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block: abstractions for request parsing and execution #29

Merged
merged 5 commits into from
Dec 9, 2020
Merged

block: abstractions for request parsing and execution #29

merged 5 commits into from
Dec 9, 2020

Commits on Dec 9, 2020

  1. block: add Request abstraction 

    Added the Request abstraction that handles the virtio
block device request parsing via `parse()` method and
keeps the necessary information for the request execution.
Also added a mention in README about the supported virtio
versions.
vm-memory dependency is now pointing to 0.4.0 since 0.3.0
no longer compiles because of the v1.0.0 arc-swap update.

Signed-off-by: Laura Loghin <[email protected]>
    @lauralt
    lauralt committed Dec 9, 2020
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  2. add build_desc_chain helper function 

    Signed-off-by: Alexandru Agache <[email protected]>
    @alexandruag @lauralt
    alexandruag authored and lauralt committed Dec 9, 2020
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  3. add tests for request parsing 

    Signed-off-by: Laura Loghin <[email protected]>
    @lauralt
    lauralt committed Dec 9, 2020
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  4. block: add StdIoBackend abstraction 

    This commit proposes a separate abstraction for block device
request execution. The reason behind this is the fact that
there can be multiple ways to execute these requests,
e.g. asynchronous dispatch of requests and result collection.
Such complex executors can be implemented as separate components
which coexist with the current proposal.

Signed-off-by: Laura Loghin <[email protected]>
Suggested-by: Alexandru Agache <[email protected]>
    @lauralt
    lauralt committed Dec 9, 2020
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  5. hide StdIoBackend behind backend-stdio feature 

    Signed-off-by: Laura Loghin <[email protected]>
    @lauralt
    lauralt committed Dec 9, 2020
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