source: mainline/uspace/srv/vfs/vfs.c@ c8dc9ac

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c8dc9ac was c1f7a315, checked in by Jakub Jermar <jakub@…>, 9 years ago

Factor out handling of pager requests to vfs_pager.c
  • Property mode set to 100644
File size: 5.6 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 <stdlib.h>
40#include <ipc/services.h>
41#include <abi/ipc/methods.h>
42#include <libarch/config.h>
43#include <ns.h>
44#include <async.h>
45#include <errno.h>
46#include <stdio.h>
47#include <stdbool.h>
48#include <str.h>
49#include <as.h>
50#include <atomic.h>
51#include <macros.h>
52#include "vfs.h"
53
54#define NAME "vfs"
55
56static void vfs_pager(ipc_callid_t iid, ipc_call_t *icall, void *arg)
57{
58 async_answer_0(iid, EOK);
59
60 while (true) {
61 ipc_call_t call;
62 ipc_callid_t callid = async_get_call(&call);
63
64 if (!IPC_GET_IMETHOD(call))
65 break;
66
67 switch (IPC_GET_IMETHOD(call)) {
68 case IPC_M_PAGE_IN:
69 vfs_page_in(callid, &call);
70 break;
71 default:
72 async_answer_0(callid, ENOTSUP);
73 break;
74 }
75 }
76}
77
78static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
79{
80 bool cont = true;
81
82 /*
83 * The connection was opened via the IPC_CONNECT_ME_TO call.
84 * This call needs to be answered.
85 */
86 async_answer_0(iid, EOK);
87
88 while (cont) {
89 ipc_call_t call;
90 ipc_callid_t callid = async_get_call(&call);
91
92 if (!IPC_GET_IMETHOD(call))
93 break;
94
95 switch (IPC_GET_IMETHOD(call)) {
96 case VFS_IN_REGISTER:
97 vfs_register(callid, &call);
98 cont = false;
99 break;
100 case VFS_IN_MOUNT:
101 vfs_mount_srv(callid, &call);
102 break;
103 case VFS_IN_UNMOUNT:
104 vfs_unmount_srv(callid, &call);
105 break;
106 case VFS_IN_OPEN:
107 vfs_open(callid, &call);
108 break;
109 case VFS_IN_CLOSE:
110 vfs_close(callid, &call);
111 break;
112 case VFS_IN_READ:
113 vfs_read(callid, &call);
114 break;
115 case VFS_IN_WRITE:
116 vfs_write(callid, &call);
117 break;
118 case VFS_IN_SEEK:
119 vfs_seek(callid, &call);
120 break;
121 case VFS_IN_TRUNCATE:
122 vfs_truncate(callid, &call);
123 break;
124 case VFS_IN_FSTAT:
125 vfs_fstat(callid, &call);
126 break;
127 case VFS_IN_STAT:
128 vfs_stat(callid, &call);
129 break;
130 case VFS_IN_MKDIR:
131 vfs_mkdir(callid, &call);
132 break;
133 case VFS_IN_UNLINK:
134 vfs_unlink(callid, &call);
135 break;
136 case VFS_IN_RENAME:
137 vfs_rename(callid, &call);
138 break;
139 case VFS_IN_SYNC:
140 vfs_sync(callid, &call);
141 break;
142 case VFS_IN_DUP:
143 vfs_dup(callid, &call);
144 break;
145 case VFS_IN_WAIT_HANDLE:
146 vfs_wait_handle(callid, &call);
147 break;
148 case VFS_IN_MTAB_GET:
149 vfs_get_mtab(callid, &call);
150 break;
151 case VFS_IN_STATFS:
152 vfs_statfs(callid, &call);
153 break;
154 default:
155 async_answer_0(callid, ENOTSUP);
156 break;
157 }
158 }
159
160 /*
161 * Open files for this client will be cleaned up when its last
162 * connection fibril terminates.
163 */
164}
165
166static void notification_handler(ipc_callid_t callid, ipc_call_t *call, void *arg)
167{
168 if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
169 vfs_pass_handle(
170 (task_id_t) MERGE_LOUP32(IPC_GET_ARG4(*call),
171 IPC_GET_ARG5(*call)), call->in_task_id,
172 (int) IPC_GET_ARG2(*call));
173}
174
175int main(int argc, char **argv)
176{
177 int rc;
178
179 printf("%s: HelenOS VFS server\n", NAME);
180
181 /*
182 * Initialize VFS node hash table.
183 */
184 if (!vfs_nodes_init()) {
185 printf("%s: Failed to initialize VFS node hash table\n",
186 NAME);
187 return ENOMEM;
188 }
189
190 /*
191 * Allocate and initialize the Path Lookup Buffer.
192 */
193 plb = as_area_create(AS_AREA_ANY, PLB_SIZE,
194 AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, AS_AREA_UNPAGED);
195 if (plb == AS_MAP_FAILED) {
196 printf("%s: Cannot create address space area\n", NAME);
197 return ENOMEM;
198 }
199 memset(plb, 0, PLB_SIZE);
200
201 /*
202 * Set client data constructor and destructor.
203 */
204 async_set_client_data_constructor(vfs_client_data_create);
205 async_set_client_data_destructor(vfs_client_data_destroy);
206
207 /*
208 * Create a port for the pager.
209 */
210 port_id_t port;
211 rc = async_create_port(INTERFACE_PAGER, vfs_pager, NULL, &port);
212 if (rc != EOK)
213 return rc;
214
215 /*
216 * Set a connection handling function/fibril.
217 */
218 async_set_fallback_port_handler(vfs_connection, NULL);
219
220 /*
221 * Subscribe to notifications.
222 */
223 async_event_task_subscribe(EVENT_TASK_STATE_CHANGE, notification_handler,
224 NULL);
225
226 /*
227 * Register at the naming service.
228 */
229 rc = service_register(SERVICE_VFS);
230 if (rc != EOK) {
231 printf("%s: Cannot register VFS service\n", NAME);
232 return rc;
233 }
234
235 /*
236 * Start accepting connections.
237 */
238 printf("%s: Accepting connections\n", NAME);
239 async_manager();
240 return 0;
241}
242
243/**
244 * @}
245 */
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