Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-avs'
[cascardo/linux.git] / net / batman-adv / debugfs.c
1 /* Copyright (C) 2010-2016  B.A.T.M.A.N. contributors:
2  *
3  * Marek Lindner
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of version 2 of the GNU General Public
7  * License as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
16  */
17
18 #include "debugfs.h"
19 #include "main.h"
20
21 #include <linux/debugfs.h>
22 #include <linux/device.h>
23 #include <linux/errno.h>
24 #include <linux/export.h>
25 #include <linux/fs.h>
26 #include <linux/netdevice.h>
27 #include <linux/printk.h>
28 #include <linux/sched.h> /* for linux/wait.h */
29 #include <linux/seq_file.h>
30 #include <linux/stat.h>
31 #include <linux/stddef.h>
32 #include <linux/stringify.h>
33 #include <linux/sysfs.h>
34
35 #include "bat_algo.h"
36 #include "bridge_loop_avoidance.h"
37 #include "distributed-arp-table.h"
38 #include "gateway_client.h"
39 #include "icmp_socket.h"
40 #include "log.h"
41 #include "multicast.h"
42 #include "network-coding.h"
43 #include "originator.h"
44 #include "translation-table.h"
45
46 static struct dentry *batadv_debugfs;
47
48 static int batadv_algorithms_open(struct inode *inode, struct file *file)
49 {
50         return single_open(file, batadv_algo_seq_print_text, NULL);
51 }
52
53 static int neighbors_open(struct inode *inode, struct file *file)
54 {
55         struct net_device *net_dev = (struct net_device *)inode->i_private;
56
57         return single_open(file, batadv_hardif_neigh_seq_print_text, net_dev);
58 }
59
60 static int batadv_originators_open(struct inode *inode, struct file *file)
61 {
62         struct net_device *net_dev = (struct net_device *)inode->i_private;
63
64         return single_open(file, batadv_orig_seq_print_text, net_dev);
65 }
66
67 /**
68  * batadv_originators_hardif_open - handles debugfs output for the
69  *  originator table of an hard interface
70  * @inode: inode pointer to debugfs file
71  * @file: pointer to the seq_file
72  *
73  * Return: 0 on success or negative error number in case of failure
74  */
75 static int batadv_originators_hardif_open(struct inode *inode,
76                                           struct file *file)
77 {
78         struct net_device *net_dev = (struct net_device *)inode->i_private;
79
80         return single_open(file, batadv_orig_hardif_seq_print_text, net_dev);
81 }
82
83 static int batadv_gateways_open(struct inode *inode, struct file *file)
84 {
85         struct net_device *net_dev = (struct net_device *)inode->i_private;
86
87         return single_open(file, batadv_gw_client_seq_print_text, net_dev);
88 }
89
90 static int batadv_transtable_global_open(struct inode *inode, struct file *file)
91 {
92         struct net_device *net_dev = (struct net_device *)inode->i_private;
93
94         return single_open(file, batadv_tt_global_seq_print_text, net_dev);
95 }
96
97 #ifdef CONFIG_BATMAN_ADV_BLA
98 static int batadv_bla_claim_table_open(struct inode *inode, struct file *file)
99 {
100         struct net_device *net_dev = (struct net_device *)inode->i_private;
101
102         return single_open(file, batadv_bla_claim_table_seq_print_text,
103                            net_dev);
104 }
105
106 static int batadv_bla_backbone_table_open(struct inode *inode,
107                                           struct file *file)
108 {
109         struct net_device *net_dev = (struct net_device *)inode->i_private;
110
111         return single_open(file, batadv_bla_backbone_table_seq_print_text,
112                            net_dev);
113 }
114
115 #endif
116
117 #ifdef CONFIG_BATMAN_ADV_DAT
118 /**
119  * batadv_dat_cache_open - Prepare file handler for reads from dat_chache
120  * @inode: inode which was opened
121  * @file: file handle to be initialized
122  *
123  * Return: 0 on success or negative error number in case of failure
124  */
125 static int batadv_dat_cache_open(struct inode *inode, struct file *file)
126 {
127         struct net_device *net_dev = (struct net_device *)inode->i_private;
128
129         return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
130 }
131 #endif
132
133 static int batadv_transtable_local_open(struct inode *inode, struct file *file)
134 {
135         struct net_device *net_dev = (struct net_device *)inode->i_private;
136
137         return single_open(file, batadv_tt_local_seq_print_text, net_dev);
138 }
139
140 struct batadv_debuginfo {
141         struct attribute attr;
142         const struct file_operations fops;
143 };
144
145 #ifdef CONFIG_BATMAN_ADV_NC
146 static int batadv_nc_nodes_open(struct inode *inode, struct file *file)
147 {
148         struct net_device *net_dev = (struct net_device *)inode->i_private;
149
150         return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
151 }
152 #endif
153
154 #ifdef CONFIG_BATMAN_ADV_MCAST
155 /**
156  * batadv_mcast_flags_open - prepare file handler for reads from mcast_flags
157  * @inode: inode which was opened
158  * @file: file handle to be initialized
159  *
160  * Return: 0 on success or negative error number in case of failure
161  */
162 static int batadv_mcast_flags_open(struct inode *inode, struct file *file)
163 {
164         struct net_device *net_dev = (struct net_device *)inode->i_private;
165
166         return single_open(file, batadv_mcast_flags_seq_print_text, net_dev);
167 }
168 #endif
169
170 #define BATADV_DEBUGINFO(_name, _mode, _open)           \
