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7df31694deac6611aa1bc47ff1936ea4d9898dbf
xen/tools/libxl/libxl_dm.c
T
Roger Pau Monne 5ca88cb758 libxl: allow the creation of HVM domains without a device model. 
Replace the firmware loaded into HVM guests with an OS kernel. Since the HVM
builder now uses the PV xc_dom_* set of functions this kernel will be parsed
and loaded inside the guest like on PV, but the container is a pure HVM
guest.

Also, if device_model_version is set to none or a device model for the
specified domain is not present unconditinally set the nic type to
LIBXL_NIC_TYPE_VIF.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
2015-12-15 13:25:44 +00:00

2179 lines
76 KiB
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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 <xc_dom.h>
#include <xen/hvm/e820.h>
#include <sys/types.h>
#include <pwd.h>
static const char *libxl_tapif_script(libxl__gc *gc)
{
#if defined(__linux__) || defined(__FreeBSD__)
return libxl__strdup(gc, "no");
#else
return GCSPRINTF("%s/qemu-ifup", libxl__xen_script_dir_path());
#endif
}
const char *libxl__device_model_savefile(libxl__gc *gc, uint32_t domid)
{
return GCSPRINTF(LIBXL_DEVICE_MODEL_SAVE_FILE".%d", domid);
}
static const char *qemu_xen_path(libxl__gc *gc)
{
return QEMU_XEN_PATH;
}
static int libxl__create_qemu_logfile(libxl__gc *gc, char *name)
{
char *logfile;
int rc, logfile_w;
rc = libxl_create_logfile(CTX, name, &logfile);
if (rc) return rc;
logfile_w = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0644);
free(logfile);
if (logfile_w < 0) {
LOGE(ERROR, "unable to open Qemu logfile");
return ERROR_FAIL;
}
return logfile_w;
}
const char *libxl__domain_device_model(libxl__gc *gc,
const libxl_domain_build_info *info)
{
const char *dm;
if (libxl_defbool_val(info->device_model_stubdomain))
return NULL;
if (info->device_model) {
dm = libxl__strdup(gc, info->device_model);
} else {
switch (info->device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
dm = libxl__abs_path(gc, "qemu-dm", libxl__private_bindir_path());
break;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
dm = qemu_xen_path(gc);
break;
default:
LOG(ERROR, "invalid device model version %d",
info->device_model_version);
dm = NULL;
break;
}
}
return dm;
}
static int
libxl__xc_device_get_rdm(libxl__gc *gc,
uint32_t flags,
uint16_t seg,
uint8_t bus,
uint8_t devfn,
unsigned int *nr_entries,
struct xen_reserved_device_memory **xrdm)
{
int rc = 0, r;
/*
* We really can't presume how many entries we can get in advance.
*/
*nr_entries = 0;
r = xc_reserved_device_memory_map(CTX->xch, flags, seg, bus, devfn,
NULL, nr_entries);
assert(r <= 0);
/* "0" means we have no any rdm entry. */
if (!r) goto out;
if (errno != ENOBUFS) {
rc = ERROR_FAIL;
goto out;
}
GCNEW_ARRAY(*xrdm, *nr_entries);
r = xc_reserved_device_memory_map(CTX->xch, flags, seg, bus, devfn,
*xrdm, nr_entries);
if (r)
rc = ERROR_FAIL;
out:
if (rc) {
*nr_entries = 0;
*xrdm = NULL;
LOG(ERROR, "Could not get reserved device memory maps.");
}
return rc;
}
/*
* Check whether there exists rdm hole in the specified memory range.
* Returns true if exists, else returns false.
*/
static bool overlaps_rdm(uint64_t start, uint64_t memsize,
uint64_t rdm_start, uint64_t rdm_size)
{
return (start + memsize > rdm_start) && (start < rdm_start + rdm_size);
}
static void
add_rdm_entry(libxl__gc *gc, libxl_domain_config *d_config,
uint64_t rdm_start, uint64_t rdm_size, int rdm_policy)
{
d_config->rdms = libxl__realloc(NOGC, d_config->rdms,
(d_config->num_rdms+1) * sizeof(libxl_device_rdm));
d_config->rdms[d_config->num_rdms].start = rdm_start;
d_config->rdms[d_config->num_rdms].size = rdm_size;
d_config->rdms[d_config->num_rdms].policy = rdm_policy;
d_config->num_rdms++;
}
/*
* Check reported RDM regions and handle potential gfn conflicts according
* to user preferred policy.
*
* RDM can reside in address space beyond 4G theoretically, but we never
* see this in real world. So in order to avoid breaking highmem layout
* we don't solve highmem conflict. Note this means highmem rmrr could
* still be supported if no conflict.
*
* But in the case of lowmem, RDM probably scatter the whole RAM space.
* Especially multiple RDM entries would worsen this to lead a complicated
* memory layout. And then its hard to extend hvm_info_table{} to work
* hvmloader out. So here we're trying to figure out a simple solution to
* avoid breaking existing layout. So when a conflict occurs,
*
* #1. Above a predefined boundary (default 2G)
* - Move lowmem_end below reserved region to solve conflict;
*
* #2. Below a predefined boundary (default 2G)
* - Check strict/relaxed policy.
* "strict" policy leads to fail libxl.
* "relaxed" policy issue a warning message and also mask this entry
* INVALID to indicate we shouldn't expose this entry to hvmloader.
* Note when both policies are specified on a given region, the per-device
* policy should override the global policy.
*/
int libxl__domain_device_construct_rdm(libxl__gc *gc,
libxl_domain_config *d_config,
uint64_t rdm_mem_boundary,
struct xc_dom_image *dom)
{
int i, j, conflict, rc;
struct xen_reserved_device_memory *xrdm = NULL;
uint32_t strategy = d_config->b_info.u.hvm.rdm.strategy;
uint16_t seg;
uint8_t bus, devfn;
uint64_t rdm_start, rdm_size;
uint64_t highmem_end = dom->highmem_end ? dom->highmem_end : (1ull<<32);
/*
* We just want to construct RDM once since RDM is specific to the
* given platform, so this shouldn't change again.
*/
if (d_config->num_rdms)
return 0;
/* Might not expose rdm. */
if (strategy == LIBXL_RDM_RESERVE_STRATEGY_IGNORE &&
!d_config->num_pcidevs)
return 0;
/* Query all RDM entries in this platform */
if (strategy == LIBXL_RDM_RESERVE_STRATEGY_HOST) {
unsigned int nr_entries;
/* Collect all rdm info if exist. */
rc = libxl__xc_device_get_rdm(gc, XENMEM_RDM_ALL,
0, 0, 0, &nr_entries, &xrdm);
if (rc)
goto out;
if (!nr_entries)
return 0;
assert(xrdm);
for (i = 0; i < nr_entries; i++)
{
add_rdm_entry(gc, d_config,
pfn_to_paddr(xrdm[i].start_pfn),
pfn_to_paddr(xrdm[i].nr_pages),
d_config->b_info.u.hvm.rdm.policy);
}
}
/* Query RDM entries per-device */
for (i = 0; i < d_config->num_pcidevs; i++) {
unsigned int nr_entries;
bool new = true;
seg = d_config->pcidevs[i].domain;
bus = d_config->pcidevs[i].bus;
devfn = PCI_DEVFN(d_config->pcidevs[i].dev,
d_config->pcidevs[i].func);
nr_entries = 0;
rc = libxl__xc_device_get_rdm(gc, 0,
seg, bus, devfn, &nr_entries, &xrdm);
if (rc)
goto out;
/* No RDM to associated with this device. */
if (!nr_entries)
continue;
assert(xrdm);
/*
* Need to check whether this entry is already saved in the array.
* This could come from two cases:
*
* - user may configure to get all RDMs in this platform, which
* is already queried before this point
* - or two assigned devices may share one RDM entry
*
* Different policies may be configured on the same RDM due to
* above two cases. But we don't allow to assign such a group
* devies right now so it doesn't come true in our case.
*/
for (j = 0; j < d_config->num_rdms; j++) {
if (d_config->rdms[j].start == pfn_to_paddr(xrdm[0].start_pfn))
{
/*
* So the per-device policy always override the global
* policy in this case.
*/
d_config->rdms[j].policy = d_config->pcidevs[i].rdm_policy;
new = false;
break;
}
}
if (new) {
add_rdm_entry(gc, d_config,
pfn_to_paddr(xrdm[0].start_pfn),
pfn_to_paddr(xrdm[0].nr_pages),
d_config->pcidevs[i].rdm_policy);
}
}
/*
* Next step is to check and avoid potential conflict between RDM
* entries and guest RAM. To avoid intrusive impact to existing
* memory layout {lowmem, mmio, highmem} which is passed around
* various function blocks, below conflicts are not handled which
* are rare and handling them would lead to a more scattered
* layout:
* - RDM in highmem area (>4G)
* - RDM lower than a defined memory boundary (e.g. 2G)
* Otherwise for conflicts between boundary and 4G, we'll simply
* move lowmem end below reserved region to solve conflict.
*
* If a conflict is detected on a given RDM entry, an error will
* be returned if 'strict' policy is specified. Instead, if
* 'relaxed' policy specified, this conflict is treated just as a
* warning, but we mark this RDM entry as INVALID to indicate that
* this entry shouldn't be exposed to hvmloader.
*
* Firstly we should check the case of rdm < 4G because we may
* need to expand highmem_end.
