From patchwork Wed May 5 21:04:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Burkov X-Patchwork-Id: 12241029 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,LOTS_OF_MONEY,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE1DAC4360C for ; Wed, 5 May 2021 21:04:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE873613E3 for ; Wed, 5 May 2021 21:04:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233129AbhEEVFr (ORCPT ); Wed, 5 May 2021 17:05:47 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:44215 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232878AbhEEVFr (ORCPT ); Wed, 5 May 2021 17:05:47 -0400 Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 9C0875C0156; Wed, 5 May 2021 17:04:49 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Wed, 05 May 2021 17:04:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bur.io; h=from :to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; s=fm3; bh=IgAeioOxlTyqRdXUnVATQBL5fk +20RoZlf5xSSHhEfo=; b=MeFh9KxjmNt+azfi9WLMnJ6Y5AM0LZCs8qmYV4sggO EUMN5IIo6zQg2uGWfecTgwPP1NIo8voRAbRu+bzCPQvaeanBcjmtY9rMrnJJ2tlz H/kbgSr8QwIwvP+CTOpsv6U/BEq8Ps28ClUl0rEfHev8lWHPYo4rd/oHDxqzd9kl XmThRULoygZqoeEmRC1zbPqjT5EG9AoKk4u7TXKztI5iD0R1X8tBbPjG4JSFAktM GMtwtBh3GE6zjQDJ/ornnweHSABr5dM1WuZhoa+a1y6Cv4L+rndQMXgPQT508rW/ hDzWf1eaKRUt05zJxJi+KbHj8V4rPHyii0b1BD8t+eNg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm2; bh=IgAeioOxlTyqRdXUnVATQBL5fk+20RoZlf5xSSHhEfo=; b=wulrc81S +Z1Zy6zUiFr9HkUAkFd1iHxR5Nrq69jsTPZVEc/ybtOq962rhCqeH134rn0P8nFP zr6QFeqxuWgZ8Nz21kUwoLmyjHp2g0rE1D8XX5BzdQMo5zJnMCjFhuTgHBB1yV1m QDrLhJk/gRC6jzpBsFMKMYVHlF5i9/k2AGJhqf1HYo7Kr7vak1OisgXqcOi75gkd ZxdSDvdkc612DlkNe0XM9Wgaf3hqpkxSvt6/bB6z1c0++419MWCtiec88uCS226s JNd1RfdN6Km3uxHxWFlHKvzz8px6fk08ioqVqZi7wub9bLwRy23ected1KFP5Fdc AP/QbQ3WKBIWqw== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrvdefkedgudehvdcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtke ertdertddtnecuhfhrohhmpeeuohhrihhsuceuuhhrkhhovhcuoegsohhrihhssegsuhhr rdhioheqnecuggftrfgrthhtvghrnhepieeuffeuvdeiueejhfehiefgkeevudejjeejff evvdehtddufeeihfekgeeuheelnecukfhppedvtdejrdehfedrvdehfedrjeenucevlhhu shhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegsohhrihhssegsuh hrrdhioh X-ME-Proxy: Received: from localhost (unknown [207.53.253.7]) by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 5 May 2021 17:04:49 -0400 (EDT) From: Boris Burkov To: fstests@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v4 1/4] btrfs: test btrfs specific fsverity corruption Date: Wed, 5 May 2021 14:04:43 -0700 Message-Id: <39a5e3f106db214a2d6416c7fda242c445cc6e53.1620248200.git.boris@bur.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org There are some btrfs specific fsverity scenarios that don't map neatly onto the tests in generic/574 like holes, inline extents, and preallocated extents. Cover those in a btrfs specific test. This test relies on the btrfs implementation of fsverity in the patches titled: btrfs: initial fsverity support btrfs: check verity for reads of inline extents and holes and on btrfs-corrupt-block for corruption in the patches titled: btrfs-progs: corrupt generic item data with btrfs-corrupt-block btrfs-progs: expand corrupt_file_extent in btrfs-corrupt-block Signed-off-by: Boris Burkov --- common/btrfs | 5 ++ common/config | 1 + common/verity | 7 ++ tests/btrfs/290 | 180 ++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/290.out | 25 ++++++ tests/btrfs/group | 1 + 6 files changed, 219 insertions(+) create mode 100755 tests/btrfs/290 create mode 100644 tests/btrfs/290.out diff --git a/common/btrfs b/common/btrfs index ebe6ce26..bd6e87ce 100644 --- a/common/btrfs +++ b/common/btrfs @@ -419,3 +419,8 @@ _btrfs_rescan_devices() { $BTRFS_UTIL_PROG device scan &> /dev/null } + +_require_btrfs_corrupt_block() +{ + _require_command "$BTRFS_CORRUPT_BLOCK_PROG" btrfs_corrupt_block +} diff --git a/common/config b/common/config index a47e462c..003b2a88 100644 --- a/common/config +++ b/common/config @@ -256,6 +256,7 @@ export BTRFS_UTIL_PROG=$(type -P btrfs) export BTRFS_SHOW_SUPER_PROG=$(type -P btrfs-show-super) export BTRFS_CONVERT_PROG=$(type -P btrfs-convert) export BTRFS_TUNE_PROG=$(type -P btrfstune) +export BTRFS_CORRUPT_BLOCK_PROG=$(type -P btrfs-corrupt-block) export XFS_FSR_PROG=$(type -P xfs_fsr) export MKFS_NFS_PROG="false" export MKFS_CIFS_PROG="false" diff --git a/common/verity b/common/verity index 38eea157..d2c1ea24 100644 --- a/common/verity +++ b/common/verity @@ -8,6 +8,10 @@ _require_scratch_verity() _require_scratch _require_command "$FSVERITY_PROG" fsverity + if [ $FSTYP == "btrfs" ]; then + _require_command "$BTRFS_CORRUPT_BLOCK_PROG" btrfs_corrupt_block + fi + if ! _scratch_mkfs_verity &>>$seqres.full; then # ext4: need e2fsprogs v1.44.5 or later (but actually v1.45.2+ # is needed for some tests to pass, due to an e2fsck bug) @@ -147,6 +151,9 @@ _scratch_mkfs_verity() ext4|f2fs) _scratch_mkfs -O verity ;; + btrfs) + _scratch_mkfs + ;; *) _notrun "No verity support for $FSTYP" ;; diff --git a/tests/btrfs/290 b/tests/btrfs/290 new file mode 100755 index 00000000..26939833 --- /dev/null +++ b/tests/btrfs/290 @@ -0,0 +1,180 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 Facebook, Inc. All Rights Reserved. +# +# FS QA Test 290 +# +# Test btrfs support for fsverity. +# This test extends the generic fsverity testing by corrupting inline extents, +# preallocated extents, holes, and the Merkle descriptor in a btrfs-aware way. +# +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/verity + +# remove previous $seqres.full before test +rm -f $seqres.full + +_supported_fs btrfs +_require_scratch_verity +_require_scratch_nocheck +_require_odirect +_require_btrfs_corrupt_block + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +get_ino() { + local file=$1 + stat -c "%i" $file +} + +validate() { + local f=$1 + local sz=$(_get_filesize $f) + # buffered io + echo $(basename $f) + $XFS_IO_PROG -rc "pread -q 0 $sz" $f 2>&1 | _filter_scratch + # direct io + $XFS_IO_PROG -rdc "pread -q 0 $sz" $f 2>&1 | _filter_scratch +} + +# corrupt the data portion of an inline extent +corrupt_inline() { + local f=$SCRATCH_MNT/inl + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 42" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + # inline data starts at disk_bytenr + # overwrite the first u64 with random bogus junk + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f disk_bytenr $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# preallocate a file, then corrupt it by changing it to a regular file +corrupt_prealloc_to_reg() { + local f=$SCRATCH_MNT/prealloc + $XFS_IO_PROG -fc "falloc 0 12k" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + # set extent type from prealloc (2) to reg (1) + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f type -v 1 $SCRATCH_DEV >/dev/null 2>&1 + _scratch_mount + validate $f +} + +# corrupt a regular file by changing the type to preallocated +corrupt_reg_to_prealloc() { + local f=$SCRATCH_MNT/reg + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + # set type from reg (1) to prealloc (2) + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f type -v 2 $SCRATCH_DEV >/dev/null 2>&1 + _scratch_mount + validate $f +} + +# corrupt a file by punching a hole +corrupt_punch_hole() { + local f=$SCRATCH_MNT/punch + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + # make a new extent in the middle, sync so the writes don't coalesce + $XFS_IO_PROG -c sync $SCRATCH_MNT + $XFS_IO_PROG -fc "pwrite -q -S 0x59 4096 4096" $f + _fsv_enable $f + _scratch_unmount + # change disk_bytenr to 0, representing a hole + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 4096 -f disk_bytenr -v 0 $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# plug hole +corrupt_plug_hole() { + local f=$SCRATCH_MNT/plug + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + $XFS_IO_PROG -fc "falloc 4k 4k" $f + _fsv_enable $f + _scratch_unmount + # change disk_bytenr to some value, plugging the hole + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 4096 -f disk_bytenr -v 13639680 $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# corrupt the fsverity