source: mainline/uspace/srv/vfs/vfs.c@ dd2cfa7

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since dd2cfa7 was 852b801, checked in by Jakub Jermar <jakub@…>, 16 years ago

Introduce VFS_IN_FSTAT and VFS_OUT_STAT.
Provide libc fstat() and devfs_stat().
This functionality replaces VFS_IN_NODE
and VFS_IN/OUT_DEVICE. FAT and TMPFS
still do not implement this and VFS_IN_STAT
and stat() need implementation as well.
  • 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 <string.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 fs_handle_t fs_handle;
76 int phone;
77
78 switch (IPC_GET_METHOD(call)) {
79 case IPC_M_PHONE_HUNGUP:
80 keep_on_going = false;
81 break;
82 case VFS_IN_REGISTER:
83 vfs_register(callid, &call);
84 keep_on_going = false;
85 break;
86 case VFS_IN_MOUNT:
87 vfs_mount(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 default:
129 ipc_answer_0(callid, ENOTSUP);
130 break;
131 }
132 }
133
134 /* TODO: cleanup after the client */
135}
136
137int main(int argc, char **argv)
138{
139 printf(NAME ": HelenOS VFS server\n");
140
141 /*
142 * Initialize VFS node hash table.
143 */
144 if (!vfs_nodes_init()) {
145 printf(NAME ": Failed to initialize VFS node hash table\n");
146 return ENOMEM;
147 }
148
149 /*
150 * Allocate and initialize the Path Lookup Buffer.
151 */
152 plb = as_get_mappable_page(PLB_SIZE);
153 if (!plb) {
154 printf(NAME ": Cannot allocate a mappable piece of address space\n");
155 return ENOMEM;
156 }
157
158 if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
159 AS_AREA_CACHEABLE) != plb) {
160 printf(NAME ": Cannot create address space area\n");
161 return ENOMEM;
162 }
163 memset(plb, 0, PLB_SIZE);
164
165 /*
166 * Set a connection handling function/fibril.
167 */
168 async_set_client_connection(vfs_connection);
169
170 /*
171 * Register at the naming service.
172 */
173 ipcarg_t phonead;
174 ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead);
175
176 /*
177 * Start accepting connections.
178 */
179 printf(NAME ": Accepting connections\n");
180 async_manager();
181 return 0;
182}
183
184/**
185 * @}
186 */
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