repair/agheader.h

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 typedef struct fs_geometry  {
  20         /*
  21          * these types should match the superblock types
  22          */
  23         __uint32_t      sb_blocksize;   /* blocksize (bytes) */
  24         xfs_drfsbno_t   sb_dblocks;     /* # data blocks */
  25         xfs_drfsbno_t   sb_rblocks;     /* # realtime blocks */
  26         xfs_drtbno_t    sb_rextents;    /* # realtime extents */
  27         uuid_t          sb_uuid;        /* fs uuid */
  28         xfs_dfsbno_t    sb_logstart;    /* starting log block # */
  29         xfs_agblock_t   sb_rextsize;    /* realtime extent size (blocks )*/
  30         xfs_agblock_t   sb_agblocks;    /* # of blocks per ag */
  31         xfs_agnumber_t  sb_agcount;     /* # of ags */
  32         xfs_extlen_t    sb_rbmblocks;   /* # of rt bitmap blocks */
  33         xfs_extlen_t    sb_logblocks;   /* # of log blocks */
  34         __uint16_t      sb_sectsize;    /* volume sector size (bytes) */
  35         __uint16_t      sb_inodesize;   /* inode size (bytes) */
  36         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
  37
  38         /*
  39          * these don't have to match the superblock types but are placed
  40          * before sb_shared_vn because these values don't have to be
  41          * checked manually.  These variables will be set only on
  42          * filesystems with dependably good (fully initialized)
  43          * secondary superblock sectors, will be stamped in all
  44          * superblocks at mkfs time, and are features that cannot
  45          * be downgraded unless all superblocks in the filesystem
  46          * are rewritten.
  47          */
  48         int             sb_extflgbit;   /* extent flag feature bit set */
  49
  50         /*
  51          * fields after this point have to be checked manually in compare_sb()
  52          */
  53         __uint8_t       sb_shared_vn;   /* shared version number */
  54         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
  55         __uint32_t      sb_unit;        /* stripe or raid unit */
  56         __uint32_t      sb_width;       /* stripe or width unit */
  57
  58         /*
  59          * these don't have to match, they track superblock properties
  60          * that could have been upgraded and/or downgraded during
  61          * run-time so that the primary superblock has them but the
  62          * secondaries do not.
  63          * Plus, they have associated data fields whose data fields may
  64          * be corrupt in cases where the filesystem was made on a
  65          * pre-6.5 campus alpha mkfs and the feature was enabled on
  66          * the filesystem later.
  67          */
  68         int             sb_ialignbit;   /* sb has inode alignment bit set */
  69         int             sb_salignbit;   /* sb has stripe alignment bit set */
  70         int             sb_sharedbit;   /* sb has inode alignment bit set */
  71
  72         int             sb_fully_zeroed; /* has zeroed secondary sb sectors */
  73 } fs_geometry_t;
  74
  75 typedef struct fs_geo_list  {
  76         struct fs_geo_list      *next;
  77         int                     refs;
  78         int                     index;
  79         fs_geometry_t           geo;
  80 } fs_geo_list_t;
  81
  82 /*
  83  * fields for sb_last_nonzero
  84  */
  85
  86 #define XR_SB_COUNTERS          0x0001
  87 #define XR_SB_INOALIGN          0x0002
  88 #define XR_SB_SALIGN            0x0004
  89
  90 /*
  91  * what got modified by verify_set_* routines
  92  */
  93
  94 #define XR_AG_SB        0x1
  95 #define XR_AG_AGF       0x2
  96 #define XR_AG_AGI       0x4
  97 #define XR_AG_SB_SEC    0x8