[11/14] examples/ipsec-secgw: add app processing code

  From: Lukasz Bartosik <lbartosik@marvell.com>

Add IPsec application processing code for event mode.

Signed-off-by: Anoob Joseph <anoobj@marvell.com>
Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
---
 examples/ipsec-secgw/ipsec-secgw.c  | 124 ++++++------------
 examples/ipsec-secgw/ipsec-secgw.h  |  81 ++++++++++++
 examples/ipsec-secgw/ipsec.h        |  37 +++---
 examples/ipsec-secgw/ipsec_worker.c | 242 ++++++++++++++++++++++++++++++++++--
 examples/ipsec-secgw/ipsec_worker.h |  39 ++++++
 examples/ipsec-secgw/sa.c           |  11 --
 6 files changed, 409 insertions(+), 125 deletions(-)
 create mode 100644 examples/ipsec-secgw/ipsec-secgw.h
 create mode 100644 examples/ipsec-secgw/ipsec_worker.h
  

> 
> Add IPsec application processing code for event mode.
> 
> Signed-off-by: Anoob Joseph <anoobj@marvell.com>
> Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
> ---
>  examples/ipsec-secgw/ipsec-secgw.c  | 124 ++++++------------
>  examples/ipsec-secgw/ipsec-secgw.h  |  81 ++++++++++++
>  examples/ipsec-secgw/ipsec.h        |  37 +++---
>  examples/ipsec-secgw/ipsec_worker.c | 242 ++++++++++++++++++++++++++++++++++--
>  examples/ipsec-secgw/ipsec_worker.h |  39 ++++++
>  examples/ipsec-secgw/sa.c           |  11 --
>  6 files changed, 409 insertions(+), 125 deletions(-)
>  create mode 100644 examples/ipsec-secgw/ipsec-secgw.h
>  create mode 100644 examples/ipsec-secgw/ipsec_worker.h
> 
> diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
> index c5d95b9..2e7d4d8 100644
> --- a/examples/ipsec-secgw/ipsec-secgw.c
> +++ b/examples/ipsec-secgw/ipsec-secgw.c
> @@ -50,12 +50,11 @@
> 
>  #include "event_helper.h"
>  #include "ipsec.h"
> +#include "ipsec_worker.h"
>  #include "parser.h"
> 
>  volatile bool force_quit;
> 
> -#define RTE_LOGTYPE_IPSEC RTE_LOGTYPE_USER1
> -
>  #define MAX_JUMBO_PKT_LEN  9600
> 
>  #define MEMPOOL_CACHE_SIZE 256
> @@ -70,8 +69,6 @@ volatile bool force_quit;
> 
>  #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
> 
> -#define NB_SOCKETS 4
> -
>  /* Configure how many packets ahead to prefetch, when reading packets */
>  #define PREFETCH_OFFSET	3
> 
> @@ -79,8 +76,6 @@ volatile bool force_quit;
> 
>  #define MAX_LCORE_PARAMS 1024
> 
> -#define UNPROTECTED_PORT(port) (unprotected_port_mask & (1 << portid))
> -
>  /*
>   * Configurable number of RX/TX ring descriptors
>   */
> @@ -89,29 +84,6 @@ volatile bool force_quit;
>  static uint16_t nb_rxd = IPSEC_SECGW_RX_DESC_DEFAULT;
>  static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
> 
> -#if RTE_BYTE_ORDER != RTE_LITTLE_ENDIAN
> -#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
> -	(((uint64_t)((a) & 0xff) << 56) | \
> -	((uint64_t)((b) & 0xff) << 48) | \
> -	((uint64_t)((c) & 0xff) << 40) | \
> -	((uint64_t)((d) & 0xff) << 32) | \
> -	((uint64_t)((e) & 0xff) << 24) | \
> -	((uint64_t)((f) & 0xff) << 16) | \
> -	((uint64_t)((g) & 0xff) << 8)  | \
> -	((uint64_t)(h) & 0xff))
> -#else
> -#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
> -	(((uint64_t)((h) & 0xff) << 56) | \
> -	((uint64_t)((g) & 0xff) << 48) | \
> -	((uint64_t)((f) & 0xff) << 40) | \
> -	((uint64_t)((e) & 0xff) << 32) | \
> -	((uint64_t)((d) & 0xff) << 24) | \
> -	((uint64_t)((c) & 0xff) << 16) | \
> -	((uint64_t)((b) & 0xff) << 8) | \
> -	((uint64_t)(a) & 0xff))
> -#endif
> -#define ETHADDR(a, b, c, d, e, f) (__BYTES_TO_UINT64(a, b, c, d, e, f, 0, 0))
> -
>  #define ETHADDR_TO_UINT64(addr) __BYTES_TO_UINT64( \
>  		(addr)->addr_bytes[0], (addr)->addr_bytes[1], \
>  		(addr)->addr_bytes[2], (addr)->addr_bytes[3], \
> @@ -123,18 +95,6 @@ static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
> 
>  #define MTU_TO_FRAMELEN(x)	((x) + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
> 
> -/* port/source ethernet addr and destination ethernet addr */
> -struct ethaddr_info {
> -	uint64_t src, dst;
> -};
> -
> -struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS] = {
> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x7e, 0x94, 0x9a) },
> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x22, 0xa1, 0xd9) },
> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x08, 0x69, 0x26) },
> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x49, 0x9e, 0xdd) }
> -};
> -
>  struct flow_info flow_info_tbl[RTE_MAX_ETHPORTS];
> 
>  #define CMD_LINE_OPT_CONFIG		"config"
> @@ -192,10 +152,16 @@ static const struct option lgopts[] = {
>  	{NULL, 0, 0, 0}
>  };
> 
> +struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS] = {
> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x7e, 0x94, 0x9a) },
> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x22, 0xa1, 0xd9) },
> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x08, 0x69, 0x26) },
> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x49, 0x9e, 0xdd) }
> +};
> +
>  /* mask of enabled ports */
>  static uint32_t enabled_port_mask;
>  static uint64_t enabled_cryptodev_mask = UINT64_MAX;
> -static uint32_t unprotected_port_mask;
>  static int32_t promiscuous_on = 1;
>  static int32_t numa_on = 1; /**< NUMA is enabled by default. */
>  static uint32_t nb_lcores;
> @@ -283,8 +249,6 @@ static struct rte_eth_conf port_conf = {
>  	},
>  };
> 
> -static struct socket_ctx socket_ctx[NB_SOCKETS];
> -
>  /*
>   * Determine is multi-segment support required:
>   *  - either frame buffer size is smaller then mtu
> @@ -2828,47 +2792,10 @@ main(int32_t argc, char **argv)
> 
>  		sa_check_offloads(portid, &req_rx_offloads, &req_tx_offloads);
>  		port_init(portid, req_rx_offloads, req_tx_offloads);
> -		/* Create default ipsec flow for the ethernet device */
> -		ret = create_default_ipsec_flow(portid, req_rx_offloads);
> -		if (ret)
> -			printf("Cannot create default flow, err=%d, port=%d\n",
> -					ret, portid);
>  	}
> 
>  	cryptodevs_init();
> 
> -	/* start ports */
> -	RTE_ETH_FOREACH_DEV(portid) {
> -		if ((enabled_port_mask & (1 << portid)) == 0)
> -			continue;
> -
> -		/*
> -		 * Start device
> -		 * note: device must be started before a flow rule
> -		 * can be installed.
> -		 */
> -		ret = rte_eth_dev_start(portid);
> -		if (ret < 0)
> -			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: "
> -					"err=%d, port=%d\n", ret, portid);
> -		/*
> -		 * If enabled, put device in promiscuous mode.
> -		 * This allows IO forwarding mode to forward packets
> -		 * to itself through 2 cross-connected  ports of the
> -		 * target machine.
> -		 */
> -		if (promiscuous_on) {
> -			ret = rte_eth_promiscuous_enable(portid);
> -			if (ret != 0)
> -				rte_exit(EXIT_FAILURE,
> -					"rte_eth_promiscuous_enable: err=%s, port=%d\n",
> -					rte_strerror(-ret), portid);
> -		}
> -
> -		rte_eth_dev_callback_register(portid,
> -			RTE_ETH_EVENT_IPSEC, inline_ipsec_event_callback, NULL);
> -	}
> -
>  	/* fragment reassemble is enabled */
>  	if (frag_tbl_sz != 0) {
>  		ret = reassemble_init();
> @@ -2889,8 +2816,6 @@ main(int32_t argc, char **argv)
>  		}
>  	}
> 
> -	check_all_ports_link_status(enabled_port_mask);
> -
>  	/*
>  	 * Set the enabled port mask in helper config for use by helper
>  	 * sub-system. This will be used while intializing devices using
> @@ -2903,6 +2828,39 @@ main(int32_t argc, char **argv)
>  	if (ret < 0)
>  		rte_exit(EXIT_FAILURE, "eh_devs_init failed, err=%d\n", ret);
> 
> +	/* Create default ipsec flow for each port and start each port */
> +	RTE_ETH_FOREACH_DEV(portid) {
> +		if ((enabled_port_mask & (1 << portid)) == 0)
> +			continue;
> +
> +		ret = create_default_ipsec_flow(portid, req_rx_offloads);

That doesn't look right.
For more than one eth port in the system, req_rx_offloads will be overwritten by that moment.


> +		if (ret)
> +			printf("create_default_ipsec_flow failed, err=%d, "
> +			       "port=%d\n", ret, portid);
> +		/*
> +		 * Start device
> +		 * note: device must be started before a flow rule
> +		 * can be installed.
> +		 */
> +		ret = rte_eth_dev_start(portid);

Moving that piece of code (dev_start) after sa_init() breaks ixgbe inline-crypto support.
As I understand, because configured ipsec flows don't persist dev_start().
At least for ixgbe PMD.
Any reason why to move that code at all?

> +		if (ret < 0)
> +			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: "
> +					"err=%d, port=%d\n", ret, portid);
> +		/*
> +		 * If enabled, put device in promiscuous mode.
> +		 * This allows IO forwarding mode to forward packets
> +		 * to itself through 2 cross-connected  ports of the
> +		 * target machine.
> +		 */
> +		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(enabled_port_mask);
> +
>  	/* launch per-lcore init on every lcore */
>  	rte_eal_mp_remote_launch(ipsec_launch_one_lcore, eh_conf, CALL_MASTER);
>
  

> --- a/examples/ipsec-secgw/ipsec_worker.c
> +++ b/examples/ipsec-secgw/ipsec_worker.c
> @@ -15,6 +15,7 @@
>  #include <ctype.h>
>  #include <stdbool.h>
> 
> +#include <rte_acl.h>
>  #include <rte_common.h>
>  #include <rte_log.h>
>  #include <rte_memcpy.h>
> @@ -29,12 +30,51 @@
>  #include <rte_eventdev.h>
>  #include <rte_malloc.h>
>  #include <rte_mbuf.h>
> +#include <rte_lpm.h>
> +#include <rte_lpm6.h>
> 
>  #include "ipsec.h"
> +#include "ipsec_worker.h"
>  #include "event_helper.h"
> 
>  extern volatile bool force_quit;
> 
> +static inline enum pkt_type
> +process_ipsec_get_pkt_type(struct rte_mbuf *pkt, uint8_t **nlp)
> +{
> +	struct rte_ether_hdr *eth;
> +
> +	eth = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
> +	if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) {
> +		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
> +				offsetof(struct ip, ip_p));
> +		if (**nlp == IPPROTO_ESP)
> +			return PKT_TYPE_IPSEC_IPV4;
> +		else
> +			return PKT_TYPE_PLAIN_IPV4;
> +	} else if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
> +		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
> +				offsetof(struct ip6_hdr, ip6_nxt));
> +		if (**nlp == IPPROTO_ESP)
> +			return PKT_TYPE_IPSEC_IPV6;
> +		else
> +			return PKT_TYPE_PLAIN_IPV6;
> +	}
> +
> +	/* Unknown/Unsupported type */
> +	return PKT_TYPE_INVALID;
> +}

Looking though that file, it seems like you choose to create your own set of
helper functions, instead of trying to reuse existing ones: 

process_ipsec_get_pkt_type()  VS prepare_one_packet()
update_mac_addrs() VS prepare_tx_pkt()
check_sp() VS  inbound_sp_sa()

Obviously there is nothing good in code (and possible bugs) duplication.
Any reason why you can't reuse existing functions and need to reinvent your own?
 

> +
> +static inline void
> +update_mac_addrs(struct rte_mbuf *pkt, uint16_t portid)
> +{
> +	struct rte_ether_hdr *ethhdr;
> +
> +	ethhdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
> +	memcpy(&ethhdr->s_addr, &ethaddr_tbl[portid].src, RTE_ETHER_ADDR_LEN);
> +	memcpy(&ethhdr->d_addr, &ethaddr_tbl[portid].dst, RTE_ETHER_ADDR_LEN);
> +}
> +
>  static inline void
>  ipsec_event_pre_forward(struct rte_mbuf *m, unsigned int port_id)
>  {
> @@ -45,6 +85,177 @@ ipsec_event_pre_forward(struct rte_mbuf *m, unsigned int port_id)
>  	rte_event_eth_tx_adapter_txq_set(m, 0);
>  }
> 
> +static inline int
> +check_sp(struct sp_ctx *sp, const uint8_t *nlp, uint32_t *sa_idx)
> +{
> +	uint32_t res;
> +
> +	if (unlikely(sp == NULL))
> +		return 0;
> +
> +	rte_acl_classify((struct rte_acl_ctx *)sp, &nlp, &res, 1,
> +			DEFAULT_MAX_CATEGORIES);
> +
> +	if (unlikely(res == 0)) {
> +		/* No match */
> +		return 0;
> +	}
> +
> +	if (res == DISCARD)
> +		return 0;
> +	else if (res == BYPASS) {
> +		*sa_idx = 0;
> +		return 1;
> +	}
> +
> +	*sa_idx = SPI2IDX(res);
> +	if (*sa_idx < IPSEC_SA_MAX_ENTRIES)
> +		return 1;
> +
> +	/* Invalid SA IDX */
> +	return 0;
> +}
> +
> +static inline uint16_t
> +route4_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
> +{
> +	uint32_t dst_ip;
> +	uint16_t offset;
> +	uint32_t hop;
> +	int ret;
> +
> +	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip, ip_dst);
> +	dst_ip = *rte_pktmbuf_mtod_offset(pkt, uint32_t *, offset);
> +	dst_ip = rte_be_to_cpu_32(dst_ip);
> +
> +	ret = rte_lpm_lookup((struct rte_lpm *)rt_ctx, dst_ip, &hop);
> +
> +	if (ret == 0) {
> +		/* We have a hit */
> +		return hop;
> +	}
> +
> +	/* else */
> +	return RTE_MAX_ETHPORTS;
> +}
> +
> +/* TODO: To be tested */
> +static inline uint16_t
> +route6_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
> +{
> +	uint8_t dst_ip[16];
> +	uint8_t *ip6_dst;
> +	uint16_t offset;
> +	uint32_t hop;
> +	int ret;
> +
> +	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip6_hdr, ip6_dst);
> +	ip6_dst = rte_pktmbuf_mtod_offset(pkt, uint8_t *, offset);
> +	memcpy(&dst_ip[0], ip6_dst, 16);
> +
> +	ret = rte_lpm6_lookup((struct rte_lpm6 *)rt_ctx, dst_ip, &hop);
> +
> +	if (ret == 0) {
> +		/* We have a hit */
> +		return hop;
> +	}
> +
> +	/* else */
> +	return RTE_MAX_ETHPORTS;
> +}
> +
> +static inline uint16_t
> +get_route(struct rte_mbuf *pkt, struct route_table *rt, enum pkt_type type)
> +{
> +	if (type == PKT_TYPE_PLAIN_IPV4 || type == PKT_TYPE_IPSEC_IPV4)
> +		return route4_pkt(pkt, rt->rt4_ctx);
> +	else if (type == PKT_TYPE_PLAIN_IPV6 || type == PKT_TYPE_IPSEC_IPV6)
> +		return route6_pkt(pkt, rt->rt6_ctx);
> +
> +	return RTE_MAX_ETHPORTS;
> +}
> +
> +static inline int
> +process_ipsec_ev_inbound(struct ipsec_ctx *ctx, struct route_table *rt,
> +		struct rte_event *ev)
> +{
> +	struct ipsec_sa *sa = NULL;
> +	struct rte_mbuf *pkt;
> +	uint16_t port_id = 0;
> +	enum pkt_type type;
> +	uint32_t sa_idx;
> +	uint8_t *nlp;
> +
> +	/* Get pkt from event */
> +	pkt = ev->mbuf;
> +
> +	/* Check the packet type */
> +	type = process_ipsec_get_pkt_type(pkt, &nlp);
> +
> +	switch (type) {
> +	case PKT_TYPE_PLAIN_IPV4:
> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> +			sa = (struct ipsec_sa *) pkt->udata64;
> +
> +		/* Check if we have a match */
> +		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
> +			/* No valid match */
> +			goto drop_pkt_and_exit;
> +		}
> +		break;
> +
> +	case PKT_TYPE_PLAIN_IPV6:
> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> +			sa = (struct ipsec_sa *) pkt->udata64;
> +
> +		/* Check if we have a match */
> +		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
> +			/* No valid match */
> +			goto drop_pkt_and_exit;
> +		}
> +		break;
> +
> +	default:
> +		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
> +		goto drop_pkt_and_exit;
> +	}
> +
> +	/* Check if the packet has to be bypassed */
> +	if (sa_idx == 0)
> +		goto route_and_send_pkt;
> +
> +	/* Else the packet has to be protected with SA */
> +
> +	/* If the packet was IPsec processed, then SA pointer should be set */
> +	if (sa == NULL)
> +		goto drop_pkt_and_exit;
> +
> +	/* SPI on the packet should match with the one in SA */
> +	if (unlikely(sa->spi != sa_idx))
> +		goto drop_pkt_and_exit;
> +
> +route_and_send_pkt:
> +	port_id = get_route(pkt, rt, type);
> +	if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
> +		/* no match */
> +		goto drop_pkt_and_exit;
> +	}
> +	/* else, we have a matching route */
> +
> +	/* Update mac addresses */
> +	update_mac_addrs(pkt, port_id);
> +
> +	/* Update the event with the dest port */
> +	ipsec_event_pre_forward(pkt, port_id);
> +	return 1;
> +
> +drop_pkt_and_exit:
> +	RTE_LOG(ERR, IPSEC, "Inbound packet dropped\n");
> +	rte_pktmbuf_free(pkt);
> +	ev->mbuf = NULL;
> +	return 0;
> +}
> +
>  /*
>   * Event mode exposes various operating modes depending on the
>   * capabilities of the event device and the operating mode
> @@ -134,11 +345,11 @@ static void
>  ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>  		uint8_t nb_links)
>  {
> +	struct lcore_conf_ev_tx_int_port_wrkr lconf;
>  	unsigned int nb_rx = 0;
> -	unsigned int port_id;
> -	struct rte_mbuf *pkt;
>  	struct rte_event ev;
>  	uint32_t lcore_id;
> +	int32_t socket_id;
> 
>  	/* Check if we have links registered for this lcore */
>  	if (nb_links == 0) {
> @@ -151,6 +362,21 @@ ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>  	/* Get core ID */
>  	lcore_id = rte_lcore_id();
> 
> +	/* Get socket ID */
> +	socket_id = rte_lcore_to_socket_id(lcore_id);
> +
> +	/* Save routing table */
> +	lconf.rt.rt4_ctx = socket_ctx[socket_id].rt_ip4;
> +	lconf.rt.rt6_ctx = socket_ctx[socket_id].rt_ip6;
> +	lconf.inbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_in;
> +	lconf.inbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_in;
> +	lconf.inbound.sa_ctx = socket_ctx[socket_id].sa_in;
> +	lconf.inbound.session_pool = socket_ctx[socket_id].session_pool;
> +	lconf.outbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_out;
> +	lconf.outbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_out;
> +	lconf.outbound.sa_ctx = socket_ctx[socket_id].sa_out;
> +	lconf.outbound.session_pool = socket_ctx[socket_id].session_pool;
> +
>  	RTE_LOG(INFO, IPSEC,
>  		"Launching event mode worker (non-burst - Tx internal port - "
>  		"app mode - inbound) on lcore %d\n", lcore_id);
> @@ -175,13 +401,11 @@ ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>  		if (nb_rx == 0)
>  			continue;
> 
> -		port_id = ev.queue_id;
> -		pkt = ev.mbuf;
> -
> -		rte_prefetch0(rte_pktmbuf_mtod(pkt, void *));
> -
> -		/* Process packet */
> -		ipsec_event_pre_forward(pkt, port_id);
> +		if (process_ipsec_ev_inbound(&lconf.inbound,
> +				&lconf.rt, &ev) != 1) {
> +			/* The pkt has been dropped */
> +			continue;
> +		}
> 
>  		/*
>  		 * Since tx internal port is available, events can be
> diff --git a/examples/ipsec-secgw/ipsec_worker.h b/examples/ipsec-secgw/ipsec_worker.h
> new file mode 100644
> index 0000000..fd18a2e
> --- /dev/null
> +++ b/examples/ipsec-secgw/ipsec_worker.h
> @@ -0,0 +1,39 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2018 Cavium, Inc
> + */
> +#ifndef _IPSEC_WORKER_H_
> +#define _IPSEC_WORKER_H_
> +
> +#include "ipsec.h"
> +
> +enum pkt_type {
> +	PKT_TYPE_PLAIN_IPV4 = 1,
> +	PKT_TYPE_IPSEC_IPV4,
> +	PKT_TYPE_PLAIN_IPV6,
> +	PKT_TYPE_IPSEC_IPV6,
> +	PKT_TYPE_INVALID
> +};
> +
> +struct route_table {
> +	struct rt_ctx *rt4_ctx;
> +	struct rt_ctx *rt6_ctx;
> +};
> +
> +/*
> + * Conf required by event mode worker with tx internal port
> + */
> +struct lcore_conf_ev_tx_int_port_wrkr {
> +	struct ipsec_ctx inbound;
> +	struct ipsec_ctx outbound;
> +	struct route_table rt;
> +} __rte_cache_aligned;
> +
> +/* TODO
> + *
> + * Move this function to ipsec_worker.c
> + */
> +void ipsec_poll_mode_worker(void);
> +
> +int ipsec_launch_one_lcore(void *args);
> +
> +#endif /* _IPSEC_WORKER_H_ */
> diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
> index 7f046e3..9e17ba0 100644
> --- a/examples/ipsec-secgw/sa.c
> +++ b/examples/ipsec-secgw/sa.c
> @@ -772,17 +772,6 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
>  	printf("\n");
>  }
> 
> -struct sa_ctx {
> -	void *satbl; /* pointer to array of rte_ipsec_sa objects*/
> -	struct ipsec_sa sa[IPSEC_SA_MAX_ENTRIES];
> -	union {
> -		struct {
> -			struct rte_crypto_sym_xform a;
> -			struct rte_crypto_sym_xform b;
> -		};
> -	} xf[IPSEC_SA_MAX_ENTRIES];
> -};
> -
>  static struct sa_ctx *
>  sa_create(const char *name, int32_t socket_id)
>  {
> --
> 2.7.4
  

> +static inline int
> +process_ipsec_ev_inbound(struct ipsec_ctx *ctx, struct route_table *rt,
> +		struct rte_event *ev)
> +{
> +	struct ipsec_sa *sa = NULL;
> +	struct rte_mbuf *pkt;
> +	uint16_t port_id = 0;
> +	enum pkt_type type;
> +	uint32_t sa_idx;
> +	uint8_t *nlp;
> +
> +	/* Get pkt from event */
> +	pkt = ev->mbuf;
> +
> +	/* Check the packet type */
> +	type = process_ipsec_get_pkt_type(pkt, &nlp);
> +
> +	switch (type) {
> +	case PKT_TYPE_PLAIN_IPV4:
> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> +			sa = (struct ipsec_sa *) pkt->udata64;


Shouldn't packets with PKT_RX_SEC_OFFLOAD_FAIL be handled somehow?
Another question - as I can see from the code, right now event mode 
supports only inline-proto, correct?
If so, then probably an error should be reported at startup, if in config file
some other types of sessions were requested.    

> +
> +		/* Check if we have a match */
> +		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
> +			/* No valid match */
> +			goto drop_pkt_and_exit;
> +		}
> +		break;
> +
> +	case PKT_TYPE_PLAIN_IPV6:
> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> +			sa = (struct ipsec_sa *) pkt->udata64;
> +
> +		/* Check if we have a match */
> +		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
> +			/* No valid match */
> +			goto drop_pkt_and_exit;
> +		}
> +		break;
> +
> +	default:
> +		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
> +		goto drop_pkt_and_exit;
> +	}
> +
> +	/* Check if the packet has to be bypassed */
> +	if (sa_idx == 0)
> +		goto route_and_send_pkt;
> +
> +	/* Else the packet has to be protected with SA */
> +
> +	/* If the packet was IPsec processed, then SA pointer should be set */
> +	if (sa == NULL)
> +		goto drop_pkt_and_exit;
> +
> +	/* SPI on the packet should match with the one in SA */
> +	if (unlikely(sa->spi != sa_idx))
> +		goto drop_pkt_and_exit;
> +
> +route_and_send_pkt:
> +	port_id = get_route(pkt, rt, type);
> +	if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
> +		/* no match */
> +		goto drop_pkt_and_exit;
> +	}
> +	/* else, we have a matching route */
> +
> +	/* Update mac addresses */
> +	update_mac_addrs(pkt, port_id);
> +
> +	/* Update the event with the dest port */
> +	ipsec_event_pre_forward(pkt, port_id);
> +	return 1;
> +
> +drop_pkt_and_exit:
> +	RTE_LOG(ERR, IPSEC, "Inbound packet dropped\n");
> +	rte_pktmbuf_free(pkt);
> +	ev->mbuf = NULL;
> +	return 0;
> +}
> +
  

Hi Konstantin,

Please see inline.

Thanks,
Anoob

> -----Original Message-----
> From: Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Sent: Wednesday, December 25, 2019 8:49 PM
> To: Anoob Joseph <anoobj@marvell.com>; Akhil Goyal <akhil.goyal@nxp.com>;
> Nicolau, Radu <radu.nicolau@intel.com>; Thomas Monjalon
> <thomas@monjalon.net>
> Cc: Lukas Bartosik <lbartosik@marvell.com>; Jerin Jacob Kollanukkaran
> <jerinj@marvell.com>; Narayana Prasad Raju Athreya
> <pathreya@marvell.com>; Ankur Dwivedi <adwivedi@marvell.com>; Archana
> Muniganti <marchana@marvell.com>; Tejasree Kondoj
> <ktejasree@marvell.com>; Vamsi Krishna Attunuru <vattunuru@marvell.com>;
> dev@dpdk.org
> Subject: [EXT] RE: [PATCH 11/14] examples/ipsec-secgw: add app processing
> code
> 
> External Email
> 
> ----------------------------------------------------------------------
> 
> > +static inline int
> > +process_ipsec_ev_inbound(struct ipsec_ctx *ctx, struct route_table *rt,
> > +		struct rte_event *ev)
> > +{
> > +	struct ipsec_sa *sa = NULL;
> > +	struct rte_mbuf *pkt;
> > +	uint16_t port_id = 0;
> > +	enum pkt_type type;
> > +	uint32_t sa_idx;
> > +	uint8_t *nlp;
> > +
> > +	/* Get pkt from event */
> > +	pkt = ev->mbuf;
> > +
> > +	/* Check the packet type */
> > +	type = process_ipsec_get_pkt_type(pkt, &nlp);
> > +
> > +	switch (type) {
> > +	case PKT_TYPE_PLAIN_IPV4:
> > +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> > +			sa = (struct ipsec_sa *) pkt->udata64;
> 
> 
> Shouldn't packets with PKT_RX_SEC_OFFLOAD_FAIL be handled somehow?

