source: mainline/uspace/srv/vfs/vfs.c@ 7af0cc5

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 7af0cc5 was 66366470, checked in by Manuele Conti <conti.ma@…>, 12 years ago

Start to implement df command line tool.
  • Property mode set to 100644
File size: 5.2 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 <vfs/vfs.h>
39#include <ipc/services.h>
40#include <abi/ipc/event.h>
41#include <event.h>
42#include <ns.h>
43#include <async.h>
44#include <errno.h>
45#include <stdio.h>
46#include <stdbool.h>
47#include <str.h>
48#include <as.h>
49#include <atomic.h>
50#include <macros.h>
51#include "vfs.h"
52
53#define NAME "vfs"
54
55enum {
56 VFS_TASK_STATE_CHANGE
57};
58
59static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
60{
61 bool cont = true;
62
63 /*
64 * The connection was opened via the IPC_CONNECT_ME_TO call.
65 * This call needs to be answered.
66 */
67 async_answer_0(iid, EOK);
68
69 while (cont) {
70 ipc_call_t call;
71 ipc_callid_t callid = async_get_call(&call);
72
73 if (!IPC_GET_IMETHOD(call))
74 break;
75
76 switch (IPC_GET_IMETHOD(call)) {
77 case VFS_IN_REGISTER:
78 vfs_register(callid, &call);
79 cont = false;
80 break;
81 case VFS_IN_MOUNT:
82 vfs_mount(callid, &call);
83 break;
84 case VFS_IN_UNMOUNT:
85 vfs_unmount(callid, &call);
86 break;
87 case VFS_IN_OPEN:
88 vfs_open(callid, &call);
89 break;
90 case VFS_IN_CLOSE:
91 vfs_close(callid, &call);
92 break;
93 case VFS_IN_READ:
94 vfs_read(callid, &call);
95 break;
96 case VFS_IN_WRITE:
97 vfs_write(callid, &call);
98 break;
99 case VFS_IN_SEEK:
100 vfs_seek(callid, &call);
101 break;
102 case VFS_IN_TRUNCATE:
103 vfs_truncate(callid, &call);
104 break;
105 case VFS_IN_FSTAT:
106 vfs_fstat(callid, &call);
107 break;
108 case VFS_IN_STAT:
109 vfs_stat(callid, &call);
110 break;
111 case VFS_IN_MKDIR:
112 vfs_mkdir(callid, &call);
113 break;
114 case VFS_IN_UNLINK:
115 vfs_unlink(callid, &call);
116 break;
117 case VFS_IN_RENAME:
118 vfs_rename(callid, &call);
119 break;
120 case VFS_IN_SYNC:
121 vfs_sync(callid, &call);
122 break;
123 case VFS_IN_DUP:
124 vfs_dup(callid, &call);
125 break;
126 case VFS_IN_WAIT_HANDLE:
127 vfs_wait_handle(callid, &call);
128 break;
129 case VFS_IN_MTAB_GET:
130 vfs_get_mtab(callid, &call);
131 break;
132 case VFS_IN_STATFS:
133 vfs_statfs(callid, &call);
134 break;
135 default:
136 async_answer_0(callid, ENOTSUP);
137 break;
138 }
139 }
140
141 /*
142 * Open files for this client will be cleaned up when its last
143 * connection fibril terminates.
144 */
145}
146
147static void notification_received(ipc_callid_t callid, ipc_call_t *call)
148{
149 switch (IPC_GET_IMETHOD(*call)) {
150 case VFS_TASK_STATE_CHANGE:
151 if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
152 vfs_pass_handle(
153 (task_id_t) MERGE_LOUP32(IPC_GET_ARG4(*call),
154 IPC_GET_ARG5(*call)), call->in_task_id,
155 (int) IPC_GET_ARG2(*call));
156 break;
157 default:
158 break;
159 }
160}
161
162int main(int argc, char **argv)
163{
164 printf("%s: HelenOS VFS server\n", NAME);
165
166 /*
167 * Initialize VFS node hash table.
168 */
169 if (!vfs_nodes_init()) {
170 printf("%s: Failed to initialize VFS node hash table\n",
171 NAME);
172 return ENOMEM;
173 }
174
175 /*
176 * Allocate and initialize the Path Lookup Buffer.
177 */
178 plb = as_area_create(AS_AREA_ANY, PLB_SIZE,
179 AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE);
180 if (plb == AS_MAP_FAILED) {
181 printf("%s: Cannot create address space area\n", NAME);
182 return ENOMEM;
183 }
184 memset(plb, 0, PLB_SIZE);
185
186 /*
187 * Set client data constructor and destructor.
188 */
189 async_set_client_data_constructor(vfs_client_data_create);
190 async_set_client_data_destructor(vfs_client_data_destroy);
191
192 /*
193 * Set a connection handling function/fibril.
194 */
195 async_set_client_connection(vfs_connection);
196
197 /*
198 * Set notification handler and subscribe to notifications.
199 */
200 async_set_interrupt_received(notification_received);
201 event_task_subscribe(EVENT_TASK_STATE_CHANGE, VFS_TASK_STATE_CHANGE);
202
203 /*
204 * Register at the naming service.
205 */
206 int rc = service_register(SERVICE_VFS);
207 if (rc != EOK) {
208 printf("%s: Cannot register VFS service\n", NAME);
209 return rc;
210 }
211
212 /*
213 * Start accepting connections.
214 */
215 printf("%s: Accepting connections\n", NAME);
216 async_manager();
217 return 0;
218}
219
220/**
221 * @}
222 */
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