */
static int
virProxyCloseClientSocket(int fd) {
    int ret;

    if (fd < 0)
        return(-1);

    ret = close(fd);
    if (ret != 0)
288
        fprintf(stderr, _("Failed to close socket %d\n"), fd);
289 290 291 292 293 294 295 296 297 298
    else if (debug > 0)
	fprintf(stderr, "Closed socket %d\n", fd);
    return(ret);
}

/**
 * virProxyReadClientSocket:
 * @fd: the socket 
 * @buffer: the target memory area
 * @len: the lenght in bytes
299
 * @quiet: quiet access
300 301 302 303 304 305
 *
 * Process a read from a client socket
 *
 * Returns the number of byte read or -1 in case of error.
 */
static int
306
virProxyReadClientSocket(int fd, char *buffer, int len, int quiet) {
307 308 309 310 311 312 313 314 315 316 317 318 319
    int ret;

    if ((fd < 0) || (buffer == NULL) || (len < 0))
        return(-1);

retry:
    ret = read(fd, buffer, len);
    if (ret < 0) {
        if (errno == EINTR) {
	    if (debug > 0)
	        fprintf(stderr, "read socket %d interrupted\n", fd);
	    goto retry;
	}
320
	if (!quiet)
321
            fprintf(stderr, _("Failed to read socket %d\n"), fd);
322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
	return(-1);
    }

    if (debug)
	fprintf(stderr, "read %d bytes from socket %d\n",
		ret, fd);
    return(ret);
}

/**
 * virProxyWriteClientSocket:
 * @fd: the socket 
 * @data: the data
 * @len: the lenght of data in bytes
 *
 * Process a read from a client socket
 */
static int
virProxyWriteClientSocket(int fd, const char *data, int len) {
    int ret;

    if ((fd < 0) || (data == NULL) || (len < 0))
        return(-1);

retry:
    ret = write(fd, data, len);
    if (ret < 0) {
        if (errno == EINTR) {
	    if (debug > 0)
	        fprintf(stderr, "write socket %d, %d bytes interrupted\n",
		        fd, len);
	    goto retry;
	}
355
        fprintf(stderr, _("Failed to write to socket %d\n"), fd);
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
	return(-1);
    }
    if (debug)
	fprintf(stderr, "wrote %d bytes to socket %d\n",
		len, fd);

    return(0);
}

/************************************************************************
 *									*
 *			Proxy commands processing			*
 *									*
 ************************************************************************/

/**
 * xenProxyClose:
 * @conn: pointer to the hypervisor connection
 *
 * Shutdown the Xen proxy communication layer
 */
377
static int
378 379
xenProxyClose(virConnectPtr conn) {
    if ((conn == NULL) || (conn->proxy < 0))
380
        return(-1);
381 382
    virProxyCloseClientSocket(conn->proxy);
    conn->proxy = -1;
383
    return (0);
384 385 386 387
}

static int 
xenProxyCommand(virConnectPtr conn, virProxyPacketPtr request,
388
                virProxyFullPacketPtr answer, int quiet) {
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411
    static int serial = 0;
    int ret;
    virProxyPacketPtr res = NULL;

    if ((conn == NULL) || (conn->proxy < 0))
        return(-1);