descriptor item indiscriminately (causes EINVAL) +corrupt_verity_descriptor() { + local f=$SCRATCH_MNT/desc + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + # key for the descriptor item is , + # 88 is X. So we write 5 Xs to the start of the descriptor + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,36,1 -v 88 -o 0 -b 5 $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# specifically target the root hash in the descriptor (causes EIO) +corrupt_root_hash() { + local f=$SCRATCH_MNT/roothash + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,36,1 -v 88 -o 16 -b 1 $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# corrupt the Merkle tree data itself +corrupt_merkle_tree() { + local f=$SCRATCH_MNT/merkle + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f + local ino=$(get_ino $f) + _fsv_enable $f + _scratch_unmount + # key for the descriptor item is , + # 88 is X. So we write 5 Xs to somewhere in the middle of the first + # merkle item + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,37,0 -v 88 -o 100 -b 5 $SCRATCH_DEV > /dev/null 2>&1 + _scratch_mount + validate $f +} + +# real QA test starts here +_scratch_mkfs >/dev/null +_scratch_mount + +corrupt_inline +corrupt_prealloc_to_reg +corrupt_reg_to_prealloc +corrupt_punch_hole +corrupt_plug_hole +corrupt_verity_descriptor +corrupt_root_hash +corrupt_merkle_tree + +status=0 +exit diff --git a/tests/btrfs/290.out b/tests/btrfs/290.out new file mode 100644 index 00000000..056b114b --- /dev/null +++ b/tests/btrfs/290.out @@ -0,0 +1,25 @@ +QA output created by 290 +inl +pread: Input/output error +pread: Input/output error +prealloc +pread: Input/output error +pread: Input/output error +reg +pread: Input/output error +pread: Input/output error +punch +pread: Input/output error +pread: Input/output error +plug +pread: Input/output error +pread: Input/output error +desc +SCRATCH_MNT/desc: Invalid argument +SCRATCH_MNT/desc: Invalid argument +roothash +pread: Input/output error +pread: Input/output error +merkle +pread: Input/output error +pread: Input/output error diff --git a/tests/btrfs/group b/tests/btrfs/group index 331dd432..13051562 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -238,3 +238,4 @@ 233 auto quick subvolume 234 auto quick compress rw 235 auto quick send +290 auto quick verity From patchwork Wed May 5 21:04:44 2021 Content-Type: text/plain; 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Wed, 5 May 2021 17:04:50 -0400 (EDT) From: Boris Burkov To: fstests@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v4 2/4] generic/574: corrupt btrfs merkle tree data Date: Wed, 5 May 2021 14:04:44 -0700 Message-Id: <1fce7bfd74d15ddc4492a642d275eec284910950.1620248200.git.boris@bur.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org generic/574 has tests for corrupting the merkle tree data stored by the filesystem. Since btrfs uses a different scheme for storing this data, the existing logic for corrupting it doesn't work out of the box. Adapt it to properly corrupt btrfs merkle items. This test relies on the btrfs implementation of fsverity in the patches titled: btrfs: initial fsverity support btrfs: check verity for reads of inline extents and holes btrfs: fallback to buffered io for verity files A fix for fiemap in the patch titled: btrfs: return whole extents in fiemap and on btrfs-corrupt-block for corruption in the patches titled: btrfs-progs: corrupt generic item data with btrfs-corrupt-block btrfs-progs: expand corrupt_file_extent in btrfs-corrupt-block Signed-off-by: Boris Burkov --- common/verity | 18 ++++++++++++++++++ tests/generic/574 | 5 +++++ 2 files changed, 23 insertions(+) diff --git a/common/verity b/common/verity index d2c1ea24..1636e88b 100644 --- a/common/verity +++ b/common/verity @@ -315,6 +315,24 @@ _fsv_scratch_corrupt_merkle_tree() (( offset += ($(_get_filesize $file) + 65535) & ~65535 )) _fsv_scratch_corrupt_bytes $file $offset ;; + btrfs) + local ino=$(stat -c '%i' $file) + _scratch_unmount + local byte="" + while read -n 1 byte; do + if [ -z $byte ]; then + break + fi + local