numam-dpdk/lib/librte_flow_classify/rte_flow_classify_parse.c

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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Intel Corporation
*/
#include <rte_flow_classify.h>
#include "rte_flow_classify_parse.h"
#include <rte_flow_driver.h>
struct classify_valid_pattern {
enum rte_flow_item_type *items;
parse_filter_t parse_filter;
};
static struct classify_action action;
/* Pattern for IPv4 5-tuple UDP filter */
static enum rte_flow_item_type pattern_ntuple_1[] = {
RTE_FLOW_ITEM_TYPE_ETH,
RTE_FLOW_ITEM_TYPE_IPV4,
RTE_FLOW_ITEM_TYPE_UDP,
RTE_FLOW_ITEM_TYPE_END,
};
/* Pattern for IPv4 5-tuple TCP filter */
static enum rte_flow_item_type pattern_ntuple_2[] = {
RTE_FLOW_ITEM_TYPE_ETH,
RTE_FLOW_ITEM_TYPE_IPV4,
RTE_FLOW_ITEM_TYPE_TCP,
RTE_FLOW_ITEM_TYPE_END,
};
/* Pattern for IPv4 5-tuple SCTP filter */
static enum rte_flow_item_type pattern_ntuple_3[] = {
RTE_FLOW_ITEM_TYPE_ETH,
RTE_FLOW_ITEM_TYPE_IPV4,
RTE_FLOW_ITEM_TYPE_SCTP,
RTE_FLOW_ITEM_TYPE_END,
};
static int
classify_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);
static struct classify_valid_pattern classify_supported_patterns[] = {
/* ntuple */
{ pattern_ntuple_1, classify_parse_ntuple_filter },
{ pattern_ntuple_2, classify_parse_ntuple_filter },
{ pattern_ntuple_3, classify_parse_ntuple_filter },
};
struct classify_action *
classify_get_flow_action(void)
{
return &action;
}
/* Find the first VOID or non-VOID item pointer */
const struct rte_flow_item *
classify_find_first_item(const struct rte_flow_item *item, bool is_void)
{
bool is_find;
while (item->type != RTE_FLOW_ITEM_TYPE_END) {
if (is_void)
is_find = item->type == RTE_FLOW_ITEM_TYPE_VOID;
else
is_find = item->type != RTE_FLOW_ITEM_TYPE_VOID;
if (is_find)
break;
item++;
}
return item;
}
/* Skip all VOID items of the pattern */
void
classify_pattern_skip_void_item(struct rte_flow_item *items,
const struct rte_flow_item *pattern)
{
uint32_t cpy_count = 0;
const struct rte_flow_item *pb = pattern, *pe = pattern;
for (;;) {
/* Find a non-void item first */
pb = classify_find_first_item(pb, false);
if (pb->type == RTE_FLOW_ITEM_TYPE_END) {
pe = pb;
break;
}
/* Find a void item */
pe = classify_find_first_item(pb + 1, true);
cpy_count = pe - pb;
rte_memcpy(items, pb, sizeof(struct rte_flow_item) * cpy_count);
items += cpy_count;
if (pe->type == RTE_FLOW_ITEM_TYPE_END) {
pb = pe;
break;
}
}
/* Copy the END item. */
rte_memcpy(items, pe, sizeof(struct rte_flow_item));
}
/* Check if the pattern matches a supported item type array */
static bool
classify_match_pattern(enum rte_flow_item_type *item_array,
struct rte_flow_item *pattern)
{
struct rte_flow_item *item = pattern;
while ((*item_array == item->type) &&
(*item_array != RTE_FLOW_ITEM_TYPE_END)) {
item_array++;
item++;
}
return (*item_array == RTE_FLOW_ITEM_TYPE_END &&
item->type == RTE_FLOW_ITEM_TYPE_END);
}
/* Find if there's parse filter function matched */
parse_filter_t
classify_find_parse_filter_func(struct rte_flow_item *pattern)
{
parse_filter_t parse_filter = NULL;
uint8_t i = 0;
for (; i < RTE_DIM(classify_supported_patterns); i++) {
if (classify_match_pattern(classify_supported_patterns[i].items,
pattern)) {
parse_filter =
classify_supported_patterns[i].parse_filter;
break;
}
}
return parse_filter;
}
#define FLOW_RULE_MIN_PRIORITY 8
#define FLOW_RULE_MAX_PRIORITY 0
#define NEXT_ITEM_OF_PATTERN(item, pattern, index)\
do {\
item = pattern + index;\
while (item->type == RTE_FLOW_ITEM_TYPE_VOID) {\
index++;\
item = pattern + index;\
} \
} while (0)
#define NEXT_ITEM_OF_ACTION(act, actions, index)\
do {\
act = actions + index;\
while (act->type == RTE_FLOW_ACTION_TYPE_VOID) {\
index++;\
act = actions + index;\
} \
} while (0)
/**
* 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
classify_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_action_count *count;
const struct rte_flow_action_mark *mark_spec;
