• source navigation  • diff markup  • identifier search  • freetext search  • 

Sources/netifd/macvlan.c

  1 /*
  2  * netifd - network interface daemon
  3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
  4  * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2
  8  * as published by the Free Software Foundation
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  */
 15 #include <string.h>
 16 #include <stdlib.h>
 17 #include <stdio.h>
 18 #include <assert.h>
 19 #include <errno.h>
 20 #include <net/ethernet.h>
 21 
 22 #ifdef linux
 23 #include <netinet/ether.h>
 24 #endif
 25 
 26 #include "netifd.h"
 27 #include "device.h"
 28 #include "interface.h"
 29 #include "system.h"
 30 
 31 enum {
 32         MACVLAN_ATTR_IFNAME,
 33         MACVLAN_ATTR_MACADDR,
 34         MACVLAN_ATTR_MODE,
 35         __MACVLAN_ATTR_MAX
 36 };
 37 
 38 static const struct blobmsg_policy macvlan_attrs[__MACVLAN_ATTR_MAX] = {
 39         [MACVLAN_ATTR_IFNAME]  = { "ifname", BLOBMSG_TYPE_STRING },
 40         [MACVLAN_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
 41         [MACVLAN_ATTR_MODE] = { "mode", BLOBMSG_TYPE_STRING },
 42 };
 43 
 44 static const struct uci_blob_param_list macvlan_attr_list = {
 45         .n_params = __MACVLAN_ATTR_MAX,
 46         .params = macvlan_attrs,
 47 
 48         .n_next = 1,
 49         .next = { &device_attr_list },
 50 };
 51 
 52 struct macvlan_device {
 53         struct device dev;
 54         struct device_user parent;
 55 
 56         device_state_cb set_state;
 57 
 58         struct blob_attr *config_data;
 59         struct blob_attr *ifname;
 60         struct macvlan_config config;
 61 };
 62 
 63 static void
 64 macvlan_base_cb(struct device_user *dev, enum device_event ev)
 65 {
 66         struct macvlan_device *mvdev = container_of(dev, struct macvlan_device, parent);
 67 
 68         switch (ev) {
 69         case DEV_EVENT_ADD:
 70                 device_set_present(&mvdev->dev, true);
 71                 break;
 72         case DEV_EVENT_REMOVE:
 73                 device_set_present(&mvdev->dev, false);
 74                 break;
 75         default:
 76                 return;
 77         }
 78 }
 79 
 80 static int
 81 macvlan_set_down(struct macvlan_device *mvdev)
 82 {
 83         mvdev->set_state(&mvdev->dev, false);
 84         system_macvlan_del(&mvdev->dev);
 85         device_release(&mvdev->parent);
 86 
 87         return 0;
 88 }
 89 
 90 static int
 91 macvlan_set_up(struct macvlan_device *mvdev)
 92 {
 93         int ret;
 94 
 95         ret = device_claim(&mvdev->parent);
 96         if (ret < 0)
 97                 return ret;
 98 
 99         ret = system_macvlan_add(&mvdev->dev, mvdev->parent.dev, &mvdev->config);
100         if (ret < 0)
101                 goto release;
102 
103         ret = mvdev->set_state(&mvdev->dev, true);
104         if (ret)
105                 goto delete;
106 
107         return 0;
108 
109 delete:
110         system_macvlan_del(&mvdev->dev);
111 release:
112         device_release(&mvdev->parent);
113         return ret;
114 }
115 
116 static int
117 macvlan_set_state(struct device *dev, bool up)
118 {
119         struct macvlan_device *mvdev;
120 
121         D(SYSTEM, "macvlan_set_state(%s, %u)\n", dev->ifname, up);
122 
123         mvdev = container_of(dev, struct macvlan_device, dev);
124         if (up)
125                 return macvlan_set_up(mvdev);
126         else
127                 return macvlan_set_down(mvdev);
128 }
129 
130 static void
131 macvlan_free(struct device *dev)
132 {
133         struct macvlan_device *mvdev;
134 
135         mvdev = container_of(dev, struct macvlan_device, dev);
136         device_remove_user(&mvdev->parent);
137         free(mvdev->config_data);
138         free(mvdev);
139 }
140 
141 static void
142 macvlan_dump_info(struct device *dev, struct blob_buf *b)
143 {
144         struct macvlan_device *mvdev;
145 
146         mvdev = container_of(dev, struct macvlan_device, dev);
147         blobmsg_add_string(b, "parent", mvdev->parent.dev->ifname);
148         system_if_dump_info(dev, b);
149 }
150 
151 static void
152 macvlan_config_init(struct device *dev)
153 {
154         struct macvlan_device *mvdev;
