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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/types.h> |
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 | |
23 | #define AUTOFS_PROTO_VERSION 5 |
24 | #define AUTOFS_MIN_PROTO_VERSION 3 |
25 | #define AUTOFS_MAX_PROTO_VERSION 5 |
26 | |
27 | #define AUTOFS_PROTO_SUBVERSION 1 |
28 | |
29 | /* Mask for expire behaviour */ |
30 | #define AUTOFS_EXP_IMMEDIATE 1 |
31 | #define AUTOFS_EXP_LEAVES 2 |
32 | |
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 | } |
91 | |
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 |
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 | |
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 | |
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 | |
148 | union autofs_v5_packet_union { |
149 | struct autofs_packet_hdr hdr; |
150 | struct autofs_v5_packet v5_packet; |
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; |
155 | }; |
156 | |
157 | #define AUTOFS_IOC_EXPIRE_MULTI _IOW(0x93,0x66,int) |
158 | #define AUTOFS_IOC_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI |
159 | #define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI |
160 | #define AUTOFS_IOC_PROTOSUBVER _IOR(0x93,0x67,int) |
161 | #define AUTOFS_IOC_ASKUMOUNT _IOR(0x93,0x70,int) |
162 | |
163 | |
164 | #endif /* _LINUX_AUTO_FS4_H */ |
165 |
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