IMSM OROM limits number of volumes per controller. Volumes
above the limit are blocked in OROM. mdadm should follow OROM limitations
in this area. Therefore we need to count number of volumes on the devices
attached to SATA (ahci driver) or SAS (isci) controller. Adding a new volume
must be blocked if the number of volumes on devices attached to the given
controller is exceeded.
Signed-off-by: Marcin Labun <marcin.labun@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This option is going to be used to load and analyse the metadata from
devices. This is needed to count the number of volumes on devcies attached
to particular Intel controller (SATA or SAS). It shall be done without
activation of container and volumes on the devices.
Signed-off-by: Marcin Labun <marcin.labun@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Prepare function for subsequent changes related to
loading metadata from devices list.
Signed-off-by: Marcin Labun <marcin.labun@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When raid0 reshape is executed mdmon can dissappear due to raid level
takeover operation. If this happen before mdmon check, mdadm would treat
it as error condition. It is not true for this case.
Remove mdmon check from reshape_container() function.
Error condition check will remain using reshape_array() reentry test
for the same array (line 2577).
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
External metadata sometimes is not updated.
It can be observed during 2 raid0 arrays Capacity Expansion.
New array size is not set, because metadata is not updated and on the reshape
end mdadm doesn't read new array size from metadata.
This happens when mdmon finishes his work (due to takeover to raid0),
before all metadata updates are processed.
Make sure that all updates are flushed to disk before executing takeover.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
If there is no name provided for a container by the metadata it is
always appropriate to use the metadata version name. create_mddev
will still add a uniquifying digit to the end so there is little risk
of confusion.
This makes the --incremental code behave the same as the --assemble code.
Signed-off-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
The "char cnt [40]" buffer is sometimes too small to hold all message
- in such case monitor crashes.
The buffer must be larger to be able to hold all message.
Signed-off-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
If a 'remove' fails there is no certainty that another event will
happen soon, so make sure we retry soon anyway.
Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Rather than just a number, use a named flag.
This makes the code easier to understand and allows room for returning
more flags later.
Signed-off-by: NeilBrown <neilb@suse.de>
Adding a bitmap via ioctl can only add it at a fixed location.
That location is not suitable for 4K-block devices.
So allow setting the bitmap location via sysfs if kernel supports it
and aim to always use 4K alignments.
Signed-off-by: NeilBrown <neilb@suse.de>
This is needed on 4K block devices such as DASD as we do O_DIRECT
reads.
Do the same alignment for gpt just to be safe.
Signed-off-by: NeilBrown <neilb@suse.de>
We need to send a "change" event just like we do when
creating an array.
This reverts commit 382afe49b1
The problem is that we need udev to create the file in /dev
for us.
It might be unnecessary for udev to consider assembling things
in this array, but it shouldn't cause a problem. If it did that
would be a different bug which we probably need locking to fix.
Or maybe udev shouldn't trigger a "-I" for containers appearing.
Signed-off-by: NeilBrown <neilb@suse.de>
We were adding 1, presumably to avoid div-by-zero possibilities.
It is better to only substitute '1' if the value actually is zero,
else for small numbers of bits the difference is visible.
Signed-off-by: NeilBrown <neilb@suse.de>
We need to check every disk to see if it has a particular amount of
space spare, not just every subsequent disk.
Signed-off-by: NeilBrown <neilb@suse.de>
Providing --no-sharing is given, monitoring should be permitted.
Unfortunately the kernel current rejects GET_DISK_INFO and
GET_ARRAY_INFO for non-privileged users which is unjustified.
The info is available in sysfs and we could get it from there,
but for now, require the kernel to be fixed.
Reported-by: Raphael Hertzog <hertzog@debian.org>
Signed-off-by: NeilBrown <neilb@suse.de>
When e.g. array name (an) is correct and it is the same as container name (cn),
file element creation /dev/md/an will replace /dev/md/cn.
This can cause that user cannot access container using /dev/md/cn.
Verify during array creation if chosen name is not already existing
one.
[Changed to use map_by_name() rather than stat() to determine prior
existence - NeilBrown]
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
The value in info->array.raid_disks is the total number of
devices, which is the 'after' number when the number is increasing,
and the 'before' number when the number is decreasing.
The code currently assumes it is always the 'after' number - so fix
that.
