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> Looks good now, Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --D > --- > 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 ++ > 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_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 >
