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#define _LARGEFILE64_SOURCE
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <libgen.h>
#include <linux/hdreg.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <inttypes.h>
struct file_ext {
__u32 f_pos;
__u32 start_blk;
__u32 end_blk;
__u32 blk_count;
};
void print_ext(struct file_ext *ext)
{
if (ext->end_blk == 0)
printf("%8d %8d %8d %8d\n", ext->f_pos, 0, 0, ext->blk_count);
else
printf("%8d %8d %8d %8d\n", ext->f_pos, ext->start_blk,
ext->end_blk, ext->blk_count);
}
void print_stat(struct stat64 *st)
{
printf("--------------------------------------------\n");
printf("dev [%d:%d]\n", major(st->st_dev), minor(st->st_dev));
printf("ino [0x%8"PRIx64" : %"PRIu64"]\n",
st->st_ino, st->st_ino);
printf("mode [0x%8x : %d]\n", st->st_mode, st->st_mode);
printf("nlink [0x%8lx : %ld]\n", st->st_nlink, st->st_nlink);
printf("uid [0x%8x : %d]\n", st->st_uid, st->st_uid);
printf("gid [0x%8x : %d]\n", st->st_gid, st->st_gid);
printf("size [0x%8"PRIx64" : %"PRIu64"]\n",
st->st_size, st->st_size);
printf("blksize [0x%8lx : %ld]\n", st->st_blksize, st->st_blksize);
printf("blocks [0x%8"PRIx64" : %"PRIu64"]\n",
st->st_blocks, st->st_blocks);
printf("--------------------------------------------\n\n");
}
void stat_bdev(struct stat64 *st, unsigned int *start_lba)
{
struct stat bdev_stat;
struct hd_geometry geom;
char devname[32] = { 0, };
char linkname[32] = { 0, };
int fd;
sprintf(devname, "/dev/block/%d:%d", major(st->st_dev), minor(st->st_dev));
fd = open(devname, O_RDONLY);
if (fd < 0)
return;
if (fstat(fd, &bdev_stat) < 0)
goto out;
if (S_ISBLK(bdev_stat.st_mode)) {
if (ioctl(fd, HDIO_GETGEO, &geom) < 0)
*start_lba = 0;
else
*start_lba = geom.start;
}
if (readlink(devname, linkname, sizeof(linkname)) < 0)
goto out;
printf("----------------bdev info-------------------\n");
printf("devname = %s\n", basename(linkname));
printf("start_lba = %u\n", *start_lba);
out:
close(fd);
}
int main(int argc, char *argv[])
{
int fd;
int ret = 0;
char *filename;
struct stat64 st;
int total_blks;
unsigned int i;
struct file_ext ext;
__u32 start_lba;
__u32 blknum;
if (argc != 2) {
fprintf(stderr, "No filename\n");
exit(-1);
}
filename = argv[1];
fd = open(filename, O_RDONLY|O_LARGEFILE);
if (fd < 0) {
ret = errno;
perror(filename);
exit(-1);
}
fsync(fd);
if (fstat64(fd, &st) < 0) {
ret = errno;
perror(filename);
goto out;
}
stat_bdev(&st, &start_lba);
total_blks = (st.st_size + st.st_blksize - 1) / st.st_blksize;
printf("\n----------------file info-------------------\n");
printf("%s :\n", filename);
print_stat(&st);
printf("file_pos start_blk end_blk blks\n");
blknum = 0;
if (ioctl(fd, FIBMAP, &blknum) < 0) {
ret = errno;
perror("ioctl(FIBMAP)");
goto out;
}
ext.f_pos = 0;
ext.start_blk = blknum;
ext.end_blk = blknum;
ext.blk_count = 1;
for (i = 1; i < total_blks; i++) {
blknum = i;
if (ioctl(fd, FIBMAP, &blknum) < 0) {
ret = errno;
perror("ioctl(FIBMAP)");
goto out;
}
if ((blknum == 0 && blknum == ext.end_blk) || (ext.end_blk + 1) == blknum) {
ext.end_blk = blknum;
ext.blk_count++;
} else {
print_ext(&ext);
ext.f_pos = i * st.st_blksize;
ext.start_blk = blknum;
ext.end_blk = blknum;
ext.blk_count = 1;
}
}
print_ext(&ext);
out:
close(fd);
return ret;
}
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