src/vnet/feature/feature.h

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef included_features_h
  17 #define included_features_h
  18
  19 #include <vnet/vnet.h>
  20 #include <vnet/api_errno.h>
  21 #include <vnet/devices/devices.h>
  22
  23 /** feature registration object */
  24 typedef struct _vnet_feature_arc_registration
  25 {
  26   /** next registration in list of all registrations*/
  27   struct _vnet_feature_arc_registration *next;
  28   /** Feature Arc name */
  29   char *arc_name;
  30   /** Start nodes */
  31   char **start_nodes;
  32   int n_start_nodes;
  33   /** End of the arc (optional, for consistency-checking) */
  34   char *last_in_arc;
  35   /* Feature arc index, assigned by init function */
  36   u8 feature_arc_index;
  37   u8 *arc_index_ptr;
  38 } vnet_feature_arc_registration_t;
  39
  40 /* Enable feature callback. */
  41 typedef clib_error_t *(vnet_feature_enable_disable_function_t)
  42   (u32 sw_if_index, int enable_disable);
  43
  44 /** feature registration object */
  45 typedef struct _vnet_feature_registration
  46 {
  47   /** next registration in list of all registrations*/
  48   struct _vnet_feature_registration *next, *next_in_arc;
  49   /** Feature arc name */
  50   char *arc_name;
  51   /** Graph node name */
  52   char *node_name;
  53   /** Pointer to this feature index, filled in by vnet_feature_arc_init */
  54   u32 *feature_index_ptr;
  55   u32 feature_index;
  56   /** Constraints of the form "this feature runs before X" */
  57   char **runs_before;
  58   /** Constraints of the form "this feature runs after Y" */
  59   char **runs_after;
  60
  61   /** Function to enable/disable feature  **/
  62   vnet_feature_enable_disable_function_t *enable_disable_cb;
  63 } vnet_feature_registration_t;
  64
  65 /** constraint registration object */
  66 typedef struct _vnet_feature_constraint_registration
  67 {
  68   /** next constraint set in list of all registrations*/
  69   struct _vnet_feature_constraint_registration *next, *next_in_arc;
  70   /** Feature arc name */
  71   char *arc_name;
  72
  73   /** Feature arc index, assigned by init function */
  74   u8 feature_arc_index;
  75
  76   /** Node names, to run in the specified order */
  77   char **node_names;
  78 } vnet_feature_constraint_registration_t;
  79
  80 typedef struct vnet_feature_config_main_t_
  81 {
  82   vnet_config_main_t config_main;
  83   u32 *config_index_by_sw_if_index;
  84 } vnet_feature_config_main_t;
  85
  86 typedef struct
  87 {
  88   /** feature arc configuration list */
  89   vnet_feature_arc_registration_t *next_arc;
  90   uword **arc_index_by_name;
  91
  92   /** feature path configuration lists */
  93   vnet_feature_registration_t *next_feature;
  94   vnet_feature_registration_t **next_feature_by_arc;
  95   vnet_feature_constraint_registration_t *next_constraint;
  96   vnet_feature_constraint_registration_t **next_constraint_by_arc;
  97   uword **next_feature_by_name;
  98
  99   /** feature config main objects */
 100   vnet_feature_config_main_t *feature_config_mains;
 101
 102   /** Save partial order results for show command */
 103   char ***feature_nodes;
 104
 105   /** bitmap of interfaces which have driver rx features configured */
 106   uword **sw_if_index_has_features;
 107
 108   /** feature reference counts by interface */
 109   i16 **feature_count_by_sw_if_index;
 110
 111   /** Feature arc index for device-input */
 112   u8 device_input_feature_arc_index;
 113
 114   /** convenience */
 115   vlib_main_t *vlib_main;
 116   vnet_main_t *vnet_main;
 117 } vnet_feature_main_t;
 118
 119 extern vnet_feature_main_t feature_main;
 120
 121 #ifndef CLIB_MARCH_VARIANT
 122 #define VNET_FEATURE_ARC_INIT(x,...)                            \
 123   __VA_ARGS__ vnet_feature_arc_registration_t vnet_feat_arc_##x;\
 124 static void __vnet_add_feature_arc_registration_##x (void)      \
 125   __attribute__((__constructor__)) ;                            \
 126 static void __vnet_add_feature_arc_registration_##x (void)      \
 127 {                                                               \
 128   vnet_feature_main_t * fm = &feature_main;                     \
 129   vnet_feat_arc_##x.next = fm->next_arc;                        \
 130   fm->next_arc = & vnet_feat_arc_##x;                           \
 131 }                                                               \
 132 static void __vnet_rm_feature_arc_registration_##x (void)       \
 133   __attribute__((__destructor__)) ;                             \
 134 static void __vnet_rm_feature_arc_registration_##x (void)       \
 135 {                                                               \
 136   vnet_feature_main_t * fm = &feature_main;                     \
 137   vnet_feature_arc_registration_t *r = &vnet_feat_arc_##x;      \
 138   VLIB_REMOVE_FROM_LINKED_LIST (fm->next_arc, r, next);         \
 139 }                                                               \
 140 __VA_ARGS__ vnet_feature_arc_registration_t vnet_feat_arc_##x
 141
 142 #define VNET_FEATURE_INIT(x,...)                                \
 143   __VA_ARGS__ vnet_feature_registration_t vnet_feat_##x;        \
 144 static void __vnet_add_feature_registration_##x (void)          \
 145   __attribute__((__constructor__)) ;                            \
 146 static void __vnet_add_feature_registration_##x (void)          \
 147 {                                                               \
 148   vnet_feature_main_t * fm = &feature_main;                     \
 149   vnet_feat_##x.next = fm->next_feature;                        \
 150   fm->next_feature = & vnet_feat_##x;                           \
 151 }                                                               \
 152 static void __vnet_rm_feature_registration_##x (void)           \
 153   __attribute__((__destructor__)) ;                             \
 154 static void __vnet_rm_feature_registration_##x (void)           \
 155 {                                                               \
 156   vnet_feature_main_t * fm = &feature_main;                     \
 157   vnet_feature_registration_t *r = &vnet_feat_##x;              \
 158   VLIB_REMOVE_FROM_LINKED_LIST (fm->next_feature, r, next);     \
 159 }                                                               \
 160 __VA_ARGS__ vnet_feature_registration_t vnet_feat_##x
 161
 162 #define VNET_FEATURE_ARC_ORDER(x,...)                                   \
 163   __VA_ARGS__ vnet_feature_constraint_registration_t                    \
 164 vnet_feature_constraint_##x;                                            \
 165 static void __vnet_add_constraint_registration_##x (void)               \
 166   __attribute__((__constructor__)) ;                                    \
 167 static void __vnet_add_constraint_registration_##x (void)               \
 168 {                                                                       \
 169   vnet_feature_main_t * fm = &feature_main;                             \
 170   vnet_feature_constraint_##x.next = fm->next_constraint;               \
 171   fm->next_constraint = & vnet_feature_constraint_##x;                  \
 172 }                                                                       \
 173 static void __vnet_rm_constraint_registration_##x (void)                \
 174   __attribute__((__destructor__)) ;                                     \
 175 static void __vnet_rm_constraint_registration_##x (void)                \
 176 {                                                                       \
 177   vnet_feature_main_t * fm = &feature_main;                             \
 178   vnet_feature_constraint_registration_t *r = &vnet_feature_constraint_##x; \
 179   VLIB_REMOVE_FROM_LINKED_LIST (fm->next_constraint, r, next);          \
 180 }                                                                       \
 181 __VA_ARGS__ vnet_feature_constraint_registration_t vnet_feature_constraint_##x
 182
 183 #else
 184 #define VNET_FEATURE_ARC_INIT(x,...)                            \
 185 extern vnet_feature_arc_registration_t __clib_unused vnet_feat_arc_##x; \
 186 static vnet_feature_arc_registration_t __clib_unused __clib_unused_vnet_feat_arc_##x
 187 #define VNET_FEATURE_INIT(x,...)                                \
 188 extern vnet_feature_registration_t __clib_unused vnet_feat_##x; \
 189 static vnet_feature_registration_t __clib_unused __clib_unused_vnet_feat_##x
 190
 191 #define VNET_FEATURE_ARC_ORDER(x,...)                           \
 192 extern vnet_feature_constraint_registration_t                   \
 193 __clib_unused vnet_feature_constraint_##x;                      \
 194 static vnet_feature_constraint_registration_t __clib_unused     \
 195 __clib_unused_vnet_feature_constraint_##x
 196
 197
 198 #endif
 199
 200 void
 201 vnet_config_update_feature_count (vnet_feature_main_t * fm, u8 arc,
 202                                   u32 sw_if_index, int is_add);
 203
 204 u32 vnet_get_feature_index (u8 arc, const char *s);
 205 u8 vnet_get_feature_arc_index (const char *s);
 206 vnet_feature_registration_t *vnet_get_feature_reg (const char *arc_name,
 207                                                    const char *node_name);
 208
 209
 210 int
 211 vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index,
 212                                         u32 sw_if_index, int enable_disable,
 213                                         void *feature_config,
 214                                         u32 n_feature_config_bytes);
 215
 216 int
 217 vnet_feature_enable_disable (const char *arc_name, const char *node_name,
 218                              u32 sw_if_index, int enable_disable,
 219                              void *feature_config,
 220                              u32 n_feature_config_bytes);
 221
 222 static_always_inline u32
 223 vnet_get_feature_count (u8 arc, u32 sw_if_index)
 224 {
 225   vnet_feature_main_t *fm = &feature_main;
 226   return (fm->feature_count_by_sw_if_index[arc][sw_if_index]);
 227 }
 228
 229 static inline vnet_feature_config_main_t *
 230 vnet_get_feature_arc_config_main (u8 arc_index)
 231 {
 232   vnet_feature_main_t *fm = &feature_main;
 233
 234   if (arc_index == (u8) ~ 0)
 235     return 0;
 236
 237   return &fm->feature_config_mains[arc_index];
 238 }
 239
 240 static_always_inline vnet_feature_config_main_t *
 241 vnet_feature_get_config_main (u16 arc)
 242 {
 243   vnet_feature_main_t *fm = &feature_main;
 244   return &fm->feature_config_mains[arc];
 245 }
 246
 247 static_always_inline int
 248 vnet_have_features (u8 arc, u32 sw_if_index)
 249 {
 250   vnet_feature_main_t *fm = &feature_main;
 251   return clib_bitmap_get (fm->sw_if_index_has_features[arc], sw_if_index);
 252 }
 253
 254 static_always_inline u32
 255 vnet_get_feature_config_index (u8 arc, u32 sw_if_index)
 256 {
 257   vnet_feature_main_t *fm = &feature_main;
 258   vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc];
 259   return vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
 260 }
 261
 262 static_always_inline void *
 263 vnet_feature_arc_start_with_data (u8 arc, u32 sw_if_index, u32 * next,
 264                                   vlib_buffer_t * b, u32 n_data_bytes)
 265 {
 266   vnet_feature_main_t *fm = &feature_main;
 267   vnet_feature_config_main_t *cm;
 268   cm = &fm->feature_config_mains[arc];
 269
 270   if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
 271     {
 272       vnet_buffer (b)->feature_arc_index = arc;
 273       b->current_config_index =
 274         vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
 275       return vnet_get_config_data (&cm->config_main, &b->current_config_index,
 276                                    next, n_data_bytes);
 277     }
 278   return 0;
 279 }
 280
 281 static_always_inline void
 282 vnet_feature_arc_start (u8 arc, u32 sw_if_index, u32 * next0,
 283                         vlib_buffer_t * b0)
 284 {
 285   vnet_feature_arc_start_with_data (arc, sw_if_index, next0, b0, 0);
 286 }
 287
 288 static_always_inline void *
 289 vnet_feature_next_with_data (u32 * next0, vlib_buffer_t * b0,
 290                              u32 n_data_bytes)
 291 {
 292   vnet_feature_main_t *fm = &feature_main;
 293   u8 arc = vnet_buffer (b0)->feature_arc_index;
 294   vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc];
 295
 296   return vnet_get_config_data (&cm->config_main,
 297                                &b0->current_config_index, next0,
 298                                n_data_bytes);
 299 }
 300
 301 static_always_inline void
 302 vnet_feature_next (u32 * next0, vlib_buffer_t * b0)
 303 {
 304   vnet_feature_next_with_data (next0, b0, 0);
 305 }
 306
 307 static_always_inline int
 308 vnet_device_input_have_features (u32 sw_if_index)
 309 {
 310   vnet_feature_main_t *fm = &feature_main;
 311   return vnet_have_features (fm->device_input_feature_arc_index, sw_if_index);
 312 }
 313
 314 static_always_inline void
 315 vnet_feature_start_device_input_x1 (u32 sw_if_index, u32 * next0,
 316                                     vlib_buffer_t * b0)
 317 {
 318   vnet_feature_main_t *fm = &feature_main;
 319   vnet_feature_config_main_t *cm;
 320   u8 feature_arc_index = fm->device_input_feature_arc_index;
 321   cm = &fm->feature_config_mains[feature_arc_index];
 322
 323   if (PREDICT_FALSE
 324       (clib_bitmap_get
 325        (fm->sw_if_index_has_features[feature_arc_index], sw_if_index)))
 326     {
 327       /*
 328        * Save next0 so that the last feature in the chain
 329        * can skip ethernet-input if indicated...
 330        */
 331       u16 adv;
 332
 333       adv = device_input_next_node_advance[*next0];
 334       vlib_buffer_advance (b0, -adv);
 335
 336       vnet_buffer (b0)->feature_arc_index = feature_arc_index;
 337       b0->current_config_index =
 338         vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
 339       vnet_get_config_data (&cm->config_main, &b0->current_config_index,
 340                             next0, /* # bytes of config data */ 0);
 341     }
 342 }
 343
 344 static_always_inline void
 345 vnet_feature_start_device_input_x2 (u32 sw_if_index,
 346                                     u32 * next0,
 347                                     u32 * next1,
 348                                     vlib_buffer_t * b0, vlib_buffer_t * b1)
 349 {
 350   vnet_feature_main_t *fm = &feature_main;
 351   vnet_feature_config_main_t *cm;
 352   u8 feature_arc_index = fm->device_input_feature_arc_index;
 353   cm = &fm->feature_config_mains[feature_arc_index];
 354
 355   if (PREDICT_FALSE
 356       (clib_bitmap_get
 357        (fm->sw_if_index_has_features[feature_arc_index], sw_if_index)))
 358     {
 359       /*
 360        * Save next0 so that the last feature in the chain
 361        * can skip ethernet-input if indicated...
 362        */
 363       u16 adv;
 364
 365       adv = device_input_next_node_advance[*next0];
 366       vlib_buffer_advance (b0, -adv);
 367
 368       adv = device_input_next_node_advance[*next1];
 369       vlib_buffer_advance (b1, -adv);
 370
 371       vnet_buffer (b0)->feature_arc_index = feature_arc_index;
 372       vnet_buffer (b1)->feature_arc_index = feature_arc_index;
 373       b0->current_config_index =
 374         vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
 375       b1->current_config_index = b0->current_config_index;
 376       vnet_get_config_data (&cm->config_main, &b0->current_config_index,
 377                             next0, /* # bytes of config data */ 0);
 378       vnet_get_config_data (&cm->config_main, &b1->current_config_index,
 379                             next1, /* # bytes of config data */ 0);
 380     }
 381 }
 382
 383 static_always_inline void
 384 vnet_feature_start_device_input_x4 (u32 sw_if_index,
 385                                     u32 * next0,
 386                                     u32 * next1,
 387                                     u32 * next2,
 388                                     u32 * next3,
 389                                     vlib_buffer_t * b0,
 390                                     vlib_buffer_t * b1,
 391                                     vlib_buffer_t * b2, vlib_buffer_t * b3)
 392 {
 393   vnet_feature_main_t *fm = &feature_main;
 394   vnet_feature_config_main_t *cm;
 395   u8 feature_arc_index = fm->device_input_feature_arc_index;
 396   cm = &fm->feature_config_mains[feature_arc_index];
 397
 398   if (PREDICT_FALSE
 399       (clib_bitmap_get
 400        (fm->sw_if_index_has_features[feature_arc_index], sw_if_index)))
 401     {
 402       /*
 403        * Save next0 so that the last feature in the chain
 404        * can skip ethernet-input if indicated...
 405        */
 406       u16 adv;
 407
 408       adv = device_input_next_node_advance[*next0];
 409       vlib_buffer_advance (b0, -adv);
 410
 411       adv = device_input_next_node_advance[*next1];
 412       vlib_buffer_advance (b1, -adv);
 413
 414       adv = device_input_next_node_advance[*next2];
 415       vlib_buffer_advance (b2, -adv);
 416
 417       adv = device_input_next_node_advance[*next3];
 418       vlib_buffer_advance (b3, -adv);
 419
 420       vnet_buffer (b0)->feature_arc_index = feature_arc_index;
 421       vnet_buffer (b1)->feature_arc_index = feature_arc_index;
 422       vnet_buffer (b2)->feature_arc_index = feature_arc_index;
 423       vnet_buffer (b3)->feature_arc_index = feature_arc_index;
 424
 425       b0->current_config_index =
 426         vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
 427       b1->current_config_index = b0->current_config_index;
 428       b2->current_config_index = b0->current_config_index;
 429       b3->current_config_index = b0->current_config_index;
 430
 431       vnet_get_config_data (&cm->config_main, &b0->current_config_index,
 432                             next0, /* # bytes of config data */ 0);
 433       vnet_get_config_data (&cm->config_main, &b1->current_config_index,
 434                             next1, /* # bytes of config data */ 0);
 435       vnet_get_config_data (&cm->config_main, &b2->current_config_index,
 436                             next2, /* # bytes of config data */ 0);
 437       vnet_get_config_data (&cm->config_main, &b3->current_config_index,
 438                             next3, /* # bytes of config data */ 0);
 439     }
 440 }
 441
 442 #define VNET_FEATURES(...)  (char*[]) { __VA_ARGS__, 0}
 443
 444 clib_error_t *vnet_feature_arc_init
 445   (vlib_main_t * vm,
 446    vnet_config_main_t * vcm,
 447    char **feature_start_nodes,
 448    int num_feature_start_nodes,
 449    char *last_in_arc,
 450    vnet_feature_registration_t * first_reg,
 451    vnet_feature_constraint_registration_t * first_const_set,
 452    char ***in_feature_nodes);
 453
 454 void vnet_interface_features_show (vlib_main_t * vm, u32 sw_if_index,
 455                                    int verbose);
 456
 457 #endif /* included_feature_h */
 458
 459 /*
 460  * fd.io coding-style-patch-verification: ON
 461  *
 462  * Local Variables:
 463  * eval: (c-set-style "gnu")
 464  * End:
 465  */