[Anoob] Yes. Will fix this in v2.
 
> Another question - as I can see from the code, right now event mode supports
> only inline-proto, correct?
> If so, then probably an error should be reported at startup, if in config file
> some other types of sessions were requested.

[Anoob] Okay. Will add this in v2.
 
> 
> > +
> > +		/* Check if we have a match */
> > +		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
> > +			/* No valid match */
> > +			goto drop_pkt_and_exit;
> > +		}
> > +		break;
> > +
> > +	case PKT_TYPE_PLAIN_IPV6:
> > +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
> > +			sa = (struct ipsec_sa *) pkt->udata64;
> > +
> > +		/* Check if we have a match */
> > +		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
> > +			/* No valid match */
> > +			goto drop_pkt_and_exit;
> > +		}
> > +		break;
> > +
> > +	default:
> > +		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
> > +		goto drop_pkt_and_exit;
> > +	}
> > +
> > +	/* Check if the packet has to be bypassed */
> > +	if (sa_idx == 0)
> > +		goto route_and_send_pkt;
> > +
> > +	/* Else the packet has to be protected with SA */
> > +
> > +	/* If the packet was IPsec processed, then SA pointer should be set */
> > +	if (sa == NULL)
> > +		goto drop_pkt_and_exit;
> > +
> > +	/* SPI on the packet should match with the one in SA */
> > +	if (unlikely(sa->spi != sa_idx))
> > +		goto drop_pkt_and_exit;
> > +
> > +route_and_send_pkt:
> > +	port_id = get_route(pkt, rt, type);
> > +	if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
> > +		/* no match */
> > +		goto drop_pkt_and_exit;
> > +	}
> > +	/* else, we have a matching route */
> > +
> > +	/* Update mac addresses */
> > +	update_mac_addrs(pkt, port_id);
> > +
> > +	/* Update the event with the dest port */
> > +	ipsec_event_pre_forward(pkt, port_id);
> > +	return 1;
> > +
> > +drop_pkt_and_exit:
> > +	RTE_LOG(ERR, IPSEC, "Inbound packet dropped\n");
> > +	rte_pktmbuf_free(pkt);
> > +	ev->mbuf = NULL;
> > +	return 0;
> > +}
> > +
  

Hi Konstantin,

Please see inline.

Thanks,
Lukasz

On 23.12.2019 17:49, Ananyev, Konstantin wrote:
> External Email
> 
> ----------------------------------------------------------------------
> 
> 
>>
>> Add IPsec application processing code for event mode.
>>
>> Signed-off-by: Anoob Joseph <anoobj@marvell.com>
>> Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
>> ---
>>  examples/ipsec-secgw/ipsec-secgw.c  | 124 ++++++------------
>>  examples/ipsec-secgw/ipsec-secgw.h  |  81 ++++++++++++
>>  examples/ipsec-secgw/ipsec.h        |  37 +++---
>>  examples/ipsec-secgw/ipsec_worker.c | 242 ++++++++++++++++++++++++++++++++++--
>>  examples/ipsec-secgw/ipsec_worker.h |  39 ++++++
>>  examples/ipsec-secgw/sa.c           |  11 --
>>  6 files changed, 409 insertions(+), 125 deletions(-)
>>  create mode 100644 examples/ipsec-secgw/ipsec-secgw.h
>>  create mode 100644 examples/ipsec-secgw/ipsec_worker.h
>>
>> diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
>> index c5d95b9..2e7d4d8 100644
>> --- a/examples/ipsec-secgw/ipsec-secgw.c
>> +++ b/examples/ipsec-secgw/ipsec-secgw.c
>> @@ -50,12 +50,11 @@
>>
>>  #include "event_helper.h"
>>  #include "ipsec.h"
>> +#include "ipsec_worker.h"
>>  #include "parser.h"
>>
>>  volatile bool force_quit;
>>
>> -#define RTE_LOGTYPE_IPSEC RTE_LOGTYPE_USER1
>> -
>>  #define MAX_JUMBO_PKT_LEN  9600
>>
>>  #define MEMPOOL_CACHE_SIZE 256
>> @@ -70,8 +69,6 @@ volatile bool force_quit;
>>
>>  #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
>>
>> -#define NB_SOCKETS 4
>> -
>>  /* Configure how many packets ahead to prefetch, when reading packets */
>>  #define PREFETCH_OFFSET	3
>>
>> @@ -79,8 +76,6 @@ volatile bool force_quit;
>>
>>  #define MAX_LCORE_PARAMS 1024
>>
>> -#define UNPROTECTED_PORT(port) (unprotected_port_mask & (1 << portid))
>> -
>>  /*
>>   * Configurable number of RX/TX ring descriptors
>>   */
>> @@ -89,29 +84,6 @@ volatile bool force_quit;
>>  static uint16_t nb_rxd = IPSEC_SECGW_RX_DESC_DEFAULT;
>>  static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
>>
>> -#if RTE_BYTE_ORDER != RTE_LITTLE_ENDIAN
>> -#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
>> -	(((uint64_t)((a) & 0xff) << 56) | \
>> -	((uint64_t)((b) & 0xff) << 48) | \
>> -	((uint64_t)((c) & 0xff) << 40) | \
>> -	((uint64_t)((d) & 0xff) << 32) | \
>> -	((uint64_t)((e) & 0xff) << 24) | \
>> -	((uint64_t)((f) & 0xff) << 16) | \
>> -	((uint64_t)((g) & 0xff) << 8)  | \
>> -	((uint64_t)(h) & 0xff))
>> -#else
>> -#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
>> -	(((uint64_t)((h) & 0xff) << 56) | \
>> -	((uint64_t)((g) & 0xff) << 48) | \
>> -	((uint64_t)((f) & 0xff) << 40) | \
>> -	((uint64_t)((e) & 0xff) << 32) | \
>> -	((uint64_t)((d) & 0xff) << 24) | \
>> -	((uint64_t)((c) & 0xff) << 16) | \
>> -	((uint64_t)((b) & 0xff) << 8) | \
>> -	((uint64_t)(a) & 0xff))
>> -#endif
>> -#define ETHADDR(a, b, c, d, e, f) (__BYTES_TO_UINT64(a, b, c, d, e, f, 0, 0))
>> -
>>  #define ETHADDR_TO_UINT64(addr) __BYTES_TO_UINT64( \
>>  		(addr)->addr_bytes[0], (addr)->addr_bytes[1], \
>>  		(addr)->addr_bytes[2], (addr)->addr_bytes[3], \
>> @@ -123,18 +95,6 @@ static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
>>
>>  #define MTU_TO_FRAMELEN(x)	((x) + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
>>
>> -/* port/source ethernet addr and destination ethernet addr */
>> -struct ethaddr_info {
>> -	uint64_t src, dst;
>> -};
>> -
>> -struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS] = {
>> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x7e, 0x94, 0x9a) },
>> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x22, 0xa1, 0xd9) },
>> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x08, 0x69, 0x26) },
>> -	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x49, 0x9e, 0xdd) }
>> -};
>> -
>>  struct flow_info flow_info_tbl[RTE_MAX_ETHPORTS];
>>
>>  #define CMD_LINE_OPT_CONFIG		"config"
>> @@ -192,10 +152,16 @@ static const struct option lgopts[] = {
>>  	{NULL, 0, 0, 0}
>>  };
>>
>> +struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS] = {
>> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x7e, 0x94, 0x9a) },
>> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x22, 0xa1, 0xd9) },
>> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x08, 0x69, 0x26) },
>> +	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x49, 0x9e, 0xdd) }
>> +};
>> +
>>  /* mask of enabled ports */
>>  static uint32_t enabled_port_mask;
>>  static uint64_t enabled_cryptodev_mask = UINT64_MAX;
>> -static uint32_t unprotected_port_mask;
>>  static int32_t promiscuous_on = 1;
>>  static int32_t numa_on = 1; /**< NUMA is enabled by default. */
>>  static uint32_t nb_lcores;
>> @@ -283,8 +249,6 @@ static struct rte_eth_conf port_conf = {
>>  	},
>>  };
>>
>> -static struct socket_ctx socket_ctx[NB_SOCKETS];
>> -
>>  /*
>>   * Determine is multi-segment support required:
>>   *  - either frame buffer size is smaller then mtu
>> @@ -2828,47 +2792,10 @@ main(int32_t argc, char **argv)
>>
>>  		sa_check_offloads(portid, &req_rx_offloads, &req_tx_offloads);
>>  		port_init(portid, req_rx_offloads, req_tx_offloads);
>> -		/* Create default ipsec flow for the ethernet device */
>> -		ret = create_default_ipsec_flow(portid, req_rx_offloads);
>> -		if (ret)
>> -			printf("Cannot create default flow, err=%d, port=%d\n",
>> -					ret, portid);
>>  	}
>>
>>  	cryptodevs_init();
>>
>> -	/* start ports */
>> -	RTE_ETH_FOREACH_DEV(portid) {
>> -		if ((enabled_port_mask & (1 << portid)) == 0)
>> -			continue;
>> -
>> -		/*
>> -		 * Start device
>> -		 * note: device must be started before a flow rule
>> -		 * can be installed.
>> -		 */
>> -		ret = rte_eth_dev_start(portid);
>> -		if (ret < 0)
>> -			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: "
>> -					"err=%d, port=%d\n", ret, portid);
>> -		/*
>> -		 * If enabled, put device in promiscuous mode.
>> -		 * This allows IO forwarding mode to forward packets
>> -		 * to itself through 2 cross-connected  ports of the
>> -		 * target machine.
>> -		 */
>> -		if (promiscuous_on) {
>> -			ret = rte_eth_promiscuous_enable(portid);
>> -			if (ret != 0)
>> -				rte_exit(EXIT_FAILURE,
>> -					"rte_eth_promiscuous_enable: err=%s, port=%d\n",
>> -					rte_strerror(-ret), portid);
>> -		}
>> -
>> -		rte_eth_dev_callback_register(portid,
>> -			RTE_ETH_EVENT_IPSEC, inline_ipsec_event_callback, NULL);
>> -	}
>> -
>>  	/* fragment reassemble is enabled */
>>  	if (frag_tbl_sz != 0) {
>>  		ret = reassemble_init();
>> @@ -2889,8 +2816,6 @@ main(int32_t argc, char **argv)
>>  		}
>>  	}
>>
>> -	check_all_ports_link_status(enabled_port_mask);
>> -
>>  	/*
>>  	 * Set the enabled port mask in helper config for use by helper
>>  	 * sub-system. This will be used while intializing devices using
>> @@ -2903,6 +2828,39 @@ main(int32_t argc, char **argv)
>>  	if (ret < 0)
>>  		rte_exit(EXIT_FAILURE, "eh_devs_init failed, err=%d\n", ret);
>>
>> +	/* Create default ipsec flow for each port and start each port */
>> +	RTE_ETH_FOREACH_DEV(portid) {
>> +		if ((enabled_port_mask & (1 << portid)) == 0)
>> +			continue;
>> +
>> +		ret = create_default_ipsec_flow(portid, req_rx_offloads);
> 
> That doesn't look right.
> For more than one eth port in the system, req_rx_offloads will be overwritten by that moment.

