* Chardev fix from Marc-André * config.status tweak from David * Header file tweaks from Markus, myself and Veronia (Outreachy candidate) * get_ticks_per_sec() removal from Rutuja (Outreachy candidate) * Coverity fix from myself * PKE implementation from myself, based on rth's XSAVE support -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJW9ErPAAoJEL/70l94x66DJfEH/A/QkMpAhrgNdyVsahzsGrzE wx5gHFIc1nBYxyr62w4apUb5jPB7zaXu0LA7EAWDeAe0pyP8hZzLT9kJyOEDsuJu zwKN2QeLSNMtPbnbKN0I/YQ2za2xX1V5ruhSeOJoVslUI214hgnAURaGshhQNzuZ 2CluDT9KgL5cQifAnKs5kJrwhIYShYNQB+1eDC/7wk28dd/EH+sPALIoF+rqrSmt Zu4Mdqd+9Ns+oKOjA6br9ULq/Hzg0aDfY82J+XLVVqfF3PXQe8rTDmuMf/7jTn+M Un7ZOcei9oZF2/9vfAfKQpDCcgD9HvOUSbgqV/ubmkPPmN/LNJzeKj0fBhrRN+Y= =K12D -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging * Log filtering from Alex and Peter * Chardev fix from Marc-André * config.status tweak from David * Header file tweaks from Markus, myself and Veronia (Outreachy candidate) * get_ticks_per_sec() removal from Rutuja (Outreachy candidate) * Coverity fix from myself * PKE implementation from myself, based on rth's XSAVE support # gpg: Signature made Thu 24 Mar 2016 20:15:11 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" * remotes/bonzini/tags/for-upstream: (28 commits) target-i386: implement PKE for TCG config.status: Pass extra parameters char: translate from QIOChannel error to errno exec: fix error handling in file_ram_alloc cputlb: modernise the debug support qemu-log: support simple pid substitution for logs target-arm: dfilter support for in_asm qemu-log: dfilter-ise exec, out_asm, op and opt_op qemu-log: new option -dfilter to limit output qemu-log: Improve the "exec" TB execution logging qemu-log: Avoid function call for disabled qemu_log_mask logging qemu-log: correct help text for -d cpu tcg: pass down TranslationBlock to tcg_code_gen util: move declarations out of qemu-common.h Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND hw: explicitly include qemu-common.h and cpu.h include/crypto: Include qapi-types.h or qemu/bswap.h instead of qemu-common.h isa: Move DMA_transfer_handler from qemu-common.h to hw/isa/isa.h Move ParallelIOArg from qemu-common.h to sysemu/char.h Move QEMU_ALIGN_*() from qemu-common.h to qemu/osdep.h ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Conflicts: scripts/clean-includes
1395 lines
40 KiB
C
1395 lines
40 KiB
C
/*
|
|
* QEMU Guest Agent
|
|
*
|
|
* Copyright IBM Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Adam Litke <aglitke@linux.vnet.ibm.com>
|
|
* Michael Roth <mdroth@linux.vnet.ibm.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 "qemu/osdep.h"
|
|
#include <glib.h>
|
|
#include <getopt.h>
|
|
#include <glib/gstdio.h>
|
|
#ifndef _WIN32
|
|
#include <syslog.h>
|
|
#include <sys/wait.h>
|
|
#endif
|
|
#include "qapi/qmp/json-streamer.h"
|
|
#include "qapi/qmp/json-parser.h"
|
|
#include "qapi/qmp/qint.h"
|
|
#include "qapi/qmp/qjson.h"
|
|
#include "qga/guest-agent-core.h"
|
|
#include "qemu/module.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "qapi/qmp/dispatch.h"
|
|
#include "qga/channel.h"
|
|
#include "qemu/bswap.h"
|
|
#include "qemu/help_option.h"
|
|
#ifdef _WIN32
|
|
#include "qga/service-win32.h"
|
|
#include "qga/vss-win32.h"
|
|
#endif
|
|
#ifdef __linux__
|
|
#include <linux/fs.h>
|
|
#ifdef FIFREEZE
|
|
#define CONFIG_FSFREEZE
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef _WIN32
|
|
#define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
|
|
#define QGA_STATE_RELATIVE_DIR "run"
|
|
#define QGA_SERIAL_PATH_DEFAULT "/dev/ttyS0"
|
|
#else
|
|
#define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
|
|
#define QGA_STATE_RELATIVE_DIR "qemu-ga"
|
|
#define QGA_SERIAL_PATH_DEFAULT "COM1"
|
|
#endif
|
|
#ifdef CONFIG_FSFREEZE
|
|
#define QGA_FSFREEZE_HOOK_DEFAULT CONFIG_QEMU_CONFDIR "/fsfreeze-hook"
|
|
#endif
|
|
#define QGA_SENTINEL_BYTE 0xFF
|
|
#define QGA_CONF_DEFAULT CONFIG_QEMU_CONFDIR G_DIR_SEPARATOR_S "qemu-ga.conf"
|
|
|
|
static struct {
|
|
const char *state_dir;
|
|
const char *pidfile;
|
|
} dfl_pathnames;
|
|
|
|
typedef struct GAPersistentState {
|
|
#define QGA_PSTATE_DEFAULT_FD_COUNTER 1000
|
|
int64_t fd_counter;
|
|
} GAPersistentState;
|
|
|
|
struct GAState {
|
|
JSONMessageParser parser;
|
|
GMainLoop *main_loop;
|
|
GAChannel *channel;
|
|
bool virtio; /* fastpath to check for virtio to deal with poll() quirks */
|
|
GACommandState *command_state;
|
|
GLogLevelFlags log_level;
|
|
FILE *log_file;
|
|
bool logging_enabled;
|
|
#ifdef _WIN32
|
|
GAService service;
|
|
#endif
|
|
bool delimit_response;
|
|
bool frozen;
|
|
GList *blacklist;
|
|
char *state_filepath_isfrozen;
|
|
struct {
|
|
const char *log_filepath;
|
|
const char *pid_filepath;
|
|
} deferred_options;
|
|
#ifdef CONFIG_FSFREEZE
|
|
const char *fsfreeze_hook;
|
|
#endif
|
|
gchar *pstate_filepath;
|
|
GAPersistentState pstate;
|
|
};
|
|
|
|
struct GAState *ga_state;
|
|
|
|
/* commands that are safe to issue while filesystems are frozen */
|
|
static const char *ga_freeze_whitelist[] = {
|
|
"guest-ping",
|
|
"guest-info",
|
|
"guest-sync",
|
|
"guest-sync-delimited",
|
|
"guest-fsfreeze-status",
|
|
"guest-fsfreeze-thaw",
|
|
NULL
|
|
};
|
|
|
|
#ifdef _WIN32
|
|
DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
|
|
LPVOID ctx);
|
|
VOID WINAPI service_main(DWORD argc, TCHAR *argv[]);
|
|
#endif
|
|
|
|
static void
|
|
init_dfl_pathnames(void)
|
|
{
|
|
g_assert(dfl_pathnames.state_dir == NULL);
|
|
g_assert(dfl_pathnames.pidfile == NULL);
|
|
dfl_pathnames.state_dir = qemu_get_local_state_pathname(
|
|
QGA_STATE_RELATIVE_DIR);
|
|
dfl_pathnames.pidfile = qemu_get_local_state_pathname(
|
|
QGA_STATE_RELATIVE_DIR G_DIR_SEPARATOR_S "qemu-ga.pid");
|
|
}
|
|
|
|
static void quit_handler(int sig)
|
|
{
|
|
/* if we're frozen, don't exit unless we're absolutely forced to,
|
|
* because it's basically impossible for graceful exit to complete
|
|
* unless all log/pid files are on unfreezable filesystems. there's
|
|
* also a very likely chance killing the agent before unfreezing
|
|
* the filesystems is a mistake (or will be viewed as one later).
