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67a407e08b
libvirt/src/libxl/libxl_conf.c
Osier Yang 67a407e08b src/libxl: Remove the whitespace before ';'
2013-05-21 23:41:43 +08:00

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/*---------------------------------------------------------------------------*/
/* Copyright (C) 2012 Red Hat, Inc.
* Copyright (c) 2011 SUSE LINUX Products GmbH, Nuernberg, Germany.
* Copyright (C) 2011 Univention GmbH.
*
* 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, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Jim Fehlig <jfehlig@novell.com>
* Markus Groß <gross@univention.de>
*/
/*---------------------------------------------------------------------------*/
#include <config.h>
#include <regex.h>
#include <libxl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "internal.h"
#include "virlog.h"
#include "virerror.h"
#include "datatypes.h"
#include "virfile.h"
#include "virstring.h"
#include "viralloc.h"
#include "viruuid.h"
#include "capabilities.h"
#include "libxl_driver.h"
#include "libxl_conf.h"
#include "libxl_utils.h"
#include "virstoragefile.h"
#define VIR_FROM_THIS VIR_FROM_LIBXL
/* see xen-unstable.hg/xen/include/asm-x86/cpufeature.h */
#define LIBXL_X86_FEATURE_PAE_MASK 0x40
struct guest_arch {
virArch arch;
int bits;
int hvm;
int pae;
int nonpae;
int ia64_be;
};
static const char *xen_cap_re = "(xen|hvm)-[[:digit:]]+\\.[[:digit:]]+-(x86_32|x86_64|ia64|powerpc64)(p|be)?";
static regex_t xen_cap_rec;
static virCapsPtr
libxlBuildCapabilities(virArch hostarch,
int host_pae,
struct guest_arch *guest_archs,
int nr_guest_archs)
{
virCapsPtr caps;
int i;
if ((caps = virCapabilitiesNew(hostarch, 1, 1)) == NULL)
goto no_memory;
if (host_pae &&
virCapabilitiesAddHostFeature(caps, "pae") < 0)
goto no_memory;
for (i = 0; i < nr_guest_archs; ++i) {
virCapsGuestPtr guest;
char const *const xen_machines[] = {guest_archs[i].hvm ? "xenfv" : "xenpv"};
virCapsGuestMachinePtr *machines;
if ((machines = virCapabilitiesAllocMachines(xen_machines, 1)) == NULL)
goto no_memory;
if ((guest = virCapabilitiesAddGuest(caps,
guest_archs[i].hvm ? "hvm" : "xen",
guest_archs[i].arch,
((hostarch == VIR_ARCH_X86_64) ?
"/usr/lib64/xen/bin/qemu-dm" :
"/usr/lib/xen/bin/qemu-dm"),
(guest_archs[i].hvm ?
"/usr/lib/xen/boot/hvmloader" :
NULL),
1,
machines)) == NULL) {
virCapabilitiesFreeMachines(machines, 1);
goto no_memory;
}
machines = NULL;
if (virCapabilitiesAddGuestDomain(guest,
"xen",
NULL,
NULL,
0,
NULL) == NULL)
goto no_memory;
if (guest_archs[i].pae &&
virCapabilitiesAddGuestFeature(guest,
"pae",
1,
0) == NULL)
goto no_memory;
if (guest_archs[i].nonpae &&
virCapabilitiesAddGuestFeature(guest,
"nonpae",
1,
0) == NULL)
goto no_memory;
if (guest_archs[i].ia64_be &&
virCapabilitiesAddGuestFeature(guest,
"ia64_be",
1,
0) == NULL)
goto no_memory;
if (guest_archs[i].hvm) {
if (virCapabilitiesAddGuestFeature(guest,
"acpi",
1,
1) == NULL)
goto no_memory;
if (virCapabilitiesAddGuestFeature(guest, "apic",
1,
0) == NULL)
goto no_memory;
if (virCapabilitiesAddGuestFeature(guest,
"hap",
0,
1) == NULL)
goto no_memory;
}
}
return caps;
no_memory:
virObjectUnref(caps);
return NULL;
}
static virCapsPtr
libxlMakeCapabilitiesInternal(virArch hostarch,
libxl_physinfo *phy_info,
char *capabilities)
{
char *str, *token;
regmatch_t subs[4];
char *saveptr = NULL;
int i;
int host_pae = 0;
struct guest_arch guest_archs[32];
int nr_guest_archs = 0;
virCapsPtr caps = NULL;
memset(guest_archs, 0, sizeof(guest_archs));
/* hw_caps is an array of 32-bit words whose meaning is listed in
* xen-unstable.hg/xen/include/asm-x86/cpufeature.h. Each feature
* is defined in the form X*32+Y, corresponding to the Y'th bit in
* the X'th 32-bit word of hw_cap.
