> -----Original Message-----
> From: Nicolau, Radu
> Sent: Thursday, October 19, 2017 12:57 PM
> To: Ananyev, Konstantin <konstantin.anan...@intel.com>; Akhil Goyal
> <akhil.go...@nxp.com>; dev@dpdk.org
> Cc: Doherty, Declan <declan.dohe...@intel.com>; De Lara Guarch, Pablo
> <pablo.de.lara.gua...@intel.com>; hemant.agra...@nxp.com;
> bor...@mellanox.com; avia...@mellanox.com; tho...@monjalon.net;
> sandeep.ma...@nxp.com; jerin.ja...@caviumnetworks.com;
> Mcnamara, John <john.mcnam...@intel.com>; shah...@mellanox.com;
> olivier.m...@6wind.com
> Subject: RE: [PATCH v4 10/12] net/ixgbe: enable inline ipsec
>
>
>
> > -----Original Message-----
> > From: Ananyev, Konstantin
> > Sent: Thursday, October 19, 2017 12:04 PM
> > To: Nicolau, Radu <radu.nico...@intel.com>; Akhil Goyal
> > <akhil.go...@nxp.com>; dev@dpdk.org
> > Cc: Doherty, Declan <declan.dohe...@intel.com>; De Lara Guarch, Pablo
> > <pablo.de.lara.gua...@intel.com>; hemant.agra...@nxp.com;
> > bor...@mellanox.com; avia...@mellanox.com; tho...@monjalon.net;
> > sandeep.ma...@nxp.com; jerin.ja...@caviumnetworks.com; Mcnamara,
> > John <john.mcnam...@intel.com>; shah...@mellanox.com;
> > olivier.m...@6wind.com
> > Subject: RE: [PATCH v4 10/12] net/ixgbe: enable inline ipsec
> >
> >
> >
> > > >
> > > >> <snip>
> > > >> +
> > > >> +static int
> > > >> +ixgbe_crypto_update_mb(void *device __rte_unused,
> > > >> + struct rte_security_session *session,
> > > >> + struct rte_mbuf *m, void *params __rte_unused) {
> > > >> + struct ixgbe_crypto_session *ic_session =
> > > >> + get_sec_session_private_data(session);
> > > >> + if (ic_session->op == IXGBE_OP_AUTHENTICATED_ENCRYPTION) {
> > > >> + struct ixgbe_crypto_tx_desc_md *mdata =
> > > >> + (struct ixgbe_crypto_tx_desc_md *)&m->udata64;
> > > >> + mdata->enc = 1;
> > > >> + mdata->sa_idx = ic_session->sa_index;
> > > >> + mdata->pad_len = *rte_pktmbuf_mtod_offset(m,
> > > >> + uint8_t *, rte_pktmbuf_pkt_len(m) - 18) + 18;
> > > > Could you explain what pad_len supposed to contain?
> > > > Also what is a magical constant '18'?
> > > > Could you create some macro if needed?
> > > I added an explanation in the code, we read the payload padding size
> > > that is stored at the len-18 bytes and add 18 bytes, 2 for ESP trailer
> > > and 16 for ICV.
> >
> > Ok, can we at least have a macros for all these constants?
> > Another question: you do use pkt_len() here - does it mean that multi-
> > segment packets are not supported by ixgbe-ipsec?
> > Konstantin
> It does support multisegment, but the pad_len has to be set only for single
> send, it will be ignored otherwise. I have updated the code to set
> it for single segment packets only.
Sorry, I didn't understand that.
If that function does support multiseg packets, then it has to go to the last
segment via m->next,
If it doesn't, then it should return an error I case of m->nb_seg != 1.
Right?
> Also, our test app does not support multisegment packets.
Ok, I suppose that means, multi-seg case wasn't tested :)
