ftracetest/tools/selftests: Self tests to test ftrace

index 670b3dcce2de..bb455d0ae12a 100644
@@ -9310,6 +9310,7 @@ F:	include/*/ftrace.h
 F:	include/linux/trace*.h
 F:	include/trace/
 F:	kernel/trace/
+F:	tools/testing/selftests/ftrace/
 
 TRIVIAL PATCHES
 M:	Jiri Kosina <[email protected]>

index 36ff2e4c7b6f..45f145c6f843 100644
@@ -14,6 +14,7 @@ TARGETS += powerpc
 TARGETS += user
 TARGETS += sysctl
 TARGETS += firmware
+TARGETS += ftrace
 
 TARGETS_HOTPLUG = cpu-hotplug
 TARGETS_HOTPLUG += memory-hotplug

new file mode 100644
index 000000000000..76cc9f156267
@@ -0,0 +1,7 @@
+all:
+
+run_tests:
+	@/bin/sh ./ftracetest || echo "ftrace selftests: [FAIL]"
+
+clean:
+	rm -rf logs/*

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new file mode 100644
index 000000000000..ce5f735b2e65
@@ -0,0 +1,4 @@
+#!/bin/sh
+# description: %HERE DESCRIBE WHAT THIS DOES%
+# you have to add ".tc" extention for your testcase file
+exit 0 # Return 0 if the test is passed, otherwise return !0

new file mode 100644
index 000000000000..9980ff14ae44
@@ -0,0 +1,3 @@
+#!/bin/sh
+# description: Basic trace file check
+test -f README -a -f trace -a -f tracing_on -a -f trace_pipe

new file mode 100644
index 000000000000..b04f30df0db3
@@ -0,0 +1,6 @@
+#!/bin/sh
+# description: Basic test for tracers
+for t in `cat available_tracers`; do
+  echo $t > current_tracer || exit 1
+done
+echo nop > current_tracer

new file mode 100644
index 000000000000..0c1a3a207636
@@ -0,0 +1,8 @@
+#!/bin/sh
+# description: Basic trace clock test
+[ -f trace_clock ] || exit 1
+for c in `cat trace_clock | tr  -d \[\]`; do
+  echo $c > trace_clock || exit 1
+  grep '\['$c'\]' trace_clock || exit 1
+done
+echo local > trace_clock

new file mode 100644
index 000000000000..5ddfb476eceb
@@ -0,0 +1,11 @@
+#!/bin/sh
+# description: Kprobe dynamic event - adding and removing
+
+[ -f kprobe_events ] || exit 1
+
+echo 0 > events/enable || exit 1
+echo > kprobe_events || exit 1
+echo p:myevent do_fork > kprobe_events || exit 1
+grep myevent kprobe_events || exit 1
+[ -d events/kprobes/myevent ] || exit 1
+echo > kprobe_events

new file mode 100644
index 000000000000..588fde97e93f
@@ -0,0 +1,14 @@
+#!/bin/sh
+# description: Kprobe dynamic event - busy event check
+
+[ -f kprobe_events ] || exit 1
+
+echo 0 > events/enable || exit 1
+echo > kprobe_events || exit 1
+echo p:myevent do_fork > kprobe_events || exit 1
+[ -d events/kprobes/myevent ] || exit 1
+echo 1 > events/kprobes/myevent/enable || exit 1
+echo > kprobe_events && exit 1 # this must fail
+echo 0 > events/kprobes/myevent/enable || exit 1
+echo > kprobe_events # this must succeed
+

index b8631f03e754..182e76fa4b82 100644
@@ -38,6 +38,43 @@ extension) and rewrite the test description line.
  * The test cases should run on dash (busybox shell) for testing on
    minimal cross-build environments.
 
+ * Note that the tests are run with "set -e" (errexit) option. If any
+   command fails, the test will be terminated immediately.
+
+ * The tests can return some result codes instead of pass or fail by
+   using exit_unresolved, exit_untested, exit_unsupported and exit_xfail.
+
+Result code
+===========
+
+Ftracetest supports following result codes.
+
+ * PASS: The test succeeded as expected. The test which exits with 0 is
+         counted as passed test.
+
+ * FAIL: The test failed, but was expected to succeed. The test which exits
+         with !0 is counted as failed test.
+
+ * UNRESOLVED: The test produced unclear or intermidiate results.
+             for example, the test was interrupted
+                       or the test depends on a previous test, which failed.
+                       or the test was set up incorrectly
+             The test which is in above situation, must call exit_unresolved.
+
+ * UNTESTED: The test was not run, currently just a placeholder.
+             In this case, the test must call exit_untested.
+
+ * UNSUPPORTED: The test failed because of lack of feature.
+               In this case, the test must call exit_unsupported.
+
+ * XFAIL: The test failed, and was expected to fail.
+          To return XFAIL, call exit_xfail from the test.
+
+There are some sample test scripts for result code under samples/.
+You can also run samples as below:
+
+  # ./ftracetest samples/
+
 TODO
 ====
 

