Method Open

pkg/sentry/devices/nvproxy/frontend.go:61–87

Open implements vfs.Device.Open.

(ctx context.Context, mnt *vfs.Mount, vfsd *vfs.Dentry, opts vfs.OpenOptions)

// Open implements vfs.Device.Open.
func (dev *frontendDevice) Open(ctx context.Context, mnt *vfs.Mount, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) {
	fd := &frontendFD{
		dev: dev,
	}
	var err error
	fd.hostFD, fd.containerName, err = openHostDevFile(ctx, dev.basename(), dev.nvp.useDevGofer, opts.Flags)
	if err != nil {
		return nil, err
	}
	if err := fd.vfsfd.Init(fd, opts.Flags, auth.CredentialsFromContext(ctx), mnt, vfsd, &vfs.FileDescriptionOptions{
		UseDentryMetadata: true,
	}); err != nil {
		unix.Close(int(fd.hostFD))
		return nil, err
	}
	fd.internalEntry.Init(fd, waiter.AllEvents)
	fd.internalQueue.EventRegister(&fd.internalEntry)
	if err := fdnotifier.AddFD(fd.hostFD, &fd.internalQueue); err != nil {
		unix.Close(int(fd.hostFD))
		return nil, err
	}
	fd.memmapFile.SetFD(int(fd.hostFD))
	fd.dev.nvp.fdsMu.Lock()
	defer fd.dev.nvp.fdsMu.Unlock()
	fd.dev.nvp.frontendFDs[fd] = struct{}{}
	return &fd.vfsfd, nil
}

// frontendFD implements vfs.FileDescriptionImpl for /dev/nvidia# and
// /dev/nvidiactl.