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Message-ID: <202303280351.JOvlN1HQ-lkp@intel.com>
Date: Tue, 28 Mar 2023 04:14:34 +0800
From: kernel test robot <lkp@...el.com>
To: Ye Bin <yebin@...weicloud.com>, djwong@...nel.org,
linux-xfs@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Ye Bin <yebin10@...wei.com>
Subject: Re: [PATCH] xfs: fix BUG_ON in xfs_getbmap()
Hi Ye,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xfs-linux/for-next]
[also build test WARNING on linus/master v6.3-rc4 next-20230327]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Ye-Bin/xfs-fix-BUG_ON-in-xfs_getbmap/20230327-220330
base: https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git for-next
patch link: https://lore.kernel.org/r/20230327140218.4154709-1-yebin%40huaweicloud.com
patch subject: [PATCH] xfs: fix BUG_ON in xfs_getbmap()
config: s390-randconfig-r005-20230326 (https://download.01.org/0day-ci/archive/20230328/202303280351.JOvlN1HQ-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/ff0f6481a35ee27471d1511047c34f4885e2f5aa
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Ye-Bin/xfs-fix-BUG_ON-in-xfs_getbmap/20230327-220330
git checkout ff0f6481a35ee27471d1511047c34f4885e2f5aa
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash fs/xfs/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303280351.JOvlN1HQ-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> fs/xfs/xfs_bmap_util.c:581:1: warning: unused label 'out_unlock_iolock' [-Wunused-label]
out_unlock_iolock:
^~~~~~~~~~~~~~~~~~
1 warning generated.
vim +/out_unlock_iolock +581 fs/xfs/xfs_bmap_util.c
f86f403794b144 Darrick J. Wong 2016-10-03 396
6898811459ff52 Dave Chinner 2013-08-12 397 /*
6898811459ff52 Dave Chinner 2013-08-12 398 * Get inode's extents as described in bmv, and format for output.
6898811459ff52 Dave Chinner 2013-08-12 399 * Calls formatter to fill the user's buffer until all extents
6898811459ff52 Dave Chinner 2013-08-12 400 * are mapped, until the passed-in bmv->bmv_count slots have
6898811459ff52 Dave Chinner 2013-08-12 401 * been filled, or until the formatter short-circuits the loop,
6898811459ff52 Dave Chinner 2013-08-12 402 * if it is tracking filled-in extents on its own.
6898811459ff52 Dave Chinner 2013-08-12 403 */
6898811459ff52 Dave Chinner 2013-08-12 404 int /* error code */
6898811459ff52 Dave Chinner 2013-08-12 405 xfs_getbmap(
232b51948b99df Christoph Hellwig 2017-10-17 406 struct xfs_inode *ip,
6898811459ff52 Dave Chinner 2013-08-12 407 struct getbmapx *bmv, /* user bmap structure */
232b51948b99df Christoph Hellwig 2017-10-17 408 struct kgetbmap *out)
6898811459ff52 Dave Chinner 2013-08-12 409 {
abbf9e8a450748 Christoph Hellwig 2017-10-17 410 struct xfs_mount *mp = ip->i_mount;
abbf9e8a450748 Christoph Hellwig 2017-10-17 411 int iflags = bmv->bmv_iflags;
232b51948b99df Christoph Hellwig 2017-10-17 412 int whichfork, lock, error = 0;
abbf9e8a450748 Christoph Hellwig 2017-10-17 413 int64_t bmv_end, max_len;
