Commit eb77b23b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Darrick J. Wong
Browse files

xfs: add a xfs_valid_startblock helper 



Add a helper that validates the startblock is valid.  This checks for a
non-zero block on the main device, but skips that check for blocks on
the realtime device.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent 1baa2800

fs/xfs/libxfs/xfs_bmap.c

+1 −1
Original line number Diff line number Diff line
@@ -4515,7 +4515,7 @@ xfs_bmapi_convert_delalloc( 
	if (WARN_ON_ONCE(bma.blkno == NULLFSBLOCK))

		goto out_finish;

	error = -EFSCORRUPTED;

	if (WARN_ON_ONCE(!bma.got.br_startblock && !XFS_IS_REALTIME_INODE(ip)))

	if (WARN_ON_ONCE(!xfs_valid_startblock(ip, bma.got.br_startblock)))

		goto out_finish;



	XFS_STATS_ADD(mp, xs_xstrat_bytes, XFS_FSB_TO_B(mp, bma.length));

fs/xfs/libxfs/xfs_bmap.h

+7 −0
Original line number Diff line number Diff line
@@ -171,6 +171,13 @@ static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec) 
		!isnullstartblock(irec->br_startblock);

}



/*

 * Check the mapping for obviously garbage allocations that could trash the

 * filesystem immediately.

 */

#define xfs_valid_startblock(ip, startblock) \

	((startblock) != 0 || XFS_IS_REALTIME_INODE(ip))



void	xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,

		xfs_filblks_t len);

int	xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);

fs/xfs/xfs_iomap.c

+3 −3
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ xfs_bmbt_to_iomap( 
{

	struct xfs_mount	*mp = ip->i_mount;



	if (unlikely(!imap->br_startblock && !XFS_IS_REALTIME_INODE(ip)))

	if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock)))

		return xfs_alert_fsblock_zero(ip, imap);



	if (imap->br_startblock == HOLESTARTBLOCK) {
@@ -297,7 +297,7 @@ xfs_iomap_write_direct( 
		goto out_unlock;

	}



	if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip)))

	if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock)))

		error = xfs_alert_fsblock_zero(ip, imap);



out_unlock:
@@ -814,7 +814,7 @@ xfs_iomap_write_unwritten( 
		if (error)

			return error;



		if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))

		if (unlikely(!xfs_valid_startblock(ip, imap.br_startblock)))

			return xfs_alert_fsblock_zero(ip, &imap);



		if ((numblks_fsb = imap.br_blockcount) == 0) {

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