| 0,0 → 1,183 |
|---|
| /* |
| * 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" |
| |
| #define dprintf(...) printf(__VA_ARGS__) |
| |
| static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
| { |
| bool keep_on_going = 1; |
| |
| /* |
| * 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_callid_t callid; |
| ipc_call_t call; |
| |
| callid = async_get_call(&call); |
| |
| switch (IPC_GET_METHOD(call)) { |
| case IPC_M_PHONE_HUNGUP: |
| keep_on_going = false; |
| break; |
| case VFS_REGISTER: |
| vfs_register(callid, &call); |
| keep_on_going = false; |
| break; |
| case VFS_MOUNT: |
| vfs_mount(callid, &call); |
| break; |
| case VFS_OPEN: |
| vfs_open(callid, &call); |
| break; |
| case VFS_CLOSE: |
| vfs_close(callid, &call); |
| break; |
| case VFS_READ: |
| vfs_read(callid, &call); |
| break; |
| case VFS_WRITE: |
| vfs_write(callid, &call); |
| break; |
| case VFS_SEEK: |
| vfs_seek(callid, &call); |
| break; |
| case VFS_TRUNCATE: |
| vfs_truncate(callid, &call); |
| break; |
| case VFS_MKDIR: |
| vfs_mkdir(callid, &call); |
| break; |
| case VFS_UNLINK: |
| vfs_unlink(callid, &call); |
| break; |
| case VFS_RENAME: |
| vfs_rename(callid, &call); |
| break; |
| default: |
| ipc_answer_0(callid, ENOTSUP); |
| break; |
| } |
| } |
| |
| /* TODO: cleanup after the client */ |
| |
| } |
| |
| int main(int argc, char **argv) |
| { |
| ipcarg_t phonead; |
| |
| 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. |
| */ |
| async_set_client_connection(vfs_connection); |
| |
| /* |
| * Register at the naming service. |
| */ |
| ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead); |
| |
| /* |
| * Start accepting connections. |
| */ |
| printf(NAME ": Accepting connections\n"); |
| async_manager(); |
| return 0; |
| } |
| |
| /** |
| * @} |
| */ |