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