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Bluetooth: rename hci_conn_put to hci_conn_drop

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We use _get() and _put() for device ref-counting in the kernel. However,
hci_conn_put() is _not_ used for ref-counting, hence, rename it to
hci_conn_drop() so we can later fix ref-counting and introduce
hci_conn_put().

hci_conn_hold() and hci_conn_put() are currently used to manage how long a
connection should be held alive. When the last user drops the connection,
we spawn a delayed work that performs the disconnect. Obviously, this has
nothing to do with ref-counting for the _object_ but rather for the
keep-alive of the connection.

But we really _need_ proper ref-counting for the _object_ to allow
connection-users like rfcomm-tty, HIDP or others.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
David Herrmann 2013-04-06 20:28:37 +02:00 committed by Gustavo Padovan
parent 9f8f962c85
commit 76a68ba0ae
7 changed files with 32 additions and 32 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -612,7 +612,7 @@ static inline void hci_conn_hold(struct hci_conn *conn)
cancel_delayed_work(&conn->disc_work);
}
static inline void hci_conn_put(struct hci_conn *conn)
static inline void hci_conn_drop(struct hci_conn *conn)
{
BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));

6
net/bluetooth/hci_conn.c
View File

@ -433,7 +433,7 @@ int hci_conn_del(struct hci_conn *conn)
struct hci_conn *acl = conn->link;
if (acl) {
acl->link = NULL;
hci_conn_put(acl);
hci_conn_drop(acl);
}
}
@ -565,7 +565,7 @@ static struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type,
if (!sco) {
sco = hci_conn_add(hdev, type, dst);
if (!sco) {
hci_conn_put(acl);
hci_conn_drop(acl);
return ERR_PTR(-ENOMEM);
}
}
@ -980,7 +980,7 @@ void hci_chan_del(struct hci_chan *chan)
synchronize_rcu();
hci_conn_put(conn);
hci_conn_drop(conn);
skb_queue_purge(&chan->data_q);
kfree(chan);

36
net/bluetooth/hci_event.c
View File

@ -1190,7 +1190,7 @@ static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
if (conn) {
if (conn->state == BT_CONFIG) {
hci_proto_connect_cfm(conn, status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
}
@ -1217,7 +1217,7 @@ static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
if (conn) {
if (conn->state == BT_CONFIG) {
hci_proto_connect_cfm(conn, status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
}
@ -1379,7 +1379,7 @@ static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
if (conn) {
if (conn->state == BT_CONFIG) {
hci_proto_connect_cfm(conn, status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
}
@ -1406,7 +1406,7 @@ static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
if (conn) {
if (conn->state == BT_CONFIG) {
hci_proto_connect_cfm(conn, status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
}
@ -1860,7 +1860,7 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
} else {
conn->state = BT_CONNECT2;
hci_proto_connect_cfm(conn, 0);
hci_conn_put(conn);
hci_conn_drop(conn);
}
} else {
/* Connection rejected */
@ -1967,14 +1967,14 @@ static void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
} else {
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
} else {
hci_auth_cfm(conn, ev->status);
hci_conn_hold(conn);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_put(conn);
hci_conn_drop(conn);
}
if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
@ -2058,7 +2058,7 @@ static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (ev->status && conn->state == BT_CONNECTED) {
hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
hci_conn_put(conn);
hci_conn_drop(conn);
goto unlock;
}
@ -2067,7 +2067,7 @@ static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
} else
hci_encrypt_cfm(conn, ev->status, ev->encrypt);
}
@ -2142,7 +2142,7 @@ static void hci_remote_features_evt(struct hci_dev *hdev,
if (!hci_outgoing_auth_needed(hdev, conn)) {
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
unlock:
@ -2682,7 +2682,7 @@ static void hci_pin_code_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (conn->state == BT_CONNECTED) {
hci_conn_hold(conn);
conn->disc_timeout = HCI_PAIRING_TIMEOUT;
hci_conn_put(conn);
hci_conn_drop(conn);
}
if (!test_bit(HCI_PAIRABLE, &hdev->dev_flags))
@ -2785,7 +2785,7 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (ev->key_type != HCI_LK_CHANGED_COMBINATION)
conn->key_type = ev->key_type;
hci_conn_put(conn);
hci_conn_drop(conn);
}
if (test_bit(HCI_LINK_KEYS, &hdev->dev_flags))
@ -2954,7 +2954,7 @@ static void hci_remote_ext_features_evt(struct hci_dev *hdev,
if (!hci_outgoing_auth_needed(hdev, conn)) {
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
}
unlock:
@ -3087,7 +3087,7 @@ static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
if (ev->status && conn->state == BT_CONNECTED) {
hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
hci_conn_put(conn);
hci_conn_drop(conn);
goto unlock;
}
@ -3096,13 +3096,13 @@ static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
} else {
hci_auth_cfm(conn, ev->status);
hci_conn_hold(conn);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_put(conn);
hci_conn_drop(conn);
}
unlock:
@ -3363,7 +3363,7 @@ static void hci_simple_pair_complete_evt(struct hci_dev *hdev,
mgmt_auth_failed(hdev, &conn->dst, conn->type, conn->dst_type,
ev->status);
hci_conn_put(conn);
hci_conn_drop(conn);
unlock:
hci_dev_unlock(hdev);
@ -3451,7 +3451,7 @@ static void hci_phy_link_complete_evt(struct hci_dev *hdev,
hci_conn_hold(hcon);
hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_put(hcon);
hci_conn_drop(hcon);
hci_conn_hold_device(hcon);
hci_conn_add_sysfs(hcon);

