[deliverable/linux.git] / drivers / isdn / hysdn / hysdn_procconf.c

/* $Id: hysdn_procconf.c,v 1.8.6.4 2001/09/23 22:24:54 kai Exp $
 *
 * Linux driver for HYSDN cards, /proc/net filesystem dir and conf functions.
 *
 * written by Werner Cornelius (werner@titro.de) for Hypercope GmbH
 *
 * Copyright 1999  by Werner Cornelius (werner@titro.de)
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/cred.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <net/net_namespace.h>

#include "hysdn_defs.h"

static DEFINE_MUTEX(hysdn_conf_mutex);
static char *hysdn_procconf_revision = "$Revision: 1.8.6.4 $";

#define INFO_OUT_LEN 80		/* length of info line including lf */

/********************************************************/
/* defines and data structure for conf write operations */
/********************************************************/
#define CONF_STATE_DETECT 0	/* waiting for detect */
#define CONF_STATE_CONF   1	/* writing config data */
#define CONF_STATE_POF    2	/* writing pof data */
#define CONF_LINE_LEN   255	/* 255 chars max */

struct conf_writedata {
	hysdn_card *card;	/* card the device is connected to */
	int buf_size;		/* actual number of bytes in the buffer */
	int needed_size;	/* needed size when reading pof */
	int state;		/* actual interface states from above constants */
	unsigned char conf_line[CONF_LINE_LEN];	/* buffered conf line */
	unsigned short channel;		/* active channel number */
	unsigned char *pof_buffer;	/* buffer when writing pof */
};

/***********************************************************************/
/* process_line parses one config line and transfers it to the card if */
/* necessary.                                                          */
/* if the return value is negative an error occurred.                   */
/***********************************************************************/
static int
process_line(struct conf_writedata *cnf)
{
	unsigned char *cp = cnf->conf_line;
	int i;

	if (cnf->card->debug_flags & LOG_CNF_LINE)
		hysdn_addlog(cnf->card, "conf line: %s", cp);

	if (*cp == '-') {	/* option */
		cp++;		/* point to option char */

		if (*cp++ != 'c')
			return (0);	/* option unknown or used */
		i = 0;		/* start value for channel */
		while ((*cp <= '9') && (*cp >= '0'))
			i = i * 10 + *cp++ - '0';	/* get decimal number */
		if (i > 65535) {
			if (cnf->card->debug_flags & LOG_CNF_MISC)
				hysdn_addlog(cnf->card, "conf channel invalid  %d", i);
			return (-ERR_INV_CHAN);		/* invalid channel */
		}
		cnf->channel = i & 0xFFFF;	/* set new channel number */
		return (0);	/* success */
	}			/* option */
	if (*cp == '*') {	/* line to send */
		if (cnf->card->debug_flags & LOG_CNF_DATA)
			hysdn_addlog(cnf->card, "conf chan=%d %s", cnf->channel, cp);
		return (hysdn_tx_cfgline(cnf->card, cnf->conf_line + 1,
					 cnf->channel));	/* send the line without * */
	}			/* line to send */
	return (0);
}				/* process_line */

/***********************************/
/* conf file operations and tables */
/***********************************/

/****************************************************/
/* write conf file -> boot or send cfg line to card */
/****************************************************/
static ssize_t
hysdn_conf_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
{
	struct conf_writedata *cnf;
	int i;
	unsigned char ch, *cp;

	if (!count)
		return (0);	/* nothing to handle */

	if (!(cnf = file->private_data))
		return (-EFAULT);	/* should never happen */

	if (cnf->state == CONF_STATE_DETECT) {	/* auto detect cnf or pof data */
		if (copy_from_user(&ch, buf, 1))	/* get first char for detect */
			return (-EFAULT);

