diff options
Diffstat (limited to 'pkg/sentry/kernel/semaphore')
| -rw-r--r-- | pkg/sentry/kernel/semaphore/semaphore.go | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/pkg/sentry/kernel/semaphore/semaphore.go b/pkg/sentry/kernel/semaphore/semaphore.go index 3dd3953b3..db01e4a97 100644 --- a/pkg/sentry/kernel/semaphore/semaphore.go +++ b/pkg/sentry/kernel/semaphore/semaphore.go @@ -193,12 +193,26 @@ func (r *Registry) IPCInfo() *linux.SemInfo { SemMsl: linux.SEMMSL, SemOpm: linux.SEMOPM, SemUme: linux.SEMUME, - SemUsz: 0, // SemUsz not supported. + SemUsz: linux.SEMUSZ, SemVmx: linux.SEMVMX, SemAem: linux.SEMAEM, } } +// SemInfo returns a seminfo structure containing the same information as +// for IPC_INFO, except that SemUsz field returns the number of existing +// semaphore sets, and SemAem field returns the number of existing semaphores. +func (r *Registry) SemInfo() *linux.SemInfo { + r.mu.Lock() + defer r.mu.Unlock() + + info := r.IPCInfo() + info.SemUsz = uint32(len(r.semaphores)) + info.SemAem = uint32(r.totalSems()) + + return info +} + // HighestIndex returns the index of the highest used entry in // the kernel's array. func (r *Registry) HighestIndex() int32 { @@ -289,6 +303,18 @@ func (r *Registry) FindByID(id int32) *Set { return r.semaphores[id] } +// FindByIndex looks up a set given an index. +func (r *Registry) FindByIndex(index int32) *Set { + r.mu.Lock() + defer r.mu.Unlock() + + id, present := r.indexes[index] + if !present { + return nil + } + return r.semaphores[id] +} + func (r *Registry) findByKey(key int32) *Set { for _, v := range r.semaphores { if v.key == key { |