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Bluetooth: Remove l2cap_sk_list
A new list was added to replace the socket based one. This new list doesn't depent on sock and then fits better inside l2cap_core.c code. It also rename l2cap_chan_alloc() to l2cap_chan_create() and l2cap_chan_free() to l2cap_chan_destroy) Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Gustavo F. Padovan
parent
73b2ec1853
commit
23691d75cd
@ -350,6 +350,7 @@ struct l2cap_chan {
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struct list_head srej_l;
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struct list_head list;
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struct list_head global_l;
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};
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struct l2cap_conn {
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@ -441,7 +442,6 @@ static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
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#define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
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extern int disable_ertm;
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extern struct bt_sock_list l2cap_sk_list;
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int l2cap_init_sockets(void);
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void l2cap_cleanup_sockets(void);
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@ -469,9 +469,9 @@ void l2cap_sock_init(struct sock *sk, struct sock *parent);
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struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
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int proto, gfp_t prio);
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void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *chan, int err);
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struct l2cap_chan *l2cap_chan_alloc(struct sock *sk);
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struct l2cap_chan *l2cap_chan_create(struct sock *sk);
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void l2cap_chan_del(struct l2cap_chan *chan, int err);
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void l2cap_chan_free(struct l2cap_chan *chan);
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void l2cap_chan_destroy(struct l2cap_chan *chan);
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int l2cap_chan_connect(struct l2cap_chan *chan);
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#endif /* __L2CAP_H */
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@ -62,9 +62,8 @@ static u8 l2cap_fixed_chan[8] = { 0x02, };
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static struct workqueue_struct *_busy_wq;
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struct bt_sock_list l2cap_sk_list = {
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.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
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};
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LIST_HEAD(chan_list);
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DEFINE_RWLOCK(chan_list_lock);
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static void l2cap_busy_work(struct work_struct *work);
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@ -135,29 +134,27 @@ static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn
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return c;
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}
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static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src)
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static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src)
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{
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struct sock *sk;
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struct hlist_node *node;
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sk_for_each(sk, node, &l2cap_sk_list.head) {
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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struct l2cap_chan *c;
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if (chan->sport == psm && !bacmp(&bt_sk(sk)->src, src))
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list_for_each_entry(c, &chan_list, global_l) {
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if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src))
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goto found;
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}
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sk = NULL;
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c = NULL;
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found:
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return sk;
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return c;
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}
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int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
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{
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int err;
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write_lock_bh(&l2cap_sk_list.lock);
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write_lock_bh(&chan_list_lock);
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if (psm && __l2cap_get_sock_by_addr(psm, src)) {
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if (psm && __l2cap_global_chan_by_addr(psm, src)) {
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err = -EADDRINUSE;
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goto done;
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}
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@ -171,7 +168,7 @@ int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
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err = -EINVAL;
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for (p = 0x1001; p < 0x1100; p += 2)
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if (!__l2cap_get_sock_by_addr(cpu_to_le16(p), src)) {
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if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) {
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chan->psm = cpu_to_le16(p);
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chan->sport = cpu_to_le16(p);
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err = 0;
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@ -180,17 +177,17 @@ int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
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}
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done:
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write_unlock_bh(&l2cap_sk_list.lock);
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write_unlock_bh(&chan_list_lock);
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return err;
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}
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int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid)
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{
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write_lock_bh(&l2cap_sk_list.lock);
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write_lock_bh(&chan_list_lock);
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chan->scid = scid;
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write_unlock_bh(&l2cap_sk_list.lock);
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write_unlock_bh(&chan_list_lock);
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return 0;
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}
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@ -207,7 +204,7 @@ static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
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return 0;
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}
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struct l2cap_chan *l2cap_chan_alloc(struct sock *sk)
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struct l2cap_chan *l2cap_chan_create(struct sock *sk)
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{
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struct l2cap_chan *chan;
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@ -217,11 +214,19 @@ struct l2cap_chan *l2cap_chan_alloc(struct sock *sk)
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chan->sk = sk;
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write_lock_bh(&chan_list_lock);
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list_add(&chan->global_l, &chan_list);
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write_unlock_bh(&chan_list_lock);
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return chan;
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}
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void l2cap_chan_free(struct l2cap_chan *chan)
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void l2cap_chan_destroy(struct l2cap_chan *chan)
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{
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write_lock_bh(&chan_list_lock);
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list_del(&chan->global_l);
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write_unlock_bh(&chan_list_lock);
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kfree(chan);
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}
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@ -651,48 +656,51 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
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/* Find socket with cid and source bdaddr.
