wanrouter: Remove kernel_lock annotations
[linux-2.6.git] / net / wanrouter / wanproc.c
1 /*****************************************************************************
2 * wanproc.c     WAN Router Module. /proc filesystem interface.
3 *
4 *               This module is completely hardware-independent and provides
5 *               access to the router using Linux /proc filesystem.
6 *
7 * Author:       Gideon Hack
8 *
9 * Copyright:    (c) 1995-1999 Sangoma Technologies Inc.
10 *
11 *               This program is free software; you can redistribute it and/or
12 *               modify it under the terms of the GNU General Public License
13 *               as published by the Free Software Foundation; either version
14 *               2 of the License, or (at your option) any later version.
15 * ============================================================================
16 * Jun 02, 1999  Gideon Hack     Updates for Linux 2.2.X kernels.
17 * Jun 29, 1997  Alan Cox        Merged with 1.0.3 vendor code
18 * Jan 29, 1997  Gene Kozin      v1.0.1. Implemented /proc read routines
19 * Jan 30, 1997  Alan Cox        Hacked around for 2.1
20 * Dec 13, 1996  Gene Kozin      Initial version (based on Sangoma's WANPIPE)
21 *****************************************************************************/
22
23 #include <linux/init.h>         /* __initfunc et al. */
24 #include <linux/stddef.h>       /* offsetof(), etc. */
25 #include <linux/errno.h>        /* return codes */
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/wanrouter.h>    /* WAN router API definitions */
29 #include <linux/seq_file.h>
30 #include <linux/mutex.h>
31
32 #include <net/net_namespace.h>
33 #include <asm/io.h>
34
35 #define PROC_STATS_FORMAT "%30s: %12lu\n"
36
37 /****** Defines and Macros **************************************************/
38
39 #define PROT_DECODE(prot) ((prot == WANCONFIG_FR) ? " FR" :\
40                               (prot == WANCONFIG_X25) ? " X25" : \
41                                  (prot == WANCONFIG_PPP) ? " PPP" : \
42                                     (prot == WANCONFIG_CHDLC) ? " CHDLC": \
43                                        (prot == WANCONFIG_MPPP) ? " MPPP" : \
44                                            " Unknown" )
45
46 /****** Function Prototypes *************************************************/
47
48 #ifdef CONFIG_PROC_FS
49
50 /* Miscellaneous */
51
52 /*
53  *      Structures for interfacing with the /proc filesystem.
54  *      Router creates its own directory /proc/net/router with the following
55  *      entries:
56  *      config          device configuration
57  *      status          global device statistics
58  *      <device>        entry for each WAN device
59  */
60
61 /*
62  *      Generic /proc/net/router/<file> file and inode operations
63  */
64
65 /*
66  *      /proc/net/router
67  */
68
69 static DEFINE_MUTEX(config_mutex);
70 static struct proc_dir_entry *proc_router;
71
72 /* Strings */
73
74 /*
75  *      Interface functions
76  */
77
78 /****** Proc filesystem entry points ****************************************/
79
80 /*
81  *      Iterator
82  */
83 static void *r_start(struct seq_file *m, loff_t *pos)
84 {
85         struct wan_device *wandev;
86         loff_t l = *pos;
87
88         mutex_lock(&config_mutex);
89         if (!l--)
90                 return SEQ_START_TOKEN;
91         for (wandev = wanrouter_router_devlist; l-- && wandev;
92              wandev = wandev->next)
93                 ;
94         return wandev;
95 }
96
97 static void *r_next(struct seq_file *m, void *v, loff_t *pos)
98 {
99         struct wan_device *wandev = v;
100         (*pos)++;
101         return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next;
102 }
103
104 static void r_stop(struct seq_file *m, void *v)
105 {
106         mutex_unlock(&config_mutex);
107 }
108
109 static int config_show(struct seq_file *m, void *v)
110 {
111         struct wan_device *p = v;
112         if (v == SEQ_START_TOKEN) {
113                 seq_puts(m, "Device name    | port |IRQ|DMA|  mem.addr  |"
114                             "mem.size|option1|option2|option3|option4\n");
115                 return 0;
116         }
117         if (!p->state)
118                 return 0;
119         seq_printf(m, "%-15s|0x%-4X|%3u|%3u| 0x%-8lX |0x%-6X|%7u|%7u|%7u|%7u\n",
120                         p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize,
121                         p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]);
122         return 0;
123 }
124
125 static int status_show(struct seq_file *m, void *v)
126 {
127         struct wan_device *p = v;
128         if (v == SEQ_START_TOKEN) {
129                 seq_puts(m, "Device name    |protocol|station|interface|"
130                             "clocking|baud rate| MTU |ndev|link state\n");
131                 return 0;
132         }
133         if (!p->state)
134                 return 0;
135         seq_printf(m, "%-15s|%-8s| %-7s| %-9s|%-8s|%9u|%5u|%3u |",
136                 p->name,
137                 PROT_DECODE(p->config_id),
138                 p->config_id == WANCONFIG_FR ?
