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1 | /* |
2 | * | |
3 | * Copyright 1999 Digi International (www.digi.com) | |
4 | * James Puzzo <jamesp at digi dot com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the | |
13 | * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
14 | * PURPOSE. See the GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
18 | #ifndef __DGRP_COMMON_H | |
19 | #define __DGRP_COMMON_H | |
20 | ||
21 | #define DIGI_VERSION "1.9-29" | |
22 | ||
23 | #include <linux/fs.h> | |
24 | #include <linux/timer.h> | |
25 | #include "drp.h" | |
26 | ||
27 | #define DGRP_TTIME 100 | |
28 | #define DGRP_RTIME 100 | |
29 | ||
30 | /************************************************************************ | |
31 | * All global storage allocation. | |
32 | ************************************************************************/ | |
33 | ||
34 | extern int dgrp_rawreadok; /* Allow raw writing of input */ | |
35 | extern int dgrp_register_cudevices; /* enable legacy cu devices */ | |
36 | extern int dgrp_register_prdevices; /* enable transparent print devices */ | |
37 | extern int dgrp_poll_tick; /* Poll interval - in ms */ | |
38 | ||
39 | extern struct list_head nd_struct_list; | |
40 | ||
41 | struct dgrp_poll_data { | |
42 | spinlock_t poll_lock; | |
43 | struct timer_list timer; | |
44 | int poll_tick; | |
45 | ulong poll_round; /* Timer rouding factor */ | |
46 | long node_active_count; | |
47 | }; | |
48 | ||
49 | extern struct dgrp_poll_data dgrp_poll_data; | |
50 | extern void dgrp_poll_handler(unsigned long arg); | |
51 | ||
52 | /* from dgrp_mon_ops.c */ | |
53 | extern void dgrp_register_mon_hook(struct proc_dir_entry *de); | |
54 | ||
55 | /* from dgrp_tty.c */ | |
56 | extern int dgrp_tty_init(struct nd_struct *nd); | |
57 | extern void dgrp_tty_uninit(struct nd_struct *nd); | |
58 | ||
59 | /* from dgrp_ports_ops.c */ | |
60 | extern void dgrp_register_ports_hook(struct proc_dir_entry *de); | |
61 | ||
62 | /* from dgrp_net_ops.c */ | |
63 | extern void dgrp_register_net_hook(struct proc_dir_entry *de); | |
64 | ||
65 | /* from dgrp_dpa_ops.c */ | |
66 | extern void dgrp_register_dpa_hook(struct proc_dir_entry *de); | |
67 | extern void dgrp_dpa_data(struct nd_struct *, int, u8 *, int); | |
68 | ||
69 | /* from dgrp_sysfs.c */ | |
70 | extern void dgrp_create_class_sysfs_files(void); | |
71 | extern void dgrp_remove_class_sysfs_files(void); | |
72 | ||
73 | extern void dgrp_create_node_class_sysfs_files(struct nd_struct *nd); | |
74 | extern void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd); | |
75 | ||
76 | extern void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c); | |
77 | extern void dgrp_remove_tty_sysfs(struct device *c); | |
78 | ||
79 | /* from dgrp_specproc.c */ | |
80 | /* | |
81 | * The list of DGRP entries with r/w capabilities. These | |
82 | * magic numbers are used for identification purposes. | |
83 | */ | |
84 | enum { | |
85 | DGRP_CONFIG = 1, /* Configure portservers */ | |
86 | DGRP_NETDIR = 2, /* Directory for "net" devices */ | |
87 | DGRP_MONDIR = 3, /* Directory for "mon" devices */ | |
88 | DGRP_PORTSDIR = 4, /* Directory for "ports" devices */ | |
89 | DGRP_INFO = 5, /* Get info. about the running module */ | |
90 | DGRP_NODEINFO = 6, /* Get info. about the configured nodes */ | |
91 | DGRP_DPADIR = 7, /* Directory for the "dpa" devices */ | |
92 | }; | |
93 | ||
94 | /* | |
95 | * Directions for proc handlers | |
96 | */ | |
97 | enum { | |
98 | INBOUND = 1, /* Data being written to kernel */ | |
99 | OUTBOUND = 2, /* Data being read from the kernel */ | |
100 | }; | |
101 | ||
102 | /** | |
103 | * dgrp_proc_entry: structure for dgrp proc dirs | |
