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Diffstat (limited to 'doc/guides/prog_guide/flow_classify_lib.rst')
| -rw-r--r-- | doc/guides/prog_guide/flow_classify_lib.rst | 114 |
1 files changed, 51 insertions, 63 deletions
diff --git a/doc/guides/prog_guide/flow_classify_lib.rst b/doc/guides/prog_guide/flow_classify_lib.rst index 820dc72a..f0ed5a1a 100644 --- a/doc/guides/prog_guide/flow_classify_lib.rst +++ b/doc/guides/prog_guide/flow_classify_lib.rst @@ -1,32 +1,5 @@ -.. BSD LICENSE - Copyright(c) 2017 Intel Corporation. All rights reserved. - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in - the documentation and/or other materials provided with the - distribution. - * Neither the name of Intel Corporation nor the names of its - contributors may be used to endorse or promote products derived - from this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.. SPDX-License-Identifier: BSD-3-Clause + Copyright(c) 2017 Intel Corporation. Flow Classification Library =========================== @@ -101,30 +74,50 @@ The library has the following API's * Handle to flow classifier instance * @param params * Parameters for flow_classify table creation - * @param table_id - * Table ID. Valid only within the scope of table IDs of the current - * classifier. Only returned after a successful invocation. * @return * 0 on success, error code otherwise */ int rte_flow_classify_table_create(struct rte_flow_classifier *cls, - struct rte_flow_classify_table_params *params, - uint32_t *table_id); + struct rte_flow_classify_table_params *params); + + /** + * Validate the flow classify rule + * + * @param[in] cls + * Handle to flow classifier instance + * @param[in] attr + * Flow rule attributes + * @param[in] pattern + * Pattern specification (list terminated by the END pattern item). + * @param[in] actions + * Associated actions (list terminated by the END pattern item). + * @param[out] error + * Perform verbose error reporting if not NULL. Structure + * initialised in case of error only. + * @return + * 0 on success, error code otherwise + */ + int + rte_flow_classify_validate(struct rte_flow_classifier *cls, + const struct rte_flow_attr *attr, + const struct rte_flow_item pattern[], + const struct rte_flow_action actions[], + struct rte_flow_error *error); /** * Add a flow classify rule to the flow_classifier table. * * @param[in] cls * Flow classifier handle - * @param[in] table_id - * id of table * @param[in] attr * Flow rule attributes * @param[in] pattern * Pattern specification (list terminated by the END pattern item). * @param[in] actions * Associated actions (list terminated by the END pattern item). + * @param[out] key_found + * returns 1 if rule present already, 0 otherwise. * @param[out] error * Perform verbose error reporting if not NULL. Structure * initialised in case of error only. @@ -133,10 +126,10 @@ The library has the following API's */ struct rte_flow_classify_rule * rte_flow_classify_table_entry_add(struct rte_flow_classifier *cls, - uint32_t table_id, const struct rte_flow_attr *attr, const struct rte_flow_item pattern[], const struct rte_flow_action actions[], + int *key_found; struct rte_flow_error *error); /** @@ -144,8 +137,6 @@ The library has the following API's * * @param[in] cls * Flow classifier handle - * @param[in] table_id - * id of table * @param[in] rule * Flow classify rule * @return @@ -153,7 +144,6 @@ The library has the following API's */ int rte_flow_classify_table_entry_delete(struct rte_flow_classifier *cls, - uint32_t table_id, struct rte_flow_classify_rule *rule); /** @@ -161,8 +151,6 @@ The library has the following API's * * @param[in] cls * Flow classifier handle - * @param[in] table_id - * id of table * @param[in] pkts * Pointer to packets to process * @param[in] nb_pkts @@ -177,7 +165,6 @@ The library has the following API's */ int rte_flow_classifier_query(struct rte_flow_classifier *cls, - uint32_t table_id, struct rte_mbuf **pkts, const uint16_t nb_pkts, struct rte_flow_classify_rule *rule, @@ -200,16 +187,13 @@ application before calling the API. /** CPU socket ID where memory for the flow classifier and its */ /** elements (tables) should be allocated */ int socket_id; - - /** Table