Subversion Repositories HelenOS

Rev

Rev 2529 | Rev 2532 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Martin Decky
  3.  * Copyright (c) 2007 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup fs
  31.  * @{
  32.  */
  33.  
  34. /**
  35.  * @file    fat.c
  36.  * @brief   FAT file system driver for HelenOS.
  37.  */
  38.  
  39. #include <ipc/ipc.h>
  40. #include <ipc/services.h>
  41. #include <async.h>
  42. #include <errno.h>
  43. #include <unistd.h>
  44. #include "../../vfs/vfs.h"
  45.  
  46. vfs_info_t fat_vfs_info = {
  47.     .name = "fat",
  48.     .ops = {
  49.         [IPC_METHOD_TO_VFS_OP(VFS_REGISTER)] = VFS_OP_DEFINED,
  50.         [IPC_METHOD_TO_VFS_OP(VFS_MOUNT)] = VFS_OP_DEFINED,
  51.         [IPC_METHOD_TO_VFS_OP(VFS_UNMOUNT)] = VFS_OP_DEFINED,
  52.         [IPC_METHOD_TO_VFS_OP(VFS_LOOKUP)] = VFS_OP_DEFINED,
  53.         [IPC_METHOD_TO_VFS_OP(VFS_OPEN)] = VFS_OP_DEFINED,
  54.         [IPC_METHOD_TO_VFS_OP(VFS_CREATE)] = VFS_OP_DEFINED,
  55.         [IPC_METHOD_TO_VFS_OP(VFS_CLOSE)] = VFS_OP_DEFINED,
  56.         [IPC_METHOD_TO_VFS_OP(VFS_READ)] = VFS_OP_DEFINED,
  57.         [IPC_METHOD_TO_VFS_OP(VFS_WRITE)] = VFS_OP_NULL,
  58.         [IPC_METHOD_TO_VFS_OP(VFS_SEEK)] = VFS_OP_DEFAULT
  59.     }
  60. };
  61.  
  62. /*
  63.  * This fibril processes request from the VFS server.
  64.  */
  65. void fat_connection(ipc_callid_t iid, ipc_call_t *icall)
  66. {
  67.     while (1) {
  68.         ipc_callid_t callid;
  69.         ipc_call_t call;
  70.    
  71.         callid = async_get_call(&call);
  72.         ipc_answer_fast(callid, ENOTSUP, 0, 0);
  73.     }
  74. }
  75.  
  76. int main(int argc, char **argv)
  77. {
  78.     ipcarg_t vfs_phone;
  79.  
  80.     vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0);
  81.     while (vfs_phone != EOK) {
  82.         usleep(10000);
  83.         vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0);
  84.     }
  85.    
  86.     /*
  87.      * Tell VFS that we are here and want to get registered.
  88.      * We use the async framework because VFS will answer the request
  89.      * out-of-order, when it knows that the operation succeeded or failed.
  90.      */
  91.     ipc_call_t answer;
  92.     aid_t req = async_send_2(vfs_phone, VFS_REGISTER, 0, 0, &answer);
  93.  
  94.     /*
  95.      * Send our VFS info structure to VFS.
  96.      */
  97.     int rc = ipc_data_send(vfs_phone, &fat_vfs_info, sizeof(fat_vfs_info));
  98.     if (rc != EOK) {
  99.         async_wait_for(req, NULL);
  100.         return rc;
  101.     }
  102.  
  103.     /*
  104.      * Ask VFS for callback connection.
  105.      */
  106.     ipcarg_t phonehash;
  107.     ipc_connect_to_me(vfs_phone, 0, 0, &phonehash);
  108.  
  109.     async_new_connection(phonehash, 0, NULL, fat_connection);
  110.     return 0;
  111. }
  112.  
  113. /**
  114.  * @}
  115.  */
  116.