From 1bdc587a2521d22f958a761bfafa227923a1f7b3 Mon Sep 17 00:00:00 2001 From: Jiawen Wu Date: Fri, 18 Dec 2020 17:36:37 +0800 Subject: [PATCH] net/txgbe: parse syn filter Check if the rule is a TCP SYN rule, and get the SYN info. Signed-off-by: Jiawen Wu --- drivers/net/txgbe/txgbe_flow.c | 263 +++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) diff --git a/drivers/net/txgbe/txgbe_flow.c b/drivers/net/txgbe/txgbe_flow.c index 96ff0546fb..174c9da6ea 100644 --- a/drivers/net/txgbe/txgbe_flow.c +++ b/drivers/net/txgbe/txgbe_flow.c @@ -765,6 +765,262 @@ txgbe_parse_ethertype_filter(struct rte_eth_dev *dev, return 0; } +/** + * Parse the rule to see if it is a TCP SYN rule. + * And get the TCP SYN filter info BTW. + * pattern: + * The first not void item must be ETH. + * The second not void item must be IPV4 or IPV6. + * The third not void item must be TCP. + * The next not void item must be END. + * action: + * The first not void action should be QUEUE. + * The next not void action should be END. + * pattern example: + * ITEM Spec Mask + * ETH NULL NULL + * IPV4/IPV6 NULL NULL + * TCP tcp_flags 0x02 0xFF + * END + * other members in mask and spec should set to 0x00. + * item->last should be NULL. + */ +static int +cons_parse_syn_filter(const struct rte_flow_attr *attr, + const struct rte_flow_item pattern[], + const struct rte_flow_action actions[], + struct rte_eth_syn_filter *filter, + struct rte_flow_error *error) +{ + const struct rte_flow_item *item; + const struct rte_flow_action *act; + const struct rte_flow_item_tcp *tcp_spec; + const struct rte_flow_item_tcp *tcp_mask; + const struct rte_flow_action_queue *act_q; + + if (!pattern) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM_NUM, + NULL, "NULL pattern."); + return -rte_errno; + } + + if (!actions) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ACTION_NUM, + NULL, "NULL action."); + return -rte_errno; + } + + if (!attr) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR, + NULL, "NULL attribute."); + return -rte_errno; + } + + + /* the first not void item should be MAC or IPv4 or IPv6 or TCP */ + item = next_no_void_pattern(pattern, NULL); + if (item->type != RTE_FLOW_ITEM_TYPE_ETH && + item->type != RTE_FLOW_ITEM_TYPE_IPV4 && + item->type != RTE_FLOW_ITEM_TYPE_IPV6 && + item->type != RTE_FLOW_ITEM_TYPE_TCP) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by syn filter"); + return -rte_errno; + } + /*Not supported last point for range*/ + if (item->last) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + item, "Not supported last point for range"); + return -rte_errno; + } + + /* Skip Ethernet */ + if (item->type == RTE_FLOW_ITEM_TYPE_ETH) { + /* if the item is MAC, the content should be NULL */ + if (item->spec || item->mask) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Invalid SYN address mask"); + return -rte_errno; + } + + /* check if the next not void item is IPv4 or IPv6 */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_IPV4 && + item->type != RTE_FLOW_ITEM_TYPE_IPV6) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by syn filter"); + return -rte_errno; + } + } + + /* Skip IP */ + if (item->type == RTE_FLOW_ITEM_TYPE_IPV4 || + item->type == RTE_FLOW_ITEM_TYPE_IPV6) { + /* if the item is IP, the content should be NULL */ + if (item->spec || item->mask) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Invalid SYN mask"); + return -rte_errno; + } + + /* check if the next not void item is TCP */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_TCP) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by syn filter"); + return -rte_errno; + } + } + + /* Get the TCP info. Only support SYN. */ + if (!item->spec || !item->mask) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Invalid SYN mask"); + return -rte_errno; + } + /*Not supported last point for range*/ + if (item->last) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + item, "Not supported last point for range"); + return -rte_errno; + } + + tcp_spec = item->spec; + tcp_mask = item->mask; + if (!(tcp_spec->hdr.tcp_flags & RTE_TCP_SYN_FLAG) || + tcp_mask->hdr.src_port || + tcp_mask->hdr.dst_port || + tcp_mask->hdr.sent_seq || + tcp_mask->hdr.recv_ack || + tcp_mask->hdr.data_off || + tcp_mask->hdr.tcp_flags != RTE_TCP_SYN_FLAG || + tcp_mask->hdr.rx_win || + tcp_mask->hdr.cksum || + tcp_mask->hdr.tcp_urp) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by syn filter"); + return -rte_errno; + } + + /* check if the next not void item is END */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_END) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by syn filter"); + return -rte_errno; + } + + /* check if the first not void action is QUEUE. */ + act = next_no_void_action(actions, NULL); + if (act->type != RTE_FLOW_ACTION_TYPE_QUEUE) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ACTION, + act, "Not supported action."); + return -rte_errno; + } + + act_q = (const struct rte_flow_action_queue *)act->conf; + filter->queue = act_q->index; + if (filter->queue >= TXGBE_MAX_RX_QUEUE_NUM) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ACTION, + act, "Not supported action."); + return -rte_errno; + } + + /* check if the next not void item is END */ + act = next_no_void_action(actions, act); + if (act->type != RTE_FLOW_ACTION_TYPE_END) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ACTION, + act, "Not supported action."); + return -rte_errno; + } + + /* parse attr */ + /* must be input direction */ + if (!attr->ingress) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, + attr, "Only support ingress."); + return -rte_errno; + } + + /* not supported */ + if (attr->egress) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, + attr, "Not support egress."); + return -rte_errno; + } + + /* not supported */ + if (attr->transfer) { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER, + attr, "No support for transfer."); + return -rte_errno; + } + + /* Support 2 priorities, the lowest or highest. */ + if (!attr->priority) { + filter->hig_pri = 0; + } else if (attr->priority == (uint32_t)~0U) { + filter->hig_pri = 1; + } else { + memset(filter, 0, sizeof(struct rte_eth_syn_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, + attr, "Not support priority."); + return -rte_errno; + } + + return 0; +} + +static int +txgbe_parse_syn_filter(struct rte_eth_dev *dev, + const struct rte_flow_attr *attr, + const struct rte_flow_item pattern[], + const struct rte_flow_action actions[], + struct rte_eth_syn_filter *filter, + struct rte_flow_error *error) +{ + int ret; + + ret = cons_parse_syn_filter(attr, pattern, + actions, filter, error); + + if (filter->queue >= dev->data->nb_rx_queues) + return -rte_errno; + + if (ret) + return ret; + + return 0; +} + /** * Create or destroy a flow rule. * Theorically one rule can match more than one filters. @@ -796,6 +1052,7 @@ txgbe_flow_validate(struct rte_eth_dev *dev, { struct rte_eth_ntuple_filter ntuple_filter; struct rte_eth_ethertype_filter ethertype_filter; + struct rte_eth_syn_filter syn_filter; int ret = 0; memset(&ntuple_filter, 0, sizeof(struct rte_eth_ntuple_filter)); @@ -810,6 +1067,12 @@ txgbe_flow_validate(struct rte_eth_dev *dev, if (!ret) return 0; + memset(&syn_filter, 0, sizeof(struct rte_eth_syn_filter)); + ret = txgbe_parse_syn_filter(dev, attr, pattern, + actions, &syn_filter, error); + if (!ret) + return 0; + return ret; } -- 2.20.1