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dm raid: correct error messages on old metadata validation 

When target 1.9.1 gets takeover/reshape requests on devices with old superblock
format not supporting such conversions and rejects them in super_init_validation(),
it logs bogus error message (e.g. Reshape when a takeover is requested).

Whilst on it, add messages for disk adding/removing and stripe sectors
reshape requests, use the newer rs_{takeover,reshape}_requested() API,
address a raid10 false positive in checking array positions and
remove rs_set_new() because device members are already set proper.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2016-10-18 17:46:45 +02:00 committed by Mike Snitzer
parent bb1423a96f
commit 453c2a8967
1 changed files with 39 additions and 32 deletions
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71
drivers/md/dm-raid.c
View File

@ -2050,16 +2050,17 @@ static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev)
mddev->reshape_position = MaxSector;
mddev->raid_disks = le32_to_cpu(sb->num_devices);
mddev->level = le32_to_cpu(sb->level);
mddev->layout = le32_to_cpu(sb->layout);
mddev->chunk_sectors = le32_to_cpu(sb->stripe_sectors);
/*
* Reshaping is supported, e.g. reshape_position is valid
* in superblock and superblock content is authoritative.
*/
if (le32_to_cpu(sb->compat_features) & FEATURE_FLAG_SUPPORTS_V190) {
/* Superblock is authoritative wrt given raid set layout! */
mddev->raid_disks = le32_to_cpu(sb->num_devices);
mddev->level = le32_to_cpu(sb->level);
mddev->layout = le32_to_cpu(sb->layout);
mddev->chunk_sectors = le32_to_cpu(sb->stripe_sectors);
mddev->new_level = le32_to_cpu(sb->new_level);
mddev->new_layout = le32_to_cpu(sb->new_layout);
mddev->new_chunk_sectors = le32_to_cpu(sb->new_stripe_sectors);
@ -2087,38 +2088,44 @@ static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev)
/*
* No takeover/reshaping, because we don't have the extended v1.9.0 metadata
*/
if (le32_to_cpu(sb->level) != mddev->new_level) {
DMERR("Reshaping/takeover raid sets not yet supported. (raid level/stripes/size change)");
return -EINVAL;
}
if (le32_to_cpu(sb->layout) != mddev->new_layout) {
DMERR("Reshaping raid sets not yet supported. (raid layout change)");
DMERR(" 0x%X vs 0x%X", le32_to_cpu(sb->layout), mddev->layout);
DMERR(" Old layout: %s w/ %d copies",
raid10_md_layout_to_format(le32_to_cpu(sb->layout)),
raid10_md_layout_to_copies(le32_to_cpu(sb->layout)));
DMERR(" New layout: %s w/ %d copies",
raid10_md_layout_to_format(mddev->layout),
raid10_md_layout_to_copies(mddev->layout));
return -EINVAL;
}
if (le32_to_cpu(sb->stripe_sectors) != mddev->new_chunk_sectors) {
DMERR("Reshaping raid sets not yet supported. (stripe sectors change)");
return -EINVAL;
}
struct raid_type *rt_cur = get_raid_type_by_ll(mddev->level, mddev->layout);
struct raid_type *rt_new = get_raid_type_by_ll(mddev->new_level, mddev->new_layout);
/* We can only change the number of devices in raid1 with old (i.e. pre 1.0.7) metadata */
if (!rt_is_raid1(rs->raid_type) &&
(le32_to_cpu(sb->num_devices) != mddev->raid_disks)) {
DMERR("Reshaping raid sets not yet supported. (device count change from %u to %u)",
sb->num_devices, mddev->raid_disks);
if (rs_takeover_requested(rs)) {
if (rt_cur && rt_new)
DMERR("Takeover raid sets from %s to %s not yet supported by metadata. (raid level change)",
rt_cur->name, rt_new->name);
else
DMERR("Takeover raid sets not yet supported by metadata. (raid level change)");
return -EINVAL;
} else if (rs_reshape_requested(rs)) {
DMERR("Reshaping raid sets not yet supported by metadata. (raid layout change keeping level)");
if (mddev->layout != mddev->new_layout) {
if (rt_cur && rt_new)
DMERR(" current layout %s vs new layout %s",
rt_cur->name, rt_new->name);
else
DMERR(" current layout 0x%X vs new layout 0x%X",
le32_to_cpu(sb->layout), mddev->new_layout);
}
if (mddev->chunk_sectors != mddev->new_chunk_sectors)
DMERR(" current stripe sectors %u vs new stripe sectors %u",
mddev->chunk_sectors, mddev->new_chunk_sectors);
if (rs->delta_disks)
DMERR(" current %u disks vs new %u disks",
mddev->raid_disks, mddev->raid_disks + rs->delta_disks);
if (rs_is_raid10(rs)) {
DMERR(" Old layout: %s w/ %u copies",
raid10_md_layout_to_format(mddev->layout),
raid10_md_layout_to_copies(mddev->layout));
DMERR(" New layout: %s w/ %u copies",
raid10_md_layout_to_format(mddev->new_layout),
raid10_md_layout_to_copies(mddev->new_layout));
}
return -EINVAL;
}
DMINFO("Discovered old metadata format; upgrading to extended metadata format");
/* Table line is checked vs. authoritative superblock */
rs_set_new(rs);
}
if (!test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))
@ -2211,7 +2218,7 @@ static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev)
continue;
if (role != r->raid_disk) {
if (__is_raid10_near(mddev->layout)) {
if (rs_is_raid10(rs) && __is_raid10_near(mddev->layout)) {
if (mddev->raid_disks % __raid10_near_copies(mddev->layout) ||
rs->raid_disks % rs->raid10_copies) {
rs->ti->error =