source: mainline/uspace/srv/vfs/vfs.c@ 3c11713

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 3c11713 was 7f5e070, checked in by Jakub Jermar <jakub@…>, 15 years ago

Add dummy implementation of VFS_IN_UNMOUNT.
  • Property mode set to 100644
File size: 4.8 KB
Line 
1/*
2 * Copyright (c) 2008 Jakub Jermar
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 vfs.c
35 * @brief VFS service for HelenOS.
36 */
37
38#include <ipc/ipc.h>
39#include <ipc/services.h>
40#include <async.h>
41#include <errno.h>
42#include <stdio.h>
43#include <bool.h>
44#include <string.h>
45#include <as.h>
46#include <atomic.h>
47#include "vfs.h"
48
49#define NAME "vfs"
50
51static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
52{
53 bool keep_on_going = true;
54
55 /*
56 * The connection was opened via the IPC_CONNECT_ME_TO call.
57 * This call needs to be answered.
58 */
59 ipc_answer_0(iid, EOK);
60
61 /*
62 * Here we enter the main connection fibril loop.
63 * The logic behind this loop and the protocol is that we'd like to keep
64 * each connection open until the client hangs up. When the client hangs
65 * up, we will free its VFS state. The act of hanging up the connection
66 * by the client is equivalent to client termination because we cannot
67 * distinguish one from the other. On the other hand, the client can
68 * hang up arbitrarily if it has no open files and reestablish the
69 * connection later.
70 */
71 while (keep_on_going) {
72 ipc_call_t call;
73 ipc_callid_t callid = async_get_call(&call);
74
75 fs_handle_t fs_handle;
76 int phone;
77
78 switch (IPC_GET_METHOD(call)) {
79 case IPC_M_PHONE_HUNGUP:
80 keep_on_going = false;
81 break;
82 case VFS_IN_REGISTER:
83 vfs_register(callid, &call);
84 keep_on_going = false;
85 break;
86 case VFS_IN_MOUNT:
87 vfs_mount(callid, &call);
88 break;
89 case VFS_IN_UNMOUNT:
90 vfs_unmount(callid, &call);
91 break;
92 case VFS_IN_OPEN:
93 vfs_open(callid, &call);
94 break;
95 case VFS_IN_OPEN_NODE:
96 vfs_open_node(callid, &call);
97 break;
98 case VFS_IN_CLOSE:
99 vfs_close(callid, &call);
100 break;
101 case VFS_IN_READ:
102 vfs_read(callid, &call);
103 break;
104 case VFS_IN_WRITE:
105 vfs_write(callid, &call);
106 break;
107 case VFS_IN_SEEK:
108 vfs_seek(callid, &call);
109 break;
110 case VFS_IN_TRUNCATE:
111 vfs_truncate(callid, &call);
112 break;
113 case VFS_IN_FSTAT:
114 vfs_fstat(callid, &call);
115 break;
116 case VFS_IN_STAT:
117 vfs_stat(callid, &call);
118 break;
119 case VFS_IN_MKDIR:
120 vfs_mkdir(callid, &call);
121 break;
122 case VFS_IN_UNLINK:
123 vfs_unlink(callid, &call);
124 break;
125 case VFS_IN_RENAME:
126 vfs_rename(callid, &call);
127 break;
128 case VFS_IN_SYNC:
129 vfs_sync(callid, &call);
130 break;
131 case VFS_IN_DUP:
132 vfs_dup(callid, &call);
133 default:
134 ipc_answer_0(callid, ENOTSUP);
135 break;
136 }
137 }
138
139 /* TODO: cleanup after the client */
140}
141
142int main(int argc, char **argv)
143{
144 printf(NAME ": HelenOS VFS server\n");
145
146 /*
147 * Initialize VFS node hash table.
148 */
149 if (!vfs_nodes_init()) {
150 printf(NAME ": Failed to initialize VFS node hash table\n");
151 return ENOMEM;
152 }
153
154 /*
155 * Allocate and initialize the Path Lookup Buffer.
156 */
157 plb = as_get_mappable_page(PLB_SIZE);
158 if (!plb) {
159 printf(NAME ": Cannot allocate a mappable piece of address space\n");
160 return ENOMEM;
161 }
162
163 if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
164 AS_AREA_CACHEABLE) != plb) {
165 printf(NAME ": Cannot create address space area\n");
166 return ENOMEM;
167 }
168 memset(plb, 0, PLB_SIZE);
169
170 /*
171 * Set a connection handling function/fibril.
172 */
173 async_set_client_connection(vfs_connection);
174
175 /*
176 * Register at the naming service.
177 */
178 ipcarg_t phonead;
179 ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead);
180
181 /*
182 * Start accepting connections.
183 */
184 printf(NAME ": Accepting connections\n");
185 async_manager();
186 return 0;
187}
188
189/**
190 * @}
191 */
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