xfs: cull unnecessary icdinode fields

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Now that the struct xfs_icdinode is not directly related to the
on-disk format, we can cull things in it we really don't need to
store:

	- magic number never changes
	- padding is not necessary
	- next_unlinked is never used
	- inode number is redundant
	- uuid is redundant
	- lsn is accessed directly from dinode
	- inode CRC is only accessed directly from dinode

Hence we can remove these from the struct xfs_icdinode and redirect
the code that uses them to the xfs_dinode appripriately.  This
reduces the size of the struct icdinode from 152 bytes to 88 bytes,
and removes a fair chunk of unnecessary code, too.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

...

This commit is contained in:

Dave Chinner 2016-02-09 16:54:58 +11:00 • committed by Dave Chinner

parent 3987848c7c

commit 93f958f9c4

4 changed files with 31 additions and 71 deletions

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39

fs/xfs/libxfs/xfs_inode_buf.c

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25

fs/xfs/libxfs/xfs_inode_buf.h

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19

fs/xfs/xfs_inode.c

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19

fs/xfs/xfs_inode_item.c

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