		if (ch == 0x1A) {
			/* we detected a pof file */
			if ((cnf->needed_size = pof_write_open(cnf->card, &cnf->pof_buffer)) <= 0)
				return (cnf->needed_size);	/* an error occurred -> exit */
			cnf->buf_size = 0;	/* buffer is empty */
			cnf->state = CONF_STATE_POF;	/* new state */
		} else {
			/* conf data has been detected */
			cnf->buf_size = 0;	/* buffer is empty */
			cnf->state = CONF_STATE_CONF;	/* requested conf data write */
			if (cnf->card->state != CARD_STATE_RUN)
				return (-ERR_NOT_BOOTED);
			cnf->conf_line[CONF_LINE_LEN - 1] = 0;	/* limit string length */
			cnf->channel = 4098;	/* default channel for output */
		}
	}			/* state was auto detect */
	if (cnf->state == CONF_STATE_POF) {	/* pof write active */
		i = cnf->needed_size - cnf->buf_size;	/* bytes still missing for write */
		if (i <= 0)
			return (-EINVAL);	/* size error handling pof */

		if (i < count)
			count = i;	/* limit requested number of bytes */
		if (copy_from_user(cnf->pof_buffer + cnf->buf_size, buf, count))
			return (-EFAULT);	/* error while copying */
		cnf->buf_size += count;

		if (cnf->needed_size == cnf->buf_size) {
			cnf->needed_size = pof_write_buffer(cnf->card, cnf->buf_size);	/* write data */
			if (cnf->needed_size <= 0) {
				cnf->card->state = CARD_STATE_BOOTERR;	/* show boot error */
				return (cnf->needed_size);	/* an error occurred */
			}
			cnf->buf_size = 0;	/* buffer is empty again */
		}
	}
	/* pof write active */
	else {			/* conf write active */

		if (cnf->card->state != CARD_STATE_RUN) {
			if (cnf->card->debug_flags & LOG_CNF_MISC)
				hysdn_addlog(cnf->card, "cnf write denied -> not booted");
			return (-ERR_NOT_BOOTED);
		}
		i = (CONF_LINE_LEN - 1) - cnf->buf_size;	/* bytes available in buffer */
		if (i > 0) {
			/* copy remaining bytes into buffer */

			if (count > i)
				count = i;	/* limit transfer */
			if (copy_from_user(cnf->conf_line + cnf->buf_size, buf, count))
				return (-EFAULT);	/* error while copying */

			i = count;	/* number of chars in buffer */
			cp = cnf->conf_line + cnf->buf_size;
			while (i) {
				/* search for end of line */
				if ((*cp < ' ') && (*cp != 9))
					break;	/* end of line found */
				cp++;
				i--;
			}	/* search for end of line */

			if (i) {
				/* delimiter found */
				*cp++ = 0;	/* string termination */
				count -= (i - 1);	/* subtract remaining bytes from count */
				while ((i) && (*cp < ' ') && (*cp != 9)) {
					i--;	/* discard next char */
					count++;	/* mark as read */
					cp++;	/* next char */
				}
				cnf->buf_size = 0;	/* buffer is empty after transfer */
				if ((i = process_line(cnf)) < 0)	/* handle the line */
					count = i;	/* return the error */
			}
			/* delimiter found */
			else {
				cnf->buf_size += count;		/* add chars to string */
				if (cnf->buf_size >= CONF_LINE_LEN - 1) {
					if (cnf->card->debug_flags & LOG_CNF_MISC)
						hysdn_addlog(cnf->card, "cnf line too long %d chars pos %d", cnf->buf_size, count);
					return (-ERR_CONF_LONG);
				}
			}	/* not delimited */

		}
		/* copy remaining bytes into buffer */
		else {
			if (cnf->card->debug_flags & LOG_CNF_MISC)
				hysdn_addlog(cnf->card, "cnf line too long");
			return (-ERR_CONF_LONG);
		}
	}			/* conf write active */

	return (count);
}				/* hysdn_conf_write */

/*******************************************/
/* read conf file -> output card info data */
/*******************************************/
static ssize_t
hysdn_conf_read(struct file *file, char __user *buf, size_t count, loff_t *off)
{
	char *cp;

	if (!(file->f_mode & FMODE_READ))
		return -EPERM;	/* no permission to read */

	if (!(cp = file->private_data))
		return -EFAULT;	/* should never happen */

	return simple_read_from_buffer(buf, count, off, cp, strlen(cp));
}				/* hysdn_conf_read */