    /*
     * normal communication serial numbers are in 0..4095
     */
    ++serial;
    if (serial >= 4096)
        serial = 0;
    request->version = PROXY_PROTO_VERSION;
    request->serial = serial;
    ret  = virProxyWriteClientSocket(conn->proxy, (const char *) request,
                                     request->len);
    if (ret < 0)
        return(-1);
retry:
    if (answer == NULL) {
        /* read in situ */
	ret  = virProxyReadClientSocket(conn->proxy, (char *) request,
412
	                                sizeof(virProxyPacket), quiet);
413 414 415 416
	if (ret < 0)
	    return(-1);
	if (ret != sizeof(virProxyPacket)) {
	    fprintf(stderr,
417
		    _("Communication error with proxy: got %d bytes of %d\n"),
418
		    ret, (int) sizeof(virProxyPacket));
419 420 421 422 423 424
	    xenProxyClose(conn);
	    return(-1);
	}
	res = request;
	if (res->len != sizeof(virProxyPacket)) {
	    fprintf(stderr,
425
		    _("Communication error with proxy: expected %d bytes got %d\n"),
426
		    (int) sizeof(virProxyPacket), res->len);
427 428 429 430
	    xenProxyClose(conn);
	    return(-1);
	}
    } else {
431 432
        /* read in packet provided */
        ret  = virProxyReadClientSocket(conn->proxy, (char *) answer,
433
	                                sizeof(virProxyPacket), quiet);
434 435 436 437
	if (ret < 0)
	    return(-1);
	if (ret != sizeof(virProxyPacket)) {
	    fprintf(stderr,
438
		    _("Communication error with proxy: got %d bytes of %d\n"),
439
		    ret, (int) sizeof(virProxyPacket));
440 441 442
	    xenProxyClose(conn);
	    return(-1);
	}
443
	res = (virProxyPacketPtr) answer;
444
	if ((res->len < sizeof(virProxyPacket)) ||
445
	    (res->len > sizeof(virProxyFullPacket))) {
446
	    fprintf(stderr,
447
		    _("Communication error with proxy: got %d bytes packet\n"),
448 449 450 451 452
		    res->len);
	    xenProxyClose(conn);
	    return(-1);
	}
	if (res->len > sizeof(virProxyPacket)) {
453
	    ret  = virProxyReadClientSocket(conn->proxy,
454
	                           (char *) &(answer->extra.arg[0]),
455
	                                    res->len - ret, quiet);
456 457
	    if (ret != (int) (res->len - sizeof(virProxyPacket))) {
		fprintf(stderr,
458
			_("Communication error with proxy: got %d bytes of %d\n"),
459
			ret, (int) sizeof(virProxyPacket));
460 461 462 463 464 465 466 467 468 469 470
		xenProxyClose(conn);
		return(-1);
	    }
	}
    }
    /*
     * do more checks on the incoming packet.
     */
    if ((res == NULL) || (res->version != PROXY_PROTO_VERSION) ||
        (res->len < sizeof(virProxyPacket))) {
	fprintf(stderr,
471
		_("Communication error with proxy: malformed packet\n"));
472 473 474 475 476
	xenProxyClose(conn);
	return(-1);
    }
    if (res->serial != serial) {
        TODO /* Asynchronous communication */
477
	fprintf(stderr, _("got asynchronous packet number %d\n"), res->serial);
478 479 480 481 482 483
        goto retry;
    }
    return(0);
}

/**
484
 * xenProxyOpen:
485
 * @conn: pointer to the hypervisor connection
486 487
 * @name: URL for the target, NULL for local
 * @flags: combination of virDrvOpenFlag(s)
488 489
 *
 * Try to initialize the Xen proxy communication layer
490
 * This can be opened only for a read-only kind of access
491 492 493 494
 *
 * Returns 0 in case of success, and -1 in case of failure
 */
int
495 496
xenProxyOpen(virConnectPtr conn, const char *name, int flags)
{
497 498 499
    virProxyPacket req;
    int ret;
    int fd;
500 501 502 503 504
    
    if ((name != NULL) && (strcasecmp(name, "xen")))
        return(-1);
    if (!(flags & VIR_DRV_OPEN_RO))
        return(-1);
505
        
506 507 508 509 510 511
    conn->proxy = -1;
    fd = virProxyOpenClientSocket(PROXY_SOCKET_PATH);
    if (fd < 0) {
        if (!(flags & VIR_DRV_OPEN_QUIET))
	    virProxyError(conn, VIR_ERR_NO_XEN, PROXY_SOCKET_PATH);
	return(-1);
512
    }
513
    conn->proxy = fd;
514 515 516 517

    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_NONE;
    req.len = sizeof(req);
518
    ret = xenProxyCommand(conn, &req, NULL, 1);
519
    if ((ret < 0) || (req.command != VIR_PROXY_NONE)) {
520 521
        if (!(flags & VIR_DRV_OPEN_QUIET))
	    virProxyError(conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561
        xenProxyClose(conn);
	return(-1);
    }
    return(0);
}

/************************************************************************
 *									*
 *			Driver entry points				*
 *									*
 ************************************************************************/

