Commit b64f3a39 authored by Dave Chinner's avatar Dave Chinner Committed by Ben Myers
Browse files

xfs: use btree block initialisation functions in growfs 



Factor xfs_btree_init_block() to be independent of the btree cursor,
and use the function to initialise btree blocks in the growfs code.
This makes adding support for different format btree blocks simple.

Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by Rich Johnston <rjohnston@sgi.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent ee73259b

fs/xfs/xfs_btree.c

+24 −9
Original line number Diff line number Diff line
@@ -853,18 +853,22 @@ xfs_btree_set_sibling( 
	}

}



STATIC void

void

xfs_btree_init_block(

	struct xfs_btree_cur	*cur,

	int			level,

	int			numrecs,

	struct xfs_btree_block	*new)	/* new block */

	struct xfs_mount *mp,

	struct xfs_buf	*bp,

	__u32		magic,

	__u16		level,

	__u16		numrecs,

	unsigned int	flags)

{

	new->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]);

	struct xfs_btree_block	*new = XFS_BUF_TO_BLOCK(bp);



	new->bb_magic = cpu_to_be32(magic);

	new->bb_level = cpu_to_be16(level);

	new->bb_numrecs = cpu_to_be16(numrecs);



	if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {

	if (flags & XFS_BTREE_LONG_PTRS) {

		new->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);

		new->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);

	} else {
@@ -873,6 +877,17 @@ xfs_btree_init_block( 
	}

}



STATIC void

xfs_btree_init_block_cur(

	struct xfs_btree_cur	*cur,

	int			level,

	int			numrecs,

	struct xfs_buf		*bp)

{

	xfs_btree_init_block(cur->bc_mp, bp, xfs_magics[cur->bc_btnum],

			       level, numrecs, cur->bc_flags);

}



/*

 * Return true if ptr is the last record in the btree and

 * we need to track updateѕ to this record.  The decision
@@ -2183,7 +2198,7 @@ xfs_btree_split( 
		goto error0;



	/* Fill in the btree header for the new right block. */

	xfs_btree_init_block(cur, xfs_btree_get_level(left), 0, right);

	xfs_btree_init_block_cur(cur, xfs_btree_get_level(left), 0, rbp);



	/*

	 * Split the entries between the old and the new block evenly.
@@ -2492,7 +2507,7 @@ xfs_btree_new_root( 
		nptr = 2;

	}

	/* Fill in the new block's btree header and log it. */

	xfs_btree_init_block(cur, cur->bc_nlevels, 2, new);

	xfs_btree_init_block_cur(cur, cur->bc_nlevels, 2, nbp);

	xfs_btree_log_block(cur, nbp, XFS_BB_ALL_BITS);

	ASSERT(!xfs_btree_ptr_is_null(cur, &lptr) &&

			!xfs_btree_ptr_is_null(cur, &rptr));

fs/xfs/xfs_btree.h

+11 −0
Original line number Diff line number Diff line
@@ -378,6 +378,17 @@ xfs_btree_reada_bufs( 
	xfs_agblock_t		agbno,	/* allocation group block number */

	xfs_extlen_t		count);	/* count of filesystem blocks */



/*

 * Initialise a new btree block header

 */

void

xfs_btree_init_block(

	struct xfs_mount *mp,

	struct xfs_buf	*bp,

	__u32		magic,

	__u16		level,

	__u16		numrecs,

	unsigned int	flags);



/*

 * Common btree core entry points.

fs/xfs/xfs_fsops.c

+13 −24
Original line number Diff line number Diff line
@@ -125,7 +125,6 @@ xfs_growfs_data_private( 
	xfs_extlen_t		agsize;

	xfs_extlen_t		tmpsize;

	xfs_alloc_rec_t		*arec;

	struct xfs_btree_block	*block;

	xfs_buf_t		*bp;

	int			bucket;

	int			dpct;
@@ -263,17 +262,14 @@ xfs_growfs_data_private( 
			error = ENOMEM;

			goto error0;

		}

		block = XFS_BUF_TO_BLOCK(bp);

		memset(block, 0, mp->m_sb.sb_blocksize);

		block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);

		block->bb_level = 0;

		block->bb_numrecs = cpu_to_be16(1);

		block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);

		block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);

		arec = XFS_ALLOC_REC_ADDR(mp, block, 1);

		xfs_buf_zero(bp, 0, BBTOB(bp->b_length));

		xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0);



		arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);

		arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));

		arec->ar_blockcount = cpu_to_be32(

			agsize - be32_to_cpu(arec->ar_startblock));



		error = xfs_bwrite(bp);

		xfs_buf_relse(bp);

		if (error)
@@ -289,18 +285,15 @@ xfs_growfs_data_private( 
			error = ENOMEM;

			goto error0;

		}

		block = XFS_BUF_TO_BLOCK(bp);

		memset(block, 0, mp->m_sb.sb_blocksize);

		block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);

		block->bb_level = 0;

		block->bb_numrecs = cpu_to_be16(1);

		block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);

		block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);

		arec = XFS_ALLOC_REC_ADDR(mp, block, 1);

		xfs_buf_zero(bp, 0, BBTOB(bp->b_length));

		xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0);



		arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);

		arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));

		arec->ar_blockcount = cpu_to_be32(

			agsize - be32_to_cpu(arec->ar_startblock));

		nfree += be32_to_cpu(arec->ar_blockcount);



		error = xfs_bwrite(bp);

		xfs_buf_relse(bp);

		if (error)
@@ -316,13 +309,9 @@ xfs_growfs_data_private( 
			error = ENOMEM;

			goto error0;

		}

		block = XFS_BUF_TO_BLOCK(bp);

		memset(block, 0, mp->m_sb.sb_blocksize);

		block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);

		block->bb_level = 0;

		block->bb_numrecs = 0;

		block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);

		block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);

		xfs_buf_zero(bp, 0, BBTOB(bp->b_length));

		xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0);



		error = xfs_bwrite(bp);

		xfs_buf_relse(bp);

		if (error)

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