Re: [PATCH] ocfs2: heartbeat: replace simple_strtoul with kstrtoul

From: Daniel Yang
Date: Fri Nov 15 2024 - 02:54:37 EST


On Thu, Nov 14, 2024 at 5:01 PM Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx> wrote:
>
>
>
> On 11/13/24 4:41 PM, Daniel Yang wrote:
> > The function simple_strtoul is deprecated due to ignoring overflows and
> > also requires clunkier error checking. Replacing with kstrtoul() leads
> > to safer code and cleaner error checking.
> >
> > Signed-off-by: Daniel Yang <danielyangkang@xxxxxxxxx>
> > ---
> > fs/ocfs2/cluster/heartbeat.c | 15 +++++++++------
> > 1 file changed, 9 insertions(+), 6 deletions(-)
> >
> > diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
> > index dff18efbc..4fc1b23f1 100644
> > --- a/fs/ocfs2/cluster/heartbeat.c
> > +++ b/fs/ocfs2/cluster/heartbeat.c
> > @@ -1537,8 +1537,9 @@ static int o2hb_read_block_input(struct o2hb_region *reg,
> > unsigned long bytes;
> > char *p = (char *)page;
>
> Please define 'ret' here to make code style consistent.
> >
> > - bytes = simple_strtoul(p, &p, 0);
> > - if (!p || (*p && (*p != '\n')))
> > + int ret = kstrtoul(p, 0, &bytes);
> > +
>
> The above blane line can be eleminated.
>
> > + if (ret)
> > return -EINVAL;
> >
> > /* Heartbeat and fs min / max block sizes are the same. */
> > @@ -1627,8 +1628,9 @@ static ssize_t o2hb_region_blocks_store(struct config_item *item,
> > if (reg->hr_bdev_file)
> > return -EINVAL;
> >
> > - tmp = simple_strtoul(p, &p, 0);
> > - if (!p || (*p && (*p != '\n')))
> > + int ret = kstrtoul(p, 0, &tmp);
> > +
>
> Ditto.
>
> > + if (ret)
> > return -EINVAL;
> >
> > if (tmp > O2NM_MAX_NODES || tmp == 0)
> > @@ -2142,8 +2144,9 @@ static ssize_t o2hb_heartbeat_group_dead_threshold_store(struct config_item *ite
> > unsigned long tmp;
> > char *p = (char *)page;
> >
> > - tmp = simple_strtoul(p, &p, 10);
> > - if (!p || (*p && (*p != '\n')))
> > + int ret = kstrtoul(p, 10, &tmp);
> > +
>
> Ditto.
>
> Thanks,
> Joseph
> > + if (ret)
> > return -EINVAL;
> >
> > /* this will validate ranges for us. */
>

Ok sounds good. I moved ret to the beginning of each function and
removed the empty line after each ret = kstrtoul() statement. I just
sent a v2 of this patch. Let me know if there's any other issues.

- Daniel