Re: [PATCH v3] ocfs2: heartbeat: replace simple_strtoul with kstrtoul

From: Joseph Qi
Date: Sun Nov 17 2024 - 20:11:42 EST




On 11/18/24 5:52 AM, 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>

Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
> ---
> v2->v3: code style change and return ret
> v1->v2: moved ret definition and removed blank lines
>
> fs/ocfs2/cluster/heartbeat.c | 21 ++++++++++++---------
> 1 file changed, 12 insertions(+), 9 deletions(-)
>
> diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
> index dff18efbc..76f1e7bfd 100644
> --- a/fs/ocfs2/cluster/heartbeat.c
> +++ b/fs/ocfs2/cluster/heartbeat.c
> @@ -1536,10 +1536,11 @@ static int o2hb_read_block_input(struct o2hb_region *reg,
> {
> unsigned long bytes;
> char *p = (char *)page;
> + int ret;
>
> - bytes = simple_strtoul(p, &p, 0);
> - if (!p || (*p && (*p != '\n')))
> - return -EINVAL;
> + ret = kstrtoul(p, 0, &bytes);
> + if (ret)
> + return ret;
>
> /* Heartbeat and fs min / max block sizes are the same. */
> if (bytes > 4096 || bytes < 512)
> @@ -1623,13 +1624,14 @@ static ssize_t o2hb_region_blocks_store(struct config_item *item,
> struct o2hb_region *reg = to_o2hb_region(item);
> unsigned long tmp;
> char *p = (char *)page;
> + int ret;
>
> if (reg->hr_bdev_file)
> return -EINVAL;
>
> - tmp = simple_strtoul(p, &p, 0);
> - if (!p || (*p && (*p != '\n')))
> - return -EINVAL;
> + ret = kstrtoul(p, 0, &tmp);
> + if (ret)
> + return ret;
>
> if (tmp > O2NM_MAX_NODES || tmp == 0)
> return -ERANGE;
> @@ -2141,10 +2143,11 @@ static ssize_t o2hb_heartbeat_group_dead_threshold_store(struct config_item *ite
> {
> unsigned long tmp;
> char *p = (char *)page;
> + int ret;
>
> - tmp = simple_strtoul(p, &p, 10);
> - if (!p || (*p && (*p != '\n')))
> - return -EINVAL;
> + ret = kstrtoul(p, 10, &tmp);
> + if (ret)
> + return ret;
>
> /* this will validate ranges for us. */
> o2hb_dead_threshold_set((unsigned int) tmp);