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xen/tools/libxl/libxl_create.c
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Daniel De Graaf ecdb0c7aec libxl: correct xenstore permissions on console device 
When the console is connected to a domain other than dom0, the console
device's backend field should be set so the xenstore permissions for the
console device reflect the domain that will be accessing them.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
2013-01-17 16:48:21 +00:00

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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 <xc_dom.h>
#include <xenguest.h>
#include <xen/hvm/hvm_info_table.h>
int libxl__domain_create_info_setdefault(libxl__gc *gc,
libxl_domain_create_info *c_info)
{
if (!c_info->type)
return ERROR_INVAL;
if (c_info->type == LIBXL_DOMAIN_TYPE_HVM) {
libxl_defbool_setdefault(&c_info->hap, true);
libxl_defbool_setdefault(&c_info->oos, true);
}
libxl_defbool_setdefault(&c_info->run_hotplug_scripts, true);
return 0;
}
static int sched_params_valid(libxl__gc *gc,
uint32_t domid, libxl_domain_sched_params *scp)
{
int has_weight = scp->weight != LIBXL_DOMAIN_SCHED_PARAM_WEIGHT_DEFAULT;
int has_period = scp->period != LIBXL_DOMAIN_SCHED_PARAM_PERIOD_DEFAULT;
int has_slice = scp->slice != LIBXL_DOMAIN_SCHED_PARAM_SLICE_DEFAULT;
int has_extratime =
scp->extratime != LIBXL_DOMAIN_SCHED_PARAM_EXTRATIME_DEFAULT;
/* The sedf scheduler needs some more consistency checking */
if (libxl__domain_scheduler(gc, domid) == LIBXL_SCHEDULER_SEDF) {
if (has_weight && (has_period || has_slice))
return 0;
/* If you want a real-time domain, with its own period and
* slice, please, do provide both! */
if (has_period != has_slice)
return 0;
/*
* Idea is, if we specify a weight, then both period and
* slice has to be zero. OTOH, if we do specify a period and
* slice, it is weight that should be zeroed. See
* docs/misc/sedf_scheduler_mini-HOWTO.txt for more details
* on the meaningful combinations and their meanings.
*/
if (has_weight) {
scp->slice = 0;
scp->period = 0;
}
else if (!has_period) {
/* No weight nor slice/period means best effort. Parameters needs
* some mangling in order to properly ask for that, though. */
/*
* Providing no weight does not make any sense if we do not allow
* the domain to run in extra time. On the other hand, if we have
* extra time, weight will be ignored (and zeroed) by Xen, but it
* can't be zero here, or the call for setting the scheduling
* parameters will fail. So, avoid the latter by setting a random
* weight (namely, 1), as it will be ignored anyway.
*/
/* We can setup a proper best effort domain (extra time only)
* iff we either already have or are asking for some extra time. */
scp->weight = has_extratime ? scp->extratime : 1;
scp->period = 0;
} else {
/* Real-time domain: will get slice CPU time over every period */
scp->weight = 0;
}
}
return 1;
}
int libxl__domain_build_info_setdefault(libxl__gc *gc,
libxl_domain_build_info *b_info)
{
if (b_info->type != LIBXL_DOMAIN_TYPE_HVM &&
b_info->type != LIBXL_DOMAIN_TYPE_PV)
return ERROR_INVAL;
libxl_defbool_setdefault(&b_info->device_model_stubdomain, false);
if (!b_info->device_model_version) {
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM)
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
else {
const char *dm;
int rc;
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN;
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) {
LIBXL__LOG_ERRNO(CTX, XTL_VERBOSE, "qemu-xen is unavailable"
", use qemu-xen-traditional instead");
b_info->device_model_version =
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
} else {
LIBXL__LOG_ERRNO(CTX, XTL_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: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)
return ERROR_INVAL;
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
if (b_info->u.hvm.bios == LIBXL_BIOS_TYPE_ROMBIOS)
return ERROR_INVAL;
break;
default:abort();
}
}
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM &&
b_info->device_model_version !=