ascii=$(printf "%d" "'$byte'") + # This command will find a Merkle tree item for the inode (-I $ino,37,0) + # in the default filesystem tree (-r 5) and corrupt one byte (-b 1) at + # $offset (-o $offset) with the ascii representation of the byte we read + # (-v $ascii) + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,37,0 -v $ascii -o $offset -b 1 $SCRATCH_DEV + (( offset += 1 )) + done + _scratch_mount + ;; *) _fail "_fsv_scratch_corrupt_merkle_tree() unimplemented on $FSTYP" ;; diff --git a/tests/generic/574 b/tests/generic/574 index 1e296618..e4370dae 100755 --- a/tests/generic/574 +++ b/tests/generic/574 @@ -43,6 +43,11 @@ _scratch_mount fsv_orig_file=$SCRATCH_MNT/file fsv_file=$SCRATCH_MNT/file.fsv +# utility needed for corrupting Merkle data itself in btrfs +if [ $FSTYP == "btrfs" ]; then + _require_command "$BTRFS_CORRUPT_BLOCK_PROG" btrfs_corrupt_block +fi + setup_zeroed_file() { local len=$1 From patchwork Wed May 5 21:04:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Burkov X-Patchwork-Id: 12241033 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8ED68C43600 for ; 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Wed, 5 May 2021 17:04:52 -0400 (EDT) From: Boris Burkov To: fstests@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v4 3/4] btrfs: test verity orphans with dmlogwrites Date: Wed, 5 May 2021 14:04:45 -0700 Message-Id: X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org The behavior of orphans is most interesting across mounts, interrupted at arbitrary points during fsverity enable. To cover as many such cases as possible, use dmlogwrites and dmsnapshot as in log-writes/replay-individual.sh. At each log entry, we want to assert a somewhat complicated invariant: If verity has not yet started: an orphan indicates that verity has started. If verity has started: mount should handle the orphan and blow away verity data: expect 0 merkle items after mounting the snapshot dev. If we can measure the file, verity has finished. If verity has finished: the orphan should be gone, so mount should not blow away merkle items. Expect the same number of merkle items before and after mounting the snapshot dev. Note that this relies on grepping btrfs inspect-internal dump-tree. Until btrfs-progs has the ability to print the new Merkle items, they will show up as UNKNOWN.36/37. Signed-off-by: Boris Burkov --- tests/btrfs/291 | 157 ++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/291.out | 2 + tests/btrfs/group | 1 + 3 files changed, 160 insertions(+) create mode 100755 tests/btrfs/291 create mode 100644 tests/btrfs/291.out diff --git a/tests/btrfs/291 b/tests/btrfs/291 new file mode 100755 index 00000000..eab3a495 --- /dev/null +++ b/tests/btrfs/291 @@ -0,0 +1,157 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 Facebook, Inc. All Rights Reserved. +# +# FS QA Test 291 +# +# Test btrfs consistency after each FUA while enabling verity on a file +# This test works by following the pattern in log-writes/replay-individual.sh: +# 1. run a workload (verity + sync) while logging to the log device +# 2. replay an entry to the replay device +# 3. snapshot the replay device to the snapshot device +# 4. run destructive tests on the snapshot device (e.g. mount with orphans) +# 5. goto 2 +# +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + _log_writes_cleanup &> /dev/null + rm -f $tmp.* + $LVM_PROG vgremove -f -y $vgname >>$seqres.full 2>&1 + losetup -d $loop_dev >>$seqres.full 2>&1 +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/attr +. ./common/dmlogwrites +. ./common/verity + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +_supported_fs btrfs + +_require_scratch +_require_log_writes +_require_dm_target snapshot +_require_command $LVM_PROG lvm +_require_scratch_verity + +sync_loop() { + i=$1 + [ -z "$i" ] && _fail "sync loop needs a number of iterations" + while [ $i -gt 0 ] + do + $XFS_IO_PROG -c sync $SCRATCH_MNT + let i-=1 + done +} + +dump_tree() { + local dev=$1 + $BTRFS_UTIL_PROG inspect-internal dump-tree $dev +} + +count_item() { + local dev=$1 + local