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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Jakub Jermar |
2 | * Copyright (c) 2007 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup fs |
29 | /** @addtogroup fs |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | #ifndef VFS_VFS_H_ |
33 | #ifndef VFS_VFS_H_ |
34 | #define VFS_VFS_H_ |
34 | #define VFS_VFS_H_ |
35 | 35 | ||
36 | #include <ipc/ipc.h> |
36 | #include <ipc/ipc.h> |
- | 37 | #include <libadt/list.h> |
|
37 | 38 | ||
38 | #define VFS_FIRST FIRST_USER_METHOD |
39 | #define VFS_FIRST FIRST_USER_METHOD |
39 | 40 | ||
40 | #define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST) |
41 | #define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST) |
41 | 42 | ||
42 | typedef enum { |
43 | typedef enum { |
43 | VFS_REGISTER = VFS_FIRST, |
44 | VFS_REGISTER = VFS_FIRST, |
44 | VFS_MOUNT, |
45 | VFS_MOUNT, |
45 | VFS_UNMOUNT, |
46 | VFS_UNMOUNT, |
46 | VFS_LOOKUP, |
47 | VFS_LOOKUP, |
47 | VFS_OPEN, |
48 | VFS_OPEN, |
48 | VFS_CREATE, |
49 | VFS_CREATE, |
49 | VFS_CLOSE, |
50 | VFS_CLOSE, |
50 | VFS_READ, |
51 | VFS_READ, |
51 | VFS_WRITE, |
52 | VFS_WRITE, |
52 | VFS_SEEK, |
53 | VFS_SEEK, |
53 | VFS_LAST, /* keep this the last member of the enum */ |
54 | VFS_LAST, /* keep this the last member of the enum */ |
54 | } vfs_request_t; |
55 | } vfs_request_t; |
55 | 56 | ||
56 | 57 | ||
57 | /** |
58 | /** |
58 | * An instance of this structure is associated with a particular FS operation. |
59 | * An instance of this structure is associated with a particular FS operation. |
59 | * It tells VFS if the FS supports the operation or maybe if a default one |
60 | * It tells VFS if the FS supports the operation or maybe if a default one |
60 | * should be used. |
61 | * should be used. |
61 | */ |
62 | */ |
62 | typedef enum { |
63 | typedef enum { |
63 | VFS_OP_NULL = 0, |
64 | VFS_OP_NULL = 0, |
64 | VFS_OP_DEFAULT, |
65 | VFS_OP_DEFAULT, |
65 | VFS_OP_DEFINED |
66 | VFS_OP_DEFINED |
66 | } vfs_op_t; |
67 | } vfs_op_t; |
67 | 68 | ||
68 | #define FS_NAME_MAXLEN 20 |
69 | #define FS_NAME_MAXLEN 20 |
69 | 70 | ||
70 | /** |
71 | /** |
71 | * A structure like this is passed to VFS by each individual FS upon its |
72 | * A structure like this is passed to VFS by each individual FS upon its |
72 | * registration. It assosiates a human-readable identifier with each |
73 | * registration. It assosiates a human-readable identifier with each |
73 | * registered FS. More importantly, through this structure, the FS announces |
74 | * registered FS. More importantly, through this structure, the FS announces |
74 | * what operations it supports. |
75 | * what operations it supports. |
75 | */ |
76 | */ |
76 | typedef struct { |
77 | typedef struct { |
77 | /** Unique identifier of the fs. */ |
78 | /** Unique identifier of the fs. */ |
78 | char name[FS_NAME_MAXLEN]; |
79 | char name[FS_NAME_MAXLEN]; |
79 | 80 | ||
80 | /** Operations. */ |
81 | /** Operations. */ |
81 | vfs_op_t ops[VFS_LAST - VFS_FIRST]; |
82 | vfs_op_t ops[VFS_LAST - VFS_FIRST]; |
82 | } vfs_info_t; |
83 | } vfs_info_t; |
83 | 84 | ||
84 | typedef struct { |
85 | typedef struct { |
85 | link_t fs_link; |
86 | link_t fs_link; |
86 | vfs_info_t vfs_info; |
87 | vfs_info_t vfs_info; |
87 | ipcarg_t phone; |
88 | ipcarg_t phone; |
88 | } fs_info_t; |
89 | } fs_info_t; |
89 | 90 | ||
90 | #endif |
91 | #endif |
91 | 92 | ||
92 | /** |
93 | /** |
93 | * @} |
94 | * @} |
94 | */ |
95 | */ |
95 | 96 |