/******************/
/* open conf file */
/******************/
static int
hysdn_conf_open(struct inode *ino, struct file *filep)
{
	hysdn_card *card;
	struct proc_dir_entry *pd;
	struct conf_writedata *cnf;
	char *cp, *tmp;

	/* now search the addressed card */
	mutex_lock(&hysdn_conf_mutex);
	card = card_root;
	while (card) {
		pd = card->procconf;
		if (pd == PDE(ino))
			break;
		card = card->next;	/* search next entry */
	}
	if (!card) {
		mutex_unlock(&hysdn_conf_mutex);
		return (-ENODEV);	/* device is unknown/invalid */
	}
	if (card->debug_flags & (LOG_PROC_OPEN | LOG_PROC_ALL))
		hysdn_addlog(card, "config open for uid=%d gid=%d mode=0x%x",
			     filep->f_cred->fsuid, filep->f_cred->fsgid,
			     filep->f_mode);

	if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
		/* write only access -> write boot file or conf line */

		if (!(cnf = kmalloc(sizeof(struct conf_writedata), GFP_KERNEL))) {
			mutex_unlock(&hysdn_conf_mutex);
			return (-EFAULT);
		}
		cnf->card = card;
		cnf->buf_size = 0;	/* nothing buffered */
		cnf->state = CONF_STATE_DETECT;		/* start auto detect */
		filep->private_data = cnf;

	} else if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
		/* read access -> output card info data */

		if (!(tmp = kmalloc(INFO_OUT_LEN * 2 + 2, GFP_KERNEL))) {
			mutex_unlock(&hysdn_conf_mutex);
			return (-EFAULT);	/* out of memory */
		}
		filep->private_data = tmp;	/* start of string */

		/* first output a headline */
		sprintf(tmp, "id bus slot type irq iobase dp-mem     b-chans fax-chans state device");
		cp = tmp;	/* start of string */
		while (*cp)
			cp++;
		while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
			*cp++ = ' ';
		*cp++ = '\n';

		/* and now the data */
		sprintf(cp, "%d  %3d %4d %4d %3d 0x%04x 0x%08lx %7d %9d %3d   %s",
			card->myid,
			card->bus,
			PCI_SLOT(card->devfn),
			card->brdtype,
			card->irq,
			card->iobase,
			card->membase,
			card->bchans,
			card->faxchans,
			card->state,
			hysdn_net_getname(card));
		while (*cp)
			cp++;
		while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
			*cp++ = ' ';
		*cp++ = '\n';
		*cp = 0;	/* end of string */
	} else {		/* simultaneous read/write access forbidden ! */
		mutex_unlock(&hysdn_conf_mutex);
		return (-EPERM);	/* no permission this time */
	}
	mutex_unlock(&hysdn_conf_mutex);
	return nonseekable_open(ino, filep);
}				/* hysdn_conf_open */

/***************************/
/* close a config file.    */
/***************************/
static int
hysdn_conf_close(struct inode *ino, struct file *filep)
{
	hysdn_card *card;
	struct conf_writedata *cnf;
	int retval = 0;
	struct proc_dir_entry *pd;

	mutex_lock(&hysdn_conf_mutex);
	/* search the addressed card */
	card = card_root;
	while (card) {
		pd = card->procconf;
		if (pd == PDE(ino))
			break;
		card = card->next;	/* search next entry */
	}
	if (!card) {
		mutex_unlock(&hysdn_conf_mutex);
		return (-ENODEV);	/* device is unknown/invalid */
	}
	if (card->debug_flags & (LOG_PROC_OPEN | LOG_PROC_ALL))
		hysdn_addlog(card, "config close for uid=%d gid=%d mode=0x%x",
			     filep->f_cred->fsuid, filep->f_cred->fsgid,
			     filep->f_mode);

	if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
		/* write only access -> write boot file or conf line */
		if (filep->private_data) {
			cnf = filep->private_data;

			if (cnf->state == CONF_STATE_POF)
				retval = pof_write_close(cnf->card);	/* close the pof write */
			kfree(filep->private_data);	/* free allocated memory for buffer */

