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 ++ 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