|
|
*/
|
|
if (ga_is_frozen(ga_state)) {
|
|
return;
|
|
}
|
|
g_debug("received signal num %d, quitting", sig);
|
|
|
|
if (g_main_loop_is_running(ga_state->main_loop)) {
|
|
g_main_loop_quit(ga_state->main_loop);
|
|
}
|
|
}
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|
|
|
#ifndef _WIN32
|
|
static gboolean register_signal_handlers(void)
|
|
{
|
|
struct sigaction sigact;
|
|
int ret;
|
|
|
|
memset(&sigact, 0, sizeof(struct sigaction));
|
|
sigact.sa_handler = quit_handler;
|
|
|
|
ret = sigaction(SIGINT, &sigact, NULL);
|
|
if (ret == -1) {
|
|
g_error("error configuring signal handler: %s", strerror(errno));
|
|
}
|
|
ret = sigaction(SIGTERM, &sigact, NULL);
|
|
if (ret == -1) {
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|
g_error("error configuring signal handler: %s", strerror(errno));
|
|
}
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|
sigact.sa_handler = SIG_IGN;
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|
if (sigaction(SIGPIPE, &sigact, NULL) != 0) {
|
|
g_error("error configuring SIGPIPE signal handler: %s",
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|
strerror(errno));
|
|
}
|
|
|
|
return true;
|
|
}
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|
|
|
/* TODO: use this in place of all post-fork() fclose(std*) callers */
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|
void reopen_fd_to_null(int fd)
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|
{
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|
int nullfd;
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nullfd = open("/dev/null", O_RDWR);
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|
if (nullfd < 0) {
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return;
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|
}
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dup2(nullfd, fd);
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if (nullfd != fd) {
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|
close(nullfd);
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}
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}
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#endif
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|
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static void usage(const char *cmd)
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|
{
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printf(
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"Usage: %s [-m <method> -p <path>] [<options>]\n"
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"QEMU Guest Agent %s\n"
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"\n"
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" -m, --method transport method: one of unix-listen, virtio-serial, or\n"
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" isa-serial (virtio-serial is the default)\n"
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" -p, --path device/socket path (the default for virtio-serial is:\n"
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" %s,\n"
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" the default for isa-serial is:\n"
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" %s)\n"
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" -l, --logfile set logfile path, logs to stderr by default\n"
|
|
" -f, --pidfile specify pidfile (default is %s)\n"
|
|
#ifdef CONFIG_FSFREEZE
|
|
" -F, --fsfreeze-hook\n"
|
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" enable fsfreeze hook. Accepts an optional argument that\n"
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" specifies script to run on freeze/thaw. Script will be\n"
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" called with 'freeze'/'thaw' arguments accordingly.\n"
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" (default is %s)\n"
|
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" If using -F with an argument, do not follow -F with a\n"
|
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" space.\n"
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" (for example: -F/var/run/fsfreezehook.sh)\n"
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#endif
|
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" -t, --statedir specify dir to store state information (absolute paths\n"
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" only, default is %s)\n"
|
|
" -v, --verbose log extra debugging information\n"
|
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" -V, --version print version information and exit\n"
|
|
" -d, --daemonize become a daemon\n"
|
|
#ifdef _WIN32
|
|
" -s, --service service commands: install, uninstall, vss-install, vss-uninstall\n"
|
|
#endif
|
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" -b, --blacklist comma-separated list of RPCs to disable (no spaces, \"?\"\n"
|
|
" to list available RPCs)\n"
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" -D, --dump-conf dump a qemu-ga config file based on current config\n"
|
|
" options / command-line parameters to stdout\n"
|
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" -h, --help display this help and exit\n"
|
|
"\n"
|
|
"Report bugs to <mdroth@linux.vnet.ibm.com>\n"
|
|
, cmd, QEMU_VERSION, QGA_VIRTIO_PATH_DEFAULT, QGA_SERIAL_PATH_DEFAULT,
|
