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Bluetooth: Refactor HCI request variables into own struct

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In order to shrink the size of bt_skb_cb, this patch moves the HCI
request related variables into their own req_ctrl struct. Additionall
the L2CAP and HCI request structs are placed inside the same union since
they will never be used at the same time for the same skb.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2015-03-30 23:21:02 +03:00 • committed by Marcel Holtmann
commit db6e3e8d01
5 changed files with 22 additions and 16 deletions
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12
include/net/bluetooth/bluetooth.h
View file

@ -278,16 +278,22 @@ struct hci_dev;
typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
struct req_ctrl {
bool start;
u8 event;
hci_req_complete_t complete;
};
struct bt_skb_cb {
__u8 pkt_type;
__u8 force_active;
__u16 opcode;
__u16 expect;
__u8 incoming:1;
__u8 req_start:1;
u8 req_event;
hci_req_complete_t req_complete;
union {
struct l2cap_ctrl l2cap;
struct req_ctrl req;
};
};
#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))

12
net/bluetooth/hci_core.c
View file

@ -3585,7 +3585,7 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
/* Stand-alone HCI commands must be flagged as
* single-command requests.
*/
bt_cb(skb)->req_start = 1;
bt_cb(skb)->req.start = true;
skb_queue_tail(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);
@ -4263,7 +4263,7 @@ static bool hci_req_is_complete(struct hci_dev *hdev)
if (!skb)
return true;
return bt_cb(skb)->req_start;
return bt_cb(skb)->req.start;
}
static void hci_resend_last(struct hci_dev *hdev)
@ -4323,14 +4323,14 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
* command queue (hdev->cmd_q).
*/
if (hdev->sent_cmd) {
req_complete = bt_cb(hdev->sent_cmd)->req_complete;
req_complete = bt_cb(hdev->sent_cmd)->req.complete;
if (req_complete) {
/* We must set the complete callback to NULL to
* avoid calling the callback more than once if
* this function gets called again.
*/
bt_cb(hdev->sent_cmd)->req_complete = NULL;
bt_cb(hdev->sent_cmd)->req.complete = NULL;
goto call_complete;
}
@ -4339,12 +4339,12 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
/* Remove all pending commands belonging to this request */
spin_lock_irqsave(&hdev->cmd_q.lock, flags);
while ((skb = __skb_dequeue(&hdev->cmd_q))) {
if (bt_cb(skb)->req_start) {
if (bt_cb(skb)->req.start) {
__skb_queue_head(&hdev->cmd_q, skb);
break;
}
req_complete = bt_cb(skb)->req_complete;
req_complete = bt_cb(skb)->req.complete;
kfree_skb(skb);
}
spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);

4
net/bluetooth/hci_event.c
View file

@ -3125,7 +3125,7 @@ static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb)
atomic_set(&hdev->cmd_cnt, 1);
if (ev->status ||
(hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->req_event))
(hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->req.event))
hci_req_cmd_complete(hdev, opcode, ev->status);
if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
@ -5049,7 +5049,7 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
skb_pull(skb, HCI_EVENT_HDR_SIZE);
if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->req_event == event) {
if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->req.event == event) {
struct hci_command_hdr *cmd_hdr = (void *) hdev->sent_cmd->data;
u16 opcode = __le16_to_cpu(cmd_hdr->opcode);

6
net/bluetooth/hci_request.c
View file

@ -55,7 +55,7 @@ int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
return -ENODATA;
skb = skb_peek_tail(&req->cmd_q);
bt_cb(skb)->req_complete = complete;
bt_cb(skb)->req.complete = complete;
spin_lock_irqsave(&hdev->cmd_q.lock, flags);
skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
@ -116,9 +116,9 @@ void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
}
if (skb_queue_empty(&req->cmd_q))
bt_cb(skb)->req_start = 1;
bt_cb(skb)->req.start = true;
bt_cb(skb)->req_event = event;
bt_cb(skb)->req.event = event;
skb_queue_tail(&req->cmd_q, skb);
}

2
net/bluetooth/hci_sock.c
View file

@ -1164,7 +1164,7 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
/* Stand-alone HCI commands must be flagged as
* single-command requests.
*/
bt_cb(skb)->req_start = 1;
bt_cb(skb)->req.start = true;
skb_queue_tail(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);