*/
for (i = 0; i < d_config->num_rdms; i++) {
rdm_start = d_config->rdms[i].start;
rdm_size = d_config->rdms[i].size;
conflict = overlaps_rdm(0, dom->lowmem_end, rdm_start, rdm_size);
if (!conflict)
continue;
/* Just check if RDM > our memory boundary. */
if (rdm_start > rdm_mem_boundary) {
/*
* We will move downwards lowmem_end so we have to expand
* highmem_end.
*/
highmem_end += (dom->lowmem_end - rdm_start);
/* Now move downwards lowmem_end. */
dom->lowmem_end = rdm_start;
}
}
/* Sync highmem_end. */
dom->highmem_end = highmem_end;
/*
* Finally we can take same policy to check lowmem(< 2G) and
* highmem adjusted above.
*/
for (i = 0; i < d_config->num_rdms; i++) {
rdm_start = d_config->rdms[i].start;
rdm_size = d_config->rdms[i].size;
/* Does this entry conflict with lowmem? */
conflict = overlaps_rdm(0, dom->lowmem_end,
rdm_start, rdm_size);
/* Does this entry conflict with highmem? */
conflict |= overlaps_rdm((1ULL<<32),
dom->highmem_end - (1ULL<<32),
rdm_start, rdm_size);
if (!conflict)
continue;
if (d_config->rdms[i].policy == LIBXL_RDM_RESERVE_POLICY_STRICT) {
LOG(ERROR, "RDM conflict at 0x%"PRIx64".\n",
d_config->rdms[i].start);
goto out;
} else {
LOG(WARN, "Ignoring RDM conflict at 0x%"PRIx64".\n",
d_config->rdms[i].start);
/*
* Then mask this INVALID to indicate we shouldn't expose this
* to hvmloader.
*/
d_config->rdms[i].policy = LIBXL_RDM_RESERVE_POLICY_INVALID;
}
}
return 0;
out:
return ERROR_FAIL;
}
const libxl_vnc_info *libxl__dm_vnc(const libxl_domain_config *guest_config)
{
const libxl_vnc_info *vnc = NULL;
if (guest_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM) {
vnc = &guest_config->b_info.u.hvm.vnc;
} else if (guest_config->num_vfbs > 0) {
vnc = &guest_config->vfbs[0].vnc;
}
return vnc && libxl_defbool_val(vnc->enable) ? vnc : NULL;
}
static const libxl_sdl_info *dm_sdl(const libxl_domain_config *guest_config)
{
const libxl_sdl_info *sdl = NULL;
if (guest_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM) {
sdl = &guest_config->b_info.u.hvm.sdl;
} else if (guest_config->num_vfbs > 0) {
sdl = &guest_config->vfbs[0].sdl;
}
return sdl && libxl_defbool_val(sdl->enable) ? sdl : NULL;
}
static const char *dm_keymap(const libxl_domain_config *guest_config)
{
if (guest_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM) {
return guest_config->b_info.u.hvm.keymap;
} else if (guest_config->num_vfbs > 0) {
return guest_config->vfbs[0].keymap;
} else
return NULL;
}
static int libxl__build_device_model_args_old(libxl__gc *gc,
const char *dm, int domid,
const libxl_domain_config *guest_config,
char ***args, char ***envs,
const libxl__domain_build_state *state)
{
const libxl_domain_create_info *c_info = &guest_config->c_info;
const libxl_domain_build_info *b_info = &guest_config->b_info;
const libxl_device_nic *nics = guest_config->nics;
const libxl_vnc_info *vnc = libxl__dm_vnc(guest_config);
const libxl_sdl_info *sdl = dm_sdl(guest_config);
const int num_nics = guest_config->num_nics;
const char *keymap = dm_keymap(guest_config);
int i;
flexarray_t *dm_args, *dm_envs;
dm_args = flexarray_make(gc, 16, 1);
dm_envs = flexarray_make(gc, 16, 1);
flexarray_vappend(dm_args, dm,
"-d", GCSPRINTF("%d", domid), NULL);
if (c_info->name)
flexarray_vappend(dm_args, "-domain-name", c_info->name, NULL);
if (vnc) {
char *vncarg = NULL;
flexarray_append(dm_args, "-vnc");
/*
* If vnc->listen is present and contains a :, and
* - vnc->display is 0, use vnc->listen
* - vnc->display is non-zero, be confused
* If vnc->listen is present but doesn't, use vnc->listen:vnc->display.
* If vnc->listen is not present, use 127.0.0.1:vnc->display
* (Remembering that vnc->display already defaults to 0.)
*/
if (vnc->listen) {
if (strchr(vnc->listen, ':') != NULL) {
if (vnc->display) {
LOG(ERROR, "vncdisplay set, vnclisten contains display");
return ERROR_INVAL;
}
vncarg = vnc->listen;
} else {
vncarg = GCSPRINTF("%s:%d", vnc->listen, vnc->display);
}
} else
vncarg = GCSPRINTF("127.0.0.1:%d", vnc->display);
if (vnc->passwd && vnc->passwd[0]) {
vncarg = GCSPRINTF("%s,password", vncarg);
}
flexarray_append(dm_args, vncarg);
if (libxl_defbool_val(vnc->findunused)) {
flexarray_append(dm_args, "-vncunused");
}
} else
/*
* VNC is not enabled by default by qemu-xen-traditional,
* however passing -vnc none causes SDL to not be
* (unexpectedly) enabled by default. This is overridden by
* explicitly passing -sdl below as required.
*/
flexarray_append_pair(dm_args, "-vnc", "none");
if (sdl) {
flexarray_append(dm_args, "-sdl");
if (!libxl_defbool_val(sdl->opengl)) {
flexarray_append(dm_args, "-disable-opengl");
}
if (sdl->display)
flexarray_append_pair(dm_envs, "DISPLAY", sdl->display);
if (sdl->xauthority)
flexarray_append_pair(dm_envs, "XAUTHORITY", sdl->xauthority);
}
if (keymap) {
flexarray_vappend(dm_args, "-k", keymap, NULL);
}
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
int ioemu_nics = 0;
int nr_set_cpus = 0;
char *s;
if (b_info->kernel) {
LOG(ERROR, "HVM direct kernel boot is not supported by "
"qemu-xen-traditional");
return ERROR_INVAL;
}
if (b_info->u.hvm.serial || b_info->u.hvm.serial_list) {
if ( b_info->u.hvm.serial && b_info->u.hvm.serial_list )
{
LOG(ERROR, "Both serial and serial_list set");
return ERROR_INVAL;
}
if (b_info->u.hvm.serial) {
flexarray_vappend(dm_args,
"-serial", b_info->u.hvm.serial, NULL);
} else if (b_info->u.hvm.serial_list) {
char **p;
for (p = b_info->u.hvm.serial_list;
*p;
p++) {
flexarray_vappend(dm_args,
"-serial",
*p, NULL);
}
}
}
if (libxl_defbool_val(b_info->u.hvm.nographic) && (!sdl && !vnc)) {
flexarray_append(dm_args, "-nographic");
}
if (b_info->video_memkb) {
flexarray_vappend(dm_args, "-videoram",
GCSPRINTF("%d", libxl__sizekb_to_mb(b_info->video_memkb)),
NULL);
}
switch (b_info->u.hvm.vga.kind) {
case LIBXL_VGA_INTERFACE_TYPE_STD:
flexarray_append(dm_args, "-std-vga");
break;
case LIBXL_VGA_INTERFACE_TYPE_CIRRUS:
break;
case LIBXL_VGA_INTERFACE_TYPE_NONE:
flexarray_append_pair(dm_args, "-vga", "none");
break;
case LIBXL_VGA_INTERFACE_TYPE_QXL:
break;
}
if (b_info->u.hvm.boot) {
flexarray_vappend(dm_args, "-boot", b_info->u.hvm.boot, NULL);
}
if (libxl_defbool_val(b_info->u.hvm.usb)
|| b_info->u.hvm.usbdevice
|| b_info->u.hvm.usbdevice_list) {
if ( b_info->u.hvm.usbdevice && b_info->u.hvm.usbdevice_list )
{
LOG(ERROR, "Both usbdevice and usbdevice_list set");
return ERROR_INVAL;
}
flexarray_append(dm_args, "-usb");
if (b_info->u.hvm.usbdevice) {
flexarray_vappend(dm_args,
"-usbdevice", b_info->u.hvm.usbdevice, NULL);
} else if (b_info->u.hvm.usbdevice_list) {
char **p;
for (p = b_info->u.hvm.usbdevice_list;
*p;
p++) {
flexarray_vappend(dm_args,
"-usbdevice",
*p, NULL);
}
}
}
if (b_info->u.hvm.soundhw) {
flexarray_vappend(dm_args, "-soundhw", b_info->u.hvm.soundhw, NULL);
}
if (libxl_defbool_val(b_info->u.hvm.acpi)) {
flexarray_append(dm_args, "-acpi");
}
if (b_info->max_vcpus > 1) {
flexarray_vappend(dm_args, "-vcpus",
GCSPRINTF("%d", b_info->max_vcpus),
NULL);
}
nr_set_cpus = libxl_bitmap_count_set(&b_info->avail_vcpus);
s = libxl_bitmap_to_hex_string(CTX, &b_info->avail_vcpus);
flexarray_vappend(dm_args, "-vcpu_avail",
GCSPRINTF("%s", s), NULL);
free(s);
for (i = 0; i < num_nics; i++) {
if (nics[i].nictype == LIBXL_NIC_TYPE_VIF_IOEMU) {
char *smac = GCSPRINTF(