/**
 * xenProxyGetVersion:
 * @conn: pointer to the Xen Daemon block
 * @hvVer: return value for the version of the running hypervisor (OUT)
 *
 * Get the version level of the Hypervisor running.
 *
 * Returns -1 in case of error, 0 otherwise. if the version can't be
 *    extracted by lack of capacities returns 0 and @hvVer is 0, otherwise
 *    @hvVer value is major * 1,000,000 + minor * 1,000 + release
 */
static int
xenProxyGetVersion(virConnectPtr conn, unsigned long *hvVer)
{
    virProxyPacket req;
    int ret;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (-1);
    }
    if (hvVer == NULL) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (-1);
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_VERSION;
    req.len = sizeof(req);
562
    ret = xenProxyCommand(conn, &req, NULL, 0);
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    *hvVer = req.data.larg;
    return(0);
}

/**
 * xenProxyListDomains:
 * @conn: pointer to the hypervisor connection
 * @ids: array to collect the list of IDs of active domains
 * @maxids: size of @ids
 *
 * Collect the list of active domains, and store their ID in @maxids
 *
 * Returns the number of domain found or -1 in case of error
 */
static int
xenProxyListDomains(virConnectPtr conn, int *ids, int maxids)
{
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599
    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;
    int nb;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (-1);
    }
    if ((ids == NULL) || (maxids <= 0)) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (-1);
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_LIST;
    req.len = sizeof(req);
600
    ret = xenProxyCommand(conn, &req, &ans, 0);
601 602 603 604 605
    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    nb = ans.data.arg;
606 607 608 609
    if ((nb > 1020) || (nb <= 0) ||
        (ans.len <= sizeof(virProxyPacket)) ||
	(ans.len > sizeof(virProxyFullPacket))) {
        virProxyError(conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
610
        return(-1);
611
    }
612 613 614 615 616
    if (nb > maxids)
        nb = maxids;
    memmove(ids, &ans.extra.arg[0], nb * sizeof(int));

    return(nb);
617 618 619 620 621 622 623 624 625 626 627 628 629
}

/**
 * xenProxyNumOfDomains:
 * @conn: pointer to the hypervisor connection
 *
 * Provides the number of active domains.
 *
 * Returns the number of domain found or -1 in case of error
 */
static int
xenProxyNumOfDomains(virConnectPtr conn)
{
630 631 632 633 634 635 636 637 638 639
    virProxyPacket req;
    int ret;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (-1);
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_NUM_DOMAIN;
    req.len = sizeof(req);
640
    ret = xenProxyCommand(conn, &req, NULL, 0);
641 642 643 644 645
    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    return(req.data.arg);
646 647
}

648

649
/**
650
 * xenProxyDomainGetDomMaxMemory:
651 652 653
 * @conn: pointer to the hypervisor connection
 * @id: the domain ID number
 *
654
 * Ask the Xen Daemon for the maximum memory allowed for a domain
655
 *
656
 * Returns the memory size in kilobytes or 0 in case of error.
657
 */
658 659 660 661 662 663 664 665
static unsigned long
xenProxyDomainGetDomMaxMemory(virConnectPtr conn, int id)
{
    virProxyPacket req;
    int ret;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
666
        return (0);
667 668 669 670 671
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_MAX_MEMORY;
    req.data.arg = id;
    req.len = sizeof(req);
672
    ret = xenProxyCommand(conn, &req, NULL, 0);
673 674
    if (ret < 0) {
        xenProxyClose(conn);
675
        return(0);
676 677
    }
    return(req.data.larg);
678 679 680
}

/**
681 682
 * xenProxyDomainGetMaxMemory:
 * @domain: pointer to the domain block
683
 *
684
 * Ask the Xen Daemon for the maximum memory allowed for a domain
685
 *
686
 * Returns the memory size in kilobytes or 0 in case of error.
687
 */
688 689
static unsigned long
xenProxyDomainGetMaxMemory(virDomainPtr domain)
690
{
691 692 693 694 695 696 697
    if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
	if (domain == NULL)
	    virProxyError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
	else
	    virProxyError(domain->conn, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        return (0);
    }
698 699
    if (domain->handle < 0)
        return (0);
700
    return(xenProxyDomainGetDomMaxMemory(domain->conn, domain->handle));
701 702 703
}

