forked from Minki/linux
[Bluetooth] Small cleanup of the L2CAP source code
This patch is a small cleanup of the L2CAP source code. It makes some coding style changes and moves some functions around to avoid forward declarations. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann
David S. Miller
parent
a91f2e396f
commit
0139418c94
@ -63,11 +63,6 @@ static struct bt_sock_list l2cap_sk_list = {
|
||||
.lock = RW_LOCK_UNLOCKED
|
||||
};
|
||||
|
||||
static int l2cap_conn_del(struct hci_conn *conn, int err);
|
||||
|
||||
static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent);
|
||||
static void l2cap_chan_del(struct sock *sk, int err);
|
||||
|
||||
static void __l2cap_sock_close(struct sock *sk, int reason);
|
||||
static void l2cap_sock_close(struct sock *sk);
|
||||
static void l2cap_sock_kill(struct sock *sk);
|
||||
@ -109,24 +104,177 @@ static void l2cap_sock_init_timer(struct sock *sk)
|
||||
sk->sk_timer.data = (unsigned long)sk;
|
||||
}
|
||||
|
||||
/* ---- L2CAP channels ---- */
|
||||
static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->dcid == cid)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->scid == cid)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
/* Find channel with given SCID.
|
||||
* Returns locked socket */
|
||||
static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
read_lock(&l->lock);
|
||||
s = __l2cap_get_chan_by_scid(l, cid);
|
||||
if (s) bh_lock_sock(s);
|
||||
read_unlock(&l->lock);
|
||||
return s;
|
||||
}
|
||||
|
||||
static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->ident == ident)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
|
||||
{
|
||||
struct sock *s;
|
||||
read_lock(&l->lock);
|
||||
s = __l2cap_get_chan_by_ident(l, ident);
|
||||
if (s) bh_lock_sock(s);
|
||||
read_unlock(&l->lock);
|
||||
return s;
|
||||
}
|
||||
|
||||
static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
|
||||
{
|
||||
u16 cid = 0x0040;
|
||||
|
||||
for (; cid < 0xffff; cid++) {
|
||||
if(!__l2cap_get_chan_by_scid(l, cid))
|
||||
return cid;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
|
||||
{
|
||||
sock_hold(sk);
|
||||
|
||||
if (l->head)
|
||||
l2cap_pi(l->head)->prev_c = sk;
|
||||
|
||||
l2cap_pi(sk)->next_c = l->head;
|
||||
l2cap_pi(sk)->prev_c = NULL;
|
||||
l->head = sk;
|
||||
}
|
||||
|
||||
static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
|
||||
{
|
||||
struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
|
||||
|
||||
write_lock(&l->lock);
|
||||
if (sk == l->head)
|
||||
l->head = next;
|
||||
|
||||
if (next)
|
||||
l2cap_pi(next)->prev_c = prev;
|
||||
if (prev)
|
||||
l2cap_pi(prev)->next_c = next;
|
||||
write_unlock(&l->lock);
|
||||
|
||||
__sock_put(sk);
|
||||
}
|
||||
|
||||
static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
|
||||
{
|
||||
struct l2cap_chan_list *l = &conn->chan_list;
|
||||
|
||||
BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
|
||||
|
||||
l2cap_pi(sk)->conn = conn;
|
||||
|
||||
if (sk->sk_type == SOCK_SEQPACKET) {
|
||||
/* Alloc CID for connection-oriented socket */
|
||||
l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
|
||||
} else if (sk->sk_type == SOCK_DGRAM) {
|
||||
/* Connectionless socket */
|
||||
l2cap_pi(sk)->scid = 0x0002;
|
||||
l2cap_pi(sk)->dcid = 0x0002;
|
||||
l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
|
||||
} else {
|
||||
/* Raw socket can send/recv signalling messages only */
|
||||
l2cap_pi(sk)->scid = 0x0001;
|
||||
l2cap_pi(sk)->dcid = 0x0001;
|
||||
l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
|
||||
}
|
||||
|
||||
__l2cap_chan_link(l, sk);
|
||||
|
||||
if (parent)
|
||||
bt_accept_enqueue(parent, sk);
|
||||
}
|
||||
|
||||
/* Delete channel.