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL &&
libxl_defbool_val(b_info->device_model_stubdomain)) {
LIBXL__LOG(CTX, XTL_ERROR,
"device model stubdomains require \"qemu-xen-traditional\"");
return ERROR_INVAL;
}
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))
return ERROR_FAIL;
libxl_bitmap_set(&b_info->avail_vcpus, 0);
} else if (b_info->avail_vcpus.size > HVM_MAX_VCPUS)
return ERROR_FAIL;
if (!b_info->cpumap.size) {
if (libxl_cpu_bitmap_alloc(CTX, &b_info->cpumap, 0))
return ERROR_FAIL;
libxl_bitmap_set_any(&b_info->cpumap);
}
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;
libxl_defbool_setdefault(&b_info->localtime, false);
libxl_defbool_setdefault(&b_info->disable_migrate, false);
switch (b_info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
b_info->shadow_memkb = 0;
if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
b_info->video_memkb = 8 * 1024;
if (b_info->u.hvm.timer_mode == LIBXL_TIMER_MODE_DEFAULT)
b_info->u.hvm.timer_mode =
LIBXL_TIMER_MODE_NO_DELAY_FOR_MISSED_TICKS;
libxl_defbool_setdefault(&b_info->u.hvm.pae, true);
libxl_defbool_setdefault(&b_info->u.hvm.apic, 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.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.nested_hvm, false);
libxl_defbool_setdefault(&b_info->u.hvm.usb, false);
libxl_defbool_setdefault(&b_info->u.hvm.xen_platform_pci, true);
if (!b_info->u.hvm.boot) {
b_info->u.hvm.boot = strdup("cda");
if (!b_info->u.hvm.boot) return ERROR_NOMEM;
}
if (!b_info->u.hvm.vga.kind)
b_info->u.hvm.vga.kind = LIBXL_VGA_INTERFACE_TYPE_CIRRUS;
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 = strdup("127.0.0.1");
if (!b_info->u.hvm.vnc.listen) return ERROR_NOMEM;
}
}
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);
}
libxl_defbool_setdefault(&b_info->u.hvm.spice.enable, 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.nographic, false);
libxl_defbool_setdefault(&b_info->u.hvm.gfx_passthru, false);
break;
case LIBXL_DOMAIN_TYPE_PV:
libxl_defbool_setdefault(&b_info->u.pv.e820_host, false);
if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
b_info->shadow_memkb = 0;
if (b_info->u.pv.slack_memkb == LIBXL_MEMKB_DEFAULT)
b_info->u.pv.slack_memkb = 0;
break;
default:
LIBXL__LOG(CTX, LIBXL__LOG_ERROR,
"invalid domain type %s in create info",
libxl_domain_type_to_string(b_info->type));
return ERROR_INVAL;
}
return 0;
}
static int init_console_info(libxl__device_console *console, int dev_num)
{
memset(console, 0x00, sizeof(libxl__device_console));
console->devid = dev_num;
console->consback = LIBXL__CONSOLE_BACKEND_XENCONSOLED;
console->output = strdup("pty");
if (!console->output)
return ERROR_NOMEM;
return 0;
}
int libxl__domain_build(libxl__gc *gc,
libxl_domain_build_info *info,
uint32_t domid,
libxl__domain_build_state *state)
{
char **vments = NULL, **localents = NULL;
struct timeval start_time;
int i, ret;
ret = libxl__build_pre(gc, domid, info, state);
if (ret)
goto out;
gettimeofday(&start_time, NULL);
switch (info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
ret = libxl__build_hvm(gc, domid, info, 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] = libxl__sprintf(gc, "%lu.%02d", start_time.tv_sec,(int)start_time.tv_usec/10000);
localents = libxl__calloc(gc, 7, sizeof(char *));
localents[0] = "platform/acpi";
localents[1] = libxl_defbool_val(info->u.hvm.acpi) ? "1" : "0";
localents[2] = "platform/acpi_s3";
localents[3] = libxl_defbool_val(info->u.hvm.acpi_s3) ? "1" : "0";
localents[4] = "platform/acpi_s4";
localents[5] = libxl_defbool_val(info->u.hvm.acpi_s4) ? "1" : "0";
break;
case LIBXL_DOMAIN_TYPE_PV:
ret = libxl__build_pv(gc, domid, info, 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++] = libxl__sprintf(gc, "%lu.%02d", 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;
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_create_info *info,
uint32_t *domid)
{
libxl_ctx *ctx = libxl__gc_owner(gc);
int flags, ret, rc, nb_vm;
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;
xen_domain_handle_t handle;
libxl_vminfo *vm_list;
assert(!libxl_domid_valid_guest(*domid));
