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

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Message-ID: <4C085C9A.30506@redhat.com>
Date:	Fri, 04 Jun 2010 09:53:30 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Roland Dreier <rdreier@...co.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

On 06/04/10 00:39, Roland Dreier wrote:
>   >  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.
>

Yes, but I only found this case, is there any else?

Thanks!
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