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Commit 17836394 authored by Al Viro's avatar Al Viro
Browse files

first fruits - kill l2cap ->memcpy_fromiovec() 



Just use copy_from_iter().  That's what this method is trying to do
in all cases, in a very convoluted fashion.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent c0371da6

include/net/bluetooth/l2cap.h

+0 −29
Original line number Diff line number Diff line
@@ -606,10 +606,6 @@ struct l2cap_ops { 
	struct sk_buff		*(*alloc_skb) (struct l2cap_chan *chan,

					       unsigned long hdr_len,

					       unsigned long len, int nb);

	int			(*memcpy_fromiovec) (struct l2cap_chan *chan,

						     unsigned char *kdata,

						     struct msghdr *msg,

						     int len);

};



struct l2cap_conn {
@@ -903,31 +899,6 @@ static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 
	return 0;

}



static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,

						 unsigned char *kdata,

						 struct msghdr *msg,

						 int len)

{

	/* Following is safe since for compiler definitions of kvec and

	 * iovec are identical, yielding the same in-core layout and alignment

	 */

	struct kvec *vec = (struct kvec *)msg->msg_iter.iov;



	while (len > 0) {

		if (vec->iov_len) {

			int copy = min_t(unsigned int, len, vec->iov_len);

			memcpy(kdata, vec->iov_base, copy);

			len -= copy;

			kdata += copy;

			vec->iov_base += copy;

			vec->iov_len -= copy;

		}

		vec++;

	}



	return 0;

}



extern bool disable_ertm;



int l2cap_init_sockets(void);

net/bluetooth/6lowpan.c

+1 −2
Original line number Diff line number Diff line
@@ -541,7 +541,7 @@ static int send_pkt(struct l2cap_chan *chan, struct sk_buff *skb, 
	iv.iov_len = skb->len;



	memset(&msg, 0, sizeof(msg));

	iov_iter_init(&msg.msg_iter, WRITE, (struct iovec *) &iv, 1, skb->len);

	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, skb->len);



	err = l2cap_chan_send(chan, &msg, skb->len);

	if (err > 0) {
@@ -1050,7 +1050,6 @@ static const struct l2cap_ops bt_6lowpan_chan_ops = { 
	.suspend		= chan_suspend_cb,

	.get_sndtimeo		= chan_get_sndtimeo_cb,

	.alloc_skb		= chan_alloc_skb_cb,

	.memcpy_fromiovec	= l2cap_chan_no_memcpy_fromiovec,



	.teardown		= l2cap_chan_no_teardown,

	.defer			= l2cap_chan_no_defer,

net/bluetooth/a2mp.c

+1 −2
Original line number Diff line number Diff line
@@ -60,7 +60,7 @@ void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data) 


	memset(&msg, 0, sizeof(msg));



	iov_iter_init(&msg.msg_iter, WRITE, (struct iovec *)&iv, 1, total_len);

	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, total_len);



	l2cap_chan_send(chan, &msg, total_len);
@@ -719,7 +719,6 @@ static const struct l2cap_ops a2mp_chan_ops = { 
	.resume = l2cap_chan_no_resume,

	.set_shutdown = l2cap_chan_no_set_shutdown,

	.get_sndtimeo = l2cap_chan_no_get_sndtimeo,

	.memcpy_fromiovec = l2cap_chan_no_memcpy_fromiovec,

};



static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)

net/bluetooth/l2cap_core.c

+3 −4
Original line number Diff line number Diff line
@@ -2096,8 +2096,7 @@ static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, 
	struct sk_buff **frag;

	int sent = 0;



	if (chan->ops->memcpy_fromiovec(chan, skb_put(skb, count),

					msg, count))

	if (copy_from_iter(skb_put(skb, count), count, &msg->msg_iter) != count)

		return -EFAULT;



	sent += count;
@@ -2117,8 +2116,8 @@ static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, 


		*frag = tmp;



		if (chan->ops->memcpy_fromiovec(chan, skb_put(*frag, count),

						msg, count))

		if (copy_from_iter(skb_put(*frag, count), count,

				   &msg->msg_iter) != count)

			return -EFAULT;



		sent += count;

net/bluetooth/l2cap_sock.c

+0 −8
Original line number Diff line number Diff line
@@ -1336,13 +1336,6 @@ static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, 
	return skb;

}



static int l2cap_sock_memcpy_fromiovec_cb(struct l2cap_chan *chan,

					  unsigned char *kdata,

					  struct msghdr *msg, int len)

{

	return memcpy_from_msg(kdata, msg, len);

}



static void l2cap_sock_ready_cb(struct l2cap_chan *chan)

{

	struct sock *sk = chan->data;
@@ -1427,7 +1420,6 @@ static const struct l2cap_ops l2cap_chan_ops = { 
	.set_shutdown		= l2cap_sock_set_shutdown_cb,

	.get_sndtimeo		= l2cap_sock_get_sndtimeo_cb,

	.alloc_skb		= l2cap_sock_alloc_skb_cb,

	.memcpy_fromiovec	= l2cap_sock_memcpy_fromiovec_cb,

};



static void l2cap_sock_destruct(struct sock *sk)