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networkd-queue.c
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330 lines (295 loc) · 11.5 KB
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "networkd-address.h"
#include "networkd-address-label.h"
#include "networkd-bridge-fdb.h"
#include "networkd-bridge-mdb.h"
#include "networkd-dhcp-server.h"
#include "networkd-ipv6-proxy-ndp.h"
#include "networkd-manager.h"
#include "networkd-neighbor.h"
#include "networkd-nexthop.h"
#include "networkd-route.h"
#include "networkd-routing-policy-rule.h"
#include "networkd-queue.h"
#include "networkd-setlink.h"
static void request_free_object(RequestType type, void *object) {
switch(type) {
case REQUEST_TYPE_ACTIVATE_LINK:
break;
case REQUEST_TYPE_ADDRESS:
address_free(object);
break;
case REQUEST_TYPE_ADDRESS_LABEL:
address_label_free(object);
break;
case REQUEST_TYPE_BRIDGE_FDB:
bridge_fdb_free(object);
break;
case REQUEST_TYPE_BRIDGE_MDB:
bridge_mdb_free(object);
break;
case REQUEST_TYPE_CREATE_STACKED_NETDEV:
break;
case REQUEST_TYPE_DHCP_SERVER:
break;
case REQUEST_TYPE_IPV6_PROXY_NDP:
free(object);
break;
case REQUEST_TYPE_NEIGHBOR:
neighbor_free(object);
break;
case REQUEST_TYPE_NEXTHOP:
nexthop_free(object);
break;
case REQUEST_TYPE_ROUTE:
route_free(object);
break;
case REQUEST_TYPE_ROUTING_POLICY_RULE:
routing_policy_rule_free(object);
break;
case REQUEST_TYPE_SET_LINK:
case REQUEST_TYPE_UP_DOWN:
break;
default:
assert_not_reached("invalid request type.");
}
}
static Request *request_free(Request *req) {
if (!req)
return NULL;
if (req->link && req->link->manager)
/* To prevent from triggering assertions in hash functions, remove this request before
* freeing object below. */
ordered_set_remove(req->link->manager->request_queue, req);
if (req->on_free)
/* on_free() may use object. So, let's call this earlier. */
req->on_free(req);
if (req->consume_object)
request_free_object(req->type, req->object);
link_unref(req->link);
return mfree(req);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(Request*, request_free);
void request_drop(Request *req) {
if (!req)
return;
if (req->message_counter)
(*req->message_counter)--;
request_free(req);
}
static void request_hash_func(const Request *req, struct siphash *state) {
assert(req);
assert(req->link);
assert(state);
siphash24_compress(&req->link->ifindex, sizeof(req->link->ifindex), state);
siphash24_compress(&req->type, sizeof(req->type), state);
switch(req->type) {
case REQUEST_TYPE_ACTIVATE_LINK:
break;
case REQUEST_TYPE_ADDRESS:
address_hash_func(req->address, state);
break;
case REQUEST_TYPE_ADDRESS_LABEL:
case REQUEST_TYPE_BRIDGE_FDB:
case REQUEST_TYPE_BRIDGE_MDB:
case REQUEST_TYPE_CREATE_STACKED_NETDEV:
/* TODO: Currently, these types do not have any specific hash and compare functions.
* Fortunately, all these objects are 'static', thus we can use the trivial functions. */
trivial_hash_func(req->object, state);
break;
case REQUEST_TYPE_DHCP_SERVER:
/* This type does not have object. */
break;
case REQUEST_TYPE_IPV6_PROXY_NDP:
in6_addr_hash_func(req->ipv6_proxy_ndp, state);
break;
case REQUEST_TYPE_NEIGHBOR:
neighbor_hash_func(req->neighbor, state);
break;
case REQUEST_TYPE_NEXTHOP:
nexthop_hash_func(req->nexthop, state);
break;
case REQUEST_TYPE_ROUTE:
route_hash_func(req->route, state);
break;
case REQUEST_TYPE_ROUTING_POLICY_RULE:
routing_policy_rule_hash_func(req->rule, state);
break;
case REQUEST_TYPE_SET_LINK: {
trivial_hash_func(req->set_link_operation_ptr, state);
break;
}
case REQUEST_TYPE_UP_DOWN:
break;
default:
assert_not_reached("invalid request type.");
}
}
static int request_compare_func(const struct Request *a, const struct Request *b) {
int r;
assert(a);
assert(b);
assert(a->link);
assert(b->link);
r = CMP(a->link->ifindex, b->link->ifindex);
if (r != 0)
return r;
r = CMP(a->type, b->type);
if (r != 0)
return r;
switch (a->type) {
