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criu: dump and restore notify_thread_id of posix timer

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When sigev_notify_thread_id is not set, get_pid will return a NULL
pointer and do_timer_create will return -EINVAL in kernel. So criu
will failed to create posix timer:

(09.806760) pie: 41301: Error (criu/pie/restorer.c:1998): Can't restore posix timers -22
(09.806824) pie: 41301: Error (criu/pie/restorer.c:2133): Restorer fail 41301
(09.891880) Error (criu/cr-restore.c:2596): Restoring FAILED.

Signed-off-by: Liu Chao <liuchao173@huawei.com>
This commit is contained in:
Liu Chao 2021-06-29 02:02:51 +00:00 committed by Andrei Vagin
parent 6be9345fb1
commit 80079fbb0d
6 changed files with 10 additions and 0 deletions
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1
criu/cr-restore.c
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@ -2798,6 +2798,7 @@ static inline int decode_posix_timer(PosixTimerEntry *pte,
pt->spt.si_signo = pte->si_signo;
pt->spt.it_sigev_notify = pte->it_sigev_notify;
pt->spt.sival_ptr = decode_pointer(pte->sival_ptr);
pt->spt.notify_thread_id = pte->notify_thread_id;
pt->overrun = pte->overrun;
return 0;

1
criu/include/posix-timer.h
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@ -8,6 +8,7 @@ struct str_posix_timer {
int clock_id;
int si_signo;
int it_sigev_notify;
int notify_thread_id;
void * sival_ptr;
};

1
criu/parasite-syscall.c
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@ -325,6 +325,7 @@ static void encode_posix_timer(struct posix_timer *v,
pte->clock_id = vp->spt.clock_id;
pte->si_signo = vp->spt.si_signo;
pte->it_sigev_notify = vp->spt.it_sigev_notify;
pte->notify_thread_id = vp->spt.notify_thread_id;
pte->sival_ptr = encode_pointer(vp->spt.sival_ptr);
pte->overrun = v->overrun;

5
criu/pie/restorer.c
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@ -1069,6 +1069,11 @@ static int create_posix_timers(struct task_restore_args *args)
for (i = 0; i < args->posix_timers_n; i++) {
sev.sigev_notify = args->posix_timers[i].spt.it_sigev_notify;
sev.sigev_signo = args->posix_timers[i].spt.si_signo;
#ifdef __GLIBC__
sev._sigev_un._tid = args->posix_timers[i].spt.notify_thread_id;
#else
sev.sigev_notify_thread_id = args->posix_timers[i].spt.notify_thread_id;
#endif
sev.sigev_value.sival_ptr = args->posix_timers[i].spt.sival_ptr;
while (1) {

1
criu/proc_parse.c
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@ -2342,6 +2342,7 @@ int parse_posix_timers(pid_t pid, struct proc_posix_timers_stat *args)
if ( tidpid[0] == 't') {
timer->spt.it_sigev_notify = SIGEV_THREAD_ID;
timer->spt.notify_thread_id = pid_t;
} else {
switch (sigpid[0]) {
case 's' :

1
images/timer.proto
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@ -21,6 +21,7 @@ message posix_timer_entry {
required uint64 insec = 8;
required uint64 vsec = 9;
required uint64 vnsec = 10;
optional int32 notify_thread_id= 11;
}
message task_timers_entry {