commit ae8bf312e97d554b6aa32e7b2ceb993812ad0835
author Lars Ellenberg <lars.ellenberg@linbit.com> Tue Mar 19 18:16:43 2013 +0100
committer Jens Axboe <axboe@kernel.dk> Fri Mar 22 18:13:59 2013 -0600
tree 7ed6d4fcf6385c1dbc694cf4f43f884436ae104a
parent 9114d79569a3fb858a7ecb1f21cb1dec93dc2f21

drbd: cleanup ondisk meta data layout calculations and defines

Add a comment about our meta data layout variants,
and rename a few defines (e.g. MD_RESERVED_SECT -> MD_128MB_SECT)
to make it clear that they are short hand for fixed constants,
and not arbitrarily to be redefined as one may see fit.

Properly pad struct meta_data_on_disk to 4kB,
and initialize to zero not only the first 512 Byte,
but all of it in drbd_md_sync().

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>