[Lukasz] You're right. I will fix it in v2.

> 
>> +		if (ret)
>> +			printf("create_default_ipsec_flow failed, err=%d, "
>> +			       "port=%d\n", ret, portid);
>> +		/*
>> +		 * Start device
>> +		 * note: device must be started before a flow rule
>> +		 * can be installed.
>> +		 */
>> +		ret = rte_eth_dev_start(portid);
> 
> Moving that piece of code (dev_start) after sa_init() breaks ixgbe inline-crypto support.
> As I understand, because configured ipsec flows don't persist dev_start().
> At least for ixgbe PMD.
> Any reason why to move that code at all?

[Lukasz] We moved starting eth port after creation of default ipsec flow in order to stop packets from temporary omitting inline (after eth port is started but before flow is created)
. This happens if traffic is flowing and ipsec-secgw app is started. 
However moving eth_dev_start after sa_init is not necessary. I will revert this change to start eth ports before sa_init.

>> +		if (ret < 0)
>> +			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: "
>> +					"err=%d, port=%d\n", ret, portid);
>> +		/*
>> +		 * If enabled, put device in promiscuous mode.
>> +		 * This allows IO forwarding mode to forward packets
>> +		 * to itself through 2 cross-connected  ports of the
>> +		 * target machine.
>> +		 */
>> +		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(enabled_port_mask);
>> +
>>  	/* launch per-lcore init on every lcore */
>>  	rte_eal_mp_remote_launch(ipsec_launch_one_lcore, eh_conf, CALL_MASTER);
>>
  

Hi Konstantin,

Please see inline.

