提交 2863b9eb 编写于 作者: J Jonathan Brassow 提交者: NeilBrown

MD RAID10: Prep for DM RAID10 device replacement capability

MD RAID10:  Fix a couple potential kernel panics if RAID10 is used by dm-raid

When device-mapper uses the RAID10 personality through dm-raid.c, there is no
'gendisk' structure in mddev and some sysfs information is also not populated.

This patch avoids touching those non-existent structures.
Signed-off-by: NJonathan Brassow <jbrassow@rehdat.com>
Signed-off-by: NNeilBrown <neilb@suse.de>
上级 1ca69c4b
......@@ -2044,8 +2044,14 @@ EXPORT_SYMBOL(md_integrity_register);
/* Disable data integrity if non-capable/non-matching disk is being added */
void md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
struct blk_integrity *bi_rdev = bdev_get_integrity(rdev->bdev);
struct blk_integrity *bi_mddev = blk_get_integrity(mddev->gendisk);
struct blk_integrity *bi_rdev;
struct blk_integrity *bi_mddev;
if (!mddev->gendisk)
return;
bi_rdev = bdev_get_integrity(rdev->bdev);
bi_mddev = blk_get_integrity(mddev->gendisk);
if (!bi_mddev) /* nothing to do */
return;
......
......@@ -1694,7 +1694,7 @@ static int raid10_spare_active(struct mddev *mddev)
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_and_set_bit(In_sync, &tmp->rdev->flags)) {
count++;
sysfs_notify_dirent(tmp->rdev->sysfs_state);
sysfs_notify_dirent_safe(tmp->rdev->sysfs_state);
}
}
spin_lock_irqsave(&conf->device_lock, flags);
......
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