Acked-by: Heinz Mauelshagen <hei...@redhat.com>
On 10/11/2016 06:21 PM, Andy Whitcroft wrote:
From a30fba068e41214cb0ffcb14e68722482765e0c9 Mon Sep 17 00:00:00 2001
From: Andy Whitcroft <a...@canonical.com>
Date: Tue, 11 Oct 2016 15:16:57 +0100
In ecbfb9f118bce4 ("dm raid: add raid level takeover support") a new
compatible feature flag was added. Validation for these compat_features
was added but this only passes for new raid mappings with this feature
flag. This causes previously created raid mappings to be failed at
import.
Clarification:
to allow for feature checks, the compat_features member was
in the dm-raid superblock from the beginning (so before ecbfb9f118bce4).
It got renamed from features to compat_features because incompat_features
got introduced with that commit together with the problematic check
of compat_features you thankfully found.
Check compat_features for the only valid combination.
Fixes: ecbfb9f118bce4 ("dm raid: add raid level takeover support")
Signed-off-by: Andy Whitcroft <a...@canonical.com>
---
drivers/md/dm-raid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
V2: simplify checks as per maintainer.
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 8abde6b..2a39700 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2258,7 +2258,8 @@ static int super_validate(struct raid_set *rs, struct
md_rdev *rdev)
if (!mddev->events && super_init_validation(rs, rdev))
return -EINVAL;
- if (le32_to_cpu(sb->compat_features) != FEATURE_FLAG_SUPPORTS_V190) {
+ if (le32_to_cpu(sb->compat_features) &&
+ le32_to_cpu(sb->compat_features) != FEATURE_FLAG_SUPPORTS_V190) {
rs->ti->error = "Unable to assemble array: Unknown flag(s) in
compatible feature flags";
return -EINVAL;
}
--
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