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cr-service.c
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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <sched.h>
#include "version.h"
#include "crtools.h"
#include "cr_options.h"
#include "external.h"
#include "util.h"
#include "criu-log.h"
#include "cpu.h"
#include "files.h"
#include "pstree.h"
#include "cr-service.h"
#include "cr-service-const.h"
#include "page-xfer.h"
#include "net.h"
#include "mount.h"
#include "filesystems.h"
#include "cgroup.h"
#include "cgroup-props.h"
#include "action-scripts.h"
#include "sockets.h"
#include "irmap.h"
#include "kerndat.h"
#include "proc_parse.h"
#include "common/scm.h"
#include "uffd.h"
#include "setproctitle.h"
#include "cr-errno.h"
#include "namespaces.h"
unsigned int service_sk_ino = -1;
static int recv_criu_msg(int socket_fd, CriuReq **req)
{
unsigned char *buf;
int len;
len = recv(socket_fd, NULL, 0, MSG_TRUNC | MSG_PEEK);
if (len == -1) {
pr_perror("Can't read request");
return -1;
}
buf = xmalloc(len);
if (!buf)
return -ENOMEM;
len = recv(socket_fd, buf, len, MSG_TRUNC);
if (len == -1) {
pr_perror("Can't read request");
goto err;
}
if (len == 0) {
pr_info("Client exited unexpectedly\n");
errno = ECONNRESET;
goto err;
}
*req = criu_req__unpack(NULL, len, buf);
if (!*req) {
pr_perror("Failed unpacking request");
goto err;
}
xfree(buf);
return 0;
err:
xfree(buf);
return -1;
}
static int send_criu_msg_with_fd(int socket_fd, CriuResp *msg, int fd)
{
unsigned char *buf;
int len, ret;
len = criu_resp__get_packed_size(msg);
buf = xmalloc(len);
if (!buf)
return -ENOMEM;
if (criu_resp__pack(msg, buf) != len) {
pr_perror("Failed packing response");
goto err;
}
if (fd >= 0) {
ret = send_fds(socket_fd, NULL, 0, &fd, 1, buf, len);
} else
ret = write(socket_fd, buf, len);
if (ret < 0) {
pr_perror("Can't send response");
goto err;
}
xfree(buf);
return 0;
err:
xfree(buf);
return -1;
}
static int send_criu_msg(int socket_fd, CriuResp *msg)
{
return send_criu_msg_with_fd(socket_fd, msg, -1);
}
static void set_resp_err(CriuResp *resp)
{
resp->cr_errno = get_cr_errno();
resp->has_cr_errno = resp->cr_errno ? true : false;
resp->cr_errmsg = log_first_err();
}
static void send_criu_err(int sk, char *msg)
{
CriuResp resp = CRIU_RESP__INIT;
pr_perror("RPC error: %s", msg);
resp.type = CRIU_REQ_TYPE__EMPTY;
resp.success = false;
set_resp_err(&resp);
send_criu_msg(sk, &resp);
}
int send_criu_dump_resp(int socket_fd, bool success, bool restored)
{
CriuResp msg = CRIU_RESP__INIT;
CriuDumpResp resp = CRIU_DUMP_RESP__INIT;
msg.type = CRIU_REQ_TYPE__DUMP;
msg.success = success;
set_resp_err(&msg);
msg.dump = &resp;
resp.has_restored = true;
resp.restored = restored;
return send_criu_msg(socket_fd, &msg);
}
static int send_criu_pre_dump_resp(int socket_fd, bool success)
{
CriuResp msg = CRIU_RESP__INIT;
msg.type = CRIU_REQ_TYPE__PRE_DUMP;
msg.success = success;
set_resp_err(&msg);
return send_criu_msg(socket_fd, &msg);
}
int send_criu_restore_resp(int socket_fd, bool success, int pid)
{
CriuResp msg = CRIU_RESP__INIT;
CriuRestoreResp resp = CRIU_RESTORE_RESP__INIT;
msg.type = CRIU_REQ_TYPE__RESTORE;
msg.success = success;
set_resp_err(&msg);
msg.restore = &resp;
resp.pid = pid;
return send_criu_msg(socket_fd, &msg);
}
int send_criu_rpc_script(enum script_actions act, char *name, int sk, int fd)
{
int ret;
CriuResp msg = CRIU_RESP__INIT;
CriuReq *req;
CriuNotify cn = CRIU_NOTIFY__INIT;
msg.type = CRIU_REQ_TYPE__NOTIFY;
msg.success = true;
msg.notify = &cn;
cn.script = name;
switch (act) {
case ACT_SETUP_NS:
case ACT_POST_RESTORE:
/*
* FIXME pid is required only once on
* restore. Need some more sane way of
* checking this.
*/
cn.has_pid = true;
cn.pid = root_item->pid->real;
break;
default:
break;
}
ret = send_criu_msg_with_fd(sk, &msg, fd);
if (ret < 0)
return ret;
ret = recv_criu_msg(sk, &req);
if (ret < 0)
return ret;
if (req->type != CRIU_REQ_TYPE__NOTIFY || !req->notify_success) {
pr_err("RPC client reported script error\n");
return -1;
}
criu_req__free_unpacked(req, NULL);
return 0;
}
static char images_dir[PATH_MAX];
static int setup_opts_from_req(int sk, CriuOpts *req)
{
struct ucred ids;
struct stat st;
socklen_t ids_len = sizeof(struct ucred);
char images_dir_path[PATH_MAX];
char work_dir_path[PATH_MAX];
char status_fd[PATH_MAX];
bool output_changed_by_rpc_conf = false;
bool work_changed_by_rpc_conf = false;
bool imgs_changed_by_rpc_conf = false;
int i;
bool dummy = false;
if (getsockopt(sk, SOL_SOCKET, SO_PEERCRED, &ids, &ids_len)) {
pr_perror("Can't get socket options");
goto err;
}
if (fstat(sk, &st)) {
pr_perror("Can't get socket stat");
goto err;
}
BUG_ON(st.st_ino == -1);
service_sk_ino = st.st_ino;
/*
* Evaluate an additional configuration file if specified.
* This needs to happen twice, because it is needed early to detect
* things like work_dir, imgs_dir and logfile. The second parsing
* of the optional RPC configuration file happens at the end and
* overwrites all options set via RPC.
*/
if (req->config_file) {
char *tmp_output = opts.output;
char *tmp_work = opts.work_dir;
char *tmp_imgs = opts.imgs_dir;
opts.output = NULL;
opts.work_dir = NULL;
opts.imgs_dir = NULL;
rpc_cfg_file = req->config_file;
i = parse_options(0, NULL, &dummy, &dummy, PARSING_RPC_CONF);
pr_warn("parse_options returns %d\n", i);
if (i) {
xfree(tmp_output);
xfree(tmp_work);
xfree(tmp_imgs);
goto err;
}
/* If this is non-NULL, the RPC configuration file had a value, use it.*/
if (opts.output)
output_changed_by_rpc_conf = true;
/* If this is NULL, use the old value if it was set. */
if (!opts.output && tmp_output) {
opts.output = tmp_output;
tmp_output = NULL;
}
if (opts.work_dir)
work_changed_by_rpc_conf = true;
if (!opts.work_dir && tmp_work) {
opts.work_dir = tmp_work;
tmp_work = NULL;
}
if (opts.imgs_dir)
imgs_changed_by_rpc_conf = true;
/*
* As the images directory is a required RPC setting, it is not
* necessary to use the value from other configuration files.
* Either it is set in the RPC configuration file or it is set
* via RPC.
*/
xfree(tmp_output);
xfree(tmp_work);
xfree(tmp_imgs);
}
/*
* open images_dir - images_dir_fd is a required RPC parameter
*
* This assumes that if opts.imgs_dir is set we have a value
* from the configuration file parser. The test to see that
* imgs_changed_by_rpc_conf is true is used to make sure the value
* is from the RPC configuration file.