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dfl_pathnames.pidfile,
|
|
#ifdef CONFIG_FSFREEZE
|
|
QGA_FSFREEZE_HOOK_DEFAULT,
|
|
#endif
|
|
dfl_pathnames.state_dir);
|
|
}
|
|
|
|
static const char *ga_log_level_str(GLogLevelFlags level)
|
|
{
|
|
switch (level & G_LOG_LEVEL_MASK) {
|
|
case G_LOG_LEVEL_ERROR:
|
|
return "error";
|
|
case G_LOG_LEVEL_CRITICAL:
|
|
return "critical";
|
|
case G_LOG_LEVEL_WARNING:
|
|
return "warning";
|
|
case G_LOG_LEVEL_MESSAGE:
|
|
return "message";
|
|
case G_LOG_LEVEL_INFO:
|
|
return "info";
|
|
case G_LOG_LEVEL_DEBUG:
|
|
return "debug";
|
|
default:
|
|
return "user";
|
|
}
|
|
}
|
|
|
|
bool ga_logging_enabled(GAState *s)
|
|
{
|
|
return s->logging_enabled;
|
|
}
|
|
|
|
void ga_disable_logging(GAState *s)
|
|
{
|
|
s->logging_enabled = false;
|
|
}
|
|
|
|
void ga_enable_logging(GAState *s)
|
|
{
|
|
s->logging_enabled = true;
|
|
}
|
|
|
|
static void ga_log(const gchar *domain, GLogLevelFlags level,
|
|
const gchar *msg, gpointer opaque)
|
|
{
|
|
GAState *s = opaque;
|
|
GTimeVal time;
|
|
const char *level_str = ga_log_level_str(level);
|
|
|
|
if (!ga_logging_enabled(s)) {
|
|
return;
|
|
}
|
|
|
|
level &= G_LOG_LEVEL_MASK;
|
|
#ifndef _WIN32
|
|
if (g_strcmp0(domain, "syslog") == 0) {
|
|
syslog(LOG_INFO, "%s: %s", level_str, msg);
|
|
} else if (level & s->log_level) {
|
|
#else
|
|
if (level & s->log_level) {
|
|
#endif
|
|
g_get_current_time(&time);
|
|
fprintf(s->log_file,
|
|
"%lu.%lu: %s: %s\n", time.tv_sec, time.tv_usec, level_str, msg);
|
|
fflush(s->log_file);
|
|
}
|
|
}
|
|
|
|
void ga_set_response_delimited(GAState *s)
|
|
{
|
|
s->delimit_response = true;
|
|
}
|
|
|
|
static FILE *ga_open_logfile(const char *logfile)
|
|
{
|
|
FILE *f;
|
|
|
|
f = fopen(logfile, "a");
|
|
if (!f) {
|
|
return NULL;
|
|
}
|
|
|
|
qemu_set_cloexec(fileno(f));
|
|
return f;
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
static bool ga_open_pidfile(const char *pidfile)
|
|
{
|
|
int pidfd;
|
|
char pidstr[32];
|
|
|
|
pidfd = qemu_open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
|
|
if (pidfd == -1 || lockf(pidfd, F_TLOCK, 0)) {
|
|
g_critical("Cannot lock pid file, %s", strerror(errno));
|
|
if (pidfd != -1) {
|
|
close(pidfd);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (ftruncate(pidfd, 0)) {
|
|
g_critical("Failed to truncate pid file");
|
|
goto fail;
|
|
}
|
|
snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
|
|
if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
|
|
g_critical("Failed to write pid file");
|
|
goto fail;
|
|
}
|
|
|
|
/* keep pidfile open & locked forever */
|
|
return true;
|
|
|
|
fail:
|
|
unlink(pidfile);
|
|
close(pidfd);
|
|
return false;
|
|
}
|
|
#else /* _WIN32 */
|
|
static bool ga_open_pidfile(const char *pidfile)
|
|
{
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
static gint ga_strcmp(gconstpointer str1, gconstpointer str2)
|
|
{
|
|
return strcmp(str1, str2);
|
|
}
|
|
|
|
/* disable commands that aren't safe for fsfreeze */
|
|
static void ga_disable_non_whitelisted(QmpCommand *cmd, void *opaque)
|
|
{
|
|
bool whitelisted = false;
|
|
int i = 0;
|
|
const char *name = qmp_command_name(cmd);
|
|
|
|
while (ga_freeze_whitelist[i] != NULL) {
|
|
if (strcmp(name, ga_freeze_whitelist[i]) == 0) {
|
|
whitelisted = true;
|
|
}
|
|
i++;
|
|
}
|
|
if (!whitelisted) {
|
|
g_debug("disabling command: %s", name);
|
|
qmp_disable_command(name);
|
|
}
|
|
}
|
|
|
|
/* [re-]enable all commands, except those explicitly blacklisted by user */
|
|
static void ga_enable_non_blacklisted(QmpCommand *cmd, void *opaque)
|
|
{
|
|
GList *blacklist = opaque;
|
|
const char *name = qmp_command_name(cmd);
|
|
|
|
if (g_list_find_custom(blacklist, name, ga_strcmp) == NULL &&
|
|
!qmp_command_is_enabled(cmd)) {
|
|
g_debug("enabling command: %s", name);
|
|
qmp_enable_command(name);
|
|
}
|
|
}
|
|
|
|
static bool ga_create_file(const char *path)
|
|
{
|
|
int fd = open(path, O_CREAT | O_WRONLY, S_IWUSR | S_IRUSR);
|
|
if (fd == -1) {
|
|
g_warning("unable to open/create file %s: %s", path, strerror(errno));
|
|
return false;
|
|
}
|
|
close(fd);
|
|
return true;
|
|
}
|
|
|
|
static bool ga_delete_file(const char *path)
|
|
{
|
|
int ret = unlink(path);
|
|
if (ret == -1) {
|
|
g_warning("unable to delete file: %s: %s", path, strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ga_is_frozen(GAState *s)
|
|
{
|
|
return s->frozen;
|
|
}
|
|
|
|
void ga_set_frozen(GAState *s)
|
|
{
|
|
if (ga_is_frozen(s)) {
|
|
return;
|
|
}
|
|
/* disable all non-whitelisted (for frozen state) commands */
|
|
qmp_for_each_command(ga_disable_non_whitelisted, NULL);
|
|
g_warning("disabling logging due to filesystem freeze");
|
|
ga_disable_logging(s);
|
|
s->frozen = true;
|
|
if (!ga_create_file(s->state_filepath_isfrozen)) {
|
|
g_warning("unable to create %s, fsfreeze may not function properly",
|
|
s->state_filepath_isfrozen);
|
|
}
|
|
}
|
|
|
|
void ga_unset_frozen(GAState *s)
|
|
{
|
|
if (!ga_is_frozen(s)) {
|
|
return;
|
|
}
|
|
|
|
/* if we delayed creation/opening of pid/log files due to being
|
|
* in a frozen state at start up, do it now
|
|
*/
|
|
if (s->deferred_options.log_filepath) {
|
|
s->log_file = ga_open_logfile(s->deferred_options.log_filepath);
|
|
if (!s->log_file) {
|
|
s->log_file = stderr;
|
|
}
|
|
s->deferred_options.log_filepath = NULL;
|
|
}
|
|
ga_enable_logging(s);
|
|
