qemu_conf.h

/*
 * qemu_conf.h: QEMU configuration management
 *
 * Copyright (C) 2006, 2007, 2009 Red Hat, Inc.
 * 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
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 * Author: Daniel P. Berrange <berrange@redhat.com>
 */

#ifndef __QEMUD_CONF_H
#define __QEMUD_CONF_H

#include <config.h>

#include "ebtables.h"
#include "internal.h"
#include "bridge.h"
#include "capabilities.h"
#include "network_conf.h"
#include "domain_conf.h"
#include "domain_event.h"
#include "threads.h"
#include "security/security_driver.h"
#include "cgroup.h"
#include "pci.h"
#include "cpu_conf.h"
#include "driver.h"

#define qemudDebug(fmt, ...) do {} while(0)

#define QEMUD_CPUMASK_LEN CPU_SETSIZE

/* Internal flags to keep track of qemu command line capabilities */
enum qemud_cmd_flags {
    QEMUD_CMD_FLAG_KQEMU          = (1 << 0), /* Whether KQEMU is compiled in */
    QEMUD_CMD_FLAG_VNC_COLON      = (1 << 1), /* Does the VNC take just port, or address + display */
    QEMUD_CMD_FLAG_NO_REBOOT      = (1 << 2), /* Is the -no-reboot flag available */
    QEMUD_CMD_FLAG_DRIVE          = (1 << 3), /* Is the new -drive arg available */
    QEMUD_CMD_FLAG_DRIVE_BOOT     = (1 << 4), /* Does -drive support boot=on */
    QEMUD_CMD_FLAG_NAME           = (1 << 5), /* Is the -name flag available */
    QEMUD_CMD_FLAG_UUID           = (1 << 6), /* Is the -uuid flag available */
    QEMUD_CMD_FLAG_DOMID          = (1 << 7), /* Xenner only, special -domid flag available */
    QEMUD_CMD_FLAG_VNET_HDR        = (1 << 8),
    QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO = (1 << 9),  /* Original migration code from KVM. Also had tcp, but we can't use that
                                                   * since it had a design bug blocking the entire monitor console */
    QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP  = (1 << 10), /* New migration syntax after merge to QEMU with TCP transport */
    QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC = (1 << 11), /* New migration syntax after merge to QEMU with EXEC transport */
    QEMUD_CMD_FLAG_DRIVE_CACHE_V2    = (1 << 12), /* Is the cache= flag wanting new v2 values */
    QEMUD_CMD_FLAG_KVM               = (1 << 13), /* Whether KVM is compiled in */
    QEMUD_CMD_FLAG_DRIVE_FORMAT      = (1 << 14), /* Is -drive format= avail */
    QEMUD_CMD_FLAG_VGA               = (1 << 15), /* Is -vga avail */

    /* features added in qemu-0.10.0 */
    QEMUD_CMD_FLAG_0_10         = (1 << 16),
    QEMUD_CMD_FLAG_NET_NAME     = QEMUD_CMD_FLAG_0_10, /* -net ...,name=str */
    QEMUD_CMD_FLAG_HOST_NET_ADD = QEMUD_CMD_FLAG_0_10, /* host_net_add monitor command */

    QEMUD_CMD_FLAG_PCIDEVICE     = (1 << 17), /* PCI device assignment only supported by qemu-kvm */
    QEMUD_CMD_FLAG_MEM_PATH      = (1 << 18), /* mmap'ped guest backing supported */
    QEMUD_CMD_FLAG_DRIVE_SERIAL  = (1 << 19), /* -driver serial=  available */
    QEMUD_CMD_FLAG_XEN_DOMID     = (1 << 20), /* -xen-domid (new style xen integration) */
    QEMUD_CMD_FLAG_MIGRATE_QEMU_UNIX = (1 << 21), /* Does qemu support unix domain sockets for migration? */
    QEMUD_CMD_FLAG_CHARDEV       = (1 << 22), /* Is the new -chardev arg available */
    QEMUD_CMD_FLAG_ENABLE_KVM    = (1 << 23), /* Is the -enable-kvm flag available to "enable KVM full virtualization support" */
    QEMUD_CMD_FLAG_MONITOR_JSON  = (1 << 24), /* JSON mode for monitor */
    QEMUD_CMD_FLAG_BALLOON       = (1 << 25), /* -balloon available */
};

