* [PATCH v3 0/2] LE connection refactoring and fixes @ 2013-10-07 16:59 Andre Guedes 2013-10-07 16:59 ` [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection Andre Guedes 2013-10-07 16:59 ` [PATCH v3 2/2] Bluetooth: Refactor hci_connect_le Andre Guedes 0 siblings, 2 replies; 6+ messages in thread From: Andre Guedes @ 2013-10-07 16:59 UTC (permalink / raw) To: linux-bluetooth Hi all, This v3 implements Marcel's comments from the previous patchset. It is rebased on top of current bluetooth-next tree. Regards, Andre Andre Guedes (2): Bluetooth: Use HCI request for LE connection Bluetooth: Refactor hci_connect_le include/net/bluetooth/hci_core.h | 2 ++ net/bluetooth/hci_conn.c | 75 +++++++++++++++++++--------------------- net/bluetooth/hci_core.c | 55 +++++++++++++++++++++++++++++ net/bluetooth/hci_event.c | 31 ----------------- 4 files changed, 93 insertions(+), 70 deletions(-) -- 1.8.4 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection 2013-10-07 16:59 [PATCH v3 0/2] LE connection refactoring and fixes Andre Guedes @ 2013-10-07 16:59 ` Andre Guedes 2013-10-07 21:16 ` Marcel Holtmann 2013-10-07 16:59 ` [PATCH v3 2/2] Bluetooth: Refactor hci_connect_le Andre Guedes 1 sibling, 1 reply; 6+ messages in thread From: Andre Guedes @ 2013-10-07 16:59 UTC (permalink / raw) To: linux-bluetooth This patch introduces a new helper, which uses the HCI request framework, for creating LE connectons. All the handling is now done by this function so we can remove the hci_cs_le_create_conn() event handler. This patch also removes the old hci_le_create_connection() since it is not used anymore. Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> --- include/net/bluetooth/hci_core.h | 2 ++ net/bluetooth/hci_conn.c | 30 +++++----------------- net/bluetooth/hci_core.c | 55 ++++++++++++++++++++++++++++++++++++++++ net/bluetooth/hci_event.c | 31 ---------------------- 4 files changed, 63 insertions(+), 55 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index c065527..6ac542c 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -1188,6 +1188,8 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], u8 bdaddr_to_le(u8 bdaddr_type); +int hci_create_le_conn(struct hci_dev *hdev, bdaddr_t *addr, u8 type); + #define SCO_AIRMODE_MASK 0x0003 #define SCO_AIRMODE_CVSD 0x0000 #define SCO_AIRMODE_TRANSP 0x0003 diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index 2a220a8..31f6712 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -49,29 +49,6 @@ static const struct sco_param sco_param_wideband[] = { { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ }; -static void hci_le_create_connection(struct hci_conn *conn) -{ - struct hci_dev *hdev = conn->hdev; - struct hci_cp_le_create_conn cp; - - memset(&cp, 0, sizeof(cp)); - cp.scan_interval = __constant_cpu_to_le16(0x0060); - cp.scan_window = __constant_cpu_to_le16(0x0030); - bacpy(&cp.peer_addr, &conn->dst); - cp.peer_addr_type = conn->dst_type; - if (bacmp(&hdev->bdaddr, BDADDR_ANY)) - cp.own_address_type = ADDR_LE_DEV_PUBLIC; - else - cp.own_address_type = ADDR_LE_DEV_RANDOM; - cp.conn_interval_min = __constant_cpu_to_le16(0x0028); - cp.conn_interval_max = __constant_cpu_to_le16(0x0038); - cp.supervision_timeout = __constant_cpu_to_le16(0x002a); - cp.min_ce_len = __constant_cpu_to_le16(0x0000); - cp.max_ce_len = __constant_cpu_to_le16(0x0000); - - hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); -} - static void hci_le_create_connection_cancel(struct hci_conn *conn) { hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); @@ -549,6 +526,7 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, u8 dst_type, u8 sec_level, u8 auth_type) { struct hci_conn *conn; + int err; if (test_bit(HCI_ADVERTISING, &hdev->flags)) return ERR_PTR(-ENOTSUPP); @@ -569,7 +547,11 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, conn->link_mode |= HCI_LM_MASTER; conn->sec_level = BT_SECURITY_LOW; - hci_le_create_connection(conn); + err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); + if (err) { + hci_conn_del(conn); + return ERR_PTR(err); + } } conn->pending_sec_level = sec_level; diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 0c636ba..8cd8486 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -3702,3 +3702,58 @@ u8 bdaddr_to_le(u8 bdaddr_type) return ADDR_LE_DEV_RANDOM; } } + +static void create_le_conn_complete(struct hci_dev *hdev, u8 status) +{ + struct hci_conn *conn; + + if (status == 0) + return; + + BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", + status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); + if (!conn) + goto done; + + conn->state = BT_CLOSED; + + mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, + status); + + hci_proto_connect_cfm(conn, status); + + hci_conn_del(conn); + +done: + hci_dev_unlock(hdev); +} + +int hci_create_le_conn(struct hci_dev *hdev, bdaddr_t *addr, u8 type) +{ + struct hci_cp_le_create_conn cp; + struct hci_request req; + + hci_req_init(&req, hdev); + + memset(&cp, 0, sizeof(cp)); + cp.scan_interval = __constant_cpu_to_le16(0x0060); + cp.scan_window = __constant_cpu_to_le16(0x0030); + bacpy(&cp.peer_addr, addr); + cp.peer_addr_type = type; + if (bacmp(&hdev->bdaddr, BDADDR_ANY)) + cp.own_address_type = ADDR_LE_DEV_PUBLIC; + else + cp.own_address_type = ADDR_LE_DEV_RANDOM; + cp.conn_interval_min = __constant_cpu_to_le16(0x0028); + cp.conn_interval_max = __constant_cpu_to_le16(0x0038); + cp.supervision_timeout = __constant_cpu_to_le16(0x002a); + cp.min_ce_len = __constant_cpu_to_le16(0x0000); + cp.max_ce_len = __constant_cpu_to_le16(0x0000); + hci_req_add(&req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); + + return hci_req_run(&req, create_le_conn_complete); +} diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 224210c..655d5ca 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -1470,33 +1470,6 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status) hci_dev_unlock(hdev); } -static void hci_cs_le_create_conn(struct hci_dev *hdev, __u8 status) -{ - struct hci_conn *conn; - - BT_DBG("%s status 0x%2.2x", hdev->name, status); - - if (status) { - hci_dev_lock(hdev); - - conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); - if (!conn) { - hci_dev_unlock(hdev); - return; - } - - BT_DBG("%s bdaddr %pMR conn %p", hdev->name, &conn->dst, conn); - - conn->state = BT_CLOSED; - mgmt_connect_failed(hdev, &conn->dst, conn->type, - conn->dst_type, status); - hci_proto_connect_cfm(conn, status); - hci_conn_del(conn); - - hci_dev_unlock(hdev); - } -} - static void hci_cs_create_phylink(struct hci_dev *hdev, u8 status) { struct hci_cp_create_phy_link *cp; @@ -2362,10 +2335,6 @@ static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb) hci_cs_disconnect(hdev, ev->status); break; - case HCI_OP_LE_CREATE_CONN: - hci_cs_le_create_conn(hdev, ev->status); - break; - case HCI_OP_CREATE_PHY_LINK: hci_cs_create_phylink(hdev, ev->status); break; -- 1.8.