src/network/tc/tclass.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later
   2  * Copyright © 2019 VMware, Inc. */
   3 #pragma once
   4
   5 #include "conf-parser.h"
   6 #include "networkd-link.h"
   7 #include "networkd-network.h"
   8 #include "networkd-util.h"
   9 #include "tc.h"
  10
  11 typedef enum TClassKind {
  12         TCLASS_KIND_DRR,
  13         TCLASS_KIND_HTB,
  14         TCLASS_KIND_QFQ,
  15         _TCLASS_KIND_MAX,
  16         _TCLASS_KIND_INVALID = -1,
  17 } TClassKind;
  18
  19 typedef struct TClass {
  20         TrafficControl meta;
  21
  22         NetworkConfigSection *section;
  23         Network *network;
  24
  25         uint32_t classid;
  26         uint32_t parent;
  27
  28         TClassKind kind;
  29 } TClass;
  30
  31 typedef struct TClassVTable {
  32         size_t object_size;
  33         const char *tca_kind;
  34         /* called in tclass_new() */
  35         int (*init)(TClass *tclass);
  36         int (*fill_message)(Link *link, TClass *tclass, sd_netlink_message *m);
  37         int (*verify)(TClass *tclass);
  38 } TClassVTable;
  39
  40 extern const TClassVTable * const tclass_vtable[_TCLASS_KIND_MAX];
  41
  42 #define TCLASS_VTABLE(t) ((t)->kind != _TCLASS_KIND_INVALID ? tclass_vtable[(t)->kind] : NULL)
  43
  44 /* For casting a tclass into the various tclass kinds */
  45 #define DEFINE_TCLASS_CAST(UPPERCASE, MixedCase)                          \
  46         static inline MixedCase* TCLASS_TO_##UPPERCASE(TClass *t) {       \
  47                 if (_unlikely_(!t || t->kind != TCLASS_KIND_##UPPERCASE)) \
  48                         return NULL;                                      \
  49                                                                           \
  50                 return (MixedCase*) t;                                    \
  51         }
  52
  53 /* For casting the various tclass kinds into a tclass */
  54 #define TCLASS(t) (&(t)->meta)
  55
  56 void tclass_free(TClass *tclass);
  57 int tclass_new_static(TClassKind kind, Network *network, const char *filename, unsigned section_line, TClass **ret);
  58
  59 int tclass_configure(Link *link, TClass *tclass);
  60 int tclass_section_verify(TClass *tclass);
  61
  62 DEFINE_NETWORK_SECTION_FUNCTIONS(TClass, tclass_free);
  63
  64 DEFINE_TC_CAST(TCLASS, TClass);
  65
  66 CONFIG_PARSER_PROTOTYPE(config_parse_tclass_parent);
  67 CONFIG_PARSER_PROTOTYPE(config_parse_tclass_classid);
  68
  69 #include "drr.h"
  70 #include "htb.h"
  71 #include "qfq.h"