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1/*
2 * Copyright 2008 Red Hat, Inc. All rights reserved.
3 * Copyright 2008 Ian Kent <raven@themaw.net>
4 *
5 * This file is part of the Linux kernel and is made available under
6 * the terms of the GNU General Public License, version 2, or at your
7 * option, any later version, incorporated herein by reference.
8 */
9
10#ifndef _LINUX_AUTO_DEV_IOCTL_H
11#define _LINUX_AUTO_DEV_IOCTL_H
12
13#include <linux/string.h>
14#include <linux/types.h>
15
16#define AUTOFS_DEVICE_NAME "autofs"
17
18#define AUTOFS_DEV_IOCTL_VERSION_MAJOR 1
19#define AUTOFS_DEV_IOCTL_VERSION_MINOR 0
20
21#define AUTOFS_DEVID_LEN 16
22
23#define AUTOFS_DEV_IOCTL_SIZE sizeof(struct autofs_dev_ioctl)
24
25/*
26 * An ioctl interface for autofs mount point control.
27 */
28
29struct args_protover {
30 __u32 version;
31};
32
33struct args_protosubver {
34 __u32 sub_version;
35};
36
37struct args_openmount {
38 __u32 devid;
39};
40
41struct args_ready {
42 __u32 token;
43};
44
45struct args_fail {
46 __u32 token;
47 __s32 status;
48};
49
50struct args_setpipefd {
51 __s32 pipefd;
52};
53
54struct args_timeout {
55 __u64 timeout;
56};
57
58struct args_requester {
59 __u32 uid;
60 __u32 gid;
61};
62
63struct args_expire {
64 __u32 how;
65};
66
67struct args_askumount {
68 __u32 may_umount;
69};
70
71struct args_ismountpoint {
72 union {
73 struct args_in {
74 __u32 type;
75 } in;
76 struct args_out {
77 __u32 devid;
78 __u32 magic;
79 } out;
80 };
81};
82
83/*
84 * All the ioctls use this structure.
85 * When sending a path size must account for the total length
86 * of the chunk of memory otherwise is is the size of the
87 * structure.
88 */
89
90struct autofs_dev_ioctl {
91 __u32 ver_major;
92 __u32 ver_minor;
93 __u32 size; /* total size of data passed in
94 * including this struct */
95 __s32 ioctlfd; /* automount command fd */
96
97 /* Command parameters */
98
99 union {
100 struct args_protover protover;
101 struct args_protosubver protosubver;
102 struct args_openmount openmount;
103 struct args_ready ready;
104 struct args_fail fail;
105 struct args_setpipefd setpipefd;
106 struct args_timeout timeout;
107 struct args_requester requester;
108 struct args_expire expire;
109 struct args_askumount askumount;
110 struct args_ismountpoint ismountpoint;
111 };
112
113 char path[0];
114};
115
116static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
117{
118 memset(in, 0, sizeof(struct autofs_dev_ioctl));
119 in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
120 in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
121 in->size = sizeof(struct autofs_dev_ioctl);
122 in->ioctlfd = -1;
123 return;
124}
125
126/*
127 * If you change this make sure you make the corresponding change
128 * to autofs-dev-ioctl.c:lookup_ioctl()
129 */
130enum {
131 /* Get various version info */
132 AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
133 AUTOFS_DEV_IOCTL_PROTOVER_CMD,
134 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
135
136 /* Open mount ioctl fd */
137 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
138
139 /* Close mount ioctl fd */
140 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
141
142 /* Mount/expire status returns */
143 AUTOFS_DEV_IOCTL_READY_CMD,
144 AUTOFS_DEV_IOCTL_FAIL_CMD,
145
146 /* Activate/deactivate autofs mount */
147 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
148 AUTOFS_DEV_IOCTL_CATATONIC_CMD,
149
150 /* Expiry timeout */
151 AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
152
153 /* Get mount last requesting uid and gid */
154 AUTOFS_DEV_IOCTL_REQUESTER_CMD,
155
156 /* Check for eligible expire candidates */
157 AUTOFS_DEV_IOCTL_EXPIRE_CMD,
158
159 /* Request busy status */
160 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
161
162 /* Check if path is a mountpoint */
163 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
164};
165
166#define AUTOFS_IOCTL 0x93
167
168#define AUTOFS_DEV_IOCTL_VERSION \
169 _IOWR(AUTOFS_IOCTL, \
170 AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
171
172#define AUTOFS_DEV_IOCTL_PROTOVER \
173 _IOWR(AUTOFS_IOCTL, \
174 AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
175
176#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
177 _IOWR(AUTOFS_IOCTL, \
178 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
179
180#define AUTOFS_DEV_IOCTL_OPENMOUNT \
181 _IOWR(AUTOFS_IOCTL, \
182 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
183
184#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
185 _IOWR(AUTOFS_IOCTL, \
186 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
187
188#define AUTOFS_DEV_IOCTL_READY \
189 _IOWR(AUTOFS_IOCTL, \
190 AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
191
192#define AUTOFS_DEV_IOCTL_FAIL \
193 _IOWR(AUTOFS_IOCTL, \
194 AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
195
196#define AUTOFS_DEV_IOCTL_SETPIPEFD \
197 _IOWR(AUTOFS_IOCTL, \
198 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
199
200#define AUTOFS_DEV_IOCTL_CATATONIC \
201 _IOWR(AUTOFS_IOCTL, \
202 AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
203
204#define AUTOFS_DEV_IOCTL_TIMEOUT \
205 _IOWR(AUTOFS_IOCTL, \
206 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
207
208#define AUTOFS_DEV_IOCTL_REQUESTER \
209 _IOWR(AUTOFS_IOCTL, \
210 AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
211
212#define AUTOFS_DEV_IOCTL_EXPIRE \
213 _IOWR(AUTOFS_IOCTL, \
214 AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
215
216#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
217 _IOWR(AUTOFS_IOCTL, \
218 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
219
220#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
221 _IOWR(AUTOFS_IOCTL, \
222 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
223
224#endif /* _LINUX_AUTO_DEV_IOCTL_H */