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Diffstat (limited to 'vnet/vnet/feature/feature.h')
| -rw-r--r-- | vnet/vnet/feature/feature.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/vnet/vnet/feature/feature.h b/vnet/vnet/feature/feature.h new file mode 100644 index 00000000000..1706dec5456 --- /dev/null +++ b/vnet/vnet/feature/feature.h @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef included_features_h +#define included_features_h + +#include <vnet/vnet.h> + +/** feature registration object */ +typedef struct _vnet_feature_arc_registration +{ + /** next registration in list of all registrations*/ + struct _vnet_feature_arc_registration *next; + /** Feature Arc name */ + char *arc_name; + /** Start nodes */ + char **start_nodes; + int n_start_nodes; + /* Feature arc index, assigned by init function */ + u16 feature_arc_index; +} vnet_feature_arc_registration_t; + +/** feature registration object */ +typedef struct _vnet_feature_registration +{ + /** next registration in list of all registrations*/ + struct _vnet_feature_registration *next; + /** Feature arc name */ + char *arc_name; + /** Graph node name */ + char *node_name; + /** Pointer to this feature index, filled in by vnet_feature_arc_init */ + u32 *feature_index; + u32 feature_index_u32; + /** Constraints of the form "this feature runs before X" */ + char **runs_before; + /** Constraints of the form "this feature runs after Y" */ + char **runs_after; +} vnet_feature_registration_t; + +typedef struct vnet_feature_config_main_t_ +{ + vnet_config_main_t config_main; + u32 *config_index_by_sw_if_index; +} vnet_feature_config_main_t; + +typedef struct +{ + /** feature arc configuration list */ + vnet_feature_arc_registration_t *next_arc; + uword **arc_index_by_name; + + /** feature path configuration lists */ + vnet_feature_registration_t *next_feature; + vnet_feature_registration_t **next_feature_by_arc; + uword **next_feature_by_name; + + /** feature config main objects */ + vnet_feature_config_main_t *feature_config_mains; + + /** Save partial order results for show command */ + char ***feature_nodes; + + /** bitmap of interfaces which have driver rx features configured */ + uword **sw_if_index_has_features; + + /** feature reference counts by interface */ + i16 **feature_count_by_sw_if_index; + + /** convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} vnet_feature_main_t; + +extern vnet_feature_main_t feature_main; + +#define VNET_FEATURE_ARC_INIT(x,...) \ + __VA_ARGS__ vnet_feature_arc_registration_t vnet_feat_arc_##x;\ +static void __vnet_add_feature_arc_registration_##x (void) \ + __attribute__((__constructor__)) ; \ +static void __vnet_add_feature_arc_registration_##x (void) \ +{ \ + vnet_feature_main_t * fm = &feature_main; \ + vnet_feat_arc_##x.next = fm->next_arc; \ + fm->next_arc = & vnet_feat_arc_##x; \ +} \ +__VA_ARGS__ vnet_feature_arc_registration_t vnet_feat_arc_##x + +#define VNET_FEATURE_INIT(x,...) \ + __VA_ARGS__ vnet_feature_registration_t vnet_feat_##x; \ +static void __vnet_add_feature_registration_##x (void) \ + __attribute__((__constructor__)) ; \ +static void __vnet_add_feature_registration_##x (void) \ +{ \ + vnet_feature_main_t * fm = &feature_main; \ + vnet_feat_##x.next = fm->next_feature; \ + fm->next_feature = & vnet_feat_##x; \ +} \ +__VA_ARGS__ vnet_feature_registration_t vnet_feat_##x + +void +vnet_config_update_feature_count (vnet_feature_main_t * fm, u16 arc, + u32 sw_if_index, int is_add); + +u32 vnet_feature_index_from_node_name (u16 type, const char *s); + +void +vnet_feature_enable_disable (const char *arc_name, const char *node_name, + u32 sw_if_index, int enable_disable, + void *feature_config, + u32 n_feature_config_bytes); + + +static_always_inline int +vnet_have_features (u32 arc, u32 sw_if_index) +{ + vnet_feature_main_t *fm = &feature_main; + return clib_bitmap_get (fm->sw_if_index_has_features[arc], sw_if_index); +} + +static_always_inline u32 +vnet_feature_get_config_index (u16 arc, u32 sw_if_index) +{ + vnet_feature_main_t *fm = &feature_main; + vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc]; + return vec_elt (cm->config_index_by_sw_if_index, sw_if_index); +} + +static_always_inline void +vnet_feature_redirect (u16 arc, u32 sw_if_index, u32 * next0, + vlib_buffer_t * b0) +{ + vnet_feature_main_t *fm = &feature_main; + vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc]; + + if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index))) + { + b0->current_config_index = + vec_elt (cm->config_index_by_sw_if_index, sw_if_index); + vnet_get_config_data (&cm->config_main, &b0->current_config_index, + next0, /* # bytes of config data */ 0); + } +} + +static_always_inline void +vnet_feature_device_input_redirect_x1 (vlib_node_runtime_t * node, + u32 sw_if_index, u32 * next0, + vlib_buffer_t * b0, + u16 buffer_advanced0) +{ + vnet_feature_main_t *fm = &feature_main; + vnet_feature_config_main_t *cm; + + ASSERT (node->feature_arc_index != ~(u16) 0); + cm = &fm->feature_config_mains[node->feature_arc_index]; + + if (PREDICT_FALSE + (clib_bitmap_get + (fm->sw_if_index_has_features[node->feature_arc_index], sw_if_index))) + { + /* + * Save next0 so that the last feature in the chain + * can skip ethernet-input if indicated... + */ + vnet_buffer (b0)->device_input_feat.saved_next_index = *next0; + vnet_buffer (b0)->device_input_feat.buffer_advance = buffer_advanced0; + vlib_buffer_advance (b0, -buffer_advanced0); + + b0->current_config_index = + vec_elt (cm->config_index_by_sw_if_index, sw_if_index); + vnet_get_config_data (&cm->config_main, &b0->current_config_index, + next0, /* # bytes of config data */ 0); + } +} + +#define ORDER_CONSTRAINTS (char*[]) +#define VNET_FEATURES(...) (char*[]) { __VA_ARGS__, 0} + +clib_error_t *vnet_feature_arc_init (vlib_main_t * vm, + vnet_config_main_t * vcm, + char **feature_start_nodes, + int num_feature_start_nodes, + vnet_feature_registration_t * + first_reg, char ***feature_nodes); + +void vnet_interface_features_show (vlib_main_t * vm, u32 sw_if_index); + +#endif /* included_feature_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |