78 	int (*write_data_chunk)(struct output_file *out, unsigned int len,
80 	int (*write_fill_chunk)(struct output_file *out, unsigned int len,
82 	int (*write_skip_chunk)(struct output_file *out, int64_t len);
83 	int (*write_end_chunk)(struct output_file *out);
101 	struct output_file out;  member
106 	container_of((_o), struct output_file_gz, out)
109 	struct output_file out;  member
114 	container_of((_o), struct output_file_normal, out)
117 	struct output_file out;  member
123 	container_of((_o), struct output_file_callback, out)
125 static int file_open(struct output_file *out, int fd)  in file_open()  argument
127 	struct output_file_normal *outn = to_output_file_normal(out);  in file_open()
133 static int file_skip(struct output_file *out, int64_t cnt)  in file_skip()  argument
136 	struct output_file_normal *outn = to_output_file_normal(out);  in file_skip()
146 static int file_pad(struct output_file *out, int64_t len)  in file_pad()  argument
149 	struct output_file_normal *outn = to_output_file_normal(out);  in file_pad()
159 static int file_write(struct output_file *out, void *data, int len)  in file_write()  argument
162 	struct output_file_normal *outn = to_output_file_normal(out);  in file_write()
176 static void file_close(struct output_file *out)  in file_close()  argument
178 	struct output_file_normal *outn = to_output_file_normal(out);  in file_close()
191 static int gz_file_open(struct output_file *out, int fd)  in gz_file_open()  argument
193 	struct output_file_gz *outgz = to_output_file_gz(out);  in gz_file_open()
205 static int gz_file_skip(struct output_file *out, int64_t cnt)  in gz_file_skip()  argument
208 	struct output_file_gz *outgz = to_output_file_gz(out);  in gz_file_skip()
218 static int gz_file_pad(struct output_file *out, int64_t len)  in gz_file_pad()  argument
221 	struct output_file_gz *outgz = to_output_file_gz(out);  in gz_file_pad()
242 static int gz_file_write(struct output_file *out, void *data, int len)  in gz_file_write()  argument
245 	struct output_file_gz *outgz = to_output_file_gz(out);  in gz_file_write()
259 static void gz_file_close(struct output_file *out)  in gz_file_close()  argument
261 	struct output_file_gz *outgz = to_output_file_gz(out);  in gz_file_close()
275 static int callback_file_open(struct output_file *out, int fd)  in callback_file_open()  argument
280 static int callback_file_skip(struct output_file *out, int64_t off)  in callback_file_skip()  argument
282 	struct output_file_callback *outc = to_output_file_callback(out);  in callback_file_skip()
298 static int callback_file_pad(struct output_file *out, int64_t len)  in callback_file_pad()  argument
303 static int callback_file_write(struct output_file *out, void *data, int len)  in callback_file_write()  argument
306 	struct output_file_callback *outc = to_output_file_callback(out);  in callback_file_write()
311 static void callback_file_close(struct output_file *out)  in callback_file_close()  argument
313 	struct output_file_callback *outc = to_output_file_callback(out);  in callback_file_close()
348 static int write_sparse_skip_chunk(struct output_file *out, int64_t skip_len)  in write_sparse_skip_chunk()  argument
353 	if (skip_len % out->block_size) {  in write_sparse_skip_chunk()
355 				skip_len, out->block_size);  in write_sparse_skip_chunk()
362 	chunk_header.chunk_sz = skip_len / out->block_size;  in write_sparse_skip_chunk()
364 	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));  in write_sparse_skip_chunk()
368 	out->cur_out_ptr += skip_len;  in write_sparse_skip_chunk()
369 	out->chunk_cnt++;  in write_sparse_skip_chunk()
374 static int write_sparse_fill_chunk(struct output_file *out, unsigned int len,  in write_sparse_fill_chunk()  argument
383 	rnd_up_len = ALIGN(len, out->block_size);  in write_sparse_fill_chunk()
388 	chunk_header.chunk_sz = rnd_up_len / out->block_size;  in write_sparse_fill_chunk()
390 	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));  in write_sparse_fill_chunk()
394 	ret = out->ops->write(out, &fill_val, sizeof(fill_val));  in write_sparse_fill_chunk()
398 	if (out->use_crc) {  in write_sparse_fill_chunk()
399 		count = out->block_size / sizeof(uint32_t);  in write_sparse_fill_chunk()
401 			out->crc32 = sparse_crc32(out->crc32, &fill_val, sizeof(uint32_t));  in write_sparse_fill_chunk()
404 	out->cur_out_ptr += rnd_up_len;  in write_sparse_fill_chunk()
405 	out->chunk_cnt++;  in write_sparse_fill_chunk()
410 static int write_sparse_data_chunk(struct output_file *out, unsigned int len,  in write_sparse_data_chunk()  argument
418 	rnd_up_len = ALIGN(len, out->block_size);  in write_sparse_data_chunk()
424 	chunk_header.chunk_sz = rnd_up_len / out->block_size;  in write_sparse_data_chunk()
426 	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));  in write_sparse_data_chunk()
430 	ret = out->ops->write(out, data, len);  in write_sparse_data_chunk()
434 		ret = out->ops->write(out, out->zero_buf, zero_len);  in write_sparse_data_chunk()
