aboutsummaryrefslogtreecommitdiff
path: root/net/wanrouter/wanproc.c
blob: f346395314ba8ba6ba9c3754c91bcf18b735b80f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
/*****************************************************************************
* wanproc.c	WAN Router Module. /proc filesystem interface.
*
*		This module is completely hardware-independent and provides
*		access to the router using Linux /proc filesystem.
*
* Author: 	Gideon Hack
*
* Copyright:	(c) 1995-1999 Sangoma Technologies Inc.
*
*		This program is free software; you can redistribute it and/or
*		modify it under the terms of the GNU General Public License
*		as published by the Free Software Foundation; either version
*		2 of the License, or (at your option) any later version.
* ============================================================================
* Jun 02, 1999  Gideon Hack	Updates for Linux 2.2.X kernels.
* Jun 29, 1997	Alan Cox	Merged with 1.0.3 vendor code
* Jan 29, 1997	Gene Kozin	v1.0.1. Implemented /proc read routines
* Jan 30, 1997	Alan Cox	Hacked around for 2.1
* Dec 13, 1996	Gene Kozin	Initial version (based on Sangoma's WANPIPE)
*****************************************************************************/

#include <linux/init.h>		/* __initfunc et al. */
#include <linux/stddef.h>	/* offsetof(), etc. */
#include <linux/errno.h>	/* return codes */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/wanrouter.h>	/* WAN router API definitions */
#include <linux/seq_file.h>
#include <linux/mutex.h>

#include <net/net_namespace.h>
#include <asm/io.h>

#define PROC_STATS_FORMAT "%30s: %12lu\n"

/****** Defines and Macros **************************************************/

#define PROT_DECODE(prot) ((prot == WANCONFIG_FR) ? " FR" :\
			      (prot == WANCONFIG_X25) ? " X25" : \
				 (prot == WANCONFIG_PPP) ? " PPP" : \
				    (prot == WANCONFIG_CHDLC) ? " CHDLC": \
				       (prot == WANCONFIG_MPPP) ? " MPPP" : \
					   " Unknown" )

/****** Function Prototypes *************************************************/

#ifdef CONFIG_PROC_FS

/* Miscellaneous */

/*
 *	Structures for interfacing with the /proc filesystem.
 *	Router creates its own directory /proc/net/router with the following
 *	entries:
 *	config		device configuration
 *	status		global device statistics
 *	<device>	entry for each WAN device
 */

/*
 *	Generic /proc/net/router/<file> file and inode operations
 */

/*
 *	/proc/net/router
 */

static DEFINE_MUTEX(config_mutex);
static struct proc_dir_entry *proc_router;

/* Strings */

/*
 *	Interface functions
 */

/****** Proc filesystem entry points ****************************************/

/*
 *	Iterator
 */
static void *r_start(struct seq_file *m, loff_t *pos)
	__acquires(kernel_lock)
{
	struct wan_device *wandev;
	loff_t l = *pos;

	mutex_lock(&config_mutex);
	if (!l--)
		return SEQ_START_TOKEN;
	for (wandev = wanrouter_router_devlist; l-- && wandev;
	     wandev = wandev->next)
		;
	return wandev;
}

static void *r_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct wan_device *wandev = v;
	(*pos)++;
	return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next;
}

static void r_stop(struct seq_file *m, void *v)
	__releases(kernel_lock)
{
	mutex_unlock(&config_mutex);
}

static int config_show(struct seq_file *m, void *v)
{
	struct wan_device *p = v;
	if (v == SEQ_START_TOKEN) {
		seq_puts(m, "Device name    | port |IRQ|DMA|  mem.addr  |"
			    "mem.size|option1|option2|option3|option4\n");
		return 0;
	}
	if (!p->state)
		return 0;
	seq_printf(m, "%-15s|0x%-4X|%3u|%3u| 0x%-8lX |0x%-6X|%7u|%7u|%7u|%7u\n",
			p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize,
			p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]);
	return 0;
}

static int status_show(struct seq_file *m, void *v)
{
	struct wan_device *p = v;
	if (v == SEQ_START_TOKEN) {
		seq_puts(m, "Device name    |protocol|station|interface|"
			    "clocking|baud rate| MTU |ndev|link state\n");
		return 0;
	}
	if (!p->state)
		return 0;
	seq_printf(m, "%-15s|%-8s| %-7s| %-9s|%-8s|%9u|%5u|%3u |",
		p->name,
		PROT_DECODE(p->config_id),
		p->config_id == WANCONFIG_FR ?
			(p->station ? "Node" : "CPE") :
			(p->config_id == WANCONFIG_X25 ?
			(p->station ? "DCE" : "DTE") :
			("N/A")),
		p->interface ? "V.35" : "RS-232",
		p->clocking ? "internal" : "external",
		p->bps,
		p->mtu,
		p->ndev);

	switch (p->state) {
	case WAN_UNCONFIGURED:
		seq_printf(m, "%-12s\n", "unconfigured");
		break;
	case WAN_DISCONNECTED:
		seq_printf(m, "%-12s\n", "disconnected");
		break;
	case WAN_CONNECTING:
		seq_printf(m, "%-12s\n", "connecting");
		break;
	case WAN_CONNECTED:
		seq_printf(m, "%-12s\n", "connected");
		break;
	default:
		seq_printf(m, "%-12s\n", "invalid");
		break;
	}
	return 0;
}

