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Commit 0410c3bb authored by Dave Chinner's avatar Dave Chinner Committed by Darrick J. Wong
Browse files

xfs: factor ag btree root block initialisation 



Cookie cutter code, easily factored.

Signed-Off-By: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent 9aebe805

fs/xfs/xfs_fsops.c

+259 −222
Original line number Diff line number Diff line
@@ -71,46 +71,140 @@ xfs_growfs_get_hdr_buf( 
	return bp;

}



struct aghdr_init_data {

	/* per ag data */

	xfs_agnumber_t		agno;		/* ag to init */

	xfs_extlen_t		agsize;		/* new AG size */

	struct list_head	buffer_list;	/* buffer writeback list */

	xfs_rfsblock_t		nfree;		/* cumulative new free space */



	/* per header data */

	xfs_daddr_t		daddr;		/* header location */

	size_t			numblks;	/* size of header */

	xfs_btnum_t		type;		/* type of btree root block */

};



/*

 * Write new AG headers to disk. Non-transactional, but written

 * synchronously so they are completed prior to the growfs transaction

 * being logged.

 * Generic btree root block init function

 */

static int

xfs_grow_ag_headers(

static void

xfs_btroot_init(

	struct xfs_mount	*mp,

	xfs_agnumber_t		agno,

	xfs_extlen_t		agsize,

	xfs_rfsblock_t		*nfree,

	struct list_head	*buffer_list)

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_agf		*agf;

	struct xfs_agi		*agi;

	struct xfs_agfl		*agfl;

	__be32			*agfl_bno;

	xfs_alloc_rec_t		*arec;

	struct xfs_buf		*bp;

	int			bucket;

	xfs_extlen_t		tmpsize;

	int			error = 0;

	xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno, 0);

}



/*

	 * AG freespace header block

 * Alloc btree root block init functions

 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),

			XFS_FSS_TO_BB(mp, 1), 0,

			&xfs_agf_buf_ops);

	if (!bp) {

		error = -ENOMEM;

		goto out_error;

static void

xfs_bnoroot_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_alloc_rec	*arec;



	xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno, 0);

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

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

	arec->ar_blockcount = cpu_to_be32(id->agsize -

					  be32_to_cpu(arec->ar_startblock));

}



	agf = XFS_BUF_TO_AGF(bp);

static void

xfs_cntroot_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_alloc_rec	*arec;



	xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno, 0);

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

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

	arec->ar_blockcount = cpu_to_be32(id->agsize -

					  be32_to_cpu(arec->ar_startblock));

}



/*

 * Reverse map root block init

 */

static void

xfs_rmaproot_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);

	struct xfs_rmap_rec	*rrec;



	xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno, 0);



	/*

	 * mark the AG header regions as static metadata The BNO

	 * btree block is the first block after the headers, so

	 * it's location defines the size of region the static

	 * metadata consumes.

	 *

	 * Note: unlike mkfs, we never have to account for log

	 * space when growing the data regions

	 */

	rrec = XFS_RMAP_REC_ADDR(block, 1);

	rrec->rm_startblock = 0;

	rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));

	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);

	rrec->rm_offset = 0;



	/* account freespace btree root blocks */

	rrec = XFS_RMAP_REC_ADDR(block, 2);

	rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));

	rrec->rm_blockcount = cpu_to_be32(2);

	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);

	rrec->rm_offset = 0;



	/* account inode btree root blocks */

	rrec = XFS_RMAP_REC_ADDR(block, 3);

	rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));

	rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -

					  XFS_IBT_BLOCK(mp));

	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);

	rrec->rm_offset = 0;



	/* account for rmap btree root */

	rrec = XFS_RMAP_REC_ADDR(block, 4);

	rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));

	rrec->rm_blockcount = cpu_to_be32(1);

	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);

	rrec->rm_offset = 0;



