[PATCH v9 2/6] selftests/ftrace: Add clear_dynamic_events() to test cases

[PATCH v9 2/6] selftests/ftrace: Add clear_dynamic_events() to test cases

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add a function to remove all dynamic events from the tracing directory. It
requires a loop as some of the dynamic events may depend on others being
removed first. Also add a safety that prevents it from looping infinitely
due to a bug where an event never gets removed.

Link: https://lkml.kernel.org/r/20210819152825.348941368@goodmis.org

Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .../testing/selftests/ftrace/test.d/functions | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index a6fac927ee82..f68d336b961b 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -83,6 +83,27 @@ clear_synthetic_events() { # reset all current synthetic events
     done
 }
 
+clear_dynamic_events() { # reset all current dynamic events
+    again=1
+    stop=1
+    # loop mulitple times as some events require other to be removed first
+    while [ $again -eq 1 ]; do
+	stop=$((stop+1))
+	# Prevent infinite loops
+	if [ $stop -gt 10 ]; then
+	    break;
+	fi
+	again=2
+	grep -v '^#' dynamic_events|
+	while read line; do
+	    del=`echo $line | sed -e 's/^.\([^ ]*\).*/-\1/'`
+	    if ! echo "$del" >> dynamic_events; then
+		again=1
+	    fi
+	done
+    done
+}
+
 initialize_ftrace() { # Reset ftrace to initial-state
 # As the initial state, ftrace will be set to nop tracer,
 # no events, no triggers, no filters, no function filters,
@@ -93,6 +114,7 @@ initialize_ftrace() { # Reset ftrace to initial-state
     reset_events_filter
     reset_ftrace_filter
     disable_events
+    clear_dynamic_events
     [ -f set_event_pid ] && echo > set_event_pid
     [ -f set_ftrace_pid ] && echo > set_ftrace_pid
     [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
-- 
2.30.2

[PATCH v9 3/6] selftests/ftrace: Fix requirement check of README file

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

The selftest for ftrace checks some features by checking if the README has
text that states the feature is supported by that kernel. Unfortunately,
this check gives false positives because it many not be checked if there's
spaces in the string to check. This is due to the compare between the
required variable with the ":README" string stripped, because neither has
quotes around them.

Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Cc: stable@vger.kernel.org
Fixes: 1b8eec510ba64 ("selftests/ftrace: Support ":README" suffix for requires")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 tools/testing/selftests/ftrace/test.d/functions | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index f68d336b961b..000fd05e84b1 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -137,7 +137,7 @@ check_requires() { # Check required files and tracers
                 echo "Required tracer $t is not configured."
                 exit_unsupported
             fi
-        elif [ $r != $i ]; then
+        elif [ "$r" != "$i" ]; then
             if ! grep -Fq "$r" README ; then
                 echo "Required feature pattern \"$r\" is not in README."
                 exit_unsupported
-- 
2.30.2

[PATCH v9 4/6] selftests/ftrace: Add test case to test adding and removing of event probe

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add a test case that adds an event probe, makes sure that it works, and
then removes it.

Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org/

Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .../test.d/dynevent/add_remove_eprobe.tc      | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
new file mode 100644
index 000000000000..25a3da4eaa44
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
@@ -0,0 +1,40 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Generic dynamic event - add/remove eprobe events
+# requires: dynamic_events events/syscalls/sys_enter_openat "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
+
+echo 0 > events/enable
+
+clear_dynamic_events
+
+SYSTEM="syscalls"
+EVENT="sys_enter_openat"
+FIELD="filename"
+EPROBE="eprobe_open"
+
+echo "e:$EPROBE $SYSTEM/$EVENT file=+0(\$filename):ustring" >> dynamic_events
+
+grep -q "$EPROBE" dynamic_events
+test -d events/eprobes/$EPROBE
+
+echo 1 > events/eprobes/$EPROBE/enable
+ls
+echo 0 > events/eprobes/$EPROBE/enable
+
+content=`grep '^ *ls-' trace | grep 'file='`
+nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
+
+if [ -z "$content" ]; then
+	exit_fail
+fi
+
+if [ ! -z "$nocontent" ]; then
+	exit_fail
+fi
+
+echo "-:$EPROBE" >> dynamic_events
+
+! grep -q "$EPROBE" dynamic_events
+! test -d events/eprobes/$EPROBE
+
+clear_trace
-- 
2.30.2

[PATCH v9 5/6] selftests/ftrace: Add selftest for testing eprobe events on synthetic events

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add a test to test event probes, by creating a synthetic event across
sys_enter_openat and sys_exit_openat that passes the filename pointer from
the enter of the system call to the exit, and then add an event probe to
the synthetic event to make sure that the file name is seen.

Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org/

Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .../inter-event/trigger-synthetic-eprobe.tc   | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc

diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
new file mode 100644
index 000000000000..914fe2e5d030
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
@@ -0,0 +1,53 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: event trigger - test inter-event histogram trigger eprobe on synthetic event
+# requires: dynamic_events synthetic_events events/syscalls/sys_enter_openat/hist "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
+
+echo 0 > events/enable
+
+clear_dynamic_events
+
+SYSTEM="syscalls"
+START="sys_enter_openat"
+END="sys_exit_openat"
+FIELD="filename"
+SYNTH="synth_open"
+EPROBE="eprobe_open"
+
+echo "$SYNTH u64 filename; s64 ret;" > synthetic_events
+echo "hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger
+echo "hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger
+
+echo "e:$EPROBE synthetic/$SYNTH file=+0(\$filename):ustring ret=\$ret:s64" >> dynamic_events
+
+grep -q "$SYNTH" dynamic_events
+grep -q "$EPROBE" dynamic_events
+test -d events/synthetic/$SYNTH
+test -d events/eprobes/$EPROBE
+
+echo 1 > events/eprobes/$EPROBE/enable
+ls
+echo 0 > events/eprobes/$EPROBE/enable
+
+content=`grep '^ *ls-' trace | grep 'file='`
+nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
+
+if [ -z "$content" ]; then
+	exit_fail
+fi
+
+if [ ! -z "$nocontent" ]; then
+	exit_fail
+fi
+
+echo "-:$EPROBE" >> dynamic_events
+echo '!'"hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger
+echo '!'"hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger
+echo '!'"$SYNTH u64 filename; s64 ret;" >> synthetic_events
+
+! grep -q "$SYNTH" dynamic_events
+! grep -q "$EPROBE" dynamic_events
+! test -d events/synthetic/$SYNTH
+! test -d events/eprobes/$EPROBE
+
+clear_trace
-- 
2.30.2

[PATCH v9 6/6] selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add a selftest that makes sure that eprobes and kprobes can not be created
with the same group and name as existing events.

Link: https://lore.kernel.org/linux-kselftest/20210819152825.715290342@goodmis.org/

Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .../ftrace/test.d/dynevent/test_duplicates.tc | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc b/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
new file mode 100644
index 000000000000..db522577ff78
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
@@ -0,0 +1,38 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Generic dynamic event - check if duplicate events are caught
+# requires: dynamic_events "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
+
+echo 0 > events/enable
+
+HAVE_KPROBES=0
+
+if [ -f kprobe_events ]; then
+	HAVE_KPROBES=1
+fi
+
+clear_dynamic_events
+
+# first create dynamic events for eprobes and kprobes.
+
+echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
+
+# Test eprobe for same eprobe, existing kprobe and existing event
+! echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
+! echo 'e:syscalls/sys_enter_open syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
+
+if [ $HAVE_KPROBES -eq 1 ]; then
+    echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
+    ! echo 'e:kgroup/kevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
+
+# Test kprobe for same kprobe, existing eprobe and existing event
+    ! echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
+    ! echo 'p:egroup/eevent vfs_open file=+0($arg2)' >> dynamic_events
+    ! echo 'p:syscalls/sys_enter_open vfs_open file=+0($arg2)' >> dynamic_events
+
+    echo '-:kgroup/kevent' >> dynamic_events
+fi
+
+echo '-:egroup/eevent' >> dynamic_events
+
+clear_trace
-- 
2.30.2

Re: [PATCH v9 5/6] selftests/ftrace: Add selftest for testing eprobe events on synthetic events

[Masami Hiramatsu]

On Fri, 20 Aug 2021 16:46:49 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
> 
> Add a test to test event probes, by creating a synthetic event across
> sys_enter_openat and sys_exit_openat that passes the filename pointer from
> the enter of the system call to the exit, and then add an event probe to
> the synthetic event to make sure that the file name is seen.
> 
> Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org/
> 
> Cc: Shuah Khan <shuah@kernel.org>
> Cc: Shuah Khan <skhan@linuxfoundation.org>
> Cc: linux-kselftest@vger.kernel.org
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

This looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thank you!

