[RFC v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection

[RFC v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection

[Luiz Augusto von Dentz]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This makes MGMT_OP_LOAD_CONN_PARAM update existing connection by
dectecting the request is just for one connection, parameters already
exists and there is a connection.

Since this is a new behavior the revision is also updated to enable
userspace to detect it.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 include/net/bluetooth/hci_sync.h |  3 ++
 net/bluetooth/hci_sync.c         | 18 ++++++++++++
 net/bluetooth/mgmt.c             | 50 ++++++++++++++++++++++++++++++--
 3 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/include/net/bluetooth/hci_sync.h b/include/net/bluetooth/hci_sync.h
index 6a9d063e9f47..b49057bbdf23 100644
--- a/include/net/bluetooth/hci_sync.h
+++ b/include/net/bluetooth/hci_sync.h
@@ -136,6 +136,7 @@ int hci_suspend_sync(struct hci_dev *hdev);
 int hci_resume_sync(struct hci_dev *hdev);
 
 struct hci_conn;
+struct hci_conn_params;
 
 int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason);
 
@@ -154,3 +155,5 @@ int hci_connect_acl_sync(struct hci_dev *hdev, struct hci_conn *conn);
 int hci_connect_le_sync(struct hci_dev *hdev, struct hci_conn *conn);
 
 int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn);
+int hci_le_conn_update_sync(struct hci_dev *hdev, struct hci_conn *conn,
+			    struct hci_conn_params *params);
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 16daa79b7981..353de476a5cd 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -6711,3 +6711,21 @@ int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn)
 
 	return -ENOENT;
 }
+
+int hci_le_conn_update_sync(struct hci_dev *hdev, struct hci_conn *conn,
+			    struct hci_conn_params *params)
+{
+	struct hci_cp_le_conn_update cp;
+
+	memset(&cp, 0, sizeof(cp));
+	cp.handle		= cpu_to_le16(conn->handle);
+	cp.conn_interval_min	= cpu_to_le16(params->conn_min_interval);
+	cp.conn_interval_max	= cpu_to_le16(params->conn_max_interval);
+	cp.conn_latency		= cpu_to_le16(params->conn_latency);
+	cp.supervision_timeout	= cpu_to_le16(params->supervision_timeout);
+	cp.min_ce_len		= cpu_to_le16(0x0000);
+	cp.max_ce_len		= cpu_to_le16(0x0000);
+
+	return __hci_cmd_sync_status(hdev, HCI_OP_LE_CONN_UPDATE,
+				     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
+}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 80f220b7e19d..20eca8a9c681 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -42,7 +42,7 @@
 #include "aosp.h"
 
 #define MGMT_VERSION	1
-#define MGMT_REVISION	22
+#define MGMT_REVISION	23
 
 static const u16 mgmt_commands[] = {
 	MGMT_OP_READ_INDEX_LIST,
@@ -7813,6 +7813,18 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
 	return err;
 }
 
+static int conn_update_sync(struct hci_dev *hdev, void *data)
+{
+	struct hci_conn_params *params = data;
+	struct hci_conn *conn;
+
+	conn = hci_conn_hash_lookup_le(hdev, &params->addr, params->addr_type);
+	if (!conn)
+		return -ECANCELED;
+
+	return hci_le_conn_update_sync(hdev, conn, params);
+}
+
 static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data,
 			   u16 len)
 {
@@ -7846,13 +7858,15 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data,
 
 	hci_dev_lock(hdev);
 
-	hci_conn_params_clear_disabled(hdev);
+	if (param_count > 1)
+		hci_conn_params_clear_disabled(hdev);
 
 	for (i = 0; i < param_count; i++) {
 		struct mgmt_conn_param *param = &cp->params[i];
 		struct hci_conn_params *hci_param;
 		u16 min, max, latency, timeout;
 		u8 addr_type;
+		bool update;
 
 		bt_dev_dbg(hdev, "Adding %pMR (type %u)", &param->addr.bdaddr,
 			   param->addr.type);
@@ -7879,6 +7893,19 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data,
 			continue;
 		}
 
+		/* Detect when the loading is for an existing parameter then
+		 * attempt to trigger the connection update procedure.
+		 */
+		if (!i && param_count == 1) {
+			hci_param = hci_conn_params_lookup(hdev,
+							   &param->addr.bdaddr,
+							   addr_type);
+			if (hci_param)
+				update = true;
+			else
+				hci_conn_params_clear_disabled(hdev);
+		}
+
 		hci_param = hci_conn_params_add(hdev, &param->addr.bdaddr,
 						addr_type);
 		if (!hci_param) {
@@ -7890,6 +7917,25 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data,
 		hci_param->conn_max_interval = max;
 		hci_param->conn_latency = latency;
 		hci_param->supervision_timeout = timeout;
+
+		/* Check if we need to trigger a connection update */
+		if (update) {
+			struct hci_conn *conn;
+
+			/* Lookup for existing connection as central and check
+			 * if parameters match and if they don't then trigger
+			 * a connection update.
+			 */
+			conn = hci_conn_hash_lookup_le(hdev, &hci_param->addr,
+						       addr_type);
+			if (conn && conn->role == HCI_ROLE_MASTER &&
+			    (conn->le_conn_min_interval != min ||
+			     conn->le_conn_max_interval != max ||
+			     conn->le_conn_latency != latency ||
+			     conn->le_supv_timeout != timeout))
+				hci_cmd_sync_queue(hdev, conn_update_sync,
+						   hci_param, NULL);
+		}
 	}
 
 	hci_dev_unlock(hdev);
-- 
2.45.0

RE: [RFC,v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 4424 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=853198