abbf9e8a450748 Christoph Hellwig 2017-10-17 414 xfs_fileoff_t bno, first_bno;
abbf9e8a450748 Christoph Hellwig 2017-10-17 415 struct xfs_ifork *ifp;
abbf9e8a450748 Christoph Hellwig 2017-10-17 416 struct xfs_bmbt_irec got, rec;
abbf9e8a450748 Christoph Hellwig 2017-10-17 417 xfs_filblks_t len;
b2b1712a640824 Christoph Hellwig 2017-11-03 418 struct xfs_iext_cursor icur;
6898811459ff52 Dave Chinner 2013-08-12 419
232b51948b99df Christoph Hellwig 2017-10-17 420 if (bmv->bmv_iflags & ~BMV_IF_VALID)
232b51948b99df Christoph Hellwig 2017-10-17 421 return -EINVAL;
f86f403794b144 Darrick J. Wong 2016-10-03 422 #ifndef DEBUG
f86f403794b144 Darrick J. Wong 2016-10-03 423 /* Only allow CoW fork queries if we're debugging. */
f86f403794b144 Darrick J. Wong 2016-10-03 424 if (iflags & BMV_IF_COWFORK)
f86f403794b144 Darrick J. Wong 2016-10-03 425 return -EINVAL;
f86f403794b144 Darrick J. Wong 2016-10-03 426 #endif
f86f403794b144 Darrick J. Wong 2016-10-03 427 if ((iflags & BMV_IF_ATTRFORK) && (iflags & BMV_IF_COWFORK))
f86f403794b144 Darrick J. Wong 2016-10-03 428 return -EINVAL;
f86f403794b144 Darrick J. Wong 2016-10-03 429
abbf9e8a450748 Christoph Hellwig 2017-10-17 430 if (bmv->bmv_length < -1)
abbf9e8a450748 Christoph Hellwig 2017-10-17 431 return -EINVAL;
abbf9e8a450748 Christoph Hellwig 2017-10-17 432 bmv->bmv_entries = 0;
abbf9e8a450748 Christoph Hellwig 2017-10-17 433 if (bmv->bmv_length == 0)
abbf9e8a450748 Christoph Hellwig 2017-10-17 434 return 0;
abbf9e8a450748 Christoph Hellwig 2017-10-17 435
f86f403794b144 Darrick J. Wong 2016-10-03 436 if (iflags & BMV_IF_ATTRFORK)
f86f403794b144 Darrick J. Wong 2016-10-03 437 whichfork = XFS_ATTR_FORK;
f86f403794b144 Darrick J. Wong 2016-10-03 438 else if (iflags & BMV_IF_COWFORK)
f86f403794b144 Darrick J. Wong 2016-10-03 439 whichfork = XFS_COW_FORK;
f86f403794b144 Darrick J. Wong 2016-10-03 440 else
f86f403794b144 Darrick J. Wong 2016-10-03 441 whichfork = XFS_DATA_FORK;
f86f403794b144 Darrick J. Wong 2016-10-03 442
abbf9e8a450748 Christoph Hellwig 2017-10-17 443 xfs_ilock(ip, XFS_IOLOCK_SHARED);
f86f403794b144 Darrick J. Wong 2016-10-03 444 switch (whichfork) {
f86f403794b144 Darrick J. Wong 2016-10-03 445 case XFS_ATTR_FORK:
001c179c4e26d0 ChenXiaoSong 2022-07-27 446 lock = xfs_ilock_attr_map_shared(ip);
932b42c66cb5d0 Darrick J. Wong 2022-07-09 447 if (!xfs_inode_has_attr_fork(ip))
001c179c4e26d0 ChenXiaoSong 2022-07-27 448 goto out_unlock_ilock;
6898811459ff52 Dave Chinner 2013-08-12 449
abbf9e8a450748 Christoph Hellwig 2017-10-17 450 max_len = 1LL << 32;
f86f403794b144 Darrick J. Wong 2016-10-03 451 break;
f86f403794b144 Darrick J. Wong 2016-10-03 452 case XFS_COW_FORK:
001c179c4e26d0 ChenXiaoSong 2022-07-27 453 lock = XFS_ILOCK_SHARED;
001c179c4e26d0 ChenXiaoSong 2022-07-27 454 xfs_ilock(ip, lock);
001c179c4e26d0 ChenXiaoSong 2022-07-27 455
abbf9e8a450748 Christoph Hellwig 2017-10-17 456 /* No CoW fork? Just return */
