1 /* -*- linux-c -*- ------------------------------------------------------- *
2 *
3 * linux/include/linux/auto_fs.h
4 *
5 * Copyright 1997 Transmeta Corporation - All Rights Reserved
6 *
7 * This file is part of the Linux kernel and is made available under
8 * the terms of the GNU General Public License, version 2, or at your
9 * option, any later version, incorporated herein by reference.
10 *
11 * ----------------------------------------------------------------------- */
12
13
14 #ifndef _LINUX_AUTO_FS_H
15 #define _LINUX_AUTO_FS_H
16
17 #include <linux/version.h>
18 #include <linux/fs.h>
19 #include <linux/limits.h>
20 #include <linux/ioctl.h>
21 #include <asm/types.h>
22
23 #define AUTOFS_PROTO_VERSION 3
24
25 /*
26 * Architectures where both 32- and 64-bit binaries can be executed
27 * on 64-bit kernels need this. This keeps the structure format
28 * uniform, and makes sure the wait_queue_token isn't too big to be
29 * passed back down to the kernel.
30 *
31 * This assumes that on these architectures:
32 * mode 32 bit 64 bit
33 * -------------------------
34 * int 32 bit 32 bit
35 * long 32 bit 64 bit
36 *
37 * If so, 32-bit user-space code should be backwards compatible.
38 */
39
40 #if defined(__sparc__) || defined(__mips__)
41 typedef unsigned int autofs_wqt_t;
42 #else
43 typedef unsigned long autofs_wqt_t;
44 #endif
45
46 enum autofs_packet_type {
47 autofs_ptype_missing, /* Missing entry (mount request) */
48 autofs_ptype_expire, /* Expire entry (umount request) */
49 };
50
51 struct autofs_packet_hdr {
52 int proto_version; /* Protocol version */
53 enum autofs_packet_type type; /* Type of packet */
54 };
55
56 struct autofs_packet_missing {
57 struct autofs_packet_hdr hdr;
58 autofs_wqt_t wait_queue_token;
59 int len;
60 char name[NAME_MAX+1];
61 };
62
63 struct autofs_packet_expire {
64 struct autofs_packet_hdr hdr;
65 int len;
66 char name[NAME_MAX+1];
67 };
68
69 #define AUTOFS_IOC_READY _IO(0x93,0x60)
70 #define AUTOFS_IOC_FAIL _IO(0x93,0x61)
71 #define AUTOFS_IOC_CATATONIC _IO(0x93,0x62)
72 #define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int)
73 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
74 #define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire)
75
76 #ifdef __KERNEL__
77
78 /* Init function */
79 int init_autofs_fs(void);
80
81 #endif /* __KERNEL__ */
82
83 #endif /* _LINUX_AUTO_FS_H */
84
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