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Commit de497688 authored by Dave Chinner's avatar Dave Chinner Committed by Ben Myers
Browse files

xfs: make growfs initialise the AGFL header 



For verification purposes, AGFLs need to be initialised to a known
set of values. For upcoming CRC changes, they are also headers that
need to be initialised. Currently, growfs does neither for the AGFLs
- it ignores them completely. Add initialisation of the AGFL to be
full of invalid block numbers (NULLAGBLOCK) to put the
infrastructure in place needed for CRC support.

Includes a comment clarification from Jeff Liu.

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 fd23683c

fs/xfs/xfs_fsops.c

+22 −1
Original line number Diff line number Diff line
@@ -140,6 +140,7 @@ xfs_growfs_data_private( 
	xfs_growfs_data_t	*in)		/* growfs data input struct */

{

	xfs_agf_t		*agf;

	struct xfs_agfl		*agfl;

	xfs_agi_t		*agi;

	xfs_agnumber_t		agno;

	xfs_extlen_t		agsize;
@@ -207,7 +208,7 @@ xfs_growfs_data_private( 
	nfree = 0;

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

		/*

		 * AG freelist header block

		 * AG freespace header block

		 */

		bp = xfs_growfs_get_hdr_buf(mp,

				XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
@@ -243,6 +244,26 @@ xfs_growfs_data_private( 
		if (error)

			goto error0;



		/*

		 * 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);

		if (!bp) {

			error = ENOMEM;

			goto error0;

		}



		agfl = XFS_BUF_TO_AGFL(bp);

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

			agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);



		error = xfs_bwrite(bp);

		xfs_buf_relse(bp);

		if (error)

			goto error0;



		/*

		 * AG inode header block

		 */