mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-26 19:49:12 +00:00
4bf96b6680
According to the file lock information from the image, we recall flock or fcntl with proper parameters, so we can rehold the file locks as we were dumped. We only support flock and posix file locks so far. Changelog since the initial version: a. Use prepare_file_locks instead of restore function directly. b. Fix some bugs. Originally-signed-off-by: Zheng Gu <cengku.gu@huawei.com> Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
#ifndef __FILE_LOCK_H__
|
|
#define __FILE_LOCK_H__
|
|
|
|
#include "crtools.h"
|
|
#include "protobuf.h"
|
|
#include "../protobuf/file-lock.pb-c.h"
|
|
|
|
#define FL_POSIX 1
|
|
#define FL_FLOCK 2
|
|
|
|
/* for posix fcntl() and lockf() */
|
|
#ifndef F_RDLCK
|
|
#define F_RDLCK 0
|
|
#define F_WRLCK 1
|
|
#define F_UNLCK 2
|
|
#endif
|
|
|
|
/* operations for bsd flock(), also used by the kernel implementation */
|
|
#define LOCK_SH 1 /* shared lock */
|
|
#define LOCK_EX 2 /* exclusive lock */
|
|
#define LOCK_NB 4 /* or'd with one of the above to prevent
|
|
blocking */
|
|
#define LOCK_UN 8 /* remove lock */
|
|
|
|
#define LOCK_MAND 32 /* This is a mandatory flock ... */
|
|
#define LOCK_READ 64 /* which allows concurrent read operations */
|
|
#define LOCK_WRITE 128 /* which allows concurrent write operations */
|
|
#define LOCK_RW 192 /* which allows concurrent read & write ops */
|
|
|
|
struct file_lock {
|
|
long long fl_id;
|
|
char fl_flag[10];
|
|
char fl_type[15];
|
|
char fl_option[10];
|
|
|
|
pid_t fl_owner;
|
|
int maj, min;
|
|
unsigned long i_no;
|
|
long long start;
|
|
char end[32];
|
|
|
|
struct list_head list; /* list of all file locks */
|
|
};
|
|
|
|
extern struct list_head file_lock_list;
|
|
|
|
extern struct file_lock *alloc_file_lock(void);
|
|
extern void free_file_locks(void);
|
|
extern int dump_one_file_lock(FileLockEntry *fle, const struct cr_fdset *fdset);
|
|
|
|
extern int prepare_file_locks(int pid);
|
|
|
|
#endif /* __FILE_LOCK_H__ */
|