		}		/* handle write private data */
	} else if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
		/* read access -> output card info data */

		kfree(filep->private_data);	/* release memory */
	}
	mutex_unlock(&hysdn_conf_mutex);
	return (retval);
}				/* hysdn_conf_close */

/******************************************************/
/* table for conf filesystem functions defined above. */
/******************************************************/
static const struct file_operations conf_fops =
{
	.owner		= THIS_MODULE,
	.llseek         = no_llseek,
	.read           = hysdn_conf_read,
	.write          = hysdn_conf_write,
	.open           = hysdn_conf_open,
	.release        = hysdn_conf_close,                                       
};

/*****************************/
/* hysdn subdir in /proc/net */
/*****************************/
struct proc_dir_entry *hysdn_proc_entry = NULL;

/*******************************************************************************/
/* hysdn_procconf_init is called when the module is loaded and after the cards */
/* have been detected. The needed proc dir and card config files are created.  */
/* The log init is called at last.                                             */
/*******************************************************************************/
int
hysdn_procconf_init(void)
{
	hysdn_card *card;
	unsigned char conf_name[20];

	hysdn_proc_entry = proc_mkdir(PROC_SUBDIR_NAME, init_net.proc_net);
	if (!hysdn_proc_entry) {
		printk(KERN_ERR "HYSDN: unable to create hysdn subdir\n");
		return (-1);
	}
	card = card_root;	/* point to first card */
	while (card) {

		sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
		if ((card->procconf = (void *) proc_create(conf_name,
						S_IFREG | S_IRUGO | S_IWUSR,
						hysdn_proc_entry,
						&conf_fops)) != NULL) {
			hysdn_proclog_init(card);	/* init the log file entry */
		}
		card = card->next;	/* next entry */
	}

	printk(KERN_NOTICE "HYSDN: procfs Rev. %s initialised\n", hysdn_getrev(hysdn_procconf_revision));
	return (0);
}				/* hysdn_procconf_init */

/*************************************************************************************/
/* hysdn_procconf_release is called when the module is unloaded and before the cards */
/* resources are released. The module counter is assumed to be 0 !                   */
/*************************************************************************************/
void
hysdn_procconf_release(void)
{
	hysdn_card *card;
	unsigned char conf_name[20];

	card = card_root;	/* start with first card */
	while (card) {

		sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
		if (card->procconf)
			remove_proc_entry(conf_name, hysdn_proc_entry);

