If a distribution allows the choice between using mdadm and
dmraid for DDF and IMSM to be made by some config file
(/etc/defaults/ /sys/sysconfig/ etc) which is queried by
/etc/init.d scripts, then the fact that mdadm implements this
choce through the config file is not very helpful.
So allow the "AUTO" line to be specified in part using MDADM_CONF_AUTO
in environment.
Signed-off-by: NeilBrown <neilb@suse.de>
As we now support config directories it is helpful if
lines are allowed to occur multiple times with one
over-riding the other.
So stop giving warnings when later lines are ignored.
Signed-off-by: NeilBrown <neilb@suse.de>
If a configfile is explicitly given, just that file or directory
is read. Otherwise we now read both a file
/etc/mdadm.conf
and a directory
/etc/mdadm.conf.d
This allows a transition to directory based config, which in turn
allows easy control from scripts.
Signed-off-by: NeilBrown <neilb@suse.de>
If config file is a directory, process each file within with a name
ending in ".conf" that doesn't start with ".".
Files are processed in lexical order.
Signed-off-by: NeilBrown <neilb@suse.de>
Without this, array may not go clean and mdmon will then
not exit.
A safe_mode of '0' (which is the only one that is handled differently
by this patch) means "never switch to 'active_idle'". We don't want
that when mdmon is stopping.
Signed-off-by: NeilBrown <neilb@suse.de>
If all devices have the same event count and the first one is a spare,
then that spare will be the 'most_recent'.
However then other devices will think the 'most_recent' has failed
(for v0.90 metadata) and will be rejected from the array.
So never consider a 'spare' to be 'most recent'.
Reported-by: Andreas Baer <synthetic.gods@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
The Anaconda installer (via its "loader" program) will try to kill
many processes at shutdown, but not "mdmon".
However when mdadm runs mdmon in the Anaconda environment, mdmon
sets argv[0][0] to '@' resulting in "@dmon" which confuses
"loader".
So change mdadm to set argv[0] to a path so that mdmon becomes e.g.
"@usr/sbin/mdmon"
which "loader" will recognise as being "mdmon".
Reported-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Since:
commit 84d11e6c6a
Author: NeilBrown <neilb@suse.de>
Date: Thu Aug 1 11:16:14 2013 +1000
Grow: exit background thread cleanly on SIGTERM.
removed the setting of "sync_max" from abort_reshape() we need
to do it explicitly here.
Signed-off-by: NeilBrown <neilb@suse.de>
On some systems, this code caused a "comparison between signed
and unsigned" error.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
That is the same value that IMSM uses. The current default of 200ms
seems to have been copied from the native MD meta data. That value
appears to be much too low for DDF, given that writing the DDF meta
data means that easily several MB worth of data need to be written to
disk.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Set safe_mode_delay to something >0, otherwise all container subarrays
assembled will have safe_mode_delay=0. That will break the assumption that
meta data becomes clean after running mdadm --wait-clean.
Use the same value as in getinfo_super_ddf_bvd. It would be cleaner
to call that directly from container_content_ddf, but I need to check
possible side effects first.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Have mdadm -E --export print the number of RAID devices,
like other meta data formats do. Anaconda (RHEL/CentOS installer)
depends on it.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
At this point 'di' and 'rv' both have the same value. gcc doesn't
realise that and a human reader might not either.
'rv' makes more sense too, so use that.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Current "mdadm --run /dev/mdX" will not handle external metadata
properly. mdmon won't be started etc.
So use the code from "mdadm -IRs" instead - that already does all
the right things.
Reported-by: Francis Moreau <francis.moro@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
commit 23bf42cc79
super1: simplify setting of array size.
removed the setting for sb->data_offset for 1.0 metadata for some reason,
and messed up the size calculation for 1.0 metadata too.
Signed-off-by: NeilBrown <neilb@suse.de>
It is possible that mdadm creates a new subarray containing failed
devices. This may happen if a device has failed, but the meta data
containing that information hasn't been written out yet.
This code tests for this situation, and handles it in the monitor.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
If a disk fails and simulaneously a new array is created, a race
condition may arise because the meta data on disk doesn't reflect
the disk failure yet. This is a test for that case.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This is one more unit test for failure/recovery, this time with
double redundancy, which isn't covered by the other tests.
Signed-off-by: NeilBrown <neilb@suse.de>
An ext[234] filesystem larger than 2TB was beign reported with
a negative size - which looks odd.
So fix it to use suitably large and unsigned values.
