[mirror_ubuntu-bionic-kernel.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);

#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 conf_writedata *cnf;
	char *cp, *tmp;

	/* now search the addressed card */
	mutex_lock(&hysdn_conf_mutex);
	card = PDE_DATA(ino);
	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;

	mutex_lock(&hysdn_conf_mutex);
	card = PDE_DATA(ino);
	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_data(conf_name,
							   S_IFREG | S_IRUGO | S_IWUSR,
							   hysdn_proc_entry,
							   &conf_fops,
							   card)) != NULL) {
			hysdn_proclog_init(card);	/* init the log file entry */
		}
		card = card->next;	/* next entry */
	}

	printk(KERN_NOTICE "HYSDN: procfs initialised\n");
	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
	27	#define INFO_OUT_LEN 80 /* length of info line including lf */
	28
	29	/********************************************************/
	30	/* defines and data structure for conf write operations */
	31	/********************************************************/
	32	#define CONF_STATE_DETECT 0 /* waiting for detect */
	33	#define CONF_STATE_CONF 1 /* writing config data */
	34	#define CONF_STATE_POF 2 /* writing pof data */
	35	#define CONF_LINE_LEN 255 /* 255 chars max */
	36
	37	struct conf_writedata {
	38	hysdn_card card; / card the device is connected to */
	39	int buf_size; /* actual number of bytes in the buffer */
	40	int needed_size; /* needed size when reading pof */
	41	int state; /* actual interface states from above constants */
c721bcce AM	42	unsigned char conf_line[CONF_LINE_LEN]; /* buffered conf line */
	43	unsigned short channel; /* active channel number */
	44	unsigned char pof_buffer; / buffer when writing pof */
1da177e4 LT	45	};
	46
	47	/***********************************************************************/
	48	/* process_line parses one config line and transfers it to the card if */
	49	/* necessary. */
	50	/* if the return value is negative an error occurred. */
	51	/***********************************************************************/
	52	static int
	53	process_line(struct conf_writedata *cnf)
	54	{
c721bcce	55	unsigned char *cp = cnf->conf_line;
1da177e4 LT	56	int i;
	57
	58	if (cnf->card->debug_flags & LOG_CNF_LINE)
	59	hysdn_addlog(cnf->card, "conf line: %s", cp);
	60
	61	if (cp == '-') { / option */
	62	cp++; /* point to option char */
	63
	64	if (*cp++ != 'c')
	65	return (0); /* option unknown or used */
	66	i = 0; /* start value for channel */
	67	while ((cp <= '9') && (cp >= '0'))
	68	i = i * 10 + cp++ - '0'; / get decimal number */
	69	if (i > 65535) {
	70	if (cnf->card->debug_flags & LOG_CNF_MISC)
	71	hysdn_addlog(cnf->card, "conf channel invalid %d", i);
	72	return (-ERR_INV_CHAN); /* invalid channel */
	73	}
	74	cnf->channel = i & 0xFFFF; /* set new channel number */
	75	return (0); /* success */
	76	} /* option */
	77	if (cp == '') { /* line to send */
	78	if (cnf->card->debug_flags & LOG_CNF_DATA)
	79	hysdn_addlog(cnf->card, "conf chan=%d %s", cnf->channel, cp);
	80	return (hysdn_tx_cfgline(cnf->card, cnf->conf_line + 1,
	81	cnf->channel)); /* send the line without * */
	82	} /* line to send */
	83	return (0);
	84	} /* process_line */
	85
	86	/***********************************/
	87	/* conf file operations and tables */
	88	/***********************************/
	89
	90	/****************************************************/
	91	/* write conf file -> boot or send cfg line to card */
	92	/****************************************************/
	93	static ssize_t
475be4d8	94	hysdn_conf_write(struct file file, const char __user buf, size_t count, loff_t *off)
1da177e4 LT	95	{
	96	struct conf_writedata *cnf;
	97	int i;
c721bcce	98	unsigned char ch, *cp;
1da177e4 LT	99
	100	if (!count)
