Merge tag 'xfs-6.3-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "This batch started with some debugging enhancements to the new
  allocator refactoring that we put in 6.3-rc1 to assist developers in
  rebasing their dev branches.

  As for more serious code changes -- there's a bug fix to make the
  lockless allocator scan the whole filesystem before resorting to the
  locking allocator. We're also adding a selftest for the venerable
  directory/xattr hash function to make sure that it produces consistent
  results so that we can address any fallout as soon as possible.

   - Add a few debugging assertions so that people (me) trying to port
     code to the new allocator functions don't mess up the caller
     requirements

   - Relax some overly cautious lock ordering enforcement in the new
     allocator code, which means that file allocations will locklessly
     scan for the best space they can get before backing off to the
     traditional lock-and-really-get-it behavior

   - Add tracepoints to make it easier to trace the xfs allocator
     behavior

   - Actually test the dir/xattr hash algorithm to make sure it produces
     consistent results across all the platforms XFS supports"

* tag 'xfs-6.3-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: test dir/attr hash when loading module
  xfs: add tracepoints for each of the externally visible allocators
  xfs: walk all AGs if TRYLOCK passed to xfs_alloc_vextent_iterate_ags
  xfs: try to idiot-proof the allocators

fs/xfs/Makefile

@@ -63,6 +63,7 @@ xfs-y				+= xfs_aops.o \
 				   xfs_bmap_util.o \
 				   xfs_bio_io.o \
 				   xfs_buf.o \
+				   xfs_dahash_test.o \
 				   xfs_dir2_readdir.o \
 				   xfs_discard.o \
 				   xfs_error.o \

fs/xfs/libxfs/xfs_alloc.c

@@ -3255,6 +3255,8 @@ xfs_alloc_vextent_finish(
 	XFS_STATS_INC(mp, xs_allocx);
 	XFS_STATS_ADD(mp, xs_allocb, args->len);
 
+	trace_xfs_alloc_vextent_finish(args);
+
 out_drop_perag:
 	if (drop_perag && args->pag) {
 		xfs_perag_rele(args->pag);
@@ -3279,8 +3281,14 @@ xfs_alloc_vextent_this_ag(
 	xfs_agnumber_t		minimum_agno;
 	int			error;
 
+	ASSERT(args->pag != NULL);
+	ASSERT(args->pag->pag_agno == agno);
+
 	args->agno = agno;
 	args->agbno = 0;
+
+	trace_xfs_alloc_vextent_this_ag(args);
+
 	error = xfs_alloc_vextent_check_args(args, XFS_AGB_TO_FSB(mp, agno, 0),
 			&minimum_agno);
 	if (error) {
@@ -3323,11 +3331,14 @@ xfs_alloc_vextent_iterate_ags(
 	uint32_t		flags)
 {
 	struct xfs_mount	*mp = args->mp;
+	xfs_agnumber_t		restart_agno = minimum_agno;
 	xfs_agnumber_t		agno;
 	int			error = 0;
 
+	if (flags & XFS_ALLOC_FLAG_TRYLOCK)
+		restart_agno = 0;
 restart:
-	for_each_perag_wrap_range(mp, start_agno, minimum_agno,
+	for_each_perag_wrap_range(mp, start_agno, restart_agno,
 			mp->m_sb.sb_agcount, agno, args->pag) {
 		args->agno = agno;
 		error = xfs_alloc_vextent_prepare_ag(args);
@@ -3366,6 +3377,7 @@ xfs_alloc_vextent_iterate_ags(
 	 */
 	if (flags) {
 		flags = 0;
+		restart_agno = minimum_agno;
 		goto restart;
 	}
 
@@ -3394,8 +3406,13 @@ xfs_alloc_vextent_start_ag(
 	bool			bump_rotor = false;
 	int			error;
 
+	ASSERT(args->pag == NULL);
+
 	args->agno = NULLAGNUMBER;
 	args->agbno = NULLAGBLOCK;
+
+	trace_xfs_alloc_vextent_first_ag(args);
+
 	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
@@ -3442,8 +3459,13 @@ xfs_alloc_vextent_first_ag(
 	xfs_agnumber_t		start_agno;
 	int			error;
 