Reported-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: NeilBrown <neilb@suse.de>
The recent change to skip over invalid conf entries was bad because
it could leave garbage on the disk.
But we don't to write each entry separately as the writes a O_DIRECT
and so synchronous so it takes way too long.
So allocate a large buffer (probably the one used to read the config records)
and fill that then write it all at once.
Reported-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Allow other device types for testing; this allows to test on
a larger variety of devices.
Option --dev=[loop|lvm|ram] selects loop device (default), lvm,
and ram disk, respecively. To use RAM disks with DDF,
the kernel parameter ramdisk_size=65536 must be used.
For LVM, use --volgroup=<vg> to specify the name of the volume
group in which the test LVs will be created.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
We should skip known failed disks when allocating space for
new arrays. This fixes the problem with 10ddf-fail-spare.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This test has some randomness because it is not always deterministic
which of the two arrays gets the spare and which remains degraded.
Handle it.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
helper functions to determine the list of devices in an array,
etc.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
mdadm default to using /run/mdadm. However not all distros
provide /run yet. This can confuse people who build their own
mdadm.
So have "make" complain if the given directory doesn't exist.
This will make it harder to build an mdadm which doesn't work.
Reported-by: Albert Pauw <albert.pauw@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
It is possible for mdmon to see (in /proc/mdstat) and array
in 'inactive' state, "mdadm -S" has written "inactive" to
"array_state".
In this state values such as "raid_disk" are not meaningful
and so should be ignored by manage_member().
Reported-by: "Dorau, Lukasz" <lukasz.dorau@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Commit c7079c84 arrange for DDF to forget about any device
that is failed and not still marked as part of any array.
However such devices could still be part of the container and this
removal and updating of 'pdnum' can result in multiple devices having
the same pdnum. This in turn easily leads to confusion and
corruption.
So only discard pd entries for devices which are failed, not listed in
any virtual device, and for which we don't have a handle on the
device.
pd entries will not get removed until a new device is added after
the device has been removed from the container, either by
"mdadm --remove" or by assembling without the failed devices.
Reported-by: Albert Pauw <albert.pauw@gmail.com>
Analysed-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
When testing we want to run mdmon directly, not use
systemctl to get systemd to run it.
So allow an environment variable to make that choice.
Signed-off-by: NeilBrown <neilb@suse.de>
This clearly should be 'st2'.
As it is the 'raid_disk' value being tested is completely
meaningless in the context of the new device.
Signed-off-by: NeilBrown <neilb@suse.de>
Recent commit 273989b93a
skipped writing some large blocks of 0xFF, but didn't seek
over the space, so subsequent data was written wrongly.
When we don't write, we need to seek.
Signed-off-by: NeilBrown <neilb@suse.de>
With the previous patch, mdmon will provide the layout property for us.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
commit 71d68ff62 uses the array layout. It needs to be initialized.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Now that mdmon responds fairly well to SIGTERM, stop lying to
systemd about being started on the initrd.
Note that if mdmon is rerun (--takeover) for some reason, and systemd
chooses to kill processes before remounting / readonly, then the
unmount will hang.
If systemd ever lets us tell it that we don't want to be killed until
root is readonly, then we should do that.
Signed-off-by: NeilBrown <neilb@suse.de>
The purpose od devid2devnm is to return a kernel name of an
md device, whether that device is a whole device or a partition,
we want the whole device. md4, never md4p2.
In one place I was using devid2devnm where I really wanted the
partition if there was one ... and wasn't really interested in it
being an md device.
So introduce a new 'devid2kname' for that case.
Signed-off-by: NeilBrown <neilb@suse.de>
Telling systemd that mdadm was started from the initrd
is often a lie and never necessary. Now that the reshape monitoring
thread handles SIGTERM gracefully it is OK for system to kill
and mdadm that it finds running.
mdmon still have a bit of a question mark over it so I won't remove
the '@' from there just yet.
Signed-off-by: NeilBrown <neilb@suse.de>
If the mdadm thread that monitors a reshape gets SIGTERM it should
exit cleanly and clear the 'suspended' region of the array.
However it mustn't clear 'sync_max' as that would allow the
reshape to continue unmonitored.
If the thread ever does get killed, the array should really be
shutdown soon after if possible.
Signed-off-by: NeilBrown <neilb@suse.de>
I forgot to check in this helper script, similar to the one for IMSM.
It is needed by tests/10ddf-create-fail-rebuild.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This test adds a new unit test similar to 009imsm-create-fail-rebuild.
With the previous patches, it actually succeeds on my system.
Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown
mwilck@arcor.de