diff options
Diffstat (limited to 'pkg/sentry/socket/unix/unix.go')
| -rw-r--r-- | pkg/sentry/socket/unix/unix.go | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/pkg/sentry/socket/unix/unix.go b/pkg/sentry/socket/unix/unix.go index 1c22e78b3..e30378e60 100644 --- a/pkg/sentry/socket/unix/unix.go +++ b/pkg/sentry/socket/unix/unix.go @@ -378,7 +378,8 @@ func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to [] w.To = ep } - if n, err := src.CopyInTo(t, &w); err != syserror.ErrWouldBlock || flags&linux.MSG_DONTWAIT != 0 { + n, err := src.CopyInTo(t, &w) + if err != syserror.ErrWouldBlock || flags&linux.MSG_DONTWAIT != 0 { return int(n), syserr.FromError(err) } @@ -388,15 +389,23 @@ func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to [] s.EventRegister(&e, waiter.EventOut) defer s.EventUnregister(&e) + total := n for { - if n, err := src.CopyInTo(t, &w); err != syserror.ErrWouldBlock { - return int(n), syserr.FromError(err) + // Shorten src to reflect bytes previously written. + src = src.DropFirst64(n) + + n, err = src.CopyInTo(t, &w) + total += n + if err != syserror.ErrWouldBlock { + break } if err := t.Block(ch); err != nil { - return 0, syserr.FromError(err) + break } } + + return int(total), syserr.FromError(err) } // Passcred implements unix.Credentialer.Passcred. |