source: mainline/uspace/srv/vfs/vfs.c@ 519a97d

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 519a97d was 519a97d, checked in by Jakub Jermar <jakub@…>, 9 years ago

Add pager interface and create VFS pager port
  • Property mode set to 100644
File size: 5.3 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_pager(ipc_callid_t iid, ipc_call_t *icall, void *arg)
54{
55 async_answer_0(iid, ENOTSUP);
56}
57
58static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
59{
60 bool cont = true;
61
62 /*
63 * The connection was opened via the IPC_CONNECT_ME_TO call.
64 * This call needs to be answered.
65 */
66 async_answer_0(iid, EOK);
67
68 while (cont) {
69 ipc_call_t call;
70 ipc_callid_t callid = async_get_call(&call);
71
72 if (!IPC_GET_IMETHOD(call))
73 break;
74
75 switch (IPC_GET_IMETHOD(call)) {
76 case VFS_IN_REGISTER:
77 vfs_register(callid, &call);
78 cont = false;
79 break;
80 case VFS_IN_MOUNT:
81 vfs_mount_srv(callid, &call);
82 break;
83 case VFS_IN_UNMOUNT:
84 vfs_unmount_srv(callid, &call);
85 break;
86 case VFS_IN_OPEN:
87 vfs_open(callid, &call);
88 break;
89 case VFS_IN_CLOSE:
90 vfs_close(callid, &call);
91 break;
92 case VFS_IN_READ:
93 vfs_read(callid, &call);
94 break;
95 case VFS_IN_WRITE:
96 vfs_write(callid, &call);
97 break;
98 case VFS_IN_SEEK:
99 vfs_seek(callid, &call);
100 break;
101 case VFS_IN_TRUNCATE:
102 vfs_truncate(callid, &call);
103 break;
104 case VFS_IN_FSTAT:
105 vfs_fstat(callid, &call);
106 break;
107 case VFS_IN_STAT:
108 vfs_stat(callid, &call);
109 break;
110 case VFS_IN_MKDIR:
111 vfs_mkdir(callid, &call);
112 break;
113 case VFS_IN_UNLINK:
114 vfs_unlink(callid, &call);
115 break;
116 case VFS_IN_RENAME:
117 vfs_rename(callid, &call);
118 break;
119 case VFS_IN_SYNC:
120 vfs_sync(callid, &call);
121 break;
122 case VFS_IN_DUP:
123 vfs_dup(callid, &call);
124 break;
125 case VFS_IN_WAIT_HANDLE:
126 vfs_wait_handle(callid, &call);
127 break;
128 case VFS_IN_MTAB_GET:
129 vfs_get_mtab(callid, &call);
130 break;
131 case VFS_IN_STATFS:
132 vfs_statfs(callid, &call);
133 break;
134 default:
135 async_answer_0(callid, ENOTSUP);
136 break;
137 }
138 }
139
140 /*
141 * Open files for this client will be cleaned up when its last
142 * connection fibril terminates.
143 */
144}
145
146static void notification_handler(ipc_callid_t callid, ipc_call_t *call, void *arg)
147{
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}
154
155int main(int argc, char **argv)
156{
157 int rc;
158
159 printf("%s: HelenOS VFS server\n", NAME);
160
161 /*
162 * Initialize VFS node hash table.
163 */
164 if (!vfs_nodes_init()) {
165 printf("%s: Failed to initialize VFS node hash table\n",
166 NAME);
167 return ENOMEM;
168 }
169
170 /*
171 * Allocate and initialize the Path Lookup Buffer.
172 */
173 plb = as_area_create(AS_AREA_ANY, PLB_SIZE,
174 AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, AS_AREA_UNPAGED);
175 if (plb == AS_MAP_FAILED) {
176 printf("%s: Cannot create address space area\n", NAME);
177 return ENOMEM;
178 }
179 memset(plb, 0, PLB_SIZE);
180
181 /*
182 * Set client data constructor and destructor.
183 */
184 async_set_client_data_constructor(vfs_client_data_create);
185 async_set_client_data_destructor(vfs_client_data_destroy);
186
187 /*
188 * Create a port for the pager.
189 */
190 port_id_t port;
191 rc = async_create_port(INTERFACE_PAGER, vfs_pager, NULL, &port);
192 if (rc != EOK)
193 return rc;
194
195 /*
196 * Set a connection handling function/fibril.
197 */
198 async_set_fallback_port_handler(vfs_connection, NULL);
199
200 /*
201 * Subscribe to notifications.
202 */
203 async_event_task_subscribe(EVENT_TASK_STATE_CHANGE, notification_handler,
204 NULL);
205
206 /*
207 * Register at the naming service.
208 */
209 rc = service_register(SERVICE_VFS);
210 if (rc != EOK) {
211 printf("%s: Cannot register VFS service\n", NAME);
212 return rc;
213 }
214
215 /*
216 * Start accepting connections.
217 */
218 printf("%s: Accepting connections\n", NAME);
219 async_manager();
220 return 0;
221}
222
223/**
224 * @}
225 */
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