The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/fs/ext2fs/ext2_dinode.h

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    1 /*-
    2  * Copyright (c) 2009 Aditya Sarawgi
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/9.1/sys/fs/ext2fs/ext2_dinode.h 233322 2012-03-22 20:31:52Z pfg $
   27  */
   28 
   29 #ifndef _FS_EXT2FS_EXT2_DINODE_H_
   30 #define _FS_EXT2FS_EXT2_DINODE_H_
   31 
   32 #define e2di_size_high  e2di_dacl
   33 
   34 /*
   35  * Special inode numbers
   36  * The root inode is the root of the file system.  Inode 0 can't be used for
   37  * normal purposes and bad blocks are normally linked to inode 1, thus
   38  * the root inode is 2.
   39  * Inode 3 to 10 are reserved in ext2fs.
   40  */
   41 #define EXT2_BADBLKINO          ((ino_t)1)
   42 #define EXT2_ROOTINO            ((ino_t)2)
   43 #define EXT2_ACLIDXINO          ((ino_t)3)
   44 #define EXT2_ACLDATAINO         ((ino_t)4)
   45 #define EXT2_BOOTLOADERINO      ((ino_t)5)
   46 #define EXT2_UNDELDIRINO        ((ino_t)6)
   47 #define EXT2_RESIZEINO          ((ino_t)7)
   48 #define EXT2_JOURNALINO         ((ino_t)8)
   49 #define EXT2_FIRSTINO           ((ino_t)11)
   50 
   51 /*
   52  * Inode flags
   53  * The current implementation uses only EXT2_IMMUTABLE and EXT2_APPEND flags
   54  */
   55 #define EXT2_SECRM              0x00000001      /* Secure deletion */
   56 #define EXT2_UNRM               0x00000002      /* Undelete */
   57 #define EXT2_COMPR              0x00000004      /* Compress file */
   58 #define EXT2_SYNC               0x00000008      /* Synchronous updates */
   59 #define EXT2_IMMUTABLE          0x00000010      /* Immutable file */
   60 #define EXT2_APPEND             0x00000020      /* writes to file may only append */
   61 #define EXT2_NODUMP             0x00000040      /* do not dump file */
   62 #define EXT2_NOATIME            0x00000080      /* do not update atime */
   63 
   64 /*
   65  * Definitions for nanosecond timestamps.
   66  * Ext3 inode versioning, 2006-12-13.
   67  */
   68 #define EXT3_EPOCH_BITS 2
   69 #define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1)
   70 #define EXT3_NSEC_MASK  (~0UL << EXT3_EPOCH_BITS)
   71 
   72 #define E2DI_HAS_XTIME(ip)      (EXT2_INODE_SIZE((ip)->i_e2fs) > \
   73                                     E2FS_REV0_INODE_SIZE)
   74 
   75 /*
   76  * Structure of an inode on the disk
   77  */
   78 struct ext2fs_dinode {
   79         uint16_t        e2di_mode;      /*   0: IFMT, permissions; see below. */
   80         uint16_t        e2di_uid;       /*   2: Owner UID */
   81         uint32_t        e2di_size;      /*       4: Size (in bytes) */
   82         uint32_t        e2di_atime;     /*       8: Access time */
   83         uint32_t        e2di_ctime;     /*      12: Change time */
   84         uint32_t        e2di_mtime;     /*      16: Modification time */
   85         uint32_t        e2di_dtime;     /*      20: Deletion time */
   86         uint16_t        e2di_gid;       /*  24: Owner GID */
   87         uint16_t        e2di_nlink;     /*  26: File link count */
   88         uint32_t        e2di_nblock;    /*  28: Blocks count */
   89         uint32_t        e2di_flags;     /*  32: Status flags (chflags) */
   90         uint32_t        e2di_version;   /*  36: Low 32 bits inode version */
   91         uint32_t        e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */
   92         uint32_t        e2di_gen;       /* 100: generation number */
   93         uint32_t        e2di_facl;      /* 104: file ACL (not implemented) */
   94         uint32_t        e2di_dacl;      /* 108: dir ACL (not implemented) */
   95         uint32_t        e2di_faddr;     /* 112: fragment address */
   96         uint8_t         e2di_nfrag;     /* 116: fragment number */
   97         uint8_t         e2di_fsize;     /* 117: fragment size */
   98         uint16_t        e2di_linux_reserved2; /* 118 */
   99         uint16_t        e2di_uid_high;  /* 120: Owner UID top 16 bits */
  100         uint16_t        e2di_gid_high;  /* 122: Owner GID top 16 bits */
  101         uint32_t        e2di_linux_reserved3; /* 124 */
  102         uint16_t        e2di_extra_isize;
  103         uint16_t        e2di_pad1;
  104         uint32_t        e2di_ctime_extra; /* Extra change time */
  105         uint32_t        e2di_mtime_extra; /* Extra modification time */
  106         uint32_t        e2di_atime_extra; /* Extra access time */
  107         uint32_t        e2di_crtime;      /* Creation (birth)time */
  108         uint32_t        e2di_crtime_extra; /* Extra creation (birth)time */
  109         uint32_t        e2di_version_hi;  /* High 30 bits of inode version */
  110 };
  111 
  112 #endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */
  113 

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