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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 125e90d0-4049-4b12-3934-08d80c7c0b6d X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Jun 2020 13:50:17.6682 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: AqKmHF0EYQ/xKXJrlbRmdjgT2rrbfN/bV00nvt8CDjVp6pHe3c5Vz0drh2pMTUZqp4RAdsEytEKvBRee2VeEvQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4431 X-OriginatorOrg: intel.com Subject: Re: [dpdk-dev] [PATCH 2/3] cryptodev: add security operation to crypto operation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi Konstantin, see below > -----Original Message----- > From: Ananyev, Konstantin > Sent: Tuesday, June 9, 2020 2:23 PM >=20 >=20 > > > > /** Status of crypto operation */ > > @@ -121,6 +123,13 @@ struct rte_crypto_op { > > struct rte_crypto_asym_op asym[0]; > > /**< Asymmetric operation parameters */ > > > > +#ifdef RTE_LIBRTE_SECURITY > > + uint8_t security[0]; > > + /**< Security operation parameters > > + * - Must be accessed through a rte_security_op pointer > > + */ > > +#endif > > + > > }; /**< operation specific parameters */ }; >=20 > Is there any point to have this extra level of indirection? > Might be simply: >=20 > enum rte_crypto_op_type { > .... > + RTE_CRYPTO_OP_TYPE_SEC_DOCSIS, > }; > ... > struct rte_crypto_op { > .... > __extension__ > union { > struct rte_crypto_sym_op sym[0]; > /**< Symmetric operation parameters */ >=20 > struct rte_crypto_asym_op asym[0]; > /**< Asymmetric operation parameters */ >=20 > + struct rte_security_docsis_op docsis[0]; >=20 > }; /**< operation specific parameters */ >=20 > ? [DC] This was to allow some form of extensibility and not to limit this to = just DOCSIS. If it's felt that having the extra level of indirection is overkill, it can= be easily changed. However, we cannot include a struct of type 'struct rte_security_docsis_op'= (or 'struct rte_security_op') directly here, without creating nasty circular dependency of includes betwe= en rte_cryptodev and rte_security. I had tried defining an opaque version 'struct rte_security_op' (i.e. no fi= elds within the struct) here in rte_crypto.h, but the compiler complained that it couldn't determine the= size of the struct, even though it's a zero length array. That is why I had to use the uint8_t in 'uint8_t security[0];' - I don't li= ke this, but I couldn't find another way that kept the compiler happy and didn't create a circular depen= dency.