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#ifndef __FILE_LOCK_H__
#define __FILE_LOCK_H__
#include "common/list.h"
#include "protobuf.h"
#include "images/file-lock.pb-c.h"
#define FL_UNKNOWN -1
#define FL_POSIX 1
#define FL_FLOCK 2
#define FL_OFD 4
#define FL_LEASE 8
/* for posix fcntl() and lockf() */
#ifndef F_RDLCK
#define F_RDLCK 0
#define F_WRLCK 1
#define F_UNLCK 2
#endif
/* for OFD locks fcntl() */
#ifndef F_OFD_GETLK
#define F_OFD_GETLK 36
#define F_OFD_SETLK 37
#define F_OFD_SETLKW 38
#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 */
/* for leases */
#define LEASE_BREAKING 4
struct file_lock {
long long fl_id;
int fl_kind;
int fl_ltype;
pid_t fl_owner; /* process, which created the lock */
pid_t fl_holder; /* pid of fd on whose the lock is found */
int maj, min;
unsigned long i_no;
long long start;
char end[32];
struct list_head list; /* list of all file locks */
int real_owner;
int owners_fd;
};
extern struct list_head file_lock_list;
extern struct file_lock *alloc_file_lock(void);
extern void free_file_locks(void);
extern int prepare_file_locks(int pid);
extern struct collect_image_info file_locks_cinfo;
struct pid;
struct fd_parms;
extern void discard_dup_locks_tail(pid_t pid, int fd);
extern int correct_file_leases_type(struct pid *, int fd, int lfd);
extern int note_file_lock(struct pid *, int fd, int lfd, struct fd_parms *);
extern int dump_file_locks(void);
#define OPT_FILE_LOCKS "file-locks"
#endif /* __FILE_LOCK_H__ */
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