qemu_capabilities.c 81.6 KB
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/*
 * qemu_capabilities.c: QEMU capabilities generation
 *
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 * Copyright (C) 2006-2013 Red Hat, Inc.
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 * Copyright (C) 2006 Daniel P. Berrange
 *
 * 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
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 * License along with this library.  If not, see
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 * <http://www.gnu.org/licenses/>.
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 *
 * Author: Daniel P. Berrange <berrange@redhat.com>
 */

#include <config.h>

#include "qemu_capabilities.h"
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#include "viralloc.h"
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#include "virlog.h"
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#include "virerror.h"
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#include "virfile.h"
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#include "virpidfile.h"
#include "virprocess.h"
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#include "nodeinfo.h"
#include "cpu/cpu.h"
#include "domain_conf.h"
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#include "vircommand.h"
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#include "virbitmap.h"
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#include "virnodesuspend.h"
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#include "qemu_monitor.h"
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#include "virstring.h"
41

42
#include <fcntl.h>
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#include <sys/stat.h>
#include <unistd.h>
#include <sys/wait.h>
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#include <stdarg.h>
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#define VIR_FROM_THIS VIR_FROM_QEMU

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/* While not public, these strings must not change. They
 * are used in domain status files which are read on
 * daemon restarts
 */
54
VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
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              "kqemu",  /* 0 */
              "vnc-colon",
              "no-reboot",
              "drive",
              "drive-boot",

              "name", /* 5 */
              "uuid",
              "domid",
              "vnet-hdr",
              "migrate-kvm-stdio",

              "migrate-qemu-tcp", /* 10 */
              "migrate-qemu-exec",
              "drive-cache-v2",
              "kvm",
              "drive-format",

              "vga", /* 15 */
              "0.10",
              "pci-device",
              "mem-path",
              "drive-serial",

              "xen-domid", /* 20 */
              "migrate-qemu-unix",
              "chardev",
              "enable-kvm",
              "monitor-json",

              "balloon", /* 25 */
              "device",
              "sdl",
              "smp-topology",
              "netdev",

              "rtc", /* 30 */
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              "vhost-net",
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              "rtc-td-hack",
              "no-hpet",
              "no-kvm-pit",

              "tdf", /* 35 */
              "pci-configfd",
              "nodefconfig",
              "boot-menu",
              "enable-kqemu",

              "fsdev", /* 40 */
              "nesting",
              "name-process",
              "drive-readonly",
              "smbios-type",

              "vga-qxl", /* 45 */
              "spice",
              "vga-none",
              "migrate-qemu-fd",
              "boot-index",

              "hda-duplex", /* 50 */
              "drive-aio",
              "pci-multibus",
              "pci-bootindex",
              "ccid-emulated",

              "ccid-passthru", /* 55 */
              "chardev-spicevmc",
              "device-spicevmc",
              "virtio-tx-alg",
              "device-qxl-vga",
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              "pci-multifunction", /* 60 */
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              "virtio-blk-pci.ioeventfd",
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              "sga",
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              "virtio-blk-pci.event_idx",
              "virtio-net-pci.event_idx",
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              "cache-directsync", /* 65 */
              "piix3-usb-uhci",
              "piix4-usb-uhci",
              "usb-ehci",
              "ich9-usb-ehci1",

              "vt82c686b-usb-uhci", /* 70 */
              "pci-ohci",
              "usb-redir",
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              "usb-hub",
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              "no-shutdown",
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              "cache-unsafe", /* 75 */
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              "rombar",
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              "ich9-ahci",
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              "no-acpi",
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              "fsdev-readonly",
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              "virtio-blk-pci.scsi", /* 80 */
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              "blk-sg-io",
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              "drive-copy-on-read",
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              "cpu-host",
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              "fsdev-writeout",
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              "drive-iotune", /* 85 */
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              "system_wakeup",
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              "scsi-disk.channel",
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              "scsi-block",
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              "transaction",
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              "block-job-sync", /* 90 */
              "block-job-async",
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              "scsi-cd",
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              "ide-cd",
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              "no-user-config",
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              "hda-micro", /* 95 */
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              "dump-guest-memory",
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              "nec-usb-xhci",
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              "virtio-s390",
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              "balloon-event",
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              "bridge", /* 100 */
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              "lsi",
              "virtio-scsi-pci",
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              "blockio",
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              "disable-s3",
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              "disable-s4", /* 105 */
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              "usb-redir.filter",
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              "ide-drive.wwn",
              "scsi-disk.wwn",
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              "seccomp-sandbox",
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              "reboot-timeout", /* 110 */
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              "dump-guest-core",
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              "seamless-migration",
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              "block-commit",
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              "vnc",
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              "drive-mirror", /* 115 */
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              "usb-redir.bootindex",
              "usb-host.bootindex",
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              "blockdev-snapshot-sync",
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              "qxl",

              "VGA", /* 120 */
              "cirrus-vga",
              "vmware-svga",
              "device-video-primary",
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              "s390-sclp",
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              "usb-serial", /* 125 */
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              "usb-net",
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              "add-fd",
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              "nbd-server",
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              "virtio-rng",

              "rng-random", /* 130 */
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              "rng-egd",
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              "virtio-ccw",
              "dtb",
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              "megasas",
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              "ipv6-migration", /* 135 */
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              "machine-opt",
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              "machine-usb-opt",
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              "tpm-passthrough",
              "tpm-tis",
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              "nvram",  /* 140 */
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              "pci-bridge",
              "vfio-pci",
              "vfio-pci.bootindex",
              "scsi-generic",

              "scsi-generic.bootindex", /* 145 */
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              "mem-merge",
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              "vnc-websocket",
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              "drive-discard",
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              "mlock",
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              "vnc-share-policy", /* 150 */
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    );

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struct _virQEMUCaps {
239 240
    virObject object;

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    bool usedQMP;

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    char *binary;
    time_t mtime;

246
    virBitmapPtr flags;
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    unsigned int version;
    unsigned int kvmVersion;

251
    virArch arch;
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    size_t ncpuDefinitions;
    char **cpuDefinitions;

    size_t nmachineTypes;
    char **machineTypes;
    char **machineAliases;
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};

261
struct _virQEMUCapsCache {
262 263
    virMutex lock;
    virHashTablePtr binaries;
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    char *libDir;
265
    char *runDir;
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    uid_t runUid;
    gid_t runGid;
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};

270

271 272
static virClassPtr virQEMUCapsClass;
static void virQEMUCapsDispose(void *obj);
273

274
static int virQEMUCapsOnceInit(void)
275
{
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    if (!(virQEMUCapsClass = virClassNew(virClassForObject(),
                                         "virQEMUCaps",
                                         sizeof(virQEMUCaps),
                                         virQEMUCapsDispose)))
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        return -1;

    return 0;
}

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VIR_ONCE_GLOBAL_INIT(virQEMUCaps)
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287
static virArch virQEMUCapsArchFromString(const char *arch)
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{
    if (STREQ(arch, "i386"))
        return VIR_ARCH_I686;
    if (STREQ(arch, "arm"))
        return VIR_ARCH_ARMV7L;

    return virArchFromString(arch);
}


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static const char *virQEMUCapsArchToString(virArch arch)
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{
    if (arch == VIR_ARCH_I686)
        return "i386";
    else if (arch == VIR_ARCH_ARMV7L)
        return "arm";

    return virArchToString(arch);
}


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static virCommandPtr
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virQEMUCapsProbeCommand(const char *qemu,
                        virQEMUCapsPtr qemuCaps,
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                        uid_t runUid, gid_t runGid)
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{
    virCommandPtr cmd = virCommandNew(qemu);

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    if (qemuCaps) {
        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_USER_CONFIG))
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            virCommandAddArg(cmd, "-no-user-config");
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        else if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_NODEFCONFIG))
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            virCommandAddArg(cmd, "-nodefconfig");
    }

    virCommandAddEnvPassCommon(cmd);
    virCommandClearCaps(cmd);
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    virCommandSetGID(cmd, runGid);
    virCommandSetUID(cmd, runUid);
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    return cmd;
}


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static void
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virQEMUCapsSetDefaultMachine(virQEMUCapsPtr qemuCaps,
                             size_t defIdx)
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{
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    char *name = qemuCaps->machineTypes[defIdx];
    char *alias = qemuCaps->machineAliases[defIdx];

    memmove(qemuCaps->machineTypes + 1,
            qemuCaps->machineTypes,
            sizeof(qemuCaps->machineTypes[0]) * defIdx);
    memmove(qemuCaps->machineAliases + 1,
            qemuCaps->machineAliases,
            sizeof(qemuCaps->machineAliases[0]) * defIdx);
    qemuCaps->machineTypes[0] = name;
    qemuCaps->machineAliases[0] = alias;
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}

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/* Format is:
 * <machine> <desc> [(default)|(alias of <canonical>)]
 */
static int
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virQEMUCapsParseMachineTypesStr(const char *output,
                                virQEMUCapsPtr qemuCaps)
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{
    const char *p = output;
    const char *next;
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    size_t defIdx = 0;
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    do {
        const char *t;
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        char *name;
        char *canonical = NULL;
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        if ((next = strchr(p, '\n')))
            ++next;

        if (STRPREFIX(p, "Supported machines are:"))
            continue;

        if (!(t = strchr(p, ' ')) || (next && t >= next))
            continue;

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        if (VIR_STRNDUP(name, p, t - p) < 0)
            return -1;
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        p = t;
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        if ((t = strstr(p, "(default)")) && (!next || t < next))
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            defIdx = qemuCaps->nmachineTypes;
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        if ((t = strstr(p, "(alias of ")) && (!next || t < next)) {
            p = t + strlen("(alias of ");
            if (!(t = strchr(p, ')')) || (next && t >= next))
                continue;

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            if (VIR_STRNDUP(canonical, p, t - p) < 0) {
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                VIR_FREE(name);
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                return -1;
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            }
        }

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        if (VIR_REALLOC_N(qemuCaps->machineTypes, qemuCaps->nmachineTypes + 1) < 0 ||
            VIR_REALLOC_N(qemuCaps->machineAliases, qemuCaps->nmachineTypes + 1) < 0) {
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            VIR_FREE(name);
            VIR_FREE(canonical);
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            virReportOOMError();
            return -1;
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        }
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        qemuCaps->nmachineTypes++;
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        if (canonical) {
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            qemuCaps->machineTypes[qemuCaps->nmachineTypes-1] = canonical;
            qemuCaps->machineAliases[qemuCaps->nmachineTypes-1] = name;
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        } else {
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            qemuCaps->machineTypes[qemuCaps->nmachineTypes-1] = name;
            qemuCaps->machineAliases[qemuCaps->nmachineTypes-1] = NULL;
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        }
    } while ((p = next));

409

410
    if (defIdx)
411
        virQEMUCapsSetDefaultMachine(qemuCaps, defIdx);
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    return 0;
}

416
static int
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virQEMUCapsProbeMachineTypes(virQEMUCapsPtr qemuCaps,
                             uid_t runUid, gid_t runGid)
419 420
{
    char *output;
421 422
    int ret = -1;
    virCommandPtr cmd;
423
    int status;
424

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    /* Make sure the binary we are about to try exec'ing exists.
     * Technically we could catch the exec() failure, but that's
     * in a sub-process so it's hard to feed back a useful error.
     */
429
    if (!virFileIsExecutable(qemuCaps->binary)) {
430
        virReportSystemError(errno, _("Cannot find QEMU binary %s"),
431
                             qemuCaps->binary);
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        return -1;
    }

435
    cmd = virQEMUCapsProbeCommand(qemuCaps->binary, qemuCaps, runUid, runGid);
436
    virCommandAddArgList(cmd, "-M", "?", NULL);
437
    virCommandSetOutputBuffer(cmd, &output);
438

439 440
    /* Ignore failure from older qemu that did not understand '-M ?'.  */
    if (virCommandRun(cmd, &status) < 0)
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        goto cleanup;

443
    if (virQEMUCapsParseMachineTypesStr(output, qemuCaps) < 0)
444
        goto cleanup;
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    ret = 0;

cleanup:
449 450
    VIR_FREE(output);
    virCommandFree(cmd);
451 452 453 454 455 456

    return ret;
}


typedef int
457 458
(*virQEMUCapsParseCPUModels)(const char *output,
                             virQEMUCapsPtr qemuCaps);
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/* Format:
 *      <arch> <model>
 * qemu-0.13 encloses some model names in []:
 *      <arch> [<model>]
 */
static int
466 467
virQEMUCapsParseX86Models(const char *output,
                          virQEMUCapsPtr qemuCaps)
468 469 470
{
    const char *p = output;
    const char *next;
471
    int ret = -1;
472 473 474

    do {
        const char *t;
475
        size_t len;
476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492

        if ((next = strchr(p, '\n')))
            next++;

        if (!(t = strchr(p, ' ')) || (next && t >= next))
            continue;

        if (!STRPREFIX(p, "x86"))
            continue;

        p = t;
        while (*p == ' ')
            p++;

        if (*p == '\0' || *p == '\n')
            continue;

