Commit ac4fef69 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: add refcount btree support to growfs 



Modify the growfs code to initialize new refcount btree blocks.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 1946b91c

fs/xfs/xfs_fsops.c

+39 −0
Original line number Diff line number Diff line
@@ -259,6 +259,12 @@ xfs_growfs_data_private( 
		agf->agf_longest = cpu_to_be32(tmpsize);

		if (xfs_sb_version_hascrc(&mp->m_sb))

			uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);

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

			agf->agf_refcount_root = cpu_to_be32(

					xfs_refc_block(mp));

			agf->agf_refcount_level = cpu_to_be32(1);

			agf->agf_refcount_blocks = cpu_to_be32(1);

		}



		error = xfs_bwrite(bp);

		xfs_buf_relse(bp);
@@ -450,6 +456,17 @@ xfs_growfs_data_private( 
			rrec->rm_offset = 0;

			be16_add_cpu(&block->bb_numrecs, 1);



			/* 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);

			}



			error = xfs_bwrite(bp);

			xfs_buf_relse(bp);

			if (error)
@@ -507,6 +524,28 @@ xfs_growfs_data_private( 
				goto error0;

		}



		/*

		 * 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,

				&xfs_refcountbt_buf_ops);

			if (!bp) {

				error = -ENOMEM;

				goto error0;

			}



			xfs_btree_init_block(mp, bp, XFS_REFC_CRC_MAGIC,

					     0, 0, agno,

					     XFS_BTREE_CRC_BLOCKS);



			error = xfs_bwrite(bp);

			xfs_buf_relse(bp);

			if (error)

				goto error0;

		}

	}

	xfs_trans_agblocks_delta(tp, nfree);

	/*