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authorShaohua Li <shli@fb.com>2018-10-14 17:05:07 -0700
committerShaohua Li <shli@fb.com>2018-10-14 17:05:07 -0700
commit9e753ba9b9b405e3902d9f08aec5f2ea58a0c317 (patch)
treee13775c41d767d74ea43520db9d064829f7a133b
parentf8f83d8ffeb47041ff0937ecac6d10bcb388cd9f (diff)
MD: fix invalid stored role for a disk - try2
Commit d595567dc4f0 (MD: fix invalid stored role for a disk) broke linear hotadd. Let's only fix the role for disks in raid1/10. Based on Guoqing's original patch. Reported-by: kernel test robot <rong.a.chen@intel.com> Cc: Gioh Kim <gi-oh.kim@profitbricks.com> Cc: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
-rw-r--r--drivers/md/md.c4
-rw-r--r--drivers/md/raid1.c1
-rw-r--r--drivers/md/raid10.c1
3 files changed, 2 insertions, 4 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 62bf96daa157..4c0f3e0331d5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1774,10 +1774,6 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev)
} else
set_bit(In_sync, &rdev->flags);
rdev->raid_disk = role;
- if (role >= mddev->raid_disks) {
- rdev->saved_raid_disk = -1;
- rdev->raid_disk = -1;
- }
break;
}
if (sb->devflags & WriteMostly1)
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4e990246225e..1d54109071cc 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1734,6 +1734,7 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
*/
if (rdev->saved_raid_disk >= 0 &&
rdev->saved_raid_disk >= first &&
+ rdev->saved_raid_disk < conf->raid_disks &&
conf->mirrors[rdev->saved_raid_disk].rdev == NULL)
first = last = rdev->saved_raid_disk;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 749848b2c477..a52f43b151b5 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1808,6 +1808,7 @@ static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev)
first = last = rdev->raid_disk;
if (rdev->saved_raid_disk >= first &&
+ rdev->saved_raid_disk < conf->geo.raid_disks &&
conf->mirrors[rdev->saved_raid_disk].rdev == NULL)
mirror = rdev->saved_raid_disk;
else