[v7,1/7] Bluetooth: hci_core: Introduce hci_recv_event_data

Commit Message

Luiz Augusto von Dentz July 14, 2022, 12:22 a.m. UTC

From: Luiz Augusto von Dentz <[e-mail]>

This introduces hci_recv_event_data to make it simpler to access the
contents of last received event rather than having to pass its contents
to the likes of *_ind/*_cfm callbacks.

Signed-off-by: Luiz Augusto von Dentz <[e-mail]>
---
v2: Fixes CI/kernel test robot findings
v3: Fix crash when disabling ISO Socket experimental UUID.
v4: Fix crashes when running iso-tester Defer and Defer Send tests which just
binds the CIS using DEFER_SETUP without attempting to connect it at first.
v5: Fix kbuild findings
v6: Fix checkpatch findings
v7: Fix setting timeout on connect when DEFER_SETUP is used

 include/net/bluetooth/hci_core.h |  2 ++
 net/bluetooth/hci_core.c         | 32 ++++++++++++++++++++++++++++++++
 net/bluetooth/hci_event.c        |  3 +++
 3 files changed, 37 insertions(+)

Comments

[e-mail] July 14, 2022, 3:14 a.m. UTC | #1

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=659500

---Test result---

Test Summary:
CheckPatch                    PASS      1.93 seconds
GitLint                       PASS      0.97 seconds
SubjectPrefix                 PASS      0.84 seconds
BuildKernel                   PASS      31.35 seconds
BuildKernel32                 PASS      27.67 seconds
Incremental Build with patchesPASS      39.54 seconds
TestRunner: Setup             PASS      477.86 seconds
TestRunner: l2cap-tester      PASS      16.80 seconds
TestRunner: bnep-tester       PASS      6.05 seconds
TestRunner: mgmt-tester       PASS      95.02 seconds
TestRunner: rfcomm-tester     PASS      9.15 seconds
TestRunner: sco-tester        PASS      8.96 seconds
TestRunner: smp-tester        PASS      9.08 seconds
TestRunner: userchan-tester   PASS      5.94 seconds



---
Regards,
Linux Bluetooth

[e-mail] July 22, 2022, 8:40 p.m. UTC | #2

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <[e-mail]>:

On Wed, 13 Jul 2022 17:22:17 -0700 you wrote:
> From: Luiz Augusto von Dentz <[e-mail]>
> 
> This introduces hci_recv_event_data to make it simpler to access the
> contents of last received event rather than having to pass its contents
> to the likes of *_ind/*_cfm callbacks.
> 
> Signed-off-by: Luiz Augusto von Dentz <[e-mail]>
> 
> [...]

Here is the summary with links:
  - [v7,1/7] Bluetooth: hci_core: Introduce hci_recv_event_data
    https://git.kernel.org/bluetooth/bluetooth-next/c/dfe6d5c3ec23

You are awesome, thank you!

Patch

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 15237ee5f761..0ce57e1856e5 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -530,6 +530,7 @@  struct hci_dev {
 	struct sk_buff_head	cmd_q;
 
 	struct sk_buff		*sent_cmd;
+	struct sk_buff		*recv_event;
 
 	struct mutex		req_lock;
 	wait_queue_head_t	req_wait_q;
@@ -1755,6 +1756,7 @@  void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
 
 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
+void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
 
 u32 hci_conn_get_phy(struct hci_conn *conn);
 
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 27e90eb4bf4c..baaf2fb969c3 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2742,6 +2742,7 @@  void hci_release_dev(struct hci_dev *hdev)
 
 	ida_simple_remove(&hci_index_ida, hdev->id);
 	kfree_skb(hdev->sent_cmd);
+	kfree_skb(hdev->recv_event);
 	kfree(hdev);
 }
 EXPORT_SYMBOL(hci_release_dev);
@@ -3048,6 +3049,37 @@  void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
 	return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
 }
 
+/* Get data from last received event */
+void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
+{
+	struct hci_event_hdr *hdr;
+	int offset;
+
+	if (!hdev->recv_event)
+		return NULL;
+
+	hdr = (void *)hdev->recv_event->data;
+	offset = sizeof(*hdr);
+
+	if (hdr->evt != event) {
+		/* In case of LE metaevent check the subevent match */
+		if (hdr->evt == HCI_EV_LE_META) {
+			struct hci_ev_le_meta *ev;
+
+			ev = (void *)hdev->recv_event->data + offset;
+			offset += sizeof(*ev);
+			if (ev->subevent == event)
+				goto found;
+		}
+		return NULL;
+	}
+
+found:
+	bt_dev_dbg(hdev, "event 0x%2.2x", event);
+
+	return hdev->recv_event->data + offset;
+}
+
 /* Send ACL data */
 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
 {
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 34bec7446d00..2440275a143c 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -6936,6 +6936,9 @@  void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
 		goto done;
 	}
 
+	kfree_skb(hdev->recv_event);
+	hdev->recv_event = skb_clone(skb, GFP_KERNEL);
+
 	event = hdr->evt;
 	if (!event) {
 		bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",