c32ff55a34c1e2331d05995d0626ff3dbc0ab418
[linux-2.6.git] / drivers / net / bonding / bond_procfs.c
1 #include <linux/proc_fs.h>
2 #include <net/net_namespace.h>
3 #include <net/netns/generic.h>
4 #include "bonding.h"
5
6
7 extern const char *bond_mode_name(int mode);
8
9 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
10         __acquires(RCU)
11         __acquires(&bond->lock)
12 {
13         struct bonding *bond = seq->private;
14         loff_t off = 0;
15         struct slave *slave;
16         int i;
17
18         /* make sure the bond won't be taken away */
19         rcu_read_lock();
20         read_lock(&bond->lock);
21
22         if (*pos == 0)
23                 return SEQ_START_TOKEN;
24
25         bond_for_each_slave(bond, slave, i) {
26                 if (++off == *pos)
27                         return slave;
28         }
29
30         return NULL;
31 }
32
33 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
34 {
35         struct bonding *bond = seq->private;
36         struct slave *slave = v;
37
38         ++*pos;
39         if (v == SEQ_START_TOKEN)
40                 return bond->first_slave;
41
42         slave = slave->next;
43
44         return (slave == bond->first_slave) ? NULL : slave;
45 }
46
47 static void bond_info_seq_stop(struct seq_file *seq, void *v)
48         __releases(&bond->lock)
49         __releases(RCU)
50 {
51         struct bonding *bond = seq->private;
52
53         read_unlock(&bond->lock);
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         struct slave *curr;
61         int i;
62
63         read_lock(&bond->curr_slave_lock);
64         curr = bond->curr_active_slave;
65         read_unlock(&bond->curr_slave_lock);
66
67         seq_printf(seq, "Bonding Mode: %s",
68                    bond_mode_name(bond->params.mode));
69
70         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
71             bond->params.fail_over_mac)
72                 seq_printf(seq, " (fail_over_mac %s)",
73                    fail_over_mac_tbl[bond->params.fail_over_mac].modename);
74
75         seq_printf(seq, "\n");
76
77         if (bond->params.mode == BOND_MODE_XOR ||
78                 bond->params.mode == BOND_MODE_8023AD) {
79                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
80                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
81                         bond->params.xmit_policy);
82         }
83
84         if (USES_PRIMARY(bond->params.mode)) {
85                 seq_printf(seq, "Primary Slave: %s",
86                            (bond->primary_slave) ?
87                            bond->primary_slave->dev->name : "None");
88                 if (bond->primary_slave)
89                         seq_printf(seq, " (primary_reselect %s)",
90                    pri_reselect_tbl[bond->params.primary_reselect].modename);
91
92                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
93                            (curr) ? curr->dev->name : "None");
94         }
95
96         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
97                    "up" : "down");
98         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
99         seq_printf(seq, "Up Delay (ms): %d\n",
100                    bond->params.updelay * bond->params.miimon);
101         seq_printf(seq, "Down Delay (ms): %d\n",
102                    bond->params.downdelay * bond->params.miimon);
103
104
105         /* ARP information */
106         if (bond->params.arp_interval > 0) {
107                 int printed = 0;
108                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
109                                 bond->params.arp_interval);
110
111                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
112
113                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
114                         if (!bond->params.arp_targets[i])
115                                 break;
116                         if (printed)
117                                 seq_printf(seq, ",");
118                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
119                         printed = 1;
120                 }
121                 seq_printf(seq, "\n");
122         }
123
124         if (bond->params.mode == BOND_MODE_8023AD) {
125                 struct ad_info ad_info;
126
127                 seq_puts(seq, "\n802.3ad info\n");
128                 seq_printf(seq, "LACP rate: %s\n",
129                            (bond->params.lacp_fast) ? "fast" : "slow");
130                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
131                            ad_select_tbl[bond->params.ad_select].modename);
132
133                 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
134                         seq_printf(seq, "bond %s has no active aggregator\n",
135                                    bond->dev->name);
136                 } else {
137                         seq_printf(seq, "Active Aggregator Info:\n");
138
139                         seq_printf(seq, "\tAggregator ID: %d\n",
140                                    ad_info.aggregator_id);
