Commit abf09233 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Dave Chinner
Browse files

xfs: add rmap btree insert and delete helpers 



Add a couple of helper functions to encapsulate rmap btree insert and
delete operations.  Add tracepoints to the update function.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent fb7d9267

fs/xfs/libxfs/xfs_rmap.c

+46 −1
Original line number Diff line number Diff line
@@ -92,13 +92,58 @@ xfs_rmap_update( 
	struct xfs_rmap_irec	*irec)

{

	union xfs_btree_rec	rec;

	int			error;



	trace_xfs_rmap_update(cur->bc_mp, cur->bc_private.a.agno,

			irec->rm_startblock, irec->rm_blockcount,

			irec->rm_owner, irec->rm_offset, irec->rm_flags);



	rec.rmap.rm_startblock = cpu_to_be32(irec->rm_startblock);

	rec.rmap.rm_blockcount = cpu_to_be32(irec->rm_blockcount);

	rec.rmap.rm_owner = cpu_to_be64(irec->rm_owner);

	rec.rmap.rm_offset = cpu_to_be64(

			xfs_rmap_irec_offset_pack(irec));

	return xfs_btree_update(cur, &rec);

	error = xfs_btree_update(cur, &rec);

	if (error)

		trace_xfs_rmap_update_error(cur->bc_mp,

				cur->bc_private.a.agno, error, _RET_IP_);

	return error;

}



int

xfs_rmap_insert(

	struct xfs_btree_cur	*rcur,

	xfs_agblock_t		agbno,

	xfs_extlen_t		len,

	uint64_t		owner,

	uint64_t		offset,

	unsigned int		flags)

{

	int			i;

	int			error;



	trace_xfs_rmap_insert(rcur->bc_mp, rcur->bc_private.a.agno, agbno,

			len, owner, offset, flags);



	error = xfs_rmap_lookup_eq(rcur, agbno, len, owner, offset, flags, &i);

	if (error)

		goto done;

	XFS_WANT_CORRUPTED_GOTO(rcur->bc_mp, i == 0, done);



	rcur->bc_rec.r.rm_startblock = agbno;

	rcur->bc_rec.r.rm_blockcount = len;

	rcur->bc_rec.r.rm_owner = owner;

	rcur->bc_rec.r.rm_offset = offset;

	rcur->bc_rec.r.rm_flags = flags;

	error = xfs_btree_insert(rcur, &i);

	if (error)

		goto done;

	XFS_WANT_CORRUPTED_GOTO(rcur->bc_mp, i == 1, done);

done:

	if (error)

		trace_xfs_rmap_insert_error(rcur->bc_mp,

				rcur->bc_private.a.agno, error, _RET_IP_);

	return error;

}



static int

fs/xfs/libxfs/xfs_rmap.h

+3 −0
Original line number Diff line number Diff line
@@ -148,6 +148,9 @@ int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, 
int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,

		xfs_extlen_t len, uint64_t owner, uint64_t offset,

		unsigned int flags, int *stat);

int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,

		xfs_extlen_t len, uint64_t owner, uint64_t offset,

		unsigned int flags);

int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,

		int *stat);

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