493
        if (VIR_EXPAND_N(qemuCaps->cpuDefinitions, qemuCaps->ncpuDefinitions, 1) < 0) {
494 495 496
            virReportOOMError();
            goto cleanup;
        }
497

498 499 500 501
        if (next)
            len = next - p - 1;
        else
            len = strlen(p);
502

503 504 505 506
        if (len > 2 && *p == '[' && p[len - 1] == ']') {
            p++;
            len -= 2;
        }
507

508
        if (VIR_STRNDUP(qemuCaps->cpuDefinitions[qemuCaps->ncpuDefinitions - 1], p, len) < 0)
509
            goto cleanup;
510 511
    } while ((p = next));

512
    ret = 0;
513

514 515
cleanup:
    return ret;
516 517
}

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/* ppc64 parser.
 * Format : PowerPC <machine> <description>
 */
static int
522 523
virQEMUCapsParsePPCModels(const char *output,
                          virQEMUCapsPtr qemuCaps)
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Prerna Saxena 已提交
524 525 526
{
    const char *p = output;
    const char *next;
527
    int ret = -1;
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Prerna Saxena 已提交
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    do {
        const char *t;
531
        size_t len;
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Prerna Saxena 已提交
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        if ((next = strchr(p, '\n')))
            next++;

        if (!STRPREFIX(p, "PowerPC "))
            continue;

        /* Skip the preceding sub-string "PowerPC " */
        p += 8;

        /*Malformed string, does not obey the format 'PowerPC <model> <desc>'*/
        if (!(t = strchr(p, ' ')) || (next && t >= next))
            continue;

        if (*p == '\0')
            break;

        if (*p == '\n')
            continue;

552
        if (VIR_EXPAND_N(qemuCaps->cpuDefinitions, qemuCaps->ncpuDefinitions, 1) < 0) {
553 554 555
            virReportOOMError();
            goto cleanup;
        }
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Prerna Saxena 已提交
556

557
        len = t - p - 1;
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558

559
        if (VIR_STRNDUP(qemuCaps->cpuDefinitions[qemuCaps->ncpuDefinitions - 1], p, len) < 0)
560
            goto cleanup;
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561 562
    } while ((p = next));

563
    ret = 0;
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564

565 566
cleanup:
    return ret;
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Prerna Saxena 已提交
567
}
568

569
static int
570
virQEMUCapsProbeCPUModels(virQEMUCapsPtr qemuCaps, uid_t runUid, gid_t runGid)
571 572 573
{
    char *output = NULL;
    int ret = -1;
574
    virQEMUCapsParseCPUModels parse;
575
    virCommandPtr cmd;
576

577 578 579 580 581
    if (qemuCaps->arch == VIR_ARCH_I686 ||
        qemuCaps->arch == VIR_ARCH_X86_64)
        parse = virQEMUCapsParseX86Models;
    else if (qemuCaps->arch == VIR_ARCH_PPC64)
        parse = virQEMUCapsParsePPCModels;
582
    else {
583
        VIR_DEBUG("don't know how to parse %s CPU models",
584
                  virArchToString(qemuCaps->arch));
585 586 587
        return 0;
    }

588
    cmd = virQEMUCapsProbeCommand(qemuCaps->binary, qemuCaps, runUid, runGid);
589
    virCommandAddArgList(cmd, "-cpu", "?", NULL);
590
    virCommandSetOutputBuffer(cmd, &output);
591

592
    if (virCommandRun(cmd, NULL) < 0)
593 594
        goto cleanup;

595
    if (parse(output, qemuCaps) < 0)
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        goto cleanup;

    ret = 0;

cleanup:
    VIR_FREE(output);
602
    virCommandFree(cmd);
603 604 605 606 607

    return ret;
}


608
static char *
609 610
virQEMUCapsFindBinaryForArch(virArch hostarch,
                             virArch guestarch)
611 612
{
    char *ret;
613
    const char *archstr = virQEMUCapsArchToString(guestarch);
614
    char *binary;
615

616 617 618 619 620 621 622 623 624 625 626 627 628 629
    if (virAsprintf(&binary, "qemu-system-%s", archstr) < 0) {
        virReportOOMError();
        return NULL;
    }

    ret = virFindFileInPath(binary);
    VIR_FREE(binary);
    if (ret && !virFileIsExecutable(ret))
        VIR_FREE(ret);

    if (guestarch == VIR_ARCH_I686 &&
        !ret &&
        hostarch == VIR_ARCH_X86_64) {
        ret = virFindFileInPath("qemu-system-x86_64");
630 631
        if (ret && !virFileIsExecutable(ret))
            VIR_FREE(ret);
632
    }
633

634 635 636 637 638
    if (guestarch == VIR_ARCH_I686 &&
        !ret) {
        ret = virFindFileInPath("qemu");
        if (ret && !virFileIsExecutable(ret))
            VIR_FREE(ret);
639
    }
640

641 642 643 644 645
    return ret;
}


static bool
646 647
virQEMUCapsIsValidForKVM(virArch hostarch,
                         virArch guestarch)
648
{
649
    if (hostarch == guestarch)
650
        return true;
651 652
    if (hostarch == VIR_ARCH_X86_64 &&
        guestarch == VIR_ARCH_I686)
653 654 655 656
        return true;
    return false;
}

657
static int
658 659 660 661
virQEMUCapsInitGuest(virCapsPtr caps,
                     virQEMUCapsCachePtr cache,
                     virArch hostarch,
                     virArch guestarch)
662 663 664
{
    virCapsGuestPtr guest;
    int i;
665 666
    bool haskvm = false;
    bool haskqemu = false;
667 668 669
    char *kvmbin = NULL;
    char *binary = NULL;
    virCapsGuestMachinePtr *machines = NULL;
670
    size_t nmachines = 0;
671 672
    virQEMUCapsPtr qemubinCaps = NULL;
    virQEMUCapsPtr kvmbinCaps = NULL;
673 674
    int ret = -1;

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    /* Check for existence of base emulator, or alternate base
676 677
     * which can be used with magic cpu choice
     */
678
    binary = virQEMUCapsFindBinaryForArch(hostarch, guestarch);
679

680
    /* Ignore binary if extracting version info fails */
681
    if (binary) {
682
        if (!(qemubinCaps = virQEMUCapsCacheLookup(cache, binary))) {
683 684 685 686
            virResetLastError();
            VIR_FREE(binary);
        }
    }
687 688

    /* qemu-kvm/kvm binaries can only be used if
689 690 691 692 693
     *  - host & guest arches match
     * Or
     *  - hostarch is x86_64 and guest arch is i686
     * The latter simply needs "-cpu qemu32"
     */
694
    if (virQEMUCapsIsValidForKVM(hostarch, guestarch)) {
695 696 697
        const char *const kvmbins[] = { "/usr/libexec/qemu-kvm", /* RHEL */
                                        "qemu-kvm", /* Fedora */
                                        "kvm" }; /* Upstream .spec */
698

699 700
        for (i = 0; i < ARRAY_CARDINALITY(kvmbins); ++i) {
            kvmbin = virFindFileInPath(kvmbins[i]);
701

702 703
            if (!kvmbin)
                continue;
704

705
            if (!(kvmbinCaps = virQEMUCapsCacheLookup(cache, kvmbin))) {
706
                virResetLastError();
707 708 709
                VIR_FREE(kvmbin);
                continue;
            }
710

711 712
            if (!binary) {
                binary = kvmbin;
713
                qemubinCaps = kvmbinCaps;
714
                kvmbin = NULL;
715
                kvmbinCaps = NULL;
716
            }
717
            break;
718 719 720 721 722 723
        }
    }

    if (!binary)
        return 0;

724
    if (access("/dev/kvm", F_OK) == 0 &&
725 726
        (virQEMUCapsGet(qemubinCaps, QEMU_CAPS_KVM) ||
         virQEMUCapsGet(qemubinCaps, QEMU_CAPS_ENABLE_KVM) ||
727
         kvmbin))
728
        haskvm = true;
729 730

    if (access("/dev/kqemu", F_OK) == 0 &&
731
        virQEMUCapsGet(qemubinCaps, QEMU_CAPS_KQEMU))
732
        haskqemu = true;
J
Jiri Denemark 已提交
733

734
    if (virQEMUCapsGetMachineTypesCaps(qemubinCaps, &nmachines, &machines) < 0)
D
Daniel P. Berrange 已提交
735
        goto error;
736 737 738 739

    /* We register kvm as the base emulator too, since we can
     * just give -no-kvm to disable acceleration if required */
    if ((guest = virCapabilitiesAddGuest(caps,
D
Daniel P. Berrange 已提交
740
                                         "hvm",
741
                                         guestarch,
742 743 744 745 746 747 748 749 750 751
                                         binary,
                                         NULL,
                                         nmachines,
                                         machines)) == NULL)
        goto error;

    machines = NULL;
    nmachines = 0;

    if (caps->host.cpu &&
J
Jiri Denemark 已提交
752
        caps->host.cpu->model &&
753
        virQEMUCapsGetCPUDefinitions(qemubinCaps, NULL) > 0 &&
754 755 756
        !virCapabilitiesAddGuestFeature(guest, "cpuselection", 1, 0))
        goto error;

757
    if (virQEMUCapsGet(qemubinCaps, QEMU_CAPS_BOOTINDEX) &&
J
Jiri Denemark 已提交
758
        !virCapabilitiesAddGuestFeature(guest, "deviceboot", 1, 0))
759 760
        goto error;

D
Daniel P. Berrange 已提交
761 762 763 764 765 766 767
    if (virCapabilitiesAddGuestDomain(guest,
                                      "qemu",
                                      NULL,
                                      NULL,
                                      0,
                                      NULL) == NULL)
        goto error;
768

D
Daniel P. Berrange 已提交
769 770 771 772 773 774 775 776
    if (haskqemu &&
        virCapabilitiesAddGuestDomain(guest,
                                      "kqemu",
                                      NULL,
                                      NULL,
                                      0,
                                      NULL) == NULL)
        goto error;
777

D
Daniel P. Berrange 已提交
778 779
    if (haskvm) {
        virCapsGuestDomainPtr dom;
780

D
Daniel P. Berrange 已提交
781
        if (kvmbin &&
782
            virQEMUCapsGetMachineTypesCaps(kvmbinCaps, &nmachines, &machines) < 0)
D
Daniel P. Berrange 已提交
783
            goto error;
784

D
Daniel P. Berrange 已提交
785 786 787 788 789 790 791 792
        if ((dom = virCapabilitiesAddGuestDomain(guest,
                                                 "kvm",
                                                 kvmbin ? kvmbin : binary,
                                                 NULL,
                                                 nmachines,
                                                 machines)) == NULL) {
            goto error;
        }
793

D
Daniel P. Berrange 已提交
794 795
        machines = NULL;
        nmachines = 0;
796 797 798

    }

799 800
    if (((guestarch == VIR_ARCH_I686) ||
         (guestarch == VIR_ARCH_X86_64)) &&
801 802 803 804
        (virCapabilitiesAddGuestFeature(guest, "acpi", 1, 1) == NULL ||
         virCapabilitiesAddGuestFeature(guest, "apic", 1, 0) == NULL))
        goto error;

805
    if ((guestarch == VIR_ARCH_I686) &&
806 807 808
        (virCapabilitiesAddGuestFeature(guest, "pae", 1, 0) == NULL ||
         virCapabilitiesAddGuestFeature(guest, "nonpae", 1, 0) == NULL))
        goto error;
809 810 811 812

    ret = 0;

cleanup:
813 814
    VIR_FREE(binary);
    VIR_FREE(kvmbin);
815 816
    virObjectUnref(qemubinCaps);
    virObjectUnref(kvmbinCaps);
817 818 819 820 821 822 823 824 825 826 827

    return ret;

error:
    virCapabilitiesFreeMachines(machines, nmachines);

    goto cleanup;
}


static int
828 829
virQEMUCapsInitCPU(virCapsPtr caps,
                   virArch arch)
830 831 832 833 834 835
{
    virCPUDefPtr cpu = NULL;
    union cpuData *data = NULL;
    virNodeInfo nodeinfo;
    int ret = -1;

836
    if (VIR_ALLOC(cpu) < 0) {
837 838 839 840
        virReportOOMError();
        goto error;
    }

841 842
    cpu->arch = arch;

