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e2be04c7 | 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
e9a7c2f1 | 2 | /* |
ef8b42f7 IK |
3 | * Copyright 1997 Transmeta Corporation - All Rights Reserved |
4 | * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> | |
5 | * Copyright 2005-2006,2013,2017-2018 Ian Kent <raven@themaw.net> | |
607ca46e DH |
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 | ||
607ca46e DH |
13 | #ifndef _UAPI_LINUX_AUTO_FS_H |
14 | #define _UAPI_LINUX_AUTO_FS_H | |
15 | ||
16 | #include <linux/types.h> | |
f58b3c91 | 17 | #include <linux/limits.h> |
607ca46e DH |
18 | #ifndef __KERNEL__ |
19 | #include <sys/ioctl.h> | |
20 | #endif /* __KERNEL__ */ | |
21 | ||
ef8b42f7 IK |
22 | #define AUTOFS_PROTO_VERSION 5 |
23 | #define AUTOFS_MIN_PROTO_VERSION 3 | |
24 | #define AUTOFS_MAX_PROTO_VERSION 5 | |
607ca46e | 25 | |
60d6d04c | 26 | #define AUTOFS_PROTO_SUBVERSION 5 |
607ca46e DH |
27 | |
28 | /* | |
7cee9384 | 29 | * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed |
4f4ffc3a HD |
30 | * back to the kernel via ioctl from userspace. On architectures where 32- and |
31 | * 64-bit userspace binaries can be executed it's important that the size of | |
32 | * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we | |
33 | * do not break the binary ABI interface by changing the structure size. | |
607ca46e | 34 | */ |
4f4ffc3a | 35 | #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */ |
607ca46e | 36 | typedef unsigned long autofs_wqt_t; |
4f4ffc3a HD |
37 | #else |
38 | typedef unsigned int autofs_wqt_t; | |
607ca46e DH |
39 | #endif |
40 | ||
41 | /* Packet types */ | |
42 | #define autofs_ptype_missing 0 /* Missing entry (mount request) */ | |
43 | #define autofs_ptype_expire 1 /* Expire entry (umount request) */ | |
44 | ||
45 | struct autofs_packet_hdr { | |
46 | int proto_version; /* Protocol version */ | |
47 | int type; /* Type of packet */ | |
48 | }; | |
49 | ||
50 | struct autofs_packet_missing { | |
51 | struct autofs_packet_hdr hdr; | |
7cee9384 | 52 | autofs_wqt_t wait_queue_token; |
607ca46e DH |
53 | int len; |
54 | char name[NAME_MAX+1]; | |
55 | }; | |
56 | ||
57 | /* v3 expire (via ioctl) */ | |
58 | struct autofs_packet_expire { | |
59 | struct autofs_packet_hdr hdr; | |
60 | int len; | |
61 | char name[NAME_MAX+1]; | |
62 | }; | |
63 | ||
0fae77fe TK |
64 | #define AUTOFS_IOCTL 0x93 |
65 | ||
66 | enum { | |
67 | AUTOFS_IOC_READY_CMD = 0x60, | |
68 | AUTOFS_IOC_FAIL_CMD, | |
69 | AUTOFS_IOC_CATATONIC_CMD, | |
70 | AUTOFS_IOC_PROTOVER_CMD, | |
71 | AUTOFS_IOC_SETTIMEOUT_CMD, | |
72 | AUTOFS_IOC_EXPIRE_CMD, | |
73 | }; | |
74 | ||
75 | #define AUTOFS_IOC_READY _IO(AUTOFS_IOCTL, AUTOFS_IOC_READY_CMD) | |
76 | #define AUTOFS_IOC_FAIL _IO(AUTOFS_IOCTL, AUTOFS_IOC_FAIL_CMD) | |
