sys/vfs/gnu/ext2fs/ext2_inode_cnv.c

   1 /*
   2  * Copyright (c) 1995 The University of Utah and
   3  * the Computer Systems Laboratory at the University of Utah (CSL).
   4  * All rights reserved.
   5  *
   6  * Permission to use, copy, modify and distribute this software is hereby
   7  * granted provided that (1) source code retains these copyright, permission,
   8  * and disclaimer notices, and (2) redistributions including binaries
   9  * reproduce the notices in supporting documentation, and (3) all advertising
  10  * materials mentioning features or use of this software display the following
  11  * acknowledgement: ``This product includes software developed by the
  12  * Computer Systems Laboratory at the University of Utah.''
  13  *
  14  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  15  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  16  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  17  *
  18  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  19  * improvements that they make and grant CSL redistribution rights.
  20  *
  21  *      Utah $Hdr$
  22  * $FreeBSD: src/sys/gnu/ext2fs/ext2_inode_cnv.c,v 1.11 2000/01/01 17:39:21 bde Exp $
  23  * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2_inode_cnv.c,v 1.7 2006/12/23 00:41:29 swildner Exp $
  24  */
  25
  26 /*
  27  * routines to convert on disk ext2 inodes in dinodes and back
  28  */
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/lock.h>
  32 #include <sys/stat.h>
  33 #include <sys/vnode.h>
  34
  35 #include <machine/inttypes.h>
  36
  37 #include "quota.h"
  38
  39 #define NO_I_DEFINES
  40 #include "inode.h"
  41 #include "ext2_fs.h"
  42 #include "ext2_extern.h"
  43
  44 void
  45 ext2_print_dinode(struct ext2_dinode *di)
  46 {
  47         int i;
  48         kprintf( /* "Inode: %5d" */
  49                 " Type: %10s Mode: 0x%o Flags: 0x%x  Version: %d\n",
  50                 "n/a", di->di_mode, di->di_flags, di->di_gen);
  51         kprintf( "User: %5lu Group: %5lu  Size: %lu\n",
  52                 (unsigned long)di->di_uid, (unsigned long)di->di_gid,
  53                 (unsigned long)di->di_size);
  54         kprintf( "Links: %3d Blockcount: %d\n",
  55                 di->di_nlink, di->di_blocks);
  56         kprintf( "ctime: 0x%x", di->di_ctime);
  57         kprintf( "atime: 0x%x", di->di_atime);
  58         kprintf( "mtime: 0x%x", di->di_mtime);
  59         kprintf( "BLOCKS: ");
  60         for(i=0; i < (di->di_blocks <= 24 ? ((di->di_blocks+1)/2): 12); i++)
  61                 kprintf("%d ", di->di_db[i]);
  62         kprintf("\n");
  63 }
  64
  65 void
  66 ext2_print_inode(struct inode *in)
  67 {
  68         kprintf( "Inode: %"PRId64, in->i_number);
  69         ext2_print_dinode(&in->i_din);
  70 }
  71
  72 /*
  73  *      raw ext2 inode to dinode
  74  */
  75 void
  76 ext2_ei2di(struct ext2_inode *ei, struct ext2_dinode *di)
  77 {
  78         int     i;
  79
  80         di->di_nlink    = ei->i_links_count;
  81         /* Godmar thinks - if the link count is zero, then the inode is
  82            unused - according to ext2 standards. Ufs marks this fact
  83            by setting i_mode to zero - why ?
  84            I can see that this might lead to problems in an undelete.
  85         */
  86         di->di_mode     = ei->i_links_count ? ei->i_mode : 0;
  87         di->di_size     = ei->i_size;
  88         di->di_atime    = ei->i_atime;
  89         di->di_mtime    = ei->i_mtime;
  90         di->di_ctime    = ei->i_ctime;
  91         di->di_flags    = 0;
  92         di->di_flags    |= (ei->i_flags & EXT2_APPEND_FL) ? APPEND : 0;
  93         di->di_flags    |= (ei->i_flags & EXT2_IMMUTABLE_FL) ? IMMUTABLE : 0;
  94         di->di_blocks   = ei->i_blocks;
  95         di->di_gen      = ei->i_generation;
  96         di->di_uid      = ei->i_uid;
  97         di->di_gid      = ei->i_gid;
  98         /* XXX use memcpy */
  99         for(i = 0; i < NDADDR; i++)
 100                 di->di_db[i] = ei->i_block[i];
 101         for(i = 0; i < NIADDR; i++)
 102                 di->di_ib[i] = ei->i_block[EXT2_NDIR_BLOCKS + i];
 103 }
 104
 105 /*
 106  *      dinode to raw ext2 inode
 107  */
 108 void
 109 ext2_di2ei(struct ext2_dinode *di, struct ext2_inode *ei)
 110 {
 111         int     i;
 112
 113         ei->i_mode              = di->di_mode;
 114         ei->i_links_count       = di->di_nlink;
 115         /*
 116            Godmar thinks: if dtime is nonzero, ext2 says this inode
 117            has been deleted, this would correspond to a zero link count
 118          */
 119         ei->i_dtime             = ei->i_links_count ? 0 : di->di_mtime;
 120         ei->i_size              = di->di_size;
 121         ei->i_atime             = di->di_atime;
 122         ei->i_mtime             = di->di_mtime;
 123         ei->i_ctime             = di->di_ctime;
 124         ei->i_flags             = di->di_flags;
 125         ei->i_flags             = 0;
 126         ei->i_flags             |= (di->di_flags & APPEND) ? EXT2_APPEND_FL: 0;
 127         ei->i_flags             |= (di->di_flags & IMMUTABLE)
 128                                                         ? EXT2_IMMUTABLE_FL: 0;
 129         ei->i_blocks            = di->di_blocks;
 130         ei->i_generation        = di->di_gen;
 131         ei->i_uid               = di->di_uid;
 132         ei->i_gid               = di->di_gid;
 133         /* XXX use memcpy */
 134         for(i = 0; i < NDADDR; i++)
 135                 ei->i_block[i] = di->di_db[i];
 136         for(i = 0; i < NIADDR; i++)
 137                 ei->i_block[EXT2_NDIR_BLOCKS + i] = di->di_ib[i];
 138 }