843
    if (nodeGetInfo(&nodeinfo))
844 845 846 847 848 849
        goto error;

    cpu->type = VIR_CPU_TYPE_HOST;
    cpu->sockets = nodeinfo.sockets;
    cpu->cores = nodeinfo.cores;
    cpu->threads = nodeinfo.threads;
J
Jiri Denemark 已提交
850
    caps->host.cpu = cpu;
851

852
    if (!(data = cpuNodeData(arch))
853
        || cpuDecode(cpu, data, NULL, 0, NULL) < 0)
J
Jiri Denemark 已提交
854
        goto cleanup;
855 856 857 858

    ret = 0;

cleanup:
859
    cpuDataFree(arch, data);
860 861 862 863 864 865 866 867 868

    return ret;

error:
    virCPUDefFree(cpu);
    goto cleanup;
}


869
virCapsPtr virQEMUCapsInit(virQEMUCapsCachePtr cache)
870 871 872
{
    virCapsPtr caps;
    int i;
T
Tal Kain 已提交
873
    virArch hostarch = virArchFromHost();
874

T
Tal Kain 已提交
875
    if ((caps = virCapabilitiesNew(hostarch,
876
                                   1, 1)) == NULL)
877
        goto error;
878 879 880 881 882 883 884

    /* Some machines have problematic NUMA toplogy causing
     * unexpected failures. We don't want to break the QEMU
     * driver in this scenario, so log errors & carry on
     */
    if (nodeCapsInitNUMA(caps) < 0) {
        virCapabilitiesFreeNUMAInfo(caps);
885
        VIR_WARN("Failed to query host NUMA topology, disabling NUMA capabilities");
886 887
    }

T
Tal Kain 已提交
888
    if (virQEMUCapsInitCPU(caps, hostarch) < 0)
889
        VIR_WARN("Failed to get host CPU");
890

891 892
    /* Add the power management features of the host */

893
    if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
894 895
        VIR_WARN("Failed to get host power management capabilities");

896 897 898
    virCapabilitiesAddHostMigrateTransport(caps,
                                           "tcp");

899 900 901 902
    /* QEMU can support pretty much every arch that exists,
     * so just probe for them all - we gracefully fail
     * if a qemu-system-$ARCH binary can't be found
     */
903
    for (i = 0; i < VIR_ARCH_LAST; i++)
904
        if (virQEMUCapsInitGuest(caps, cache,
T
Tal Kain 已提交
905
                                 hostarch,
906
                                 i) < 0)
907
            goto error;
908 909 910

    return caps;

911
error:
912
    virObjectUnref(caps);
913 914 915 916
    return NULL;
}


917
static int
918 919
virQEMUCapsComputeCmdFlags(const char *help,
                           unsigned int version,
920
                           bool is_kvm,
921 922 923
                           unsigned int kvm_version,
                           virQEMUCapsPtr qemuCaps,
                           bool check_yajl ATTRIBUTE_UNUSED)
924 925
{
    const char *p;
R
Richa Marwaha 已提交
926
    const char *fsdev, *netdev;
927 928

    if (strstr(help, "-no-kqemu"))
929
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_KQEMU);
930
    if (strstr(help, "-enable-kqemu"))
931
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_ENABLE_KQEMU);
932
    if (strstr(help, "-no-kvm"))
933
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_KVM);
934
    if (strstr(help, "-enable-kvm"))
935
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_ENABLE_KVM);
936
    if (strstr(help, "-no-reboot"))
937
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_REBOOT);
938
    if (strstr(help, "-name")) {
939
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NAME);
940
        if (strstr(help, ",process="))
941
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_NAME_PROCESS);
942 943
    }
    if (strstr(help, "-uuid"))
944
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_UUID);
945
    if (strstr(help, "-xen-domid"))
946
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_XEN_DOMID);
947
    else if (strstr(help, "-domid"))
948
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DOMID);
949
    if (strstr(help, "-drive")) {
950 951
        const char *cache = strstr(help, "cache=");

952
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE);
953 954
        if (cache && (p = strchr(cache, ']'))) {
            if (memmem(cache, p - cache, "on|off", sizeof("on|off") - 1) == NULL)
955
                virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_V2);
956
            if (memmem(cache, p - cache, "directsync", sizeof("directsync") - 1))
957
                virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_DIRECTSYNC);
958
            if (memmem(cache, p - cache, "unsafe", sizeof("unsafe") - 1))
959
                virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_UNSAFE);
960
        }
961
        if (strstr(help, "format="))
962
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_FORMAT);
963
        if (strstr(help, "readonly="))
964
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_READONLY);
965
        if (strstr(help, "aio=threads|native"))
966
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_AIO);
O
Osier Yang 已提交
967
        if (strstr(help, "copy-on-read=on|off"))
968
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_COPY_ON_READ);
969
        if (strstr(help, "bps="))
970
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_IOTUNE);
971 972 973 974
    }
    if ((p = strstr(help, "-vga")) && !strstr(help, "-std-vga")) {
        const char *nl = strstr(p, "\n");

975
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA);
976 977

        if (strstr(p, "|qxl"))
978
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA_QXL);
979
        if ((p = strstr(p, "|none")) && p < nl)
980
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA_NONE);
981 982
    }
    if (strstr(help, "-spice"))
983
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SPICE);
984
    if (strstr(help, "-vnc"))
985
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC);
986
    if (strstr(help, "seamless-migration="))
987
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SEAMLESS_MIGRATION);
988
    if (strstr(help, "boot=on"))
989
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_BOOT);
990
    if (strstr(help, "serial=s"))
991
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_SERIAL);
992
    if (strstr(help, "-pcidevice"))
993
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCIDEVICE);
994
    if (strstr(help, "-mem-path"))
995
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MEM_PATH);
996
    if (strstr(help, "-chardev")) {
997
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_CHARDEV);
998
        if (strstr(help, "-chardev spicevmc"))
999
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_CHARDEV_SPICEVMC);
1000
    }
1001
    if (strstr(help, "-balloon"))
1002
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_BALLOON);
1003
    if (strstr(help, "-device")) {
1004
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE);
1005 1006 1007 1008
        /*
         * When -device was introduced, qemu already supported drive's
         * readonly option but didn't advertise that.
         */
1009
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_READONLY);
1010 1011
    }
    if (strstr(help, "-nodefconfig"))
1012
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NODEFCONFIG);
1013
    if (strstr(help, "-no-user-config"))
1014
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_USER_CONFIG);
1015 1016
    /* The trailing ' ' is important to avoid a bogus match */
    if (strstr(help, "-rtc "))
1017
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_RTC);
1018 1019
    /* to wit */
    if (strstr(help, "-rtc-td-hack"))
1020
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_RTC_TD_HACK);
1021
    if (strstr(help, "-no-hpet"))
1022
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_HPET);
1023
    if (strstr(help, "-no-acpi"))
1024
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_ACPI);
1025
    if (strstr(help, "-no-kvm-pit-reinjection"))
1026
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_KVM_PIT);
1027
    if (strstr(help, "-tdf"))
1028
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_TDF);
1029
    if (strstr(help, "-enable-nesting"))
1030
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NESTING);
1031
    if (strstr(help, ",menu=on"))
1032
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_BOOT_MENU);
1033
    if (strstr(help, ",reboot-timeout=rb_time"))
1034
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_REBOOT_TIMEOUT);
1035
    if ((fsdev = strstr(help, "-fsdev"))) {
1036
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV);
1037
        if (strstr(fsdev, "readonly"))
1038
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_READONLY);
1039
        if (strstr(fsdev, "writeout"))
1040
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_WRITEOUT);
1041
    }
1042
    if (strstr(help, "-smbios type"))
1043
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SMBIOS_TYPE);
1044
    if (strstr(help, "-sandbox"))
1045
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SECCOMP_SANDBOX);
1046

R
Richa Marwaha 已提交
1047
    if ((netdev = strstr(help, "-netdev"))) {
1048 1049
        /* Disable -netdev on 0.12 since although it exists,
         * the corresponding netdev_add/remove monitor commands
1050 1051
         * do not, and we need them to be able to do hotplug.
         * But see below about RHEL build. */
R
Richa Marwaha 已提交
1052 1053
        if (version >= 13000) {
            if (strstr(netdev, "bridge"))
1054 1055
                virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV_BRIDGE);
           virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV);
R
Richa Marwaha 已提交
1056
        }
1057 1058 1059
    }

    if (strstr(help, "-sdl"))
1060
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SDL);
1061 1062 1063
    if (strstr(help, "cores=") &&
        strstr(help, "threads=") &&
        strstr(help, "sockets="))
1064
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_SMP_TOPOLOGY);
1065 1066

    if (version >= 9000)
1067
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC_COLON);
1068 1069

    if (is_kvm && (version >= 10000 || kvm_version >= 74))
1070
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNET_HDR);
1071

1072
    if (strstr(help, ",vhost=")) {
1073
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VHOST_NET);
1074 1075
    }

1076 1077
    /* Do not use -no-shutdown if qemu doesn't support it or SIGTERM handling
     * is most likely buggy when used with -no-shutdown (which applies for qemu
1078
     * 0.14.* and 0.15.0)
1079
     */
1080
    if (strstr(help, "-no-shutdown") && (version < 14000 || version > 15000))
1081
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_SHUTDOWN);
1082

1083
    if (strstr(help, "dump-guest-core=on|off"))
1084
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE);
1085

O
Olivia Yin 已提交
1086 1087 1088
    if (strstr(help, "-dtb"))
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DTB);

1089 1090 1091
    if (strstr(help, "-machine"))
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_OPT);

L
Li Zhang 已提交
1092 1093 1094 1095
     /* USB option is supported v1.3.0 onwards */
    if (qemuCaps->version >= 1003000)
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_USB_OPT);

1096 1097 1098 1099
    /*
     * Handling of -incoming arg with varying features
     *  -incoming tcp    (kvm >= 79, qemu >= 0.10.0)
     *  -incoming exec   (kvm >= 80, qemu >= 0.10.0)
1100 1101
     *  -incoming unix   (qemu >= 0.12.0)
     *  -incoming fd     (qemu >= 0.12.0)
1102 1103 1104 1105 1106 1107 1108
     *  -incoming stdio  (all earlier kvm)
     *
     * NB, there was a pre-kvm-79 'tcp' support, but it
     * was broken, because it blocked the monitor console
     * while waiting for data, so pretend it doesn't exist
     */
    if (version >= 10000) {
1109 1110
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_TCP);
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC);
1111
        if (version >= 12000) {
1112 1113
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX);
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD);
1114
        }
1115
    } else if (kvm_version >= 79) {
1116
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_TCP);
1117
        if (kvm_version >= 80)
1118
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC);
1119
    } else if (kvm_version > 0) {
1120
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_KVM_STDIO);
1121 1122 1123
    }

    if (version >= 10000)
1124
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_0_10);
1125

1126
    if (version >= 11000)
1127
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VIRTIO_BLK_SG_IO);
1128

1129 1130 1131
    /* While JSON mode was available in 0.12.0, it was too
     * incomplete to contemplate using. The 0.13.0 release
     * is good enough to use, even though it lacks one or
1132 1133 1134 1135 1136
     * two features. This is also true of versions of qemu
     * built for RHEL, labeled 0.12.1, but with extra text
     * in the help output that mentions that features were
     * backported for libvirt. The benefits of JSON mode now
     * outweigh the downside.
1137
     */
1138
#if WITH_YAJL
1139
    if (version >= 13000) {
1140
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MONITOR_JSON);
1141 1142
    } else if (version >= 12000 &&
               strstr(help, "libvirt")) {
1143 1144
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MONITOR_JSON);
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV);
1145
    }
1146 1147 1148 1149 1150 1151 1152
#else
    /* Starting with qemu 0.15 and newer, upstream qemu no longer
     * promises to keep the human interface stable, but requests that
     * we use QMP (the JSON interface) for everything.  If the user
     * forgot to include YAJL libraries when building their own
     * libvirt but is targetting a newer qemu, we are better off
     * telling them to recompile (the spec file includes the
1153
     * dependency, so distros won't hit this).  This check is
1154
     * also in m4/virt-yajl.m4 (see $with_yajl).  */
1155 1156 1157
    if (version >= 15000 ||
        (version >= 12000 && strstr(help, "libvirt"))) {
        if (check_yajl) {
1158 1159 1160
            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                           _("this qemu binary requires libvirt to be "
                             "compiled with yajl"));
1161 1162
            return -1;
        }
1163
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV);
1164
    }
E
Eric Blake 已提交
1165
#endif
1166 1167

    if (version >= 13000)
1168
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCI_MULTIFUNCTION);
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180