171 struct batadv_debuginfo batadv_debuginfo_##_name = {    \
172         .attr = {                                       \
173                 .name = __stringify(_name),             \
174                 .mode = _mode,                          \
175         },                                              \
176         .fops = {                                       \
177                 .owner = THIS_MODULE,                   \
178                 .open = _open,                          \
179                 .read   = seq_read,                     \
180                 .llseek = seq_lseek,                    \
181                 .release = single_release,              \
182         },                                              \
183 }
184
185 /* the following attributes are general and therefore they will be directly
186  * placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
187  */
188 static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
189
190 static struct batadv_debuginfo *batadv_general_debuginfos[] = {
191         &batadv_debuginfo_routing_algos,
192         NULL,
193 };
194
195 /* The following attributes are per soft interface */
196 static BATADV_DEBUGINFO(neighbors, S_IRUGO, neighbors_open);
197 static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
198 static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
199 static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
200                         batadv_transtable_global_open);
201 #ifdef CONFIG_BATMAN_ADV_BLA
202 static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
203 static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
204                         batadv_bla_backbone_table_open);
205 #endif
206 #ifdef CONFIG_BATMAN_ADV_DAT
207 static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
208 #endif
209 static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
210                         batadv_transtable_local_open);
211 #ifdef CONFIG_BATMAN_ADV_NC
212 static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
213 #endif
214 #ifdef CONFIG_BATMAN_ADV_MCAST
215 static BATADV_DEBUGINFO(mcast_flags, S_IRUGO, batadv_mcast_flags_open);
216 #endif
217
218 static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
219         &batadv_debuginfo_neighbors,
220         &batadv_debuginfo_originators,
221         &batadv_debuginfo_gateways,
222         &batadv_debuginfo_transtable_global,
223 #ifdef CONFIG_BATMAN_ADV_BLA
224         &batadv_debuginfo_bla_claim_table,
225         &batadv_debuginfo_bla_backbone_table,
226 #endif
227 #ifdef CONFIG_BATMAN_ADV_DAT
228         &batadv_debuginfo_dat_cache,
229 #endif
230         &batadv_debuginfo_transtable_local,
231 #ifdef CONFIG_BATMAN_ADV_NC
232         &batadv_debuginfo_nc_nodes,
233 #endif
234 #ifdef CONFIG_BATMAN_ADV_MCAST
235         &batadv_debuginfo_mcast_flags,
236 #endif
237         NULL,
238 };
239
240 #define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open)            \
241 struct batadv_debuginfo batadv_hardif_debuginfo_##_name = {     \
242         .attr = {                                               \
243                 .name = __stringify(_name),                     \
244                 .mode = _mode,                                  \
245         },                                                      \
246         .fops = {                                               \
247                 .owner = THIS_MODULE,                           \
248                 .open = _open,                                  \
249                 .read   = seq_read,                             \
250                 .llseek = seq_lseek,                            \
251                 .release = single_release,                      \
252         },                                                      \
253 }
254
255 static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
256                                batadv_originators_hardif_open);
257
258 static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
259         &batadv_hardif_debuginfo_originators,
260         NULL,
261 };
262
263 void batadv_debugfs_init(void)
264 {
265         struct batadv_debuginfo **bat_debug;
266         struct dentry *file;
267
268         batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
269         if (batadv_debugfs == ERR_PTR(-ENODEV))
270                 batadv_debugfs = NULL;
271
272         if (!batadv_debugfs)
273                 goto err;
274
275         for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
276                 file = debugfs_create_file(((*bat_debug)->attr).name,
277                                            S_IFREG | ((*bat_debug)->attr).mode,
278                                            batadv_debugfs, NULL,
279                                            &(*bat_debug)->fops);
280                 if (!file) {
281                         pr_err("Can't add general debugfs file: %s\n",
282                                ((*bat_debug)->attr).name);
283                         goto err;
284                 }
285         }
286
287         return;
288 err:
289         debugfs_remove_recursive(batadv_debugfs);
290         batadv_debugfs = NULL;
291 }
292
293 void batadv_debugfs_destroy(void)
294 {
295         debugfs_remove_recursive(batadv_debugfs);
296         batadv_debugfs = NULL;
297 }
298
299 /**
300  * batadv_debugfs_add_hardif - creates the base directory for a hard interface
301  *  in debugfs.
