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Re: [Qemu-devel] Question about block driver
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] Question about block driver |
Date: |
Thu, 30 Apr 2015 11:33:26 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
[Cc: qemu-block]
Am 30.04.2015 um 11:11 hat Wen Congyang geschrieben:
> Some drivers use bdrv_open, while the other dirvers use bdrv_file_open().
> What is the difference between bdrv_open() and bdrv_file_open()?
bdrv_file_open() is used by protocol drivers that don't need any other
driver to work (e.g. raw-posix), bdrv_open() is used by format drivers
that need a bs->file (e.g. raw or qcow2).
They used to have different parameters originally, but nowadays that's
the only difference.
Kevin