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