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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
15fd0cd9 | 30 | #include <linux/mutex.h> |
1da177e4 | 31 | |
457c4cbc | 32 | #include <net/net_namespace.h> |
1da177e4 LT |
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" : \ | |
4ba6122b | 41 | (prot == WANCONFIG_PPP) ? " PPP" : \ |
1da177e4 LT |
42 | (prot == WANCONFIG_CHDLC) ? " CHDLC": \ |
43 | (prot == WANCONFIG_MPPP) ? " MPPP" : \ | |
4ba6122b | 44 | " Unknown" ) |
1da177e4 LT |
45 | |
46 | /****** Function Prototypes *************************************************/ | |
47 | ||
48 | #ifdef CONFIG_PROC_FS | |
49 | ||
50 | /* Miscellaneous */ | |
51 | ||
52 | /* | |
53 | * Structures for interfacing with the /proc filesystem. | |
25985edc | 54 | * Router creates its own directory /proc/net/router with the following |
1da177e4 LT |
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 | ||
15fd0cd9 | 69 | static DEFINE_MUTEX(config_mutex); |
1da177e4 LT |
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) | |
9ee62630 | 84 | __acquires(kernel_lock) |
1da177e4 LT |
85 | { |
86 | struct wan_device *wandev; | |
87 | loff_t l = *pos; | |
88 | ||
15fd0cd9 | 89 | mutex_lock(&config_mutex); |
1da177e4 LT |
90 | if (!l--) |
91 | return SEQ_START_TOKEN; | |
92 | for (wandev = wanrouter_router_devlist; l-- && wandev; | |
93 | wandev = wandev->next) | |
94 | ; | |
95 | return wandev; | |
96 | } | |
97 | ||
98 | static void *r_next(struct seq_file *m, void *v, loff_t *pos) | |
99 | { | |
100 | struct wan_device *wandev = v; | |
101 | (*pos)++; | |
102 | return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next; | |
103 | } | |
104 | ||
105 | static void r_stop(struct seq_file *m, void *v) | |
9ee62630 | 106 | __releases(kernel_lock) |
1da177e4 | 107 | { |
15fd0cd9 | 108 | mutex_unlock(&config_mutex); |
1da177e4 LT |
109 | } |
110 | ||
111 | static int config_show(struct seq_file *m, void *v) | |
112 | { | |
113 | struct wan_device *p = v; | |
114 | if (v == SEQ_START_TOKEN) { | |
115 | seq_puts(m, "Device name | port |IRQ|DMA| mem.addr |" | |
116 | "mem.size|option1|option2|option3|option4\n"); | |
117 | return 0; | |
118 | } | |
119 | if (!p->state) | |
120 | return 0; | |
121 | seq_printf(m, "%-15s|0x%-4X|%3u|%3u| 0x%-8lX |0x%-6X|%7u|%7u|%7u|%7u\n", | |
122 | p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize, | |
123 | p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int status_show(struct seq_file *m, void *v) | |
128 | { | |
129 | struct wan_device *p = v; | |
130 | if (v == SEQ_START_TOKEN) { | |
131 | seq_puts(m, "Device name |protocol|station|interface|" | |
132 | "clocking|baud rate| MTU |ndev|link state\n"); | |
133 | return 0; | |
134 | } | |
135 | if (!p->state) | |
136 | return 0; | |
137 | seq_printf(m, "%-15s|%-8s| %-7s| %-9s|%-8s|%9u|%5u|%3u |", | |
138 | p->name, | |
139 | PROT_DECODE(p->config_id), | |
140 | p->config_id == WANCONFIG_FR ? | |
141 | (p->station ? "Node" : "CPE") : | |
142 | (p->config_id == WANCONFIG_X25 ? | |
143 | (p->station ? "DCE" : "DTE") : | |
144 | ("N/A")), | |
145 | p->interface ? "V.35" : "RS-232", | |
146 | p->clocking ? "internal" : "external", | |
147 | p->bps, | |
148 | p->mtu, | |
149 | p->ndev); | |
150 | ||
151 | switch (p->state) { | |
152 | case WAN_UNCONFIGURED: | |
153 | seq_printf(m, "%-12s\n", "unconfigured"); | |
154 | break; | |
155 | case WAN_DISCONNECTED: | |
156 | seq_printf(m, "%-12s\n", "disconnected"); | |
157 | break; | |
158 | case WAN_CONNECTING: | |
159 | seq_printf(m, "%-12s\n", "connecting"); | |
160 | break; | |