001c179c4e26d0 ChenXiaoSong 2022-07-27 457 if (!xfs_ifork_ptr(ip, whichfork))
001c179c4e26d0 ChenXiaoSong 2022-07-27 458 goto out_unlock_ilock;
f86f403794b144 Darrick J. Wong 2016-10-03 459
abbf9e8a450748 Christoph Hellwig 2017-10-17 460 if (xfs_get_cowextsz_hint(ip))
abbf9e8a450748 Christoph Hellwig 2017-10-17 461 max_len = mp->m_super->s_maxbytes;
abbf9e8a450748 Christoph Hellwig 2017-10-17 462 else
abbf9e8a450748 Christoph Hellwig 2017-10-17 463 max_len = XFS_ISIZE(ip);
f86f403794b144 Darrick J. Wong 2016-10-03 464 break;
f86f403794b144 Darrick J. Wong 2016-10-03 465 case XFS_DATA_FORK:
ff0f6481a35ee2 Ye Bin 2023-03-27 466 lock = XFS_MMAPLOCK_EXCL;
ff0f6481a35ee2 Ye Bin 2023-03-27 467 xfs_ilock(ip, lock);
efa70be1654978 Christoph Hellwig 2013-12-18 468 if (!(iflags & BMV_IF_DELALLOC) &&
13d2c10b05d8e6 Christoph Hellwig 2021-03-29 469 (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_disk_size)) {
2451337dd04390 Dave Chinner 2014-06-25 470 error = filemap_write_and_wait(VFS_I(ip)->i_mapping);
6898811459ff52 Dave Chinner 2013-08-12 471 if (error)
ff0f6481a35ee2 Ye Bin 2023-03-27 472 goto out_unlock_ilock;
efa70be1654978 Christoph Hellwig 2013-12-18 473
6898811459ff52 Dave Chinner 2013-08-12 474 /*
efa70be1654978 Christoph Hellwig 2013-12-18 475 * Even after flushing the inode, there can still be
efa70be1654978 Christoph Hellwig 2013-12-18 476 * delalloc blocks on the inode beyond EOF due to
efa70be1654978 Christoph Hellwig 2013-12-18 477 * speculative preallocation. These are not removed
efa70be1654978 Christoph Hellwig 2013-12-18 478 * until the release function is called or the inode
efa70be1654978 Christoph Hellwig 2013-12-18 479 * is inactivated. Hence we cannot assert here that
efa70be1654978 Christoph Hellwig 2013-12-18 480 * ip->i_delayed_blks == 0.
6898811459ff52 Dave Chinner 2013-08-12 481 */
6898811459ff52 Dave Chinner 2013-08-12 482 }
6898811459ff52 Dave Chinner 2013-08-12 483
abbf9e8a450748 Christoph Hellwig 2017-10-17 484 if (xfs_get_extsz_hint(ip) ||
db07349da2f564 Christoph Hellwig 2021-03-29 485 (ip->i_diflags &
abbf9e8a450748 Christoph Hellwig 2017-10-17 486 (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))
abbf9e8a450748 Christoph Hellwig 2017-10-17 487 max_len = mp->m_super->s_maxbytes;
abbf9e8a450748 Christoph Hellwig 2017-10-17 488 else
abbf9e8a450748 Christoph Hellwig 2017-10-17 489 max_len = XFS_ISIZE(ip);
abbf9e8a450748 Christoph Hellwig 2017-10-17 490
ff0f6481a35ee2 Ye Bin 2023-03-27 491 lock |= xfs_ilock_data_map_shared(ip);
f86f403794b144 Darrick J. Wong 2016-10-03 492 break;
efa70be1654978 Christoph Hellwig 2013-12-18 493 }
6898811459ff52 Dave Chinner 2013-08-12 494
001c179c4e26d0 ChenXiaoSong 2022-07-27 495 ifp = xfs_ifork_ptr(ip, whichfork);
001c179c4e26d0 ChenXiaoSong 2022-07-27 496
f7e67b20ecbbcb Christoph Hellwig 2020-05-18 497 switch (ifp->if_format) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 498 case XFS_DINODE_FMT_EXTENTS:
abbf9e8a450748 Christoph Hellwig 2017-10-17 499 case XFS_DINODE_FMT_BTREE:
abbf9e8a450748 Christoph Hellwig 2017-10-17 500 break;
abbf9e8a450748 Christoph Hellwig 2017-10-17 501 case XFS_DINODE_FMT_LOCAL:
abbf9e8a450748 Christoph Hellwig 2017-10-17 502 /* Local format inode forks report no extents. */
6898811459ff52 Dave Chinner 2013-08-12 503 goto out_unlock_ilock;
abbf9e8a450748 Christoph Hellwig 2017-10-17 504 default:
abbf9e8a450748 Christoph Hellwig 2017-10-17 505 error = -EINVAL;
abbf9e8a450748 Christoph Hellwig 2017-10-17 506 goto out_unlock_ilock;
abbf9e8a450748 Christoph Hellwig 2017-10-17 507 }
6898811459ff52 Dave Chinner 2013-08-12 508
abbf9e8a450748 Christoph Hellwig 2017-10-17 509 if (bmv->bmv_length == -1) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 510 max_len = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, max_len));
abbf9e8a450748 Christoph Hellwig 2017-10-17 511 bmv->bmv_length = max(0LL, max_len - bmv->bmv_offset);
6898811459ff52 Dave Chinner 2013-08-12 512 }
6898811459ff52 Dave Chinner 2013-08-12 513
abbf9e8a450748 Christoph Hellwig 2017-10-17 514 bmv_end = bmv->bmv_offset + bmv->bmv_length;
abbf9e8a450748 Christoph Hellwig 2017-10-17 515
abbf9e8a450748 Christoph Hellwig 2017-10-17 516 first_bno = bno = XFS_BB_TO_FSBT(mp, bmv->bmv_offset);
abbf9e8a450748 Christoph Hellwig 2017-10-17 517 len = XFS_BB_TO_FSB(mp, bmv->bmv_length);
abbf9e8a450748 Christoph Hellwig 2017-10-17 518
abbf9e8a450748 Christoph Hellwig 2017-10-17 519 error = xfs_iread_extents(NULL, ip, whichfork);
6898811459ff52 Dave Chinner 2013-08-12 520 if (error)
abbf9e8a450748 Christoph Hellwig 2017-10-17 521 goto out_unlock_ilock;
6898811459ff52 Dave Chinner 2013-08-12 522
b2b1712a640824 Christoph Hellwig 2017-11-03 523 if (!xfs_iext_lookup_extent(ip, ifp, bno, &icur, &got)) {
6898811459ff52 Dave Chinner 2013-08-12 524 /*
abbf9e8a450748 Christoph Hellwig 2017-10-17 525 * Report a whole-file hole if the delalloc flag is set to
abbf9e8a450748 Christoph Hellwig 2017-10-17 526 * stay compatible with the old implementation.
6898811459ff52 Dave Chinner 2013-08-12 527 */
abbf9e8a450748 Christoph Hellwig 2017-10-17 528 if (iflags & BMV_IF_DELALLOC)
abbf9e8a450748 Christoph Hellwig 2017-10-17 529 xfs_getbmap_report_hole(ip, bmv, out, bmv_end, bno,
abbf9e8a450748 Christoph Hellwig 2017-10-17 530 XFS_B_TO_FSB(mp, XFS_ISIZE(ip)));
abbf9e8a450748 Christoph Hellwig 2017-10-17 531 goto out_unlock_ilock;
6898811459ff52 Dave Chinner 2013-08-12 532 }
6898811459ff52 Dave Chinner 2013-08-12 533
abbf9e8a450748 Christoph Hellwig 2017-10-17 534 while (!xfs_getbmap_full(bmv)) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 535 xfs_trim_extent(&got, first_bno, len);
6898811459ff52 Dave Chinner 2013-08-12 536
6898811459ff52 Dave Chinner 2013-08-12 537 /*
abbf9e8a450748 Christoph Hellwig 2017-10-17 538 * Report an entry for a hole if this extent doesn't directly
abbf9e8a450748 Christoph Hellwig 2017-10-17 539 * follow the previous one.
