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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 */ | |
15 | #include <linux/auto_fs.h> | |
16 | ||
17 | /* autofs v4 definitions */ | |
18 | #undef AUTOFS_PROTO_VERSION | |
19 | #undef AUTOFS_MIN_PROTO_VERSION | |
20 | #undef AUTOFS_MAX_PROTO_VERSION | |
21 | ||
5c0a32fc | 22 | #define AUTOFS_PROTO_VERSION 5 |
1da177e4 | 23 | #define AUTOFS_MIN_PROTO_VERSION 3 |
5c0a32fc | 24 | #define AUTOFS_MAX_PROTO_VERSION 5 |
1da177e4 | 25 | |
8d7b48e0 | 26 | #define AUTOFS_PROTO_SUBVERSION 1 |
1da177e4 LT |
27 | |
28 | /* Mask for expire behaviour */ | |
29 | #define AUTOFS_EXP_IMMEDIATE 1 | |
30 | #define AUTOFS_EXP_LEAVES 2 | |
31 | ||
a92daf6b IK |
32 | #define AUTOFS_TYPE_ANY 0U |
33 | #define AUTOFS_TYPE_INDIRECT 1U | |
34 | #define AUTOFS_TYPE_DIRECT 2U | |
35 | #define AUTOFS_TYPE_OFFSET 4U | |
36 | ||
37 | static inline void set_autofs_type_indirect(unsigned int *type) | |
38 | { | |
39 | *type = AUTOFS_TYPE_INDIRECT; | |
40 | return; | |
41 | } | |
42 | ||
43 | static inline unsigned int autofs_type_indirect(unsigned int type) | |
44 | { | |
45 | return (type == AUTOFS_TYPE_INDIRECT); | |
46 | } | |
47 | ||
48 | static inline void set_autofs_type_direct(unsigned int *type) | |
49 | { | |
50 | *type = AUTOFS_TYPE_DIRECT; | |
51 | return; | |
52 | } | |
53 | ||
54 | static inline unsigned int autofs_type_direct(unsigned int type) | |
55 | { | |
56 | return (type == AUTOFS_TYPE_DIRECT); | |
57 | } | |
58 | ||
59 | static inline void set_autofs_type_offset(unsigned int *type) | |
60 | { | |
61 | *type = AUTOFS_TYPE_OFFSET; | |
62 | return; | |
63 | } | |
64 | ||
65 | static inline unsigned int autofs_type_offset(unsigned int type) | |
66 | { | |
67 | return (type == AUTOFS_TYPE_OFFSET); | |
68 | } | |
69 | ||
70 | static inline unsigned int autofs_type_trigger(unsigned int type) | |
71 | { | |
72 | return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET); | |
73 | } | |
74 | ||
75 | /* | |
76 | * This isn't really a type as we use it to say "no type set" to | |
77 | * indicate we want to search for "any" mount in the | |
78 | * autofs_dev_ioctl_ismountpoint() device ioctl function. | |
79 | */ | |
80 | static inline void set_autofs_type_any(unsigned int *type) | |
81 | { | |
82 | *type = AUTOFS_TYPE_ANY; | |
83 | return; | |
84 | } | |
85 | ||
86 | static inline unsigned int autofs_type_any(unsigned int type) | |
87 | { | |
88 | return (type == AUTOFS_TYPE_ANY); | |
89 | } | |
bb979d7f | 90 | |
5c0a32fc IK |
91 | /* Daemon notification packet types */ |
92 | enum autofs_notify { | |
93 | NFY_NONE, | |
94 | NFY_MOUNT, | |
95 | NFY_EXPIRE | |
96 | }; | |
97 | ||
98 | /* Kernel protocol version 4 packet types */ | |
99 | ||
100 | /* Expire entry (umount request) */ | |
101 | #define autofs_ptype_expire_multi 2 | |
102 | ||
103 | /* Kernel protocol version 5 packet types */ | |
104 | ||
105 | /* Indirect mount missing and expire requests. */ | |
106 | #define autofs_ptype_missing_indirect 3 | |
107 | #define autofs_ptype_expire_indirect 4 | |
108 | ||
109 | /* Direct mount missing and expire requests */ | |
110 | #define autofs_ptype_missing_direct 5 | |
111 | #define autofs_ptype_expire_direct 6 | |
1da177e4 LT |
112 | |
113 | /* v4 multi expire (via pipe) */ | |
114 | struct autofs_packet_expire_multi { | |
115 | struct autofs_packet_hdr hdr; | |
116 | autofs_wqt_t wait_queue_token; | |
117 | int len; | |
118 | char name[NAME_MAX+1]; | |
119 | }; | |
120 | ||
e8514478 IK |
121 | union autofs_packet_union { |
122 | struct autofs_packet_hdr hdr; | |
123 | struct autofs_packet_missing missing; | |
124 | struct autofs_packet_expire expire; | |
125 | struct autofs_packet_expire_multi expire_multi; | |
126 | }; | |
127 | ||
5c0a32fc IK |
128 | /* autofs v5 common packet struct */ |
129 | struct autofs_v5_packet { | |
130 | struct autofs_packet_hdr hdr; | |
131 | autofs_wqt_t wait_queue_token; | |
132 | __u32 dev; | |
133 | __u64 ino; | |
134 | __u32 uid; | |
135 | __u32 gid; | |
136 | __u32 pid; | |
137 | __u32 tgid; | |
138 | __u32 len; | |
139 | char name[NAME_MAX+1]; | |
140 | }; | |
141 | ||
142 | typedef struct autofs_v5_packet autofs_packet_missing_indirect_t; | |
143 | typedef struct autofs_v5_packet autofs_packet_expire_indirect_t; | |
144 | typedef struct autofs_v5_packet autofs_packet_missing_direct_t; | |
145 | typedef struct autofs_v5_packet autofs_packet_expire_direct_t; | |
146 | ||
e8514478 | 147 | union autofs_v5_packet_union { |
1da177e4 | 148 | struct autofs_packet_hdr hdr; |
5c0a32fc | 149 | struct autofs_v5_packet v5_packet; |
e8514478 IK |
150 | autofs_packet_missing_indirect_t missing_indirect; |
151 | autofs_packet_expire_indirect_t expire_indirect; | |
152 | autofs_packet_missing_direct_t missing_direct; | |
153 | autofs_packet_expire_direct_t expire_direct; | |
1da177e4 LT |
154 | }; |
155 | ||
156 | #define AUTOFS_IOC_EXPIRE_MULTI _IOW(0x93,0x66,int) | |
5c0a32fc IK |
157 | #define AUTOFS_IOC_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI |
158 | #define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI | |
1da177e4 | 159 | #define AUTOFS_IOC_PROTOSUBVER _IOR(0x93,0x67,int) |
1da177e4 LT |
160 | #define AUTOFS_IOC_ASKUMOUNT _IOR(0x93,0x70,int) |
161 | ||
162 | ||
163 | #endif /* _LINUX_AUTO_FS4_H */ |