1 /* Copyright (c) 2009 Nicira Networks
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include "proc-net-compat.h"
23 #include "dynamic-string.h"
25 #include "netlink-protocol.h"
28 #include "openvswitch/brcompat-netlink.h"
33 #define THIS_MODULE VLM_proc_net_compat
36 /* Netlink socket to bridge compatibility kernel module. */
37 static struct nl_sock *brc_sock;
39 /* The Generic Netlink family number used for bridge compatibility. */
40 static int brc_family = 0;
42 /* Rate limiting for log messages. */
43 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
45 static void flush_dir(const char *dir);
46 static int set_proc_file(const char *dir, const char *file, const char *data);
48 /* Initializes the /proc/net compatibility layer. Returns 0 if successful,
49 * otherwise a positive errno value. */
51 proc_net_compat_init(void)
54 int retval = nl_lookup_genl_family(BRC_GENL_FAMILY_NAME, &brc_family);
59 retval = nl_sock_create(NETLINK_GENERIC, 0, 0, 0, &brc_sock);
64 flush_dir("/proc/net/vlan");
65 flush_dir("/proc/net/bonding");
71 set_proc_file(const char *dir, const char *file, const char *data)
73 struct ofpbuf request, *reply;
76 ofpbuf_init(&request, 0);
77 nl_msg_put_genlmsghdr(&request, brc_sock, 1024, brc_family, NLM_F_REQUEST,
78 BRC_GENL_C_SET_PROC, 1);
79 nl_msg_put_string(&request, BRC_GENL_A_PROC_DIR, dir);
80 nl_msg_put_string(&request, BRC_GENL_A_PROC_NAME, file);
82 nl_msg_put_string(&request, BRC_GENL_A_PROC_DATA, data);
85 retval = nl_sock_transact(brc_sock, &request, &reply);
86 ofpbuf_uninit(&request);
89 VLOG_WARN_RL(&rl, "failed to %s /proc/%s/%s (%s)",
90 data ? "update" : "remove", dir, file, strerror(retval));
96 flush_dir(const char *dir)
102 assert(!memcmp(dir, "/proc/", 6));
105 stream = opendir(dir);
107 if (errno != ENOENT) {
108 VLOG_WARN_RL(&rl, "%s: open failed (%s)", dir, strerror(errno));
113 while ((de = readdir(stream)) != NULL) {
114 if (strcmp(de->d_name, ".") && strcmp(de->d_name, "..")) {
115 set_proc_file(subdir, de->d_name, NULL);
121 /* If 'bond' is nonnull, creates a file in /proc/net/bonding for a bond with
122 * the given 'name' and the details in 'bond'. If 'bond' is null, deletes
123 * the /proc/net/bonding file with the given 'name'.
125 * This function has no effect unless proc_net_compat_init() has been
128 proc_net_compat_update_bond(const char *name, const struct compat_bond *bond)
138 set_proc_file("net/bonding", name, NULL);
145 "Ethernet Channel Bonding Driver: ovs-vswitchd "
146 VERSION BUILDNR" ("__DATE__" "__TIME__")\n"
147 "Bonding Mode: source load balancing\n"
148 "Primary Slave: None\n"
149 "Currently Active Slave: None\n"
151 "MII Polling Interval (ms): 100\n"
152 "Up Delay (ms): %d\n"
153 "Down Delay (ms): %d\n"
155 "Source load balancing info:\n",
156 bond->up ? "up" : "down", bond->updelay, bond->downdelay);
158 for (i = 0; i < bond->n_hashes; i++) {
159 const struct compat_bond_hash *cbh = &bond->hashes[i];
160 ds_put_format(&ds, " [%03d] = %s\n", cbh->hash, cbh->netdev_name);
163 for (i = 0; i < bond->n_slaves; i++) {
164 const struct compat_bond_slave *slave = &bond->slaves[i];
168 "Slave Interface: %s\n"
170 "Link Failure Count: 0\n"
171 "Permanent HW addr: "ETH_ADDR_FMT"\n",
172 slave->name, slave->up ? "up" : "down",
173 ETH_ADDR_ARGS(slave->mac));
175 set_proc_file("net/bonding", name, ds_cstr(&ds));
179 /* /proc/net/vlan compatibility.
181 * This is much more complex than I expected it to be. */
185 struct hmap_node trunk_node; /* Hash map node. */
186 char *trunk_dev; /* Name of trunk network device. */
187 int vid; /* VLAN number. */
189 /* Auxiliary data. */
190 char *vlan_dev; /* sprintf("%s.%d", trunk_dev, vid); */
191 struct svec tagged_devs; /* Name of tagged network device(s). */
194 /* Current set of VLAN devices, indexed two different ways. */
195 static struct hmap vlans_by_trunk = HMAP_INITIALIZER(&vlans_by_trunk);
196 static struct shash vlans_by_tagged = SHASH_INITIALIZER(&vlans_by_tagged);
198 static bool remove_tagged_dev(struct shash_node *, const char *tagged_dev);
199 static void update_vlan_config(void);
200 static void set_vlan_proc_file(const struct compat_vlan *);
201 static uint32_t hash_vlan(const char *trunk_dev, uint32_t vid);
203 /* Updates the /proc/net/vlan compatibility layer's idea of what trunk device
204 * and VLAN the given 'tagged_dev' is associated with. If 'tagged_dev' has an
205 * implicit VLAN tag, then 'trunk_dev' should be the name of a network device
206 * on the same bridge that trunks that VLAN, and 'vid' should be the VLAN tag
207 * number. If 'tagged_dev' does not have an implicit VLAN tag, then
208 * 'trunk_dev' should be NULL and 'vid' should be -1.
