Re: [PATCH 23/29] f2fs: Convert to bdev_open_by_dev/path()

[Jan Kara <jack@suse.cz>]

On Mon 28-08-23 20:57:53, Chao Yu wrote:
> On 2023/8/23 18:48, Jan Kara wrote:
> > Convert f2fs to use bdev_open_by_dev/path() and pass the handle around.
> 
> Hi Jan,
> 
> Seems it will confilct w/ below commit, could you please take a look?
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev&id=51bf8d3c81992ae57beeaf22df78ed7c2782af9d

Yes, it will conflict. But I don't plan to rush these patches into the
currently running merge window so I can just rebase after the f2fs patch
gets upstream. Thanks for the heads up.

								Honza

> > CC: Jaegeuk Kim <jaegeuk@kernel.org>
> > CC: Chao Yu <chao@kernel.org>
> > CC: linux-f2fs-devel@lists.sourceforge.net
> > Acked-by: Christoph Hellwig <hch@lst.de>
> > Signed-off-by: Jan Kara <jack@suse.cz>
> > ---
> >   fs/f2fs/f2fs.h  |  1 +
> >   fs/f2fs/super.c | 17 +++++++++--------
> >   2 files changed, 10 insertions(+), 8 deletions(-)
> > 
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index e18272ae3119..2ec6c10df636 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -1234,6 +1234,7 @@ struct f2fs_bio_info {
> >   #define FDEV(i)				(sbi->devs[i])
> >   #define RDEV(i)				(raw_super->devs[i])
> >   struct f2fs_dev_info {
> > +	struct bdev_handle *bdev_handle;
> >   	struct block_device *bdev;
> >   	char path[MAX_PATH_LEN];
> >   	unsigned int total_segments;
> > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > index aa1f9a3a8037..885dcbd81859 100644
> > --- a/fs/f2fs/super.c
> > +++ b/fs/f2fs/super.c
> > @@ -1561,7 +1561,7 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
> >   	int i;
> >   	for (i = 0; i < sbi->s_ndevs; i++) {
> > -		blkdev_put(FDEV(i).bdev, sbi->sb);
> > +		bdev_release(FDEV(i).bdev_handle);
> >   #ifdef CONFIG_BLK_DEV_ZONED
> >   		kvfree(FDEV(i).blkz_seq);
> >   #endif
> > @@ -4196,9 +4196,9 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
> >   		if (max_devices == 1) {
> >   			/* Single zoned block device mount */
> > -			FDEV(0).bdev =
> > -				blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev, mode,
> > -						  sbi->sb, NULL);
> > +			FDEV(0).bdev_handle = bdev_open_by_dev(
> > +					sbi->sb->s_bdev->bd_dev, mode, sbi->sb,
> > +					NULL);
> >   		} else {
> >   			/* Multi-device mount */
> >   			memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
> > @@ -4216,12 +4216,13 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
> >   					(FDEV(i).total_segments <<
> >   					sbi->log_blocks_per_seg) - 1;
> >   			}
> > -			FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path, mode,
> > -							  sbi->sb, NULL);
> > +			FDEV(i).bdev_handle = bdev_open_by_path(FDEV(i).path,
> > +					mode, sbi->sb, NULL);
> >   		}
> > -		if (IS_ERR(FDEV(i).bdev))
> > -			return PTR_ERR(FDEV(i).bdev);
> > +		if (IS_ERR(FDEV(i).bdev_handle))
> > +			return PTR_ERR(FDEV(i).bdev_handle);
> > +		FDEV(i).bdev = FDEV(i).bdev_handle->bdev;
> >   		/* to release errored devices */
> >   		sbi->s_ndevs = i + 1;
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR