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FRET-qemu/qga/commands-posix.c
Luiz Capitulino 3674838cd0 qemu-ga: guest-shutdown: use only async-signal-safe functions 
POSIX mandates[1] that a child process of a multi-thread program uses
only async-signal-safe functions before exec(). We consider qemu-ga
to be multi-thread, because it uses glib.

However, qmp_guest_shutdown() uses functions that are not
async-signal-safe. Fix it the following way:

- fclose() -> reopen_fd_to_null()
- execl() -> execle()
- exit() -> _exit()
- drop slog() usage (which is not safe)

  [1] http://pubs.opengroup.org/onlinepubs/009695399/functions/fork.html

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2012-05-15 09:15:16 -05:00

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/*
* QEMU Guest Agent POSIX-specific command implementations
*
* Copyright IBM Corp. 2011
*
* Authors:
* Michael Roth <mdroth@linux.vnet.ibm.com>
* Michal Privoznik <mprivozn@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include <glib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include "qga/guest-agent-core.h"
#include "qga-qmp-commands.h"
#include "qerror.h"
#include "qemu-queue.h"
#include "host-utils.h"
#if defined(__linux__)
#include <mntent.h>
#include <linux/fs.h>
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/wait.h>
#if defined(__linux__) && defined(FIFREEZE)
#define CONFIG_FSFREEZE
#endif
#endif
void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
{
const char *shutdown_flag;
pid_t rpid, pid;
int status;
slog("guest-shutdown called, mode: %s", mode);
if (!has_mode || strcmp(mode, "powerdown") == 0) {
shutdown_flag = "-P";
} else if (strcmp(mode, "halt") == 0) {
shutdown_flag = "-H";
} else if (strcmp(mode, "reboot") == 0) {
shutdown_flag = "-r";
} else {
error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode",
"halt|powerdown|reboot");
return;
}
pid = fork();
if (pid == 0) {
/* child, start the shutdown */
setsid();
reopen_fd_to_null(0);
reopen_fd_to_null(1);
reopen_fd_to_null(2);
execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
"hypervisor initiated shutdown", (char*)NULL, environ);
_exit(EXIT_FAILURE);
} else if (pid < 0) {
goto exit_err;
}
do {
rpid = waitpid(pid, &status, 0);
} while (rpid == -1 && errno == EINTR);
if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) {
return;
}
exit_err:
error_set(err, QERR_UNDEFINED_ERROR);
}
typedef struct GuestFileHandle {
uint64_t id;
FILE *fh;
QTAILQ_ENTRY(GuestFileHandle) next;
} GuestFileHandle;
static struct {
QTAILQ_HEAD(, GuestFileHandle) filehandles;
} guest_file_state;
static void guest_file_handle_add(FILE *fh)
{
GuestFileHandle *gfh;
gfh = g_malloc0(sizeof(GuestFileHandle));
gfh->id = fileno(fh);
gfh->fh = fh;
QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
}
static GuestFileHandle *guest_file_handle_find(int64_t id)
{
GuestFileHandle *gfh;
QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
{
if (gfh->id == id) {
return gfh;
}
}
return NULL;
}
int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
{
FILE *fh;
int fd;
int64_t ret = -1;
if (!has_mode) {
mode = "r";
}
slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
fh = fopen(path, mode);
if (!fh) {
error_set(err, QERR_OPEN_FILE_FAILED, path);
return -1;
}
/* set fd non-blocking to avoid common use cases (like reading from a
* named pipe) from hanging the agent
*/
fd = fileno(fh);
ret = fcntl(fd, F_GETFL);
ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
if (ret == -1) {
error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed");
fclose(fh);
return -1;
}
guest_file_handle_add(fh);
slog("guest-file-open, handle: %d", fd);
return fd;
}
void qmp_guest_file_close(int64_t handle, Error **err)
{
GuestFileHandle *gfh = guest_file_handle_find(handle);
int ret;
slog("guest-file-close called, handle: %ld", handle);
if (!gfh) {
error_set(err, QERR_FD_NOT_FOUND, "handle");
return;
}
ret = fclose(gfh->fh);
if (ret == -1) {
