Subversion Repositories HelenOS

Rev

Rev 2542 | Rev 2552 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2518 jermar 1
/*
2
 * Copyright (c) 2007 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
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>
2520 jermar 47
#include "vfs.h"
48
 
2532 jermar 49
#define dprintf(...)    printf(__VA_ARGS__)
50
 
2520 jermar 51
static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
52
{
2523 jermar 53
    bool keep_on_going = 1;
2520 jermar 54
 
2532 jermar 55
    printf("Connection opened from %p\n", icall->in_phone_hash);
56
 
2520 jermar 57
    /*
58
     * The connection was opened via the IPC_CONNECT_ME_TO call.
59
     * This call needs to be answered.
60
     */
2523 jermar 61
    ipc_answer_fast(iid, EOK, 0, 0);
2520 jermar 62
 
63
    /*
2523 jermar 64
     * Here we enter the main connection fibril loop.
65
     * The logic behind this loop and the protocol is that we'd like to keep
66
     * each connection open for a while before we close it. The benefit of
67
     * this is that the client doesn't have to establish a new connection
68
     * upon each request.  On the other hand, the client must be ready to
69
     * re-establish a connection if we hang it up due to reaching of maximum
70
     * number of requests per connection or due to the client timing out.
2520 jermar 71
     */
2523 jermar 72
 
73
    while (keep_on_going) {
74
        ipc_callid_t callid;
75
        ipc_call_t call;
76
 
77
        callid = async_get_call(&call);
2532 jermar 78
 
79
        printf("Received call, method=%d\n", IPC_GET_METHOD(call));
2523 jermar 80
 
81
        switch (IPC_GET_METHOD(call)) {
82
        case IPC_M_PHONE_HUNGUP:
83
            keep_on_going = false;
84
            break;
85
        case VFS_REGISTER:
86
            vfs_register(callid, &call);
87
            keep_on_going = false;
88
            break;
89
        case VFS_MOUNT:
90
        case VFS_UNMOUNT:
91
        case VFS_OPEN:
92
        case VFS_CREATE:
93
        case VFS_CLOSE:
94
        case VFS_READ:
95
        case VFS_WRITE:
96
        case VFS_SEEK:
97
        default:
98
            ipc_answer_fast(callid, ENOTSUP, 0, 0);
99
            break;
100
        }
2520 jermar 101
    }
2523 jermar 102
 
103
    /* TODO: cleanup after the client */
104
 
2520 jermar 105
}
106
 
2518 jermar 107
int main(int argc, char **argv)
108
{
2520 jermar 109
    ipcarg_t phonead;
110
 
2532 jermar 111
    printf("VFS: HelenOS VFS server\n");
112
 
2542 jermar 113
    /*
114
     * Initialize the list of registered file systems.
115
     */
2526 jermar 116
    list_initialize(&fs_head);
2542 jermar 117
 
118
    /*
119
     * Allocate and initialize the Path Lookup Buffer.
120
     */
121
    list_initialize(&plb_head);
122
    plb = as_get_mappable_page(PLB_SIZE);
2543 jermar 123
    if (!plb) {
124
        printf("Cannot allocate a mappable piece of address space\n");
125
        return ENOMEM;
126
    }
127
    if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
128
        AS_AREA_CACHEABLE) != plb) {
129
        printf("Cannot create address space area.\n");
130
        return ENOMEM;
131
    }
132
    memset(plb, 0, PLB_SIZE);
2542 jermar 133
 
134
    /*
135
     * Set a connectio handling function/fibril.
136
     */
2520 jermar 137
    async_set_client_connection(vfs_connection);
2542 jermar 138
 
139
    /*
140
     * Register at the naming service.
141
     */
2520 jermar 142
    ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead);
2542 jermar 143
 
144
    /*
145
     * Start accepting connections.
146
     */
2520 jermar 147
    async_manager();
2518 jermar 148
    return 0;
149
}
150
 
151
/**
152
 * @}
153
 */