| 1 | /* |
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| 2 | * ramfs.h RAMFS file system API definition. |
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| 3 | * |
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| 4 | * Authors Mohamed Lamine Karaoui (2014,2015) |
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| 5 | * Alain Greiner (2016,2017) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | #ifndef _RAMFS_H_ |
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| 26 | #define _RAMFS_H_ |
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| 27 | |
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| 28 | /////////////////////////////////////////////////////////////////////////////////////////// |
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| 29 | // The RAMFS File System does not uses any external device to store data. |
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| 30 | // It stores the dynamically created files and directories in the VFS mappers. |
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| 31 | // The ramfs_read_page() and ramfs_write_page() functions should never be used. |
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| 32 | // The RAMFS cannot be used as the root File System. |
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| 33 | // |
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| 34 | // There is no RAMFS context extension, and no RAMFS inode extension. |
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| 35 | /////////////////////////////////////////////////////////////////////////////////////////// |
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| 36 | |
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| 37 | |
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| 38 | |
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| 39 | /****************************************************************************************** |
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| 40 | * This function mount a RAMFS on a given inode of the root FS. |
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| 41 | * It actually creates a new VFS dentry in the cluster containing the parent inode, |
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| 42 | * and create a new VFS inode in another cluster. |
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| 43 | ****************************************************************************************** |
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| 44 | * @ parent_inode_xp : extended pointer on the parent inode in VFS. |
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| 45 | * @ ramfs_root_name : RAMFS root directory name. |
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| 46 | *****************************************************************************************/ |
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| 47 | error_t ramfs_mount( xptr_t parent_inode_xp, |
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| 48 | char * ramfs_root_name ); |
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| 49 | |
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| 50 | #endif /* _RAMFS_H_ */ |
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