g_warning("logging re-enabled due to filesystem unfreeze");
|
|
if (s->deferred_options.pid_filepath) {
|
|
if (!ga_open_pidfile(s->deferred_options.pid_filepath)) {
|
|
g_warning("failed to create/open pid file");
|
|
}
|
|
s->deferred_options.pid_filepath = NULL;
|
|
}
|
|
|
|
/* enable all disabled, non-blacklisted commands */
|
|
qmp_for_each_command(ga_enable_non_blacklisted, s->blacklist);
|
|
s->frozen = false;
|
|
if (!ga_delete_file(s->state_filepath_isfrozen)) {
|
|
g_warning("unable to delete %s, fsfreeze may not function properly",
|
|
s->state_filepath_isfrozen);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_FSFREEZE
|
|
const char *ga_fsfreeze_hook(GAState *s)
|
|
{
|
|
return s->fsfreeze_hook;
|
|
}
|
|
#endif
|
|
|
|
static void become_daemon(const char *pidfile)
|
|
{
|
|
#ifndef _WIN32
|
|
pid_t pid, sid;
|
|
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (pid > 0) {
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
if (pidfile) {
|
|
if (!ga_open_pidfile(pidfile)) {
|
|
g_critical("failed to create pidfile");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
umask(S_IRWXG | S_IRWXO);
|
|
sid = setsid();
|
|
if (sid < 0) {
|
|
goto fail;
|
|
}
|
|
if ((chdir("/")) < 0) {
|
|
goto fail;
|
|
}
|
|
|
|
reopen_fd_to_null(STDIN_FILENO);
|
|
reopen_fd_to_null(STDOUT_FILENO);
|
|
reopen_fd_to_null(STDERR_FILENO);
|
|
return;
|
|
|
|
fail:
|
|
if (pidfile) {
|
|
unlink(pidfile);
|
|
}
|
|
g_critical("failed to daemonize");
|
|
exit(EXIT_FAILURE);
|
|
#endif
|
|
}
|
|
|
|
static int send_response(GAState *s, QObject *payload)
|
|
{
|
|
const char *buf;
|
|
QString *payload_qstr, *response_qstr;
|
|
GIOStatus status;
|
|
|
|
g_assert(payload && s->channel);
|
|
|
|
payload_qstr = qobject_to_json(payload);
|
|
if (!payload_qstr) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (s->delimit_response) {
|
|
s->delimit_response = false;
|
|
response_qstr = qstring_new();
|
|
qstring_append_chr(response_qstr, QGA_SENTINEL_BYTE);
|
|
qstring_append(response_qstr, qstring_get_str(payload_qstr));
|
|
QDECREF(payload_qstr);
|
|
} else {
|
|
response_qstr = payload_qstr;
|
|
}
|
|
|
|
qstring_append_chr(response_qstr, '\n');
|
|
buf = qstring_get_str(response_qstr);
|
|
status = ga_channel_write_all(s->channel, buf, strlen(buf));
|
|
QDECREF(response_qstr);
|
|
if (status != G_IO_STATUS_NORMAL) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void process_command(GAState *s, QDict *req)
|
|
{
|
|
QObject *rsp = NULL;
|
|
int ret;
|
|
|
|
g_assert(req);
|
|
g_debug("processing command");
|
|
rsp = qmp_dispatch(QOBJECT(req));
|
|
if (rsp) {
|
|
ret = send_response(s, rsp);
|
|
if (ret) {
|
|
g_warning("error sending response: %s", strerror(ret));
|
|
}
|
|
qobject_decref(rsp);
|
|
}
|
|
}
|
|
|
|
/* handle requests/control events coming in over the channel */
|
|
static void process_event(JSONMessageParser *parser, GQueue *tokens)
|
|
{
|
|
GAState *s = container_of(parser, GAState, parser);
|
|
QDict *qdict;
|
|
Error *err = NULL;
|
|
int ret;
|
|
|
|
g_assert(s && parser);
|
|
|
|
g_debug("process_event: called");
|
|
qdict = qobject_to_qdict(json_parser_parse_err(tokens, NULL, &err));
|
|
if (err || !qdict) {
|
|
QDECREF(qdict);
|
|
qdict = qdict_new();
|
|
if (!err) {
|
|
g_warning("failed to parse event: unknown error");
|
|
error_setg(&err, QERR_JSON_PARSING);
|
|
} else {
|
|
g_warning("failed to parse event: %s", error_get_pretty(err));
|
|
}
|
|
qdict_put_obj(qdict, "error", qmp_build_error_object(err));
|
|
error_free(err);
|
|
}
|
|
|
|
/* handle host->guest commands */
|
|
if (qdict_haskey(qdict, "execute")) {
|
|
process_command(s, qdict);
|
|
} else {
|
|
if (!qdict_haskey(qdict, "error")) {
|
|
QDECREF(qdict);
|
|
qdict = qdict_new();
|
|
g_warning("unrecognized payload format");
|
|
error_setg(&err, QERR_UNSUPPORTED);
|
|
qdict_put_obj(qdict, "error", qmp_build_error_object(err));
|
|
error_free(err);
|
|
}
|
|
ret = send_response(s, QOBJECT(qdict));
|
|
if (ret < 0) {
|
|
g_warning("error sending error response: %s", strerror(-ret));
|
|
}
|
|
}
|
|
|
|
QDECREF(qdict);
|
|
}
|
|
|
|
/* false return signals GAChannel to close the current client connection */
|
|
static gboolean channel_event_cb(GIOCondition condition, gpointer data)
|
|
{
|
|
GAState *s = data;
|
|
gchar buf[QGA_READ_COUNT_DEFAULT+1];
|
|
gsize count;
|
|
GIOStatus status = ga_channel_read(s->channel, buf, QGA_READ_COUNT_DEFAULT, &count);
|
|
switch (status) {
|
|
case G_IO_STATUS_ERROR:
|
|
g_warning("error reading channel");
|
|
return false;
|
|
case G_IO_STATUS_NORMAL:
|
|
buf[count] = 0;
|
|
g_debug("read data, count: %d, data: %s", (int)count, buf);
|
|
json_message_parser_feed(&s->parser, (char *)buf, (int)count);
|
|
break;
|
|
case G_IO_STATUS_EOF:
|
|
g_debug("received EOF");
|
|
if (!s->virtio) {
|
|
return false;
|
|
}
|
|
/* fall through */
|
|
case G_IO_STATUS_AGAIN:
|
|
/* virtio causes us to spin here when no process is attached to
|
|
* host-side chardev. sleep a bit to mitigate this
|
|
*/
|
|
if (s->virtio) {
|
|
usleep(100*1000);
|
|
}
|
|
return true;
|
|
default:
|
|
g_warning("unknown channel read status, closing");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static gboolean channel_init(GAState *s, const gchar *method, const gchar *path)
|
|
{
|
|
GAChannelMethod channel_method;
|
|
|
|
if (strcmp(method, "virtio-serial") == 0) {
|
|