* The idea is that only the RPC configuration file is able to
* overwrite RPC settings:
* * apply_config(global_conf)
* * apply_config(user_conf)
* * apply_config(environment variable)
* * apply_rpc_options()
* * apply_config(rpc_conf)
*/
if (imgs_changed_by_rpc_conf)
strncpy(images_dir_path, opts.imgs_dir, PATH_MAX - 1);
else
sprintf(images_dir_path, "/proc/%d/fd/%d", ids.pid, req->images_dir_fd);
if (req->parent_img)
SET_CHAR_OPTS(img_parent, req->parent_img);
if (open_image_dir(images_dir_path) < 0) {
pr_perror("Can't open images directory");
goto err;
}
/* get full path to images_dir to use in process title */
if (readlink(images_dir_path, images_dir, PATH_MAX) == -1) {
pr_perror("Can't readlink %s", images_dir_path);
goto err;
}
/* chdir to work dir */
if (work_changed_by_rpc_conf)
/* Use the value from the RPC configuration file first. */
strncpy(work_dir_path, opts.work_dir, PATH_MAX - 1);
else if (req->has_work_dir_fd)
/* Use the value set via RPC. */
sprintf(work_dir_path, "/proc/%d/fd/%d", ids.pid, req->work_dir_fd);
else if (opts.work_dir)
/* Use the value from one of the other configuration files. */
strncpy(work_dir_path, opts.work_dir, PATH_MAX - 1);
else
/* Use the images directory a work directory. */
strcpy(work_dir_path, images_dir_path);
if (chdir(work_dir_path)) {
pr_perror("Can't chdir to work_dir");
goto err;
}
/* initiate log file in work dir */
if (req->log_file && !output_changed_by_rpc_conf) {
/*
* If RPC sets a log file and if there nothing from the
* RPC configuration file, use the RPC value.
*/
if (strchr(req->log_file, '/')) {
pr_perror("No subdirs are allowed in log_file name");
goto err;
}
SET_CHAR_OPTS(output, req->log_file);
} else if (!opts.output) {
SET_CHAR_OPTS(output, DEFAULT_LOG_FILENAME);
}
/* This is needed later to correctly set the log_level */
opts.log_level = req->log_level;
log_set_loglevel(req->log_level);
if (log_init(opts.output) == -1) {
pr_perror("Can't initiate log");
goto err;
}
if (req->config_file) {
pr_debug("Overwriting RPC settings with values from %s\n", req->config_file);
}
if (kerndat_init())
return 1;
if (log_keep_err()) {
pr_perror("Can't tune log");
goto err;
}
/* checking flags from client */
if (req->has_leave_running && req->leave_running)
opts.final_state = TASK_ALIVE;
if (!req->has_pid) {
req->has_pid = true;
req->pid = ids.pid;
}
if (req->has_ext_unix_sk) {
opts.ext_unix_sk = req->ext_unix_sk;
for (i = 0; i < req->n_unix_sk_ino; i++) {
if (unix_sk_id_add((unsigned int)req->unix_sk_ino[i]->inode) < 0)
goto err;
}
}
if (req->root)
SET_CHAR_OPTS(root, req->root);
if (req->has_rst_sibling) {
if (!opts.swrk_restore) {
pr_err("rst_sibling is not allowed in standalone service\n");
goto err;
}
opts.restore_sibling = req->rst_sibling;
}
if (req->has_tcp_established)
opts.tcp_established_ok = req->tcp_established;
if (req->has_tcp_skip_in_flight)
opts.tcp_skip_in_flight = req->tcp_skip_in_flight;
if (req->has_tcp_close)
opts.tcp_close = req->tcp_close;
if (req->has_weak_sysctls)
opts.weak_sysctls = req->weak_sysctls;
if (req->has_evasive_devices)
opts.evasive_devices = req->evasive_devices;
if (req->has_shell_job)
opts.shell_job = req->shell_job;
if (req->has_file_locks)
opts.handle_file_locks = req->file_locks;
if (req->has_track_mem)
opts.track_mem = req->track_mem;
if (req->has_link_remap)
opts.link_remap_ok = req->link_remap;
if (req->has_auto_dedup)
opts.auto_dedup = req->auto_dedup;
if (req->has_force_irmap)
opts.force_irmap = req->force_irmap;
if (req->n_exec_cmd > 0) {
opts.exec_cmd = xmalloc((req->n_exec_cmd + 1) * sizeof(char *));
memcpy(opts.exec_cmd, req->exec_cmd, req->n_exec_cmd * sizeof(char *));
opts.exec_cmd[req->n_exec_cmd] = NULL;
}
if (req->has_lazy_pages) {
opts.lazy_pages = req->lazy_pages;
}
if (req->ps) {
opts.port = (short)req->ps->port;
if (!opts.lazy_pages) {
opts.use_page_server = true;
if (req->ps->address)
SET_CHAR_OPTS(addr, req->ps->address);
else
opts.addr = NULL;
if (req->ps->has_fd) {
if (!opts.swrk_restore)
