* changes:
  fd_server: use RwLock instead of Mutex
  authfs: use RwLock instead of Mutex
  Only read backing file if chunk index is in range

`nix::dir::Dir` isn't Sync (required by `RwLock`), so I had to replace
it with `OwnedFd`.

Bug: 220386264
Test: atest AuthFsHostTest
Test: performance change before vs after is hard to tell
Change-Id: Ib3fd9047970a856b532234f0bebad652172e12de

Bug: 220386264
Test: Observed faster parallel file reads (at least not much slower,
      possibly due to lock contention), with prototype of multithread
      support.
Change-Id: I3126932f9b3c769756ec1123e4746d3d1de88a1e

If the chunk index is out of range (which can be a valid read request),
simply return 0. Previously, we had to deal with fd_server when it
returned an unexpected result. Now we don't need to handle it (the
inconsistant state may still be on Android, but we don't care here).

Bug: 221847239
Test: atest AuthFsHostTest
Change-Id: I3450f496de58f2933fb3818b42e9510c56875061

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2008219

Change-Id: Ia94cbe02a133fbbfb0ecbb5a51759fc3568b5f0b

* changes:
  Fix test action that tampered file at wrong offset
  Verify the last incomplete chunk on resize
  Verify read_chunk for writable file

The implementation in writeZerosAtFileOffsetOnMicrodroid specifies the
offset of the output file by "skip" of "dd". But actually, "skip" is for
"if=", while "seek" is for "of=". The test expectation did not fail
coincidentally.

Bug: N/A
Test: testWriteFailedIfDetectsTampering
Change-Id: I89c9c96d250f4374e51a01c986aa1289b24ac236

Bug: 221847239
Test: AuthFsHostTest
Change-Id: I9c7b68d51faac3e34053d6fbf5d3eeb9f702c7e8

A new test case is added. Besides, fix a side effect in
testWriteThroughCorrectly that truncates the backing by mistake (though
doesn't affect the purpose of the case).

Bug: 221847239
Test: atest AuthFsHostTest
Change-Id: I6b3f2b0c964c42b6bace94ff04b4f5edbc2d9efd

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2010756

Change-Id: I71f28092ffff46b1d84a4f1d8bfe74f117a48ac2

Check the properties instead (capability not implementation).

Bug: 218276733
Test: atest VirtualizationTestCases.64
Change-Id: Ifa5d463effb09b30d0166c0bfde13da86978d90c

We should use the system properties instead (check for capability not
implementation). And we should use the new utilities to do so.

Bug: 218276733
Test: m ComposHostTestCases AuthFsHostTest MicrodroidHostTestCases
Test: atest ComposHostTestCases
Change-Id: I5db819dd874487310a40cb6736f873d3b6273ecd

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1997007

Change-Id: I71ee955ec8531a2611114393b9ed70d0a3ae0fa0

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2005291

Change-Id: I2aab9593755758f51655c31dbb31d4af5da4058c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1998181

Change-Id: I6fcbfb0454ec051cafdbad0b442e31b037161185

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2000670

Change-Id: I5f100c5d3a3f8cca9b58eebbf2f480b6855cacf1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1998180

Change-Id: Ibd7761dee7992637619b8d06083f435fe85fbb21

Bug: 218461230
Test: atest MicrodroidTests
Change-Id: Iccf97c822f1043f866b49f9c7e258a8cac1a3f32

u-boot uses instance disk only when protected VM.

Bug: 218461230
Test: atest MicrodroidTests
Change-Id: I66956f3b4a5c6bf6d134662d4ede652f46e2dcc3

This removes schema-mapped Java classes which are duplication with
Rust's mapping type.

Bug: 221368644
Test: atest MicdrodroidHostTestCases
Change-Id: I8d2fe9ac21a887543adb05298ddaaae0b413d490

For better readability.

Bug: 218461230
Test: atest MicrodroidTests
Change-Id: I80116b978f520092dc1f6e1c9ecbe889fd62d569

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2000464

Change-Id: Iaa01484beb1ad3730471aaf7a0026b0b783e6806

Add DeathReason variants for various verification failure possibilities.

Bug: 220071963
Change-Id: I2b014fcd48fa571d9e2089fde09f8199955a9e7f

bug: 215232614
Test: TreeHugger and compiling with m rust
Change-Id: I8d2d37657a3b1b2afdc1f1594d1065ead0b2548f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2002292

Change-Id: Iaf8e6fd1cba4daa481e98406ea9f02c829410d6f

pvmfw.img

Built here: ab/8231605


The change is generated with prebuilt drop tool.

Bug: 217161634
Test: boot a VM
Change-Id: I31c7ce92c01fc7afae86a9b3b39bda7aead147fd

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1999391

Change-Id: Id86f877f0fcb04d5f7f041b63144ff0644e24376

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2000671

Change-Id: I87b05956e27aa68c31ef68c246252a5485ac869f

We've found signing can be run where truncate is not available.
Error:

  No such file or directory: 'truncate'

Use python's truncate() instead.

Bug: 193504286
Test: atest sign_virt_apex_test
Change-Id: I9c8a78ba381274b406ba509f5f3f7ddd049bd60f

We run VS at early boot (via compos_verify), and we want to see its
logs in case something interesting happens. That seems to require
using the sytem log.

Bug: 215419883
Test: Run staged-apex-compile, reboot, see logs
Change-Id: I24c55196b5403df3057c690691f0f585c4a8f2fc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1976386

Change-Id: I0934e1d86fa20e9448281ca12bfa0c0357f4e3a7

VM config can now specify the requirement on the virtual platform
version. At runtime, the requirement is matched against the actual
virtual platform version that crosvm implements. If they don't match,
the VM can't be created. The version format follows SemVer, allowing us
to express backwards compatible and incompatible changes in the future.

Bug: 193504487
Test: atest VirtualizationTestCases
Change-Id: I23d370081e10399502178b9cfe8a46b05addf186

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1999390

Change-Id: I4e67526cefeebc69e9857046edc375c745fc934f