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()
88 		block->cn = NULL;  in w1_reply_make_space()
97 	if (!(block->request_cn.flags & W1_CN_BUNDLE) && block->cn)  in w1_netlink_check_send()
104  * @ack: determines if cn can be reused
106  * block->cn will be setup with the correct ack, advancing if needed
107  * block->cn->len does not include space for block->msg
112 	if (block->cn && block->cn->ack == ack) {  in w1_netlink_setup_msg()
113 		block->msg = (struct w1_netlink_msg *)(block->cn->data + block->cn->len);  in w1_netlink_setup_msg()
116 		if (block->cn)  in w1_netlink_setup_msg()
117 			block->cn = (struct cn_msg *)(block->cn->data +  in w1_netlink_setup_msg()
118 				block->cn->len);  in w1_netlink_setup_msg()
120 			block->cn = block->first_cn;  in w1_netlink_setup_msg()
122 		memcpy(block->cn, &block->request_cn, sizeof(*block->cn));  in w1_netlink_setup_msg()
123 		block->cn->len = 0;  in w1_netlink_setup_msg()
124 		block->cn->ack = ack;  in w1_netlink_setup_msg()
125 		block->msg = (struct w1_netlink_msg *)block->cn->data;  in w1_netlink_setup_msg()
146 	block->cn->len += sizeof(*block->msg);  in w1_netlink_queue_cmd()
153 	block->cn->len += space;  in w1_netlink_queue_cmd()
169 	block->cn->len += sizeof(*req_msg);  in w1_netlink_queue_status()
175 		block->cn->len += sizeof(*cmd);  in w1_netlink_queue_status()
184  * @cn: original cn_msg
189  * Use when a block isn't available to queue the message to and cn, msg
192 static void w1_netlink_send_error(struct cn_msg *cn, struct w1_netlink_msg *msg,  in w1_netlink_send_error()  argument
196 		struct cn_msg cn;  in w1_netlink_send_error()  member
199 	memcpy(&packet.cn, cn, sizeof(packet.cn));  in w1_netlink_send_error()
201 	packet.cn.len = sizeof(packet.msg);  in w1_netlink_send_error()
204 	cn_netlink_send(&packet.cn, portid, 0, GFP_KERNEL);  in w1_netlink_send_error()
217 		struct cn_msg cn;  in w1_netlink_send()  member
222 	packet.cn.id.idx = CN_W1_IDX;  in w1_netlink_send()
223 	packet.cn.id.val = CN_W1_VAL;  in w1_netlink_send()
225 	packet.cn.seq = dev->seq++;  in w1_netlink_send()
226 	packet.cn.len = sizeof(*msg);  in w1_netlink_send()
231 	cn_netlink_send(&packet.cn, 0, 0, GFP_KERNEL);  in w1_netlink_send()
251 	block->cn->len += sizeof(*data);  in w1_send_slave()
400 	struct cn_msg *cn;  in w1_process_command_root()  local
404 	cn = kmalloc(PAGE_SIZE, GFP_KERNEL);  in w1_process_command_root()
405 	if (!cn)  in w1_process_command_root()
408 	cn->id.idx = CN_W1_IDX;  in w1_process_command_root()
409 	cn->id.val = CN_W1_VAL;  in w1_process_command_root()
411 	cn->seq = req_cn->seq;  in w1_process_command_root()
412 	cn->ack = req_cn->seq + 1;  in w1_process_command_root()
413 	cn->len = sizeof(struct w1_netlink_msg);  in w1_process_command_root()
414 	msg = (struct w1_netlink_msg *)cn->data;  in w1_process_command_root()
423 		if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) {  in w1_process_command_root()
424 			cn_netlink_send(cn, portid, 0, GFP_KERNEL);  in w1_process_command_root()
425 			cn->len = sizeof(struct w1_netlink_msg);  in w1_process_command_root()
432 		cn->len += sizeof(*id);  in w1_process_command_root()
435 	cn_netlink_send(cn, portid, 0, GFP_KERNEL);  in w1_process_command_root()
438 	kfree(cn);  in w1_process_command_root()
535 static void w1_cn_callback(struct cn_msg *cn, struct netlink_skb_parms *nsp)  in w1_cn_callback()  argument
537 	struct w1_netlink_msg *msg = (struct w1_netlink_msg *)(cn + 1);  in w1_cn_callback()
552 	if (cn->flags & ~(W1_CN_BUNDLE)) {  in w1_cn_callback()
553 		w1_netlink_send_error(cn, msg, nsp->portid, -EINVAL);  in w1_cn_callback()
560 	msg_len = cn->len;  in w1_cn_callback()
579 	msg = (struct w1_netlink_msg *)(cn + 1);  in w1_cn_callback()
582 		int reply_size = sizeof(*cn) + cn->len + slave_len;  in w1_cn_callback()
583 		if (cn->flags & W1_CN_BUNDLE) {  in w1_cn_callback()
595 		 * cn->len doesn't include itself which is part of the block  in w1_cn_callback()
598 			sizeof(struct w1_cb_block) + sizeof(*cn) + cn->len +  in w1_cn_callback()
609 			w1_netlink_send_error(cn, msg, nsp->portid, -ENOMEM);  in w1_cn_callback()
614 		block->request_cn = *cn;  in w1_cn_callback()
615 		memcpy(block->request_cn.data, cn->data, cn->len);  in w1_cn_callback()
616 		node = (struct w1_cb_node *)(block->request_cn.data + cn->len);  in w1_cn_callback()
632 	msg_len = cn->len;  in w1_cn_callback()
645 			err = w1_process_command_root(cn, nsp->portid);  in w1_cn_callback()
665 			pr_notice("%s: cn: %x.%x, wrong type: %u, len: %u.\n",  in w1_cn_callback()
666 				__func__, cn->id.idx, cn->id.val,  in w1_cn_callback()
683 			(size_t)((u8 *)msg - (u8 *)cn));  in w1_cn_callback()
699 			w1_netlink_send_error(cn, msg, nsp->portid, err);  in w1_cn_callback()
728 void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *cn)  in w1_netlink_send()  argument