goto err;
opts.ps_socket = req->ps->fd;
}
}
}
if (req->notify_scripts && add_rpc_notify(sk))
goto err;
for (i = 0; i < req->n_veths; i++) {
if (veth_pair_add(req->veths[i]->if_in, req->veths[i]->if_out))
goto err;
}
for (i = 0; i < req->n_ext_mnt; i++) {
if (ext_mount_add(req->ext_mnt[i]->key, req->ext_mnt[i]->val))
goto err;
}
for (i = 0; i < req->n_join_ns; i++) {
if (join_ns_add(req->join_ns[i]->ns, req->join_ns[i]->ns_file, req->join_ns[i]->extra_opt))
goto err;
}
if (req->n_inherit_fd && !opts.swrk_restore) {
pr_err("inherit_fd is not allowed in standalone service\n");
goto err;
}
for (i = 0; i < req->n_inherit_fd; i++) {
if (inherit_fd_add(req->inherit_fd[i]->fd, req->inherit_fd[i]->key))
goto err;
}
for (i = 0; i < req->n_external; i++)
if (add_external(req->external[i]))
goto err;
for (i = 0; i < req->n_cg_root; i++) {
if (new_cg_root_add(req->cg_root[i]->ctrl,
req->cg_root[i]->path))
goto err;
}
for (i = 0; i < req->n_enable_fs; i++) {
if (!add_fsname_auto(req->enable_fs[i]))
goto err;
}
for (i = 0; i < req->n_skip_mnt; i++) {
if (!add_skip_mount(req->skip_mnt[i]))
goto err;
}
if (req->has_cpu_cap) {
opts.cpu_cap = req->cpu_cap;
opts.cpu_cap |= CPU_CAP_IMAGE;
}
/*
* FIXME: For backward compatibility we setup
* soft mode here, need to enhance to support
* other modes as well via separate option
* probably.
*/
if (req->has_manage_cgroups)
opts.manage_cgroups = req->manage_cgroups ? CG_MODE_SOFT : CG_MODE_IGNORE;
/* Override the manage_cgroup if mode is set explicitly */
if (req->has_manage_cgroups_mode) {
unsigned int mode;
switch (req->manage_cgroups_mode) {
case CRIU_CG_MODE__IGNORE:
mode = CG_MODE_IGNORE;
break;
case CRIU_CG_MODE__CG_NONE:
mode = CG_MODE_NONE;
break;
case CRIU_CG_MODE__PROPS:
mode = CG_MODE_PROPS;
break;
case CRIU_CG_MODE__SOFT:
mode = CG_MODE_SOFT;
break;
case CRIU_CG_MODE__FULL:
mode = CG_MODE_FULL;
break;
case CRIU_CG_MODE__STRICT:
mode = CG_MODE_STRICT;
break;
case CRIU_CG_MODE__DEFAULT:
mode = CG_MODE_DEFAULT;
break;
default:
goto err;
}
opts.manage_cgroups = mode;
}
if (req->freeze_cgroup)
SET_CHAR_OPTS(freeze_cgroup, req->freeze_cgroup);
if (req->has_timeout)
opts.timeout = req->timeout;
if (req->cgroup_props)
SET_CHAR_OPTS(cgroup_props, req->cgroup_props);
if (req->cgroup_props_file)
SET_CHAR_OPTS(cgroup_props_file, req->cgroup_props_file);
for (i = 0; i < req->n_cgroup_dump_controller; i++) {
if (!cgp_add_dump_controller(req->cgroup_dump_controller[i]))
goto err;
}
if (req->has_auto_ext_mnt)
opts.autodetect_ext_mounts = req->auto_ext_mnt;
if (req->has_ext_sharing)
opts.enable_external_sharing = req->ext_sharing;
if (req->has_ext_masters)
opts.enable_external_masters = req->ext_masters;
if (req->has_ghost_limit)
opts.ghost_limit = req->ghost_limit;
if (req->has_empty_ns) {
opts.empty_ns = req->empty_ns;
if (req->empty_ns & ~(CLONE_NEWNET))
goto err;
}
if (req->n_irmap_scan_paths) {
for (i = 0; i < req->n_irmap_scan_paths; i++) {
if (irmap_scan_path_add(req->irmap_scan_paths[i]))
goto err;
}
}
if (req->has_status_fd) {
sprintf(status_fd, "/proc/%d/fd/%d", ids.pid, req->status_fd);
opts.status_fd = open(status_fd, O_WRONLY);
if (opts.status_fd < 0)
goto err;
}
if (req->orphan_pts_master)
opts.orphan_pts_master = true;
/* Evaluate additional configuration file a second time to overwrite
* all RPC settings. */
if (req->config_file) {
rpc_cfg_file = req->config_file;
i = parse_options(0, NULL, &dummy, &dummy, PARSING_RPC_CONF);
if (i)
goto err;
}
log_set_loglevel(opts.log_level);
if (check_options())
goto err;
return 0;
err:
set_cr_errno(EBADRQC);
return -1;
}
static int dump_using_req(int sk, CriuOpts *req)
{
bool success = false;
bool self_dump = !req->pid;
if (setup_opts_from_req(sk, req))
goto exit;
setproctitle("dump --rpc -t %d -D %s", req->pid, images_dir);
/*
* FIXME -- cr_dump_tasks() may return code from custom
* scripts, that can be positive. However, right now we
* don't have ability to push scripts via RPC, so positive
* ret values are impossible here.
