We shouldn't call remove_partitions until we have made a really firm
decision to include the device into the array.
Signed-off-by: NeilBrown <neilb@suse.de>
As chunk_size in mdstat_ent is never set, we shouldn't copy
it into a->info.array.
In fact, it is safest to get rid of the field altogether.
Reported-by: "Kwolek, Adam" <adam.kwolek@intel.com>
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>
I'm seen mdadm spinning while failing to read 'degraded'.
This doesn't really fix it, but is a reminder that it needs to be
fixed.
Signed-off-by: NeilBrown <neilb@suse.de>
If we can't read actual disk state, it shoud be initiated
to 0.
Overwise it may be out of date value resulting false action
later in code (e.g. set disk to improper state).
Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Due to a miscalculation we didn't initialise the whole file.
There is 4K (8 sectors) for the metadata, then the data.
Signed-off-by: NeilBrown <neilb@suse.de>
Before resizing an array with --size or --array-size, then filesystem
should be resized. mdadm cannot do this so the user should.
Reported-by: Gavin Flower <gavinflower@yahoo.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When opening an array to manipulate it we never need to write to the
array and sometimes it might be read-only so the open for write will
fail.
So always open read-only.
Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
If a device is failed, then don't include it in the reported
container_content, else it might get included in the array.
Reported-by: Albert Pauw <albert.pauw@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
We somehow got to version of documentation for --array-size.
So merge them it one.
Reported-by: Ville Skyttä <ville.skytta@iki.fi>
Signed-off-by: NeilBrown <neilb@suse.de>
Hi Neil,
I noticed that the -Y option, as in mdadm -D -Y /dev/md0, doesn't work
but used as --export it works.
So I made a little patch to fix it, but it is simply sticking a Y in the
list of short_options in ReadMe.c.
Signed-off-by: NeilBrown <neilb@suse.de>
When we force-assemble an array which is in the middle of a reshape,
we should repeat the reshape of any parts that aren't recorded in
the oldest superblock.
This is unlikely to make a significant difference, but could make
a small difference, and is safer.
Signed-off-by: NeilBrown <neilb@suse.de>
If a request to remove all 'failed' or 'detached' devices chooses to
remove the first device, it will not actually try the removal and will
skip any following devices.
This fixes it.
Reported-by: Rémi Rérolle <rrerolle@lacie.com>
Tested-by: Rémi Rérolle <rrerolle@lacie.com>
Signed-off-by: NeilBrown <neilb@suse.de>
# mdadm --detail --export /dev/md127p1
Before:
MD_LEVEL=raid5
MD_DEVICES=4
MD_METADATA=0.90
After:
MD_LEVEL=raid5
MD_DEVICES=4
MD_CONTAINER=/dev/md0
MD_MEMBER=0
MD_UUID=55746a20:925d24a7:4f9bd7e2:9c9a411f
We parse the symlink target with a format:
../../block/mdXXX/mdXXXpYY
...and need the second '/' from the end of the string to read detect a
'md' device.
Reported-by: Krzysztof Wasilewski <krzysztof.wasilewski@intel.com>
Cc: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When calling mdadm -C --metadata=imsm -l 1 /dev/sd..
mdadm segfaults in default_chunk_imsm()
above syntax is incorrect, but mdadm should error instead of segfaulting
Signed-off-by: Luca Berra <bluca@comedia.it>
Signed-off-by: NeilBrown <neilb@suse.de>
- other differences between 0.90 and 1.x metadata explained
- reshape text enhanced to properly acknowledge shrinks and in-place
reshapes, particularly in the context of --backup-file.
Signed-off-by: NeilBrown <neilb@suse.de>
This code is wrong is several ways, and failed on big-endian machines.
Put in correct endian coversions: 'want' is cpu-order, dev_roles[] is little-endian,
16 bit.
Reported-by: Doug Nazar <nazard.michi@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
If udev is not in use, we create device in /dev when assembling
arrays and remove them when stopping the array.