139                         (p->station ? "Node" : "CPE") :
140                         (p->config_id == WANCONFIG_X25 ?
141                         (p->station ? "DCE" : "DTE") :
142                         ("N/A")),
143                 p->interface ? "V.35" : "RS-232",
144                 p->clocking ? "internal" : "external",
145                 p->bps,
146                 p->mtu,
147                 p->ndev);
148
149         switch (p->state) {
150         case WAN_UNCONFIGURED:
151                 seq_printf(m, "%-12s\n", "unconfigured");
152                 break;
153         case WAN_DISCONNECTED:
154                 seq_printf(m, "%-12s\n", "disconnected");
155                 break;
156         case WAN_CONNECTING:
157                 seq_printf(m, "%-12s\n", "connecting");
158                 break;
159         case WAN_CONNECTED:
160                 seq_printf(m, "%-12s\n", "connected");
161                 break;
162         default:
163                 seq_printf(m, "%-12s\n", "invalid");
164                 break;
165         }
166         return 0;
167 }
168
169 static const struct seq_operations config_op = {
170         .start  = r_start,
171         .next   = r_next,
172         .stop   = r_stop,
173         .show   = config_show,
174 };
175
176 static const struct seq_operations status_op = {
177         .start  = r_start,
178         .next   = r_next,
179         .stop   = r_stop,
180         .show   = status_show,
181 };
182
183 static int config_open(struct inode *inode, struct file *file)
184 {
185         return seq_open(file, &config_op);
186 }
187
188 static int status_open(struct inode *inode, struct file *file)
189 {
190         return seq_open(file, &status_op);
191 }
192
193 static const struct file_operations config_fops = {
194         .owner   = THIS_MODULE,
195         .open    = config_open,
196         .read    = seq_read,
197         .llseek  = seq_lseek,
198         .release = seq_release,
199 };
200
201 static const struct file_operations status_fops = {
202         .owner   = THIS_MODULE,
203         .open    = status_open,
204         .read    = seq_read,
205         .llseek  = seq_lseek,
206         .release = seq_release,
207 };
208
209 static int wandev_show(struct seq_file *m, void *v)
210 {
211         struct wan_device *wandev = m->private;
212
213         if (wandev->magic != ROUTER_MAGIC)
214                 return 0;
215
216         if (!wandev->state) {
217                 seq_puts(m, "device is not configured!\n");
218                 return 0;
219         }
220
221         /* Update device statistics */
222         if (wandev->update) {
223                 int err = wandev->update(wandev);
224                 if (err == -EAGAIN) {
225                         seq_puts(m, "Device is busy!\n");
226                         return 0;
227                 }
228                 if (err) {
229                         seq_puts(m, "Device is not configured!\n");
230                         return 0;
231                 }
232         }
233
234         seq_printf(m, PROC_STATS_FORMAT,
235                 "total packets received", wandev->stats.rx_packets);
236         seq_printf(m, PROC_STATS_FORMAT,
237                 "total packets transmitted", wandev->stats.tx_packets);
238         seq_printf(m, PROC_STATS_FORMAT,
239                 "total bytes received", wandev->stats.rx_bytes);
240         seq_printf(m, PROC_STATS_FORMAT,
241                 "total bytes transmitted", wandev->stats.tx_bytes);
242         seq_printf(m, PROC_STATS_FORMAT,
243                 "bad packets received", wandev->stats.rx_errors);
244         seq_printf(m, PROC_STATS_FORMAT,
245                 "packet transmit problems", wandev->stats.tx_errors);
246         seq_printf(m, PROC_STATS_FORMAT,
247                 "received frames dropped", wandev->stats.rx_dropped);
248         seq_printf(m, PROC_STATS_FORMAT,
