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| author | Philipp Reisner | 2013-06-25 16:50:08 +0200 |
|---|---|---|
| committer | Jens Axboe | 2013-06-28 16:04:36 +0200 |
| commit | d752b2696072ed52fd5afab08b601e2220a3b87e (patch) | |
| tree | a6a88c4af1c6e82575d58a68651f0156431d5c09 /drivers/block/drbd/drbd_receiver.c | |
| parent | drbd: Constants should be UPPERCASE (diff) | |
| download | kernel-qcow2-linux-d752b2696072ed52fd5afab08b601e2220a3b87e.tar.gz kernel-qcow2-linux-d752b2696072ed52fd5afab08b601e2220a3b87e.tar.xz kernel-qcow2-linux-d752b2696072ed52fd5afab08b601e2220a3b87e.zip | |
drbd: Allow online change of al-stripes and al-stripe-size
Allow to change the AL layout with an resize operation. For that
the reisze command gets two new fields: al_stripes and al_stripe_size.
In order to make the operation crash save:
1) Lock out all IO and MD-IO
2) Write the super block with MDF_PRIMARY_IND clear
3) write the bitmap to the new location (all zeros, since
we allow only while connected)
4) Initialize the new AL-area
5) Write the super block with the restored MDF_PRIMARY_IND.
6) Unfreeze all IO
Since the AL-layout has no influence on the protocol, this operation
needs to be beforemed on both sides of a resource (if intended).
Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/drbd/drbd_receiver.c')
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 26852b87b034..cc29cd3bf78b 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3617,7 +3617,7 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi) ddsf = be16_to_cpu(p->dds_flags); if (get_ldev(mdev)) { - dd = drbd_determine_dev_size(mdev, ddsf); + dd = drbd_determine_dev_size(mdev, ddsf, NULL); put_ldev(mdev); if (dd == DS_ERROR) return -EIO; |