case REQUEST_TYPE_ACTIVATE_LINK:
return 0;
case REQUEST_TYPE_ADDRESS:
return address_compare_func(a->address, b->address);
case REQUEST_TYPE_ADDRESS_LABEL:
case REQUEST_TYPE_BRIDGE_FDB:
case REQUEST_TYPE_BRIDGE_MDB:
case REQUEST_TYPE_CREATE_STACKED_NETDEV:
return trivial_compare_func(a->object, b->object);
case REQUEST_TYPE_DHCP_SERVER:
return 0;
case REQUEST_TYPE_IPV6_PROXY_NDP:
return in6_addr_compare_func(a->ipv6_proxy_ndp, b->ipv6_proxy_ndp);
case REQUEST_TYPE_NEIGHBOR:
return neighbor_compare_func(a->neighbor, b->neighbor);
case REQUEST_TYPE_NEXTHOP:
return nexthop_compare_func(a->nexthop, b->nexthop);
case REQUEST_TYPE_ROUTE:
return route_compare_func(a->route, b->route);
case REQUEST_TYPE_ROUTING_POLICY_RULE:
return routing_policy_rule_compare_func(a->rule, b->rule);
case REQUEST_TYPE_SET_LINK:
return trivial_compare_func(a->set_link_operation_ptr, b->set_link_operation_ptr);
case REQUEST_TYPE_UP_DOWN:
return 0;
default:
assert_not_reached("invalid request type.");
}
}
DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
request_hash_ops,
Request,
request_hash_func,
request_compare_func,
request_free);
int link_queue_request(
Link *link,
RequestType type,
void *object,
bool consume_object,
unsigned *message_counter,
link_netlink_message_handler_t netlink_handler,
Request **ret) {
_cleanup_(request_freep) Request *req = NULL;
Request *existing;
int r;
assert(link);
assert(link->manager);
assert(type >= 0 && type < _REQUEST_TYPE_MAX);
assert(IN_SET(type,
REQUEST_TYPE_ACTIVATE_LINK,
REQUEST_TYPE_DHCP_SERVER,
REQUEST_TYPE_SET_LINK,
REQUEST_TYPE_UP_DOWN) ||
object);
assert(type == REQUEST_TYPE_DHCP_SERVER || netlink_handler);
req = new(Request, 1);
if (!req) {
if (consume_object)
request_free_object(type, object);
return -ENOMEM;
}
*req = (Request) {
.link = link_ref(link),
.type = type,
.object = object,
.consume_object = consume_object,
.message_counter = message_counter,
.netlink_handler = netlink_handler,
};
existing = ordered_set_get(link->manager->request_queue, req);
if (existing) {
/* To prevent from removing the existing request. */
req->link = link_unref(req->link);
if (ret)
*ret = existing;
return 0;
}
r = ordered_set_ensure_put(&link->manager->request_queue, &request_hash_ops, req);
if (r < 0)
return r;
if (req->message_counter)
(*req->message_counter)++;
if (ret)
*ret = req;
TAKE_PTR(req);
return 1;
}
int manager_process_requests(sd_event_source *s, void *userdata) {
Manager *manager = userdata;
int r;
assert(manager);
for (;;) {
bool processed = false;
Request *req;
ORDERED_SET_FOREACH(req, manager->request_queue) {
switch(req->type) {
case REQUEST_TYPE_ACTIVATE_LINK:
r = request_process_activation(req);
break;
case REQUEST_TYPE_ADDRESS:
r = request_process_address(req);
break;
case REQUEST_TYPE_ADDRESS_LABEL:
r = request_process_address_label(req);
break;
case REQUEST_TYPE_BRIDGE_FDB:
r = request_process_bridge_fdb(req);
break;
case REQUEST_TYPE_BRIDGE_MDB:
r = request_process_bridge_mdb(req);
break;
case REQUEST_TYPE_CREATE_STACKED_NETDEV:
r = request_process_create_stacked_netdev(req);
break;
case REQUEST_TYPE_DHCP_SERVER:
r = request_process_dhcp_server(req);
break;
case REQUEST_TYPE_IPV6_PROXY_NDP:
r = request_process_ipv6_proxy_ndp_address(req);
break;
case REQUEST_TYPE_NEIGHBOR:
r = request_process_neighbor(req);
break;
case REQUEST_TYPE_NEXTHOP:
r = request_process_nexthop(req);
break;
case REQUEST_TYPE_ROUTE:
r = request_process_route(req);
break;
case REQUEST_TYPE_ROUTING_POLICY_RULE:
r = request_process_routing_policy_rule(req);
break;
case REQUEST_TYPE_SET_LINK:
r = request_process_set_link(req);
break;
case REQUEST_TYPE_UP_DOWN:
r = request_process_link_up_or_down(req);
break;
default:
return -EINVAL;
}
if (r < 0)
link_enter_failed(req->link);
if (r > 0) {
ordered_set_remove(manager->request_queue, req);
request_free(req);
processed = true;
}
}
if (!processed)
break;
}
return 0;
}