* Truncate the first character of the serial number
* Set 'scsi_id' to all f's
* Expect to find disk entries with unmatchable serial numbers, i.e.
expect get_imsm_disk() to return NULL in some situations
* Allow discrepencies between mpb->num_disks and len(super->disks)
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Ensure that the mpb buffer is large enough to hold the extra imsm_map's
of migrating arrays and dynamically created raid devices.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
For example, this allows one to still say mdadm -A /dev/sd[b-e] even
though /dev/sde has replaced /dev/sdd. Otherwise mdadm will say:
mdadm: superblock on /dev/sdd doesn't match others - assembly aborted
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Adding a device updates the container and then mdmon takes action upon
noticing a change in devices. This reuses the container version of
add_to_super to create a new record for the device.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When we have determined that a disk is no longer of any value, remove
it from the data structure. This is now safe because the manager
will back off while any metadata update is pending in the monitor.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
When we first start an array, it might be good to start recovery
straight away. That requires setting the array to 'dirty', but
only the metadata handler can know if that is required or not.
So have a third possible 'consistent' option to set_array_state.
Either 'no' or 'yes' or 'you choose'.
Return value indicates what was chosen.
'1' (no) should be chosen unless there is a good reason.
Signed-off-by: NeilBrown <neilb@suse.de>
1/ Do not assemble !in_sync or failed devices in container_content.
2/ Prevent activation of failed or configured devices in activate_spare.
3/ Be sure to avoid dirty degraded if the array was shutdown cleanly.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
imsm_dev dynamically grows, so dev_idx needs to be moved up in the
definition to avoid getting clobbered.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
With dev->vol.map and mpb->disk entries entering and leaving the parameter
block write_super_imsm needs to update the size before writeback.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Disks that are not in-sync or failed are not assembled into member
arrays by mdadm. Teach mdmon to resolve this situation by checking for
spares at start. imsm_activate_spare() is updated to prefer devices
that can be re-added versus new spares.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The option-rom and the Matrix driver mark resyncs/rebuilds with the
migrate state bits. Update sizeof_imsm_dev to allow allocation of
imsm_dev entries large enough to grow if migr_state is later set.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This poses a small problem for the case of handling multiple raid1 arrays
across separate disk pairs i.e. 2 mirrors on 4 disks. The option-ROM will
configure this as two containers. We may need the capability for one
container to ask for an unused spare in another container. For now spares
will just maintain the affinity established at assemble time.
To support this configuration spare devices must be allowed to be assembled
into the container even though the metadata indicates the disk belongs to a
different family.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
removes the need to lookup the disk by index in a few cases and is a
preparation step for tracking spares outside the current anchor.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This is the initial defensive implementation of bad block management
support. It simply precludes assembly if there are entries in the bad
block logs. This is sufficient for now as the conditions that lead to
an entry in the bad block log would cause the array to be failed by MD
(as of 2.6.27).
[dan.j.williams@intel.com: general cleanups]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Maintaining a single global buffer is unwieldly when extending/rewriting
sections of the metadata. Parse the metadata into component data
structures upon reading and coalesce to a coherent buffer before
writing.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The cmd_filter patch merged for 2.6.27 broke retrieving the serial
number via an ioctl to /dev/sgN. In debugging this I found that other
utilities like sdparm simply run the ioctl on /dev/sdX. So just convert
to that for protection in numbers, but scream on the mailing list for
the inconvenience grr...
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Removes the need for the call to ->set_array_state when sync_action
transitions from 'recover' to 'idle'.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Neil rightly points out that imsm_activate_spare may skip valid free space
on a spare, fix this up.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Following the lead of 75ede16d. This incidentally fixes creation of a second
array by gating call to getinfo_super_imsm_volume with a valid ->current_vol.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Using buffered IO risks non-atomic updates to parts of the
device that we don't actually want to write to. This isn't in
general safe.
So switch to O_DIRECT for all that IO and make sure we have
properly aligned buffers.
When loading the metadata for a subarray (super_by_fd), we set
->subarray to be the name read from md/metadata_version so that
getinfo_super can return info about the correct array.
With this we can differentiate between a container and
an array within the container by looking at ->subarray[0].
Dan Williams
NeilBrown
Jacek Danecki