On Thu 22-10-20 06:21:00, Roman Anufriev wrote:
> Right now, it is hard to understand which quota journalling type is enabled:
> you need to be quite familiar with kernel code and trace it or really
> understand what different combinations of fs flags/mount options lead to.
>
> This patch adds printing of current quota jounalling mode on each
> mount/remount, thus making it easier to check it at a glance/in autotests.
> The semantics is similar to ext4 data journalling modes:
>
> * journalled - quota configured, journalling will be enabled
> * writeback - quota configured, journalling won't be enabled
> * none - quota isn't configured
> * disabled - kernel compiled without CONFIG_QUOTA feature
>
> Signed-off-by: Roman Anufriev <dotdot@xxxxxxxxxxxxxx>
Looks good to me. You can add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/ext4/super.c | 23 ++++++++++++++++++++---
> 1 file changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index a988cf3..f2ddba4 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -3985,6 +3985,21 @@ static void ext4_set_resv_clusters(struct super_block *sb)
> atomic64_set(&sbi->s_resv_clusters, resv_clusters);
> }
>
> +static const char *ext4_quota_mode(struct super_block *sb)
> +{
> +#ifdef CONFIG_QUOTA
> + if (!ext4_quota_capable(sb))
> + return "none";
> +
> + if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb))
> + return "journalled";
> + else
> + return "writeback";
> +#else
> + return "disabled";
> +#endif
> +}
> +
> static int ext4_fill_super(struct super_block *sb, void *data, int silent)
> {
> struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);
> @@ -5039,10 +5054,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>
> if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))
> ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
> - "Opts: %.*s%s%s", descr,
> + "Opts: %.*s%s%s. Quota mode: %s.", descr,
> (int) sizeof(sbi->s_es->s_mount_opts),
> sbi->s_es->s_mount_opts,
> - *sbi->s_es->s_mount_opts ? "; " : "", orig_data);
> + *sbi->s_es->s_mount_opts ? "; " : "", orig_data,
> + ext4_quota_mode(sb));
>
> if (es->s_error_count)
> mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */
> @@ -5979,7 +5995,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
> */
> *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags);
>
> - ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data);
> + ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.",
> + orig_data, ext4_quota_mode(sb));
> kfree(orig_data);
> return 0;
>
> --
> 2.7.4
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
