Groups > linux.kernel > #1202464

[PATCHv2 0/4] loop: enable different physical blocksizes

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From	Hannes Reinecke <hare@suse.de>
Newsgroups	linux.kernel
Subject	[PATCHv2 0/4] loop: enable different physical blocksizes
Date	Fri, 07 Aug 2015 11:00:02 +0200
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X-Original-Cc	Christoph Hellwig <hch@lst.de>, Alexander Graf <agraf@suse.com>, Ming Lei <tom.leiming@gmail.com>, linux-kernel@vger.kernel.org, Hannes Reinecke <hare@suse.de>
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Currently the loop driver just simulates 512-byte blocks. When
creating bootable images for virtual machines it might be required
to use a different physical blocksize (eg 4k for S/390 DASD), as
the some bootloaders (like lilo or zipl for S/390) need to know
the physical block addresses of the kernel and initrd.

This patchset extends the current LOOP_SET_STATUS64 ioctl to
set the logical and physical blocksize by re-using the existing
'init' fields, which are currently unused.

As usual, comments and reviews are welcome.

Changes to v1:
- Move LO_FLAGS_BLOCKSIZE definition
- Reshuffle patches

Hannes Reinecke (4):
  loop: Remove unused 'bdev' argument from loop_set_capacity
  loop: Enable correct physical blocksize
  loop: Add 'lo_logical_blocksize'
  loop: Pass logical blocksize in 'lo_init[0]' ioctl field

 drivers/block/loop.c      | 35 ++++++++++++++++++++++++++++++-----
 drivers/block/loop.h      |  1 +
 include/uapi/linux/loop.h |  1 +
 3 files changed, 32 insertions(+), 5 deletions(-)

-- 
1.8.4.5

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[PATCHv2 0/4] loop: enable different physical blocksizes Hannes Reinecke <hare@suse.de> - 2015-08-07 11:00 +0200
  [PATCH 2/4] loop: Enable correct physical blocksize Hannes Reinecke <hare@suse.de> - 2015-08-07 11:00 +0200
    Re: [PATCH 2/4] loop: Enable correct physical blocksize Ming Lei <tom.leiming@gmail.com> - 2015-08-10 10:00 +0200
  [PATCH 4/4] loop: Pass logical blocksize in 'lo_init[0]' ioctl field Hannes Reinecke <hare@suse.de> - 2015-08-07 11:00 +0200

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