uint32_t index;
/* parse pattern */
index = 0;
/* the first not void item can be MAC or IPv4 */
NEXT_ITEM_OF_PATTERN(item, pattern, index);
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 -EINVAL;
}
/* Skip Ethernet */
if (item->type == RTE_FLOW_ITEM_TYPE_ETH) {
/*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 -EINVAL;
}
/* if the first 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,
"Not supported by ntuple filter");
return -EINVAL;
}
/* check if the next not void item is IPv4 */
index++;
NEXT_ITEM_OF_PATTERN(item, pattern, index);
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 -EINVAL;
}
}
/* 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 -EINVAL;
}
/*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 -EINVAL;
}
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 -EINVAL;
}
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 or SCTP */
index++;
NEXT_ITEM_OF_PATTERN(item, pattern, index);
if (item->type != RTE_FLOW_ITEM_TYPE_TCP &&
item->type != RTE_FLOW_ITEM_TYPE_UDP &&
item->type != RTE_FLOW_ITEM_TYPE_SCTP) {
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 -EINVAL;
}
/* get the TCP/UDP info */
if (!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 -EINVAL;
}
/*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 -EINVAL;
}
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 -EINVAL;
}
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 -EINVAL;
}
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 -EINVAL;
}
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 {
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 -EINVAL;
}
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;
}
/* check if the next not void item is END */
index++;
NEXT_ITEM_OF_PATTERN(item, pattern, index);
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 -EINVAL;
}
table_type = RTE_FLOW_CLASSIFY_TABLE_ACL_IP4_5TUPLE;
/* 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 -EINVAL;
}
/* 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 -EINVAL;
}
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 -EINVAL;
}
filter->priority = (uint16_t)attr->priority;
if (attr->priority > FLOW_RULE_MIN_PRIORITY)
filter->priority = FLOW_RULE_MAX_PRIORITY;
/* parse action */
index = 0;
/**
* n-tuple only supports count and Mark,
* check if the first not void action is COUNT or MARK.
*/
memset(&action, 0, sizeof(action));
NEXT_ITEM_OF_ACTION(act, actions, index);
switch (act->type) {
case RTE_FLOW_ACTION_TYPE_COUNT:
action.action_mask |= 1LLU << RTE_FLOW_ACTION_TYPE_COUNT;
count = act->conf;
memcpy(&action.act.counter, count, sizeof(action.act.counter));
break;
case RTE_FLOW_ACTION_TYPE_MARK:
action.action_mask |= 1LLU << RTE_FLOW_ACTION_TYPE_MARK;
mark_spec = act->conf;
memcpy(&action.act.mark, mark_spec, sizeof(action.act.mark));
break;
default:
memset(filter, 0, sizeof(struct rte_eth_ntuple_filter));
rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, act,
"Invalid action.");
return -EINVAL;
}
/* check if the next not void item is MARK or COUNT or END */
index++;
NEXT_ITEM_OF_ACTION(act, actions, index);
switch (act->type) {
case RTE_FLOW_ACTION_TYPE_COUNT:
action.action_mask |= 1LLU << RTE_FLOW_ACTION_TYPE_COUNT;
count = act->conf;
memcpy(&action.act.counter, count, sizeof(action.act.counter));
break;
case RTE_FLOW_ACTION_TYPE_MARK:
action.action_mask |= 1LLU << RTE_FLOW_ACTION_TYPE_MARK;
mark_spec = act->conf;
memcpy(&action.act.mark, mark_spec, sizeof(action.act.mark));
break;
case RTE_FLOW_ACTION_TYPE_END:
return 0;
default:
memset(filter, 0, sizeof(struct rte_eth_ntuple_filter));
rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, act,
"Invalid action.");
return -EINVAL;
}
/* check if the next not void item is END */
index++;
NEXT_ITEM_OF_ACTION(act, actions, index);
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,
"Invalid action.");
return -EINVAL;
}
return 0;
}