/* Main driver state */
struct qemud_driver {
    virMutex lock;

    int privileged;

    uid_t user;
    gid_t group;

    unsigned int qemuVersion;
    int nextvmid;

    virCgroupPtr cgroup;
    int cgroupControllers;
    char **cgroupDeviceACL;

    virDomainObjList domains;

    brControl *brctl;
    /* These four directories are ones libvirtd uses (so must be root:root
     * to avoid security risk from QEMU processes */
    char *configDir;
    char *autostartDir;
    char *logDir;
    char *stateDir;
    /* These two directories are ones QEMU processes use (so must match
     * the QEMU user/group */
    char *libDir;
    char *cacheDir;
    unsigned int vncTLS : 1;
    unsigned int vncTLSx509verify : 1;
    unsigned int vncSASL : 1;
    char *vncTLSx509certdir;
    char *vncListen;
    char *vncPassword;
    char *vncSASLdir;
    char *hugetlbfs_mount;
    char *hugepage_path;

    unsigned int macFilter : 1;
    ebtablesContext *ebtables;

    virCapsPtr caps;

    /* An array of callbacks */
    virDomainEventCallbackListPtr domainEventCallbacks;
    virDomainEventQueuePtr domainEventQueue;
    int domainEventTimer;
    int domainEventDispatching;

    char *securityDriverName;
    virSecurityDriverPtr securityDriver;

    char *saveImageFormat;

    pciDeviceList *activePciHostdevs;
};


/* Port numbers used for KVM migration. */
#define QEMUD_MIGRATION_FIRST_PORT 49152
#define QEMUD_MIGRATION_NUM_PORTS 64

/* Config type for XML import/export conversions */
#define QEMU_CONFIG_FORMAT_ARGV "qemu-argv"

#define qemudReportError(conn, dom, net, code, fmt...)                       \
        virReportErrorHelper(conn, VIR_FROM_QEMU, code, __FILE__,          \
                               __FUNCTION__, __LINE__, fmt)


int qemudLoadDriverConfig(struct qemud_driver *driver,
                          const char *filename);

virCapsPtr  qemudCapsInit               (virCapsPtr old_caps);

int         qemudExtractVersion         (virConnectPtr conn,
                                         struct qemud_driver *driver);
int         qemudExtractVersionInfo     (const char *qemu,
                                         unsigned int *version,
                                         unsigned int *flags);

int         qemudParseHelpStr           (const char *str,
                                         unsigned int *flags,
                                         unsigned int *version,
                                         unsigned int *is_kvm,
                                         unsigned int *kvm_version);

int         qemudBuildCommandLine       (virConnectPtr conn,
                                         struct qemud_driver *driver,
                                         virDomainDefPtr def,
                                         virDomainChrDefPtr monitor_chr,
                                         int monitor_json,
                                         unsigned int qemuCmdFlags,
                                         const char ***retargv,
                                         const char ***retenv,
                                         int **tapfds,
                                         int *ntapfds,
                                         const char *migrateFrom);

int         qemuBuildHostNetStr         (virConnectPtr conn,
                                         virDomainNetDefPtr net,
                                         char type_sep,
                                         int vlan,
                                         const char *tapfd,
                                         char **str);

int         qemuBuildNicStr             (virConnectPtr conn,
                                         virDomainNetDefPtr net,
                                         const char *prefix,
                                         int vlan,
                                         char **str);


char *      qemuBuildDriveStr           (virDomainDiskDefPtr disk,
                                         int bootable,
                                         int qemuCmdFlags);

int         qemudNetworkIfaceConnect    (virConnectPtr conn,
                                         struct qemud_driver *driver,
                                         virDomainNetDefPtr net,
                                         int qemuCmdFlags);

int         qemuAssignNetNames          (virDomainDefPtr def,
                                         virDomainNetDefPtr net);

int         qemudProbeMachineTypes      (const char *binary,
                                         virCapsGuestMachinePtr **machines,
                                         int *nmachines);

int         qemudProbeCPUModels         (const char *qemu,
                                         const char *arch,
                                         unsigned int *count,
                                         const char ***cpus);

int         qemudCanonicalizeMachine    (struct qemud_driver *driver,
                                         virDomainDefPtr def);

virDomainDefPtr qemuParseCommandLine(virConnectPtr conn,
                                     virCapsPtr caps,
                                     const char **progenv,
                                     const char **progargv);
virDomainDefPtr qemuParseCommandLineString(virConnectPtr conn,
                                           virCapsPtr caps,
                                           const char *args);

#endif /* __QEMUD_CONF_H */