Bluetooth: Add sockopt configuration for txWindow on L2CAP

Now we can set/get Transmission Window size via sockopt.

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>

1 files changed, 6 insertions, 1 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index c6bc1b9ed657..530079649b43 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -782,6 +782,7 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent)
                 pi->omtu = l2cap_pi(parent)->omtu;
                 pi->mode = l2cap_pi(parent)->mode;
                 pi->fcs  = l2cap_pi(parent)->fcs;
+                pi->tx_win = l2cap_pi(parent)->tx_win;
                 pi->sec_level = l2cap_pi(parent)->sec_level;
                 pi->role_switch = l2cap_pi(parent)->role_switch;
                 pi->force_reliable = l2cap_pi(parent)->force_reliable;
@@ -790,6 +791,7 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent)
                 pi->omtu = 0;
                 pi->mode = L2CAP_MODE_BASIC;
                 pi->fcs  = L2CAP_FCS_CRC16;
+                pi->tx_win = L2CAP_DEFAULT_TX_WINDOW;
                 pi->sec_level = BT_SECURITY_LOW;
                 pi->role_switch = 0;
                 pi->force_reliable = 0;
@@ -1782,6 +1784,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
                 opts.flush_to = l2cap_pi(sk)->flush_to;
                 opts.mode     = l2cap_pi(sk)->mode;
                 opts.fcs      = l2cap_pi(sk)->fcs;
+                opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
 
                 len = min_t(unsigned int, sizeof(opts), optlen);
                 if (copy_from_user((char *) &opts, optval, len)) {
@@ -1793,6 +1796,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
                 l2cap_pi(sk)->omtu = opts.omtu;
                 l2cap_pi(sk)->mode = opts.mode;
                 l2cap_pi(sk)->fcs  = opts.fcs;
+                l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size;
                 break;
 
         case L2CAP_LM:
@@ -1907,6 +1911,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us
                 opts.flush_to = l2cap_pi(sk)->flush_to;
                 opts.mode     = l2cap_pi(sk)->mode;
                 opts.fcs      = l2cap_pi(sk)->fcs;
+                opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
 
                 len = min_t(unsigned int, len, sizeof(opts));
                 if (copy_to_user(optval, (char *) &opts, len))
@@ -2324,7 +2329,7 @@ done:
 
         case L2CAP_MODE_ERTM:
                 rfc.mode            = L2CAP_MODE_ERTM;
-                rfc.txwin_size      = L2CAP_DEFAULT_TX_WINDOW;
+                rfc.txwin_size      = pi->tx_win;
                 rfc.max_transmit    = max_transmit;
                 rfc.retrans_timeout = 0;
                 rfc.monitor_timeout = 0;