From 8ab0848c70fcebe377a0e7abdebf371022c96830 Mon Sep 17 00:00:00 2001 From: Andrei Vagin Date: Tue, 18 Jun 2019 01:42:28 -0700 Subject: gvisor/fs: don't update file.offset for sockets, pipes, etc sockets, pipes and other non-seekable file descriptors don't use file.offset, so we don't need to update it. With this change, we will be able to call file operations without locking the file.mu mutex. This is already used for pipes in the splice system call. PiperOrigin-RevId: 253746644 --- pkg/sentry/socket/unix/unix.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'pkg/sentry/socket/unix/unix.go') diff --git a/pkg/sentry/socket/unix/unix.go b/pkg/sentry/socket/unix/unix.go index 97db87f3e..5fc43db8c 100644 --- a/pkg/sentry/socket/unix/unix.go +++ b/pkg/sentry/socket/unix/unix.go @@ -64,7 +64,7 @@ type SocketOperations struct { func New(ctx context.Context, endpoint transport.Endpoint, stype linux.SockType) *fs.File { dirent := socket.NewDirent(ctx, unixSocketDevice) defer dirent.DecRef() - return NewWithDirent(ctx, dirent, endpoint, stype, fs.FileFlags{Read: true, Write: true}) + return NewWithDirent(ctx, dirent, endpoint, stype, fs.FileFlags{Read: true, Write: true, NonSeekable: true}) } // NewWithDirent creates a new unix socket using an existing dirent. -- cgit v1.2.3