1 /* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
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.
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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 #include <linux/debugfs.h>
25 #include "translation-table.h"
26 #include "originator.h"
27 #include "hard-interface.h"
28 #include "gateway_common.h"
29 #include "gateway_client.h"
30 #include "soft-interface.h"
32 #include "icmp_socket.h"
33 #include "bridge_loop_avoidance.h"
35 static struct dentry
*batadv_debugfs
;
37 #ifdef CONFIG_BATMAN_ADV_DEBUG
38 #define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)
40 static const int batadv_log_buff_len
= BATADV_LOG_BUF_LEN
;
42 static char *batadv_log_char_addr(struct batadv_debug_log
*debug_log
,
45 return &debug_log
->log_buff
[idx
& BATADV_LOG_BUFF_MASK
];
48 static void batadv_emit_log_char(struct batadv_debug_log
*debug_log
, char c
)
52 char_addr
= batadv_log_char_addr(debug_log
, debug_log
->log_end
);
56 if (debug_log
->log_end
- debug_log
->log_start
> batadv_log_buff_len
)
57 debug_log
->log_start
= debug_log
->log_end
- batadv_log_buff_len
;
61 static int batadv_fdebug_log(struct batadv_debug_log
*debug_log
,
65 static char debug_log_buf
[256];
71 spin_lock_bh(&debug_log
->lock
);
73 vscnprintf(debug_log_buf
, sizeof(debug_log_buf
), fmt
, args
);
76 for (p
= debug_log_buf
; *p
!= 0; p
++)
77 batadv_emit_log_char(debug_log
, *p
);
79 spin_unlock_bh(&debug_log
->lock
);
81 wake_up(&debug_log
->queue_wait
);
86 int batadv_debug_log(struct batadv_priv
*bat_priv
, const char *fmt
, ...)
89 char tmp_log_buf
[256];
92 vscnprintf(tmp_log_buf
, sizeof(tmp_log_buf
), fmt
, args
);
93 batadv_fdebug_log(bat_priv
->debug_log
, "[%10u] %s",
94 jiffies_to_msecs(jiffies
), tmp_log_buf
);
100 static int batadv_log_open(struct inode
*inode
, struct file
*file
)
102 nonseekable_open(inode
, file
);
103 file
->private_data
= inode
->i_private
;
104 batadv_inc_module_count();
108 static int batadv_log_release(struct inode
*inode
, struct file
*file
)
110 batadv_dec_module_count();
114 static int batadv_log_empty(struct batadv_debug_log
*debug_log
)
116 return !(debug_log
->log_start
- debug_log
->log_end
);
119 static ssize_t
batadv_log_read(struct file
*file
, char __user
*buf
,
120 size_t count
, loff_t
*ppos
)
122 struct batadv_priv
*bat_priv
= file
->private_data
;
123 struct batadv_debug_log
*debug_log
= bat_priv
->debug_log
;
128 if ((file
->f_flags
& O_NONBLOCK
) && batadv_log_empty(debug_log
))
137 if (!access_ok(VERIFY_WRITE
, buf
, count
))
140 error
= wait_event_interruptible(debug_log
->queue_wait
,
141 (!batadv_log_empty(debug_log
)));
146 spin_lock_bh(&debug_log
->lock
);
148 while ((!error
) && (i
< count
) &&
149 (debug_log
->log_start
!= debug_log
->log_end
)) {
150 char_addr
= batadv_log_char_addr(debug_log
,
151 debug_log
->log_start
);
154 debug_log
->log_start
++;
156 spin_unlock_bh(&debug_log
->lock
);
158 error
= __put_user(c
, buf
);
160 spin_lock_bh(&debug_log
->lock
);
167 spin_unlock_bh(&debug_log
->lock
);
175 static unsigned int batadv_log_poll(struct file
*file
, poll_table
*wait
)
177 struct batadv_priv
*bat_priv
= file
->private_data
;
178 struct batadv_debug_log
*debug_log
= bat_priv
->debug_log
;
180 poll_wait(file
, &debug_log
->queue_wait
, wait
);
182 if (!batadv_log_empty(debug_log
))
183 return POLLIN
| POLLRDNORM
;
188 static const struct file_operations batadv_log_fops
= {
189 .open
= batadv_log_open
,
190 .release
= batadv_log_release
,
191 .read
= batadv_log_read
,
192 .poll
= batadv_log_poll
,
196 static int batadv_debug_log_setup(struct batadv_priv
*bat_priv
)
200 if (!bat_priv
->debug_dir
)
203 bat_priv
->debug_log
= kzalloc(sizeof(*bat_priv
->debug_log
), GFP_ATOMIC
);
204 if (!bat_priv
->debug_log
)
207 spin_lock_init(&bat_priv
->debug_log
->lock
);
208 init_waitqueue_head(&bat_priv
->debug_log
->queue_wait
);
210 d
= debugfs_create_file("log", S_IFREG
| S_IRUSR
,
211 bat_priv
->debug_dir
, bat_priv
,
222 static void batadv_debug_log_cleanup(struct batadv_priv
*bat_priv
)
224 kfree(bat_priv
->debug_log
);
225 bat_priv
->debug_log
= NULL
;
227 #else /* CONFIG_BATMAN_ADV_DEBUG */
228 static int batadv_debug_log_setup(struct batadv_priv
*bat_priv
)
230 bat_priv
->debug_log
= NULL
;
234 static void batadv_debug_log_cleanup(struct batadv_priv
*bat_priv
)
240 static int batadv_algorithms_open(struct inode
*inode
, struct file
