Re: [Xen-devel] [PATCH v8 06/17] libxl_qmp: Implementation of libxl__ev_qmp_*

[Ian Jackson <ian.jackson@xxxxxxxxxx>]

Anthony PERARD writes ("[PATCH v8 06/17] libxl_qmp: Implementation of 
libxl__ev_qmp_*"):
> This patch implement the API libxl__ev_qmp documented in the previous
> patch, "libxl: Design of an async API to issue QMP commands to QEMU".
> 
> Since this API is to interact with QEMU via the QMP protocol, it also
> implement a QMP client. The specification for the QEMU Machine Protocol
> (QMP) can be found in the QEMU repository at:
> https://git.qemu.org/?p=qemu.git;a=blob_plain;f=docs/interop/qmp-spec.txt

Thanks.  I have re-reviewed this and I have only this one question:

> +    while (ev->tx_buf_off < ev->tx_buf_len) {
> +        ssize_t max_write = ev->tx_buf_len - ev->tx_buf_off;
> +        r = write(fd, ev->tx_buf + ev->tx_buf_off, max_write);
> +        if (r < 0) {
> +            if (errno == EINTR)
> +                continue;
> +            if (errno == EWOULDBLOCK)
> +                break;
> +            LOGED(ERROR, ev->domid, "failed to write to QMP socket");
> +            return ERROR_FAIL;
> +        }
> +        assert(r >= 0 && r <= max_write);

Doesn't this want to be
  +        assert(r > 0 && r <= max_write);
?

Ian.

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