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vm-migration: Add versioned versions of snapshot & state API

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This will allow progressive porting of parts of the VMM to using
versioned state. A new trait VersionMapped is introduced with a default
implementation that returns an empty VersionMap to ease implementation.

If a struct is updated the the trait will need to be fully implemented
with VersionMapped::version_map() returning a new VersionMap handling
the change.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2021-05-05 15:16:19 +00:00
parent 2eeeaf5753
commit bbda08717f
3 changed files with 112 additions and 0 deletions
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Cargo.lock generated
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@@ -108,6 +108,15 @@ dependencies = [
"rustc-demangle",
]
[[package]]
name = "bincode"
version = "1.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
dependencies = [
"serde",
]
[[package]]
name = "bitflags"
version = "0.5.0"
@@ -215,6 +224,12 @@ dependencies = [
"bitflags 1.2.1",
]
[[package]]
name = "crc64"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "55626594feae15d266d52440b26ff77de0e22230cf0c113abe619084c1ddc910"
[[package]]
name = "credibility"
version = "0.1.3"
@@ -1128,6 +1143,34 @@ version = "0.8.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
[[package]]
name = "versionize"
version = "0.1.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7429cf68de8f091b667d27323ed323afd39584a56d533995b12ddd748e5e6ca9"
dependencies = [
"bincode",
"crc64",
"proc-macro2",
"quote",
"serde",
"serde_derive",
"syn",
"versionize_derive",
"vmm-sys-util",
]
[[package]]
name = "versionize_derive"
version = "0.1.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "140aa9fd298f667ea50fa1cb0d8530076924079285c623b18b8f8a1c28386b4a"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "vfio-bindings"
version = "0.2.0"
@@ -1295,6 +1338,8 @@ dependencies = [
"serde_derive",
"serde_json",
"thiserror",
"versionize",
"versionize_derive",
"vm-memory",
]