From owner-svn-src-head@freebsd.org  Fri Jul 17 11:41:57 2015
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 478539A3619;
 Fri, 17 Jul 2015 11:41:57 +0000 (UTC) (envelope-from jilles@stack.nl)
Received: from mx1.stack.nl (relay04.stack.nl [IPv6:2001:610:1108:5010::107])
 (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits))
 (Client CN "mailhost.stack.nl",
 Issuer "CA Cert Signing Authority" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 0E9A41206;
 Fri, 17 Jul 2015 11:41:57 +0000 (UTC) (envelope-from jilles@stack.nl)
Received: from snail.stack.nl (snail.stack.nl [IPv6:2001:610:1108:5010::131])
 by mx1.stack.nl (Postfix) with ESMTP id 06157B8056;
 Fri, 17 Jul 2015 13:41:54 +0200 (CEST)
Received: by snail.stack.nl (Postfix, from userid 1677)
 id E346528494; Fri, 17 Jul 2015 13:41:53 +0200 (CEST)
Date: Fri, 17 Jul 2015 13:41:53 +0200
From: Jilles Tjoelker <jilles@stack.nl>
To: Ed Schouten <ed@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r285539 - head/sys/compat/cloudabi64
Message-ID: <20150717114153.GA93168@stack.nl>
References: <201507141433.t6EEXLkn035058@repo.freebsd.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <201507141433.t6EEXLkn035058@repo.freebsd.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Jul 2015 11:41:57 -0000

On Tue, Jul 14, 2015 at 02:33:21PM +0000, Ed Schouten wrote:
> Author: ed
> Date: Tue Jul 14 14:33:21 2015
> New Revision: 285539
> URL: https://svnweb.freebsd.org/changeset/base/285539

> Log:
>   Implement {,p}{read,write}{,v}().

>   Add a routine similar to copyinuio() and freebsd32_copyinuio() that
>   copies in CloudABI's struct iovecs. These are then translated into
>   FreeBSD format and placed in a 'struct uio', so we can call into the
>   kern_*() functions.

> [snip]
> +	if (iovcnt > UIO_MAXIOV)
> +		return (EINVAL);

The maximum number of iovecs is part of the ABI and should therefore
probably have a CLOUDABI_* constant.

It turns out that both FreeBSD and Linux report 1024 for getconf
IOV_MAX, so there is little practical effect.

-- 
Jilles Tjoelker