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2520 | jermar | 1 | /* |
2 | * Copyright (c) 2007 Jakub Jermar |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup fs |
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30 | * @{ |
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31 | */ |
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32 | |||
33 | #ifndef VFS_VFS_H_ |
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34 | #define VFS_VFS_H_ |
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35 | |||
2523 | jermar | 36 | #include <ipc/ipc.h> |
2529 | jermar | 37 | #include <libadt/list.h> |
2523 | jermar | 38 | |
2535 | jermar | 39 | #define dprintf(...) printf(__VA_ARGS__) |
40 | |||
2523 | jermar | 41 | #define VFS_FIRST FIRST_USER_METHOD |
42 | |||
2526 | jermar | 43 | #define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST) |
44 | |||
2520 | jermar | 45 | typedef enum { |
2523 | jermar | 46 | VFS_REGISTER = VFS_FIRST, |
2520 | jermar | 47 | VFS_MOUNT, |
48 | VFS_UNMOUNT, |
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2527 | jermar | 49 | VFS_LOOKUP, |
2521 | jermar | 50 | VFS_OPEN, |
2523 | jermar | 51 | VFS_CREATE, |
52 | VFS_CLOSE, |
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53 | VFS_READ, |
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54 | VFS_WRITE, |
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55 | VFS_SEEK, |
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2521 | jermar | 56 | VFS_LAST, /* keep this the last member of the enum */ |
2520 | jermar | 57 | } vfs_request_t; |
58 | |||
2521 | jermar | 59 | |
60 | /** |
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61 | * An instance of this structure is associated with a particular FS operation. |
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62 | * It tells VFS if the FS supports the operation or maybe if a default one |
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63 | * should be used. |
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64 | */ |
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65 | typedef enum { |
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2523 | jermar | 66 | VFS_OP_NULL = 0, |
2521 | jermar | 67 | VFS_OP_DEFAULT, |
68 | VFS_OP_DEFINED |
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69 | } vfs_op_t; |
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70 | |||
71 | #define FS_NAME_MAXLEN 20 |
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72 | |||
73 | /** |
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74 | * A structure like this is passed to VFS by each individual FS upon its |
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75 | * registration. It assosiates a human-readable identifier with each |
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76 | * registered FS. More importantly, through this structure, the FS announces |
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77 | * what operations it supports. |
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78 | */ |
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79 | typedef struct { |
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2523 | jermar | 80 | /** Unique identifier of the fs. */ |
2526 | jermar | 81 | char name[FS_NAME_MAXLEN]; |
2523 | jermar | 82 | |
83 | /** Operations. */ |
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84 | vfs_op_t ops[VFS_LAST - VFS_FIRST]; |
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2521 | jermar | 85 | } vfs_info_t; |
86 | |||
2526 | jermar | 87 | typedef struct { |
88 | link_t fs_link; |
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89 | vfs_info_t vfs_info; |
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2527 | jermar | 90 | ipcarg_t phone; |
2526 | jermar | 91 | } fs_info_t; |
92 | |||
2535 | jermar | 93 | extern link_t fs_head; |
94 | |||
95 | extern void vfs_register(ipc_callid_t rid, ipc_call_t *request); |
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96 | |||
2520 | jermar | 97 | #endif |
98 | |||
99 | /** |
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100 | * @} |
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2523 | jermar | 101 | */ |