chiark / gitweb /
networkd: netdev - take ref immediately after calling out
[elogind.git] / src / network / networkd-dummy.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4     This file is part of systemd.
5
6     Copyright 2014 Susant Sahani <susant@redhat.com>
7     Copyright 2014 Tom Gundersen
8
9     systemd is free software; you can redistribute it and/or modify it
10     under the terms of the GNU Lesser General Public License as published by
11     the Free Software Foundation; either version 2.1 of the License, or
12     (at your option) any later version.
13
14     systemd is distributed in the hope that it will be useful, but
15     WITHOUT ANY WARRANTY; without even the implied warranty of
16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17     Lesser General Public License for more details.
18
19     You should have received a copy of the GNU Lesser General Public License
20     along with systemd; If not, see <http://www.gnu.org/licenses/>.
21 ***/
22
23 #include <netinet/ether.h>
24 #include <arpa/inet.h>
25 #include <net/if.h>
26 #include <linux/veth.h>
27
28 #include "sd-rtnl.h"
29 #include "networkd.h"
30
31
32 static int netdev_fill_dummy_rtnl_message(NetDev *netdev, sd_rtnl_message *m) {
33         int r;
34
35         assert(netdev);
36         assert(m);
37
38         r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
39         if (r < 0) {
40                 log_error_netdev(netdev,
41                                  "Could not append IFLA_IFNAME, attribute: %s",
42                                  strerror(-r));
43                 return r;
44         }
45
46         if (netdev->mac) {
47                 r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
48                 if (r < 0) {
49                         log_error_netdev(netdev,
50                                          "Colud not append IFLA_ADDRESS attribute: %s",
51                                          strerror(-r));
52                     return r;
53                 }
54         }
55
56         r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
57         if (r < 0) {
58                 log_error_netdev(netdev,
59                                  "Could not append IFLA_LINKINFO attribute: %s",
60                                  strerror(-r));
61                 return r;
62         }
63
64         r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
65                                                  netdev_kind_to_string(netdev->kind));
66         if (r < 0) {
67                 log_error_netdev(netdev,
68                                  "Could not append IFLA_INFO_DATA attribute: %s",
69                                  strerror(-r));
70                 return r;
71         }
72
73         r = sd_rtnl_message_close_container(m);
74         if (r < 0) {
75                 log_error_netdev(netdev,
76                                  "Could not append IFLA_LINKINFO attribute: %s",
77                                  strerror(-r));
78                 return r;
79         }
80
81         return r;
82 }
83
84 int netdev_create_dummy(NetDev *netdev, sd_rtnl_message_handler_t callback) {
85         _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
86         int r;
87
88         assert(netdev);
89         assert(netdev->ifname);
90         assert(netdev->manager);
91         assert(netdev->manager->rtnl);
92
93         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
94         if (r < 0) {
95                 log_error_netdev(netdev,
96                                  "Could not allocate RTM_NEWLINK message: %s",
97                                  strerror(-r));
98                 return r;
99         }
100
101         if(netdev->kind != NETDEV_KIND_DUMMY)
102                 return -ENOTSUP;
103
104         r = netdev_fill_dummy_rtnl_message(netdev, m);
105         if(r < 0)
106                 return r;
107
108         r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, netdev, 0, NULL);
109         if (r < 0) {
110                 log_error_netdev(netdev,
111                                  "Could not send rtnetlink message: %s", strerror(-r));
112                 return r;
113         }
114
115         netdev_ref(netdev);
116
117         log_debug_netdev(netdev, "Creating dummy netdev.");
118
119         netdev->state = NETDEV_STATE_CREATING;
120
121         return 0;
122 }