LIBXL_MAC_FMT, LIBXL_MAC_BYTES(nics[i].mac));
const char *ifname = libxl__device_nic_devname(gc,
domid, nics[i].devid,
LIBXL_NIC_TYPE_VIF_IOEMU);
flexarray_vappend(dm_args,
"-net",
GCSPRINTF(
"nic,vlan=%d,macaddr=%s,model=%s",
nics[i].devid, smac, nics[i].model),
"-net",
GCSPRINTF(
"tap,vlan=%d,ifname=%s,bridge=%s,"
"script=%s,downscript=%s",
nics[i].devid, ifname, nics[i].bridge,
libxl_tapif_script(gc),
libxl_tapif_script(gc)),
NULL);
ioemu_nics++;
}
}
/* If we have no emulated nics, tell qemu not to create any */
if ( ioemu_nics == 0 ) {
flexarray_vappend(dm_args, "-net", "none", NULL);
}
if (libxl_defbool_val(b_info->u.hvm.gfx_passthru)) {
switch (b_info->u.hvm.gfx_passthru_kind) {
case LIBXL_GFX_PASSTHRU_KIND_DEFAULT:
case LIBXL_GFX_PASSTHRU_KIND_IGD:
flexarray_append(dm_args, "-gfx_passthru");
break;
default:
LOG(ERROR, "unsupported gfx_passthru_kind.");
return ERROR_INVAL;
}
}
} else {
if (!sdl && !vnc)
flexarray_append(dm_args, "-nographic");
}
if (state->saved_state) {
flexarray_vappend(dm_args, "-loadvm", state->saved_state, NULL);
}
for (i = 0; b_info->extra && b_info->extra[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra[i]);
flexarray_append(dm_args, "-M");
switch (b_info->type) {
case LIBXL_DOMAIN_TYPE_PV:
flexarray_append(dm_args, "xenpv");
for (i = 0; b_info->extra_pv && b_info->extra_pv[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra_pv[i]);
break;
case LIBXL_DOMAIN_TYPE_HVM:
flexarray_append(dm_args, "xenfv");
for (i = 0; b_info->extra_hvm && b_info->extra_hvm[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra_hvm[i]);
break;
default:
abort();
}
flexarray_append(dm_args, NULL);
*args = (char **) flexarray_contents(dm_args);
flexarray_append(dm_envs, NULL);
if (envs)
*envs = (char **) flexarray_contents(dm_envs);
return 0;
}
static const char *qemu_disk_format_string(libxl_disk_format format)
{
switch (format) {
case LIBXL_DISK_FORMAT_QCOW: return "qcow";
case LIBXL_DISK_FORMAT_QCOW2: return "qcow2";
case LIBXL_DISK_FORMAT_VHD: return "vpc";
case LIBXL_DISK_FORMAT_RAW: return "raw";
case LIBXL_DISK_FORMAT_EMPTY: return NULL;
default: return NULL;
}
}
static char *dm_spice_options(libxl__gc *gc,
const libxl_spice_info *spice)
{
char *opt;
if (!spice->port && !spice->tls_port) {
LOG(ERROR,
"at least one of the spiceport or tls_port must be provided");
return NULL;
}
if (!libxl_defbool_val(spice->disable_ticketing)) {
if (!spice->passwd) {
LOG(ERROR, "spice ticketing is enabled but missing password");
return NULL;
}
else if (!spice->passwd[0]) {
LOG(ERROR, "spice password can't be empty");
return NULL;
}
}
opt = GCSPRINTF("port=%d,tls-port=%d", spice->port, spice->tls_port);
if (spice->host)
opt = GCSPRINTF("%s,addr=%s", opt, spice->host);
if (libxl_defbool_val(spice->disable_ticketing))
opt = GCSPRINTF("%s,disable-ticketing", opt);
else
opt = GCSPRINTF("%s,password=%s", opt, spice->passwd);
opt = GCSPRINTF("%s,agent-mouse=%s", opt,
libxl_defbool_val(spice->agent_mouse) ? "on" : "off");
if (!libxl_defbool_val(spice->clipboard_sharing))
opt = GCSPRINTF("%s,disable-copy-paste", opt);
if (spice->image_compression)
opt = GCSPRINTF("%s,image-compression=%s", opt,
spice->image_compression);
if (spice->streaming_video)
opt = GCSPRINTF("%s,streaming-video=%s", opt, spice->streaming_video);
return opt;
}
static enum libxl_gfx_passthru_kind
libxl__detect_gfx_passthru_kind(libxl__gc *gc,
const libxl_domain_config *guest_config)
{
const libxl_domain_build_info *b_info = &guest_config->b_info;
if (b_info->u.hvm.gfx_passthru_kind != LIBXL_GFX_PASSTHRU_KIND_DEFAULT)
return b_info->u.hvm.gfx_passthru_kind;
if (libxl__is_igd_vga_passthru(gc, guest_config)) {
return LIBXL_GFX_PASSTHRU_KIND_IGD;
}
return LIBXL_GFX_PASSTHRU_KIND_DEFAULT;
}
/* return 1 if the user was found, 0 if it was not, -1 on error */
static int libxl__dm_runas_helper(libxl__gc *gc, const char *username)
{
struct passwd pwd, *user = NULL;
char *buf = NULL;
long buf_size;
int ret;
buf_size = sysconf(_SC_GETPW_R_SIZE_MAX);
if (buf_size < 0) {
LOGE(ERROR, "sysconf(_SC_GETPW_R_SIZE_MAX) returned error %ld",
buf_size);
return ERROR_FAIL;
}
while (1) {
buf = libxl__realloc(gc, buf, buf_size);
ret = getpwnam_r(username, &pwd, buf, buf_size, &user);
if (ret == ERANGE) {
buf_size += 128;
continue;
}
if (ret != 0)
return ERROR_FAIL;
if (user != NULL)
return 1;
return 0;
}
}
static int libxl__build_device_model_args_new(libxl__gc *gc,
const char *dm, int guest_domid,
const libxl_domain_config *guest_config,
char ***args, char ***envs,
const libxl__domain_build_state *state,
int *dm_state_fd)
{
const libxl_domain_create_info *c_info = &guest_config->c_info;
const libxl_domain_build_info *b_info = &guest_config->b_info;
const libxl_device_disk *disks = guest_config->disks;
const libxl_device_nic *nics = guest_config->nics;
const int num_disks = guest_config->num_disks;
const int num_nics = guest_config->num_nics;
const libxl_vnc_info *vnc = libxl__dm_vnc(guest_config);
const libxl_sdl_info *sdl = dm_sdl(guest_config);
const char *keymap = dm_keymap(guest_config);
char *machinearg;
flexarray_t *dm_args, *dm_envs;
int i, connection, devid, ret;
uint64_t ram_size;
const char *path, *chardev;
char *user = NULL;
dm_args = flexarray_make(gc, 16, 1);
dm_envs = flexarray_make(gc, 16, 1);
flexarray_vappend(dm_args, dm,
"-xen-domid",
GCSPRINTF("%d", guest_domid), NULL);
flexarray_append(dm_args, "-chardev");
flexarray_append(dm_args,
GCSPRINTF("socket,id=libxl-cmd,"
"path=%s/qmp-libxl-%d,server,nowait",
libxl__run_dir_path(), guest_domid));
flexarray_append(dm_args, "-no-shutdown");
flexarray_append(dm_args, "-mon");
flexarray_append(dm_args, "chardev=libxl-cmd,mode=control");
flexarray_append(dm_args, "-chardev");
flexarray_append(dm_args,
GCSPRINTF("socket,id=libxenstat-cmd,"
"path=%s/qmp-libxenstat-%d,server,nowait",
libxl__run_dir_path(), guest_domid));
flexarray_append(dm_args, "-mon");
flexarray_append(dm_args, "chardev=libxenstat-cmd,mode=control");
for (i = 0; i < guest_config->num_channels; i++) {
connection = guest_config->channels[i].connection;
devid = guest_config->channels[i].devid;
switch (connection) {
case LIBXL_CHANNEL_CONNECTION_PTY:
chardev = GCSPRINTF("pty,id=libxl-channel%d", devid);
break;
case LIBXL_CHANNEL_CONNECTION_SOCKET:
path = guest_config->channels[i].u.socket.path;
chardev = GCSPRINTF("socket,id=libxl-channel%d,path=%s,"
"server,nowait", devid, path);
break;
default:
/* We've forgotten to add the clause */
LOG(ERROR, "%s: unknown channel connection %d",
__func__, connection);
return ERROR_INVAL;
}
flexarray_append(dm_args, "-chardev");
flexarray_append(dm_args, (void*)chardev);
}
/*
* Remove default devices created by qemu. Qemu will create only devices
* defined by xen, since the devices not defined by xen are not usable.
*/
flexarray_append(dm_args, "-nodefaults");
if (b_info->type == LIBXL_DOMAIN_TYPE_PV) {
flexarray_append(dm_args, "-xen-attach");
}
if (c_info->name) {
flexarray_vappend(dm_args, "-name", c_info->name, NULL);
}
if (vnc) {
char *vncarg = NULL;
flexarray_append(dm_args, "-vnc");
/*
* If vnc->listen is present and contains a :, and
* - vnc->display is 0, use vnc->listen
* - vnc->display is non-zero, be confused
* If vnc->listen is present but doesn't, use vnc->listen:vnc->display.
