[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / wanrouter / wanproc.c

/*****************************************************************************
* 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/smp_lock.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 folowing
 *	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 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)
{
	struct wan_device *wandev;
	loff_t l = *pos;

	lock_kernel();
	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)
{
	unlock_kernel();
}

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

static 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,
	.ioctl	 = wanrouter_ioctl,
};

/*
 *	Initialize router proc interface.
 */

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

	p = create_proc_entry("config", S_IRUGO, proc_router);
	if (!p)
		goto fail_config;
	p->proc_fops = &config_fops;
	p = create_proc_entry("status", S_IRUGO, proc_router);
	if (!p)
		goto fail_stat;
	p->proc_fops = &status_fops;
	return 0;
fail_stat:
	remove_proc_entry("config", proc_router);
fail_config:
	remove_proc_entry(ROUTER_NAME, 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, 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 = create_proc_entry(wandev->name, S_IRUGO, proc_router);
	if (!wandev->dent)
		return -ENOMEM;
	wandev->dent->proc_fops	= &wandev_fops;
	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
 */
Commit	Line	Data
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>
	30	#include <linux/smp_lock.h>
	31
	32	#include <asm/io.h>
	33
	34	#define PROC_STATS_FORMAT "%30s: %12lu\n"
	35
	36	/**** Defines and Macros ************************************************/
	37
	38	#define PROT_DECODE(prot) ((prot == WANCONFIG_FR) ? " FR" :\
	39	(prot == WANCONFIG_X25) ? " X25" : \
4ba6122b	40	(prot == WANCONFIG_PPP) ? " PPP" : \
1da177e4 LT	41	(prot == WANCONFIG_CHDLC) ? " CHDLC": \
1da177e4 LT	42	(prot == WANCONFIG_MPPP) ? " MPPP" : \
4ba6122b	43	" Unknown" )
1da177e4 LT	44
	45	/**** Function Prototypes ***********************************************/
	46
	47	#ifdef CONFIG_PROC_FS
	48
	49	/* Miscellaneous */
	50
	51	/*
	52	* Structures for interfacing with the /proc filesystem.
	53	* Router creates its own directory /proc/net/router with the folowing
	54	* entries:
	55	* config device configuration
	56	* status global device statistics
	57	* <device> entry for each WAN device
	58	*/
	59
	60	/*
	61	* Generic /proc/net/router/<file> file and inode operations
	62	*/
	63
	64	/*
	65	* /proc/net/router
	66	*/
	67
	68	static struct proc_dir_entry *proc_router;
	69
	70	/* Strings */
	71
	72	/*
	73	* Interface functions
	74	*/
	75
	76	/**** Proc filesystem entry points **************************************/
	77
	78	/*
	79	* Iterator
	80	*/
	81	static void r_start(struct seq_file m, loff_t *pos)
	82	{
	83	struct wan_device *wandev;
	84	loff_t l = *pos;
	85
	86	lock_kernel();
	87	if (!l--)
	88	return SEQ_START_TOKEN;
	89	for (wandev = wanrouter_router_devlist; l-- && wandev;
	90	wandev = wandev->next)
	91	;
	92	return wandev;
	93	}
	94
	95	static void r_next(struct seq_file m, void v, loff_t pos)
	96	{
	97	struct wan_device *wandev = v;
	98	(*pos)++;
	99	return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next;
	100	}
	101
	102	static void r_stop(struct seq_file m, void v)
	103	{
	104	unlock_kernel();
	105	}
	106
	107	static int config_show(struct seq_file m, void v)
108	{
109	struct wan_device *p = v;
110	if (v == SEQ_START_TOKEN) {
111	seq_puts(m, "Device name \| port \|IRQ\|DMA\| mem.addr \|"
112	"mem.size\|option1\|option2\|option3\|option4\n");
113	return 0;
114	}
115	if (!p->state)
116	return 0;
117	seq_printf(m, "%-15s\|0x%-4X\|%3u\|%3u\| 0x%-8lX \|0x%-6X\|%7u\|%7u\|%7u\|%7u\n",
118	p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize,
119	p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]);
120	return 0;
121	}
122
123	static int status_show(struct seq_file m, void v)
124	{
125	struct wan_device *p = v;
126	if (v == SEQ_START_TOKEN) {
127	seq_puts(m, "Device name \|protocol\|station\|interface\|"
128	"clocking\|baud rate\| MTU \|ndev\|link state\n");
129	return 0;
130	}
131	if (!p->state)
132	return 0;
133	seq_printf(m, "%-15s\|%-8s\| %-7s\| %-9s\|%-8s\|%9u\|%5u\|%3u \|",
134	p->name,
135	PROT_DECODE(p->config_id),
136	p->config_id == WANCONFIG_FR ?
137	(p->station ? "Node" : "CPE") :
138	(p->config_id == WANCONFIG_X25 ?
139	(p->station ? "DCE" : "DTE") :
140	("N/A")),
141	p->interface ? "V.35" : "RS-232",
142	p->clocking ? "internal" : "external",
143	p->bps,
144	p->mtu,
145	p->ndev);
146
147	switch (p->state) {
148	case WAN_UNCONFIGURED:
149	seq_printf(m, "%-12s\n", "unconfigured");
150	break;
151	case WAN_DISCONNECTED:
152	seq_printf(m, "%-12s\n", "disconnected");
153	break;
154	case WAN_CONNECTING:
