Feat: Add Ino, Eventfd and Signalfd to fdinfo

[rahulk789]

Description

Adds Ino, Event fd and Signalfd fields to /proc fdinfo.
Includes conclusive go and syscall tests for the added fdinfo fields. The tests pass as expected.

make test TARGETS="//pkg/sentry/fsimpl/proc:proc_test //pkg/sentry/fsimpl/eventfd:eventfd_test //pkg/sentry/fsimpl/proc:proc_nogo //pkg/sentry/fsimpl/eventfd:eventfd_nogo" OPTIONS="--test_output=errors"

Output:

--- TAG default
--- DOCKER BUILD
gvisor-builder-e313a4e7-x86_64
sha256:2eccf172fd274164a13de09a38f80bc4161335597f3cf4ae9dd92f3701c4d6e6

Waiting for it to complete...
Another command (pid=388084) is running. Waiting for it to complete on the server (server_pid=388087)...
Computing main repo mapping: 
WARNING: For repository 'bazel_skylib', the root module requires module version bazel_skylib@1.7.1, but got bazel_skylib@1.8.2 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
Loading: 
Loading: 2 packages loaded
Analyzing: 4 targets (653 packages loaded, 42144 targets configured)
Analyzing: 4 targets (653 packages loaded, 50999 targets configured)
[1 / 1] no actions running
INFO: Analyzed 4 targets (653 packages loaded, 51131 targets configured).
[604 / 2,234] checking cached actions
[3,136 / 4,820] checking cached actions
[5,278 / 5,364] 1 / 4 tests; checking cached actions
INFO: Found 4 test targets...
INFO: Elapsed time: 13.044s, Critical Path: 1.27s
INFO: 1 process: 5375 action cache hit, 1 internal.
//pkg/sentry/fsimpl/eventfd:eventfd_nogo                        (cached) PASSED in 0.1s
//pkg/sentry/fsimpl/eventfd:eventfd_test                        (cached) PASSED in 0.0s
//pkg/sentry/fsimpl/proc:proc_nogo                              (cached) PASSED in 0.1s
//pkg/sentry/fsimpl/proc:proc_test                              (cached) PASSED in 0.8s
Executed 0 out of 4 tests: 4 tests pass.
There were tests whose specified size is too big. Use the --test_verbose_timeout_warnings command line option to see which ones these are.
INFO: Build completed successfully, 1 total action
INFO: 
INFO: Build Event Protocol files produced successfully.

Syscall Tests:

make syscall-tests TARGETS="//test/syscalls:proc_test_runsc_systrap_directfs" OPTIONS="--test_filter=ProcSelfFdInfo.*"

Output:

--- TAG default
--- DOCKER BUILD
gvisor-builder-e313a4e7-x86_64
sha256:3acd50a232a30b37efa64680a0f527caa345a0eb27e4a12dd15364a59ada445d
--- COPY //:release /tmp/master

Computing main repo mapping: 
WARNING: For repository 'bazel_skylib', the root module requires module version bazel_skylib@1.7.1, but got bazel_skylib@1.8.2 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
Loading: 
Loading: 2 packages loaded
Analyzing: target //:release (3 packages loaded, 0 targets configured)
Analyzing: target //:release (3 packages loaded, 0 targets configured)

WARNING: /gvisor/runsc/prewarmer/BUILD:19:8: target 'gvisor-sentry-prewarmer' is both a rule and a file; please choose another name for the rule
Analyzing: target //:release (98 packages loaded, 2712 targets configured)

Analyzing: target //:release (162 packages loaded, 8708 targets configured)

Analyzing: target //:release (786 packages loaded, 13733 targets configured)

Analyzing: target //:release (1214 packages loaded, 36482 targets configured)

Analyzing: target //:release (1281 packages loaded, 54359 targets configured)

