blob: 8b49ac48a5b7216550063d550440756000a83e77 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* -*- c -*-
2 * linux/include/linux/auto_fs4.h
3 *
4 * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
5 *
6 * This file is part of the Linux kernel and is made available under
7 * the terms of the GNU General Public License, version 2, or at your
8 * option, any later version, incorporated herein by reference.
9 */
10
11#ifndef _LINUX_AUTO_FS4_H
12#define _LINUX_AUTO_FS4_H
13
14/* Include common v3 definitions */
Jaswinder Singh Rajput5d461bf2009-01-30 20:31:19 +053015#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/auto_fs.h>
17
18/* autofs v4 definitions */
19#undef AUTOFS_PROTO_VERSION
20#undef AUTOFS_MIN_PROTO_VERSION
21#undef AUTOFS_MAX_PROTO_VERSION
22
Ian Kent5c0a32f2006-03-27 01:14:55 -080023#define AUTOFS_PROTO_VERSION 5
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#define AUTOFS_MIN_PROTO_VERSION 3
Ian Kent5c0a32f2006-03-27 01:14:55 -080025#define AUTOFS_MAX_PROTO_VERSION 5
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Ian Kent8d7b48e2008-10-15 22:02:54 -070027#define AUTOFS_PROTO_SUBVERSION 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29/* Mask for expire behaviour */
30#define AUTOFS_EXP_IMMEDIATE 1
31#define AUTOFS_EXP_LEAVES 2
32
Ian Kenta92daf62009-01-06 14:42:08 -080033#define AUTOFS_TYPE_ANY 0U
34#define AUTOFS_TYPE_INDIRECT 1U
35#define AUTOFS_TYPE_DIRECT 2U
36#define AUTOFS_TYPE_OFFSET 4U
37
38static inline void set_autofs_type_indirect(unsigned int *type)
39{
40 *type = AUTOFS_TYPE_INDIRECT;
41 return;
42}
43
44static inline unsigned int autofs_type_indirect(unsigned int type)
45{
46 return (type == AUTOFS_TYPE_INDIRECT);
47}
48
49static inline void set_autofs_type_direct(unsigned int *type)
50{
51 *type = AUTOFS_TYPE_DIRECT;
52 return;
53}
54
55static inline unsigned int autofs_type_direct(unsigned int type)
56{
57 return (type == AUTOFS_TYPE_DIRECT);
58}
59
60static inline void set_autofs_type_offset(unsigned int *type)
61{
62 *type = AUTOFS_TYPE_OFFSET;
63 return;
64}
65
66static inline unsigned int autofs_type_offset(unsigned int type)
67{
68 return (type == AUTOFS_TYPE_OFFSET);
69}
70
71static inline unsigned int autofs_type_trigger(unsigned int type)
72{
73 return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET);
74}
75
76/*
77 * This isn't really a type as we use it to say "no type set" to
78 * indicate we want to search for "any" mount in the
79 * autofs_dev_ioctl_ismountpoint() device ioctl function.
80 */
81static inline void set_autofs_type_any(unsigned int *type)
82{
83 *type = AUTOFS_TYPE_ANY;
84 return;
85}
86
87static inline unsigned int autofs_type_any(unsigned int type)
88{
89 return (type == AUTOFS_TYPE_ANY);
90}
Ian Kentbb979d72008-10-15 22:02:52 -070091
Ian Kent5c0a32f2006-03-27 01:14:55 -080092/* Daemon notification packet types */
93enum autofs_notify {
94 NFY_NONE,
95 NFY_MOUNT,
96 NFY_EXPIRE
97};
98
99/* Kernel protocol version 4 packet types */
100
101/* Expire entry (umount request) */
102#define autofs_ptype_expire_multi 2
103
104/* Kernel protocol version 5 packet types */
105
106/* Indirect mount missing and expire requests. */
107#define autofs_ptype_missing_indirect 3
108#define autofs_ptype_expire_indirect 4
109
110/* Direct mount missing and expire requests */
111#define autofs_ptype_missing_direct 5
112#define autofs_ptype_expire_direct 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114/* v4 multi expire (via pipe) */
115struct autofs_packet_expire_multi {
116 struct autofs_packet_hdr hdr;
117 autofs_wqt_t wait_queue_token;
118 int len;
119 char name[NAME_MAX+1];
120};
121
Ian Kente8514472007-02-20 13:58:09 -0800122union autofs_packet_union {
123 struct autofs_packet_hdr hdr;
124 struct autofs_packet_missing missing;
125 struct autofs_packet_expire expire;
126 struct autofs_packet_expire_multi expire_multi;
127};
128
Ian Kent5c0a32f2006-03-27 01:14:55 -0800129/* autofs v5 common packet struct */
130struct autofs_v5_packet {
131 struct autofs_packet_hdr hdr;
132 autofs_wqt_t wait_queue_token;
133 __u32 dev;
134 __u64 ino;
135 __u32 uid;
136 __u32 gid;
137 __u32 pid;
138 __u32 tgid;
139 __u32 len;
140 char name[NAME_MAX+1];
141};
142
143typedef struct autofs_v5_packet autofs_packet_missing_indirect_t;
144typedef struct autofs_v5_packet autofs_packet_expire_indirect_t;
145typedef struct autofs_v5_packet autofs_packet_missing_direct_t;
146typedef struct autofs_v5_packet autofs_packet_expire_direct_t;
147
Ian Kente8514472007-02-20 13:58:09 -0800148union autofs_v5_packet_union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 struct autofs_packet_hdr hdr;
Ian Kent5c0a32f2006-03-27 01:14:55 -0800150 struct autofs_v5_packet v5_packet;
Ian Kente8514472007-02-20 13:58:09 -0800151 autofs_packet_missing_indirect_t missing_indirect;
152 autofs_packet_expire_indirect_t expire_indirect;
153 autofs_packet_missing_direct_t missing_direct;
154 autofs_packet_expire_direct_t expire_direct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155};
156
157#define AUTOFS_IOC_EXPIRE_MULTI _IOW(0x93,0x66,int)
Ian Kent5c0a32f2006-03-27 01:14:55 -0800158#define AUTOFS_IOC_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI
159#define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#define AUTOFS_IOC_PROTOSUBVER _IOR(0x93,0x67,int)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#define AUTOFS_IOC_ASKUMOUNT _IOR(0x93,0x70,int)
162
163
164#endif /* _LINUX_AUTO_FS4_H */