static void print_file_extent_item(struct extent_buffer *eb,
struct btrfs_item *item,
struct btrfs_file_extent_item *fi)
{
int extent_type = btrfs_file_extent_type(eb, fi);
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u "
"ram %u compress %d\n",
btrfs_file_extent_inline_item_len(eb, item),
btrfs_file_extent_inline_len(eb, fi),
btrfs_file_extent_compression(eb, fi));
return;
}
if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
printf("\t\tprealloc data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\tprealloc data offset %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
return;
}
printf("\t\textent data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\textent data offset %llu nr %llu ram %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
(unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
printf("\t\textent compression %d\n",
btrfs_file_extent_compression(eb, fi));
}
static int copy_one_inline(struct btrfs_root *root, int fd,
struct btrfs_path *path, u64 pos)
{
struct extent_buffer *leaf = path->nodes[0];
struct btrfs_file_extent_item *fi;
char buf[4096];
char *outbuf;
u64 ram_size;
ssize_t done;
unsigned long ptr;
int ret;
int len;
int inline_item_len;
int compress;
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
ptr = btrfs_file_extent_inline_start(fi);
len = btrfs_file_extent_ram_bytes(leaf, fi);
inline_item_len = btrfs_file_extent_inline_item_len(leaf, btrfs_item_nr(path->slots[0]));
read_extent_buffer(leaf, buf, ptr, inline_item_len);
compress = btrfs_file_extent_compression(leaf, fi);
if (compress == BTRFS_COMPRESS_NONE) {
done = pwrite(fd, buf, len, pos);
if (done < len) {
fprintf(stderr, "Short inline write, wanted %d, did "
"%zd: %d\n", len, done, errno);
return -1;
}
return 0;
}
ram_size = btrfs_file_extent_ram_bytes(leaf, fi);
outbuf = calloc(1, ram_size);
if (!outbuf) {
error("not enough memory");
return -ENOMEM;
}
ret = decompress(root, buf, outbuf, inline_item_len, &ram_size,
compress);
if (ret) {
free(outbuf);
return ret;
}
done = pwrite(fd, outbuf, ram_size, pos);
free(outbuf);
if (done < ram_size) {
fprintf(stderr, "Short compressed inline write, wanted %Lu, "
"did %zd: %d\n", ram_size, done, errno);
return -1;
}
return 0;
}
static void print_file_extent_item(struct extent_buffer *eb,
struct btrfs_item *item,
int slot,
struct btrfs_file_extent_item *fi)
{
int extent_type = btrfs_file_extent_type(eb, fi);
char compress_str[16];
compress_type_to_str(btrfs_file_extent_compression(eb, fi),
compress_str);
printf("\t\tgeneration %llu type %hhu (%s)\n",
btrfs_file_extent_generation(eb, fi),
extent_type, file_extent_type_to_str(extent_type));
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u ram_bytes %u compression %hhu (%s)\n",
btrfs_file_extent_inline_item_len(eb, item),
btrfs_file_extent_inline_len(eb, slot, fi),
btrfs_file_extent_compression(eb, fi),
compress_str);
return;
}
if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
printf("\t\tprealloc data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\tprealloc data offset %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
return;
}
printf("\t\textent data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\textent data offset %llu nr %llu ram %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
(unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
printf("\t\textent compression %hhu (%s)\n",
btrfs_file_extent_compression(eb, fi),
compress_str);
}