INFO: Analyzed target //:release (1284 packages loaded, 57789 targets configured).
[1,079 / 3,756] checking cached actions
[3,745 / 3,756] [Prepa] GoLink shim/containerd-shim-runsc-v1_/containerd-shim-runsc-v1
[3,749 / 3,756] [Prepa] Executing genrule //runsc/checkpointgofer:checkpointgofer_noflate
[3,754 / 3,756] GoLink runsc/runsc_/runsc; 0s linux-sandbox
INFO: Found 1 target...
Target //:release up-to-date:
  bazel-bin/release/runsc
  bazel-bin/release/containerd-shim-runsc-v1
  bazel-bin/release/gvisor-bin/checkpointgofer
  bazel-bin/release/gvisor-bin/runsc-metric-server
  bazel-bin/release/gvisor-bin/gvisor_sentry
  bazel-bin/release/gvisor-bin/gvisor-sentry-prewarmer
[3,756 / 3,756] no actions running
INFO: Elapsed time: 14.235s, Critical Path: 4.12s
INFO: 9 processes: 3754 action cache hit, 1 internal, 8 linux-sandbox.
INFO: Build completed successfully, 9 total actions
Computing main repo mapping: 
Loading: 
Loading: 0 packages loaded
Analyzing: target //:release (0 packages loaded, 0 targets configured)
INFO: Analyzed target //:release (0 packages loaded, 0 targets configured).
INFO: Found 1 target...
INFO: Elapsed time: 0.293s, Critical Path: 0.00s
INFO: 0 processes.
INFO: Build completed successfully, 0 total actions
--- TEST --test_filter=ProcSelfFdInfo.* --test_env=RUNTIME=/tmp/master/runsc --test_env=GVISOR_SIDECAR_BINARIES_DIR=/tmp/master/gvisor-bin --cxxopt=-Werror --test_env=PARTITION=1 --test_env=TOTAL_PARTITIONS=1 -- //test/syscalls:proc_test_runsc_systrap_directfs
Computing main repo mapping: 
Loading: 
Loading: 0 packages loaded
WARNING: Build options --cxxopt, --strip, and --test_env have changed, discarding analysis cache (this can be expensive, see https://bazel.build/advanced/performance/iteration-speed).
Analyzing: target //test/syscalls:proc_test_runsc_systrap_directfs (1 packages loaded, 0 targets configured)
Analyzing: target //test/syscalls:proc_test_runsc_systrap_directfs (1 packages loaded, 0 targets configured)

Analyzing: target //test/syscalls:proc_test_runsc_systrap_directfs (42 packages loaded, 43666 targets configured)

INFO: Analyzed target //test/syscalls:proc_test_runsc_systrap_directfs (42 packages loaded, 58342 targets configured).
[1 / 1] no actions running
[4,027 / 4,040] [Prepa] GoLink shim/containerd-shim-runsc-v1_/containerd-shim-runsc-v1
[4,032 / 4,040] GoLink runsc/checkpointgofer/checkpointgofer_binary_/checkpointgofer_binary; 1s linux-sandbox
[4,038 / 4,040] GoLink runsc/runsc_/runsc; 1s linux-sandbox
INFO: Found 1 test target...
Target //test/syscalls:proc_test_runsc_systrap_directfs up-to-date:
  bazel-bin/test/syscalls/proc_test_runsc_systrap_directfs
INFO: Elapsed time: 10.145s, Critical Path: 4.83s
INFO: 9 processes: 4047 action cache hit, 1 internal, 8 linux-sandbox.
INFO: Build completed successfully, 9 total actions
INFO: 
//test/syscalls:proc_test_runsc_systrap_directfs                (cached) PASSED in 0.2s
  Stats over 8 runs: max = 0.2s, min = 0.1s, avg = 0.2s, dev = 0.1s

Executed 0 out of 1 test: 1 test passes.
There were tests whose specified size is too big. Use the --test_verbose_timeout_warnings command line option to see which ones these are.
INFO: Build Event Protocol files produced successfully.

[google-cla]

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[rahulk789]

@fvoznika @rexren-gif Bumping!