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xen/tools/libs/light/libxl_create.c
T
Carlo Nonato 748bd725fb tools: add support for cache coloring configuration 
Add a new "llc_colors" parameter that defines the LLC color assignment for
a domain. The user can specify one or more color ranges using the same
syntax used everywhere else for color config described in the
documentation.
The parameter is defined as a list of strings that represent the color
ranges.

Documentation is also added.
Golang bindings are regenerated.

Based on original work from: Luca Miccio <lucmiccio@gmail.com>

Signed-off-by: Carlo Nonato <carlo.nonato@minervasys.tech>
Signed-off-by: Marco Solieri <marco.solieri@minervasys.tech>
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
2024-12-19 19:24:31 +01:00

2452 lines
86 KiB
C
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/*
* Copyright (C) 2010 Citrix Ltd.
* Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
* Author Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* Author Gianni Tedesco <gianni.tedesco@citrix.com>
*
* This program 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; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program 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.
*/
#include "libxl_osdeps.h" /* must come before any other headers */
#include "libxl_internal.h"
#include "libxl_arch.h"
#include <xenguest.h>
#include <xen/hvm/hvm_info_table.h>
#include <xen/hvm/e820.h>
#include <xen-xsm/flask/flask.h>
int libxl__domain_create_info_setdefault(libxl__gc *gc,
libxl_domain_create_info *c_info,
const libxl_physinfo *info)
{
if (!c_info->type) {
LOG(ERROR, "domain type unspecified");
return ERROR_INVAL;
}
libxl__arch_domain_create_info_setdefault(gc, c_info);
if (c_info->type != LIBXL_DOMAIN_TYPE_PV) {
if (info->cap_hap) {
libxl_defbool_setdefault(&c_info->hap, true);
} else if (info->cap_shadow) {
libxl_defbool_setdefault(&c_info->hap, false);
} else {
LOG(ERROR, "neither hap nor shadow paging available");
return ERROR_INVAL;
}
libxl_defbool_setdefault(&c_info->oos, true);
}
libxl_defbool_setdefault(&c_info->run_hotplug_scripts, true);
libxl_defbool_setdefault(&c_info->driver_domain, false);
if (!c_info->ssidref)
c_info->ssidref = SECINITSID_DOMU;
libxl_defbool_setdefault(&c_info->xend_suspend_evtchn_compat, false);
return 0;
}
void libxl__rdm_setdefault(libxl__gc *gc, libxl_domain_build_info *b_info)
{
if (b_info->u.hvm.rdm.policy == LIBXL_RDM_RESERVE_POLICY_INVALID)
b_info->u.hvm.rdm.policy = LIBXL_RDM_RESERVE_POLICY_RELAXED;
if (b_info->u.hvm.rdm_mem_boundary_memkb == LIBXL_MEMKB_DEFAULT)
b_info->u.hvm.rdm_mem_boundary_memkb =
LIBXL_RDM_MEM_BOUNDARY_MEMKB_DEFAULT;
}
int libxl__domain_build_info_setdefault(libxl__gc *gc,
libxl_domain_build_info *b_info)
{
int i, rc;
libxl_physinfo info;
if (b_info->type != LIBXL_DOMAIN_TYPE_HVM &&
b_info->type != LIBXL_DOMAIN_TYPE_PV &&
b_info->type != LIBXL_DOMAIN_TYPE_PVH) {
LOG(ERROR, "invalid domain type");
return ERROR_INVAL;
}
/* Copy deprecated options to it's new position. */
rc = libxl__domain_build_info_copy_deprecated(CTX, b_info);
if (rc) {
LOG(ERROR, "Unable to copy deprecated fields");
return rc;
}
libxl_defbool_setdefault(&b_info->device_model_stubdomain, false);
libxl_defbool_setdefault(&b_info->vpmu, false);
if (libxl_defbool_val(b_info->device_model_stubdomain) &&
!b_info->device_model_ssidref)
b_info->device_model_ssidref = SECINITSID_DOMDM;
if (!b_info->device_model_version) {
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
if (libxl_defbool_val(b_info->device_model_stubdomain)) {
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
} else {
b_info->device_model_version = LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN;
}
} else {
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN;
}
if (b_info->device_model_version
== LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN) {
const char *dm;
dm = libxl__domain_device_model(gc, b_info);
rc = access(dm, X_OK);
if (rc < 0) {
/* qemu-xen unavailable, use qemu-xen-traditional */
if (errno == ENOENT) {
LOGE(INFO, "qemu-xen is unavailable"
", using qemu-xen-traditional instead");
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
} else {
LOGE(ERROR, "qemu-xen access error");
return ERROR_FAIL;
}
}
}
}
if (b_info->blkdev_start == NULL)
b_info->blkdev_start = libxl__strdup(NOGC, "xvda");
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
if (!b_info->u.hvm.bios)
switch (b_info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
b_info->u.hvm.bios = LIBXL_BIOS_TYPE_ROMBIOS; break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
b_info->u.hvm.bios = LIBXL_BIOS_TYPE_SEABIOS; break;
default:
LOG(ERROR, "unknown device model version");
return ERROR_INVAL;
}
/* Enforce BIOS<->Device Model version relationship */
switch (b_info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
if (b_info->u.hvm.bios != LIBXL_BIOS_TYPE_ROMBIOS) {
LOG(ERROR, "qemu-xen-traditional requires bios=rombios.");
return ERROR_INVAL;
}
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
if (b_info->u.hvm.bios == LIBXL_BIOS_TYPE_ROMBIOS) {
LOG(ERROR, "qemu-xen does not support bios=rombios.");
return ERROR_INVAL;
}
break;
default:abort();
}
/* Check HVM direct boot parameters, we should honour ->ramdisk and
* ->cmdline iff ->kernel is set.
*/
if (!b_info->kernel && (b_info->ramdisk || b_info->cmdline)) {
LOG(ERROR, "direct boot parameters specified but kernel missing");
return ERROR_INVAL;
}
}
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM &&
libxl_defbool_val(b_info->device_model_stubdomain)) {
if (!b_info->stubdomain_kernel) {
switch (b_info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
b_info->stubdomain_kernel =
libxl__abs_path(NOGC, "ioemu-stubdom.gz", libxl__xenfirmwaredir_path());
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
b_info->stubdomain_kernel =
libxl__abs_path(NOGC,
"qemu-stubdom-linux-kernel",
libxl__xenfirmwaredir_path());
break;
default:
abort();
}
}
if (!b_info->stubdomain_ramdisk) {
switch (b_info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
b_info->stubdomain_ramdisk =
libxl__abs_path(NOGC,
"qemu-stubdom-linux-rootfs",
libxl__xenfirmwaredir_path());
break;
default:
abort();
}
}
}
if (!b_info->max_vcpus)
b_info->max_vcpus = 1;
if (!b_info->avail_vcpus.size) {
if (libxl_cpu_bitmap_alloc(CTX, &b_info->avail_vcpus, 1)) {
LOG(ERROR, "unable to allocate avail_vcpus bitmap");
return ERROR_FAIL;
}
libxl_bitmap_set(&b_info->avail_vcpus, 0);
} else if (b_info->avail_vcpus.size > HVM_MAX_VCPUS) {
LOG(ERROR, "avail_vcpus bitmap contains too many VCPUS");
return ERROR_FAIL;
}
/* In libxl internals, we want to deal with vcpu_hard_affinity only! */
if (b_info->cpumap.size && !b_info->num_vcpu_hard_affinity) {
b_info->vcpu_hard_affinity = libxl__calloc(gc, b_info->max_vcpus,
sizeof(libxl_bitmap));
for (i = 0; i < b_info->max_vcpus; i++) {
if (libxl_cpu_bitmap_alloc(CTX, &b_info->vcpu_hard_affinity[i], 0)) {
LOG(ERROR, "failed to allocate vcpu hard affinity bitmap");
return ERROR_FAIL;
}
libxl_bitmap_copy(CTX, &b_info->vcpu_hard_affinity[i],
&b_info->cpumap);
}
b_info->num_vcpu_hard_affinity = b_info->max_vcpus;
}
libxl_defbool_setdefault(&b_info->numa_placement, true);
if (b_info->max_memkb == LIBXL_MEMKB_DEFAULT)
b_info->max_memkb = 32 * 1024;
if (b_info->target_memkb == LIBXL_MEMKB_DEFAULT)
b_info->target_memkb = b_info->max_memkb;
if (b_info->stubdomain_memkb == LIBXL_MEMKB_DEFAULT) {
if (libxl_defbool_val(b_info->device_model_stubdomain)) {
if (libxl__stubdomain_is_linux(b_info))
b_info->stubdomain_memkb = LIBXL_LINUX_STUBDOM_MEM * 1024;
else
b_info->stubdomain_memkb = 28 * 1024; // MiniOS
} else {
b_info->stubdomain_memkb = 0; // no stubdomain
}
}
libxl_defbool_setdefault(&b_info->claim_mode, false);
libxl_defbool_setdefault(&b_info->localtime, false);
