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  1. /*
  2.  * Copyright (c) 2009 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup fs
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file devfs.c
  35.  * @brief Devices file system.
  36.  *
  37.  * Every device registered to device mapper is represented as a file in this
  38.  * file system.
  39.  */
  40.  
  41. #include <stdio.h>
  42. #include <ipc/ipc.h>
  43. #include <ipc/services.h>
  44. #include <async.h>
  45. #include <errno.h>
  46. #include <libfs.h>
  47. #include "devfs.h"
  48. #include "devfs_ops.h"
  49.  
  50. #define NAME  "devfs"
  51.  
  52. static vfs_info_t devfs_vfs_info = {
  53.     .name = "devfs",
  54. };
  55.  
  56. fs_reg_t devfs_reg;
  57.  
  58. static void devfs_connection(ipc_callid_t iid, ipc_call_t *icall)
  59. {
  60.     if (iid)
  61.         ipc_answer_0(iid, EOK);
  62.    
  63.     while (true) {
  64.         ipc_call_t call;
  65.         ipc_callid_t callid = async_get_call(&call);
  66.        
  67.         switch  (IPC_GET_METHOD(call)) {
  68.         case IPC_M_PHONE_HUNGUP:
  69.             return;
  70.         case VFS_OUT_MOUNTED:
  71.             devfs_mounted(callid, &call);
  72.             break;
  73.         case VFS_OUT_MOUNT:
  74.             devfs_mount(callid, &call);
  75.             break;
  76.         case VFS_OUT_LOOKUP:
  77.             devfs_lookup(callid, &call);
  78.             break;
  79.         case VFS_OUT_OPEN_NODE:
  80.             devfs_open_node(callid, &call);
  81.             break;
  82.         case VFS_OUT_DEVICE:
  83.             devfs_device(callid, &call);
  84.             break;
  85.         case VFS_OUT_READ:
  86.             devfs_read(callid, &call);
  87.             break;
  88.         case VFS_OUT_WRITE:
  89.             devfs_write(callid, &call);
  90.             break;
  91.         case VFS_OUT_TRUNCATE:
  92.             devfs_truncate(callid, &call);
  93.             break;
  94.         case VFS_OUT_CLOSE:
  95.             devfs_close(callid, &call);
  96.             break;
  97.         case VFS_OUT_SYNC:
  98.             devfs_sync(callid, &call);
  99.             break;
  100.         case VFS_OUT_DESTROY:
  101.             devfs_destroy(callid, &call);
  102.             break;
  103.         default:
  104.             ipc_answer_0(callid, ENOTSUP);
  105.             break;
  106.         }
  107.     }
  108. }
  109.  
  110. int main(int argc, char *argv[])
  111. {
  112.     printf(NAME ": HelenOS Device Filesystem\n");
  113.    
  114.     if (!devfs_init()) {
  115.         printf(NAME ": failed to initialize devfs\n");
  116.         return -1;
  117.     }
  118.    
  119.     int vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
  120.     if (vfs_phone < EOK) {
  121.         printf(NAME ": Unable to connect to VFS\n");
  122.         return -1;
  123.     }
  124.    
  125.     int rc = fs_register(vfs_phone, &devfs_reg, &devfs_vfs_info,
  126.         devfs_connection);
  127.     if (rc != EOK) {
  128.         printf(NAME ": Failed to register file system (%d)\n", rc);
  129.         return rc;
  130.     }
  131.    
  132.     printf(NAME ": Accepting connections\n");
  133.     async_manager();
  134.    
  135.     /* Not reached */
  136.     return 0;
  137. }
  138.  
  139. /**
  140.  * @}
  141.  */
  142.