#include <net/tcp_states.h>
#include <linux/nfc.h>
+#include <linux/export.h>
#include "nfc.h"
static int rawsock_add_header(struct sk_buff *skb)
{
-
- if (skb_cow_head(skb, 1))
- return -ENOMEM;
-
- *skb_push(skb, 1) = 0;
+ *skb_push(skb, NFC_HEADER_SIZE) = 0;
return 0;
}
struct msghdr *msg, size_t len)
{
struct sock *sk = sock->sk;
+ struct nfc_dev *dev = nfc_rawsock(sk)->dev;
struct sk_buff *skb;
int rc;
if (sock->state != SS_CONNECTED)
return -ENOTCONN;
- skb = sock_alloc_send_skb(sk, len, msg->msg_flags & MSG_DONTWAIT,
- &rc);
+ skb = sock_alloc_send_skb(sk, len + dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE,
+ msg->msg_flags & MSG_DONTWAIT, &rc);
if (!skb)
return rc;
+ skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
+
rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
if (rc < 0) {
kfree_skb(skb);