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