+	ASSERT(args->pag == NULL);
+
 	args->agno = NULLAGNUMBER;
 	args->agbno = NULLAGBLOCK;
+
+	trace_xfs_alloc_vextent_start_ag(args);
+
 	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
@@ -3470,8 +3492,14 @@ xfs_alloc_vextent_exact_bno(
 	xfs_agnumber_t		minimum_agno;
 	int			error;
 
+	ASSERT(args->pag != NULL);
+	ASSERT(args->pag->pag_agno == XFS_FSB_TO_AGNO(mp, target));
+
 	args->agno = XFS_FSB_TO_AGNO(mp, target);
 	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
+
+	trace_xfs_alloc_vextent_near_bno(args);
+
 	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
@@ -3502,8 +3530,14 @@ xfs_alloc_vextent_near_bno(
 	bool			needs_perag = args->pag == NULL;
 	int			error;
 
+	if (!needs_perag)
+		ASSERT(args->pag->pag_agno == XFS_FSB_TO_AGNO(mp, target));
+
 	args->agno = XFS_FSB_TO_AGNO(mp, target);
 	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
+
+	trace_xfs_alloc_vextent_exact_bno(args);
+
 	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)

fs/xfs/xfs_dahash_test.c

+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
+#include "xfs_dahash_test.h"
+
+/* 4096 random bytes */
+static uint8_t __initdata __attribute__((__aligned__(8))) test_buf[] =
+{
+	0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30,
+	0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4,
+	0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60,
+	0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c,
+	0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4,
+	0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a,
+	0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a,
+	0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4,
+	0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9,
+	0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4,
+	0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca,
+	0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61,
+	0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e,
+	0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a,
+	0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f,
+	0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd,
+	0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c,
+	0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88,
+	0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53,
+	0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f,
+	0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4,
+	0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74,
+	0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60,
+	0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09,
+	0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07,
+	0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1,
+	0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f,
+	0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2,
+	0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0,
+	0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95,
+	0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22,
+	0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93,
+	0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86,
+	0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d,
+	0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40,
+	0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b,
+	0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35,
+	0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40,
+	0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63,
+	0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b,
+	0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8,
+	0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72,
+	0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86,
+	0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff,
+	0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed,
+	0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c,
+	0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed,
+	0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30,
+	0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99,
+	0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4,
+	0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80,
+	0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37,
+	0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04,
+	0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e,