155	seq_printf(m, "%-12s\n", "connecting");
156	break;
157	case WAN_CONNECTED:
158	seq_printf(m, "%-12s\n", "connected");
159	break;
160	default:
161	seq_printf(m, "%-12s\n", "invalid");
162	break;
163	}
164	return 0;
165	}
166
167	static struct seq_operations config_op = {
168	.start = r_start,
169	.next = r_next,
170	.stop = r_stop,
171	.show = config_show,
172	};
173
174	static struct seq_operations status_op = {
175	.start = r_start,
176	.next = r_next,
177	.stop = r_stop,
178	.show = status_show,
179	};
180
181	static int config_open(struct inode inode, struct file file)
182	{
183	return seq_open(file, &config_op);
184	}
185
186	static int status_open(struct inode inode, struct file file)
187	{
188	return seq_open(file, &status_op);
189	}
190
da7071d7	191	static const struct file_operations config_fops = {
1da177e4 LT	192	.owner = THIS_MODULE,
	193	.open = config_open,
	194	.read = seq_read,
	195	.llseek = seq_lseek,
	196	.release = seq_release,
	197	};
	198
da7071d7	199	static const struct file_operations status_fops = {
1da177e4 LT	200	.owner = THIS_MODULE,
	201	.open = status_open,
	202	.read = seq_read,
	203	.llseek = seq_lseek,
	204	.release = seq_release,
	205	};
	206
	207	static int wandev_show(struct seq_file m, void v)
	208	{
	209	struct wan_device *wandev = m->private;
	210
	211	if (wandev->magic != ROUTER_MAGIC)
	212	return 0;
	213
	214	if (!wandev->state) {
	215	seq_puts(m, "device is not configured!\n");
	216	return 0;
	217	}
	218
	219	/* Update device statistics */
	220	if (wandev->update) {
	221	int err = wandev->update(wandev);
	222	if (err == -EAGAIN) {
	223	seq_puts(m, "Device is busy!\n");
	224	return 0;
	225	}
	226	if (err) {
	227	seq_puts(m, "Device is not configured!\n");
	228	return 0;
	229	}
	230	}
	231
	232	seq_printf(m, PROC_STATS_FORMAT,
	233	"total packets received", wandev->stats.rx_packets);
	234	seq_printf(m, PROC_STATS_FORMAT,
	235	"total packets transmitted", wandev->stats.tx_packets);
	236	seq_printf(m, PROC_STATS_FORMAT,
	237	"total bytes received", wandev->stats.rx_bytes);
	238	seq_printf(m, PROC_STATS_FORMAT,
	239	"total bytes transmitted", wandev->stats.tx_bytes);
	240	seq_printf(m, PROC_STATS_FORMAT,
	241	"bad packets received", wandev->stats.rx_errors);
	242	seq_printf(m, PROC_STATS_FORMAT,
	243	"packet transmit problems", wandev->stats.tx_errors);
	244	seq_printf(m, PROC_STATS_FORMAT,
	245	"received frames dropped", wandev->stats.rx_dropped);
	246	seq_printf(m, PROC_STATS_FORMAT,
	247	"transmit frames dropped", wandev->stats.tx_dropped);
	248	seq_printf(m, PROC_STATS_FORMAT,
	249	"multicast packets received", wandev->stats.multicast);
	250	seq_printf(m, PROC_STATS_FORMAT,
	251	"transmit collisions", wandev->stats.collisions);
	252	seq_printf(m, PROC_STATS_FORMAT,
	253	"receive length errors", wandev->stats.rx_length_errors);
	254	seq_printf(m, PROC_STATS_FORMAT,
	255	"receiver overrun errors", wandev->stats.rx_over_errors);
	256	seq_printf(m, PROC_STATS_FORMAT,
	257	"CRC errors", wandev->stats.rx_crc_errors);
	258	seq_printf(m, PROC_STATS_FORMAT,
	259	"frame format errors (aborts)", wandev->stats.rx_frame_errors);
	260	seq_printf(m, PROC_STATS_FORMAT,
	261	"receiver fifo overrun", wandev->stats.rx_fifo_errors);
	262	seq_printf(m, PROC_STATS_FORMAT,
	263	"receiver missed packet", wandev->stats.rx_missed_errors);
264	seq_printf(m, PROC_STATS_FORMAT,
265	"aborted frames transmitted", wandev->stats.tx_aborted_errors);
266	return 0;
267	}
268
269	static int wandev_open(struct inode inode, struct file file)
270	{
271	return single_open(file, wandev_show, PDE(inode)->data);
272	}
273
da7071d7	274	static const struct file_operations wandev_fops = {
1da177e4 LT	275	.owner = THIS_MODULE,
	276	.open = wandev_open,
	277	.read = seq_read,
	278	.llseek = seq_lseek,
	279	.release = single_release,
	280	.ioctl = wanrouter_ioctl,
	281	};
	282
	283	/*
	284	* Initialize router proc interface.
	285	*/
	286
	287	int __init wanrouter_proc_init(void)
	288	{
	289	struct proc_dir_entry *p;
	290	proc_router = proc_mkdir(ROUTER_NAME, proc_net);
	291	if (!proc_router)
	292	goto fail;
	293
	294	p = create_proc_entry("config", S_IRUGO, proc_router);
	295	if (!p)
	296	goto fail_config;
	297	p->proc_fops = &config_fops;
	298	p = create_proc_entry("status", S_IRUGO, proc_router);
	299	if (!p)
	300	goto fail_stat;
	301	p->proc_fops = &status_fops;
	302	return 0;
	303	fail_stat:
	304	remove_proc_entry("config", proc_router);
	305	fail_config:
	306	remove_proc_entry(ROUTER_NAME, 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, 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 = create_proc_entry(wandev->name, S_IRUGO, proc_router);
	332	if (!wandev->dent)
	333	return -ENOMEM;
	334	wandev->dent->proc_fops = &wandev_fops;
	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