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 E044630595B; Mon, 27 Apr 2026 10:20:03 +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=1777285204; cv=none; b=bizjNDizQBaEFcI3gkURPrxWQ8tXbYHuZgPUEeyWJ7bMoqkymNhnvKiu0xunWtMbj7q1n+MXzE1GbK3UUUhow6cFguQFOa52eegKMhoZn/3Z7FBxMuC0bAFlKijDmu1LnDwpRBxRIEoSNgKiE0LN6Mc5w6MgPp8RPGbIY983OCk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777285204; c=relaxed/simple; bh=AnK9/266XVBJ3UR81lpGj5Wkb9+DgFvDhivXlFWsuBM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mqI4r8ZITAuzy69+ghBMDdU3g10oaWiFwH05Ke1Q8E8noUvZGmJi442xKRgziFSJWuZQsamT2xdde6MmNlzTnIq1qSzzLxWeY9bRX2HNdbo351GaCURouz6Hj6R6lG+M8/YpaIlAI2l/ckROmKe91vRXNmnObsuwHMxwSt3vedA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tZDQq6a3; 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="tZDQq6a3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 28A65C19425; Mon, 27 Apr 2026 10:20:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777285203; bh=AnK9/266XVBJ3UR81lpGj5Wkb9+DgFvDhivXlFWsuBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tZDQq6a3NJn7EMGPgfbCC/VDPWEpLu9Tk9X/jtZslroJompKUUzr6ye3Uvh7Gq4aH peKcdadP8TIjeXubKU0oRXcPdfBRsD8EzIdTrC1a1vK1Hgp/iA3bGQHSkG2x/lxX9M TgdRtSusV9okd35RLdiyntPw14+ObBhuYwh060XCrH9u9G8/q7O8USuKkua3XmZj+K M/o0A8rtF4IQtqcs25w7xvJop33F6q3udI3MwxOWBxsFDqohqGA7nMzuLO3z0ZxnLf QjpcE03vt/16bwn6uuPWrSz8gFkZC7Frq4OtMU2RqpHeB9xDeIOBtdy0OYZgGf05bN Ck0Zt39r33YTg== 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 v3 4/9] fstests: verify fanotify isolation on cloned filesystems Date: Mon, 27 Apr 2026 18:19:36 +0800 Message-ID: <4777ecd14815b92c9e8577ed4d073d0f999e51ef.1777281778.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 | 115 ++++++++++++++++++++++++++++++++++++++++++ tests/generic/801.out | 7 +++ 3 files changed, 123 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="$(type -P fsnotifywait)" # udev wait functions. # diff --git a/tests/generic/801 b/tests/generic/801 new file mode 100644 index 000000000000..3f64e4de2206 --- /dev/null +++ b/tests/generic/801 @@ -0,0 +1,115 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2026 Anand Jain . All Rights Reserved. +# +# FS QA Test 801 +# Verify fanotify FID functionality on cloned filesystems by setting up +# watchers and making sure notifications are in the correct logs files. + +. ./common/preamble + +_begin_fstest auto quick mount clone + +_require_test +_require_loop +_require_command "$FSNOTIFYWAIT_PROG" fsnotifywait + +[ "$FSTYP" = "ext4" ] && _fixed_by_kernel_commit xxxxxxxxxxxx \ + "ext4: derive f_fsid from block device to avoid collisions" + +_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