Hi Kumara,
Please see replies inline.
In addition, you need to update the programmer guide in
generic_receive_offload_lib.rst,
and release note release_23_07.rst.
Thanks,
Jiayu
> -----Original Message-----
> From: Kumara Parameshwaran <kumaraparames...@gmail.com>
> Sent: Tuesday, June 6, 2023 10:58 PM
> To: Hu, Jiayu <jiayu...@intel.com>
> Cc: dev@dpdk.org; Kumara Parameshwaran
> <kumaraparames...@gmail.com>
> Subject: [PATCH v4] gro : ipv6 changes to support GRO for TCP/ipv6
>
> The patch adds GRO support for TCP/ipv6 packets. This does not include the
> support for vxlan, udp ipv6 packets.
>
> Signed-off-by: Kumara Parameshwaran <kumaraparames...@gmail.com>>
> diff --git a/lib/gro/gro_tcp.c b/lib/gro/gro_tcp.c new file mode 100644 index
> 0000000000..02a7d0f8c5
> --- /dev/null
> +++ b/lib/gro/gro_tcp.c
For gro_tcp.c and gro_tcp.h, it's better to add "_internal" in the file name.
> @@ -0,0 +1,128 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2017 Intel Corporation
> + */
> +#include <rte_malloc.h>
> +#include <rte_mbuf.h>
> +#include <rte_ethdev.h>
> +
> +#include "gro_tcp.h"
> +
> +static inline uint32_t
> +find_an_empty_item(struct gro_tcp_item *items,
> + uint32_t max_item_num)
> +{
> + uint32_t i;
> +
> + for (i = 0; i < max_item_num; i++)
> + if (items[i].firstseg == NULL)
> + return i;
> + return INVALID_ARRAY_INDEX;
> +}
> +
> +uint32_t
> +insert_new_tcp_item(struct rte_mbuf *pkt,
> + struct gro_tcp_item *items,
> + uint32_t *item_num,
> + uint32_t max_item_num,
> + uint64_t start_time,
> + uint32_t prev_idx,
> + uint32_t sent_seq,
> + uint16_t ip_id,
> + uint8_t is_atomic)
This function can be inline.
> +{
> + uint32_t item_idx;
> +
> + item_idx = find_an_empty_item(items, max_item_num);
> + if (item_idx == INVALID_ARRAY_INDEX)
> + return INVALID_ARRAY_INDEX;
> +
> + items[item_idx].firstseg = pkt;
> + items[item_idx].lastseg = rte_pktmbuf_lastseg(pkt);
> + items[item_idx].start_time = start_time;
> + items[item_idx].next_pkt_idx = INVALID_ARRAY_INDEX;
> + items[item_idx].sent_seq = sent_seq;
> + items[item_idx].ip_id = ip_id;
> + items[item_idx].nb_merged = 1;
> + items[item_idx].is_atomic = is_atomic;
> + (*item_num) += 1;
> +
> + /* if the previous packet exists, chain them together. */
> + if (prev_idx != INVALID_ARRAY_INDEX) {
> + items[item_idx].next_pkt_idx =
> + items[prev_idx].next_pkt_idx;
> + items[prev_idx].next_pkt_idx = item_idx;
> + }
> +
> + return item_idx;
> +}
> +
> +uint32_t
> +delete_tcp_item(struct gro_tcp_item *items, uint32_t item_idx,
> + uint32_t *item_num,
> + uint32_t prev_item_idx)
> +{
> + uint32_t next_idx = items[item_idx].next_pkt_idx;
> +
> + /* NULL indicates an empty item */
> + items[item_idx].firstseg = NULL;
> + (*item_num) -= 1;
> + if (prev_item_idx != INVALID_ARRAY_INDEX)
> + items[prev_item_idx].next_pkt_idx = next_idx;
> +
> + return next_idx;
> +}
This function can be inline.
