xfs: remove XFS_BMAP_TRACE_EXLIST

Instead of looping over all extents in some debug-only helper just
insert trace points into the loops that already exist in the calling
functions.

Also split the xfs_extlist trace point into one each for reading and
writing extents from disk.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/libxfs/xfs_bmap.c

@@ -487,26 +487,6 @@ xfs_bmap_check_leaf_extents(
 	return;
 }
 
-/*
- * Add bmap trace insert entries for all the contents of the extent records.
- */
-void
-xfs_bmap_trace_exlist(
-	xfs_inode_t	*ip,		/* incore inode pointer */
-	xfs_extnum_t	cnt,		/* count of entries in the list */
-	int		whichfork,	/* data or attr or cow fork */
-	unsigned long	caller_ip)
-{
-	xfs_extnum_t	idx;		/* extent record index */
-	xfs_ifork_t	*ifp;		/* inode fork pointer */
-	int		state = xfs_bmap_fork_to_state(whichfork);
-
-	ifp = XFS_IFORK_PTR(ip, whichfork);
-	ASSERT(cnt == xfs_iext_count(ifp));
-	for (idx = 0; idx < cnt; idx++)
-		trace_xfs_extlist(ip, idx, state, caller_ip);
-}
-
 /*
  * Validate that the bmbt_irecs being returned from bmapi are valid
  * given the caller's original parameters.  Specifically check the
@@ -1210,6 +1190,7 @@ xfs_bmap_read_extents(
 	__be64			*pp;	/* pointer to block address */
 	/* REFERENCED */
 	xfs_extnum_t		room;	/* number of entries there's room for */
+	int			state = xfs_bmap_fork_to_state(whichfork);
 
 	mp = ip->i_mount;
 	ifp = XFS_IFORK_PTR(ip, whichfork);
@@ -1283,6 +1264,7 @@ xfs_bmap_read_extents(
 						 XFS_ERRLEVEL_LOW, mp);
 				goto error0;
 			}
+			trace_xfs_read_extent(ip, i, state, _THIS_IP_);
 		}
 		xfs_trans_brelse(tp, bp);
 		bno = nextbno;
@@ -1300,7 +1282,6 @@ xfs_bmap_read_extents(
 	if (i != XFS_IFORK_NEXTENTS(ip, whichfork))
 		return -EFSCORRUPTED;
 	ASSERT(i == xfs_iext_count(ifp));
-	XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
 	return 0;
 error0:
 	xfs_trans_brelse(tp, bp);

fs/xfs/libxfs/xfs_bmap.h

@@ -197,15 +197,6 @@ enum shift_direction {
 	SHIFT_RIGHT,
 };
 
-#ifdef DEBUG
-void	xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
-		int whichfork, unsigned long caller_ip);
-#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)	\
-	xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)
-#else
-#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)
-#endif
-
 void	xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
 		xfs_filblks_t len);
 void	xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);

fs/xfs/libxfs/xfs_inode_fork.c

@@ -336,6 +336,7 @@ xfs_iformat_extents(
 {
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
+	int			state = xfs_bmap_fork_to_state(whichfork);
 	int			nex = XFS_DFORK_NEXTENTS(dip, whichfork);
 	int			size = nex * sizeof(xfs_bmbt_rec_t);
 	struct xfs_bmbt_rec	*dp;
@@ -373,8 +374,8 @@ xfs_iformat_extents(
 						 XFS_ERRLEVEL_LOW, mp);
 				return -EFSCORRUPTED;
 			}
+			trace_xfs_read_extent(ip, i, state, _THIS_IP_);
 		}
-		XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork);
 	}
 	ifp->if_flags |= XFS_IFEXTENTS;
 	return 0;
@@ -772,6 +773,7 @@ xfs_iextents_copy(
 	xfs_bmbt_rec_t		*dp,
 	int			whichfork)
 {
+	int			state = xfs_bmap_fork_to_state(whichfork);
 	int			copied;
 	int			i;
 	xfs_ifork_t		*ifp;
@@ -783,7 +785,6 @@ xfs_iextents_copy(
 	ASSERT(ifp->if_bytes > 0);
 
 	nrecs = xfs_iext_count(ifp);
-	XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork);
 	ASSERT(nrecs > 0);
 
 	/*
@@ -806,9 +807,12 @@ xfs_iextents_copy(
 			continue;
 		}
 
+		trace_xfs_write_extent(ip, i, state, _RET_IP_);
+
 		/* Translate to on disk format */
 		put_unaligned_be64(ep->l0, &dp->l0);
 		put_unaligned_be64(ep->l1, &dp->l1);
+
 		dp++;
 		copied++;
 	}

fs/xfs/xfs_trace.h

@@ -309,7 +309,8 @@ DEFINE_EVENT(xfs_bmap_class, name, \
 DEFINE_BMAP_EVENT(xfs_iext_remove);
 DEFINE_BMAP_EVENT(xfs_bmap_pre_update);
 DEFINE_BMAP_EVENT(xfs_bmap_post_update);
-DEFINE_BMAP_EVENT(xfs_extlist);
+DEFINE_BMAP_EVENT(xfs_read_extent);
+DEFINE_BMAP_EVENT(xfs_write_extent);
 
 DECLARE_EVENT_CLASS(xfs_buf_class,
 	TP_PROTO(struct xfs_buf *bp, unsigned long caller_ip),