netdev - Re: [PATCH net] ipv4: include NLM_F_APPEND flag in append route notifications

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Date:	Wed, 17 Jun 2015 00:50:44 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Roopa Prabhu <roopa@...ulusnetworks.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] ipv4: include NLM_F_APPEND flag in append route notifications

On Tue, Jun 16, 2015 at 9:11 AM, Roopa Prabhu <roopa@...ulusnetworks.com> wrote:

[snip]

> @@ -1203,6 +1204,8 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
>
>                 if (!(cfg->fc_nlflags & NLM_F_APPEND))
>                         fa = fa_first;
> +               else
> +                       nlflags |= NLM_F_APPEND;
>         }

The if and else parts above don't seem logically related.  Maybe you
could initialize nlflags as:

    unsigned int nlflags = cfg->fc_nlflags & (NLM_F_REPLACE|NLM_F_APPEND);

And then pass rtmsg_fib(..., nlflags) to avoid the flag test/set?
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