On Wed, Nov 01, 2023 at 08:56:30AM -0700, Darrick J. Wong wrote: > On Wed, Nov 01, 2023 at 02:45:43PM +0800, Zorro Lang wrote: > > On Mon, Oct 30, 2023 at 02:00:15PM -0700, Omar Sandoval wrote: > > > This is a regression test for patch "xfs: fix internal error from AGFL > > > exhaustion"), which is not yet merged. Without the fix, it will fail > > > with a "Structure needs cleaning" error. > > > > > > Signed-off-by: Omar Sandoval <osandov@xxxxxxxxxxx> > > > --- > > > Changes since v1 [1]: > > > > > > - Fixed to check whether mkfs.xfs supports -m rmapbt. > > > - Changed bare $XFS_DB calls to _scratch_xfs_db. > > > - Expanded comment about what happens without the fix. > > > > > > I didn't add a check for whether everything ended up in AG 0, because it > > > wasn't clear to me what to do in that case. We could skip the test, but > > > it also doesn't hurt to run it anyways. > > > > > > 1: https://lore.kernel.org/linux-xfs/c7be2fe66a297316b934ddd3a1368b14f39a9f22.1698190540.git.osandov@xxxxxxxxxxx/ > > > > > > tests/xfs/601 | 68 +++++++++++++++++++++++++++++++++++++++++++++++ > > > tests/xfs/601.out | 2 ++ > > > > The xfs/601 has been taken by: > > 39f88c55 ("generic: test FALLOC_FL_UNSHARE when pagecache is not loaded") > > > > I'll change this case to another number. > > > > ... > > Hi Darrick, I just noticed that commit has "generic", but that's a case in > > tests/xfs, and there's not "_supported_fs xfs" in xfs/601. Do you want to > > move it to be a generic case? > > Yes, the existing xfs/601 regression test (kernel commit 35d30c9cf127) > can become a generic test; and then this one can take its place. If you need to move current xfs/601 to generic/, better to have another patch. I'll merge this patch in xfs/ at first. Then you can do that moving in your next "random fix" patchset, or I can send a patch to do that. Thanks, Zorro > > --D > > > > 2 files changed, 70 insertions(+) > > > create mode 100755 tests/xfs/601 > > > create mode 100644 tests/xfs/601.out > > > > > > diff --git a/tests/xfs/601 b/tests/xfs/601 > > > new file mode 100755 > > > index 00000000..68df6ac0 > > > --- /dev/null > > > +++ b/tests/xfs/601 > > > @@ -0,0 +1,68 @@ > > > +#! /bin/bash > > > +# SPDX-License-Identifier: GPL-2.0 > > > +# Copyright (c) Meta Platforms, Inc. and affiliates. > > > +# > > > +# FS QA Test 601 > > > +# > > > +# Regression test for patch "xfs: fix internal error from AGFL exhaustion". > > > +# > > > +. ./common/preamble > > > +_begin_fstest auto prealloc punch > > > + > > > +. ./common/filter > > > + > > > +_supported_fs xfs > > > +_require_scratch > > > > _require_xfs_io_command "fpunch" ? > > > > I can help to add that, others look good to me. > > > > Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx> > > > > > +_require_test_program punch-alternating > > > +_fixed_by_kernel_commit XXXXXXXXXXXX "xfs: fix internal error from AGFL exhaustion" > > > + > > > +# Disable the rmapbt so we only need to worry about splitting the bnobt and > > > +# cntbt at the same time. > > > +opts= > > > +if $MKFS_XFS_PROG |& grep -q rmapbt; then > > > + opts="-m rmapbt=0" > > > +fi > > > +_scratch_mkfs $opts | _filter_mkfs > /dev/null 2> "$tmp.mkfs" > > > +. "$tmp.mkfs" > > > +_scratch_mount > > > + > > > +alloc_block_len=$((_fs_has_crcs ? 56 : 16)) > > > +allocbt_leaf_maxrecs=$(((dbsize - alloc_block_len) / 8)) > > > +allocbt_node_maxrecs=$(((dbsize - alloc_block_len) / 12)) > > > + > > > +# Create a big file with a size such that the punches below create the exact > > > +# free extents we want. > > > +num_holes=$((allocbt_leaf_maxrecs * allocbt_node_maxrecs - 1)) > > > +$XFS_IO_PROG -c "falloc 0 $((9 * dbsize + num_holes * dbsize * 2))" -f "$SCRATCH_MNT/big" > > > + > > > +# Fill in any small free extents in AG 0. After this, there should be only one, > > > +# large free extent. > > > +_scratch_unmount > > > +mapfile -t gaps < <(_scratch_xfs_db -c 'agf 0' -c 'addr cntroot' -c btdump | > > > + $SED_PROG -rn 's/^[0-9]+:\[[0-9]+,([0-9]+)\].*/\1/p' | > > > + tac | tail -n +2) > > > +_scratch_mount > > > +for gap_i in "${!gaps[@]}"; do > > > + gap=${gaps[$gap_i]} > > > + $XFS_IO_PROG -c "falloc 0 $((gap * dbsize))" -f "$SCRATCH_MNT/gap$gap_i" > > > +done > > > + > > > +# Create enough free space records to make the bnobt and cntbt both full, > > > +# 2-level trees, plus one more record to make them split all the way to the > > > +# root and become 3-level trees. After this, there is a 7-block free extent in > > > +# the rightmost leaf of the cntbt, and all of the leaves of the cntbt other > > > +# than the rightmost two are full. Without the fix, the free list is also > > > +# empty. > > > +$XFS_IO_PROG -c "fpunch $dbsize $((7 * dbsize))" "$SCRATCH_MNT/big" > > > +"$here/src/punch-alternating" -o 9 "$SCRATCH_MNT/big" > > > + > > > +# Do an arbitrary operation that refills the free list. Without the fix, this > > > +# will allocate 6 blocks from the 7-block free extent in the rightmost leaf of > > > +# the cntbt, then try to insert the remaining 1 block free extent in the > > > +# leftmost leaf of the cntbt. But that leaf is full, so this tries to split the > > > +# leaf and fails because the free list is empty, returning EFSCORRUPTED. > > > +$XFS_IO_PROG -c "fpunch 0 $dbsize" "$SCRATCH_MNT/big" > > > + > > > +echo "Silence is golden" > > > +status=0 > > > +exit > > > diff --git a/tests/xfs/601.out b/tests/xfs/601.out > > > new file mode 100644 > > > index 00000000..0d70c3e5 > > > --- /dev/null > > > +++ b/tests/xfs/601.out > > > @@ -0,0 +1,2 @@ > > > +QA output created by 601 > > > +Silence is golden > > > -- > > > 2.41.0 > > > > > > > > > > >
