diff options
Diffstat (limited to 'drivers/isdn/hysdn/hysdn_procconf.c')
| -rw-r--r-- | drivers/isdn/hysdn/hysdn_procconf.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/drivers/isdn/hysdn/hysdn_procconf.c b/drivers/isdn/hysdn/hysdn_procconf.c new file mode 100644 index 0000000..5da507e --- /dev/null +++ b/drivers/isdn/hysdn/hysdn_procconf.c @@ -0,0 +1,443 @@ +/* $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/module.h> +#include <linux/version.h> +#include <linux/poll.h> +#include <linux/proc_fs.h> +#include <linux/pci.h> +#include <linux/smp_lock.h> + +#include "hysdn_defs.h" + +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 */ + uchar conf_line[CONF_LINE_LEN]; /* buffered conf line */ + word channel; /* active channel number */ + uchar *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) +{ + uchar *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; + uchar 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; + int i; + + if (file->f_mode & FMODE_READ) { + if (!(cp = file->private_data)) + return (-EFAULT); /* should never happen */ + i = strlen(cp); /* get total string length */ + if (*off < i) { + /* still bytes to transfer */ + cp += *off; /* point to desired data offset */ + i -= *off; /* remaining length */ + if (i > count) + i = count; /* limit length to transfer */ + if (copy_to_user(buf, cp, i)) + return (-EFAULT); /* copy error */ + *off += i; /* adjust offset */ + } else + return (0); + } else + return (-EPERM); /* no permission to read */ + + return (i); +} /* 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 */ + lock_kernel(); + card = card_root; + while (card) { + pd = card->procconf; + if (pd == PDE(ino)) + break; + card = card->next; /* search next entry */ + } + if (!card) { + unlock_kernel(); + 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_uid, filep->f_gid, 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))) { + unlock_kernel(); + 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 = (char *) kmalloc(INFO_OUT_LEN * 2 + 2, GFP_KERNEL))) { + unlock_kernel(); + 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 ! */ + unlock_kernel(); + return (-EPERM); /* no permission this time */ + } + unlock_kernel(); + 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; + + lock_kernel(); + /* 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) { + unlock_kernel(); + 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_uid, filep->f_gid, 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 */ + + if (filep->private_data) + kfree(filep->private_data); /* release memory */ + } + unlock_kernel(); + return (retval); +} /* hysdn_conf_close */ + +/******************************************************/ +/* table for conf filesystem functions defined above. */ +/******************************************************/ +static struct file_operations conf_fops = +{ + .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; + uchar conf_name[20]; + + hysdn_proc_entry = create_proc_entry(PROC_SUBDIR_NAME, S_IFDIR | S_IRUGO | S_IXUGO, 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 *) create_proc_entry(conf_name, + S_IFREG | S_IRUGO | S_IWUSR, + hysdn_proc_entry)) != NULL) { + ((struct proc_dir_entry *) card->procconf)->proc_fops = &conf_fops; + ((struct proc_dir_entry *) card->procconf)->owner = THIS_MODULE; + 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; + uchar 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, proc_net); +} |