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* Returns closest match, locked.
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*/
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static struct sock *l2cap_get_sock_by_scid(int state, __le16 cid, bdaddr_t *src)
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static struct l2cap_chan *l2cap_global_chan_by_scid(int state, __le16 cid, bdaddr_t *src)
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{
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struct sock *sk = NULL, *sk1 = NULL;
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struct hlist_node *node;
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struct l2cap_chan *c, *c1 = NULL;
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read_lock(&l2cap_sk_list.lock);
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read_lock(&chan_list_lock);
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sk_for_each(sk, node, &l2cap_sk_list.head) {
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (state && sk->sk_state != state)
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continue;
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if (chan->scid == cid) {
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if (c->scid == cid) {
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/* Exact match. */
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if (!bacmp(&bt_sk(sk)->src, src))
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break;
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if (!bacmp(&bt_sk(sk)->src, src)) {
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read_unlock(&chan_list_lock);
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return c;
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}
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/* Closest match */
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if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
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sk1 = sk;
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c1 = c;
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}
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}
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read_unlock(&l2cap_sk_list.lock);
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read_unlock(&chan_list_lock);
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return node ? sk : sk1;
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return c1;
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}
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static void l2cap_le_conn_ready(struct l2cap_conn *conn)
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{
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struct sock *parent, *sk;
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struct l2cap_chan *chan;
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struct l2cap_chan *chan, *pchan;
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BT_DBG("");
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/* Check if we have socket listening on cid */
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parent = l2cap_get_sock_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA,
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pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA,
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conn->src);
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if (!parent)
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if (!pchan)
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return;
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parent = pchan->sk;
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bh_lock_sock(parent);
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/* Check for backlog size */
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@ -705,7 +713,7 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
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if (!sk)
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goto clean;
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chan = l2cap_chan_alloc(sk);
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chan = l2cap_chan_create(sk);
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if (!chan) {
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l2cap_sock_kill(sk);
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goto clean;
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@ -883,33 +891,34 @@ static inline void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *ch
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/* Find socket with psm and source bdaddr.
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* Returns closest match.
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*/
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static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
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static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr_t *src)
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{
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struct sock *sk = NULL, *sk1 = NULL;
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struct hlist_node *node;
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struct l2cap_chan *c, *c1 = NULL;
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read_lock(&l2cap_sk_list.lock);
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read_lock(&chan_list_lock);
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sk_for_each(sk, node, &l2cap_sk_list.head) {
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (state && sk->sk_state != state)
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continue;
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if (chan->psm == psm) {
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if (c->psm == psm) {
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/* Exact match. */
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if (!bacmp(&bt_sk(sk)->src, src))
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break;
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if (!bacmp(&bt_sk(sk)->src, src)) {
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read_unlock_bh(&chan_list_lock);
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return c;
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}
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/* Closest match */
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if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
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sk1 = sk;
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c1 = c;
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}
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}
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read_unlock(&l2cap_sk_list.lock);
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read_unlock(&chan_list_lock);
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return node ? sk : sk1;
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return c1;
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}
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int l2cap_chan_connect(struct l2cap_chan *chan)
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@ -2079,22 +2088,26 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
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{
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struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
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struct l2cap_conn_rsp rsp;
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struct l2cap_chan *chan = NULL;
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struct l2cap_chan *chan = NULL, *pchan;
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struct sock *parent, *sk = NULL;
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int result, status = L2CAP_CS_NO_INFO;
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u16 dcid = 0, scid = __le16_to_cpu(req->scid);
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__le16 psm = req->psm;
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BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid);
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BT_ERR("psm 0x%2.2x scid 0x%4.4x", psm, scid);
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/* Check if we have socket listening on psm */
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parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src);
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if (!parent) {
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pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src);
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if (!pchan) {
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result = L2CAP_CR_BAD_PSM;
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goto sendresp;
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}
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BT_ERR("%p 0x%2.2x", pchan, pchan->psm);
