When we allowed a devlist to accompany some --grow modes - but not
--bitmap - we made --bitmap always fail, in stead of fail of a device
was given to add.
As 'devs_found' includes the md device, we need to compare against
'1'.
Signed-off-by: NeilBrown <neilb@suse.de>
This is done via conversion to RAID4 and back.
To grow the array, extra devices will be needed which cannot
already be present as spares - so allow a list of new devices
to be included in grow request which changed the number of devices.
Signed-off-by: NeilBrown <neilb@suse.de>
Neil,
Please consider this patch that once was discussed and I think agreed with in general direction. It was sent a while ago
but somehow did not merged into your devel3-2. This patch enables hot-plug of so called bare devices (as understand by domain policies rules in mdadm.conf).
Without this patch we do NOT serve hot-plug of bare devices at all.
Thanks,
Marcin Labun
Subject was: FW: Autorebuild, new dynamic udev rules for hot-plugs
>>From c0aecd4dd96691e8bfa6f2dc187261ec8bb2c5a2 Mon Sep 17 00:00:00 2001
From: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
Date: Thu, 23 Dec 2010 16:35:01 +0100
Subject: [PATCH] Dynamic hot-plug udev rules for policies
Cc: linux-raid@vger.kernel.org, Williams, Dan J <dan.j.williams@intel.com>, Ciechanowski, Ed <ed.ciechanowski@intel.com>
When introducing policies, new hot-plug rules were added to support
bare disks. Mdadm was started for each hot plugged block device
to determine if it could be used as spare or as a replacement member for
degraded array.
This patch introduces limitation of range of devices that are handled
by mdadm.
It limits them to the ones specified in domains associated with
the actions: spare-same-port, spare and spare-force.
In order to enable hot-plug for bare disks one must update udev rules
with command
mdadm --activate-domains[=filename]
Above command writes udev rule configuration to stdout. If 'filename'
is given output is written to the file provided as parameter. It is up
to system administrator what should be done later. To make such rule
permanent (i.e. remain after reboot) rule should be writen to
/lib/udev/rules.d directory. Other cases will just need to write it to
/dev/.udev/rules.d directory where temporary rules lies. One should be
aware of the meaning of names/priorities of the udev rules.
After mdadm.conf is changed one is obliged to re-run
"mdadm --activate-domains" command in order to bring the system
configuration up to date.
All hot-plugged disks containing metadata are still handled by existing
rules.
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This is useful with 1.1 and 1.2 metadata to update the metadata if
the device size has changed.
The same functionality can be achieved by writing to the device size
in sysfs after re-adding normally, but in some cases this might be
easier.
Signed-off-by: NeilBrown <neilb@suse.de>
Growing an array when there aren't enough spares can make the array
degraded. This works but might not be what is wanted.
So warn the user in this case and require a --force to go ahead
with the reshape.
Signed-off-by: NeilBrown <neilb@suse.de>
Check on upper limit of number of devices was in the wrong place.
Result was could not create array with more than 27 devices without
explicitly setting metadata, even though default metadata allows more.
Fixed, and also perform check when growing an array.
Signed-off-by: NeilBrown <neilb@suse.de>
Though not having the proper backup file can cause data corruption, it
is not enough to justify not being able to start the array at all.
So allow "--invalid-backup" to be specified which says "just continue
even if a backup cannot be restored".
Signed-off-by: NeilBrown <neilb@suse.de>
We already allow K,M,G suffixes for --size and --array-size.
Allow it for --chunk and --bitmap-chunk as well.
Also add this info to man page, and remove the duplication of info
about --array-size.
Signed-off-by: NeilBrown <neilb@suse.de>
In several cases, two different long options map to the same short
option. So e.g. you could give '--brief' and it would be interpreted
as '--bitmap'. That isn't really good.
So for every shared short option, define an option number and return
that for the long option instead. Then always check for both the
short and long options.
Also give some bugs like " mode == 'G'" which should be '== GROW'.
Signed-off-by: NeilBrown <neilb@suse.de>
--no-sharing option disables moving spares between arrays/containers.
