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| author |   Gustavo F. Padovan <padovan@profusion.mobi> | 2010-05-01 16:15:39 -0300 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2010-05-10 09:28:48 +0200 |
| commit | c1b4f43be01c2a363be021485dd18cca33cfab8a (patch) | |
| tree | 3244f14f00eb6a227e52b2a8ddd7063ef0961840 | |
| parent | Bluetooth: Finish implementation for Rec RR (P=1) on ERTM (diff) | |
| download | linux-dev-c1b4f43be01c2a363be021485dd18cca33cfab8a.tar.xz linux-dev-c1b4f43be01c2a363be021485dd18cca33cfab8a.zip | |
Bluetooth: Add timer to Acknowledge I-frames
We ack I-frames on each txWindow/5 I-frames received, but if the sender
stop to send I-frames and it's not a txWindow multiple we can leave some
frames unacked.
So I added a timer to ack I-frames on this case. The timer expires in
200ms.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | include/net/bluetooth/l2cap.h | 4 | ||||
| -rw-r--r-- | net/bluetooth/l2cap.c | 15 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index d9c20c3d6f3d..48f10f46c73d 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -35,6 +35,7 @@ #define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */ #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ #define L2CAP_DEFAULT_MAX_PDU_SIZE 672 +#define L2CAP_DEFAULT_ACK_TO 200 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ @@ -348,6 +349,7 @@ struct l2cap_pinfo { struct timer_list retrans_timer; struct timer_list monitor_timer; + struct timer_list ack_timer; struct sk_buff_head tx_queue; struct sk_buff_head srej_queue; struct srej_list srej_l; @@ -382,6 +384,8 @@ struct l2cap_pinfo { jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); +#define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \ + jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); static inline int l2cap_tx_window_full(struct sock *sk) { diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index f3869857ee9f..03006568f8a1 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -2235,6 +2235,15 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) *ptr += L2CAP_CONF_OPT_SIZE + len; } +static void l2cap_ack_timeout(unsigned long arg) +{ + struct sock *sk = (void *) arg; + + bh_lock_sock(sk); + l2cap_send_ack(l2cap_pi(sk)); + bh_unlock_sock(sk); +} + static inline void l2cap_ertm_init(struct sock *sk) { l2cap_pi(sk)->expected_ack_seq = 0; @@ -2247,6 +2256,8 @@ static inline void l2cap_ertm_init(struct sock *sk) l2cap_retrans_timeout, (unsigned long) sk); setup_timer(&l2cap_pi(sk)->monitor_timer, l2cap_monitor_timeout, (unsigned long) sk); + setup_timer(&l2cap_pi(sk)->ack_timer, + l2cap_ack_timeout, (unsigned long) sk); __skb_queue_head_init(SREJ_QUEUE(sk)); } @@ -2975,6 +2986,7 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd skb_queue_purge(SREJ_QUEUE(sk)); del_timer(&l2cap_pi(sk)->retrans_timer); del_timer(&l2cap_pi(sk)->monitor_timer); + del_timer(&l2cap_pi(sk)->ack_timer); } l2cap_chan_del(sk, ECONNRESET); @@ -3005,6 +3017,7 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd skb_queue_purge(SREJ_QUEUE(sk)); del_timer(&l2cap_pi(sk)->retrans_timer); del_timer(&l2cap_pi(sk)->monitor_timer); + del_timer(&l2cap_pi(sk)->ack_timer); } l2cap_chan_del(sk, 0); @@ -3484,6 +3497,8 @@ expected: if (err < 0) return err; + __mod_ack_timer(); + pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) l2cap_send_ack(pi); |