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_rfsblock_t  sb_dblocks;     /* # data blocks */
  25         xfs_rfsblock_t  sb_rblocks;     /* # realtime blocks */
  26         xfs_rtblock_t   sb_rextents;    /* # realtime extents */
  27         xfs_fsblock_t   sb_logstart;    /* starting log block # */
  28         xfs_agblock_t   sb_rextsize;    /* realtime extent size (blocks )*/
  29         xfs_agblock_t   sb_agblocks;    /* # of blocks per ag */
  30         xfs_agnumber_t  sb_agcount;     /* # of ags */
  31         xfs_extlen_t    sb_rbmblocks;   /* # of rt bitmap blocks */
  32         xfs_extlen_t    sb_logblocks;   /* # of log blocks */
  33         uint16_t        sb_sectsize;    /* volume sector size (bytes) */
  34         uint16_t        sb_inodesize;   /* inode size (bytes) */
  35         uint8_t         sb_imax_pct;    /* max % of fs for inode space */
  36
  37         /*
  38          * these don't have to match the superblock types but are placed
  39          * before sb_shared_vn because these values don't have to be
  40          * checked manually.  These variables will be set only on
  41          * filesystems with dependably good (fully initialized)
  42          * secondary superblock sectors, will be stamped in all
  43          * superblocks at mkfs time, and are features that cannot
  44          * be downgraded unless all superblocks in the filesystem
  45          * are rewritten.
  46          */
  47         int             sb_extflgbit;   /* extent flag feature bit set */
  48
  49         /*
  50          * fields after this point have to be checked manually in compare_sb()
  51          */
  52         uint8_t         sb_shared_vn;   /* shared version number */
  53         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
  54         uint32_t        sb_unit;        /* stripe or raid unit */
  55         uint32_t        sb_width;       /* stripe or width unit */
  56
  57         /*
  58          * these don't have to match, they track superblock properties
  59          * that could have been upgraded and/or downgraded during
  60          * run-time so that the primary superblock has them but the
  61          * secondaries do not.
  62          * Plus, they have associated data fields whose data fields may
  63          * be corrupt in cases where the filesystem was made on a
  64          * pre-6.5 campus alpha mkfs and the feature was enabled on
  65          * the filesystem later.
  66          */
  67         int             sb_ialignbit;   /* sb has inode alignment bit set */
  68         int             sb_salignbit;   /* sb has stripe alignment bit set */
  69         int             sb_sharedbit;   /* sb has inode alignment bit set */
  70
  71         int             sb_fully_zeroed; /* has zeroed secondary sb sectors */
  72 } fs_geometry_t;
  73
  74 typedef struct fs_geo_list  {
  75         struct fs_geo_list      *next;
  76         int                     refs;
  77         int                     index;
  78         fs_geometry_t           geo;
  79 } fs_geo_list_t;
  80
  81 /*
  82  * fields for sb_last_nonzero
  83  */
  84
  85 #define XR_SB_COUNTERS          0x0001
  86 #define XR_SB_INOALIGN          0x0002
  87 #define XR_SB_SALIGN            0x0004
  88
  89 /*
  90  * what got modified by verify_set_* routines
  91  */
  92
  93 #define XR_AG_SB        0x1
  94 #define XR_AG_AGF       0x2
  95 #define XR_AG_AGI       0x4
  96 #define XR_AG_SB_SEC    0x8