Without the option spares are moved if needed according to config rules.
We only allow one process moving spares started with --scan option.
If there is such process running and another instance of Monitor
is starting without --scan, then we issue a warning but allow it
to continue.
Signed-off-by: Anna Czarnowska <anna.czarnowska@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
<path-id> allows to identify the port to which given device is plugged
in. In case of hot-removal, udev can pass this information for future
use (eg. write this name as 'cookie' allowing to detect the fact of
reinserting device to the same port).
--path <path-id> parameter has been added to device removal handle
(and char *path has been added to IncrementalRemove() to pass this
value) in order to pass path-id to this handler.
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Now that the next_member loop is much smaller it is easy to
just use 'content' rather than stashing it in 'tmpdev->content'.
So we can remove the 'content' field from 'struct mddev_dev'.
Signed-off-by: NeilBrown <neilb@suse.de>
Remove the _t pointer typedef and remove the _s suffix for the
structure,
These things do not help readability.
Signed-off-by: NeilBrown <neilb@suse.de>
Commit 3288b419 (Revert "Incremental: honor --no-degraded to delay assembly")
killed the --no-degraded flag since commit 97b4d0e9 (Incremental: honor
an 'enough' flag from external handlers) made this the default behavior
of -I, and brought -I usage for external/container formats in line with
native metadata. However, this breaks existing usages of '-I
--no-degraded', so allow it as a deprecated option.
Starting a degraded container, like the native metadata case, requires -R.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Ignacy Kasperowicz <ignacy.kasperowicz@intel.com>
--test can be given in Manage mode.
This can be used when there is an attempt to fail or remove 'faulty',
'failed' or 'detached' devices, or to re-add 'missing' devices.
If no devices were failed, removed, or re-added, then mdadm will
exit with status '2'.
Signed-off-by: NeilBrown <neilb@suse.de>
This can be used for hot-unplug. When a device has been remove,
udev can call
mdadm --incremental --fail sda
and mdadm will find the array holding sda and remove sda from
the array.
Based on code from Doug Ledford <dledford@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Allow the name of the array stored in the metadata to be updated. In
some cases the metadata format may not be able to support this rename
without modifying the UUID. In these cases the request will be blocked.
Otherwise we allow the rename to take place, even for active arrays.
This assumes that the user understands the difference between the kernel
node name, the device node symlink name, and the metadata specific name.
Anticipating further need to modify subarrays in-place, introduce the
->update_subarray() superswitch method. A future potential use
case is setting storage pool (spare-group) identifiers.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Support for deleting a subarray out of a container. When all subarrays
are deleted the component devices are converted back into spares, a
--zero-superblock is still needed to kill the remaining metadata at this
point. This operation is blocked when the subarray is active and may
also be blocked by the metadata handler when deleting the subarray might
change the uuid of other active subarrays. For example, with imsm,
deleting subarray 'n' may change the uuid of subarrays with indexes > n.
Deleting a subarray needs to be a container wide event to ensure
disks that record the modified subarray list perceive other disks that
did not receive this change as out of date.
Notes:
The st->subarray parsing in super-intel.c and super-ddf.c is updated to
be more strict now that we are reading user supplied subarray values.
Offline container modification shares actions that mdmon typically
handles so promote is_container_member() and version_to_superswitch()
(formerly find_metadata_methods()) to generic utility functions for the
cases where mdadm performs the operation.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This reverts commit fdb482f99b.
Now that containers can report state for ->container_enough we can
automatically determine when the array can be started, and no longer
need the --no-degraded hammer.
Conflicts:
Incremental.c
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Currently "mdadm -As" will process the entries in the config
file in order. If any array is a component or member of a preceding
array, that array will not be assembled.
So if there are any failures during assembly, retry those arrays,
and look until everything is assembled, or nothing more can
be assembled.
Signed-off-by: NeilBrown <neilb@suse.de>
Most operations require root access. Rather than ensure we generate
the right error message when something fails because we aren't root,
check early.
Note that "--examine" does not necessarily require root, so test
for that first.
