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4417 decky 1
/*
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 * Copyright (c) 2009 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup fs
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 * @{
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 */
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/**
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 * @file devfs.c
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 * @brief Devices file system.
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 *
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 * Every device registered to device mapper is represented as a file in this
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 * file system.
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 */
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#include <stdio.h>
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#include <ipc/ipc.h>
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#include <ipc/services.h>
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#include <async.h>
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#include <errno.h>
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#include <libfs.h>
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#include "devfs.h"
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#include "devfs_ops.h"
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#define NAME  "devfs"
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static vfs_info_t devfs_vfs_info = {
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    .name = "devfs",
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};
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fs_reg_t devfs_reg;
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static void devfs_connection(ipc_callid_t iid, ipc_call_t *icall)
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{
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    if (iid)
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        ipc_answer_0(iid, EOK);
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    while (true) {
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        ipc_call_t call;
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        ipc_callid_t callid = async_get_call(&call);
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        switch  (IPC_GET_METHOD(call)) {
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        case IPC_M_PHONE_HUNGUP:
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            return;
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        case VFS_MOUNTED:
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            devfs_mounted(callid, &call);
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            break;
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        case VFS_MOUNT:
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            devfs_mount(callid, &call);
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            break;
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        case VFS_LOOKUP:
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            devfs_lookup(callid, &call);
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            break;
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        case VFS_OPEN_NODE:
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            devfs_open_node(callid, &call);
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            break;
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        case VFS_DEVICE:
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            devfs_device(callid, &call);
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            break;
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        case VFS_READ:
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            devfs_read(callid, &call);
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            break;
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        case VFS_WRITE:
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            devfs_write(callid, &call);
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            break;
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        case VFS_TRUNCATE:
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            devfs_truncate(callid, &call);
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            break;
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        case VFS_CLOSE:
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            devfs_close(callid, &call);
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            break;
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        case VFS_SYNC:
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            devfs_sync(callid, &call);
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            break;
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        case VFS_DESTROY:
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            devfs_destroy(callid, &call);
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            break;
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        default:
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            ipc_answer_0(callid, ENOTSUP);
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            break;
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        }
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    }
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}
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int main(int argc, char *argv[])
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{
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    printf(NAME ": HelenOS Device Filesystem\n");
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    if (!devfs_init()) {
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        printf(NAME ": failed to initialize devfs\n");
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        return -1;
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    }
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    int vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
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    if (vfs_phone < EOK) {
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        printf(NAME ": Unable to connect to VFS\n");
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        return -1;
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    }
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    int rc = fs_register(vfs_phone, &devfs_reg, &devfs_vfs_info,
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        devfs_connection);
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    if (rc != EOK) {
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        printf(NAME ": Failed to register file system (%d)\n", rc);
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        return rc;
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    }
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    printf(NAME ": Accepting connections\n");
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    async_manager();
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    /* Not reached */
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    return 0;
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}
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/**
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 * @}
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 */