> +
> +int32_t
> +gro_process_tcp_item(struct rte_mbuf *pkt,
> + struct rte_tcp_hdr *tcp_hdr,
> + int32_t tcp_dl,
> + struct gro_tcp_item *items,
> + uint32_t item_idx,
> + uint32_t *item_num,
> + uint32_t max_item_num,
> + uint16_t ip_id,
> + uint8_t is_atomic,
> + uint64_t start_time)
It is for internal use, so it's better to remove "gro_" from the function name.
> +{
> + uint32_t cur_idx;
> + uint32_t prev_idx;
> + int cmp;
> + uint32_t sent_seq;
> +
> + sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
> + /*
> + * Check all packets in the flow and try to find a neighbor for
> + * the input packet.
> + */
> + cur_idx = item_idx;
> + prev_idx = cur_idx;
> + do {
> + cmp = check_seq_option(&items[cur_idx], tcp_hdr,
> + sent_seq, ip_id, pkt->l4_len, tcp_dl, 0,
> + is_atomic);
> + if (cmp) {
> + if (merge_two_tcp_packets(&items[cur_idx],
> + pkt, cmp, sent_seq, ip_id, 0))
> + return 1;
> + /*
> + * Fail to merge the two packets, as the packet
> + * length is greater than the max value. Store
> + * the packet into the flow.
> + */
> + if (insert_new_tcp_item(pkt, items, item_num,
> max_item_num, start_time, cur_idx,
> + sent_seq, ip_id, is_atomic) ==
> + INVALID_ARRAY_INDEX)
> + return -1;
> + return 0;
> + }
> + prev_idx = cur_idx;
> + cur_idx = items[cur_idx].next_pkt_idx;
> + } while (cur_idx != INVALID_ARRAY_INDEX);
> +
> + /* Fail to find a neighbor, so store the packet into the flow. */
> + if (insert_new_tcp_item(pkt, items, item_num, max_item_num,
> start_time, prev_idx, sent_seq,
> + ip_id, is_atomic) == INVALID_ARRAY_INDEX)
> + return -1;
> +
> + return 0;
> +}
> diff --git a/lib/gro/gro_tcp.h b/lib/gro/gro_tcp.h new file mode 100644 index
> 0000000000..4b5b4eda9c
> --- /dev/null
> +++ b/lib/gro/gro_tcp.h
> @@ -0,0 +1,209 @@
> +#ifndef _GRO_TCP_H_
> +#define _GRO_TCP_H_
> +
> +#define INVALID_ARRAY_INDEX 0xffffffffUL
> +
> +#include <rte_tcp.h>
> +
> +/*
> + * The max length of a IPv4 packet, which includes the length of the L3
> + * header, the L4 header and the data payload.
> + */
> +#define MAX_IP_PKT_LENGTH UINT16_MAX
> +
> +/* The maximum TCP header length */
> +#define MAX_TCP_HLEN 60
> +#define INVALID_TCP_HDRLEN(len) \
> + (((len) < sizeof(struct rte_tcp_hdr)) || ((len) > MAX_TCP_HLEN))
> +
> +struct gro_tcp_flow {
This structure name is confusing. In the upper layer, tcp4 and tcp6 have
gro_tcp4_flow
and gro_tcp6_flow, which represent a flow. Inside gro_tcp4/6_flow, there are
keys,
represented by struct tcp4/6_flow_key. But inside struct tcp4/6_flow_key, there
is
struct gro_tcp_flow. Need to rename struct gro_tcp_flow, like
common_tcp_flow_key.
> + struct rte_ether_addr eth_saddr;
> + struct rte_ether_addr eth_daddr;
> + uint32_t recv_ack;
> + uint16_t src_port;
> + uint16_t dst_port;
> +};
> +
> +#define ASSIGN_TCP_FLOW_KEY(k1, k2) \
Ditto. The macro needs rename, like ASSIGN_COMMON_TCP_FLOW_KEY.