Resolves-Debian-bug: 396570
Signed-off-by: NeilBrown <neilb@suse.de>
mdadm should not wait indefinitely when it trys to reset
superblock on device which is busy (cannot be opened).
Acked-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
- When --kill-superblock is used with --metadata, find every
different superblock if there are several and kill them all.
- When creating a new array, kill off any old metadata. The code
to do this was already present but has become broken over time.
Signed-off-by: NeilBrown <neilb@suse.de>
A change the reduces the size of an array always happens
before any other change. So it can cause data to be lost.
By themselves these changes are reversible. But once another
change has started, the data would be permanently lost.
So recommend data integrity be checked between a size change
and any other change.
Signed-off-by: NeilBrown <neilb@suse.de>
ie. the percent increments after which RebuildNN event is generated
This is particulary useful when using --program option, rather than
(only) syslog for alerts.
Signed-off-by: Zdenek Behan <rain@matfyz.cz>
Signed-off-by: NeilBrown <neilb@suse.de>
Connect to the monitor in the old namespace and use that connection for
WaitClean requests when stopping the victim mdmon instance. This allows
ping_monitor() to work post chroot().
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1/ allow --size to be given with 'G' or 'T' suffix.
2/ allow size to exceed 32bits, and in that case write through sysfs.
Signed-off-by: NeilBrown <neilb@suse.de>
This allows the layout to be parsed after the current level of the
array is know, so that the level doesn't need to be given (otherwise
pointlessly) on the command line.
Signed-off-by: NeilBrown <neilb@suse.de>
Bother Manage_reconfig and Grow_reshape provide for changing
the 'layout' of a faulty array. This is no necessary.
So discard Manage_reconfig and just use Grow_reshape
Signed-off-by: NeilBrown <neilb@suse.de>
With 2.6.30 it is possible to tell the md driver to clip an array to a
size smaller than the real size of the array. This option gives
access to that feature. The size change does not persist
across restarts.
Signed-off-by: NeilBrown <neilb@suse.de>
Since 2.6.16, mdstat responds to select/poll.
So in that case, increase the default poll interval to about 15
minutes.
This ensures that the background load is insignificant.
Signed-off-by: NeilBrown <neilb@suse.de>
If mdadm.conf contains
HOMEHOST <ignore>
or commandline contains
--homehost=<ignore>
then the check that array metadata mentions the given homehost is
replace by a check that the name recorded in the metadata is not
already used by some other array mentioned in mdadm.conf.
This allows more arrays to use their native name rather than having
an _NN suffix added.
This should only be used during boot time if all arrays required for
normal boot are listed in mdadm.conf.
If auto-assembly is used to find all array during boot, then the
HOMEHOST feature should be used to ensure there is no room for
confusion in choosing array names, and so it should not be set
to <ignore>.
Signed-off-by: NeilBrown <neilb@suse.de>
Sometimes we want to ensure particular arrays are never
assembled automatically. This might include an array made of
devices that are shared between hosts.
To support this, allow ARRAY lines in mdadm.conf to use the word
"ignore" rather than a device name. Arrays which match such lines
are never automatically assembled (though they can still be assembled
by explicitly giving identification information on the mdadm command
line.
Signed-off-by: NeilBrown <neilb@suse.de>
This patch enables the --size parameter for build operations.
Without this, if you have a raid1, for instance, where the 2 disks are
not the exact same size, and you need to build the array but one of the
disks is not available right at the moment (maybe it's USB and it's
unplugged, or maybe it's a network disk and it's unavailable), then you
have to play some weird games to get the array to size correctly (that
is, to the size of the smaller of the two components or less).
There may be other uses for this too...
--
Paul
Signed-off-by: NeilBrown <neilb@suse.de>
When reporting "--detail --scan", use names like /dev/md/foo where
available rather than /dev/md/127
This is particularly needed for containers where the member arrays
will report "container=/dev/md/foo" and we want the container to have
the same name.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown
Labun, Marcin
Dan Williams
Anna Czarnowska
Przemyslaw Czarnowski
Artur Wojcik
Zdenek Behan
Paul Clements