source: mainline/uspace/srv/vfs/vfs.c@ 2bc13887

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 2bc13887 was 2bc13887, checked in by Jakub Jermar <jakub@…>, 14 years ago

Add vfs_pass_handle().
  • Property mode set to 100644
File size: 5.1 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/services.h>
39#include <abi/ipc/event.h>
40#include <event.h>
41#include <ns.h>
42#include <async.h>
43#include <errno.h>
44#include <stdio.h>
45#include <bool.h>
46#include <str.h>
47#include <as.h>
48#include <atomic.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(callid, &call);
77 break;
78 case VFS_IN_UNMOUNT:
79 vfs_unmount(callid, &call);
80 break;
81 case VFS_IN_OPEN:
82 vfs_open(callid, &call);
83 break;
84 case VFS_IN_OPEN_NODE:
85 vfs_open_node(callid, &call);
86 break;
87 case VFS_IN_CLOSE:
88 vfs_close(callid, &call);
89 break;
90 case VFS_IN_READ:
91 vfs_read(callid, &call);
92 break;
93 case VFS_IN_WRITE:
94 vfs_write(callid, &call);
95 break;
96 case VFS_IN_SEEK:
97 vfs_seek(callid, &call);
98 break;
99 case VFS_IN_TRUNCATE:
100 vfs_truncate(callid, &call);
101 break;
102 case VFS_IN_FSTAT:
103 vfs_fstat(callid, &call);
104 break;
105 case VFS_IN_STAT:
106 vfs_stat(callid, &call);
107 break;
108 case VFS_IN_MKDIR:
109 vfs_mkdir(callid, &call);
110 break;
111 case VFS_IN_UNLINK:
112 vfs_unlink(callid, &call);
113 break;
114 case VFS_IN_RENAME:
115 vfs_rename(callid, &call);
116 break;
117 case VFS_IN_SYNC:
118 vfs_sync(callid, &call);
119 break;
120 case VFS_IN_DUP:
121 vfs_dup(callid, &call);
122 default:
123 async_answer_0(callid, ENOTSUP);
124 break;
125 }
126 }
127
128 /*
129 * Open files for this client will be cleaned up when its last
130 * connection fibril terminates.
131 */
132}
133
134enum {
135 VFS_TASK_STATE_CHANGE
136};
137
138static void notification_received(ipc_callid_t callid, ipc_call_t *call)
139{
140 switch (IPC_GET_IMETHOD(*call)) {
141 case VFS_TASK_STATE_CHANGE:
142 if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
143 vfs_pass_handle(IPC_GET_ARG4(*call),
144 IPC_GET_ARG5(*call), (int) IPC_GET_ARG2(*call));
145 break;
146 default:
147 break;
148 }
149}
150
151int main(int argc, char **argv)
152{
153 printf(NAME ": HelenOS VFS server\n");
154
155 /*
156 * Initialize VFS node hash table.
157 */
158 if (!vfs_nodes_init()) {
159 printf(NAME ": Failed to initialize VFS node hash table\n");
160 return ENOMEM;
161 }
162
163 /*
164 * Allocate and initialize the Path Lookup Buffer.
165 */
166 plb = as_get_mappable_page(PLB_SIZE);
167 if (!plb) {
168 printf(NAME ": Cannot allocate a mappable piece of address space\n");
169 return ENOMEM;
170 }
171
172 if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
173 AS_AREA_CACHEABLE) != plb) {
174 printf(NAME ": Cannot create address space area\n");
175 return ENOMEM;
176 }
177 memset(plb, 0, PLB_SIZE);
178
179 /*
180 * Set client data constructor and destructor.
181 */
182 async_set_client_data_constructor(vfs_client_data_create);
183 async_set_client_data_destructor(vfs_client_data_destroy);
184
185 /*
186 * Set a connection handling function/fibril.
187 */
188 async_set_client_connection(vfs_connection);
189
190 /*
191 * Set notification handler and subscribe to notifications.
192 */
193 async_set_interrupt_received(notification_received);
194 event_task_subscribe(EVENT_TASK_STATE_CHANGE, VFS_TASK_STATE_CHANGE);
195
196 /*
197 * Register at the naming service.
198 */
199 if (service_register(SERVICE_VFS) != EOK) {
200 printf("%s: Cannot register VFS service\n", NAME);
201 return EINVAL;
202 }
203
204 /*
205 * Start accepting connections.
206 */
207 printf(NAME ": Accepting connections\n");
208 async_manager();
209 return 0;
210}
211
212/**
213 * @}
214 */
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