|
||||
* Must be called on the locked socket. */
|
||||
static void l2cap_chan_del(struct sock *sk, int err)
|
||||
{
|
||||
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
||||
struct sock *parent = bt_sk(sk)->parent;
|
||||
|
||||
l2cap_sock_clear_timer(sk);
|
||||
|
||||
BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
|
||||
|
||||
if (conn) {
|
||||
/* Unlink from channel list */
|
||||
l2cap_chan_unlink(&conn->chan_list, sk);
|
||||
l2cap_pi(sk)->conn = NULL;
|
||||
hci_conn_put(conn->hcon);
|
||||
}
|
||||
|
||||
sk->sk_state = BT_CLOSED;
|
||||
sock_set_flag(sk, SOCK_ZAPPED);
|
||||
|
||||
if (err)
|
||||
sk->sk_err = err;
|
||||
|
||||
if (parent) {
|
||||
bt_accept_unlink(sk);
|
||||
parent->sk_data_ready(parent, 0);
|
||||
} else
|
||||
sk->sk_state_change(sk);
|
||||
}
|
||||
|
||||
/* ---- L2CAP connections ---- */
|
||||
static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
|
||||
{
|
||||
struct l2cap_conn *conn;
|
||||
struct l2cap_conn *conn = hcon->l2cap_data;
|
||||
|
||||
if ((conn = hcon->l2cap_data))
|
||||
if (conn || status)
|
||||
return conn;
|
||||
|
||||
if (status)
|
||||
return conn;
|
||||
|
||||
if (!(conn = kmalloc(sizeof(struct l2cap_conn), GFP_ATOMIC)))
|
||||
conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC);
|
||||
if (!conn)
|
||||
return NULL;
|
||||
memset(conn, 0, sizeof(struct l2cap_conn));
|
||||
|
||||
hcon->l2cap_data = conn;
|
||||
conn->hcon = hcon;
|
||||
|
||||
BT_DBG("hcon %p conn %p", hcon, conn);
|
||||
|
||||
conn->mtu = hcon->hdev->acl_mtu;
|
||||
conn->src = &hcon->hdev->bdaddr;
|
||||
conn->dst = &hcon->dst;
|
||||
@ -134,17 +282,16 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
|
||||
spin_lock_init(&conn->lock);
|
||||
rwlock_init(&conn->chan_list.lock);
|
||||
|
||||
BT_DBG("hcon %p conn %p", hcon, conn);
|
||||
return conn;
|
||||
}
|
||||
|
||||
static int l2cap_conn_del(struct hci_conn *hcon, int err)
|
||||
static void l2cap_conn_del(struct hci_conn *hcon, int err)
|
||||
{
|
||||
struct l2cap_conn *conn;
|
||||
struct l2cap_conn *conn = hcon->l2cap_data;
|
||||
struct sock *sk;
|
||||
|
||||
if (!(conn = hcon->l2cap_data))
|
||||
return 0;
|
||||
if (!conn)
|
||||
return;
|
||||
|
||||
BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
|
||||
|
||||
@ -161,7 +308,6 @@ static int l2cap_conn_del(struct hci_conn *hcon, int err)
|
||||
|
||||
hcon->l2cap_data = NULL;
|
||||
kfree(conn);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
|
||||
@ -925,160 +1071,6 @@ static int l2cap_sock_release(struct socket *sock)
|
||||
return err;
|
||||
}
|
||||
|
||||
/* ---- L2CAP channels ---- */
|
||||
static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->dcid == cid)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->scid == cid)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
/* Find channel with given SCID.
|
||||
* Returns locked socket */
|
||||
static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
|
||||
{
|
||||
struct sock *s;
|
||||
read_lock(&l->lock);
|
||||
s = __l2cap_get_chan_by_scid(l, cid);
|
||||
if (s) bh_lock_sock(s);
|
||||
read_unlock(&l->lock);
|
||||
return s;
|
||||
}
|
||||
|
||||
static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
|
||||
{
|
||||
struct sock *s;
|
||||
for (s = l->head; s; s = l2cap_pi(s)->next_c) {
|
||||
if (l2cap_pi(s)->ident == ident)
|
||||
break;
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
|
||||
{
|
||||
struct sock *s;
|
||||
read_lock(&l->lock);
|
||||
s = __l2cap_get_chan_by_ident(l, ident);
|
||||
if (s) bh_lock_sock(s);
|
||||
read_unlock(&l->lock);
|
||||
return s;
|
||||
}
|
||||
|
||||
static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
|
||||
{
|
||||
u16 cid = 0x0040;
|
||||
|
||||
for (; cid < 0xffff; cid++) {
|
||||
if(!__l2cap_get_chan_by_scid(l, cid))
|
||||
return cid;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
|
||||
{
|
||||
sock_hold(sk);
|
||||
|
||||
if (l->head)
|
||||
l2cap_pi(l->head)->prev_c = sk;
|
||||
|
||||
l2cap_pi(sk)->next_c = l->head;
|
||||
l2cap_pi(sk)->prev_c = NULL;
|
||||
l->head = sk;
|
||||
}
|
||||
|
||||
static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
|
||||
{
|
||||
struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
|
||||
|
||||
write_lock(&l->lock);
|
||||
if (sk == l->head)
|
||||
l->head = next;
|
||||
|
||||
if (next)
|
||||
l2cap_pi(next)->prev_c = prev;
|
||||
if (prev)
|
||||
l2cap_pi(prev)->next_c = next;
|
||||
write_unlock(&l->lock);
|
||||
|
||||
__sock_put(sk);
|
||||
}
|
||||
|
||||
static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
|
||||
{
|
||||
struct l2cap_chan_list *l = &conn->chan_list;
|
||||
|
||||
BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
|
||||
|
||||
l2cap_pi(sk)->conn = conn;
|
||||
|
||||
if (sk->sk_type == SOCK_SEQPACKET) {
|
||||
/* Alloc CID for connection-oriented socket */
|
||||
l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
|
||||
} else if (sk->sk_type == SOCK_DGRAM) {
|
||||
/* Connectionless socket */
|
||||
l2cap_pi(sk)->scid = 0x0002;
|
||||
l2cap_pi(sk)->dcid = 0x0002;
|
||||
l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
|
||||
} else {
|
||||
/* Raw socket can send/recv signalling messages only */
|
||||
l2cap_pi(sk)->scid = 0x0001;
|
||||
l2cap_pi(sk)->dcid = 0x0001;
|
||||
l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
|
||||
}
|
||||
|
||||
__l2cap_chan_link(l, sk);
|
||||
|
||||
if (parent)
|
||||
bt_accept_enqueue(parent, sk);
|
||||
}
|
||||
|
||||
/* Delete channel.
