xfs: refactor eofb matching into a single helper

Refactor the two eofb-matching logics into a single helper so that we
don't repeat ourselves.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/xfs_icache.c

@@ -1456,6 +1456,36 @@ xfs_inode_match_id_union(
 	return 0;
 }
 
+/*
+ * Is this inode @ip eligible for eof/cow block reclamation, given some
+ * filtering parameters @eofb?  The inode is eligible if @eofb is null or
+ * if the predicate functions match.
+ */
+static bool
+xfs_inode_matches_eofb(
+	struct xfs_inode	*ip,
+	struct xfs_eofblocks	*eofb)
+{
+	int			match;
+
+	if (!eofb)
+		return true;
+
+	if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
+		match = xfs_inode_match_id_union(ip, eofb);
+	else
+		match = xfs_inode_match_id(ip, eofb);
+	if (!match)
+		return false;
+
+	/* skip the inode if the file size is too small */
+	if ((eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) &&
+	    XFS_ISIZE(ip) < eofb->eof_min_file_size)
+		return false;
+
+	return true;
+}
+
 STATIC int
 xfs_inode_free_eofblocks(
 	struct xfs_inode	*ip,
@@ -1463,7 +1493,6 @@ xfs_inode_free_eofblocks(
 {
 	struct xfs_eofblocks	*eofb = args;
 	bool			wait;
-	int			match;
 	int			ret;
 
 	wait = eofb && (eofb->eof_flags & XFS_EOF_FLAGS_SYNC);
@@ -1482,19 +1511,8 @@ xfs_inode_free_eofblocks(
 	if (!wait && mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
 		return 0;
 
-	if (eofb) {
-		if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
-			match = xfs_inode_match_id_union(ip, eofb);
-		else
-			match = xfs_inode_match_id(ip, eofb);
-		if (!match)
-			return 0;
-
-		/* skip the inode if the file size is too small */
-		if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
-		    XFS_ISIZE(ip) < eofb->eof_min_file_size)
+	if (!xfs_inode_matches_eofb(ip, eofb))
 		return 0;
-	}
 
 	/*
 	 * If the caller is waiting, return -EAGAIN to keep the background
@@ -1737,26 +1755,14 @@ xfs_inode_free_cowblocks(
 	void			*args)
 {
 	struct xfs_eofblocks	*eofb = args;
-	int			match;
 	int			ret = 0;
 
 	if (!xfs_prep_free_cowblocks(ip))
 		return 0;
 
-	if (eofb) {
-		if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
-			match = xfs_inode_match_id_union(ip, eofb);
-		else
-			match = xfs_inode_match_id(ip, eofb);
-		if (!match)
+	if (!xfs_inode_matches_eofb(ip, eofb))
 		return 0;
 
-		/* skip the inode if the file size is too small */
-		if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
-		    XFS_ISIZE(ip) < eofb->eof_min_file_size)
-			return 0;
-	}
-
 	/* Free the CoW blocks */
 	xfs_ilock(ip, XFS_IOLOCK_EXCL);
 	xfs_ilock(ip, XFS_MMAPLOCK_EXCL);