Bluetooth: Enable option to configure Max Transmission value via sockopt

With the sockopt extension we can set a per-channel MaxTx value.

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 ff1466b21580..f9e4da2677af 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -783,6 +783,7 @@ 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->max_tx = l2cap_pi(parent)->max_tx;
                 pi->tx_win = l2cap_pi(parent)->tx_win;
                 pi->sec_level = l2cap_pi(parent)->sec_level;
                 pi->role_switch = l2cap_pi(parent)->role_switch;
@@ -791,6 +792,7 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent)
                 pi->imtu = L2CAP_DEFAULT_MTU;
                 pi->omtu = 0;
                 pi->mode = L2CAP_MODE_BASIC;
+                pi->max_tx = max_transmit;
                 pi->fcs  = L2CAP_FCS_CRC16;
                 pi->tx_win = tx_window;
                 pi->sec_level = BT_SECURITY_LOW;
@@ -1785,6 +1787,7 @@ 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.max_tx   = l2cap_pi(sk)->max_tx;
                 opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
 
                 len = min_t(unsigned int, sizeof(opts), optlen);
@@ -1797,6 +1800,7 @@ 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)->max_tx = opts.max_tx;
                 l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size;
                 break;
 
@@ -1912,6 +1916,7 @@ 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.max_tx   = l2cap_pi(sk)->max_tx;
                 opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
 
                 len = min_t(unsigned int, len, sizeof(opts));
@@ -2331,7 +2336,7 @@ done:
         case L2CAP_MODE_ERTM:
                 rfc.mode            = L2CAP_MODE_ERTM;
                 rfc.txwin_size      = pi->tx_win;
-                rfc.max_transmit    = max_transmit;
+                rfc.max_transmit    = pi->max_tx;
                 rfc.retrans_timeout = 0;
                 rfc.monitor_timeout = 0;
                 rfc.max_pdu_size    = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);