libxl_defbool_setdefault(&b_info->disable_migrate, false);
for (i = 0 ; i < b_info->num_iomem; i++)
if (b_info->iomem[i].gfn == LIBXL_INVALID_GFN)
b_info->iomem[i].gfn = b_info->iomem[i].start;
if (!b_info->event_channels)
b_info->event_channels = 1023;
rc = libxl_get_physinfo(CTX, &info);
if (rc) {
LOG(ERROR, "failed to get hypervisor info");
return rc;
}
rc = libxl__arch_domain_build_info_setdefault(gc, b_info, &info);
if (rc) {
LOG(ERROR, "unable to set domain arch build info defaults");
return rc;
}
libxl_defbool_setdefault(&b_info->dm_restrict, false);
if (b_info->iommu_memkb == LIBXL_MEMKB_DEFAULT)
/* Normally defaulted in libxl__domain_create_info_setdefault */
b_info->iommu_memkb = 0;
switch (b_info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
/* Normally defaulted in libxl__domain_create_info_setdefault */
b_info->shadow_memkb = 0;
if (b_info->u.hvm.mmio_hole_memkb == LIBXL_MEMKB_DEFAULT)
b_info->u.hvm.mmio_hole_memkb = 0;
if (b_info->u.hvm.vga.kind == LIBXL_VGA_INTERFACE_TYPE_UNKNOWN) {
b_info->u.hvm.vga.kind = LIBXL_VGA_INTERFACE_TYPE_CIRRUS;
}
if (!b_info->u.hvm.hdtype)
b_info->u.hvm.hdtype = LIBXL_HDTYPE_IDE;
switch (b_info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
switch (b_info->u.hvm.vga.kind) {
case LIBXL_VGA_INTERFACE_TYPE_NONE:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 0;
break;
case LIBXL_VGA_INTERFACE_TYPE_QXL:
LOG(ERROR,"qemu upstream required for qxl vga");
return ERROR_INVAL;
break;
case LIBXL_VGA_INTERFACE_TYPE_STD:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 8 * 1024;
if (b_info->video_memkb < 8 * 1024) {
LOG(ERROR, "videoram must be at least 8 MB for STDVGA on QEMU_XEN_TRADITIONAL");
return ERROR_INVAL;
}
break;
case LIBXL_VGA_INTERFACE_TYPE_CIRRUS:
default:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 4 * 1024;
if (b_info->video_memkb != 4 * 1024)
LOG(WARN, "ignoring videoram other than 4 MB for CIRRUS on QEMU_XEN_TRADITIONAL");
break;
}
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
default:
switch (b_info->u.hvm.vga.kind) {
case LIBXL_VGA_INTERFACE_TYPE_NONE:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 0;
break;
case LIBXL_VGA_INTERFACE_TYPE_QXL:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT) {
b_info->video_memkb = (128 * 1024);
} else if (b_info->video_memkb < (128 * 1024)) {
LOG(ERROR,
"128 Mib videoram is the minimum for qxl default");
return ERROR_INVAL;
}
break;
case LIBXL_VGA_INTERFACE_TYPE_STD:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 16 * 1024;
if (b_info->video_memkb < 16 * 1024) {
LOG(ERROR, "videoram must be at least 16 MB for STDVGA on QEMU_XEN");
return ERROR_INVAL;
}
break;
case LIBXL_VGA_INTERFACE_TYPE_CIRRUS:
default:
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 8 * 1024;
if (b_info->video_memkb < 8 * 1024) {
LOG(ERROR, "videoram must be at least 8 MB for CIRRUS on QEMU_XEN");
return ERROR_INVAL;
}
break;
}
break;
}
libxl_defbool_setdefault(&b_info->u.hvm.pae, true);
libxl_defbool_setdefault(&b_info->u.hvm.acpi, true);
libxl_defbool_setdefault(&b_info->u.hvm.acpi_s3, true);
libxl_defbool_setdefault(&b_info->u.hvm.acpi_s4, true);
libxl_defbool_setdefault(&b_info->u.hvm.acpi_laptop_slate, false);
libxl_defbool_setdefault(&b_info->u.hvm.nx, true);
libxl_defbool_setdefault(&b_info->u.hvm.viridian, false);
libxl_defbool_setdefault(&b_info->u.hvm.hpet, true);
libxl_defbool_setdefault(&b_info->u.hvm.vpt_align, true);
libxl_defbool_setdefault(&b_info->u.hvm.usb, false);
libxl_defbool_setdefault(&b_info->u.hvm.vkb_device, true);
libxl_defbool_setdefault(&b_info->u.hvm.xen_platform_pci, true);
libxl_defbool_setdefault(&b_info->u.hvm.pirq, false);
libxl_defbool_setdefault(&b_info->u.hvm.spice.enable, false);
if (!libxl_defbool_val(b_info->u.hvm.spice.enable) &&
(b_info->u.hvm.spice.usbredirection > 0) ){
b_info->u.hvm.spice.usbredirection = 0;
LOG(WARN, "spice disabled, disabling usbredirection");
}
if (!b_info->u.hvm.usbversion &&
(b_info->u.hvm.spice.usbredirection > 0) )
b_info->u.hvm.usbversion = 2;
if ((b_info->u.hvm.usbversion || b_info->u.hvm.spice.usbredirection) &&
( libxl_defbool_val(b_info->u.hvm.usb)
|| b_info->u.hvm.usbdevice_list
|| b_info->u.hvm.usbdevice) ){
LOG(ERROR,"usbversion and/or usbredirection cannot be "
"enabled with usb and/or usbdevice parameters.");
return ERROR_INVAL;
}
if (!b_info->u.hvm.boot)
b_info->u.hvm.boot = libxl__strdup(NOGC, "cda");
libxl_defbool_setdefault(&b_info->u.hvm.vnc.enable, true);
if (libxl_defbool_val(b_info->u.hvm.vnc.enable)) {
libxl_defbool_setdefault(&b_info->u.hvm.vnc.findunused, true);
if (!b_info->u.hvm.vnc.listen)
b_info->u.hvm.vnc.listen = libxl__strdup(NOGC, "127.0.0.1");
}
libxl_defbool_setdefault(&b_info->u.hvm.sdl.enable, false);
if (libxl_defbool_val(b_info->u.hvm.sdl.enable)) {
libxl_defbool_setdefault(&b_info->u.hvm.sdl.opengl, false);
}
if (libxl_defbool_val(b_info->u.hvm.spice.enable)) {
libxl_defbool_setdefault(&b_info->u.hvm.spice.disable_ticketing,
false);
libxl_defbool_setdefault(&b_info->u.hvm.spice.agent_mouse, true);
libxl_defbool_setdefault(&b_info->u.hvm.spice.vdagent, false);
libxl_defbool_setdefault(&b_info->u.hvm.spice.clipboard_sharing,
false);
}
libxl_defbool_setdefault(&b_info->u.hvm.nographic, false);
libxl_defbool_setdefault(&b_info->u.hvm.gfx_passthru, false);
libxl__rdm_setdefault(gc, b_info);
break;
case LIBXL_DOMAIN_TYPE_PV:
libxl_defbool_setdefault(&b_info->u.pv.e820_host, false);
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 0;
if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
/* Normally defaulted in libxl__domain_create_info_setdefault */
b_info->shadow_memkb = 0;
if (b_info->u.pv.slack_memkb == LIBXL_MEMKB_DEFAULT)
b_info->u.pv.slack_memkb = 0;
break;
case LIBXL_DOMAIN_TYPE_PVH:
libxl_defbool_setdefault(&b_info->u.pvh.pvshim, false);
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 0;
if (libxl_defbool_val(b_info->u.pvh.pvshim)) {
if (!b_info->u.pvh.pvshim_path)
b_info->u.pvh.pvshim_path =
libxl__sprintf(NOGC, "%s/%s",
libxl__xenfirmwaredir_path(),
PVSHIM_BASENAME);
if (!b_info->u.pvh.pvshim_cmdline)
b_info->u.pvh.pvshim_cmdline =
libxl__strdup(NOGC, PVSHIM_CMDLINE);
}
break;
default:
LOG(ERROR, "invalid domain type %s in create info",
libxl_domain_type_to_string(b_info->type));
return ERROR_INVAL;
}
/* Configuration fields shared between PVH and HVM. */
if (b_info->type != LIBXL_DOMAIN_TYPE_PV) {
if (libxl__timer_mode_is_default(&b_info->timer_mode))
b_info->timer_mode = LIBXL_TIMER_MODE_NO_DELAY_FOR_MISSED_TICKS;
libxl_defbool_setdefault(&b_info->apic, true);
libxl_defbool_setdefault(&b_info->nested_hvm, false);
}
if (b_info->max_grant_version == LIBXL_MAX_GRANT_DEFAULT) {
if (info.cap_gnttab_v2)
b_info->max_grant_version = 2;
else if (info.cap_gnttab_v1)
b_info->max_grant_version = 1;
else
/* No grant table support reported */
b_info->max_grant_version = 0;
} else if (b_info->max_grant_version & ~XEN_DOMCTL_GRANT_version_mask) {
LOG(ERROR, "max grant version %d out of range",
b_info->max_grant_version);
return -ERROR_INVAL;
}
/* Assume that providing a bootloader user implies enabling restrict. */
libxl_defbool_setdefault(&b_info->bootloader_restrict,
!!b_info->bootloader_user);
/* ENV takes precedence over provided domain_build_info. */
if (getenv("LIBXL_BOOTLOADER_RESTRICT") ||
getenv("LIBXL_BOOTLOADER_USER"))
libxl_defbool_set(&b_info->bootloader_restrict, true);
if(getenv("LIBXL_BOOTLOADER_USER"))
b_info->bootloader_user =
libxl__strdup(gc, getenv("LIBXL_BOOTLOADER_USER"));
return 0;
}
static void init_console_info(libxl__gc *gc,
libxl__device_console *console,
int dev_num)
{
libxl__device_console_init(console);
console->devid = dev_num;
console->consback = LIBXL__CONSOLE_BACKEND_XENCONSOLED;
console->output = libxl__strdup(NOGC, "pty");
/* console->{name,connection,path} are NULL on normal consoles.