+	0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd,
+	0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c,
+	0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09,
+	0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb,
+	0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b,
+	0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53,
+	0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b,
+	0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f,
+	0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff,
+	0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40,
+	0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6,
+	0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb,
+	0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73,
+	0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f,
+	0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4,
+	0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66,
+	0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1,
+	0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80,
+	0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f,
+	0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5,
+	0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7,
+	0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce,
+	0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff,
+	0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48,
+	0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26,
+	0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72,
+	0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88,
+	0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9,
+	0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc,
+	0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8,
+	0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09,
+	0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8,
+	0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c,
+	0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48,
+	0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d,
+	0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f,
+	0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae,
+	0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97,
+	0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8,
+	0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75,
+	0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc,
+	0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27,
+	0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf,
+	0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7,
+	0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0,
+	0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8,
+	0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c,
+	0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44,
+	0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54,
+	0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38,
+	0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f,
+	0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b,
+	0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7,
+	0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef,
+	0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e,
+	0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c,
+	0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c,
+	0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0,
+	0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37,
+	0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf,
+	0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e,
+	0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4,
+	0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60,
+	0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe,
+	0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61,
+	0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3,
+	0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe,
+	0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40,
+	0x5d, 0x1b, 0x7f, 0x39, 0xb5, 0x9c, 0x35, 0xec,
+	0x61, 0x15, 0x32, 0x32, 0xb8, 0x4e, 0x40, 0x9f,
+	0x17, 0x1f, 0x0a, 0x4d, 0xa9, 0x91, 0xef, 0xb7,
+	0xb0, 0xeb, 0xc2, 0x83, 0x9a, 0x6c, 0xd2, 0x79,
+	0x43, 0x78, 0x5e, 0x2f, 0xe5, 0xdd, 0x1a, 0x3c,
+	0x45, 0xab, 0x29, 0x40, 0x3a, 0x37, 0x5b, 0x6f,
+	0xd7, 0xfc, 0x48, 0x64, 0x3c, 0x49, 0xfb, 0x21,
+	0xbe, 0xc3, 0xff, 0x07, 0xfb, 0x17, 0xe9, 0xc9,