*/
host_pae = phy_info->hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
/* Format of capabilities string is documented in the code in
* xen-unstable.hg/xen/arch/.../setup.c.
*
* It is a space-separated list of supported guest architectures.
*
* For x86:
* TYP-VER-ARCH[p]
* ^ ^ ^ ^
* | | | +-- PAE supported
* | | +------- x86_32 or x86_64
* | +----------- the version of Xen, eg. "3.0"
* +--------------- "xen" or "hvm" for para or full virt respectively
*
* For IA64:
* TYP-VER-ARCH[be]
* ^ ^ ^ ^
* | | | +-- Big-endian supported
* | | +------- always "ia64"
* | +----------- the version of Xen, eg. "3.0"
* +--------------- "xen" or "hvm" for para or full virt respectively
*/
/* Split capabilities string into tokens. strtok_r is OK here because
* we "own" the buffer. Parse out the features from each token.
*/
for (str = capabilities, nr_guest_archs = 0;
nr_guest_archs < sizeof(guest_archs) / sizeof(guest_archs[0])
&& (token = strtok_r(str, " ", &saveptr)) != NULL;
str = NULL) {
if (regexec(&xen_cap_rec, token, sizeof(subs) / sizeof(subs[0]),
subs, 0) == 0) {
int hvm = STRPREFIX(&token[subs[1].rm_so], "hvm");
virArch arch;
int pae = 0, nonpae = 0, ia64_be = 0;
if (STRPREFIX(&token[subs[2].rm_so], "x86_32")) {
arch = VIR_ARCH_I686;
if (subs[3].rm_so != -1 &&
STRPREFIX(&token[subs[3].rm_so], "p"))
pae = 1;
else
nonpae = 1;
}
else if (STRPREFIX(&token[subs[2].rm_so], "x86_64")) {
arch = VIR_ARCH_X86_64;
}
else if (STRPREFIX(&token[subs[2].rm_so], "ia64")) {
arch = VIR_ARCH_ITANIUM;
if (subs[3].rm_so != -1 &&
STRPREFIX(&token[subs[3].rm_so], "be"))
ia64_be = 1;
}
else if (STRPREFIX(&token[subs[2].rm_so], "powerpc64")) {
arch = VIR_ARCH_PPC64;
} else {
/* XXX arm ? */
continue;
}
/* Search for existing matching (model,hvm) tuple */
for (i = 0; i < nr_guest_archs; i++) {
if ((guest_archs[i].arch == arch) &&
guest_archs[i].hvm == hvm) {
break;
}
}
/* Too many arch flavours - highly unlikely ! */
if (i >= ARRAY_CARDINALITY(guest_archs))
continue;
/* Didn't find a match, so create a new one */
if (i == nr_guest_archs)
nr_guest_archs++;
guest_archs[i].arch = arch;
guest_archs[i].hvm = hvm;
/* Careful not to overwrite a previous positive
setting with a negative one here - some archs
can do both pae & non-pae, but Xen reports
separately capabilities so we're merging archs */
if (pae)
guest_archs[i].pae = pae;
if (nonpae)
guest_archs[i].nonpae = nonpae;
if (ia64_be)
guest_archs[i].ia64_be = ia64_be;
}
}
if ((caps = libxlBuildCapabilities(hostarch,
host_pae,
guest_archs,
nr_guest_archs)) == NULL)
goto no_memory;
return caps;
no_memory:
virReportOOMError();
virObjectUnref(caps);
return NULL;
}
static int
libxlMakeDomCreateInfo(libxlDriverPrivatePtr driver,
virDomainDefPtr def,
libxl_domain_create_info *c_info)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
libxl_domain_create_info_init(c_info);
if (STREQ(def->os.type, "hvm"))
