net: file_operations should be const
[linux-2.6.git] / net / irda / irnet / irnet_ppp.h
1 /*
2  *      IrNET protocol module : Synchronous PPP over an IrDA socket.
3  *
4  *              Jean II - HPL `00 - <jt@hpl.hp.com>
5  *
6  * This file contains all definitions and declarations necessary for the
7  * PPP part of the IrNET module.
8  * This file is a private header, so other modules don't want to know
9  * what's in there...
10  */
11
12 #ifndef IRNET_PPP_H
13 #define IRNET_PPP_H
14
15 /***************************** INCLUDES *****************************/
16
17 #include "irnet.h"              /* Module global include */
18
19 /************************ CONSTANTS & MACROS ************************/
20
21 /* /dev/irnet file constants */
22 #define IRNET_MAJOR     10      /* Misc range */
23 #define IRNET_MINOR     187     /* Official allocation */
24
25 /* IrNET control channel stuff */
26 #define IRNET_MAX_COMMAND       256     /* Max length of a command line */
27
28 /* PPP hardcore stuff */
29
30 /* Bits in rbits (PPP flags in irnet struct) */
31 #define SC_RCV_BITS     (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
32
33 /* Bit numbers in busy */
34 #define XMIT_BUSY       0
35 #define RECV_BUSY       1
36 #define XMIT_WAKEUP     2
37 #define XMIT_FULL       3
38
39 /* Queue management */
40 #define PPPSYNC_MAX_RQLEN       32      /* arbitrary */
41
42 /****************************** TYPES ******************************/
43
44
45 /**************************** PROTOTYPES ****************************/
46
47 /* ----------------------- CONTROL CHANNEL ----------------------- */
48 static inline ssize_t
49         irnet_ctrl_write(irnet_socket *,
50                          const char *,
51                          size_t);
52 static inline ssize_t
53         irnet_ctrl_read(irnet_socket *,
54                         struct file *,
55                         char *,
56                         size_t);
57 static inline unsigned int
58         irnet_ctrl_poll(irnet_socket *,
59                         struct file *,
60                         poll_table *);
61 /* ----------------------- CHARACTER DEVICE ----------------------- */
62 static int
63         dev_irnet_open(struct inode *,  /* fs callback : open */
64                        struct file *),
65         dev_irnet_close(struct inode *,
66                         struct file *);
67 static ssize_t
68         dev_irnet_write(struct file *,
69                         const char __user *,
70                         size_t,
71                         loff_t *),
72         dev_irnet_read(struct file *,
73                        char __user *,
74                        size_t,
75                        loff_t *);
76 static unsigned int
77         dev_irnet_poll(struct file *,
78                        poll_table *);
79 static long
80         dev_irnet_ioctl(struct file *,
81                         unsigned int,
82                         unsigned long);
83 /* ------------------------ PPP INTERFACE ------------------------ */
84 static inline struct sk_buff *
85         irnet_prepare_skb(irnet_socket *,
86                           struct sk_buff *);
87 static int
88         ppp_irnet_send(struct ppp_channel *,
89                       struct sk_buff *);
90 static int
91         ppp_irnet_ioctl(struct ppp_channel *,
92                         unsigned int,
93                         unsigned long);
94
95 /**************************** VARIABLES ****************************/
96
97 /* Filesystem callbacks (to call us) */
98 static const struct file_operations irnet_device_fops =
99 {
100         .owner          = THIS_MODULE,
101         .read           = dev_irnet_read,
102         .write          = dev_irnet_write,
103         .poll           = dev_irnet_poll,
104         .unlocked_ioctl = dev_irnet_ioctl,
105         .open           = dev_irnet_open,
106         .release        = dev_irnet_close
107   /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
108 };
109
110 /* Structure so that the misc major (drivers/char/misc.c) take care of us... */
111 static struct miscdevice irnet_misc_device =
112 {
113         IRNET_MINOR,
114         "irnet",
115         &irnet_device_fops
116 };
117
118 #endif /* IRNET_PPP_H */