|
||||
* Must be called on the locked socket. */
|
||||
static void l2cap_chan_del(struct sock *sk, int err)
|
||||
{
|
||||
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
||||
struct sock *parent = bt_sk(sk)->parent;
|
||||
|
||||
l2cap_sock_clear_timer(sk);
|
||||
|
||||
BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
|
||||
|
||||
if (conn) {
|
||||
/* Unlink from channel list */
|
||||
l2cap_chan_unlink(&conn->chan_list, sk);
|
||||
l2cap_pi(sk)->conn = NULL;
|
||||
hci_conn_put(conn->hcon);
|
||||
}
|
||||
|
||||
sk->sk_state = BT_CLOSED;
|
||||
sock_set_flag(sk, SOCK_ZAPPED);
|
||||
|
||||
if (err)
|
||||
sk->sk_err = err;
|
||||
|
||||
if (parent) {
|
||||
bt_accept_unlink(sk);
|
||||
parent->sk_data_ready(parent, 0);
|
||||
} else
|
||||
sk->sk_state_change(sk);
|
||||
}
|
||||
|
||||
static void l2cap_conn_ready(struct l2cap_conn *conn)
|
||||
{
|
||||
struct l2cap_chan_list *l = &conn->chan_list;
|
||||
@ -1834,7 +1826,9 @@ drop:
|
||||
kfree_skb(skb);
|
||||
|
||||
done:
|
||||
if (sk) bh_unlock_sock(sk);
|
||||
if (sk)
|
||||
bh_unlock_sock(sk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1925,18 +1919,18 @@ static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
|
||||
|
||||
static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
|
||||
{
|
||||
struct l2cap_conn *conn;
|
||||
|
||||
BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
|
||||
|
||||
if (hcon->type != ACL_LINK)
|
||||
return 0;
|
||||
|
||||
if (!status) {
|
||||
struct l2cap_conn *conn;
|
||||
|
||||
conn = l2cap_conn_add(hcon, status);
|
||||
if (conn)
|
||||
l2cap_conn_ready(conn);
|
||||
} else
|
||||
} else
|
||||
l2cap_conn_del(hcon, bt_err(status));
|
||||
|
||||
return 0;
|
||||
@ -1950,19 +1944,21 @@ static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason)
|
||||
return 0;
|
||||
|
||||
l2cap_conn_del(hcon, bt_err(reason));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
|
||||
{
|
||||
struct l2cap_chan_list *l;
|
||||
struct l2cap_conn *conn;
|
||||
struct l2cap_conn *conn = conn = hcon->l2cap_data;
|
||||
struct l2cap_conn_rsp rsp;
|
||||
struct sock *sk;
|
||||
int result;
|
||||
|
||||
if (!(conn = hcon->l2cap_data))
|
||||
if (!conn)
|
||||
return 0;
|
||||
|
||||
l = &conn->chan_list;
|
||||
|
||||
BT_DBG("conn %p", conn);
|
||||
@ -2005,13 +2001,14 @@ static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
|
||||
static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status)
|
||||
{
|
||||
struct l2cap_chan_list *l;
|
||||
struct l2cap_conn *conn;
|
||||
struct l2cap_conn *conn = hcon->l2cap_data;
|
||||
struct l2cap_conn_rsp rsp;
|
||||
struct sock *sk;
|
||||
int result;
|
||||
|
||||
if (!(conn = hcon->l2cap_data))
|
||||
if (!conn)
|
||||
return 0;
|
||||
|
||||
l = &conn->chan_list;
|
||||
|
||||
BT_DBG("conn %p", conn);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user