    /* Although very new versions of qemu advertise the presence of
     * the rombar option in the output of "qemu -device pci-assign,?",
     * this advertisement was added to the code long after the option
     * itself. According to qemu developers, though, rombar is
     * available in all qemu binaries from release 0.12 onward.
     * Setting the capability this way makes it available in more
     * cases where it might be needed, and shouldn't cause any false
     * positives (in the case that it did, qemu would produce an error
     * log and refuse to start, so it would be immediately obvious).
     */
    if (version >= 12000)
1181
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCI_ROMBAR);
1182 1183

    if (version >= 11000)
1184
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_HOST);
1185

1186
    if (version >= 1001000) {
J
Ján Tomko 已提交
1187
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_IPV6_MIGRATION);
1188 1189
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC_SHARE_POLICY);
    }
J
Ján Tomko 已提交
1190

1191
    if (version >= 1002000)
1192
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_VIDEO_PRIMARY);
1193
    return 0;
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
}

/* We parse the output of 'qemu -help' to get the QEMU
 * version number. The first bit is easy, just parse
 * 'QEMU PC emulator version x.y.z'
 * or
 * 'QEMU emulator version x.y.z'.
 *
 * With qemu-kvm, however, that is followed by a string
 * in parenthesis as follows:
 *  - qemu-kvm-x.y.z in stable releases
 *  - kvm-XX for kvm versions up to kvm-85
 *  - qemu-kvm-devel-XX for kvm version kvm-86 and later
 *
 * For qemu-kvm versions before 0.10.z, we need to detect
 * the KVM version number for some features. With 0.10.z
 * and later, we just need the QEMU version number and
 * whether it is KVM QEMU or mainline QEMU.
 */
#define QEMU_VERSION_STR_1  "QEMU emulator version"
#define QEMU_VERSION_STR_2  "QEMU PC emulator version"
#define QEMU_KVM_VER_PREFIX "(qemu-kvm-"
#define KVM_VER_PREFIX      "(kvm-"

#define SKIP_BLANKS(p) do { while ((*(p) == ' ') || (*(p) == '\t')) (p)++; } while (0)

1220 1221 1222 1223
int virQEMUCapsParseHelpStr(const char *qemu,
                            const char *help,
                            virQEMUCapsPtr qemuCaps,
                            unsigned int *version,
1224
                            bool *is_kvm,
1225 1226
                            unsigned int *kvm_version,
                            bool check_yajl)
1227 1228 1229
{
    unsigned major, minor, micro;
    const char *p = help;
1230
    char *strflags;
1231

1232 1233
    *version = *kvm_version = 0;
    *is_kvm = false;
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250

    if (STRPREFIX(p, QEMU_VERSION_STR_1))
        p += strlen(QEMU_VERSION_STR_1);
    else if (STRPREFIX(p, QEMU_VERSION_STR_2))
        p += strlen(QEMU_VERSION_STR_2);
    else
        goto fail;

    SKIP_BLANKS(p);

    major = virParseNumber(&p);
    if (major == -1 || *p != '.')
        goto fail;

    ++p;

    minor = virParseNumber(&p);
J
Jiri Denemark 已提交
1251
    if (minor == -1)
1252 1253
        goto fail;

J
Jiri Denemark 已提交
1254 1255 1256 1257 1258 1259 1260 1261
    if (*p != '.') {
        micro = 0;
    } else {
        ++p;
        micro = virParseNumber(&p);
        if (micro == -1)
            goto fail;
    }
1262 1263 1264 1265

    SKIP_BLANKS(p);

    if (STRPREFIX(p, QEMU_KVM_VER_PREFIX)) {
1266
        *is_kvm = true;
1267 1268 1269 1270
        p += strlen(QEMU_KVM_VER_PREFIX);
    } else if (STRPREFIX(p, KVM_VER_PREFIX)) {
        int ret;

1271
        *is_kvm = true;
1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282
        p += strlen(KVM_VER_PREFIX);

        ret = virParseNumber(&p);
        if (ret == -1)
            goto fail;

        *kvm_version = ret;
    }

    *version = (major * 1000 * 1000) + (minor * 1000) + micro;

1283 1284
    if (virQEMUCapsComputeCmdFlags(help, *version, *is_kvm, *kvm_version,
                                   qemuCaps, check_yajl) < 0)
1285
        goto cleanup;
1286

1287
    strflags = virBitmapString(qemuCaps->flags);
1288 1289 1290
    VIR_DEBUG("Version %u.%u.%u, cooked version %u, flags %s",
              major, minor, micro, *version, NULLSTR(strflags));
    VIR_FREE(strflags);
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300

    if (*kvm_version)
        VIR_DEBUG("KVM version %d detected", *kvm_version);
    else if (*is_kvm)
        VIR_DEBUG("qemu-kvm version %u.%u.%u detected", major, minor, micro);

    return 0;

fail:
    p = strchr(help, '\n');
1301 1302
    if (!p)
        p = strchr(help, '\0');
1303

1304 1305 1306
    virReportError(VIR_ERR_INTERNAL_ERROR,
                   _("cannot parse %s version number in '%.*s'"),
                   qemu, (int) (p - help), help);
1307

1308
cleanup:
1309 1310 1311
    return -1;
}

1312

1313
struct virQEMUCapsStringFlags {
1314 1315 1316 1317 1318
    const char *value;
    int flag;
};


1319
struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
    { "hda-duplex", QEMU_CAPS_HDA_DUPLEX },
    { "hda-micro", QEMU_CAPS_HDA_MICRO },
    { "ccid-card-emulated", QEMU_CAPS_CCID_EMULATED },
    { "ccid-card-passthru", QEMU_CAPS_CCID_PASSTHRU },
    { "piix3-usb-uhci", QEMU_CAPS_PIIX3_USB_UHCI },
    { "piix4-usb-uhci", QEMU_CAPS_PIIX4_USB_UHCI },
    { "usb-ehci", QEMU_CAPS_USB_EHCI },
    { "ich9-usb-ehci1", QEMU_CAPS_ICH9_USB_EHCI1 },
    { "vt82c686b-usb-uhci", QEMU_CAPS_VT82C686B_USB_UHCI },
    { "pci-ohci", QEMU_CAPS_PCI_OHCI },
    { "nec-usb-xhci", QEMU_CAPS_NEC_USB_XHCI },
    { "usb-redir", QEMU_CAPS_USB_REDIR },
    { "usb-hub", QEMU_CAPS_USB_HUB },
    { "ich9-ahci", QEMU_CAPS_ICH9_AHCI },
    { "virtio-blk-s390", QEMU_CAPS_VIRTIO_S390 },
1335
    { "virtio-blk-ccw", QEMU_CAPS_VIRTIO_CCW },
1336
    { "sclpconsole", QEMU_CAPS_SCLP_S390 },
1337
    { "lsi53c895a", QEMU_CAPS_SCSI_LSI },
1338
    { "virtio-scsi-pci", QEMU_CAPS_VIRTIO_SCSI },
1339 1340
    { "virtio-scsi-s390", QEMU_CAPS_VIRTIO_SCSI },
    { "virtio-scsi-ccw", QEMU_CAPS_VIRTIO_SCSI },
1341
    { "megasas", QEMU_CAPS_SCSI_MEGASAS },
1342 1343
    { "spicevmc", QEMU_CAPS_DEVICE_SPICEVMC },
    { "qxl-vga", QEMU_CAPS_DEVICE_QXL_VGA },
1344
    { "qxl", QEMU_CAPS_DEVICE_QXL },
1345 1346 1347 1348
    { "sga", QEMU_CAPS_SGA },
    { "scsi-block", QEMU_CAPS_SCSI_BLOCK },
    { "scsi-cd", QEMU_CAPS_SCSI_CD },
    { "ide-cd", QEMU_CAPS_IDE_CD },
1349 1350 1351
    { "VGA", QEMU_CAPS_DEVICE_VGA },
    { "cirrus-vga", QEMU_CAPS_DEVICE_CIRRUS_VGA },
    { "vmware-svga", QEMU_CAPS_DEVICE_VMWARE_SVGA },
H
Han Cheng 已提交
1352 1353
    { "usb-serial", QEMU_CAPS_DEVICE_USB_SERIAL },
    { "usb-net", QEMU_CAPS_DEVICE_USB_NET },
1354
    { "virtio-rng-pci", QEMU_CAPS_DEVICE_VIRTIO_RNG },
1355 1356
    { "virtio-rng-s390", QEMU_CAPS_DEVICE_VIRTIO_RNG },
    { "virtio-rng-ccw", QEMU_CAPS_DEVICE_VIRTIO_RNG },
1357
    { "rng-random", QEMU_CAPS_OBJECT_RNG_RANDOM },
1358
    { "rng-egd", QEMU_CAPS_OBJECT_RNG_EGD },
1359
    { "spapr-nvram", QEMU_CAPS_DEVICE_NVRAM },
1360
    { "pci-bridge", QEMU_CAPS_DEVICE_PCI_BRIDGE },
1361
    { "vfio-pci", QEMU_CAPS_DEVICE_VFIO_PCI },
H
Han Cheng 已提交
1362
    { "scsi-generic", QEMU_CAPS_DEVICE_SCSI_GENERIC },
1363 1364
};

1365
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBlk[] = {
1366 1367 1368 1369 1370 1371 1372 1373
    { "multifunction", QEMU_CAPS_PCI_MULTIFUNCTION },
    { "bootindex", QEMU_CAPS_BOOTINDEX },
    { "ioeventfd", QEMU_CAPS_VIRTIO_IOEVENTFD },
    { "event_idx", QEMU_CAPS_VIRTIO_BLK_EVENT_IDX },
    { "scsi", QEMU_CAPS_VIRTIO_BLK_SCSI },
    { "logical_block_size", QEMU_CAPS_BLOCKIO },
};

1374
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioNet[] = {
1375 1376 1377 1378
    { "tx", QEMU_CAPS_VIRTIO_TX_ALG },
    { "event_idx", QEMU_CAPS_VIRTIO_NET_EVENT_IDX },
};

1379
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsPciAssign[] = {
1380
    { "rombar", QEMU_CAPS_PCI_ROMBAR },
1381 1382 1383 1384
    { "configfd", QEMU_CAPS_PCI_CONFIGFD },
    { "bootindex", QEMU_CAPS_PCI_BOOTINDEX },
};

1385 1386 1387 1388
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVfioPci[] = {
    { "bootindex", QEMU_CAPS_VFIO_PCI_BOOTINDEX },
};

1389
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsScsiDisk[] = {
1390 1391 1392 1393
    { "channel", QEMU_CAPS_SCSI_DISK_CHANNEL },
    { "wwn", QEMU_CAPS_SCSI_DISK_WWN },
};

1394
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIDEDrive[] = {
1395 1396 1397
    { "wwn", QEMU_CAPS_IDE_DRIVE_WWN },
};

1398
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsPixx4PM[] = {
1399 1400 1401 1402
    { "disable_s3", QEMU_CAPS_DISABLE_S3 },
    { "disable_s4", QEMU_CAPS_DISABLE_S4 },
};

1403
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUsbRedir[] = {
1404
    { "filter", QEMU_CAPS_USB_REDIR_FILTER },
1405 1406 1407
    { "bootindex", QEMU_CAPS_USB_REDIR_BOOTINDEX },
};

1408
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUsbHost[] = {
1409
    { "bootindex", QEMU_CAPS_USB_HOST_BOOTINDEX },
1410 1411
};

H
Han Cheng 已提交
1412 1413 1414 1415
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsScsiGeneric[] = {
    { "bootindex", QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX },
};

1416
struct virQEMUCapsObjectTypeProps {
1417
    const char *type;
1418
    struct virQEMUCapsStringFlags *props;
1419 1420 1421
    size_t nprops;
};