/**
704 705 706
 * xenProxyDomainGetInfo:
 * @domain: a domain object
 * @info: pointer to a virDomainInfo structure allocated by the user
707
 *
708 709
 * This method looks up information about a domain and update the
 * information block provided.
710
 *
711
 * Returns 0 in case of success, -1 in case of error
712 713
 */
static int
714
xenProxyDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
715
{
716 717 718 719 720
    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;

    if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
721 722 723 724 725
        if (domain == NULL)
            virProxyError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        else
            virProxyError(domain->conn, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        return (-1);
726
    }
727 728
    if (domain->handle < 0)
        return (-1);
729 730
    if (info == NULL) {
        virProxyError(domain->conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
731
        return (-1);
732 733 734
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_DOMAIN_INFO;
735
    req.data.arg = domain->handle;
736
    req.len = sizeof(req);
737
    ret = xenProxyCommand(domain->conn, &req, &ans, 0);
738 739
    if (ret < 0) {
        xenProxyClose(domain->conn);
740
        return(-1);
741 742 743
    }
    if (ans.len != sizeof(virProxyPacket) + sizeof(virDomainInfo)) {
        virProxyError(domain->conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
744
        return (-1);
745 746
    }
    memmove(info, &ans.extra.dinfo, sizeof(virDomainInfo));
747

748 749
    return(0);
}
750 751

/**
752 753 754
 * xenProxyLookupByID:
 * @conn: pointer to the hypervisor connection
 * @id: the domain ID number
755
 *
756
 * Try to find a domain based on the hypervisor ID number
757
 *
758
 * Returns a new domain object or NULL in case of failure
759
 */
760 761
static virDomainPtr
xenProxyLookupByID(virConnectPtr conn, int id)
762
{
763 764 765 766 767 768 769 770 771 772 773
    virProxyPacket req;
    virProxyFullPacket ans;
    unsigned char uuid[16];
    const char *name;
    int ret;
    virDomainPtr res;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (NULL);
    }
774 775 776 777
    if (id < 0) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (NULL);
    }
778 779 780 781
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_LOOKUP_ID;
    req.data.arg = id;
    req.len = sizeof(req);
782
    ret = xenProxyCommand(conn, &req, &ans, 0);
783 784 785 786
    if (ret < 0) {
        xenProxyClose(conn);
	return(NULL);
    }
787
    if (ans.data.arg == -1) {
788 789 790 791 792 793 794
	return(NULL);
    }
    memcpy(uuid, &ans.extra.str[0], 16);
    name = &ans.extra.str[16];
    res = virGetDomain(conn, name, uuid);

    if (res == NULL)
795
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
796 797 798 799
    else
	res->handle = id;
    
    return(res);
800 801 802
}

/**
803 804 805
 * xenProxyLookupByUUID:
 * @conn: pointer to the hypervisor connection
 * @uuid: the raw UUID for the domain
806
 *
807
 * Try to lookup a domain on xend based on its UUID.
808
 *
809
 * Returns a new domain object or NULL in case of failure
810
 */
811 812
static virDomainPtr
xenProxyLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
813
{
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
    virProxyFullPacket req;
    const char *name;
    int ret;
    virDomainPtr res;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (NULL);
    }
    if (uuid == NULL) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (NULL);
    }
    memset(&req, 0, sizeof(virProxyPacket));
    req.command = VIR_PROXY_LOOKUP_UUID;
    req.len = sizeof(virProxyPacket) + 16;
830
    ret = xenProxyCommand(conn, (virProxyPacketPtr) &req, &req, 0);
831 832 833 834 835 836 837 838 839 840 841
    if (ret < 0) {
        xenProxyClose(conn);
	return(NULL);
    }
    if (req.data.arg == -1) {
	return(NULL);
    }
    name = &req.extra.str[0];
    res = virGetDomain(conn, name, uuid);

    if (res == NULL)
842
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
843 844 845 846
    else
	res->handle = req.data.arg;
    
    return(res);
847 848
}

849 850 851 852 853 854 855 856 857 858
/**
 * xenProxyDomainLookupByName:
 * @conn: A xend instance
 * @name: The name of the domain
 *
 * This method looks up information about a domain based on its name
 *
 * Returns a new domain object or NULL in case of failure
 */
static virDomainPtr
859
xenProxyDomainLookupByName(virConnectPtr conn, const char *name)
860
{
861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
    virProxyFullPacket req;
    int ret, len;
    virDomainPtr res;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (NULL);
    }
    if (name == NULL) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (NULL);
    }
    len = strlen(name);
    if (len > 1000) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (NULL);
    }
    memset(&req, 0, sizeof(virProxyPacket));
    req.command = VIR_PROXY_LOOKUP_NAME;
    req.len = sizeof(virProxyPacket) + len + 1;
    strcpy(&req.extra.str[0], name);
882
    ret = xenProxyCommand(conn, (virProxyPacketPtr) &req, &req, 0);
883 884 885 886 887 888 889 890 891 892
    if (ret < 0) {
        xenProxyClose(conn);
	return(NULL);
    }
    if (req.data.arg == -1) {
	return(NULL);
    }
    res = virGetDomain(conn, name, (const unsigned char *)&req.extra.str[0]);

