From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 71ABC351C13; Tue, 28 Apr 2026 06:43:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777358601; cv=none; b=h9iws6UHwX8/5ZFlDzNLHJr12IsZdqw0KHR0OKf4hM2mzbKOu2HwineoMA/G/AAH1sCM3csGytjqxmKfdCZBA+it7D4dzldU7BrllTUpRzAlnAxjJEZ1MKeJc0lREnvPqYFM6bOvvgMN/C2gU8tLXDA+uB09daL3zjtEf3JpgMg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777358601; c=relaxed/simple; bh=A39fwIamuiQCahpTIIYXpcht58U1LThjSWjT+3wKKzg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BTSdVvLRp2wCfGDr1oJhu17O/eVPIThDdjXv515X5uzLvV98gSqnJlFtNrOQg+xYt9YB6PZ/UCiUgHPWQS+h+S6rHYIosTNc6g2pICx4H0TJzr7fqRz+qxCcgK7KTA+JAIhtRWjBGxp3/1VaUSLz7vNHGlbGBbf41s1GjnbQpkg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XsXvJqBd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XsXvJqBd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ABF40C2BCAF; Tue, 28 Apr 2026 06:43:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777358601; bh=A39fwIamuiQCahpTIIYXpcht58U1LThjSWjT+3wKKzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XsXvJqBd6c7UyD/VWDxkPzTPcW3rZ2IlncGPvaK96JP7X/1B289g29XCbw3grYT7y +0G89aAi53sboA7A9vfOJhB9N0BiKtvrqCOfXac2Ef2V4IkmjGIweaF4tPSCxlg0vB 5VcEQktAz2judFWCCA7CO1m8IGY1U3pE+tlUnw8luqgtvghbcdhVKBo/rARw5sNP2p ZrBik8yig3bJL6GpfW7t30DCXMHWf/QXZaM2cvqohWl4fw83Ydcy599eEgAHNj5Q1N 50svDWXoU0GrVod26HomuOrDWEcXOHLjqBovE5SXW3Z+YcAUOo2+qATfj9toAKoas5 IFfhUXpowsuHg== From: Anand Jain To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-f2fs@vger.kernel.org, amir73il@gmail.com, zlang@redhat.com, hch@infradead.org Subject: [PATCH v4 4/9] fstests: verify fanotify isolation on cloned filesystems Date: Tue, 28 Apr 2026 14:42:54 +0800 Message-ID: <5857d9f33de7f0ea8ddd12c36334c6463c0bfe0f.1777357321.git.asj@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Verify that fanotify events are correctly routed to the appropriate watcher when cloned filesystems are mounted. Helps verify kernel's event notification distinguishes between devices sharing the same FSID/UUID. Signed-off-by: Anand Jain --- common/config | 1 + tests/generic/801 | 113 ++++++++++++++++++++++++++++++++++++++++++ tests/generic/801.out | 7 +++ 3 files changed, 121 insertions(+) create mode 100644 tests/generic/801 create mode 100644 tests/generic/801.out diff --git a/common/config b/common/config index 605a57947a40..1588bdcb1aa1 100644 --- a/common/config +++ b/common/config @@ -243,6 +243,7 @@ export PARTED_PROG="$(type -P parted)" export XFS_PROPERTY_PROG="$(type -P xfs_property)" export FSCRYPTCTL_PROG="$(type -P fscryptctl)" export INOTIFYWAIT_PROG="$(type -P inotifywait)" +export FSNOTIFYWAIT_PROG="$(type -P fsnotifywait)" # udev wait functions. # diff --git a/tests/generic/801 b/tests/generic/801 new file mode 100644 index 000000000000..e1282f4e3d71 --- /dev/null +++ b/tests/generic/801 @@ -0,0 +1,113 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2026 Anand Jain . All Rights Reserved. +# +# FS QA Test 801 +# Verify fanotify FID functionality on cloned filesystems by setting up +# watchers and making sure notifications are in the correct logs files. + +. ./common/preamble + +_begin_fstest auto quick mount clone + +_require_test +_require_block_device $TEST_DEV +_require_loop +_require_command "$FSNOTIFYWAIT_PROG" fsnotifywait + +_cleanup() +{ + cd / + [[ -n $pid1 ]] && { kill -TERM "$pid1" 2> /dev/null; wait $pid1; } + [[ -n $pid2 ]] && { kill -TERM "$pid2" 2> /dev/null; wait $pid2; } + umount $mnt1 $mnt2 2>/dev/null + _loop_image_destroy "${devs[@]}" 2> /dev/null + rm -r -f $tmp.* +} + +monitor_fanotify() +{ + local mmnt=$1 + exec stdbuf -oL $FSNOTIFYWAIT_PROG -m -F -S -e create "$mmnt" 2>&1 +} + +fsid_to_fid_parts() +{ + local fsid=$1 + # Pad to 16 hex chars (64-bit), then split into two 32-bit halves + local padded=$(printf '%016x' "0x${fsid}") + local hi=$(printf '%x' "0x${padded:0:8}") # strips leading zeros + local lo=$(printf '%x' "0x${padded:8:8}") # strips leading zeros + echo "${hi}.${lo}" +} + +devs=() +_loop_image_create_clone devs +mkdir -p $TEST_DIR/$seq +mnt1=$TEST_DIR/$seq/mnt1 +mnt2=$TEST_DIR/$seq/mnt2 +mkdir -p $mnt1 +mkdir -p $mnt2 + +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \ + _fail "Failed to mount dev1" +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \ + _fail "Failed to mount dev2" + +fsid1=$(stat -f -c "%i" $mnt1) +fsid2=$(stat -f -c "%i" $mnt2) + +[[ "$fsid1" == "$fsid2" ]] && \ + _notrun "Require clone filesystem with unique f_fsid" + +log1=$tmp.fanotify1 +log2=$tmp.fanotify2 + +pid1="" +pid2="" +echo "Setup FID fanotify watchers on both mnt1 and mnt2" +( monitor_fanotify "$mnt1" > "$log1" ) & +pid1=$! +( monitor_fanotify "$mnt2" > "$log2" ) & +pid2=$! +sleep 2 + +echo "Trigger file creation on mnt1" +touch $mnt1/file_on_mnt1 +sync +sleep 1 + +echo "Trigger file creation on mnt2" +touch $mnt2/file_on_mnt2 +sync +sleep 1 + +echo "Verify fsid in the fanotify" +kill $pid1 $pid2 +wait $pid1 $pid2 2>/dev/null +pid1="" +pid2="" + +e_fsid1=$(fsid_to_fid_parts "$fsid1") +e_fsid2=$(fsid_to_fid_parts "$fsid2") + +echo $fsid1 $e_fsid1 $fsid2 $e_fsid2 >> $seqres.full +cat $log1 >> $seqres.full +cat $log2 >> $seqres.full + +if grep -qF "$e_fsid1" "$log1" && ! grep -qF "$e_fsid2" "$log1"; then + echo "SUCCESS: mnt1 events found" +else + [ ! -s "$log1" ] && echo " - mnt1 received no events." + grep -qF "$e_fsid2" "$log1" && echo " - mnt1 received event from mnt2." +fi + +if grep -qF "$e_fsid2" "$log2" && ! grep -qF "$e_fsid1" "$log2"; then + echo "SUCCESS: mnt2 events found" +else + [ ! -s "$log2" ] && echo " - mnt2 received no events." + grep -qF "$e_fsid1" "$log2" && echo " - mnt2 received event from mnt1." +fi + +status=0 +exit diff --git a/tests/generic/801.out b/tests/generic/801.out new file mode 100644 index 000000000000..d7b318d9f27c --- /dev/null +++ b/tests/generic/801.out @@ -0,0 +1,7 @@ +QA output created by 801 +Setup FID fanotify watchers on both mnt1 and mnt2 +Trigger file creation on mnt1 +Trigger file creation on mnt2 +Verify fsid in the fanotify +SUCCESS: mnt1 events found +SUCCESS: mnt2 events found -- 2.43.0