netdev - Re: [PATCH 2/4] xfrm: cache bundles instead of policies for outgoing flows

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 6 Apr 2010 20:40:14 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Timo Teras <timo.teras@....fi>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 2/4] xfrm: cache bundles instead of policies for
	outgoing flows

On Mon, Apr 05, 2010 at 10:00:22AM +0300, Timo Teras wrote:
>
> @@ -623,33 +618,11 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
>  		schedule_work(&net->xfrm.policy_hash_work);
>  
>  	read_lock_bh(&xfrm_policy_lock);
> -	gc_list = NULL;
>  	entry = &policy->bydst;
> -	hlist_for_each_entry_continue(policy, entry, bydst) {
> -		struct dst_entry *dst;
> -
> -		write_lock(&policy->lock);
> -		dst = policy->bundles;
> -		if (dst) {
> -			struct dst_entry *tail = dst;
> -			while (tail->next)
> -				tail = tail->next;
> -			tail->next = gc_list;
> -			gc_list = dst;
> -
> -			policy->bundles = NULL;
> -		}
> -		write_unlock(&policy->lock);
> -	}
> +	hlist_for_each_entry_continue(policy, entry, bydst)
> +		atomic_inc(&policy->genid);

Do we still need this since we're invalidating the whole flow
cache?

The current code is necessary since otherwise the bundles won't
get freed.  But with your new code, this is essentially doing
nothing, no?

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html