	101	return (0); /* nothing to handle */
	102
	103	if (!(cnf = file->private_data))
	104	return (-EFAULT); /* should never happen */
	105
	106	if (cnf->state == CONF_STATE_DETECT) { /* auto detect cnf or pof data */
	107	if (copy_from_user(&ch, buf, 1)) /* get first char for detect */
	108	return (-EFAULT);
	109
	110	if (ch == 0x1A) {
	111	/* we detected a pof file */
	112	if ((cnf->needed_size = pof_write_open(cnf->card, &cnf->pof_buffer)) <= 0)
	113	return (cnf->needed_size); /* an error occurred -> exit */
	114	cnf->buf_size = 0; /* buffer is empty */
	115	cnf->state = CONF_STATE_POF; /* new state */
	116	} else {
	117	/* conf data has been detected */
	118	cnf->buf_size = 0; /* buffer is empty */
	119	cnf->state = CONF_STATE_CONF; /* requested conf data write */
	120	if (cnf->card->state != CARD_STATE_RUN)
	121	return (-ERR_NOT_BOOTED);
	122	cnf->conf_line[CONF_LINE_LEN - 1] = 0; /* limit string length */
	123	cnf->channel = 4098; /* default channel for output */
	124	}
	125	} /* state was auto detect */
	126	if (cnf->state == CONF_STATE_POF) { /* pof write active */
	127	i = cnf->needed_size - cnf->buf_size; /* bytes still missing for write */
	128	if (i <= 0)
	129	return (-EINVAL); /* size error handling pof */
	130
	131	if (i < count)
	132	count = i; /* limit requested number of bytes */
	133	if (copy_from_user(cnf->pof_buffer + cnf->buf_size, buf, count))
	134	return (-EFAULT); /* error while copying */
	135	cnf->buf_size += count;
	136
	137	if (cnf->needed_size == cnf->buf_size) {
	138	cnf->needed_size = pof_write_buffer(cnf->card, cnf->buf_size); /* write data */
	139	if (cnf->needed_size <= 0) {
	140	cnf->card->state = CARD_STATE_BOOTERR; /* show boot error */
	141	return (cnf->needed_size); /* an error occurred */
	142	}
	143	cnf->buf_size = 0; /* buffer is empty again */
	144	}
	145	}
	146	/* pof write active */
	147	else { /* conf write active */
	148
	149	if (cnf->card->state != CARD_STATE_RUN) {
	150	if (cnf->card->debug_flags & LOG_CNF_MISC)
	151	hysdn_addlog(cnf->card, "cnf write denied -> not booted");
	152	return (-ERR_NOT_BOOTED);
	153	}
	154	i = (CONF_LINE_LEN - 1) - cnf->buf_size; /* bytes available in buffer */
	155	if (i > 0) {
	156	/* copy remaining bytes into buffer */
	157
	158	if (count > i)
	159	count = i; /* limit transfer */
	160	if (copy_from_user(cnf->conf_line + cnf->buf_size, buf, count))
	161	return (-EFAULT); /* error while copying */
	162
163	i = count; /* number of chars in buffer */
164	cp = cnf->conf_line + cnf->buf_size;
165	while (i) {
166	/* search for end of line */
167	if ((cp < ' ') && (cp != 9))
168	break; /* end of line found */
169	cp++;
170	i--;
171	} /* search for end of line */
172
173	if (i) {
174	/* delimiter found */
175	cp++ = 0; / string termination */
176	count -= (i - 1); /* subtract remaining bytes from count */
177	while ((i) && (cp < ' ') && (cp != 9)) {
178	i--; /* discard next char */
179	count++; /* mark as read */
180	cp++; /* next char */
181	}
182	cnf->buf_size = 0; /* buffer is empty after transfer */
183	if ((i = process_line(cnf)) < 0) /* handle the line */
184	count = i; /* return the error */
185	}
186	/* delimiter found */
187	else {
188	cnf->buf_size += count; /* add chars to string */
189	if (cnf->buf_size >= CONF_LINE_LEN - 1) {
190	if (cnf->card->debug_flags & LOG_CNF_MISC)
191	hysdn_addlog(cnf->card, "cnf line too long %d chars pos %d", cnf->buf_size, count);
192	return (-ERR_CONF_LONG);
193	}
194	} /* not delimited */
195
196	}
197	/* copy remaining bytes into buffer */
198	else {
199	if (cnf->card->debug_flags & LOG_CNF_MISC)
200	hysdn_addlog(cnf->card, "cnf line too long");
201	return (-ERR_CONF_LONG);
202	}
203	} /* conf write active */
204
205	return (count);
206	} /* hysdn_conf_write */
