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d33b154dd7
Add two interfaces for fs storage driver for supporting global writing and reading, which is used by ACRN. Signed-off-by: Wei Zhang <weizhang555@gmail.com>
29 lines
1.2 KiB
Go
29 lines
1.2 KiB
Go
// Copyright (c) 2019 Huawei Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package persistapi
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// PersistDriver is interface describing operations to save/restore persist data
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type PersistDriver interface {
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// ToDisk flushes data to disk(or other storage media such as a remote db)
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ToDisk(SandboxState, map[string]ContainerState) error
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// FromDisk will restore all data for sandbox with `sid` from storage.
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// We only support get data for one whole sandbox
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FromDisk(sid string) (SandboxState, map[string]ContainerState, error)
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// Destroy will remove everything from storage
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Destroy(sid string) error
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// Lock locks the persist driver, "exclusive" decides whether the lock is exclusive or shared.
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// It returns Unlock Function and errors
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Lock(sid string, exclusive bool) (func() error, error)
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// GlobalWrite writes "data" to "StorageRootPath"/"relativePath";
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// GlobalRead reads "data" from "StorageRootPath"/"relativePath";
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// these functions are used for writing/reading some global data,
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// they are specially designed for ACRN so far.
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// Don't use them too much unless you have no other choice! @weizhang555
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GlobalWrite(relativePath string, data []byte) error
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GlobalRead(relativePath string) ([]byte, error)
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}
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