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SubjectRe: [f2fs-dev] [PATCH] f2fs: show mounted time
On 02/27, Chao Yu wrote:
> On 2020/2/27 0:46, Jaegeuk Kim wrote:
> > Let's show mounted time.
> >
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> > ---
> > Documentation/ABI/testing/sysfs-fs-f2fs | 5 +++++
> > fs/f2fs/debug.c | 3 +++
> > fs/f2fs/segment.c | 2 +-
> > fs/f2fs/segment.h | 2 +-
> > fs/f2fs/sysfs.c | 8 ++++++++
> > 5 files changed, 18 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> > index 1a6cd5397129..ddee45e88270 100644
> > --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> > @@ -318,3 +318,8 @@ Date: September 2019
> > Contact: "Hridya Valsaraju" <hridya@google.com>
> > Description: Average number of valid blocks.
> > Available when CONFIG_F2FS_STAT_FS=y.
> > +
> > +What: /sys/fs/f2fs/<disk>/mounted_time
> > +Date: February 2020
> > +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
> > +Description: Show the mounted time of this partition.
>
> It's better to describe its unit: second, otherwise, it looks good to me.

I've added it. Thanks.

>
> Reviewed-by: Chao Yu <yuchao0@huawei.com>
>
> Thanks,
>
> > diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
> > index 6b89eae5e4ca..a8cf9626f71f 100644
> > --- a/fs/f2fs/debug.c
> > +++ b/fs/f2fs/debug.c
> > @@ -301,6 +301,9 @@ static int stat_show(struct seq_file *s, void *v)
> > si->ssa_area_segs, si->main_area_segs);
> > seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
> > si->overp_segs, si->rsvd_segs);
> > + seq_printf(s, "Current Time: %llu s / Mounted Time: %llu s\n\n",
> > + ktime_get_boottime_seconds(),
> > + SIT_I(si->sbi)->mounted_time);
> > if (test_opt(si->sbi, DISCARD))
> > seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
> > si->utilization, si->valid_count, si->discard_blks);
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index fb3e531a36d2..601d67e72c50 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -4073,7 +4073,7 @@ static int build_sit_info(struct f2fs_sb_info *sbi)
> > sit_i->dirty_sentries = 0;
> > sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
> > sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
> > - sit_i->mounted_time = ktime_get_real_seconds();
> > + sit_i->mounted_time = ktime_get_boottime_seconds();
> > init_rwsem(&sit_i->sentry_lock);
> > return 0;
> > }
> > diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> > index 459dc3901a57..7a83bd530812 100644
> > --- a/fs/f2fs/segment.h
> > +++ b/fs/f2fs/segment.h
> > @@ -756,7 +756,7 @@ static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi,
> > bool base_time)
> > {
> > struct sit_info *sit_i = SIT_I(sbi);
> > - time64_t diff, now = ktime_get_real_seconds();
> > + time64_t diff, now = ktime_get_boottime_seconds();
> >
> > if (now >= sit_i->mounted_time)
> > return sit_i->elapsed_time + now - sit_i->mounted_time;
> > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> > index 4e8aae03f26c..7bfbead98c04 100644
> > --- a/fs/f2fs/sysfs.c
> > +++ b/fs/f2fs/sysfs.c
> > @@ -187,6 +187,12 @@ static ssize_t encoding_show(struct f2fs_attr *a,
> > return sprintf(buf, "(none)");
> > }
> >
> > +static ssize_t mounted_time_show(struct f2fs_attr *a,
> > + struct f2fs_sb_info *sbi, char *buf)
> > +{
> > + return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
> > +}
> > +
> > #ifdef CONFIG_F2FS_STAT_FS
> > static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
> > struct f2fs_sb_info *sbi, char *buf)
> > @@ -546,6 +552,7 @@ F2FS_GENERAL_RO_ATTR(features);
> > F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
> > F2FS_GENERAL_RO_ATTR(unusable);
> > F2FS_GENERAL_RO_ATTR(encoding);
> > +F2FS_GENERAL_RO_ATTR(mounted_time);
> > #ifdef CONFIG_F2FS_STAT_FS
> > F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
> > F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
> > @@ -623,6 +630,7 @@ static struct attribute *f2fs_attrs[] = {
> > ATTR_LIST(reserved_blocks),
> > ATTR_LIST(current_reserved_blocks),
> > ATTR_LIST(encoding),
> > + ATTR_LIST(mounted_time),
> > #ifdef CONFIG_F2FS_STAT_FS
> > ATTR_LIST(cp_foreground_calls),
> > ATTR_LIST(cp_background_calls),
> >

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