Commit 97e4e802 authored by Luiz Augusto von Dentz's avatar Luiz Augusto von Dentz Committed by Marcel Holtmann
Browse files

Bluetooth: Add bt_skb_sendmmsg helper 



This works similarly to bt_skb_sendmsg but can split the msg into
multiple skb fragments which is useful for stream sockets.

Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 38f64f65

include/net/bluetooth/bluetooth.h

+38 −0
Original line number Diff line number Diff line
@@ -472,6 +472,44 @@ static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk, 
	return skb;

}



/* Similar to bt_skb_sendmsg but can split the msg into multiple fragments

 * accourding to the MTU.

 */

static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,

					      struct msghdr *msg,

					      size_t len, size_t mtu,

					      size_t headroom, size_t tailroom)

{

	struct sk_buff *skb, **frag;



	skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);

	if (IS_ERR_OR_NULL(skb))

		return skb;



	len -= skb->len;

	if (!len)

		return skb;



	/* Add remaining data over MTU as continuation fragments */

	frag = &skb_shinfo(skb)->frag_list;

	while (len) {

		struct sk_buff *tmp;



		tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);

		if (IS_ERR_OR_NULL(tmp)) {

			kfree_skb(skb);

			return tmp;

		}



		len -= tmp->len;



		*frag = tmp;

		frag = &(*frag)->next;

	}



	return skb;

}



int bt_to_errno(u16 code);



void hci_sock_set_flag(struct sock *sk, int nr);