Currently we compare fields between primary and secondary
superblocks, before we check if the primary is even valid.
This is a bit backwards, so reverse it.
Signed-off-by: NeilBrown <neilb@suse.de>
The "indirect" code path for adding VDs was not working correctly
for secondary RAID level. The "other BVDs" were not transmitted
to mdmon. Thus mdmon wouldn't build up correct information, and
RAID creation would fail when mdmon was already running on the container.
This patch fixes this.
Signed-off-by: NeilBrown <neilb@suse.de>
The return value of disk.raid_disk may be wrong.
The old code was using raiddisk, which is only valid with auto
layout. This leads to errors when arrays are created with
specified disks and mdmon is already running, like this:
mdadm -CR /dev/md/container -n5 $d1 $d2 $d3 $d4 $d5
mdadm -CR /dev/md/r5 -n5 -l5 /dev/md/container -z 5000
mdadm -CR /dev/md/r1 -n2 -l1 $d1 $d2
=> resulting array will use wrong disks
This patch fixes that.
Signed-off-by: NeilBrown <neilb@suse.de>
Use refnum rather than raiddisk for identifying the physical disk.
raiddisk should only be used for auto-layout.
Signed-off-by: NeilBrown <neilb@suse.de>
Implement kill_subarray, for mdmon running and not running.
The way Kill_subarray() is implemented, this requires that the
DDF layer uses "currentconf" to remember the last subarray
queried with container_content(), and use it as the one to kill.
I don't like this much but IMSM does it the same way.
Signed-off-by: NeilBrown <neilb@suse.de>
commit d682f344 inserted this call to "Kill" in write_init_super_ddf:
"Matching the functionality already in super0 and super1, when
we first create a container, remove any other recognisable metadata to
ensure it doesn't cause confusion."
But we should do this only at first container creation, not when
subarrays are created later.
Signed-off-by: NeilBrown <neilb@suse.de>
With secondary RAID level, disks may belong to other BVDs in
a given conf record. This needs to be taken into account
when fixing the vlist.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
For secondary RAID, we need to check which BVD needs to be updated.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
For debugging DDF structure changes, it is important to be able
to identify VCs by their GUIDs.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
If there are already disks in the container, reserve the same amount
of workspace as the first disk. Fill in the primary/secondary/
workspace LBA values.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
The used slots in the phys disk table aren't necessarily the
first ones. Rather, unused entries are represented by entries
where the GUID is all 0xff.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Use get_pd_index_from_refnum() in get_extents to determine
matching VD. This will ensure RAID 10 (secondary RAID level)
support, too.
This also fixes a bug in the previous get_extents() code (missing
__be16_to_cpu for conf.prim_elmnt_count).
DDF test case (10ddf-create) verified.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Remove the lba_offset field from struct vcl. This field acted as
a "cache" for the address of the lba_offset field in the vd_config
structure. This isn't useful any more if there are multiple
vd_configs in a vcl.
This patch also adds __cpu_to_be64 in two places where it has been
quite obviously forgotten (ddf_set_disk, ddf_activate_spare).
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Make validate_geometry_ddf() use the same logic to check supported
RAID levels that init_super_ddf_bvd() uses.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Properly initialize the data structures of the other BVDs
in Create().
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Instead of allocating the other_bvds array and every element
separately, allocate all in a single chunk. Also, move allocation
in a subroutine as it's used in several places.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Support for RAID 10 makes it necessary to rewrite the algorithm
for deriving DDF layout from MD layout. The functions level_to_prl
and layout_to_rlq are combined in a single function that takes
md layout parameters and converts them to DDF.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
layout_ddf2md() is a new RAID layout conversion routine.
It obsoletes the previous separate routines for obtaining
md level and layout (map_num1, rlq_to_layout).
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
The DDF code was assuming that the VD slots 0..populated_vdes
were used and the rest was unused. Remove this assumption and
deal with empty slots instead.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Implement logic to derive the status of a secondary RAID
from its members. Use it in ddf_set_disk.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Moved code to determine RAID status to a separate function
get_bvd_status(). I need this to account for secondary RAID level.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
If secondary RAID level is taken into account, translation between
the md RAID member (raid_disk) and the index of a physical disk
in a BVD becomes more complex.
Also, take into account that the member list can have unused entries
(this is independent of secondary RAID level).
Adapt usage of find_vdcr() accordingly
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This patch implements the previously unsupported case where
store_super_ddf is called with a non-empty superblock.
For DDF, writing meta data to just one disk makes no sense.
We would run the risk of writing inconsistent meta data
to the devices. So just call __write_init_super_ddf and
write to all devices, including the one passed by the caller.
This patch assumes that the device to store the superblock on
has already been added to the DDF structure. Otherwise, an
error message will be emitted.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
The DDF spec mandates that the "open flag" be set to non-0 before
writing a configuration, and reset to 0 when finished to indicate
success.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
When the primary header can't be read, use the secondary header
as fallback.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This allows the metadata on a device to be saved and later restored.
This can be useful before experimenting on an array that is misbehaving.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Fix bug in previous patch
"DDF: compare_super_ddf: merge local info of other superblock"
Just discovered this bug in my last patch set - unfortunately, just after
you committed it.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
The 10ddf-create test case fails sporadically because wrong meta
data is written, making the array appear inconsistent when it's
restarted. Added code to aid debugging this.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Commit c1ea5a98 caused brief_detail_super_ddf() to be called
for subarrays. But the UUID printed was always the one of the
container. This is wrong and actually worse than printing no UUID
at all, and causes the DDF test case (10ddf-create) to fail.
This patch adds code to determine the MD UUID of a subarray correctly.
The hard part is to figure out for which subarray the function is
called. Moved that to an extra function.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
It's not necessary to check for 0xffffffff, which is a valid
sequential number.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
If a match is found in compare_super_ddf, check the other SB
for local DDF information (VD config records, physical disk data)
which is not available in the current superblock, and add it
if needed.
This is important for the mdmon - when disks are added to a
auto read-only array, they must be present in the DDF structure
in order to guarantee consistent writeback of metadata to all
disks.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Besides container GUID, also check seqnum, physical and virtual
disk numbers, and check match between local and global sections.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
When writing back the DDF structure, make sure that on each disk
we write the configs that include this disk even if a secondary
RAID level is present. Otherwise the secondary RAID will not be
read correctly any more when we open the device next time.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Check for supportable secondary RAID configurations.
There is currently only one: RAID 10, if the stripe
sizes and Basic volume sizes are all equal.
With this patch, mdadm will not try to start unsupported
secondary RAID level configurations any more.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown
mwilck@arcor.de