210 * This function has no effect unless proc_net_compat_init() has been
213 proc_net_compat_update_vlan(const char *tagged_dev, const char *trunk_dev,
216 struct compat_vlan *vlan;
217 struct shash_node *node;
223 /* Find the compat_vlan that we currently have for 'tagged_dev' (if
225 node = shash_find(&vlans_by_tagged, tagged_dev);
226 vlan = node ? node->data : NULL;
227 if (vid <= 0 || !trunk_dev) {
229 if (remove_tagged_dev(node, tagged_dev)) {
230 update_vlan_config();
235 if (!strcmp(trunk_dev, vlan->trunk_dev) && vid == vlan->vid) {
239 /* 'tagged_dev' is attached to the wrong compat_vlan. Start
240 * by removing it from that one. */
241 remove_tagged_dev(node, tagged_dev);
247 /* 'tagged_dev' is not attached to any compat_vlan. Find the
248 * compat_vlan corresponding to (trunk_dev,vid) to attach it to, or
249 * create a new compat_vlan if none exists for (trunk_dev,vid). */
250 HMAP_FOR_EACH_WITH_HASH (vlan, struct compat_vlan, trunk_node,
251 hash_vlan(trunk_dev, vid),
253 if (!strcmp(trunk_dev, vlan->trunk_dev) && vid == vlan->vid) {
258 /* Create a new compat_vlan for (trunk_dev,vid). */
259 vlan = xzalloc(sizeof *vlan);
260 vlan->trunk_dev = xstrdup(trunk_dev);
262 vlan->vlan_dev = xasprintf("%s.%d", trunk_dev, vid);
263 svec_init(&vlan->tagged_devs);
264 hmap_insert(&vlans_by_trunk, &vlan->trunk_node,
265 hash_vlan(trunk_dev, vid));
266 set_vlan_proc_file(vlan);
269 /* Attach 'tagged_dev' to 'vlan'. */
270 svec_add(&vlan->tagged_devs, tagged_dev);
271 shash_add(&vlans_by_tagged, tagged_dev, vlan);
272 svec_sort(&vlan->tagged_devs);
273 update_vlan_config();
277 /* Remove 'tagged_dev' from the compat_vlan in 'node'. If that causes the
278 * compat_vlan to have no tagged_devs left, destroy the compat_vlan too. */
280 remove_tagged_dev(struct shash_node *node, const char *tagged_dev)
282 struct compat_vlan *vlan = node->data;
284 svec_del(&vlan->tagged_devs, tagged_dev);
285 shash_delete(&vlans_by_tagged, node);
286 if (!vlan->tagged_devs.n) {
287 set_proc_file("net/vlan", vlan->vlan_dev, NULL);
289 hmap_remove(&vlans_by_trunk, &vlan->trunk_node);
290 svec_destroy(&vlan->tagged_devs);
291 free(vlan->trunk_dev);
292 free(vlan->vlan_dev);
299 /* Returns a hash value for (trunk_dev,vid). */
301 hash_vlan(const char *trunk_dev, uint32_t vid)
303 return hash_int(vid, hash_string(trunk_dev, 0));
306 /* Update /proc/net/vlan/<vlan_dev> for 'vlan'. */
308 set_vlan_proc_file(const struct compat_vlan *vlan)
315 "%s VID: %d\t REORDER_HDR: 1 dev->priv_flags: 81\n"
316 " total frames received 0\n"
317 " total bytes received 0\n"
318 " Broadcast/Multicast Rcvd 0\n"
320 " total frames transmitted 0\n"
321 " total bytes transmitted 0\n"
322 " total headroom inc 0\n"
323 " total encap on xmit 0\n"
325 "INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0\n"
326 "EGRESSS priority Mappings: \n",
327 vlan->vlan_dev, vlan->vid, vlan->trunk_dev);
328 set_proc_file("net/vlan", vlan->vlan_dev, ds_cstr(&ds));
332 /* Update /proc/net/vlan/config. */
334 update_vlan_config(void)
336 struct compat_vlan *vlan;
340 ds_put_cstr(&ds, "VLAN Dev name | VLAN ID\n"
341 "Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD\n");
342 HMAP_FOR_EACH (vlan, struct compat_vlan, trunk_node, &vlans_by_trunk) {
343 ds_put_format(&ds, "%-15s| %d | %s\n",
344 vlan->vlan_dev, vlan->vid, vlan->trunk_dev);
346 set_proc_file("net/vlan", "config", ds_cstr(&ds));