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 #ifdef __KERNEL__
18 #include <linux/fs.h>
19 #include <linux/limits.h>
20 #include <asm/types.h>
21 #endif /* __KERNEL__ */
22
23 #include <linux/ioctl.h>
24
25 /* This file describes autofs v3 */
26 #define AUTOFS_PROTO_VERSION 3
27
28 /* Range of protocol versions defined */
29 #define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
30 #define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
31
32 /*
33 * Architectures where both 32- and 64-bit binaries can be executed
34 * on 64-bit kernels need this. This keeps the structure format
35 * uniform, and makes sure the wait_queue_token isn't too big to be
36 * passed back down to the kernel.
37 *
38 * This assumes that on these architectures:
39 * mode 32 bit 64 bit
40 * -------------------------
41 * int 32 bit 32 bit
42 * long 32 bit 64 bit
43 *
44 * If so, 32-bit user-space code should be backwards compatible.
45 */
46
47 #if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
48 || defined(__powerpc__) || defined(__s390__)
49 typedef unsigned int autofs_wqt_t;
50 #else
51 typedef unsigned long autofs_wqt_t;
52 #endif
53
54 /* Packet types */
55 #define autofs_ptype_missing 0 /* Missing entry (mount request) */
56 #define autofs_ptype_expire 1 /* Expire entry (umount request) */
57
58 struct autofs_packet_hdr {
59 int proto_version; /* Protocol version */
60 int type; /* Type of packet */
61 };
62
63 struct autofs_packet_missing {
64 struct autofs_packet_hdr hdr;
65 autofs_wqt_t wait_queue_token;
66 int len;
67 char name[NAME_MAX+1];
68 };
69
70 /* v3 expire (via ioctl) */
71 struct autofs_packet_expire {
72 struct autofs_packet_hdr hdr;
73 int len;
74 char name[NAME_MAX+1];
75 };
76
77 #define AUTOFS_IOC_READY _IO(0x93,0x60)
78 #define AUTOFS_IOC_FAIL _IO(0x93,0x61)
79 #define AUTOFS_IOC_CATATONIC _IO(0x93,0x62)
80 #define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int)
81 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
82 #define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire)
83
84 #endif /* _LINUX_AUTO_FS_H */
85
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