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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/auto_fs.h>
14#include <linux/string.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}
124
125/*
126 * If you change this make sure you make the corresponding change
127 * to autofs-dev-ioctl.c:lookup_ioctl()
128 */
129enum {
130 /* Get various version info */
131 AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
132 AUTOFS_DEV_IOCTL_PROTOVER_CMD,
133 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
134
135 /* Open mount ioctl fd */
136 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
137
138 /* Close mount ioctl fd */
139 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
140
141 /* Mount/expire status returns */
142 AUTOFS_DEV_IOCTL_READY_CMD,
143 AUTOFS_DEV_IOCTL_FAIL_CMD,
144
145 /* Activate/deactivate autofs mount */
146 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
147 AUTOFS_DEV_IOCTL_CATATONIC_CMD,
148
149 /* Expiry timeout */
150 AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
151
152 /* Get mount last requesting uid and gid */
153 AUTOFS_DEV_IOCTL_REQUESTER_CMD,
154
155 /* Check for eligible expire candidates */
156 AUTOFS_DEV_IOCTL_EXPIRE_CMD,
157
158 /* Request busy status */
159 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
160
161 /* Check if path is a mountpoint */
162 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
163};
164
165#define AUTOFS_IOCTL 0x93
166
167#define AUTOFS_DEV_IOCTL_VERSION \
168 _IOWR(AUTOFS_IOCTL, \
169 AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
170
171#define AUTOFS_DEV_IOCTL_PROTOVER \
172 _IOWR(AUTOFS_IOCTL, \
173 AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
174
175#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
176 _IOWR(AUTOFS_IOCTL, \
177 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
178
179#define AUTOFS_DEV_IOCTL_OPENMOUNT \
180 _IOWR(AUTOFS_IOCTL, \
181 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
182
183#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
184 _IOWR(AUTOFS_IOCTL, \
185 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
186
187#define AUTOFS_DEV_IOCTL_READY \
188 _IOWR(AUTOFS_IOCTL, \
189 AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
190
191#define AUTOFS_DEV_IOCTL_FAIL \
192 _IOWR(AUTOFS_IOCTL, \
193 AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
194
195#define AUTOFS_DEV_IOCTL_SETPIPEFD \
196 _IOWR(AUTOFS_IOCTL, \
197 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
198
199#define AUTOFS_DEV_IOCTL_CATATONIC \
200 _IOWR(AUTOFS_IOCTL, \
201 AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
202
203#define AUTOFS_DEV_IOCTL_TIMEOUT \
204 _IOWR(AUTOFS_IOCTL, \
205 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
206
207#define AUTOFS_DEV_IOCTL_REQUESTER \
208 _IOWR(AUTOFS_IOCTL, \
209 AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
210
211#define AUTOFS_DEV_IOCTL_EXPIRE \
212 _IOWR(AUTOFS_IOCTL, \
213 AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
214
215#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
216 _IOWR(AUTOFS_IOCTL, \
217 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
218
219#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
220 _IOWR(AUTOFS_IOCTL, \
221 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
222
223#endif /* _LINUX_AUTO_DEV_IOCTL_H */