misc.h

reiserfsprogs-3.6.19.tar.gz 源码 给有需要的人！

/*
 * Copyright 1996-2004 by Hans Reiser, licensing governed by 
 * reiserfsprogs/README
 */

/* nothing abount reiserfs here */

#ifndef REISERFSPROGS_MISC_H
#define REISERFSPROGS_MISC_H

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>

#include <linux/major.h>

#if MAJOR_IN_MKDEV
#   include <sys/mkdev.h>
#elif MAJOR_IN_SYSMACROS
#   include <sys/sysmacros.h>
#endif

#include "swab.h"

#define POSITION_FOUND          8
#define POSITION_NOT_FOUND      9

#define INVAL_PTR	(void *)-1

void check_memory_msg(void);
void die (char * fmt, ...) __attribute__ ((format (printf, 1, 2)));
void * getmem (int size);
void *mem_alloc(int size);
void freemem (void * p);
void checkmem (char * p, int size);
void * expandmem (void * p, int size, int by);
unsigned int get_mem_size (char * p);
void check_and_free_mem (void);
char * kdevname (int dev);

typedef enum mount_flags {
	MF_NOT_MOUNTED  = 0x0,
	MF_RO		= 0x1,
	MF_RW		= 0x2
} mount_flags_t;

typedef struct mount_hint {
    char *point;	/* Mount point. */
    __u32 psize;	/* Mount point buffer size. */
    __u32 flags;	/* Mount flags. */
} mount_hint_t;

struct mntent *misc_mntent(char *device);
int misc_device_mounted(char *device);
	
void misc_print_credit(FILE *out);

typedef struct dma_info {
    int fd;
    struct stat st;
    int support_type;
    int dma;
    __u64 speed;
} dma_info_t;

int prepare_dma_check(dma_info_t *dma_info);
int get_dma_info(dma_info_t *dma_info);
void clean_after_dma_check(int fd, dma_info_t *dma_info);

int valid_offset( int fd, loff_t offset);
unsigned long count_blocks (char * filename, int blocksize);

void print_how_far (FILE * fp, unsigned long *passed, unsigned long total, unsigned int inc, int quiet);
void print_how_fast (unsigned long total, 
		     unsigned long passed, int cursor_pos, int reset_time);
__u32 get_random (void);

int user_confirmed (FILE * fp, char * q, char * yes);

extern inline int misc_set_bit (unsigned long long nr, void * addr);
extern inline int misc_clear_bit (unsigned long long nr, void * addr);
extern inline int misc_test_bit(unsigned long long nr, const void * addr);
extern inline unsigned long long misc_find_first_zero_bit (const void *vaddr, unsigned long long size);
extern inline unsigned long long misc_find_next_zero_bit (const void *vaddr, unsigned long long size, unsigned long long offset);
extern inline unsigned long long misc_find_next_set_bit(const void *vaddr, unsigned long long size, unsigned long long offset);
extern inline unsigned long long misc_find_first_set_bit (const void *vaddr, unsigned long long size);

#define STAT_FIELD_H(Field, Type)	\
inline Type misc_device_##Field(char *device);

STAT_FIELD_H(mode, mode_t);
STAT_FIELD_H(rdev, dev_t);
STAT_FIELD_H(size, off_t);
STAT_FIELD_H(blocks, blkcnt_t);

__u16 mask16 (int from, int count);
__u32 mask32 (int from, int count);
__u64 mask64 (int from, int count);

int reiserfs_bin_search (void * key, void * base, __u32 num, int width,
			 __u32 *ppos, __compar_fn_t comp_func);

struct block_handler {
    __u32 blocknr;
    dev_t device;
};

int  blocklist__is_block_saved (struct block_handler ** base, __u32 * count, __u32 blocknr, 
    dev_t device, __u32 * position);
void blocklist__insert_in_position (void * block_h, void ** base, __u32 * count, 
    int elem_size, __u32 * position);
int blockdev_list_compare (const void * block1, const void * block2);
			
			 
#define set_bit_field_XX(XX,vp,val,from,count) \
{\
    __u##XX * p, tmp;\
\
    /* make sure that given value can be put in 'count' bits */\
    if (val > (1 << count))\
	die ("set_bit_field: val %d is too big for %d bits", val, count);\
\
    p = (__u##XX *)vp;\
    tmp = le##XX##_to_cpu (*p);\
\
    /* clear 'count' bits starting from 'from'-th one */\
    tmp &= ~mask##XX (from, count);\
\
    /* put given value in proper bits */\
    tmp |= (val << from);\
\
    *p = cpu_to_le##XX (tmp);\
}


#define get_bit_field_XX(XX,vp,from,count) \
\
    __u##XX * p, tmp;\
\
    p = (__u##XX *)vp;\
    tmp = le##XX##_to_cpu (*p);\
\
    /* clear all bits but 'count' bits starting from 'from'-th one */\
    tmp &= mask##XX (from, count);\
\
    /* get value written in specified bits */\
    tmp >>= from;\
    return tmp;


#ifndef major
#define major(rdev)      ((rdev)>>8)
#define minor(rdev)      ((rdev) & 0xff)
#endif /* major */



#ifndef SCSI_DISK_MAJOR
#define SCSI_DISK_MAJOR(maj) ((maj) == SCSI_DISK0_MAJOR || \
			     ((maj) >= SCSI_DISK1_MAJOR && (maj) <= SCSI_DISK7_MAJOR))
#endif /* SCSI_DISK_MAJOR */
    
#ifndef SCSI_BLK_MAJOR
#define SCSI_BLK_MAJOR(maj)  (SCSI_DISK_MAJOR(maj) || (maj) == SCSI_CDROM_MAJOR)
#endif /* SCSI_BLK_MAJOR */

#ifndef IDE_DISK_MAJOR
#ifdef IDE9_MAJOR
#define IDE_DISK_MAJOR(maj) ((maj) == IDE0_MAJOR || (maj) == IDE1_MAJOR || \
			     (maj) == IDE2_MAJOR || (maj) == IDE3_MAJOR || \
			     (maj) == IDE4_MAJOR || (maj) == IDE5_MAJOR || \
			     (maj) == IDE6_MAJOR || (maj) == IDE7_MAJOR || \
			     (maj) == IDE8_MAJOR || (maj) == IDE9_MAJOR)
#else
#define IDE_DISK_MAJOR(maj) ((maj) == IDE0_MAJOR || (maj) == IDE1_MAJOR || \
			     (maj) == IDE2_MAJOR || (maj) == IDE3_MAJOR || \
			     (maj) == IDE4_MAJOR || (maj) == IDE5_MAJOR)
#endif /* IDE9_MAJOR */
#endif /* IDE_DISK_MAJOR */


#endif /* REISERFS_MISC_H */