207
208	/*******************************************/
209	/* read conf file -> output card info data */
210	/*******************************************/
211	static ssize_t
ea23ec26	212	hysdn_conf_read(struct file file, char __user buf, size_t count, loff_t *off)
1da177e4 LT	213	{
1da177e4 LT	214	char *cp;
1da177e4	215
ea23ec26 AM	216	if (!(file->f_mode & FMODE_READ))
	217	return -EPERM; /* no permission to read */
	218
	219	if (!(cp = file->private_data))
	220	return -EFAULT; /* should never happen */
	221
	222	return simple_read_from_buffer(buf, count, off, cp, strlen(cp));
1da177e4 LT	223	} /* hysdn_conf_read */
	224
	225	/******************/
	226	/* open conf file */
	227	/******************/
	228	static int
	229	hysdn_conf_open(struct inode ino, struct file filep)
	230	{
	231	hysdn_card *card;
1da177e4 LT	232	struct conf_writedata *cnf;
	233	char cp, tmp;
	234
	235	/* now search the addressed card */
76a64921	236	mutex_lock(&hysdn_conf_mutex);
d9dda78b	237	card = PDE_DATA(ino);
1da177e4 LT	238	if (card->debug_flags & (LOG_PROC_OPEN \| LOG_PROC_ALL))
1da177e4 LT	239	hysdn_addlog(card, "config open for uid=%d gid=%d mode=0x%x",
d76b0d9b DH	240	filep->f_cred->fsuid, filep->f_cred->fsgid,
d76b0d9b DH	241	filep->f_mode);
1da177e4 LT	242
	243	if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_WRITE) {
	244	/* write only access -> write boot file or conf line */
	245
	246	if (!(cnf = kmalloc(sizeof(struct conf_writedata), GFP_KERNEL))) {
76a64921	247	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	248	return (-EFAULT);
	249	}
	250	cnf->card = card;
	251	cnf->buf_size = 0; /* nothing buffered */
	252	cnf->state = CONF_STATE_DETECT; /* start auto detect */
	253	filep->private_data = cnf;
	254
	255	} else if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_READ) {
	256	/* read access -> output card info data */
	257
5cbded58	258	if (!(tmp = kmalloc(INFO_OUT_LEN * 2 + 2, GFP_KERNEL))) {
76a64921	259	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	260	return (-EFAULT); /* out of memory */
	261	}
	262	filep->private_data = tmp; /* start of string */
	263
	264	/* first output a headline */
	265	sprintf(tmp, "id bus slot type irq iobase dp-mem b-chans fax-chans state device");
	266	cp = tmp; /* start of string */
	267	while (*cp)
	268	cp++;
	269	while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
	270	*cp++ = ' ';
	271	*cp++ = '\n';
	272
	273	/* and now the data */
	274	sprintf(cp, "%d %3d %4d %4d %3d 0x%04x 0x%08lx %7d %9d %3d %s",
	275	card->myid,
	276	card->bus,
	277	PCI_SLOT(card->devfn),
	278	card->brdtype,
	279	card->irq,
	280	card->iobase,
	281	card->membase,
	282	card->bchans,
	283	card->faxchans,
	284	card->state,
	285	hysdn_net_getname(card));
	286	while (*cp)
	287	cp++;
	288	while (((cp - tmp) % (INFO_OUT_LEN + 1)) != INFO_OUT_LEN)
	289	*cp++ = ' ';
	290	*cp++ = '\n';
	291	cp = 0; / end of string */
	292	} else { /* simultaneous read/write access forbidden ! */
76a64921	293	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	294	return (-EPERM); /* no permission this time */
1da177e4 LT	295	}
76a64921	296	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	297	return nonseekable_open(ino, filep);
	298	} /* hysdn_conf_open */
	299
	300	/***************************/
	301	/* close a config file. */
	302	/***************************/
	303	static int
	304	hysdn_conf_close(struct inode ino, struct file filep)
	305	{
	306	hysdn_card *card;
	307	struct conf_writedata *cnf;
	308	int retval = 0;
1da177e4	309
76a64921	310	mutex_lock(&hysdn_conf_mutex);
d9dda78b	311	card = PDE_DATA(ino);
1da177e4 LT	312	if (card->debug_flags & (LOG_PROC_OPEN \| LOG_PROC_ALL))
1da177e4 LT	313	hysdn_addlog(card, "config close for uid=%d gid=%d mode=0x%x",