302  * @hard_iface: hard interface which should be added.
303  *
304  * Return: 0 on success or negative error number in case of failure
305  */
306 int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
307 {
308         struct batadv_debuginfo **bat_debug;
309         struct dentry *file;
310
311         if (!batadv_debugfs)
312                 goto out;
313
314         hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name,
315                                                    batadv_debugfs);
316         if (!hard_iface->debug_dir)
317                 goto out;
318
319         for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) {
320                 file = debugfs_create_file(((*bat_debug)->attr).name,
321                                            S_IFREG | ((*bat_debug)->attr).mode,
322                                            hard_iface->debug_dir,
323                                            hard_iface->net_dev,
324                                            &(*bat_debug)->fops);
325                 if (!file)
326                         goto rem_attr;
327         }
328
329         return 0;
330 rem_attr:
331         debugfs_remove_recursive(hard_iface->debug_dir);
332         hard_iface->debug_dir = NULL;
333 out:
334         return -ENOMEM;
335 }
336
337 /**
338  * batadv_debugfs_del_hardif - delete the base directory for a hard interface
339  *  in debugfs.
340  * @hard_iface: hard interface which is deleted.
341  */
342 void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
343 {
344         if (batadv_debugfs) {
345                 debugfs_remove_recursive(hard_iface->debug_dir);
346                 hard_iface->debug_dir = NULL;
347         }
348 }
349
350 int batadv_debugfs_add_meshif(struct net_device *dev)
351 {
352         struct batadv_priv *bat_priv = netdev_priv(dev);
353         struct batadv_debuginfo **bat_debug;
354         struct dentry *file;
355
356         if (!batadv_debugfs)
357                 goto out;
358
359         bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
360         if (!bat_priv->debug_dir)
361                 goto out;
362
363         if (batadv_socket_setup(bat_priv) < 0)
364                 goto rem_attr;
365
366         if (batadv_debug_log_setup(bat_priv) < 0)
367                 goto rem_attr;
368
369         for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) {
370                 file = debugfs_create_file(((*bat_debug)->attr).name,
371                                            S_IFREG | ((*bat_debug)->attr).mode,
372                                            bat_priv->debug_dir,
373                                            dev, &(*bat_debug)->fops);
374                 if (!file) {
375                         batadv_err(dev, "Can't add debugfs file: %s/%s\n",
376                                    dev->name, ((*bat_debug)->attr).name);
377                         goto rem_attr;
378                 }
379         }
380
381         if (batadv_nc_init_debugfs(bat_priv) < 0)
382                 goto rem_attr;
383
384         return 0;
385 rem_attr:
386         debugfs_remove_recursive(bat_priv->debug_dir);
387         bat_priv->debug_dir = NULL;
388 out:
389         return -ENOMEM;
390 }
391
392 void batadv_debugfs_del_meshif(struct net_device *dev)
393 {
394         struct batadv_priv *bat_priv = netdev_priv(dev);
395
396         batadv_debug_log_cleanup(bat_priv);
397
398         if (batadv_debugfs) {
399                 debugfs_remove_recursive(bat_priv->debug_dir);
400                 bat_priv->debug_dir = NULL;
401         }
402 }