1 // SPDX-License-Identifier: GPL-2.0
2 #include <generated/utsrelease.h>
3 #include <linux/proc_fs.h>
4 #include <linux/ethtool.h>
5 #include <linux/export.h>
6 #include <net/net_namespace.h>
7 #include <net/netns/generic.h>
8 #include <net/bonding.h>
9
10 #define bond_version "Ethernet Channel Bonding Driver: v" UTS_RELEASE "\n"
11
bond_info_seq_start(struct seq_file * seq,loff_t * pos)12 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
13 __acquires(RCU)
14 {
15 struct bonding *bond = pde_data(file_inode(seq->file));
16 struct list_head *iter;
17 struct slave *slave;
18 loff_t off = 0;
19
20 rcu_read_lock();
21
22 if (*pos == 0)
23 return SEQ_START_TOKEN;
24
25 bond_for_each_slave_rcu(bond, slave, iter)
26 if (++off == *pos)
27 return slave;
28
29 return NULL;
30 }
31
bond_info_seq_next(struct seq_file * seq,void * v,loff_t * pos)32 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
33 {
34 struct bonding *bond = pde_data(file_inode(seq->file));
35 struct list_head *iter;
36 struct slave *slave;
37 bool found = false;
38
39 ++*pos;
40 if (v == SEQ_START_TOKEN)
41 return bond_first_slave_rcu(bond);
42
43 bond_for_each_slave_rcu(bond, slave, iter) {
44 if (found)
45 return slave;
46 if (slave == v)
47 found = true;
48 }
49
50 return NULL;
51 }
52
bond_info_seq_stop(struct seq_file * seq,void * v)53 static void bond_info_seq_stop(struct seq_file *seq, void *v)
54 __releases(RCU)
55 {
56 rcu_read_unlock();
57 }
58
bond_info_show_master(struct seq_file * seq)59 static void bond_info_show_master(struct seq_file *seq)
60 {
61 struct bonding *bond = pde_data(file_inode(seq->file));
62 const struct bond_opt_value *optval;
63 struct slave *curr, *primary;
64 int i;
65
66 curr = rcu_dereference(bond->curr_active_slave);
67
68 seq_printf(seq, "Bonding Mode: %s",
69 bond_mode_name(BOND_MODE(bond)));
70
71 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
72 bond->params.fail_over_mac) {
73 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
74 bond->params.fail_over_mac);
75 seq_printf(seq, " (fail_over_mac %s)", optval->string);
76 }
77
78 seq_printf(seq, "\n");
79
80 if (bond_mode_uses_xmit_hash(bond)) {
81 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
82 bond->params.xmit_policy);
83 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
84 optval->string, bond->params.xmit_policy);
85 }
86
87 if (bond_uses_primary(bond)) {
88 primary = rcu_dereference(bond->primary_slave);
89 seq_printf(seq, "Primary Slave: %s",
90 primary ? primary->dev->name : "None");
91 if (primary) {
92 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
93 bond->params.primary_reselect);
94 seq_printf(seq, " (primary_reselect %s)",
95 optval->string);
96 }
97
98 seq_printf(seq, "\nCurrently Active Slave: %s\n",
99 (curr) ? curr->dev->name : "None");
100 }
101
102 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
103 "up" : "down");
104 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
105 seq_printf(seq, "Up Delay (ms): %d\n",
106 bond->params.updelay * bond->params.miimon);
107 seq_printf(seq, "Down Delay (ms): %d\n",
108 bond->params.downdelay * bond->params.miimon);
109 seq_printf(seq, "Peer Notification Delay (ms): %d\n",
110 bond->params.peer_notif_delay * bond->params.miimon);
111
112
113 /* ARP information */
114 if (bond->params.arp_interval > 0) {
115 int printed = 0;
116
117 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
118 bond->params.arp_interval);
119 seq_printf(seq, "ARP Missed Max: %u\n",
120 bond->params.missed_max);
121
