Subversion Repositories HelenOS

Rev

Rev 3424 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2518 jermar 1
/*
2693 jermar 2
 * Copyright (c) 2008 Jakub Jermar
2518 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
2542 jermar 35
 * @brief   VFS service for HelenOS.
2518 jermar 36
 */
37
 
2520 jermar 38
#include <ipc/ipc.h>
39
#include <ipc/services.h>
40
#include <async.h>
41
#include <errno.h>
2532 jermar 42
#include <stdio.h>
2523 jermar 43
#include <bool.h>
2542 jermar 44
#include <string.h>
45
#include <as.h>
2526 jermar 46
#include <libadt/list.h>
2552 jermar 47
#include <atomic.h>
2520 jermar 48
#include "vfs.h"
49
 
3424 svoboda 50
#define NAME "vfs"
51
 
2520 jermar 52
static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
53
{
2523 jermar 54
    bool keep_on_going = 1;
2520 jermar 55
 
56
    /*
57
     * The connection was opened via the IPC_CONNECT_ME_TO call.
58
     * This call needs to be answered.
59
     */
2619 jermar 60
    ipc_answer_0(iid, EOK);
2520 jermar 61
 
62
    /*
2523 jermar 63
     * Here we enter the main connection fibril loop.
64
     * The logic behind this loop and the protocol is that we'd like to keep
2560 jermar 65
     * each connection open until the client hangs up. When the client hangs
66
     * up, we will free its VFS state. The act of hanging up the connection
67
     * by the client is equivalent to client termination because we cannot
68
     * distinguish one from the other. On the other hand, the client can
69
     * hang up arbitrarily if it has no open files and reestablish the
70
     * connection later.
2520 jermar 71
     */
2523 jermar 72
    while (keep_on_going) {
73
        ipc_callid_t callid;
74
        ipc_call_t call;
75
 
76
        callid = async_get_call(&call);
2532 jermar 77
 
2523 jermar 78
        switch (IPC_GET_METHOD(call)) {
79
        case IPC_M_PHONE_HUNGUP:
80
            keep_on_going = false;
81
            break;
82
        case VFS_REGISTER:
83
            vfs_register(callid, &call);
2569 jermar 84
            keep_on_going = false;
2523 jermar 85
            break;
86
        case VFS_MOUNT:
2589 jermar 87
            vfs_mount(callid, &call);
88
            break;
89
        case VFS_OPEN:
90
            vfs_open(callid, &call);
91
            break;
2734 jermar 92
        case VFS_CLOSE:
93
            vfs_close(callid, &call);
94
            break;
2625 jermar 95
        case VFS_READ:
96
            vfs_read(callid, &call);
97
            break;
2666 jermar 98
        case VFS_WRITE:
99
            vfs_write(callid, &call);
100
            break;
2684 jermar 101
        case VFS_SEEK:
102
            vfs_seek(callid, &call);
103
            break;
2690 jermar 104
        case VFS_TRUNCATE:
2693 jermar 105
            vfs_truncate(callid, &call);
106
            break;
2707 jermar 107
        case VFS_MKDIR:
108
            vfs_mkdir(callid, &call);
109
            break;
2735 jermar 110
        case VFS_UNLINK:
111
            vfs_unlink(callid, &call);
112
            break;
2763 jermar 113
        case VFS_RENAME:
114
            vfs_rename(callid, &call);
115
            break;
2523 jermar 116
        default:
2619 jermar 117
            ipc_answer_0(callid, ENOTSUP);
2523 jermar 118
            break;
119
        }
2520 jermar 120
    }
2523 jermar 121
 
122
    /* TODO: cleanup after the client */
123
 
2520 jermar 124
}
125
 
2518 jermar 126
int main(int argc, char **argv)
127
{
2520 jermar 128
    ipcarg_t phonead;
129
 
3424 svoboda 130
    printf(NAME ": HelenOS VFS server\n");
2532 jermar 131
 
2542 jermar 132
    /*
133
     * Initialize the list of registered file systems.
134
     */
2526 jermar 135
    list_initialize(&fs_head);
2542 jermar 136
 
137
    /*
2596 jermar 138
     * Initialize VFS node hash table.
139
     */
140
    if (!vfs_nodes_init()) {
3424 svoboda 141
        printf(NAME ": Failed to initialize VFS node hash table\n");
2596 jermar 142
        return ENOMEM;
143
    }
144
 
145
    /*
2542 jermar 146
     * Allocate and initialize the Path Lookup Buffer.
147
     */
148
    list_initialize(&plb_head);
149
    plb = as_get_mappable_page(PLB_SIZE);
2543 jermar 150
    if (!plb) {
3424 svoboda 151
        printf(NAME ": Cannot allocate a mappable piece of address space\n");
2543 jermar 152
        return ENOMEM;
153
    }
154
    if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
155
        AS_AREA_CACHEABLE) != plb) {
3424 svoboda 156
        printf(NAME ": Cannot create address space area\n");
2543 jermar 157
        return ENOMEM;
158
    }
159
    memset(plb, 0, PLB_SIZE);
2542 jermar 160
 
161
    /*
162
     * Set a connectio handling function/fibril.
163
     */
2520 jermar 164
    async_set_client_connection(vfs_connection);
2542 jermar 165
 
166
    /*
167
     * Register at the naming service.
168
     */
2637 cejka 169
    ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead);
2542 jermar 170
 
171
    /*
172
     * Start accepting connections.
173
     */
3424 svoboda 174
    printf(NAME ": Accepting connections\n");
2520 jermar 175
    async_manager();
2518 jermar 176
    return 0;
177
}
178
 
179
/**
180
 * @}
181
 */