*/
if (cr_dump_tasks(req->pid))
goto exit;
success = true;
exit:
if (req->leave_running || !self_dump || !success) {
if (send_criu_dump_resp(sk, success, false) == -1) {
pr_perror("Can't send response");
success = false;
}
}
return success ? 0 : 1;
}
static int restore_using_req(int sk, CriuOpts *req)
{
bool success = false;
/*
* We can't restore processes under arbitrary task yet.
* Thus for now we force the detached restore under the
* cr service task.
*/
opts.restore_detach = true;
if (setup_opts_from_req(sk, req))
goto exit;
setproctitle("restore --rpc -D %s", images_dir);
if (cr_restore_tasks())
goto exit;
success = true;
exit:
if (send_criu_restore_resp(sk, success,
root_item ? root_item->pid->real : -1) == -1) {
pr_perror("Can't send response");
success = false;
}
if (success && opts.exec_cmd) {
int logfd;
logfd = log_get_fd();
if (dup2(logfd, STDOUT_FILENO) == -1 || dup2(logfd, STDERR_FILENO) == -1) {
pr_perror("Failed to redirect stdout and stderr to the logfile");
return 1;
}
close_pid_proc();
close(sk);
execvp(opts.exec_cmd[0], opts.exec_cmd);
pr_perror("Failed to exec cmd %s", opts.exec_cmd[0]);
success = false;
}
return success ? 0 : 1;
}
static int check(int sk, CriuOpts *req)
{
int pid, status;
CriuResp resp = CRIU_RESP__INIT;
resp.type = CRIU_REQ_TYPE__CHECK;
pid = fork();
if (pid < 0) {
pr_perror("Can't fork");
goto out;
}
if (pid == 0) {
setproctitle("check --rpc");
if (setup_opts_from_req(sk, req))
exit(1);
exit(!!cr_check());
}
if (waitpid(pid, &status, 0) != pid) {
pr_perror("Unable to wait %d", pid);
goto out;
}
if (status)
goto out;
resp.success = true;
out:
return send_criu_msg(sk, &resp);
}
static int pre_dump_using_req(int sk, CriuOpts *req)
{
int pid, status;
bool success = false;
pid = fork();
if (pid < 0) {
pr_perror("Can't fork");
goto out;
}
if (pid == 0) {
int ret = 1;
if (setup_opts_from_req(sk, req))
goto cout;
setproctitle("pre-dump --rpc -t %d -D %s", req->pid, images_dir);
if (cr_pre_dump_tasks(req->pid))
goto cout;
ret = 0;
cout:
exit(ret);
}
if (waitpid(pid, &status, 0) != pid) {
pr_perror("Unable to wait %d", pid);
goto out;
}
if (status != 0)
goto out;
success = true;
out:
if (send_criu_pre_dump_resp(sk, success) == -1) {
pr_perror("Can't send pre-dump resp");
success = false;
}
return success ? 0 : -1;
}
static int pre_dump_loop(int sk, CriuReq *msg)
{
int ret;
do {
ret = pre_dump_using_req(sk, msg->opts);
if (ret < 0)
return ret;
criu_req__free_unpacked(msg, NULL);
if (recv_criu_msg(sk, &msg) == -1) {
pr_perror("Can't recv request");
return -1;
}
} while (msg->type == CRIU_REQ_TYPE__PRE_DUMP);
if (msg->type != CRIU_REQ_TYPE__DUMP) {
send_criu_err(sk, "Bad req seq");
return -1;
}
return dump_using_req(sk, msg->opts);
}
static int start_page_server_req(int sk, CriuOpts *req, bool daemon_mode)
{
int ret = -1, pid, start_pipe[2];
ssize_t count;
bool success = false;
CriuResp resp = CRIU_RESP__INIT;
CriuPageServerInfo ps = CRIU_PAGE_SERVER_INFO__INIT;
struct ps_info info;
if (pipe(start_pipe)) {
pr_perror("No start pipe");
goto out;
}
pid = fork();
if (pid == 0) {
close(start_pipe[0]);