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection 2013-10-07 16:59 ` [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection Andre Guedes @ 2013-10-07 21:16 ` Marcel Holtmann 2013-10-07 21:45 ` Andre Guedes 0 siblings, 1 reply; 6+ messages in thread From: Marcel Holtmann @ 2013-10-07 21:16 UTC (permalink / raw) To: Andre Guedes; +Cc: linux-bluetooth Hi Andre, > This patch introduces a new helper, which uses the HCI request > framework, for creating LE connectons. All the handling is now > done by this function so we can remove the hci_cs_le_create_conn() > event handler. > > This patch also removes the old hci_le_create_connection() since > it is not used anymore. > > Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> > --- > include/net/bluetooth/hci_core.h | 2 ++ > net/bluetooth/hci_conn.c | 30 +++++----------------- > net/bluetooth/hci_core.c | 55 ++++++++++++++++++++++++++++++++++++++++ > net/bluetooth/hci_event.c | 31 ---------------------- > 4 files changed, 63 insertions(+), 55 deletions(-) > > diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h > index c065527..6ac542c 100644 > --- a/include/net/bluetooth/hci_core.h > +++ b/include/net/bluetooth/hci_core.h > @@ -1188,6 +1188,8 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], > > u8 bdaddr_to_le(u8 bdaddr_type); > > +int hci_create_le_conn(struct hci_dev *hdev, bdaddr_t *addr, u8 type); > + > #define SCO_AIRMODE_MASK 0x0003 > #define SCO_AIRMODE_CVSD 0x0000 > #define SCO_AIRMODE_TRANSP 0x0003 > diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c > index 2a220a8..31f6712 100644 > --- a/net/bluetooth/hci_conn.c > +++ b/net/bluetooth/hci_conn.c > @@ -49,29 +49,6 @@ static const struct sco_param sco_param_wideband[] = { > { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ > }; > > -static void hci_le_create_connection(struct hci_conn *conn) > -{ > - struct hci_dev *hdev = conn->hdev; > - struct hci_cp_le_create_conn cp; > - > - memset(&cp, 0, sizeof(cp)); > - cp.scan_interval = __constant_cpu_to_le16(0x0060); > - cp.scan_window = __constant_cpu_to_le16(0x0030); > - bacpy(&cp.peer_addr, &conn->dst); > - cp.peer_addr_type = conn->dst_type; > - if (bacmp(&hdev->bdaddr, BDADDR_ANY)) > - cp.own_address_type = ADDR_LE_DEV_PUBLIC; > - else > - cp.own_address_type = ADDR_LE_DEV_RANDOM; > - cp.conn_interval_min = __constant_cpu_to_le16(0x0028); > - cp.conn_interval_max = __constant_cpu_to_le16(0x0038); > - cp.supervision_timeout = __constant_cpu_to_le16(0x002a); > - cp.min_ce_len = __constant_cpu_to_le16(0x0000); > - cp.max_ce_len = __constant_cpu_to_le16(0x0000); > - > - hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); > -} > - > static void hci_le_create_connection_cancel(struct hci_conn *conn) > { > hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); > @@ -549,6 +526,7 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, > u8 dst_type, u8 sec_level, u8 auth_type) > { > struct hci_conn *conn; > + int err; > > if (test_bit(HCI_ADVERTISING, &hdev->flags)) > return ERR_PTR(-ENOTSUPP); > @@ -569,7 +547,11 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, > conn->link_mode |= HCI_LM_MASTER; > conn->sec_level = BT_SECURITY_LOW; > > - hci_le_create_connection(conn); > + err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); > + if (err) { > + hci_conn_del(conn); > + return ERR_PTR(err); > + } I am wondering why we do not keep the void function here and handle the error directly in hci_create_le_conn. Any reason why you are doing it this way? Regards Marcel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection 2013-10-07 21:16 ` Marcel Holtmann @ 2013-10-07 21:45 ` Andre Guedes 2013-10-07 22:13 ` Marcel Holtmann 0 siblings, 1 reply; 6+ messages in thread From: Andre Guedes @ 2013-10-07 21:45 UTC (permalink / raw) To: Marcel Holtmann; +Cc: linux-bluetooth Hi Marcel, On 10/07/2013 06:16 PM, Marcel Holtmann wrote: > Hi Andre, > >> This patch introduces a new helper, which uses the HCI request >> framework, for creating LE connectons. All the handling is now >> done by this function so we can remove the hci_cs_le_create_conn() >> event