proxy_internal.c 26.8 KB
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/*
 * 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"
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#include "driver.h"
#include "proxy_internal.h"
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#define STANDALONE

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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);
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static char *xenProxyDomainDumpXML(virDomainPtr domain, int flags);
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static char *xenProxyDomainGetOSType(virDomainPtr domain);
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static virDriver xenProxyDriver = {
    VIR_DRV_XEN_PROXY,
    "XenProxy",
    0,
    NULL, /* init */
    xenProxyOpen, /* open */
    xenProxyClose, /* close */
    NULL, /* type */
    xenProxyGetVersion, /* version */
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    xenProxyNodeGetInfo, /* nodeGetInfo */
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    xenProxyListDomains, /* listDomains */
    xenProxyNumOfDomains, /* numOfDomains */
    NULL, /* domainCreateLinux */
    xenProxyLookupByID, /* domainLookupByID */
    xenProxyLookupByUUID, /* domainLookupByUUID */
    xenProxyDomainLookupByName, /* domainLookupByName */
    NULL, /* domainSuspend */
    NULL, /* domainResume */
    NULL, /* domainShutdown */
    NULL, /* domainReboot */
    NULL, /* domainDestroy */
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    xenProxyDomainGetOSType, /* domainGetOSType */
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    xenProxyDomainGetMaxMemory, /* domainGetMaxMemory */
    NULL, /* domainSetMaxMemory */
    NULL, /* domainSetMemory */
    xenProxyDomainGetInfo, /* domainGetInfo */
    NULL, /* domainSave */
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    NULL, /* domainRestore */
D
Daniel Veillard 已提交
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    NULL, /* domainCoreDump */
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    NULL, /* domainSetVcpus */
    NULL, /* domainPinVcpu */
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    NULL, /* domainGetVcpus */
    xenProxyDomainDumpXML, /* domainDumpXML */
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    NULL, /* listDefinedDomains */
    NULL, /* numOfDefinedDomains */
    NULL, /* domainCreate */
    NULL, /* domainDefineXML */
    NULL, /* domainUndefine */
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    NULL, /* domainAttachDevice */
    NULL, /* domainDetachDevice */
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};
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/**
 * xenProxyRegister:
 *
 * Registers the xenHypervisor driver
 */
void xenProxyRegister(void)
{
    virRegisterDriver(&xenProxyDriver);
}
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/************************************************************************
 *									*
 *			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)
{
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    const char *errmsg;

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    if (error == VIR_ERR_OK)
        return;

    errmsg = __virErrorMsg(error, info);
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    __virRaiseError(conn, NULL, VIR_FROM_PROXY, error, VIR_ERR_ERROR,
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                    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",
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        "/usr/bin/libvirt_proxy_dbg",
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        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);
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            fprintf(stderr, _("failed to exec %s\n"), proxyPath);
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        }
        /*
         * 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)
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        fprintf(stderr, _("Failed to close socket %d\n"), fd);
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    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
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 * @quiet: quiet access
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 *
 * Process a read from a client socket
 *
 * Returns the number of byte read or -1 in case of error.
 */
static int
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virProxyReadClientSocket(int fd, char *buffer, int len, int quiet) {
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    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;
	}
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	if (!quiet)
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            fprintf(stderr, _("Failed to read socket %d\n"), fd);
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	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;
	}
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        fprintf(stderr, _("Failed to write to socket %d\n"), fd);
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	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
 */
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static int
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xenProxyClose(virConnectPtr conn) {
    if ((conn == NULL) || (conn->proxy < 0))
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        return(-1);
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    virProxyCloseClientSocket(conn->proxy);
    conn->proxy = -1;
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    return (0);
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}

static int 
xenProxyCommand(virConnectPtr conn, virProxyPacketPtr request,
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                virProxyFullPacketPtr answer, int quiet) {
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    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,
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	                                sizeof(virProxyPacket), quiet);
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	if (ret < 0)
	    return(-1);
	if (ret != sizeof(virProxyPacket)) {
	    fprintf(stderr,
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		    _("Communication error with proxy: got %d bytes of %d\n"),
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		    ret, (int) sizeof(virProxyPacket));
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	    xenProxyClose(conn);
	    return(-1);
	}
	res = request;
	if (res->len != sizeof(virProxyPacket)) {
	    fprintf(stderr,
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		    _("Communication error with proxy: expected %d bytes got %d\n"),
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		    (int) sizeof(virProxyPacket), res->len);
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	    xenProxyClose(conn);
	    return(-1);
	}
    } else {
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        /* read in packet provided */
        ret  = virProxyReadClientSocket(conn->proxy, (char *) answer,
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	                                sizeof(virProxyPacket), quiet);
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	if (ret < 0)
	    return(-1);
	if (ret != sizeof(virProxyPacket)) {
	    fprintf(stderr,
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		    _("Communication error with proxy: got %d bytes of %d\n"),
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		    ret, (int) sizeof(virProxyPacket));
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	    xenProxyClose(conn);
	    return(-1);
	}
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	res = (virProxyPacketPtr) answer;
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	if ((res->len < sizeof(virProxyPacket)) ||
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	    (res->len > sizeof(virProxyFullPacket))) {
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	    fprintf(stderr,
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		    _("Communication error with proxy: got %d bytes packet\n"),
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		    res->len);
	    xenProxyClose(conn);
	    return(-1);
	}
	if (res->len > sizeof(virProxyPacket)) {
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	    ret  = virProxyReadClientSocket(conn->proxy,
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	                           (char *) &(answer->extra.arg[0]),
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	                                    res->len - ret, quiet);
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	    if (ret != (int) (res->len - sizeof(virProxyPacket))) {
		fprintf(stderr,
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			_("Communication error with proxy: got %d bytes of %d\n"),
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			ret, (int) sizeof(virProxyPacket));
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		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,
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		_("Communication error with proxy: malformed packet\n"));
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	xenProxyClose(conn);
	return(-1);
    }
    if (res->serial != serial) {
        TODO /* Asynchronous communication */
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	fprintf(stderr, _("got asynchronous packet number %d\n"), res->serial);
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        goto retry;
    }
    return(0);
}