Only 'channels' when mapped to consoles have a string name. */
}
int libxl__domain_build(libxl__gc *gc,
libxl_domain_config *d_config,
uint32_t domid,
libxl__domain_build_state *state)
{
libxl_domain_build_info *const info = &d_config->b_info;
char **vments = NULL, **localents = NULL;
struct timeval start_time;
int i, ret;
ret = libxl__build_pre(gc, domid, d_config, state);
if (ret)
goto out;
gettimeofday(&start_time, NULL);
switch (info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
ret = libxl__build_hvm(gc, domid, d_config, state);
if (ret)
goto out;
vments = libxl__calloc(gc, 7, sizeof(char *));
vments[0] = "rtc/timeoffset";
vments[1] = (info->u.hvm.timeoffset) ? info->u.hvm.timeoffset : "";
vments[2] = "image/ostype";
vments[3] = "hvm";
vments[4] = "start_time";
vments[5] = GCSPRINTF("%jd.%02d", (intmax_t)start_time.tv_sec,(int)start_time.tv_usec/10000);
localents = libxl__calloc(gc, 13, sizeof(char *));
i = 0;
localents[i++] = "platform/acpi";
localents[i++] = libxl__acpi_defbool_val(info) ? "1" : "0";
localents[i++] = "platform/acpi_s3";
localents[i++] = libxl_defbool_val(info->u.hvm.acpi_s3) ? "1" : "0";
localents[i++] = "platform/acpi_s4";
localents[i++] = libxl_defbool_val(info->u.hvm.acpi_s4) ? "1" : "0";
localents[i++] = "platform/acpi_laptop_slate";
localents[i++] = libxl_defbool_val(info->u.hvm.acpi_laptop_slate) ? "1" : "0";
if (info->u.hvm.mmio_hole_memkb) {
uint64_t max_ram_below_4g =
(1ULL << 32) - (info->u.hvm.mmio_hole_memkb << 10);
if (max_ram_below_4g <= HVM_BELOW_4G_MMIO_START) {
localents[i++] = "platform/mmio_hole_size";
localents[i++] =
GCSPRINTF("%"PRIu64,
info->u.hvm.mmio_hole_memkb << 10);
}
}
localents[i++] = "platform/device-model";
localents[i++] = (char *)libxl_device_model_version_to_string(info->device_model_version);
break;
case LIBXL_DOMAIN_TYPE_PV:
ret = libxl__build_pv(gc, domid, d_config, state);
if (ret)
goto out;
vments = libxl__calloc(gc, 11, sizeof(char *));
i = 0;
vments[i++] = "image/ostype";
vments[i++] = "linux";
vments[i++] = "image/kernel";
vments[i++] = (char *) state->pv_kernel.path;
vments[i++] = "start_time";
vments[i++] = GCSPRINTF("%jd.%02d", (intmax_t)start_time.tv_sec,(int)start_time.tv_usec/10000);
if (state->pv_ramdisk.path) {
vments[i++] = "image/ramdisk";
vments[i++] = (char *) state->pv_ramdisk.path;
}
if (state->pv_cmdline) {
vments[i++] = "image/cmdline";
vments[i++] = (char *) state->pv_cmdline;
}
break;
case LIBXL_DOMAIN_TYPE_PVH:
state->shim_path = info->u.pvh.pvshim_path;
state->shim_cmdline = GCSPRINTF("%s%s%s",
info->u.pvh.pvshim_cmdline,
info->u.pvh.pvshim_extra ? " " : "",
info->u.pvh.pvshim_extra ? info->u.pvh.pvshim_extra : "");
ret = libxl__build_hvm(gc, domid, d_config, state);
if (ret)
goto out;
vments = libxl__calloc(gc, 3, sizeof(char *));
vments[0] = "start_time";
vments[1] = GCSPRINTF("%"PRIu64".%02ld",
(uint64_t)start_time.tv_sec,
(long)start_time.tv_usec/10000);
break;
default:
ret = ERROR_INVAL;
goto out;
}
ret = libxl__build_post(gc, domid, info, state, vments, localents);
out:
return ret;
}
int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
libxl__domain_build_state *state,
uint32_t *domid, bool soft_reset)
{
libxl_ctx *ctx = libxl__gc_owner(gc);
int ret, rc;
const char *dom_type;
char *uuid_string;
char *dom_path, *vm_path, *libxl_path;
struct xs_permissions roperm[2];
struct xs_permissions rwperm[1];
struct xs_permissions noperm[1];
xs_transaction_t t = 0;
/* convenience aliases */
libxl_domain_create_info *info = &d_config->c_info;
libxl_domain_build_info *b_info = &d_config->b_info;
assert(soft_reset || *domid == INVALID_DOMID);
uuid_string = libxl__uuid2string(gc, info->uuid);
if (!uuid_string) {
rc = ERROR_NOMEM;
goto out;
}
if (!soft_reset) {
struct xen_domctl_createdomain create = {
.ssidref = info->ssidref,
.max_vcpus = b_info->max_vcpus,
.max_evtchn_port = b_info->event_channels,
.max_grant_frames = b_info->max_grant_frames,
.max_maptrack_frames = b_info->max_maptrack_frames,
.grant_opts = XEN_DOMCTL_GRANT_version(b_info->max_grant_version),
.vmtrace_size = ROUNDUP(b_info->vmtrace_buf_kb << 10, XC_PAGE_SHIFT),
.cpupool_id = info->poolid,
};
if (info->type != LIBXL_DOMAIN_TYPE_PV) {
create.flags |= XEN_DOMCTL_CDF_hvm;
if ( libxl_defbool_val(info->hap) )
create.flags |= XEN_DOMCTL_CDF_hap;
if ( !libxl_defbool_val(info->oos) )
create.flags |= XEN_DOMCTL_CDF_oos_off;
if ( libxl_defbool_val(b_info->nested_hvm) )
create.flags |= XEN_DOMCTL_CDF_nested_virt;
}
if (libxl_defbool_val(b_info->vpmu))
create.flags |= XEN_DOMCTL_CDF_vpmu;
assert(info->passthrough != LIBXL_PASSTHROUGH_DEFAULT);
LOG(DETAIL, "passthrough: %s",
libxl_passthrough_to_string(info->passthrough));
if (info->passthrough != LIBXL_PASSTHROUGH_DISABLED)
create.flags |= XEN_DOMCTL_CDF_iommu;
if (info->passthrough == LIBXL_PASSTHROUGH_SYNC_PT)
create.iommu_opts |= XEN_DOMCTL_IOMMU_no_sharept;
LOG(DETAIL, "altp2m: %s", libxl_altp2m_mode_to_string(b_info->altp2m));
switch(b_info->altp2m) {
case LIBXL_ALTP2M_MODE_MIXED:
create.altp2m_opts |=
XEN_DOMCTL_ALTP2M_mode(XEN_DOMCTL_ALTP2M_mixed);
break;
case LIBXL_ALTP2M_MODE_EXTERNAL:
create.altp2m_opts |=
XEN_DOMCTL_ALTP2M_mode(XEN_DOMCTL_ALTP2M_external);
break;
case LIBXL_ALTP2M_MODE_LIMITED:
create.altp2m_opts |=
XEN_DOMCTL_ALTP2M_mode(XEN_DOMCTL_ALTP2M_limited);
break;
case LIBXL_ALTP2M_MODE_DISABLED:
/* Nothing to do - altp2m disabled is signaled as mode == 0. */
break;
}
/* Ultimately, handle is an array of 16 uint8_t, same as uuid */
libxl_uuid_copy(ctx, (libxl_uuid *)&create.handle, &info->uuid);
ret = libxl__arch_domain_prepare_config(gc, d_config, &create);
if (ret < 0) {
LOGED(ERROR, *domid, "fail to get domain config");
rc = ERROR_FAIL;
goto out;
}
for (;;) {
uint32_t local_domid;
bool recent;
if (info->domid == RANDOM_DOMID) {
uint16_t v;
ret = libxl__random_bytes(gc, (void *)&v, sizeof(v));
if (ret < 0)
break;
v &= DOMID_MASK;
if (!libxl_domid_valid_guest(v))
continue;
local_domid = v;
} else {
local_domid = info->domid; /* May not be valid */
}
ret = xc_domain_create(ctx->xch, &local_domid, &create);
if (ret < 0) {
/*
* If we generated a random domid and creation failed
* because that domid already exists then simply try
* again.
*/
if (errno == EEXIST && info->domid == RANDOM_DOMID)
continue;
LOGED(ERROR, local_domid, "domain creation fail");
rc = ERROR_FAIL;
goto out;
}
/* A new domain now exists */
*domid = local_domid;
ret = xc_domain_set_llc_colors(ctx->xch, local_domid,
b_info->llc_colors,
b_info->num_llc_colors);
if (ret < 0) {
if (errno == EOPNOTSUPP) {
if (b_info->num_llc_colors > 0) {
LOGED(ERROR, local_domid,
"LLC coloring not enabled in the hypervisor");
rc = ERROR_FAIL;
goto out;
}
} else {
LOGED(ERROR, local_domid, "LLC colors allocation failed");
rc = ERROR_FAIL;
goto out;
}
}
rc = libxl__is_domid_recent(gc, local_domid, &recent);
if (rc)
goto out;
/* The domid is not recent, so we're done */
if (!recent)
break;
/*
* If the domid was specified then there's no point in
* trying again.
*/
if (libxl_domid_valid_guest(info->domid)) {
LOGED(ERROR, local_domid, "domain id recently used");
rc = ERROR_FAIL;
goto out;
}
/*
* The domain is recent and so cannot be used. Clear domid
* here since, if xc_domain_destroy() fails below there is
* little point calling it again in the error path.
*/
*domid = INVALID_DOMID;
ret = xc_domain_destroy(ctx->xch, local_domid);
if (ret < 0) {
LOGED(ERROR, local_domid, "domain destroy fail");
rc = ERROR_FAIL;
goto out;
}
/* The domain was successfully destroyed, so we can try again */
}
rc = libxl__arch_domain_save_config(gc, d_config, state, &create);
if (rc < 0)
goto out;
}
/*
* If soft_reset is set the the domid will have been valid on entry.
* If it was not set then xc_domain_create() should have assigned a
* valid value. Either way, if we reach this point, domid should be
* valid.
