netdev - Re: [PATCH] Bluetooth: include file and function names in logs

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Date:   Wed, 11 Mar 2020 15:32:59 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Manish Mandlik <mmandlik@...gle.com>
Cc:     Joseph Hwang <josephsih@...omium.org>,
        Yoni Shavit <yshavit@...omium.org>,
        Miao-chen Chou <mcchou@...omium.org>,
        Alain Michaud <alainm@...omium.org>,
        linux-bluetooth@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Johan Hedberg <johan.hedberg@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH] Bluetooth: include file and function names in logs

Hi Manish,

> Include file and function names in bluetooth kernel logs to
> help debugging.
> 
> Signed-off-by: Joseph Hwang <josephsih@...omium.org>
> Signed-off-by: Manish Mandlik <mmandlik@...gle.com>
> ---
> 
> include/net/bluetooth/bluetooth.h | 19 +++++++++++++++----
> 1 file changed, 15 insertions(+), 4 deletions(-)
> 
> diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
> index 1576353a27732..2024d9c53d687 100644
> --- a/include/net/bluetooth/bluetooth.h
> +++ b/include/net/bluetooth/bluetooth.h
> @@ -150,10 +150,21 @@ void bt_warn_ratelimited(const char *fmt, ...);
> __printf(1, 2)
> 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__)
> -#define BT_DBG(fmt, ...)	pr_debug(fmt "\n", ##__VA_ARGS__)
> +static inline const char *basename(const char *path)
> +{
> +	const char *str = strrchr(path, '/');
> +
> +	return str ? (str + 1) : path;
> +}
> +
> +#define BT_INFO(fmt, ...)	bt_info("%s:%s() " fmt "\n",		\
> +				basename(__FILE__), __func__, ##__VA_ARGS__)
> +#define BT_WARN(fmt, ...)	bt_warn("%s:%s() " fmt "\n",		\
> +				basename(__FILE__), __func__, ##__VA_ARGS__)
> +#define BT_ERR(fmt, ...)	bt_err("%s:%s() " fmt "\n",		\
> +				basename(__FILE__), __func__, ##__VA_ARGS__)
> +#define BT_DBG(fmt, ...)	pr_debug("%s:%s() " fmt "\n",		\
> +				basename(__FILE__), __func__, ##__VA_ARGS__)
> 
> #define bt_dev_info(hdev, fmt, ...)				\
> 	BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)

this is NAK from my side. We don’t want to include __FILE__ and __func__ names in the standard messages. I am however working in revamping the whole printk and debug of the Bluetooth subsystem. I will send around the initial pieces of my work as a RFC soon.

Regards

Marcel