/**
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 * xenProxyOpen:
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 * @conn: pointer to the hypervisor connection
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 * @name: URL for the target, NULL for local
 * @flags: combination of virDrvOpenFlag(s)
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 *
 * Try to initialize the Xen proxy communication layer
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 * This can be opened only for a read-only kind of access
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 *
 * Returns 0 in case of success, and -1 in case of failure
 */
int
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xenProxyOpen(virConnectPtr conn, const char *name, int flags)
{
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    virProxyPacket req;
    int ret;
    int fd;
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    if ((name != NULL) && (strcasecmp(name, "xen")))
        return(-1);
    if (!(flags & VIR_DRV_OPEN_RO))
        return(-1);
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    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);
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    }
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    conn->proxy = fd;
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    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_NONE;
    req.len = sizeof(req);
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    ret = xenProxyCommand(conn, &req, NULL, 1);
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    if ((ret < 0) || (req.command != VIR_PROXY_NONE)) {
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        if (!(flags & VIR_DRV_OPEN_QUIET))
	    virProxyError(conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
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        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);
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    ret = xenProxyCommand(conn, &req, NULL, 0);
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    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)
{
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    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);
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    ret = xenProxyCommand(conn, &req, &ans, 0);
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    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    nb = ans.data.arg;
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    if ((nb > 1020) || (nb <= 0) ||
        (ans.len <= sizeof(virProxyPacket)) ||
	(ans.len > sizeof(virProxyFullPacket))) {
        virProxyError(conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
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        return(-1);
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    }
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    if (nb > maxids)
        nb = maxids;
    memmove(ids, &ans.extra.arg[0], nb * sizeof(int));

    return(nb);
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}

/**
 * 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)
{
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    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);
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    ret = xenProxyCommand(conn, &req, NULL, 0);
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    if (ret < 0) {
        xenProxyClose(conn);
	return(-1);
    }
    return(req.data.arg);
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}

647

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/**
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 * xenProxyDomainGetDomMaxMemory:
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 * @conn: pointer to the hypervisor connection
 * @id: the domain ID number
 *
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 * Ask the Xen Daemon for the maximum memory allowed for a domain
654
 *
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 * Returns the memory size in kilobytes or 0 in case of error.
656
 */
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static unsigned long
xenProxyDomainGetDomMaxMemory(virConnectPtr conn, int id)
{
    virProxyPacket req;
    int ret;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
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        return (0);
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    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_MAX_MEMORY;
    req.data.arg = id;
    req.len = sizeof(req);
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    ret = xenProxyCommand(conn, &req, NULL, 0);
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    if (ret < 0) {
        xenProxyClose(conn);
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        return(0);
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    }
    return(req.data.larg);
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}

/**
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 * xenProxyDomainGetMaxMemory:
 * @domain: pointer to the domain block
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 *
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 * Ask the Xen Daemon for the maximum memory allowed for a domain
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 *
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 * Returns the memory size in kilobytes or 0 in case of error.
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 */
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static unsigned long
xenProxyDomainGetMaxMemory(virDomainPtr domain)
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{
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    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);
    }
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    if (domain->id < 0)
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        return (0);
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    return(xenProxyDomainGetDomMaxMemory(domain->conn, domain->id));
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}

/**
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 * xenProxyDomainGetInfo:
 * @domain: a domain object
 * @info: pointer to a virDomainInfo structure allocated by the user
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 *
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 * This method looks up information about a domain and update the
 * information block provided.
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 *
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 * Returns 0 in case of success, -1 in case of error
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 */
static int
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xenProxyDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
714
{
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    virProxyPacket req;
    virProxyFullPacket ans;
    int ret;

    if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
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        if (domain == NULL)
            virProxyError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        else
            virProxyError(domain->conn, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
        return (-1);
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    }
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    if (domain->id < 0)
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        return (-1);
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    if (info == NULL) {
        virProxyError(domain->conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
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        return (-1);
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    }
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_DOMAIN_INFO;
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    req.data.arg = domain->id;
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    req.len = sizeof(req);
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    ret = xenProxyCommand(domain->conn, &req, &ans, 0);
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    if (ret < 0) {
        xenProxyClose(domain->conn);
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        return(-1);
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    }
    if (ans.len != sizeof(virProxyPacket) + sizeof(virDomainInfo)) {
        virProxyError(domain->conn, VIR_ERR_OPERATION_FAILED, __FUNCTION__);
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        return (-1);
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    }
    memmove(info, &ans.extra.dinfo, sizeof(virDomainInfo));
746