77 | #define AUTOFS_IOC_CATATONIC _IO(AUTOFS_IOCTL, AUTOFS_IOC_CATATONIC_CMD) | |
ef8b42f7 IK |
78 | #define AUTOFS_IOC_PROTOVER _IOR(AUTOFS_IOCTL, \ |
79 | AUTOFS_IOC_PROTOVER_CMD, int) | |
80 | #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(AUTOFS_IOCTL, \ | |
81 | AUTOFS_IOC_SETTIMEOUT_CMD, \ | |
82 | compat_ulong_t) | |
83 | #define AUTOFS_IOC_SETTIMEOUT _IOWR(AUTOFS_IOCTL, \ | |
84 | AUTOFS_IOC_SETTIMEOUT_CMD, \ | |
85 | unsigned long) | |
86 | #define AUTOFS_IOC_EXPIRE _IOR(AUTOFS_IOCTL, \ | |
87 | AUTOFS_IOC_EXPIRE_CMD, \ | |
88 | struct autofs_packet_expire) | |
89 | ||
90 | /* autofs version 4 and later definitions */ | |
91 | ||
92 | /* Mask for expire behaviour */ | |
cbf6898f IK |
93 | #define AUTOFS_EXP_NORMAL 0x00 |
94 | #define AUTOFS_EXP_IMMEDIATE 0x01 | |
95 | #define AUTOFS_EXP_LEAVES 0x02 | |
96 | #define AUTOFS_EXP_FORCED 0x04 | |
ef8b42f7 IK |
97 | |
98 | #define AUTOFS_TYPE_ANY 0U | |
99 | #define AUTOFS_TYPE_INDIRECT 1U | |
100 | #define AUTOFS_TYPE_DIRECT 2U | |
101 | #define AUTOFS_TYPE_OFFSET 4U | |
102 | ||
103 | static inline void set_autofs_type_indirect(unsigned int *type) | |
104 | { | |
105 | *type = AUTOFS_TYPE_INDIRECT; | |
106 | } | |
107 | ||
108 | static inline unsigned int autofs_type_indirect(unsigned int type) | |
109 | { | |
110 | return (type == AUTOFS_TYPE_INDIRECT); | |
111 | } | |
112 | ||
113 | static inline void set_autofs_type_direct(unsigned int *type) | |
114 | { | |
115 | *type = AUTOFS_TYPE_DIRECT; | |
116 | } | |
117 | ||
118 | static inline unsigned int autofs_type_direct(unsigned int type) | |
119 | { | |
120 | return (type == AUTOFS_TYPE_DIRECT); | |
121 | } | |
122 | ||
123 | static inline void set_autofs_type_offset(unsigned int *type) | |
124 | { | |
125 | *type = AUTOFS_TYPE_OFFSET; | |
126 | } | |
127 | ||
128 | static inline unsigned int autofs_type_offset(unsigned int type) | |
129 | { | |
130 | return (type == AUTOFS_TYPE_OFFSET); | |
131 | } | |
132 | ||
133 | static inline unsigned int autofs_type_trigger(unsigned int type) | |
134 | { | |
135 | return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET); | |
136 | } | |
137 | ||
138 | /* | |
139 | * This isn't really a type as we use it to say "no type set" to | |
140 | * indicate we want to search for "any" mount in the | |
141 | * autofs_dev_ioctl_ismountpoint() device ioctl function. | |
142 | */ | |
143 | static inline void set_autofs_type_any(unsigned int *type) | |
144 | { | |
145 | *type = AUTOFS_TYPE_ANY; | |
146 | } | |
147 | ||
148 | static inline unsigned int autofs_type_any(unsigned int type) | |
149 | { | |
150 | return (type == AUTOFS_TYPE_ANY); | |
151 | } | |
152 | ||
153 | /* Daemon notification packet types */ | |
154 | enum autofs_notify { | |
155 | NFY_NONE, | |
156 | NFY_MOUNT, | |
157 | NFY_EXPIRE | |
158 | }; | |
159 | ||
160 | /* Kernel protocol version 4 packet types */ | |
161 | ||
162 | /* Expire entry (umount request) */ | |
163 | #define autofs_ptype_expire_multi 2 | |
164 | ||
165 | /* Kernel protocol version 5 packet types */ | |
166 | ||
167 | /* Indirect mount missing and expire requests. */ | |
168 | #define autofs_ptype_missing_indirect 3 | |
169 | #define autofs_ptype_expire_indirect 4 | |
170 | ||
171 | /* Direct mount missing and expire requests */ | |
172 | #define autofs_ptype_missing_direct 5 | |
173 | #define autofs_ptype_expire_direct 6 | |
174 | ||
175 | /* v4 multi expire (via pipe) */ | |
176 | struct autofs_packet_expire_multi { | |
177 | struct autofs_packet_hdr hdr; | |
178 | autofs_wqt_t wait_queue_token; | |
179 | int len; | |
180 | char name[NAME_MAX+1]; | |
181 | }; | |
182 | ||
183 | union autofs_packet_union { | |
184 | struct autofs_packet_hdr hdr; | |
185 | struct autofs_packet_missing missing; | |
186 | struct autofs_packet_expire expire; | |
187 | struct autofs_packet_expire_multi expire_multi; | |
188 | }; | |
189 | ||
190 | /* autofs v5 common packet struct */ | |
191 | struct autofs_v5_packet { | |
192 | struct autofs_packet_hdr hdr; | |
193 | autofs_wqt_t wait_queue_token; | |
194 | __u32 dev; | |
195 | __u64 ino; | |
196 | __u32 uid; | |
197 | __u32 gid; | |
198 | __u32 pid; | |
199 | __u32 tgid; | |
200 | __u32 len; | |
201 | char name[NAME_MAX+1]; | |
202 | }; | |
203 | ||
204 | typedef struct autofs_v5_packet autofs_packet_missing_indirect_t; | |
205 | typedef struct autofs_v5_packet autofs_packet_expire_indirect_t; | |
206 | typedef struct autofs_v5_packet autofs_packet_missing_direct_t; | |
207 | typedef struct autofs_v5_packet autofs_packet_expire_direct_t; | |
208 | ||
209 | union autofs_v5_packet_union { | |
210 | struct autofs_packet_hdr hdr; | |
211 | struct autofs_v5_packet v5_packet; | |
212 | autofs_packet_missing_indirect_t missing_indirect; | |
213 | autofs_packet_expire_indirect_t expire_indirect; | |
214 | autofs_packet_missing_direct_t missing_direct; | |
215 | autofs_packet_expire_direct_t expire_direct; | |
216 | }; | |
217 | ||
218 | enum { | |
219 | AUTOFS_IOC_EXPIRE_MULTI_CMD = 0x66, /* AUTOFS_IOC_EXPIRE_CMD + 1 */ | |
220 | AUTOFS_IOC_PROTOSUBVER_CMD, | |
221 | AUTOFS_IOC_ASKUMOUNT_CMD = 0x70, /* AUTOFS_DEV_IOCTL_VERSION_CMD - 1 */ | |
222 | }; | |
223 | ||
224 | #define AUTOFS_IOC_EXPIRE_MULTI _IOW(AUTOFS_IOCTL, \ | |
225 | AUTOFS_IOC_EXPIRE_MULTI_CMD, int) | |
226 | #define AUTOFS_IOC_PROTOSUBVER _IOR(AUTOFS_IOCTL, \ | |
227 | AUTOFS_IOC_PROTOSUBVER_CMD, int) | |
228 | #define AUTOFS_IOC_ASKUMOUNT _IOR(AUTOFS_IOCTL, \ | |
229 | AUTOFS_IOC_ASKUMOUNT_CMD, int) | |
607ca46e DH |
230 | |
231 | #endif /* _UAPI_LINUX_AUTO_FS_H */ |