Thanks,
Lukasz

On 24.12.2019 14:13, Ananyev, Konstantin wrote:
> External Email
> 
> ----------------------------------------------------------------------
> 
>> --- a/examples/ipsec-secgw/ipsec_worker.c
>> +++ b/examples/ipsec-secgw/ipsec_worker.c
>> @@ -15,6 +15,7 @@
>>  #include <ctype.h>
>>  #include <stdbool.h>
>>
>> +#include <rte_acl.h>
>>  #include <rte_common.h>
>>  #include <rte_log.h>
>>  #include <rte_memcpy.h>
>> @@ -29,12 +30,51 @@
>>  #include <rte_eventdev.h>
>>  #include <rte_malloc.h>
>>  #include <rte_mbuf.h>
>> +#include <rte_lpm.h>
>> +#include <rte_lpm6.h>
>>
>>  #include "ipsec.h"
>> +#include "ipsec_worker.h"
>>  #include "event_helper.h"
>>
>>  extern volatile bool force_quit;
>>
>> +static inline enum pkt_type
>> +process_ipsec_get_pkt_type(struct rte_mbuf *pkt, uint8_t **nlp)
>> +{
>> +	struct rte_ether_hdr *eth;
>> +
>> +	eth = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
>> +	if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) {
>> +		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
>> +				offsetof(struct ip, ip_p));
>> +		if (**nlp == IPPROTO_ESP)
>> +			return PKT_TYPE_IPSEC_IPV4;
>> +		else
>> +			return PKT_TYPE_PLAIN_IPV4;
>> +	} else if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
>> +		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
>> +				offsetof(struct ip6_hdr, ip6_nxt));
>> +		if (**nlp == IPPROTO_ESP)
>> +			return PKT_TYPE_IPSEC_IPV6;
>> +		else
>> +			return PKT_TYPE_PLAIN_IPV6;
>> +	}
>> +
>> +	/* Unknown/Unsupported type */
>> +	return PKT_TYPE_INVALID;
>> +}
> 
> Looking though that file, it seems like you choose to create your own set of
> helper functions, instead of trying to reuse existing ones: 
> 
> process_ipsec_get_pkt_type()  VS prepare_one_packet()
> update_mac_addrs() VS prepare_tx_pkt()
> check_sp() VS  inbound_sp_sa()
> 
> Obviously there is nothing good in code (and possible bugs) duplication.
> Any reason why you can't reuse existing functions and need to reinvent your own?

[Lukasz] The prepare_one_packet() and prepare_tx_pkt() do much more than we need and for performance reasons
we crafted new functions. For example process_ipsec_get_pkt_type function returns nlp and whether
packet type is plain or IPsec. That's all. Prepare_one_packet() process packets in chunks and does much more -
it adjusts mbuf and ipv4 lengths then it demultiplex packet into plan and IPsec flows and finally does 
inline checks. This is similar for update_mac_addrs() vs prepare_tx_pkt() and check_sp() vs inbound_sp_sa()
that prepare_tx_pkt() and inbound_sp_sa() do more that we need in event mode.

