Eine aufbereitete Darstellung der Quelle

 
     
 
 
Anforderungen  |   Konzepte  |   Entwurf  |   Entwicklung  |   Qualitätssicherung  |   Lebenszyklus  |   Steuerung
 
 
 
 
Benutzer

products/Sources/formale Sprachen/C/LibreOffice/icon-themes/colibre/cmd/32/   (LibreOffice Version 25.8.3.2©)  Datei vom 5.10.2025 mit Größe 240 B image not shown  

Bilddatei

ksz9477_tc_flower.c


products/Sources/formale Sprachen/C/Linux/drivers/net/dsa/microchip/ksz9477_tc_flower.c

// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2023 Pengutronix, Oleksij Rempel #include "ksz9477.h" #include "ksz9477_reg.h" #include "ksz_common.h" #define ETHER_TYPE_FULL_MASK cpu_to_be16(~0) #define KSZ9477_MAX_TC 7 /** * ksz9477_flower_parse_key_l2 - Parse Layer 2 key from flow rule and configure * ACL entries accordingly. * @dev: Pointer to the ksz_device. * @port: Port number. * @extack: Pointer to the netlink_ext_ack. * @rule: Pointer to the flow_rule. * @cookie: The cookie to associate with the entry. * @prio: The priority of the entry. * * This function parses the Layer 2 key from the flow rule and configures * the corresponding ACL entries. It checks for unsupported offloads and * available entries before proceeding with the configuration. * * Returns: 0 on success or a negative error code on failure. */ static int ksz9477_flower_parse_key_l2(struct ksz_device *dev, int port, struct netlink_ext_ack *extack, struct flow_rule *rule, unsigned long cookie, u32 prio) { struct ksz9477_acl_priv *acl = dev->ports[port].acl_priv; struct flow_match_eth_addrs ematch; struct ksz9477_acl_entries *acles; int required_entries; u8 *src_mac = NULL; u8 *dst_mac = NULL; u16 ethtype = 0; if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { struct flow_match_basic match; flow_rule_match_basic(rule, &match); if (match.key->n_proto) { if (match.mask->n_proto != ETHER_TYPE_FULL_MASK) { NL_SET_ERR_MSG_MOD(extack, "ethernet type mask must be a full mask"); return -EINVAL; } ethtype = be16_to_cpu(match.key->n_proto); } } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { flow_rule_match_eth_addrs(rule, &ematch); if (!is_zero_ether_addr(ematch.key->src)) { if (!is_broadcast_ether_addr(ematch.mask->src)) goto not_full_mask_err; src_mac = ematch.key->src; } if (!is_zero_ether_addr(ematch.key->dst)) { if (!is_broadcast_ether_addr(ematch.mask->dst)) goto not_full_mask_err; dst_mac = ematch.key->dst; } } acles = &acl->acles; /* ACL supports only one MAC per entry */ required_entries = src_mac && dst_mac ? 2 : 1; /* Check if there are enough available entries */ if (acles->entries_count + required_entries > KSZ9477_ACL_MAX_ENTRIES) { NL_SET_ERR_MSG_MOD(extack, "ACL entry limit reached"); return -EOPNOTSUPP; } ksz9477_acl_match_process_l2(dev, port, ethtype, src_mac, dst_mac, cookie, prio); return 0; not_full_mask_err: NL_SET_ERR_MSG_MOD(extack, "MAC address mask must be a full mask"); return -EOPNOTSUPP; } /** * ksz9477_flower_parse_key - Parse flow rule keys for a specified port on a * ksz_device. * @dev: The ksz_device instance. * @port: The port number to parse the flow rule keys for. * @extack: The netlink extended ACK for reporting errors. * @rule: The flow_rule to parse. * @cookie: The cookie to associate with the entry. * @prio: The priority of the entry. * * This function checks if the used keys in the flow rule are supported by * the device and parses the L2 keys if they match. If unsupported keys are * used, an error message is set in the extended ACK. * * Returns: 0 on success or a negative error code on failure. */ static int ksz9477_flower_parse_key(struct ksz_device *dev, int port, struct netlink_ext_ack *extack, struct flow_rule *rule, unsigned long cookie, u32 prio) { struct flow_dissector *dissector = rule->match.dissector; int ret; if (dissector->used_keys & ~(BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) | BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL))) { NL_SET_ERR_MSG_MOD(extack, "Unsupported keys used"); return -EOPNOTSUPP; } if (flow_rule_match_has_control_flags(rule, extack)) return -EOPNOTSUPP; if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC) || flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { ret = ksz9477_flower_parse_key_l2(dev, port, extack, rule, cookie, prio); if (ret) return ret; } return 0; } /** * ksz9477_flower_parse_action - Parse flow rule actions for a specified port * on a ksz_device. * @dev: The ksz_device instance. * @port: The port number to parse the flow rule actions for. * @extack: The netlink extended ACK for reporting errors. * @cls: The flow_cls_offload instance containing the flow rule. * @entry_idx: The index of the ACL entry to store the action. * * This function checks if the actions in the flow rule are supported by * the device. Currently, only actions that change priorities are supported. * If unsupported actions are encountered, an error message is set in the * extended ACK. * * Returns: 0 on success or a negative error code on failure. */ static int ksz9477_flower_parse_action(struct ksz_device *dev, int port, struct netlink_ext_ack *extack, struct flow_cls_offload *cls, int entry_idx) { struct flow_rule *rule = flow_cls_offload_flow_rule(cls); struct ksz9477_acl_priv *acl = dev->ports[port].acl_priv; const struct flow_action_entry *act; struct ksz9477_acl_entry *entry; bool prio_force = false; u8 prio_val = 0; int i; if (TC_H_MIN(cls->classid)) { NL_SET_ERR_MSG_MOD(extack, "hw_tc is not supported. Use: action skbedit prio"); return -EOPNOTSUPP; } flow_action_for_each(i, act, &rule->action) { switch (act->id) { case FLOW_ACTION_PRIORITY: if (act->priority > KSZ9477_MAX_TC) { NL_SET_ERR_MSG_MOD(extack, "Priority value is too high"); return -EOPNOTSUPP; } prio_force = true; prio_val = act->priority; break; default: NL_SET_ERR_MSG_MOD(extack, "action not supported"); return -EOPNOTSUPP; } } /* pick entry to store action */ entry = &acl->acles.entries[entry_idx]; ksz9477_acl_action_rule_cfg(entry->entry, prio_force, prio_val); ksz9477_acl_processing_rule_set_action(entry->entry, entry_idx); return 0; } /** * ksz9477_cls_flower_add - Add a flow classification rule for a specified port * on a ksz_device. * @ds: The DSA switch instance. * @port: The port number to add the flow classification rule to. * @cls: The flow_cls_offload instance containing the flow rule. * @ingress: A flag indicating if the rule is applied on the ingress path. * * This function adds a flow classification rule for a specified port on a * ksz_device. It checks if the ACL offloading is supported and parses the flow * keys and actions. If the ACL is not supported, it returns an error. If there * are unprocessed entries, it parses the action for the rule. * * Returns: 0 on success or a negative error code on failure. */ int ksz9477_cls_flower_add(struct dsa_switch *ds, int port, struct flow_cls_offload *cls, bool ingress) { struct flow_rule *rule = flow_cls_offload_flow_rule(cls); struct netlink_ext_ack *extack = cls->common.extack; struct ksz_device *dev = ds->priv; struct ksz9477_acl_priv *acl; int action_entry_idx; int ret; acl = dev->ports[port].acl_priv; if (!acl) { NL_SET_ERR_MSG_MOD(extack, "ACL offloading is not supported"); return -EOPNOTSUPP; } /* A complex rule set can take multiple entries. Use first entry * to store the action. */ action_entry_idx = acl->acles.entries_count; ret = ksz9477_flower_parse_key(dev, port, extack, rule, cls->cookie, cls->common.prio); if (ret) return ret; ret = ksz9477_flower_parse_action(dev, port, extack, cls, action_entry_idx); if (ret) return ret; ret = ksz9477_sort_acl_entries(dev, port); if (ret) return ret; return ksz9477_acl_write_list(dev, port); } /** * ksz9477_cls_flower_del - Remove a flow classification rule for a specified * port on a ksz_device. * @ds: The DSA switch instance. * @port: The port number to remove the flow classification rule from. * @cls: The flow_cls_offload instance containing the flow rule. * @ingress: A flag indicating if the rule is applied on the ingress path. * * This function removes a flow classification rule for a specified port on a * ksz_device. It checks if the ACL is initialized, and if not, returns an * error. If the ACL is initialized, it removes entries with the specified * cookie and rewrites the ACL list. * * Returns: 0 on success or a negative error code on failure. */ int ksz9477_cls_flower_del(struct dsa_switch *ds, int port, struct flow_cls_offload *cls, bool ingress) { unsigned long cookie = cls->cookie; struct ksz_device *dev = ds->priv; struct ksz9477_acl_priv *acl; acl = dev->ports[port].acl_priv; if (!acl) return -EOPNOTSUPP; ksz9477_acl_remove_entries(dev, port, &acl->acles, cookie); return ksz9477_acl_write_list(dev, port); }

                                                                                                                                                                                                                                                                                                                                                                                                     

Neuigkeiten

     Aktuelles
     Motto des Tages

Open Source Software

     Quellcodebibliothek
     Eigene Quellcodes
     Fremde Quellcodes
     Suchen
Jenseits des Üblichen ....
    

Besucherstatistik

Besucherstatistik
Statistik
#Sources=1127926
#Domains=1947682