src/network/netdev/netdev.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "sd-netlink.h"
   5
   6 #include "conf-parser.h"
   7 #include "list.h"
   8 #include "../networkd-link.h"
   9 #include "time-util.h"
  10
  11 typedef struct netdev_join_callback netdev_join_callback;
  12
  13 struct netdev_join_callback {
  14         link_netlink_message_handler_t callback;
  15         Link *link;
  16
  17         LIST_FIELDS(netdev_join_callback, callbacks);
  18 };
  19
  20 typedef enum NetDevKind {
  21         NETDEV_KIND_BRIDGE,
  22         NETDEV_KIND_BOND,
  23         NETDEV_KIND_VLAN,
  24         NETDEV_KIND_MACVLAN,
  25         NETDEV_KIND_MACVTAP,
  26         NETDEV_KIND_IPVLAN,
  27         NETDEV_KIND_IPVTAP,
  28         NETDEV_KIND_VXLAN,
  29         NETDEV_KIND_IPIP,
  30         NETDEV_KIND_GRE,
  31         NETDEV_KIND_GRETAP,
  32         NETDEV_KIND_IP6GRE,
  33         NETDEV_KIND_IP6GRETAP,
  34         NETDEV_KIND_SIT,
  35         NETDEV_KIND_VETH,
  36         NETDEV_KIND_VTI,
  37         NETDEV_KIND_VTI6,
  38         NETDEV_KIND_IP6TNL,
  39         NETDEV_KIND_DUMMY,
  40         NETDEV_KIND_TUN,
  41         NETDEV_KIND_TAP,
  42         NETDEV_KIND_VRF,
  43         NETDEV_KIND_VCAN,
  44         NETDEV_KIND_GENEVE,
  45         NETDEV_KIND_VXCAN,
  46         NETDEV_KIND_WIREGUARD,
  47         NETDEV_KIND_NETDEVSIM,
  48         NETDEV_KIND_FOU,
  49         NETDEV_KIND_ERSPAN,
  50         NETDEV_KIND_L2TP,
  51         NETDEV_KIND_MACSEC,
  52         NETDEV_KIND_NLMON,
  53         _NETDEV_KIND_MAX,
  54         _NETDEV_KIND_TUNNEL, /* Used by config_parse_stacked_netdev() */
  55         _NETDEV_KIND_INVALID = -1
  56 } NetDevKind;
  57
  58 typedef enum NetDevState {
  59         NETDEV_STATE_LOADING,
  60         NETDEV_STATE_FAILED,
  61         NETDEV_STATE_CREATING,
  62         NETDEV_STATE_READY,
  63         NETDEV_STATE_LINGER,
  64         _NETDEV_STATE_MAX,
  65         _NETDEV_STATE_INVALID = -1,
  66 } NetDevState;
  67
  68 typedef enum NetDevCreateType {
  69         NETDEV_CREATE_INDEPENDENT,
  70         NETDEV_CREATE_MASTER,
  71         NETDEV_CREATE_STACKED,
  72         NETDEV_CREATE_AFTER_CONFIGURED,
  73         _NETDEV_CREATE_MAX,
  74         _NETDEV_CREATE_INVALID = -1,
  75 } NetDevCreateType;
  76
  77 typedef struct Manager Manager;
  78 typedef struct Condition Condition;
  79
  80 typedef struct NetDev {
  81         Manager *manager;
  82
  83         unsigned n_ref;
  84
  85         char *filename;
  86
  87         LIST_HEAD(Condition, conditions);
  88
  89         NetDevState state;
  90         NetDevKind kind;
  91         char *description;
  92         char *ifname;
  93         struct ether_addr *mac;
  94         uint32_t mtu;
  95         int ifindex;
  96
  97         LIST_HEAD(netdev_join_callback, callbacks);
  98 } NetDev;
  99
 100 typedef struct NetDevVTable {
 101         /* How much memory does an object of this unit type need */
 102         size_t object_size;
 103
 104         /* Config file sections this netdev kind understands, separated
 105          * by NUL chars */
 106         const char *sections;
 107
 108         /* This should reset all type-specific variables. This should
 109          * not allocate memory, and is called with zero-initialized
 110          * data. It should hence only initialize variables that need
 111          * to be set != 0. */
 112         void (*init)(NetDev *n);
 113
 114         /* This should free all kind-specific variables. It should be
 115          * idempotent. */
 116         void (*done)(NetDev *n);
 117
 118         /* fill in message to create netdev */
 119         int (*fill_message_create)(NetDev *netdev, Link *link, sd_netlink_message *message);
 120
 121         /* specifies if netdev is independent, or a master device or a stacked device */
 122         NetDevCreateType create_type;
 123
 124         /* create netdev, if not done via rtnl */
 125         int (*create)(NetDev *netdev);
 126
 127         /* create netdev after link is fully configured */
 128         int (*create_after_configured)(NetDev *netdev, Link *link);
 129
 130         /* perform additional configuration after netdev has been createad */
 131         int (*post_create)(NetDev *netdev, Link *link, sd_netlink_message *message);
 132
 133         /* verify that compulsory configuration options were specified */