6898811459ff52 Dave Chinner 2013-08-12 540 */
abbf9e8a450748 Christoph Hellwig 2017-10-17 541 if (got.br_startoff > bno) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 542 xfs_getbmap_report_hole(ip, bmv, out, bmv_end, bno,
abbf9e8a450748 Christoph Hellwig 2017-10-17 543 got.br_startoff);
abbf9e8a450748 Christoph Hellwig 2017-10-17 544 if (xfs_getbmap_full(bmv))
abbf9e8a450748 Christoph Hellwig 2017-10-17 545 break;
6898811459ff52 Dave Chinner 2013-08-12 546 }
6898811459ff52 Dave Chinner 2013-08-12 547
c364b6d0b6cda1 Darrick J. Wong 2017-01-26 548 /*
abbf9e8a450748 Christoph Hellwig 2017-10-17 549 * In order to report shared extents accurately, we report each
abbf9e8a450748 Christoph Hellwig 2017-10-17 550 * distinct shared / unshared part of a single bmbt record with
abbf9e8a450748 Christoph Hellwig 2017-10-17 551 * an individual getbmapx record.
c364b6d0b6cda1 Darrick J. Wong 2017-01-26 552 */
abbf9e8a450748 Christoph Hellwig 2017-10-17 553 bno = got.br_startoff + got.br_blockcount;
abbf9e8a450748 Christoph Hellwig 2017-10-17 554 rec = got;
abbf9e8a450748 Christoph Hellwig 2017-10-17 555 do {
abbf9e8a450748 Christoph Hellwig 2017-10-17 556 error = xfs_getbmap_report_one(ip, bmv, out, bmv_end,
abbf9e8a450748 Christoph Hellwig 2017-10-17 557 &rec);
abbf9e8a450748 Christoph Hellwig 2017-10-17 558 if (error || xfs_getbmap_full(bmv))
abbf9e8a450748 Christoph Hellwig 2017-10-17 559 goto out_unlock_ilock;
abbf9e8a450748 Christoph Hellwig 2017-10-17 560 } while (xfs_getbmap_next_rec(&rec, bno));
abbf9e8a450748 Christoph Hellwig 2017-10-17 561
b2b1712a640824 Christoph Hellwig 2017-11-03 562 if (!xfs_iext_next_extent(ifp, &icur, &got)) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 563 xfs_fileoff_t end = XFS_B_TO_FSB(mp, XFS_ISIZE(ip));
abbf9e8a450748 Christoph Hellwig 2017-10-17 564
abbf9e8a450748 Christoph Hellwig 2017-10-17 565 out[bmv->bmv_entries - 1].bmv_oflags |= BMV_OF_LAST;
abbf9e8a450748 Christoph Hellwig 2017-10-17 566
abbf9e8a450748 Christoph Hellwig 2017-10-17 567 if (whichfork != XFS_ATTR_FORK && bno < end &&
abbf9e8a450748 Christoph Hellwig 2017-10-17 568 !xfs_getbmap_full(bmv)) {
abbf9e8a450748 Christoph Hellwig 2017-10-17 569 xfs_getbmap_report_hole(ip, bmv, out, bmv_end,
abbf9e8a450748 Christoph Hellwig 2017-10-17 570 bno, end);
c364b6d0b6cda1 Darrick J. Wong 2017-01-26 571 }
abbf9e8a450748 Christoph Hellwig 2017-10-17 572 break;
abbf9e8a450748 Christoph Hellwig 2017-10-17 573 }
abbf9e8a450748 Christoph Hellwig 2017-10-17 574
abbf9e8a450748 Christoph Hellwig 2017-10-17 575 if (bno >= first_bno + len)
abbf9e8a450748 Christoph Hellwig 2017-10-17 576 break;
6898811459ff52 Dave Chinner 2013-08-12 577 }
6898811459ff52 Dave Chinner 2013-08-12 578
6898811459ff52 Dave Chinner 2013-08-12 579 out_unlock_ilock:
01f4f3277556d4 Christoph Hellwig 2013-12-06 580 xfs_iunlock(ip, lock);
6898811459ff52 Dave Chinner 2013-08-12 @581 out_unlock_iolock:
6898811459ff52 Dave Chinner 2013-08-12 582 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
6898811459ff52 Dave Chinner 2013-08-12 583 return error;
6898811459ff52 Dave Chinner 2013-08-12 584 }
6898811459ff52 Dave Chinner 2013-08-12 585
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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