c_info->type = LIBXL_DOMAIN_TYPE_HVM;
else
c_info->type = LIBXL_DOMAIN_TYPE_PV;
if (VIR_STRDUP(c_info->name, def->name) < 0)
goto error;
if (def->nseclabels &&
def->seclabels[0]->type == VIR_DOMAIN_SECLABEL_STATIC) {
if (libxl_flask_context_to_sid(driver->ctx,
def->seclabels[0]->label,
strlen(def->seclabels[0]->label),
&c_info->ssidref)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight failed to resolve security label '%s'"),
def->seclabels[0]->label);
}
}
virUUIDFormat(def->uuid, uuidstr);
if (libxl_uuid_from_string(&c_info->uuid, uuidstr)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight failed to parse UUID '%s'"), uuidstr);
goto error;
}
return 0;
error:
libxl_domain_create_info_dispose(c_info);
return -1;
}
static int
libxlMakeDomBuildInfo(virDomainDefPtr def, libxl_domain_config *d_config)
{
libxl_domain_build_info *b_info = &d_config->b_info;
int hvm = STREQ(def->os.type, "hvm");
int i;
libxl_domain_build_info_init(b_info);
if (hvm)
libxl_domain_build_info_init_type(b_info, LIBXL_DOMAIN_TYPE_HVM);
else
libxl_domain_build_info_init_type(b_info, LIBXL_DOMAIN_TYPE_PV);
b_info->max_vcpus = def->maxvcpus;
libxl_bitmap_set((&b_info->avail_vcpus), def->vcpus);
if (def->clock.ntimers > 0 &&
def->clock.timers[0]->name == VIR_DOMAIN_TIMER_NAME_TSC) {
switch (def->clock.timers[0]->mode) {
case VIR_DOMAIN_TIMER_MODE_NATIVE:
b_info->tsc_mode = 2;
break;
case VIR_DOMAIN_TIMER_MODE_PARAVIRT:
b_info->tsc_mode = 3;
break;
default:
b_info->tsc_mode = 1;
}
}
b_info->sched_params.weight = 1000;
b_info->max_memkb = def->mem.max_balloon;
b_info->target_memkb = def->mem.cur_balloon;
if (hvm) {
char bootorder[VIR_DOMAIN_BOOT_LAST + 1];
libxl_defbool_set(&b_info->u.hvm.pae,
def->features & (1 << VIR_DOMAIN_FEATURE_PAE));
libxl_defbool_set(&b_info->u.hvm.apic,
def->features & (1 << VIR_DOMAIN_FEATURE_APIC));
libxl_defbool_set(&b_info->u.hvm.acpi,
def->features & (1 << VIR_DOMAIN_FEATURE_ACPI));
for (i = 0; i < def->clock.ntimers; i++) {
if (def->clock.timers[i]->name == VIR_DOMAIN_TIMER_NAME_HPET &&
def->clock.timers[i]->present == 1) {
libxl_defbool_set(&b_info->u.hvm.hpet, 1);
}
}
for (i = 0; i < def->os.nBootDevs; i++) {
switch (def->os.bootDevs[i]) {
case VIR_DOMAIN_BOOT_FLOPPY:
bootorder[i] = 'a';
break;
default:
case VIR_DOMAIN_BOOT_DISK:
bootorder[i] = 'c';
break;
case VIR_DOMAIN_BOOT_CDROM:
bootorder[i] = 'd';
break;
case VIR_DOMAIN_BOOT_NET:
bootorder[i] = 'n';
break;
}
}
if (def->os.nBootDevs == 0) {
bootorder[0] = 'c';
bootorder[1] = '\0';
}
else {
bootorder[def->os.nBootDevs] = '\0';
}
if (VIR_STRDUP(b_info->u.hvm.boot, bootorder) < 0)
goto error;
/*
* The following comment and calculation were taken directly from
* libxenlight's internal function libxl_get_required_shadow_memory():
*
* 256 pages (1MB) per vcpu, plus 1 page per MiB of RAM for the P2M map,
* plus 1 page per MiB of RAM to shadow the resident processes.
*/
b_info->shadow_memkb = 4 * (256 * libxl_bitmap_count_set(&b_info->avail_vcpus) +
2 * (b_info->max_memkb / 1024));
} else {
if (VIR_STRDUP(b_info->u.pv.bootloader, def->os.bootloader) < 0)
goto error;
if (def->os.bootloaderArgs) {
if (!(b_info->u.pv.bootloader_args =
virStringSplit(def->os.bootloaderArgs, " \t\n", 0)))
goto error;
}
if (VIR_STRDUP(b_info->u.pv.cmdline, def->os.cmdline) < 0)
goto error;
if (def->os.kernel) {
/* libxl_init_build_info() sets VIR_STRDUP(kernel.path, "hvmloader") */
VIR_FREE(b_info->u.pv.kernel);
if (VIR_STRDUP(b_info->u.pv.kernel, def->os.kernel) < 0)
goto error;
}
if (VIR_STRDUP(b_info->u.pv.ramdisk, def->os.initrd) < 0)
goto error;
}
return 0;
error:
libxl_domain_build_info_dispose(b_info);
return -1;
}
int
libxlMakeDisk(virDomainDiskDefPtr l_disk, libxl_device_disk *x_disk)
{
if (VIR_STRDUP(x_disk->pdev_path, l_disk->src) < 0)
return -1;
if (VIR_STRDUP(x_disk->vdev, l_disk->dst) < 0)
return -1;
if (l_disk->driverName) {
if (STREQ(l_disk->driverName, "tap") ||
STREQ(l_disk->driverName, "tap2")) {
switch (l_disk->format) {
case VIR_STORAGE_FILE_QCOW:
x_disk->format = LIBXL_DISK_FORMAT_QCOW;
x_disk->backend = LIBXL_DISK_BACKEND_QDISK;
break;
case VIR_STORAGE_FILE_QCOW2:
x_disk->format = LIBXL_DISK_FORMAT_QCOW2;
x_disk->backend = LIBXL_DISK_BACKEND_QDISK;
break;
case VIR_STORAGE_FILE_VHD:
x_disk->format = LIBXL_DISK_FORMAT_VHD;
x_disk->backend = LIBXL_DISK_BACKEND_TAP;
break;
case VIR_STORAGE_FILE_NONE:
/* No subtype specified, default to raw/tap */
case VIR_STORAGE_FILE_RAW:
x_disk->format = LIBXL_DISK_FORMAT_RAW;
x_disk->backend = LIBXL_DISK_BACKEND_TAP;
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight does not support disk driver %s"),
virStorageFileFormatTypeToString(l_disk->format));
return -1;
}
} else if (STREQ(l_disk->driverName, "file")) {
x_disk->format = LIBXL_DISK_FORMAT_RAW;
x_disk->backend = LIBXL_DISK_BACKEND_TAP;
} else if (STREQ(l_disk->driverName, "phy")) {
x_disk->format = LIBXL_DISK_FORMAT_RAW;
x_disk->backend = LIBXL_DISK_BACKEND_PHY;
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight does not support disk driver %s"),
l_disk->driverName);
return -1;
}
} else {
/*
* If driverName is not specified, default to raw as per
* xl-disk-configuration.txt in the xen documentation and let
* libxl pick a suitable backend.
