virtio_blk: add block topology support

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Allow reading various alignment values from the config page.  This
allows the guest to much better align I/O requests depending on the
storage topology.

Note that the formats for the config values appear a bit messed up,
but we follow the formats used by ATA and SCSI so they are expected in
the storage world.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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Christoph Hellwig 2010-02-24 14:22:25 -06:00 • committed by Rusty Russell

parent d57ed95da4

commit 69740c8ba8

2 changed files with 59 additions and 15 deletions

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drivers/block/virtio_blk.c

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