item=$2 + dump_tree $dev | grep -c $item +} + +_log_writes_init $SCRATCH_DEV +_log_writes_mkfs +_log_writes_mount + +f=$SCRATCH_MNT/fsv +MB=$((1024 * 1024)) +$XFS_IO_PROG -fc "pwrite -q 0 $((10 * $MB))" $f +$XFS_IO_PROG -c sync $SCRATCH_MNT +sync_loop 10 & +_fsv_enable $f +$XFS_IO_PROG -c sync $SCRATCH_MNT + +_log_writes_unmount +_log_writes_remove + +$XFS_IO_PROG -fc "pwrite -q -S 0 $((8192 * $MB)) $MB" $tmp.loop-file +loop_dev=$(losetup -f --show $tmp.loop-file) +vgname=vg_replay +lvname=lv_replay +replay_dev=/dev/mapper/vg_replay-lv_replay +snapname=lv_snap +snap_dev=/dev/mapper/vg_replay-$snapname + +$LVM_PROG vgcreate -f $vgname $loop_dev >>$seqres.full 2>&1 || _fail "failed to vgcreate $vgname" +$LVM_PROG lvcreate -L 4G -n $lvname $vgname -y >>$seqres.full 2>&1 || \ + _fail "failed to lvcreate $lvname" +$UDEV_SETTLE_PROG >>$seqres.full 2>&1 + +replay_log_prog=$here/src/log-writes/replay-log +num_entries=$($replay_log_prog --log $LOGWRITES_DEV --num-entries) +entry=$($replay_log_prog --log $LOGWRITES_DEV --replay $replay_dev --find --end-mark mkfs | cut -d@ -f1) +$replay_log_prog --log $LOGWRITES_DEV --replay $replay_dev --limit $entry || \ + _fail "failed to replay to start entry $entry" +let entry+=1 + +# state = 0: verity hasn't started +# state = 1: verity underway +# state = 2: verity done +state=0 +while [ $entry -lt $num_entries ]; +do + $replay_log_prog --limit 1 --log $LOGWRITES_DEV --replay $replay_dev --start $entry || \ + _fail "failed to take replay step at entry: $entry" + + $LVM_PROG lvcreate -s -L 4M -n $snapname $vgname/$lvname >>$seqres.full 2>&1 || \ + _fail "Failed to create snapshot" + $UDEV_SETTLE_PROG >>$seqres.full 2>&1 + + orphan=$(count_item $snap_dev ORPHAN) + if [ $state -eq 0 ]; then + [ $orphan -gt 0 ] && state=1 + fi + + pre_mount=$(count_item $snap_dev UNKNOWN.3[67]) + _mount $snap_dev $SCRATCH_MNT || _fail "mount failed at entry $entry" + fsverity measure $SCRATCH_MNT/fsv >>$seqres.full 2>&1 + measured=$? + umount $SCRATCH_MNT + [ $state -eq 1 ] && [ $measured -eq 0 ] && state=2 + [ $state -eq 2 ] && ([ $measured -eq 0 ] || _fail "verity done, but measurement failed at entry $entry") + post_mount=$(count_item $snap_dev UNKNOWN.3[67]) + + echo "entry: $entry, state: $state, orphan: $orphan, pre_mount: $pre_mount, post_mount: $post_mount" >> $seqres.full + + if [ $state -eq 1 ]; then + [ $post_mount -eq 0 ] || \ + _fail "mount failed to clear under-construction merkle items pre: $pre_mount, post: $post_mount at entry $entry"; + fi + if [ $state -eq 2 ]; then + [ $pre_mount -gt 0 ] || \ + _fail "expected to have verity items before mount at entry $entry" + [ $pre_mount -eq $post_mount ] || \ + _fail "mount cleared merkle items after verity was enabled $pre_mount vs $post_mount at entry $entry"; + fi + + let entry+=1 + $LVM_PROG lvremove $vgname/$snapname -y >>$seqres.full +done + +echo "Silence is golden" + +# success, all done +status=0 +exit diff --git a/tests/btrfs/291.out b/tests/btrfs/291.out new file mode 100644 index 00000000..04605c70 --- /dev/null +++ b/tests/btrfs/291.out @@ -0,0 +1,2 @@ +QA output created by 291 +Silence is golden diff --git a/tests/btrfs/group b/tests/btrfs/group index 13051562..cc5a811e 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -239,3 +239,4 @@ 234 auto quick compress rw 235 auto quick send 290 auto quick verity +291 auto verity From patchwork Wed May 5 21:04:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Burkov X-Patchwork-Id: 12241035 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B7EDC4360C for ; 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Wed, 5 May 2021 17:04:54 -0400 (EDT) From: Boris Burkov To: fstests@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v4 4/4] generic: test fs-verity EFBIG scenarios Date: Wed, 5 May 2021 14:04:46 -0700 Message-Id: <508058f805a45808764a477e9ad04353a841cf53.1620248200.git.boris@bur.