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| author | Jamie Liu <jamieliu@google.com> | 2021-02-02 13:59:42 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-02-02 14:01:22 -0800 |
| commit | ff8b308a30f46993f31f398c6e8d5b3bad03d865 (patch) | |
| tree | 2fa14c7fa4857f3057d0a11445095c3a3ad87c44 /pkg/sentry | |
| parent | fcc2468db573fec37c91236f805f7fa0e46e4492 (diff) | |
Remove call to Notify from pipe.VFSPipeFD.CopyOutFrom.
This was missed in cl/351911375; pipe.VFSPipeFD.SpliceFromNonPipe already calls
Notify.
PiperOrigin-RevId: 355246655
Diffstat (limited to 'pkg/sentry')
| -rw-r--r-- | pkg/sentry/kernel/pipe/vfs.go | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/pkg/sentry/kernel/pipe/vfs.go b/pkg/sentry/kernel/pipe/vfs.go index 3b6336e94..09c0ccaf2 100644 --- a/pkg/sentry/kernel/pipe/vfs.go +++ b/pkg/sentry/kernel/pipe/vfs.go @@ -368,17 +368,15 @@ func (fd *VFSPipeFD) CopyInTo(ctx context.Context, ars usermem.AddrRangeSeq, dst }) } -// CopyOutFrom implements usermem.IO.CopyOutFrom. +// CopyOutFrom implements usermem.IO.CopyOutFrom. Note that it is the caller's +// responsibility to call fd.pipe.Notify(waiter.EventIn) after the write is +// completed. // // Preconditions: fd.pipe.mu must be locked. func (fd *VFSPipeFD) CopyOutFrom(ctx context.Context, ars usermem.AddrRangeSeq, src safemem.Reader, opts usermem.IOOpts) (int64, error) { - n, err := fd.pipe.writeLocked(ars.NumBytes(), func(dsts safemem.BlockSeq) (uint64, error) { + return fd.pipe.writeLocked(ars.NumBytes(), func(dsts safemem.BlockSeq) (uint64, error) { return src.ReadToBlocks(dsts) }) - if n > 0 { - fd.pipe.Notify(waiter.EventIn) - } - return n, err } // SwapUint32 implements usermem.IO.SwapUint32. |