summaryrefslogtreecommitdiffstats
path: root/drivers/isdn/hysdn/hysdn_proclog.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/hysdn/hysdn_proclog.c')
-rw-r--r--drivers/isdn/hysdn/hysdn_proclog.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/drivers/isdn/hysdn/hysdn_proclog.c b/drivers/isdn/hysdn/hysdn_proclog.c
deleted file mode 100644
index 6e898b90e86e..000000000000
--- a/drivers/isdn/hysdn/hysdn_proclog.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/* $Id: hysdn_proclog.c,v 1.9.6.3 2001/09/23 22:24:54 kai Exp $
- *
- * Linux driver for HYSDN cards, /proc/net filesystem log functions.
- *
- * Author 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/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/kernel.h>
-
-#include "hysdn_defs.h"
-
-/* the proc subdir for the interface is defined in the procconf module */
-extern struct proc_dir_entry *hysdn_proc_entry;
-
-static DEFINE_MUTEX(hysdn_log_mutex);
-static void put_log_buffer(hysdn_card *card, char *cp);
-
-/*************************************************/
-/* structure keeping ascii log for device output */
-/*************************************************/
-struct log_data {
- struct log_data *next;
- unsigned long usage_cnt;/* number of files still to work */
- void *proc_ctrl; /* pointer to own control procdata structure */
- char log_start[2]; /* log string start (final len aligned by size) */
-};
-
-/**********************************************/
-/* structure holding proc entrys for one card */
-/**********************************************/
-struct procdata {
- struct proc_dir_entry *log; /* log entry */
- char log_name[15]; /* log filename */
- struct log_data *log_head, *log_tail; /* head and tail for queue */
- int if_used; /* open count for interface */
- unsigned char logtmp[LOG_MAX_LINELEN];
- wait_queue_head_t rd_queue;
-};
-
-
-/**********************************************/
-/* log function for cards error log interface */
-/**********************************************/
-void
-hysdn_card_errlog(hysdn_card *card, tErrLogEntry *logp, int maxsize)
-{
- char buf[ERRLOG_TEXT_SIZE + 40];
-
- sprintf(buf, "LOG 0x%08lX 0x%08lX : %s\n", logp->ulErrType, logp->ulErrSubtype, logp->ucText);
- put_log_buffer(card, buf); /* output the string */
-} /* hysdn_card_errlog */
-
-/***************************************************/
-/* Log function using format specifiers for output */
-/***************************************************/
-void
-hysdn_addlog(hysdn_card *card, char *fmt, ...)
-{
- struct procdata *pd = card->proclog;
- char *cp;
- va_list args;
-
- if (!pd)
- return; /* log structure non existent */
-
- cp = pd->logtmp;
- cp += sprintf(cp, "HYSDN: card %d ", card->myid);
-
- va_start(args, fmt);
- cp += vsprintf(cp, fmt, args);
- va_end(args);
- *cp++ = '\n';
- *cp = 0;
-
- if (card->debug_flags & DEB_OUT_SYSLOG)
- printk(KERN_INFO "%s", pd->logtmp);
- else
- put_log_buffer(card, pd->logtmp);
-
-} /* hysdn_addlog */
-
-/********************************************/
-/* put an log buffer into the log queue. */
-/* This buffer will be kept until all files */
-/* opened for read got the contents. */
-/* Flushes buffers not longer in use. */
-/********************************************/
-static void
-put_log_buffer(hysdn_card *card, char *cp)
-{
- struct log_data *ib;
- struct procdata *pd = card->proclog;
- unsigned long flags;
-
- if (!pd)
- return;
- if (!cp)
- return;
- if (!*cp)
- return;
- if (pd->if_used <= 0)
- return; /* no open file for read */
-
- if (!(ib = kmalloc(sizeof(struct log_data) + strlen(cp), GFP_ATOMIC)))
- return; /* no memory */
- strcpy(ib->log_start, cp); /* set output string */
- ib->next = NULL;
- ib->proc_ctrl = pd; /* point to own control structure */
- spin_lock_irqsave(&card->hysdn_lock, flags);
- ib->usage_cnt = pd->if_used;
- if (!pd->log_head)
- pd->log_head = ib; /* new head */
- else
- pd->log_tail->next = ib; /* follows existing messages */
- pd->log_tail = ib; /* new tail */
-
- /* delete old entrys */
- while (pd->log_head->next) {
- if ((pd->log_head->usage_cnt <= 0) &&
- (pd->log_head->next->usage_cnt <= 0)) {
- ib = pd->log_head;
- pd->log_head = pd->log_head->next;
- kfree(ib);
- } else {
- break;
- }
- } /* pd->log_head->next */
-
- spin_unlock_irqrestore(&card->hysdn_lock, flags);
-
- wake_up_interruptible(&(pd->rd_queue)); /* announce new entry */
-} /* put_log_buffer */
-
-
-/******************************/
-/* file operations and tables */
-/******************************/
-
-/****************************************/
-/* write log file -> set log level bits */
-/****************************************/
-static ssize_t
-hysdn_log_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
-{
- int rc;
- hysdn_card *card = file->private_data;
-
- rc = kstrtoul_from_user(buf, count, 0, &card->debug_flags);
- if (rc < 0)
- return rc;
- hysdn_addlog(card, "debug set to 0x%lx", card->debug_flags);
- return (count);
-} /* hysdn_log_write */
-
-/******************/
-/* read log file */
-/******************/
-static ssize_t
-hysdn_log_read(struct file *file, char __user *buf, size_t count, loff_t *off)
-{
- struct log_data *inf;
- int len;
- hysdn_card *card = PDE_DATA(file_inode(file));
-
- if (!(inf = *((struct log_data **) file->private_data))) {
- struct procdata *pd = card->proclog;
- if (file->f_flags & O_NONBLOCK)
- return (-EAGAIN);
-
- wait_event_interruptible(pd->rd_queue, (inf =
- *((struct log_data **) file->private_data)));
- }
- if (!inf)
