src/network/networkd-link-bus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "alloc-util.h"
   4 #include "bus-common-errors.h"
   5 #include "bus-util.h"
   6 #include "networkd-link-bus.h"
   7 #include "networkd-link.h"
   8 #include "networkd-manager.h"
   9 #include "parse-util.h"
  10 #include "strv.h"
  11
  12 BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState);
  13 BUS_DEFINE_PROPERTY_GET_ENUM(property_get_carrier_state, link_carrier_state, LinkCarrierState);
  14 BUS_DEFINE_PROPERTY_GET_ENUM(property_get_address_state, link_address_state, LinkAddressState);
  15 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_administrative_state, link_state, LinkState);
  16
  17 static int property_get_bit_rates(
  18                 sd_bus *bus,
  19                 const char *path,
  20                 const char *interface,
  21                 const char *property,
  22                 sd_bus_message *reply,
  23                 void *userdata,
  24                 sd_bus_error *error) {
  25
  26         Link *link = userdata;
  27         Manager *manager;
  28         double interval_sec;
  29         uint64_t tx, rx;
  30
  31         assert(bus);
  32         assert(reply);
  33         assert(userdata);
  34
  35         manager = link->manager;
  36
  37         if (!manager->use_speed_meter)
  38                 return sd_bus_error_set(error, BUS_ERROR_SPEED_METER_INACTIVE, "Speed meter is disabled.");
  39
  40         if (manager->speed_meter_usec_old == 0)
  41                 return sd_bus_error_set(error, BUS_ERROR_SPEED_METER_INACTIVE, "Speed meter is not active.");
  42
  43         if (!link->stats_updated)
  44                 return sd_bus_error_set(error, BUS_ERROR_SPEED_METER_INACTIVE, "Failed to measure bit-rates.");
  45
  46         assert(manager->speed_meter_usec_new > manager->speed_meter_usec_old);
  47         interval_sec = (manager->speed_meter_usec_new - manager->speed_meter_usec_old) / USEC_PER_SEC;
  48
  49         if (link->stats_new.tx_bytes > link->stats_old.tx_bytes)
  50                 tx = (uint64_t) ((link->stats_new.tx_bytes - link->stats_old.tx_bytes) / interval_sec);
  51         else
  52                 tx = (uint64_t) ((UINT64_MAX - (link->stats_old.tx_bytes - link->stats_new.tx_bytes)) / interval_sec);
  53
  54         if (link->stats_new.rx_bytes > link->stats_old.rx_bytes)
  55                 rx = (uint64_t) ((link->stats_new.rx_bytes - link->stats_old.rx_bytes) / interval_sec);
  56         else
  57                 rx = (uint64_t) ((UINT64_MAX - (link->stats_old.rx_bytes - link->stats_new.rx_bytes)) / interval_sec);
  58
  59         return sd_bus_message_append(reply, "(tt)", tx, rx);
  60 }
  61
  62 const sd_bus_vtable link_vtable[] = {
  63         SD_BUS_VTABLE_START(0),
  64
  65         SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Link, operstate), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  66         SD_BUS_PROPERTY("CarrierState", "s", property_get_carrier_state, offsetof(Link, carrier_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  67         SD_BUS_PROPERTY("AddressState", "s", property_get_address_state, offsetof(Link, address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  68         SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  69         SD_BUS_PROPERTY("BitRates", "(tt)", property_get_bit_rates, 0, 0),
  70
  71         SD_BUS_VTABLE_END
  72 };
  73
  74 char *link_bus_path(Link *link) {
  75         _cleanup_free_ char *ifindex = NULL;
  76         char *p;
  77         int r;
  78
  79         assert(link);
  80         assert(link->ifindex > 0);
  81
  82         if (asprintf(&ifindex, "%d", link->ifindex) < 0)
  83                 return NULL;
  84
  85         r = sd_bus_path_encode("/org/freedesktop/network1/link", ifindex, &p);
  86         if (r < 0)
  87                 return NULL;
  88
  89         return p;
  90 }
  91
  92 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
  93         _cleanup_strv_free_ char **l = NULL;
  94         Manager *m = userdata;
  95         unsigned c = 0;
  96         Link *link;
  97         Iterator i;
  98
  99         assert(bus);
 100         assert(path);
 101         assert(m);
 102         assert(nodes);
 103
 104         l = new0(char*, hashmap_size(m->links) + 1);
 105         if (!l)
 106                 return -ENOMEM;
 107
 108         HASHMAP_FOREACH(link, m->links, i) {
 109                 char *p;
 110
 111                 p = link_bus_path(link);
 112                 if (!p)
 113                         return -ENOMEM;
 114
 115                 l[c++] = p;
 116         }
 117
 118         l[c] = NULL;
 119         *nodes = TAKE_PTR(l);
 120
 121         return 1;
 122 }
 123
 124 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
 125         _cleanup_free_ char *identifier = NULL;
 126         Manager *m = userdata;
 127         Link *link;
 128         int ifindex, r;
 129
 130         assert(bus);
 131         assert(path);
 132         assert(interface);
 133         assert(m);
 134         assert(found);
 135
 136         r = sd_bus_path_decode(path, "/org/freedesktop/network1/link", &identifier);
 137         if (r <= 0)
 138                 return 0;
 139
 140         r = parse_ifindex(identifier, &ifindex);
 141         if (r < 0)
 142                 return 0;
 143
 144         r = link_get(m, ifindex, &link);
 145         if (r < 0)
 146                 return 0;
 147
 148         *found = link;
 149
 150         return 1;
 151 }
 152
 153 int link_send_changed_strv(Link *link, char **properties) {
 154         _cleanup_free_ char *p = NULL;
 155
 156         assert(link);
 157         assert(link->manager);
 158         assert(properties);
 159
 160         if (!link->manager->bus)
 161                 return 0;
 162
 163         p = link_bus_path(link);
 164         if (!p)
 165                 return -ENOMEM;
 166
 167         return sd_bus_emit_properties_changed_strv(
 168                         link->manager->bus,
 169                         p,
 170                         "org.freedesktop.network1.Link",
 171                         properties);
 172 }
 173
 174 int link_send_changed(Link *link, const char *property, ...) {
 175         char **properties;
 176
 177         properties = strv_from_stdarg_alloca(property);
 178
 179         return link_send_changed_strv(link, properties);
 180 }