s->virtio = true; /* virtio requires special handling in some cases */
|
|
channel_method = GA_CHANNEL_VIRTIO_SERIAL;
|
|
} else if (strcmp(method, "isa-serial") == 0) {
|
|
channel_method = GA_CHANNEL_ISA_SERIAL;
|
|
} else if (strcmp(method, "unix-listen") == 0) {
|
|
channel_method = GA_CHANNEL_UNIX_LISTEN;
|
|
} else {
|
|
g_critical("unsupported channel method/type: %s", method);
|
|
return false;
|
|
}
|
|
|
|
s->channel = ga_channel_new(channel_method, path, channel_event_cb, s);
|
|
if (!s->channel) {
|
|
g_critical("failed to create guest agent channel");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
|
|
LPVOID ctx)
|
|
{
|
|
DWORD ret = NO_ERROR;
|
|
GAService *service = &ga_state->service;
|
|
|
|
switch (ctrl)
|
|
{
|
|
case SERVICE_CONTROL_STOP:
|
|
case SERVICE_CONTROL_SHUTDOWN:
|
|
quit_handler(SIGTERM);
|
|
service->status.dwCurrentState = SERVICE_STOP_PENDING;
|
|
SetServiceStatus(service->status_handle, &service->status);
|
|
break;
|
|
|
|
default:
|
|
ret = ERROR_CALL_NOT_IMPLEMENTED;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
VOID WINAPI service_main(DWORD argc, TCHAR *argv[])
|
|
{
|
|
GAService *service = &ga_state->service;
|
|
|
|
service->status_handle = RegisterServiceCtrlHandlerEx(QGA_SERVICE_NAME,
|
|
service_ctrl_handler, NULL);
|
|
|
|
if (service->status_handle == 0) {
|
|
g_critical("Failed to register extended requests function!\n");
|
|
return;
|
|
}
|
|
|
|
service->status.dwServiceType = SERVICE_WIN32;
|
|
service->status.dwCurrentState = SERVICE_RUNNING;
|
|
service->status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
|
|
service->status.dwWin32ExitCode = NO_ERROR;
|
|
service->status.dwServiceSpecificExitCode = NO_ERROR;
|
|
service->status.dwCheckPoint = 0;
|
|
service->status.dwWaitHint = 0;
|
|
SetServiceStatus(service->status_handle, &service->status);
|
|
|
|
g_main_loop_run(ga_state->main_loop);
|
|
|
|
service->status.dwCurrentState = SERVICE_STOPPED;
|
|
SetServiceStatus(service->status_handle, &service->status);
|
|
}
|
|
#endif
|
|
|
|
static void set_persistent_state_defaults(GAPersistentState *pstate)
|
|
{
|
|
g_assert(pstate);
|
|
pstate->fd_counter = QGA_PSTATE_DEFAULT_FD_COUNTER;
|
|
}
|
|
|
|
static void persistent_state_from_keyfile(GAPersistentState *pstate,
|
|
GKeyFile *keyfile)
|
|
{
|
|
g_assert(pstate);
|
|
g_assert(keyfile);
|
|
/* if any fields are missing, either because the file was tampered with
|
|
* by agents of chaos, or because the field wasn't present at the time the
|
|
* file was created, the best we can ever do is start over with the default
|
|
* values. so load them now, and ignore any errors in accessing key-value
|
|
* pairs
|
|
*/
|
|
set_persistent_state_defaults(pstate);
|
|
|
|
if (g_key_file_has_key(keyfile, "global", "fd_counter", NULL)) {
|
|
pstate->fd_counter =
|
|
g_key_file_get_integer(keyfile, "global", "fd_counter", NULL);
|
|
}
|
|
}
|
|
|
|
static void persistent_state_to_keyfile(const GAPersistentState *pstate,
|
|
GKeyFile *keyfile)
|
|
{
|
|
g_assert(pstate);
|
|
g_assert(keyfile);
|
|
|
|
g_key_file_set_integer(keyfile, "global", "fd_counter", pstate->fd_counter);
|
|
}
|
|
|
|
static gboolean write_persistent_state(const GAPersistentState *pstate,
|
|
const gchar *path)
|
|
{
|
|
GKeyFile *keyfile = g_key_file_new();
|
|
GError *gerr = NULL;
|
|
gboolean ret = true;
|
|
gchar *data = NULL;
|
|
gsize data_len;
|
|
|
|
g_assert(pstate);
|
|
|
|
persistent_state_to_keyfile(pstate, keyfile);
|
|
data = g_key_file_to_data(keyfile, &data_len, &gerr);
|
|
if (gerr) {
|
|
g_critical("failed to convert persistent state to string: %s",
|
|
gerr->message);
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
g_file_set_contents(path, data, data_len, &gerr);
|
|
if (gerr) {
|
|
g_critical("failed to write persistent state to %s: %s",
|
|
path, gerr->message);
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
if (gerr) {
|
|
g_error_free(gerr);
|
|
}
|
|
if (keyfile) {
|
|
g_key_file_free(keyfile);
|
|
}
|
|
g_free(data);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean read_persistent_state(GAPersistentState *pstate,
|
|
const gchar *path, gboolean frozen)
|
|
{
|
|
GKeyFile *keyfile = NULL;
|
|
GError *gerr = NULL;
|
|
struct stat st;
|
|
gboolean ret = true;
|
|
|
|
g_assert(pstate);
|
|
|
|
if (stat(path, &st) == -1) {
|
|
/* it's okay if state file doesn't exist, but any other error
|
|
* indicates a permissions issue or some other misconfiguration
|
|
* that we likely won't be able to recover from.
|
|
*/
|
|
if (errno != ENOENT) {
|
|
g_critical("unable to access state file at path %s: %s",
|
|
path, strerror(errno));
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
/* file doesn't exist. initialize state to default values and
|
|
* attempt to save now. (we could wait till later when we have
|
|
* modified state we need to commit, but if there's a problem,
|
|
* such as a missing parent directory, we want to catch it now)
|
|
*
|
|
* there is a potential scenario where someone either managed to
|
|
* update the agent from a version that didn't use a key store
|
|
* while qemu-ga thought the filesystem was frozen, or
|
|
* deleted the key store prior to issuing a fsfreeze, prior
|
|
* to restarting the agent. in this case we go ahead and defer
|
|
* initial creation till we actually have modified state to
|
|
* write, otherwise fail to recover from freeze.