> ---
>  .../inter-event/trigger-synthetic-eprobe.tc   | 53 +++++++++++++++++++
>  1 file changed, 53 insertions(+)
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
> new file mode 100644
> index 000000000000..914fe2e5d030
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
> @@ -0,0 +1,53 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: event trigger - test inter-event histogram trigger eprobe on synthetic event
> +# requires: dynamic_events synthetic_events events/syscalls/sys_enter_openat/hist "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
> +
> +echo 0 > events/enable
> +
> +clear_dynamic_events
> +
> +SYSTEM="syscalls"
> +START="sys_enter_openat"
> +END="sys_exit_openat"
> +FIELD="filename"
> +SYNTH="synth_open"
> +EPROBE="eprobe_open"
> +
> +echo "$SYNTH u64 filename; s64 ret;" > synthetic_events
> +echo "hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger
> +echo "hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger
> +
> +echo "e:$EPROBE synthetic/$SYNTH file=+0(\$filename):ustring ret=\$ret:s64" >> dynamic_events
> +
> +grep -q "$SYNTH" dynamic_events
> +grep -q "$EPROBE" dynamic_events
> +test -d events/synthetic/$SYNTH
> +test -d events/eprobes/$EPROBE
> +
> +echo 1 > events/eprobes/$EPROBE/enable
> +ls
> +echo 0 > events/eprobes/$EPROBE/enable
> +
> +content=`grep '^ *ls-' trace | grep 'file='`
> +nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
> +
> +if [ -z "$content" ]; then
> +	exit_fail
> +fi
> +
> +if [ ! -z "$nocontent" ]; then
> +	exit_fail
> +fi
> +
> +echo "-:$EPROBE" >> dynamic_events
> +echo '!'"hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger
> +echo '!'"hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger
> +echo '!'"$SYNTH u64 filename; s64 ret;" >> synthetic_events
> +
> +! grep -q "$SYNTH" dynamic_events
> +! grep -q "$EPROBE" dynamic_events
> +! test -d events/synthetic/$SYNTH
> +! test -d events/eprobes/$EPROBE
> +
> +clear_trace
> -- 
> 2.30.2


-- 
Masami Hiramatsu <mhiramat@kernel.org>

Re: [PATCH v9 4/6] selftests/ftrace: Add test case to test adding and removing of event probe

[Masami Hiramatsu]

On Fri, 20 Aug 2021 16:46:48 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
> 
> Add a test case that adds an event probe, makes sure that it works, and
> then removes it.
> 
> Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org/
> 
> Cc: Shuah Khan <shuah@kernel.org>
> Cc: Shuah Khan <skhan@linuxfoundation.org>
> Cc: linux-kselftest@vger.kernel.org
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

This looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thank you!

> ---
>  .../test.d/dynevent/add_remove_eprobe.tc      | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
> new file mode 100644
> index 000000000000..25a3da4eaa44
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
> @@ -0,0 +1,40 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: Generic dynamic event - add/remove eprobe events
> +# requires: dynamic_events events/syscalls/sys_enter_openat "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
> +
> +echo 0 > events/enable
> +
> +clear_dynamic_events
> +
> +SYSTEM="syscalls"
> +EVENT="sys_enter_openat"
> +FIELD="filename"
> +EPROBE="eprobe_open"
> +
> +echo "e:$EPROBE $SYSTEM/$EVENT file=+0(\$filename):ustring" >> dynamic_events
> +
> +grep -q "$EPROBE" dynamic_events
> +test -d events/eprobes/$EPROBE
> +
> +echo 1 > events/eprobes/$EPROBE/enable
> +ls
> +echo 0 > events/eprobes/$EPROBE/enable
> +
> +content=`grep '^ *ls-' trace | grep 'file='`
> +nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
> +
> +if [ -z "$content" ]; then
> +	exit_fail
> +fi
> +
> +if [ ! -z "$nocontent" ]; then
> +	exit_fail
> +fi
> +
> +echo "-:$EPROBE" >> dynamic_events
> +
> +! grep -q "$EPROBE" dynamic_events
> +! test -d events/eprobes/$EPROBE
> +
> +clear_trace
> -- 
> 2.30.2


-- 
Masami Hiramatsu <mhiramat@kernel.org>

Re: [PATCH v9 6/6] selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes

[Masami Hiramatsu]

On Fri, 20 Aug 2021 16:46:50 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
> 
> Add a selftest that makes sure that eprobes and kprobes can not be created
> with the same group and name as existing events.
> 
> Link: https://lore.kernel.org/linux-kselftest/20210819152825.715290342@goodmis.org/
> 
> Cc: Shuah Khan <shuah@kernel.org>
> Cc: Shuah Khan <skhan@linuxfoundation.org>
> Cc: linux-kselftest@vger.kernel.org
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

OK, this looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thank you,

> ---
>  .../ftrace/test.d/dynevent/test_duplicates.tc | 38 +++++++++++++++++++
>  1 file changed, 38 insertions(+)
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc b/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
> new file mode 100644
> index 000000000000..db522577ff78
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
> @@ -0,0 +1,38 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: Generic dynamic event - check if duplicate events are caught
> +# requires: dynamic_events "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
> +
> +echo 0 > events/enable
> +
> +HAVE_KPROBES=0
> +
> +if [ -f kprobe_events ]; then
> +	HAVE_KPROBES=1
> +fi
> +
> +clear_dynamic_events
> +
> +# first create dynamic events for eprobes and kprobes.
> +
> +echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
> +
> +# Test eprobe for same eprobe, existing kprobe and existing event
> +! echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
> +! echo 'e:syscalls/sys_enter_open syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
> +
> +if [ $HAVE_KPROBES -eq 1 ]; then
> +    echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
> +    ! echo 'e:kgroup/kevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
> +
> +# Test kprobe for same kprobe, existing eprobe and existing event
> +    ! echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
> +    ! echo 'p:egroup/eevent vfs_open file=+0($arg2)' >> dynamic_events
> +    ! echo 'p:syscalls/sys_enter_open vfs_open file=+0($arg2)' >> dynamic_events
> +
> +    echo '-:kgroup/kevent' >> dynamic_events
> +fi
> +
> +echo '-:egroup/eevent' >> dynamic_events
> +
> +clear_trace
> -- 
> 2.30.2


-- 
Masami Hiramatsu <mhiramat@kernel.org>

Re: [PATCH v9 3/6] selftests/ftrace: Fix requirement check of README file

[Masami Hiramatsu]

On Fri, 20 Aug 2021 16:46:47 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
> 
> The selftest for ftrace checks some features by checking if the README has
> text that states the feature is supported by that kernel. Unfortunately,
> this check gives false positives because it many not be checked if there's
> spaces in the string to check. This is due to the compare between the
> required variable with the ":README" string stripped, because neither has
> quotes around them.

Oops, good catch!

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thank you!

> 
> Cc: Shuah Khan <shuah@kernel.org>
> Cc: Shuah Khan <skhan@linuxfoundation.org>
> Cc: linux-kselftest@vger.kernel.org
> Cc: stable@vger.kernel.org
> Fixes: 1b8eec510ba64 ("selftests/ftrace: Support ":README" suffix for requires")
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> ---
>  tools/testing/selftests/ftrace/test.d/functions | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
> index f68d336b961b..000fd05e84b1 100644
> --- a/tools/testing/selftests/ftrace/test.d/functions
> +++ b/tools/testing/selftests/ftrace/test.d/functions
> @@ -137,7 +137,7 @@ check_requires() { # Check required files and tracers
>                  echo "Required tracer $t is not configured."
>                  exit_unsupported
>              fi
> -        elif [ $r != $i ]; then
> +        elif [ "$r" != "$i" ]; then
>              if ! grep -Fq "$r" README ; then
>                  echo "Required feature pattern \"$r\" is not in README."
>                  exit_unsupported
> -- 
> 2.30.2


-- 
Masami Hiramatsu <mhiramat@kernel.org>

Re: [PATCH v9 6/6] selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes

[Steven Rostedt]

On Sat, 21 Aug 2021 10:41:52 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

> OK, this looks good to me.
> 
> Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thanks Masami for your acks, and all the time you spent on reviewing
this series. I'll be add this all to my linux-next queue.

Cheers!

-- Steve