* If vnc->listen is not present, use 127.0.0.1:vnc->display
* (Remembering that vnc->display already defaults to 0.)
*/
if (vnc->listen) {
if (strchr(vnc->listen, ':') != NULL) {
if (vnc->display) {
LOG(ERROR, "vncdisplay set, vnclisten contains display");
return ERROR_INVAL;
}
vncarg = vnc->listen;
} else {
vncarg = GCSPRINTF("%s:%d", vnc->listen, vnc->display);
}
} else
vncarg = GCSPRINTF("127.0.0.1:%d", vnc->display);
if (vnc->passwd && vnc->passwd[0]) {
vncarg = GCSPRINTF("%s,password", vncarg);
}
if (libxl_defbool_val(vnc->findunused)) {
/* This option asks to QEMU to try this number of port before to
* give up. So QEMU will try ports between $display and $display +
* 99. This option needs to be the last one of the vnc options. */
vncarg = GCSPRINTF("%s,to=99", vncarg);
}
flexarray_append(dm_args, vncarg);
} else
/*
* Ensure that by default no vnc server is created.
*/
flexarray_append_pair(dm_args, "-vnc", "none");
/*
* Ensure that by default no display backend is created. Further
* options given below might then enable more.
*/
flexarray_append_pair(dm_args, "-display", "none");
if (sdl) {
flexarray_append(dm_args, "-sdl");
if (sdl->display)
flexarray_append_pair(dm_envs, "DISPLAY", sdl->display);
if (sdl->xauthority)
flexarray_append_pair(dm_envs, "XAUTHORITY", sdl->xauthority);
}
if (keymap) {
flexarray_vappend(dm_args, "-k", keymap, NULL);
}
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
int ioemu_nics = 0;
if (b_info->kernel)
flexarray_vappend(dm_args, "-kernel", b_info->kernel, NULL);
if (b_info->ramdisk)
flexarray_vappend(dm_args, "-initrd", b_info->ramdisk, NULL);
if (b_info->cmdline)
flexarray_vappend(dm_args, "-append", b_info->cmdline, NULL);
if (b_info->u.hvm.serial || b_info->u.hvm.serial_list) {
if ( b_info->u.hvm.serial && b_info->u.hvm.serial_list )
{
LOG(ERROR, "Both serial and serial_list set");
return ERROR_INVAL;
}
if (b_info->u.hvm.serial) {
flexarray_vappend(dm_args,
"-serial", b_info->u.hvm.serial, NULL);
} else if (b_info->u.hvm.serial_list) {
char **p;
for (p = b_info->u.hvm.serial_list;
*p;
p++) {
flexarray_vappend(dm_args,
"-serial",
*p, NULL);
}
}
}
if (libxl_defbool_val(b_info->u.hvm.nographic) && (!sdl && !vnc)) {
flexarray_append(dm_args, "-nographic");
}
if (libxl_defbool_val(b_info->u.hvm.spice.enable)) {
const libxl_spice_info *spice = &b_info->u.hvm.spice;
char *spiceoptions = dm_spice_options(gc, spice);
if (!spiceoptions)
return ERROR_INVAL;
flexarray_append(dm_args, "-spice");
flexarray_append(dm_args, spiceoptions);
if (libxl_defbool_val(b_info->u.hvm.spice.vdagent)) {
flexarray_vappend(dm_args, "-device", "virtio-serial",
"-chardev", "spicevmc,id=vdagent,name=vdagent", "-device",
"virtserialport,chardev=vdagent,name=com.redhat.spice.0",
NULL);
}
}
switch (b_info->u.hvm.vga.kind) {
case LIBXL_VGA_INTERFACE_TYPE_STD:
flexarray_append_pair(dm_args, "-device",
GCSPRINTF("VGA,vgamem_mb=%d",
libxl__sizekb_to_mb(b_info->video_memkb)));
break;
case LIBXL_VGA_INTERFACE_TYPE_CIRRUS:
flexarray_append_pair(dm_args, "-device",
GCSPRINTF("cirrus-vga,vgamem_mb=%d",
libxl__sizekb_to_mb(b_info->video_memkb)));
break;
case LIBXL_VGA_INTERFACE_TYPE_NONE:
break;
case LIBXL_VGA_INTERFACE_TYPE_QXL:
/* QXL have 2 ram regions, ram and vram */
flexarray_append_pair(dm_args, "-device",
GCSPRINTF("qxl-vga,vram_size_mb=%"PRIu64",ram_size_mb=%"PRIu64,
(b_info->video_memkb/2/1024), (b_info->video_memkb/2/1024) ) );
break;
}
if (b_info->u.hvm.boot) {
flexarray_vappend(dm_args, "-boot",
GCSPRINTF("order=%s", b_info->u.hvm.boot), NULL);
}
if (libxl_defbool_val(b_info->u.hvm.usb)
|| b_info->u.hvm.usbdevice
|| b_info->u.hvm.usbdevice_list) {
if ( b_info->u.hvm.usbdevice && b_info->u.hvm.usbdevice_list )
{
LOG(ERROR, "Both usbdevice and usbdevice_list set");
return ERROR_INVAL;
}
flexarray_append(dm_args, "-usb");
if (b_info->u.hvm.usbdevice) {
flexarray_vappend(dm_args,
"-usbdevice", b_info->u.hvm.usbdevice, NULL);
} else if (b_info->u.hvm.usbdevice_list) {
char **p;
for (p = b_info->u.hvm.usbdevice_list;
*p;
p++) {
flexarray_vappend(dm_args,
"-usbdevice",
*p, NULL);
}
}
} else if (b_info->u.hvm.usbversion) {
switch (b_info->u.hvm.usbversion) {
case 1:
flexarray_vappend(dm_args,
"-device", "piix3-usb-uhci,id=usb", NULL);
break;
case 2:
flexarray_append_pair(dm_args, "-device",
"ich9-usb-ehci1,id=usb,addr=0x1d.0x7,multifunction=on");
for (i = 1; i < 4; i++)
flexarray_append_pair(dm_args, "-device",
GCSPRINTF("ich9-usb-uhci%d,masterbus=usb.0,"
"firstport=%d,addr=0x1d.%#x,multifunction=on",
i, 2*(i-1), i-1));
break;
case 3:
flexarray_vappend(dm_args,
"-device", "nec-usb-xhci,id=usb", NULL);
break;
default:
LOG(ERROR, "usbversion parameter is invalid, "
"must be between 1 and 3");
return ERROR_INVAL;
}
if (b_info->u.hvm.spice.usbredirection >= 0 &&
b_info->u.hvm.spice.usbredirection < 5) {
for (i = 1; i <= b_info->u.hvm.spice.usbredirection; i++)
flexarray_vappend(dm_args, "-chardev",
GCSPRINTF("spicevmc,name=usbredir,id=usbrc%d", i),
"-device",
GCSPRINTF("usb-redir,chardev=usbrc%d,"
"id=usbrc%d", i, i), NULL);
} else {
LOG(ERROR, "usbredirection parameter is invalid, "
"it must be between 1 and 4");
return ERROR_INVAL;
}
}
if (b_info->u.hvm.soundhw) {
flexarray_vappend(dm_args, "-soundhw", b_info->u.hvm.soundhw, NULL);
}
if (!libxl_defbool_val(b_info->u.hvm.acpi)) {
flexarray_append(dm_args, "-no-acpi");
}
if (b_info->max_vcpus > 1) {
flexarray_append(dm_args, "-smp");
if (b_info->avail_vcpus.size) {
int nr_set_cpus = 0;
nr_set_cpus = libxl_bitmap_count_set(&b_info->avail_vcpus);
flexarray_append(dm_args, GCSPRINTF("%d,maxcpus=%d",
nr_set_cpus,
b_info->max_vcpus));
} else
flexarray_append(dm_args, GCSPRINTF("%d", b_info->max_vcpus));
}
for (i = 0; i < num_nics; i++) {
if (nics[i].nictype == LIBXL_NIC_TYPE_VIF_IOEMU) {
char *smac = GCSPRINTF(LIBXL_MAC_FMT,
LIBXL_MAC_BYTES(nics[i].mac));
const char *ifname = libxl__device_nic_devname(gc,
guest_domid, nics[i].devid,
LIBXL_NIC_TYPE_VIF_IOEMU);
flexarray_append(dm_args, "-device");
flexarray_append(dm_args,
GCSPRINTF("%s,id=nic%d,netdev=net%d,mac=%s",
nics[i].model, nics[i].devid,
nics[i].devid, smac));
flexarray_append(dm_args, "-netdev");
flexarray_append(dm_args,
GCSPRINTF("type=tap,id=net%d,ifname=%s,"
"script=%s,downscript=%s",
nics[i].devid, ifname,
libxl_tapif_script(gc),
libxl_tapif_script(gc)));
ioemu_nics++;
}
}
/* If we have no emulated nics, tell qemu not to create any */
if ( ioemu_nics == 0 ) {
flexarray_append(dm_args, "-net");
flexarray_append(dm_args, "none");
}
} else {
if (!sdl && !vnc) {
flexarray_append(dm_args, "-nographic");
}
}
if (state->saved_state) {
/* This file descriptor is meant to be used by QEMU */
*dm_state_fd = open(state->saved_state, O_RDONLY);
flexarray_append(dm_args, "-incoming");
flexarray_append(dm_args, GCSPRINTF("fd:%d",*dm_state_fd));
}
for (i = 0; b_info->extra && b_info->extra[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra[i]);
flexarray_append(dm_args, "-machine");
switch (b_info->type) {
case LIBXL_DOMAIN_TYPE_PV:
flexarray_append(dm_args, "xenpv");
for (i = 0; b_info->extra_pv && b_info->extra_pv[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra_pv[i]);
break;
case LIBXL_DOMAIN_TYPE_HVM:
if (!libxl_defbool_val(b_info->u.hvm.xen_platform_pci)) {
/* Switching here to the machine "pc" which does not add
* the xen-platform device instead of the default "xenfv" machine.