handler. >> >> This patch also removes the old hci_le_create_connection() since >> it is not used anymore. >> >> Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> >> --- >> include/net/bluetooth/hci_core.h | 2 ++ >> net/bluetooth/hci_conn.c | 30 +++++----------------- >> net/bluetooth/hci_core.c | 55 ++++++++++++++++++++++++++++++++++++++++ >> net/bluetooth/hci_event.c | 31 ---------------------- >> 4 files changed, 63 insertions(+), 55 deletions(-) >> >> diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h >> index c065527..6ac542c 100644 >> --- a/include/net/bluetooth/hci_core.h >> +++ b/include/net/bluetooth/hci_core.h >> @@ -1188,6 +1188,8 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], >> >> u8 bdaddr_to_le(u8 bdaddr_type); >> >> +int hci_create_le_conn(struct hci_dev *hdev, bdaddr_t *addr, u8 type); >> + >> #define SCO_AIRMODE_MASK 0x0003 >> #define SCO_AIRMODE_CVSD 0x0000 >> #define SCO_AIRMODE_TRANSP 0x0003 >> diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c >> index 2a220a8..31f6712 100644 >> --- a/net/bluetooth/hci_conn.c >> +++ b/net/bluetooth/hci_conn.c >> @@ -49,29 +49,6 @@ static const struct sco_param sco_param_wideband[] = { >> { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ >> }; >> >> -static void hci_le_create_connection(struct hci_conn *conn) >> -{ >> - struct hci_dev *hdev = conn->hdev; >> - struct hci_cp_le_create_conn cp; >> - >> - memset(&cp, 0, sizeof(cp)); >> - cp.scan_interval = __constant_cpu_to_le16(0x0060); >> - cp.scan_window = __constant_cpu_to_le16(0x0030); >> - bacpy(&cp.peer_addr, &conn->dst); >> - cp.peer_addr_type = conn->dst_type; >> - if (bacmp(&hdev->bdaddr, BDADDR_ANY)) >> - cp.own_address_type = ADDR_LE_DEV_PUBLIC; >> - else >> - cp.own_address_type = ADDR_LE_DEV_RANDOM; >> - cp.conn_interval_min = __constant_cpu_to_le16(0x0028); >> - cp.conn_interval_max = __constant_cpu_to_le16(0x0038); >> - cp.supervision_timeout = __constant_cpu_to_le16(0x002a); >> - cp.min_ce_len = __constant_cpu_to_le16(0x0000); >> - cp.max_ce_len = __constant_cpu_to_le16(0x0000); >> - >> - hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); >> -} >> - >> static void hci_le_create_connection_cancel(struct hci_conn *conn) >> { >> hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); >> @@ -549,6 +526,7 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, >> u8 dst_type, u8 sec_level, u8 auth_type) >> { >> struct hci_conn *conn; >> + int err; >> >> if (test_bit(HCI_ADVERTISING, &hdev->flags)) >> return ERR_PTR(-ENOTSUPP); >> @@ -569,7 +547,11 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, >> conn->link_mode |= HCI_LM_MASTER; >> conn->sec_level = BT_SECURITY_LOW; >> >> - hci_le_create_connection(conn); >> + err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); >> + if (err) { >> + hci_conn_del(conn); >> + return ERR_PTR(err); >> + } > > I am wondering why we do not keep the void function here and handle the error directly in hci_create_le_conn. > > Any reason why you are doing it this way? Yes, hci_create_le_conn() may return error if hci_req_run() returns error (e.g. ENOMEM). For that case, we have to destroy the hci_conn object created by hci_conn_add() otherwise this object will leak. Besides, if the HCI command could not be sent to controller we should notify the caller about this (e.g. connect() returns error to the user or MGMT_OP_PAIR_DEVICE completes with error) Regards, Andre ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection 2013-10-07 21:45 ` Andre Guedes @ 2013-10-07 22:13 ` Marcel Holtmann 0 siblings, 0 replies; 6+ messages in thread From: Marcel Holtmann @ 2013-10-07 22:13 UTC (permalink / raw) To: Andre Guedes; +Cc: linux-bluetooth Hi Andre, >>> This patch introduces a new helper, which uses the HCI request >>> framework, for creating LE connectons. All the handling is now >>> done by this function so we can remove the hci_cs_le_create_conn() >>> event handler. >>> >>> This patch also removes the old hci_le_create_connection() since >>> it is not used anymore. >>> >>> Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> >>> --- >>> include/net/bluetooth/hci_core.h | 2 ++ >>> net/bluetooth/hci_conn.c | 30 +++++----------------- >>> net/bluetooth/hci_core.c | 55 ++++++++++++++++++++++++++++++++++++++++ >>> net/bluetooth/hci_event.c | 31 ---------------------- >>> 4 files changed, 63 insertions(+), 55 deletions(-) >>> >>> diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h >>> index c065527..6ac542c 100644 >>> --- a/include/net/bluetooth/hci_core.h >>> +++ b/include/net/bluetooth/hci_core.h >>> @@ -1188,6 +1188,8 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], >>> >>> u8 bdaddr_to_le(u8 bdaddr_type); >>> >>> +int hci_create_le_conn(struct hci_dev *hdev, bdaddr_t *addr, u8 type); >>> + >>> #define SCO_AIRMODE_MASK 0x0003 >>> #define SCO_AIRMODE_CVSD 0x0000 >>> #define SCO_AIRMODE_TRANSP 0x0003 >>> diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c >>> index 2a220a8..31f6712 100644 >>> --- a/net/bluetooth/hci_conn.c >>> +++ b/net/bluetooth/hci_conn.c >>> @@ -49,29 +49,6 @@ static const struct sco_param sco_param_wideband[] = { >>> { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ >>> }; >>> >>> -static void hci_le_create_connection(struct hci_conn *conn) >>> -{ >>> - struct hci_dev *hdev = conn->hdev; >>> - struct hci_cp_le_create_conn cp; >>> - >>> - memset(&cp, 0, sizeof(cp)); >>> - cp.scan_interval = __constant_cpu_to_le16(0x0060); >>> - cp.scan_window = __constant_cpu_to_le16(0x0030); >>> - bacpy(&cp.peer_addr, &conn->dst); >>> - cp.peer_addr_type = conn->dst_type; >>> - if (bacmp(&hdev->bdaddr, BDADDR_ANY)) >>> - cp.own_address_type = ADDR_LE_DEV_PUBLIC; >>> - else >>> - cp.own_address_type = ADDR_LE_DEV_RANDOM; >>> - cp.conn_interval_min = __constant_cpu_to_le16(0x0028); >>> - cp.conn_interval_max = __constant_cpu_to_le16(0x0038); >>> - cp.supervision_timeout = __constant_cpu_to_le16(0x002a); >>> - cp.min_ce_len = __constant_cpu_to_le16(0x0000); >>> - cp.max_ce_len = __constant_cpu_to_le16(0x0000); >>> - >>> - hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); >>> -} >>> - >>> static void hci_le_create_connection_cancel(struct hci_conn *conn) >>> { >>> hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); >>> @@ -549,6 +526,7 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, >>> u8 dst_type, u8 sec_level, u8 auth_type) >>> { >>> struct hci_conn *conn; >>> + int err; >>> >>> if (test_bit(HCI_ADVERTISING, &hdev->flags)) >>> return ERR_PTR(-ENOTSUPP); >>> @@ -569,7 +547,11 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, >>> conn->link_mode |= HCI_LM_MASTER; >>> conn->sec_level = BT_SECURITY_LOW; >>> >>> - hci_le_create_connection(conn); >>> + err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); >>> + if (err) { >>> + hci_conn_del(conn); >>> + return ERR_PTR(err); >>> + } >> >> I am wondering why we do not keep the void function here and handle the error directly in hci_create_le_conn. >> >> Any reason why you are doing it this way? > > Yes, hci_create_le_conn() may return error if hci_req_run() returns error (e.g. ENOMEM). For that case, we have to destroy the hci_conn object created by hci_conn_add() otherwise this object will leak. Besides, if the HCI command could not be sent to controller we should notify the caller about this (e.g. connect() returns error to the user