161 | case WAN_CONNECTED: | |
162 | seq_printf(m, "%-12s\n", "connected"); | |
163 | break; | |
164 | default: | |
165 | seq_printf(m, "%-12s\n", "invalid"); | |
166 | break; | |
167 | } | |
168 | return 0; | |
169 | } | |
170 | ||
56b3d975 | 171 | static const struct seq_operations config_op = { |
1da177e4 LT |
172 | .start = r_start, |
173 | .next = r_next, | |
174 | .stop = r_stop, | |
175 | .show = config_show, | |
176 | }; | |
177 | ||
56b3d975 | 178 | static const struct seq_operations status_op = { |
1da177e4 LT |
179 | .start = r_start, |
180 | .next = r_next, | |
181 | .stop = r_stop, | |
182 | .show = status_show, | |
183 | }; | |
184 | ||
185 | static int config_open(struct inode *inode, struct file *file) | |
186 | { | |
187 | return seq_open(file, &config_op); | |
188 | } | |
189 | ||
190 | static int status_open(struct inode *inode, struct file *file) | |
191 | { | |
192 | return seq_open(file, &status_op); | |
193 | } | |
194 | ||
da7071d7 | 195 | static const struct file_operations config_fops = { |
1da177e4 LT |
196 | .owner = THIS_MODULE, |
197 | .open = config_open, | |
198 | .read = seq_read, | |
199 | .llseek = seq_lseek, | |
200 | .release = seq_release, | |
201 | }; | |
202 | ||
da7071d7 | 203 | static const struct file_operations status_fops = { |
1da177e4 LT |
204 | .owner = THIS_MODULE, |
205 | .open = status_open, | |
206 | .read = seq_read, | |
207 | .llseek = seq_lseek, | |
208 | .release = seq_release, | |
209 | }; | |
210 | ||
211 | static int wandev_show(struct seq_file *m, void *v) | |
212 | { | |
213 | struct wan_device *wandev = m->private; | |
214 | ||
215 | if (wandev->magic != ROUTER_MAGIC) | |
216 | return 0; | |
217 | ||
218 | if (!wandev->state) { | |
219 | seq_puts(m, "device is not configured!\n"); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /* Update device statistics */ | |
224 | if (wandev->update) { | |
225 | int err = wandev->update(wandev); | |
226 | if (err == -EAGAIN) { | |
227 | seq_puts(m, "Device is busy!\n"); | |
228 | return 0; | |
229 | } | |
230 | if (err) { | |
231 | seq_puts(m, "Device is not configured!\n"); | |
232 | return 0; | |
233 | } | |
234 | } | |
235 | ||
236 | seq_printf(m, PROC_STATS_FORMAT, | |
237 | "total packets received", wandev->stats.rx_packets); | |
238 | seq_printf(m, PROC_STATS_FORMAT, | |
239 | "total packets transmitted", wandev->stats.tx_packets); | |
240 | seq_printf(m, PROC_STATS_FORMAT, | |
241 | "total bytes received", wandev->stats.rx_bytes); | |
242 | seq_printf(m, PROC_STATS_FORMAT, | |
243 | "total bytes transmitted", wandev->stats.tx_bytes); | |
244 | seq_printf(m, PROC_STATS_FORMAT, | |
245 | "bad packets received", wandev->stats.rx_errors); | |
246 | seq_printf(m, PROC_STATS_FORMAT, | |
247 | "packet transmit problems", wandev->stats.tx_errors); | |
248 | seq_printf(m, PROC_STATS_FORMAT, | |
249 | "received frames dropped", wandev->stats.rx_dropped); | |
250 | seq_printf(m, PROC_STATS_FORMAT, | |
251 | "transmit frames dropped", wandev->stats.tx_dropped); | |
252 | seq_printf(m, PROC_STATS_FORMAT, | |
253 | "multicast packets received", wandev->stats.multicast); | |
254 | seq_printf(m, PROC_STATS_FORMAT, | |
255 | "transmit collisions", wandev->stats.collisions); | |
256 | seq_printf(m, PROC_STATS_FORMAT, | |
257 | "receive length errors", wandev->stats.rx_length_errors); | |
258 | seq_printf(m, PROC_STATS_FORMAT, | |
259 | "receiver overrun errors", wandev->stats.rx_over_errors); | |
260 | seq_printf(m, PROC_STATS_FORMAT, | |
261 | "CRC errors", wandev->stats.rx_crc_errors); | |
262 | seq_printf(m, PROC_STATS_FORMAT, | |
