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-rwxr-xr-xpkg/sentry/fsimpl/gofer/filesystem.go2
-rwxr-xr-xpkg/sentry/fsimpl/gofer/gofer.go6
2 files changed, 4 insertions, 4 deletions
diff --git a/pkg/sentry/fsimpl/gofer/filesystem.go b/pkg/sentry/fsimpl/gofer/filesystem.go
index 4a8411371..4a32821bd 100755
--- a/pkg/sentry/fsimpl/gofer/filesystem.go
+++ b/pkg/sentry/fsimpl/gofer/filesystem.go
@@ -686,6 +686,8 @@ func (fs *filesystem) MknodAt(ctx context.Context, rp *vfs.ResolvingPath, opts v
return fs.doCreateAt(ctx, rp, false /* dir */, func(parent *dentry, name string) error {
creds := rp.Credentials()
_, err := parent.file.mknod(ctx, name, (p9.FileMode)(opts.Mode), opts.DevMajor, opts.DevMinor, (p9.UID)(creds.EffectiveKUID), (p9.GID)(creds.EffectiveKGID))
+ // If the gofer does not allow creating a socket or pipe, create a
+ // synthetic one, i.e. one that is kept entirely in memory.
if err == syserror.EPERM {
switch opts.Mode.FileType() {
case linux.S_IFSOCK:
diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go
index 1d9caf127..9ab8fdc65 100755
--- a/pkg/sentry/fsimpl/gofer/gofer.go
+++ b/pkg/sentry/fsimpl/gofer/gofer.go
@@ -496,10 +496,8 @@ type dentry struct {
// file is the unopened p9.File that backs this dentry. file is immutable.
//
// If file.isNil(), this dentry represents a synthetic file, i.e. a file
- // that does not exist on the remote filesystem. As of this writing, this
- // is only possible for a directory created with
- // MkdirOptions.ForSyntheticMountpoint == true.
- // TODO(gvisor.dev/issue/1476): Support synthetic sockets (and pipes).
+ // that does not exist on the remote filesystem. As of this writing, the
+ // only files that can be synthetic are sockets, pipes, and directories.
file p9file
// If deleted is non-zero, the file represented by this dentry has been