	/* account for refc btree root */

	if (xfs_sb_version_hasreflink(&mp->m_sb)) {

		rrec = XFS_RMAP_REC_ADDR(block, 5);

		rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp));

		rrec->rm_blockcount = cpu_to_be32(1);

		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);

		rrec->rm_offset = 0;

		be16_add_cpu(&block->bb_numrecs, 1);

	}

}





static void

xfs_agfblock_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_agf		*agf = XFS_BUF_TO_AGF(bp);

	xfs_extlen_t		tmpsize;



	agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);

	agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);

	agf->agf_seqno = cpu_to_be32(agno);

	agf->agf_length = cpu_to_be32(agsize);

	agf->agf_seqno = cpu_to_be32(id->agno);

	agf->agf_length = cpu_to_be32(id->agsize);

	agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));

	agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));

	agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
@@ -125,7 +219,7 @@ xfs_grow_ag_headers( 
	agf->agf_flfirst = cpu_to_be32(1);

	agf->agf_fllast = 0;

	agf->agf_flcount = 0;

	tmpsize = agsize - mp->m_ag_prealloc_blocks;

	tmpsize = id->agsize - mp->m_ag_prealloc_blocks;

	agf->agf_freeblks = cpu_to_be32(tmpsize);

	agf->agf_longest = cpu_to_be32(tmpsize);

	if (xfs_sb_version_hascrc(&mp->m_sb))
@@ -136,52 +230,42 @@ xfs_grow_ag_headers( 
		agf->agf_refcount_level = cpu_to_be32(1);

		agf->agf_refcount_blocks = cpu_to_be32(1);

	}

	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_relse(bp);



	/*

	 * AG freelist header block

	 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),

			XFS_FSS_TO_BB(mp, 1), 0,

			&xfs_agfl_buf_ops);

	if (!bp) {

		error = -ENOMEM;

		goto out_error;

}



	agfl = XFS_BUF_TO_AGFL(bp);

static void

xfs_agflblock_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_agfl		*agfl = XFS_BUF_TO_AGFL(bp);

	__be32			*agfl_bno;

	int			bucket;



	if (xfs_sb_version_hascrc(&mp->m_sb)) {

		agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);

		agfl->agfl_seqno = cpu_to_be32(agno);

		agfl->agfl_seqno = cpu_to_be32(id->agno);

		uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);

	}



	agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);

	for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)

		agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);



	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_relse(bp);



	/*

	 * AG inode header block

	 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),

			XFS_FSS_TO_BB(mp, 1), 0,

			&xfs_agi_buf_ops);

	if (!bp) {

		error = -ENOMEM;

		goto out_error;

}



	agi = XFS_BUF_TO_AGI(bp);

static void

xfs_agiblock_init(

	struct xfs_mount	*mp,

	struct xfs_buf		*bp,

	struct aghdr_init_data	*id)

{

	struct xfs_agi		*agi = XFS_BUF_TO_AGI(bp);

	int			bucket;



	agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);

	agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);

	agi->agi_seqno = cpu_to_be32(agno);

	agi->agi_length = cpu_to_be32(agsize);

	agi->agi_seqno = cpu_to_be32(id->agno);

	agi->agi_length = cpu_to_be32(id->agsize);

	agi->agi_count = 0;

	agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));

	agi->agi_level = cpu_to_be32(1);
@@ -196,182 +280,135 @@ xfs_grow_ag_headers( 
	}

	for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)

		agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);

}



	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_relse(bp);



	/*

	 * BNO btree root block

	 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

			&xfs_allocbt_buf_ops);

static int

xfs_growfs_init_aghdr(

	struct xfs_mount	*mp,

	struct aghdr_init_data	*id,

	void			(*work)(struct xfs_mount *, struct xfs_buf *,

					struct aghdr_init_data *),

	const struct xfs_buf_ops *ops)



	if (!bp) {

		error = -ENOMEM;

		goto out_error;

	}

{

	struct xfs_buf		*bp;



	xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, agno, 0);

	bp = xfs_growfs_get_hdr_buf(mp, id->daddr, id->numblks, 0, ops);

	if (!bp)

		return -ENOMEM;



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

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

	arec->ar_blockcount = cpu_to_be32(

		agsize - be32_to_cpu(arec->ar_startblock));

	(*work)(mp, bp, id);



	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_delwri_queue(bp, &id->buffer_list);

	xfs_buf_relse(bp);

	return 0;

}



/*

	 * CNT btree root block

 * Write new AG headers to disk. Non-transactional, but written

 * synchronously so they are completed prior to the growfs transaction

 * being logged.

 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

			&xfs_allocbt_buf_ops);

	if (!bp) {

		error = -ENOMEM;

		goto out_error;

	}



	xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, agno, 0);



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

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

	arec->ar_blockcount = cpu_to_be32(

		agsize - be32_to_cpu(arec->ar_startblock));

	*nfree += be32_to_cpu(arec->ar_blockcount);

static int

xfs_grow_ag_headers(

	struct xfs_mount	*mp,

	struct aghdr_init_data	*id)



	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_relse(bp);

{

	int			error = 0;



	/* RMAP btree root block */

	if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {

		struct xfs_rmap_rec	*rrec;

		struct xfs_btree_block	*block;

	/* Account for AG free space in new AG */

	id->nfree += id->agsize - mp->m_ag_prealloc_blocks;



		bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, XFS_RMAP_BLOCK(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

			&xfs_rmapbt_buf_ops);

		if (!bp) {

			error = -ENOMEM;

	/* AG freespace header block */

	id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp));

	id->numblks = XFS_FSS_TO_BB(mp, 1);

	error = xfs_growfs_init_aghdr(mp, id, xfs_agfblock_init,

					&xfs_agf_buf_ops);

	if (error)

		goto out_error;

		}



		xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 0,

					agno, 0);

		block = XFS_BUF_TO_BLOCK(bp);

	/* AG freelist header block */

	id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp));

	id->numblks = XFS_FSS_TO_BB(mp, 1);

	error = xfs_growfs_init_aghdr(mp, id, xfs_agflblock_init,

					&xfs_agfl_buf_ops);

	if (error)

		goto out_error;



	/* AG inode header block */

	id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp));

	id->numblks = XFS_FSS_TO_BB(mp, 1);

	error = xfs_growfs_init_aghdr(mp, id, xfs_agiblock_init,

					&xfs_agi_buf_ops);

	if (error)

		goto out_error;



		/*

		 * mark the AG header regions as static metadata The BNO

		 * btree block is the first block after the headers, so

		 * it's location defines the size of region the static

		 * metadata consumes.

		 *

		 * Note: unlike mkfs, we never have to account for log

		 * space when growing the data regions

		 */

		rrec = XFS_RMAP_REC_ADDR(block, 1);

		rrec->rm_startblock = 0;

		rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));

		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);

		rrec->rm_offset = 0;

		be16_add_cpu(&block->bb_numrecs, 1);



		/* account freespace btree root blocks */

		rrec = XFS_RMAP_REC_ADDR(block, 2);

		rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));

		rrec->rm_blockcount = cpu_to_be32(2);

		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);

		rrec->rm_offset = 0;

		be16_add_cpu(&block->bb_numrecs, 1);

	/* BNO btree root block */

	id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp));

	id->numblks = BTOBB(mp->m_sb.sb_blocksize);

	error = xfs_growfs_init_aghdr(mp, id, xfs_bnoroot_init,

				   &xfs_allocbt_buf_ops);

	if (error)

		goto out_error;



		/* account inode btree root blocks */

		rrec = XFS_RMAP_REC_ADDR(block, 3);

		rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));

		rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -

						XFS_IBT_BLOCK(mp));

