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Systemd/src/network/networkd-link.h
Patrik Flykt 65dd5e3105 networkd-manager: Fix route removals on shutdown 
In order to shut down networkd properly, the delegated routes added
need to be removed properly, and as error reporting is wanted, the
network link is needed in the debug output.

Solve this by calling manager_dhcp6_prefix_remove_all(), which will
remove each prefix stored in the Manager structure, and while doing
that reference each link so that it isn't freed before the route
removal callback is called. This in turn causes the network link to
be referenced once more, and an explicit hashmap_remove() must be
called to remove the network link from the m->links hashmap.

Also, since the registered callback is not called when the DHCPv6
client is stopped with sd_dhcp6_client_stop(), an explicit call
to dhcp6_lease_pd_prefix_lost() needs to be made to clean up any
unreachable routes set up for the delegated prefixes.
2018-09-19 13:45:18 -06:00

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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include <endian.h>
#include "sd-bus.h"
#include "sd-device.h"
#include "sd-dhcp-client.h"
#include "sd-dhcp-server.h"
#include "sd-dhcp6-client.h"
#include "sd-ipv4ll.h"
#include "sd-lldp.h"
#include "sd-ndisc.h"
#include "sd-radv.h"
#include "sd-netlink.h"
#include "list.h"
#include "set.h"
typedef enum LinkState {
LINK_STATE_PENDING,
LINK_STATE_ENSLAVING,
LINK_STATE_SETTING_ADDRESSES,
LINK_STATE_SETTING_ROUTES,
LINK_STATE_CONFIGURED,
LINK_STATE_UNMANAGED,
LINK_STATE_FAILED,
LINK_STATE_LINGER,
_LINK_STATE_MAX,
_LINK_STATE_INVALID = -1
} LinkState;
typedef enum LinkOperationalState {
LINK_OPERSTATE_OFF,
LINK_OPERSTATE_NO_CARRIER,
LINK_OPERSTATE_DORMANT,
LINK_OPERSTATE_CARRIER,
LINK_OPERSTATE_DEGRADED,
LINK_OPERSTATE_ROUTABLE,
_LINK_OPERSTATE_MAX,
_LINK_OPERSTATE_INVALID = -1
} LinkOperationalState;
typedef struct Manager Manager;
typedef struct Network Network;
typedef struct Address Address;
typedef struct DUID DUID;
typedef struct Link {
Manager *manager;
unsigned n_ref;
int ifindex;
char *ifname;
char *kind;
unsigned short iftype;
char *state_file;
struct ether_addr mac;
struct in6_addr ipv6ll_address;
uint32_t mtu;
sd_device *sd_device;
unsigned flags;
uint8_t kernel_operstate;
Network *network;
LinkState state;
LinkOperationalState operstate;
unsigned address_messages;
unsigned address_label_messages;
unsigned route_messages;
unsigned routing_policy_rule_messages;
unsigned routing_policy_rule_remove_messages;
unsigned enslaving;
Set *addresses;
Set *addresses_foreign;
Set *routes;
Set *routes_foreign;
sd_dhcp_client *dhcp_client;
sd_dhcp_lease *dhcp_lease;
char *lease_file;
uint32_t original_mtu;
unsigned dhcp4_messages;
bool dhcp4_configured;
bool dhcp6_configured;
unsigned ndisc_messages;
bool ndisc_configured;
sd_ipv4ll *ipv4ll;
bool ipv4ll_address:1;
bool ipv4ll_route:1;
bool static_routes_configured;
bool routing_policy_rules_configured;
bool setting_mtu;
LIST_HEAD(Address, pool_addresses);
sd_dhcp_server *dhcp_server;
sd_ndisc *ndisc;
Set *ndisc_rdnss;
Set *ndisc_dnssl;
sd_radv *radv;
sd_dhcp6_client *dhcp6_client;
bool rtnl_extended_attrs;
/* This is about LLDP reception */
sd_lldp *lldp;
char *lldp_file;
/* This is about LLDP transmission */
unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
sd_event_source *lldp_emit_event_source;
Hashmap *bound_by_links;
Hashmap *bound_to_links;
} Link;
DUID *link_get_duid(Link *link);
int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
Link *link_unref(Link *link);
Link *link_ref(Link *link);
int link_get(Manager *m, int ifindex, Link **ret);
int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
void link_drop(Link *link);
int link_up(Link *link);
int link_down(Link *link);
int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
void link_enter_failed(Link *link);
int link_initialized(Link *link, sd_device *device);
void link_check_ready(Link *link);
void link_update_operstate(Link *link);
int link_update(Link *link, sd_netlink_message *message);
void link_dirty(Link *link);
void link_clean(Link *link);
int link_save(Link *link);
int link_carrier_reset(Link *link);
bool link_has_carrier(Link *link);
int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
int link_set_mtu(Link *link, uint32_t mtu);
int ipv4ll_configure(Link *link);
int dhcp4_configure(Link *link);
int dhcp4_set_client_identifier(Link *link);
int dhcp4_set_promote_secondaries(Link *link);
int dhcp6_configure(Link *link);
int dhcp6_request_address(Link *link, int ir);
int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link);
const char* link_state_to_string(LinkState s) _const_;
LinkState link_state_from_string(const char *s) _pure_;
const char* link_operstate_to_string(LinkOperationalState s) _const_;
LinkOperationalState link_operstate_from_string(const char *s) _pure_;
extern const sd_bus_vtable link_vtable[];
int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
int link_send_changed(Link *link, const char *property, ...) _sentinel_;
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
/* Macros which append INTERFACE= to the message */
#define log_link_full(link, level, error, ...) \
({ \
const Link *_l = (link); \
_l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, NULL, NULL, ##__VA_ARGS__) : \
log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
}) \
#define log_link_debug(link, ...) log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
#define log_link_info(link, ...) log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
#define log_link_notice(link, ...) log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
#define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
#define log_link_error(link, ...) log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
#define log_link_debug_errno(link, error, ...) log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
#define log_link_info_errno(link, error, ...) log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
#define log_link_notice_errno(link, error, ...) log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
#define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
#define log_link_error_errno(link, error, ...) log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
#define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
#define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
#define ADDRESS_FMT_VAL(address) \
be32toh((address).s_addr) >> 24, \
(be32toh((address).s_addr) >> 16) & 0xFFu, \
(be32toh((address).s_addr) >> 8) & 0xFFu, \
be32toh((address).s_addr) & 0xFFu
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