source: mainline/uspace/srv/vfs/vfs.c@ 76a67ce

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 76a67ce was 76a67ce, checked in by Maurizio Lombardi <m.lombardi85@…>, 14 years ago

vfs_get_mtab:

  • Remove mtab entry when unmounting a filesystem
  • Add vfs_get_mtab() implementation
  • 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 <bool.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_GET_MTAB:
130 vfs_get_mtab(callid, &call);
131 break;
132 default:
133 async_answer_0(callid, ENOTSUP);
134 break;
135 }
136 }
137
138 /*
139 * Open files for this client will be cleaned up when its last
140 * connection fibril terminates.
141 */
142}
143
144static void notification_received(ipc_callid_t callid, ipc_call_t *call)
145{
146 switch (IPC_GET_IMETHOD(*call)) {
147 case VFS_TASK_STATE_CHANGE:
148 if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
149 vfs_pass_handle(
150 (task_id_t) MERGE_LOUP32(IPC_GET_ARG4(*call),
151 IPC_GET_ARG5(*call)), call->in_task_id,
152 (int) IPC_GET_ARG2(*call));
153 break;
154 default:
155 break;
156 }
157}
158
159int main(int argc, char **argv)
160{
161 printf(NAME ": HelenOS VFS server\n");
162
163 /*
164 * Initialize VFS node hash table.
165 */
166 if (!vfs_nodes_init()) {
167 printf(NAME ": Failed to initialize VFS node hash table\n");
168 return ENOMEM;
169 }
170
171 /*
172 * Allocate and initialize the Path Lookup Buffer.
173 */
174 plb = as_get_mappable_page(PLB_SIZE);
175 if (!plb) {
176 printf(NAME ": Cannot allocate a mappable piece of address space\n");
177 return ENOMEM;
178 }
179
180 if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
181 AS_AREA_CACHEABLE) != plb) {
182 printf(NAME ": Cannot create address space area\n");
183 return ENOMEM;
184 }
185 memset(plb, 0, PLB_SIZE);
186
187 /*
188 * Set client data constructor and destructor.
189 */
190 async_set_client_data_constructor(vfs_client_data_create);
191 async_set_client_data_destructor(vfs_client_data_destroy);
192
193 /*
194 * Set a connection handling function/fibril.
195 */
196 async_set_client_connection(vfs_connection);
197
198 /*
199 * Set notification handler and subscribe to notifications.
200 */
201 async_set_interrupt_received(notification_received);
202 event_task_subscribe(EVENT_TASK_STATE_CHANGE, VFS_TASK_STATE_CHANGE);
203
204 /*
205 * Register at the naming service.
206 */
207 if (service_register(SERVICE_VFS) != EOK) {
208 printf("%s: Cannot register VFS service\n", NAME);
209 return EINVAL;
210 }
211
212 /*
213 * Start accepting connections.
214 */
215 printf(NAME ": Accepting connections\n");
216 async_manager();
217 return 0;
218}
219
220/**
221 * @}
222 */
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