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authorLuiz Augusto von Dentz <luiz.von.dentz@intel.com>2020-03-03 01:56:21 +0100
committerMarcel Holtmann <marcel@holtmann.org>2020-03-08 10:05:40 +0100
commit4be5ca67d59d707a4b1c8608ca230ad65aa4f232 (patch)
treeabb21e7d04d81ed044856f5de91008af18821a9a /net
parentBluetooth: L2CAP: Add initial code for Enhanced Credit Based Mode (diff)
downloadlinux-4be5ca67d59d707a4b1c8608ca230ad65aa4f232.tar.xz
linux-4be5ca67d59d707a4b1c8608ca230ad65aa4f232.zip
Bluetooth: L2CAP: Add module option to enable ECRED mode
This should make it safe to have the code upstream without affecting stable systems since there are a few details not sort out with ECRED mode e.g: how to initiate multiple connections at once. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/l2cap_core.c15
-rw-r--r--net/bluetooth/l2cap_sock.c5
2 files changed, 20 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 6b24db77b5df..697c0f7f2c1a 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -45,6 +45,7 @@
#define LE_FLOWCTL_MAX_CREDITS 65535
bool disable_ertm;
+bool enable_ecred;
static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN | L2CAP_FEAT_UCD;
@@ -5849,6 +5850,9 @@ static inline int l2cap_ecred_conn_req(struct l2cap_conn *conn,
int i, num_scid;
bool defer = false;
+ if (!enable_ecred)
+ return -EINVAL;
+
if (cmd_len < sizeof(*req) || cmd_len - sizeof(*req) % sizeof(u16)) {
result = L2CAP_CR_LE_INVALID_PARAMS;
goto response;
@@ -6092,6 +6096,9 @@ static inline int l2cap_ecred_reconf_req(struct l2cap_conn *conn,
struct l2cap_chan *chan;
int i, num_scid;
+ if (!enable_ecred)
+ return -EINVAL;
+
if (cmd_len < sizeof(*req) || cmd_len - sizeof(*req) % sizeof(u16)) {
result = L2CAP_CR_LE_INVALID_PARAMS;
goto respond;
@@ -7723,7 +7730,12 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
case L2CAP_MODE_BASIC:
break;
case L2CAP_MODE_LE_FLOWCTL:
+ break;
case L2CAP_MODE_EXT_FLOWCTL:
+ if (!enable_ecred) {
+ err = -EOPNOTSUPP;
+ goto done;
+ }
break;
case L2CAP_MODE_ERTM:
case L2CAP_MODE_STREAMING:
@@ -8301,3 +8313,6 @@ void l2cap_exit(void)
module_param(disable_ertm, bool, 0644);
MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode");
+
+module_param(enable_ecred, bool, 0644);
+MODULE_PARM_DESC(enable_ecred, "Enable enhanced credit flow control mode");
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 44114db219e1..0c636be3469e 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -273,7 +273,12 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
switch (chan->mode) {
case L2CAP_MODE_BASIC:
case L2CAP_MODE_LE_FLOWCTL:
+ break;
case L2CAP_MODE_EXT_FLOWCTL:
+ if (!enable_ecred) {
+ err = -EOPNOTSUPP;
+ goto done;
+ }
break;
case L2CAP_MODE_ERTM:
case L2CAP_MODE_STREAMING: