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Commit 1c4f3329 authored by Alex Elder's avatar Alex Elder
Browse files

xfs: encapsulate a block of debug code 



Pull into a helper function some debug-only code that validates a
xfs_da_blkinfo structure that's been read from disk.

Signed-off-by: default avatarAlex Elder <aelder@sgi.com>
Reviewed-by: default avatarChristoph Hellwig <hch@infradead.org>
parent b0189cd0

fs/xfs/xfs_da_btree.c

+21 −11
Original line number Diff line number Diff line
@@ -692,6 +692,24 @@ xfs_da_join(xfs_da_state_t *state) 
	return(error);

}



#ifdef	DEBUG

static void

xfs_da_blkinfo_onlychild_validate(struct xfs_da_blkinfo *blkinfo, __u16 level)

{

	__be16	magic = blkinfo->magic;



	if (level == 1) {

		ASSERT(magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||

		       magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));

	} else

		ASSERT(magic == cpu_to_be16(XFS_DA_NODE_MAGIC));

	ASSERT(!blkinfo->forw);

	ASSERT(!blkinfo->back);

}

#else	/* !DEBUG */

#define	xfs_da_blkinfo_onlychild_validate(blkinfo, level)

#endif	/* !DEBUG */



/*

 * We have only one entry in the root.  Copy the only remaining child of

 * the old root to block 0 as the new root node.
@@ -700,8 +718,6 @@ STATIC int 
xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk)

{

	xfs_da_intnode_t *oldroot;

	/* REFERENCED */

	xfs_da_blkinfo_t *blkinfo;

	xfs_da_args_t *args;

	xfs_dablk_t child;

	xfs_dabuf_t *bp;
@@ -732,15 +748,9 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk) 
	if (error)

		return(error);

	ASSERT(bp != NULL);

	blkinfo = bp->data;

	if (be16_to_cpu(oldroot->hdr.level) == 1) {

		ASSERT(blkinfo->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||

		       blkinfo->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));

	} else {

		ASSERT(blkinfo->magic == cpu_to_be16(XFS_DA_NODE_MAGIC));

	}

	ASSERT(!blkinfo->forw);

	ASSERT(!blkinfo->back);

	xfs_da_blkinfo_onlychild_validate(bp->data,

					be16_to_cpu(oldroot->hdr.level));



	memcpy(root_blk->bp->data, bp->data, state->blocksize);

	xfs_da_log_buf(args->trans, root_blk->bp, 0, state->blocksize - 1);

	error = xfs_da_shrink_inode(args, child, bp);