or MGMT_OP_PAIR_DEVICE completes with error) you are not answering my question. Why is the error handling not done directly in hci_create_le_conn? Do it where hci_req_run fails and not some other place. Regards Marcel ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 2/2] Bluetooth: Refactor hci_connect_le 2013-10-07 16:59 [PATCH v3 0/2] LE connection refactoring and fixes Andre Guedes 2013-10-07 16:59 ` [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection Andre Guedes @ 2013-10-07 16:59 ` Andre Guedes 1 sibling, 0 replies; 6+ messages in thread From: Andre Guedes @ 2013-10-07 16:59 UTC (permalink / raw) To: linux-bluetooth This patch does some code refactoring in hci_connect_le() by moving the exception code into if statements and letting the main flow in first level of function scope. It also adds extra comments to improve the code readability. Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> --- net/bluetooth/hci_conn.c | 55 ++++++++++++++++++++++++++++++------------------ 1 file changed, 35 insertions(+), 20 deletions(-) diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index 31f6712..de211ca 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -531,34 +531,49 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, if (test_bit(HCI_ADVERTISING, &hdev->flags)) return ERR_PTR(-ENOTSUPP); + /* Some devices send ATT messages as soon as the physical link is + * established. To be able to handle these ATT messages, the user- + * space first establishes the connection and then starts the pairing + * process. + * + * So if a hci_conn object already exists for the following connection + * attempt, we simply update pending_sec_level and auth_type fields + * and return the object found. + */ conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); - if (!conn) { - conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); - if (conn) - return ERR_PTR(-EBUSY); - - conn = hci_conn_add(hdev, LE_LINK, dst); - if (!conn) - return ERR_PTR(-ENOMEM); + if (conn) { + conn->pending_sec_level = sec_level; + conn->auth_type = auth_type; + goto done; + } - conn->dst_type = bdaddr_to_le(dst_type); - conn->state = BT_CONNECT; - conn->out = true; - conn->link_mode |= HCI_LM_MASTER; - conn->sec_level = BT_SECURITY_LOW; + /* Since the controller supports only one LE connection attempt at a + * time, we return -EBUSY if there is any connection attempt running. + */ + conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); + if (conn) + return ERR_PTR(-EBUSY); - err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); - if (err) { - hci_conn_del(conn); - return ERR_PTR(err); - } - } + conn = hci_conn_add(hdev, LE_LINK, dst); + if (!conn) + return ERR_PTR(-ENOMEM); + conn->dst_type = bdaddr_to_le(dst_type); + conn->state = BT_CONNECT; + conn->out = true; + conn->link_mode |= HCI_LM_MASTER; + conn->sec_level = BT_SECURITY_LOW; conn->pending_sec_level = sec_level; conn->auth_type = auth_type; - hci_conn_hold(conn); + err = hci_create_le_conn(hdev, &conn->dst, conn->dst_type); + if (err) { + hci_conn_del(conn); + return ERR_PTR(err); + } +done: + hci_conn_hold(conn); return conn; } -- 1.8.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-10-07 22:13 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2013-10-07 16:59 [PATCH v3 0/2] LE connection refactoring and fixes Andre Guedes 2013-10-07 16:59 ` [PATCH v3 1/2] Bluetooth: Use HCI request for LE connection Andre Guedes 2013-10-07 21:16 ` Marcel Holtmann 2013-10-07 21:45 ` Andre Guedes 2013-10-07 22:13 ` Marcel Holtmann 2013-10-07 16:59 ` [PATCH v3 2/2] Bluetooth: Refactor hci_connect_le Andre Guedes
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