| /* |
| ************************************************************************** |
| * Copyright (c) 2021, The Linux Foundation. All rights reserved. |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all copies. |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| ************************************************************************** |
| */ |
| #include <linux/module.h> |
| #include <linux/version.h> |
| #include <linux/types.h> |
| #include <linux/skbuff.h> |
| #include <linux/ctype.h> |
| #include <linux/etherdevice.h> |
| |
| #include "ecm_ae_classifier_public.h" |
| |
| /* |
| * This is the module which selects the underlying acceleration engine |
| * based ont eh 5-tuple and type of the flow. The flow can be multicast, routed, |
| * bridged, ported/non-ported. |
| */ |
| |
| /* |
| * ecm_ae_select() |
| * Selects the acceleration engine based on the given flow information. |
| */ |
| ecm_ae_classifier_result_t ecm_ae_select(struct ecm_ae_classifier_info *info) |
| { |
| pr_debug("%px: Acceleration engine selection\n", info); |
| |
| /* |
| * Multicast flows can be accelerated by NSS only. |
| */ |
| if (info->flag & ECM_AE_CLASSIFIER_FLOW_MULTICAST) { |
| return ECM_AE_CLASSIFIER_RESULT_NSS; |
| } |
| |
| /* |
| * Non-ported flows can be accelerated by NSS only. |
| */ |
| if (info->protocol != IPPROTO_TCP && info->protocol != IPPROTO_UDP) { |
| return ECM_AE_CLASSIFIER_RESULT_NSS; |
| } |
| |
| /* |
| * Let's accelerate all other routed flows by SFE. |
| */ |
| if (info->flag & ECM_AE_CLASSIFIER_FLOW_ROUTED) { |
| return ECM_AE_CLASSIFIER_RESULT_SFE; |
| } |
| |
| /* |
| * Let's accelerate all bridge flows by NSS. |
| */ |
| return ECM_AE_CLASSIFIER_RESULT_NSS; |
| } |
| |
| static struct ecm_ae_classifier_ops ae_ops = { |
| .ae_get = ecm_ae_select |
| }; |
| |
| /* |
| * ecm_ae_select_init() |
| */ |
| static int __init ecm_ae_select_init(void) |
| { |
| pr_info("ECM AE Select INIT\n"); |
| |
| /* |
| * Register the callbacks. |
| */ |
| ecm_ae_classifier_ops_register(&ae_ops); |
| |
| return 0; |
| } |
| |
| /* |
| * ecm_ae_select_exit() |
| */ |
| static void __exit ecm_ae_select_exit(void) |
| { |
| pr_info("ECM AE Select EXIT\n"); |
| |
| /* |
| * Unregister the callbacks. |
| */ |
| ecm_ae_classifier_ops_unregister(); |
| } |
| |
| module_init(ecm_ae_select_init) |
| module_exit(ecm_ae_select_exit) |
| |
| MODULE_DESCRIPTION("ECM Acceleration Engine Selection Module"); |
| #ifdef MODULE_LICENSE |
| MODULE_LICENSE("Dual BSD/GPL"); |
| #endif |