		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);

		rrec->rm_offset = 0;

		be16_add_cpu(&block->bb_numrecs, 1);



		/* account for rmap btree root */

		rrec = XFS_RMAP_REC_ADDR(block, 4);

		rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));

		rrec->rm_blockcount = cpu_to_be32(1);

		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);

		rrec->rm_offset = 0;

		be16_add_cpu(&block->bb_numrecs, 1);

	/* CNT btree root block */

	id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp));

	id->numblks = BTOBB(mp->m_sb.sb_blocksize);

	error = xfs_growfs_init_aghdr(mp, id, xfs_cntroot_init,

				   &xfs_allocbt_buf_ops);

	if (error)

		goto out_error;



		/* account for refc btree root */

		if (xfs_sb_version_hasreflink(&mp->m_sb)) {

			rrec = XFS_RMAP_REC_ADDR(block, 5);

			rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp));

			rrec->rm_blockcount = cpu_to_be32(1);

			rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);

			rrec->rm_offset = 0;

			be16_add_cpu(&block->bb_numrecs, 1);

		}

	/* RMAP btree root block */

	if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {

		id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp));

		id->numblks = BTOBB(mp->m_sb.sb_blocksize);

		error = xfs_growfs_init_aghdr(mp, id, xfs_rmaproot_init,

					   &xfs_rmapbt_buf_ops);

		if (error)

			goto out_error;



		xfs_buf_delwri_queue(bp, buffer_list);

		xfs_buf_relse(bp);

	}



	/*

	 * INO btree root block

	 */

	bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

	/* INO btree root block */

	id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp));

	id->numblks = BTOBB(mp->m_sb.sb_blocksize);

	id->type = XFS_BTNUM_INO;

	error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,

				   &xfs_inobt_buf_ops);

	if (!bp) {

		error = -ENOMEM;

	if (error)

		goto out_error;

	}



	xfs_btree_init_block(mp, bp, XFS_BTNUM_INO , 0, 0, agno, 0);

	xfs_buf_delwri_queue(bp, buffer_list);

	xfs_buf_relse(bp);



	/*

	 * FINO btree root block

	 */

	if (xfs_sb_version_hasfinobt(&mp->m_sb)) {

		bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

		id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp));

		id->numblks = BTOBB(mp->m_sb.sb_blocksize);

		id->type = XFS_BTNUM_FINO;

		error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,

					   &xfs_inobt_buf_ops);

		if (!bp) {

			error = -ENOMEM;

		if (error)

			goto out_error;

	}



		xfs_btree_init_block(mp, bp, XFS_BTNUM_FINO, 0, 0, agno, 0);

		xfs_buf_delwri_queue(bp, buffer_list);

		xfs_buf_relse(bp);

	}



	/*

	 * refcount btree root block

	 */

	if (xfs_sb_version_hasreflink(&mp->m_sb)) {

		bp = xfs_growfs_get_hdr_buf(mp,

			XFS_AGB_TO_DADDR(mp, agno, xfs_refc_block(mp)),

			BTOBB(mp->m_sb.sb_blocksize), 0,

		id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp));

		id->numblks = BTOBB(mp->m_sb.sb_blocksize);

		id->type = XFS_BTNUM_REFC;

		error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,

					   &xfs_refcountbt_buf_ops);

		if (!bp) {

			error = -ENOMEM;

		if (error)

			goto out_error;

	}



		xfs_btree_init_block(mp, bp, XFS_BTNUM_REFC, 0, 0, agno, 0);

		xfs_buf_delwri_queue(bp, buffer_list);

		xfs_buf_relse(bp);

	}



out_error:

	return error;

