linux-ext4 - Re: [PATCH v2] ext2: add warning when specifying nocheck option

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Date:   Thu, 7 Jun 2018 17:28:34 +0200
From:   Jan Kara <jack@...e.cz>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     Chengguang Xu <cgxu519@....com>, jack@...e.com,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v2] ext2: add warning when specifying nocheck option

On Thu 07-06-18 08:18:55, Darrick J. Wong wrote:
> On Thu, Jun 07, 2018 at 08:19:07PM +0800, Chengguang Xu wrote:
> > The option nocheck(nocheck/check=none) is useless but considering
> > backwards compatibility it's better to print warning for a while
> > before completely remove from the code.
> > 
> > This patch add proper warning message for option 'nocheck' and
> > remove unnecessary comment/function declaration which is used for
> > removed option 'check'.
> > 
> > Signed-off-by: Chengguang Xu <cgxu519@....com>
> > ---
> > v1->v2:
> > - Keep option nocheck as is and only add warning message.
> > 
> >  fs/ext2/ext2.h  | 2 --
> >  fs/ext2/super.c | 5 ++---
> >  2 files changed, 2 insertions(+), 5 deletions(-)
> > 
> > diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
> > index cc40802ddfa8..00e759f05161 100644
> > --- a/fs/ext2/ext2.h
> > +++ b/fs/ext2/ext2.h
> > @@ -748,7 +748,6 @@ extern void ext2_free_blocks (struct inode *, unsigned long,
> >  			      unsigned long);
> >  extern unsigned long ext2_count_free_blocks (struct super_block *);
> >  extern unsigned long ext2_count_dirs (struct super_block *);
> > -extern void ext2_check_blocks_bitmap (struct super_block *);
> >  extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
> >  						    unsigned int block_group,
> >  						    struct buffer_head ** bh);
> > @@ -771,7 +770,6 @@ extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page
> >  extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *);
> >  extern void ext2_free_inode (struct inode *);
> >  extern unsigned long ext2_count_free_inodes (struct super_block *);
> > -extern void ext2_check_inodes_bitmap (struct super_block *);
> >  extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
> >  
> >  /* inode.c */
> > diff --git a/fs/ext2/super.c b/fs/ext2/super.c
> > index c09289a42dc5..a1adfcf77d73 100644
> > --- a/fs/ext2/super.c
> > +++ b/fs/ext2/super.c
> > @@ -557,6 +557,8 @@ static int parse_options(char *options, struct super_block *sb,
> >  			set_opt (opts->s_mount_opt, NO_UID32);
> >  			break;
> >  		case Opt_nocheck:
> > +			ext2_msg(sb, KERN_WARNING,
> > +				"Option nocheck/check=none is deprecated and will be removed in the future.");
> 
> You might want to supply a specific deprecation schedule:
> 
> "..and will be removed in June 2020."

Yeah, that's probably even better. Thanks for the suggestion.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR