src/vnet/interface.h

   1 /*
   2  * Copyright (c) 2015 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  * interface.h: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #ifndef included_vnet_interface_h
  41 #define included_vnet_interface_h
  42
  43 #include <vlib/vlib.h>
  44 #include <vppinfra/pcap.h>
  45 #include <vnet/l3_types.h>
  46 #include <vppinfra/lock.h>
  47
  48 struct vnet_main_t;
  49 struct vnet_hw_interface_t;
  50 struct vnet_sw_interface_t;
  51 union ip46_address_t_;
  52
  53 typedef enum
  54 {
  55   VNET_HW_IF_RX_MODE_UNKNOWN,
  56   VNET_HW_IF_RX_MODE_POLLING,
  57   VNET_HW_IF_RX_MODE_INTERRUPT,
  58   VNET_HW_IF_RX_MODE_ADAPTIVE,
  59   VNET_HW_IF_RX_MODE_DEFAULT,
  60   VNET_HW_IF_NUM_RX_MODES,
  61 } vnet_hw_if_rx_mode;
  62
  63 /* Interface up/down callback. */
  64 typedef clib_error_t *(vnet_interface_function_t)
  65   (struct vnet_main_t * vnm, u32 if_index, u32 flags);
  66
  67 /* Sub-interface add/del callback. */
  68 typedef clib_error_t *(vnet_subif_add_del_function_t)
  69   (struct vnet_main_t * vnm, u32 if_index,
  70    struct vnet_sw_interface_t * template, int is_add);
  71
  72 /* Interface set mac address callback. */
  73 typedef clib_error_t *(vnet_interface_set_mac_address_function_t)
  74   (struct vnet_hw_interface_t * hi,
  75    const u8 * old_address, const u8 * new_address);
  76
  77 /* Interface add/del additional mac address callback */
  78 typedef clib_error_t *(vnet_interface_add_del_mac_address_function_t)
  79   (struct vnet_hw_interface_t * hi, const u8 * address, u8 is_add);
  80
  81 /* Interface set rx mode callback. */
  82 typedef clib_error_t *(vnet_interface_set_rx_mode_function_t)
  83   (struct vnet_main_t * vnm, u32 if_index, u32 queue_id,
  84    vnet_hw_if_rx_mode mode);
  85
  86 /* Interface set l2 mode callback. */
  87 typedef clib_error_t *(vnet_interface_set_l2_mode_function_t)
  88   (struct vnet_main_t * vnm, struct vnet_hw_interface_t * hi,
  89    i32 l2_if_adjust);
  90
  91 /* Interface to set rss queues of the interface */
  92 typedef clib_error_t *(vnet_interface_rss_queues_set_t)
  93   (struct vnet_main_t * vnm, struct vnet_hw_interface_t * hi,
  94    clib_bitmap_t * bitmap);
  95
  96 typedef enum
  97 {
  98   VNET_FLOW_DEV_OP_ADD_FLOW,
  99   VNET_FLOW_DEV_OP_DEL_FLOW,
 100   VNET_FLOW_DEV_OP_GET_COUNTER,
 101   VNET_FLOW_DEV_OP_RESET_COUNTER,
 102 } vnet_flow_dev_op_t;
 103
 104 /* Interface flow operations callback. */
 105 typedef int (vnet_flow_dev_ops_function_t) (struct vnet_main_t * vnm,
 106                                             vnet_flow_dev_op_t op,
 107                                             u32 hw_if_index, u32 index,
 108                                             uword * private_data);
 109
 110 typedef enum vnet_interface_function_priority_t_
 111 {
 112   VNET_ITF_FUNC_PRIORITY_LOW,
 113   VNET_ITF_FUNC_PRIORITY_HIGH,
 114 } vnet_interface_function_priority_t;
 115 #define VNET_ITF_FUNC_N_PRIO ((vnet_interface_function_priority_t)VNET_ITF_FUNC_PRIORITY_HIGH+1)
 116
 117 typedef struct _vnet_interface_function_list_elt
 118 {
 119   struct _vnet_interface_function_list_elt *next_interface_function;
 120   clib_error_t *(*fp) (struct vnet_main_t * vnm, u32 if_index, u32 flags);
 121 } _vnet_interface_function_list_elt_t;
 122
 123 #ifndef CLIB_MARCH_VARIANT
 124 #define _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,tag,p)                    \
 125                                                                         \
 126 static void __vnet_interface_function_init_##tag##_##f (void)           \
 127     __attribute__((__constructor__)) ;                                  \
 128                                                                         \
 129 static void __vnet_interface_function_init_##tag##_##f (void)           \
 130 {                                                                       \
 131  vnet_main_t * vnm = vnet_get_main();                                   \
 132  static _vnet_interface_function_list_elt_t init_function;              \
 133  init_function.next_interface_function = vnm->tag##_functions[p];       \
 134  vnm->tag##_functions[p] = &init_function;                              \
 135  init_function.fp = (void *) &f;                                        \
 136 }                                                                       \
 137 static void __vnet_interface_function_deinit_##tag##_##f (void)         \
 138     __attribute__((__destructor__)) ;                                   \
 139                                                                         \
 140 static void __vnet_interface_function_deinit_##tag##_##f (void)         \
 141 {                                                                       \
 142  vnet_main_t * vnm = vnet_get_main();                                   \
 143  _vnet_interface_function_list_elt_t *next;                             \
 144  if (vnm->tag##_functions[p]->fp == f)                                  \
 145     {                                                                   \
 146       vnm->tag##_functions[p] =                                         \
 147         vnm->tag##_functions[p]->next_interface_function;               \
 148       return;                                                           \
 149     }                                                                   \
 150   next = vnm->tag##_functions[p];                                       \
 151   while (next->next_interface_function)                                 \
 152     {                                                                   \
 153       if (next->next_interface_function->fp == f)                       \
 154         {                                                               \
 155           next->next_interface_function =                               \
 156             next->next_interface_function->next_interface_function;     \
 157           return;                                                       \
 158         }                                                               \
 159       next = next->next_interface_function;                             \
 160     }                                                                   \
 161 }
 162 #else
 163 /* create unused pointer to silence compiler warnings and get whole
 164    function optimized out */
 165 #define _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,tag,p)                    \
 166 static __clib_unused void * __clib_unused_##f = f;
 167 #endif
 168
 169 #define _VNET_INTERFACE_FUNCTION_DECL(f,tag)                            \
 170   _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,tag,VNET_ITF_FUNC_PRIORITY_LOW)
 171
 172 #define VNET_HW_INTERFACE_ADD_DEL_FUNCTION(f)                   \
 173   _VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_add_del)
 174 #define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(f)              \
 175   _VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_link_up_down)
 176 #define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(f,p)       \
 177   _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,hw_interface_link_up_down,p)
 178 #define VNET_SW_INTERFACE_MTU_CHANGE_FUNCTION(f)                \
 179   _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_mtu_change)
 180 #define VNET_SW_INTERFACE_ADD_DEL_FUNCTION(f)                   \
 181   _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_add_del)
 182 #define VNET_SW_INTERFACE_ADD_DEL_FUNCTION_PRIO(f,p)            \
 183   _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,sw_interface_add_del,p)
 184 #define VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(f)             \
 185   _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_admin_up_down)
 186 #define VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO(f,p)      \
 187   _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,sw_interface_admin_up_down, p)
 188
 189 /**
 190  * Tunnel description parameters
 191  */
 192 typedef int (*vnet_dev_class_ip_tunnel_desc_t) (u32 sw_if_index,
 193                                                 union ip46_address_t_ * src,
 194                                                 union ip46_address_t_ * dst,
 195                                                 u8 * is_l2);
 196
 197 /* A class of hardware interface devices. */
 198 typedef struct _vnet_device_class
 199 {
 200   /* Index into main vector. */
 201   u32 index;
 202
 203   /* Device name (e.g. "FOOBAR 1234a"). */
 204   char *name;
 205
 206   /* Function to call when hardware interface is added/deleted. */
 207   vnet_interface_function_t *interface_add_del_function;
 208
 209   /* Function to bring device administratively up/down. */
 210   vnet_interface_function_t *admin_up_down_function;
 211
 212   /* Function to call when sub-interface is added/deleted */
 213   vnet_subif_add_del_function_t *subif_add_del_function;
 214
 215   /* Function to call interface rx mode is changed */
 216   vnet_interface_set_rx_mode_function_t *rx_mode_change_function;
 217
 218   /* Function to call interface l2 mode is changed */
 219   vnet_interface_set_l2_mode_function_t *set_l2_mode_function;
 220
 221   /* Redistribute flag changes/existence of this interface class. */
 222   u32 redistribute;
 223
 224   /* Transmit function. */
 225   vlib_node_function_t *tx_function;
 226
 227   /* Transmit function candidate registration with priority */
 228   vlib_node_fn_registration_t *tx_fn_registrations;
 229
 230   /* Error strings indexed by error code for this node. */
 231   char **tx_function_error_strings;
 232   vlib_error_desc_t *tx_function_error_counters;
 233
 234   /* Number of error codes used by this node. */
 235   u32 tx_function_n_errors;
 236
 237   /* Renumber device name [only!] support, a control-plane kludge */
 238   int (*name_renumber) (struct vnet_hw_interface_t * hi,
 239                         u32 new_dev_instance);
 240
 241   /* Interface flow offload operations */
 242   vnet_flow_dev_ops_function_t *flow_ops_function;
 243
 244   /* Format device instance as name. */
 245   format_function_t *format_device_name;
 246
 247   /* Parse function for device name. */
 248   unformat_function_t *unformat_device_name;
 249
 250   /* Format device verbosely for this class. */
 251   format_function_t *format_device;
 252
 253   /* Trace buffer format for TX function. */
 254   format_function_t *format_tx_trace;
 255
 256   /* Format flow offload entry */
 257   format_function_t *format_flow;
 258
 259   vnet_dev_class_ip_tunnel_desc_t ip_tun_desc;
 260
 261   /* Function to clear hardware counters for device. */
 262   void (*clear_counters) (u32 dev_class_instance);
 263
 264     uword (*is_valid_class_for_interface) (struct vnet_main_t * vnm,
 265                                            u32 hw_if_index,
 266                                            u32 hw_class_index);
 267
 268   /* Called when hardware class of an interface changes. */
 269   void (*hw_class_change) (struct vnet_main_t * vnm,
 270                            u32 hw_if_index, u32 new_hw_class_index);
 271
 272   /* Called to redirect traffic from a specific interface instance */
 273   void (*rx_redirect_to_node) (struct vnet_main_t * vnm,
 274                                u32 hw_if_index, u32 node_index);
 275
 276   /* Link-list of all device classes set up by constructors created below */
 277   struct _vnet_device_class *next_class_registration;
 278
 279   /* Function to set mac address. */
 280   vnet_interface_set_mac_address_function_t *mac_addr_change_function;
 281
 282   /* Function to add/delete additional MAC addresses */
 283   vnet_interface_add_del_mac_address_function_t *mac_addr_add_del_function;
 284
 285   /* Interface to set rss queues of the interface */
 286   vnet_interface_rss_queues_set_t *set_rss_queues_function;
 287
 288 } vnet_device_class_t;
 289
 290 #ifndef CLIB_MARCH_VARIANT
 291 #define VNET_DEVICE_CLASS(x,...)                                        \
 292   __VA_ARGS__ vnet_device_class_t x;                                    \
 293 static void __vnet_add_device_class_registration_##x (void)             \
 294     __attribute__((__constructor__)) ;                                  \
 295 static void __vnet_add_device_class_registration_##x (void)             \
 296 {                                                                       \
 297     vnet_main_t * vnm = vnet_get_main();                                \
 298     x.next_class_registration = vnm->device_class_registrations;        \
 299     vnm->device_class_registrations = &x;                               \
 300 }                                                                       \
 301 static void __vnet_rm_device_class_registration_##x (void)              \
 302     __attribute__((__destructor__)) ;                                   \
 303 static void __vnet_rm_device_class_registration_##x (void)              \
 304 {                                                                       \
 305     vnet_main_t * vnm = vnet_get_main();                                \
 306     VLIB_REMOVE_FROM_LINKED_LIST (vnm->device_class_registrations,      \
 307                                   &x, next_class_registration);         \
 308 }                                                                       \
 309 __VA_ARGS__ vnet_device_class_t x
 310 #else
 311 /* create unused pointer to silence compiler warnings and get whole
 312    function optimized out */
 313 #define VNET_DEVICE_CLASS(x,...)                                        \
 314 static __clib_unused vnet_device_class_t __clib_unused_##x
 315 #endif
 316
 317 #define VNET_DEVICE_CLASS_TX_FN(devclass)                                     \
 318   uword CLIB_MARCH_SFX (devclass##_tx_fn) ();                                 \
 319   static vlib_node_fn_registration_t CLIB_MARCH_SFX (                         \
 320     devclass##_tx_fn_registration) = {                                        \
 321     .function = &CLIB_MARCH_SFX (devclass##_tx_fn),                           \
 322   };                                                                          \
 323                                                                               \
 324   static void __clib_constructor CLIB_MARCH_SFX (                             \
 325     devclass##_tx_fn_multiarch_register) (void)                               \
 326   {                                                                           \
 327     extern vnet_device_class_t devclass;                                      \
 328     vlib_node_fn_registration_t *r;                                           \
 329     r = &CLIB_MARCH_SFX (devclass##_tx_fn_registration);                      \
 330     r->march_variant = CLIB_MARCH_SFX (CLIB_MARCH_VARIANT_TYPE);              \
 331     r->next_registration = devclass.tx_fn_registrations;                      \
 332     devclass.tx_fn_registrations = r;                                         \
 333   }                                                                           \
 334   uword CLIB_MARCH_SFX (devclass##_tx_fn)
 335
 336 /**
 337  * Link Type: A description of the protocol of packets on the link.
 338  * On an ethernet link this maps directly into the ethertype. On a GRE tunnel
 339  * it maps to the GRE-proto, etc for other lnk types.
 340  */
 341 typedef enum vnet_link_t_
 342 {
 343 #if CLIB_DEBUG > 0
 344   VNET_LINK_IP4 = 1,
 345 #else
 346   VNET_LINK_IP4 = 0,
 347 #endif
 348   VNET_LINK_IP6,
 349   VNET_LINK_MPLS,
 350   VNET_LINK_ETHERNET,
 351   VNET_LINK_ARP,
 352   VNET_LINK_NSH,
 353 } __attribute__ ((packed)) vnet_link_t;
 354
 355 #define VNET_LINKS {                   \
 356     [VNET_LINK_ETHERNET] = "ethernet", \
 357     [VNET_LINK_IP4] = "ipv4",          \
 358     [VNET_LINK_IP6] = "ipv6",          \
 359     [VNET_LINK_MPLS] = "mpls",         \
 360     [VNET_LINK_ARP] = "arp",           \
 361     [VNET_LINK_NSH] = "nsh",           \
 362 }
 363
 364 #define FOR_EACH_VNET_LINK(_link)    \
 365   for (_link = VNET_LINK_IP4;        \
 366        _link <= VNET_LINK_NSH;       \
 367        _link++)
 368
 369 #define FOR_EACH_VNET_IP_LINK(_link)    \
 370   for (_link = VNET_LINK_IP4;           \
 371        _link <= VNET_LINK_IP6;          \
 372        _link++)
 373
 374 /**
 375  * @brief Number of link types. Not part of the enum so it does not have to be
 376  * included in switch statements
 377  */
 378 #define VNET_LINK_NUM (VNET_LINK_NSH+1)
 379 #define VNET_N_LINKS VNET_LINK_NUM
 380
 381 /**
 382  * @brief Convert a link to to an Ethertype
 383  */
 384 extern vnet_l3_packet_type_t vnet_link_to_l3_proto (vnet_link_t link);
 385
 386 /**
 387  * @brief Attributes assignable to a HW interface Class.
 388  */
 389 typedef enum vnet_hw_interface_class_flags_t_
 390 {
 391   /**
 392    * @brief a point 2 point interface
 393    */
 394   VNET_HW_INTERFACE_CLASS_FLAG_P2P = (1 << 0),
 395   /**
 396    * @brief a non-broadcast multiple access interface
 397    */
 398   VNET_HW_INTERFACE_CLASS_FLAG_NBMA = (1 << 1),
 399 } vnet_hw_interface_class_flags_t;
 400
 401 /* Layer-2 (e.g. Ethernet) interface class. */
 402 typedef struct _vnet_hw_interface_class
 403 {
 404   /* Index into main vector. */
 405   u32 index;
 406
 407   /* Class name (e.g. "Ethernet"). */
 408   char *name;
 409
 410   /* Flags */
 411   vnet_hw_interface_class_flags_t flags;
 412
 413   /* Function to call when hardware interface is added/deleted. */
 414   vnet_interface_function_t *interface_add_del_function;
 415
 416   /* Function to bring interface administratively up/down. */
 417   vnet_interface_function_t *admin_up_down_function;
 418
 419   /* Function to call when link state changes. */
 420   vnet_interface_function_t *link_up_down_function;
 421
 422   /* Function to call when link MAC changes. */
 423   vnet_interface_set_mac_address_function_t *mac_addr_change_function;
 424
 425   /* Function to add/delete additional MAC addresses */
 426   vnet_interface_add_del_mac_address_function_t *mac_addr_add_del_function;
 427
 428   /* Format function to display interface name. */
 429   format_function_t *format_interface_name;
 430
 431   /* Format function to display interface address. */
 432   format_function_t *format_address;
 433
 434   /* Format packet header for this interface class. */
 435   format_function_t *format_header;
 436
 437   /* Format device verbosely for this class. */
 438   format_function_t *format_device;
 439
 440   /* Parser for hardware (e.g. ethernet) address. */
 441   unformat_function_t *unformat_hw_address;
 442
 443   /* Parser for packet header for e.g. rewrite string. */
 444   unformat_function_t *unformat_header;
 445
 446   /* Builds a rewrite string for the interface to the destination
 447    * for the payload/link type. */
 448   u8 *(*build_rewrite) (struct vnet_main_t * vnm,
 449                         u32 sw_if_index,
 450                         vnet_link_t link_type, const void *dst_hw_address);
 451
 452   /* Update an adjacency added by FIB (as opposed to via the
 453    * neighbour resolution protocol). */
 454   void (*update_adjacency) (struct vnet_main_t * vnm,
 455                             u32 sw_if_index, u32 adj_index);
 456
 457     uword (*is_valid_class_for_interface) (struct vnet_main_t * vnm,
 458                                            u32 hw_if_index,
 459                                            u32 hw_class_index);
 460
 461   /* Called when hw interface class is changed and old hardware instance
 462      may want to be deleted. */
 463   void (*hw_class_change) (struct vnet_main_t * vnm, u32 hw_if_index,
 464                            u32 old_class_index, u32 new_class_index);
 465
 466   /* List of hw interface classes, built by constructors */
 467   struct _vnet_hw_interface_class *next_class_registration;
 468
 469 } vnet_hw_interface_class_t;
 470
 471 /**
 472  * @brief Return a complete, zero-length (aka placeholder) rewrite
 473  */
 474 extern u8 *default_build_rewrite (struct vnet_main_t *vnm,
 475                                   u32 sw_if_index,
 476                                   vnet_link_t link_type,
 477                                   const void *dst_hw_address);
 478
 479 /**
 480  * @brief Default adjacency update function
 481  */
 482 extern void default_update_adjacency (struct vnet_main_t *vnm,
 483                                       u32 sw_if_index, u32 adj_index);
 484
 485 #define VNET_HW_INTERFACE_CLASS(x,...)                                  \
 486   __VA_ARGS__ vnet_hw_interface_class_t x;                              \
 487 static void __vnet_add_hw_interface_class_registration_##x (void)       \
 488     __attribute__((__constructor__)) ;                                  \
 489 static void __vnet_add_hw_interface_class_registration_##x (void)       \
 490 {                                                                       \
 491     vnet_main_t * vnm = vnet_get_main();                                \
 492     x.next_class_registration = vnm->hw_interface_class_registrations;  \
 493     vnm->hw_interface_class_registrations = &x;                         \
 494 }                                                                       \
 495 static void __vnet_rm_hw_interface_class_registration_##x (void)        \
 496     __attribute__((__destructor__)) ;                                   \
 497 static void __vnet_rm_hw_interface_class_registration_##x (void)        \
 498 {                                                                       \
 499     vnet_main_t * vnm = vnet_get_main();                                \
 500     VLIB_REMOVE_FROM_LINKED_LIST (vnm->hw_interface_class_registrations,\
 501                                   &x, next_class_registration);         \
 502 }                                                                       \
 503 __VA_ARGS__ vnet_hw_interface_class_t x
 504
 505 typedef enum vnet_hw_interface_flags_t_
 506 {
 507   VNET_HW_INTERFACE_FLAG_NONE,
 508   /* Hardware link state is up. */
 509   VNET_HW_INTERFACE_FLAG_LINK_UP = (1 << 0),
 510   /* Hardware duplex state */
 511   VNET_HW_INTERFACE_FLAG_HALF_DUPLEX = (1 << 1),
 512   VNET_HW_INTERFACE_FLAG_FULL_DUPLEX = (1 << 2),
 513
 514   /* non-broadcast multiple access */
 515   VNET_HW_INTERFACE_FLAG_NBMA = (1 << 19),
 516 } vnet_hw_interface_flags_t;
 517
 518 typedef enum vnet_hw_interface_capabilities_t_
 519 {
 520   VNET_HW_INTERFACE_CAP_NONE,
 521
 522   /* tx checksum offload */
 523   VNET_HW_INTERFACE_CAP_SUPPORTS_TX_IP4_CKSUM = (1 << 0),
 524   VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM = (1 << 1),
 525   VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM = (1 << 2),
 526   VNET_HW_INTERFACE_CAP_SUPPORTS_TX_IP4_OUTER_CKSUM = (1 << 3),
 527   VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_OUTER_CKSUM = (1 << 4),
 528
 529   /* rx checksum offload */
 530   VNET_HW_INTERFACE_CAP_SUPPORTS_RX_IP4_CKSUM = (1 << 5),
 531   VNET_HW_INTERFACE_CAP_SUPPORTS_RX_UDP_CKSUM = (1 << 6),
 532   VNET_HW_INTERFACE_CAP_SUPPORTS_RX_TCP_CKSUM = (1 << 7),
 533   VNET_HW_INTERFACE_CAP_SUPPORTS_RX_IP4_OUTER_CKSUM = (1 << 8),
 534   VNET_HW_INTERFACE_CAP_SUPPORTS_RX_UDP_OUTER_CKSUM = (1 << 9),
 535
 536   /* gso */
 537   VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO = (1 << 10),
 538   VNET_HW_INTERFACE_CAP_SUPPORTS_UDP_GSO = (1 << 11),
 539   VNET_HW_INTERFACE_CAP_SUPPORTS_VXLAN_TNL_GSO = (1 << 12),
 540   VNET_HW_INTERFACE_CAP_SUPPORTS_IPIP_TNL_GSO = (1 << 13),
 541   VNET_HW_INTERFACE_CAP_SUPPORTS_GENEVE_TNL_GSO = (1 << 14),
 542   VNET_HW_INTERFACE_CAP_SUPPORTS_GRE_TNL_GSO = (1 << 15),
 543   VNET_HW_INTERFACE_CAP_SUPPORTS_UDP_TNL_GSO = (1 << 16),
 544   VNET_HW_INTERFACE_CAP_SUPPORTS_IP_TNL_GSO = (1 << 17),
 545
 546   /* lro */
 547   VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_LRO = (1 << 18),
 548
 549   /* rx mode */
 550   VNET_HW_INTERFACE_CAP_SUPPORTS_INT_MODE = (1 << 30),
 551   /* hw/driver can switch between l2-promisc and l3-dmac-filter modes */
 552   VNET_HW_INTERFACE_CAP_SUPPORTS_MAC_FILTER = (1 << 31),
 553 } vnet_hw_interface_capabilities_t;
 554
 555 #define VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM                            \
 556   (VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM |                              \
 557    VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM)
 558
 559 #define VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM                               \
 560   (VNET_HW_INTERFACE_CAP_SUPPORTS_TX_IP4_CKSUM |                              \
 561    VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM |                              \
 562    VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM)
 563
 564 #define VNET_HW_INTERFACE_CAP_SUPPORTS_L4_RX_CKSUM                            \
 565   (VNET_HW_INTERFACE_CAP_SUPPORTS_RX_TCP_CKSUM |                              \
 566    VNET_HW_INTERFACE_CAP_SUPPORTS_RX_UDP_CKSUM)
 567
 568 #define VNET_HW_INTERFACE_CAP_SUPPORTS_RX_CKSUM                               \
 569   (VNET_HW_INTERFACE_CAP_SUPPORTS_RX_IP4_CKSUM |                              \
 570    VNET_HW_INTERFACE_CAP_SUPPORTS_RX_TCP_CKSUM |                              \
 571    VNET_HW_INTERFACE_CAP_SUPPORTS_RX_UDP_CKSUM)
 572
 573 #define VNET_HW_INTERFACE_FLAG_DUPLEX_SHIFT 1
 574 #define VNET_HW_INTERFACE_FLAG_SPEED_SHIFT  3
 575 #define VNET_HW_INTERFACE_FLAG_DUPLEX_MASK      \
 576   (VNET_HW_INTERFACE_FLAG_HALF_DUPLEX |         \
 577    VNET_HW_INTERFACE_FLAG_FULL_DUPLEX)
 578
 579 typedef struct
 580 {
 581   /* hw interface index */
 582   u32 hw_if_index;
 583
 584   /* device instance */
 585   u32 dev_instance;
 586
 587   /* index of thread pollling this queue */
 588   u32 thread_index;
 589
 590   /* file index of queue interrupt line */
 591   u32 file_index;
 592
 593   /* hardware queue identifier */
 594   u32 queue_id;
 595
 596   /* mode */
 597   vnet_hw_if_rx_mode mode : 8;
 598 #define VNET_HW_IF_RXQ_THREAD_ANY      ~0
 599 #define VNET_HW_IF_RXQ_NO_RX_INTERRUPT ~0
 600 } vnet_hw_if_rx_queue_t;
 601
 602 typedef struct
 603 {
 604   u8 shared_queue : 1;
 605   /* hw interface index */
 606   u32 hw_if_index;
 607
 608   /* hardware queue identifier */
 609   u32 queue_id;
 610
 611   /* bitmap of threads which use this queue */
 612   clib_bitmap_t *threads;
 613 } vnet_hw_if_tx_queue_t;
 614
 615 typedef enum
 616 {
 617   VNET_HW_IF_TX_FRAME_HINT_NOT_CHAINED = (1 << 0),
 618   VNET_HW_IF_TX_FRAME_HINT_NO_GSO = (1 << 1),
 619   VNET_HW_IF_TX_FRAME_HINT_NO_CKSUM_OFFLOAD = (1 << 2),
 620 } vnet_hw_if_tx_frame_hint_t;
 621
 622 typedef struct
 623 {
 624   u8 shared_queue : 1;
 625   vnet_hw_if_tx_frame_hint_t hints : 16;
 626   u32 queue_id;
 627 } vnet_hw_if_tx_frame_t;
 628
 629 typedef struct
 630 {
 631   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
 632   vnet_hw_if_tx_frame_t frame;
 633   u32 n_threads;
 634 } vnet_hw_if_output_node_runtime_t;
 635
 636 /* Hardware-interface.  This corresponds to a physical wire
 637    that packets flow over. */
 638 typedef struct vnet_hw_interface_t
 639 {
 640   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
 641   /* flags */
 642   vnet_hw_interface_flags_t flags;
 643
 644   /* capabilities flags */
 645   vnet_hw_interface_capabilities_t caps;
 646
 647   /* Hardware address as vector.  Zero (e.g. zero-length vector) if no
 648      address for this class (e.g. PPP). */
 649   u8 *hw_address;
 650
 651   /* Interface is up as far as software is concerned. */
 652   /* NAME.{output,tx} nodes for this interface. */
 653   u32 output_node_index, tx_node_index;
 654
 655   /* interface-output-arc-end node next index for tx node */
 656   u32 if_out_arc_end_node_next_index;
 657
 658   /* (dev_class, dev_instance) uniquely identifies hw interface. */
 659   u32 dev_class_index;
 660   u32 dev_instance;
 661
 662   /* (hw_class, hw_instance) uniquely identifies hw interface. */
 663   u32 hw_class_index;
 664   u32 hw_instance;
 665
 666   /* Hardware index for this hardware interface. */
 667   u32 hw_if_index;
 668
 669   /* Software index for this hardware interface. */
 670   u32 sw_if_index;
 671
 672   /* per thread output-node runtimes */
 673   vnet_hw_if_output_node_runtime_t *output_node_thread_runtimes;
 674
 675   CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
 676
 677   /* Interface name. */
 678   u8 *name;
 679
 680   /* link speed in kbps */
 681   u32 link_speed;
 682
 683   /* Next index in interface-output node for this interface
 684      used by node function vnet_per_buffer_interface_output() */
 685   u32 output_node_next_index;
 686
 687   /* Maximum transmit rate for this interface in bits/sec. */
 688   f64 max_rate_bits_per_sec;
 689
 690   /* Smallest packet size supported by this interface. */
 691   u32 min_supported_packet_bytes;
 692
 693   /* Largest packet size supported by this interface. */
 694   u32 max_supported_packet_bytes;
 695
 696   /* Smallest packet size for this interface. */
 697   u32 min_packet_bytes;
 698
 699   /* Largest packet size for this interface. */
 700   u32 max_packet_bytes;
 701
 702   /* Hash table mapping sub interface id to sw_if_index. */
 703   uword *sub_interface_sw_if_index_by_id;
 704
 705   /* Count of number of L2 and L3 subinterfaces */
 706   u32 l2_if_count;
 707   u32 l3_if_count;
 708
 709   /* Bonded interface info -
 710      0       - not a bonded interface nor a slave
 711      ~0      - slave to a bonded interface
 712      others  - A bonded interface with a pointer to bitmap for all slaves */
 713   uword *bond_info;
 714 #define VNET_HW_INTERFACE_BOND_INFO_NONE ((uword *) 0)
 715 #define VNET_HW_INTERFACE_BOND_INFO_SLAVE ((uword *) ~0)
 716
 717   /* Input node */
 718   u32 input_node_index;
 719
 720   vnet_hw_if_rx_mode default_rx_mode;
 721
 722   /* rx queues */
 723   u32 *rx_queue_indices;
 724
 725   /* tx queues */
 726   u32 *tx_queue_indices;
 727
 728   /* numa node that hardware device connects to */
 729   u8 numa_node;
 730
 731   /* rss queues bitmap */
 732   clib_bitmap_t *rss_queues;
 733
 734   /* trace */
 735   i32 n_trace;
 736
 737   u32 trace_classify_table_index;
 738 } vnet_hw_interface_t;
 739
 740 STATIC_ASSERT_OFFSET_OF (vnet_hw_interface_t, cacheline1,
 741                          CLIB_CACHE_LINE_BYTES);
 742
 743 typedef struct
 744 {
 745   u32 dev_instance;
 746   u32 queue_id;
 747 } vnet_hw_if_rxq_poll_vector_t;
 748
 749 typedef struct
 750 {
 751   vnet_hw_if_rxq_poll_vector_t *rxq_vector_int;
 752   vnet_hw_if_rxq_poll_vector_t *rxq_vector_poll;
 753   void *rxq_interrupts;
 754 } vnet_hw_if_rx_node_runtime_t;
 755
 756 extern vnet_device_class_t vnet_local_interface_device_class;
 757
 758 typedef enum
 759 {
 760   /* A hw interface. */
 761   VNET_SW_INTERFACE_TYPE_HARDWARE,
 762
 763   /* A sub-interface. */
 764   VNET_SW_INTERFACE_TYPE_SUB,
 765   VNET_SW_INTERFACE_TYPE_P2P,
 766   VNET_SW_INTERFACE_TYPE_PIPE,
 767 } vnet_sw_interface_type_t;
 768
 769 typedef struct
 770 {
 771   /*
 772    * Subinterface ID. A number 0-N to uniquely identify
 773    * this subinterface under the main (parent?) interface
 774    */
 775   u32 id;
 776
 777   /* Classification data. Used to associate packet header with subinterface. */
 778   struct
 779   {
 780     u16 outer_vlan_id;
 781     u16 inner_vlan_id;
 782     union
 783     {
 784       u16 raw_flags;
 785       struct
 786       {
 787         u16 no_tags:1;
 788         u16 one_tag:1;
 789         u16 two_tags:1;
 790         u16 dot1ad:1;           /* 0 = dot1q, 1=dot1ad */
 791         u16 exact_match:1;
 792         u16 default_sub:1;
 793         u16 outer_vlan_id_any:1;
 794         u16 inner_vlan_id_any:1;
 795       } flags;
 796     };
 797   } eth;
 798 } vnet_sub_interface_t;
 799
 800 typedef struct
 801 {
 802   /*
 803    * Subinterface ID. A number 0-N to uniquely identify
 804    * this subinterface under the main interface
 805    */
 806   u32 id;
 807   u32 pool_index;
 808   u8 client_mac[6];
 809 } vnet_p2p_sub_interface_t;
 810
 811 typedef enum
 812 {
 813   /* THe BVI interface */
 814   VNET_FLOOD_CLASS_BVI,
 815   /* Always flood */
 816   VNET_FLOOD_CLASS_NORMAL,
 817   VNET_FLOOD_CLASS_TUNNEL_MASTER,
 818   /* Does not flood when tunnel master is in the same L2 BD */
 819   VNET_FLOOD_CLASS_TUNNEL_NORMAL,
 820   /* Never flood to this type */
 821   VNET_FLOOD_CLASS_NO_FLOOD,
 822 } vnet_flood_class_t;
 823
 824 /* Per protocol MTU */
 825 typedef enum
 826 {
 827   VNET_MTU_L3,                  /* Default payload MTU (without L2 headers) */
 828   VNET_MTU_IP4,                 /* Per-protocol MTUs overriding default */
 829   VNET_MTU_IP6,
 830   VNET_MTU_MPLS,
 831   VNET_N_MTU
 832 } vnet_mtu_t;
 833
 834 extern vnet_mtu_t vnet_link_to_mtu (vnet_link_t link);
 835
 836 typedef enum vnet_sw_interface_flags_t_
 837 {
 838   VNET_SW_INTERFACE_FLAG_NONE = 0,
 839   /* Interface is "up" meaning administratively up.
 840      Up in the sense of link state being up is maintained by hardware interface. */
 841   VNET_SW_INTERFACE_FLAG_ADMIN_UP = (1 << 0),
 842
 843   /* Interface is disabled for forwarding: punt all traffic to slow-path. */
 844   VNET_SW_INTERFACE_FLAG_PUNT = (1 << 1),
 845
 846   __VNET_SW_INTERFACE_FLAG_UNSUED = (1 << 2),
 847
 848   VNET_SW_INTERFACE_FLAG_UNNUMBERED = (1 << 3),
 849
 850   __VNET_SW_INTERFACE_FLAG_UNUSED2 = (1 << 4),
 851
 852   /* Interface does not appear in CLI/API */
 853   VNET_SW_INTERFACE_FLAG_HIDDEN = (1 << 5),
 854
 855   /* Interface in ERROR state */
 856   VNET_SW_INTERFACE_FLAG_ERROR = (1 << 6),
 857
 858   /* Interface has IP configured directed broadcast */
 859   VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST = (1 << 7),
 860
 861 } __attribute__ ((packed)) vnet_sw_interface_flags_t;
 862
 863 /* Software-interface.  This corresponds to a Ethernet VLAN, ATM vc, a
 864    tunnel, etc.  Configuration (e.g. IP address) gets attached to
 865    software interface. */
 866 typedef struct
 867 {
 868   vnet_sw_interface_type_t type:16;
 869
 870   vnet_sw_interface_flags_t flags;
 871
 872   /* Index for this interface. */
 873   u32 sw_if_index;
 874
 875   /* Software interface index of super-interface;
 876      equal to sw_if_index if this interface is not a
 877      sub-interface. */
 878   u32 sup_sw_if_index;
 879
 880   /* this swif is unnumbered, use addresses on unnumbered_sw_if_index... */
 881   u32 unnumbered_sw_if_index;
 882
 883   /* VNET_SW_INTERFACE_TYPE_HARDWARE. */
 884   u32 hw_if_index;
 885
 886   /* MTU for network layer (not including L2 headers) */
 887   u32 mtu[VNET_N_MTU];
 888
 889   /* VNET_SW_INTERFACE_TYPE_SUB. */
 890   vnet_sub_interface_t sub;
 891
 892   /* VNET_SW_INTERFACE_TYPE_P2P. */
 893   vnet_p2p_sub_interface_t p2p;
 894
 895   vnet_flood_class_t flood_class;
 896 } vnet_sw_interface_t;
 897
 898 typedef enum
 899 {
 900   /* Simple counters. */
 901   VNET_INTERFACE_COUNTER_DROP = 0,
 902   VNET_INTERFACE_COUNTER_PUNT = 1,
 903   VNET_INTERFACE_COUNTER_IP4 = 2,
 904   VNET_INTERFACE_COUNTER_IP6 = 3,
 905   VNET_INTERFACE_COUNTER_RX_NO_BUF = 4,
 906   VNET_INTERFACE_COUNTER_RX_MISS = 5,
 907   VNET_INTERFACE_COUNTER_RX_ERROR = 6,
 908   VNET_INTERFACE_COUNTER_TX_ERROR = 7,
 909   VNET_INTERFACE_COUNTER_MPLS = 8,
 910   VNET_N_SIMPLE_INTERFACE_COUNTER = 9,
 911   /* Combined counters. */
 912   VNET_INTERFACE_COUNTER_RX = 0,
 913   VNET_INTERFACE_COUNTER_RX_UNICAST = 1,
 914   VNET_INTERFACE_COUNTER_RX_MULTICAST = 2,
 915   VNET_INTERFACE_COUNTER_RX_BROADCAST = 3,
 916   VNET_INTERFACE_COUNTER_TX = 4,
 917   VNET_INTERFACE_COUNTER_TX_UNICAST = 5,
 918   VNET_INTERFACE_COUNTER_TX_MULTICAST = 6,
 919   VNET_INTERFACE_COUNTER_TX_BROADCAST = 7,
 920   VNET_N_COMBINED_INTERFACE_COUNTER = 8,
 921 } vnet_interface_counter_type_t;
 922
 923 #define foreach_rx_combined_interface_counter(_x)               \
 924   for (_x = VNET_INTERFACE_COUNTER_RX;                          \
 925        _x <= VNET_INTERFACE_COUNTER_RX_BROADCAST;               \
 926        _x++)
 927
 928 #define foreach_tx_combined_interface_counter(_x)               \
 929   for (_x = VNET_INTERFACE_COUNTER_TX;                          \
 930        _x <= VNET_INTERFACE_COUNTER_TX_BROADCAST;               \
 931        _x++)
 932
 933 #define foreach_simple_interface_counter_name   \
 934   _(DROP, drops, if)                            \
 935   _(PUNT, punt, if)                             \
 936   _(IP4, ip4, if)                               \
 937   _(IP6, ip6, if)                               \
 938   _(RX_NO_BUF, rx-no-buf, if)                   \
 939   _(RX_MISS, rx-miss, if)                       \
 940   _(RX_ERROR, rx-error, if)                     \
 941   _(TX_ERROR, tx-error, if)         \
 942   _(MPLS, mpls, if)
 943
 944 #define foreach_combined_interface_counter_name \
 945   _(RX, rx, if)                                 \
 946   _(RX_UNICAST, rx-unicast, if)                 \
 947   _(RX_MULTICAST, rx-multicast, if)             \
 948   _(RX_BROADCAST, rx-broadcast, if)             \
 949   _(TX, tx, if)                                 \
 950   _(TX_UNICAST, tx-unicast, if)                 \
 951   _(TX_MULTICAST, tx-multicast, if)             \
 952   _(TX_BROADCAST, tx-broadcast, if)
 953
 954 typedef enum
 955 {
 956   COLLECT_SIMPLE_STATS = 0,
 957   COLLECT_DETAILED_STATS = 1,
 958 } vnet_interface_stats_collection_mode_e;
 959
 960 extern int collect_detailed_interface_stats_flag;
 961
 962 static inline int
 963 collect_detailed_interface_stats (void)
 964 {
 965   return collect_detailed_interface_stats_flag;
 966 }
 967
 968 void collect_detailed_interface_stats_flag_set (void);
 969 void collect_detailed_interface_stats_flag_clear (void);
 970
 971
 972 typedef struct
 973 {
 974   u32 output_node_index;
 975   u32 tx_node_index;
 976 } vnet_hw_interface_nodes_t;
 977
 978 typedef struct
 979 {
 980   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
 981   u32 *split_buffers;
 982 } vnet_interface_per_thread_data_t;
 983
 984 typedef u8 *(*vnet_buffer_opquae_formatter_t) (const vlib_buffer_t * b,
 985                                                u8 * s);
 986
 987 typedef struct
 988 {
 989   /* Hardware interfaces. */
 990   vnet_hw_interface_t *hw_interfaces;
 991
 992   /* Hardware interface RX queues */
 993   vnet_hw_if_rx_queue_t *hw_if_rx_queues;
 994   uword *rxq_index_by_hw_if_index_and_queue_id;
 995
 996   /* Hardware interface TX queues */
 997   vnet_hw_if_tx_queue_t *hw_if_tx_queues;
 998   uword *txq_index_by_hw_if_index_and_queue_id;
 999
1000   /* Hash table mapping HW interface name to index. */
1001   uword *hw_interface_by_name;
1002
1003   /* Vectors if hardware interface classes and device classes. */
1004   vnet_hw_interface_class_t *hw_interface_classes;
1005   vnet_device_class_t *device_classes;
1006
1007   /* Hash table mapping name to hw interface/device class. */
1008   uword *hw_interface_class_by_name;
1009   uword *device_class_by_name;
1010
1011   /* Software interfaces. */
1012   vnet_sw_interface_t *sw_interfaces;
1013
1014   /* Hash table mapping sub intfc sw_if_index by sup sw_if_index and sub id */
1015   uword *sw_if_index_by_sup_and_sub;
1016
1017   /* Software interface counters both simple and combined
1018      packet and byte counters. */
1019   clib_spinlock_t sw_if_counter_lock;
1020   vlib_simple_counter_main_t *sw_if_counters;
1021   vlib_combined_counter_main_t *combined_sw_if_counters;
1022
1023   vnet_hw_interface_nodes_t *deleted_hw_interface_nodes;
1024
1025   /*
1026    * pcap drop tracing
1027    * Only the drop filter hash lives here. See ../src/vlib/main.h for
1028    * the rest of the variables.
1029    */
1030   uword *pcap_drop_filter_hash;
1031
1032   /* Buffer metadata format helper functions */
1033   vnet_buffer_opquae_formatter_t *buffer_opaque_format_helpers;
1034   vnet_buffer_opquae_formatter_t *buffer_opaque2_format_helpers;
1035
1036   /* per-thread data */
1037   vnet_interface_per_thread_data_t *per_thread_data;
1038
1039   /* feature_arc_index */
1040   u8 output_feature_arc_index;
1041
1042   /* fast lookup tables */
1043   u32 *hw_if_index_by_sw_if_index;
1044   u16 *if_out_arc_end_next_index_by_sw_if_index;
1045 } vnet_interface_main_t;
1046
1047 static inline void
1048 vnet_interface_counter_lock (vnet_interface_main_t * im)
1049 {
1050   if (im->sw_if_counter_lock)
1051     clib_spinlock_lock (&im->sw_if_counter_lock);
1052 }
1053
1054 static inline void
1055 vnet_interface_counter_unlock (vnet_interface_main_t * im)
1056 {
1057   if (im->sw_if_counter_lock)
1058     clib_spinlock_unlock (&im->sw_if_counter_lock);
1059 }
1060
1061 void vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add);
1062
1063 int vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance);
1064
1065 void vnet_register_format_buffer_opaque_helper
1066   (vnet_buffer_opquae_formatter_t fn);
1067
1068 void vnet_register_format_buffer_opaque2_helper
1069   (vnet_buffer_opquae_formatter_t fn);
1070
1071 typedef struct
1072 {
1073   u8 *filename;
1074   int enable;
1075   int status;
1076   u32 packets_to_capture;
1077   u32 max_bytes_per_pkt;
1078   u8 rx_enable;
1079   u8 tx_enable;
1080   u8 drop_enable;
1081   u8 preallocate_data;
1082   u8 free_data;
1083   u32 sw_if_index;
1084   int filter;
1085   vlib_error_t drop_err;
1086 } vnet_pcap_dispatch_trace_args_t;
1087
1088 int vnet_pcap_dispatch_trace_configure (vnet_pcap_dispatch_trace_args_t *);
1089
1090 extern vlib_node_registration_t vnet_interface_output_node;
1091 extern vlib_node_registration_t vnet_interface_output_arc_end_node;
1092
1093 #endif /* included_vnet_interface_h */
1094
1095 /*
1096  * fd.io coding-style-patch-verification: ON
1097  *
1098  * Local Variables:
1099  * eval: (c-set-style "gnu")
1100  * End:
1101  */