Re: [PATCH] f2fs: add default mount options to remount

[He YunLei <heyunlei@huawei.com>]

On 2015/5/7 17:20, Yunlei He wrote:
> I use f2fs filesystem with /data partition on my Android phone
> by the default mount options. When I remount /data in order to
> adding discard option to run some benchmarks, I find the default
> options such as background_gc, user_xattr and acl turned off.
>
> So I introduce a function named default_options in super.c. It do
> some default setting, and both mount and remount operations will
> call this function to complete default setting.
>
> Signed-off-by: Yunlei He <heyunlei@huawei.com>
> ---
>   fs/f2fs/super.c | 32 ++++++++++++++++++--------------
>   1 file changed, 18 insertions(+), 14 deletions(-)
>
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 138fa93..1f9f18a 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -658,6 +658,22 @@ static const struct file_operations f2fs_seq_segment_info_fops = {
>   	.release = single_release,
>   };
>
> +static void default_options(struct f2fs_sb_info *sbi)
> +{
> +	/* init some FS parameters */
> +	sbi->active_logs = NR_CURSEG_TYPE;
> +
> +	set_opt(sbi, BG_GC);
> +	set_opt(sbi, INLINE_DATA);
> +
> +#ifdef CONFIG_F2FS_FS_XATTR
> +	set_opt(sbi, XATTR_USER);
> +#endif
> +#ifdef CONFIG_F2FS_FS_POSIX_ACL
> +	set_opt(sbi, POSIX_ACL);
> +#endif
> +}
> +
>   static int f2fs_remount(struct super_block *sb, int *flags, char *data)
>   {
>   	struct f2fs_sb_info *sbi = F2FS_SB(sb);
> @@ -675,8 +691,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
>   	org_mount_opt = sbi->mount_opt;
>   	active_logs = sbi->active_logs;
>
> -	sbi->mount_opt.opt = 0;
I am very sorry that this line is deleted by mistake, I'll send a version.


> -	sbi->active_logs = NR_CURSEG_TYPE;
> +	default_options(sbi);
>
>   	/* parse mount options */
>   	err = parse_options(sb, data);
> @@ -1018,18 +1033,7 @@ try_onemore:
>   		goto free_sbi;
>
>   	sb->s_fs_info = sbi;
> -	/* init some FS parameters */
> -	sbi->active_logs = NR_CURSEG_TYPE;
> -
> -	set_opt(sbi, BG_GC);
> -	set_opt(sbi, INLINE_DATA);
> -
> -#ifdef CONFIG_F2FS_FS_XATTR
> -	set_opt(sbi, XATTR_USER);
> -#endif
> -#ifdef CONFIG_F2FS_FS_POSIX_ACL
> -	set_opt(sbi, POSIX_ACL);
> -#endif
> +	default_options(sbi);
>   	/* parse mount options */
>   	options = kstrdup((const char *)data, GFP_KERNEL);
>   	if (data && !options) {
>


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