*/
x_disk->format = LIBXL_DISK_FORMAT_RAW;
x_disk->backend = LIBXL_DISK_BACKEND_UNKNOWN;
}
/* XXX is this right? */
x_disk->removable = 1;
x_disk->readwrite = !l_disk->readonly;
x_disk->is_cdrom = l_disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ? 1 : 0;
if (l_disk->transient) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("libxenlight does not support transient disks"));
return -1;
}
return 0;
}
static int
libxlMakeDiskList(virDomainDefPtr def, libxl_domain_config *d_config)
{
virDomainDiskDefPtr *l_disks = def->disks;
int ndisks = def->ndisks;
libxl_device_disk *x_disks;
int i;
if (VIR_ALLOC_N(x_disks, ndisks) < 0) {
virReportOOMError();
return -1;
}
for (i = 0; i < ndisks; i++) {
if (libxlMakeDisk(l_disks[i], &x_disks[i]) < 0)
goto error;
}
d_config->disks = x_disks;
d_config->num_disks = ndisks;
return 0;
error:
for (i = 0; i < ndisks; i++)
libxl_device_disk_dispose(&x_disks[i]);
VIR_FREE(x_disks);
return -1;
}
int
libxlMakeNic(virDomainNetDefPtr l_nic, libxl_device_nic *x_nic)
{
/* TODO: Where is mtu stored?
*
* x_nics[i].mtu = 1492;
*/
virMacAddrGetRaw(&l_nic->mac, x_nic->mac);
if (l_nic->model && !STREQ(l_nic->model, "netfront")) {
if (VIR_STRDUP(x_nic->model, l_nic->model) < 0)
return -1;
x_nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
} else {
x_nic->nictype = LIBXL_NIC_TYPE_VIF;
}
if (VIR_STRDUP(x_nic->ifname, l_nic->ifname) < 0)
return -1;
if (l_nic->type == VIR_DOMAIN_NET_TYPE_BRIDGE) {
if (VIR_STRDUP(x_nic->bridge, l_nic->data.bridge.brname) < 0)
return -1;
if (VIR_STRDUP(x_nic->script, l_nic->script) < 0)
return -1;
} else {
if (l_nic->script) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("scripts are not supported on interfaces of type %s"),
virDomainNetTypeToString(l_nic->type));
return -1;
}
}
return 0;
}
static int
libxlMakeNicList(virDomainDefPtr def, libxl_domain_config *d_config)
{
virDomainNetDefPtr *l_nics = def->nets;
int nnics = def->nnets;
libxl_device_nic *x_nics;
int i;
if (VIR_ALLOC_N(x_nics, nnics) < 0) {
virReportOOMError();
return -1;
}
for (i = 0; i < nnics; i++) {
x_nics[i].devid = i;
if (libxlMakeNic(l_nics[i], &x_nics[i]))
goto error;
}
d_config->nics = x_nics;
d_config->num_nics = nnics;
return 0;
error:
for (i = 0; i < nnics; i++)
libxl_device_nic_dispose(&x_nics[i]);
VIR_FREE(x_nics);
return -1;
}
int
libxlMakeVfb(libxlDriverPrivatePtr driver,
virDomainGraphicsDefPtr l_vfb,
libxl_device_vfb *x_vfb)
{
unsigned short port;
const char *listenAddr;
switch (l_vfb->type) {
case VIR_DOMAIN_GRAPHICS_TYPE_SDL:
libxl_defbool_set(&x_vfb->sdl.enable, 1);
if (VIR_STRDUP(x_vfb->sdl.display, l_vfb->data.sdl.display) < 0)
return -1;
if (VIR_STRDUP(x_vfb->sdl.xauthority, l_vfb->data.sdl.xauth) < 0)
return -1;
break;
case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
libxl_defbool_set(&x_vfb->vnc.enable, 1);
/* driver handles selection of free port */
libxl_defbool_set(&x_vfb->vnc.findunused, 0);
