209 lines
6.0 KiB
C
209 lines
6.0 KiB
C
/*
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*
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* Copyright 1999 Digi International (www.digi.com)
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* James Puzzo <jamesp at digi dot com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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*/
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#ifndef __DGRP_COMMON_H
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#define __DGRP_COMMON_H
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#define DIGI_VERSION "1.9-29"
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#include <linux/fs.h>
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#include <linux/timer.h>
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#include "drp.h"
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#define DGRP_TTIME 100
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#define DGRP_RTIME 100
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/************************************************************************
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* All global storage allocation.
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************************************************************************/
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extern int dgrp_rawreadok; /* Allow raw writing of input */
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extern int dgrp_register_cudevices; /* enable legacy cu devices */
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extern int dgrp_register_prdevices; /* enable transparent print devices */
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extern int dgrp_poll_tick; /* Poll interval - in ms */
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extern struct list_head nd_struct_list;
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struct dgrp_poll_data {
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spinlock_t poll_lock;
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struct timer_list timer;
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int poll_tick;
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ulong poll_round; /* Timer rouding factor */
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long node_active_count;
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};
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extern struct dgrp_poll_data dgrp_poll_data;
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extern void dgrp_poll_handler(unsigned long arg);
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/* from dgrp_mon_ops.c */
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extern void dgrp_register_mon_hook(struct proc_dir_entry *de);
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/* from dgrp_tty.c */
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extern int dgrp_tty_init(struct nd_struct *nd);
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extern void dgrp_tty_uninit(struct nd_struct *nd);
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/* from dgrp_ports_ops.c */
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extern void dgrp_register_ports_hook(struct proc_dir_entry *de);
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/* from dgrp_net_ops.c */
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extern void dgrp_register_net_hook(struct proc_dir_entry *de);
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/* from dgrp_dpa_ops.c */
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extern void dgrp_register_dpa_hook(struct proc_dir_entry *de);
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extern void dgrp_dpa_data(struct nd_struct *, int, u8 *, int);
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/* from dgrp_sysfs.c */
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extern void dgrp_create_class_sysfs_files(void);
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extern void dgrp_remove_class_sysfs_files(void);
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extern void dgrp_create_node_class_sysfs_files(struct nd_struct *nd);
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extern void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd);
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extern void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c);
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extern void dgrp_remove_tty_sysfs(struct device *c);
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/* from dgrp_specproc.c */
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/*
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* The list of DGRP entries with r/w capabilities. These
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* magic numbers are used for identification purposes.
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*/
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enum {
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DGRP_CONFIG = 1, /* Configure portservers */
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DGRP_NETDIR = 2, /* Directory for "net" devices */
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DGRP_MONDIR = 3, /* Directory for "mon" devices */
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DGRP_PORTSDIR = 4, /* Directory for "ports" devices */
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DGRP_INFO = 5, /* Get info. about the running module */
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DGRP_NODEINFO = 6, /* Get info. about the configured nodes */
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DGRP_DPADIR = 7, /* Directory for the "dpa" devices */
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};
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/*
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* Directions for proc handlers
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*/
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enum {
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INBOUND = 1, /* Data being written to kernel */
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OUTBOUND = 2, /* Data being read from the kernel */
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};
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/**
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* dgrp_proc_entry: structure for dgrp proc dirs
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* @id: ID number associated with this particular entry. Should be
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* unique across all of DGRP.
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* @name: text name associated with the /proc entry
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* @mode: file access permisssions for the /proc entry
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* @child: pointer to table describing a subdirectory for this entry
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* @de: pointer to directory entry for this object once registered. Used
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* to grab the handle of the object for unregistration
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* @excl_sem: semaphore to provide exclusive to struct
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* @excl_cnt: counter of current accesses
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*
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* Each entry in a DGRP proc directory is described with a
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* dgrp_proc_entry structure. A collection of these
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* entries (in an array) represents the members associated
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* with a particular /proc directory, and is referred to
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* as a table. All tables are terminated by an entry with
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* zeros for every member.
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*/
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struct dgrp_proc_entry {
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int id; /* Integer identifier */
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const char *name; /* ASCII identifier */
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mode_t mode; /* File access permissions */
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struct dgrp_proc_entry *child; /* Child pointer */
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/* file ops to use, pass NULL to use default */
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struct file_operations *proc_file_ops;
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struct proc_dir_entry *de; /* proc entry pointer */
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struct semaphore excl_sem; /* Protects exclusive access var */
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int excl_cnt; /* Counts number of curr accesses */
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};
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extern void dgrp_unregister_proc(void);
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extern void dgrp_register_proc(void);
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/*-----------------------------------------------------------------------*
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*
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* Declarations for common operations:
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*
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* (either used by more than one of net, mon, or tty,
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* or in interrupt context (i.e. the poller))
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*
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*-----------------------------------------------------------------------*/
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void dgrp_carrier(struct ch_struct *ch);
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extern int dgrp_inode_permission(struct inode *inode, int op);
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extern int dgrp_chk_perm(int mode, int op);
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/*
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* ID manipulation macros (where c1 & c2 are characters, i is
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* a long integer, and s is a character array of at least three members
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*/
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static inline void ID_TO_CHAR(long i, char *s)
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{
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s[0] = ((i & 0xff00)>>8);
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s[1] = (i & 0xff);
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s[2] = 0;
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}
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static inline long CHAR_TO_ID(char *s)
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{
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return ((s[0] & 0xff) << 8) | (s[1] & 0xff);
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}
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static inline struct nd_struct *nd_struct_get(long major)
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{
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struct nd_struct *nd;
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list_for_each_entry(nd, &nd_struct_list, list) {
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if (major == nd->nd_major)
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return nd;
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}
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return NULL;
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}
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static inline int nd_struct_add(struct nd_struct *entry)
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{
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struct nd_struct *ptr;
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ptr = nd_struct_get(entry->nd_major);
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if (ptr)
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return -EBUSY;
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list_add_tail(&entry->list, &nd_struct_list);
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return 0;
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}
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static inline int nd_struct_del(struct nd_struct *entry)
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{
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struct nd_struct *nd;
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nd = nd_struct_get(entry->nd_major);
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if (!nd)
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return -ENODEV;
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list_del(&nd->list);
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return 0;
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}
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#endif /* __DGRP_COMMON_H */
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