1422 1423 1424 1425
static struct virQEMUCapsObjectTypeProps virQEMUCapsObjectProps[] = {
    { "virtio-blk-pci", virQEMUCapsObjectPropsVirtioBlk,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioBlk) },
    { "virtio-net-pci", virQEMUCapsObjectPropsVirtioNet,
1426 1427 1428 1429
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioNet) },
    { "virtio-blk-ccw", virQEMUCapsObjectPropsVirtioBlk,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioBlk) },
    { "virtio-net-ccw", virQEMUCapsObjectPropsVirtioNet,
1430 1431 1432 1433 1434 1435 1436 1437 1438
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioNet) },
    { "virtio-blk-s390", virQEMUCapsObjectPropsVirtioBlk,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioBlk) },
    { "virtio-net-s390", virQEMUCapsObjectPropsVirtioNet,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVirtioNet) },
    { "pci-assign", virQEMUCapsObjectPropsPciAssign,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsPciAssign) },
    { "kvm-pci-assign", virQEMUCapsObjectPropsPciAssign,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsPciAssign) },
1439 1440
    { "vfio-pci", virQEMUCapsObjectPropsVfioPci,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsVfioPci) },
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450
    { "scsi-disk", virQEMUCapsObjectPropsScsiDisk,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsScsiDisk) },
    { "ide-drive", virQEMUCapsObjectPropsIDEDrive,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsIDEDrive) },
    { "PIIX4_PM", virQEMUCapsObjectPropsPixx4PM,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsPixx4PM) },
    { "usb-redir", virQEMUCapsObjectPropsUsbRedir,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsUsbRedir) },
    { "usb-host", virQEMUCapsObjectPropsUsbHost,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsUsbHost) },
H
Han Cheng 已提交
1451 1452
    { "scsi-generic", virQEMUCapsObjectPropsScsiGeneric,
      ARRAY_CARDINALITY(virQEMUCapsObjectPropsScsiGeneric) },
1453 1454 1455 1456
};


static void
1457 1458 1459 1460 1461
virQEMUCapsProcessStringFlags(virQEMUCapsPtr qemuCaps,
                              size_t nflags,
                              struct virQEMUCapsStringFlags *flags,
                              size_t nvalues,
                              char *const*values)
1462 1463
{
    size_t i, j;
1464 1465
    for (i = 0; i < nflags; i++) {
        for (j = 0; j < nvalues; j++) {
1466
            if (STREQ(values[j], flags[i].value)) {
1467
                virQEMUCapsSet(qemuCaps, flags[i].flag);
1468 1469 1470 1471 1472 1473 1474 1475
                break;
            }
        }
    }
}


static void
1476 1477
virQEMUCapsFreeStringList(size_t len,
                          char **values)
1478 1479
{
    size_t i;
1480
    for (i = 0; i < len; i++)
1481 1482 1483 1484 1485 1486 1487 1488
        VIR_FREE(values[i]);
    VIR_FREE(values);
}


#define OBJECT_TYPE_PREFIX "name \""

static int
1489 1490
virQEMUCapsParseDeviceStrObjectTypes(const char *str,
                                     char ***types)
1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512
{
    const char *tmp = str;
    int ret = -1;
    size_t ntypelist = 0;
    char **typelist = NULL;

    *types = NULL;

    while ((tmp = strstr(tmp, OBJECT_TYPE_PREFIX))) {
        char *end;
        tmp += strlen(OBJECT_TYPE_PREFIX);
        end = strstr(tmp, "\"");
        if (!end) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("Malformed QEMU device list string, missing quote"));
            goto cleanup;
        }

        if (VIR_EXPAND_N(typelist, ntypelist, 1) < 0) {
            virReportOOMError();
            goto cleanup;
        }
1513
        if (VIR_STRNDUP(typelist[ntypelist - 1], tmp, end-tmp) < 0)
1514 1515 1516 1517 1518 1519 1520 1521
            goto cleanup;
    }

    *types = typelist;
    ret = ntypelist;

cleanup:
    if (ret < 0)
1522
        virQEMUCapsFreeStringList(ntypelist, typelist);
1523 1524 1525 1526 1527
    return ret;
}


static int
1528 1529 1530
virQEMUCapsParseDeviceStrObjectProps(const char *str,
                                     const char *type,
                                     char ***props)
1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
{
    const char *tmp = str;
    int ret = -1;
    size_t nproplist = 0;
    char **proplist = NULL;

    VIR_DEBUG("Extract type %s", type);
    *props = NULL;

    while ((tmp = strchr(tmp, '\n'))) {
        char *end;
        tmp += 1;

        if (*tmp == '\0')
            break;

        if (STRPREFIX(tmp, OBJECT_TYPE_PREFIX))
            continue;

        if (!STRPREFIX(tmp, type))
            continue;

        tmp += strlen(type);
        if (*tmp != '.')
            continue;
        tmp++;

        end = strstr(tmp, "=");
        if (!end) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("Malformed QEMU device list string, missing '='"));
            goto cleanup;
        }
        if (VIR_EXPAND_N(proplist, nproplist, 1) < 0) {
            virReportOOMError();
            goto cleanup;
        }
1568
        if (VIR_STRNDUP(proplist[nproplist - 1], tmp, end-tmp) < 0)
1569 1570 1571 1572 1573 1574 1575 1576
            goto cleanup;
    }

    *props = proplist;
    ret = nproplist;

cleanup:
    if (ret < 0)
1577
        virQEMUCapsFreeStringList(nproplist, proplist);
1578 1579 1580 1581 1582
    return ret;
}


int
1583
virQEMUCapsParseDeviceStr(virQEMUCapsPtr qemuCaps, const char *str)
1584 1585 1586 1587 1588
{
    int nvalues;
    char **values;
    size_t i;

1589
    if ((nvalues = virQEMUCapsParseDeviceStrObjectTypes(str, &values)) < 0)
1590
        return -1;
1591 1592 1593 1594 1595 1596
    virQEMUCapsProcessStringFlags(qemuCaps,
                                  ARRAY_CARDINALITY(virQEMUCapsObjectTypes),
                                  virQEMUCapsObjectTypes,
                                  nvalues, values);
    virQEMUCapsFreeStringList(nvalues, values);

1597
    for (i = 0; i < ARRAY_CARDINALITY(virQEMUCapsObjectProps); i++) {
1598 1599 1600 1601
        const char *type = virQEMUCapsObjectProps[i].type;
        if ((nvalues = virQEMUCapsParseDeviceStrObjectProps(str,
                                                            type,
                                                            &values)) < 0)
1602
            return -1;
1603 1604 1605 1606 1607
        virQEMUCapsProcessStringFlags(qemuCaps,
                                      virQEMUCapsObjectProps[i].nprops,
                                      virQEMUCapsObjectProps[i].props,
                                      nvalues, values);
        virQEMUCapsFreeStringList(nvalues, values);
1608 1609 1610
    }

    /* Prefer -chardev spicevmc (detected earlier) over -device spicevmc */
1611 1612
    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_SPICEVMC))
        virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_SPICEVMC);
1613 1614 1615 1616 1617

    return 0;
}


E
Eric Blake 已提交
1618
static int
1619 1620
virQEMUCapsExtractDeviceStr(const char *qemu,
                            virQEMUCapsPtr qemuCaps,
1621
                            uid_t runUid, gid_t runGid)
1622
{
E
Eric Blake 已提交
1623
    char *output = NULL;
1624
    virCommandPtr cmd;
E
Eric Blake 已提交
1625
    int ret = -1;
1626

E
Eric Blake 已提交
1627 1628
    /* Cram together all device-related queries into one invocation;
     * the output format makes it possible to distinguish what we
1629 1630
     * need.  With qemu 0.13.0 and later, unrecognized '-device
     * bogus,?' cause an error in isolation, but are silently ignored
1631
     * in combination with '-device ?'.  Upstream qemu 0.12.x doesn't
1632 1633
     * understand '-device name,?', and always exits with status 1 for
     * the simpler '-device ?', so this function is really only useful
1634
     * if -help includes "device driver,?".  */
1635
    cmd = virQEMUCapsProbeCommand(qemu, qemuCaps, runUid, runGid);
1636 1637 1638 1639 1640 1641
    virCommandAddArgList(cmd,
                         "-device", "?",
                         "-device", "pci-assign,?",
                         "-device", "virtio-blk-pci,?",
                         "-device", "virtio-net-pci,?",
                         "-device", "scsi-disk,?",
1642
                         "-device", "PIIX4_PM,?",
1643
                         "-device", "usb-redir,?",
1644
                         "-device", "ide-drive,?",
1645
                         "-device", "usb-host,?",
H
Han Cheng 已提交
1646
                         "-device", "scsi-generic,?",
1647
                         NULL);
1648
    /* qemu -help goes to stdout, but qemu -device ? goes to stderr.  */
E
Eric Blake 已提交
1649
    virCommandSetErrorBuffer(cmd, &output);
1650

1651
    if (virCommandRun(cmd, NULL) < 0)
1652 1653
        goto cleanup;

1654
    ret = virQEMUCapsParseDeviceStr(qemuCaps, output);
1655 1656

cleanup:
E
Eric Blake 已提交
1657
    VIR_FREE(output);
1658
    virCommandFree(cmd);
E
Eric Blake 已提交
1659 1660 1661
    return ret;
}

1662

1663 1664 1665
int virQEMUCapsGetDefaultVersion(virCapsPtr caps,
                                 virQEMUCapsCachePtr capsCache,
                                 unsigned int *version)
1666 1667
{
    const char *binary;
1668
    virQEMUCapsPtr qemucaps;
T
Tal Kain 已提交
1669
    virArch hostarch;
1670 1671 1672 1673

    if (*version > 0)
        return 0;

T
Tal Kain 已提交
1674
    hostarch = virArchFromHost();
1675 1676
    if ((binary = virCapabilitiesDefaultGuestEmulator(caps,
                                                      "hvm",
T
Tal Kain 已提交
1677
                                                      hostarch,
1678
                                                      "qemu")) == NULL) {
1679
        virReportError(VIR_ERR_INTERNAL_ERROR,
1680
                       _("Cannot find suitable emulator for %s"),
T
Tal Kain 已提交
1681
                       virArchToString(hostarch));
1682 1683 1684
        return -1;
    }

1685
    if (!(qemucaps = virQEMUCapsCacheLookup(capsCache, binary)))
1686 1687
        return -1;

1688
    *version = virQEMUCapsGetVersion(qemucaps);
1689
    virObjectUnref(qemucaps);
1690 1691
    return 0;
}
1692 1693


1694 1695


1696 1697
virQEMUCapsPtr
virQEMUCapsNew(void)
1698
{
1699
    virQEMUCapsPtr qemuCaps;
1700

1701
    if (virQEMUCapsInitialize() < 0)
1702 1703
        return NULL;

1704
    if (!(qemuCaps = virObjectNew(virQEMUCapsClass)))
1705 1706
        return NULL;

1707
    if (!(qemuCaps->flags = virBitmapNew(QEMU_CAPS_LAST)))
1708
        goto no_memory;
1709

1710
    return qemuCaps;
1711 1712 1713

no_memory:
    virReportOOMError();
1714
    virObjectUnref(qemuCaps);
1715
    return NULL;
1716 1717 1718
}


1719
virQEMUCapsPtr virQEMUCapsNewCopy(virQEMUCapsPtr qemuCaps)
1720
{
1721
    virQEMUCapsPtr ret = virQEMUCapsNew();
1722 1723 1724 1725 1726
    size_t i;

    if (!ret)
        return NULL;

1727
    virBitmapCopy(ret->flags, qemuCaps->flags);
1728

1729 1730 1731 1732
    ret->usedQMP = qemuCaps->usedQMP;
    ret->version = qemuCaps->version;
    ret->kvmVersion = qemuCaps->kvmVersion;
    ret->arch = qemuCaps->arch;
1733

1734
    if (VIR_ALLOC_N(ret->cpuDefinitions, qemuCaps->ncpuDefinitions) < 0)
1735
        goto no_memory;
1736
    ret->ncpuDefinitions = qemuCaps->ncpuDefinitions;
1737
    for (i = 0; i < qemuCaps->ncpuDefinitions; i++) {
1738 1739
        if (VIR_STRDUP(ret->cpuDefinitions[i], qemuCaps->cpuDefinitions[i]) < 0)
            goto error;
1740 1741
    }

1742
    if (VIR_ALLOC_N(ret->machineTypes, qemuCaps->nmachineTypes) < 0)
1743
        goto no_memory;
1744
    if (VIR_ALLOC_N(ret->machineAliases, qemuCaps->nmachineTypes) < 0)
1745
        goto no_memory;
1746
    ret->nmachineTypes = qemuCaps->nmachineTypes;
1747
    for (i = 0; i < qemuCaps->nmachineTypes; i++) {
1748 1749 1750
        if (VIR_STRDUP(ret->machineTypes[i], qemuCaps->machineTypes[i]) < 0 ||
            VIR_STRDUP(ret->machineAliases[i], qemuCaps->machineAliases[i]) < 0)
            goto error;
1751 1752 1753 1754 1755 1756
    }

    return ret;

no_memory:
    virReportOOMError();
1757
error:
1758 1759 1760 1761 1762
    virObjectUnref(ret);
    return NULL;
}


1763
void virQEMUCapsDispose(void *obj)
1764
{
1765
    virQEMUCapsPtr qemuCaps = obj;
1766 1767
    size_t i;

1768
    for (i = 0; i < qemuCaps->nmachineTypes; i++) {
1769 1770
        VIR_FREE(qemuCaps->machineTypes[i]);
        VIR_FREE(qemuCaps->machineAliases[i]);
1771
    }
1772 1773
    VIR_FREE(qemuCaps->machineTypes);
    VIR_FREE(qemuCaps->machineAliases);
1774

