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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * Copyright 2008 Red Hat, Inc. All rights reserved.
4 * Copyright 2008 Ian Kent <raven@themaw.net>
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_DEV_IOCTL_H
12#define _LINUX_AUTO_DEV_IOCTL_H
13
14#include <linux/auto_fs.h>
15#include <linux/string.h>
16
17#define AUTOFS_DEVICE_NAME "autofs"
18
19#define AUTOFS_DEV_IOCTL_VERSION_MAJOR 1
20#define AUTOFS_DEV_IOCTL_VERSION_MINOR 1
21
22#define AUTOFS_DEV_IOCTL_SIZE sizeof(struct autofs_dev_ioctl)
23
24/*
25 * An ioctl interface for autofs mount point control.
26 */
27
28struct args_protover {
29 __u32 version;
30};
31
32struct args_protosubver {
33 __u32 sub_version;
34};
35
36struct args_openmount {
37 __u32 devid;
38};
39
40struct args_ready {
41 __u32 token;
42};
43
44struct args_fail {
45 __u32 token;
46 __s32 status;
47};
48
49struct args_setpipefd {
50 __s32 pipefd;
51};
52
53struct args_timeout {
54 __u64 timeout;
55};
56
57struct args_requester {
58 __u32 uid;
59 __u32 gid;
60};
61
62struct args_expire {
63 __u32 how;
64};
65
66struct args_askumount {
67 __u32 may_umount;
68};
69
70struct args_ismountpoint {
71 union {
72 struct args_in {
73 __u32 type;
74 } in;
75 struct args_out {
76 __u32 devid;
77 __u32 magic;
78 } out;
79 };
80};
81
82/*
83 * All the ioctls use this structure.
84 * When sending a path size must account for the total length
85 * of the chunk of memory otherwise it is the size of the
86 * structure.
87 */
88
89struct autofs_dev_ioctl {
90 __u32 ver_major;
91 __u32 ver_minor;
92 __u32 size; /* total size of data passed in
93 * including this struct */
94 __s32 ioctlfd; /* automount command fd */
95
96 /* Command parameters */
97
98 union {
99 struct args_protover protover;
100 struct args_protosubver protosubver;
101 struct args_openmount openmount;
102 struct args_ready ready;
103 struct args_fail fail;
104 struct args_setpipefd setpipefd;
105 struct args_timeout timeout;
106 struct args_requester requester;
107 struct args_expire expire;
108 struct args_askumount askumount;
109 struct args_ismountpoint ismountpoint;
110 };
111
112 char path[];
113};
114
115static __inline__ void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
116{
117 memset(in, 0, AUTOFS_DEV_IOCTL_SIZE);
118 in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
119 in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
120 in->size = AUTOFS_DEV_IOCTL_SIZE;
121 in->ioctlfd = -1;
122}
123
124enum {
125 /* Get various version info */
126 AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
127 AUTOFS_DEV_IOCTL_PROTOVER_CMD,
128 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
129
130 /* Open mount ioctl fd */
131 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
132
133 /* Close mount ioctl fd */
134 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
135
136 /* Mount/expire status returns */
137 AUTOFS_DEV_IOCTL_READY_CMD,
138 AUTOFS_DEV_IOCTL_FAIL_CMD,
139
140 /* Activate/deactivate autofs mount */
141 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
142 AUTOFS_DEV_IOCTL_CATATONIC_CMD,
143
144 /* Expiry timeout */
145 AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
146
147 /* Get mount last requesting uid and gid */
148 AUTOFS_DEV_IOCTL_REQUESTER_CMD,
149
150 /* Check for eligible expire candidates */
151 AUTOFS_DEV_IOCTL_EXPIRE_CMD,
152
153 /* Request busy status */
154 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
155
156 /* Check if path is a mountpoint */
157 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
158};
159
160#define AUTOFS_DEV_IOCTL_VERSION \
161 _IOWR(AUTOFS_IOCTL, \
162 AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
163
164#define AUTOFS_DEV_IOCTL_PROTOVER \
165 _IOWR(AUTOFS_IOCTL, \
166 AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
167
168#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
169 _IOWR(AUTOFS_IOCTL, \
170 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
171
172#define AUTOFS_DEV_IOCTL_OPENMOUNT \
173 _IOWR(AUTOFS_IOCTL, \
174 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
175
176#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
177 _IOWR(AUTOFS_IOCTL, \
178 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
179
180#define AUTOFS_DEV_IOCTL_READY \
181 _IOWR(AUTOFS_IOCTL, \
182 AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
183
184#define AUTOFS_DEV_IOCTL_FAIL \
185 _IOWR(AUTOFS_IOCTL, \
186 AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
187
188#define AUTOFS_DEV_IOCTL_SETPIPEFD \
189 _IOWR(AUTOFS_IOCTL, \
190 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
191
192#define AUTOFS_DEV_IOCTL_CATATONIC \
193 _IOWR(AUTOFS_IOCTL, \
194 AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
195
196#define AUTOFS_DEV_IOCTL_TIMEOUT \
197 _IOWR(AUTOFS_IOCTL, \
198 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
199
200#define AUTOFS_DEV_IOCTL_REQUESTER \
201 _IOWR(AUTOFS_IOCTL, \
202 AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
203
204#define AUTOFS_DEV_IOCTL_EXPIRE \
205 _IOWR(AUTOFS_IOCTL, \
206 AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
207
208#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
209 _IOWR(AUTOFS_IOCTL, \
210 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
211
212#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
213 _IOWR(AUTOFS_IOCTL, \
214 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
215
216#endif /* _LINUX_AUTO_DEV_IOCTL_H */