repair/agheader.h

   1 /*
   2  * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 typedef struct fs_geometry  {
  34         /*
  35          * these types should match the superblock types
  36          */
  37         __uint32_t      sb_blocksize;   /* blocksize (bytes) */
  38         xfs_drfsbno_t   sb_dblocks;     /* # data blocks */
  39         xfs_drfsbno_t   sb_rblocks;     /* # realtime blocks */
  40         xfs_drtbno_t    sb_rextents;    /* # realtime extents */
  41         uuid_t          sb_uuid;        /* fs uuid */
  42         xfs_dfsbno_t    sb_logstart;    /* starting log block # */
  43         xfs_agblock_t   sb_rextsize;    /* realtime extent size (blocks )*/
  44         xfs_agblock_t   sb_agblocks;    /* # of blocks per ag */
  45         xfs_agnumber_t  sb_agcount;     /* # of ags */
  46         xfs_extlen_t    sb_rbmblocks;   /* # of rt bitmap blocks */
  47         xfs_extlen_t    sb_logblocks;   /* # of log blocks */
  48         __uint16_t      sb_sectsize;    /* volume sector size (bytes) */
  49         __uint16_t      sb_inodesize;   /* inode size (bytes) */
  50         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
  51
  52         /*
  53          * these don't have to match the superblock types but are placed
  54          * before sb_shared_vn because these values don't have to be
  55          * checked manually.  These variables will be set only on
  56          * filesystems with dependably good (fully initialized)
  57          * secondary superblock sectors, will be stamped in all
  58          * superblocks at mkfs time, and are features that cannot
  59          * be downgraded unless all superblocks in the filesystem
  60          * are rewritten.
  61          */
  62         int             sb_extflgbit;   /* extent flag feature bit set */
  63
  64         /*
  65          * fields after this point have to be checked manually in compare_sb()
  66          */
  67         __uint8_t       sb_shared_vn;   /* shared version number */
  68         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
  69         __uint32_t      sb_unit;        /* stripe or raid unit */
  70         __uint32_t      sb_width;       /* stripe or width unit */
  71
  72         /*
  73          * these don't have to match, they track superblock properties
  74          * that could have been upgraded and/or downgraded during
  75          * run-time so that the primary superblock has them but the
  76          * secondaries do not.
  77          * Plus, they have associated data fields whose data fields may
  78          * be corrupt in cases where the filesystem was made on a
  79          * pre-6.5 campus alpha mkfs and the feature was enabled on
  80          * the filesystem later.
  81          */
  82         int             sb_ialignbit;   /* sb has inode alignment bit set */
  83         int             sb_salignbit;   /* sb has stripe alignment bit set */
  84         int             sb_sharedbit;   /* sb has inode alignment bit set */
  85
  86         int             sb_fully_zeroed; /* has zeroed secondary sb sectors */
  87 } fs_geometry_t;
  88
  89 typedef struct fs_geo_list  {
  90         struct fs_geo_list      *next;
  91         int                     refs;
  92         int                     index;
  93         fs_geometry_t           geo;
  94 } fs_geo_list_t;
  95
  96 /*
  97  * fields for sb_last_nonzero
  98  */
  99
 100 #define XR_SB_COUNTERS          0x0001
 101 #define XR_SB_INOALIGN          0x0002
 102 #define XR_SB_SALIGN            0x0004
 103
 104 /*
 105  * what got modified by verify_set_* routines
 106  */
 107
 108 #define XR_AG_SB        0x1
 109 #define XR_AG_AGF       0x2
 110 #define XR_AG_AGI       0x4
 111 #define XR_AG_SB_SEC    0x8