source: mainline/uspace/srv/vfs/vfs.c@ 124c061

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 124c061 was 124c061, checked in by Jakub Jermar <jakub@…>, 14 years ago

ipc_connect_to_me() now takes one extra argument to store the client task hash.
  • Property mode set to 100644
File size: 4.7 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/ipc.h>
39#include <ipc/services.h>
40#include <async.h>
41#include <errno.h>
42#include <stdio.h>
43#include <bool.h>
44#include <str.h>
45#include <as.h>
46#include <atomic.h>
47#include "vfs.h"
48
49#define NAME "vfs"
50
51static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
52{
53 bool keep_on_going = true;
54
55 /*
56 * The connection was opened via the IPC_CONNECT_ME_TO call.
57 * This call needs to be answered.
58 */
59 ipc_answer_0(iid, EOK);
60
61 /*
62 * Here we enter the main connection fibril loop.
63 * The logic behind this loop and the protocol is that we'd like to keep
64 * each connection open until the client hangs up. When the client hangs
65 * up, we will free its VFS state. The act of hanging up the connection
66 * by the client is equivalent to client termination because we cannot
67 * distinguish one from the other. On the other hand, the client can
68 * hang up arbitrarily if it has no open files and reestablish the
69 * connection later.
70 */
71 while (keep_on_going) {
72 ipc_call_t call;
73 ipc_callid_t callid = async_get_call(&call);
74
75 switch (IPC_GET_IMETHOD(call)) {
76 case IPC_M_PHONE_HUNGUP:
77 keep_on_going = false;
78 break;
79 case VFS_IN_REGISTER:
80 vfs_register(callid, &call);
81 keep_on_going = false;
82 break;
83 case VFS_IN_MOUNT:
84 vfs_mount(callid, &call);
85 break;
86 case VFS_IN_UNMOUNT:
87 vfs_unmount(callid, &call);
88 break;
89 case VFS_IN_OPEN:
90 vfs_open(callid, &call);
91 break;
92 case VFS_IN_OPEN_NODE:
93 vfs_open_node(callid, &call);
94 break;
95 case VFS_IN_CLOSE:
96 vfs_close(callid, &call);
97 break;
98 case VFS_IN_READ:
99 vfs_read(callid, &call);
100 break;
101 case VFS_IN_WRITE:
102 vfs_write(callid, &call);
103 break;
104 case VFS_IN_SEEK:
105 vfs_seek(callid, &call);
106 break;
107 case VFS_IN_TRUNCATE:
108 vfs_truncate(callid, &call);
109 break;
110 case VFS_IN_FSTAT:
111 vfs_fstat(callid, &call);
112 break;
113 case VFS_IN_STAT:
114 vfs_stat(callid, &call);
115 break;
116 case VFS_IN_MKDIR:
117 vfs_mkdir(callid, &call);
118 break;
119 case VFS_IN_UNLINK:
120 vfs_unlink(callid, &call);
121 break;
122 case VFS_IN_RENAME:
123 vfs_rename(callid, &call);
124 break;
125 case VFS_IN_SYNC:
126 vfs_sync(callid, &call);
127 break;
128 case VFS_IN_DUP:
129 vfs_dup(callid, &call);
130 default:
131 ipc_answer_0(callid, ENOTSUP);
132 break;
133 }
134 }
135
136 vfs_files_done();
137}
138
139int main(int argc, char **argv)
140{
141 printf(NAME ": HelenOS VFS server\n");
142
143 /*
144 * Initialize VFS node hash table.
145 */
146 if (!vfs_nodes_init()) {
147 printf(NAME ": Failed to initialize VFS node hash table\n");
148 return ENOMEM;
149 }
150
151 /*
152 * Allocate and initialize the Path Lookup Buffer.
153 */
154 plb = as_get_mappable_page(PLB_SIZE);
155 if (!plb) {
156 printf(NAME ": Cannot allocate a mappable piece of address space\n");
157 return ENOMEM;
158 }
159
160 if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
161 AS_AREA_CACHEABLE) != plb) {
162 printf(NAME ": Cannot create address space area\n");
163 return ENOMEM;
164 }
165 memset(plb, 0, PLB_SIZE);
166
167 /*
168 * Set a connection handling function/fibril.
169 */
170 async_set_client_connection(vfs_connection);
171
172 /*
173 * Register at the naming service.
174 */
175 ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, NULL, NULL);
176
177 /*
178 * Start accepting connections.
179 */
180 printf(NAME ": Accepting connections\n");
181 async_manager();
182 return 0;
183}
184
185/**
186 * @}
187 */
Note: See TracBrowser for help on using the repository browser.