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Bluetooth: Add timer for automatically disabling the service cache 

We do not want the service cache to be enabled indefinitely after
mgmt_read_info is called. To solve this a timer is added which will
automatically disable the cache if mgmt_set_dev_class isn't called
within 5 seconds of calling mgmt_read_info.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Johan Hedberg 2011-12-15 00:47:39 +02:00 committed by Gustavo F. Padovan
parent ef5803729c
commit 7d78525dcf
3 changed files with 40 additions and 5 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -193,6 +193,8 @@ struct hci_dev {
__u16 discov_timeout;
struct delayed_work discov_off;
struct delayed_work service_cache;
struct timer_list cmd_timer;
struct work_struct rx_work;

3
net/bluetooth/hci_core.c
View File

@ -598,6 +598,9 @@ static int hci_dev_do_close(struct hci_dev *hdev)
if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags))
cancel_delayed_work(&hdev->power_off);
if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->flags))
cancel_delayed_work(&hdev->service_cache);
hci_dev_lock(hdev);
inquiry_cache_flush(hdev);
hci_conn_hash_flush(hdev);

40
net/bluetooth/mgmt.c
View File

@ -35,6 +35,8 @@
#define INQUIRY_LEN_BREDR 0x08 /* TGAP(100) */
#define SERVICE_CACHE_TIMEOUT (5 * 1000)
struct pending_cmd {
struct list_head list;
u16 opcode;
@ -472,6 +474,32 @@ static int update_class(struct hci_dev *hdev)
return hci_send_cmd(hdev, HCI_OP_WRITE_CLASS_OF_DEV, sizeof(cod), cod);
}
static void service_cache_off(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev,
service_cache.work);
if (!test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->flags))
return;
hci_dev_lock(hdev);
update_eir(hdev);
update_class(hdev);
hci_dev_unlock(hdev);
}
static void mgmt_init_hdev(struct hci_dev *hdev)
{
if (!test_and_set_bit(HCI_MGMT, &hdev->flags))
INIT_DELAYED_WORK(&hdev->service_cache, service_cache_off);
if (!test_and_set_bit(HCI_SERVICE_CACHE, &hdev->flags))
schedule_delayed_work(&hdev->service_cache,
msecs_to_jiffies(SERVICE_CACHE_TIMEOUT));
}
static int read_controller_info(struct sock *sk, u16 index)
{
struct mgmt_rp_read_info rp;
@ -489,10 +517,8 @@ static int read_controller_info(struct sock *sk, u16 index)
hci_dev_lock(hdev);
if (test_and_clear_bit(HCI_PI_MGMT_INIT, &hci_pi(sk)->flags)) {
set_bit(HCI_MGMT, &hdev->flags);
set_bit(HCI_SERVICE_CACHE, &hdev->flags);
}
if (test_and_clear_bit(HCI_PI_MGMT_INIT, &hci_pi(sk)->flags))
mgmt_init_hdev(hdev);
memset(&rp, 0, sizeof(rp));
@ -992,8 +1018,12 @@ static int set_dev_class(struct sock *sk, u16 index, unsigned char *data,
hdev->major_class = cp->major;
hdev->minor_class = cp->minor;
if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->flags))
if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->flags)) {
hci_dev_unlock(hdev);
cancel_delayed_work_sync(&hdev->service_cache);
hci_dev_lock(hdev);
update_eir(hdev);
}
err = update_class(hdev);