[dpdk-dev] [PATCH v3 05/18] librte_acl: fix a bug at build phase that can cause matches beeing overwirtten.
Neil Horman
nhorman at tuxdriver.com
Mon Jan 26 13:08:15 CET 2015
On Sun, Jan 25, 2015 at 10:40:23PM +0000, Ananyev, Konstantin wrote:
> Hi Neil,
>
> > -----Original Message-----
> > From: Neil Horman [mailto:nhorman at tuxdriver.com]
> > Sent: Sunday, January 25, 2015 5:35 PM
> > To: Ananyev, Konstantin
> > Cc: dev at dpdk.org
> > Subject: Re: [dpdk-dev] [PATCH v3 05/18] librte_acl: fix a bug at build phase that can cause matches beeing overwirtten.
> >
> > On Tue, Jan 20, 2015 at 06:40:54PM +0000, Konstantin Ananyev wrote:
> > > Signed-off-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
> > > ---
> > > lib/librte_acl/acl_bld.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/lib/librte_acl/acl_bld.c b/lib/librte_acl/acl_bld.c
> > > index 8bf4a54..22f7934 100644
> > > --- a/lib/librte_acl/acl_bld.c
> > > +++ b/lib/librte_acl/acl_bld.c
> > > @@ -1907,7 +1907,7 @@ rte_acl_build(struct rte_acl_ctx *ctx, const struct rte_acl_config *cfg)
> > > bcx.num_tries, bcx.cfg.num_categories,
> > > RTE_ACL_MAX_FIELDS * RTE_DIM(bcx.tries) *
> > > sizeof(ctx->data_indexes[0]),
> > > - bcx.num_build_rules);
> > > + bcx.num_build_rules + 1);
> > > if (rc == 0) {
> > >
> > > /* set data indexes. */
> > > --
> > > 1.8.5.3
> > >
> > >
> > Shouldn't you add to num_build_rules inside rte_acl_gen? That way other future
> > users of the function don't have to remember to do so.
>
> In that patch, I just fix the bug to stop generate invalid tries for some corener cases.
> In the later patch in that set, I did something similar to what you are suggesting here -
> make rte_acl_gen() to allocate indexes for all match nodes too (as it already doing for all other nodes).
> See [PATCH v3 07/18] librte_acl: build/gen phase - simplify the way match nodes are allocated.
>
Ok, thank you
Neil
> Konstantin
>
> > Neil
>
>
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