WebSVN – HelenOS – Diff – /branches/tracing/uspace/srv/vfs/vfs.c

 /*
  * Copyright (c) 2008 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup fs
  * @{
  */
 /**
  * @file vfs.c
  * @brief VFS service for HelenOS.
  */
 #include <ipc/ipc.h>
 #include <ipc/services.h>
 #include <async.h>
 #include <errno.h>
 #include <stdio.h>
 #include <bool.h>
 #include <string.h>
 #include <as.h>
-#include <libadt/list.h>
 #include <atomic.h>
 #include "vfs.h"
 #define NAME "vfs"
 static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
     bool keep_on_going = true;
     /*
      * The connection was opened via the IPC_CONNECT_ME_TO call.
      * This call needs to be answered.
      */
     ipc_answer_0(iid, EOK);
     /*
      * Here we enter the main connection fibril loop.
      * The logic behind this loop and the protocol is that we'd like to keep
      * each connection open until the client hangs up. When the client hangs
      * up, we will free its VFS state. The act of hanging up the connection
      * by the client is equivalent to client termination because we cannot
      * distinguish one from the other. On the other hand, the client can
      * hang up arbitrarily if it has no open files and reestablish the
      * connection later.
      */
     while (keep_on_going) {
         ipc_call_t call;
         ipc_callid_t callid = async_get_call(&call);
         fs_handle_t fs_handle;
         int phone;
         switch (IPC_GET_METHOD(call)) {
         case IPC_M_PHONE_HUNGUP:
             keep_on_going = false;
             break;
-        case IPC_M_CONNECT_ME_TO:
-            /*
-             * Connect the client file system to another one.
-             */
-            /* FIXME:
-             * Prevent ordinary clients from connecting to file
-             * system servers directly. This should be solved by
-             * applying some security mechanisms.
-             */
-            fs_handle = IPC_GET_ARG1(call);
-            phone = vfs_grab_phone(fs_handle);
-            (void) ipc_forward_fast(callid, phone, 0, 0, 0,
-                IPC_FF_NONE);
-            vfs_release_phone(phone);
-            break;
-        case VFS_REGISTER:
+        case VFS_IN_REGISTER:
             vfs_register(callid, &call);
-            /*
-             * Keep the connection open so that a file system can
+            keep_on_going = false;
-             * later ask us to connect it to another file system.
-             * This is necessary to support non-root mounts.
-             */
             break;
-        case VFS_MOUNT:
+        case VFS_IN_MOUNT:
             vfs_mount(callid, &call);
             break;
-        case VFS_OPEN:
+        case VFS_IN_OPEN:
             vfs_open(callid, &call);
             break;
+        case VFS_IN_OPEN_NODE:
+            vfs_open_node(callid, &call);
+            break;
-        case VFS_CLOSE:
+        case VFS_IN_CLOSE:
             vfs_close(callid, &call);
             break;
-        case VFS_READ:
+        case VFS_IN_READ:
             vfs_read(callid, &call);
             break;
-        case VFS_WRITE:
+        case VFS_IN_WRITE:
             vfs_write(callid, &call);
             break;
-        case VFS_SEEK:
+        case VFS_IN_SEEK:
             vfs_seek(callid, &call);
             break;
-        case VFS_TRUNCATE:
+        case VFS_IN_TRUNCATE:
             vfs_truncate(callid, &call);
             break;
+        case VFS_IN_FSTAT:
+            vfs_fstat(callid, &call);
+            break;
+        case VFS_IN_STAT:
+            vfs_stat(callid, &call);
+            break;
-        case VFS_MKDIR:
+        case VFS_IN_MKDIR:
             vfs_mkdir(callid, &call);
             break;
-        case VFS_UNLINK:
+        case VFS_IN_UNLINK:
             vfs_unlink(callid, &call);
             break;
-        case VFS_RENAME:
+        case VFS_IN_RENAME:
             vfs_rename(callid, &call);
             break;
+        case VFS_IN_SYNC:
+            vfs_sync(callid, &call);
+            break;
         default:
             ipc_answer_0(callid, ENOTSUP);
             break;
+        }
+    }
     /* TODO: cleanup after the client */
+}
 int main(int argc, char **argv)
+{
     printf(NAME ": HelenOS VFS server\n");
     /*
-     * Initialize the list of registered file systems.
-     */
-    list_initialize(&fs_head);
-    /*
      * Initialize VFS node hash table.
      */
     if (!vfs_nodes_init()) {
         printf(NAME ": Failed to initialize VFS node hash table\n");
         return ENOMEM;
+    }
     /*
      * Allocate and initialize the Path Lookup Buffer.
      */
-    list_initialize(&plb_head);
     plb = as_get_mappable_page(PLB_SIZE);
     if (!plb) {
         printf(NAME ": Cannot allocate a mappable piece of address space\n");
         return ENOMEM;
+    }
     if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
         AS_AREA_CACHEABLE) != plb) {
         printf(NAME ": Cannot create address space area\n");
         return ENOMEM;
+    }
     memset(plb, 0, PLB_SIZE);
     /*
-     * Set a connectio handling function/fibril.
+     * Set a connection handling function/fibril.
      */
     async_set_client_connection(vfs_connection);
     /*
      * Register at the naming service.
      */
     ipcarg_t phonead;
     ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead);
     /*
      * Start accepting connections.
      */
     printf(NAME ": Accepting connections\n");
     async_manager();
     return 0;
+}
 /**
  * @}
  */

Subversion Repositories HelenOS

(root)/branches/tracing/uspace/srv/vfs/vfs.c – Rev 4377 → 4692