		hysdn_proclog_release(card);	/* init the log file entry */

		card = card->next;	/* point to next card */
	}

	remove_proc_entry(PROC_SUBDIR_NAME, init_net.proc_net);
}
Commit	Line	Data
1da177e4 LT	1	/* $Id: hysdn_procconf.c,v 1.8.6.4 2001/09/23 22:24:54 kai Exp $
	2	*
	3	* Linux driver for HYSDN cards, /proc/net filesystem dir and conf functions.
	4	*
	5	* written by Werner Cornelius (werner@titro.de) for Hypercope GmbH
	6	*
	7	* Copyright 1999 by Werner Cornelius (werner@titro.de)
	8	*
	9	* This software may be used and distributed according to the terms
	10	* of the GNU General Public License, incorporated herein by reference.
	11	*
	12	*/
	13
d43c36dc	14	#include <linux/cred.h>
1da177e4	15	#include <linux/module.h>
1da177e4 LT	16	#include <linux/poll.h>
	17	#include <linux/proc_fs.h>
	18	#include <linux/pci.h>
5a0e3ad6	19	#include <linux/slab.h>
76a64921	20	#include <linux/mutex.h>
457c4cbc	21	#include <net/net_namespace.h>
1da177e4 LT	22
	23	#include "hysdn_defs.h"
	24
76a64921	25	static DEFINE_MUTEX(hysdn_conf_mutex);
1da177e4 LT	26	static char *hysdn_procconf_revision = "$Revision: 1.8.6.4 $";
	27
	28	#define INFO_OUT_LEN 80 /* length of info line including lf */
	29
	30	/********************************************************/
	31	/* defines and data structure for conf write operations */
	32	/********************************************************/
	33	#define CONF_STATE_DETECT 0 /* waiting for detect */
	34	#define CONF_STATE_CONF 1 /* writing config data */
	35	#define CONF_STATE_POF 2 /* writing pof data */
	36	#define CONF_LINE_LEN 255 /* 255 chars max */
	37
	38	struct conf_writedata {
	39	hysdn_card card; / card the device is connected to */
	40	int buf_size; /* actual number of bytes in the buffer */
	41	int needed_size; /* needed size when reading pof */
	42	int state; /* actual interface states from above constants */
c721bcce AM	43	unsigned char conf_line[CONF_LINE_LEN]; /* buffered conf line */
	44	unsigned short channel; /* active channel number */
	45	unsigned char pof_buffer; / buffer when writing pof */
1da177e4 LT	46	};
	47
	48	/***********************************************************************/
	49	/* process_line parses one config line and transfers it to the card if */
	50	/* necessary. */
	51	/* if the return value is negative an error occurred. */
	52	/***********************************************************************/
	53	static int
	54	process_line(struct conf_writedata *cnf)
	55	{
c721bcce	56	unsigned char *cp = cnf->conf_line;
1da177e4 LT	57	int i;
	58
	59	if (cnf->card->debug_flags & LOG_CNF_LINE)
	60	hysdn_addlog(cnf->card, "conf line: %s", cp);
	61
	62	if (cp == '-') { / option */
	63	cp++; /* point to option char */
	64
	65	if (*cp++ != 'c')
	66	return (0); /* option unknown or used */
	67	i = 0; /* start value for channel */
	68	while ((cp <= '9') && (cp >= '0'))
	69	i = i * 10 + cp++ - '0'; / get decimal number */
	70	if (i > 65535) {
	71	if (cnf->card->debug_flags & LOG_CNF_MISC)
	72	hysdn_addlog(cnf->card, "conf channel invalid %d", i);
	73	return (-ERR_INV_CHAN); /* invalid channel */
	74	}
	75	cnf->channel = i & 0xFFFF; /* set new channel number */
	76	return (0); /* success */
	77	} /* option */
	78	if (cp == '') { /* line to send */
	79	if (cnf->card->debug_flags & LOG_CNF_DATA)
	80	hysdn_addlog(cnf->card, "conf chan=%d %s", cnf->channel, cp);
	81	return (hysdn_tx_cfgline(cnf->card, cnf->conf_line + 1,
	82	cnf->channel)); /* send the line without * */
	83	} /* line to send */
	84	return (0);
	85	} /* process_line */
	86
	87	/***********************************/
	88	/* conf file operations and tables */
	89	/***********************************/
	90
	91	/****************************************************/
	92	/* write conf file -> boot or send cfg line to card */
	93	/****************************************************/
	94	static ssize_t
	95	hysdn_conf_write(struct file file, const char __user buf, size_t count, loff_t * off)
	96	{