> + do {\
> + rte_ether_addr_copy(&(k1->eth_saddr), &(k2->eth_saddr)); \
> + rte_ether_addr_copy(&(k1->eth_daddr), &(k2->eth_daddr));
> \
> + k2->recv_ack = k1->recv_ack; \
> + k2->src_port = k1->src_port; \
> + k2->dst_port = k1->dst_port; \
> + } while (0)
> +
> +struct gro_tcp_item {
> + /*
> + * The first MBUF segment of the packet. If the value
> + * is NULL, it means the item is empty.
> + */
> + struct rte_mbuf *firstseg;
> + /* The last MBUF segment of the packet */
> + struct rte_mbuf *lastseg;
> + /*
> + * The time when the first packet is inserted into the table.
> + * This value won't be updated, even if the packet is merged
> + * with other packets.
> + */
> + uint64_t start_time;
> + /*
> + * next_pkt_idx is used to chain the packets that
> + * are in the same flow but can't be merged together
> + * (e.g. caused by packet reordering).
> + */
> + uint32_t next_pkt_idx;
> + /* TCP sequence number of the packet */
> + uint32_t sent_seq;
> + /* IPv4 ID of the packet */
> + uint16_t ip_id;
The ip_id field is not used by tcp6. It's better to use an union to include
ip_id for IPv4 and
an useless member for IPv6 with some comments to avoid confusing.
> + /* the number of merged packets */
> + uint16_t nb_merged;
> + /* Indicate if IPv4 ID can be ignored */
> + uint8_t is_atomic;
> +};
> +
> +uint32_t
> +insert_new_tcp_item(struct rte_mbuf *pkt,
> + struct gro_tcp_item *items,
> + uint32_t *item_num,
> + uint32_t table_size,
> + uint64_t start_time,
> + uint32_t prev_idx,
> + uint32_t sent_seq,
> + uint16_t ip_id,
> + uint8_t is_atomic);
> +
> +uint32_t
> +delete_tcp_item(struct gro_tcp_item *items,
> + uint32_t item_idx,
> + uint32_t *item_num,
> + uint32_t prev_item_idx);
> +
> +int32_t
> +gro_process_tcp_item(struct rte_mbuf *pkt,
> + struct rte_tcp_hdr *tcp_hdr,
> + int32_t tcp_dl,
> + struct gro_tcp_item *items,
> + uint32_t item_idx,
> + uint32_t *item_num,
> + uint32_t table_size,
> + uint16_t ip_id,
> + uint8_t is_atomic,
> + uint64_t start_time);
> +
> +/*
> + * Merge two TCP packets without updating checksums.
> + * If cmp is larger than 0, append the new packet to the
> + * original packet. Otherwise, pre-pend the new packet to
> + * the original packet.
> + */
> +static inline int
> +merge_two_tcp_packets(struct gro_tcp_item *item,
> + struct rte_mbuf *pkt,
> + int cmp,
> + uint32_t sent_seq,
> + uint16_t ip_id,
> + uint16_t l2_offset)
> +{
> + struct rte_mbuf *pkt_head, *pkt_tail, *lastseg;
> + uint16_t hdr_len, l2_len;
> +
> + if (cmp > 0) {
> + pkt_head = item->firstseg;
> + pkt_tail = pkt;
> + } else {
> + pkt_head = pkt;
> + pkt_tail = item->firstseg;
> + }
> +
> + /* check if the IPv4 packet length is greater than the max value */
> + hdr_len = l2_offset + pkt_head->l2_len + pkt_head->l3_len +
> + pkt_head->l4_len;
> + l2_len = l2_offset > 0 ? pkt_head->outer_l2_len : pkt_head->l2_len;
> + if (unlikely(pkt_head->pkt_len - l2_len + pkt_tail->pkt_len -
> + hdr_len > MAX_IP_PKT_LENGTH))
> + return 0;
> +
> + /* remove the packet header for the tail packet */
> + rte_pktmbuf_adj(pkt_tail, hdr_len);
> +
> + /* chain two packets together */
> + if (cmp > 0) {
> + item->lastseg->next = pkt;
> + item->lastseg = rte_pktmbuf_lastseg(pkt);
> + /* update IP ID to the larger value */
> + item->ip_id = ip_id;
> + } else {
> + lastseg = rte_pktmbuf_lastseg(pkt);
> + lastseg->next = item->firstseg;
> + item->firstseg = pkt;
> + /* update sent_seq to the smaller value */
> + item->sent_seq = sent_seq;
> + item->ip_id = ip_id;
> + }
> + item->nb_merged++;
> +
> + /* update MBUF metadata for the merged packet */
> + pkt_head->nb_segs += pkt_tail->nb_segs;
> + pkt_head->pkt_len += pkt_tail->pkt_len;
> +
> + return 1;
> +}
> +
> +/*
> + * Check if two TCP/IPv4 packets are neighbors.