error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed");
return;
}
QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
g_free(gfh);
}
struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
int64_t count, Error **err)
{
GuestFileHandle *gfh = guest_file_handle_find(handle);
GuestFileRead *read_data = NULL;
guchar *buf;
FILE *fh;
size_t read_count;
if (!gfh) {
error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
if (!has_count) {
count = QGA_READ_COUNT_DEFAULT;
} else if (count < 0) {
error_set(err, QERR_INVALID_PARAMETER, "count");
return NULL;
}
fh = gfh->fh;
buf = g_malloc0(count+1);
read_count = fread(buf, 1, count, fh);
if (ferror(fh)) {
slog("guest-file-read failed, handle: %ld", handle);
error_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed");
} else {
buf[read_count] = 0;
read_data = g_malloc0(sizeof(GuestFileRead));
read_data->count = read_count;
read_data->eof = feof(fh);
if (read_count) {
read_data->buf_b64 = g_base64_encode(buf, read_count);
}
}
g_free(buf);
clearerr(fh);
return read_data;
}
GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
bool has_count, int64_t count, Error **err)
{
GuestFileWrite *write_data = NULL;
guchar *buf;
gsize buf_len;
int write_count;
GuestFileHandle *gfh = guest_file_handle_find(handle);
FILE *fh;
if (!gfh) {
error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
fh = gfh->fh;
buf = g_base64_decode(buf_b64, &buf_len);
if (!has_count) {
count = buf_len;
} else if (count < 0 || count > buf_len) {
g_free(buf);
error_set(err, QERR_INVALID_PARAMETER, "count");
return NULL;
}
write_count = fwrite(buf, 1, count, fh);
if (ferror(fh)) {
slog("guest-file-write failed, handle: %ld", handle);
error_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error");
} else {
write_data = g_malloc0(sizeof(GuestFileWrite));
write_data->count = write_count;
write_data->eof = feof(fh);
}
g_free(buf);
clearerr(fh);
return write_data;
}
struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
int64_t whence, Error **err)
{
GuestFileHandle *gfh = guest_file_handle_find(handle);
GuestFileSeek *seek_data = NULL;
FILE *fh;
int ret;
if (!gfh) {
error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
fh = gfh->fh;
ret = fseek(fh, offset, whence);
if (ret == -1) {
error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
} else {
seek_data = g_malloc0(sizeof(GuestFileRead));
seek_data->position = ftell(fh);
seek_data->eof = feof(fh);
}
clearerr(fh);
return seek_data;
}
void qmp_guest_file_flush(int64_t handle, Error **err)
{
GuestFileHandle *gfh = guest_file_handle_find(handle);
FILE *fh;
int ret;
if (!gfh) {
error_set(err, QERR_FD_NOT_FOUND, "handle");
return;
}
fh = gfh->fh;
ret = fflush(fh);
if (ret == EOF) {
error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
}
}
static void guest_file_init(void)
{
QTAILQ_INIT(&guest_file_state.filehandles);
}
/* linux-specific implementations. avoid this if at all possible. */
#if defined(__linux__)
#if defined(CONFIG_FSFREEZE)
typedef struct GuestFsfreezeMount {
char *dirname;
char *devtype;
QTAILQ_ENTRY(GuestFsfreezeMount) next;
} GuestFsfreezeMount;
typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList;
static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts)
{
GuestFsfreezeMount *mount, *temp;
if (!mounts) {
return;
}
QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
QTAILQ_REMOVE(mounts, mount, next);
g_free(mount->dirname);
g_free(mount->devtype);
g_free(mount);
}
}
/*
* Walk the mount table and build a list of local file systems
*/
static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
{
struct mntent *ment;
GuestFsfreezeMount *mount;
char const *mtab = MOUNTED;
FILE *fp;
fp = setmntent(mtab, "r");
if (!fp) {
g_warning("fsfreeze: unable to read mtab");
return -1;
}
while ((ment = getmntent(fp))) {
/*
* An entry which device name doesn't start with a '/' is
* either a dummy file system or a network file system.
* Add special handling for smbfs and cifs as is done by
* coreutils as well.