---Test result---

Test Summary:
CheckPatch                    PASS      15.35 seconds
GitLint                       FAIL      3.38 seconds
SubjectPrefix                 PASS      0.14 seconds
BuildKernel                   PASS      30.21 seconds
CheckAllWarning               PASS      33.04 seconds
CheckSparse                   PASS      38.26 seconds
CheckSmatch                   FAIL      35.13 seconds
BuildKernel32                 PASS      29.09 seconds
TestRunnerSetup               PASS      531.24 seconds
TestRunner_l2cap-tester       FAIL      25.05 seconds
TestRunner_iso-tester         FAIL      37.56 seconds
TestRunner_bnep-tester        PASS      4.77 seconds
TestRunner_mgmt-tester        FAIL      116.77 seconds
TestRunner_rfcomm-tester      PASS      7.49 seconds
TestRunner_sco-tester         FAIL      17.40 seconds
TestRunner_ioctl-tester       PASS      7.76 seconds
TestRunner_mesh-tester        PASS      5.83 seconds
TestRunner_smp-tester         PASS      6.86 seconds
TestRunner_userchan-tester    PASS      4.92 seconds
IncrementalBuild              PASS      28.31 seconds

Details
##############################
Test: GitLint - FAIL
Desc: Run gitlint
Output:
[RFC,v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection

WARNING: I3 - ignore-body-lines: gitlint will be switching from using Python regex 'match' (match beginning) to 'search' (match anywhere) semantics. Please review your ignore-body-lines.regex option accordingly. To remove this warning, set general.regex-style-search=True. More details: https://jorisroovers.github.io/gitlint/configuration/#regex-style-search
1: T1 Title exceeds max length (81>80): "[RFC,v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection"
##############################
Test: CheckSmatch - FAIL
Desc: Run smatch tool with source
Output:

Segmentation fault (core dumped)
make[4]: *** [scripts/Makefile.build:244: net/bluetooth/hci_core.o] Error 139
make[4]: *** Deleting file 'net/bluetooth/hci_core.o'
make[3]: *** [scripts/Makefile.build:485: net/bluetooth] Error 2
make[2]: *** [scripts/Makefile.build:485: net] Error 2
make[2]: *** Waiting for unfinished jobs....
Segmentation fault (core dumped)
make[4]: *** [scripts/Makefile.build:244: drivers/bluetooth/bcm203x.o] Error 139
make[4]: *** Deleting file 'drivers/bluetooth/bcm203x.o'
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [scripts/Makefile.build:485: drivers/bluetooth] Error 2
make[2]: *** [scripts/Makefile.build:485: drivers] Error 2
make[1]: *** [/github/workspace/src/src/Makefile:1919: .] Error 2
make: *** [Makefile:240: __sub-make] Error 2
##############################
Test: TestRunner_l2cap-tester - FAIL
Desc: Run l2cap-tester with test-runner
Output:
Total: 55, Passed: 53 (96.4%), Failed: 2, Not Run: 0

Failed Test Cases
L2CAP BR/EDR Client - TX Timestamping                Timed out    2.329 seconds
L2CAP LE Client - TX Timestamping                    Timed out    2.250 seconds
##############################
Test: TestRunner_iso-tester - FAIL
Desc: Run iso-tester with test-runner
Output:
Total: 122, Passed: 118 (96.7%), Failed: 4, Not Run: 0

Failed Test Cases
ISO Send - TX Timestamping                           Timed out    2.261 seconds
ISO Send - TX Sched Timestamping                     Timed out    1.989 seconds
ISO Send - TX CMSG Timestamping                      Timed out    2.003 seconds
ISO Send - TX No Poll Timestamping                   Failed       0.166 seconds
##############################
Test: TestRunner_mgmt-tester - FAIL
Desc: Run mgmt-tester with test-runner
Output:
Total: 492, Passed: 488 (99.2%), Failed: 2, Not Run: 2

Failed Test Cases
Read Exp Feature - Success (Index None)              Failed       0.081 seconds
LL Privacy - Remove Device 4 (Disable Adv)           Timed out    2.715 seconds
##############################
Test: TestRunner_sco-tester - FAIL
Desc: Run sco-tester with test-runner
Output:
Total: 15, Passed: 14 (93.3%), Failed: 1, Not Run: 0

Failed Test Cases
SCO CVSD Send - TX Timestamping                      Timed out    2.177 seconds


---
Regards,
Linux Bluetooth

Re: [RFC v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Tue, 14 May 2024 13:51:49 -0400 you wrote:
> From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
> 
> This makes MGMT_OP_LOAD_CONN_PARAM update existing connection by
> dectecting the request is just for one connection, parameters already
> exists and there is a connection.
> 
> Since this is a new behavior the revision is also updated to enable
> userspace to detect it.
> 
> [...]

Here is the summary with links:
  - [RFC,v5] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection
    https://git.kernel.org/bluetooth/bluetooth-next/c/831be422f3bb

You are awesome, thank you!
-- 
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