263 | "frame format errors (aborts)", wandev->stats.rx_frame_errors); | |
264 | seq_printf(m, PROC_STATS_FORMAT, | |
265 | "receiver fifo overrun", wandev->stats.rx_fifo_errors); | |
266 | seq_printf(m, PROC_STATS_FORMAT, | |
267 | "receiver missed packet", wandev->stats.rx_missed_errors); | |
268 | seq_printf(m, PROC_STATS_FORMAT, | |
269 | "aborted frames transmitted", wandev->stats.tx_aborted_errors); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static int wandev_open(struct inode *inode, struct file *file) | |
274 | { | |
275 | return single_open(file, wandev_show, PDE(inode)->data); | |
276 | } | |
277 | ||
da7071d7 | 278 | static const struct file_operations wandev_fops = { |
1da177e4 LT |
279 | .owner = THIS_MODULE, |
280 | .open = wandev_open, | |
281 | .read = seq_read, | |
282 | .llseek = seq_lseek, | |
283 | .release = single_release, | |
866988ed | 284 | .unlocked_ioctl = wanrouter_ioctl, |
1da177e4 LT |
285 | }; |
286 | ||
287 | /* | |
288 | * Initialize router proc interface. | |
289 | */ | |
290 | ||
291 | int __init wanrouter_proc_init(void) | |
292 | { | |
293 | struct proc_dir_entry *p; | |
457c4cbc | 294 | proc_router = proc_mkdir(ROUTER_NAME, init_net.proc_net); |
1da177e4 LT |
295 | if (!proc_router) |
296 | goto fail; | |
297 | ||
6d37a158 | 298 | p = proc_create("config", S_IRUGO, proc_router, &config_fops); |
1da177e4 LT |
299 | if (!p) |
300 | goto fail_config; | |
6d37a158 | 301 | p = proc_create("status", S_IRUGO, proc_router, &status_fops); |
1da177e4 LT |
302 | if (!p) |
303 | goto fail_stat; | |
1da177e4 LT |
304 | return 0; |
305 | fail_stat: | |
306 | remove_proc_entry("config", proc_router); | |
307 | fail_config: | |
457c4cbc | 308 | remove_proc_entry(ROUTER_NAME, init_net.proc_net); |
1da177e4 LT |
309 | fail: |
310 | return -ENOMEM; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Clean up router proc interface. | |
315 | */ | |
316 | ||
317 | void wanrouter_proc_cleanup(void) | |
318 | { | |
319 | remove_proc_entry("config", proc_router); | |
320 | remove_proc_entry("status", proc_router); | |
457c4cbc | 321 | remove_proc_entry(ROUTER_NAME, init_net.proc_net); |
1da177e4 LT |
322 | } |
323 | ||
324 | /* | |
325 | * Add directory entry for WAN device. | |
326 | */ | |
327 | ||
328 | int wanrouter_proc_add(struct wan_device* wandev) | |
329 | { | |
330 | if (wandev->magic != ROUTER_MAGIC) | |
331 | return -EINVAL; | |
332 | ||
6d37a158 WC |
333 | wandev->dent = proc_create(wandev->name, S_IRUGO, |
334 | proc_router, &wandev_fops); | |
1da177e4 LT |
335 | if (!wandev->dent) |
336 | return -ENOMEM; | |
1da177e4 LT |
337 | wandev->dent->data = wandev; |
338 | return 0; | |
339 | } | |
340 | ||
341 | /* | |
342 | * Delete directory entry for WAN device. | |
343 | */ | |
344 | int wanrouter_proc_delete(struct wan_device* wandev) | |
345 | { | |
346 | if (wandev->magic != ROUTER_MAGIC) | |
347 | return -EINVAL; | |
348 | remove_proc_entry(wandev->name, proc_router); | |
349 | return 0; | |
350 | } | |
351 | ||
352 | #else | |
353 | ||
354 | /* | |
355 | * No /proc - output stubs | |
356 | */ | |
357 | ||
358 | int __init wanrouter_proc_init(void) | |
359 | { | |
360 | return 0; | |
361 | } | |
362 | ||
363 | void wanrouter_proc_cleanup(void) | |
364 | { | |
365 | } | |
366 | ||
367 | int wanrouter_proc_add(struct wan_device *wandev) | |
368 | { | |
369 | return 0; | |
370 | } | |
371 | ||
372 | int wanrouter_proc_delete(struct wan_device *wandev) | |
373 | { | |
374 | return 0; | |
375 | } | |
376 | ||
377 | #endif | |
378 | ||
379 | /* | |
380 | * End | |
381 | */ | |
382 |