Subversion Repositories HelenOS

Rev

Rev 3079 | 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
 
3079 decky 50
#define NAME "vfs"
51
 
2532 jermar 52
#define dprintf(...)    printf(__VA_ARGS__)
53
 
2520 jermar 54
static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
55
{
2523 jermar 56
    bool keep_on_going = 1;
2520 jermar 57
 
58
    /*
59
     * The connection was opened via the IPC_CONNECT_ME_TO call.
60
     * This call needs to be answered.
61
     */
2619 jermar 62
    ipc_answer_0(iid, EOK);
2520 jermar 63
 
64
    /*
2523 jermar 65
     * Here we enter the main connection fibril loop.
66
     * The logic behind this loop and the protocol is that we'd like to keep
2560 jermar 67
     * each connection open until the client hangs up. When the client hangs
68
     * up, we will free its VFS state. The act of hanging up the connection
69
     * by the client is equivalent to client termination because we cannot
70
     * distinguish one from the other. On the other hand, the client can
71
     * hang up arbitrarily if it has no open files and reestablish the
72
     * connection later.
2520 jermar 73
     */
2523 jermar 74
    while (keep_on_going) {
75
        ipc_callid_t callid;
76
        ipc_call_t call;
77
 
78
        callid = async_get_call(&call);
2532 jermar 79
 
2523 jermar 80
        switch (IPC_GET_METHOD(call)) {
81
        case IPC_M_PHONE_HUNGUP:
82
            keep_on_going = false;
83
            break;
84
        case VFS_REGISTER:
85
            vfs_register(callid, &call);
2569 jermar 86
            keep_on_going = false;
2523 jermar 87
            break;
88
        case VFS_MOUNT:
2589 jermar 89
            vfs_mount(callid, &call);
90
            break;
91
        case VFS_OPEN:
92
            vfs_open(callid, &call);
93
            break;
2734 jermar 94
        case VFS_CLOSE:
95
            vfs_close(callid, &call);
96
            break;
2625 jermar 97
        case VFS_READ:
98
            vfs_read(callid, &call);
99
            break;
2666 jermar 100
        case VFS_WRITE:
101
            vfs_write(callid, &call);
102
            break;
2684 jermar 103
        case VFS_SEEK:
104
            vfs_seek(callid, &call);
105
            break;
2690 jermar 106
        case VFS_TRUNCATE:
2693 jermar 107
            vfs_truncate(callid, &call);
108
            break;
2707 jermar 109
        case VFS_MKDIR:
110
            vfs_mkdir(callid, &call);
111
            break;
2735 jermar 112
        case VFS_UNLINK:
113
            vfs_unlink(callid, &call);
114
            break;
2763 jermar 115
        case VFS_RENAME:
116
            vfs_rename(callid, &call);
117
            break;
2523 jermar 118
        default:
2619 jermar 119
            ipc_answer_0(callid, ENOTSUP);
2523 jermar 120
            break;
121
        }
2520 jermar 122
    }
2523 jermar 123
 
124
    /* TODO: cleanup after the client */
125
 
2520 jermar 126
}
127
 
2518 jermar 128
int main(int argc, char **argv)
129
{
2520 jermar 130
    ipcarg_t phonead;
131
 
3079 decky 132
    printf(NAME ": HelenOS VFS server\n");
2532 jermar 133
 
2542 jermar 134
    /*
135
     * Initialize the list of registered file systems.
136
     */
2526 jermar 137
    list_initialize(&fs_head);
2542 jermar 138
 
139
    /*
2596 jermar 140
     * Initialize VFS node hash table.
141
     */
142
    if (!vfs_nodes_init()) {
3079 decky 143
        printf(NAME ": Failed to initialize VFS node hash table\n");
2596 jermar 144
        return ENOMEM;
145
    }
146
 
147
    /*
2542 jermar 148
     * Allocate and initialize the Path Lookup Buffer.
149
     */
150
    list_initialize(&plb_head);
151
    plb = as_get_mappable_page(PLB_SIZE);
2543 jermar 152
    if (!plb) {
3079 decky 153
        printf(NAME ": Cannot allocate a mappable piece of address space\n");
2543 jermar 154
        return ENOMEM;
155
    }
156
    if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
157
        AS_AREA_CACHEABLE) != plb) {
3079 decky 158
        printf(NAME ": Cannot create address space area\n");
2543 jermar 159
        return ENOMEM;
160
    }
161
    memset(plb, 0, PLB_SIZE);
2542 jermar 162
 
163
    /*
164
     * Set a connectio handling function/fibril.
165
     */
2520 jermar 166
    async_set_client_connection(vfs_connection);
2542 jermar 167
 
168
    /*
169
     * Register at the naming service.
170
     */
2637 cejka 171
    ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead);
2542 jermar 172
 
173
    /*
174
     * Start accepting connections.
175
     */
3079 decky 176
    printf(NAME ": Accepting connections\n");
2520 jermar 177
    async_manager();
2518 jermar 178
    return 0;
179
}
180
 
181
/**
182
 * @}
183
 */