uuid_string = libxl__uuid2string(gc, info->uuid);
if (!uuid_string) {
rc = ERROR_NOMEM;
goto out;
}
flags = 0;
if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
flags |= XEN_DOMCTL_CDF_hvm_guest;
flags |= libxl_defbool_val(info->hap) ? XEN_DOMCTL_CDF_hap : 0;
flags |= libxl_defbool_val(info->oos) ? 0 : XEN_DOMCTL_CDF_oos_off;
}
*domid = -1;
/* Ultimately, handle is an array of 16 uint8_t, same as uuid */
libxl_uuid_copy((libxl_uuid *)handle, &info->uuid);
ret = xc_domain_create(ctx->xch, info->ssidref, handle, flags, domid);
if (ret < 0) {
LIBXL__LOG_ERRNOVAL(ctx, LIBXL__LOG_ERROR, ret, "domain creation fail");
rc = ERROR_FAIL;
goto out;
}
ret = xc_cpupool_movedomain(ctx->xch, info->poolid, *domid);
if (ret < 0) {
LIBXL__LOG_ERRNOVAL(ctx, LIBXL__LOG_ERROR, ret, "domain move fail");
rc = ERROR_FAIL;
goto out;
}
dom_path = libxl__xs_get_dompath(gc, *domid);
if (!dom_path) {
rc = ERROR_FAIL;
goto out;
}
vm_path = libxl__sprintf(gc, "/vm/%s", uuid_string);
if (!vm_path) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "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_mkdir(gc, t, dom_path, roperm, ARRAY_SIZE(roperm));
xs_rm(ctx->xsh, t, vm_path);
libxl__xs_mkdir(gc, t, vm_path, roperm, ARRAY_SIZE(roperm));
xs_rm(ctx->xsh, t, libxl_path);
libxl__xs_mkdir(gc, t, libxl_path, noperm, ARRAY_SIZE(noperm));
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%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_mkdir(gc, t,
libxl__sprintf(gc, "%s/cpu", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/memory", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/device", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/control", dom_path),
roperm, ARRAY_SIZE(roperm));
if (info->type == LIBXL_DOMAIN_TYPE_HVM)
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/hvmloader", dom_path),
roperm, ARRAY_SIZE(roperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/control/shutdown", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/device/suspend/event-channel", dom_path),
rwperm, ARRAY_SIZE(rwperm));
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/data", dom_path),
rwperm, ARRAY_SIZE(rwperm));
if (info->type == LIBXL_DOMAIN_TYPE_HVM)
libxl__xs_mkdir(gc, t,
libxl__sprintf(gc, "%s/hvmloader/generation-id-address", dom_path),
rwperm, ARRAY_SIZE(rwperm));
vm_list = libxl_list_vm(ctx, &nb_vm);
if (!vm_list) {
LOG(ERROR, "cannot get number of running guests");
rc = ERROR_FAIL;
goto out;
}
libxl_vminfo_list_free(vm_list, nb_vm);
int hotplug_setting = libxl__hotplug_settings(gc, t);
if (hotplug_setting < 0) {
LOG(ERROR, "unable to get current hotplug scripts execution setting");
rc = ERROR_FAIL;
goto out;
}
if (libxl_defbool_val(info->run_hotplug_scripts) != hotplug_setting &&
(nb_vm - 1)) {
LOG(ERROR, "cannot change hotplug execution option once set, "
"please shutdown all guests before changing it");
rc = ERROR_FAIL;
goto out;
}
if (libxl_defbool_val(info->run_hotplug_scripts)) {
rc = libxl__xs_write_checked(gc, t, DISABLE_UDEV_PATH, "1");
if (rc) {
LOGE(ERROR, "unable to write %s = 1", DISABLE_UDEV_PATH);
goto out;
}
} else {
rc = libxl__xs_rm_checked(gc, t, DISABLE_UDEV_PATH);
if (rc) {
LOGE(ERROR, "unable to delete %s", DISABLE_UDEV_PATH);
goto out;
}
}
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/uuid", vm_path), uuid_string, strlen(uuid_string));
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/name", vm_path), info->name, strlen(info->name));
libxl__xs_writev(gc, t, dom_path, info->xsdata);
libxl__xs_writev(gc, t, libxl__sprintf(gc, "%s/platform", dom_path), info->platformdata);
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/control/platform-feature-multiprocessor-suspend", dom_path), "1", 1);
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/control/platform-feature-xs_reset_watches", dom_path), "1", 1);
if (!xs_transaction_end(ctx->xsh, t, 0)) {
if (errno == EAGAIN) {
t = 0;
goto retry_transaction;
}
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "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 = libxl__sprintf(gc, "%s/dm-version", path);