*/
machinearg = libxl__strdup(gc, "pc,accel=xen");
} else {
machinearg = libxl__strdup(gc, "xenfv");
}
if (b_info->u.hvm.mmio_hole_memkb) {
uint64_t max_ram_below_4g = (1ULL << 32) -
(b_info->u.hvm.mmio_hole_memkb << 10);
if (max_ram_below_4g > HVM_BELOW_4G_MMIO_START) {
LOG(WARN, "mmio_hole_memkb=%"PRIu64
" invalid ignored.\n",
b_info->u.hvm.mmio_hole_memkb);
} else {
machinearg = GCSPRINTF("%s,max-ram-below-4g=%"PRIu64,
machinearg, max_ram_below_4g);
}
}
if (libxl_defbool_val(b_info->u.hvm.gfx_passthru)) {
enum libxl_gfx_passthru_kind gfx_passthru_kind =
libxl__detect_gfx_passthru_kind(gc, guest_config);
switch (gfx_passthru_kind) {
case LIBXL_GFX_PASSTHRU_KIND_IGD:
machinearg = GCSPRINTF("%s,igd-passthru=on", machinearg);
break;
case LIBXL_GFX_PASSTHRU_KIND_DEFAULT:
LOG(ERROR, "unable to detect required gfx_passthru_kind");
return ERROR_FAIL;
default:
LOG(ERROR, "invalid value for gfx_passthru_kind");
return ERROR_INVAL;
}
}
flexarray_append(dm_args, machinearg);
for (i = 0; b_info->extra_hvm && b_info->extra_hvm[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra_hvm[i]);
break;
default:
abort();
}
ram_size = libxl__sizekb_to_mb(b_info->max_memkb - b_info->video_memkb);
flexarray_append(dm_args, "-m");
flexarray_append(dm_args, GCSPRINTF("%"PRId64, ram_size));
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
if (b_info->u.hvm.hdtype == LIBXL_HDTYPE_AHCI)
flexarray_append_pair(dm_args, "-device", "ahci,id=ahci0");
for (i = 0; i < num_disks; i++) {
int disk, part;
int dev_number =
libxl__device_disk_dev_number(disks[i].vdev, &disk, &part);
const char *format = qemu_disk_format_string(disks[i].format);
char *drive;
const char *pdev_path;
if (dev_number == -1) {
LOG(WARN, "unable to determine"" disk number for %s",
disks[i].vdev);
continue;
}
if (disks[i].is_cdrom) {
if (disks[i].format == LIBXL_DISK_FORMAT_EMPTY)
drive = libxl__sprintf
(gc, "if=ide,index=%d,readonly=%s,media=cdrom,cache=writeback,id=ide-%i",
disk, disks[i].readwrite ? "off" : "on", dev_number);
else
drive = libxl__sprintf
(gc, "file=%s,if=ide,index=%d,readonly=%s,media=cdrom,format=%s,cache=writeback,id=ide-%i",
disks[i].pdev_path, disk, disks[i].readwrite ? "off" : "on", format, dev_number);
} else {
if (disks[i].format == LIBXL_DISK_FORMAT_EMPTY) {
LOG(WARN, "cannot support"" empty disk format for %s",
disks[i].vdev);
continue;
}
if (format == NULL) {
LOG(WARN,
"unable to determine"" disk image format %s",
disks[i].vdev);
continue;
}
if (disks[i].backend == LIBXL_DISK_BACKEND_TAP) {
format = qemu_disk_format_string(LIBXL_DISK_FORMAT_RAW);
pdev_path = libxl__blktap_devpath(gc, disks[i].pdev_path,
disks[i].format);
} else {
pdev_path = disks[i].pdev_path;
}
/*
* Explicit sd disks are passed through as is.
*
* For other disks we translate devices 0..3 into
* hd[a-d] and ignore the rest.
*/
if (strncmp(disks[i].vdev, "sd", 2) == 0) {
drive = libxl__sprintf
(gc, "file=%s,if=scsi,bus=0,unit=%d,format=%s,readonly=%s,cache=writeback",
pdev_path, disk, format, disks[i].readwrite ? "off" : "on");
} else if (strncmp(disks[i].vdev, "xvd", 3) == 0) {
/*
* Do not add any emulated disk when PV disk are
* explicitly asked for.
*/
continue;
} else if (disk < 6 && b_info->u.hvm.hdtype == LIBXL_HDTYPE_AHCI) {
if (!disks[i].readwrite) {
LOG(ERROR, "qemu-xen doesn't support read-only AHCI disk drivers");
return ERROR_INVAL;
}
flexarray_vappend(dm_args, "-drive",
GCSPRINTF("file=%s,if=none,id=ahcidisk-%d,format=%s,cache=writeback",
pdev_path, disk, format),
"-device", GCSPRINTF("ide-hd,bus=ahci0.%d,unit=0,drive=ahcidisk-%d",
disk, disk), NULL);
continue;
} else if (disk < 4) {
if (!disks[i].readwrite) {
LOG(ERROR, "qemu-xen doesn't support read-only IDE disk drivers");
return ERROR_INVAL;
}
drive = libxl__sprintf
(gc, "file=%s,if=ide,index=%d,media=disk,format=%s,cache=writeback",
pdev_path, disk, format);
} else {
continue; /* Do not emulate this disk */
}
}
flexarray_append(dm_args, "-drive");
flexarray_append(dm_args, drive);
}
switch (b_info->u.hvm.vendor_device) {
case LIBXL_VENDOR_DEVICE_XENSERVER:
flexarray_append(dm_args, "-device");
flexarray_append(dm_args, "xen-pvdevice,device-id=0xc000");
break;
default:
break;
}
if (b_info->device_model_user) {
user = b_info->device_model_user;
goto end_search;
}
user = GCSPRINTF("%s%d", LIBXL_QEMU_USER_BASE, guest_domid);
ret = libxl__dm_runas_helper(gc, user);
if (ret < 0)
return ret;
if (ret > 0)
goto end_search;
user = LIBXL_QEMU_USER_SHARED;
ret = libxl__dm_runas_helper(gc, user);
if (ret < 0)
return ret;
if (ret > 0) {
LOG(WARN, "Could not find user %s%d, falling back to %s",
LIBXL_QEMU_USER_BASE, guest_domid, LIBXL_QEMU_USER_SHARED);
goto end_search;
}
user = NULL;
LOG(WARN, "Could not find user %s, starting QEMU as root",
LIBXL_QEMU_USER_SHARED);
end_search:
if (user != NULL && strcmp(user, "root")) {
flexarray_append(dm_args, "-runas");
flexarray_append(dm_args, user);
}
}
flexarray_append(dm_args, NULL);
*args = (char **) flexarray_contents(dm_args);
flexarray_append(dm_envs, NULL);
if (envs)
*envs = (char **) flexarray_contents(dm_envs);
return 0;
}
static int libxl__build_device_model_args(libxl__gc *gc,
const char *dm, int guest_domid,
const libxl_domain_config *guest_config,
char ***args, char ***envs,
const libxl__domain_build_state *state,
int *dm_state_fd)
/* dm_state_fd may be NULL iff caller knows we are using old stubdom
* and therefore will be passing a filename rather than a fd. */
{
switch (guest_config->b_info.device_model_version) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
return libxl__build_device_model_args_old(gc, dm,
guest_domid, guest_config,
args, envs,
state);
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
assert(dm_state_fd != NULL);
assert(*dm_state_fd < 0);
return libxl__build_device_model_args_new(gc, dm,
guest_domid, guest_config,
args, envs,
state, dm_state_fd);
default:
LOGE(ERROR, "unknown device model version %d",
guest_config->b_info.device_model_version);
return ERROR_INVAL;
}
}
static void libxl__dm_vifs_from_hvm_guest_config(libxl__gc *gc,
libxl_domain_config * const guest_config,
libxl_domain_config *dm_config)
{
int i, nr = guest_config->num_nics;
GCNEW_ARRAY(dm_config->nics, nr);
for (i=0; i<nr; i++) {
dm_config->nics[i] = guest_config->nics[i];
dm_config->nics[i].nictype = LIBXL_NIC_TYPE_VIF;
if (dm_config->nics[i].ifname)
dm_config->nics[i].ifname = GCSPRINTF("%s" TAP_DEVICE_SUFFIX,
dm_config->nics[i].ifname);
}
dm_config->num_nics = nr;
}
static int libxl__vfb_and_vkb_from_hvm_guest_config(libxl__gc *gc,
const libxl_domain_config *guest_config,
libxl_device_vfb *vfb,
libxl_device_vkb *vkb)
{
const libxl_domain_build_info *b_info = &guest_config->b_info;
if (b_info->type != LIBXL_DOMAIN_TYPE_HVM)
return ERROR_INVAL;
libxl_device_vfb_init(vfb);
libxl_device_vkb_init(vkb);
vfb->backend_domid = 0;
vfb->devid = 0;
vfb->vnc = b_info->u.hvm.vnc;