*/
assert(libxl_domid_valid_guest(*domid));
dom_path = libxl__xs_get_dompath(gc, *domid);
if (!dom_path) {
rc = ERROR_FAIL;
goto out;
}
vm_path = GCSPRINTF("/vm/%s", uuid_string);
if (!vm_path) {
LOGD(ERROR, *domid, "cannot allocate create paths");
rc = ERROR_FAIL;
goto out;
}
libxl_path = libxl__xs_libxl_path(gc, *domid);
if (!libxl_path) {
rc = ERROR_FAIL;
goto out;
}
noperm[0].id = 0;
noperm[0].perms = XS_PERM_NONE;
roperm[0].id = 0;
roperm[0].perms = XS_PERM_NONE;
roperm[1].id = *domid;
roperm[1].perms = XS_PERM_READ;
rwperm[0].id = *domid;
rwperm[0].perms = XS_PERM_NONE;
retry_transaction:
t = xs_transaction_start(ctx->xsh);
xs_rm(ctx->xsh, t, dom_path);
libxl__xs_mknod(gc, t, dom_path, roperm, ARRAY_SIZE(roperm));
xs_rm(ctx->xsh, t, vm_path);
libxl__xs_mknod(gc, t, vm_path, roperm, ARRAY_SIZE(roperm));
xs_rm(ctx->xsh, t, libxl_path);
libxl__xs_mknod(gc, t, libxl_path, noperm, ARRAY_SIZE(noperm));
libxl__xs_mknod(gc, t, GCSPRINTF("%s/device", libxl_path),
noperm, ARRAY_SIZE(noperm));
xs_write(ctx->xsh, t, GCSPRINTF("%s/vm", dom_path), vm_path, strlen(vm_path));
rc = libxl__domain_rename(gc, *domid, 0, info->name, t);
if (rc)
goto out;
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/cpu", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/memory", dom_path),
roperm, ARRAY_SIZE(roperm));
if (!libxl_defbool_val(info->xend_suspend_evtchn_compat)) {
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/device", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/device/suspend/event-channel",
dom_path),
rwperm, ARRAY_SIZE(rwperm));
} else {
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/device", dom_path),
rwperm, ARRAY_SIZE(rwperm));
}
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control", dom_path),
roperm, ARRAY_SIZE(roperm));
if (info->type == LIBXL_DOMAIN_TYPE_HVM)
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/hvmloader", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/shutdown", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/feature-poweroff", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/feature-reboot", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/feature-suspend", dom_path),
rwperm, ARRAY_SIZE(rwperm));
if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/feature-s3", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/feature-s4", dom_path),
rwperm, ARRAY_SIZE(rwperm));
}
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/control/sysrq", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/data", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/drivers", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/feature", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/attr", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mknod(gc, t,
GCSPRINTF("%s/error", dom_path),
rwperm, ARRAY_SIZE(rwperm));
if (libxl_defbool_val(info->driver_domain)) {
/*
* Create a local "libxl" directory for each guest, since we might want
* to use libxl from inside the guest
*/
libxl__xs_mknod(gc, t, GCSPRINTF("%s/libxl", dom_path), rwperm,
ARRAY_SIZE(rwperm));
/*
* Create a local "device-model" directory for each guest, since we
* might want to use Qemu from inside the guest
*/
libxl__xs_mknod(gc, t, GCSPRINTF("%s/device-model", dom_path), rwperm,
ARRAY_SIZE(rwperm));
}
xs_write(ctx->xsh, t, GCSPRINTF("%s/uuid", vm_path), uuid_string, strlen(uuid_string));
xs_write(ctx->xsh, t, GCSPRINTF("%s/name", vm_path), info->name, strlen(info->name));
libxl__xs_writev(gc, t, dom_path, info->xsdata);
libxl__xs_writev(gc, t, GCSPRINTF("%s/platform", dom_path), info->platformdata);
xs_write(ctx->xsh, t, GCSPRINTF("%s/control/platform-feature-multiprocessor-suspend", dom_path), "1", 1);
xs_write(ctx->xsh, t, GCSPRINTF("%s/control/platform-feature-xs_reset_watches", dom_path), "1", 1);
dom_type = libxl_domain_type_to_string(info->type);
xs_write(ctx->xsh, t, GCSPRINTF("%s/type", libxl_path), dom_type,
strlen(dom_type));
if (!xs_transaction_end(ctx->xsh, t, 0)) {
if (errno == EAGAIN)
goto retry_transaction;
LOGED(ERROR, *domid, "domain creation ""xenstore transaction commit failed");
rc = ERROR_FAIL;
goto out;
}
t = 0;
rc = 0;
out:
if (t) xs_transaction_end(ctx->xsh, t, 1);
return rc;
}
static int store_libxl_entry(libxl__gc *gc, uint32_t domid,
libxl_domain_build_info *b_info)
{
char *path = NULL;
path = libxl__xs_libxl_path(gc, domid);
path = GCSPRINTF("%s/dm-version", path);
return libxl__xs_printf(gc, XBT_NULL, path, "%s",
libxl_device_model_version_to_string(b_info->device_model_version));
}
void libxl__domain_build_state_init(libxl__domain_build_state *state)
{
state->dm_monitor_fd = -1;
}
void libxl__domain_build_state_dispose(libxl__domain_build_state *state)
{
libxl__file_reference_unmap(&state->pv_kernel);
libxl__file_reference_unmap(&state->pv_ramdisk);
if (state->dm_monitor_fd >= 0) {
close(state->dm_monitor_fd);
state->dm_monitor_fd = -1;
}
}
/*----- main domain creation -----*/
/* We have a linear control flow; only one event callback is
* outstanding at any time. Each initiation and callback function
* arranges for the next to be called, as the very last thing it
* does. (If that particular sub-operation is not needed, a
* function will call the next event callback directly.)
*/
/* Event callbacks, in this order: */
static void domcreate_bootloader_console_available(libxl__egc *egc,
libxl__bootloader_state *bl);
static void domcreate_console_available(libxl__egc *egc,
libxl__domain_create_state *dcs);
static void domcreate_bootloader_done(libxl__egc *egc,
libxl__bootloader_state *bl,
int rc);
static void libxl__colo_restore_setup_done(libxl__egc *egc,
libxl__colo_restore_state *crs,
int rc);
static void domcreate_stream_done(libxl__egc *egc,
libxl__stream_read_state *srs,
int ret);
static void domcreate_rebuild_done(libxl__egc *egc,
libxl__domain_create_state *dcs,
int ret);
static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *aodevs,
int ret);
static void domcreate_devmodel_started(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int rc);
static void domcreate_attach_devices(libxl__egc *egc,
libxl__multidev *multidev,
int ret);
static void console_xswait_callback(libxl__egc *egc, libxl__xswait_state *xswa,
int rc, const char *p);
/* Our own function to clean up and call the user's callback.
* The final call in the sequence. */
static void domcreate_complete(libxl__egc *egc,
libxl__domain_create_state *dcs,
int rc);
/* If creation is not successful, this callback will be executed
* when domain destruction is finished */
static void domcreate_destruction_cb(libxl__egc *egc,
libxl__domain_destroy_state *dds,
int rc);
static bool ok_to_default_memkb_in_create(libxl__gc *gc)
{
/*
* This is a fudge. We are trying to find whether the caller
* calls the old version of libxl_domain_need_memory. If they do
* then, because it only gets the b_info, and because it can't
* update the b_info (because it's const), it will base its
* calculations on defaulting shadow_memkb and iommu_memkb to 0
* In that case we probably shouldn't default them differently
* during libxl_domain_create.
*
* The result is that the behaviour with old callers is the same
* as in 4.13: no additional memory is allocated for shadow and
* iommu (unless the caller set shadow_memkb, eg from a call to
* libxl_get_required_shadow_memory).
*/
return !CTX->libxl_domain_need_memory_0x041200_called ||
CTX->libxl_domain_need_memory_called;
/*
* Treat mixed callers as new callers. Presumably they know what
* they are doing.
*/
}
unsigned long libxl__get_required_paging_memory(unsigned long maxmem_kb,
unsigned int smp_cpus,
libxl_domain_type type,
bool hap)
{
/*
* 256 pages (1MB) per vcpu,
* plus 1 page per MiB of RAM for the P2M map (for non-PV guests),
* plus 1 page per MiB of RAM to shadow the resident processes (for shadow
* mode guests).
* plus 1 page per MiB of RAM for the architecture specific
* EXTRA_DEFAULT_PAGING_MEM_MB. On x86, this value is zero. On Arm, this
* value is 128 MiB to cover domain extended regions (enough for domains
* that are not running backend).
* This is higher than the minimum that Xen would allocate if no value
* were given (but the Xen minimum is for safety, not performance).
*/
return 4 * (256 * smp_cpus +
((type != LIBXL_DOMAIN_TYPE_PV) + !hap) *
(maxmem_kb / 1024) +
EXTRA_DEFAULT_PAGING_MEM_MB);
}
static unsigned long libxl__get_required_iommu_memory(unsigned long maxmem_kb)
{
unsigned long iommu_pages = 0, mem_pages = maxmem_kb / 4;
unsigned int level;
/* Assume a 4 level page table with 512 entries per level */
for (level = 0; level < 4; level++)
{
mem_pages = DIV_ROUNDUP(mem_pages, 512);
iommu_pages += mem_pages;
}
return iommu_pages * 4;
}
int libxl__domain_config_setdefault(libxl__gc *gc,
libxl_domain_config *d_config,
uint32_t domid /* for logging, only */)
{
libxl_ctx *ctx = libxl__gc_owner(gc);
int ret, i;
bool pod_enabled = false;
libxl_domain_create_info *c_info = &d_config->c_info;
libxl_physinfo physinfo;
ret = libxl_get_physinfo(CTX, &physinfo);
if (ret) goto error_out;
if (d_config->c_info.ssid_label) {
char *s = d_config->c_info.ssid_label;
ret = libxl_flask_context_to_sid(ctx, s, strlen(s),
&d_config->c_info.ssidref);
if (ret) {
if (errno != ENOSYS) {
LOGD(ERROR, domid, "Invalid init_seclabel: %s", s);
goto error_out;
}
LOGD(WARN, domid, "XSM Disabled: init_seclabel not supported");
}
}
if (d_config->b_info.exec_ssid_label) {
char *s = d_config->b_info.exec_ssid_label;
ret = libxl_flask_context_to_sid(ctx, s, strlen(s),
&d_config->b_info.exec_ssidref);
if (ret) {
if (errno != ENOSYS) {
LOGD(ERROR, domid, "Invalid seclabel: %s", s);
goto error_out;
}
LOGD(WARN, domid, "XSM Disabled: seclabel not supported");
}
}
if (d_config->b_info.device_model_ssid_label) {
char *s = d_config->b_info.device_model_ssid_label;
ret = libxl_flask_context_to_sid(ctx, s, strlen(s),
&d_config->b_info.device_model_ssidref);
if (ret) {
if (errno != ENOSYS) {
LOGD(ERROR, domid, "Invalid device_model_stubdomain_seclabel: %s", s);
goto error_out;
}
LOGD(WARN, domid,
"XSM Disabled: device_model_stubdomain_seclabel not supported");
}
}
if (d_config->c_info.pool_name) {
d_config->c_info.poolid = -1;
libxl_cpupool_qualifier_to_cpupoolid(ctx, d_config->c_info.pool_name,
&d_config->c_info.poolid,
NULL);
}
if (!libxl_cpupoolid_is_valid(ctx, d_config->c_info.poolid)) {
LOGD(ERROR, domid, "Illegal pool specified: %s",
d_config->c_info.pool_name);
ret = ERROR_INVAL;
goto error_out;
}
ret = libxl__domain_create_info_setdefault(gc, &d_config->c_info,
&physinfo);
if (ret) {
LOGD(ERROR, domid, "Unable to set domain create info defaults");
goto error_out;
}
/*
* Note: libxl_arm directly examines num_pcidevs to decide whether
* to create a vPCI DT node, rather than using c_info->passthrough.
* This will be insufficient if and when ARM does PCI hotplug.