> + */
> +static inline int
> +check_seq_option(struct gro_tcp_item *item,
> + struct rte_tcp_hdr *tcph,
> + uint32_t sent_seq,
> + uint16_t ip_id,
> + uint16_t tcp_hl,
> + uint16_t tcp_dl,
> + uint16_t l2_offset,
> + uint8_t is_atomic)
> +{
> + struct rte_mbuf *pkt_orig = item->firstseg;
> + char *iph_orig;
> + struct rte_tcp_hdr *tcph_orig;
> + uint16_t len, tcp_hl_orig;
> +
> + iph_orig = (char *)(rte_pktmbuf_mtod(pkt_orig, char *) +
> + l2_offset + pkt_orig->l2_len);
> + tcph_orig = (struct rte_tcp_hdr *)(iph_orig + pkt_orig->l3_len);
> + tcp_hl_orig = pkt_orig->l4_len;
> +
> + /* Check if TCP option fields equal */
> + len = RTE_MAX(tcp_hl, tcp_hl_orig) - sizeof(struct rte_tcp_hdr);
> + if ((tcp_hl != tcp_hl_orig) || ((len > 0) &&
> + (memcmp(tcph + 1, tcph_orig + 1,
> + len) != 0)))
> + return 0;
> +
> + /* Don't merge packets whose DF bits are different */
> + if (unlikely(item->is_atomic ^ is_atomic))
> + return 0;
> +
> + /* check if the two packets are neighbors */
> + len = pkt_orig->pkt_len - l2_offset - pkt_orig->l2_len -
> + pkt_orig->l3_len - tcp_hl_orig;
> + if ((sent_seq == item->sent_seq + len) && (is_atomic ||
> + (ip_id == item->ip_id + 1)))
> + /* append the new packet */
> + return 1;
> + else if ((sent_seq + tcp_dl == item->sent_seq) && (is_atomic ||
> + (ip_id + item->nb_merged == item->ip_id)))
> + /* pre-pend the new packet */
> + return -1;
> +
> + return 0;
> +}
> +
> +static inline int
> +is_same_tcp_flow(struct gro_tcp_flow *k1, struct gro_tcp_flow *k2) {
> + return (!memcmp(k1, k2, sizeof(struct gro_tcp_flow))); }
I think this function needs rename, as the result of this function cannot
identify if they are
same TCP flow.