104 | * @id: ID number associated with this particular entry. Should be | |
105 | * unique across all of DGRP. | |
106 | * @name: text name associated with the /proc entry | |
107 | * @mode: file access permisssions for the /proc entry | |
108 | * @child: pointer to table describing a subdirectory for this entry | |
109 | * @de: pointer to directory entry for this object once registered. Used | |
110 | * to grab the handle of the object for unregistration | |
111 | * @excl_sem: semaphore to provide exclusive to struct | |
112 | * @excl_cnt: counter of current accesses | |
113 | * | |
114 | * Each entry in a DGRP proc directory is described with a | |
115 | * dgrp_proc_entry structure. A collection of these | |
116 | * entries (in an array) represents the members associated | |
117 | * with a particular /proc directory, and is referred to | |
118 | * as a table. All tables are terminated by an entry with | |
119 | * zeros for every member. | |
120 | */ | |
121 | struct dgrp_proc_entry { | |
122 | int id; /* Integer identifier */ | |
123 | const char *name; /* ASCII identifier */ | |
124 | mode_t mode; /* File access permissions */ | |
125 | struct dgrp_proc_entry *child; /* Child pointer */ | |
126 | ||
127 | /* file ops to use, pass NULL to use default */ | |
128 | struct file_operations *proc_file_ops; | |
129 | ||
130 | struct proc_dir_entry *de; /* proc entry pointer */ | |
131 | struct semaphore excl_sem; /* Protects exclusive access var */ | |
132 | int excl_cnt; /* Counts number of curr accesses */ | |
133 | }; | |
134 | ||
135 | extern void dgrp_unregister_proc(void); | |
136 | extern void dgrp_register_proc(void); | |
137 | ||
138 | /*-----------------------------------------------------------------------* | |
139 | * | |
140 | * Declarations for common operations: | |
141 | * | |
142 | * (either used by more than one of net, mon, or tty, | |
143 | * or in interrupt context (i.e. the poller)) | |
144 | * | |
145 | *-----------------------------------------------------------------------*/ | |
146 | ||
147 | void dgrp_carrier(struct ch_struct *ch); | |
148 | extern int dgrp_inode_permission(struct inode *inode, int op); | |
149 | extern int dgrp_chk_perm(int mode, int op); | |
150 | ||
151 | ||
152 | /* | |
153 | * ID manipulation macros (where c1 & c2 are characters, i is | |
154 | * a long integer, and s is a character array of at least three members | |
155 | */ | |
156 | ||
157 | static inline void ID_TO_CHAR(long i, char *s) | |
158 | { | |
159 | s[0] = ((i & 0xff00)>>8); | |
160 | s[1] = (i & 0xff); | |
161 | s[2] = 0; | |
162 | } | |
163 | ||
164 | static inline long CHAR_TO_ID(char *s) | |
165 | { | |
166 | return ((s[0] & 0xff) << 8) | (s[1] & 0xff); | |
167 | } | |
168 | ||
169 | static inline struct nd_struct *nd_struct_get(long major) | |
170 | { | |
171 | struct nd_struct *nd; | |
172 | ||
173 | list_for_each_entry(nd, &nd_struct_list, list) { | |
174 | if (major == nd->nd_major) | |
175 | return nd; | |
176 | } | |
177 | ||
178 | return NULL; | |
179 | } | |
180 | ||
181 | static inline int nd_struct_add(struct nd_struct *entry) | |
182 | { | |
183 | struct nd_struct *ptr; | |
184 | ||
185 | ptr = nd_struct_get(entry->nd_major); | |
186 | ||
187 | if (ptr) | |
188 | return -EBUSY; | |
189 | ||
190 | list_add_tail(&entry->list, &nd_struct_list); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static inline int nd_struct_del(struct nd_struct *entry) | |
196 | { | |
197 | struct nd_struct *nd; | |
198 | ||
199 | nd = nd_struct_get(entry->nd_major); | |
200 | ||
201 | if (!nd) | |
202 | return -ENODEV; | |
203 | ||
204 | list_del(&nd->list); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | #endif /* __DGRP_COMMON_H */ |