|
|
*/
|
|
set_persistent_state_defaults(pstate);
|
|
if (!frozen) {
|
|
ret = write_persistent_state(pstate, path);
|
|
if (!ret) {
|
|
g_critical("unable to create state file at path %s", path);
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
}
|
|
ret = true;
|
|
goto out;
|
|
}
|
|
|
|
keyfile = g_key_file_new();
|
|
g_key_file_load_from_file(keyfile, path, 0, &gerr);
|
|
if (gerr) {
|
|
g_critical("error loading persistent state from path: %s, %s",
|
|
path, gerr->message);
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
persistent_state_from_keyfile(pstate, keyfile);
|
|
|
|
out:
|
|
if (keyfile) {
|
|
g_key_file_free(keyfile);
|
|
}
|
|
if (gerr) {
|
|
g_error_free(gerr);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int64_t ga_get_fd_handle(GAState *s, Error **errp)
|
|
{
|
|
int64_t handle;
|
|
|
|
g_assert(s->pstate_filepath);
|
|
/* we blacklist commands and avoid operations that potentially require
|
|
* writing to disk when we're in a frozen state. this includes opening
|
|
* new files, so we should never get here in that situation
|
|
*/
|
|
g_assert(!ga_is_frozen(s));
|
|
|
|
handle = s->pstate.fd_counter++;
|
|
|
|
/* This should never happen on a reasonable timeframe, as guest-file-open
|
|
* would have to be issued 2^63 times */
|
|
if (s->pstate.fd_counter == INT64_MAX) {
|
|
abort();
|
|
}
|
|
|
|
if (!write_persistent_state(&s->pstate, s->pstate_filepath)) {
|
|
error_setg(errp, "failed to commit persistent state to disk");
|
|
return -1;
|
|
}
|
|
|
|
return handle;
|
|
}
|
|
|
|
static void ga_print_cmd(QmpCommand *cmd, void *opaque)
|
|
{
|
|
printf("%s\n", qmp_command_name(cmd));
|
|
}
|
|
|
|
static GList *split_list(const gchar *str, const gchar *delim)
|
|
{
|
|
GList *list = NULL;
|
|
int i;
|
|
gchar **strv;
|
|
|
|
strv = g_strsplit(str, delim, -1);
|
|
for (i = 0; strv[i]; i++) {
|
|
list = g_list_prepend(list, strv[i]);
|
|
}
|
|
g_free(strv);
|
|
|
|
return list;
|
|
}
|
|
|
|
typedef struct GAConfig {
|
|
char *channel_path;
|
|
char *method;
|
|
char *log_filepath;
|
|
char *pid_filepath;
|
|
#ifdef CONFIG_FSFREEZE
|
|
char *fsfreeze_hook;
|
|
#endif
|
|
char *state_dir;
|
|
#ifdef _WIN32
|
|
const char *service;
|
|
#endif
|
|
gchar *bliststr; /* blacklist may point to this string */
|
|
GList *blacklist;
|
|
int daemonize;
|
|
GLogLevelFlags log_level;
|
|
int dumpconf;
|
|
} GAConfig;
|
|
|
|
static void config_load(GAConfig *config)
|
|
{
|
|
GError *gerr = NULL;
|
|
GKeyFile *keyfile;
|
|
const char *conf = g_getenv("QGA_CONF") ?: QGA_CONF_DEFAULT;
|
|
|
|
/* read system config */
|
|
keyfile = g_key_file_new();
|
|
if (!g_key_file_load_from_file(keyfile, conf, 0, &gerr)) {
|
|
goto end;
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "daemon", NULL)) {
|
|
config->daemonize =
|
|
g_key_file_get_boolean(keyfile, "general", "daemon", &gerr);
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "method", NULL)) {
|
|
config->method =
|
|
g_key_file_get_string(keyfile, "general", "method", &gerr);
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "path", NULL)) {
|
|
config->channel_path =
|
|
g_key_file_get_string(keyfile, "general", "path", &gerr);
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "logfile", NULL)) {
|
|
config->log_filepath =
|
|
g_key_file_get_string(keyfile, "general", "logfile", &gerr);
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "pidfile", NULL)) {
|
|
config->pid_filepath =
|
|
g_key_file_get_string(keyfile, "general", "pidfile", &gerr);
|
|
}
|
|
#ifdef CONFIG_FSFREEZE
|
|
if (g_key_file_has_key(keyfile, "general", "fsfreeze-hook", NULL)) {
|
|
config->fsfreeze_hook =
|
|
g_key_file_get_string(keyfile,
|
|
"general", "fsfreeze-hook", &gerr);
|
|
}
|
|
#endif
|
|
if (g_key_file_has_key(keyfile, "general", "statedir", NULL)) {
|
|
config->state_dir =
|
|
g_key_file_get_string(keyfile, "general", "statedir", &gerr);
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "verbose", NULL) &&
|
|
g_key_file_get_boolean(keyfile, "general", "verbose", &gerr)) {
|
|
/* enable all log levels */
|
|
config->log_level = G_LOG_LEVEL_MASK;
|
|
}
|
|
if (g_key_file_has_key(keyfile, "general", "blacklist", NULL)) {
|
|
config->bliststr =
|
|
g_key_file_get_string(keyfile, "general", "blacklist", &gerr);
|
|
config->blacklist = g_list_concat(config->blacklist,
|
|
split_list(config->bliststr, ","));
|
|
}
|
|
|
|
end:
|
|
g_key_file_free(keyfile);
|
|
if (gerr &&
|
|
!(gerr->domain == G_FILE_ERROR && gerr->code == G_FILE_ERROR_NOENT)) {
|
|
g_critical("error loading configuration from path: %s, %s",
|
|
QGA_CONF_DEFAULT, gerr->message);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
g_clear_error(&gerr);
|
|
}
|
|
|
|
static gchar *list_join(GList *list, const gchar separator)
|
|
{
|
|
GString *str = g_string_new("");
|
|
|
|
while (list) {
|
|
str = g_string_append(str, (gchar *)list->data);
|
|
list = g_list_next(list);
|
|
if (list) {
|
|
str = g_string_append_c(str, separator);
|
|
}
|
|
}
|
|
|
|
return g_string_free(str, FALSE);
|
|
}
|
|
|
|
static void config_dump(GAConfig *config)
|
|
{
|
|
GError *error = NULL;
|
|
GKeyFile *keyfile;
|
|
gchar *tmp;
|
|
|
|
keyfile = g_key_file_new();
|
|
g_assert(keyfile);
|
|
|
|
g_key_file_set_boolean(keyfile, "general", "daemon", config->daemonize);
|
|
g_key_file_set_string(keyfile, "general", "method", config->method);
|
|
g_key_file_set_string(keyfile, "general", "path", config->channel_path);
|
|
if (config->log_filepath) {
|
|
g_key_file_set_string(keyfile, "general", "logfile",
|
|
config->log_filepath);
|
|
}
|
|
g_key_file_set_string(keyfile, "general", "pidfile", config->pid_filepath);
|
|
#ifdef CONFIG_FSFREEZE
|
|
if (config->fsfreeze_hook) {
|
|