> +
> +#endif
> diff --git a/lib/gro/gro_tcp4.c b/lib/gro/gro_tcp4.c index
> 0014096e63..ffc33747c4 100644
> --- a/lib/gro/gro_tcp4.c
> +++ b/lib/gro/gro_tcp4.c
> @@ -7,6 +7,7 @@
> #include <rte_ethdev.h>
>
> #include "gro_tcp4.h"
> +#include "gro_tcp.h"
>
> void *
> gro_tcp4_tbl_create(uint16_t socket_id, @@ -30,7 +31,7 @@
> gro_tcp4_tbl_create(uint16_t socket_id,
> if (tbl == NULL)
> return NULL;
>
> - size = sizeof(struct gro_tcp4_item) * entries_num;
> + size = sizeof(struct gro_tcp_item) * entries_num;
> tbl->items = rte_zmalloc_socket(__func__,
> size,
> RTE_CACHE_LINE_SIZE,
> @@ -71,18 +72,6 @@ gro_tcp4_tbl_destroy(void *tbl)
> rte_free(tcp_tbl);
> }
>
> -static inline uint32_t
> -find_an_empty_item(struct gro_tcp4_tbl *tbl) -{
> - uint32_t i;
> - uint32_t max_item_num = tbl->max_item_num;
> -
> - for (i = 0; i < max_item_num; i++)
> - if (tbl->items[i].firstseg == NULL)
> - return i;
> - return INVALID_ARRAY_INDEX;
> -}
> -
> static inline uint32_t
> find_an_empty_flow(struct gro_tcp4_tbl *tbl) { @@ -95,56 +84,6 @@
> find_an_empty_flow(struct gro_tcp4_tbl *tbl)
> return INVALID_ARRAY_INDEX;
> }
>
> -static inline uint32_t
> -insert_new_item(struct gro_tcp4_tbl *tbl,
> - struct rte_mbuf *pkt,
> - uint64_t start_time,
> - uint32_t prev_idx,
> - uint32_t sent_seq,
> - uint16_t ip_id,
> - uint8_t is_atomic)
> -{
> - uint32_t item_idx;
> -
> - item_idx = find_an_empty_item(tbl);
> - if (item_idx == INVALID_ARRAY_INDEX)
> - return INVALID_ARRAY_INDEX;
> -
> - tbl->items[item_idx].firstseg = pkt;
> - tbl->items[item_idx].lastseg = rte_pktmbuf_lastseg(pkt);
> - tbl->items[item_idx].start_time = start_time;
> - tbl->items[item_idx].next_pkt_idx = INVALID_ARRAY_INDEX;
> - tbl->items[item_idx].sent_seq = sent_seq;
> - tbl->items[item_idx].ip_id = ip_id;
> - tbl->items[item_idx].nb_merged = 1;
> - tbl->items[item_idx].is_atomic = is_atomic;
> - tbl->item_num++;
> -
> - /* if the previous packet exists, chain them together. */
> - if (prev_idx != INVALID_ARRAY_INDEX) {
> - tbl->items[item_idx].next_pkt_idx =
> - tbl->items[prev_idx].next_pkt_idx;
> - tbl->items[prev_idx].next_pkt_idx = item_idx;
> - }
> -
> - return item_idx;
> -}
> -
> -static inline uint32_t
> -delete_item(struct gro_tcp4_tbl *tbl, uint32_t item_idx,
> - uint32_t prev_item_idx)
> -{
> - uint32_t next_idx = tbl->items[item_idx].next_pkt_idx;
> -
> - /* NULL indicates an empty item */
> - tbl->items[item_idx].firstseg = NULL;
> - tbl->item_num--;
> - if (prev_item_idx != INVALID_ARRAY_INDEX)
> - tbl->items[prev_item_idx].next_pkt_idx = next_idx;
> -
> - return next_idx;
> -}
> -
> static inline uint32_t
> insert_new_flow(struct gro_tcp4_tbl *tbl,
> struct tcp4_flow_key *src,
> @@ -159,13 +98,10 @@ insert_new_flow(struct gro_tcp4_tbl *tbl,
>
> dst = &(tbl->flows[flow_idx].key);
>
> - rte_ether_addr_copy(&(src->eth_saddr), &(dst->eth_saddr));
> - rte_ether_addr_copy(&(src->eth_daddr), &(dst->eth_daddr));
> + ASSIGN_TCP_FLOW_KEY((&src->tcp_flow), (&dst->tcp_flow));
> +
> dst->ip_src_addr = src->ip_src_addr;
> dst->ip_dst_addr = src->ip_dst_addr;
> - dst->recv_ack = src->recv_ack;
> - dst->src_port = src->src_port;
> - dst->dst_port = src->dst_port;
>
> tbl->flows[flow_idx].start_index = item_idx;
> tbl->flow_num++;
> @@ -173,21 +109,6 @@ insert_new_flow(struct gro_tcp4_tbl *tbl,
> return flow_idx;
> }
>
> -/*
> - * update the packet length for the flushed packet.
