Re: [RFCv6 05/26] Bluetooth: A2MP: Build and Send msg helpers

[Gustavo Padovan <gustavo@padovan.org>]

Hi Andrei,

* Andrei Emeltchenko <Andrei.Emeltchenko.news@gmail.com> [2012-03-28 16:31:28 +0300]:

> From: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
> 
> Helper function to build and send A2MP messages.
> 
> Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
> ---
>  include/net/bluetooth/a2mp.h |    7 ++++++
>  net/bluetooth/a2mp.c         |   48 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 55 insertions(+), 0 deletions(-)
> 
> diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
> index 0fe8ddd..995f1c0 100644
> --- a/include/net/bluetooth/a2mp.h
> +++ b/include/net/bluetooth/a2mp.h
> @@ -24,6 +24,13 @@ struct amp_mgr {
>  	unsigned long		flags;
>  };
>  
> +struct a2mp_cmd {
> +	__u8	code;
> +	__u8	ident;
> +	__le16	len;
> +	__u8	data[0];
> +} __packed;
> +
>  void amp_mgr_get(struct amp_mgr *mgr);
>  int amp_mgr_put(struct amp_mgr *mgr);
>  
> diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
> index 7e707ce..b572f9f 100644
> --- a/net/bluetooth/a2mp.c
> +++ b/net/bluetooth/a2mp.c
> @@ -17,6 +17,54 @@
>  #include <net/bluetooth/l2cap.h>
>  #include <net/bluetooth/a2mp.h>
>  
> +/* A2MP build & send command helper functions */
> +static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
> +{
> +	struct a2mp_cmd *cmd;
> +	int plen;
> +
> +	plen = sizeof(*cmd) + len;
> +	cmd = kzalloc(plen, GFP_KERNEL);
> +	if (!cmd)
> +		return NULL;
> +
> +	cmd->code = code;
> +	cmd->ident = ident;
> +	cmd->len = cpu_to_le16(len);
> +
> +	memcpy(cmd->data, data, len);
> +
> +	return cmd;
> +}
> +
> +static inline int __a2mp_send(struct amp_mgr *mgr, u8 *data, int len)
> +{
> +	struct l2cap_chan *chan = mgr->a2mp_chan;
> +	struct kvec iv = { data, len };
> +	struct msghdr msg;
> +
> +	memset(&msg, 0, sizeof(msg));
> +
> +	msg.msg_iov = (struct iovec *) &iv;
> +	msg.msg_iovlen = 1;
> +
> +	return l2cap_chan_send(chan, &msg, len, 0);
> +}
> +
> +static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len,
> +		      void *data)
> +{
> +	struct a2mp_cmd *cmd;
> +
> +	cmd = __a2mp_build(code, ident, len, data);
> +	if (!cmd)
> +		return;
> +
> +	__a2mp_send(mgr, (u8 *)cmd, len + sizeof(*cmd));

Do you really need __a2mp_send(), are you going to use it somewhere else? If
not just inline its code here.

	Gustavo