g_key_file_set_string(keyfile, "general", "fsfreeze-hook",
|
|
config->fsfreeze_hook);
|
|
}
|
|
#endif
|
|
g_key_file_set_string(keyfile, "general", "statedir", config->state_dir);
|
|
g_key_file_set_boolean(keyfile, "general", "verbose",
|
|
config->log_level == G_LOG_LEVEL_MASK);
|
|
tmp = list_join(config->blacklist, ',');
|
|
g_key_file_set_string(keyfile, "general", "blacklist", tmp);
|
|
g_free(tmp);
|
|
|
|
tmp = g_key_file_to_data(keyfile, NULL, &error);
|
|
printf("%s", tmp);
|
|
|
|
g_free(tmp);
|
|
g_key_file_free(keyfile);
|
|
}
|
|
|
|
static void config_parse(GAConfig *config, int argc, char **argv)
|
|
{
|
|
const char *sopt = "hVvdm:p:l:f:F::b:s:t:D";
|
|
int opt_ind = 0, ch;
|
|
const struct option lopt[] = {
|
|
{ "help", 0, NULL, 'h' },
|
|
{ "version", 0, NULL, 'V' },
|
|
{ "dump-conf", 0, NULL, 'D' },
|
|
{ "logfile", 1, NULL, 'l' },
|
|
{ "pidfile", 1, NULL, 'f' },
|
|
#ifdef CONFIG_FSFREEZE
|
|
{ "fsfreeze-hook", 2, NULL, 'F' },
|
|
#endif
|
|
{ "verbose", 0, NULL, 'v' },
|
|
{ "method", 1, NULL, 'm' },
|
|
{ "path", 1, NULL, 'p' },
|
|
{ "daemonize", 0, NULL, 'd' },
|
|
{ "blacklist", 1, NULL, 'b' },
|
|
#ifdef _WIN32
|
|
{ "service", 1, NULL, 's' },
|
|
#endif
|
|
{ "statedir", 1, NULL, 't' },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
|
|
switch (ch) {
|
|
case 'm':
|
|
g_free(config->method);
|
|
config->method = g_strdup(optarg);
|
|
break;
|
|
case 'p':
|
|
g_free(config->channel_path);
|
|
config->channel_path = g_strdup(optarg);
|
|
break;
|
|
case 'l':
|
|
g_free(config->log_filepath);
|
|
config->log_filepath = g_strdup(optarg);
|
|
break;
|
|
case 'f':
|
|
g_free(config->pid_filepath);
|
|
config->pid_filepath = g_strdup(optarg);
|
|
break;
|
|
#ifdef CONFIG_FSFREEZE
|
|
case 'F':
|
|
g_free(config->fsfreeze_hook);
|
|
config->fsfreeze_hook = g_strdup(optarg ?: QGA_FSFREEZE_HOOK_DEFAULT);
|
|
break;
|
|
#endif
|
|
case 't':
|
|
g_free(config->state_dir);
|
|
config->state_dir = g_strdup(optarg);
|
|
break;
|
|
case 'v':
|
|
/* enable all log levels */
|
|
config->log_level = G_LOG_LEVEL_MASK;
|
|
break;
|
|
case 'V':
|
|
printf("QEMU Guest Agent %s\n", QEMU_VERSION);
|
|
exit(EXIT_SUCCESS);
|
|
case 'd':
|
|
config->daemonize = 1;
|
|
break;
|
|
case 'D':
|
|
config->dumpconf = 1;
|
|
break;
|
|
case 'b': {
|
|
if (is_help_option(optarg)) {
|
|
qmp_for_each_command(ga_print_cmd, NULL);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
config->blacklist = g_list_concat(config->blacklist,
|
|
split_list(optarg, ","));
|
|
break;
|
|
}
|
|
#ifdef _WIN32
|
|
case 's':
|
|
config->service = optarg;
|
|
if (strcmp(config->service, "install") == 0) {
|
|
if (ga_install_vss_provider()) {
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (ga_install_service(config->channel_path,
|
|
config->log_filepath, config->state_dir)) {
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
exit(EXIT_SUCCESS);
|
|
} else if (strcmp(config->service, "uninstall") == 0) {
|
|
ga_uninstall_vss_provider();
|
|
exit(ga_uninstall_service());
|
|
} else if (strcmp(config->service, "vss-install") == 0) {
|
|
if (ga_install_vss_provider()) {
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
exit(EXIT_SUCCESS);
|
|
} else if (strcmp(config->service, "vss-uninstall") == 0) {
|
|
ga_uninstall_vss_provider();
|
|
exit(EXIT_SUCCESS);
|
|
} else {
|
|
printf("Unknown service command.\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
break;
|
|
#endif
|
|
case 'h':
|
|
usage(argv[0]);
|
|
exit(EXIT_SUCCESS);
|
|
case '?':
|
|
g_print("Unknown option, try '%s --help' for more information.\n",
|
|
argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void config_free(GAConfig *config)
|
|
{
|
|
g_free(config->method);
|
|
g_free(config->log_filepath);
|
|
g_free(config->pid_filepath);
|
|
g_free(config->state_dir);
|
|
g_free(config->channel_path);
|
|
g_free(config->bliststr);
|
|
#ifdef CONFIG_FSFREEZE
|
|
g_free(config->fsfreeze_hook);
|
|
#endif
|
|
g_free(config);
|
|
}
|
|
|
|
static bool check_is_frozen(GAState *s)
|
|
{
|
|
#ifndef _WIN32
|
|
/* check if a previous instance of qemu-ga exited with filesystems' state
|
|
* marked as frozen. this could be a stale value (a non-qemu-ga process
|
|
* or reboot may have since unfrozen them), but better to require an
|
|
* uneeded unfreeze than to risk hanging on start-up
|
|
*/
|
|
struct stat st;
|
|
if (stat(s->state_filepath_isfrozen, &st) == -1) {
|
|
/* it's okay if the file doesn't exist, but if we can't access for
|
|
* some other reason, such as permissions, there's a configuration
|
|
* that needs to be addressed. so just bail now before we get into
|
|
* more trouble later
|
|
*/
|
|
if (errno != ENOENT) {
|
|
g_critical("unable to access state file at path %s: %s",
|
|
s->state_filepath_isfrozen, strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
} else {
|
|
g_warning("previous instance appears to have exited with frozen"
|
|
" filesystems. deferring logging/pidfile creation and"
|
|
" disabling non-fsfreeze-safe commands until"
|
|
" guest-fsfreeze-thaw is issued, or filesystems are"
|
|
" manually unfrozen and the file %s is removed",
|
|
s->state_filepath_isfrozen);
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
static int run_agent(GAState *s, GAConfig *config)
|
|
{
|
|
ga_state = s;
|
|
|
|
g_log_set_default_handler(ga_log, s);
|
|
g_log_set_fatal_mask(NULL, G_LOG_LEVEL_ERROR);
|
|
ga_enable_logging(s);
|
|
|
|
#ifdef _WIN32
|
|
/* On win32 the state directory is application specific (be it the default
|
|
* or a user override). We got past the command line parsing; let's create
|
|
* the directory (with any intermediate directories). If we run into an
|
|
* error later on, we won't try to clean up the directory, it is considered
|
|
* persistent.