> - */
> -static inline void
> -update_header(struct gro_tcp4_item *item) -{
> - struct rte_ipv4_hdr *ipv4_hdr;
> - struct rte_mbuf *pkt = item->firstseg;
> -
> - ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
> - pkt->l2_len);
> - ipv4_hdr->total_length = rte_cpu_to_be_16(pkt->pkt_len -
> - pkt->l2_len);
> -}
> -
> int32_t
> gro_tcp4_reassemble(struct rte_mbuf *pkt,
> struct gro_tcp4_tbl *tbl,
> @@ -195,16 +116,15 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt, {
> struct rte_ether_hdr *eth_hdr;
> struct rte_ipv4_hdr *ipv4_hdr;
> - struct rte_tcp_hdr *tcp_hdr;
> - uint32_t sent_seq;
> int32_t tcp_dl;
> + struct rte_tcp_hdr *tcp_hdr;
> uint16_t ip_id, hdr_len, frag_off, ip_tlen;
> uint8_t is_atomic;
> + uint32_t sent_seq;
No need to change tcp_hdr and sent_seq here.
>
> struct tcp4_flow_key key;
> - uint32_t cur_idx, prev_idx, item_idx;
> + uint32_t item_idx;
> uint32_t i, max_flow_num, remaining_flow_num;
> - int cmp;
> uint8_t find;
>
> /*
> @@ -216,7 +136,7 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
>
> eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
> ipv4_hdr = (struct rte_ipv4_hdr *)((char *)eth_hdr + pkt->l2_len);
> - tcp_hdr = (struct rte_tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
> + tcp_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_tcp_hdr *,
> +pkt->l2_len + pkt->l3_len);
> hdr_len = pkt->l2_len + pkt->l3_len + pkt->l4_len;
>
> /*
> @@ -230,7 +150,6 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
> ip_tlen = rte_be_to_cpu_16(ipv4_hdr->total_length);
> if (pkt->pkt_len > (uint32_t)(ip_tlen + pkt->l2_len))
> rte_pktmbuf_trim(pkt, pkt->pkt_len - ip_tlen - pkt->l2_len);
> -
> /*
> * Don't process the packet whose payload length is less than or
> * equal to 0.
> @@ -239,6 +158,13 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
> if (tcp_dl <= 0)
> return -1;
>
> + rte_ether_addr_copy(&(eth_hdr->src_addr),
> &(key.tcp_flow.eth_saddr));
> + rte_ether_addr_copy(&(eth_hdr->dst_addr),
> &(key.tcp_flow.eth_daddr));
> + key.ip_src_addr = ipv4_hdr->src_addr;
> + key.ip_dst_addr = ipv4_hdr->dst_addr;
> + key.tcp_flow.src_port = tcp_hdr->src_port;
> + key.tcp_flow.dst_port = tcp_hdr->dst_port;
> + key.tcp_flow.recv_ack = tcp_hdr->recv_ack;
> /*
> * Save IPv4 ID for the packet whose DF bit is 0. For the packet
> * whose DF bit is 1, IPv4 ID is ignored.