1775
    for (i = 0; i < qemuCaps->ncpuDefinitions; i++) {
1776
        VIR_FREE(qemuCaps->cpuDefinitions[i]);
1777
    }
1778
    VIR_FREE(qemuCaps->cpuDefinitions);
1779

1780
    virBitmapFree(qemuCaps->flags);
1781

1782
    VIR_FREE(qemuCaps->binary);
1783 1784
}

1785
void
1786 1787
virQEMUCapsSet(virQEMUCapsPtr qemuCaps,
               enum virQEMUCapsFlags flag)
1788
{
1789
    ignore_value(virBitmapSetBit(qemuCaps->flags, flag));
1790 1791 1792 1793
}


void
1794
virQEMUCapsSetList(virQEMUCapsPtr qemuCaps, ...)
1795 1796 1797 1798
{
    va_list list;
    int flag;

1799
    va_start(list, qemuCaps);
1800
    while ((flag = va_arg(list, int)) < QEMU_CAPS_LAST)
1801
        ignore_value(virBitmapSetBit(qemuCaps->flags, flag));
1802
    va_end(list);
1803 1804 1805 1806
}


void
1807 1808
virQEMUCapsClear(virQEMUCapsPtr qemuCaps,
                 enum virQEMUCapsFlags flag)
1809
{
1810
    ignore_value(virBitmapClearBit(qemuCaps->flags, flag));
1811 1812 1813
}


1814
char *virQEMUCapsFlagsString(virQEMUCapsPtr qemuCaps)
1815
{
1816
    return virBitmapString(qemuCaps->flags);
1817 1818 1819 1820
}


bool
1821 1822
virQEMUCapsGet(virQEMUCapsPtr qemuCaps,
               enum virQEMUCapsFlags flag)
1823
{
1824 1825
    bool b;

1826
    if (!qemuCaps || virBitmapGetBit(qemuCaps->flags, flag, &b) < 0)
1827 1828 1829
        return false;
    else
        return b;
1830
}
1831 1832


1833
const char *virQEMUCapsGetBinary(virQEMUCapsPtr qemuCaps)
1834
{
1835
    return qemuCaps->binary;
1836 1837
}

1838
virArch virQEMUCapsGetArch(virQEMUCapsPtr qemuCaps)
1839
{
1840
    return qemuCaps->arch;
1841 1842 1843
}


1844
unsigned int virQEMUCapsGetVersion(virQEMUCapsPtr qemuCaps)
1845
{
1846
    return qemuCaps->version;
1847 1848 1849
}


1850
unsigned int virQEMUCapsGetKVMVersion(virQEMUCapsPtr qemuCaps)
1851
{
1852
    return qemuCaps->kvmVersion;
1853 1854 1855
}


1856 1857
int virQEMUCapsAddCPUDefinition(virQEMUCapsPtr qemuCaps,
                                const char *name)
1858
{
1859 1860 1861
    char *tmp;

    if (VIR_STRDUP(tmp, name) < 0)
1862
        return -1;
1863
    if (VIR_EXPAND_N(qemuCaps->cpuDefinitions, qemuCaps->ncpuDefinitions, 1) < 0) {
1864 1865 1866 1867
        VIR_FREE(tmp);
        virReportOOMError();
        return -1;
    }
1868
    qemuCaps->cpuDefinitions[qemuCaps->ncpuDefinitions-1] = tmp;
1869 1870 1871 1872
    return 0;
}


1873 1874
size_t virQEMUCapsGetCPUDefinitions(virQEMUCapsPtr qemuCaps,
                                    char ***names)
1875
{
1876
    if (names)
1877 1878
        *names = qemuCaps->cpuDefinitions;
    return qemuCaps->ncpuDefinitions;
1879 1880 1881
}


1882 1883
size_t virQEMUCapsGetMachineTypes(virQEMUCapsPtr qemuCaps,
                                  char ***names)
1884
{
1885
    if (names)
1886 1887
        *names = qemuCaps->machineTypes;
    return qemuCaps->nmachineTypes;
1888 1889
}

1890 1891 1892
int virQEMUCapsGetMachineTypesCaps(virQEMUCapsPtr qemuCaps,
                                   size_t *nmachines,
                                   virCapsGuestMachinePtr **machines)
1893 1894 1895 1896 1897
{
    size_t i;

    *nmachines = 0;
    *machines = NULL;
1898
    if (VIR_ALLOC_N(*machines, qemuCaps->nmachineTypes) < 0)
1899
        goto error;
1900
    *nmachines = qemuCaps->nmachineTypes;
1901

1902
    for (i = 0; i < qemuCaps->nmachineTypes; i++) {
1903 1904
        virCapsGuestMachinePtr mach;
        if (VIR_ALLOC(mach) < 0)
1905
            goto error;
1906
        if (qemuCaps->machineAliases[i]) {
1907 1908 1909
            if (VIR_STRDUP(mach->name, qemuCaps->machineAliases[i]) < 0 ||
                VIR_STRDUP(mach->canonical, qemuCaps->machineTypes[i]) < 0)
                goto error;
1910
        } else {
1911 1912
            if (VIR_STRDUP(mach->name, qemuCaps->machineTypes[i]) < 0)
                goto error;
1913 1914 1915 1916 1917 1918
        }
        (*machines)[i] = mach;
    }

    return 0;

1919
error:
1920 1921 1922 1923 1924 1925 1926 1927
    virCapabilitiesFreeMachines(*machines, *nmachines);
    *nmachines = 0;
    *machines = NULL;
    return -1;
}



1928

1929 1930
const char *virQEMUCapsGetCanonicalMachine(virQEMUCapsPtr qemuCaps,
                                           const char *name)
1931 1932 1933
{
    size_t i;

1934 1935 1936
    if (!name)
        return NULL;

1937
    for (i = 0; i < qemuCaps->nmachineTypes; i++) {
1938
        if (!qemuCaps->machineAliases[i])
1939
            continue;
1940 1941
        if (STREQ(qemuCaps->machineAliases[i], name))
            return qemuCaps->machineTypes[i];
1942 1943 1944 1945
    }

    return name;
}
1946 1947


1948
static int
1949 1950
virQEMUCapsProbeQMPCommands(virQEMUCapsPtr qemuCaps,
                            qemuMonitorPtr mon)
1951 1952 1953 1954 1955 1956 1957 1958
{
    char **commands = NULL;
    int ncommands;
    size_t i;

    if ((ncommands = qemuMonitorGetCommands(mon, &commands)) < 0)
        return -1;

1959
    for (i = 0; i < ncommands; i++) {
1960 1961
        char *name = commands[i];
        if (STREQ(name, "system_wakeup"))
1962
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_WAKEUP);
1963
        else if (STREQ(name, "transaction"))
1964
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_TRANSACTION);
1965
        else if (STREQ(name, "block_job_cancel"))
1966
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_BLOCKJOB_SYNC);
1967
        else if (STREQ(name, "block-job-cancel"))
1968
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC);
1969
        else if (STREQ(name, "dump-guest-memory"))
1970
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DUMP_GUEST_MEMORY);
1971
        else if (STREQ(name, "query-spice"))
1972
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_SPICE);
1973
        else if (STREQ(name, "query-kvm"))
1974
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_KVM);
1975
        else if (STREQ(name, "block-commit"))
1976
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_BLOCK_COMMIT);
1977
        else if (STREQ(name, "query-vnc"))
1978
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC);
1979
        else if (STREQ(name, "drive-mirror"))
1980
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_MIRROR);
1981
        else if (STREQ(name, "blockdev-snapshot-sync"))
1982
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_DISK_SNAPSHOT);
1983
        else if (STREQ(name, "add-fd"))
1984
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_ADD_FD);
1985 1986
        else if (STREQ(name, "nbd-server-start"))
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_NBD_SERVER);
1987 1988 1989 1990
        VIR_FREE(name);
    }
    VIR_FREE(commands);

1991 1992 1993 1994
    /* QMP add-fd was introduced in 1.2, but did not support
     * management control of set numbering, and did not have a
     * counterpart -add-fd command line option.  We require the
     * add-fd features from 1.3 or later.  */
1995
    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_ADD_FD)) {
1996 1997 1998 1999 2000 2001 2002
        int fd = open("/dev/null", O_RDONLY);
        if (fd < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("unable to probe for add-fd"));
            return -1;
        }
        if (qemuMonitorAddFd(mon, 0, fd, "/dev/null") < 0)
2003
            virQEMUCapsClear(qemuCaps, QEMU_CAPS_ADD_FD);
2004 2005 2006
        VIR_FORCE_CLOSE(fd);
    }

2007 2008 2009 2010 2011
    return 0;
}


static int
2012 2013
virQEMUCapsProbeQMPEvents(virQEMUCapsPtr qemuCaps,
                          qemuMonitorPtr mon)
2014 2015 2016 2017 2018 2019 2020 2021
{
    char **events = NULL;
    int nevents;
    size_t i;

    if ((nevents = qemuMonitorGetEvents(mon, &events)) < 0)
        return -1;

2022
    for (i = 0; i < nevents; i++) {
2023 2024 2025
        char *name = events[i];

        if (STREQ(name, "BALLOON_CHANGE"))
2026
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_BALLOON_EVENT);
2027
        if (STREQ(name, "SPICE_MIGRATE_COMPLETED"))
2028
            virQEMUCapsSet(qemuCaps, QEMU_CAPS_SEAMLESS_MIGRATION);
2029 2030 2031 2032 2033 2034 2035 2036
        VIR_FREE(name);
    }
    VIR_FREE(events);

    return 0;
}


2037
static int
2038 2039
virQEMUCapsProbeQMPObjects(virQEMUCapsPtr qemuCaps,
                           qemuMonitorPtr mon)
2040 2041 2042 2043 2044 2045 2046
{
    int nvalues;
    char **values;
    size_t i;

    if ((nvalues = qemuMonitorGetObjectTypes(mon, &values)) < 0)
        return -1;
2047 2048 2049 2050 2051 2052
    virQEMUCapsProcessStringFlags(qemuCaps,
                                  ARRAY_CARDINALITY(virQEMUCapsObjectTypes),
                                  virQEMUCapsObjectTypes,
                                  nvalues, values);
    virQEMUCapsFreeStringList(nvalues, values);

2053
    for (i = 0; i < ARRAY_CARDINALITY(virQEMUCapsObjectProps); i++) {
2054
        const char *type = virQEMUCapsObjectProps[i].type;
2055 2056 2057 2058
        if ((nvalues = qemuMonitorGetObjectProps(mon,
                                                 type,
                                                 &values)) < 0)
            return -1;
2059 2060 2061 2062 2063
        virQEMUCapsProcessStringFlags(qemuCaps,
                                      virQEMUCapsObjectProps[i].nprops,
                                      virQEMUCapsObjectProps[i].props,
                                      nvalues, values);
        virQEMUCapsFreeStringList(nvalues, values);
2064 2065 2066
    }

    /* Prefer -chardev spicevmc (detected earlier) over -device spicevmc */
2067 2068
    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_SPICEVMC))
        virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_SPICEVMC);
2069
    /* If qemu supports newer -device qxl it supports -vga qxl as well */
2070 2071
    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_QXL))
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA_QXL);
2072 2073 2074 2075 2076 2077

    return 0;
}


static int
2078 2079
virQEMUCapsProbeQMPMachineTypes(virQEMUCapsPtr qemuCaps,
                                qemuMonitorPtr mon)
2080 2081 2082 2083 2084
{
    qemuMonitorMachineInfoPtr *machines = NULL;
    int nmachines = 0;
    int ret = -1;
    size_t i;
2085
    size_t defIdx = 0;
2086 2087 2088 2089

    if ((nmachines = qemuMonitorGetMachines(mon, &machines)) < 0)
        goto cleanup;

2090
    if (VIR_ALLOC_N(qemuCaps->machineTypes, nmachines) < 0) {
2091 2092 2093
        virReportOOMError();
        goto cleanup;
    }
2094
    if (VIR_ALLOC_N(qemuCaps->machineAliases, nmachines) < 0) {
2095 2096 2097 2098
        virReportOOMError();
        goto cleanup;
    }

