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>
DDF raid6 layouts are subtly different from the standard 'md' layouts.
From 2.6.30 the kernel knows about these.
Teach mdadm about them, and also allow 'ddf' to set an appropriate default.
Signed-off-by: NeilBrown <neilb@suse.de>
Currently Incremental_container is being called after adding each disk.
In the imsm case where spares are not tracked in the raid_disks field we
can use --no-degraded to block premature assembly.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Metadata formats like imsm work in concert with platform firmware and
hardware, so provide a way for mdadm to display this info to the user.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Its cumbersome to determine which devices to wait for in a system shutdown
script, so hook up --scan.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Auto-assembly and planned assembly don't really work well together,
it can be confusing.
In particular in mkinitrd or similar creates an mdadm.conf to
assemble a particular array, we shouldn't go assembling any
other arrays as well.
If you want auto assembly, you need to give mdadm a config
file with no ARRAY lines.
mdadm -Ascpartitions
can do this.
Signed-off-by: NeilBrown <neilb@suse.de>
Try to treat members of containers much like other arrays for
assembly.
We still look through the list of devices for a match (it will be
the container), then find the relevant 'info' and try to assemble
the array.
Signed-off-by: NeilBrown <neilb@suse.de>
i.e. in mdadm.conf you can have a line like
ARRAY uuid=whatever
and it will use auto-name-generation to give a name to the array at
assemble-time. The is different from blind auto-assembly in that the
array will be treated as 'local'.
We will shortly be feeding more information into the process of
creating array devices, so delay the creation. Still open them
early if the device already exists.
This involves making sure the autof flag is in the right place
so that it can be found at creation time.
Also, Assemble, Build, and Create now always close 'mdfd'.
Signed-off-by: NeilBrown <neilb@suse.de>
When
mdadm --assemble /dev/whatever
is given, mdadm will treat it as though '--scan' were given, even
though it wasn't.
In this case, the code opens /dev/whatever twice, which is pointless.
We already know /dev/whatever is open at this point, so remove the
'open' and the tests, and make sure it is always closed afterwards.
Signed-off-by: NeilBrown <neilb@suse.de>
This reflect that fact that more often than not it is creating things
in /dev, and allows for a new open_mddev which does just that.
Signed-off-by: NeilBrown <neilb@suse.de>
Previously it was possible to set the WRITEMOSTLY flag when
adding a device to an array, but not to clear the flag when re-adding.
This is now possible with --readwrite.
Signed-off-by: NeilBrown <neilb@suse.de>
For use in distro shutdown scripts with a RAID root file system.
Returns immediately if the array is 'readonly', or not an externally
managed array. It is up to the distro's scripts to make sure no new
writes hit the device after this returns 'true'.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
If an array is being managed by mdmon, then just
write "inactive" to stop it, and let mdmon do the
final "clear". This makes sure mdmon has a chance
to read the final state and update the metadata properly.
After writing "inactive" with use "ping_monitor" to synchronise
with mdadm, then STOP the array just in case it is still running,
else we will get into an infinite loop in "mdadm -Ss".
Signed-off-by: Neil Brown <neilb@suse.de>
1/ close a race where multiple arrays disappear at once
and monitor isn't woken up to find out that the last one
has gone.
2/ "mdadm -Ss" needs to pause briefly for mdmon to exit.
If you have stacked arrays, then
mdadm -As --homehost=fred
should work but doesn't. It gets into an infinite loop!
So write some tests, and fix the bugs.
The current model for creating arrays involves writing
a superblock to each device in the array.
With containers (as with DDF), that model doesn't work.
Every device in the container may need to be updated
for an array made from just some the devices in a container.
So instead of calling write_init_super for each device,
we call it once for the array and have it iterate over
all the devices in the array.
To help with this, ->add_to_super now passes in an 'fd' and name for
the device. These get saved for use by write_init_super. So
add_to_super takes ownership of the fd, and write_init_super will
close it.
This information is stored in the new 'info' field of supertype.
As part of this, write_init_super now removes any old traces of raid
metadata rather than doing this in common code.
From: Ian Dall <ian@beware.dropbear.id.au>
I have a small patch to mdadm which allows the write-behind amount to be
set a array grow time (instead of currently only at grow or create
time). I have tested this fairly extensively on some arrays built out of
loop back devices, and once on a real live array.
From: Doug Ledford <dledford@redhat.com>
This one fixes a bug where once manage mode is set, the -a short option
is no longer parsed correctly (true of grow mode as well). This happens
because when you switch the short opts to the bitmap_auto version, it
specifies that the argument must follow a, yet the loop expects to get
an undecorated option and parse it as the disk dev instead of trying to
parse optarg. So, create a new short opt array that is used for manage
and grow that doesn't list a as having an argument.
udev likes to get information about a device as key=value pairs so it
can create disk/by-id links etc. So add --export flag which causes
the output of --detail to easily parsable.
From: Kay Sievers <kay.sievers@novell.com>
This can be used to bootstrape homehost tagging.
If no arrays are found that are tagged, we look for any array
and tag it.
Signed-off-by: Neil Brown <neilb@suse.de>
When an array is created, if the homehost is know,
the superblock gets it, either in the uuid, (via sha1)
or in the name field.
Signed-off-by: Neil Brown <neilb@suse.de>
Use to avoid starting arrays if there are
fewer devices available than last time the array was started.
This is only needed with --scan, as with --scan, that behaviour
is the default.
Signed-off-by: Neil Brown <neilb@suse.de>
So when you say auto=md or auto=part in mdadm.conf, it give a preference
for type of array, but standard name will override.
But --auto=md is more insistant.
FIXME I'm not at all happy about handling of names that already exist.
I don't think that should be removed if the device is active.
Signed-off-by: Neil Brown <neilb@suse.de>
When creating a file bitmap, choose a default size that
results in fewer than 2^21 chunks. Without this kmalloc
failure in the kernel becomes likely.
Signed-off-by: Neil Brown <neilb@suse.de>
To support resizing an array without a spare, mdadm now understands
--backup-file=
which should point to a file for storing a backup of critical data.
This can be given to --grow which will create the file, or
--assemble which will restore from the file if needed.
Signed-off-by: Neil Brown <neilb@suse.de>
- report Intent Bitmap in --detail
- report internal bitmap in --examine
- pass' --force through to --grow --bitmap
- support v.large arrays in --grow --bitmap
Signed-off-by: Neil Brown <neilb@suse.de>
i.e. allow '--help' to be first and still give
context sensitive help.
Also don't print truncated device-size of very large arrays.
Signed-off-by: Neil Brown <neilb@suse.de>
clean up 'long long' usage for size of array, so that
with v-1 superblocks a raid1 larger than 2TB is possible.
Signed-off-by: Neil Brown <neilb@suse.de>
From: ross@jose.lug.udel.edu (Ross Vandegrift)
Hi Neil,
While adding the text message mode, I saw a FIXME asking for syslog
support in monitor mode.
This patch adds exactly that.
Signed-off-by: Neil Brown <neilb@suse.de>
If a bad file names was given, exit status still 0.
If some devices couldn't be stopped for "mdadm -Ss"
exit status still 0.
Thanks: Daniel Hottinger <hotti@google.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Support "--build"ing arrays with bitmaps.
hot-removal of bitmaps
--re-add of drives recently removed.
assorted extra tests
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Currently this includes
--write-behind to set level of write-behind supported
--write-mostly to flag devices as write-mostly.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
As the device list isn't stable, recording it should be avoided.
The device= list is still available if --verbose is given (once).
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
This allows the check to be done after we know what
metadata format is being used, and so the max number of raiddisks
is known.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
