source: mainline/uspace/srv/vfs/vfs.c@ 659ebd86

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 659ebd86 was 6afc9d7, checked in by Jiri Svoboda <jiri@…>, 10 years ago

UNIX-like I/O functions should use errno to return error code for many reasons.
  • Property mode set to 100644
File size: 5.0 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 <ns.h>
41#include <async.h>
42#include <errno.h>
43#include <stdio.h>
44#include <stdbool.h>
45#include <str.h>
46#include <as.h>
47#include <atomic.h>
48#include <macros.h>
49#include "vfs.h"
50
51#define NAME "vfs"
52
53static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
54{
55 bool cont = true;
56
57 /*
58 * The connection was opened via the IPC_CONNECT_ME_TO call.
59 * This call needs to be answered.
60 */
61 async_answer_0(iid, EOK);
62
63 while (cont) {
64 ipc_call_t call;
65 ipc_callid_t callid = async_get_call(&call);
66
67 if (!IPC_GET_IMETHOD(call))
68 break;
69
70 switch (IPC_GET_IMETHOD(call)) {
71 case VFS_IN_REGISTER:
72 vfs_register(callid, &call);
73 cont = false;
74 break;
75 case VFS_IN_MOUNT:
76 vfs_mount_srv(callid, &call);
77 break;
78 case VFS_IN_UNMOUNT:
79 vfs_unmount_srv(callid, &call);
80 break;
81 case VFS_IN_OPEN:
82 vfs_open(callid, &call);
83 break;
84 case VFS_IN_CLOSE:
85 vfs_close(callid, &call);
86 break;
87 case VFS_IN_READ:
88 vfs_read(callid, &call);
89 break;
90 case VFS_IN_WRITE:
91 vfs_write(callid, &call);
92 break;
93 case VFS_IN_SEEK:
94 vfs_seek(callid, &call);
95 break;
96 case VFS_IN_TRUNCATE:
97 vfs_truncate(callid, &call);
98 break;
99 case VFS_IN_FSTAT:
100 vfs_fstat(callid, &call);
101 break;
102 case VFS_IN_STAT:
103 vfs_stat(callid, &call);
104 break;
105 case VFS_IN_MKDIR:
106 vfs_mkdir(callid, &call);
107 break;
108 case VFS_IN_UNLINK:
109 vfs_unlink(callid, &call);
110 break;
111 case VFS_IN_RENAME:
112 vfs_rename(callid, &call);
113 break;
114 case VFS_IN_SYNC:
115 vfs_sync(callid, &call);
116 break;
117 case VFS_IN_DUP:
118 vfs_dup(callid, &call);
119 break;
120 case VFS_IN_WAIT_HANDLE:
121 vfs_wait_handle(callid, &call);
122 break;
123 case VFS_IN_MTAB_GET:
124 vfs_get_mtab(callid, &call);
125 break;
126 case VFS_IN_STATFS:
127 vfs_statfs(callid, &call);
128 break;
129 default:
130 async_answer_0(callid, ENOTSUP);
131 break;
132 }
133 }
134
135 /*
136 * Open files for this client will be cleaned up when its last
137 * connection fibril terminates.
138 */
139}
140
141static void notification_handler(ipc_callid_t callid, ipc_call_t *call, void *arg)
142{
143 if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
144 vfs_pass_handle(
145 (task_id_t) MERGE_LOUP32(IPC_GET_ARG4(*call),
146 IPC_GET_ARG5(*call)), call->in_task_id,
147 (int) IPC_GET_ARG2(*call));
148}
149
150int main(int argc, char **argv)
151{
152 printf("%s: HelenOS VFS server\n", NAME);
153
154 /*
155 * Initialize VFS node hash table.
156 */
157 if (!vfs_nodes_init()) {
158 printf("%s: Failed to initialize VFS node hash table\n",
159 NAME);
160 return ENOMEM;
161 }
162
163 /*
164 * Allocate and initialize the Path Lookup Buffer.
165 */
166 plb = as_area_create(AS_AREA_ANY, PLB_SIZE,
167 AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE);
168 if (plb == AS_MAP_FAILED) {
169 printf("%s: Cannot create address space area\n", NAME);
170 return ENOMEM;
171 }
172 memset(plb, 0, PLB_SIZE);
173
174 /*
175 * Set client data constructor and destructor.
176 */
177 async_set_client_data_constructor(vfs_client_data_create);
178 async_set_client_data_destructor(vfs_client_data_destroy);
179
180 /*
181 * Set a connection handling function/fibril.
182 */
183 async_set_fallback_port_handler(vfs_connection, NULL);
184
185 /*
186 * Subscribe to notifications.
187 */
188 async_event_task_subscribe(EVENT_TASK_STATE_CHANGE, notification_handler,
189 NULL);
190
191 /*
192 * Register at the naming service.
193 */
194 int rc = service_register(SERVICE_VFS);
195 if (rc != EOK) {
196 printf("%s: Cannot register VFS service\n", NAME);
197 return rc;
198 }
199
200 /*
201 * Start accepting connections.
202 */
203 printf("%s: Accepting connections\n", NAME);
204 async_manager();
205 return 0;
206}
207
208/**
209 * @}
210 */
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