Hi Marcel, Alain,
Looks wonderful to me.
On Sat, 1 Feb 2020 at 06:04, Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote:
>
> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
> ---
> include/net/bluetooth/bluetooth.h | 8 ++++
> net/bluetooth/Kconfig | 7 +++
> net/bluetooth/af_bluetooth.c | 2 +
> net/bluetooth/lib.c | 71 +++++++++++++++++++++++++++++++
> 4 files changed, 88 insertions(+)
>
> diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
> index e42bb8e03c09..04f122957314 100644
> --- a/include/net/bluetooth/bluetooth.h
> +++ b/include/net/bluetooth/bluetooth.h
> @@ -129,6 +129,8 @@ void bt_warn(const char *fmt, ...);
> __printf(1, 2)
> void bt_err(const char *fmt, ...);
> __printf(1, 2)
> +void bt_dbg(const char *fmt, ...);
> +__printf(1, 2)
> void bt_warn_ratelimited(const char *fmt, ...);
> __printf(1, 2)
> void bt_err_ratelimited(const char *fmt, ...);
> @@ -136,7 +138,11 @@ void bt_err_ratelimited(const char *fmt, ...);
> #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
> #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
> #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
> +#if IS_ENABLED(CONFIG_BT_DEBUGFS_OPTION)
> +#define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
> +#else
> #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
> +#endif
>
> #define bt_dev_info(hdev, fmt, ...) \
> BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
> @@ -393,6 +399,8 @@ void bt_procfs_cleanup(struct net *net, const char *name);
>
> extern struct dentry *bt_debugfs;
>
> +void bt_lib_debugfs_init(void);
> +
> int l2cap_init(void);
> void l2cap_exit(void);
>
> diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
> index 165148c7c4ce..2871d0770c11 100644
> --- a/net/bluetooth/Kconfig
> +++ b/net/bluetooth/Kconfig
> @@ -128,4 +128,11 @@ config BT_DEBUGFS
> Provide extensive information about internal Bluetooth states
> in debugfs.
>
> + When dynamic debug is not used, then this option also includes
> + a switch to enable/disable internal debug statements.
> +
> +config BT_DEBUGFS_OPTION
> + bool
> + default y if BT_DEBUGFS && !DYNAMIC_DEBUG
> +
> source "drivers/bluetooth/Kconfig"
> diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
> index 3fd124927d4d..fa0cd665f32a 100644
> --- a/net/bluetooth/af_bluetooth.c
> +++ b/net/bluetooth/af_bluetooth.c
> @@ -731,6 +731,8 @@ static int __init bt_init(void)
>
> bt_debugfs = debugfs_create_dir("bluetooth", NULL);
>
> + bt_lib_debugfs_init();
> +
> bt_leds_init();
>
> err = bt_sysfs_init();
> diff --git a/net/bluetooth/lib.c b/net/bluetooth/lib.c
> index c09e0a3a0ed9..47c7b0244d1d 100644
> --- a/net/bluetooth/lib.c
> +++ b/net/bluetooth/lib.c
> @@ -27,6 +27,7 @@
> #define pr_fmt(fmt) "Bluetooth: " fmt
>
> #include <linux/export.h>
> +#include <linux/debugfs.h>
>
> #include <net/bluetooth/bluetooth.h>
>
> @@ -135,6 +136,57 @@ int bt_to_errno(__u16 code)
> }
> EXPORT_SYMBOL(bt_to_errno);
>
> +#ifdef CONFIG_BT_DEBUGFS_OPTION
> +static bool debug_enable;
> +
> +static ssize_t debug_enable_read(struct file *file, char __user *user_buf,
> + size_t count, loff_t *ppos)
> +{
> + char buf[3];
> +
> + buf[0] = debug_enable ? 'Y': 'N';
> + buf[1] = '\n';
> + buf[2] = '\0';
> + return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
> +}
> +
> +static ssize_t debug_enable_write(struct file *file,
> + const char __user *user_buf,
> + size_t count, loff_t *ppos)
> +{
> + bool enable;
> + int err;
> +
> + err = kstrtobool_from_user(user_buf, count, &enable);
> + if (err)
> + return err;
> +
> + if (enable == debug_enable)
> + return -EALREADY;
> +
> + debug_enable = enable;
> +
> + return count;
> +}
> +
> +static const struct file_operations debug_enable_fops = {
> + .open = simple_open,
> + .read = debug_enable_read,
> + .write = debug_enable_write,
> + .llseek = default_llseek,
> +};
> +
> +void bt_lib_debugfs_init(void)
> +{
> + debugfs_create_file("debug_enable", 0644, bt_debugfs, NULL,
> + &debug_enable_fops);
> +}
> +#else
> +void bt_lib_debugfs_init(void)
> +{
> +}
> +#endif
> +
> void bt_info(const char *format, ...)
> {
> struct va_format vaf;
> @@ -183,6 +235,25 @@ void bt_err(const char *format, ...)
> }
> EXPORT_SYMBOL(bt_err);
>
> +void bt_dbg(const char *format, ...)
> +{
> + struct va_format vaf;
> + va_list args;
> +
> + if (likely(!debug_enable))
> + return;
> +
> + va_start(args, format);
> +
> + vaf.fmt = format;
> + vaf.va = &args;
> +
> + printk(KERN_DEBUG pr_fmt("%pV"), &vaf);
> +
> + va_end(args);
> +}
> +EXPORT_SYMBOL(bt_dbg);
> +
> void bt_warn_ratelimited(const char *format, ...)
> {
> struct va_format vaf;
> --
> 2.24.1
>
