2017-03-09 14:53:09

by Marcin Ciupak

[permalink] [raw]
Subject: [PATCH] staging: lustre: replace simple_strtoul with kstrtoint

Replace simple_strtoul with kstrtoint.
simple_strtoul is marked for obsoletion.

Signed-off-by: Marcin Ciupak <[email protected]>
---
drivers/staging/lustre/lustre/obdclass/obd_mount.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
index 8e0d4b1d86dc..4a604e9b3e49 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
@@ -924,12 +924,24 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
clear++;
} else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
- lmd->lmd_recovery_time_soft = max_t(int,
- simple_strtoul(s1 + 19, NULL, 10), time_min);
+ int res;
+
+ rc = kstrtoint(s1 + 19, 10, &res);
+ if (rc)
+ lmd->lmd_recovery_time_soft = time_min;
+ else
+ lmd->lmd_recovery_time_soft = max_t(int, res,
+ time_min);
clear++;
} else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
- lmd->lmd_recovery_time_hard = max_t(int,
- simple_strtoul(s1 + 19, NULL, 10), time_min);
+ int res;
+
+ rc = kstrtoint(s1 + 19, 10, &res);
+ if (rc)
+ lmd->lmd_recovery_time_hard = time_min;
+ else
+ lmd->lmd_recovery_time_hard = max_t(int, res,
+ time_min);
clear++;
} else if (strncmp(s1, "noir", 4) == 0) {
lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
--
2.11.1


2017-03-12 13:37:15

by Greg Kroah-Hartman

[permalink] [raw]
Subject: Re: [PATCH] staging: lustre: replace simple_strtoul with kstrtoint

On Thu, Mar 09, 2017 at 03:53:00PM +0100, Marcin Ciupak wrote:
> Replace simple_strtoul with kstrtoint.

Why?

> simple_strtoul is marked for obsoletion.
>
> Signed-off-by: Marcin Ciupak <[email protected]>
> ---
> drivers/staging/lustre/lustre/obdclass/obd_mount.c | 20 ++++++++++++++++----
> 1 file changed, 16 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> index 8e0d4b1d86dc..4a604e9b3e49 100644
> --- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> +++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> @@ -924,12 +924,24 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
> lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
> clear++;
> } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
> - lmd->lmd_recovery_time_soft = max_t(int,
> - simple_strtoul(s1 + 19, NULL, 10), time_min);
> + int res;
> +
> + rc = kstrtoint(s1 + 19, 10, &res);
> + if (rc)
> + lmd->lmd_recovery_time_soft = time_min;
> + else
> + lmd->lmd_recovery_time_soft = max_t(int, res,
> + time_min);

Are you sure this is correct? Do you really want to use max_t()? Why
is time_min used if there is an error? Can't this all be written a lot
simpler to actually make it semi-sane?

thanks,

greg k-h

2017-03-12 15:51:45

by Marcin Ciupak

[permalink] [raw]
Subject: Re: [PATCH] staging: lustre: replace simple_strtoul with kstrtoint

On Sun, Mar 12, 2017 at 02:36:47PM +0100, Greg Kroah-Hartman wrote:
> On Thu, Mar 09, 2017 at 03:53:00PM +0100, Marcin Ciupak wrote:
> > Replace simple_strtoul with kstrtoint.
>
> Why?
Because
> > simple_strtoul is marked for obsoletion.
as reported by checkpatch.pl.
> >
> > Signed-off-by: Marcin Ciupak <[email protected]>
> > ---
> > drivers/staging/lustre/lustre/obdclass/obd_mount.c | 20 ++++++++++++++++----
> > 1 file changed, 16 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> > index 8e0d4b1d86dc..4a604e9b3e49 100644
> > --- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> > +++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
> > @@ -924,12 +924,24 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
> > lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
> > clear++;
> > } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
> > - lmd->lmd_recovery_time_soft = max_t(int,
> > - simple_strtoul(s1 + 19, NULL, 10), time_min);
> > + int res;
> > +
> > + rc = kstrtoint(s1 + 19, 10, &res);
> > + if (rc)
> > + lmd->lmd_recovery_time_soft = time_min;
> > + else
> > + lmd->lmd_recovery_time_soft = max_t(int, res,
> > + time_min);
>
> Are you sure this is correct? Do you really want to use max_t()? Why
> is time_min used if there is an error? Can't this all be written a lot
> simpler to actually make it semi-sane?
>
> thanks,
>
> greg k-h

max_t() and time_min were already used in the original code, I did not want to change
that.

Regarding error handling, I saw two options here:
1. update variable with some fail-safe value and time_min looked good
for that or,
2. do not update anything and do nothing or "goto invalid:" but I was not sure
about that, so selected first option.

If first option is not the best one, what would be better in case of error handling?

Thanks,
Marcin