*/
if ((ment->mnt_fsname[0] != '/') ||
(strcmp(ment->mnt_type, "smbfs") == 0) ||
(strcmp(ment->mnt_type, "cifs") == 0)) {
continue;
}
mount = g_malloc0(sizeof(GuestFsfreezeMount));
mount->dirname = g_strdup(ment->mnt_dir);
mount->devtype = g_strdup(ment->mnt_type);
QTAILQ_INSERT_TAIL(mounts, mount, next);
}
endmntent(fp);
return 0;
}
/*
* Return status of freeze/thaw
*/
GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
{
if (ga_is_frozen(ga_state)) {
return GUEST_FSFREEZE_STATUS_FROZEN;
}
return GUEST_FSFREEZE_STATUS_THAWED;
}
/*
* Walk list of mounted file systems in the guest, and freeze the ones which
* are real local file systems.
*/
int64_t qmp_guest_fsfreeze_freeze(Error **err)
{
int ret = 0, i = 0;
GuestFsfreezeMountList mounts;
struct GuestFsfreezeMount *mount;
int fd;
char err_msg[512];
slog("guest-fsfreeze called");
QTAILQ_INIT(&mounts);
ret = guest_fsfreeze_build_mount_list(&mounts);
if (ret < 0) {
return ret;
}
/* cannot risk guest agent blocking itself on a write in this state */
ga_set_frozen(ga_state);
QTAILQ_FOREACH(mount, &mounts, next) {
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
sprintf(err_msg, "failed to open %s, %s", mount->dirname,
strerror(errno));
error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
/* we try to cull filesytems we know won't work in advance, but other
* filesytems may not implement fsfreeze for less obvious reasons.
* these will report EOPNOTSUPP. we simply ignore these when tallying
* the number of frozen filesystems.
*
* any other error means a failure to freeze a filesystem we
* expect to be freezable, so return an error in those cases
* and return system to thawed state.
*/
ret = ioctl(fd, FIFREEZE);
if (ret == -1) {
if (errno != EOPNOTSUPP) {
sprintf(err_msg, "failed to freeze %s, %s",
mount->dirname, strerror(errno));
error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
close(fd);
goto error;
}
} else {
i++;
}
close(fd);
}
guest_fsfreeze_free_mount_list(&mounts);
return i;
error:
guest_fsfreeze_free_mount_list(&mounts);
qmp_guest_fsfreeze_thaw(NULL);
return 0;
}
/*
* Walk list of frozen file systems in the guest, and thaw them.
*/
int64_t qmp_guest_fsfreeze_thaw(Error **err)
{
int ret;
GuestFsfreezeMountList mounts;
GuestFsfreezeMount *mount;
int fd, i = 0, logged;
QTAILQ_INIT(&mounts);
ret = guest_fsfreeze_build_mount_list(&mounts);
if (ret) {
error_set(err, QERR_QGA_COMMAND_FAILED,
"failed to enumerate filesystems");
return 0;
}
QTAILQ_FOREACH(mount, &mounts, next) {
logged = false;
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
continue;
}
/* we have no way of knowing whether a filesystem was actually unfrozen
* as a result of a successful call to FITHAW, only that if an error
* was returned the filesystem was *not* unfrozen by that particular
* call.
*
* since multiple preceding FIFREEZEs require multiple calls to FITHAW
* to unfreeze, continuing issuing FITHAW until an error is returned,
* in which case either the filesystem is in an unfreezable state, or,
* more likely, it was thawed previously (and remains so afterward).
*
* also, since the most recent successful call is the one that did
* the actual unfreeze, we can use this to provide an accurate count
* of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
* may * be useful for determining whether a filesystem was unfrozen
* during the freeze/thaw phase by a process other than qemu-ga.
