From: Jiawen Wu Date: Fri, 18 Dec 2020 09:36:33 +0000 (+0800) Subject: net/txgbe: parse n-tuple filter X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=b7eeecb17556;p=dpdk.git net/txgbe: parse n-tuple filter Check if the rule is a n-tuple rule, and get the n-tuple info. Signed-off-by: Jiawen Wu --- diff --git a/drivers/net/txgbe/txgbe_flow.c b/drivers/net/txgbe/txgbe_flow.c index d39ab6416b..f4802d2696 100644 --- a/drivers/net/txgbe/txgbe_flow.c +++ b/drivers/net/txgbe/txgbe_flow.c @@ -2,11 +2,528 @@ * Copyright(c) 2015-2020 */ +#include #include #include #include "txgbe_ethdev.h" +#define TXGBE_MIN_N_TUPLE_PRIO 1 +#define TXGBE_MAX_N_TUPLE_PRIO 7 + +/** + * Endless loop will never happen with below assumption + * 1. there is at least one no-void item(END) + * 2. cur is before END. + */ +static inline +const struct rte_flow_item *next_no_void_pattern( + const struct rte_flow_item pattern[], + const struct rte_flow_item *cur) +{ + const struct rte_flow_item *next = + cur ? cur + 1 : &pattern[0]; + while (1) { + if (next->type != RTE_FLOW_ITEM_TYPE_VOID) + return next; + next++; + } +} + +static inline +const struct rte_flow_action *next_no_void_action( + const struct rte_flow_action actions[], + const struct rte_flow_action *cur) +{ + const struct rte_flow_action *next = + cur ? cur + 1 : &actions[0]; + while (1) { + if (next->type != RTE_FLOW_ACTION_TYPE_VOID) + return next; + next++; + } +} + +/** + * Please aware there's an assumption for all the parsers. + * rte_flow_item is using big endian, rte_flow_attr and + * rte_flow_action are using CPU order. + * Because the pattern is used to describe the packets, + * normally the packets should use network order. + */ + +/** + * Parse the rule to see if it is a n-tuple rule. + * And get the n-tuple filter info BTW. + * pattern: + * The first not void item can be ETH or IPV4. + * The second not void item must be IPV4 if the first one is ETH. + * The third not void item must be UDP or 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 src_addr 192.168.1.20 0xFFFFFFFF + * dst_addr 192.167.3.50 0xFFFFFFFF + * next_proto_id 17 0xFF + * UDP/TCP/ src_port 80 0xFFFF + * SCTP dst_port 80 0xFFFF + * END + * other members in mask and spec should set to 0x00. + * item->last should be NULL. + */ +static int +cons_parse_ntuple_filter(const struct rte_flow_attr *attr, + const struct rte_flow_item pattern[], + const struct rte_flow_action actions[], + struct rte_eth_ntuple_filter *filter, + struct rte_flow_error *error) +{ + const struct rte_flow_item *item; + const struct rte_flow_action *act; + const struct rte_flow_item_ipv4 *ipv4_spec; + const struct rte_flow_item_ipv4 *ipv4_mask; + const struct rte_flow_item_tcp *tcp_spec; + const struct rte_flow_item_tcp *tcp_mask; + const struct rte_flow_item_udp *udp_spec; + const struct rte_flow_item_udp *udp_mask; + const struct rte_flow_item_sctp *sctp_spec; + const struct rte_flow_item_sctp *sctp_mask; + const struct rte_flow_item_eth *eth_spec; + const struct rte_flow_item_eth *eth_mask; + const struct rte_flow_item_vlan *vlan_spec; + const struct rte_flow_item_vlan *vlan_mask; + struct rte_flow_item_eth eth_null; + struct rte_flow_item_vlan vlan_null; + + 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; + } + + memset(ð_null, 0, sizeof(struct rte_flow_item_eth)); + memset(&vlan_null, 0, sizeof(struct rte_flow_item_vlan)); + + /* the first not void item can be MAC or IPv4 */ + item = next_no_void_pattern(pattern, NULL); + + if (item->type != RTE_FLOW_ITEM_TYPE_ETH && + item->type != RTE_FLOW_ITEM_TYPE_IPV4) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + /* Skip Ethernet */ + if (item->type == RTE_FLOW_ITEM_TYPE_ETH) { + eth_spec = item->spec; + eth_mask = item->mask; + /*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; + } + /* if the first item is MAC, the content should be NULL */ + if ((item->spec || item->mask) && + (memcmp(eth_spec, ð_null, + sizeof(struct rte_flow_item_eth)) || + memcmp(eth_mask, ð_null, + sizeof(struct rte_flow_item_eth)))) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + /* check if the next not void item is IPv4 or Vlan */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_IPV4 && + item->type != RTE_FLOW_ITEM_TYPE_VLAN) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + } + + if (item->type == RTE_FLOW_ITEM_TYPE_VLAN) { + vlan_spec = item->spec; + vlan_mask = item->mask; + /*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; + } + /* the content should be NULL */ + if ((item->spec || item->mask) && + (memcmp(vlan_spec, &vlan_null, + sizeof(struct rte_flow_item_vlan)) || + memcmp(vlan_mask, &vlan_null, + sizeof(struct rte_flow_item_vlan)))) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + /* check if the next not void item is IPv4 */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_IPV4) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + } + + if (item->mask) { + /* get the IPv4 info */ + if (!item->spec || !item->mask) { + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Invalid ntuple 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; + } + + ipv4_mask = item->mask; + /** + * Only support src & dst addresses, protocol, + * others should be masked. + */ + if (ipv4_mask->hdr.version_ihl || + ipv4_mask->hdr.type_of_service || + ipv4_mask->hdr.total_length || + ipv4_mask->hdr.packet_id || + ipv4_mask->hdr.fragment_offset || + ipv4_mask->hdr.time_to_live || + ipv4_mask->hdr.hdr_checksum) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + if ((ipv4_mask->hdr.src_addr != 0 && + ipv4_mask->hdr.src_addr != UINT32_MAX) || + (ipv4_mask->hdr.dst_addr != 0 && + ipv4_mask->hdr.dst_addr != UINT32_MAX) || + (ipv4_mask->hdr.next_proto_id != UINT8_MAX && + ipv4_mask->hdr.next_proto_id != 0)) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + filter->dst_ip_mask = ipv4_mask->hdr.dst_addr; + filter->src_ip_mask = ipv4_mask->hdr.src_addr; + filter->proto_mask = ipv4_mask->hdr.next_proto_id; + + ipv4_spec = item->spec; + filter->dst_ip = ipv4_spec->hdr.dst_addr; + filter->src_ip = ipv4_spec->hdr.src_addr; + filter->proto = ipv4_spec->hdr.next_proto_id; + } + + /* check if the next not void item is TCP or UDP */ + item = next_no_void_pattern(pattern, item); + if (item->type != RTE_FLOW_ITEM_TYPE_TCP && + item->type != RTE_FLOW_ITEM_TYPE_UDP && + item->type != RTE_FLOW_ITEM_TYPE_SCTP && + item->type != RTE_FLOW_ITEM_TYPE_END) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + if (item->type != RTE_FLOW_ITEM_TYPE_END && + (!item->spec && !item->mask)) { + goto action; + } + + /* get the TCP/UDP/SCTP info */ + if (item->type != RTE_FLOW_ITEM_TYPE_END && + (!item->spec || !item->mask)) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Invalid ntuple mask"); + return -rte_errno; + } + + /*Not supported last point for range*/ + if (item->last) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + item, "Not supported last point for range"); + return -rte_errno; + } + + if (item->type == RTE_FLOW_ITEM_TYPE_TCP) { + tcp_mask = item->mask; + + /** + * Only support src & dst ports, tcp flags, + * others should be masked. + */ + if (tcp_mask->hdr.sent_seq || + tcp_mask->hdr.recv_ack || + tcp_mask->hdr.data_off || + tcp_mask->hdr.rx_win || + tcp_mask->hdr.cksum || + tcp_mask->hdr.tcp_urp) { + memset(filter, 0, + sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + if ((tcp_mask->hdr.src_port != 0 && + tcp_mask->hdr.src_port != UINT16_MAX) || + (tcp_mask->hdr.dst_port != 0 && + tcp_mask->hdr.dst_port != UINT16_MAX)) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + filter->dst_port_mask = tcp_mask->hdr.dst_port; + filter->src_port_mask = tcp_mask->hdr.src_port; + if (tcp_mask->hdr.tcp_flags == 0xFF) { + filter->flags |= RTE_NTUPLE_FLAGS_TCP_FLAG; + } else if (!tcp_mask->hdr.tcp_flags) { + filter->flags &= ~RTE_NTUPLE_FLAGS_TCP_FLAG; + } else { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + tcp_spec = item->spec; + filter->dst_port = tcp_spec->hdr.dst_port; + filter->src_port = tcp_spec->hdr.src_port; + filter->tcp_flags = tcp_spec->hdr.tcp_flags; + } else if (item->type == RTE_FLOW_ITEM_TYPE_UDP) { + udp_mask = item->mask; + + /** + * Only support src & dst ports, + * others should be masked. + */ + if (udp_mask->hdr.dgram_len || + udp_mask->hdr.dgram_cksum) { + memset(filter, 0, + sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + if ((udp_mask->hdr.src_port != 0 && + udp_mask->hdr.src_port != UINT16_MAX) || + (udp_mask->hdr.dst_port != 0 && + udp_mask->hdr.dst_port != UINT16_MAX)) { + rte_flow_error_set(error, + EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + filter->dst_port_mask = udp_mask->hdr.dst_port; + filter->src_port_mask = udp_mask->hdr.src_port; + + udp_spec = item->spec; + filter->dst_port = udp_spec->hdr.dst_port; + filter->src_port = udp_spec->hdr.src_port; + } else if (item->type == RTE_FLOW_ITEM_TYPE_SCTP) { + sctp_mask = item->mask; + + /** + * Only support src & dst ports, + * others should be masked. + */ + if (sctp_mask->hdr.tag || + sctp_mask->hdr.cksum) { + memset(filter, 0, + sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + + filter->dst_port_mask = sctp_mask->hdr.dst_port; + filter->src_port_mask = sctp_mask->hdr.src_port; + + sctp_spec = item->spec; + filter->dst_port = sctp_spec->hdr.dst_port; + filter->src_port = sctp_spec->hdr.src_port; + } else { + goto action; + } + + /* 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_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + item, "Not supported by ntuple filter"); + return -rte_errno; + } + +action: + + /** + * n-tuple only supports forwarding, + * 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_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ACTION, + item, "Not supported action."); + return -rte_errno; + } + filter->queue = + ((const struct rte_flow_action_queue *)act->conf)->index; + + /* 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_ntuple_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_ntuple_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_ntuple_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_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER, + attr, "No support for transfer."); + return -rte_errno; + } + + if (attr->priority > 0xFFFF) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, + attr, "Error priority."); + return -rte_errno; + } + filter->priority = (uint16_t)attr->priority; + if (attr->priority < TXGBE_MIN_N_TUPLE_PRIO || + attr->priority > TXGBE_MAX_N_TUPLE_PRIO) + filter->priority = 1; + + return 0; +} + +/* a specific function for txgbe because the flags is specific */ +static int +txgbe_parse_ntuple_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_ntuple_filter *filter, + struct rte_flow_error *error) +{ + int ret; + + ret = cons_parse_ntuple_filter(attr, pattern, actions, filter, error); + + if (ret) + return ret; + + /* txgbe doesn't support tcp flags */ + if (filter->flags & RTE_NTUPLE_FLAGS_TCP_FLAG) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + NULL, "Not supported by ntuple filter"); + return -rte_errno; + } + + /* txgbe doesn't support many priorities */ + if (filter->priority < TXGBE_MIN_N_TUPLE_PRIO || + filter->priority > TXGBE_MAX_N_TUPLE_PRIO) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + NULL, "Priority not supported by ntuple filter"); + return -rte_errno; + } + + if (filter->queue >= dev->data->nb_rx_queues) { + memset(filter, 0, sizeof(struct rte_eth_ntuple_filter)); + rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_ITEM, + NULL, "Not supported by ntuple filter"); + return -rte_errno; + } + + /* fixed value for txgbe */ + filter->flags = RTE_5TUPLE_FLAGS; + return 0; +} + /** * Create or destroy a flow rule. * Theorically one rule can match more than one filters. @@ -36,8 +553,15 @@ txgbe_flow_validate(struct rte_eth_dev *dev, const struct rte_flow_action actions[], struct rte_flow_error *error) { + struct rte_eth_ntuple_filter ntuple_filter; int ret = 0; + memset(&ntuple_filter, 0, sizeof(struct rte_eth_ntuple_filter)); + ret = txgbe_parse_ntuple_filter(dev, attr, pattern, + actions, &ntuple_filter, error); + if (!ret) + return 0; + return ret; }