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  1. 03 8月, 2009 7 次提交
    • N
      md: Use revalidate_disk to effect changes in size of device. · 449aad3e
      由 NeilBrown 提交于 
      As revalidate_disk calls check_disk_size_change, it will cause
any capacity change of a gendisk to be propagated to the blockdev
inode.  So use that instead of mucking about with locks and
i_size_write.

Also add a call to revalidate_disk in do_md_run and a few other places
where the gendisk capacity is changed.
Signed-off-by: NNeilBrown <neilb@suse.de>
      449aad3e
    • N
      md: allow raid5_quiesce to work properly when reshape is happening. · 64bd660b
      由 NeilBrown 提交于 
      The ->quiesce method is not supposed to stop resync/recovery/reshape,
just normal IO.
But in raid5 we don't have a way to know which stripes are being
used for normal IO and which for resync etc, so we need to wait for
all stripes to be idle to be sure that all writes have completed.

However reshape keeps at least some stripe busy for an extended period
of time, so a call to raid5_quiesce can block for several seconds
needlessly.
So arrange for reshape etc to pause briefly while raid5_quiesce is
trying to quiesce the array so that the active_stripes count can
drop to zero.
Signed-off-by: NNeilBrown <neilb@suse.de>
      64bd660b
    • N
      md/raid5: set reshape_position correctly when reshape starts. · e516402c
      由 NeilBrown 提交于 
      As the internal reshape_progress counter is the main driver
for reshape, the fact that reshape_position sometimes starts with the
wrong value has minimal effect.  It is visible in sysfs and that
is all.
Signed-off-by: NNeilBrown <neilb@suse.de>
      e516402c
    • N
      md: Handle growth of v1.x metadata correctly. · 70471daf
      由 NeilBrown 提交于 
      The v1.x metadata does not have a fixed size and can grow
when devices are added.
If it grows enough to require an extra sector of storage,
we need to update the 'sb_size' to match.

Without this, md can write out an incomplete superblock with a
bad checksum, which will be rejected when trying to re-assemble
the array.

Cc: stable@kernel.org
Signed-off-by: NNeilBrown <neilb@suse.de>
      70471daf
    • N
      md: avoid array overflow with bad v1.x metadata · 3673f305
      由 NeilBrown 提交于 
      We trust the 'desc_nr' field in v1.x metadata enough to use it
as an index in an array.  This isn't really safe.
So range-check the value first.
Signed-off-by: NNeilBrown <neilb@suse.de>
      3673f305
    • N
      md: when a level change reduces the number of devices, remove the excess. · 3a981b03
      由 NeilBrown 提交于 
      When an array is changed from RAID6 to RAID5, fewer drives are
needed.  So any device that is made superfluous by the level
conversion must be marked as not-active.
For the RAID6->RAID5 conversion, this will be a drive which only
has 'Q' blocks on it.

Cc: stable@kernel.org
Signed-off-by: NNeilBrown <neilb@suse.de>
      3a981b03
    • A
      md: Push down data integrity code to personalities. · ac5e7113
      由 Andre Noll 提交于 
      This patch replaces md_integrity_check() by two new public functions:
md_integrity_register() and md_integrity_add_rdev() which are both
personality-independent.

md_integrity_register() is called from the ->run and ->hot_remove
methods of all personalities that support data integrity.  The
function iterates over the component devices of the array and
determines if all active devices are integrity capable and if their
profiles match. If this is the case, the common profile is registered
for the mddev via blk_integrity_register().

The second new function, md_integrity_add_rdev() is called from the
->hot_add_disk methods, i.e. whenever a new device is being added
to a raid array. If the new device does not support data integrity,
or has a profile different from the one already registered, data
integrity for the mddev is disabled.

For raid0 and linear, only the call to md_integrity_register() from
the ->run method is necessary.
Signed-off-by: NAndre Noll <maan@systemlinux.org>
Signed-off-by: NNeilBrown <neilb@suse.de>
      ac5e7113
  3. 31 7月, 2009 1 次提交
  5. 29 7月, 2009 1 次提交
  7. 28 7月, 2009 7 次提交
  9. 27 7月, 2009 9 次提交
  11. 25 7月, 2009 15 次提交