Rev 2404 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2404 | Rev 2435 | ||
|---|---|---|---|
| 1 | /* |
1 | /* |
| 2 | * Copyright (c) 1987,1997, Prentice Hall |
2 | * Copyright (c) 1987,1997, Prentice Hall |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use of the MINIX operating system in source and |
5 | * Redistribution and use of the MINIX operating system in source and |
| 6 | * binary forms, with or without modification, are permitted provided |
6 | * binary forms, with or without modification, are permitted provided |
| 7 | * that the following conditions are met: |
7 | * that the following conditions are met: |
| 8 | 8 | ||
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | 11 | ||
| 12 | * - Redistributions in binary form must reproduce the above |
12 | * - Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following |
13 | * copyright notice, this list of conditions and the following |
| 14 | * disclaimer in the documentation and/or other materials provided |
14 | * disclaimer in the documentation and/or other materials provided |
| 15 | * with the distribution. |
15 | * with the distribution. |
| 16 | 16 | ||
| 17 | * - Neither the name of Prentice Hall nor the names of the software |
17 | * - Neither the name of Prentice Hall nor the names of the software |
| 18 | * authors or contributors may be used to endorse or promote |
18 | * authors or contributors may be used to endorse or promote |
| 19 | * products derived from this software without specific prior |
19 | * products derived from this software without specific prior |
| 20 | * written permission. |
20 | * written permission. |
| 21 | 21 | ||
| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND |
| 23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 26 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE |
26 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE |
| 27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
34 | */ |
| 35 | 35 | ||
| - | 36 | /** @addtogroup FileSystemImpl |
|
| - | 37 | * @{ |
|
| - | 38 | */ |
|
| 36 | 39 | ||
| 37 | /* Inode table. This table holds inodes that are currently in use. In some |
- | |
| 38 | * cases they have been opened by an open() or creat() system call, in other |
- | |
| 39 | * cases the file system itself needs the inode for one reason or another, |
- | |
| - | 40 | /** |
|
| 40 | * such as to search a directory for a path name. |
41 | * @file inode.h |
| 41 | * The first part of the struct holds fields that are present on the |
- | |
| 42 | * disk; the second part holds fields not present on the disk. |
42 | * @brief Inode table definition. |
| 43 | */ |
43 | */ |
| 44 | 44 | ||
| 45 | #ifndef _INODE_H |
45 | #ifndef _INODE_H |
| 46 | #define _INODE_H |
46 | #define _INODE_H |
| 47 | 47 | ||
| 48 | #include "super.h" |
48 | #include "super.h" |
| 49 | 49 | ||
| 50 | #define NIL_INODE (inode_t *) 0 /* indicates absence of inode slot */ |
50 | #define NIL_INODE (inode_t *) 0 /**< indicates absence of inode slot */ |
| 51 | 51 | ||
| 52 | #define NO_SEEK 0 /* i_seek = NO_SEEK if last op was not SEEK */ |
52 | #define NO_SEEK 0 /**< i_seek = NO_SEEK if last op was not SEEK */ |
| 53 | #define ISEEK 1 /* i_seek = ISEEK if last op was SEEK */ |
53 | #define ISEEK 1 /**< i_seek = ISEEK if last op was SEEK */ |
| 54 | 54 | ||
| - | 55 | /* |
|
| - | 56 | * This table holds inodes that are currently in use. In some |
|
| - | 57 | * cases they have been opened by an open() or creat() system call, in other |
|
| - | 58 | * cases the file system itself needs the inode for one reason or another, |
|
| - | 59 | * such as to search a directory for a path name. |
|
| - | 60 | * The first part of the struct holds fields that are present on the |
|
| - | 61 | * disk; the second part holds fields not present on the disk. |
|
| - | 62 | */ |
|
| 55 | typedef struct { |
63 | typedef struct { |
| 56 | mode_t i_mode; /* file type, protection, etc. */ |
64 | mode_t i_mode; /**< file type, protection, etc. */ |
| 57 | nlink_t i_nlinks; /* how many links to this file */ |
65 | nlink_t i_nlinks; /**< how many links to this file */ |
| 58 | offset_t i_size; /* current file size in bytes */ |
66 | offset_t i_size; /**< current file size in bytes */ |
| 59 | zone_t i_zone[V2_NR_TZONES]; /* zone numbers for direct, ind, and dbl ind */ |
67 | zone_t i_zone[V2_NR_TZONES]; /**< zone numbers for direct, ind, and dbl ind */ |
| 60 | 68 | ||
| 61 | /* The following items are not present on the disk. */ |
69 | /* The following items are not present on the disk. */ |
| 62 | dev_t i_dev; /* which device is the inode on */ |
70 | dev_t i_dev; /**< which device is the inode on */ |
| 63 | ino_t i_num; /* inode number on its (minor) device */ |
71 | ino_t i_num; /**< inode number on its (minor) device */ |
| 64 | int i_count; /* # times inode used; 0 means slot is free */ |
72 | int i_count; /**< # times inode used; 0 means slot is free */ |
| 65 | int i_ndzones; /* # direct zones (NR_DZONES) */ |
73 | int i_ndzones; /**< # direct zones (NR_DZONES) */ |
| 66 | int i_nindirs; /* # indirect zones per indirect block */ |
74 | int i_nindirs; /**< # indirect zones per indirect block */ |
| 67 | super_block_t *i_sp; /* pointer to super block for inode's device */ |
75 | super_block_t *i_sp; /**< pointer to super block for inode's device */ |
| 68 | char i_seek; /* set on LSEEK, cleared on READ */ |
76 | char i_seek; /**< set on LSEEK, cleared on READ */ |
| 69 | } inode_t; |
77 | } inode_t; |
| 70 | 78 | ||
| 71 | extern inode_t inode[NR_INODES]; |
79 | extern inode_t inode[NR_INODES]; |
| 72 | 80 | ||
| 73 | #endif /* _INODE_H */ |
81 | #endif /* _INODE_H */ |
| - | 82 | ||
| - | 83 | /** |
|
| - | 84 | * } |
|
| - | 85 | */ |
|
| - | 86 | ||
| 74 | 87 | ||