2099
    for (i = 0; i < nmachines; i++) {
2100 2101
        if (VIR_STRDUP(qemuCaps->machineAliases[i], machines[i]->alias) < 0 ||
            VIR_STRDUP(qemuCaps->machineTypes[i], machines[i]->name) < 0)
2102
            goto cleanup;
2103 2104
        if (machines[i]->isDefault)
            defIdx = i;
2105
    }
2106
    qemuCaps->nmachineTypes = nmachines;
2107 2108

    if (defIdx)
2109
        virQEMUCapsSetDefaultMachine(qemuCaps, defIdx);
2110 2111 2112 2113

    ret = 0;

cleanup:
2114
    for (i = 0; i < nmachines; i++)
2115 2116 2117 2118 2119 2120 2121
        qemuMonitorMachineInfoFree(machines[i]);
    VIR_FREE(machines);
    return ret;
}


static int
2122 2123
virQEMUCapsProbeQMPCPUDefinitions(virQEMUCapsPtr qemuCaps,
                                  qemuMonitorPtr mon)
2124 2125 2126 2127 2128 2129 2130
{
    int ncpuDefinitions;
    char **cpuDefinitions;

    if ((ncpuDefinitions = qemuMonitorGetCPUDefinitions(mon, &cpuDefinitions)) < 0)
        return -1;

2131 2132
    qemuCaps->ncpuDefinitions = ncpuDefinitions;
    qemuCaps->cpuDefinitions = cpuDefinitions;
2133 2134 2135 2136

    return 0;
}

2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161
struct tpmTypeToCaps {
    int type;
    enum virQEMUCapsFlags caps;
};

static const struct tpmTypeToCaps virQEMUCapsTPMTypesToCaps[] = {
    {
        .type = VIR_DOMAIN_TPM_TYPE_PASSTHROUGH,
        .caps = QEMU_CAPS_DEVICE_TPM_PASSTHROUGH,
    },
};

const struct tpmTypeToCaps virQEMUCapsTPMModelsToCaps[] = {
    {
        .type = VIR_DOMAIN_TPM_MODEL_TIS,
        .caps = QEMU_CAPS_DEVICE_TPM_TIS,
    },
};

static int
virQEMUCapsProbeQMPTPM(virQEMUCapsPtr qemuCaps,
                       qemuMonitorPtr mon)
{
    int nentries, i;
    char **entries = NULL;
S
Stefan Berger 已提交
2162

2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
    if ((nentries = qemuMonitorGetTPMModels(mon, &entries)) < 0)
        return -1;

    if (nentries > 0) {
        for (i = 0; i < ARRAY_CARDINALITY(virQEMUCapsTPMModelsToCaps); i++) {
            const char *needle = virDomainTPMModelTypeToString(
                virQEMUCapsTPMModelsToCaps[i].type);
            if (virStringArrayHasString(entries, needle))
                virQEMUCapsSet(qemuCaps,
                               virQEMUCapsTPMModelsToCaps[i].caps);
        }
    }
    virStringFreeList(entries);

    if ((nentries = qemuMonitorGetTPMTypes(mon, &entries)) < 0)
        return -1;

    if (nentries > 0) {
        for (i = 0; i < ARRAY_CARDINALITY(virQEMUCapsTPMTypesToCaps); i++) {
            const char *needle = virDomainTPMBackendTypeToString(
                virQEMUCapsTPMTypesToCaps[i].type);
            if (virStringArrayHasString(entries, needle))
                virQEMUCapsSet(qemuCaps, virQEMUCapsTPMTypesToCaps[i].caps);
        }
    }
    virStringFreeList(entries);

    return 0;
}

2193

2194
static int
2195 2196
virQEMUCapsProbeQMPKVMState(virQEMUCapsPtr qemuCaps,
                            qemuMonitorPtr mon)
2197 2198 2199 2200
{
    bool enabled = false;
    bool present = false;

2201
    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
2202 2203 2204 2205 2206 2207
        return 0;

    if (qemuMonitorGetKVMState(mon, &enabled, &present) < 0)
        return -1;

    /* The QEMU_CAPS_KVM flag was initially set according to the QEMU
2208 2209 2210 2211 2212 2213 2214 2215
     * reporting the recognition of 'query-kvm' QMP command. That merely
     * indicates existance of the command though, not whether KVM support
     * is actually available, nor whether it is enabled by default.
     *
     * If it is not present we need to clear the flag, and if it is
     * not enabled by default we need to change the flag.
     */
    if (!present) {
2216
        virQEMUCapsClear(qemuCaps, QEMU_CAPS_KVM);
2217
    } else if (!enabled) {
2218 2219
        virQEMUCapsClear(qemuCaps, QEMU_CAPS_KVM);
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_ENABLE_KVM);
2220 2221 2222 2223 2224
    }

    return 0;
}

2225 2226 2227 2228 2229 2230 2231 2232
struct virQEMUCapsCommandLineProps {
    const char *option;
    const char *param;
    int flag;
};

static struct virQEMUCapsCommandLineProps virQEMUCapsCommandLine[] = {
    { "machine", "mem-merge", QEMU_CAPS_MEM_MERGE },
O
Osier Yang 已提交
2233
    { "drive", "discard", QEMU_CAPS_DRIVE_DISCARD },
2234
    { "realtime", "mlock", QEMU_CAPS_MLOCK },
2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260
};

static int
virQEMUCapsProbeQMPCommandLine(virQEMUCapsPtr qemuCaps,
                               qemuMonitorPtr mon)
{
    int nvalues;
    char **values;
    size_t i, j;

    for (i = 0; i < ARRAY_CARDINALITY(virQEMUCapsCommandLine); i++) {
        if ((nvalues = qemuMonitorGetCommandLineOptionParameters(mon,
                                                                 virQEMUCapsCommandLine[i].option,
                                                                 &values)) < 0)
            return -1;
        for (j = 0; j < nvalues; j++) {
            if (STREQ(virQEMUCapsCommandLine[i].param, values[j])) {
                virQEMUCapsSet(qemuCaps, virQEMUCapsCommandLine[i].flag);
                break;
            }
        }
        virStringFreeList(values);
    }

    return 0;
}
2261

2262 2263
int virQEMUCapsProbeQMP(virQEMUCapsPtr qemuCaps,
                        qemuMonitorPtr mon)
2264
{
2265
    VIR_DEBUG("qemuCaps=%p mon=%p", qemuCaps, mon);
2266

2267
    if (qemuCaps->usedQMP)
2268 2269
        return 0;

2270
    if (virQEMUCapsProbeQMPCommands(qemuCaps, mon) < 0)
2271 2272
        return -1;

2273
    if (virQEMUCapsProbeQMPEvents(qemuCaps, mon) < 0)
2274 2275 2276 2277 2278 2279
        return -1;

    return 0;
}


2280 2281
#define QEMU_SYSTEM_PREFIX "qemu-system-"

2282
static int
2283
virQEMUCapsInitHelp(virQEMUCapsPtr qemuCaps, uid_t runUid, gid_t runGid)
2284
{
2285
    virCommandPtr cmd = NULL;
2286
    bool is_kvm;
2287
    char *help = NULL;
2288 2289
    int ret = -1;
    const char *tmp;
2290

2291
    VIR_DEBUG("qemuCaps=%p", qemuCaps);
2292

2293
    tmp = strstr(qemuCaps->binary, QEMU_SYSTEM_PREFIX);
2294 2295
    if (tmp) {
        tmp += strlen(QEMU_SYSTEM_PREFIX);
2296

2297
        qemuCaps->arch = virQEMUCapsArchFromString(tmp);
2298
    } else {
2299
        qemuCaps->arch = virArchFromHost();
2300 2301
    }

2302
    cmd = virQEMUCapsProbeCommand(qemuCaps->binary, NULL, runUid, runGid);
2303 2304 2305 2306
    virCommandAddArgList(cmd, "-help", NULL);
    virCommandSetOutputBuffer(cmd, &help);

    if (virCommandRun(cmd, NULL) < 0)
2307
        goto cleanup;
2308

2309 2310 2311 2312 2313 2314
    if (virQEMUCapsParseHelpStr(qemuCaps->binary,
                                help, qemuCaps,
                                &qemuCaps->version,
                                &is_kvm,
                                &qemuCaps->kvmVersion,
                                false) < 0)
2315
        goto cleanup;
2316 2317

    /* Currently only x86_64 and i686 support PCI-multibus. */
2318 2319 2320
    if (qemuCaps->arch == VIR_ARCH_X86_64 ||
        qemuCaps->arch == VIR_ARCH_I686) {
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCI_MULTIBUS);
2321 2322 2323
    } else {
        /* -no-acpi is not supported on other archs
         * even if qemu reports it in -help */
2324
        virQEMUCapsClear(qemuCaps, QEMU_CAPS_NO_ACPI);
2325
    }
2326

2327
    /* virQEMUCapsExtractDeviceStr will only set additional caps if qemu
2328
     * understands the 0.13.0+ notion of "-device driver,".  */
2329
    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE) &&
2330
        strstr(help, "-device driver,?") &&
2331 2332
        virQEMUCapsExtractDeviceStr(qemuCaps->binary,
                                    qemuCaps, runUid, runGid) < 0) {
2333
        goto cleanup;
2334
    }
2335

2336
    if (virQEMUCapsProbeCPUModels(qemuCaps, runUid, runGid) < 0)
2337
        goto cleanup;
2338

2339
    if (virQEMUCapsProbeMachineTypes(qemuCaps, runUid, runGid) < 0)
2340
        goto cleanup;
2341

2342
    ret = 0;
2343
cleanup:
2344
    virCommandFree(cmd);
2345
    VIR_FREE(help);
2346 2347 2348 2349
    return ret;
}


2350 2351
static void virQEMUCapsMonitorNotify(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
                                     virDomainObjPtr vm ATTRIBUTE_UNUSED)
2352 2353 2354 2355
{
}

static qemuMonitorCallbacks callbacks = {
2356 2357
    .eofNotify = virQEMUCapsMonitorNotify,
    .errorNotify = virQEMUCapsMonitorNotify,
2358 2359 2360 2361 2362 2363 2364
};


/* Capabilities that we assume are always enabled
 * for QEMU >= 1.2.0
 */
static void
2365
virQEMUCapsInitQMPBasic(virQEMUCapsPtr qemuCaps)
2366
{
2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC_COLON);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_REBOOT);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NAME);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_UUID);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNET_HDR);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_TCP);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_V2);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_FORMAT);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_0_10);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MEM_PATH);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_SERIAL);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_CHARDEV);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MONITOR_JSON);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_BALLOON);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_SDL);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_SMP_TOPOLOGY);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_RTC);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VHOST_NET);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_HPET);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NODEFCONFIG);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_BOOT_MENU);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NAME_PROCESS);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_READONLY);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_SMBIOS_TYPE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VGA_NONE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_AIO);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_CHARDEV_SPICEVMC);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_QXL_VGA);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_DIRECTSYNC);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_SHUTDOWN);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_CACHE_UNSAFE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_READONLY);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VIRTIO_BLK_SG_IO);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_COPY_ON_READ);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_HOST);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_WRITEOUT);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_IOTUNE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_WAKEUP);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_USER_CONFIG);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_NETDEV_BRIDGE);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_SECCOMP_SANDBOX);
O
Olivia Yin 已提交
2416
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DTB);
J
Ján Tomko 已提交
2417
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_IPV6_MIGRATION);
2418 2419
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_OPT);
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE);
2420
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC_SHARE_POLICY);
2421
    virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_VIDEO_PRIMARY);
2422 2423
}

2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
/* Capabilities that are architecture depending
 * initialized for QEMU.
 */
static int
virQEMUCapsInitArchQMPBasic(virQEMUCapsPtr qemuCaps,
                            qemuMonitorPtr mon)
{
    char *archstr = NULL;
    int ret = -1;

    if (!(archstr = qemuMonitorGetTargetArch(mon)))
        return -1;

    if ((qemuCaps->arch = virQEMUCapsArchFromString(archstr)) == VIR_ARCH_NONE) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("Unknown QEMU arch %s"), archstr);
        goto cleanup;
    }

    /*
     * Currently only x86_64 and i686 support PCI-multibus,
     * -no-acpi and -no-kvm-pit-reinjection.
     */
    if (qemuCaps->arch == VIR_ARCH_X86_64 ||
        qemuCaps->arch == VIR_ARCH_I686) {
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCI_MULTIBUS);
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_ACPI);
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_NO_KVM_PIT);
    }

    ret = 0;

cleanup:
    VIR_FREE(archstr);
    return ret;
}
2460 2461

static int
2462 2463 2464 2465
virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps,
                   const char *libDir,
                   uid_t runUid,
                   gid_t runGid)
2466 2467 2468 2469 2470
{
    int ret = -1;
    virCommandPtr cmd = NULL;
    qemuMonitorPtr mon = NULL;
    int major, minor, micro;
2471
    char *package = NULL;
2472 2473 2474 2475
    int status = 0;
    virDomainChrSourceDef config;
    char *monarg = NULL;
    char *monpath = NULL;
2476
    char *pidfile = NULL;
2477 2478
    pid_t pid = 0;
    virDomainObj vm;
2479