return libxl__xs_write(gc, XBT_NULL, path, "%s",
libxl_device_model_version_to_string(b_info->device_model_version));
}
/*----- 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_devmodel_started(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int rc);
static void domcreate_bootloader_console_available(libxl__egc *egc,
libxl__bootloader_state *bl);
static void domcreate_bootloader_done(libxl__egc *egc,
libxl__bootloader_state *bl,
int rc);
static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *aodevs,
int ret);
static void domcreate_attach_vtpms(libxl__egc *egc, libxl__multidev *multidev,
int ret);
static void domcreate_attach_pci(libxl__egc *egc, libxl__multidev *aodevs,
int ret);
static void domcreate_console_available(libxl__egc *egc,
libxl__domain_create_state *dcs);
static void domcreate_rebuild_done(libxl__egc *egc,
libxl__domain_create_state *dcs,
int ret);
/* 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 void initiate_domain_create(libxl__egc *egc,
libxl__domain_create_state *dcs)
{
STATE_AO_GC(dcs->ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
uint32_t domid;
int i, ret;
/* convenience aliases */
libxl_domain_config *const d_config = dcs->guest_config;
const int restore_fd = dcs->restore_fd;
memset(&dcs->build_state, 0, sizeof(dcs->build_state));
domid = 0;
ret = libxl__domain_create_info_setdefault(gc, &d_config->c_info);
if (ret) goto error_out;
ret = libxl__domain_make(gc, &d_config->c_info, &domid);
if (ret) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "cannot make domain: %d", ret);
dcs->guest_domid = domid;
ret = ERROR_FAIL;
goto error_out;
}
dcs->guest_domid = domid;
dcs->dmss.dm.guest_domid = 0; /* means we haven't spawned */
ret = libxl__domain_build_info_setdefault(gc, &d_config->b_info);
if (ret) goto error_out;
if (!sched_params_valid(gc, domid, &d_config->b_info.sched_params)) {
LOG(ERROR, "Invalid scheduling parameters\n");
ret = ERROR_INVAL;
goto error_out;
}
for (i = 0; i < d_config->num_disks; i++) {
ret = libxl__device_disk_setdefault(gc, &d_config->disks[i]);
if (ret) goto error_out;
}
dcs->bl.ao = ao;
libxl_device_disk *bootdisk =
d_config->num_disks > 0 ? &d_config->disks[0] : NULL;
if (restore_fd >= 0) {
LOG(DEBUG, "restoring, not running bootloader\n");
domcreate_bootloader_done(egc, &dcs->bl, 0);
} else {
LOG(DEBUG, "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 = &dcs->build_state.pv_kernel;
dcs->bl.ramdisk = &dcs->build_state.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;
libxl_domain_build_info *const info = &d_config->b_info;
const int restore_fd = dcs->restore_fd;
libxl__domain_build_state *const state = &dcs->build_state;
libxl__srm_restore_autogen_callbacks *const callbacks =
&dcs->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->dmss.dm.spawn.ao = ao;
dcs->dmss.dm.guest_config = dcs->guest_config;
dcs->dmss.dm.build_state = &dcs->build_state;
dcs->dmss.dm.callback = domcreate_devmodel_started;
dcs->dmss.callback = domcreate_devmodel_started;
if ( restore_fd < 0 ) {
rc = libxl__domain_build(gc, &d_config->b_info, domid, state);
domcreate_rebuild_done(egc, dcs, rc);
return;
}
/* Restore */
rc = libxl__build_pre(gc, domid, info, state);
if (rc)
goto out;
/* read signature */
int hvm, pae, superpages;
switch (info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
hvm = 1;
superpages = 1;
pae = libxl_defbool_val(info->u.hvm.pae);
callbacks->toolstack_restore = libxl__toolstack_restore;
break;
case LIBXL_DOMAIN_TYPE_PV:
hvm = 0;
superpages = 0;
pae = 1;
break;
default:
rc = ERROR_INVAL;
goto out;
}
libxl__xc_domain_restore(egc, dcs,
hvm, pae, superpages, 1);
return;
out:
libxl__xc_domain_restore_done(egc, dcs, rc, 0, 0);
}
void libxl__srm_callout_callback_restore_results(unsigned long store_mfn,
unsigned long console_mfn, unsigned long genidad, void *user)
{
libxl__save_helper_state *shs = user;
libxl__domain_create_state *dcs = CONTAINER_OF(shs, *dcs, shs);
STATE_AO_GC(dcs->ao);
libxl__domain_build_state *const state = &dcs->build_state;
state->store_mfn = store_mfn;
state->console_mfn = console_mfn;
state->vm_generationid_addr = genidad;
