2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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.
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.
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
19 typedef struct fs_geometry
{
21 * these types should match the superblock types
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 */
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
47 int sb_extflgbit
; /* extent flag feature bit set */
50 * fields after this point have to be checked manually in compare_sb()
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 */
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
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.
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 */
71 int sb_fully_zeroed
; /* has zeroed secondary sb sectors */
74 typedef struct fs_geo_list
{
75 struct fs_geo_list
*next
;
82 * fields for sb_last_nonzero
85 #define XR_SB_COUNTERS 0x0001
86 #define XR_SB_INOALIGN 0x0002
87 #define XR_SB_SALIGN 0x0004
90 * what got modified by verify_set_* routines
96 #define XR_AG_SB_SEC 0x8