+	0x0c, 0x4c, 0x5c, 0x15, 0x9e, 0x8e, 0x22, 0x30,
+	0x0a, 0xde, 0x48, 0x7f, 0xdb, 0x0d, 0xd1, 0x2b,
+	0x87, 0x38, 0x9e, 0xcc, 0x5a, 0x01, 0x16, 0xee,
+	0x75, 0x49, 0x0d, 0x30, 0x01, 0x34, 0x6a, 0xb6,
+	0x9a, 0x5a, 0x2a, 0xec, 0xbb, 0x48, 0xac, 0xd3,
+	0x77, 0x83, 0xd8, 0x08, 0x86, 0x4f, 0x48, 0x09,
+	0x29, 0x41, 0x79, 0xa1, 0x03, 0x12, 0xc4, 0xcd,
+	0x90, 0x55, 0x47, 0x66, 0x74, 0x9a, 0xcc, 0x4f,
+	0x35, 0x8c, 0xd6, 0x98, 0xef, 0xeb, 0x45, 0xb9,
+	0x9a, 0x26, 0x2f, 0x39, 0xa5, 0x70, 0x6d, 0xfc,
+	0xb4, 0x51, 0xee, 0xf4, 0x9c, 0xe7, 0x38, 0x59,
+	0xad, 0xf4, 0xbc, 0x46, 0xff, 0x46, 0x8e, 0x60,
+	0x9c, 0xa3, 0x60, 0x1d, 0xf8, 0x26, 0x72, 0xf5,
+	0x72, 0x9d, 0x68, 0x80, 0x04, 0xf6, 0x0b, 0xa1,
+	0x0a, 0xd5, 0xa7, 0x82, 0x3a, 0x3e, 0x47, 0xa8,
+	0x5a, 0xde, 0x59, 0x4f, 0x7b, 0x07, 0xb3, 0xe9,
+	0x24, 0x19, 0x3d, 0x34, 0x05, 0xec, 0xf1, 0xab,
+	0x6e, 0x64, 0x8f, 0xd3, 0xe6, 0x41, 0x86, 0x80,
+	0x70, 0xe3, 0x8d, 0x60, 0x9c, 0x34, 0x25, 0x01,
+	0x07, 0x4d, 0x19, 0x41, 0x4e, 0x3d, 0x5c, 0x7e,
+	0xa8, 0xf5, 0xcc, 0xd5, 0x7b, 0xe2, 0x7d, 0x3d,
+	0x49, 0x86, 0x7d, 0x07, 0xb7, 0x10, 0xe3, 0x35,
+	0xb8, 0x84, 0x6d, 0x76, 0xab, 0x17, 0xc6, 0x38,
+	0xb4, 0xd3, 0x28, 0x57, 0xad, 0xd3, 0x88, 0x5a,
+	0xda, 0xea, 0xc8, 0x94, 0xcc, 0x37, 0x19, 0xac,
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+	0x20, 0x1e, 0x28, 0x95, 0x18, 0x1b, 0xa4, 0xa0,
+	0xfd, 0xc0, 0x89, 0x72, 0x43, 0xd9, 0x3b, 0x49,
+	0x5a, 0x3f, 0x9d, 0xbf, 0xdb, 0xb4, 0x46, 0xea,
+	0x42, 0x01, 0x77, 0x23, 0x68, 0x95, 0xb6, 0x24,
+	0xb3, 0xa8, 0x6c, 0x28, 0x3b, 0x11, 0x40, 0x7e,
+	0x18, 0x65, 0x6d, 0xd8, 0x24, 0x42, 0x7d, 0x88,
+	0xc0, 0x52, 0xd9, 0x05, 0xe4, 0x95, 0x90, 0x87,
+	0x8c, 0xf4, 0xd0, 0x6b, 0xb9, 0x83, 0x99, 0x34,
+	0x6d, 0xfe, 0x54, 0x40, 0x94, 0x52, 0x21, 0x4f,
+	0x14, 0x25, 0xc5, 0xd6, 0x5e, 0x95, 0xdc, 0x0a,
+	0x2b, 0x89, 0x20, 0x11, 0x84, 0x48, 0xd6, 0x3a,
+	0xcd, 0x5c, 0x24, 0xad, 0x62, 0xe3, 0xb1, 0x93,
+	0x25, 0x8d, 0xcd, 0x7e, 0xfc, 0x27, 0xa3, 0x37,
+	0xfd, 0x84, 0xfc, 0x1b, 0xb2, 0xf1, 0x27, 0x38,
+	0x5a, 0xb7, 0xfc, 0xf2, 0xfa, 0x95, 0x66, 0xd4,
+	0xfb, 0xba, 0xa7, 0xd7, 0xa3, 0x72, 0x69, 0x48,
+	0x48, 0x8c, 0xeb, 0x28, 0x89, 0xfe, 0x33, 0x65,
+	0x5a, 0x36, 0x01, 0x7e, 0x06, 0x79, 0x0a, 0x09,
+	0x3b, 0x74, 0x11, 0x9a, 0x6e, 0xbf, 0xd4, 0x9e,
+	0x58, 0x90, 0x49, 0x4f, 0x4d, 0x08, 0xd4, 0xe5,
+	0x4a, 0x09, 0x21, 0xef, 0x8b, 0xb8, 0x74, 0x3b,
+	0x91, 0xdd, 0x36, 0x85, 0x60, 0x2d, 0xfa, 0xd4,
+	0x45, 0x7b, 0x45, 0x53, 0xf5, 0x47, 0x87, 0x7e,
+	0xa6, 0x37, 0xc8, 0x78, 0x7a, 0x68, 0x9d, 0x8d,
+	0x65, 0x2c, 0x0e, 0x91, 0x5c, 0xa2, 0x60, 0xf0,
+	0x8e, 0x3f, 0xe9, 0x1a, 0xcd, 0xaa, 0xe7, 0xd5,
+	0x77, 0x18, 0xaf, 0xc9, 0xbc, 0x18, 0xea, 0x48,
+	0x1b, 0xfb, 0x22, 0x48, 0x70, 0x16, 0x29, 0x9e,
+	0x5b, 0xc1, 0x2c, 0x66, 0x23, 0xbc, 0xf0, 0x1f,
+	0xef, 0xaf, 0xe4, 0xd6, 0x04, 0x19, 0x82, 0x7a,
+	0x0b, 0xba, 0x4b, 0x46, 0xb1, 0x6a, 0x85, 0x5d,
+	0xb4, 0x73, 0xd6, 0x21, 0xa1, 0x71, 0x60, 0x14,
+	0xee, 0x0a, 0x77, 0xc4, 0x66, 0x2e, 0xf9, 0x69,
+	0x30, 0xaf, 0x41, 0x0b, 0xc8, 0x83, 0x3c, 0x53,
+	0x99, 0x19, 0x27, 0x46, 0xf7, 0x41, 0x6e, 0x56,
+	0xdc, 0x94, 0x28, 0x67, 0x4e, 0xb7, 0x25, 0x48,
+	0x8a, 0xc2, 0xe0, 0x60, 0x96, 0xcc, 0x18, 0xf4,
+	0x84, 0xdd, 0xa7, 0x5e, 0x3e, 0x05, 0x0b, 0x26,
+	0x26, 0xb2, 0x5c, 0x1f, 0x57, 0x1a, 0x04, 0x7e,
+	0x6a, 0xe3, 0x2f, 0xb4, 0x35, 0xb6, 0x38, 0x40,
+	0x40, 0xcd, 0x6f, 0x87, 0x2e, 0xef, 0xa3, 0xd7,
+	0xa9, 0xc2, 0xe8, 0x0d, 0x27, 0xdf, 0x44, 0x62,
+	0x99, 0xa0, 0xfc, 0xcf, 0x81, 0x78, 0xcb, 0xfe,
+	0xe5, 0xa0, 0x03, 0x4e, 0x6c, 0xd7, 0xf4, 0xaf,
+	0x7a, 0xbb, 0x61, 0x82, 0xfe, 0x71, 0x89, 0xb2,
+	0x22, 0x7c, 0x8e, 0x83, 0x04, 0xce, 0xf6, 0x5d,
+	0x84, 0x8f, 0x95, 0x6a, 0x7f, 0xad, 0xfd, 0x32,
+	0x9c, 0x5e, 0xe4, 0x9c, 0x89, 0x60, 0x54, 0xaa,
+	0x96, 0x72, 0xd2, 0xd7, 0x36, 0x85, 0xa9, 0x45,
+	0xd2, 0x2a, 0xa1, 0x81, 0x49, 0x6f, 0x7e, 0x04,
+	0xfa, 0xe2, 0xfe, 0x90, 0x26, 0x77, 0x5a, 0x33,
+	0xb8, 0x04, 0x9a, 0x7a, 0xe6, 0x4c, 0x4f, 0xad,
+	0x72, 0x96, 0x08, 0x28, 0x58, 0x13, 0xf8, 0xc4,
+	0x1c, 0xf0, 0xc3, 0x45, 0x95, 0x49, 0x20, 0x8c,
+	0x9f, 0x39, 0x70, 0xe1, 0x77, 0xfe, 0xd5, 0x4b,
+	0xaf, 0x86, 0xda, 0xef, 0x22, 0x06, 0x83, 0x36,
+	0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa,
+	0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9,
+	0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28,
+	0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b,
+	0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03,
