source: trunk/kernel/fs/ramfs.c @ 673

Last change on this file since 673 was 673, checked in by alain, 4 years ago

Introduce the DEBUG_VFS_ERROR in kernel_config to make
error messges display conditional.

File size: 1.8 KB
Line 
1/*
2 * ramfs.c  RAMFS file system API implementation.
3 *
4 * Authors   Mohamed Lamine Karaoui (2014,2015)
5 *           Alain Greiner (2016,2017)
6 *
7 * Copyright (c) UPMC Sorbonne Universites
8 *
9 * This file is part of ALMOS-MKH.
10 *
11 * ALMOS-MKH is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; version 2.0 of the License.
14 *
15 * ALMOS-MKH is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25
26#include <hal_kernel_types.h>
27#include <hal_special.h>
28#include <vfs.h>
29#include <cluster.h>
30#include <ramfs.h>
31
32
33//////////////////////////////////////////////
34error_t ramfs_mount( xptr_t   parent_inode_xp,
35                     char   * ramfs_root_name )
36{
37    xptr_t        dentry_xp;     // unused but required by vfs_add_child_in_parent()
38    xptr_t        inode_xp;
39    vfs_inode_t * inode_ptr;
40 
41    cxy_t     cxy = cluster_random_select();
42
43    // create VFS dentry and VFS inode for RAMFS root directory
44    return  vfs_add_child_in_parent( cxy,
45                                     FS_TYPE_RAMFS,
46                                     parent_inode_xp,
47                                     ramfs_root_name,
48                                     &dentry_xp,
49                                     &inode_xp );
50    // update inode type field
51    inode_ptr = GET_PTR( inode_xp );
52    inode_ptr->type = FILE_TYPE_DIR;
53}
54
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