*/
do {
ret = ioctl(fd, FITHAW);
if (ret == 0 && !logged) {
i++;
logged = true;
}
} while (ret == 0);
close(fd);
}
ga_unset_frozen(ga_state);
guest_fsfreeze_free_mount_list(&mounts);
return i;
}
static void guest_fsfreeze_cleanup(void)
{
int64_t ret;
Error *err = NULL;
if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
ret = qmp_guest_fsfreeze_thaw(&err);
if (ret < 0 || err) {
slog("failed to clean up frozen filesystems");
}
}
}
#endif /* CONFIG_FSFREEZE */
#define LINUX_SYS_STATE_FILE "/sys/power/state"
#define SUSPEND_SUPPORTED 0
#define SUSPEND_NOT_SUPPORTED 1
static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg,
const char *sysfile_str, Error **err)
{
char *pmutils_path;
pid_t pid, rpid;
int status;
pmutils_path = g_find_program_in_path(pmutils_bin);
pid = fork();
if (!pid) {
char buf[32]; /* hopefully big enough */
ssize_t ret;
int fd;
setsid();
reopen_fd_to_null(0);
reopen_fd_to_null(1);
reopen_fd_to_null(2);
if (pmutils_path) {
execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
}
/*
* If we get here either pm-utils is not installed or execle() has
* failed. Let's try the manual method if the caller wants it.
*/
if (!sysfile_str) {
_exit(SUSPEND_NOT_SUPPORTED);
}
fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
if (fd < 0) {
_exit(SUSPEND_NOT_SUPPORTED);
}
ret = read(fd, buf, sizeof(buf)-1);
if (ret <= 0) {
_exit(SUSPEND_NOT_SUPPORTED);
}
buf[ret] = '\0';
if (strstr(buf, sysfile_str)) {
_exit(SUSPEND_SUPPORTED);
}
_exit(SUSPEND_NOT_SUPPORTED);
}
g_free(pmutils_path);
if (pid < 0) {
goto undef_err;
}
do {
rpid = waitpid(pid, &status, 0);
} while (rpid == -1 && errno == EINTR);
if (rpid == pid && WIFEXITED(status)) {
switch (WEXITSTATUS(status)) {
case SUSPEND_SUPPORTED:
return;
case SUSPEND_NOT_SUPPORTED:
error_set(err, QERR_UNSUPPORTED);
return;
default:
goto undef_err;
}
}
undef_err:
error_set(err, QERR_UNDEFINED_ERROR);
}
static void guest_suspend(const char *pmutils_bin, const char *sysfile_str,
Error **err)
{
char *pmutils_path;
pid_t rpid, pid;
int status;
pmutils_path = g_find_program_in_path(pmutils_bin);
pid = fork();
if (pid == 0) {
/* child */
int fd;
setsid();
reopen_fd_to_null(0);
reopen_fd_to_null(1);
reopen_fd_to_null(2);
if (pmutils_path) {
execle(pmutils_path, pmutils_bin, NULL, environ);
}
/*
* If we get here either pm-utils is not installed or execle() has
* failed. Let's try the manual method if the caller wants it.
*/
if (!sysfile_str) {
_exit(EXIT_FAILURE);
}
fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
if (fd < 0) {
_exit(EXIT_FAILURE);
}
if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
_exit(EXIT_FAILURE);
}
_exit(EXIT_SUCCESS);
}
g_free(pmutils_path);
if (pid < 0) {
goto exit_err;
}
do {
rpid = waitpid(pid, &status, 0);
} while (rpid == -1 && errno == EINTR);
if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) {
return;
}
exit_err:
error_set(err, QERR_UNDEFINED_ERROR);
}
void qmp_guest_suspend_disk(Error **err)
{
bios_supports_mode("pm-is-supported", "--hibernate", "disk", err);
if (error_is_set(err)) {
return;
}
guest_suspend("pm-hibernate", "disk", err);
}
void qmp_guest_suspend_ram(Error **err)
{
bios_supports_mode("pm-is-supported", "--suspend", "mem", err);
if (error_is_set(err)) {
return;
}
guest_suspend("pm-suspend", "mem", err);
}
void qmp_guest_suspend_hybrid(Error **err)
{
bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err);
if (error_is_set(err)) {
return;
}
guest_suspend("pm-suspend-hybrid", NULL, err);
}
static GuestNetworkInterfaceList *
guest_find_interface(GuestNetworkInterfaceList *head,
const char *name)
{
for (; head; head = head->next) {
if (strcmp(head->value->name, name) == 0) {
break;
}
}
return head;
}
/*
* Build information about guest interfaces
*/
GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
{
GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
struct ifaddrs *ifap, *ifa;
char err_msg[512];
if (getifaddrs(&ifap) < 0) {
snprintf(err_msg, sizeof(err_msg),
"getifaddrs failed: %s", strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
GuestNetworkInterfaceList *info;
GuestIpAddressList **address_list = NULL, *address_item = NULL;
char addr4[INET_ADDRSTRLEN];
char addr6[INET6_ADDRSTRLEN];
int sock;