|
|
*/
|
|
if (g_mkdir_with_parents(config->state_dir, S_IRWXU) == -1) {
|
|
g_critical("unable to create (an ancestor of) the state directory"
|
|
" '%s': %s", config->state_dir, strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
if (ga_is_frozen(s)) {
|
|
if (config->daemonize) {
|
|
/* delay opening/locking of pidfile till filesystems are unfrozen */
|
|
s->deferred_options.pid_filepath = config->pid_filepath;
|
|
become_daemon(NULL);
|
|
}
|
|
if (config->log_filepath) {
|
|
/* delay opening the log file till filesystems are unfrozen */
|
|
s->deferred_options.log_filepath = config->log_filepath;
|
|
}
|
|
ga_disable_logging(s);
|
|
qmp_for_each_command(ga_disable_non_whitelisted, NULL);
|
|
} else {
|
|
if (config->daemonize) {
|
|
become_daemon(config->pid_filepath);
|
|
}
|
|
if (config->log_filepath) {
|
|
FILE *log_file = ga_open_logfile(config->log_filepath);
|
|
if (!log_file) {
|
|
g_critical("unable to open specified log file: %s",
|
|
strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
s->log_file = log_file;
|
|
}
|
|
}
|
|
|
|
/* load persistent state from disk */
|
|
if (!read_persistent_state(&s->pstate,
|
|
s->pstate_filepath,
|
|
ga_is_frozen(s))) {
|
|
g_critical("failed to load persistent state");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
config->blacklist = ga_command_blacklist_init(config->blacklist);
|
|
if (config->blacklist) {
|
|
GList *l = config->blacklist;
|
|
s->blacklist = config->blacklist;
|
|
do {
|
|
g_debug("disabling command: %s", (char *)l->data);
|
|
qmp_disable_command(l->data);
|
|
l = g_list_next(l);
|
|
} while (l);
|
|
}
|
|
s->command_state = ga_command_state_new();
|
|
ga_command_state_init(s, s->command_state);
|
|
ga_command_state_init_all(s->command_state);
|
|
json_message_parser_init(&s->parser, process_event);
|
|
ga_state = s;
|
|
#ifndef _WIN32
|
|
if (!register_signal_handlers()) {
|
|
g_critical("failed to register signal handlers");
|
|
return EXIT_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
s->main_loop = g_main_loop_new(NULL, false);
|
|
if (!channel_init(ga_state, config->method, config->channel_path)) {
|
|
g_critical("failed to initialize guest agent channel");
|
|
return EXIT_FAILURE;
|
|
}
|
|
#ifndef _WIN32
|
|
g_main_loop_run(ga_state->main_loop);
|
|
#else
|
|
if (config->daemonize) {
|
|
SERVICE_TABLE_ENTRY service_table[] = {
|
|
{ (char *)QGA_SERVICE_NAME, service_main }, { NULL, NULL } };
|
|
StartServiceCtrlDispatcher(service_table);
|
|
} else {
|
|
g_main_loop_run(ga_state->main_loop);
|
|
}
|
|
#endif
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
static void free_blacklist_entry(gpointer entry, gpointer unused)
|
|
{
|
|
g_free(entry);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int ret = EXIT_SUCCESS;
|
|
GAState *s = g_new0(GAState, 1);
|
|
GAConfig *config = g_new0(GAConfig, 1);
|
|
|
|
config->log_level = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL;
|
|
|
|
module_call_init(MODULE_INIT_QAPI);
|
|
|
|
init_dfl_pathnames();
|
|
config_load(config);
|
|
config_parse(config, argc, argv);
|
|
|
|
if (config->pid_filepath == NULL) {
|
|
config->pid_filepath = g_strdup(dfl_pathnames.pidfile);
|
|
}
|
|
|
|
if (config->state_dir == NULL) {
|
|
config->state_dir = g_strdup(dfl_pathnames.state_dir);
|
|
}
|
|
|
|
if (config->method == NULL) {
|
|
config->method = g_strdup("virtio-serial");
|
|
}
|
|
|
|
if (config->channel_path == NULL) {
|
|
if (strcmp(config->method, "virtio-serial") == 0) {
|
|
/* try the default path for the virtio-serial port */
|
|
config->channel_path = g_strdup(QGA_VIRTIO_PATH_DEFAULT);
|
|
} else if (strcmp(config->method, "isa-serial") == 0) {
|
|
/* try the default path for the serial port - COM1 */
|
|
config->channel_path = g_strdup(QGA_SERIAL_PATH_DEFAULT);
|
|
} else {
|
|
g_critical("must specify a path for this channel");
|
|
ret = EXIT_FAILURE;
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
s->log_level = config->log_level;
|
|
s->log_file = stderr;
|
|
#ifdef CONFIG_FSFREEZE
|
|
s->fsfreeze_hook = config->fsfreeze_hook;
|
|
#endif
|
|
s->pstate_filepath = g_strdup_printf("%s/qga.state", config->state_dir);
|
|
s->state_filepath_isfrozen = g_strdup_printf("%s/qga.state.isfrozen",
|
|
config->state_dir);
|
|
s->frozen = check_is_frozen(s);
|
|
|
|
if (config->dumpconf) {
|
|
config_dump(config);
|
|
goto end;
|
|
}
|
|
|
|
ret = run_agent(s, config);
|
|
|
|
end:
|
|
if (s->command_state) {
|
|
ga_command_state_cleanup_all(s->command_state);
|
|
}
|
|
if (s->channel) {
|
|
ga_channel_free(s->channel);
|
|
}
|
|
g_list_foreach(config->blacklist, free_blacklist_entry, NULL);
|
|
g_free(s->pstate_filepath);
|
|
g_free(s->state_filepath_isfrozen);
|
|
|
|
if (config->daemonize) {
|
|
unlink(config->pid_filepath);
|
|
}
|
|
|
|
config_free(config);
|
|
|
|
return ret;
|
|
}
|