vfb->keymap = b_info->u.hvm.keymap;
vfb->sdl = b_info->u.hvm.sdl;
vkb->backend_domid = 0;
vkb->devid = 0;
return 0;
}
static int libxl__write_stub_dmargs(libxl__gc *gc,
int dm_domid, int guest_domid,
char **args)
{
libxl_ctx *ctx = libxl__gc_owner(gc);
int i;
char *vm_path;
char *dmargs, *path;
int dmargs_size;
struct xs_permissions roperm[2];
xs_transaction_t t;
roperm[0].id = 0;
roperm[0].perms = XS_PERM_NONE;
roperm[1].id = dm_domid;
roperm[1].perms = XS_PERM_READ;
vm_path = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("/local/domain/%d/vm", guest_domid));
i = 0;
dmargs_size = 0;
while (args[i] != NULL) {
dmargs_size = dmargs_size + strlen(args[i]) + 1;
i++;
}
dmargs_size++;
dmargs = (char *) libxl__malloc(gc, dmargs_size);
i = 1;
dmargs[0] = '\0';
while (args[i] != NULL) {
if (strcmp(args[i], "-sdl") && strcmp(args[i], "-M") && strcmp(args[i], "xenfv")) {
strcat(dmargs, " ");
strcat(dmargs, args[i]);
}
i++;
}
path = GCSPRINTF("%s/image/dmargs", vm_path);
retry_transaction:
t = xs_transaction_start(ctx->xsh);
xs_write(ctx->xsh, t, path, dmargs, strlen(dmargs));
xs_set_permissions(ctx->xsh, t, path, roperm, ARRAY_SIZE(roperm));
xs_set_permissions(ctx->xsh, t, GCSPRINTF("%s/rtc/timeoffset", vm_path), roperm, ARRAY_SIZE(roperm));
if (!xs_transaction_end(ctx->xsh, t, 0))
if (errno == EAGAIN)
goto retry_transaction;
return 0;
}
static void spawn_stubdom_pvqemu_cb(libxl__egc *egc,
libxl__dm_spawn_state *stubdom_dmss,
int rc);
static void spawn_stub_launch_dm(libxl__egc *egc,
libxl__multidev *aodevs, int ret);
static void stubdom_pvqemu_cb(libxl__egc *egc,
libxl__multidev *aodevs,
int rc);
static void stubdom_xswait_cb(libxl__egc *egc, libxl__xswait_state *xswait,
int rc, const char *p);
char *libxl__stub_dm_name(libxl__gc *gc, const char *guest_name)
{
return GCSPRINTF("%s-dm", guest_name);
}
void libxl__spawn_stub_dm(libxl__egc *egc, libxl__stub_dm_spawn_state *sdss)
{
STATE_AO_GC(sdss->dm.spawn.ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
int ret;
libxl_device_vfb *vfb;
libxl_device_vkb *vkb;
char **args;
struct xs_permissions perm[2];
xs_transaction_t t;
/* convenience aliases */
libxl_domain_config *const dm_config = &sdss->dm_config;
libxl_domain_config *const guest_config = sdss->dm.guest_config;
const int guest_domid = sdss->dm.guest_domid;
libxl__domain_build_state *const d_state = sdss->dm.build_state;
libxl__domain_build_state *const stubdom_state = &sdss->dm_state;
if (guest_config->b_info.device_model_version !=
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL) {
ret = ERROR_INVAL;
goto out;
}
sdss->pvqemu.guest_domid = 0;
libxl_domain_create_info_init(&dm_config->c_info);
dm_config->c_info.type = LIBXL_DOMAIN_TYPE_PV;
dm_config->c_info.name = libxl__stub_dm_name(gc,
libxl__domid_to_name(gc, guest_domid));
/* When we are here to launch stubdom, ssidref is a valid value
* already, no need to parse it again.
*/
dm_config->c_info.ssidref = guest_config->b_info.device_model_ssidref;
dm_config->c_info.ssid_label = NULL;
libxl_uuid_generate(&dm_config->c_info.uuid);
libxl_domain_build_info_init(&dm_config->b_info);
libxl_domain_build_info_init_type(&dm_config->b_info, LIBXL_DOMAIN_TYPE_PV);
dm_config->b_info.max_vcpus = 1;
dm_config->b_info.max_memkb = 28 * 1024 +
guest_config->b_info.video_memkb;
dm_config->b_info.target_memkb = dm_config->b_info.max_memkb;
dm_config->b_info.u.pv.features = "";
dm_config->b_info.device_model_version =
guest_config->b_info.device_model_version;
dm_config->b_info.device_model =
guest_config->b_info.device_model;
dm_config->b_info.extra = guest_config->b_info.extra;
dm_config->b_info.extra_pv = guest_config->b_info.extra_pv;
dm_config->b_info.extra_hvm = guest_config->b_info.extra_hvm;
dm_config->disks = guest_config->disks;
dm_config->num_disks = guest_config->num_disks;
libxl__dm_vifs_from_hvm_guest_config(gc, guest_config, dm_config);
dm_config->c_info.run_hotplug_scripts =
guest_config->c_info.run_hotplug_scripts;
ret = libxl__domain_create_info_setdefault(gc, &dm_config->c_info);
if (ret) goto out;
ret = libxl__domain_build_info_setdefault(gc, &dm_config->b_info);
if (ret) goto out;
GCNEW(vfb);
GCNEW(vkb);
libxl__vfb_and_vkb_from_hvm_guest_config(gc, guest_config, vfb, vkb);
dm_config->vfbs = vfb;
dm_config->num_vfbs = 1;
dm_config->vkbs = vkb;
dm_config->num_vkbs = 1;
stubdom_state->pv_kernel.path
= libxl__abs_path(gc, "ioemu-stubdom.gz", libxl__xenfirmwaredir_path());
stubdom_state->pv_cmdline = GCSPRINTF(" -d %d", guest_domid);
stubdom_state->pv_ramdisk.path = "";
/* fixme: this function can leak the stubdom if it fails */
ret = libxl__domain_make(gc, dm_config, &sdss->pvqemu.guest_domid,
&stubdom_state->config);
if (ret)
goto out;
uint32_t dm_domid = sdss->pvqemu.guest_domid;
ret = libxl__domain_build(gc, dm_config, dm_domid, stubdom_state);
if (ret)
goto out;
ret = libxl__build_device_model_args(gc, "stubdom-dm", guest_domid,
guest_config, &args, NULL,
d_state, NULL);
if (ret) {
ret = ERROR_FAIL;
goto out;
}
libxl__write_stub_dmargs(gc, dm_domid, guest_domid, args);
libxl__xs_printf(gc, XBT_NULL,
GCSPRINTF("%s/image/device-model-domid",
libxl__xs_get_dompath(gc, guest_domid)),
"%d", dm_domid);
libxl__xs_printf(gc, XBT_NULL,
GCSPRINTF("%s/target",
libxl__xs_get_dompath(gc, dm_domid)),
"%d", guest_domid);
ret = xc_domain_set_target(ctx->xch, dm_domid, guest_domid);
if (ret<0) {
LOGE(ERROR, "setting target domain %d -> %d", dm_domid, guest_domid);
ret = ERROR_FAIL;
goto out;
}
xs_set_target(ctx->xsh, dm_domid, guest_domid);
perm[0].id = dm_domid;
perm[0].perms = XS_PERM_NONE;
perm[1].id = guest_domid;
perm[1].perms = XS_PERM_READ;
retry_transaction:
t = xs_transaction_start(ctx->xsh);
xs_mkdir(ctx->xsh, t,
libxl__device_model_xs_path(gc, dm_domid, guest_domid, ""));
xs_set_permissions(ctx->xsh, t,
libxl__device_model_xs_path(gc, dm_domid,
guest_domid, ""),
perm, ARRAY_SIZE(perm));
if (!xs_transaction_end(ctx->xsh, t, 0))
if (errno == EAGAIN)
goto retry_transaction;
libxl__multidev_begin(ao, &sdss->multidev);
sdss->multidev.callback = spawn_stub_launch_dm;
libxl__add_disks(egc, ao, dm_domid, dm_config, &sdss->multidev);
libxl__multidev_prepared(egc, &sdss->multidev, 0);
return;
out:
assert(ret);
spawn_stubdom_pvqemu_cb(egc, &sdss->pvqemu, ret);
}
static void spawn_stub_launch_dm(libxl__egc *egc,
libxl__multidev *multidev, int ret)
{
libxl__stub_dm_spawn_state *sdss = CONTAINER_OF(multidev, *sdss, multidev);
STATE_AO_GC(sdss->dm.spawn.ao);
libxl_ctx *ctx = libxl__gc_owner(gc);
int i, num_console = STUBDOM_SPECIAL_CONSOLES;
libxl__device_console *console;
/* convenience aliases */
libxl_domain_config *const dm_config = &sdss->dm_config;
libxl_domain_config *const guest_config = sdss->dm.guest_config;
const int guest_domid = sdss->dm.guest_domid;
libxl__domain_build_state *const d_state = sdss->dm.build_state;
libxl__domain_build_state *const stubdom_state = &sdss->dm_state;