if (setup_opts_from_req(sk, req))
goto out_ch;
setproctitle("page-server --rpc --address %s --port %hu", opts.addr, opts.port);
pr_debug("Starting page server\n");
pid = cr_page_server(daemon_mode, false, start_pipe[1]);
if (pid < 0)
goto out_ch;
if (daemon_mode) {
info.pid = pid;
info.port = opts.port;
count = write(start_pipe[1], &info, sizeof(info));
if (count != sizeof(info))
goto out_ch;
}
ret = 0;
out_ch:
if (daemon_mode && ret < 0 && pid > 0)
kill(pid, SIGKILL);
close(start_pipe[1]);
exit(ret);
}
close(start_pipe[1]);
if (daemon_mode) {
if (waitpid(pid, &ret, 0) != pid) {
pr_perror("Unable to wait %d", pid);
goto out;
}
if (WIFEXITED(ret)) {
if (WEXITSTATUS(ret)) {
pr_err("Child exited with an error\n");
goto out;
}
} else {
pr_err("Child wasn't terminated normally\n");
goto out;
}
}
count = read(start_pipe[0], &info, sizeof(info));
close(start_pipe[0]);
if (count != sizeof(info))
goto out;
ps.pid = info.pid;
ps.has_port = true;
ps.port = info.port;
success = true;
ps.has_pid = true;
resp.ps = &ps;
pr_debug("Page server started\n");
out:
resp.type = CRIU_REQ_TYPE__PAGE_SERVER;
resp.success = success;
return send_criu_msg(sk, &resp);
}
static int chk_keepopen_req(CriuReq *msg)
{
if (!msg->keep_open)
return 0;
/*
* Service may (well, it will) leave some
* resources leaked after processing e.g.
* dump or restore requests. Before we audit
* the code for this, let's first enable
* mreq RPCs for those requests we know do
* good work
*/
if (msg->type == CRIU_REQ_TYPE__PAGE_SERVER)
/* This just fork()-s so no leaks */
return 0;
if (msg->type == CRIU_REQ_TYPE__PAGE_SERVER_CHLD)
/* This just fork()-s so no leaks */
return 0;
else if (msg->type == CRIU_REQ_TYPE__CPUINFO_DUMP ||
msg->type == CRIU_REQ_TYPE__CPUINFO_CHECK)
return 0;
else if (msg->type == CRIU_REQ_TYPE__FEATURE_CHECK)
return 0;
else if (msg->type == CRIU_REQ_TYPE__VERSION)
return 0;
return -1;
}
/*
* Return the version information, depending on the information
* available in version.h
*/
static int handle_version(int sk, CriuReq * msg)
{
CriuResp resp = CRIU_RESP__INIT;
CriuVersion version = CRIU_VERSION__INIT;
/* This assumes we will always have a major and minor version */
version.major = CRIU_VERSION_MAJOR;
version.minor = CRIU_VERSION_MINOR;
if (strcmp(CRIU_GITID, "0")) {
version.gitid = CRIU_GITID;
}
#ifdef CRIU_VERSION_SUBLEVEL
version.has_sublevel = 1;
version.sublevel = CRIU_VERSION_SUBLEVEL;
#endif
#ifdef CRIU_VERSION_EXTRA
version.has_extra = 1;
version.extra = CRIU_VERSION_EXTRA;
#endif
#ifdef CRIU_VERSION_NAME
/* This is not actually exported in version.h */
version.name = CRIU_VERSION_NAME;
#endif
resp.type = msg->type;
resp.success = true;
resp.version = &version;
return send_criu_msg(sk, &resp);
}
/*
* Generic function to handle CRIU_REQ_TYPE__FEATURE_CHECK.
*
* The function will have resp.success = true for most cases
* and the actual result will be in resp.features.
*
* For each feature which has been requested in msg->features
* the corresponding parameter will be set in resp.features.
*/
static int handle_feature_check(int sk, CriuReq * msg)