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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/timerfd.h>
#include <sys/ioctl.h>
#include "protobuf.h"
#include "images/timerfd.pb-c.h"
#include "fdinfo.h"
#include "rst-malloc.h"
#include "cr_options.h"
#include "restorer.h"
#include "timerfd.h"
#include "pstree.h"
#include "files.h"
#include "imgset.h"
#include "util.h"
#include "log.h"
#include "common/bug.h"
#undef LOG_PREFIX
#define LOG_PREFIX "timerfd: "
struct timerfd_dump_arg {
u32 id;
const struct fd_parms *p;
};
struct timerfd_info {
TimerfdEntry *tfe;
struct file_desc d;
int t_fd;
struct list_head rlist;
};
static LIST_HEAD(rst_timerfds);
int check_timerfd(void)
{
int fd, ret = -1;
fd = timerfd_create(CLOCK_MONOTONIC, 0);
if (fd < 0) {
pr_perror("timerfd_create failed");
return -1;
} else {
ret = ioctl(fd, TFD_IOC_SET_TICKS, NULL);
if (ret < 0) {
if (errno != EFAULT)
pr_perror("No timerfd support for c/r");
else
ret = 0;
}
}
close(fd);
return ret;
}
int is_timerfd_link(char *link)
{
return is_anon_link_type(link, "[timerfd]");
}
static int dump_one_timerfd(int lfd, u32 id, const struct fd_parms *p)
{
TimerfdEntry tfe = TIMERFD_ENTRY__INIT;
FileEntry fe = FILE_ENTRY__INIT;
if (parse_fdinfo(lfd, FD_TYPES__TIMERFD, &tfe))
return -1;
tfe.id = id;
tfe.flags = p->flags;
tfe.fown = (FownEntry *)&p->fown;
pr_info("Dumping id %#x clockid %d it_value(%llu, %llu) it_interval(%llu, %llu)\n", tfe.id, tfe.clockid,
(unsigned long long)tfe.vsec, (unsigned long long)tfe.vnsec, (unsigned long long)tfe.isec,
(unsigned long long)tfe.insec);
fe.type = FD_TYPES__TIMERFD;
fe.id = tfe.id;
fe.tfd = &tfe;
return pb_write_one(img_from_set(glob_imgset, CR_FD_FILES), &fe, PB_FILE);
}
const struct fdtype_ops timerfd_dump_ops = {
.type = FD_TYPES__TIMERFD,
.dump = dump_one_timerfd,
};
int prepare_timerfds(struct task_restore_args *ta)
{
struct timerfd_info *ti;
struct restore_timerfd *t;
ta->timerfd = (struct restore_timerfd *)rst_mem_align_cpos(RM_PRIVATE);
ta->timerfd_n = 0;
list_for_each_entry(ti, &rst_timerfds, rlist) {
TimerfdEntry *tfe = ti->tfe;
t = rst_mem_alloc(sizeof(*t), RM_PRIVATE);
if (!t)
return -1;
t->id = tfe->id;
t->fd = ti->t_fd;
t->clockid = tfe->clockid;
t->ticks = (unsigned long)tfe->ticks;
t->settime_flags = tfe->settime_flags;
t->val.it_interval.tv_sec = (time_t)tfe->isec;
t->val.it_interval.tv_nsec = (long)tfe->insec;
t->val.it_value.tv_sec = (time_t)tfe->vsec;
t->val.it_value.tv_nsec = (long)tfe->vnsec;
ta->timerfd_n++;
}
return 0;
}
static int timerfd_open(struct file_desc *d, int *new_fd)
{
struct timerfd_info *info;
TimerfdEntry *tfe;
int tmp = -1;
info = container_of(d, struct timerfd_info, d);
tfe = info->tfe;
pr_info("Creating timerfd id %#x clockid %d settime_flags %x ticks %llu "
"it_value(%llu, %llu) it_interval(%llu, %llu)\n",
tfe->id, tfe->clockid, tfe->settime_flags, (unsigned long long)tfe->ticks,
(unsigned long long)tfe->vsec, (unsigned long long)tfe->vnsec, (unsigned long long)tfe->isec,
(unsigned long long)tfe->insec);
tmp = timerfd_create(tfe->clockid, 0);
if (tmp < 0) {
pr_perror("Can't create for %#x", tfe->id);
return -1;
}
if (rst_file_params(tmp, tfe->fown, tfe->flags)) {
pr_perror("Can't restore params for %#x", tfe->id);
goto err_close;
}
info->t_fd = file_master(d)->fe->fd;
list_add_tail(&info->rlist, &rst_timerfds);
*new_fd = tmp;
return 0;
err_close:
close_safe(&tmp);
return -1;
}
static struct file_desc_ops timerfd_desc_ops = {
.type = FD_TYPES__TIMERFD,
.open = timerfd_open,
};
static int collect_one_timerfd(void *o, ProtobufCMessage *msg, struct cr_img *i)
{
struct timerfd_info *info = o;
info->tfe = pb_msg(msg, TimerfdEntry);
if (verify_timerfd(info->tfe)) {
pr_err("Verification failed for %#x\n", info->tfe->id);
return -1;
}
info->t_fd = -1;
return file_desc_add(&info->d, info->tfe->id, &timerfd_desc_ops);
}
struct collect_image_info timerfd_cinfo = {
.fd_type = CR_FD_TIMERFD,
.pb_type = PB_TIMERFD,
.priv_size = sizeof(struct timerfd_info),
.collect = collect_one_timerfd,
};
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