uint32_t dm_domid = sdss->pvqemu.guest_domid;
if (ret) {
LOG(ERROR, "error connecting disk devices");
goto out;
}
for (i = 0; i < dm_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, &dm_config->nics[i], dm_domid,
&dm_config->b_info);
if (ret)
goto out;
}
ret = libxl__device_vfb_add(gc, dm_domid, &dm_config->vfbs[0]);
if (ret)
goto out;
ret = libxl__device_vkb_add(gc, dm_domid, &dm_config->vkbs[0]);
if (ret)
goto out;
if (guest_config->b_info.u.hvm.serial)
num_console++;
console = libxl__calloc(gc, num_console, sizeof(libxl__device_console));
for (i = 0; i < num_console; i++) {
libxl__device device;
console[i].devid = i;
console[i].consback = LIBXL__CONSOLE_BACKEND_IOEMU;
/* STUBDOM_CONSOLE_LOGGING (console 0) is for minios logging
* STUBDOM_CONSOLE_SAVE (console 1) is for writing the save file
* STUBDOM_CONSOLE_RESTORE (console 2) is for reading the save file
*/
switch (i) {
char *filename;
char *name;
case STUBDOM_CONSOLE_LOGGING:
name = GCSPRINTF("qemu-dm-%s",
libxl_domid_to_name(ctx, guest_domid));
ret = libxl_create_logfile(ctx, name, &filename);
if (ret) goto out;
console[i].output = GCSPRINTF("file:%s", filename);
free(filename);
break;
case STUBDOM_CONSOLE_SAVE:
console[i].output = GCSPRINTF("file:%s",
libxl__device_model_savefile(gc, guest_domid));
break;
case STUBDOM_CONSOLE_RESTORE:
if (d_state->saved_state)
console[i].output =
GCSPRINTF("pipe:%s", d_state->saved_state);
break;
default:
console[i].output = "pty";
break;
}
ret = libxl__device_console_add(gc, dm_domid, &console[i],
i == STUBDOM_CONSOLE_LOGGING ? stubdom_state : NULL,
&device);
if (ret)
goto out;
}
sdss->pvqemu.spawn.ao = ao;
sdss->pvqemu.guest_domid = dm_domid;
sdss->pvqemu.guest_config = &sdss->dm_config;
sdss->pvqemu.build_state = &sdss->dm_state;
sdss->pvqemu.callback = spawn_stubdom_pvqemu_cb;
libxl__spawn_local_dm(egc, &sdss->pvqemu);
return;
out:
assert(ret);
spawn_stubdom_pvqemu_cb(egc, &sdss->pvqemu, ret);
}
static void spawn_stubdom_pvqemu_cb(libxl__egc *egc,
libxl__dm_spawn_state *stubdom_dmss,
int rc)
{
libxl__stub_dm_spawn_state *sdss =
CONTAINER_OF(stubdom_dmss, *sdss, pvqemu);
STATE_AO_GC(sdss->dm.spawn.ao);
uint32_t dm_domid = sdss->pvqemu.guest_domid;
libxl_domain_config *d_config = stubdom_dmss->guest_config;
if (rc) goto out;
if (d_config->num_nics > 0) {
libxl__multidev_begin(ao, &sdss->multidev);
sdss->multidev.callback = stubdom_pvqemu_cb;
libxl__add_nics(egc, ao, dm_domid, d_config, &sdss->multidev);
libxl__multidev_prepared(egc, &sdss->multidev, 0);
return;
}
out:
stubdom_pvqemu_cb(egc, &sdss->multidev, rc);
}
static void stubdom_pvqemu_cb(libxl__egc *egc,
libxl__multidev *multidev,
int rc)
{
libxl__stub_dm_spawn_state *sdss = CONTAINER_OF(multidev, *sdss, multidev);
STATE_AO_GC(sdss->dm.spawn.ao);
uint32_t dm_domid = sdss->pvqemu.guest_domid;
libxl__xswait_init(&sdss->xswait);
if (rc) {
LOGE(ERROR, "error connecting nics devices");
goto out;
}
rc = libxl_domain_unpause(CTX, dm_domid);
if (rc) goto out;
sdss->xswait.ao = ao;
sdss->xswait.what = GCSPRINTF("Stubdom %u for %u startup",
dm_domid, sdss->dm.guest_domid);
sdss->xswait.path =
libxl__device_model_xs_path(gc, dm_domid, sdss->dm.guest_domid,
"/state");
sdss->xswait.timeout_ms = LIBXL_STUBDOM_START_TIMEOUT * 1000;
sdss->xswait.callback = stubdom_xswait_cb;
rc = libxl__xswait_start(gc, &sdss->xswait);
if (rc) goto out;
return;
out:
stubdom_xswait_cb(egc, &sdss->xswait, rc, NULL);
}
static void stubdom_xswait_cb(libxl__egc *egc, libxl__xswait_state *xswait,
int rc, const char *p)
{
EGC_GC;
libxl__stub_dm_spawn_state *sdss = CONTAINER_OF(xswait, *sdss, xswait);
if (rc) {
if (rc == ERROR_TIMEDOUT)
LOG(ERROR, "%s: startup timed out", xswait->what);
goto out;
}
if (!p) return;
if (strcmp(p, "running"))
return;
out:
libxl__xswait_stop(gc, xswait);
sdss->callback(egc, &sdss->dm, rc);
}
/* callbacks passed to libxl__spawn_spawn */
static void device_model_confirm(libxl__egc *egc, libxl__spawn_state *spawn,
const char *xsdata);
static void device_model_startup_failed(libxl__egc *egc,
libxl__spawn_state *spawn,
int rc);
static void device_model_detached(libxl__egc *egc,
libxl__spawn_state *spawn);
/* our "next step" function, called from those callbacks and elsewhere */
static void device_model_spawn_outcome(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int rc);
void libxl__spawn_local_dm(libxl__egc *egc, libxl__dm_spawn_state *dmss)
{
/* convenience aliases */
const int domid = dmss->guest_domid;
libxl__domain_build_state *const state = dmss->build_state;
libxl__spawn_state *const spawn = &dmss->spawn;
STATE_AO_GC(dmss->spawn.ao);
libxl_ctx *ctx = CTX;
libxl_domain_config *guest_config = dmss->guest_config;
const libxl_domain_create_info *c_info = &guest_config->c_info;
const libxl_domain_build_info *b_info = &guest_config->b_info;
const libxl_vnc_info *vnc = libxl__dm_vnc(guest_config);
char *path;
int logfile_w, null;
int rc;
char **args, **arg, **envs;
xs_transaction_t t;
char *vm_path;
char **pass_stuff;
const char *dm;
int dm_state_fd = -1;
if (libxl_defbool_val(b_info->device_model_stubdomain)) {
abort();
}
dm = libxl__domain_device_model(gc, b_info);
if (!dm) {
rc = ERROR_FAIL;
goto out;
}
if (access(dm, X_OK) < 0) {
LOGE(ERROR, "device model %s is not executable", dm);
rc = ERROR_FAIL;
goto out;
}
rc = libxl__build_device_model_args(gc, dm, domid, guest_config,
&args, &envs, state,
&dm_state_fd);
if (rc)
goto out;
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
path = xs_get_domain_path(ctx->xsh, domid);
libxl__xs_printf(gc, XBT_NULL,
GCSPRINTF("%s/hvmloader/bios", path),
"%s", libxl_bios_type_to_string(b_info->u.hvm.bios));
/* Disable relocating memory to make the MMIO hole larger
* unless we're running qemu-traditional and vNUMA is not
* configured. */
libxl__xs_printf(gc, XBT_NULL,
GCSPRINTF("%s/hvmloader/allow-memory-relocate", path),
"%d",
b_info->device_model_version==LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL &&
!libxl__vnuma_configured(b_info));
free(path);
}
path = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID, domid, "");
xs_mkdir(ctx->xsh, XBT_NULL, path);
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM &&
b_info->device_model_version
== LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL)
libxl__xs_printf(gc, XBT_NULL, GCSPRINTF("%s/disable_pf", path),
"%d", !libxl_defbool_val(b_info->u.hvm.xen_platform_pci));
logfile_w = libxl__create_qemu_logfile(gc, GCSPRINTF("qemu-dm-%s",
c_info->name));
if (logfile_w < 0) {
rc = logfile_w;
goto out;
}
null = open("/dev/null", O_RDONLY);
if (null < 0) {
LOGE(ERROR, "unable to open /dev/null");
rc = ERROR_FAIL;
goto out_close;
}
const char *dom_path = libxl__xs_get_dompath(gc, domid);
spawn->pidpath = GCSPRINTF("%s/%s", dom_path, "image/device-model-pid");
if (vnc && vnc->passwd) {
/* This xenstore key will only be used by qemu-xen-traditionnal.
