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Commit 62aab20f authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: adjust refcount when unmapping file blocks 



When we're unmapping blocks from a reflinked file, decrease the
refcount of the affected blocks and free the extents that are no
longer in use.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 33ba6129

fs/xfs/libxfs/xfs_bmap.c

+11 −3
Original line number Original line Diff line number Diff line
@@ -48,6 +48,7 @@ 
#include "xfs_filestream.h"

#include "xfs_filestream.h"

#include "xfs_rmap.h"

#include "xfs_rmap.h"

#include "xfs_ag_resv.h"

#include "xfs_ag_resv.h"

#include "xfs_refcount.h"









kmem_zone_t		*xfs_bmap_free_item_zone;

kmem_zone_t		*xfs_bmap_free_item_zone;
@@ -4988,9 +4989,16 @@ xfs_bmap_del_extent( 
	/*

	/*

	 * If we need to, add to list of extents to delete.

	 * If we need to, add to list of extents to delete.

	 */

	 */

	if (do_fx)

	if (do_fx) {

		if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) {

			error = xfs_refcount_decrease_extent(mp, dfops, del);

			if (error)

				goto done;

		} else

			xfs_bmap_add_free(mp, dfops, del->br_startblock,

			xfs_bmap_add_free(mp, dfops, del->br_startblock,

					del->br_blockcount, NULL);

					del->br_blockcount, NULL);

	}



	/*

	/*

	 * Adjust inode # blocks in the file.

	 * Adjust inode # blocks in the file.

	 */

	 */