> @@ -246,15 +172,6 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
> frag_off = rte_be_to_cpu_16(ipv4_hdr->fragment_offset);
> is_atomic = (frag_off & RTE_IPV4_HDR_DF_FLAG) ==
> RTE_IPV4_HDR_DF_FLAG;
> ip_id = is_atomic ? 0 : rte_be_to_cpu_16(ipv4_hdr->packet_id);
> - sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
> -
> - rte_ether_addr_copy(&(eth_hdr->src_addr), &(key.eth_saddr));
> - rte_ether_addr_copy(&(eth_hdr->dst_addr), &(key.eth_daddr));
> - key.ip_src_addr = ipv4_hdr->src_addr;
> - key.ip_dst_addr = ipv4_hdr->dst_addr;
> - key.src_port = tcp_hdr->src_port;
> - key.dst_port = tcp_hdr->dst_port;
> - key.recv_ack = tcp_hdr->recv_ack;
>
> /* Search for a matched flow. */
> max_flow_num = tbl->max_flow_num;
> @@ -270,63 +187,44 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
> }
> }
>
> - /*
> - * Fail to find a matched flow. Insert a new flow and store the
> - * packet into the flow.
> - */
> if (find == 0) {
> - item_idx = insert_new_item(tbl, pkt, start_time,
> - INVALID_ARRAY_INDEX, sent_seq, ip_id,
> - is_atomic);
> + sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
> + item_idx = insert_new_tcp_item(pkt, tbl->items, &tbl-
> >item_num, tbl->max_item_num, start_time,
> + INVALID_ARRAY_INDEX,
> sent_seq, ip_id,
> + is_atomic);
> if (item_idx == INVALID_ARRAY_INDEX)
> return -1;
> if (insert_new_flow(tbl, &key, item_idx) ==
> - INVALID_ARRAY_INDEX) {
> + INVALID_ARRAY_INDEX) {
> /*
> * Fail to insert a new flow, so delete the
> * stored packet.
> - */
> - delete_item(tbl, item_idx, INVALID_ARRAY_INDEX);
> + */
> + delete_tcp_item(tbl->items, item_idx, &tbl-
> >item_num,
> +INVALID_ARRAY_INDEX);
> return -1;
> }
> return 0;
> }
> + item_idx = tbl->flows[i].start_index;
No need to update item_idx, and you can directly pass tbl->flows[i].start_index
to
gro_process_tcp_item(). And same in gro_tcp6_reassemble().
>
> - /*
> - * Check all packets in the flow and try to find a neighbor for
> - * the input packet.
> - */
> - cur_idx = tbl->flows[i].start_index;
> - prev_idx = cur_idx;
> - do {
> - cmp = check_seq_option(&(tbl->items[cur_idx]), tcp_hdr,
> - sent_seq, ip_id, pkt->l4_len, tcp_dl, 0,
> - is_atomic);
> - if (cmp) {
> - if (merge_two_tcp4_packets(&(tbl->items[cur_idx]),
> - pkt, cmp, sent_seq, ip_id, 0))
> - return 1;
> - /*
> - * Fail to merge the two packets, as the packet
> - * length is greater than the max value. Store
> - * the packet into the flow.
> - */
> - if (insert_new_item(tbl, pkt, start_time, cur_idx,
> - sent_seq, ip_id, is_atomic) ==
> - INVALID_ARRAY_INDEX)
> - return -1;
> - return 0;
> - }
> - prev_idx = cur_idx;
> - cur_idx = tbl->items[cur_idx].next_pkt_idx;
> - } while (cur_idx != INVALID_ARRAY_INDEX);
> + return gro_process_tcp_item(pkt, tcp_hdr, tcp_dl, tbl->items,
> item_idx,
> + &tbl->item_num, tbl-
> >max_item_num,
> + ip_id, is_atomic, start_time);
> +}
>
> - /* Fail to find a neighbor, so store the packet into the flow. */
> - if (insert_new_item(tbl, pkt, start_time, prev_idx, sent_seq,
> - ip_id, is_atomic) == INVALID_ARRAY_INDEX)
> - return -1;
