From: Yu Kuai yukuai3@huawei.com
mainline inclusion from mainline-v6.7-rc1 commit a0ae7e4e0bc00ae178e42391157e8ddb88b2838a 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/20230825031622.1530464-7-yukuai1@huaweicloud.com Signed-off-by: Li Nan linan122@huawei.com --- drivers/md/md.c | 39 +++++++++++++++++++++++++++------------ 1 file changed, 27 insertions(+), 12 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c index 508fd9b86cbc..96e546e1e83f 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -9204,6 +9204,31 @@ static bool rdev_is_spare(struct md_rdev *rdev) !test_bit(Faulty, &rdev->flags); }
+static bool rdev_addable(struct md_rdev *rdev) +{ + /* rdev is already used, don't add it again. */ + if (test_bit(Candidate, &rdev->flags) || rdev->raid_disk >= 0 || + test_bit(Faulty, &rdev->flags)) + return false; + + /* Allow to add journal disk. */ + if (test_bit(Journal, &rdev->flags)) + return true; + + /* Allow to add if array is read-write. */ + if (md_is_rdwr(rdev->mddev)) + return true; + + /* + * For read-only array, only allow to readd a rdev. And if bitmap is + * used, don't allow to readd a rdev that is too old. + */ + if (rdev->saved_raid_disk >= 0 && !test_bit(Bitmap_sync, &rdev->flags)) + return true; + + return false; +} + static int remove_and_add_spares(struct mddev *mddev, struct md_rdev *this) { @@ -9261,20 +9286,10 @@ static int remove_and_add_spares(struct mddev *mddev, continue; if (rdev_is_spare(rdev)) spares++; - if (test_bit(Candidate, &rdev->flags)) - continue; - if (rdev->raid_disk >= 0) + if (!rdev_addable(rdev)) continue; - if (test_bit(Faulty, &rdev->flags)) - continue; - if (!test_bit(Journal, &rdev->flags)) { - if (!md_is_rdwr(mddev) && - !(rdev->saved_raid_disk >= 0 && - !test_bit(Bitmap_sync, &rdev->flags))) - continue; - + if (!test_bit(Journal, &rdev->flags)) rdev->recovery_offset = 0; - } if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { /* failure here is OK */ sysfs_link_rdev(mddev, rdev);