26 	struct cn_msg *cn; /* advances as cn_msg is appeneded */  member
40 	/* pointers within w1_cb_block and cn data */
57 	if (!block->cn)  in w1_reply_len()
59 	return (u8 *)block->cn - (u8 *)block->first_cn + block->cn->len;  in w1_reply_len()
90 		block->cn = NULL;  in w1_reply_make_space()
99 	if (!(block->request_cn.flags & W1_CN_BUNDLE) && block->cn)  in w1_netlink_check_send()
106  * @ack: determines if cn can be reused
108  * block->cn will be setup with the correct ack, advancing if needed
109  * block->cn->len does not include space for block->msg
114 	if (block->cn && block->cn->ack == ack) {  in w1_netlink_setup_msg()
115 		block->msg = (struct w1_netlink_msg *)(block->cn->data + block->cn->len);  in w1_netlink_setup_msg()
118 		if (block->cn)  in w1_netlink_setup_msg()
119 			block->cn = (struct cn_msg *)(block->cn->data +  in w1_netlink_setup_msg()
120 				block->cn->len);  in w1_netlink_setup_msg()
122 			block->cn = block->first_cn;  in w1_netlink_setup_msg()
124 		memcpy(block->cn, &block->request_cn, sizeof(*block->cn));  in w1_netlink_setup_msg()
125 		block->cn->len = 0;  in w1_netlink_setup_msg()
126 		block->cn->ack = ack;  in w1_netlink_setup_msg()
127 		block->msg = (struct w1_netlink_msg *)block->cn->data;  in w1_netlink_setup_msg()
148 	block->cn->len += sizeof(*block->msg);  in w1_netlink_queue_cmd()
155 	block->cn->len += space;  in w1_netlink_queue_cmd()
171 	block->cn->len += sizeof(*req_msg);  in w1_netlink_queue_status()
177 		block->cn->len += sizeof(*cmd);  in w1_netlink_queue_status()
186  * @cn: original cn_msg
191  * Use when a block isn't available to queue the message to and cn, msg
194 static void w1_netlink_send_error(struct cn_msg *cn, struct w1_netlink_msg *msg,  in w1_netlink_send_error()  argument
198 		struct cn_msg cn;  in w1_netlink_send_error()  member
201 	memcpy(&packet.cn, cn, sizeof(packet.cn));  in w1_netlink_send_error()
203 	packet.cn.len = sizeof(packet.msg);  in w1_netlink_send_error()
206 	cn_netlink_send(&packet.cn, portid, 0, GFP_KERNEL);  in w1_netlink_send_error()
219 		struct cn_msg cn;  in w1_netlink_send()  member
224 	packet.cn.id.idx = CN_W1_IDX;  in w1_netlink_send()
225 	packet.cn.id.val = CN_W1_VAL;  in w1_netlink_send()
227 	packet.cn.seq = dev->seq++;  in w1_netlink_send()
228 	packet.cn.len = sizeof(*msg);  in w1_netlink_send()
233 	cn_netlink_send(&packet.cn, 0, 0, GFP_KERNEL);  in w1_netlink_send()
253 	block->cn->len += sizeof(*data);  in w1_send_slave()
402 	struct cn_msg *cn;  in w1_process_command_root()  local
406 	cn = kmalloc(PAGE_SIZE, GFP_KERNEL);  in w1_process_command_root()
407 	if (!cn)  in w1_process_command_root()
410 	cn->id.idx = CN_W1_IDX;  in w1_process_command_root()
411 	cn->id.val = CN_W1_VAL;  in w1_process_command_root()
413 	cn->seq = req_cn->seq;  in w1_process_command_root()
414 	cn->ack = req_cn->seq + 1;  in w1_process_command_root()
415 	cn->len = sizeof(struct w1_netlink_msg);  in w1_process_command_root()
416 	msg = (struct w1_netlink_msg *)cn->data;  in w1_process_command_root()
425 		if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) {  in w1_process_command_root()
426 			cn_netlink_send(cn, portid, 0, GFP_KERNEL);  in w1_process_command_root()
427 			cn->len = sizeof(struct w1_netlink_msg);  in w1_process_command_root()
434 		cn->len += sizeof(*id);  in w1_process_command_root()
437 	cn_netlink_send(cn, portid, 0, GFP_KERNEL);  in w1_process_command_root()
440 	kfree(cn);  in w1_process_command_root()
537 static void w1_cn_callback(struct cn_msg *cn, struct netlink_skb_parms *nsp)  in w1_cn_callback()  argument
539 	struct w1_netlink_msg *msg = (struct w1_netlink_msg *)(cn + 1);  in w1_cn_callback()
554 	if (cn->flags & ~(W1_CN_BUNDLE)) {  in w1_cn_callback()
555 		w1_netlink_send_error(cn, msg, nsp->portid, -EINVAL);  in w1_cn_callback()
562 	msg_len = cn->len;  in w1_cn_callback()
581 	msg = (struct w1_netlink_msg *)(cn + 1);  in w1_cn_callback()
584 		int reply_size = sizeof(*cn) + cn->len + slave_len;  in w1_cn_callback()
585 		if (cn->flags & W1_CN_BUNDLE) {  in w1_cn_callback()
597 		 * cn->len doesn't include itself which is part of the block  in w1_cn_callback()
600 			sizeof(struct w1_cb_block) + sizeof(*cn) + cn->len +  in w1_cn_callback()
611 			w1_netlink_send_error(cn, msg, nsp->portid, -ENOMEM);  in w1_cn_callback()
616 		block->request_cn = *cn;  in w1_cn_callback()
617 		memcpy(block->request_cn.data, cn->data, cn->len);  in w1_cn_callback()
618 		node = (struct w1_cb_node *)(block->request_cn.data + cn->len);  in w1_cn_callback()
634 	msg_len = cn->len;  in w1_cn_callback()
647 			err = w1_process_command_root(cn, nsp->portid);  in w1_cn_callback()
667 			pr_notice("%s: cn: %x.%x, wrong type: %u, len: %u.\n",  in w1_cn_callback()
668 				__func__, cn->id.idx, cn->id.val,  in w1_cn_callback()
685 			(size_t)((u8 *)msg - (u8 *)cn));  in w1_cn_callback()
701 			w1_netlink_send_error(cn, msg, nsp->portid, err);  in w1_cn_callback()
730 void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *cn)  in w1_netlink_send()  argument