122 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
123
124 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
125 if (!bond->params.arp_targets[i])
126 break;
127 if (printed)
128 seq_printf(seq, ",");
129 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
130 printed = 1;
131 }
132 seq_printf(seq, "\n");
133
134 #if IS_ENABLED(CONFIG_IPV6)
135 printed = 0;
136 seq_printf(seq, "NS IPv6 target/s (xx::xx form):");
137
138 for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) {
139 if (ipv6_addr_any(&bond->params.ns_targets[i]))
140 break;
141 if (printed)
142 seq_printf(seq, ",");
143 seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]);
144 printed = 1;
145 }
146 seq_printf(seq, "\n");
147 #endif
148 }
149
150 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
151 struct ad_info ad_info;
152
153 seq_puts(seq, "\n802.3ad info\n");
154 seq_printf(seq, "LACP active: %s\n",
155 (bond->params.lacp_active) ? "on" : "off");
156 seq_printf(seq, "LACP rate: %s\n",
157 (bond->params.lacp_fast) ? "fast" : "slow");
158 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
159 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
160 bond->params.ad_select);
161 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
162 optval->string);
163 if (capable(CAP_NET_ADMIN)) {
164 seq_printf(seq, "System priority: %d\n",
165 BOND_AD_INFO(bond).system.sys_priority);
166 seq_printf(seq, "System MAC address: %pM\n",
167 &BOND_AD_INFO(bond).system.sys_mac_addr);
168
169 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
170 seq_printf(seq,
171 "bond %s has no active aggregator\n",
172 bond->dev->name);
173 } else {
174 seq_printf(seq, "Active Aggregator Info:\n");
175
176 seq_printf(seq, "\tAggregator ID: %d\n",
177 ad_info.aggregator_id);
178 seq_printf(seq, "\tNumber of ports: %d\n",
179 ad_info.ports);
180 seq_printf(seq, "\tActor Key: %d\n",
181 ad_info.actor_key);
182 seq_printf(seq, "\tPartner Key: %d\n",
183 ad_info.partner_key);
184 seq_printf(seq, "\tPartner Mac Address: %pM\n",
185 ad_info.partner_system);
186 }
187 }
188 }
189 }
190
191 /* Note: runs under rcu_read_lock() */
bond_info_show_slave(struct seq_file * seq,const struct slave * slave)192 static void bond_info_show_slave(struct seq_file *seq,
193 const struct slave *slave)
194 {
195 struct bonding *bond = pde_data(file_inode(seq->file));
196
197 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
198 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
199 if (slave->speed == SPEED_UNKNOWN)
200 seq_printf(seq, "Speed: %s\n", "Unknown");
201 else
202 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
203
204 if (slave->duplex == DUPLEX_UNKNOWN)
205 seq_printf(seq, "Duplex: %s\n", "Unknown");
206 else
207 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
208
209 seq_printf(seq, "Link Failure Count: %u\n",
210 slave->link_failure_count);
211
212 seq_printf(seq, "Permanent HW addr: %*phC\n",
213 slave->dev->addr_len, slave->perm_hwaddr);
214 seq_printf(seq, "Slave queue ID: %d\n", READ_ONCE(slave->queue_id));
215
216 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
217 const struct port *port = &SLAVE_AD_INFO(slave)->port;
218 const struct aggregator *agg = rcu_dereference(port->aggregator);
219
220 if (agg) {
221 seq_printf(seq, "Aggregator ID: %d\n",
222 agg->aggregator_identifier);
223 seq_printf(seq, "Actor Churn State: %s\n",
224 bond_3ad_churn_desc(port->sm_churn_actor_state));
225 seq_printf(seq, "Partner Churn State: %s\n",
226 bond_3ad_churn_desc(port->sm_churn_partner_state));
