[PATCH] md: allow to set the fail_fast on RAID1/RAID10
From: Li Feng <hidden>
Date: 2021-09-13 03:22:08
Also in:
lkml
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
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 <redacted> --- 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
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2.31.1