Fix native linux device [main]

[badrishc]

The t64 ABI transition renamed libaio.so.1 to libaio.so.1t64, breaking libnative_device.so which has a hard DT_NEEDED of libaio.so.1. Previously we worked around this with system-wide symlinks in every Dockerfile and CI workflow.

Fix this properly in the loader itself:

• CMakeLists.txt now sets RPATH=$ORIGIN (via INSTALL_RPATH + BUILD_WITH_INSTALL_RPATH + --disable-new-dtags) so libnative_device.so searches its own directory for dependencies. This lets a managed-side compat symlink next to the native library satisfy the linker without any LD_LIBRARY_PATH contortions from the caller.

• libaio_compat.h (new) pins the libaio entry points to the specific symbol versions that make libaio's userspace fast paths kick in:
  io_setup @LIBAIO_0.4
  io_destroy @LIBAIO_0.4
  io_getevents@LIBAIO_0.4 (userspace ring fast path)
  io_submit @LIBAIO_0.1
  Older libaio-dev marked LIBAIO_0.4 as the default version so a plain
  link picked these up automatically. On t64 (libaio1t64-dev) the default
  is gone and libaio.h has no .symver redirects for x86_64, so a fresh
  link produces UNVERSIONED references that at runtime resolve to the
  slower LIBAIO_0.1 io_getevents which always syscalls and blocks -
  which caused NativeStorageDevice probe/TryComplete paths to hang.

• NativeStorageDevice.ImportResolver now resolves NativeLibraryPath to an absolute path (fixing a latent bug where the relative path bypassed .NET's runtimes/ probing) and, on Linux, catches DllNotFoundException referencing libaio.so.1, locates libaio.so.1t64 in standard multiarch paths, and drops a compat symlink next to libnative_device.so. The symlink creation tolerates the race where multiple processes start simultaneously and another process has already created a usable symlink. If repair still fails, the loader throws a descriptive DllNotFoundException explaining the t64 transition and offering three remediation options.

• VectorManager.Initialize() and ResumePostRecovery() now early-return when IsEnabled is false. Vector Set preview is off by default; there is no reason these paths should touch storage when the feature is disabled.

With the loader + build fixes in place, remove the now-redundant workarounds:

• Dockerfile and Dockerfile.ubuntu: drop the ln -sf libaio.so.1 line. (Dockerfile.alpine and Dockerfile.azurelinux ship libaio.so.1 natively. Dockerfile.chiseled uses a restricted runtime and was not touched.)

• .github/workflows/ci.yml and nightly.yml: drop the ubuntu-latest libaio pre-step; the managed ImportResolver now handles repair automatically and the test suite actually exercises the repair path.

• validate_docker_images.py: accept either libaio.so.1 or libaio.so.1t64, since the former is only materialized lazily (on first native device init) for glibc images now.

The bundled libnative_device.so has been rebuilt against the above sources with '-O3 -g -DNDEBUG' (project Release defaults). Verified via objdump -T that io_* references are correctly versioned.

[Copilot]

Pull request overview

This PR addresses Linux native device breakage caused by the Debian/Ubuntu t64 transition renaming libaio.so.1 → libaio.so.1t64, by making the native-device loader self-heal at runtime and by updating build/test infrastructure to remove now-redundant symlink workarounds.

Changes:

• Update NativeStorageDevice’s DllImport resolver to load the native library via an absolute path and (on Linux) auto-repair missing libaio.so.1 by creating a local compat symlink to libaio.so.1t64, with improved diagnostics.
• Add a C++ libaio symbol-version pinning header and set RPATH=$ORIGIN on libnative_device.so to allow colocated dependency resolution.
• Remove Docker/CI symlink workaround steps and relax Docker image validation to accept either libaio.so.1 or libaio.so.1t64.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/docker-tests/validate_docker_images.py	Accept either libaio SONAME in image validation.
libs/storage/Tsavorite/cs/src/core/Device/NativeStorageDevice.cs	Absolute-path native load + libaio t64 auto-repair + diagnostics.
libs/storage/Tsavorite/cc/src/device/libaio_compat.h	New header to force specific versioned libaio symbols at link time.
libs/storage/Tsavorite/cc/src/device/file_linux.h	Include the new libaio compatibility header.
libs/storage/Tsavorite/cc/src/CMakeLists.txt	Add $ORIGIN RPATH and disable new dtags (DT_RPATH behavior).
libs/server/Resp/Vector/VectorManager.cs	No-op initialization/recovery when vector feature disabled.
Dockerfile	Remove build-time global libaio symlink workaround.
Dockerfile.ubuntu	Remove build-time global libaio symlink workaround.
.github/workflows/ci.yml	Remove Ubuntu libaio workaround step.
.github/workflows/nightly.yml	Remove Ubuntu libaio workaround step.

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