227 seq_printf(seq, "Actor Churned Count: %d\n",
228 port->churn_actor_count);
229 seq_printf(seq, "Partner Churned Count: %d\n",
230 port->churn_partner_count);
231
232 if (capable(CAP_NET_ADMIN)) {
233 seq_puts(seq, "details actor lacp pdu:\n");
234 seq_printf(seq, " system priority: %d\n",
235 port->actor_system_priority);
236 seq_printf(seq, " system mac address: %pM\n",
237 &port->actor_system);
238 seq_printf(seq, " port key: %d\n",
239 port->actor_oper_port_key);
240 seq_printf(seq, " port priority: %d\n",
241 port->actor_port_priority);
242 seq_printf(seq, " port number: %d\n",
243 port->actor_port_number);
244 seq_printf(seq, " port state: %d\n",
245 port->actor_oper_port_state);
246
247 seq_puts(seq, "details partner lacp pdu:\n");
248 seq_printf(seq, " system priority: %d\n",
249 port->partner_oper.system_priority);
250 seq_printf(seq, " system mac address: %pM\n",
251 &port->partner_oper.system);
252 seq_printf(seq, " oper key: %d\n",
253 port->partner_oper.key);
254 seq_printf(seq, " port priority: %d\n",
255 port->partner_oper.port_priority);
256 seq_printf(seq, " port number: %d\n",
257 port->partner_oper.port_number);
258 seq_printf(seq, " port state: %d\n",
259 port->partner_oper.port_state);
260 }
261 } else {
262 seq_puts(seq, "Aggregator ID: N/A\n");
263 }
264 }
265 }
266
bond_info_seq_show(struct seq_file * seq,void * v)267 static int bond_info_seq_show(struct seq_file *seq, void *v)
268 {
269 if (v == SEQ_START_TOKEN) {
270 seq_printf(seq, "%s\n", bond_version);
271 bond_info_show_master(seq);
272 } else
273 bond_info_show_slave(seq, v);
274
275 return 0;
276 }
277
278 static const struct seq_operations bond_info_seq_ops = {
279 .start = bond_info_seq_start,
280 .next = bond_info_seq_next,
281 .stop = bond_info_seq_stop,
282 .show = bond_info_seq_show,
283 };
284
bond_create_proc_entry(struct bonding * bond)285 void bond_create_proc_entry(struct bonding *bond)
286 {
287 struct net_device *bond_dev = bond->dev;
288 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
289
290 if (bn->proc_dir) {
291 bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
292 bn->proc_dir, &bond_info_seq_ops, bond);
293 if (bond->proc_entry == NULL)
294 netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
295 KBUILD_MODNAME, bond_dev->name);
296 else
297 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
298 }
299 }
300
bond_remove_proc_entry(struct bonding * bond)301 void bond_remove_proc_entry(struct bonding *bond)
302 {
303 struct net_device *bond_dev = bond->dev;
304 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
305
306 if (bn->proc_dir && bond->proc_entry) {
307 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
308 memset(bond->proc_file_name, 0, IFNAMSIZ);
309 bond->proc_entry = NULL;
310 }
311 }
312
313 /* Create the bonding directory under /proc/net, if doesn't exist yet.
314 * Caller must hold rtnl_lock.
315 */
bond_create_proc_dir(struct bond_net * bn)316 void __net_init bond_create_proc_dir(struct bond_net *bn)
317 {
318 if (!bn->proc_dir) {
319 bn->proc_dir = proc_mkdir(KBUILD_MODNAME, bn->net->proc_net);
320 if (!bn->proc_dir)
321 pr_warn("Warning: Cannot create /proc/net/%s\n",
322 KBUILD_MODNAME);
323 }
324 }
325
326 /* Destroy the bonding directory under /proc/net, if empty.
327 */
bond_destroy_proc_dir(struct bond_net * bn)328 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
329 {
330 if (bn->proc_dir) {
331 remove_proc_entry(KBUILD_MODNAME, bn->net->proc_net);
332 bn->proc_dir = NULL;
333 }
334 }
335