Lines Matching refs:cn
26 struct cn_msg *cn; /* advances as cn_msg is appeneded */
40 /* pointers within w1_cb_block and cn data */
57 if (!block->cn)
59 return (u8 *)block->cn - (u8 *)block->first_cn + block->cn->len;
88 block->cn = NULL;
97 if (!(block->request_cn.flags & W1_CN_BUNDLE) && block->cn)
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) {
113 block->msg = (struct w1_netlink_msg *)(block->cn->data + block->cn->len);
116 if (block->cn)
117 block->cn = (struct cn_msg *)(block->cn->data +
118 block->cn->len);
120 block->cn = block->first_cn;
122 memcpy(block->cn, &block->request_cn, sizeof(*block->cn));
123 block->cn->len = 0;
124 block->cn->ack = ack;
125 block->msg = (struct w1_netlink_msg *)block->cn->data;
146 block->cn->len += sizeof(*block->msg);
153 block->cn->len += space;
169 block->cn->len += sizeof(*req_msg);
175 block->cn->len += sizeof(*cmd);
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,
196 struct cn_msg cn;
199 memcpy(&packet.cn, cn, sizeof(packet.cn));
201 packet.cn.len = sizeof(packet.msg);
204 cn_netlink_send(&packet.cn, portid, 0, GFP_KERNEL);
217 struct cn_msg cn;
222 packet.cn.id.idx = CN_W1_IDX;
223 packet.cn.id.val = CN_W1_VAL;
225 packet.cn.seq = dev->seq++;
226 packet.cn.len = sizeof(*msg);
231 cn_netlink_send(&packet.cn, 0, 0, GFP_KERNEL);
251 block->cn->len += sizeof(*data);
400 struct cn_msg *cn;
404 cn = kmalloc(PAGE_SIZE, GFP_KERNEL);
405 if (!cn)
408 cn->id.idx = CN_W1_IDX;
409 cn->id.val = CN_W1_VAL;
411 cn->seq = req_cn->seq;
412 cn->ack = req_cn->seq + 1;
413 cn->len = sizeof(struct w1_netlink_msg);
414 msg = (struct w1_netlink_msg *)cn->data;
423 if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) {
424 cn_netlink_send(cn, portid, 0, GFP_KERNEL);
425 cn->len = sizeof(struct w1_netlink_msg);
432 cn->len += sizeof(*id);
435 cn_netlink_send(cn, portid, 0, GFP_KERNEL);
438 kfree(cn);
535 static void w1_cn_callback(struct cn_msg *cn, struct netlink_skb_parms *nsp)
537 struct w1_netlink_msg *msg = (struct w1_netlink_msg *)(cn + 1);
552 if (cn->flags & ~(W1_CN_BUNDLE)) {
553 w1_netlink_send_error(cn, msg, nsp->portid, -EINVAL);
560 msg_len = cn->len;
579 msg = (struct w1_netlink_msg *)(cn + 1);
582 int reply_size = sizeof(*cn) + cn->len + slave_len;
583 if (cn->flags & W1_CN_BUNDLE) {
595 * cn->len doesn't include itself which is part of the block
598 sizeof(struct w1_cb_block) + sizeof(*cn) + cn->len +
609 w1_netlink_send_error(cn, msg, nsp->portid, -ENOMEM);
614 memcpy(&block->request_cn, cn, sizeof(*cn) + cn->len);
615 node = (struct w1_cb_node *)(block->request_cn.data + cn->len);
631 msg_len = cn->len;
644 err = w1_process_command_root(cn, nsp->portid);
664 pr_notice("%s: cn: %x.%x, wrong type: %u, len: %u.\n",
665 __func__, cn->id.idx, cn->id.val,
682 (size_t)((u8 *)msg - (u8 *)cn));
698 w1_netlink_send_error(cn, msg, nsp->portid, err);
727 void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *cn)