Hi Song,
What about this feature?
Thanks,
Feng Li
Li Feng <fengli@xxxxxxxxxx> 于2021年9月15日周三 下午11:08写道：
>
> ping ...
>
> Thanks,
> Feng Li
>
> Li Feng <fengli@xxxxxxxxxx> 于2021年9月13日周一 上午11:22写道：
> >
> > When the running RAID1/RAID10 need to be set with the fail_fast flag,
> > we have to remove each device from RAID and re-add it again with the
> > --fail_fast flag.
> >
> > Export the fail_fast flag to the userspace to support the read and
> > write.
> >
> > Signed-off-by: Li Feng <fengli@xxxxxxxxxx>
> > ---
> > drivers/md/md.c | 30 ++++++++++++++++++++++++++++++
> > 1 file changed, 30 insertions(+)
> >
> > diff --git a/drivers/md/md.c b/drivers/md/md.c
> > index ae8fe54ea358..ce63972a4555 100644
> > --- a/drivers/md/md.c
> > +++ b/drivers/md/md.c
> > @@ -3583,6 +3583,35 @@ ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len)
> > static struct rdev_sysfs_entry rdev_ppl_size =
> > __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store);
> >
> > +static ssize_t
> > +fail_fast_show(struct md_rdev *rdev, char *page)
> > +{
> > + return sprintf(page, "%d\n", test_bit(FailFast, &rdev->flags));
> > +}
> > +
> > +static ssize_t
> > +fail_fast_store(struct md_rdev *rdev, const char *buf, size_t len)
> > +{
> > + int ret;
> > + bool bit;
> > +
> > + ret = kstrtobool(buf, &bit);
> > + if (ret)
> > + return ret;
> > +
> > + if (test_bit(FailFast, &rdev->flags) && !bit) {
> > + clear_bit(FailFast, &rdev->flags);
> > + md_update_sb(rdev->mddev, 1);
> > + } else if (!test_bit(FailFast, &rdev->flags) && bit) {
> > + set_bit(FailFast, &rdev->flags);
> > + md_update_sb(rdev->mddev, 1);
> > + }
> > + return len;
> > +}
> > +
> > +static struct rdev_sysfs_entry rdev_fail_fast =
> > +__ATTR(fail_fast, 0644, fail_fast_show, fail_fast_store);
> > +
> > static struct attribute *rdev_default_attrs[] = {
> > &rdev_state.attr,
> > &rdev_errors.attr,
> > @@ -3595,6 +3624,7 @@ static struct attribute *rdev_default_attrs[] = {
> > &rdev_unack_bad_blocks.attr,
> > &rdev_ppl_sector.attr,
> > &rdev_ppl_size.attr,
> > + &rdev_fail_fast.attr,
> > NULL,
> > };
> > static ssize_t
> > --
> > 2.31.1
> >
