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4417 | decky | 1 | /* |
2 | * Copyright (c) 2009 Martin Decky |
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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 | /** |
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34 | * @file devfs.c |
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35 | * @brief Devices file system. |
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36 | * |
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37 | * Every device registered to device mapper is represented as a file in this |
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38 | * file system. |
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39 | */ |
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40 | |||
41 | #include <stdio.h> |
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42 | #include <ipc/ipc.h> |
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43 | #include <ipc/services.h> |
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44 | #include <async.h> |
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45 | #include <errno.h> |
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46 | #include <libfs.h> |
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47 | #include "devfs.h" |
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48 | #include "devfs_ops.h" |
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49 | |||
50 | #define NAME "devfs" |
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51 | |||
52 | static vfs_info_t devfs_vfs_info = { |
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53 | .name = "devfs", |
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54 | }; |
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55 | |||
56 | fs_reg_t devfs_reg; |
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57 | |||
58 | static void devfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
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59 | { |
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60 | if (iid) |
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61 | ipc_answer_0(iid, EOK); |
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62 | |||
63 | while (true) { |
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64 | ipc_call_t call; |
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65 | ipc_callid_t callid = async_get_call(&call); |
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66 | |||
67 | switch (IPC_GET_METHOD(call)) { |
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68 | case VFS_MOUNTED: |
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69 | devfs_mounted(callid, &call); |
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70 | break; |
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71 | case VFS_MOUNT: |
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72 | devfs_mount(callid, &call); |
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73 | break; |
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74 | case VFS_LOOKUP: |
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75 | devfs_lookup(callid, &call); |
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76 | break; |
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77 | case VFS_READ: |
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78 | devfs_read(callid, &call); |
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79 | break; |
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80 | case VFS_WRITE: |
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81 | devfs_write(callid, &call); |
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82 | break; |
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83 | case VFS_TRUNCATE: |
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84 | devfs_truncate(callid, &call); |
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85 | break; |
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86 | case VFS_DESTROY: |
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87 | devfs_destroy(callid, &call); |
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88 | break; |
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89 | default: |
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90 | ipc_answer_0(callid, ENOTSUP); |
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91 | break; |
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92 | } |
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93 | } |
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94 | } |
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95 | |||
96 | int main(int argc, char *argv[]) |
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97 | { |
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98 | printf(NAME ": HelenOS Device Filesystem\n"); |
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99 | |||
100 | if (!devfs_init()) { |
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101 | printf(NAME ": failed to initialize devfs\n"); |
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102 | return -1; |
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103 | } |
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104 | |||
105 | int vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0); |
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106 | if (vfs_phone < EOK) { |
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107 | printf(NAME ": Unable to connect to VFS\n"); |
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108 | return -1; |
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109 | } |
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110 | |||
111 | int rc = fs_register(vfs_phone, &devfs_reg, &devfs_vfs_info, |
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112 | devfs_connection); |
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113 | if (rc != EOK) { |
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114 | printf(NAME ": Failed to register file system (%d)\n", rc); |
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115 | return rc; |
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116 | } |
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117 | |||
118 | printf(NAME ": Accepting connections\n"); |
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119 | async_manager(); |
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120 | |||
121 | /* Not reached */ |
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122 | return 0; |
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123 | } |
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124 | |||
125 | /** |
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126 | * @} |
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127 | */ |