xfs: call xfs_bmap_exact_minlen_extent_alloc from xfs_bmap_btalloc

xfs_bmap_exact_minlen_extent_alloc duplicates the args setup in
xfs_bmap_btalloc.  Switch to call it from xfs_bmap_btalloc after
doing the basic setup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

fs/xfs/libxfs/xfs_bmap.c

@@ -3479,28 +3479,17 @@ xfs_bmap_process_allocated_extent(
 
 static int
 xfs_bmap_exact_minlen_extent_alloc(
-	struct xfs_bmalloca	*ap)
+	struct xfs_bmalloca	*ap,
+	struct xfs_alloc_arg	*args)
 {
-	struct xfs_mount	*mp = ap->ip->i_mount;
-	struct xfs_alloc_arg	args = { .tp = ap->tp, .mp = mp };
-	xfs_fileoff_t		orig_offset;
-	xfs_extlen_t		orig_length;
-	int			error;
-
-	ASSERT(ap->length);
-
 	if (ap->minlen != 1) {
-		ap->blkno = NULLFSBLOCK;
-		ap->length = 0;
+		args->fsbno = NULLFSBLOCK;
 		return 0;
 	}
 
-	orig_offset = ap->offset;
-	orig_length = ap->length;
-
-	args.alloc_minlen_only = 1;
-
-	xfs_bmap_compute_alignments(ap, &args);
+	args->alloc_minlen_only = 1;
+	args->minlen = args->maxlen = ap->minlen;
+	args->total = ap->total;
 
 	/*
 	 * Unlike the longest extent available in an AG, we don't track
@@ -3510,33 +3499,9 @@ xfs_bmap_exact_minlen_extent_alloc(
 	 * we need not be concerned about a drop in performance in
 	 * "debug only" code paths.
 	 */
-	ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0);
+	ap->blkno = XFS_AGB_TO_FSB(ap->ip->i_mount, 0, 0);
 
-	args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE;
-	args.minlen = args.maxlen = ap->minlen;
-	args.total = ap->total;
-
-	args.alignment = 1;
-	args.minalignslop = 0;
-
-	args.minleft = ap->minleft;
-	args.wasdel = ap->wasdel;
-	args.resv = XFS_AG_RESV_NONE;
-	args.datatype = ap->datatype;
-
-	error = xfs_alloc_vextent_first_ag(&args, ap->blkno);
-	if (error)
-		return error;
-
-	if (args.fsbno != NULLFSBLOCK) {
-		xfs_bmap_process_allocated_extent(ap, &args, orig_offset,
-			orig_length);
-	} else {
-		ap->blkno = NULLFSBLOCK;
-		ap->length = 0;
-	}
-
-	return 0;
+	return xfs_alloc_vextent_first_ag(args, ap->blkno);
 }
 
 /*
@@ -3795,8 +3760,11 @@ xfs_bmap_btalloc(
 	/* Trim the allocation back to the maximum an AG can fit. */
 	args.maxlen = min(ap->length, mp->m_ag_max_usable);
 
-	if ((ap->datatype & XFS_ALLOC_USERDATA) &&
-	    xfs_inode_is_filestream(ap->ip))
+	if (unlikely(XFS_TEST_ERROR(false, mp,
+			XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT)))
+		error = xfs_bmap_exact_minlen_extent_alloc(ap, &args);
+	else if ((ap->datatype & XFS_ALLOC_USERDATA) &&
+			xfs_inode_is_filestream(ap->ip))
 		error = xfs_bmap_btalloc_filestreams(ap, &args, stripe_align);
 	else
 		error = xfs_bmap_btalloc_best_length(ap, &args, stripe_align);
@@ -4211,9 +4179,6 @@ xfs_bmapi_allocate(
 	if ((bma->datatype & XFS_ALLOC_USERDATA) &&
 	    XFS_IS_REALTIME_INODE(bma->ip))
 		error = xfs_bmap_rtalloc(bma);
-	else if (unlikely(XFS_TEST_ERROR(false, mp,
-			XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT)))
-		error = xfs_bmap_exact_minlen_extent_alloc(bma);
 	else
 		error = xfs_bmap_btalloc(bma);
 	if (error)