struct ifreq ifr;
unsigned char *mac_addr;
void *p;
g_debug("Processing %s interface", ifa->ifa_name);
info = guest_find_interface(head, ifa->ifa_name);
if (!info) {
info = g_malloc0(sizeof(*info));
info->value = g_malloc0(sizeof(*info->value));
info->value->name = g_strdup(ifa->ifa_name);
if (!cur_item) {
head = cur_item = info;
} else {
cur_item->next = info;
cur_item = info;
}
}
if (!info->value->has_hardware_address &&
ifa->ifa_flags & SIOCGIFHWADDR) {
/* we haven't obtained HW address yet */
sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock == -1) {
snprintf(err_msg, sizeof(err_msg),
"failed to create socket: %s", strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, info->value->name, IF_NAMESIZE);
if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
snprintf(err_msg, sizeof(err_msg),
"failed to get MAC address of %s: %s",
ifa->ifa_name,
strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
if (asprintf(&info->value->hardware_address,
"%02x:%02x:%02x:%02x:%02x:%02x",
(int) mac_addr[0], (int) mac_addr[1],
(int) mac_addr[2], (int) mac_addr[3],
(int) mac_addr[4], (int) mac_addr[5]) == -1) {
snprintf(err_msg, sizeof(err_msg),
"failed to format MAC: %s", strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
info->value->has_hardware_address = true;
close(sock);
}
if (ifa->ifa_addr &&
ifa->ifa_addr->sa_family == AF_INET) {
/* interface with IPv4 address */
address_item = g_malloc0(sizeof(*address_item));
address_item->value = g_malloc0(sizeof(*address_item->value));
p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
snprintf(err_msg, sizeof(err_msg),
"inet_ntop failed : %s", strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
address_item->value->ip_address = g_strdup(addr4);
address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
if (ifa->ifa_netmask) {
/* Count the number of set bits in netmask.
* This is safe as '1' and '0' cannot be shuffled in netmask. */
p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
}
} else if (ifa->ifa_addr &&
ifa->ifa_addr->sa_family == AF_INET6) {
/* interface with IPv6 address */
address_item = g_malloc0(sizeof(*address_item));
address_item->value = g_malloc0(sizeof(*address_item->value));
p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
snprintf(err_msg, sizeof(err_msg),
"inet_ntop failed : %s", strerror(errno));
error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
goto error;
}
address_item->value->ip_address = g_strdup(addr6);
address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
if (ifa->ifa_netmask) {
/* Count the number of set bits in netmask.
* This is safe as '1' and '0' cannot be shuffled in netmask. */
p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
address_item->value->prefix =
ctpop32(((uint32_t *) p)[0]) +
ctpop32(((uint32_t *) p)[1]) +
ctpop32(((uint32_t *) p)[2]) +
ctpop32(((uint32_t *) p)[3]);
}
}
if (!address_item) {
continue;
}
address_list = &info->value->ip_addresses;
while (*address_list && (*address_list)->next) {
address_list = &(*address_list)->next;
}
if (!*address_list) {
*address_list = address_item;
} else {
(*address_list)->next = address_item;
}
info->value->has_ip_addresses = true;
}
freeifaddrs(ifap);
return head;
error:
freeifaddrs(ifap);
qapi_free_GuestNetworkInterfaceList(head);
return NULL;
}
#else /* defined(__linux__) */
void qmp_guest_suspend_disk(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
void qmp_guest_suspend_ram(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
void qmp_guest_suspend_hybrid(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
{
error_set(errp, QERR_UNSUPPORTED);
return NULL;
}
#endif
#if !defined(CONFIG_FSFREEZE)
GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
int64_t qmp_guest_fsfreeze_freeze(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
int64_t qmp_guest_fsfreeze_thaw(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
#endif
/* register init/cleanup routines for stateful command groups */
void ga_command_state_init(GAState *s, GACommandState *cs)
{
#if defined(CONFIG_FSFREEZE)
ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
#endif
ga_command_state_add(cs, guest_file_init, NULL);
}
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