net/wimax/op-msg.c

6  * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
7  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
21  * 02110-1301, USA.
28  * This is intended for device-specific features, vendor quirks, etc.
48  * to the driver calling wimax_dev->op_msg_from_user(). The return
68  *   wimax_dev->op_msg_from_user()   Delivery of message to the driver
81 #include "wimax-internal.h"
85 #include "debug-levels.h"
89  * wimax_msg_alloc - Create a new skb for sending a message to userspace
111  * wimax_msg_send() depends on skb->data being placed at the
116  * wimax_dev->net_dev pointer is set to point to a proper
134 	result = -ENOMEM;  in wimax_msg_alloc()
145 			     wimax_dev->net_dev->ifindex);  in wimax_msg_alloc()
177  * wimax_msg_data_len - Return a pointer and size of a message's payload
186 	struct nlmsghdr *nlh = (void *) msg->head;  in wimax_msg_data_len()
202  * wimax_msg_data - Return a pointer to a message's payload
208 	struct nlmsghdr *nlh = (void *) msg->head;  in wimax_msg_data()
223  * wimax_msg_len - Return a message's payload length
229 	struct nlmsghdr *nlh = (void *) msg->head;  in wimax_msg_len()
236 		return -EINVAL;  in wimax_msg_len()
244  * wimax_msg_send - Send a pre-allocated message to user space
255  * Sends a free-form message that was preallocated with
256  * wimax_msg_alloc() and filled up.
264  * wimax_msg_send() depends on skb->data being placed at the
269  * wimax_dev->net_dev pointer is set to point to a proper
276 	void *msg = skb->data;  in wimax_msg_send()
277 	size_t size = skb->len;  in wimax_msg_send()
290  * wimax_msg - Send a message to user space
302  * Sends a free-form message to user space on the device @wimax_dev.
312 	int result = -ENOMEM;  in wimax_msg()
338  * The skb is passed to the driver-specific function with the netlink
349 	struct nlmsghdr *nlh = info->nlhdr;  in wimax_gnl_doit_msg_from_user()
356 	result = -ENODEV;  in wimax_gnl_doit_msg_from_user()
357 	if (info->attrs[WIMAX_GNL_MSG_IFIDX] == NULL) {  in wimax_gnl_doit_msg_from_user()
362 	ifindex = nla_get_u32(info->attrs[WIMAX_GNL_MSG_IFIDX]);  in wimax_gnl_doit_msg_from_user()
369 	result = -EINVAL;  in wimax_gnl_doit_msg_from_user()
370 	if (info->attrs[WIMAX_GNL_MSG_DATA] == NULL) {  in wimax_gnl_doit_msg_from_user()
375 	msg_buf = nla_data(info->attrs[WIMAX_GNL_MSG_DATA]);  in wimax_gnl_doit_msg_from_user()
376 	msg_len = nla_len(info->attrs[WIMAX_GNL_MSG_DATA]);  in wimax_gnl_doit_msg_from_user()
378 	if (info->attrs[WIMAX_GNL_MSG_PIPE_NAME] == NULL)  in wimax_gnl_doit_msg_from_user()
381 		struct nlattr *attr = info->attrs[WIMAX_GNL_MSG_PIPE_NAME];  in wimax_gnl_doit_msg_from_user()
383 		/* libnl-1.1 does not yet support NLA_NUL_STRING */  in wimax_gnl_doit_msg_from_user()
384 		result = -ENOMEM;  in wimax_gnl_doit_msg_from_user()
390 	mutex_lock(&wimax_dev->mutex);  in wimax_gnl_doit_msg_from_user()
392 	if (result == -ENOMEDIUM)  in wimax_gnl_doit_msg_from_user()
396 	result = -ENOSYS;  in wimax_gnl_doit_msg_from_user()
397 	if (wimax_dev->op_msg_from_user == NULL)  in wimax_gnl_doit_msg_from_user()
402 		 nlh->nlmsg_len, nlh->nlmsg_type, nlh->nlmsg_flags,  in wimax_gnl_doit_msg_from_user()
403 		 nlh->nlmsg_seq, nlh->nlmsg_pid);  in wimax_gnl_doit_msg_from_user()
407 	result = wimax_dev->op_msg_from_user(wimax_dev, pipe_name,  in wimax_gnl_doit_msg_from_user()
411 	mutex_unlock(&wimax_dev->mutex);  in wimax_gnl_doit_msg_from_user()
415 	dev_put(wimax_dev->net_dev);  in wimax_gnl_doit_msg_from_user()