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); }