Re: [PATCH] bcachefs: Change opts param to const pointer in bch2_opts_to_text

[Hongbo Li]

On 2024/9/13 2:35, Riyan Dhiman wrote:
> Convert struct bch_opts opts to const struct bch_opts *opts in
> bch2_opts_to_text() function paramter. This improves efficiency by
> avoiding structure copying and reflects the function's read-only
> access to opts.
>
> Fixes: 283ba1b92b1c (bcachefs: bch2_opts_to_text())
> Signed-off-by: Riyan Dhiman <riyandhiman14@xxxxxxxxx>
> ---
> Compile tested only.
>
>   fs/bcachefs/fs.c   | 2 +-
>   fs/bcachefs/opts.c | 4 ++--
>   fs/bcachefs/opts.h | 2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)

Reviewed-by: Hongbo Li <lihongbo22@xxxxxxxxxx>

> diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
> index e44794f7c6a0..1a2ba8472cb1 100644
> --- a/fs/bcachefs/fs.c
> +++ b/fs/bcachefs/fs.c
> @@ -1924,7 +1924,7 @@ static int bch2_show_options(struct seq_file *seq, struct dentry *root)
>   	struct bch_fs *c = root->d_sb->s_fs_info;
>   	struct printbuf buf = PRINTBUF;
>   
> -	bch2_opts_to_text(&buf, c->opts, c, c->disk_sb.sb,
> +	bch2_opts_to_text(&buf, &c->opts, c, c->disk_sb.sb,
>   			  OPT_MOUNT, OPT_HIDDEN, OPT_SHOW_MOUNT_STYLE);
>   	printbuf_nul_terminate(&buf);
>   	seq_puts(seq, buf.buf);
> diff --git a/fs/bcachefs/opts.c b/fs/bcachefs/opts.c
> index 232be8a44051..6216ab5d5c81 100644
> --- a/fs/bcachefs/opts.c
> +++ b/fs/bcachefs/opts.c
> @@ -444,7 +444,7 @@ void bch2_opt_to_text(struct printbuf *out,
>   }
>   
>   void bch2_opts_to_text(struct printbuf *out,
> -		       struct bch_opts opts,
> +		       const struct bch_opts *opts,
>   		       struct bch_fs *c, struct bch_sb *sb,
>   		       unsigned show_mask, unsigned hide_mask,
>   		       unsigned flags)
> @@ -457,7 +457,7 @@ void bch2_opts_to_text(struct printbuf *out,
>   		if ((opt->flags & hide_mask) || !(opt->flags & show_mask))
>   			continue;
>   
> -		u64 v = bch2_opt_get_by_id(&opts, i);
> +		u64 v = bch2_opt_get_by_id(opts, i);
>   		if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
>   			continue;
>   
> diff --git a/fs/bcachefs/opts.h b/fs/bcachefs/opts.h
> index cb2e244a2429..78e1991dc4be 100644
> --- a/fs/bcachefs/opts.h
> +++ b/fs/bcachefs/opts.h
> @@ -606,7 +606,7 @@ int bch2_opt_parse(struct bch_fs *, const struct bch_option *,
>   void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *,
>   		      const struct bch_option *, u64, unsigned);
>   void bch2_opts_to_text(struct printbuf *,
> -		       struct bch_opts,
> +		       const struct bch_opts *,
>   		       struct bch_fs *, struct bch_sb *,
>   		       unsigned, unsigned, unsigned);
>