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parent = pchan->sk;
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bh_lock_sock(parent);
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/* Check if the ACL is secure enough (if not SDP) */
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@ -2117,7 +2130,7 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
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if (!sk)
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goto response;
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chan = l2cap_chan_alloc(sk);
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chan = l2cap_chan_create(sk);
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if (!chan) {
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l2cap_sock_kill(sk);
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goto response;
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@ -3745,11 +3758,14 @@ done:
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static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb)
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{
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struct sock *sk;
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struct l2cap_chan *chan;
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sk = l2cap_get_sock_by_psm(0, psm, conn->src);
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if (!sk)
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chan = l2cap_global_chan_by_psm(0, psm, conn->src);
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if (!chan)
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goto drop;
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sk = chan->sk;
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bh_lock_sock(sk);
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BT_DBG("sk %p, len %d", sk, skb->len);
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@ -3775,11 +3791,14 @@ done:
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static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb)
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{
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struct sock *sk;
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struct l2cap_chan *chan;
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sk = l2cap_get_sock_by_scid(0, cid, conn->src);
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if (!sk)
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chan = l2cap_global_chan_by_scid(0, cid, conn->src);
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if (!chan)
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goto drop;
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sk = chan->sk;
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bh_lock_sock(sk);
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BT_DBG("sk %p, len %d", sk, skb->len);
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@ -3846,8 +3865,7 @@ static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
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static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
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{
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int exact = 0, lm1 = 0, lm2 = 0;
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register struct sock *sk;
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struct hlist_node *node;
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struct l2cap_chan *c;
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if (type != ACL_LINK)
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return -EINVAL;
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@ -3855,25 +3873,25 @@ static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
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BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
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/* Find listening sockets and check their link_mode */
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read_lock(&l2cap_sk_list.lock);
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sk_for_each(sk, node, &l2cap_sk_list.head) {
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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read_lock(&chan_list_lock);
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (sk->sk_state != BT_LISTEN)
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continue;
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if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) {
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lm1 |= HCI_LM_ACCEPT;
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if (chan->role_switch)
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if (c->role_switch)
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lm1 |= HCI_LM_MASTER;
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exact++;
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} else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) {
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lm2 |= HCI_LM_ACCEPT;
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if (chan->role_switch)
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if (c->role_switch)
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lm2 |= HCI_LM_MASTER;
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}
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}
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read_unlock(&l2cap_sk_list.lock);
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read_unlock(&chan_list_lock);
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return exact ? lm1 : lm2;
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}
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@ -4126,25 +4144,22 @@ drop:
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static int l2cap_debugfs_show(struct seq_file *f, void *p)
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{
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struct sock *sk;
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struct hlist_node *node;
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struct l2cap_chan *c;
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read_lock_bh(&l2cap_sk_list.lock);
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read_lock_bh(&chan_list_lock);
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sk_for_each(sk, node, &l2cap_sk_list.head) {
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struct l2cap_pinfo *pi = l2cap_pi(sk);
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struct l2cap_chan *chan = pi->chan;
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n",
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batostr(&bt_sk(sk)->src),
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batostr(&bt_sk(sk)->dst),
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sk->sk_state, __le16_to_cpu(chan->psm),
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chan->scid, chan->dcid,
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chan->imtu, chan->omtu, chan->sec_level,
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chan->mode);
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sk->sk_state, __le16_to_cpu(c->psm),
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c->scid, c->dcid, c->imtu, c->omtu,
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c->sec_level, c->mode);
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}
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read_unlock_bh(&l2cap_sk_list.lock);
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read_unlock_bh(&chan_list_lock);
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return 0;
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}
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@ -808,8 +808,7 @@ void l2cap_sock_kill(struct sock *sk)
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/* Kill poor orphan */
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l2cap_chan_free(l2cap_pi(sk)->chan);
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bt_sock_unlink(&l2cap_sk_list, sk);
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l2cap_chan_destroy(l2cap_pi(sk)->chan);
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sock_set_flag(sk, SOCK_DEAD);
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sock_put(sk);
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}
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@ -1025,7 +1024,6 @@ struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, g
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setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk);
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||||
|
||||
bt_sock_link(&l2cap_sk_list, sk);
|
||||
return sk;
|
||||
}
|
||||
|
||||
@ -1052,7 +1050,7 @@ static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
|
||||
if (!sk)
|
||||
return -ENOMEM;
|
||||
|
||||
chan = l2cap_chan_alloc(sk);
|
||||
chan = l2cap_chan_create(sk);
|
||||
if (!chan) {
|
||||
l2cap_sock_kill(sk);
|
||||
return -ENOMEM;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user