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Bluetooth: 6lowpan: Remove PSM setting code

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Removing PSM setting debugfs interface as the IPSP has a well
defined PSM value that should be used.

The patch introduces enable flag that can be used to toggle
6lowpan on/off.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Jukka Rissanen 2015-01-08 17:00:55 +02:00 committed by Marcel Holtmann
parent e12af489b9
commit 7b2ed60ed4
1 changed files with 31 additions and 35 deletions
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66
net/bluetooth/6lowpan.c
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@ -31,7 +31,7 @@
#define VERSION "0.1"
static struct dentry *lowpan_psm_debugfs;
static struct dentry *lowpan_enable_debugfs;
static struct dentry *lowpan_control_debugfs;
#define IFACE_NAME_TEMPLATE "bt%d"
@ -55,11 +55,7 @@ struct skb_cb {
static LIST_HEAD(bt_6lowpan_devices);
static DEFINE_SPINLOCK(devices_lock);
/* If psm is set to 0 (default value), then 6lowpan is disabled.
* Other values are used to indicate a Protocol Service Multiplexer
* value for 6lowpan.
*/
static u16 psm_6lowpan;
static bool enable_6lowpan;
/* We are listening incoming connections via this channel
*/
@ -761,7 +757,7 @@ static bool is_bt_6lowpan(struct hci_conn *hcon)
if (hcon->type != LE_LINK)
return false;
if (!psm_6lowpan)
if (!enable_6lowpan)
return false;
return true;
@ -1085,7 +1081,7 @@ static int bt_6lowpan_connect(bdaddr_t *addr, u8 dst_type)
if (!pchan)
return -EINVAL;
err = l2cap_chan_connect(pchan, cpu_to_le16(psm_6lowpan), 0,
err = l2cap_chan_connect(pchan, cpu_to_le16(L2CAP_PSM_IPSP), 0,
addr, dst_type);
BT_DBG("chan %p err %d", pchan, err);
@ -1118,7 +1114,7 @@ static struct l2cap_chan *bt_6lowpan_listen(void)
struct l2cap_chan *pchan;
int err;
if (psm_6lowpan == 0)
if (!enable_6lowpan)
return NULL;
pchan = chan_get();
@ -1130,10 +1126,9 @@ static struct l2cap_chan *bt_6lowpan_listen(void)
atomic_set(&pchan->nesting, L2CAP_NESTING_PARENT);
BT_DBG("psm 0x%04x chan %p src type %d", psm_6lowpan, pchan,
pchan->src_type);
BT_DBG("chan %p src type %d", pchan, pchan->src_type);
err = l2cap_add_psm(pchan, addr, cpu_to_le16(psm_6lowpan));
err = l2cap_add_psm(pchan, addr, cpu_to_le16(L2CAP_PSM_IPSP));
if (err) {
l2cap_chan_put(pchan);
BT_ERR("psm cannot be added err %d", err);
@ -1219,22 +1214,23 @@ static void disconnect_all_peers(void)
spin_unlock(&devices_lock);
}
struct set_psm {
struct set_enable {
struct work_struct work;
u16 psm;
bool flag;
};
static void do_psm_set(struct work_struct *work)
static void do_enable_set(struct work_struct *work)
{
struct set_psm *set_psm = container_of(work, struct set_psm, work);
struct set_enable *set_enable = container_of(work,
struct set_enable, work);
if (set_psm->psm == 0 || psm_6lowpan != set_psm->psm)
if (!set_enable->flag || enable_6lowpan != set_enable->flag)
/* Disconnect existing connections if 6lowpan is
* disabled (psm = 0), or if psm changes.
* disabled
*/
disconnect_all_peers();
psm_6lowpan = set_psm->psm;
enable_6lowpan = set_enable->flag;
if (listen_chan) {
l2cap_chan_close(listen_chan, 0);
@ -1243,33 +1239,33 @@ static void do_psm_set(struct work_struct *work)
listen_chan = bt_6lowpan_listen();
kfree(set_psm);
kfree(set_enable);
}
static int lowpan_psm_set(void *data, u64 val)
static int lowpan_enable_set(void *data, u64 val)
{
struct set_psm *set_psm;
struct set_enable *set_enable;
set_psm = kzalloc(sizeof(*set_psm), GFP_KERNEL);
if (!set_psm)
set_enable = kzalloc(sizeof(*set_enable), GFP_KERNEL);
if (!set_enable)
return -ENOMEM;
set_psm->psm = val;
INIT_WORK(&set_psm->work, do_psm_set);
set_enable->flag = !!val;
INIT_WORK(&set_enable->work, do_enable_set);
schedule_work(&set_psm->work);
schedule_work(&set_enable->work);
return 0;
}
static int lowpan_psm_get(void *data, u64 *val)
static int lowpan_enable_get(void *data, u64 *val)
{
*val = psm_6lowpan;
*val = enable_6lowpan;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(lowpan_psm_fops, lowpan_psm_get,
lowpan_psm_set, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(lowpan_enable_fops, lowpan_enable_get,
lowpan_enable_set, "%llu\n");
static ssize_t lowpan_control_write(struct file *fp,
const char __user *user_buffer,
@ -1439,9 +1435,9 @@ static struct notifier_block bt_6lowpan_dev_notifier = {
static int __init bt_6lowpan_init(void)
{
lowpan_psm_debugfs = debugfs_create_file("6lowpan_psm", 0644,
bt_debugfs, NULL,
&lowpan_psm_fops);
lowpan_enable_debugfs = debugfs_create_file("6lowpan_enable", 0644,
bt_debugfs, NULL,
&lowpan_enable_fops);
lowpan_control_debugfs = debugfs_create_file("6lowpan_control", 0644,
bt_debugfs, NULL,
&lowpan_control_fops);
@ -1451,7 +1447,7 @@ static int __init bt_6lowpan_init(void)
static void __exit bt_6lowpan_exit(void)
{
debugfs_remove(lowpan_psm_debugfs);
debugfs_remove(lowpan_enable_debugfs);
debugfs_remove(lowpan_control_debugfs);
if (listen_chan) {