type */ - enum rte_flow_classify_table_type type; }; The ``Classifier`` has the following internal structures: .. code-block:: c - struct rte_table { + struct rte_cls_table { /* Input parameters */ struct rte_table_ops ops; uint32_t entry_size; @@ -225,11 +209,16 @@ The ``Classifier`` has the following internal structures: /* Input parameters */ char name[RTE_FLOW_CLASSIFIER_MAX_NAME_SZ]; int socket_id; - enum rte_flow_classify_table_type type; - /* Internal tables */ - struct rte_table tables[RTE_FLOW_CLASSIFY_TABLE_MAX]; + /* Internal */ + /* ntuple_filter */ + struct rte_eth_ntuple_filter ntuple_filter; + + /* classifier tables */ + struct rte_cls_table tables[RTE_FLOW_CLASSIFY_TABLE_MAX]; + uint32_t table_mask; uint32_t num_tables; + uint16_t nb_pkts; struct rte_flow_classify_table_entry *entries[RTE_PORT_IN_BURST_SIZE_MAX]; @@ -252,9 +241,8 @@ application before calling the API. /** Opaque param to be passed to the table create operation */ void *arg_create; - /** Memory size to be reserved per classifier object entry for */ - /** storing meta data */ - uint32_t table_metadata_size; + /** Classifier table type */ + enum rte_flow_classify_table_type type; }; To create an ACL table the ``rte_table_acl_params`` structure must be @@ -314,14 +302,14 @@ and SCTP. RTE_FLOW_ITEM_TYPE_END, }; -The internal function ``flow_classify_parse_flow`` parses the +The API function ``rte_flow_classify_validate`` parses the IPv4 5-tuple pattern, attributes and actions and returns the 5-tuple data in the ``rte_eth_ntuple_filter`` structure. .. code-block:: c static int - flow_classify_parse_flow( + rte_flow_classify_validate(struct rte_flow_classifier *cls, const struct rte_flow_attr *attr, const struct rte_flow_item pattern[], const struct rte_flow_action actions[], @@ -333,7 +321,7 @@ Adding Flow Rules The ``rte_flow_classify_table_entry_add`` API creates an ``rte_flow_classify`` object which contains the flow_classify id and type, the action, a union of add and delete keys and a union of rules. -It uses the ``flow_classify_parse_flow`` internal function for parsing the +It uses the ``rte_flow_classify_validate`` API function for parsing the flow parameters. The 5-tuple ACL key data is obtained from the ``rte_eth_ntuple_filter`` structure populated by the ``classify_parse_ntuple_filter`` function which @@ -343,7 +331,7 @@ parses the Flow rule. struct acl_keys { struct rte_table_acl_rule_add_params key_add; /* add key */ - struct rte_table_acl_rule_delete_params key_del; /* delete key */ + struct rte_table_acl_rule_delete_params key_del; /* delete key */ }; struct classify_rules { @@ -355,24 +343,24 @@ parses the Flow rule. struct rte_flow_classify { uint32_t id; /* unique ID of classify object */ - struct rte_flow_action action; /* action when match found */ - struct classify_rules rules; /* union of rules */ + enum rte_flow_classify_table_type tbl_type; /* rule table */ + struct classify_rules rules; /* union of rules */ union { struct acl_keys key; } u; int key_found; /* rule key found in table */ - void *entry; /* pointer to buffer to hold rule meta data */ + struct rte_flow_classify_table_entry entry; /* rule meta data */ void *entry_ptr; /* handle to the table entry for rule meta data */ }; -It then calls the ``table[table_id].ops.f_add`` API to add the rule to the ACL +It then calls the ``table.ops.f_add`` API to add the rule to the ACL table. Deleting Flow Rules ~~~~~~~~~~~~~~~~~~~ The ``rte_flow_classify_table_entry_delete`` API calls the -``table[table_id].ops.f_delete`` API to delete a rule from the ACL table. +``table.ops.f_delete`` API to delete a rule from the ACL table. Packet Matching ~~~~~~~~~~~~~~~ @@ -380,7 +368,7 @@ Packet Matching The ``rte_flow_classifier_query`` API is used to find packets which match a given flow Flow rule in the table. This API calls the flow_classify_run internal function which calls the -``table[table_id].ops.f_lookup`` API to see if any packets in a burst match any +``table.ops.f_lookup`` API to see if any packets in a burst match any of the Flow rules in the table. The meta data for the highest priority rule matched for each packet is returned in the entries array in the ``rte_flow_classify`` object. |