From 57877b420caa02bf4c60004c7b434ceef8603b26 Mon Sep 17 00:00:00 2001 From: Ayush Ranjan Date: Thu, 27 Aug 2020 16:28:36 -0700 Subject: [go-marshal] Support for usermem.IOOpts. PiperOrigin-RevId: 328839759 --- pkg/sentry/kernel/task_usermem.go | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'pkg/sentry/kernel') diff --git a/pkg/sentry/kernel/task_usermem.go b/pkg/sentry/kernel/task_usermem.go index 4550b9f89..0cb86e390 100644 --- a/pkg/sentry/kernel/task_usermem.go +++ b/pkg/sentry/kernel/task_usermem.go @@ -301,3 +301,30 @@ func (t *Task) IovecsIOSequence(addr usermem.Addr, iovcnt int, opts usermem.IOOp Opts: opts, }, nil } + +// CopyContextWithOpts wraps a task to allow copying memory to and from the +// task memory with user specified usermem.IOOpts. +type CopyContextWithOpts struct { + *Task + opts usermem.IOOpts +} + +// AsCopyContextWithOpts wraps the task and returns it as CopyContextWithOpts. +func (t *Task) AsCopyContextWithOpts(opts usermem.IOOpts) *CopyContextWithOpts { + return &CopyContextWithOpts{t, opts} +} + +// CopyInString copies a string in from the task's memory. +func (t *CopyContextWithOpts) CopyInString(addr usermem.Addr, maxLen int) (string, error) { + return usermem.CopyStringIn(t, t.MemoryManager(), addr, maxLen, t.opts) +} + +// CopyInBytes copies task memory into dst from an IO context. +func (t *CopyContextWithOpts) CopyInBytes(addr usermem.Addr, dst []byte) (int, error) { + return t.MemoryManager().CopyIn(t, addr, dst, t.opts) +} + +// CopyOutBytes copies src into task memoryfrom an IO context. +func (t *CopyContextWithOpts) CopyOutBytes(addr usermem.Addr, src []byte) (int, error) { + return t.MemoryManager().CopyOut(t, addr, src, t.opts) +} -- cgit v1.2.3