static const struct seq_operations config_op = {
	.start	= r_start,
	.next	= r_next,
	.stop	= r_stop,
	.show	= config_show,
};

static const struct seq_operations status_op = {
	.start	= r_start,
	.next	= r_next,
	.stop	= r_stop,
	.show	= status_show,
};

static int config_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &config_op);
}

static int status_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &status_op);
}

static const struct file_operations config_fops = {
	.owner	 = THIS_MODULE,
	.open	 = config_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release,
};

static const struct file_operations status_fops = {
	.owner	 = THIS_MODULE,
	.open	 = status_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release,
};

static int wandev_show(struct seq_file *m, void *v)
{
	struct wan_device *wandev = m->private;

	if (wandev->magic != ROUTER_MAGIC)
		return 0;

	if (!wandev->state) {
		seq_puts(m, "device is not configured!\n");
		return 0;
	}

	/* Update device statistics */
	if (wandev->update) {
		int err = wandev->update(wandev);
		if (err == -EAGAIN) {
			seq_puts(m, "Device is busy!\n");
			return 0;
		}
		if (err) {
			seq_puts(m, "Device is not configured!\n");
			return 0;
		}
	}

	seq_printf(m, PROC_STATS_FORMAT,
		"total packets received", wandev->stats.rx_packets);
	seq_printf(m, PROC_STATS_FORMAT,
		"total packets transmitted", wandev->stats.tx_packets);
	seq_printf(m, PROC_STATS_FORMAT,
		"total bytes received", wandev->stats.rx_bytes);
	seq_printf(m, PROC_STATS_FORMAT,
		"total bytes transmitted", wandev->stats.tx_bytes);
	seq_printf(m, PROC_STATS_FORMAT,
		"bad packets received", wandev->stats.rx_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"packet transmit problems", wandev->stats.tx_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"received frames dropped", wandev->stats.rx_dropped);
	seq_printf(m, PROC_STATS_FORMAT,
		"transmit frames dropped", wandev->stats.tx_dropped);
	seq_printf(m, PROC_STATS_FORMAT,
		"multicast packets received", wandev->stats.multicast);
	seq_printf(m, PROC_STATS_FORMAT,
		"transmit collisions", wandev->stats.collisions);
	seq_printf(m, PROC_STATS_FORMAT,
		"receive length errors", wandev->stats.rx_length_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"receiver overrun errors", wandev->stats.rx_over_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"CRC errors", wandev->stats.rx_crc_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"frame format errors (aborts)", wandev->stats.rx_frame_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"receiver fifo overrun", wandev->stats.rx_fifo_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"receiver missed packet", wandev->stats.rx_missed_errors);
	seq_printf(m, PROC_STATS_FORMAT,
		"aborted frames transmitted", wandev->stats.tx_aborted_errors);
	return 0;
}

static int wandev_open(struct inode *inode, struct file *file)
{
	return single_open(file, wandev_show, PDE(inode)->data);
}

static const struct file_operations wandev_fops = {
	.owner	 = THIS_MODULE,
	.open	 = wandev_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = single_release,
	.unlocked_ioctl  = wanrouter_ioctl,
};

/*
 *	Initialize router proc interface.
 */

int __init wanrouter_proc_init(void)
{
	struct proc_dir_entry *p;
	proc_router = proc_mkdir(ROUTER_NAME, init_net.proc_net);
	if (!proc_router)
		goto fail;

	p = proc_create("config", S_IRUGO, proc_router, &config_fops);
	if (!p)
		goto fail_config;
	p = proc_create("status", S_IRUGO, proc_router, &status_fops);
	if (!p)
		goto fail_stat;
	return 0;
fail_stat:
	remove_proc_entry("config", proc_router);
fail_config:
	remove_proc_entry(ROUTER_NAME, init_net.proc_net);
fail:
	return -ENOMEM;
}

/*
 *	Clean up router proc interface.
 */

void wanrouter_proc_cleanup(void)
{
	remove_proc_entry("config", proc_router);
	remove_proc_entry("status", proc_router);
	remove_proc_entry(ROUTER_NAME, init_net.proc_net);
}

/*
 *	Add directory entry for WAN device.
 */

int wanrouter_proc_add(struct wan_device* wandev)
{
	if (wandev->magic != ROUTER_MAGIC)
		return -EINVAL;

	wandev->dent = proc_create(wandev->name, S_IRUGO,
				   proc_router, &wandev_fops);
	if (!wandev->dent)
		return -ENOMEM;
	wandev->dent->data	= wandev;
	return 0;
}

/*
 *	Delete directory entry for WAN device.
 */
int wanrouter_proc_delete(struct wan_device* wandev)
{
	if (wandev->magic != ROUTER_MAGIC)
		return -EINVAL;
	remove_proc_entry(wandev->name, proc_router);
	return 0;
}

#else

/*
 *	No /proc - output stubs
 */

int __init wanrouter_proc_init(void)
{
	return 0;
}

void wanrouter_proc_cleanup(void)
{
}

int wanrouter_proc_add(struct wan_device *wandev)
{
	return 0;
}

int wanrouter_proc_delete(struct wan_device *wandev)
{
	return 0;
}

#endif

/*
 *	End
 */