Commit ab4e4380 authored by Manish Mandlik's avatar Manish Mandlik Committed by Luiz Augusto von Dentz
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Bluetooth: Add vhci devcoredump support 



Add devcoredump support for vhci that creates forcce_devcoredump debugfs
entry. This is used for mgmt-tester tests.

Signed-off-by: default avatarManish Mandlik <mmandlik@google.com>
Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
parent 9695ef87

drivers/bluetooth/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -363,6 +363,7 @@ config BT_HCIBLUECARD 


config BT_HCIVHCI

	tristate "HCI VHCI (Virtual HCI device) driver"

	select WANT_DEV_COREDUMP

	help

	  Bluetooth Virtual HCI device driver.

	  This driver is required if you want to use HCI Emulation software.

drivers/bluetooth/hci_vhci.c

+97 −0
Original line number Diff line number Diff line
@@ -278,6 +278,100 @@ static int vhci_setup(struct hci_dev *hdev) 
	return 0;

}



static void vhci_coredump(struct hci_dev *hdev)

{

	/* No need to do anything */

}



static void vhci_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)

{

	char buf[80];



	snprintf(buf, sizeof(buf), "Controller Name: vhci_ctrl\n");

	skb_put_data(skb, buf, strlen(buf));



	snprintf(buf, sizeof(buf), "Firmware Version: vhci_fw\n");

	skb_put_data(skb, buf, strlen(buf));



	snprintf(buf, sizeof(buf), "Driver: vhci_drv\n");

	skb_put_data(skb, buf, strlen(buf));



	snprintf(buf, sizeof(buf), "Vendor: vhci\n");

	skb_put_data(skb, buf, strlen(buf));

}



#define MAX_COREDUMP_LINE_LEN	40



struct devcoredump_test_data {

	enum devcoredump_state state;

	unsigned int timeout;

	char data[MAX_COREDUMP_LINE_LEN];

};



static inline void force_devcd_timeout(struct hci_dev *hdev,

				       unsigned int timeout)

{

#ifdef CONFIG_DEV_COREDUMP

	hdev->dump.timeout = msecs_to_jiffies(timeout * 1000);

#endif

}



static ssize_t force_devcd_write(struct file *file, const char __user *user_buf,

				 size_t count, loff_t *ppos)

{

	struct vhci_data *data = file->private_data;

	struct hci_dev *hdev = data->hdev;

	struct sk_buff *skb = NULL;

	struct devcoredump_test_data dump_data;

	int ret;



	ret = simple_write_to_buffer(&dump_data, sizeof(dump_data), ppos,

				     user_buf, count);

	if (ret < count)

		return ret;



	skb = alloc_skb(sizeof(dump_data.data), GFP_ATOMIC);

	if (!skb)

		return -ENOMEM;

	skb_put_data(skb, &dump_data.data, sizeof(dump_data.data));



	hci_devcd_register(hdev, vhci_coredump, vhci_coredump_hdr, NULL);



	/* Force the devcoredump timeout */

	if (dump_data.timeout)

		force_devcd_timeout(hdev, dump_data.timeout);



	ret = hci_devcd_init(hdev, skb->len);

	if (ret) {

		BT_ERR("Failed to generate devcoredump");

		kfree_skb(skb);

		return ret;

	}



	hci_devcd_append(hdev, skb);



	switch (dump_data.state) {

	case HCI_DEVCOREDUMP_DONE:

		hci_devcd_complete(hdev);

		break;

	case HCI_DEVCOREDUMP_ABORT:

		hci_devcd_abort(hdev);

		break;

	case HCI_DEVCOREDUMP_TIMEOUT:

		/* Do nothing */

		break;

	default:

		return -EINVAL;

	}



	return count;

}



static const struct file_operations force_devcoredump_fops = {

	.open		= simple_open,

	.write		= force_devcd_write,

};



static int __vhci_create_device(struct vhci_data *data, __u8 opcode)

{

	struct hci_dev *hdev;
@@ -355,6 +449,9 @@ static int __vhci_create_device(struct vhci_data *data, __u8 opcode) 
		debugfs_create_file("aosp_capable", 0644, hdev->debugfs, data,

				    &aosp_capable_fops);



	debugfs_create_file("force_devcoredump", 0644, hdev->debugfs, data,

			    &force_devcoredump_fops);



	hci_skb_pkt_type(skb) = HCI_VENDOR_PKT;



	skb_put_u8(skb, 0xff);