*/
bool need_pt = d_config->num_pcidevs || d_config->num_dtdevs;
if (c_info->passthrough == LIBXL_PASSTHROUGH_DEFAULT) {
c_info->passthrough = need_pt
? LIBXL_PASSTHROUGH_ENABLED : LIBXL_PASSTHROUGH_DISABLED;
}
bool iommu_enabled = physinfo.cap_hvm_directio;
if (c_info->passthrough != LIBXL_PASSTHROUGH_DISABLED && !iommu_enabled) {
LOGD(ERROR, domid,
"passthrough not supported on this platform\n");
ret = ERROR_INVAL;
goto error_out;
}
if (c_info->passthrough == LIBXL_PASSTHROUGH_DISABLED && need_pt) {
LOGD(ERROR, domid,
"passthrough disabled but devices are specified");
ret = ERROR_INVAL;
goto error_out;
}
ret = libxl__arch_passthrough_mode_setdefault(gc,domid,d_config,&physinfo);
if (ret) goto error_out;
/* An explicit setting should now have been chosen */
assert(c_info->passthrough != LIBXL_PASSTHROUGH_DEFAULT);
assert(c_info->passthrough != LIBXL_PASSTHROUGH_ENABLED);
/* If target_memkb is smaller than max_memkb, the subsequent call
* to libxc when building HVM domain will enable PoD mode.
*/
pod_enabled = (d_config->c_info.type != LIBXL_DOMAIN_TYPE_PV) &&
(d_config->b_info.target_memkb < d_config->b_info.max_memkb);
/* We don't support having PoD and an IOMMU at the same time for HVM
* guests. An active IOMMU cannot work with PoD because it needs a fully
* populated page-table. Prevent PoD usage if the domain has an IOMMU
* assigned, even if not active.
*/
if (d_config->c_info.type != LIBXL_DOMAIN_TYPE_PV &&
d_config->c_info.passthrough != LIBXL_PASSTHROUGH_DISABLED &&
pod_enabled) {
ret = ERROR_INVAL;
LOGD(ERROR, domid,
"IOMMU required for device passthrough but not supported together with PoD");
goto error_out;
}
/* Disallow PoD and vNUMA to be enabled at the same time because PoD
* pool is not vNUMA-aware yet.
*/
if (pod_enabled && d_config->b_info.num_vnuma_nodes) {
ret = ERROR_INVAL;
LOGD(ERROR, domid, "Cannot enable PoD and vNUMA at the same time");
goto error_out;
}
/* PV vNUMA is not yet supported because there is an issue with
* cpuid handling.
*/
if (d_config->c_info.type == LIBXL_DOMAIN_TYPE_PV &&
d_config->b_info.num_vnuma_nodes) {
ret = ERROR_INVAL;
LOGD(ERROR, domid, "PV vNUMA is not yet supported");
goto error_out;
}
if (d_config->b_info.shadow_memkb == LIBXL_MEMKB_DEFAULT
&& ok_to_default_memkb_in_create(gc)) {
bool hap = d_config->c_info.type != LIBXL_DOMAIN_TYPE_PV &&
libxl_defbool_val(d_config->c_info.hap);
d_config->b_info.shadow_memkb =
libxl__get_required_paging_memory(d_config->b_info.max_memkb,
d_config->b_info.max_vcpus,
d_config->c_info.type,
hap);
}
/* No IOMMU reservation is needed if passthrough mode is not 'sync_pt' */
if (d_config->b_info.iommu_memkb == LIBXL_MEMKB_DEFAULT
&& ok_to_default_memkb_in_create(gc))
d_config->b_info.iommu_memkb =
(d_config->c_info.passthrough == LIBXL_PASSTHROUGH_SYNC_PT)
? libxl__get_required_iommu_memory(d_config->b_info.max_memkb)
: 0;
ret = libxl__domain_build_info_setdefault(gc, &d_config->b_info);
if (ret) {
LOGD(ERROR, domid, "Unable to set domain build info defaults");
goto error_out;
}
if (d_config->c_info.type != LIBXL_DOMAIN_TYPE_PV &&
(libxl_defbool_val(d_config->b_info.nested_hvm) &&
((d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM &&
libxl_defbool_val(d_config->b_info.u.hvm.altp2m)) ||
(d_config->b_info.altp2m != LIBXL_ALTP2M_MODE_DISABLED)))) {
ret = ERROR_INVAL;
LOGD(ERROR, domid, "nestedhvm and altp2mhvm cannot be used together");
goto error_out;
}
if (((d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM &&
libxl_defbool_val(d_config->b_info.u.hvm.altp2m)) ||
(d_config->c_info.type != LIBXL_DOMAIN_TYPE_PV &&
d_config->b_info.altp2m != LIBXL_ALTP2M_MODE_DISABLED)) &&
pod_enabled) {
ret = ERROR_INVAL;
LOGD(ERROR, domid, "Cannot enable PoD and ALTP2M at the same time");
goto error_out;
}
if (libxl_defbool_val(d_config->b_info.vpmu) && !physinfo.cap_vpmu) {
ret = ERROR_INVAL;
LOGD(ERROR, domid, "vPMU not supported on this platform");
goto error_out;
}
for (i = 0; i < d_config->num_virtios; i++) {
ret = libxl__virtio_devtype.set_default(gc, domid,
&d_config->virtios[i], false);
if (ret) {
LOGD(ERROR, domid, "Unable to set virtio defaults for device %d", i);
goto error_out;
}
}
ret = 0;
error_out:
return ret;
}
static void initiate_domain_create(libxl__egc *egc,
libxl__domain_create_state *dcs)
{
STATE_AO_GC(dcs->ao);
uint32_t domid;
int i, ret;
/* convenience aliases */
libxl_domain_config *const d_config = dcs->guest_config;
libxl__domain_build_state *dbs = &dcs->build_state;
domid = dcs->domid;
libxl__domain_build_state_init(dbs);
dbs->restore = dcs->restore_fd >= 0;
ret = libxl__domain_config_setdefault(gc,d_config,domid);
if (ret) goto error_out;
ret = libxl__domain_make(gc, d_config, dbs, &domid, dcs->soft_reset);
if (ret) {
LOGD(ERROR, domid, "cannot make domain: %d", ret);
dcs->guest_domid = domid;
ret = ERROR_FAIL;
goto error_out;
}
dcs->guest_domid = domid;
dcs->sdss.dm.guest_domid = 0; /* means we haven't spawned */
/* post-4.13 todo: move these next bits of defaulting to
* libxl__domain_config_setdefault */
/*
* Set the dm version quite early so that libxl doesn't have to pass the
* build info around just to know if the domain has a device model or not.
*/
store_libxl_entry(gc, domid, &d_config->b_info);
for (i = 0; i < d_config->num_disks; i++) {
ret = libxl__disk_devtype.set_default(gc, domid, &d_config->disks[i],
false);
if (ret) {
LOGD(ERROR, domid, "Unable to set disk defaults for disk %d", i);
goto error_out;
}
}
dcs->bl.ao = ao;
libxl_device_disk *bootdisk =
d_config->num_disks > 0 ? &d_config->disks[0] : NULL;
/*
* The devid has to be set before launching the device model. For the
* hotplug case this is done in libxl_device_nic_add but on domain
* creation this is called too late.
* Make two runs over configured NICs in order to avoid duplicate IDs
* in case the caller partially assigned IDs.
*/
ret = libxl__device_nic_set_devids(gc, d_config, domid);
if (ret)
goto error_out;
if (dbs->restore || dcs->soft_reset) {
LOGD(DEBUG, domid, "restoring, not running bootloader");
domcreate_bootloader_done(egc, &dcs->bl, 0);
} else {
LOGD(DEBUG, domid, "running bootloader");
dcs->bl.callback = domcreate_bootloader_done;
dcs->bl.console_available = domcreate_bootloader_console_available;
dcs->bl.info = &d_config->b_info;
dcs->bl.disk = bootdisk;
dcs->bl.domid = dcs->guest_domid;
dcs->bl.kernel = &dbs->pv_kernel;
dcs->bl.ramdisk = &dbs->pv_ramdisk;
libxl__bootloader_run(egc, &dcs->bl);
}
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_bootloader_console_available(libxl__egc *egc,
libxl__bootloader_state *bl)
{
libxl__domain_create_state *dcs = CONTAINER_OF(bl, *dcs, bl);
STATE_AO_GC(bl->ao);
domcreate_console_available(egc, dcs);
}
static void domcreate_console_available(libxl__egc *egc,
libxl__domain_create_state *dcs) {
libxl__ao_progress_report(egc, dcs->ao, &dcs->aop_console_how,
NEW_EVENT(egc, DOMAIN_CREATE_CONSOLE_AVAILABLE,
dcs->guest_domid,
dcs->aop_console_how.for_event));
}
static void domcreate_bootloader_done(libxl__egc *egc,
libxl__bootloader_state *bl,
int rc)
{
libxl__domain_create_state *dcs = CONTAINER_OF(bl, *dcs, bl);
STATE_AO_GC(bl->ao);
/* convenience aliases */
const uint32_t domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
const int restore_fd = dcs->restore_fd;
libxl__domain_build_state *const state = &dcs->build_state;
const int checkpointed_stream = dcs->restore_params.checkpointed_stream;
libxl__colo_restore_state *const crs = &dcs->crs;
libxl_domain_build_info *const info = &d_config->b_info;
libxl__srm_restore_autogen_callbacks *const callbacks =
&dcs->srs.shs.callbacks.restore.a;
if (rc) {
domcreate_rebuild_done(egc, dcs, rc);
return;
}
/* consume bootloader outputs. state->pv_{kernel,ramdisk} have
* been initialised by the bootloader already.
*/
state->pv_cmdline = bl->cmdline;
/* We might be going to call libxl__spawn_local_dm, or _spawn_stub_dm.
* Fill in any field required by either, including both relevant
* callbacks (_spawn_stub_dm will overwrite our trespass if needed). */
dcs->sdss.dm.spawn.ao = ao;
dcs->sdss.dm.guest_config = dcs->guest_config;
dcs->sdss.dm.build_state = &dcs->build_state;
dcs->sdss.dm.callback = domcreate_devmodel_started;
dcs->sdss.callback = domcreate_devmodel_started;
if (restore_fd < 0 && !dcs->soft_reset) {
rc = libxl__domain_build(gc, d_config, domid, state);
domcreate_rebuild_done(egc, dcs, rc);
return;
}
/* Prepare environment for domcreate_stream_done */
dcs->srs.dcs = dcs;
/* Restore */
callbacks->static_data_done = libxl__srm_callout_callback_static_data_done;
callbacks->restore_results = libxl__srm_callout_callback_restore_results;
/* COLO only supports HVM now because it does not work very
* well with pv drivers:
* 1. We need to resume vm in the slow path. In this case we
* need to disconnect/reconnect backend and frontend. It
* will take too much time and the performance is very slow.
