xfs: remove XFS_IFEXTENTS

The in-memory XFS_IFEXTENTS is now only used to check if an inode with
extents still needs the extents to be read into memory before doing
operations that need the extent map.  Add a new xfs_need_iread_extents
helper that returns true for btree format forks that do not have any
entries in the in-memory extent btree, and use that instead of checking
the XFS_IFEXTENTS flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h
index ac8b2182ce8c..a6f7897b6887 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.h
+++ b/fs/xfs/libxfs/xfs_inode_fork.h
@@ -22,17 +22,11 @@ struct xfs_ifork {
 		char		*if_data;	/* inline file data */
 	} if_u1;
 	short			if_broot_bytes;	/* bytes allocated for root */
-	unsigned char		if_flags;	/* per-fork flags */
 	int8_t			if_format;	/* format of this fork */
 	xfs_extnum_t		if_nextents;	/* # of extents in this fork */
 };
 
 /*
- * Per-fork incore inode flags.
- */
-#define	XFS_IFEXTENTS	0x02	/* All extent pointers are read in */
-
-/*
  * Worst-case increase in the fork extent count when we're adding a single
  * extent to a fork and there's no possibility of splitting an existing mapping.
  */
@@ -236,4 +230,10 @@ int xfs_ifork_verify_local_attr(struct xfs_inode *ip);
 int xfs_iext_count_may_overflow(struct xfs_inode *ip, int whichfork,
 		int nr_to_add);
 
+/* returns true if the fork has extents but they are not read in yet. */
+static inline bool xfs_need_iread_extents(struct xfs_ifork *ifp)
+{
+	return ifp->if_format == XFS_DINODE_FMT_BTREE && ifp->if_height == 0;
+}
+
 #endif	/* __XFS_INODE_FORK_H__ */