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1da177e4 LT |
1 | /* -*- 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 */ | |
5d461bfe | 15 | #include <linux/types.h> |
1da177e4 LT |
16 | #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 | ||
5c0a32fc | 23 | #define AUTOFS_PROTO_VERSION 5 |
1da177e4 | 24 | #define AUTOFS_MIN_PROTO_VERSION 3 |
5c0a32fc | 25 | #define AUTOFS_MAX_PROTO_VERSION 5 |
1da177e4 | 26 | |
1972580b | 27 | #define AUTOFS_PROTO_SUBVERSION 2 |
1da177e4 LT |
28 | |
29 | /* Mask for expire behaviour */ | |
30 | #define AUTOFS_EXP_IMMEDIATE 1 | |
31 | #define AUTOFS_EXP_LEAVES 2 | |
32 | ||
a92daf6b IK |
33 | #define AUTOFS_TYPE_ANY 0U |
34 | #define AUTOFS_TYPE_INDIRECT 1U | |
35 | #define AUTOFS_TYPE_DIRECT 2U | |
36 | #define AUTOFS_TYPE_OFFSET 4U | |
37 | ||
38 | static inline void set_autofs_type_indirect(unsigned int *type) | |
39 | { | |
40 | *type = AUTOFS_TYPE_INDIRECT; | |
41 | return; | |
42 | } | |
43 | ||
44 | static inline unsigned int autofs_type_indirect(unsigned int type) | |
45 | { | |
46 | return (type == AUTOFS_TYPE_INDIRECT); | |
47 | } | |
48 | ||
49 | static inline void set_autofs_type_direct(unsigned int *type) | |
50 | { | |
51 | *type = AUTOFS_TYPE_DIRECT; | |
52 | return; | |
53 | } | |
54 | ||
55 | static inline unsigned int autofs_type_direct(unsigned int type) | |
56 | { | |
57 | return (type == AUTOFS_TYPE_DIRECT); | |
58 | } | |
59 | ||
60 | static inline void set_autofs_type_offset(unsigned int *type) | |
61 | { | |
62 | *type = AUTOFS_TYPE_OFFSET; | |
63 | return; | |
64 | } | |
65 | ||
66 | static inline unsigned int autofs_type_offset(unsigned int type) | |
67 | { | |
68 | return (type == AUTOFS_TYPE_OFFSET); | |
69 | } | |
70 | ||
71 | static 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 | */ | |
81 | static inline void set_autofs_type_any(unsigned int *type) | |
82 | { | |
83 | *type = AUTOFS_TYPE_ANY; | |
84 | return; | |
85 | } | |
86 | ||
87 | static inline unsigned int autofs_type_any(unsigned int type) | |
88 | { | |
89 | return (type == AUTOFS_TYPE_ANY); | |
90 | } | |
bb979d7f | 91 | |
5c0a32fc IK |
92 | /* Daemon notification packet types */ |
93 | enum 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 | |
1da177e4 LT |
113 | |
114 | /* v4 multi expire (via pipe) */ | |
115 | struct 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 | ||
e8514478 IK |
122 | union 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 | ||
5c0a32fc IK |
129 | /* autofs v5 common packet struct */ |
130 | struct 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 | ||
143 | typedef struct autofs_v5_packet autofs_packet_missing_indirect_t; | |
144 | typedef struct autofs_v5_packet autofs_packet_expire_indirect_t; | |
145 | typedef struct autofs_v5_packet autofs_packet_missing_direct_t; | |
146 | typedef struct autofs_v5_packet autofs_packet_expire_direct_t; | |
147 | ||
e8514478 | 148 | union autofs_v5_packet_union { |
1da177e4 | 149 | struct autofs_packet_hdr hdr; |
5c0a32fc | 150 | struct autofs_v5_packet v5_packet; |
e8514478 IK |
151 | 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; | |
1da177e4 LT |
155 | }; |
156 | ||
157 | #define AUTOFS_IOC_EXPIRE_MULTI _IOW(0x93,0x66,int) | |
5c0a32fc IK |
158 | #define AUTOFS_IOC_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI |
159 | #define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI | |
1da177e4 | 160 | #define AUTOFS_IOC_PROTOSUBVER _IOR(0x93,0x67,int) |
1da177e4 LT |
161 | #define AUTOFS_IOC_ASKUMOUNT _IOR(0x93,0x70,int) |
162 | ||
163 | ||
164 | #endif /* _LINUX_AUTO_FS4_H */ |