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Diffstat (limited to 'src/network/netdev/netdev.h')
| -rw-r--r-- | src/network/netdev/netdev.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/network/netdev/netdev.h b/src/network/netdev/netdev.h new file mode 100644 index 0000000000..70ff947b99 --- /dev/null +++ b/src/network/netdev/netdev.h @@ -0,0 +1,202 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2013 Tom Gundersen <teg@jklm.no> + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "sd-netlink.h" + +#include "list.h" +#include "time-util.h" + +typedef struct netdev_join_callback netdev_join_callback; +typedef struct Link Link; + +struct netdev_join_callback { + sd_netlink_message_handler_t callback; + Link *link; + + LIST_FIELDS(netdev_join_callback, callbacks); +}; + +typedef enum NetDevKind { + NETDEV_KIND_BRIDGE, + NETDEV_KIND_BOND, + NETDEV_KIND_VLAN, + NETDEV_KIND_MACVLAN, + NETDEV_KIND_MACVTAP, + NETDEV_KIND_IPVLAN, + NETDEV_KIND_VXLAN, + NETDEV_KIND_IPIP, + NETDEV_KIND_GRE, + NETDEV_KIND_GRETAP, + NETDEV_KIND_IP6GRE, + NETDEV_KIND_IP6GRETAP, + NETDEV_KIND_SIT, + NETDEV_KIND_VETH, + NETDEV_KIND_VTI, + NETDEV_KIND_VTI6, + NETDEV_KIND_IP6TNL, + NETDEV_KIND_DUMMY, + NETDEV_KIND_TUN, + NETDEV_KIND_TAP, + NETDEV_KIND_VRF, + NETDEV_KIND_VCAN, + _NETDEV_KIND_MAX, + _NETDEV_KIND_INVALID = -1 +} NetDevKind; + +typedef enum NetDevState { + NETDEV_STATE_FAILED, + NETDEV_STATE_CREATING, + NETDEV_STATE_READY, + NETDEV_STATE_LINGER, + _NETDEV_STATE_MAX, + _NETDEV_STATE_INVALID = -1, +} NetDevState; + +typedef enum NetDevCreateType { + NETDEV_CREATE_INDEPENDENT, + NETDEV_CREATE_MASTER, + NETDEV_CREATE_STACKED, + _NETDEV_CREATE_MAX, + _NETDEV_CREATE_INVALID = -1, +} NetDevCreateType; + +typedef struct Manager Manager; +typedef struct Condition Condition; + +typedef struct NetDev { + Manager *manager; + + int n_ref; + + char *filename; + + Condition *match_host; + Condition *match_virt; + Condition *match_kernel; + Condition *match_arch; + + NetDevState state; + NetDevKind kind; + char *description; + char *ifname; + struct ether_addr *mac; + size_t mtu; + int ifindex; + + LIST_HEAD(netdev_join_callback, callbacks); +} NetDev; + +typedef struct NetDevVTable { + /* How much memory does an object of this unit type need */ + size_t object_size; + + /* Config file sections this netdev kind understands, separated + * by NUL chars */ + const char *sections; + + /* This should reset all type-specific variables. This should + * not allocate memory, and is called with zero-initialized + * data. It should hence only initialize variables that need + * to be set != 0. */ + void (*init)(NetDev *n); + + /* This should free all kind-specific variables. It should be + * idempotent. */ + void (*done)(NetDev *n); + + /* fill in message to create netdev */ + int (*fill_message_create)(NetDev *netdev, Link *link, sd_netlink_message *message); + + /* specifies if netdev is independent, or a master device or a stacked device */ + NetDevCreateType create_type; + + /* create netdev, if not done via rtnl */ + int (*create)(NetDev *netdev); + + /* perform additional configuration after netdev has been createad */ + int (*post_create)(NetDev *netdev, Link *link, sd_netlink_message *message); + + /* verify that compulsory configuration options were specified */ + int (*config_verify)(NetDev *netdev, const char *filename); +} NetDevVTable; + +extern const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX]; + +#define NETDEV_VTABLE(n) netdev_vtable[(n)->kind] + +/* For casting a netdev into the various netdev kinds */ +#define DEFINE_NETDEV_CAST(UPPERCASE, MixedCase) \ + static inline MixedCase* UPPERCASE(NetDev *n) { \ + if (_unlikely_(!n || n->kind != NETDEV_KIND_##UPPERCASE)) \ + return NULL; \ + \ + return (MixedCase*) n; \ + } + +/* For casting the various netdev kinds into a netdev */ +#define NETDEV(n) (&(n)->meta) + +int netdev_load(Manager *manager); +void netdev_drop(NetDev *netdev); + +NetDev *netdev_unref(NetDev *netdev); +NetDev *netdev_ref(NetDev *netdev); + +DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref); +#define _cleanup_netdev_unref_ _cleanup_(netdev_unrefp) + +int netdev_get(Manager *manager, const char *name, NetDev **ret); +int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *newlink); +int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback); +int netdev_get_mac(const char *ifname, struct ether_addr **ret); +int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t cb); + +const char *netdev_kind_to_string(NetDevKind d) _const_; +NetDevKind netdev_kind_from_string(const char *d) _pure_; + +int config_parse_netdev_kind(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); + +/* gperf */ +const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, unsigned length); + +/* Macros which append INTERFACE= to the message */ + +#define log_netdev_full(netdev, level, error, ...) \ + ({ \ + const NetDev *_n = (netdev); \ + _n ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _n->ifname, NULL, NULL, ##__VA_ARGS__) : \ + log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \ + }) + +#define log_netdev_debug(netdev, ...) log_netdev_full(netdev, LOG_DEBUG, 0, ##__VA_ARGS__) +#define log_netdev_info(netdev, ...) log_netdev_full(netdev, LOG_INFO, 0, ##__VA_ARGS__) +#define log_netdev_notice(netdev, ...) log_netdev_full(netdev, LOG_NOTICE, 0, ##__VA_ARGS__) +#define log_netdev_warning(netdev, ...) log_netdev_full(netdev, LOG_WARNING, 0, ## __VA_ARGS__) +#define log_netdev_error(netdev, ...) log_netdev_full(netdev, LOG_ERR, 0, ##__VA_ARGS__) + +#define log_netdev_debug_errno(netdev, error, ...) log_netdev_full(netdev, LOG_DEBUG, error, ##__VA_ARGS__) +#define log_netdev_info_errno(netdev, error, ...) log_netdev_full(netdev, LOG_INFO, error, ##__VA_ARGS__) +#define log_netdev_notice_errno(netdev, error, ...) log_netdev_full(netdev, LOG_NOTICE, error, ##__VA_ARGS__) +#define log_netdev_warning_errno(netdev, error, ...) log_netdev_full(netdev, LOG_WARNING, error, ##__VA_ARGS__) +#define log_netdev_error_errno(netdev, error, ...) log_netdev_full(netdev, LOG_ERR, error, ##__VA_ARGS__) + +#define LOG_NETDEV_MESSAGE(netdev, fmt, ...) "MESSAGE=%s: " fmt, (netdev)->ifname, ##__VA_ARGS__ +#define LOG_NETDEV_INTERFACE(netdev) "INTERFACE=%s", (netdev)->ifname |