+	0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d,
+	0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff,
+	0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39,
+	0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b,
+	0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2,
+	0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34,
+	0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe,
+	0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0,
+	0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27,
+	0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86,
+	0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90,
+	0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03,
+	0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb,
+	0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57,
+	0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9,
+	0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5,
+	0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16,
+	0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5,
+	0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a,
+	0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d,
+	0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0,
+	0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f,
+	0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48,
+	0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1,
+	0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09,
+	0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51,
+	0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b,
+	0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf,
+	0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe,
+	0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad,
+	0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e,
+	0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57,
+	0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f,
+	0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef,
+	0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8,
+	0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69,
+	0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d,
+	0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59,
+	0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9,
+	0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d,
+	0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea,
+	0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56,
+	0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4,
+	0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8,
+	0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78,
+	0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f,
+	0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4,
+	0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91,
+	0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f,
+	0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c,
+	0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57,
+	0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4,
+	0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23,
+	0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17,
+	0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66,
+	0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39,
+	0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36,
+	0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00,
+	0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7,
+	0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60,
+	0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c,
+	0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e,
+	0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7,
+	0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a,
+	0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d,
+	0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37,
+	0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82,
+	0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8,
+	0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e,
+	0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85,
+	0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98,
+	0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22,
+	0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7,
+	0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49,
