From: Yu Kuai yukuai3@huawei.com
mainline inclusion from mainline-v6.7-rc1 commit 3389d57f97531efe9e285a0740c9b767d6f29f6c category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8T02O
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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There are no functional changes, just to make the code simpler and prepare to delay remove_and_add_spares() to md_start_sync().
Signed-off-by: Yu Kuai yukuai3@huawei.com Signed-off-by: Song Liu song@kernel.org Link: https://lore.kernel.org/r/20230825031622.1530464-5-yukuai1@huaweicloud.com Signed-off-by: Li Nan linan122@huawei.com --- drivers/md/md.c | 44 ++++++++++++++++++++++++++++++++++++++------ 1 file changed, 38 insertions(+), 6 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c index e9b41bf05855..3af1deab6658 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -9157,6 +9157,42 @@ void md_do_sync(struct md_thread *thread) } EXPORT_SYMBOL_GPL(md_do_sync);
+static bool rdev_removeable(struct md_rdev *rdev) +{ + /* rdev is not used. */ + if (rdev->raid_disk < 0) + return false; + + /* There are still inflight io, don't remove this rdev. */ + if (atomic_read(&rdev->nr_pending)) + return false; + + /* + * An error occurred but has not yet been acknowledged by the metadata + * handler, don't remove this rdev. + */ + if (test_bit(Blocked, &rdev->flags)) + return false; + + /* Fautly rdev is not used, it's safe to remove it. */ + if (test_bit(Faulty, &rdev->flags)) + return true; + + /* Journal disk can only be removed if it's faulty. */ + if (test_bit(Journal, &rdev->flags)) + return false; + + /* + * 'In_sync' is cleared while 'raid_disk' is valid, which means + * replacement has just become active from pers->spare_active(), and + * then pers->hot_remove_disk() will replace this rdev with replacement. + */ + if (!test_bit(In_sync, &rdev->flags)) + return true; + + return false; +} + static int remove_and_add_spares(struct mddev *mddev, struct md_rdev *this) { @@ -9189,12 +9225,8 @@ static int remove_and_add_spares(struct mddev *mddev, synchronize_rcu(); rdev_for_each(rdev, mddev) { if ((this == NULL || rdev == this) && - rdev->raid_disk >= 0 && - !test_bit(Blocked, &rdev->flags) && - ((test_bit(RemoveSynchronized, &rdev->flags) || - (!test_bit(In_sync, &rdev->flags) && - !test_bit(Journal, &rdev->flags))) && - atomic_read(&rdev->nr_pending)==0)) { + (test_bit(RemoveSynchronized, &rdev->flags) || + rdev_removeable(rdev))) { if (mddev->pers->hot_remove_disk( mddev, rdev) == 0) { sysfs_unlink_rdev(mddev, rdev);