if (l_vfb->data.vnc.autoport) {
if (virPortAllocatorAcquire(driver->reservedVNCPorts, &port) < 0)
return -1;
if (port == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Unable to find an unused VNC port"));
return -1;
}
l_vfb->data.vnc.port = port;
}
x_vfb->vnc.display = l_vfb->data.vnc.port - LIBXL_VNC_PORT_MIN;
listenAddr = virDomainGraphicsListenGetAddress(l_vfb, 0);
if (listenAddr) {
/* libxl_device_vfb_init() does VIR_STRDUP("127.0.0.1") */
VIR_FREE(x_vfb->vnc.listen);
if (VIR_STRDUP(x_vfb->vnc.listen, listenAddr) < 0)
return -1;
}
if (VIR_STRDUP(x_vfb->keymap, l_vfb->data.vnc.keymap) < 0)
return -1;
break;
}
return 0;
}
static int
libxlMakeVfbList(libxlDriverPrivatePtr driver,
virDomainDefPtr def,
libxl_domain_config *d_config)
{
virDomainGraphicsDefPtr *l_vfbs = def->graphics;
int nvfbs = def->ngraphics;
libxl_device_vfb *x_vfbs;
libxl_device_vkb *x_vkbs;
int i;
if (nvfbs == 0)
return 0;
if (VIR_ALLOC_N(x_vfbs, nvfbs) < 0) {
virReportOOMError();
return -1;
}
if (VIR_ALLOC_N(x_vkbs, nvfbs) < 0) {
virReportOOMError();
VIR_FREE(x_vfbs);
return -1;
}
for (i = 0; i < nvfbs; i++) {
libxl_device_vfb_init(&x_vfbs[i]);
libxl_device_vkb_init(&x_vkbs[i]);
if (libxlMakeVfb(driver, l_vfbs[i], &x_vfbs[i]) < 0)
goto error;
}
d_config->vfbs = x_vfbs;
d_config->vkbs = x_vkbs;
d_config->num_vfbs = d_config->num_vkbs = nvfbs;
return 0;
error:
for (i = 0; i < nvfbs; i++) {
libxl_device_vfb_dispose(&x_vfbs[i]);
libxl_device_vkb_dispose(&x_vkbs[i]);
}
VIR_FREE(x_vfbs);
VIR_FREE(x_vkbs);
return -1;
}
virCapsPtr
libxlMakeCapabilities(libxl_ctx *ctx)
{
int err;
libxl_physinfo phy_info;
const libxl_version_info *ver_info;
err = regcomp(&xen_cap_rec, xen_cap_re, REG_EXTENDED);
if (err != 0) {
char error[100];
regerror(err, &xen_cap_rec, error, sizeof(error));
regfree(&xen_cap_rec);
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to compile regex %s"), error);
return NULL;
}
if (libxl_get_physinfo(ctx, &phy_info) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get node physical info from libxenlight"));
return NULL;
}
if ((ver_info = libxl_get_version_info(ctx)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get version info from libxenlight"));
return NULL;
}
return libxlMakeCapabilitiesInternal(virArchFromHost(),
&phy_info,
ver_info->capabilities);
}
int
libxlBuildDomainConfig(libxlDriverPrivatePtr driver,
virDomainDefPtr def, libxl_domain_config *d_config)
{
if (libxlMakeDomCreateInfo(driver, def, &d_config->c_info) < 0)
return -1;
if (libxlMakeDomBuildInfo(def, d_config) < 0) {
return -1;
}
if (libxlMakeDiskList(def, d_config) < 0) {
return -1;
}
if (libxlMakeNicList(def, d_config) < 0) {
return -1;
}
if (libxlMakeVfbList(driver, def, d_config) < 0) {
return -1;
}
d_config->on_reboot = def->onReboot;
d_config->on_poweroff = def->onPoweroff;
d_config->on_crash = def->onCrash;
return 0;
}
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