747 748
    return(0);
}
749 750

/**
751 752 753
 * xenProxyLookupByID:
 * @conn: pointer to the hypervisor connection
 * @id: the domain ID number
754
 *
755
 * Try to find a domain based on the hypervisor ID number
756
 *
757
 * Returns a new domain object or NULL in case of failure
758
 */
759 760
static virDomainPtr
xenProxyLookupByID(virConnectPtr conn, int id)
761
{
762 763
    virProxyPacket req;
    virProxyFullPacket ans;
764
    unsigned char uuid[VIR_UUID_BUFLEN];
765 766 767 768 769 770 771 772
    const char *name;
    int ret;
    virDomainPtr res;

    if (!VIR_IS_CONNECT(conn)) {
        virProxyError(conn, VIR_ERR_INVALID_CONN, __FUNCTION__);
        return (NULL);
    }
773 774 775 776
    if (id < 0) {
        virProxyError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
	return (NULL);
    }
777 778 779 780
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_LOOKUP_ID;
    req.data.arg = id;
    req.len = sizeof(req);
781
    ret = xenProxyCommand(conn, &req, &ans, 0);
782 783 784 785
    if (ret < 0) {
        xenProxyClose(conn);
	return(NULL);
    }
786
    if (ans.data.arg == -1) {
787 788
	return(NULL);
    }
789 790
    memcpy(uuid, &ans.extra.str[0], VIR_UUID_BUFLEN);
    name = &ans.extra.str[VIR_UUID_BUFLEN];
791 792 793
    res = virGetDomain(conn, name, uuid);

    if (res == NULL)
794
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
795
    else
796
	res->id = id;
797 798
    
    return(res);
799 800 801
}

/**
802 803 804
 * xenProxyLookupByUUID:
 * @conn: pointer to the hypervisor connection
 * @uuid: the raw UUID for the domain
805
 *
806
 * Try to lookup a domain on xend based on its UUID.
807
 *
808
 * Returns a new domain object or NULL in case of failure
809
 */
810 811
static virDomainPtr
xenProxyLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
812
{
813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
    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;
828
    req.len = sizeof(virProxyPacket) + VIR_UUID_BUFLEN;
829
    ret = xenProxyCommand(conn, (virProxyPacketPtr) &req, &req, 0);
830 831 832 833 834 835 836 837 838 839 840
    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)
841
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
842
    else
843
	res->id = req.data.arg;
844 845
    
    return(res);
846 847
}

848 849 850 851 852 853 854 855 856 857
/**
 * 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
858
xenProxyDomainLookupByName(virConnectPtr conn, const char *name)
859
{
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880
    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);
881
    ret = xenProxyCommand(conn, (virProxyPacketPtr) &req, &req, 0);
882 883 884 885 886 887 888 889 890 891
    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)
892
        virProxyError(conn, VIR_ERR_NO_MEMORY, _("allocating domain"));
893
    else
894
	res->id = req.data.arg;
895 896
    
    return(res);
897
}
898

899 900 901 902 903 904 905 906 907 908 909
/**
 * 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) {
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
    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);
926
    ret = xenProxyCommand(conn, &req, &ans, 0);
927 928 929 930 931 932 933 934 935 936 937 938
    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);
939
}
940

941 942 943 944 945 946 947 948 949 950
/**
 * 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 *
951
xenProxyDomainDumpXML(virDomainPtr domain, int flags ATTRIBUTE_UNUSED)
952 953 954 955 956 957 958 959 960 961 962 963 964 965
{
    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);
    }
966
    if (domain->id < 0)
967
        return (NULL);
968 969
    memset(&req, 0, sizeof(req));
    req.command = VIR_PROXY_DOMAIN_XML;
970
    req.data.arg = domain->id;
971 972 973 974 975 976 977 978 979 980 981 982
    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))) {
983 984
	virProxyError(domain->conn, VIR_ERR_NO_MEMORY, __FUNCTION__);
        return NULL;
985 986 987 988 989 990
    }
    memmove(xml, &ans.extra.dinfo, xmllen);
    xml[xmllen] = '\0';

    return(xml);
}
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018

/**
 * 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;
1019
    req.data.arg = domain->id;
1020 1021 1022 1023 1024 1025
    req.len = sizeof(req);
    ret = xenProxyCommand(domain->conn, &req, &ans, 0);
    if (ret < 0) {
        xenProxyClose(domain->conn);
	return(NULL);
    }
1026 1027 1028 1029
    if ((ans.len == sizeof(virProxyPacket)) && (ans.data.arg < 0)) {
	return(NULL);
    }

1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
    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);
}