{"id":2229320,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2229320/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/01452c53ff400026796c4d43e2e23906ea9071ea.1777357321.git.asj@kernel.org/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.1/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<01452c53ff400026796c4d43e2e23906ea9071ea.1777357321.git.asj@kernel.org>","date":"2026-04-28T06:42:53","name":"[v4,3/9] fstests: add test for inotify isolation on cloned devices","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"235a8f4498dba76e112e2d4e4511fc752d584e4b","submitter":{"id":92722,"url":"http://patchwork.ozlabs.org/api/1.1/people/92722/?format=json","name":"Anand Jain","email":"asj@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/01452c53ff400026796c4d43e2e23906ea9071ea.1777357321.git.asj@kernel.org/mbox/","series":[{"id":501769,"url":"http://patchwork.ozlabs.org/api/1.1/series/501769/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=501769","date":"2026-04-28T06:42:52","name":"fstests: add test coverage for cloned filesystem ids","version":4,"mbox":"http://patchwork.ozlabs.org/series/501769/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2229320/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2229320/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=XE2GMlNG;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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arc=none smtp.client-ip=10.30.226.201"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777358599;\n\tbh=TRqMwolAX4yCDWXB0j0qpAqQz8UHvCOtRXRGaE/MMA8=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=XE2GMlNG7gq2bTtYeHZAOAhjqnP6d27fF7kcuijBEVVdgCe5YxpaQFrBsTVZLsa/5\n\t 5/YsaM7+/oua6+DJLhuKL868G/k46EJ+5qOwAUbYeGtJded7y9nqI2WF5riPZnHrxr\n\t ETv7NSobjASKRTPocxYtp0WDL9HlX9a7xsj3TsfO8RllS9usC0Xg4NrosmehDs2gnD\n\t E/i8BpWBDqqOwGL8sNdAWWxqLAnBwp1WVjrfglsAYFgiSBYV7moruCN6gzvZRsI7ai\n\t kO9XCyyAElQMeW1L7CsV9eMn2HmL328g7vbMo8h2osLoedcyNguv+zoopGyRnVvmzT\n\t GtliUsutGUylw==","From":"Anand Jain ","To":"fstests@vger.kernel.org","Cc":"linux-btrfs@vger.kernel.org,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-xfs@vger.kernel.org,\n\tlinux-f2fs@vger.kernel.org,\n\tamir73il@gmail.com,\n\tzlang@redhat.com,\n\thch@infradead.org","Subject":"[PATCH v4 3/9] fstests: add test for inotify isolation on cloned\n devices","Date":"Tue, 28 Apr 2026 14:42:53 +0800","Message-ID":"\n <01452c53ff400026796c4d43e2e23906ea9071ea.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","X-Spam-Status":"No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"Add a new test, to verify that the kernel correctly differentiates between\ntwo block devices sharing the same FSID/UUID.\n\nSigned-off-by: Anand Jain \n---\n common/config | 1 +\n tests/generic/800 | 89 +++++++++++++++++++++++++++++++++++++++++++\n tests/generic/800.out | 7 ++++\n 3 files changed, 97 insertions(+)\n create mode 100644 tests/generic/800\n create mode 100644 tests/generic/800.out","diff":"diff --git a/common/config b/common/config\nindex 4fd4c2c8af11..605a57947a40 100644\n--- a/common/config\n+++ b/common/config\n@@ -242,6 +242,7 @@ export BTRFS_MAP_LOGICAL_PROG=$(type -P btrfs-map-logical)\n export PARTED_PROG=\"$(type -P parted)\"\n export XFS_PROPERTY_PROG=\"$(type -P xfs_property)\"\n export FSCRYPTCTL_PROG=\"$(type -P fscryptctl)\"\n+export INOTIFYWAIT_PROG=\"$(type -P inotifywait)\"\n \n # udev wait functions.