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authorNeilBrown <neilb@suse.de>2013-04-24 11:42:44 +1000
committerBen Hutchings <ben@decadent.org.uk>2013-05-13 15:02:29 +0100
commitb6e777b986dc9af7b0a28e8a32b80aec2296684a (patch)
tree3453137fe80b0e340a05970822b8ab416b22a132 /drivers/md
parent84c2c44393f9d054aa07e75e68743364f1ad7c2d (diff)
md: bad block list should default to disabled.
commit 486adf72ccc0c235754923d47a2270c5dcb0c98b upstream. Maintenance of a bad-block-list currently defaults to 'enabled' and is then disabled when it cannot be supported. This is backwards and causes problem for dm-raid which didn't know to disable it. So fix the defaults, and only enabled for v1.x metadata which explicitly has bad blocks enabled. The problem with dm-raid has been present since badblock support was added in v3.1, so this patch is suitable for any -stable from 3.1 onwards. Reported-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1702133a91af..2d0544c92737 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1588,8 +1588,8 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_
sector, count, 1) == 0)
return -EINVAL;
}
- } else if (sb->bblog_offset == 0)
- rdev->badblocks.shift = -1;
+ } else if (sb->bblog_offset != 0)
+ rdev->badblocks.shift = 0;
if (!refdev) {
ret = 1;
@@ -3063,7 +3063,7 @@ int md_rdev_init(struct md_rdev *rdev)
* be used - I wonder if that matters
*/
rdev->badblocks.count = 0;
- rdev->badblocks.shift = 0;
+ rdev->badblocks.shift = -1; /* disabled until explicitly enabled */
rdev->badblocks.page = kmalloc(PAGE_SIZE, GFP_KERNEL);
seqlock_init(&rdev->badblocks.lock);
if (rdev->badblocks.page == NULL)
@@ -3135,9 +3135,6 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
goto abort_free;
}
}
- if (super_format == -1)
- /* hot-add for 0.90, or non-persistent: so no badblocks */
- rdev->badblocks.shift = -1;
return rdev;