shs->need_results = 0;
}
void libxl__xc_domain_restore_done(libxl__egc *egc, void *dcs_void,
int ret, int retval, int errnoval)
{
libxl__domain_create_state *dcs = dcs_void;
STATE_AO_GC(dcs->ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
char **vments = NULL, **localents = NULL;
struct timeval start_time;
int i, esave, flags;
/* 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;
if (retval) {
LOGEV(ERROR, errnoval, "restoring domain");
ret = ERROR_FAIL;
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] = libxl__sprintf(gc, "%lu.%02d", 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++] = libxl__sprintf(gc, "%lu.%02d", 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;
default:
ret = ERROR_INVAL;
goto out;
}
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(
XC_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);
}
esave = errno;
flags = fcntl(fd, F_GETFL);
if (flags == -1) {
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "unable to get flags on restore fd");
} else {
flags &= ~O_NONBLOCK;
if (fcntl(fd, F_SETFL, flags) == -1)
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "unable to put restore fd"
" back to blocking mode");
}
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;
libxl_ctx *const ctx = CTX;
if (ret) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "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) {
LOG(ERROR, "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];
LOG(DEBUG, "dom%d ioports %"PRIx32"-%"PRIx32,
domid, io->first, io->first + io->number - 1);
ret = xc_domain_ioport_permission(CTX->xch, domid,
io->first, io->number, 1);
if (ret < 0) {
LOGE(ERROR,
"failed give dom%d access to ioports %"PRIx32"-%"PRIx32,
domid, io->first, io->first + io->number - 1);
ret = ERROR_FAIL;
}
}
for (i = 0; i < d_config->b_info.num_irqs; i++) {
uint32_t irq = d_config->b_info.irqs[i];
LOG(DEBUG, "dom%d irq %"PRIx32, domid, irq);
ret = xc_domain_irq_permission(CTX->xch, domid, irq, 1);
if (ret < 0) {
LOGE(ERROR,
"failed give dom%d access to irq %"PRId32, domid, irq);
ret = ERROR_FAIL;
}
}
for (i = 0; i < d_config->b_info.num_iomem; i++) {
libxl_iomem_range *io = &d_config->b_info.iomem[i];
LOG(DEBUG, "dom%d iomem %"PRIx64"-%"PRIx64,
domid, io->start, io->start + io->number - 1);
ret = xc_domain_iomem_permission(CTX->xch, domid,
io->start, io->number, 1);
if (ret < 0) {
LOGE(ERROR,
"failed give dom%d access to iomem range %"PRIx64"-%"PRIx64,
domid, io->start, io->start + io->number - 1);
ret = ERROR_FAIL;
}
}
for (i = 0; i < d_config->num_nics; i++) {
/* We have to init the nic here, because we still haven't
* called libxl_device_nic_add at this point, but qemu needs
* the nic information to be complete.
*/
ret = libxl__device_nic_setdefault(gc, &d_config->nics[i], domid);
if (ret)
goto error_out;
}
switch (d_config->c_info.type) {
case LIBXL_DOMAIN_TYPE_HVM:
{
libxl__device_console console;
libxl_device_vkb vkb;
ret = init_console_info(&console, 0);
if ( ret )
goto error_out;
console.backend_domid = state->console_domid;
libxl__device_console_add(gc, domid, &console, state);
libxl__device_console_dispose(&console);
libxl_device_vkb_init(&vkb);
libxl__device_vkb_add(gc, domid, &vkb);
libxl_device_vkb_dispose(&vkb);
dcs->dmss.dm.guest_domid = domid;
if (libxl_defbool_val(d_config->b_info.device_model_stubdomain))
libxl__spawn_stub_dm(egc, &dcs->dmss);
else
libxl__spawn_local_dm(egc, &dcs->dmss.dm);
return;
}
case LIBXL_DOMAIN_TYPE_PV:
{
int need_qemu = 0;
libxl__device_console console;
for (i = 0; i < d_config->num_vfbs; i++) {
libxl__device_vfb_add(gc, domid, &d_config->vfbs[i]);
libxl__device_vkb_add(gc, domid, &d_config->vkbs[i]);
}
ret = init_console_info(&console, 0);
if ( ret )
goto error_out;
need_qemu = libxl__need_xenpv_qemu(gc, 1, &console,
d_config->num_vfbs, d_config->vfbs,
d_config->num_disks, &d_config->disks[0]);
console.backend_domid = state->console_domid;
libxl__device_console_add(gc, domid, &console, state);
libxl__device_console_dispose(&console);
if (need_qemu) {
dcs->dmss.dm.guest_domid = domid;
libxl__spawn_local_dm(egc, &dcs->dmss.dm);
