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Date: Fri, 8 Oct 2021 11:22:30 +0800 From: Li Feng <fengli@...rtx.com> To: Song Liu <song@...nel.org>, linux-raid@...r.kernel.org (open list:SOFTWARE RAID (Multiple Disks) SUPPORT), linux-kernel@...r.kernel.org (open list) Cc: Li Feng <fengli@...rtx.com> Subject: [PATCH RESEND] md: allow to set the fail_fast on RAID1/RAID10 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@...rtx.com> --- 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
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