qemu-io: add -r option to register I/O buffer

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The blk_register_buf() API is an optimization hint that allows some
block drivers to avoid I/O buffer housekeeping or bounce buffers.

Add an -r option to register the I/O buffer so that qemu-io can be used
to test the blk_register_buf() API. The next commit will add a test that
uses the new option.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230207203719.242926-4-stefanha@redhat.com>

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This commit is contained in:

Stefan Hajnoczi

2023-02-09 10:22:30 -05:00

parent 1321e00801

commit 00e2a04c27

1 changed files with 130 additions and 76 deletions

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qemu-io-cmds.c

+130 -76

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