* 2. PV disk cannot reuse block replication that is implemented
* in QEMU.
*/
if (info->type != LIBXL_DOMAIN_TYPE_HVM &&
checkpointed_stream == LIBXL_CHECKPOINTED_STREAM_COLO) {
LOGD(ERROR, domid, "COLO only supports HVM, unable to restore domain");
rc = ERROR_FAIL;
goto out;
}
rc = libxl__build_pre(gc, domid, d_config, state);
if (rc)
goto out;
dcs->srs.ao = ao;
dcs->srs.fd = restore_fd;
dcs->srs.legacy = (dcs->restore_params.stream_version == 1);
dcs->srs.back_channel = false;
dcs->srs.completion_callback = domcreate_stream_done;
if (restore_fd >= 0) {
switch (checkpointed_stream) {
case LIBXL_CHECKPOINTED_STREAM_COLO:
/* colo restore setup */
crs->ao = ao;
crs->domid = domid;
crs->send_back_fd = dcs->send_back_fd;
crs->recv_fd = restore_fd;
crs->hvm = (info->type != LIBXL_DOMAIN_TYPE_PV);
crs->callback = libxl__colo_restore_setup_done;
libxl__colo_restore_setup(egc, crs);
break;
case LIBXL_CHECKPOINTED_STREAM_REMUS:
libxl__remus_restore_setup(egc, dcs);
/* fall through */
case LIBXL_CHECKPOINTED_STREAM_NONE:
libxl__stream_read_start(egc, &dcs->srs);
}
return;
}
out:
domcreate_stream_done(egc, &dcs->srs, rc);
}
static void libxl__colo_restore_setup_done(libxl__egc *egc,
libxl__colo_restore_state *crs,
int rc)
{
libxl__domain_create_state *dcs = CONTAINER_OF(crs, *dcs, crs);
EGC_GC;
if (rc) {
LOGD(ERROR, dcs->guest_domid, "colo restore setup fails: %d", rc);
domcreate_stream_done(egc, &dcs->srs, rc);
return;
}
libxl__stream_read_start(egc, &dcs->srs);
}
int libxl__srm_callout_callback_static_data_done(unsigned int missing,
void *user)
{
libxl__save_helper_state *shs = user;
libxl__domain_create_state *dcs = shs->caller_state;
STATE_AO_GC(dcs->ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
libxl_domain_config *d_config = dcs->guest_config;
libxl_domain_build_info *info = &d_config->b_info;
int rc = 0;
/*
* CPUID/MSR information is not present in pre Xen-4.14 streams.
*
* Libxl used to always regenerate the CPUID policy from first principles
* on migrate. Continue to do so for backwards compatibility when the
* stream doesn't contain any CPUID data.
*/
if (missing & XGR_SDD_MISSING_CPUID)
rc = libxl__cpuid_legacy(ctx, dcs->guest_domid, true, info);
return rc;
}
void libxl__srm_callout_callback_restore_results(xen_pfn_t store_mfn,
xen_pfn_t console_mfn, void *user)
{
libxl__save_helper_state *shs = user;
libxl__domain_create_state *dcs = shs->caller_state;
STATE_AO_GC(dcs->ao);
libxl__domain_build_state *const state = &dcs->build_state;
state->store_mfn = store_mfn;
state->console_mfn = console_mfn;
shs->need_results = 0;
}
static void domcreate_stream_done(libxl__egc *egc,
libxl__stream_read_state *srs,
int ret)
{
/* NB perhaps only srs->dcs is valid; eg in the case of an
* early branch to domcreate_bootloader_done's `out' block */
libxl__domain_create_state *dcs = srs->dcs;
STATE_AO_GC(dcs->ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
char **vments = NULL, **localents = NULL;
struct timeval start_time;
int i, esave;
/* convenience aliases */
const uint32_t domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
libxl_domain_build_info *const info = &d_config->b_info;
libxl__domain_build_state *const state = &dcs->build_state;
const int fd = dcs->restore_fd;
if (ret)
goto out;
gettimeofday(&start_time, NULL);
switch (info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
vments = libxl__calloc(gc, 7, sizeof(char *));
vments[0] = "rtc/timeoffset";
vments[1] = (info->u.hvm.timeoffset) ? info->u.hvm.timeoffset : "";
vments[2] = "image/ostype";
vments[3] = "hvm";
vments[4] = "start_time";
vments[5] = GCSPRINTF("%jd.%02d", (intmax_t)start_time.tv_sec,(int)start_time.tv_usec/10000);
break;
case LIBXL_DOMAIN_TYPE_PV:
vments = libxl__calloc(gc, 11, sizeof(char *));
i = 0;
vments[i++] = "image/ostype";
vments[i++] = "linux";
vments[i++] = "image/kernel";
vments[i++] = (char *) state->pv_kernel.path;
vments[i++] = "start_time";
vments[i++] = GCSPRINTF("%jd.%02d", (intmax_t)start_time.tv_sec,(int)start_time.tv_usec/10000);
if (state->pv_ramdisk.path) {
vments[i++] = "image/ramdisk";
vments[i++] = (char *) state->pv_ramdisk.path;
}
if (state->pv_cmdline) {
vments[i++] = "image/cmdline";
vments[i++] = (char *) state->pv_cmdline;
}
break;
case LIBXL_DOMAIN_TYPE_PVH:
vments = libxl__calloc(gc, 3, sizeof(char *));
vments[0] = "start_time";
vments[1] = GCSPRINTF("%"PRIu64".%02ld",
(uint64_t)start_time.tv_sec,
(long)start_time.tv_usec/10000);
break;
default:
ret = ERROR_INVAL;
goto out;
}
/*
* The scheduler on the sending domain may be different than the
* scheduler running here. Setting the scheduler to UNKNOWN will
* cause the code to take to take whatever parameters are
* available in that scheduler, while discarding the rest.
*/
info->sched_params.sched = LIBXL_SCHEDULER_UNKNOWN;
ret = libxl__build_post(gc, domid, info, state, vments, localents);
if (ret)
goto out;
if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
state->saved_state = GCSPRINTF(
LIBXL_DEVICE_MODEL_RESTORE_FILE".%d", domid);
}
out:
if (info->type == LIBXL_DOMAIN_TYPE_PV) {
libxl__file_reference_unmap(&state->pv_kernel);
libxl__file_reference_unmap(&state->pv_ramdisk);
}
/* fd == -1 here means we're doing soft reset. */
if (fd != -1) {
esave = errno;
libxl_fd_set_nonblock(ctx, fd, 0);
errno = esave;
}
domcreate_rebuild_done(egc, dcs, ret);
}
static void domcreate_rebuild_done(libxl__egc *egc,
libxl__domain_create_state *dcs,
int ret)
{
STATE_AO_GC(dcs->ao);
/* convenience aliases */
const uint32_t domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
if (ret) {
LOGD(ERROR, domid, "cannot (re-)build domain: %d", ret);
ret = ERROR_FAIL;
goto error_out;
}
store_libxl_entry(gc, domid, &d_config->b_info);
libxl__multidev_begin(ao, &dcs->multidev);
dcs->multidev.callback = domcreate_launch_dm;
libxl__add_disks(egc, ao, domid, d_config, &dcs->multidev);
libxl__multidev_prepared(egc, &dcs->multidev, 0);
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *multidev,
int ret)
{
libxl__domain_create_state *dcs = CONTAINER_OF(multidev, *dcs, multidev);
STATE_AO_GC(dcs->ao);
int i;
/* convenience aliases */
const uint32_t domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
libxl__domain_build_state *const state = &dcs->build_state;
if (ret) {
LOGD(ERROR, domid, "unable to add disk devices");
goto error_out;
}
for (i = 0; i < d_config->b_info.num_ioports; i++) {
libxl_ioport_range *io = &d_config->b_info.ioports[i];
LOGD(DEBUG, domid, "ioports %"PRIx32"-%"PRIx32,
io->first, io->first + io->number - 1);
ret = xc_domain_ioport_permission(CTX->xch, domid,
io->first, io->number, 1);
if (ret < 0) {
LOGED(ERROR, domid,
"failed give domain access to ioports %"PRIx32"-%"PRIx32,
io->first, io->first + io->number - 1);
ret = ERROR_FAIL;
goto error_out;
}
}
for (i = 0; i < d_config->b_info.num_irqs; i++) {
int irq = d_config->b_info.irqs[i];
LOGD(DEBUG, domid, "irq %d", irq);
ret = irq >= 0 ? libxl__arch_domain_map_irq(gc, domid, irq)
: -EOVERFLOW;
if (ret) {
LOGED(ERROR, domid, "failed give domain access to irq %d", irq);
ret = ERROR_FAIL;
goto error_out;
}
}
for (i = 0; i < d_config->b_info.num_iomem; i++) {
libxl_iomem_range *io = &d_config->b_info.iomem[i];
LOGD(DEBUG, domid, "iomem %"PRIx64"-%"PRIx64,
io->start, io->start + io->number - 1);
ret = xc_domain_iomem_permission(CTX->xch, domid,
io->start, io->number, 1);
if (ret < 0) {
LOGED(ERROR, domid,
"failed give domain access to iomem range %"PRIx64"-%"PRIx64,
io->start, io->start + io->number - 1);
ret = ERROR_FAIL;
goto error_out;
}
ret = xc_domain_memory_mapping(CTX->xch, domid,
io->gfn, io->start,
io->number, 1);
if (ret < 0) {
LOGED(ERROR, domid,
"failed to map to domain iomem range %"PRIx64"-%"PRIx64
" to guest address %"PRIx64,
io->start, io->start + io->number - 1, io->gfn);
ret = ERROR_FAIL;
goto error_out;
}
}
/* For both HVM and PV the 0th console is a regular console. We
map channels to IOEMU consoles starting at 1 */
for (i = 0; i < d_config->num_channels; i++) {
libxl__device_console console;
libxl__device device;
ret = libxl__init_console_from_channel(gc, &console, i + 1,
&d_config->channels[i]);
if ( ret ) {
libxl__device_console_dispose(&console);
goto error_out;
}
libxl__device_console_add(gc, domid, &console, NULL, &device);
libxl__device_console_dispose(&console);
}
for (i = 0; i < d_config->num_pvcallsifs; i++)
libxl__device_add(gc, domid, &libxl__pvcallsif_devtype,
&d_config->pvcallsifs[i]);
for (i = 0; i < d_config->num_virtios; i++)
libxl__device_add(gc, domid, &libxl__virtio_devtype,
&d_config->virtios[i]);
if (d_config->num_vkbs) {
for (i = 0; i < d_config->num_vkbs; i++) {
ret = libxl__device_add(gc, domid, &libxl__vkb_devtype,
&d_config->vkbs[i]);
if (ret) goto error_out;
}
} else if (d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM &&
libxl_defbool_val(d_config->b_info.u.hvm.vkb_device)) {
libxl_device_vkb vkb;
libxl_device_vkb_init(&vkb);
libxl__device_add(gc, domid, &libxl__vkb_devtype, &vkb);
libxl_device_vkb_dispose(&vkb);
}
switch (d_config->c_info.type) {
case LIBXL_DOMAIN_TYPE_HVM:
{
libxl__device_console console;
libxl__device device;
init_console_info(gc, &console, 0);
console.backend_domid = state->console_domid;
libxl__device_console_add(gc, domid, &console, state, &device);
libxl__device_console_dispose(&console);
dcs->sdss.dm.guest_domid = domid;
if (libxl_defbool_val(d_config->b_info.device_model_stubdomain))
libxl__spawn_stub_dm(egc, &dcs->sdss);
else
libxl__spawn_local_dm(egc, &dcs->sdss.dm);
/*
* Handle the domain's (and the related stubdomain's) access to
* the VGA framebuffer.