    if (res == NULL)
893
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
894 895 896 897
    else
	res->handle = req.data.arg;
    
    return(res);
898
}
899

900 901 902 903 904 905 906 907 908 909 910
/**
 * xenProxyNodeGetInfo:
 * @conn: pointer to the Xen Daemon block
 * @info: pointer to a virNodeInfo structure allocated by the user
 * 
 * Extract hardware information about the node.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
static int
xenProxyNodeGetInfo(virConnectPtr conn, virNodeInfoPtr info) {
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (-1);
    }
    if (info == NULL) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (-1);
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_NODE_INFO;
    req.data.arg = 0;
    req.len = sizeof(req);
927
    ret = xenProxyCommand(conn, &req, &ans, 0);
928 929 930 931 932 933 934 935 936 937 938 939
    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    if (ans.data.arg == -1) {
	return(-1);
    }
    if (ans.len != sizeof(virProxyPacket) + sizeof(virNodeInfo)) {
	return(-1);
    }
    memcpy(info, &ans.extra.ninfo, sizeof(virNodeInfo));
    return(0);
940
}
941

942 943 944 945 946 947 948 949 950 951
/**
 * xenProxyDomainDumpXML:
 * @domain: a domain object
 * @flags: xml generation flags
 *
 * This method generates an XML description of a domain.
 *
 * Returns the XML document on success, NULL otherwise. 
 */
static char *
952
xenProxyDomainDumpXML(virDomainPtr domain, int flags ATTRIBUTE_UNUSED)
953 954 955 956 957 958 959 960 961 962 963 964 965 966
{
    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;
    int xmllen;
    char *xml;

    if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
	if (domain == NULL)
	    virProxyError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
	else
	    virProxyError(domain->conn, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        return (NULL);
    }
967 968
    if (domain->handle < 0)
        return (NULL);
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_DOMAIN_XML;
    req.data.arg = domain->handle;
    req.len = sizeof(req);
    ret = xenProxyCommand(domain->conn, &req, &ans, 0);
    if (ret < 0) {
        xenProxyClose(domain->conn);
	return(NULL);
    }
    if (ans.len <= sizeof(virProxyPacket)) {
        virProxyError(domain->conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
	return (NULL);
    }
    xmllen = ans.len - sizeof(virProxyPacket);
    if (!(xml = malloc(xmllen+1))) {
984 985
	virProxyError(domain->conn, VIR_ERR_NO_MEMORY, __FUNCTION__);
        return NULL;
986 987 988 989 990 991
    }
    memmove(xml, &ans.extra.dinfo, xmllen);
    xml[xmllen] = '\0';

    return(xml);
}
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026

/**
 * xenProxyDomainGetOSType:
 * @domain: a domain object
 *
 * Get the type of domain operation system.
 *
 * Returns the new string or NULL in case of error, the string must be
 *         freed by the caller.
 */
static char *
xenProxyDomainGetOSType(virDomainPtr domain)
{
    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;
    int oslen;
    char *ostype;

    if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
	if (domain == NULL)
	    virProxyError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
	else
	    virProxyError(domain->conn, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        return (NULL);
    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_DOMAIN_OSTYPE;
    req.data.arg = domain->handle;
    req.len = sizeof(req);
    ret = xenProxyCommand(domain->conn, &req, &ans, 0);
    if (ret < 0) {
        xenProxyClose(domain->conn);
	return(NULL);
    }
1027 1028 1029 1030
    if ((ans.len == sizeof(virProxyPacket)) && (ans.data.arg < 0)) {
	return(NULL);
    }

1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
    if (ans.len <= sizeof(virProxyPacket)) {
        virProxyError(domain->conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
	return (NULL);
    }
    oslen = ans.len - sizeof(virProxyPacket);
    if (!(ostype = malloc(oslen+1))) {
	virProxyError(domain->conn, VIR_ERR_NO_MEMORY, __FUNCTION__);
        return NULL;
    }
    memmove(ostype, &ans.extra.dinfo, oslen);
    ostype[oslen] = '\0';

    return(ostype);
}