From a78cef0ed7ce15583424f5873f0aa6fdad1d5c2f Mon Sep 17 00:00:00 2001
From: Jing Chen <chjing@google.com>
Date: Thu, 3 Dec 2020 19:55:20 -0800
Subject: Implement command IPC_INFO for semctl.
PiperOrigin-RevId: 345589628
---
pkg/sentry/kernel/semaphore/semaphore.go | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
(limited to 'pkg/sentry/kernel')
diff --git a/pkg/sentry/kernel/semaphore/semaphore.go b/pkg/sentry/kernel/semaphore/semaphore.go
index 335be8edd..31198d772 100644
--- a/pkg/sentry/kernel/semaphore/semaphore.go
+++ b/pkg/sentry/kernel/semaphore/semaphore.go
@@ -176,6 +176,22 @@ func (r *Registry) FindOrCreate(ctx context.Context, key, nsems int32, mode linu
return r.newSet(ctx, key, owner, owner, perms, nsems)
}
+// IPCInfo returns information about system-wide semaphore limits and parameters.
+func (r *Registry) IPCInfo() *linux.SemInfo {
+ return &linux.SemInfo{
+ SemMap: linux.SEMMAP,
+ SemMni: linux.SEMMNI,
+ SemMns: linux.SEMMNS,
+ SemMnu: linux.SEMMNU,
+ SemMsl: linux.SEMMSL,
+ SemOpm: linux.SEMOPM,
+ SemUme: linux.SEMUME,
+ SemUsz: 0, // SemUsz not supported.
+ SemVmx: linux.SEMVMX,
+ SemAem: linux.SEMAEM,
+ }
+}
+
// RemoveID removes set with give 'id' from the registry and marks the set as
// dead. All waiters will be awakened and fail.
func (r *Registry) RemoveID(id int32, creds *auth.Credentials) error {
--
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