return;
} else {
assert(!dcs->dmss.dm.guest_domid);
domcreate_devmodel_started(egc, &dcs->dmss.dm, 0);
return;
}
}
default:
ret = ERROR_INVAL;
goto error_out;
}
abort(); /* not reached */
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_devmodel_started(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int ret)
{
libxl__domain_create_state *dcs = CONTAINER_OF(dmss, *dcs, dmss.dm);
STATE_AO_GC(dmss->spawn.ao);
libxl_ctx *ctx = CTX;
int domid = dcs->guest_domid;
/* convenience aliases */
libxl_domain_config *const d_config = dcs->guest_config;
if (ret) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
"device model did not start: %d", ret);
goto error_out;
}
if (dcs->dmss.dm.guest_domid) {
if (d_config->b_info.device_model_version
== LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN) {
libxl__qmp_initializations(gc, domid, d_config);
}
}
/* Plug nic interfaces */
if (d_config->num_nics > 0) {
/* Attach nics */
libxl__multidev_begin(ao, &dcs->multidev);
dcs->multidev.callback = domcreate_attach_vtpms;
libxl__add_nics(egc, ao, domid, d_config, &dcs->multidev);
libxl__multidev_prepared(egc, &dcs->multidev, 0);
return;
}
domcreate_attach_vtpms(egc, &dcs->multidev, 0);
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_attach_vtpms(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;
if(ret) {
LOG(ERROR, "unable to add nic devices");
goto error_out;
}
/* Plug vtpm devices */
if (d_config->num_vtpms > 0) {
/* Attach vtpms */
libxl__multidev_begin(ao, &dcs->multidev);
dcs->multidev.callback = domcreate_attach_pci;
libxl__add_vtpms(egc, ao, domid, d_config, &dcs->multidev);
libxl__multidev_prepared(egc, &dcs->multidev, 0);
return;
}
domcreate_attach_pci(egc, multidev, 0);
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
static void domcreate_attach_pci(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;
libxl_ctx *ctx = CTX;
int domid = dcs->guest_domid;
/* convenience aliases */
libxl_domain_config *const d_config = dcs->guest_config;
if (ret) {
LOG(ERROR, "unable to add vtpm devices");
goto error_out;
}
for (i = 0; i < d_config->num_pcidevs; i++)
libxl__device_pci_add(gc, domid, &d_config->pcidevs[i], 1);
if (d_config->num_pcidevs > 0) {
ret = libxl__create_pci_backend(gc, domid, d_config->pcidevs,
d_config->num_pcidevs);
if (ret < 0) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
"libxl_create_pci_backend failed: %d", ret);
goto error_out;
}
}
libxl__arch_domain_create(gc, d_config, domid);
domcreate_console_available(egc, dcs);
domcreate_complete(egc, dcs, 0);
return;
error_out:
assert(ret);
domcreate_complete(egc, dcs, ret);
}
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;
if (!rc && d_config->b_info.exec_ssidref)
rc = xc_flask_relabel_domain(CTX->xch, dcs->guest_domid, d_config->b_info.exec_ssidref);
if (rc) {
if (dcs->guest_domid) {
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 = -1;
}
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)
LOG(ERROR, "unable to destroy domain %u following failed creation",
dds->domid);
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;
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, 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;
GCNEW(cdcs);
cdcs->dcs.ao = ao;
cdcs->dcs.guest_config = d_config;
cdcs->dcs.restore_fd = restore_fd;
cdcs->dcs.callback = domain_create_cb;
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;
}
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);
STATE_AO_GC(cdcs->dcs.ao);
if (!rc)
*cdcs->domid_out = domid;
libxl__ao_complete(egc, ao, rc);
}
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)
{
return do_domain_create(ctx, d_config, domid, -1,
ao_how, aop_console_how);
}
int libxl_domain_create_restore(libxl_ctx *ctx, libxl_domain_config *d_config,
uint32_t *domid, int restore_fd,
const libxl_asyncop_how *ao_how,
const libxl_asyncprogress_how *aop_console_how)
{
return do_domain_create(ctx, d_config, domid, restore_fd,
ao_how, aop_console_how);
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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