	97	struct conf_writedata *cnf;
	98	int i;
c721bcce	99	unsigned char ch, *cp;
1da177e4 LT	100
	101	if (!count)
	102	return (0); /* nothing to handle */
	103
	104	if (!(cnf = file->private_data))
	105	return (-EFAULT); /* should never happen */
	106
	107	if (cnf->state == CONF_STATE_DETECT) { /* auto detect cnf or pof data */
	108	if (copy_from_user(&ch, buf, 1)) /* get first char for detect */
	109	return (-EFAULT);
	110
	111	if (ch == 0x1A) {
	112	/* we detected a pof file */
	113	if ((cnf->needed_size = pof_write_open(cnf->card, &cnf->pof_buffer)) <= 0)
	114	return (cnf->needed_size); /* an error occurred -> exit */
	115	cnf->buf_size = 0; /* buffer is empty */
	116	cnf->state = CONF_STATE_POF; /* new state */
	117	} else {
	118	/* conf data has been detected */
	119	cnf->buf_size = 0; /* buffer is empty */
	120	cnf->state = CONF_STATE_CONF; /* requested conf data write */
	121	if (cnf->card->state != CARD_STATE_RUN)
	122	return (-ERR_NOT_BOOTED);
	123	cnf->conf_line[CONF_LINE_LEN - 1] = 0; /* limit string length */
	124	cnf->channel = 4098; /* default channel for output */
	125	}
	126	} /* state was auto detect */
	127	if (cnf->state == CONF_STATE_POF) { /* pof write active */
	128	i = cnf->needed_size - cnf->buf_size; /* bytes still missing for write */
	129	if (i <= 0)
	130	return (-EINVAL); /* size error handling pof */
	131
	132	if (i < count)
	133	count = i; /* limit requested number of bytes */
	134	if (copy_from_user(cnf->pof_buffer + cnf->buf_size, buf, count))
	135	return (-EFAULT); /* error while copying */
	136	cnf->buf_size += count;
	137
	138	if (cnf->needed_size == cnf->buf_size) {
	139	cnf->needed_size = pof_write_buffer(cnf->card, cnf->buf_size); /* write data */
	140	if (cnf->needed_size <= 0) {
	141	cnf->card->state = CARD_STATE_BOOTERR; /* show boot error */
	142	return (cnf->needed_size); /* an error occurred */
	143	}
	144	cnf->buf_size = 0; /* buffer is empty again */
	145	}
	146	}
	147	/* pof write active */
	148	else { /* conf write active */
	149
	150	if (cnf->card->state != CARD_STATE_RUN) {
	151	if (cnf->card->debug_flags & LOG_CNF_MISC)
	152	hysdn_addlog(cnf->card, "cnf write denied -> not booted");
	153	return (-ERR_NOT_BOOTED);
	154	}
	155	i = (CONF_LINE_LEN - 1) - cnf->buf_size; /* bytes available in buffer */
	156	if (i > 0) {
	157	/* copy remaining bytes into buffer */
	158
	159	if (count > i)
	160	count = i; /* limit transfer */
	161	if (copy_from_user(cnf->conf_line + cnf->buf_size, buf, count))
	162	return (-EFAULT); /* error while copying */
	163
164	i = count; /* number of chars in buffer */
165	cp = cnf->conf_line + cnf->buf_size;
166	while (i) {
167	/* search for end of line */
168	if ((cp < ' ') && (cp != 9))
169	break; /* end of line found */
170	cp++;
171	i--;
172	} /* search for end of line */
173
174	if (i) {
175	/* delimiter found */
176	cp++ = 0; / string termination */
177	count -= (i - 1); /* subtract remaining bytes from count */
178	while ((i) && (cp < ' ') && (cp != 9)) {
179	i--; /* discard next char */
180	count++; /* mark as read */
181	cp++; /* next char */
182	}
183	cnf->buf_size = 0; /* buffer is empty after transfer */
184	if ((i = process_line(cnf)) < 0) /* handle the line */
185	count = i; /* return the error */
186	}
187	/* delimiter found */
188	else {
189	cnf->buf_size += count; /* add chars to string */
190	if (cnf->buf_size >= CONF_LINE_LEN - 1) {
191	if (cnf->card->debug_flags & LOG_CNF_MISC)
192	hysdn_addlog(cnf->card, "cnf line too long %d chars pos %d", cnf->buf_size, count);
193	return (-ERR_CONF_LONG);
194	}
195	} /* not delimited */
196
197	}
198	/* copy remaining bytes into buffer */
199	else {
200	if (cnf->card->debug_flags & LOG_CNF_MISC)
201	hysdn_addlog(cnf->card, "cnf line too long");
202	return (-ERR_CONF_LONG);
203	}
204	} /* conf write active */
205
206	return (count);
207	} /* hysdn_conf_write */
208
209	/*******************************************/
210	/* read conf file -> output card info data */
211	/*******************************************/
