xen/blkfront: separate per ring information out of device info

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Split per ring information to a new structure "blkfront_ring_info".

A ring is the representation of a hardware queue, every vbd device can associate
with one or more rings depending on how many hardware queues/rings to be used.

This patch is a preparation for supporting real multi hardware queues/rings.

We also add a backpointer to 'struct blkfront_info' (dev_info) which
is not needed (we could use containers_of) but further patch
("xen/blkfront: pseudo support for multi hardware queues/rings")
will make allocation of 'blkfront_ring_info' dynamic.

Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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This commit is contained in:

Bob Liu

2015-11-14 11:12:11 +08:00

committed by Konrad Rzeszutek Wilk

parent eb5df87fab

commit 81f3516157

1 changed files with 196 additions and 161 deletions

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drivers/block/xen-blkfront.c

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