Add devcoredump support for vhci that creates forcce_devcoredump debugfs
entry. This is used for mgmt-tester tests.
Signed-off-by: Manish Mandlik <mmandlik@xxxxxxxxxx>
---
Changes in v7:
- New patch in the series
drivers/bluetooth/Kconfig | 1 +
drivers/bluetooth/hci_vhci.c | 72 ++++++++++++++++++++++++++++++++++++
2 files changed, 73 insertions(+)
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 5a1a7bec3c42..7bc7a765ad69 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -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.
diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
index c443c3b0a4da..8a74e66f8b8e 100644
--- a/drivers/bluetooth/hci_vhci.c
+++ b/drivers/bluetooth/hci_vhci.c
@@ -278,6 +278,75 @@ static int vhci_setup(struct hci_dev *hdev)
return 0;
}
+static void vhci_coredump(struct hci_dev *hdev)
+{
+ /* No need to do anything */
+}
+
+static int vhci_coredump_hdr(struct hci_dev *hdev, char *buf, size_t size)
+{
+ char *ptr = buf;
+ size_t rem = size;
+ size_t read = 0;
+
+ read = snprintf(ptr, rem, "Controller Name: vhci_ctrl\n");
+ rem -= read;
+ ptr += read;
+
+ read = snprintf(ptr, rem, "Firmware Version: vhci_fw\n");
+ rem -= read;
+ ptr += read;
+
+ read = snprintf(ptr, rem, "Driver: vhci_drv\n");
+ rem -= read;
+ ptr += read;
+
+ read = snprintf(ptr, rem, "Vendor: vhci\n");
+ rem -= read;
+ ptr += read;
+
+ return size - rem;
+}
+
+static ssize_t force_devcoredump_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;
+ char buf[512];
+ int ret;
+
+ ret = simple_write_to_buffer(&buf, sizeof(buf), ppos, user_buf, count);
+ if (ret < count)
+ return ret;
+
+ skb = alloc_skb(count, GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+ skb_put_data(skb, &buf, count);
+
+ hci_devcoredump_register(hdev, vhci_coredump, vhci_coredump_hdr, NULL);
+
+ ret = hci_devcoredump_init(hdev, skb->len);
+ if (ret) {
+ BT_ERR("Failed to generate devcoredump");
+ kfree_skb(skb);
+ return ret;
+ }
+
+ hci_devcoredump_append(hdev, skb);
+ hci_devcoredump_complete(hdev);
+
+ return count;
+}
+
+static const struct file_operations force_devcoredump_fops = {
+ .open = simple_open,
+ .write = force_devcoredump_write,
+};
+
static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
{
struct hci_dev *hdev;
@@ -355,6 +424,9 @@ 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);
--
2.40.0.rc0.216.gc4246ad0f0-goog