212	static ssize_t
ea23ec26	213	hysdn_conf_read(struct file file, char __user buf, size_t count, loff_t *off)
1da177e4 LT	214	{
1da177e4 LT	215	char *cp;
1da177e4	216
ea23ec26 AM	217	if (!(file->f_mode & FMODE_READ))
	218	return -EPERM; /* no permission to read */
	219
	220	if (!(cp = file->private_data))
	221	return -EFAULT; /* should never happen */
	222
	223	return simple_read_from_buffer(buf, count, off, cp, strlen(cp));
1da177e4 LT	224	} /* hysdn_conf_read */
	225
	226	/******************/
	227	/* open conf file */
	228	/******************/
	229	static int
	230	hysdn_conf_open(struct inode ino, struct file filep)
	231	{
	232	hysdn_card *card;
	233	struct proc_dir_entry *pd;
	234	struct conf_writedata *cnf;
	235	char cp, tmp;
	236
	237	/* now search the addressed card */
76a64921	238	mutex_lock(&hysdn_conf_mutex);
1da177e4 LT	239	card = card_root;
	240	while (card) {
	241	pd = card->procconf;
	242	if (pd == PDE(ino))
	243	break;
	244	card = card->next; /* search next entry */
	245	}
	246	if (!card) {
76a64921	247	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	248	return (-ENODEV); /* device is unknown/invalid */
	249	}
	250	if (card->debug_flags & (LOG_PROC_OPEN \| LOG_PROC_ALL))
	251	hysdn_addlog(card, "config open for uid=%d gid=%d mode=0x%x",
d76b0d9b DH	252	filep->f_cred->fsuid, filep->f_cred->fsgid,
d76b0d9b DH	253	filep->f_mode);
1da177e4 LT	254
	255	if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_WRITE) {
	256	/* write only access -> write boot file or conf line */
	257
	258	if (!(cnf = kmalloc(sizeof(struct conf_writedata), GFP_KERNEL))) {
76a64921	259	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	260	return (-EFAULT);
	261	}
	262	cnf->card = card;
	263	cnf->buf_size = 0; /* nothing buffered */
	264	cnf->state = CONF_STATE_DETECT; /* start auto detect */
	265	filep->private_data = cnf;
	266
	267	} else if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_READ) {
	268	/* read access -> output card info data */
	269
5cbded58	270	if (!(tmp = kmalloc(INFO_OUT_LEN * 2 + 2, GFP_KERNEL))) {
76a64921	271	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	272	return (-EFAULT); /* out of memory */
	273	}
	274	filep->private_data = tmp; /* start of string */
	275
	276	/* first output a headline */
	277	sprintf(tmp, "id bus slot type irq iobase dp-mem b-chans fax-chans state device");
	278	cp = tmp; /* start of string */
	279	while (*cp)
	280	cp++;
	281	while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
	282	*cp++ = ' ';
	283	*cp++ = '\n';
	284
	285	/* and now the data */
	286	sprintf(cp, "%d %3d %4d %4d %3d 0x%04x 0x%08lx %7d %9d %3d %s",
	287	card->myid,
	288	card->bus,
	289	PCI_SLOT(card->devfn),
	290	card->brdtype,
	291	card->irq,
	292	card->iobase,
	293	card->membase,
	294	card->bchans,
	295	card->faxchans,
	296	card->state,
	297	hysdn_net_getname(card));
	298	while (*cp)
	299	cp++;
	300	while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
	301	*cp++ = ' ';
	302	*cp++ = '\n';
	303	cp = 0; / end of string */
	304	} else { /* simultaneous read/write access forbidden ! */
76a64921	305	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	306	return (-EPERM); /* no permission this time */
1da177e4 LT	307	}
76a64921	308	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	309	return nonseekable_open(ino, filep);
	310	} /* hysdn_conf_open */
	311
	312	/***************************/
	313	/* close a config file. */
	314	/***************************/
	315	static int
	316	hysdn_conf_close(struct inode ino, struct file filep)
	317	{
	318	hysdn_card *card;
	319	struct conf_writedata *cnf;
	320	int retval = 0;
	321	struct proc_dir_entry *pd;
	322
76a64921	323	mutex_lock(&hysdn_conf_mutex);
1da177e4 LT	324	/* search the addressed card */
	325	card = card_root;
	326	while (card) {
	327	pd = card->procconf;
	328	if (pd == PDE(ino))
	329	break;
	330	card = card->next; /* search next entry */
	331	}
	332	if (!card) {