155         struct device *basedev = NULL;
156 
157         mvdev = container_of(dev, struct macvlan_device, dev);
158         if (mvdev->ifname)
159                 basedev = device_get(blobmsg_data(mvdev->ifname), true);
160 
161         device_add_user(&mvdev->parent, basedev);
162 }
163 
164 static void
165 macvlan_apply_settings(struct macvlan_device *mvdev, struct blob_attr **tb)
166 {
167         struct macvlan_config *cfg = &mvdev->config;
168         struct blob_attr *cur;
169         struct ether_addr *ea;
170 
171         cfg->flags = 0;
172         cfg->mode = NULL;
173 
174         if ((cur = tb[MACVLAN_ATTR_MACADDR])) {
175                 ea = ether_aton(blobmsg_data(cur));
176                 if (ea) {
177                         memcpy(cfg->macaddr, ea, 6);
178                         cfg->flags |= MACVLAN_OPT_MACADDR;
179                 }
180         }
181 
182         if ((cur = tb[MACVLAN_ATTR_MODE]))
183                 cfg->mode = blobmsg_data(cur);
184 }
185 
186 static enum dev_change_type
187 macvlan_reload(struct device *dev, struct blob_attr *attr)
188 {
189         struct blob_attr *tb_dev[__DEV_ATTR_MAX];
190         struct blob_attr *tb_mv[__MACVLAN_ATTR_MAX];
191         enum dev_change_type ret = DEV_CONFIG_APPLIED;
192         struct macvlan_device *mvdev;
193 
194         mvdev = container_of(dev, struct macvlan_device, dev);
195         attr = blob_memdup(attr);
196 
197         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
198                 blob_data(attr), blob_len(attr));
199         blobmsg_parse(macvlan_attrs, __MACVLAN_ATTR_MAX, tb_mv,
200                 blob_data(attr), blob_len(attr));
201 
202         device_init_settings(dev, tb_dev);
203         macvlan_apply_settings(mvdev, tb_mv);
204         mvdev->ifname = tb_mv[MACVLAN_ATTR_IFNAME];
205 
206         if (mvdev->config_data) {
207                 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
208                 struct blob_attr *otb_mv[__MACVLAN_ATTR_MAX];
209 
210                 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
211                         blob_data(mvdev->config_data), blob_len(mvdev->config_data));
212 
213                 if (uci_blob_diff(tb_dev, otb_dev, &device_attr_list, NULL))
214                     ret = DEV_CONFIG_RESTART;
215 
216                 blobmsg_parse(macvlan_attrs, __MACVLAN_ATTR_MAX, otb_mv,
217                         blob_data(mvdev->config_data), blob_len(mvdev->config_data));
218 
219                 if (uci_blob_diff(tb_mv, otb_mv, &macvlan_attr_list, NULL))
220                     ret = DEV_CONFIG_RESTART;
221 
222                 macvlan_config_init(dev);
223         }
224 
225         free(mvdev->config_data);
226         mvdev->config_data = attr;
227         return ret;
228 }
229 
230 static struct device *
231 macvlan_create(const char *name, struct device_type *devtype,
232         struct blob_attr *attr)
233 {
234         struct macvlan_device *mvdev;
235         struct device *dev = NULL;
236 
237         mvdev = calloc(1, sizeof(*mvdev));
238         if (!mvdev)
239                 return NULL;
240 
241         dev = &mvdev->dev;
242         if (device_init(dev, devtype, name) < 0) {
243                 device_cleanup(dev);
244                 free(mvdev);
245                 return NULL;
246         }
247 
248         dev->config_pending = true;
249 
250         mvdev->set_state = dev->set_state;
251         dev->set_state = macvlan_set_state;
252 
253         dev->hotplug_ops = NULL;
254         mvdev->parent.cb = macvlan_base_cb;
255 
256         macvlan_reload(dev, attr);
257 
258         return dev;
259 }
260 
261 static struct device_type macvlan_device_type = {
262         .name = "macvlan",
263         .config_params = &macvlan_attr_list,
264         .create = macvlan_create,
265         .config_init = macvlan_config_init,
266         .reload = macvlan_reload,
267         .free = macvlan_free,
268         .dump_info = macvlan_dump_info,
269 };
270 
271 static void __init macvlan_device_type_init(void)
272 {
273         device_type_add(&macvlan_device_type);
274 }
275 

This page was automatically generated by LXR 0.3.1.  •  OpenWrt