\n #\ndiff --git a/tests/generic/800 b/tests/generic/800\nnew file mode 100644\nindex 000000000000..4b9bd3e4f487\n--- /dev/null\n+++ b/tests/generic/800\n@@ -0,0 +1,89 @@\n+#! /bin/bash\n+# SPDX-License-Identifier: GPL-2.0\n+# Copyright (c) 2026 Anand Jain . All Rights Reserved.\n+#\n+# FS QA Test 800\n+#\n+# Verify if the kernel or userspace becomes confused when two block devices\n+# share the same fid/fsid/uuid. Create inotify on both original and cloned\n+# filesystem. Monitor the notification in the respective logs.\n+\n+. ./common/preamble\n+\n+_begin_fstest auto quick mount clone\n+\n+_require_test\n+_require_block_device $TEST_DEV\n+_require_loop\n+_require_command \"$INOTIFYWAIT_PROG\" inotifywait\n+\n+_cleanup()\n+{\n+\tcd /\n+\t[[ -n $pid1 ]] && { kill -TERM \"$pid1\" 2> /dev/null; wait $pid1; }\n+\t[[ -n $pid2 ]] && { kill -TERM \"$pid2\" 2> /dev/null; wait $pid2; }\n+\trm -r -f $tmp.*\n+\t_unmount $mnt1 2>/dev/null\n+\t_unmount $mnt2 2>/dev/null\n+\t_loop_image_destroy \"${devs[@]}\" 2> /dev/null\n+}\n+\n+devs=()\n+_loop_image_create_clone devs\n+mkdir -p $TEST_DIR/$seq\n+mnt1=$TEST_DIR/$seq/mnt1\n+mnt2=$TEST_DIR/$seq/mnt2\n+mkdir -p $mnt1\n+mkdir -p $mnt2\n+\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev1\"\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev2\"\n+\n+log1=$tmp.inotify1\n+log2=$tmp.inotify2\n+\n+pid1=\"\"\n+pid2=\"\"\n+echo \"Setup inotify watchers on both mnt1 and mnt2\"\n+$INOTIFYWAIT_PROG -m -e create --format '%f' $mnt1 > $log1 2>&1 &\n+pid1=$!\n+$INOTIFYWAIT_PROG -m -e create --format '%f' $mnt2 > $log2 2>&1 &\n+pid2=$!\n+sleep 2\n+\n+echo \"Trigger file creation on mnt1\"\n+touch $mnt1/file_on_mnt1\n+sync\n+sleep 1\n+\n+echo \"Trigger file creation on mnt2\"\n+touch $mnt2/file_on_mnt2\n+sync\n+sleep 1\n+\n+echo \"Verify inotify isolation\"\n+kill $pid1 $pid2\n+wait $pid1 $pid2 2>/dev/null\n+pid1=\"\"\n+pid2=\"\"\n+\n+if grep -q \"file_on_mnt1\" $log1 && ! grep -q \"file_on_mnt2\" $log1; then\n+\techo \"SUCCESS: mnt1 events isolated.\"\n+else\n+\techo \"FAIL: mnt1 inotify confusion!\"\n+\t[ ! -s $log1 ] && echo \" - mnt1 received no events.\"\n+\tgrep -q \"file_on_mnt2\" $log1 && echo \" - mnt1 received event from mnt2.\"\n+fi\n+\n+if grep -q \"file_on_mnt2\" $log2 && ! grep -q \"file_on_mnt1\" $log2; then\n+\techo \"SUCCESS: mnt2 events isolated.\"\n+else\n+\techo \"FAIL: mnt2 inotify confusion!\"\n+\t[ ! -s $log2 ] && echo \" - mnt2 received no events.\"\n+\tgrep -q \"file_on_mnt1\" $log2 && echo \" - mnt2 received event from mnt1.\"\n+fi\n+\n+status=0\n+exit\ndiff --git a/tests/generic/800.out b/tests/generic/800.out\nnew file mode 100644\nindex 000000000000..b10842a31210\n--- /dev/null\n+++ b/tests/generic/800.out\n@@ -0,0 +1,7 @@\n+QA output created by 800\n+Setup inotify watchers on both mnt1 and mnt2\n+Trigger file creation on mnt1\n+Trigger file creation on mnt2\n+Verify inotify isolation\n+SUCCESS: mnt1 events isolated.\n+SUCCESS: mnt2 events isolated.\n","prefixes":["v4","3/9"]}