linux-kernel - Re: [Patch] infiniband: check local reserved ports

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Message-ID: <ada1vcoqde3.fsf@roland-alpha.cisco.com>
Date:	Thu, 03 Jun 2010 09:39:16 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Amerigo Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	davem@...emloft.net, linux-rdma@...r.kernel.org,
	sean.hefty@...el.com
Subject: Re: [Patch] infiniband: check local reserved ports

 > Since Tetsuo's patch already got merged, now this is the missing part
 > for local port reservation.
 > 
 > Cc: Roland Dreier <rdreier@...co.com>
 > Cc: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
 > Signed-off-by: WANG Cong <amwang@...hat.com>
 > 
 > ---
 > diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
 > index b930b81..7b89bab 100644
 > --- a/drivers/infiniband/core/cma.c
 > +++ b/drivers/infiniband/core/cma.c
 > @@ -1978,6 +1978,7 @@ static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
 >  	rover = net_random() % remaining + low;
 >  retry:
 >  	if (last_used_port != rover &&
 > +	    !inet_is_reserved_local_port(rover) &&
 >  	    !idr_find(ps, (unsigned short) rover)) {
 >  		int ret = cma_alloc_port(ps, id_priv, rover);
 >  		/*

Should this inet_is_reserved_local_port() test apply to all the "port
spaces" that this code is handling?  I honestly am ignorant of the
intended semantics of the new local_reserved_ports stuff, hence my question.

 - R.
-- 
Roland Dreier <rolandd@...co.com> || For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/index.html
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