void wtseek (void)
{
char *name;
int fd;
s64 i;
name = RndName();
fd = creat(name, 0666);
for (i = 0; Segment[i].offset >= 0; i++) {
if (Segment[i].sparse && !Local_option.test_sparse) continue;
write_segment(fd, Segment[i]);
}
close(fd);
fd = open(name, O_RDONLY, 0);
for (i = 0; Segment[i].offset >= 0; i++) {
if (Segment[i].sparse && !Local_option.test_sparse) continue;
check_segment(fd, Segment[i]);
}
for (i = 0; Hole[i].offset >= 0; i++) {
if (Hole[i].sparse && !Local_option.test_sparse) continue;
check_hole(fd, Hole[i]);
}
close(fd);
free(name);
}
static int
compare_fiemap_and_map(int fd, char *map, int blocks, int blocksize)
{
struct fiemap *fiemap;
char *fiebuf;
int blocks_to_map, ret, cur_extent = 0, last_data;
__u64 map_start, map_length;
int i, c;
blocks_to_map = (random() % blocks) + 1;
fiebuf = malloc(sizeof(struct fiemap) +
(blocks_to_map * sizeof(struct fiemap_extent)));
if (!fiebuf) {
perror("Could not allocate fiemap buffers");
return -1;
}
fiemap = (struct fiemap *) fiebuf;
map_start = 0;
map_length = blocks_to_map * blocksize;
for (i = 0; i < blocks; i++) {
if (map[i] != 'H')
last_data = i;
}
fiemap->fm_flags = FIEMAP_FLAG_SYNC;
fiemap->fm_extent_count = blocks_to_map;
fiemap->fm_mapped_extents = 0;
do {
fiemap->fm_start = map_start;
fiemap->fm_length = map_length;
ret = ioctl(fd, FS_IOC_FIEMAP, (unsigned long) fiemap);
if (ret < 0) {
perror("FIEMAP ioctl failed");
free(fiemap);
return -1;
}
if (check_flags(fiemap, blocksize))
goto error;
for (i = cur_extent, c = 1; i < blocks; i++, c++) {
__u64 logical_offset = i * blocksize;
if (c > blocks_to_map)
break;
switch (map[i]) {
case 'D':
if (check_data(fiemap, logical_offset,
blocksize, last_data == i,
0))
goto error;
break;
case 'H':
if (check_hole(fiemap, fd, logical_offset,
blocksize))
goto error;
break;
case 'P':
if (check_data(fiemap, logical_offset,
blocksize, last_data == i,
1))
goto error;
break;
default:
printf("ERROR: weird value in map: %c\n",
map[i]);
goto error;
}
}
cur_extent = i;
map_start = i * blocksize;
} while (cur_extent < blocks);
ret = 0;
return ret;
error:
printf("map is '%s'\n", map);
show_extents(fiemap, blocksize);
return -1;
}