+	0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33,
+	0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc,
+	0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8,
+	0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f,
+	0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3,
+	0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98,
+	0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c,
+	0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6,
+	0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc,
+	0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d,
+};
+
+/* 100 test cases */
+static struct dahash_test {
+	uint16_t	start;	/* random 12 bit offset in buf */
+	uint16_t	length;	/* random 8 bit length of test */
+	xfs_dahash_t	dahash;	/* expected dahash result */
+} test[] __initdata =
+{
+	{0x0567, 0x0097, 0x96951389},
+	{0x0869, 0x0055, 0x6455ab4f},
+	{0x0c51, 0x00be, 0x8663afde},
+	{0x044a, 0x00fc, 0x98fbe432},
+	{0x0f29, 0x0079, 0x42371997},
+	{0x08ba, 0x0052, 0x942be4f7},
+	{0x01f2, 0x0013, 0x5262687e},
+	{0x09e3, 0x00e2, 0x8ffb0908},
+	{0x007c, 0x0051, 0xb3158491},
+	{0x0854, 0x001f, 0x83bb20d9},
+	{0x031b, 0x0008, 0x98970bdf},
+	{0x0de7, 0x0027, 0xbfbf6f6c},
+	{0x0f76, 0x0005, 0x906a7105},
+	{0x092e, 0x00d0, 0x86631850},
+	{0x0233, 0x0082, 0xdbdd914e},
+	{0x04c9, 0x0075, 0x5a400a9e},
+	{0x0b66, 0x0099, 0xae128b45},
+	{0x000d, 0x00ed, 0xe61c216a},
+	{0x0a31, 0x003d, 0xf69663b9},
+	{0x00a3, 0x0052, 0x643c39ae},
+	{0x0125, 0x00d5, 0x7c310b0d},
+	{0x0105, 0x004a, 0x06a77e74},
+	{0x0858, 0x008e, 0x265bc739},
+	{0x045e, 0x0095, 0x13d6b192},
+	{0x0dab, 0x003c, 0xc4498704},
+	{0x00cd, 0x00b5, 0x802a4e2d},
+	{0x069b, 0x008c, 0x5df60f71},
+	{0x0454, 0x006c, 0x5f03d8bb},
+	{0x040e, 0x0032, 0x0ce513b5},
+	{0x0874, 0x00e2, 0x6a811fb3},
+	{0x0521, 0x00b4, 0x93296833},
+	{0x0ddc, 0x00cf, 0xf9305338},
+	{0x0a70, 0x0023, 0x239549ea},
+	{0x083e, 0x0027, 0x2d88ba97},
+	{0x0241, 0x00a7, 0xfe0b32e1},
+	{0x0dfc, 0x0096, 0x1a11e815},
+	{0x023e, 0x001e, 0xebc9a1f3},
+	{0x067e, 0x0066, 0xb1067f81},
+	{0x09ea, 0x000e, 0x46fd7247},
+	{0x036b, 0x008c, 0x1a39acdf},
+	{0x078f, 0x0030, 0x964042ab},
+	{0x085c, 0x008f, 0x1829edab},
+	{0x02ec, 0x009f, 0x6aefa72d},
+	{0x043b, 0x00ce, 0x65642ff5},
+	{0x0a32, 0x00b8, 0xbd82759e},
+	{0x0d3c, 0x0087, 0xf4d66d54},
+	{0x09ec, 0x008a, 0x06bfa1ff},
+	{0x0902, 0x0015, 0x755025d2},
+	{0x08fe, 0x000e, 0xf690ce2d},
+	{0x00fb, 0x00dc, 0xe55f1528},
+	{0x0eaa, 0x003a, 0x0fe0a8d7},
+	{0x05fb, 0x0006, 0x86281cfb},
+	{0x0dd1, 0x00a7, 0x60ab51b4},
+	{0x0005, 0x001b, 0xf51d969b},
+	{0x077c, 0x00dd, 0xc2fed268},
+	{0x0575, 0x00f5, 0x432c0b1a},
+	{0x05be, 0x0088, 0x78baa04b},
+	{0x0c89, 0x0068, 0xeda9e428},
+	{0x0f5c, 0x0068, 0xec143c76},
+	{0x06a8, 0x0009, 0xd72651ce},
+	{0x060f, 0x008e, 0x765426cd},
+	{0x07b1, 0x0047, 0x2cfcfa0c},
+	{0x04f1, 0x0041, 0x55b172f9},
+	{0x0e05, 0x00ac, 0x61efde93},
+	{0x0bf7, 0x0097, 0x05b83eee},
+	{0x04e9, 0x00f3, 0x9928223a},
+	{0x023a, 0x0005, 0xdfada9bc},
+	{0x0acb, 0x000e, 0x2217cecd},
+	{0x0148, 0x0060, 0xbc3f7405},
+	{0x0764, 0x0059, 0xcbc201b1},
+	{0x021f, 0x0059, 0x5d6b2256},
+	{0x0f1e, 0x006c, 0xdefeeb45},
+	{0x071c, 0x00b9, 0xb9b59309},
+	{0x0564, 0x0063, 0xae064271},
+	{0x0b14, 0x0044, 0xdb867d9b},
+	{0x0e5a, 0x0055, 0xff06b685},
+	{0x015e, 0x00ba, 0x1115ccbc},
+	{0x0379, 0x00e6, 0x5f4e58dd},
+	{0x013b, 0x0067, 0x4897427e},
+	{0x0e64, 0x0071, 0x7af2b7a4},
+	{0x0a11, 0x0050, 0x92105726},
+	{0x0109, 0x0055, 0xd0d000f9},
+	{0x00aa, 0x0022, 0x815d229d},
+	{0x09ac, 0x004f, 0x02f9d985},
+	{0x0e1b, 0x00ce, 0x5cf92ab4},
+	{0x08af, 0x00d8, 0x17ca72d1},
+	{0x0e33, 0x000a, 0xda2dba6b},
+	{0x0ee3, 0x006a, 0xb00048e5},
+	{0x0648, 0x001a, 0x2364b8cb},
+	{0x0315, 0x0085, 0x0596fd0d},
+	{0x0fbb, 0x003e, 0x298230ca},
+	{0x0422, 0x006a, 0x78ada4ab},
+	{0x04ba, 0x0073, 0xced1fbc2},
+	{0x007d, 0x0061, 0x4b7ff236},
+	{0x070b, 0x00d0, 0x261cf0ae},
+	{0x0c1a, 0x0035, 0x8be92ee2},
+	{0x0af8, 0x0063, 0x824dcf03},
+	{0x08f8, 0x006d, 0xd289710c},
+	{0x021b, 0x00ee, 0x6ac1c41d},
+	{0x05b5, 0x00da, 0x8e52f0e2},
+};
+
+int __init
+xfs_dahash_test(void)
+{
+	unsigned int	i;
+	unsigned int	errors = 0;
+
+	for (i = 0; i < ARRAY_SIZE(test); i++) {
+		xfs_dahash_t	hash;
+
+		hash = xfs_da_hashname(test_buf + test[i].start,
+				test[i].length);
+		if (hash != test[i].dahash)
+			errors++;
+	}
+
+	if (errors) {
+		printk(KERN_ERR "xfs dir/attr hash test failed %u times!",
+				errors);
+		return -ERANGE;
+	}
+
+	return 0;
+}

