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Message-ID: <CAMGffEkbzTKkYY2yt-G8t1nO+y3+2+97=-ZgeUdF+ZE3iZvjng@mail.gmail.com>
Date: Wed, 13 Jul 2022 09:03:30 +0200
From: Jinpu Wang <jinpu.wang@...os.com>
To: Christoph Hellwig <hch@....de>
Cc: Jens Axboe <axboe@...nel.dk>,
Christoph Böhmwalder
<christoph.boehmwalder@...bit.com>,
"Md. Haris Iqbal" <haris.iqbal@...os.com>,
Song Liu <song@...nel.org>, "Theodore Ts'o" <tytso@....edu>,
Andreas Dilger <adilger.kernel@...ger.ca>,
Jan Kara <jack@...e.com>, Mark Fasheh <mark@...heh.com>,
Joel Becker <jlbec@...lplan.org>,
Joseph Qi <joseph.qi@...ux.alibaba.com>,
linux-block@...r.kernel.org, drbd-dev@...ts.linbit.com,
linux-raid@...r.kernel.org, linux-ext4@...r.kernel.org,
ocfs2-devel@....oracle.com
Subject: Re: [PATCH 6/9] rnbd-srv: remove the name field from struct rnbd_dev
On Wed, Jul 13, 2022 at 7:53 AM Christoph Hellwig <hch@....de> wrote:
>
> Just print the block device name directly using the %pg format specifier.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
Acked-by: Jack Wang <jinpu.wang@...os.com>
Thx!
> ---
> drivers/block/rnbd/rnbd-srv-dev.c | 1 -
> drivers/block/rnbd/rnbd-srv-dev.h | 1 -
> drivers/block/rnbd/rnbd-srv-sysfs.c | 5 ++---
> drivers/block/rnbd/rnbd-srv.c | 9 ++++-----
> drivers/block/rnbd/rnbd-srv.h | 3 +--
> 5 files changed, 7 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/block/rnbd/rnbd-srv-dev.c b/drivers/block/rnbd/rnbd-srv-dev.c
> index c5d0a03911659..c63017f6e4214 100644
> --- a/drivers/block/rnbd/rnbd-srv-dev.c
> +++ b/drivers/block/rnbd/rnbd-srv-dev.c
> @@ -28,7 +28,6 @@ struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags)
> goto err;
>
> dev->blk_open_flags = flags;
> - bdevname(dev->bdev, dev->name);
>
> return dev;
>
> diff --git a/drivers/block/rnbd/rnbd-srv-dev.h b/drivers/block/rnbd/rnbd-srv-dev.h
> index 4309e52524691..8407d12f70afe 100644
> --- a/drivers/block/rnbd/rnbd-srv-dev.h
> +++ b/drivers/block/rnbd/rnbd-srv-dev.h
> @@ -15,7 +15,6 @@
> struct rnbd_dev {
> struct block_device *bdev;
> fmode_t blk_open_flags;
> - char name[BDEVNAME_SIZE];
> };
>
> /**
> diff --git a/drivers/block/rnbd/rnbd-srv-sysfs.c b/drivers/block/rnbd/rnbd-srv-sysfs.c
> index feaa76c5a3423..297a6924ff4e2 100644
> --- a/drivers/block/rnbd/rnbd-srv-sysfs.c
> +++ b/drivers/block/rnbd/rnbd-srv-sysfs.c
> @@ -38,14 +38,13 @@ static struct kobj_type dev_ktype = {
> };
>
> int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
> - struct block_device *bdev,
> - const char *dev_name)
> + struct block_device *bdev)
> {
> struct kobject *bdev_kobj;
> int ret;
>
> ret = kobject_init_and_add(&dev->dev_kobj, &dev_ktype,
> - rnbd_devs_kobj, dev_name);
> + rnbd_devs_kobj, "%pg", bdev);
> if (ret) {
> kobject_put(&dev->dev_kobj);
> return ret;
> diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
> index beaef43a67b9d..0713014bf423f 100644
> --- a/drivers/block/rnbd/rnbd-srv.c
> +++ b/drivers/block/rnbd/rnbd-srv.c
> @@ -419,7 +419,7 @@ static struct rnbd_srv_sess_dev
> return sess_dev;
> }
>
> -static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(const char *id)
> +static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(struct block_device *bdev)
> {
> struct rnbd_srv_dev *dev;
>
> @@ -427,7 +427,7 @@ static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(const char *id)
> if (!dev)
> return ERR_PTR(-ENOMEM);
>
> - strscpy(dev->id, id, sizeof(dev->id));
> + snprintf(dev->id, sizeof(dev->id), "%pg", bdev);
> kref_init(&dev->kref);
> INIT_LIST_HEAD(&dev->sess_dev_list);
> mutex_init(&dev->lock);
> @@ -512,7 +512,7 @@ rnbd_srv_get_or_create_srv_dev(struct rnbd_dev *rnbd_dev,
> int ret;
> struct rnbd_srv_dev *new_dev, *dev;
>
> - new_dev = rnbd_srv_init_srv_dev(rnbd_dev->name);
> + new_dev = rnbd_srv_init_srv_dev(rnbd_dev->bdev);
> if (IS_ERR(new_dev))
> return new_dev;
>
> @@ -758,8 +758,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
> */
> mutex_lock(&srv_dev->lock);
> if (!srv_dev->dev_kobj.state_in_sysfs) {
> - ret = rnbd_srv_create_dev_sysfs(srv_dev, rnbd_dev->bdev,
> - rnbd_dev->name);
> + ret = rnbd_srv_create_dev_sysfs(srv_dev, rnbd_dev->bdev);
> if (ret) {
> mutex_unlock(&srv_dev->lock);
> rnbd_srv_err(srv_sess_dev,
> diff --git a/drivers/block/rnbd/rnbd-srv.h b/drivers/block/rnbd/rnbd-srv.h
> index be2ae486d407e..6926f9069dc4b 100644
> --- a/drivers/block/rnbd/rnbd-srv.h
> +++ b/drivers/block/rnbd/rnbd-srv.h
> @@ -68,8 +68,7 @@ void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
> /* rnbd-srv-sysfs.c */
>
> int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
> - struct block_device *bdev,
> - const char *dir_name);
> + struct block_device *bdev);
> void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
> int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
> void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
> --
> 2.30.2
>
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