*/
ret = libxl__grant_vga_iomem_permission(gc, domid, d_config);
if ( ret )
goto error_out;
return;
}
case LIBXL_DOMAIN_TYPE_PV:
case LIBXL_DOMAIN_TYPE_PVH:
{
libxl__device_console console, vuart;
libxl__device device;
for (i = 0; i < d_config->num_vfbs; i++) {
libxl__device_add(gc, domid, &libxl__vfb_devtype,
&d_config->vfbs[i]);
}
if (d_config->b_info.arch_arm.vuart == LIBXL_VUART_TYPE_SBSA_UART) {
init_console_info(gc, &vuart, 0);
vuart.backend_domid = state->console_domid;
libxl__device_vuart_add(gc, domid, &vuart, state);
libxl__device_console_dispose(&vuart);
}
init_console_info(gc, &console, 0);
console.backend_domid = state->console_domid;
libxl__device_console_add(gc, domid, &console, state, &device);
libxl__device_console_dispose(&console);
ret = libxl__need_xenpv_qemu(gc, d_config);
if (ret < 0)
goto error_out;
if (ret) {
dcs->sdss.dm.guest_domid = domid;
libxl__spawn_local_dm(egc, &dcs->sdss.dm);
return;
} else {
assert(!dcs->sdss.dm.guest_domid);
domcreate_devmodel_started(egc, &dcs->sdss.dm, 0);
return;
}
}
default:
ret = ERROR_INVAL;
goto error_out;
}
abort(); /* not reached */
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void libxl__add_dtdevs(libxl__egc *egc, libxl__ao *ao, uint32_t domid,
libxl_domain_config *d_config,
libxl__multidev *multidev)
{
AO_GC;
libxl__ao_device *aodev = libxl__multidev_prepare(multidev);
int i, rc = 0;
for (i = 0; i < d_config->num_dtdevs; i++) {
const libxl_device_dtdev *dtdev = &d_config->dtdevs[i];
LOGD(DEBUG, domid, "Assign device \"%s\" to domain", dtdev->path);
rc = xc_assign_dt_device(CTX->xch, domid, dtdev->path);
if (rc < 0) {
LOGD(ERROR, domid, "xc_assign_dtdevice failed: %d", rc);
goto out;
}
}
out:
aodev->rc = rc;
aodev->callback(egc, aodev);
}
#define libxl_device_dtdev_list NULL
#define libxl_device_dtdev_compare NULL
#define libxl__device_from_dtdev NULL
#define libxl__device_dtdev_setdefault NULL
#define libxl__device_dtdev_update_devid NULL
static DEFINE_DEVICE_TYPE_STRUCT(dtdev, NONE, dtdevs);
const libxl__device_type *device_type_tbl[] = {
&libxl__disk_devtype,
&libxl__nic_devtype,
&libxl__vtpm_devtype,
&libxl__usbctrl_devtype,
&libxl__usbdev_devtype,
&libxl__pci_devtype,
&libxl__dtdev_devtype,
&libxl__vdispl_devtype,
&libxl__vsnd_devtype,
&libxl__virtio_devtype,
&libxl__p9_devtype,
NULL
};
static void domcreate_devmodel_started(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int ret)
{
libxl__domain_create_state *dcs = CONTAINER_OF(dmss, *dcs, sdss.dm);
STATE_AO_GC(dmss->spawn.ao);
int domid = dcs->guest_domid;
if (ret) {
LOGD(ERROR, domid, "device model did not start: %d", ret);
goto error_out;
}
dcs->device_type_idx = -1;
domcreate_attach_devices(egc, &dcs->multidev, 0);
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_attach_devices(libxl__egc *egc,
libxl__multidev *multidev,
int ret)
{
libxl__domain_create_state *dcs = CONTAINER_OF(multidev, *dcs, multidev);
STATE_AO_GC(dcs->ao);
int domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
const libxl__device_type *dt;
char *tty_path;
if (ret) {
LOGD(ERROR, domid, "unable to add %s devices",
libxl__device_kind_to_string(device_type_tbl[dcs->device_type_idx]->type));
goto error_out;
}
dcs->device_type_idx++;
dt = device_type_tbl[dcs->device_type_idx];
if (dt) {
if (*libxl__device_type_get_num(dt, d_config) > 0 && !dt->skip_attach) {
/* Attach devices */
libxl__multidev_begin(ao, &dcs->multidev);
dcs->multidev.callback = domcreate_attach_devices;
dt->add(egc, ao, domid, d_config, &dcs->multidev);
libxl__multidev_prepared(egc, &dcs->multidev, 0);
return;
}
domcreate_attach_devices(egc, &dcs->multidev, 0);
return;
}
ret = libxl__console_tty_path(gc, domid, 0, LIBXL_CONSOLE_TYPE_PV, &tty_path);
if (ret) {
LOG(ERROR, "failed to get domain %d console tty path",
domid);
goto error_out;
}
dcs->console_xswait.ao = ao;
dcs->console_xswait.what = GCSPRINTF("domain %d console tty", domid);
dcs->console_xswait.path = tty_path;
dcs->console_xswait.timeout_ms = LIBXL_INIT_TIMEOUT * 1000;
dcs->console_xswait.callback = console_xswait_callback;
ret = libxl__xswait_start(gc, &dcs->console_xswait);
if (ret) {
LOG(ERROR, "unable to set up watch for domain %d console tty path",
domid);
goto error_out;
}
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void console_xswait_callback(libxl__egc *egc, libxl__xswait_state *xswa,
int rc, const char *p)
{
EGC_GC;
libxl__domain_create_state *dcs = CONTAINER_OF(xswa, *dcs, console_xswait);
if (rc) {
if (rc == ERROR_TIMEDOUT)
LOG(ERROR, "%s: timed out", xswa->what);
goto out;
}
if (p && p[0] != '\0') {
domcreate_console_available(egc, dcs);
goto out;
}
return;
out:
libxl__xswait_stop(gc, xswa);
domcreate_complete(egc, dcs, rc);
}
static void domcreate_complete(libxl__egc *egc,
libxl__domain_create_state *dcs,
int rc)
{
STATE_AO_GC(dcs->ao);
libxl_domain_config *const d_config = dcs->guest_config;
libxl_domain_config *d_config_saved = &dcs->guest_config_saved;
libxl__xswait_stop(gc, &dcs->console_xswait);
libxl__domain_build_state_dispose(&dcs->build_state);
if (!rc && d_config->b_info.exec_ssidref)
rc = xc_flask_relabel_domain(CTX->xch, dcs->guest_domid, d_config->b_info.exec_ssidref);
bool retain_domain = !rc || rc == ERROR_ABORTED;
if (retain_domain) {
libxl__flock *lock;
/* Note that we hold CTX lock at this point so only need to
* take data store lock
*/
lock = libxl__lock_domain_userdata(gc, dcs->guest_domid);
if (!lock) {
rc = ERROR_LOCK_FAIL;
} else {
libxl__update_domain_configuration(gc, d_config_saved, d_config);
int cfg_rc = libxl__set_domain_configuration
(gc, dcs->guest_domid, d_config_saved);
if (!rc)
rc = cfg_rc;
libxl__unlock_file(lock);
}
}
libxl_domain_config_dispose(d_config_saved);
if (!retain_domain) {
if (dcs->guest_domid > 0) {
dcs->dds.ao = ao;
dcs->dds.domid = dcs->guest_domid;
dcs->dds.callback = domcreate_destruction_cb;
libxl__domain_destroy(egc, &dcs->dds);
return;
}
dcs->guest_domid = INVALID_DOMID;
}
dcs->callback(egc, dcs, rc, dcs->guest_domid);
}
static void domcreate_destruction_cb(libxl__egc *egc,
libxl__domain_destroy_state *dds,
int rc)
{
STATE_AO_GC(dds->ao);
libxl__domain_create_state *dcs = CONTAINER_OF(dds, *dcs, dds);
if (rc)
LOGD(ERROR, dds->domid, "unable to destroy domain following failed creation");
dcs->callback(egc, dcs, ERROR_FAIL, dcs->guest_domid);
}
/*----- application-facing domain creation interface -----*/
typedef struct {
libxl__domain_create_state dcs;
uint32_t *domid_out;
} libxl__app_domain_create_state;
typedef struct {
libxl__app_domain_create_state cdcs;
libxl__domain_destroy_state dds;
libxl__domain_save_state dss;
char *toolstack_buf;
uint32_t toolstack_len;
} libxl__domain_soft_reset_state;
static void domain_create_cb(libxl__egc *egc,
libxl__domain_create_state *dcs,
int rc, uint32_t domid);
static int do_domain_create(libxl_ctx *ctx, libxl_domain_config *d_config,
uint32_t *domid, int restore_fd, int send_back_fd,
const libxl_domain_restore_params *params,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how *aop_console_how)
{
AO_CREATE(ctx, 0, ao_how);
libxl__app_domain_create_state *cdcs;
int rc;
GCNEW(cdcs);
cdcs->dcs.ao = ao;
cdcs->dcs.guest_config = d_config;
libxl_domain_config_init(&cdcs->dcs.guest_config_saved);
libxl_domain_config_copy(ctx, &cdcs->dcs.guest_config_saved, d_config);
cdcs->dcs.restore_fd = cdcs->dcs.libxc_fd = restore_fd;
cdcs->dcs.send_back_fd = send_back_fd;
if (restore_fd >= 0) {
cdcs->dcs.restore_params = *params;
rc = libxl__fd_flags_modify_save(gc, cdcs->dcs.restore_fd,
~(O_NONBLOCK|O_NDELAY), 0,