439 	if (out->use_crc) {  in write_sparse_data_chunk()
440 		out->crc32 = sparse_crc32(out->crc32, data, len);  in write_sparse_data_chunk()
442 			out->crc32 = sparse_crc32(out->crc32, out->zero_buf, zero_len);  in write_sparse_data_chunk()
445 	out->cur_out_ptr += rnd_up_len;  in write_sparse_data_chunk()
446 	out->chunk_cnt++;  in write_sparse_data_chunk()
451 int write_sparse_end_chunk(struct output_file *out)  in write_sparse_end_chunk()  argument
456 	if (out->use_crc) {  in write_sparse_end_chunk()
462 		ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));  in write_sparse_end_chunk()
466 		out->ops->write(out, &out->crc32, 4);  in write_sparse_end_chunk()
471 		out->chunk_cnt++;  in write_sparse_end_chunk()
484 static int write_normal_data_chunk(struct output_file *out, unsigned int len,  in write_normal_data_chunk()  argument
488 	unsigned int rnd_up_len = ALIGN(len, out->block_size);  in write_normal_data_chunk()
490 	ret = out->ops->write(out, data, len);  in write_normal_data_chunk()
496 		ret = out->ops->skip(out, rnd_up_len - len);  in write_normal_data_chunk()
502 static int write_normal_fill_chunk(struct output_file *out, unsigned int len,  in write_normal_fill_chunk()  argument
510 	for (i = 0; i < out->block_size / sizeof(uint32_t); i++) {  in write_normal_fill_chunk()
511 		out->fill_buf[i] = fill_val;  in write_normal_fill_chunk()
515 		write_len = min(len, out->block_size);  in write_normal_fill_chunk()
516 		ret = out->ops->write(out, out->fill_buf, write_len);  in write_normal_fill_chunk()
527 static int write_normal_skip_chunk(struct output_file *out, int64_t len)  in write_normal_skip_chunk()  argument
529 	return out->ops->skip(out, len);  in write_normal_skip_chunk()
532 int write_normal_end_chunk(struct output_file *out)  in write_normal_end_chunk()  argument
534 	return out->ops->pad(out, out->len);  in write_normal_end_chunk()
544 void output_file_close(struct output_file *out)  in output_file_close()  argument
548 	out->sparse_ops->write_end_chunk(out);  in output_file_close()
549 	out->ops->close(out);  in output_file_close()
552 static int output_file_init(struct output_file *out, int block_size,  in output_file_init()  argument
557 	out->len = len;  in output_file_init()
558 	out->block_size = block_size;  in output_file_init()
559 	out->cur_out_ptr = 0ll;  in output_file_init()
560 	out->chunk_cnt = 0;  in output_file_init()
561 	out->crc32 = 0;  in output_file_init()
562 	out->use_crc = crc;  in output_file_init()
564 	out->zero_buf = calloc(block_size, 1);  in output_file_init()
565 	if (!out->zero_buf) {  in output_file_init()
570 	out->fill_buf = calloc(block_size, 1);  in output_file_init()
571 	if (!out->fill_buf) {  in output_file_init()
578 		out->sparse_ops = &sparse_file_ops;  in output_file_init()
580 		out->sparse_ops = &normal_file_ops;  in output_file_init()
590 				.blk_sz = out->block_size,  in output_file_init()
591 				.total_blks = out->len / out->block_size,  in output_file_init()
596 		if (out->use_crc) {  in output_file_init()
600 		ret = out->ops->write(out, &sparse_header, sizeof(sparse_header));  in output_file_init()
609 	free(out->fill_buf);  in output_file_init()
611 	free(out->zero_buf);  in output_file_init()
623 	outgz->out.ops = &gz_file_ops;  in output_file_new_gz()
625 	return &outgz->out;  in output_file_new_gz()
636 	outn->out.ops = &file_ops;  in output_file_new_normal()
638 	return &outn->out;  in output_file_new_normal()
654 	outc->out.ops = &callback_file_ops;  in output_file_open_callback()
658 	ret = output_file_init(&outc->out, block_size, len, sparse, chunks, crc);  in output_file_open_callback()
664 	return &outc->out;  in output_file_open_callback()
671 	struct output_file *out;  in output_file_open_fd()  local
674 		out = output_file_new_gz();  in output_file_open_fd()
676 		out = output_file_new_normal();  in output_file_open_fd()
679 	out->ops->open(out, fd);  in output_file_open_fd()
681 	ret = output_file_init(out, block_size, len, sparse, chunks, crc);  in output_file_open_fd()
683 		free(out);  in output_file_open_fd()
687 	return out;  in output_file_open_fd()
691 int write_data_chunk(struct output_file *out, unsigned int len, void *data)  in write_data_chunk()  argument
693 	return out->sparse_ops->write_data_chunk(out, len, data);  in write_data_chunk()
697 int write_fill_chunk(struct output_file *out, unsigned int len,  in write_fill_chunk()  argument
700 	return out->sparse_ops->write_fill_chunk(out, len, fill_val);  in write_fill_chunk()
703 int write_fd_chunk(struct output_file *out, unsigned int len,  in write_fd_chunk()  argument
740 	ret = out->sparse_ops->write_data_chunk(out, len, ptr);  in write_fd_chunk()
752 int write_file_chunk(struct output_file *out, unsigned int len,  in write_file_chunk()  argument
762 	ret = write_fd_chunk(out, len, file_fd, offset);  in write_file_chunk()
769 int write_skip_chunk(struct output_file *out, int64_t len)  in write_skip_chunk()  argument
771 	return out->sparse_ops->write_skip_chunk(out, len);  in write_skip_chunk()