141                         seq_printf(seq, "\tNumber of ports: %d\n",
142                                    ad_info.ports);
143                         seq_printf(seq, "\tActor Key: %d\n",
144                                    ad_info.actor_key);
145                         seq_printf(seq, "\tPartner Key: %d\n",
146                                    ad_info.partner_key);
147                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
148                                    ad_info.partner_system);
149                 }
150         }
151 }
152
153 static void bond_info_show_slave(struct seq_file *seq,
154                                  const struct slave *slave)
155 {
156         struct bonding *bond = seq->private;
157
158         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
159         seq_printf(seq, "MII Status: %s\n",
160                    (slave->link == BOND_LINK_UP) ?  "up" : "down");
161         seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
162         seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
163         seq_printf(seq, "Link Failure Count: %u\n",
164                    slave->link_failure_count);
165
166         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
167
168         if (bond->params.mode == BOND_MODE_8023AD) {
169                 const struct aggregator *agg
170                         = SLAVE_AD_INFO(slave).port.aggregator;
171
172                 if (agg)
173                         seq_printf(seq, "Aggregator ID: %d\n",
174                                    agg->aggregator_identifier);
175                 else
176                         seq_puts(seq, "Aggregator ID: N/A\n");
177         }
178         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
179 }
180
181 static int bond_info_seq_show(struct seq_file *seq, void *v)
182 {
183         if (v == SEQ_START_TOKEN) {
184                 seq_printf(seq, "%s\n", bond_version);
185                 bond_info_show_master(seq);
186         } else
187                 bond_info_show_slave(seq, v);
188
189         return 0;
190 }
191
192 static const struct seq_operations bond_info_seq_ops = {
193         .start = bond_info_seq_start,
194         .next  = bond_info_seq_next,
195         .stop  = bond_info_seq_stop,
196         .show  = bond_info_seq_show,
197 };
198
199 static int bond_info_open(struct inode *inode, struct file *file)
200 {
201         struct seq_file *seq;
202         struct proc_dir_entry *proc;
203         int res;
204
205         res = seq_open(file, &bond_info_seq_ops);
206         if (!res) {
207                 /* recover the pointer buried in proc_dir_entry data */
208                 seq = file->private_data;
209                 proc = PDE(inode);
210                 seq->private = proc->data;
211         }
212
213         return res;
214 }
215
216 static const struct file_operations bond_info_fops = {
217         .owner   = THIS_MODULE,
218         .open    = bond_info_open,
219         .read    = seq_read,
220         .llseek  = seq_lseek,
221         .release = seq_release,
222 };
223
224 void bond_create_proc_entry(struct bonding *bond)
225 {
226         struct net_device *bond_dev = bond->dev;
227         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
228
229         if (bn->proc_dir) {
230                 bond->proc_entry = proc_create_data(bond_dev->name,
231                                                     S_IRUGO, bn->proc_dir,
232                                                     &bond_info_fops, bond);
233                 if (bond->proc_entry == NULL)
234                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
235                                    DRV_NAME, bond_dev->name);
236                 else
237                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
238         }
239 }
240
241 void bond_remove_proc_entry(struct bonding *bond)
242 {
243         struct net_device *bond_dev = bond->dev;
244         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
245
246         if (bn->proc_dir && bond->proc_entry) {
247                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
248                 memset(bond->proc_file_name, 0, IFNAMSIZ);
249                 bond->proc_entry = NULL;
250         }
251 }
252
253 /* Create the bonding directory under /proc/net, if doesn't exist yet.
254  * Caller must hold rtnl_lock.
255  */
256 void __net_init bond_create_proc_dir(struct bond_net *bn)
257 {
258         if (!bn->proc_dir) {
259                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
260                 if (!bn->proc_dir)
261                         pr_warning("Warning: cannot create /proc/net/%s\n",
262                                    DRV_NAME);
263         }
264 }
265
266 /* Destroy the bonding directory under /proc/net, if empty.
267  * Caller must hold rtnl_lock.
268  */
269 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
270 {
271         if (bn->proc_dir) {
272                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
273                 bn->proc_dir = NULL;
274         }
275 }