fs/xfs/xfs_dahash_test.h

+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#ifndef __XFS_DAHASH_TEST_H__
+#define __XFS_DAHASH_TEST_H__
+
+int xfs_dahash_test(void);
+
+#endif /* __XFS_DAHASH_TEST_H__ */
+

fs/xfs/xfs_super.c

@@ -41,6 +41,7 @@
 #include "xfs_attr_item.h"
 #include "xfs_xattr.h"
 #include "xfs_iunlink_item.h"
+#include "xfs_dahash_test.h"
 
 #include <linux/magic.h>
 #include <linux/fs_context.h>
@@ -2286,6 +2287,10 @@ init_xfs_fs(void)
 
 	xfs_check_ondisk_structs();
 
+	error = xfs_dahash_test();
+	if (error)
+		return error;
+
 	printk(KERN_INFO XFS_VERSION_STRING " with "
 			 XFS_BUILD_OPTIONS " enabled\n");
 

fs/xfs/xfs_trace.h

@@ -1883,6 +1883,13 @@ DEFINE_ALLOC_EVENT(xfs_alloc_vextent_noagbp);
 DEFINE_ALLOC_EVENT(xfs_alloc_vextent_loopfailed);
 DEFINE_ALLOC_EVENT(xfs_alloc_vextent_allfailed);
 
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_this_ag);
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_start_ag);
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_first_ag);
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_exact_bno);
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_near_bno);
+DEFINE_ALLOC_EVENT(xfs_alloc_vextent_finish);
+
 TRACE_EVENT(xfs_alloc_cur_check,
 	TP_PROTO(struct xfs_mount *mp, xfs_btnum_t btnum, xfs_agblock_t bno,
 		 xfs_extlen_t len, xfs_extlen_t diff, bool new),