 134         int (*config_verify)(NetDev *netdev, const char *filename);
 135
 136         /* Generate MAC address or not When MACAddress= is not specified. */
 137         bool generate_mac;
 138 } NetDevVTable;
 139
 140 extern const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX];
 141
 142 #define NETDEV_VTABLE(n) ((n)->kind != _NETDEV_KIND_INVALID ? netdev_vtable[(n)->kind] : NULL)
 143
 144 /* For casting a netdev into the various netdev kinds */
 145 #define DEFINE_NETDEV_CAST(UPPERCASE, MixedCase)                            \
 146         static inline MixedCase* UPPERCASE(NetDev *n) {                     \
 147                 if (_unlikely_(!n ||                                        \
 148                                n->kind != NETDEV_KIND_##UPPERCASE) ||       \
 149                                n->state == _NETDEV_STATE_INVALID)           \
 150                         return NULL;                                        \
 151                                                                             \
 152                 return (MixedCase*) n;                                      \
 153         }
 154
 155 /* For casting the various netdev kinds into a netdev */
 156 #define NETDEV(n) (&(n)->meta)
 157
 158 int netdev_load(Manager *manager);
 159 int netdev_load_one(Manager *manager, const char *filename);
 160 void netdev_drop(NetDev *netdev);
 161
 162 NetDev *netdev_unref(NetDev *netdev);
 163 NetDev *netdev_ref(NetDev *netdev);
 164 DEFINE_TRIVIAL_DESTRUCTOR(netdev_destroy_callback, NetDev, netdev_unref);
 165 DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
 166
 167 bool netdev_is_managed(NetDev *netdev);
 168 int netdev_get(Manager *manager, const char *name, NetDev **ret);
 169 int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *newlink);
 170 int netdev_get_mac(const char *ifname, struct ether_addr **ret);
 171 int netdev_join(NetDev *netdev, Link *link, link_netlink_message_handler_t cb);
 172 int netdev_join_after_configured(NetDev *netdev, Link *link, link_netlink_message_handler_t callback);
 173
 174 const char *netdev_kind_to_string(NetDevKind d) _const_;
 175 NetDevKind netdev_kind_from_string(const char *d) _pure_;
 176
 177 static inline NetDevCreateType netdev_get_create_type(NetDev *netdev) {
 178         assert(netdev);
 179         assert(NETDEV_VTABLE(netdev));
 180
 181         return NETDEV_VTABLE(netdev)->create_type;
 182 }
 183
 184
 185 CONFIG_PARSER_PROTOTYPE(config_parse_netdev_kind);
 186
 187 /* gperf */
 188 const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
 189
 190 /* Macros which append INTERFACE= to the message */
 191
 192 #define log_netdev_full(netdev, level, error, ...)                      \
 193         ({                                                              \
 194                 const NetDev *_n = (netdev);                            \
 195                 _n ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _n->ifname, NULL, NULL, ##__VA_ARGS__) : \
 196                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 197         })
 198
 199 #define log_netdev_debug(netdev, ...)       log_netdev_full(netdev, LOG_DEBUG, 0, ##__VA_ARGS__)
 200 #define log_netdev_info(netdev, ...)        log_netdev_full(netdev, LOG_INFO, 0, ##__VA_ARGS__)
 201 #define log_netdev_notice(netdev, ...)      log_netdev_full(netdev, LOG_NOTICE, 0, ##__VA_ARGS__)
 202 #define log_netdev_warning(netdev, ...)     log_netdev_full(netdev, LOG_WARNING, 0, ## __VA_ARGS__)
 203 #define log_netdev_error(netdev, ...)       log_netdev_full(netdev, LOG_ERR, 0, ##__VA_ARGS__)
 204
 205 #define log_netdev_debug_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_DEBUG, error, ##__VA_ARGS__)
 206 #define log_netdev_info_errno(netdev, error, ...)    log_netdev_full(netdev, LOG_INFO, error, ##__VA_ARGS__)
 207 #define log_netdev_notice_errno(netdev, error, ...)  log_netdev_full(netdev, LOG_NOTICE, error, ##__VA_ARGS__)
 208 #define log_netdev_warning_errno(netdev, error, ...) log_netdev_full(netdev, LOG_WARNING, error, ##__VA_ARGS__)
 209 #define log_netdev_error_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_ERR, error, ##__VA_ARGS__)
 210
 211 #define LOG_NETDEV_MESSAGE(netdev, fmt, ...) "MESSAGE=%s: " fmt, (netdev)->ifname, ##__VA_ARGS__
 212 #define LOG_NETDEV_INTERFACE(netdev) "INTERFACE=%s", (netdev)->ifname