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From: Anoob Joseph <Anoob.Joseph@caviumnetworks.com>
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Date: Tue, 3 Apr 2018 19:58:40 +0530
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Subject: Re: [dpdk-dev] [PATCH v3 4/5] examples/ipsec-secgw: handle ESN soft
limit event
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Adding maintainers of testpmd & lib/ethdev
Thanks,
Anoob
On 21/03/18 16:41, Anoob Joseph wrote:
> For inline protocol processing, the PMD/device is required to maintain
> the ESN. But the application is required to monitor ESN overflow to
> initiate SA expiry.
>
> For such cases, application would set the ESN soft limit. An IPsec event
> would be raised by rte_eth_event framework, when ESN hits the soft limit
> set by the application.
>
> Signed-off-by: Anoob Joseph <anoob.joseph@caviumnetworks.com>
> ---
> v3:
> * No change
>
> v2:
> * No change
>
> examples/ipsec-secgw/ipsec-secgw.c | 56 ++++++++++++++++++++++++++++++++++++++
> examples/ipsec-secgw/ipsec.c | 10 +++++--
> examples/ipsec-secgw/ipsec.h | 2 ++
> 3 files changed, 65 insertions(+), 3 deletions(-)
>
> diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
> index 3a8562e..5726fd3 100644
> --- a/examples/ipsec-secgw/ipsec-secgw.c
> +++ b/examples/ipsec-secgw/ipsec-secgw.c
> @@ -40,6 +40,7 @@
> #include <rte_hash.h>
> #include <rte_jhash.h>
> #include <rte_cryptodev.h>
> +#include <rte_security.h>
>
> #include "ipsec.h"
> #include "parser.h"
> @@ -1640,6 +1641,58 @@ pool_init(struct socket_ctx *ctx, int32_t socket_id, uint32_t nb_mbuf)
> printf("Allocated mbuf pool on socket %d\n", socket_id);
> }
>
> +static inline int
> +inline_ipsec_event_esn_overflow(struct rte_security_ctx *ctx, uint64_t md)
> +{
> + struct ipsec_sa *sa;
> +
> + /* For inline protocol processing, the metadata in the event will
> + * uniquely identify the security session which raised the event.
> + * Application would then need the userdata it had registered with the
> + * security session to process the event.
> + */
> +
> + sa = (struct ipsec_sa *)rte_security_get_userdata(ctx, md);
> +
> + if (sa == NULL) {
> + /* userdata could not be retrieved */
> + return -1;
> + }
> +
> + /* Sequence number over flow. SA need to be re-established */
> + RTE_SET_USED(sa);
> + return 0;
> +}
> +
> +static int
> +inline_ipsec_event_callback(uint16_t port_id, enum rte_eth_event_type type,
> + void *param, void *ret_param)
> +{
> + struct rte_eth_event_ipsec_desc *event_desc = NULL;
> + struct rte_security_ctx *ctx = (struct rte_security_ctx *)
> + rte_eth_dev_get_sec_ctx(port_id);
> +
> + RTE_SET_USED(param);
> +
> + if (type != RTE_ETH_EVENT_IPSEC)
> + return -1;
> +
> + event_desc = ret_param;
> + if (event_desc == NULL) {
> + printf("Event descriptor not set\n");
> + return -1;
> + }
> +
> + if (event_desc->stype == RTE_ETH_EVENT_IPSEC_ESN_OVERFLOW)
> + return inline_ipsec_event_esn_overflow(ctx, event_desc->md);
> + else if (event_desc->stype >= RTE_ETH_EVENT_IPSEC_MAX) {
> + printf("Invalid IPsec event reported\n");
> + return -1;
> + }
> +
> + return -1;
> +}
> +
> int32_t
> main(int32_t argc, char **argv)
> {
> @@ -1727,6 +1780,9 @@ main(int32_t argc, char **argv)
> */
> if (promiscuous_on)
> rte_eth_promiscuous_enable(portid);
> +
> + rte_eth_dev_callback_register(portid,
> + RTE_ETH_EVENT_IPSEC, inline_ipsec_event_callback, NULL);
> }
>
> check_all_ports_link_status(nb_ports, enabled_port_mask);
> diff --git a/examples/ipsec-secgw/ipsec.c b/examples/ipsec-secgw/ipsec.c
> index 5fb5bc1..acdd189 100644
> --- a/examples/ipsec-secgw/ipsec.c
> +++ b/examples/ipsec-secgw/ipsec.c
> @@ -36,6 +36,7 @@ set_ipsec_conf(struct ipsec_sa *sa, struct rte_security_ipsec_xform *ipsec)
> }
> /* TODO support for Transport and IPV6 tunnel */
> }
> + ipsec->esn_soft_limit = IPSEC_OFFLOAD_ESN_SOFTLIMIT;
> }
>
> static inline int
> @@ -270,11 +271,14 @@ create_session(struct ipsec_ctx *ipsec_ctx, struct ipsec_sa *sa)
> * the packet is received, this userdata will be
> * retrieved using the metadata from the packet.
> *
> - * This is required only for inbound SAs.
> + * The PMD is expected to set similar metadata for other
> + * operations, like rte_eth_event, which are tied to
> + * security session. In such cases, the userdata could
> + * be obtained to uniquely identify the security
> + * parameters denoted.
> */
>
> - if (sa->direction == RTE_SECURITY_IPSEC_SA_DIR_INGRESS)
> - sess_conf.userdata = (void *) sa;
> + sess_conf.userdata = (void *) sa;
>
> sa->sec_session = rte_security_session_create(ctx,
> &sess_conf, ipsec_ctx->session_pool);
> diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
> index 6059f6c..c1450f6 100644
> --- a/examples/ipsec-secgw/ipsec.h
> +++ b/examples/ipsec-secgw/ipsec.h
> @@ -21,6 +21,8 @@
>
> #define MAX_DIGEST_SIZE 32 /* Bytes -- 256 bits */
>
> +#define IPSEC_OFFLOAD_ESN_SOFTLIMIT 0xffffff00
> +
> #define IV_OFFSET (sizeof(struct rte_crypto_op) + \
> sizeof(struct rte_crypto_sym_op))
>