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util: add an unique ID of the current criu run

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This ID will be used to generate resource ID-s that can conflicts with
other CRIU processes.

Signed-off-by: Andrei Vagin <avagin@gmail.com>
This commit is contained in:
Andrei Vagin 2022-02-12 17:17:27 -08:00
parent b13b95e522
commit 408a7d82d6
3 changed files with 19 additions and 0 deletions
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2
criu/crtools.c
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@ -254,6 +254,8 @@ int main(int argc, char *argv[], char *envp[])
return 1;
}
util_init();
if (log_init(opts.output))
return 1;

6
criu/include/util.h
View file

@ -393,4 +393,10 @@ static inline void cleanup_freep(void *p)
extern int run_command(char *buf, size_t buf_size, int (*child_fn)(void *), void *args);
/*
* criu_run_id is a unique value of the current run. It can be used to
* generate resource ID-s to avoid conflicts with other CRIU processes.
*/
extern uint64_t criu_run_id;
extern void util_init(void);
#endif /* __CR_UTIL_H__ */

11
criu/util.c
View file

@ -27,6 +27,7 @@
#include <netinet/tcp.h>
#include <sched.h>
#include <ftw.h>
#include <time.h>
#include "linux/mount.h"
@ -1804,3 +1805,13 @@ int run_command(char *buf, size_t buf_size, int (*child_fn)(void *), void *args)
return fret;
}
uint64_t criu_run_id;
void util_init()
{
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC, &tp);
criu_run_id = ((uint64_t)getpid() << 32) + tp.tv_sec + tp.tv_nsec;
}