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| 2 | pj | 1 | /* |
| 2 | * Project: HARTIK (HA-rd R-eal TI-me K-ernel) |
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| 3 | * |
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| 4 | * Coordinators: Giorgio Buttazzo <giorgio@sssup.it> |
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| 5 | * Gerardo Lamastra <gerardo@sssup.it> |
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| 6 | * |
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| 7 | * Authors : Massimiliano Giorgi <massy@hartik.sssup.it> |
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| 8 | * (see authors.txt for full list of hartik's authors) |
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| 9 | * |
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| 10 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 11 | * |
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| 12 | * http://www.sssup.it |
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| 13 | * http://retis.sssup.it |
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| 14 | * http://hartik.sssup.it |
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| 15 | */ |
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| 16 | |||
| 17 | /* |
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| 18 | * Copyright (C) 1999 Massimiliano Giorgi |
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| 19 | * |
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| 20 | * This program is free software; you can redistribute it and/or modify |
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| 21 | * it under the terms of the GNU General Public License as published by |
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| 22 | * the Free Software Foundation; either version 2 of the License, or |
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| 23 | * (at your option) any later version. |
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| 24 | * |
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| 25 | * This program is distributed in the hope that it will be useful, |
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| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 28 | * GNU General Public License for more details. |
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| 29 | * |
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| 30 | * You should have received a copy of the GNU General Public License |
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| 31 | * along with this program; if not, write to the Free Software |
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| 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 33 | * |
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| 34 | */ |
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| 35 | |||
| 36 | /* |
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| 37 | * CVS : $Id: dentry.h,v 1.1.1.1 2002-03-29 14:12:50 pj Exp $ |
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| 38 | * |
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| 39 | * File: $File$ |
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| 40 | * Revision: $Revision: 1.1.1.1 $ |
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| 41 | * Last update: $Date: 2002-03-29 14:12:50 $ |
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| 42 | */ |
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| 43 | |||
| 44 | /*** |
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| 45 | The "dentry" structure: it contains a directory entry (only the filename). |
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| 46 | ***/ |
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| 47 | |||
| 48 | #ifndef __DENTRY_H__ |
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| 49 | #define __DENTRY_H__ |
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| 50 | |||
| 51 | #include <fs/limits.h> |
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| 52 | #include <fs/const.h> |
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| 53 | #include <fs/types.h> |
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| 54 | #include <fs/magic.h> |
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| 55 | |||
| 56 | struct qstr { |
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| 57 | char name[MAXFILENAMELEN+1]; |
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| 58 | char *nameptr; |
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| 59 | }; |
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| 60 | |||
| 61 | #define QSTRNAME(ptr) ((ptr)->nameptr!=NULL?(ptr)->nameptr:(ptr)->name) |
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| 62 | |||
| 63 | struct dentry { |
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| 64 | |||
| 65 | DECLARE_MAGIC(magic); |
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| 66 | |||
| 67 | struct dentry *d_next; |
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| 68 | struct dentry *d_prev; |
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| 69 | struct dentry *d_parent; |
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| 70 | struct dentry *d_child; |
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| 71 | |||
| 72 | __time_t d_acc; |
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| 73 | struct qstr d_name; |
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| 74 | |||
| 75 | short d_lock; |
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| 76 | |||
| 77 | struct dentry_operations *d_op; |
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| 78 | struct inode *d_inode; |
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| 79 | struct super_block *d_sb; |
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| 80 | }; |
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| 81 | |||
| 82 | int dentry_init(void); |
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| 83 | int set_root_dentry(struct super_block *sb); |
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| 84 | struct dentry *get_root_dentry(void); |
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| 85 | |||
| 86 | struct dentry *get_dentry(void); |
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| 87 | void free_dentry(struct dentry *); |
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| 88 | void insert_dentry(struct dentry *den, struct dentry *parent); |
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| 89 | void remove_dentry(struct dentry *den); |
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| 90 | struct dentry *purge_dentry(void); |
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| 91 | |||
| 92 | int unlink_dentry(struct dentry *den); |
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| 93 | |||
| 94 | int mount_dentry(struct super_block *sb, struct dentry *de); |
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| 95 | int umount_dentry(struct super_block *sb); |
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| 96 | |||
| 97 | void getfullname_dentry(struct dentry *act, char *buffer, int size); |
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| 98 | |||
| 99 | |||
| 100 | /* flags for createflags */ |
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| 101 | #define DENTRY_NOCREATE 0x00 |
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| 102 | #define DENTRY_CANCREATE 0x01 |
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| 103 | #define DENTRY_MUSTCREATE 0x03 |
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| 104 | |||
| 105 | #define DENTRY_CREATEMASK 0x03 |
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| 106 | |||
| 107 | /* return flags for createflags */ |
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| 108 | #define DENTRY_CREATED 0x01 |
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| 109 | #define DENTRY_EXIST 0x02 |
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| 110 | |||
| 111 | struct dentry *find_dentry_from_ext(struct dentry *, |
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| 112 | char *pathname, |
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| 113 | int *createflags); |
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| 114 | void unlock_dentry(struct dentry *den); |
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| 115 | |||
| 116 | extern __inline__ struct dentry *find_dentry_from(struct dentry *den, |
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| 117 | char *pathname) |
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| 118 | { |
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| 119 | return find_dentry_from_ext(den,pathname,NULL); |
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| 120 | } |
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| 121 | |||
| 122 | #endif |