6
net/bluetooth/l2cap_core.c
View File

@ -571,7 +571,7 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
chan->conn = NULL;
if (chan->chan_type != L2CAP_CHAN_CONN_FIX_A2MP)
hci_conn_put(conn->hcon);
hci_conn_drop(conn->hcon);
if (mgr && mgr->bredr_chan == chan)
mgr->bredr_chan = NULL;
@ -1697,7 +1697,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
conn = l2cap_conn_add(hcon, 0);
if (!conn) {
hci_conn_put(hcon);
hci_conn_drop(hcon);
err = -ENOMEM;
goto done;
}
@ -1707,7 +1707,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
if (!list_empty(&conn->chan_l)) {
err = -EBUSY;
hci_conn_put(hcon);
hci_conn_drop(hcon);
}
if (err)

6
net/bluetooth/mgmt.c
View File

@ -2131,7 +2131,7 @@ static void pairing_complete(struct pending_cmd *cmd, u8 status)
conn->security_cfm_cb = NULL;
conn->disconn_cfm_cb = NULL;
hci_conn_put(conn);
hci_conn_drop(conn);
mgmt_pending_remove(cmd);
}
@ -2222,7 +2222,7 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
}
if (conn->connect_cfm_cb) {
hci_conn_put(conn);
hci_conn_drop(conn);
err = cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
MGMT_STATUS_BUSY, &rp, sizeof(rp));
goto unlock;
@ -2231,7 +2231,7 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
hci_conn_put(conn);
hci_conn_drop(conn);
goto unlock;
}

6
net/bluetooth/sco.c
View File

@ -185,7 +185,7 @@ static int sco_connect(struct sock *sk)
conn = sco_conn_add(hcon);
if (!conn) {
hci_conn_put(hcon);
hci_conn_drop(hcon);
err = -ENOMEM;
goto done;
}
@ -353,7 +353,7 @@ static void __sco_sock_close(struct sock *sk)
if (sco_pi(sk)->conn->hcon) {
sk->sk_state = BT_DISCONN;
sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
hci_conn_put(sco_pi(sk)->conn->hcon);
hci_conn_drop(sco_pi(sk)->conn->hcon);
sco_pi(sk)->conn->hcon = NULL;
} else
sco_chan_del(sk, ECONNRESET);
@ -882,7 +882,7 @@ static void sco_chan_del(struct sock *sk, int err)
sco_conn_unlock(conn);
if (conn->hcon)
hci_conn_put(conn->hcon);
hci_conn_drop(conn->hcon);
}
sk->sk_state = BT_CLOSED;

2
net/bluetooth/smp.c
View File

@ -522,7 +522,7 @@ void smp_chan_destroy(struct l2cap_conn *conn)
kfree(smp);
conn->smp_chan = NULL;
conn->hcon->smp_conn = NULL;
hci_conn_put(conn->hcon);
hci_conn_drop(conn->hcon);
}
int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)