However it may not always be correct to remove the device. If
the array was started with kernel auto-detect, them mdadm didn't
create anything and so shouldn't remove anything.
We don't record whether we created things, so just don't remove
anything with a 'standard' name. Only remove symlinks to the
standard name as we almost certainly created those.
Reported-by: Petre Rodan <petre.rodan@avira.com>
Signed-off-by: NeilBrown <neilb@suse.de>
/dev could be read-only in which case we cannot make devices
there.
So dev_open should first try to use an existing device name,
and if that doesn't work try creating a node in /dev or /tmp.
Reported-by: Paweł Sikora <pluto@agmk.net>
Signed-off-by: NeilBrown <neilb@suse.de>
Commit 3a6ec29ad5 stopped us from adding apparently-working devices
to an active array with --incremental as there is a good chance that they
are actually old/failed devices.
Unfortunately it also stopped spares from being added to an active
array, which is wrong. This patch refines the test to be more
careful.
Reported-by: <fibreraid@gmail.com>
Analysed-by: Dan Williams <dan.j.williams@intel.com>
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>
Commit 97b4d0e9 "Incremental: honor an 'enough' flag from external
handlers" introduced a regression in that it changed the error return
code for successful invocations.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Ignacy Kasperowicz <ignacy.kasperowicz@intel.com>
Having multiple possible locations and guessing where best to put the
file is too messy, confusing and makes locking problematic.
So just keep it in /dev/.mdadm/map. It is a horrible place but it is
really all we have. System integrators can change this easily at
build time.
Signed-off-by: NeilBrown <neilb@suse.de>
nr_disks is just wrong here - the arrays need room for all disk slots,
even if some are empty, plus spares, plus a possible backup file.
So raid_disks is correct.
Signed-off-by: NeilBrown <neilb@suse.de>
There 'rv' tests were confused and sometimes wrong.
This resulted in not writing the second bsb.
Also fix the test script so the the critical section is long enough
that we have some hope of interrupting it.
Signed-off-by: NeilBrown <neilb@suse.de>
The loop for loading it was hard to follow, so restructure that
and avoid a theoretical use-before-set error.
Also there was a second 'info' structure which hid the first and was
pointless.
Signed-off-by: NeilBrown <neilb@suse.de>
The 'container_enough' changes fliped the default from assembling
an array as soon as we possibly could, to assembling only when all
expected devices are present.
This broken 09imsm-assemble which expects the original default.
So change from "-I" to "-IR" to restore the expected behaviour.
Signed-off-by: NeilBrown <neilb@suse.de>
The container_enough code change broke ddf as ddf never claimed
'enough' devices. So change it to always claim 'enough' to
restore previous behaviour.
Signed-off-by: NeilBrown <neilb@suse.de>
1/ and extra local var was declared, which causes rv setting
to be lost
2/ a -ve rv was left -ve while we should be return 1 on err.
Signed-off-by: NeilBrown <neilb@suse.de>
- Update the comments
- use some defined names instead of magic numbers.
- restore /var/run/mdadm/map to have priority over /dev/.mdadm/map
Signed-off-by: NeilBrown <neilb@suse.de>
It turns out that /lib/init/rw doesn't exist in early boot
like I thought. So give up on that idea and just use
/dev/.mdadm/ for files that must persist from early-boot
to regular boot.
Signed-off-by: NeilBrown <neilb@suse.de>
While we attempt to use a lockfile to grant exclusive access to the
mapfile, our implementation is buggy. Specifically, we create a lockfile,
then lock it, at which point new instances can open the lockfile and
attempt to lock it, which will cause them to block. However, when we are
ready to unlock it, we unlink the file. This causes existing lock waiters
to get a lock on an unlinked inode while a different instance may now
create a new lockfile and get an exclusive lock on it.
There are several possible fixes. The chosen one is to test if
->s_nlink is zero after we get the lock and to retry if it isn't.
This means:
- failing to unlink a file doesn't leave a stale lock
- we can block waiting to get a lock rather than busy-waiting
- we don't need to leave a lock file permanently in place.
Reported-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