2480 2481 2482
    /* the ".sock" sufix is important to avoid a possible clash with a qemu
     * domain called "capabilities"
     */
2483 2484 2485 2486 2487 2488 2489 2490 2491
    if (virAsprintf(&monpath, "%s/%s", libDir, "capabilities.monitor.sock") < 0) {
        virReportOOMError();
        goto cleanup;
    }
    if (virAsprintf(&monarg, "unix:%s,server,nowait", monpath) < 0) {
        virReportOOMError();
        goto cleanup;
    }

2492 2493
    /* ".pidfile" suffix is used rather than ".pid" to avoid a possible clash
     * with a qemu domain called "capabilities"
2494 2495 2496
     * Normally we'd use runDir for pid files, but because we're using
     * -daemonize we need QEMU to be allowed to create them, rather
     * than libvirtd. So we're using libDir which QEMU can write to
2497
     */
2498
    if (virAsprintf(&pidfile, "%s/%s", libDir, "capabilities.pidfile") < 0) {
2499 2500 2501 2502
        virReportOOMError();
        goto cleanup;
    }

2503 2504 2505 2506 2507
    memset(&config, 0, sizeof(config));
    config.type = VIR_DOMAIN_CHR_TYPE_UNIX;
    config.data.nix.path = monpath;
    config.data.nix.listen = false;

2508
    VIR_DEBUG("Try to get caps via QMP qemuCaps=%p", qemuCaps);
2509

2510 2511 2512 2513 2514 2515 2516
    /*
     * We explicitly need to use -daemonize here, rather than
     * virCommandDaemonize, because we need to synchronize
     * with QEMU creating its monitor socket API. Using
     * daemonize guarantees control won't return to libvirt
     * until the socket is present.
     */
2517
    cmd = virCommandNewArgList(qemuCaps->binary,
2518 2519 2520 2521 2522 2523
                               "-S",
                               "-no-user-config",
                               "-nodefaults",
                               "-nographic",
                               "-M", "none",
                               "-qmp", monarg,
2524 2525
                               "-pidfile", pidfile,
                               "-daemonize",
2526 2527 2528
                               NULL);
    virCommandAddEnvPassCommon(cmd);
    virCommandClearCaps(cmd);
2529 2530
    virCommandSetGID(cmd, runGid);
    virCommandSetUID(cmd, runUid);
2531 2532 2533 2534 2535 2536

    if (virCommandRun(cmd, &status) < 0)
        goto cleanup;

    if (status != 0) {
        ret = 0;
2537
        VIR_DEBUG("QEMU %s exited with status %d", qemuCaps->binary, status);
2538 2539 2540
        goto cleanup;
    }

2541 2542 2543 2544 2545 2546 2547 2548 2549 2550
    if (virPidFileReadPath(pidfile, &pid) < 0) {
        VIR_DEBUG("Failed to read pidfile %s", pidfile);
        ret = 0;
        goto cleanup;
    }

    memset(&vm, 0, sizeof(vm));
    vm.pid = pid;

    if (!(mon = qemuMonitorOpen(&vm, &config, true, &callbacks))) {
2551
        ret = 0;
2552
        goto cleanup;
2553
    }
2554

2555
    virObjectLock(mon);
2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577

    if (qemuMonitorSetCapabilities(mon) < 0) {
        virErrorPtr err = virGetLastError();
        VIR_DEBUG("Failed to set monitor capabilities %s",
                  err ? err->message : "<unknown problem>");
        ret = 0;
        goto cleanup;
    }

    if (qemuMonitorGetVersion(mon,
                              &major, &minor, &micro,
                              &package) < 0) {
        virErrorPtr err = virGetLastError();
        VIR_DEBUG("Failed to query monitor version %s",
                  err ? err->message : "<unknown problem>");
        ret = 0;
        goto cleanup;
    }

    VIR_DEBUG("Got version %d.%d.%d (%s)",
              major, minor, micro, NULLSTR(package));

2578
    if (major < 1 || (major == 1 && minor < 2)) {
2579 2580 2581 2582 2583
        VIR_DEBUG("Not new enough for QMP capabilities detection");
        ret = 0;
        goto cleanup;
    }

2584 2585
    qemuCaps->version = major * 1000000 + minor * 1000 + micro;
    qemuCaps->usedQMP = true;
2586

2587
    virQEMUCapsInitQMPBasic(qemuCaps);
2588

2589 2590 2591
    if (virQEMUCapsInitArchQMPBasic(qemuCaps, mon) < 0)
        goto cleanup;

L
Li Zhang 已提交
2592 2593 2594 2595
    /* USB option is supported v1.3.0 onwards */
    if (qemuCaps->version >= 1003000)
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_USB_OPT);

2596 2597 2598 2599
    /* WebSockets were introduced between 1.3.0 and 1.3.1 */
    if (qemuCaps->version >= 1003001)
        virQEMUCapsSet(qemuCaps, QEMU_CAPS_VNC_WEBSOCKET);

2600
    if (virQEMUCapsProbeQMPCommands(qemuCaps, mon) < 0)
2601
        goto cleanup;
2602
    if (virQEMUCapsProbeQMPEvents(qemuCaps, mon) < 0)
2603
        goto cleanup;
2604
    if (virQEMUCapsProbeQMPObjects(qemuCaps, mon) < 0)
2605
        goto cleanup;
2606
    if (virQEMUCapsProbeQMPMachineTypes(qemuCaps, mon) < 0)
2607
        goto cleanup;
2608
    if (virQEMUCapsProbeQMPCPUDefinitions(qemuCaps, mon) < 0)
2609
        goto cleanup;
2610
    if (virQEMUCapsProbeQMPKVMState(qemuCaps, mon) < 0)
2611
        goto cleanup;
2612 2613
    if (virQEMUCapsProbeQMPTPM(qemuCaps, mon) < 0)
        goto cleanup;
2614 2615
    if (virQEMUCapsProbeQMPCommandLine(qemuCaps, mon) < 0)
        goto cleanup;
2616 2617 2618 2619 2620

    ret = 0;

cleanup:
    if (mon)
2621
        virObjectUnlock(mon);
2622 2623
    qemuMonitorClose(mon);
    virCommandAbort(cmd);
2624
    virCommandFree(cmd);
2625 2626
    VIR_FREE(monarg);
    VIR_FREE(monpath);
2627
    VIR_FREE(package);
2628

2629
    if (pid != 0) {
2630 2631
        char ebuf[1024];

2632 2633 2634 2635 2636 2637 2638
        VIR_DEBUG("Killing QMP caps process %lld", (long long) pid);
        if (virProcessKill(pid, SIGKILL) < 0 && errno != ESRCH)
            VIR_ERROR(_("Failed to kill process %lld: %s"),
                      (long long) pid,
                      virStrerror(errno, ebuf, sizeof(ebuf)));
    }
    if (pidfile) {
2639 2640 2641
        unlink(pidfile);
        VIR_FREE(pidfile);
    }
2642 2643 2644 2645
    return ret;
}


2646 2647 2648 2649
virQEMUCapsPtr virQEMUCapsNewForBinary(const char *binary,
                                       const char *libDir,
                                       uid_t runUid,
                                       gid_t runGid)
2650
{
2651
    virQEMUCapsPtr qemuCaps = virQEMUCapsNew();
2652 2653 2654
    struct stat sb;
    int rv;

2655 2656
    if (VIR_STRDUP(qemuCaps->binary, binary) < 0)
        goto error;
2657 2658 2659 2660 2661 2662 2663 2664

    /* We would also want to check faccessat if we cared about ACLs,
     * but we don't.  */
    if (stat(binary, &sb) < 0) {
        virReportSystemError(errno, _("Cannot check QEMU binary %s"),
                             binary);
        goto error;
    }
2665
    qemuCaps->mtime = sb.st_mtime;
2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676

    /* Make sure the binary we are about to try exec'ing exists.
     * Technically we could catch the exec() failure, but that's
     * in a sub-process so it's hard to feed back a useful error.
     */
    if (!virFileIsExecutable(binary)) {
        virReportSystemError(errno, _("QEMU binary %s is not executable"),
                             binary);
        goto error;
    }

2677
    if ((rv = virQEMUCapsInitQMP(qemuCaps, libDir, runUid, runGid)) < 0)
2678 2679
        goto error;

2680 2681
    if (!qemuCaps->usedQMP &&
        virQEMUCapsInitHelp(qemuCaps, runUid, runGid) < 0)
2682 2683
        goto error;

2684
    return qemuCaps;
2685 2686

error:
2687 2688
    virObjectUnref(qemuCaps);
    qemuCaps = NULL;
2689
    return NULL;
2690 2691 2692
}


2693
bool virQEMUCapsIsValid(virQEMUCapsPtr qemuCaps)
2694 2695 2696
{
    struct stat sb;

2697
    if (!qemuCaps->binary)
2698 2699
        return true;

2700
    if (stat(qemuCaps->binary, &sb) < 0)
2701 2702
        return false;

2703
    return sb.st_mtime == qemuCaps->mtime;
2704
}
2705 2706 2707


static void
2708
virQEMUCapsHashDataFree(void *payload, const void *key ATTRIBUTE_UNUSED)
2709 2710 2711 2712 2713
{
    virObjectUnref(payload);
}


2714 2715 2716 2717
virQEMUCapsCachePtr
virQEMUCapsCacheNew(const char *libDir,
                    uid_t runUid,
                    gid_t runGid)
2718
{
2719
    virQEMUCapsCachePtr cache;
2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732

    if (VIR_ALLOC(cache) < 0) {
        virReportOOMError();
        return NULL;
    }

    if (virMutexInit(&cache->lock) < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       _("Unable to initialize mutex"));
        VIR_FREE(cache);
        return NULL;
    }

2733
    if (!(cache->binaries = virHashCreate(10, virQEMUCapsHashDataFree)))
2734
        goto error;
2735
    if (VIR_STRDUP(cache->libDir, libDir) < 0)
2736
        goto error;
2737

2738 2739 2740
    cache->runUid = runUid;
    cache->runGid = runGid;

2741 2742 2743
    return cache;

error:
2744
    virQEMUCapsCacheFree(cache);
2745 2746 2747 2748
    return NULL;
}


2749 2750
virQEMUCapsPtr
virQEMUCapsCacheLookup(virQEMUCapsCachePtr cache, const char *binary)
2751
{
2752
    virQEMUCapsPtr ret = NULL;
2753 2754 2755
    virMutexLock(&cache->lock);
    ret = virHashLookup(cache->binaries, binary);
    if (ret &&
2756
        !virQEMUCapsIsValid(ret)) {
2757 2758 2759 2760 2761 2762 2763 2764
        VIR_DEBUG("Cached capabilities %p no longer valid for %s",
                  ret, binary);
        virHashRemoveEntry(cache->binaries, binary);
        ret = NULL;
    }
    if (!ret) {
        VIR_DEBUG("Creating capabilities for %s",
                  binary);
2765 2766
        ret = virQEMUCapsNewForBinary(binary, cache->libDir,
                                      cache->runUid, cache->runGid);
2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782
        if (ret) {
            VIR_DEBUG("Caching capabilities %p for %s",
                      ret, binary);
            if (virHashAddEntry(cache->binaries, binary, ret) < 0) {
                virObjectUnref(ret);
                ret = NULL;
            }
        }
    }
    VIR_DEBUG("Returning caps %p for %s", ret, binary);
    virObjectRef(ret);
    virMutexUnlock(&cache->lock);
    return ret;
}


2783 2784
virQEMUCapsPtr
virQEMUCapsCacheLookupCopy(virQEMUCapsCachePtr cache, const char *binary)
2785
{
2786 2787
    virQEMUCapsPtr qemuCaps = virQEMUCapsCacheLookup(cache, binary);
    virQEMUCapsPtr ret;
2788

2789
    if (!qemuCaps)
2790 2791
        return NULL;

2792 2793
    ret = virQEMUCapsNewCopy(qemuCaps);
    virObjectUnref(qemuCaps);
2794 2795 2796 2797 2798
    return ret;
}


void
2799
virQEMUCapsCacheFree(virQEMUCapsCachePtr cache)
2800 2801 2802 2803
{
    if (!cache)
        return;

2804
    VIR_FREE(cache->libDir);
2805 2806 2807 2808
    virHashFree(cache->binaries);
    virMutexDestroy(&cache->lock);
    VIR_FREE(cache);
}
2809 2810

bool
2811
virQEMUCapsUsedQMP(virQEMUCapsPtr qemuCaps)
2812
{
2813
    return qemuCaps->usedQMP;
2814
}