[PATCH 3/3] nvme: Allow reauth from sysfs

[Alistair Francis]

On Sat, Nov 1, 2025 at 12:05 AM Christoph Hellwig <hch at lst.de> wrote:
>
> On Thu, Oct 30, 2025 at 01:51:14PM +1000, alistair23 at gmail.com wrote:
> > From: Alistair Francis <alistair.francis at wdc.com>
> >
> > Allow userspace to trigger a reauth (REPLACETLSPSK) from sysfs.
> > This can be done by writing the queue ID to te sysfs file.
> >
> > echo 0 > /sys/devices/virtual/nvme-fabrics/ctl/nvme0/replace_psk
> >
> > Note that only QID 0 (admin queue) is supported.
>
> Why pass the queue ID then instead of a boolean value?

I liked the explicitness of passing a queue ID instead of a bool and
it allows supporting more queues in the future if that changes in the
spec.

I can change it to a bool instead if that's preferred?

Alistair

>
> > +static ssize_t nvme_sysfs_replace_psk(struct device *dev,
> > +                                   struct device_attribute *attr, const char *buf,
> > +                                   size_t count)
>
> Overly long line.  And very inefficient annoyoing to modify indentation
> compared to:
>
> static ssize_t nvme_sysfs_replace_psk(struct device *dev,
>                 struct device_attribute *attr, const char *buf, size_t count)
>
> > +     rc = kstrtoint(buf, 10, &qid);
> > +     if (rc)
> > +             return rc;
>
> Nitpick, but nvme style is to use the slightly more descriptive
> error and not "rc" which doesn't mean much in general.
>