d76b0d9b DH	314	filep->f_cred->fsuid, filep->f_cred->fsgid,
d76b0d9b DH	315	filep->f_mode);
1da177e4 LT	316
	317	if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_WRITE) {
	318	/* write only access -> write boot file or conf line */
	319	if (filep->private_data) {
	320	cnf = filep->private_data;
	321
	322	if (cnf->state == CONF_STATE_POF)
	323	retval = pof_write_close(cnf->card); /* close the pof write */
	324	kfree(filep->private_data); /* free allocated memory for buffer */
	325
	326	} /* handle write private data */
	327	} else if ((filep->f_mode & (FMODE_READ \| FMODE_WRITE)) == FMODE_READ) {
	328	/* read access -> output card info data */
	329
3c7208f2	330	kfree(filep->private_data); /* release memory */
1da177e4	331	}
76a64921	332	mutex_unlock(&hysdn_conf_mutex);
1da177e4 LT	333	return (retval);
	334	} /* hysdn_conf_close */
	335
	336	/******************************************************/
	337	/* table for conf filesystem functions defined above. */
	338	/******************************************************/
2b8693c0	339	static const struct file_operations conf_fops =
1da177e4	340	{
ac41cfd1	341	.owner = THIS_MODULE,
1da177e4 LT	342	.llseek = no_llseek,
	343	.read = hysdn_conf_read,
	344	.write = hysdn_conf_write,
	345	.open = hysdn_conf_open,
475be4d8	346	.release = hysdn_conf_close,
1da177e4 LT	347	};
	348
	349	/*****************************/
	350	/* hysdn subdir in /proc/net */
	351	/*****************************/
	352	struct proc_dir_entry *hysdn_proc_entry = NULL;
	353
	354	/*******************************************************************************/
	355	/* hysdn_procconf_init is called when the module is loaded and after the cards */
	356	/* have been detected. The needed proc dir and card config files are created. */
	357	/* The log init is called at last. */
	358	/*******************************************************************************/
	359	int
	360	hysdn_procconf_init(void)
	361	{
	362	hysdn_card *card;
c721bcce	363	unsigned char conf_name[20];
1da177e4	364
457c4cbc	365	hysdn_proc_entry = proc_mkdir(PROC_SUBDIR_NAME, init_net.proc_net);
1da177e4 LT	366	if (!hysdn_proc_entry) {
	367	printk(KERN_ERR "HYSDN: unable to create hysdn subdir\n");
	368	return (-1);
	369	}
	370	card = card_root; /* point to first card */
	371	while (card) {
	372
	373	sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
4d8e8d21	374	if ((card->procconf = (void *) proc_create_data(conf_name,
475be4d8 JP	375	S_IFREG \| S_IRUGO \| S_IWUSR,
475be4d8 JP	376	hysdn_proc_entry,
4d8e8d21 AV	377	&conf_fops,
4d8e8d21 AV	378	card)) != NULL) {
1da177e4 LT	379	hysdn_proclog_init(card); /* init the log file entry */
	380	}
	381	card = card->next; /* next entry */
	382	}
	383
cd141eee	384	printk(KERN_NOTICE "HYSDN: procfs initialised\n");
1da177e4 LT	385	return (0);
	386	} /* hysdn_procconf_init */
	387
	388	/*************************************************************************************/
	389	/* hysdn_procconf_release is called when the module is unloaded and before the cards */
	390	/* resources are released. The module counter is assumed to be 0 ! */
	391	/*************************************************************************************/
	392	void
	393	hysdn_procconf_release(void)
	394	{
	395	hysdn_card *card;
c721bcce	396	unsigned char conf_name[20];
1da177e4 LT	397
	398	card = card_root; /* start with first card */
	399	while (card) {
	400
	401	sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
	402	if (card->procconf)
	403	remove_proc_entry(conf_name, hysdn_proc_entry);
	404
	405	hysdn_proclog_release(card); /* init the log file entry */
	406
	407	card = card->next; /* point to next card */
	408	}
	409
457c4cbc	410	remove_proc_entry(PROC_SUBDIR_NAME, init_net.proc_net);
1da177e4	411	}