diff options
| author | NeilBrown <neilb@suse.de> | 2013-04-24 11:42:44 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-07 20:33:12 -0700 |
| commit | aaf49388fdf26e315e62f67614c77dceb319c837 (patch) | |
| tree | 9b31f5d96cf882403d9cca6fc0790997a2567df4 | |
| parent | 17f978ddc76d3163bc4dd2d6bf7dd848065b4c78 (diff) | |
| download | lwn-aaf49388fdf26e315e62f67614c77dceb319c837.tar.gz lwn-aaf49388fdf26e315e62f67614c77dceb319c837.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/md.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index aeceedfc530b..a4a93b9859fd 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1564,8 +1564,8 @@ 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; @@ -3221,7 +3221,7 @@ 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) @@ -3293,9 +3293,6 @@ 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; |