* The code to supply vncpasswd to qemu-xen is later. */
retry_transaction:
/* Find uuid and the write the vnc password to xenstore for qemu. */
t = xs_transaction_start(ctx->xsh);
vm_path = libxl__xs_read(gc,t,GCSPRINTF("%s/vm", dom_path));
if (vm_path) {
/* Now write the vncpassword into it. */
pass_stuff = libxl__calloc(gc, 3, sizeof(char *));
pass_stuff[0] = "vncpasswd";
pass_stuff[1] = vnc->passwd;
libxl__xs_writev(gc,t,vm_path,pass_stuff);
if (!xs_transaction_end(ctx->xsh, t, 0))
if (errno == EAGAIN)
goto retry_transaction;
}
}
LOG(DEBUG, "Spawning device-model %s with arguments:", dm);
for (arg = args; *arg; arg++)
LOG(DEBUG, " %s", *arg);
if (*envs) {
LOG(DEBUG, "Spawning device-model %s with additional environment:", dm);
for (arg = envs; *arg; arg += 2)
LOG(DEBUG, " %s=%s", arg[0], arg[1]);
}
spawn->what = GCSPRINTF("domain %d device model", domid);
spawn->xspath = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID,
domid, "/state");
spawn->timeout_ms = LIBXL_DEVICE_MODEL_START_TIMEOUT * 1000;
spawn->pidpath = GCSPRINTF("%s/image/device-model-pid", dom_path);
spawn->midproc_cb = libxl__spawn_record_pid;
spawn->confirm_cb = device_model_confirm;
spawn->failure_cb = device_model_startup_failed;
spawn->detached_cb = device_model_detached;
rc = libxl__spawn_spawn(egc, spawn);
if (rc < 0)
goto out_close;
if (!rc) { /* inner child */
setsid();
libxl__exec(gc, null, logfile_w, logfile_w, dm, args, envs);
}
rc = 0;
out_close:
if (null >= 0) close(null);
if (logfile_w >= 0) close(logfile_w);
out:
if (dm_state_fd >= 0) close(dm_state_fd);
if (rc)
device_model_spawn_outcome(egc, dmss, rc);
}
static void device_model_confirm(libxl__egc *egc, libxl__spawn_state *spawn,
const char *xsdata)
{
STATE_AO_GC(spawn->ao);
if (!xsdata)
return;
if (strcmp(xsdata, "running"))
return;
libxl__spawn_initiate_detach(gc, spawn);
}
static void device_model_startup_failed(libxl__egc *egc,
libxl__spawn_state *spawn,
int rc)
{
libxl__dm_spawn_state *dmss = CONTAINER_OF(spawn, *dmss, spawn);
device_model_spawn_outcome(egc, dmss, rc);
}
static void device_model_detached(libxl__egc *egc,
libxl__spawn_state *spawn)
{
libxl__dm_spawn_state *dmss = CONTAINER_OF(spawn, *dmss, spawn);
device_model_spawn_outcome(egc, dmss, 0);
}
static void device_model_spawn_outcome(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int rc)
{
STATE_AO_GC(dmss->spawn.ao);
int ret2;
if (rc)
LOG(ERROR, "%s: spawn failed (rc=%d)", dmss->spawn.what, rc);
libxl__domain_build_state *state = dmss->build_state;
if (state->saved_state) {
ret2 = unlink(state->saved_state);
if (ret2) {
LOGE(ERROR, "%s: failed to remove device-model state %s",
dmss->spawn.what, state->saved_state);
rc = ERROR_FAIL;
goto out;
}
}
out:
dmss->callback(egc, dmss, rc);
}
void libxl__spawn_qdisk_backend(libxl__egc *egc, libxl__dm_spawn_state *dmss)
{
STATE_AO_GC(dmss->spawn.ao);
flexarray_t *dm_args;
char **args;
const char *dm;
int logfile_w, null = -1, rc;
uint32_t domid = dmss->guest_domid;
/* Always use qemu-xen as device model */
dm = qemu_xen_path(gc);
dm_args = flexarray_make(gc, 15, 1);
flexarray_vappend(dm_args, dm, "-xen-domid",
GCSPRINTF("%d", domid), NULL);
flexarray_append(dm_args, "-xen-attach");
flexarray_vappend(dm_args, "-name",
GCSPRINTF("domain-%u", domid), NULL);
flexarray_append(dm_args, "-nographic");
flexarray_vappend(dm_args, "-M", "xenpv", NULL);
flexarray_vappend(dm_args, "-monitor", "/dev/null", NULL);
flexarray_vappend(dm_args, "-serial", "/dev/null", NULL);
flexarray_vappend(dm_args, "-parallel", "/dev/null", NULL);
flexarray_append(dm_args, NULL);
args = (char **) flexarray_contents(dm_args);
logfile_w = libxl__create_qemu_logfile(gc, GCSPRINTF("qdisk-%u", domid));
if (logfile_w < 0) {
rc = logfile_w;
goto error;
}
null = open("/dev/null", O_RDONLY);
if (null < 0) {
rc = ERROR_FAIL;
goto error;
}
dmss->guest_config = NULL;
/*
* Clearly specify Qemu not using a saved state, so
* device_model_spawn_outcome doesn't try to unlink it.
*/
dmss->build_state = libxl__zalloc(gc, sizeof(*dmss->build_state));
dmss->build_state->saved_state = 0;
dmss->spawn.what = GCSPRINTF("domain %u Qdisk backend", domid);
dmss->spawn.xspath = GCSPRINTF("device-model/%u/state", domid);
dmss->spawn.timeout_ms = LIBXL_DEVICE_MODEL_START_TIMEOUT * 1000;
/*
* We cannot save Qemu pid anywhere in the xenstore guest dir,
* because we will call this from unprivileged driver domains,
* so save it in the current domain libxl private dir.
*/
dmss->spawn.pidpath = GCSPRINTF("libxl/%u/qdisk-backend-pid", domid);
dmss->spawn.midproc_cb = libxl__spawn_record_pid;
dmss->spawn.confirm_cb = device_model_confirm;
dmss->spawn.failure_cb = device_model_startup_failed;
dmss->spawn.detached_cb = device_model_detached;
rc = libxl__spawn_spawn(egc, &dmss->spawn);
if (rc < 0)
goto error;
if (!rc) { /* inner child */
setsid();
libxl__exec(gc, null, logfile_w, logfile_w, dm, args, NULL);
}
return;
error:
assert(rc);
if (logfile_w >= 0) close(logfile_w);
if (null >= 0) close(null);
dmss->callback(egc, dmss, rc);
return;
}
/* Generic function to signal a Qemu instance to exit */
static int kill_device_model(libxl__gc *gc, const char *xs_path_pid)
{
const char *xs_pid;
int ret, pid;
ret = libxl__xs_read_checked(gc, XBT_NULL, xs_path_pid, &xs_pid);
if (ret || !xs_pid) {
LOG(ERROR, "unable to find device model pid in %s", xs_path_pid);
ret = ret ? : ERROR_FAIL;
goto out;
}
pid = atoi(xs_pid);
ret = kill(pid, SIGHUP);
if (ret < 0 && errno == ESRCH) {
LOG(ERROR, "Device Model already exited");
ret = 0;
} else if (ret == 0) {
LOG(DEBUG, "Device Model signaled");
ret = 0;
} else {
LOGE(ERROR, "failed to kill Device Model [%d]", pid);
ret = ERROR_FAIL;
goto out;
}
out:
return ret;
}
/* Helper to destroy a Qdisk backend */
int libxl__destroy_qdisk_backend(libxl__gc *gc, uint32_t domid)
{
char *pid_path;
int rc;
pid_path = GCSPRINTF("libxl/%u/qdisk-backend-pid", domid);
rc = kill_device_model(gc, pid_path);
if (rc)
goto out;
libxl__xs_rm_checked(gc, XBT_NULL, pid_path);
libxl__xs_rm_checked(gc, XBT_NULL,
GCSPRINTF("device-model/%u", domid));
out:
return rc;
}
int libxl__destroy_device_model(libxl__gc *gc, uint32_t domid)
{
char *path = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID,
domid, "");
if (!xs_rm(CTX->xsh, XBT_NULL, path))
LOG(ERROR, "xs_rm failed for %s", path);
/* We should try to destroy the device model anyway. */
return kill_device_model(gc,
GCSPRINTF("/local/domain/%d/image/device-model-pid", domid));
}
int libxl__need_xenpv_qemu(libxl__gc *gc,
int nr_consoles, libxl__device_console *consoles,
int nr_vfbs, libxl_device_vfb *vfbs,
int nr_disks, libxl_device_disk *disks,
int nr_channels, libxl_device_channel *channels)
{
int i, ret = 0;
uint32_t domid;
/*
* qemu is required in order to support 2 or more consoles. So switch all
* backends to qemu if this is the case
*/
if (nr_consoles > 1) {
for (i = 0; i < nr_consoles; i++)
consoles[i].consback = LIBXL__CONSOLE_BACKEND_IOEMU;
ret = 1;
goto out;
}
for (i = 0; i < nr_consoles; i++) {
if (consoles[i].consback == LIBXL__CONSOLE_BACKEND_IOEMU) {
ret = 1;
goto out;
}
}
if (nr_vfbs > 0) {
ret = 1;
goto out;
}
if (nr_disks > 0) {
ret = libxl__get_domid(gc, &domid);
if (ret) goto out;
for (i = 0; i < nr_disks; i++) {
if (disks[i].backend == LIBXL_DISK_BACKEND_QDISK &&
disks[i].backend_domid == domid) {
ret = 1;
goto out;
}
}
}
if (nr_channels > 0) {
ret = libxl__get_domid(gc, &domid);
if (ret) goto out;
for (i = 0; i < nr_channels; i++) {
if (channels[i].backend_domid == domid) {
/* xenconsoled is limited to the first console only.
Until this restriction is removed we must use qemu for
secondary consoles which includes all channels. */
ret = 1;
goto out;
}
}
}
out:
return ret;
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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