netdev - Re: [PATCH] net/bluetooth: Change to use DEFINE_SHOW

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Date:   Mon, 10 Dec 2018 09:42:23 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Yangtao Li <tiny.windzz@...il.com>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        linux-bluetooth@...r.kernel.org,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net/bluetooth: Change to use DEFINE_SHOW_ATTRIBUTE macro

On Mon, Nov 5, 2018 at 6:56 AM Yangtao Li <tiny.windzz@...il.com> wrote:
>
> Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
>
> Signed-off-by: Yangtao Li <tiny.windzz@...il.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

> ---
>  net/bluetooth/l2cap_core.c  | 12 +-----------
>  net/bluetooth/rfcomm/core.c | 12 +-----------
>  net/bluetooth/rfcomm/sock.c | 12 +-----------
>  net/bluetooth/sco.c         | 12 +-----------
>  4 files changed, 4 insertions(+), 44 deletions(-)
>
> diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
> index d17a4736e47c..38d92ced5fb5 100644
> --- a/net/bluetooth/l2cap_core.c
> +++ b/net/bluetooth/l2cap_core.c
> @@ -7615,17 +7615,7 @@ static int l2cap_debugfs_show(struct seq_file *f, void *p)
>         return 0;
>  }
>
> -static int l2cap_debugfs_open(struct inode *inode, struct file *file)
> -{
> -       return single_open(file, l2cap_debugfs_show, inode->i_private);
> -}
> -
> -static const struct file_operations l2cap_debugfs_fops = {
> -       .open           = l2cap_debugfs_open,
> -       .read           = seq_read,
> -       .llseek         = seq_lseek,
> -       .release        = single_release,
> -};
> +DEFINE_SHOW_ATTRIBUTE(l2cap_debugfs);
>
>  static struct dentry *l2cap_debugfs;
>
> diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
> index b98225d65e87..1a635df80643 100644
> --- a/net/bluetooth/rfcomm/core.c
> +++ b/net/bluetooth/rfcomm/core.c
> @@ -2166,17 +2166,7 @@ static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x)
>         return 0;
>  }
>
> -static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file)
> -{
> -       return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private);
> -}
> -
> -static const struct file_operations rfcomm_dlc_debugfs_fops = {
> -       .open           = rfcomm_dlc_debugfs_open,
> -       .read           = seq_read,
> -       .llseek         = seq_lseek,
> -       .release        = single_release,
> -};
> +DEFINE_SHOW_ATTRIBUTE(rfcomm_dlc_debugfs);
>
>  static struct dentry *rfcomm_dlc_debugfs;
>
> diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
> index d606e9212291..aa0db1d1bd9b 100644
> --- a/net/bluetooth/rfcomm/sock.c
> +++ b/net/bluetooth/rfcomm/sock.c
> @@ -1020,17 +1020,7 @@ static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p)
>         return 0;
>  }
>
> -static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file)
> -{
> -       return single_open(file, rfcomm_sock_debugfs_show, inode->i_private);
> -}
> -
> -static const struct file_operations rfcomm_sock_debugfs_fops = {
> -       .open           = rfcomm_sock_debugfs_open,
> -       .read           = seq_read,
> -       .llseek         = seq_lseek,
> -       .release        = single_release,
> -};
> +DEFINE_SHOW_ATTRIBUTE(rfcomm_sock_debugfs);
>
>  static struct dentry *rfcomm_sock_debugfs;
>
> diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
> index 8f0f9279eac9..529b38996d8b 100644
> --- a/net/bluetooth/sco.c
> +++ b/net/bluetooth/sco.c
> @@ -1173,17 +1173,7 @@ static int sco_debugfs_show(struct seq_file *f, void *p)
>         return 0;
>  }
>
> -static int sco_debugfs_open(struct inode *inode, struct file *file)
> -{
> -       return single_open(file, sco_debugfs_show, inode->i_private);
> -}
> -
> -static const struct file_operations sco_debugfs_fops = {
> -       .open           = sco_debugfs_open,
> -       .read           = seq_read,
> -       .llseek         = seq_lseek,
> -       .release        = single_release,
> -};
> +DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
>
>  static struct dentry *sco_debugfs;
>
> --
> 2.17.0
>


-- 
Kees Cook