76a64921	333	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	334	return (-ENODEV); /* device is unknown/invalid */
	335	}
	336	if (card->debug_flags & (LOG_PROC_OPEN \| LOG_PROC_ALL))
	337	hysdn_addlog(card, "config close for uid=%d gid=%d mode=0x%x",
d76b0d9b DH	338	filep->f_cred->fsuid, filep->f_cred->fsgid,
d76b0d9b DH	339	filep->f_mode);
1da177e4 LT	340
	341	if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_WRITE) {
	342	/* write only access -> write boot file or conf line */
	343	if (filep->private_data) {
	344	cnf = filep->private_data;
	345
	346	if (cnf->state == CONF_STATE_POF)
	347	retval = pof_write_close(cnf->card); /* close the pof write */
	348	kfree(filep->private_data); /* free allocated memory for buffer */
	349
	350	} /* handle write private data */
	351	} else if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_READ) {
	352	/* read access -> output card info data */
	353
3c7208f2	354	kfree(filep->private_data); /* release memory */
1da177e4	355	}
76a64921	356	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	357	return (retval);
	358	} /* hysdn_conf_close */
	359
	360	/******************************************************/
	361	/* table for conf filesystem functions defined above. */
	362	/******************************************************/
2b8693c0	363	static const struct file_operations conf_fops =
1da177e4	364	{
ac41cfd1	365	.owner = THIS_MODULE,
1da177e4 LT	366	.llseek = no_llseek,
	367	.read = hysdn_conf_read,
	368	.write = hysdn_conf_write,
	369	.open = hysdn_conf_open,
	370	.release = hysdn_conf_close,
	371	};
	372
	373	/*****************************/
	374	/* hysdn subdir in /proc/net */
	375	/*****************************/
	376	struct proc_dir_entry *hysdn_proc_entry = NULL;
	377
	378	/*******************************************************************************/
	379	/* hysdn_procconf_init is called when the module is loaded and after the cards */
	380	/* have been detected. The needed proc dir and card config files are created. */
	381	/* The log init is called at last. */
	382	/*******************************************************************************/
	383	int
	384	hysdn_procconf_init(void)
	385	{
	386	hysdn_card *card;
c721bcce	387	unsigned char conf_name[20];
1da177e4	388
457c4cbc	389	hysdn_proc_entry = proc_mkdir(PROC_SUBDIR_NAME, init_net.proc_net);
1da177e4 LT	390	if (!hysdn_proc_entry) {
	391	printk(KERN_ERR "HYSDN: unable to create hysdn subdir\n");
	392	return (-1);
	393	}
	394	card = card_root; /* point to first card */
	395	while (card) {
	396
	397	sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
ac41cfd1 DL	398	if ((card->procconf = (void *) proc_create(conf_name,
ac41cfd1 DL	399	S_IFREG \| S_IRUGO \| S_IWUSR,
50457905 IM	400	hysdn_proc_entry,
50457905 IM	401	&conf_fops)) != NULL) {
1da177e4 LT	402	hysdn_proclog_init(card); /* init the log file entry */
	403	}
	404	card = card->next; /* next entry */
	405	}
	406
	407	printk(KERN_NOTICE "HYSDN: procfs Rev. %s initialised\n", hysdn_getrev(hysdn_procconf_revision));
	408	return (0);
	409	} /* hysdn_procconf_init */
	410
	411	/*************************************************************************************/
	412	/* hysdn_procconf_release is called when the module is unloaded and before the cards */
	413	/* resources are released. The module counter is assumed to be 0 ! */
	414	/*************************************************************************************/
	415	void
	416	hysdn_procconf_release(void)
	417	{
	418	hysdn_card *card;
c721bcce	419	unsigned char conf_name[20];
1da177e4 LT	420
	421	card = card_root; /* start with first card */
	422	while (card) {
	423
	424	sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
	425	if (card->procconf)
	426	remove_proc_entry(conf_name, hysdn_proc_entry);
	427
	428	hysdn_proclog_release(card); /* init the log file entry */
	429
	430	card = card->next; /* point to next card */
	431	}
	432
457c4cbc	433	remove_proc_entry(PROC_SUBDIR_NAME, init_net.proc_net);
1da177e4	434	}