source: mainline/uspace/srv/vfs/vfs.c@ e2ab36f1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since e2ab36f1 was e2ab36f1, checked in by Jakub Jermar <jakub@…>, 14 years ago

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