*file
)
242 return single_open(file
, batadv_algo_seq_print_text
, NULL
);
245 static int batadv_originators_open(struct inode
*inode
, struct file
*file
)
247 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
248 return single_open(file
, batadv_orig_seq_print_text
, net_dev
);
251 static int batadv_gateways_open(struct inode
*inode
, struct file
*file
)
253 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
254 return single_open(file
, batadv_gw_client_seq_print_text
, net_dev
);
257 static int batadv_transtable_global_open(struct inode
*inode
, struct file
*file
)
259 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
260 return single_open(file
, batadv_tt_global_seq_print_text
, net_dev
);
263 #ifdef CONFIG_BATMAN_ADV_BLA
264 static int batadv_bla_claim_table_open(struct inode
*inode
, struct file
*file
)
266 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
267 return single_open(file
, batadv_bla_claim_table_seq_print_text
,
272 static int batadv_transtable_local_open(struct inode
*inode
, struct file
*file
)
274 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
275 return single_open(file
, batadv_tt_local_seq_print_text
, net_dev
);
278 static int batadv_vis_data_open(struct inode
*inode
, struct file
*file
)
280 struct net_device
*net_dev
= (struct net_device
*)inode
->i_private
;
281 return single_open(file
, batadv_vis_seq_print_text
, net_dev
);
284 struct batadv_debuginfo
{
285 struct attribute attr
;
286 const struct file_operations fops
;
289 #define BATADV_DEBUGINFO(_name, _mode, _open) \
290 struct batadv_debuginfo batadv_debuginfo_##_name = { \
291 .attr = { .name = __stringify(_name), \
293 .fops = { .owner = THIS_MODULE, \
296 .llseek = seq_lseek, \
297 .release = single_release, \
301 static BATADV_DEBUGINFO(routing_algos
, S_IRUGO
, batadv_algorithms_open
);
302 static BATADV_DEBUGINFO(originators
, S_IRUGO
, batadv_originators_open
);
303 static BATADV_DEBUGINFO(gateways
, S_IRUGO
, batadv_gateways_open
);
304 static BATADV_DEBUGINFO(transtable_global
, S_IRUGO
,
305 batadv_transtable_global_open
);
306 #ifdef CONFIG_BATMAN_ADV_BLA
307 static BATADV_DEBUGINFO(bla_claim_table
, S_IRUGO
, batadv_bla_claim_table_open
);
309 static BATADV_DEBUGINFO(transtable_local
, S_IRUGO
,
310 batadv_transtable_local_open
);
311 static BATADV_DEBUGINFO(vis_data
, S_IRUGO
, batadv_vis_data_open
);
313 static struct batadv_debuginfo
*batadv_mesh_debuginfos
[] = {
314 &batadv_debuginfo_originators
,
315 &batadv_debuginfo_gateways
,
316 &batadv_debuginfo_transtable_global
,
317 #ifdef CONFIG_BATMAN_ADV_BLA
318 &batadv_debuginfo_bla_claim_table
,
320 &batadv_debuginfo_transtable_local
,
321 &batadv_debuginfo_vis_data
,
325 void batadv_debugfs_init(void)
327 struct batadv_debuginfo
*bat_debug
;
330 batadv_debugfs
= debugfs_create_dir(BATADV_DEBUGFS_SUBDIR
, NULL
);
331 if (batadv_debugfs
== ERR_PTR(-ENODEV
))
332 batadv_debugfs
= NULL
;
337 bat_debug
= &batadv_debuginfo_routing_algos
;
338 file
= debugfs_create_file(bat_debug
->attr
.name
,
339 S_IFREG
| bat_debug
->attr
.mode
,
340 batadv_debugfs
, NULL
, &bat_debug
->fops
);
342 pr_err("Can't add debugfs file: %s\n", bat_debug
->attr
.name
);
348 void batadv_debugfs_destroy(void)
350 if (batadv_debugfs
) {
351 debugfs_remove_recursive(batadv_debugfs
);
352 batadv_debugfs
= NULL
;
356 int batadv_debugfs_add_meshif(struct net_device
*dev
)
358 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
359 struct batadv_debuginfo
**bat_debug
;
365 bat_priv
->debug_dir
= debugfs_create_dir(dev
->name
, batadv_debugfs
);
366 if (!bat_priv
->debug_dir
)
369 if (batadv_socket_setup(bat_priv
) < 0)
372 if (batadv_debug_log_setup(bat_priv
) < 0)
375 for (bat_debug
= batadv_mesh_debuginfos
; *bat_debug
; ++bat_debug
) {
376 file
= debugfs_create_file(((*bat_debug
)->attr
).name
,
377 S_IFREG
| ((*bat_debug
)->attr
).mode
,
379 dev
, &(*bat_debug
)->fops
);
381 batadv_err(dev
, "Can't add debugfs file: %s/%s\n",
382 dev
->name
, ((*bat_debug
)->attr
).name
);
389 debugfs_remove_recursive(bat_priv
->debug_dir
);
390 bat_priv
->debug_dir
= NULL
;
392 #ifdef CONFIG_DEBUG_FS
396 #endif /* CONFIG_DEBUG_FS */
399 void batadv_debugfs_del_meshif(struct net_device
*dev
)
401 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
403 batadv_debug_log_cleanup(bat_priv
);
405 if (batadv_debugfs
) {
406 debugfs_remove_recursive(bat_priv
->debug_dir
);
407 bat_priv
->debug_dir
= NULL
;