| 1 | /*
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| 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 |
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| 29 | /** @addtogroup fs
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| 30 | * @{
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| 31 | */
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| 32 |
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| 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 |
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| 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 <task.h>
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| 47 | #include <libfs.h>
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| 48 | #include "devfs.h"
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| 49 | #include "devfs_ops.h"
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| 50 |
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| 51 | #define NAME "devfs"
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| 52 |
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| 53 | static vfs_info_t devfs_vfs_info = {
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| 54 | .name = NAME,
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| 55 | .concurrent_read_write = false,
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| 56 | .write_retains_size = false,
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| 57 | };
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| 58 |
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| 59 | fs_reg_t devfs_reg;
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| 60 |
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| 61 | static void devfs_connection(ipc_callid_t iid, ipc_call_t *icall)
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| 62 | {
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| 63 | if (iid)
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| 64 | ipc_answer_0(iid, EOK);
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| 65 |
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| 66 | while (true) {
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| 67 | ipc_call_t call;
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| 68 | ipc_callid_t callid = async_get_call(&call);
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| 69 |
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| 70 | switch (IPC_GET_IMETHOD(call)) {
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| 71 | case IPC_M_PHONE_HUNGUP:
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| 72 | return;
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| 73 | case VFS_OUT_MOUNTED:
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| 74 | devfs_mounted(callid, &call);
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| 75 | break;
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| 76 | case VFS_OUT_MOUNT:
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| 77 | devfs_mount(callid, &call);
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| 78 | break;
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| 79 | case VFS_OUT_UNMOUNTED:
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| 80 | devfs_unmounted(callid, &call);
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| 81 | break;
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| 82 | case VFS_OUT_UNMOUNT:
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| 83 | devfs_unmount(callid, &call);
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| 84 | break;
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| 85 | case VFS_OUT_LOOKUP:
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| 86 | devfs_lookup(callid, &call);
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| 87 | break;
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| 88 | case VFS_OUT_OPEN_NODE:
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| 89 | devfs_open_node(callid, &call);
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| 90 | break;
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| 91 | case VFS_OUT_STAT:
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| 92 | devfs_stat(callid, &call);
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| 93 | break;
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| 94 | case VFS_OUT_READ:
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| 95 | devfs_read(callid, &call);
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| 96 | break;
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| 97 | case VFS_OUT_WRITE:
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| 98 | devfs_write(callid, &call);
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| 99 | break;
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| 100 | case VFS_OUT_TRUNCATE:
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| 101 | devfs_truncate(callid, &call);
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| 102 | break;
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| 103 | case VFS_OUT_CLOSE:
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| 104 | devfs_close(callid, &call);
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| 105 | break;
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| 106 | case VFS_OUT_SYNC:
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| 107 | devfs_sync(callid, &call);
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| 108 | break;
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| 109 | case VFS_OUT_DESTROY:
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| 110 | devfs_destroy(callid, &call);
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| 111 | break;
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| 112 | default:
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| 113 | ipc_answer_0(callid, ENOTSUP);
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| 114 | break;
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| 115 | }
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | int main(int argc, char *argv[])
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| 120 | {
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| 121 | printf(NAME ": HelenOS Device Filesystem\n");
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| 122 |
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| 123 | if (!devfs_init()) {
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| 124 | printf(NAME ": failed to initialize devfs\n");
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| 125 | return -1;
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| 126 | }
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| 127 |
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| 128 | int vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
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| 129 | if (vfs_phone < EOK) {
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| 130 | printf(NAME ": Unable to connect to VFS\n");
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| 131 | return -1;
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| 132 | }
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| 133 |
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| 134 | int rc = fs_register(vfs_phone, &devfs_reg, &devfs_vfs_info,
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| 135 | devfs_connection);
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| 136 | if (rc != EOK) {
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| 137 | printf(NAME ": Failed to register file system (%d)\n", rc);
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| 138 | return rc;
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| 139 | }
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| 140 |
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| 141 | printf(NAME ": Accepting connections\n");
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| 142 | task_retval(0);
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| 143 | async_manager();
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| 144 |
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| 145 | /* Not reached */
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| 146 | return 0;
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| 147 | }
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| 148 |
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| 149 | /**
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| 150 | * @}
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| 151 | */
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