common.h

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/*
 * Header for internal functions and definitions
 */

#ifndef _COMMON_H
#define _COMMON_H

#include <sys/types.h>  /* for ssize_t and off_t */
#include <stdint.h>     /* for uint*_t */
#include <sys/uio.h>    /* for struct iovec */
#include <pthread.h>    /* pthread_mutex_t */

#include "fiu-local.h"  /* for fault injection functions */

#define _F_READ         0x00001
#define _F_WRITE        0x00010
#define _F_LOCK         0x00100
#define _F_TLOCK        0x01000
#define _F_ULOCK        0x10000

#define F_LOCKR         (_F_LOCK | _F_READ)
#define F_LOCKW         (_F_LOCK | _F_WRITE)
#define F_TLOCKR        (_F_TLOCK | _F_READ)
#define F_TLOCKW        (_F_TLOCK | _F_WRITE)
#define F_UNLOCK        (_F_ULOCK)

#define MAX_TSIZE       (SSIZE_MAX)

struct jfs {
        int fd;

        char *name;

        char *jdir;

        int jdirfd;

        int jfd;

        unsigned int *jmap;

        uint32_t flags;

        uint32_t open_flags;

        struct jlinger *ltrans;

        size_t ltrans_len;

        pthread_mutex_t ltlock;

        pthread_mutex_t lock;

        struct autosync_cfg *as_cfg;
};


off_t plockf(int fd, int cmd, off_t offset, off_t len);
ssize_t spread(int fd, void *buf, size_t count, off_t offset);
ssize_t spwrite(int fd, const void *buf, size_t count, off_t offset);
ssize_t swritev(int fd, struct iovec *iov, int iovcnt);
int get_jdir(const char *filename, char *jdir);
void get_jtfile(struct jfs *fs, unsigned int tid, char *jtfile);
uint64_t ntohll(uint64_t x);
uint64_t htonll(uint64_t x);

uint32_t checksum_buf(uint32_t sum, const unsigned char *buf, size_t count);

void autosync_check(struct jfs *fs);

#endif

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