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linux/fs/xfs/xfs_ondisk.h

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xfs: convert to SPDX license tags Remove the verbose license text from XFS files and replace them with SPDX tags. This does not change the license of any of the code, merely refers to the common, up-to-date license files in LICENSES/ This change was mostly scripted. fs/xfs/Makefile and fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected and modified by the following command: for f in `git grep -l "GNU General" fs/xfs/` ; do echo $f cat $f | awk -f hdr.awk > $f.new mv -f $f.new $f done And the hdr.awk script that did the modification (including detecting the difference between GPL-2.0 and GPL-2.0+ licenses) is as follows: $ cat hdr.awk BEGIN { hdr = 1.0 tag = "GPL-2.0" str = "" } /^ \* This program is free software/ { hdr = 2.0; next } /any later version./ { tag = "GPL-2.0+" next } /^ \*\// { if (hdr > 0.0) { print "// SPDX-License-Identifier: " tag print str print $0 str="" hdr = 0.0 next } print $0 next } /^ \* / { if (hdr > 1.0) next if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 next } /^ \*/ { if (hdr > 0.0) next print $0 next } // { if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 } END { } $ Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06 02:42:14 +00:00
// SPDX-License-Identifier: GPL-2.0
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
/*
* Copyright (c) 2016 Oracle.
* All Rights Reserved.
*/
#ifndef __XFS_ONDISK_H
#define __XFS_ONDISK_H
#define XFS_CHECK_STRUCT_SIZE(structname, size) \
BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
#structname ") is wrong, expected " #size)
xfs: check offsets of variable length structures Some of the directory/attr structures contain variable-length objects, so the enclosing structure doesn't have a meaningful fixed size at compile time. We can check the offsets of the members before the variable-length member, so do those. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-06-21 01:53:28 +00:00
#define XFS_CHECK_OFFSET(structname, member, off) \
BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
"XFS: offsetof(" #structname ", " #member ") is wrong, " \
"expected " #off)
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
static inline void __init
xfs_check_ondisk_structs(void)
{
/* ag/file structures */
XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 336);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
xfs: remove the magic numbers in xfs_btree_block-related len macros replace the magic numbers by offsetof(...) and sizeof(...), and add two extra checks on xfs_check_ondisk_structs() [dchinner: renamed header structures to be more descriptive] Signed-off-by: Hou Tao <houtao1@huawei.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-07-20 00:43:11 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
xfs: define the on-disk refcount btree format Start constructing the refcount btree implementation by establishing the on-disk format and everything needed to read, write, and manipulate the refcount btree blocks. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de>
2016-10-03 16:11:18 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
xfs: define the on-disk rmap btree format Originally-From: Dave Chinner <dchinner@redhat.com> Now we have all the surrounding call infrastructure in place, we can start filling out the rmap btree implementation. Start with the on-disk btree format; add everything needed to read, write and manipulate rmap btree blocks. This prepares the way for adding the btree operations implementation. [darrick: record owner and offset info in rmap btree] [darrick: fork, bmbt and unwritten state in rmap btree] [darrick: flags are a separate field in xfs_rmap_irec] [darrick: calculate maxlevels separately] [darrick: move the 'unwritten' bit into unused parts of rm_offset] Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-08-03 01:36:07 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
xfs: define the on-disk refcount btree format Start constructing the refcount btree implementation by establishing the on-disk format and everything needed to read, write, and manipulate the refcount btree blocks. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de>
2016-10-03 16:11:18 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
xfs: define the on-disk rmap btree format Originally-From: Dave Chinner <dchinner@redhat.com> Now we have all the surrounding call infrastructure in place, we can start filling out the rmap btree implementation. Start with the on-disk btree format; add everything needed to read, write and manipulate rmap btree blocks. This prepares the way for adding the btree operations implementation. [darrick: record owner and offset info in rmap btree] [darrick: fork, bmbt and unwritten state in rmap btree] [darrick: flags are a separate field in xfs_rmap_irec] [darrick: calculate maxlevels separately] [darrick: move the 'unwritten' bit into unused parts of rm_offset] Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-08-03 01:36:07 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
/* dir/attr trees */
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88);
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
/*
* m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
* 4 bytes anyway so it's not obviously a problem. Hence for the moment
* we don't check this structure. This can be re-instated when the attr
* definitions are updated to use c99 VLA definitions.
*
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
*/
xfs: check offsets of variable length structures Some of the directory/attr structures contain variable-length objects, so the enclosing structure doesn't have a meaningful fixed size at compile time. We can check the offsets of the members before the variable-length member, so do those. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-06-21 01:53:28 +00:00
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
xfs: check offsets of variable length structures Some of the directory/attr structures contain variable-length objects, so the enclosing structure doesn't have a meaningful fixed size at compile time. We can check the offsets of the members before the variable-length member, so do those. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-06-21 01:53:28 +00:00
XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize, 0);
XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count, 2);
XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen, 4);
XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags, 6);
XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval, 7);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
xfs: check offsets of variable length structures Some of the directory/attr structures contain variable-length objects, so the enclosing structure doesn't have a meaningful fixed size at compile time. We can check the offsets of the members before the variable-length member, so do those. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-06-21 01:53:28 +00:00
XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
xfs: check offsets of variable length structures Some of the directory/attr structures contain variable-length objects, so the enclosing structure doesn't have a meaningful fixed size at compile time. We can check the offsets of the members before the variable-length member, so do those. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-06-21 01:53:28 +00:00
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
/* log structures */
XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28);
XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32);
XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28);
XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32);
XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
xfs: Don't log uninitialised fields in inode structures Prevent kmemcheck from throwing warnings about reading uninitialised memory when formatting inodes into the incore log buffer. There are several issues here - we don't always log all the fields in the inode log format item, and we never log the inode the di_next_unlinked field. In the case of the inode log format item, this is exacerbated by the old xfs_inode_log_format structure padding issue. Hence make the padded, 64 bit aligned version of the structure the one we always use for formatting the log and get rid of the 64 bit variant. This means we'll always log the 64-bit version and so recovery only needs to convert from the unpadded 32 bit version from older 32 bit kernels. Signed-Off-By: Dave Chinner <dchinner@redhat.com> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-10-09 18:37:22 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
xfs: compile time offset checks for common v4/v5 metadata The v5 superblock format added various metadata fields (such as crc, metadata lsn, owner uuid, etc.) to v4 metadata headers or created new v5 headers for blocks where no such headers existed on v4. Where v4 headers did exist, the v5 structures are careful to place v4 metadata at the original location. For example, the magic value is expected to be at the same location in certain blocks to facilitate version detection. While failure of this invariant is likely to cause severe and obvious problems at runtime, we can detect this condition at compile time via the more recently added on-disk format check infrastructure. Since there is no runtime cost, add some offset checks that start with v5 structure definitions, traverse down to the first bit of common metadata with v4 and ensure that common metadata is at the expected offset. Note that we don't care about blocks which had no v4 header because there is no common metadata in those cases. No functional changes. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-02-08 17:02:29 +00:00
/*
* The v5 superblock format extended several v4 header structures with
* additional data. While new fields are only accessible on v5
* superblocks, it's important that the v5 structures place original v4
* fields/headers in the correct location on-disk. For example, we must
* be able to find magic values at the same location in certain blocks
* regardless of superblock version.
*
* The following checks ensure that various v5 data structures place the
* subset of v4 metadata associated with the same type of block at the
* start of the on-disk block. If there is no data structure definition
* for certain types of v4 blocks, traverse down to the first field of
* common metadata (e.g., magic value) and make sure it is at offset
* zero.
*/
XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
xfs: check sizes of XFS on-disk structures at compile time Check the sizes of XFS on-disk structures when compiling the kernel. Use this to catch inadvertent changes in structure size due to padding and alignment issues, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-03-08 21:15:14 +00:00
}
#endif /* __XFS_ONDISK_H */
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