&cdcs->dcs.restore_fdfl);
if (rc < 0) goto out_err;
}
cdcs->dcs.callback = domain_create_cb;
cdcs->dcs.domid = INVALID_DOMID;
cdcs->dcs.soft_reset = false;
libxl__xswait_init(&cdcs->dcs.console_xswait);
if (cdcs->dcs.restore_params.checkpointed_stream ==
LIBXL_CHECKPOINTED_STREAM_COLO) {
cdcs->dcs.colo_proxy_script =
cdcs->dcs.restore_params.colo_proxy_script;
cdcs->dcs.crs.cps.is_userspace_proxy =
libxl_defbool_val(cdcs->dcs.restore_params.userspace_colo_proxy);
} else {
cdcs->dcs.colo_proxy_script = NULL;
cdcs->dcs.crs.cps.is_userspace_proxy = false;
}
libxl__ao_progress_gethow(&cdcs->dcs.aop_console_how, aop_console_how);
cdcs->domid_out = domid;
initiate_domain_create(egc, &cdcs->dcs);
return AO_INPROGRESS;
out_err:
return AO_CREATE_FAIL(rc);
}
static void domain_soft_reset_cb(libxl__egc *egc,
libxl__domain_destroy_state *dds,
int rc)
{
STATE_AO_GC(dds->ao);
libxl__domain_soft_reset_state *srs = CONTAINER_OF(dds, *srs, dds);
libxl__app_domain_create_state *cdcs = &srs->cdcs;
char *savefile, *restorefile;
if (rc) {
LOGD(ERROR, dds->domid, "destruction of domain failed.");
goto error;
}
cdcs->dcs.guest_domid = dds->domid;
rc = libxl__restore_emulator_xenstore_data(&cdcs->dcs, srs->toolstack_buf,
srs->toolstack_len);
if (rc) {
LOGD(ERROR, dds->domid, "failed to restore toolstack record.");
goto error;
}
if (cdcs->dcs.guest_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM) {
savefile = GCSPRINTF(LIBXL_DEVICE_MODEL_SAVE_FILE".%d", dds->domid);
restorefile = GCSPRINTF(LIBXL_DEVICE_MODEL_RESTORE_FILE".%d",
dds->domid);
rc = rename(savefile, restorefile);
if (rc) {
LOGD(ERROR, dds->domid, "failed to rename dm save file.");
goto error;
}
}
initiate_domain_create(egc, &cdcs->dcs);
return;
error:
domcreate_complete(egc, &cdcs->dcs, rc);
}
static void soft_reset_dm_suspended(libxl__egc *egc,
libxl__domain_suspend_state *dsps,
int rc);
static int do_domain_soft_reset(libxl_ctx *ctx,
libxl_domain_config *d_config,
uint32_t domid,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how
*aop_console_how)
{
AO_CREATE(ctx, 0, ao_how);
libxl__domain_soft_reset_state *srs;
libxl__app_domain_create_state *cdcs;
libxl__domain_create_state *dcs;
libxl__domain_build_state *state;
libxl__domain_save_state *dss;
const char *console_tty, *xs_store_mfn, *xs_console_mfn;
char *dom_path;
uint32_t domid_out;
int rc;
GCNEW(srs);
cdcs = &srs->cdcs;
dcs = &cdcs->dcs;
state = &dcs->build_state;
dss = &srs->dss;
srs->cdcs.dcs.ao = ao;
srs->cdcs.dcs.guest_config = d_config;
libxl_domain_config_init(&srs->cdcs.dcs.guest_config_saved);
libxl_domain_config_copy(ctx, &srs->cdcs.dcs.guest_config_saved,
d_config);
cdcs->dcs.restore_fd = -1;
cdcs->dcs.domid = domid;
cdcs->dcs.soft_reset = true;
cdcs->dcs.callback = domain_create_cb;
libxl__xswait_init(&cdcs->dcs.console_xswait);
libxl__ao_progress_gethow(&srs->cdcs.dcs.aop_console_how,
aop_console_how);
cdcs->domid_out = &domid_out;
state->soft_reset = true;
dom_path = libxl__xs_get_dompath(gc, domid);
if (!dom_path) {
LOGD(ERROR, domid, "failed to read domain path");
rc = ERROR_FAIL;
goto out;
}
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/store/ring-ref", dom_path),
&xs_store_mfn);
if (rc) {
LOGD(ERROR, domid, "failed to read store/ring-ref.");
goto out;
}
state->store_mfn = xs_store_mfn ? atol(xs_store_mfn): 0;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/console/ring-ref", dom_path),
&xs_console_mfn);
if (rc) {
LOGD(ERROR, domid, "failed to read console/ring-ref.");
goto out;
}
state->console_mfn = xs_console_mfn ? atol(xs_console_mfn): 0;
rc = libxl__xs_read_mandatory(gc, XBT_NULL,
GCSPRINTF("%s/console/tty", dom_path),
&console_tty);
if (rc) {
LOGD(ERROR, domid, "failed to read console/tty.");
goto out;
}
state->console_tty = libxl__strdup(gc, console_tty);
dss->ao = ao;
dss->domid = domid;
rc = libxl__save_emulator_xenstore_data(dss, &srs->toolstack_buf,
&srs->toolstack_len);
if (rc) {
LOGD(ERROR, domid, "failed to save toolstack record.");
goto out;
}
dss->dsps.ao = ao;
dss->dsps.domid = domid;
dss->dsps.live = false;
rc = libxl__domain_suspend_init(egc, &dss->dsps, d_config->b_info.type);
if (rc)
goto out;
dss->dsps.callback_device_model_done = soft_reset_dm_suspended;
libxl__domain_suspend_device_model(egc, &dss->dsps); /* must be last */
return AO_INPROGRESS;
out:
return AO_CREATE_FAIL(rc);
}
static void soft_reset_dm_suspended(libxl__egc *egc,
libxl__domain_suspend_state *dsps,
int rc)
{
STATE_AO_GC(dsps->ao);
libxl__domain_soft_reset_state *srs =
CONTAINER_OF(dsps, *srs, dss.dsps);
libxl__app_domain_create_state *cdcs = &srs->cdcs;
libxl__domain_suspend_dispose(gc, dsps);
/*
* Ask all backends to disconnect by removing the domain from
* xenstore. On the creation path the domain will be introduced to
* xenstore again with probably different store/console/...
* channels.
*/
xs_release_domain(CTX->xsh, cdcs->dcs.domid);
srs->dds.ao = ao;
srs->dds.domid = cdcs->dcs.domid;
srs->dds.callback = domain_soft_reset_cb;
srs->dds.soft_reset = true;
libxl__domain_destroy(egc, &srs->dds);
}
static void domain_create_cb(libxl__egc *egc,
libxl__domain_create_state *dcs,
int rc, uint32_t domid)
{
libxl__app_domain_create_state *cdcs = CONTAINER_OF(dcs, *cdcs, dcs);
int flrc;
STATE_AO_GC(cdcs->dcs.ao);
*cdcs->domid_out = domid;
if (dcs->restore_fd >= 0) {
flrc = libxl__fd_flags_restore(gc,
dcs->restore_fd, dcs->restore_fdfl);
/*
* If restore has failed already then report that error not
* this one.
*/
if (flrc && !rc) rc = flrc;
}
libxl__ao_complete(egc, ao, rc);
}
static void set_disk_colo_restore(libxl_domain_config *d_config)
{
int i;
for (i = 0; i < d_config->num_disks; i++)
libxl_defbool_set(&d_config->disks[i].colo_restore_enable, true);
}
static void unset_disk_colo_restore(libxl_domain_config *d_config)
{
int i;
for (i = 0; i < d_config->num_disks; i++)
libxl_defbool_set(&d_config->disks[i].colo_restore_enable, false);
}
int libxl_domain_create_new(libxl_ctx *ctx, libxl_domain_config *d_config,
uint32_t *domid,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how *aop_console_how)
{
unset_disk_colo_restore(d_config);
return do_domain_create(ctx, d_config, domid, -1, -1, NULL,
ao_how, aop_console_how);
}
int libxl_domain_create_restore(libxl_ctx *ctx, libxl_domain_config *d_config,
uint32_t *domid, int restore_fd,
int send_back_fd,
const libxl_domain_restore_params *params,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how *aop_console_how)
{
if (params->checkpointed_stream == LIBXL_CHECKPOINTED_STREAM_COLO) {
set_disk_colo_restore(d_config);
} else {
unset_disk_colo_restore(d_config);
}
/*
* When restoring (either from a save file or for a migration domain) set
* the MSR relaxed mode and HVM PIRQs for compatibility with older Xen
* versions if the options are not set as part of the original
* configuration.
*/
libxl_defbool_setdefault(&d_config->b_info.arch_x86.msr_relaxed, true);
libxl_defbool_setdefault(&d_config->b_info.u.hvm.pirq, true);
return do_domain_create(ctx, d_config, domid, restore_fd, send_back_fd,
params, ao_how, aop_console_how);
}
int libxl_domain_soft_reset(libxl_ctx *ctx,
libxl_domain_config *d_config,
uint32_t domid,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how
*aop_console_how)
{
libxl_domain_build_info *const info = &d_config->b_info;
if (info->type != LIBXL_DOMAIN_TYPE_HVM) return ERROR_INVAL;
return do_domain_soft_reset(ctx, d_config, domid, ao_how,
aop_console_how);
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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