- return (0);
-
- inf->usage_cnt--; /* new usage count */
- file->private_data = &inf->next; /* next structure */
- if ((len = strlen(inf->log_start)) <= count) {
- if (copy_to_user(buf, inf->log_start, len))
- return -EFAULT;
- *off += len;
- return (len);
- }
- return (0);
-} /* hysdn_log_read */
-
-/******************/
-/* open log file */
-/******************/
-static int
-hysdn_log_open(struct inode *ino, struct file *filep)
-{
- hysdn_card *card = PDE_DATA(ino);
-
- mutex_lock(&hysdn_log_mutex);
- if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
- /* write only access -> write log level only */
- filep->private_data = card; /* remember our own card */
- } else if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
- struct procdata *pd = card->proclog;
- unsigned long flags;
-
- /* read access -> log/debug read */
- spin_lock_irqsave(&card->hysdn_lock, flags);
- pd->if_used++;
- if (pd->log_head)
- filep->private_data = &pd->log_tail->next;
- else
- filep->private_data = &pd->log_head;
- spin_unlock_irqrestore(&card->hysdn_lock, flags);
- } else { /* simultaneous read/write access forbidden ! */
- mutex_unlock(&hysdn_log_mutex);
- return (-EPERM); /* no permission this time */
- }
- mutex_unlock(&hysdn_log_mutex);
- return nonseekable_open(ino, filep);
-} /* hysdn_log_open */
-
-/*******************************************************************************/
-/* close a cardlog file. If the file has been opened for exclusive write it is */
-/* assumed as pof data input and the pof loader is noticed about. */
-/* Otherwise file is handled as log output. In this case the interface usage */
-/* count is decremented and all buffers are noticed of closing. If this file */
-/* was the last one to be closed, all buffers are freed. */
-/*******************************************************************************/
-static int
-hysdn_log_close(struct inode *ino, struct file *filep)
-{
- struct log_data *inf;
- struct procdata *pd;
- hysdn_card *card;
- int retval = 0;
-
- mutex_lock(&hysdn_log_mutex);
- if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
- /* write only access -> write debug level written */
- retval = 0; /* success */
- } else {
- /* read access -> log/debug read, mark one further file as closed */
-
- inf = *((struct log_data **) filep->private_data); /* get first log entry */
- if (inf)
- pd = (struct procdata *) inf->proc_ctrl; /* still entries there */
- else {
- /* no info available -> search card */
- card = PDE_DATA(file_inode(filep));
- pd = card->proclog; /* pointer to procfs log */
- }
- if (pd)
- pd->if_used--; /* decrement interface usage count by one */
-
- while (inf) {
- inf->usage_cnt--; /* decrement usage count for buffers */
- inf = inf->next;
- }
-
- if (pd)
- if (pd->if_used <= 0) /* delete buffers if last file closed */
- while (pd->log_head) {
- inf = pd->log_head;
- pd->log_head = pd->log_head->next;
- kfree(inf);
- }
- } /* read access */
- mutex_unlock(&hysdn_log_mutex);
-
- return (retval);
-} /* hysdn_log_close */
-
-/*************************************************/
-/* select/poll routine to be able using select() */
-/*************************************************/
-static __poll_t
-hysdn_log_poll(struct file *file, poll_table *wait)
-{
- __poll_t mask = 0;
- hysdn_card *card = PDE_DATA(file_inode(file));
- struct procdata *pd = card->proclog;
-
- if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE)
- return (mask); /* no polling for write supported */
-
- poll_wait(file, &(pd->rd_queue), wait);
-
- if (*((struct log_data **) file->private_data))
- mask |= EPOLLIN | EPOLLRDNORM;
-
- return mask;
-} /* hysdn_log_poll */
-
-/**************************************************/
-/* table for log filesystem functions defined above. */
-/**************************************************/
-static const struct file_operations log_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = hysdn_log_read,
- .write = hysdn_log_write,
- .poll = hysdn_log_poll,
- .open = hysdn_log_open,
- .release = hysdn_log_close,
-};
-
-
-/***********************************************************************************/
-/* hysdn_proclog_init is called when the module is loaded after creating the cards */
-/* conf files. */
-/***********************************************************************************/
-int
-hysdn_proclog_init(hysdn_card *card)
-{
- struct procdata *pd;
-
- /* create a cardlog proc entry */
-
- if ((pd = kzalloc(sizeof(struct procdata), GFP_KERNEL)) != NULL) {
- sprintf(pd->log_name, "%s%d", PROC_LOG_BASENAME, card->myid);
- pd->log = proc_create_data(pd->log_name,
- S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry,
- &log_fops, card);
-
- init_waitqueue_head(&(pd->rd_queue));
-
- card->proclog = (void *) pd; /* remember procfs structure */
- }
- return (0);
-} /* hysdn_proclog_init */
-
-/************************************************************************************/
-/* hysdn_proclog_release is called when the module is unloaded and before the cards */
-/* conf file is released */
-/* The module counter is assumed to be 0 ! */
-/************************************************************************************/
-void
-hysdn_proclog_release(hysdn_card *card)
-{
- struct procdata *pd;
-
- if ((pd = (struct procdata *) card->proclog) != NULL) {
- if (pd->log)
- remove_proc_entry(pd->log_name, hysdn_proc_entry);
- kfree(pd); /* release memory */
- card->proclog = NULL;
- }
-} /* hysdn_proclog_release */