> 
>> +
>> +static inline void
>> +update_mac_addrs(struct rte_mbuf *pkt, uint16_t portid)
>> +{
>> +	struct rte_ether_hdr *ethhdr;
>> +
>> +	ethhdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
>> +	memcpy(&ethhdr->s_addr, &ethaddr_tbl[portid].src, RTE_ETHER_ADDR_LEN);
>> +	memcpy(&ethhdr->d_addr, &ethaddr_tbl[portid].dst, RTE_ETHER_ADDR_LEN);
>> +}
>> +
>>  static inline void
>>  ipsec_event_pre_forward(struct rte_mbuf *m, unsigned int port_id)
>>  {
>> @@ -45,6 +85,177 @@ ipsec_event_pre_forward(struct rte_mbuf *m, unsigned int port_id)
>>  	rte_event_eth_tx_adapter_txq_set(m, 0);
>>  }
>>
>> +static inline int
>> +check_sp(struct sp_ctx *sp, const uint8_t *nlp, uint32_t *sa_idx)
>> +{
>> +	uint32_t res;
>> +
>> +	if (unlikely(sp == NULL))
>> +		return 0;
>> +
>> +	rte_acl_classify((struct rte_acl_ctx *)sp, &nlp, &res, 1,
>> +			DEFAULT_MAX_CATEGORIES);
>> +
>> +	if (unlikely(res == 0)) {
>> +		/* No match */
>> +		return 0;
>> +	}
>> +
>> +	if (res == DISCARD)
>> +		return 0;
>> +	else if (res == BYPASS) {
>> +		*sa_idx = 0;
>> +		return 1;
>> +	}
>> +
>> +	*sa_idx = SPI2IDX(res);
>> +	if (*sa_idx < IPSEC_SA_MAX_ENTRIES)
>> +		return 1;
>> +
>> +	/* Invalid SA IDX */
>> +	return 0;
>> +}
>> +
>> +static inline uint16_t
>> +route4_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
>> +{
>> +	uint32_t dst_ip;
>> +	uint16_t offset;
>> +	uint32_t hop;
>> +	int ret;
>> +
>> +	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip, ip_dst);
>> +	dst_ip = *rte_pktmbuf_mtod_offset(pkt, uint32_t *, offset);
>> +	dst_ip = rte_be_to_cpu_32(dst_ip);
>> +
>> +	ret = rte_lpm_lookup((struct rte_lpm *)rt_ctx, dst_ip, &hop);
>> +
>> +	if (ret == 0) {
>> +		/* We have a hit */
>> +		return hop;
>> +	}
>> +
>> +	/* else */
>> +	return RTE_MAX_ETHPORTS;
>> +}
>> +
>> +/* TODO: To be tested */
>> +static inline uint16_t
>> +route6_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
>> +{
>> +	uint8_t dst_ip[16];
>> +	uint8_t *ip6_dst;
>> +	uint16_t offset;
>> +	uint32_t hop;
>> +	int ret;
>> +
>> +	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip6_hdr, ip6_dst);
>> +	ip6_dst = rte_pktmbuf_mtod_offset(pkt, uint8_t *, offset);
>> +	memcpy(&dst_ip[0], ip6_dst, 16);
>> +
>> +	ret = rte_lpm6_lookup((struct rte_lpm6 *)rt_ctx, dst_ip, &hop);
>> +
>> +	if (ret == 0) {
>> +		/* We have a hit */
>> +		return hop;
>> +	}
>> +
>> +	/* else */
>> +	return RTE_MAX_ETHPORTS;
>> +}
>> +
>> +static inline uint16_t
>> +get_route(struct rte_mbuf *pkt, struct route_table *rt, enum pkt_type type)
>> +{
>> +	if (type == PKT_TYPE_PLAIN_IPV4 || type == PKT_TYPE_IPSEC_IPV4)
>> +		return route4_pkt(pkt, rt->rt4_ctx);
>> +	else if (type == PKT_TYPE_PLAIN_IPV6 || type == PKT_TYPE_IPSEC_IPV6)
>> +		return route6_pkt(pkt, rt->rt6_ctx);
>> +
>> +	return RTE_MAX_ETHPORTS;
>> +}
>> +
>> +static inline int
>> +process_ipsec_ev_inbound(struct ipsec_ctx *ctx, struct route_table *rt,
>> +		struct rte_event *ev)
>> +{
>> +	struct ipsec_sa *sa = NULL;
>> +	struct rte_mbuf *pkt;
>> +	uint16_t port_id = 0;
>> +	enum pkt_type type;
>> +	uint32_t sa_idx;
>> +	uint8_t *nlp;
>> +
>> +	/* Get pkt from event */
>> +	pkt = ev->mbuf;
>> +
>> +	/* Check the packet type */
>> +	type = process_ipsec_get_pkt_type(pkt, &nlp);
>> +
>> +	switch (type) {
>> +	case PKT_TYPE_PLAIN_IPV4:
>> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
>> +			sa = (struct ipsec_sa *) pkt->udata64;
>> +
>> +		/* Check if we have a match */
>> +		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
>> +			/* No valid match */
>> +			goto drop_pkt_and_exit;
>> +		}
>> +		break;
>> +
>> +	case PKT_TYPE_PLAIN_IPV6:
>> +		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD)
>> +			sa = (struct ipsec_sa *) pkt->udata64;
>> +
>> +		/* Check if we have a match */
>> +		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
>> +			/* No valid match */
>> +			goto drop_pkt_and_exit;
>> +		}
>> +		break;
>> +
>> +	default:
>> +		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
>> +		goto drop_pkt_and_exit;
>> +	}
>> +
>> +	/* Check if the packet has to be bypassed */
>> +	if (sa_idx == 0)
>> +		goto route_and_send_pkt;
>> +
>> +	/* Else the packet has to be protected with SA */
>> +
>> +	/* If the packet was IPsec processed, then SA pointer should be set */
>> +	if (sa == NULL)
>> +		goto drop_pkt_and_exit;
>> +
>> +	/* SPI on the packet should match with the one in SA */
>> +	if (unlikely(sa->spi != sa_idx))
>> +		goto drop_pkt_and_exit;
>> +
>> +route_and_send_pkt:
>> +	port_id = get_route(pkt, rt, type);
>> +	if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
>> +		/* no match */
>> +		goto drop_pkt_and_exit;
>> +	}
>> +	/* else, we have a matching route */
>> +
>> +	/* Update mac addresses */
>> +	update_mac_addrs(pkt, port_id);
>> +
>> +	/* Update the event with the dest port */
>> +	ipsec_event_pre_forward(pkt, port_id);
>> +	return 1;
>> +
>> +drop_pkt_and_exit:
>> +	RTE_LOG(ERR, IPSEC, "Inbound packet dropped\n");
>> +	rte_pktmbuf_free(pkt);
>> +	ev->mbuf = NULL;
>> +	return 0;
>> +}
>> +
>>  /*
>>   * Event mode exposes various operating modes depending on the
>>   * capabilities of the event device and the operating mode
>> @@ -134,11 +345,11 @@ static void
>>  ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>>  		uint8_t nb_links)
>>  {
>> +	struct lcore_conf_ev_tx_int_port_wrkr lconf;
>>  	unsigned int nb_rx = 0;
>> -	unsigned int port_id;
>> -	struct rte_mbuf *pkt;
>>  	struct rte_event ev;
>>  	uint32_t lcore_id;
>> +	int32_t socket_id;
>>
>>  	/* Check if we have links registered for this lcore */
>>  	if (nb_links == 0) {
>> @@ -151,6 +362,21 @@ ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>>  	/* Get core ID */
>>  	lcore_id = rte_lcore_id();
>>
>> +	/* Get socket ID */
>> +	socket_id = rte_lcore_to_socket_id(lcore_id);
>> +
>> +	/* Save routing table */
>> +	lconf.rt.rt4_ctx = socket_ctx[socket_id].rt_ip4;
>> +	lconf.rt.rt6_ctx = socket_ctx[socket_id].rt_ip6;
>> +	lconf.inbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_in;
>> +	lconf.inbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_in;
>> +	lconf.inbound.sa_ctx = socket_ctx[socket_id].sa_in;
>> +	lconf.inbound.session_pool = socket_ctx[socket_id].session_pool;
>> +	lconf.outbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_out;
>> +	lconf.outbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_out;
>> +	lconf.outbound.sa_ctx = socket_ctx[socket_id].sa_out;
>> +	lconf.outbound.session_pool = socket_ctx[socket_id].session_pool;
>> +
>>  	RTE_LOG(INFO, IPSEC,
>>  		"Launching event mode worker (non-burst - Tx internal port - "
>>  		"app mode - inbound) on lcore %d\n", lcore_id);
>> @@ -175,13 +401,11 @@ ipsec_wrkr_non_burst_int_port_app_mode_inb(struct eh_event_link_info *links,
>>  		if (nb_rx == 0)
>>  			continue;
>>
>> -		port_id = ev.queue_id;
>> -		pkt = ev.mbuf;
>> -
>> -		rte_prefetch0(rte_pktmbuf_mtod(pkt, void *));
>> -
>> -		/* Process packet */
>> -		ipsec_event_pre_forward(pkt, port_id);
>> +		if (process_ipsec_ev_inbound(&lconf.inbound,
>> +				&lconf.rt, &ev) != 1) {
>> +			/* The pkt has been dropped */
>> +			continue;
>> +		}
>>
>>  		/*
>>  		 * Since tx internal port is available, events can be
>> diff --git a/examples/ipsec-secgw/ipsec_worker.h b/examples/ipsec-secgw/ipsec_worker.h
>> new file mode 100644
>> index 0000000..fd18a2e
>> --- /dev/null
>> +++ b/examples/ipsec-secgw/ipsec_worker.h
>> @@ -0,0 +1,39 @@
>> +/* SPDX-License-Identifier: BSD-3-Clause
>> + * Copyright(c) 2018 Cavium, Inc
>> + */
>> +#ifndef _IPSEC_WORKER_H_
>> +#define _IPSEC_WORKER_H_
>> +
>> +#include "ipsec.h"
>> +
>> +enum pkt_type {
>> +	PKT_TYPE_PLAIN_IPV4 = 1,
>> +	PKT_TYPE_IPSEC_IPV4,
>> +	PKT_TYPE_PLAIN_IPV6,
>> +	PKT_TYPE_IPSEC_IPV6,
>> +	PKT_TYPE_INVALID
>> +};
>> +
>> +struct route_table {
>> +	struct rt_ctx *rt4_ctx;
>> +	struct rt_ctx *rt6_ctx;
>> +};
>> +
>> +/*
>> + * Conf required by event mode worker with tx internal port
>> + */
>> +struct lcore_conf_ev_tx_int_port_wrkr {
>> +	struct ipsec_ctx inbound;
>> +	struct ipsec_ctx outbound;
>> +	struct route_table rt;
>> +} __rte_cache_aligned;
>> +
>> +/* TODO
>> + *
>> + * Move this function to ipsec_worker.c
>> + */
>> +void ipsec_poll_mode_worker(void);
>> +
>> +int ipsec_launch_one_lcore(void *args);
>> +
>> +#endif /* _IPSEC_WORKER_H_ */
>> diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
>> index 7f046e3..9e17ba0 100644
>> --- a/examples/ipsec-secgw/sa.c
>> +++ b/examples/ipsec-secgw/sa.c
>> @@ -772,17 +772,6 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
>>  	printf("\n");
>>  }
>>
>> -struct sa_ctx {
>> -	void *satbl; /* pointer to array of rte_ipsec_sa objects*/
>> -	struct ipsec_sa sa[IPSEC_SA_MAX_ENTRIES];
>> -	union {
>> -		struct {
>> -			struct rte_crypto_sym_xform a;
>> -			struct rte_crypto_sym_xform b;
>> -		};
>> -	} xf[IPSEC_SA_MAX_ENTRIES];
>> -};
>> -
>>  static struct sa_ctx *
>>  sa_create(const char *name, int32_t socket_id)
>>  {
>> --
>> 2.7.4
>