249                 "transmit frames dropped", wandev->stats.tx_dropped);
250         seq_printf(m, PROC_STATS_FORMAT,
251                 "multicast packets received", wandev->stats.multicast);
252         seq_printf(m, PROC_STATS_FORMAT,
253                 "transmit collisions", wandev->stats.collisions);
254         seq_printf(m, PROC_STATS_FORMAT,
255                 "receive length errors", wandev->stats.rx_length_errors);
256         seq_printf(m, PROC_STATS_FORMAT,
257                 "receiver overrun errors", wandev->stats.rx_over_errors);
258         seq_printf(m, PROC_STATS_FORMAT,
259                 "CRC errors", wandev->stats.rx_crc_errors);
260         seq_printf(m, PROC_STATS_FORMAT,
261                 "frame format errors (aborts)", wandev->stats.rx_frame_errors);
262         seq_printf(m, PROC_STATS_FORMAT,
263                 "receiver fifo overrun", wandev->stats.rx_fifo_errors);
264         seq_printf(m, PROC_STATS_FORMAT,
265                 "receiver missed packet", wandev->stats.rx_missed_errors);
266         seq_printf(m, PROC_STATS_FORMAT,
267                 "aborted frames transmitted", wandev->stats.tx_aborted_errors);
268         return 0;
269 }
270
271 static int wandev_open(struct inode *inode, struct file *file)
272 {
273         return single_open(file, wandev_show, PDE(inode)->data);
274 }
275
276 static const struct file_operations wandev_fops = {
277         .owner   = THIS_MODULE,
278         .open    = wandev_open,
279         .read    = seq_read,
280         .llseek  = seq_lseek,
281         .release = single_release,
282         .unlocked_ioctl  = wanrouter_ioctl,
283 };
284
285 /*
286  *      Initialize router proc interface.
287  */
288
289 int __init wanrouter_proc_init(void)
290 {
291         struct proc_dir_entry *p;
292         proc_router = proc_mkdir(ROUTER_NAME, init_net.proc_net);
293         if (!proc_router)
294                 goto fail;
295
296         p = proc_create("config", S_IRUGO, proc_router, &config_fops);
297         if (!p)
298                 goto fail_config;
299         p = proc_create("status", S_IRUGO, proc_router, &status_fops);
300         if (!p)
301                 goto fail_stat;
302         return 0;
303 fail_stat:
304         remove_proc_entry("config", proc_router);
305 fail_config:
306         remove_proc_entry(ROUTER_NAME, init_net.proc_net);
307 fail:
308         return -ENOMEM;
309 }
310
311 /*
312  *      Clean up router proc interface.
313  */
314
315 void wanrouter_proc_cleanup(void)
316 {
317         remove_proc_entry("config", proc_router);
318         remove_proc_entry("status", proc_router);
319         remove_proc_entry(ROUTER_NAME, init_net.proc_net);
320 }
321
322 /*
323  *      Add directory entry for WAN device.
324  */
325
326 int wanrouter_proc_add(struct wan_device* wandev)
327 {
328         if (wandev->magic != ROUTER_MAGIC)
329                 return -EINVAL;
330
331         wandev->dent = proc_create(wandev->name, S_IRUGO,
332                                    proc_router, &wandev_fops);
333         if (!wandev->dent)
334                 return -ENOMEM;
335         wandev->dent->data      = wandev;
336         return 0;
337 }
338
339 /*
340  *      Delete directory entry for WAN device.
341  */
342 int wanrouter_proc_delete(struct wan_device* wandev)
343 {
344         if (wandev->magic != ROUTER_MAGIC)
345                 return -EINVAL;
346         remove_proc_entry(wandev->name, proc_router);
347         return 0;
348 }
349
350 #else
351
352 /*
353  *      No /proc - output stubs
354  */
355
356 int __init wanrouter_proc_init(void)
357 {
358         return 0;
359 }
360
361 void wanrouter_proc_cleanup(void)
362 {
363 }
364
365 int wanrouter_proc_add(struct wan_device *wandev)
366 {
367         return 0;
368 }
369
370 int wanrouter_proc_delete(struct wan_device *wandev)
371 {
372         return 0;
373 }
374
375 #endif
376
377 /*
378  *      End
379  */
380