}
@@ -384,7 +421,6 @@ xfs_growfs_data_private( 
	xfs_agf_t		*agf;

	xfs_agi_t		*agi;

	xfs_agnumber_t		agno;

	xfs_extlen_t		agsize;

	xfs_buf_t		*bp;

	int			dpct;

	int			error, saved_error = 0;
@@ -392,11 +428,11 @@ xfs_growfs_data_private( 
	xfs_agnumber_t		nagimax = 0;

	xfs_rfsblock_t		nb, nb_mod;

	xfs_rfsblock_t		new;

	xfs_rfsblock_t		nfree;

	xfs_agnumber_t		oagcount;

	int			pct;

	xfs_trans_t		*tp;

	LIST_HEAD		(buffer_list);

	struct aghdr_init_data	id = {};



	nb = in->newblocks;

	pct = in->imaxpct;
@@ -448,27 +484,28 @@ xfs_growfs_data_private( 
	 * list to write, we can cancel the entire list without having written

	 * anything.

	 */

	nfree = 0;

	for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {



		if (agno == nagcount - 1)

			agsize = nb -

				(agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);

	INIT_LIST_HEAD(&id.buffer_list);

	for (id.agno = nagcount - 1;

	     id.agno >= oagcount;

	     id.agno--, new -= id.agsize) {



		if (id.agno == nagcount - 1)

			id.agsize = nb -

				(id.agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);

		else

			agsize = mp->m_sb.sb_agblocks;

			id.agsize = mp->m_sb.sb_agblocks;



		error = xfs_grow_ag_headers(mp, agno, agsize, &nfree,

					    &buffer_list);

		error = xfs_grow_ag_headers(mp, &id);

		if (error) {

			xfs_buf_delwri_cancel(&buffer_list);

			xfs_buf_delwri_cancel(&id.buffer_list);

			goto error0;

		}

	}

	error = xfs_buf_delwri_submit(&buffer_list);

	error = xfs_buf_delwri_submit(&id.buffer_list);

	if (error)

		goto error0;



	xfs_trans_agblocks_delta(tp, nfree);

	xfs_trans_agblocks_delta(tp, id.nfree);



	/*

	 * There are new blocks in the old last a.g.
@@ -479,7 +516,7 @@ xfs_growfs_data_private( 
		/*

		 * Change the agi length.

		 */

		error = xfs_ialloc_read_agi(mp, tp, agno, &bp);

		error = xfs_ialloc_read_agi(mp, tp, id.agno, &bp);

		if (error) {

			goto error0;

		}
@@ -492,7 +529,7 @@ xfs_growfs_data_private( 
		/*

		 * Change agf length.

		 */

		error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);

		error = xfs_alloc_read_agf(mp, tp, id.agno, 0, &bp);

		if (error) {

			goto error0;

		}
@@ -511,13 +548,13 @@ xfs_growfs_data_private( 
		 * this doesn't actually exist in the rmap btree.

		 */

		xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL);

		error = xfs_rmap_free(tp, bp, agno,

		error = xfs_rmap_free(tp, bp, id.agno,

				be32_to_cpu(agf->agf_length) - new,

				new, &oinfo);

		if (error)

			goto error0;

		error = xfs_free_extent(tp,

				XFS_AGB_TO_FSB(mp, agno,

				XFS_AGB_TO_FSB(mp, id.agno,

					be32_to_cpu(agf->agf_length) - new),

				new, &oinfo, XFS_AG_RESV_NONE);

		if (error)
@@ -534,8 +571,8 @@ xfs_growfs_data_private( 
	if (nb > mp->m_sb.sb_dblocks)

		xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,

				 nb - mp->m_sb.sb_dblocks);

	if (nfree)

		xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);

	if (id.nfree)

		xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, id.nfree);

	if (dpct)

		xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);

	xfs_trans_set_sync(tp);
@@ -562,7 +599,7 @@ xfs_growfs_data_private( 
	if (new) {

		struct xfs_perag	*pag;



		pag = xfs_perag_get(mp, agno);

		pag = xfs_perag_get(mp, id.agno);

		error = xfs_ag_resv_free(pag);

		xfs_perag_put(pag);

		if (error)