md: superblock changes for PPL

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Include information about PPL location and size into mdp_superblock_1
and copy it to/from rdev. Because PPL is mutually exclusive with bitmap,
put it in place of 'bitmap_offset'. Add a new flag MD_FEATURE_PPL for
'feature_map', analogically to MD_FEATURE_BITMAP_OFFSET. Add MD_HAS_PPL
to mddev->flags to indicate that PPL is enabled on an array.

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>

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Artur Paszkiewicz 2017-03-09 09:59:57 +01:00 • committed by Shaohua Li

parent effe6ee752

commit ea0213e0c7

5 changed files with 45 additions and 6 deletions

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18

include/uapi/linux/raid/md_p.h

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