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org btrfs, ext4, and f2fs cache the Merkle tree past EOF, which restricts the maximum file size beneath the normal maximum. Test the logic in those filesystems against files with sizes near the maximum. To work properly, this does require some understanding of the practical but not standardized layout of the Merkle tree. This is a bit unpleasant and could make the test incorrect in the future, if the implementation changes. On the other hand, it feels quite useful to test this tricky edge case. It could perhaps be made more generic by adding some ioctls to let the file system communicate the maximum file size for a verity file or some information about the storage of the Merkle tree. Signed-off-by: Boris Burkov --- tests/generic/632 | 86 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/632.out | 7 ++++ tests/generic/group | 1 + 3 files changed, 94 insertions(+) create mode 100755 tests/generic/632 create mode 100644 tests/generic/632.out diff --git a/tests/generic/632 b/tests/generic/632 new file mode 100755 index 00000000..5a5ed576 --- /dev/null +++ b/tests/generic/632 @@ -0,0 +1,86 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2021 Facebook, Inc. All Rights Reserved. +# +# FS QA Test 632 +# +# Test some EFBIG scenarios with very large files. +# To create the files, use pwrite with an offset close to the +# file system's max file size. +# +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/verity + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs ext4 f2fs +_require_test +_require_math +_require_scratch_verity + +_scratch_mkfs_verity &>> $seqres.full +_scratch_mount + +fsv_file=$SCRATCH_MNT/file.fsv + +max_sz=$(_get_max_file_size) +_fsv_scratch_begin_subtest "way too big: fail on first merkle block" +# have to go back by 4096 from max to not hit the fsverity MAX_DEPTH check. +$XFS_IO_PROG -fc "pwrite -q $(($max_sz - 4096)) 1" $fsv_file +_fsv_enable $fsv_file |& _filter_scratch + +# The goal of this second test is to make a big enough file that we trip the +# EFBIG codepath, but not so big that we hit it immediately as soon as we try +# to write a Merkle leaf. Because of the layout of the Merkle tree that +# fs-verity uses, this is a bit complicated to compute dynamically. + +# The layout of the Merkle tree has the leaf nodes last, but writes them first. +# To get an interesting overflow, we need the start of L0 to be < MAX but the +# end of the merkle tree (EOM) to be past MAX. Ideally, the start of L0 is only +# just smaller than MAX, so that we don't have to write many blocks to blow up. + +# 0 EOF round-to-64k L7L6L5 L4 L3 L2 L1 L0 MAX EOM +# |-------------------------| ||-|--|---|----|-----|------|--|!!!!!| + +# Given this structure, we can compute the size of the file that yields the +# desired properties: +# sz + 64k + sz/128^8 + sz/128^7 + ... + sz/128^2 < MAX +# (128^8)sz + (128^8)64k + sz + (128)sz + (128^2)sz + ... + (128^6)sz < (128^8)MAX +# sz(128^8 + 128^6 + 128^5 + 128^4 + 128^3 + 128^2 + 128 + 1) < (128^8)(MAX - 64k) +# sz < (128^8/(128^8 + (128^6 + ... 1))(MAX - 64k) +# +# Do the actual caclulation with 'bc' and 20 digits of precision. +set -f +calc="scale=20; ($max_sz - 65536) * ((128^8) / (1 + 128 + 128^2 + 128^3 + 128^4 + 128^5 + 128^6 + 128^8))" +sz=$(echo $calc | $BC -q | cut -d. -f1) +set +f + + +_fsv_scratch_begin_subtest "still too big: fail on first invalid merkle block" +$XFS_IO_PROG -fc "pwrite -q $sz 1" $fsv_file +_fsv_enable $fsv_file |& _filter_scratch + +# success, all done +status=0 +exit diff --git a/tests/generic/632.out b/tests/generic/632.out new file mode 100644 index 00000000..59602c24 --- /dev/null +++ b/tests/generic/632.out @@ -0,0 +1,7 @@ +QA output created by 632 + +# way too big: fail on first merkle block +ERROR: FS_IOC_ENABLE_VERITY failed on 'SCRATCH_MNT/file.fsv': File too large + +# still too big: fail on first invalid merkle block +ERROR: FS_IOC_ENABLE_VERITY failed on 'SCRATCH_MNT/file.fsv': File too large diff --git a/tests/generic/group b/tests/generic/group index ab00cc04..76d46e86 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -634,3 +634,4 @@ 629 auto quick rw copy_range 630 auto quick rw dedupe clone 631 auto rw overlay rename +632 auto quick verity