common: Add _require_no_xfs_bug_on_assert and factor out filter_xfs_dmesg

1) Introduce _require_no_xfs_bug_on_assert helper to check if XFS is
   built with CONFIG_XFS_ASSERT_FATAL, and call _require_no_xfs_debug
   if bug_on_assert is not available.

2) Apply _require_no_xfs_bug_on_assert in xfs/098 and xfs/115.

3) Move filter_xfs_dmesg from xfs/098 to common/filter, and rename
   it as _filter_assert_dmesg.

[eguan: update comment and _notrun message a bit]

Signed-off-by: xiao yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

4 files changed, 41 insertions, 15 deletions

diff --git a/common/filter b/common/filter
index 8e1fdb4e50..53874a08f5 100644
--- a/common/filter
+++ b/common/filter
@@ -570,5 +570,16 @@ _filter_aiodio_dmesg()
 	    -e "s#$warn9#Intentional warnings in dio_complete#"
 }
 
+# We generate assert related WARNINGs on purpose and make sure test doesn't fail
+# because of these warnings. This is a helper for _check_dmesg() to filter out
+# them.
+_filter_assert_dmesg()
+{
+	local warn1="WARNING:.*fs/xfs/xfs_message\.c:.*asswarn.*"
+	local warn2="WARNING:.*fs/xfs/xfs_message\.c:.*assfail.*"
+	sed -e "s#$warn1#Intentional warnings in asswarn#" \
+	    -e "s#$warn2#Intentional warnings in assfail#"
+}
+
 # make sure this script returns success
 /bin/true
diff --git a/common/xfs b/common/xfs
index ab58364079..9b20b03807 100644
--- a/common/xfs
+++ b/common/xfs
@@ -625,6 +625,28 @@ _require_no_xfs_debug()
 	fi
 }
 
+# Require that assertions will not crash the system.
+#
+# Assertions would always crash the system if XFS assert fatal was enabled
+# (CONFIG_XFS_ASSERT_FATAL=y).  If a test is designed to trigger an assertion,
+# skip the test on a CONFIG_XFS_ASSERT_FATAL built XFS by default.  Note:
+# CONFIG_XFS_ASSERT_FATAL can be disabled by setting bug_on_assert to zero if
+# we want test to run.
+_require_no_xfs_bug_on_assert()
+{
+	if [ -f /sys/fs/xfs/debug/bug_on_assert ]; then
+		grep -q "1" /sys/fs/xfs/debug/bug_on_assert && \
+		   _notrun "test requires XFS bug_on_assert to be off, turn it off to run the test"
+	else
+		# Note: Prior to the creation of CONFIG_XFS_ASSERT_FATAL (and
+		# the sysfs knob bug_on_assert), assertions would always crash
+		# the system if XFS debug was enabled (CONFIG_XFS_DEBUG=y).  If
+		# a test is designed to trigger an assertion and the test
+		# designer does not want to hang fstests, skip the test.
+		_require_no_xfs_debug
+	fi
+}
+
 # Get a metadata field
 # The first arg is the field name
 # The rest of the arguments are xfs_db commands to find the metadata.
diff --git a/tests/xfs/098 b/tests/xfs/098
index 9bcd94b0c0..24ce1d5d44 100755
--- a/tests/xfs/098
+++ b/tests/xfs/098
@@ -47,6 +47,8 @@ _cleanup()
 _supported_fs xfs
 _supported_os Linux
 
+# We corrupt XFS on purpose, and check if assert failures would crash system.
+_require_no_xfs_bug_on_assert
 _require_scratch
 test -n "${FORCE_FUZZ}" || _require_scratch_xfs_crc
 _require_attrs
@@ -56,16 +58,6 @@ test -z "${FUZZ_ARGS}" && FUZZ_ARGS="-n 8 -3"
 
 rm -f $seqres.full
 
-# If we corrupt log on a CONFIG_XFS_WARN build, there will be mount related
-# WARNINGs in dmesg as expected.  We don't want to simply _disable_dmesg_check
-# which could miss other potential bugs, so filter out the intentional WARNINGs,
-# make sure test doesn't fail because of this warning and fails on other WARNINGs.
-filter_xfs_dmesg()
-{
-	local warn="WARNING:.*fs/xfs/xfs_message\.c:.*asswarn.*"
-	sed -e "s#$warn#Intentional warnings in asswarn#"
-}
-
 TESTDIR="${SCRATCH_MNT}/scratchdir"
 TESTFILE="${TESTDIR}/testfile"
 
@@ -107,8 +99,10 @@ _scratch_mount 2>/dev/null && _fail "mount should not succeed"
 echo "+ repair fs"
 _repair_scratch_fs >> $seqres.full 2>&1
 
-# mount may trigger related WARNINGs, so filter them.
-_check_dmesg filter_xfs_dmesg
+# We may trigger assert related WARNINGs if we corrupt log on a
+# CONFIG_XFS_WARN or CONFIG_XFS_DEBUG (CONFIG_XFS_ASSERT_FATAL is
+# disabled) build, so filter them.
+_check_dmesg _filter_assert_dmesg
 
 echo "+ mount image (2)"
 _scratch_mount
diff --git a/tests/xfs/115 b/tests/xfs/115
index 0e62628d70..f77d0dd292 100755
--- a/tests/xfs/115
+++ b/tests/xfs/115
@@ -52,9 +52,8 @@ rm -f $seqres.full
 _supported_fs generic
 _supported_os Linux
 _require_scratch_nocheck
-# we corrupt XFS on purpose, and debug built XFS would crash due to assert
-# failure, so skip if we're testing on a debug built XFS
-_require_no_xfs_debug
+# We corrupt XFS on purpose, and check if assert failures would crash system.
+_require_no_xfs_bug_on_assert
 _disable_dmesg_check
 
 # Make sure we disable finobt if the filesystem supports it, otherwise, just