Signed-off-by: NeilBrown <neilb@suse.de>
When an array is being reshaped to fewer data devices the relationship
between sync_max and reshape_progress is different to when the number
of devices increases - we need to allow for that when setting
sync_max/sync_min.
Signed-off-by: NeilBrown <neilb@suse.de>
In this test we stop and restart an array that is being recovered,
and we do that several times. Sometimes it completes the recovery
before we expect and test results are wrong.
So slow it down a bit more.
Signed-off-by: NeilBrown <neilb@suse.de>
The printed messages should be more appropriate and understandable
for user. If maxsize is equal 0, this means there is no free space left
on device. If size is greater than maxsize, this means there is not enough
space to create a new volume of given size.
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Marcin Labun <marcin.labun@intel.com>
Signed-off-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Make test for all sub arrays having the same number of devices
dependant on the option ROM requirements being checked.
08imsm-overlap disables the OROM check but then fails because this
test causes it to.
Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This fields doesn't work any more as ->getinfo_super clears the info
structure at an awkward time. So get rid of it and do it differently.
The issue is that the metadata handler cannot tell if the uuid it has
was randomly generated or explicitly requested, except on the first
call.
And we don't want to accept explicit requests for IMSM.
So when it was auto-generated, make it look distinctive by having the
same int copied in all 4 positions. If someone requests a uuid like
that, I guess they get away with it.
Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Chunk size only migration for raid0 and raid5 is not possible.
(mdadm UT 15* fails). Mdadm exits with information:
mdadm: imsm unknown layout 0xffffffff for this raid level 0
Problem was introduced in patch (2011-11-16):
imsm: platform capabilities are not validated during level migration
During chunk size migration layout variable is not set correctly.
Set it correctly for this migration type.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
load_imsm_migr_rec() should see difference between no migration record due
to no migration in progress and loading migration record error.
Additional return value (-2) was introduced to this function.
Using new status load_super_imsm_all() can correctly check loading
migration record status.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Add proper error message for container reshape when device cannot be opened.
fd variable operation is moved down to display information what particular
device cannot be opened.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
It can happen during reshape restart that reshape_array() can exit without
error (e.g. Grow.c:1915) and reshape is not moved to next array.
reshape_array() is called again for the same device.
Do not allow for such execution and check if last reshaped array is not
the current one.
This patch can be treat not as solution, but it allows for such errors
detection.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
make everything doesn't compile (again) due to not used function warning
and uninitialized variable.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Add definition:
MIGR_REC_BUF_SIZE
MIGR_REC_POSITION
to super-intel.c and do not use magic numbers
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This patch is addition to patch:
"imsm: FIX: Limit migration record operation by disk slot not by index"
Location of migration record (2 first slots) should be taken on up to date
information. It is in first map.
Change slot verification to use first map only.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
imsm should store migration record in to 2 first disks in array.
This should be evaluated based on disk slots, not on disks index.
It is not guaranteed that indexes are equal to slots.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Maps should not be accessed using "magic numbers" /0, 1,-1/.
Add proper definitions and change all map access to use them.
Change present definitions /MAP_0/MAP_1/ to values already used
in code /0, 1, -1//
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When changes are made to 2nd map, slot in second map should be tested
instead first one /as change will be applied to second map).
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When missing device is handled for rebuild or initialization
end_migration() should be called to merge ords in case additional
degradation.
I've removed this call to end_migration() as it was called
for migration also.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Allow for marking failures in second map during rebuild and initialization
also (not during migration only)
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
During initialization disk failure can occur also. Add code for such case
in imsm_set_disk() to support such event.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Do not allow for spare device activation while rebuild is in progress,
when additional degradation occur.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Rework is needed to map state transition part to allow easier code reading.
After rework it is easy to find out what can happen in what map state
transition.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Ord's merging should occur when rebuild finishes and final state is other
than expected only /additional failures occur during rebuild/.
Exclude array initialization.
Merging ords on migration finish should never happen.
Any failure during migration should be immediately placed in first
/current/ map, so no merge is necessary.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
We shouldn't use longer map. mdadm should know what map is accessed
at the moment.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Labun, Marcin
Adam Kwolek
Lukasz Dorau
Jes Sorensen
NeilBrown
Williams, Dan J