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new file mode 100644
index 000000000000..15e35b956e05
@@ -0,0 +1,4 @@
+#!/bin/sh
+# description: failure-case example
+cat non-exist-file
+echo "this is not executed"

new file mode 100644
index 000000000000..d01549370041
@@ -0,0 +1,3 @@
+#!/bin/sh
+# description: pass-case example
+return 0

new file mode 100644
index 000000000000..41e99d3358d1
@@ -0,0 +1,4 @@
+#!/bin/sh
+# description: unresolved-case example
+trap exit_unresolved INT
+kill -INT $PID

new file mode 100644
index 000000000000..45910ff13328
@@ -0,0 +1,3 @@
+#!/bin/sh
+# description: unsupported-case example
+exit_unsupported

new file mode 100644
index 000000000000..35a45946ec60
@@ -0,0 +1,3 @@
+#!/bin/sh
+# description: untested-case example
+exit_untested

new file mode 100644
index 000000000000..9dd395323259
@@ -0,0 +1,3 @@
+#!/bin/sh
+# description: xfail-case example
+cat non-exist-file || exit_xfail

index b04f30df0db3..bf9a7b037924 100644
@@ -1,6 +1,7 @@
 #!/bin/sh
 # description: Basic test for tracers
+test -f available_tracers
 for t in `cat available_tracers`; do
-  echo $t > current_tracer || exit 1
+  echo $t > current_tracer
 done
 echo nop > current_tracer

index 0c1a3a207636..bde6625d9785 100644
@@ -1,8 +1,8 @@
 #!/bin/sh
 # description: Basic trace clock test
-[ -f trace_clock ] || exit 1
+test -f trace_clock
 for c in `cat trace_clock | tr  -d \[\]`; do
-  echo $c > trace_clock || exit 1
-  grep '\['$c'\]' trace_clock || exit 1
+  echo $c > trace_clock
+  grep '\['$c'\]' trace_clock
 done
 echo local > trace_clock

index 5ddfb476eceb..1b8b665ab2b3 100644
@@ -1,11 +1,11 @@
 #!/bin/sh
 # description: Kprobe dynamic event - adding and removing
 
-[ -f kprobe_events ] || exit 1
+[ -f kprobe_events ] || exit_unsupported # this is configurable
 
-echo 0 > events/enable || exit 1
-echo > kprobe_events || exit 1
-echo p:myevent do_fork > kprobe_events || exit 1
-grep myevent kprobe_events || exit 1
-[ -d events/kprobes/myevent ] || exit 1
+echo 0 > events/enable
+echo > kprobe_events
+echo p:myevent do_fork > kprobe_events
+grep myevent kprobe_events
+test -d events/kprobes/myevent
 echo > kprobe_events

index 588fde97e93f..b55c84003587 100644
@@ -1,14 +1,13 @@
 #!/bin/sh
 # description: Kprobe dynamic event - busy event check
 
-[ -f kprobe_events ] || exit 1
+[ -f kprobe_events ] || exit_unsupported
 
-echo 0 > events/enable || exit 1
-echo > kprobe_events || exit 1
-echo p:myevent do_fork > kprobe_events || exit 1
-[ -d events/kprobes/myevent ] || exit 1
-echo 1 > events/kprobes/myevent/enable || exit 1
+echo 0 > events/enable
+echo > kprobe_events
+echo p:myevent do_fork > kprobe_events
+test -d events/kprobes/myevent
+echo 1 > events/kprobes/myevent/enable
 echo > kprobe_events && exit 1 # this must fail
-echo 0 > events/kprobes/myevent/enable || exit 1
+echo 0 > events/kprobes/myevent/enable
 echo > kprobe_events # this must succeed
-

index ce5f735b2e65..5448f7abad5f 100644
@@ -1,4 +1,9 @@
 #!/bin/sh
 # description: %HERE DESCRIBE WHAT THIS DOES%
 # you have to add ".tc" extention for your testcase file
+# Note that all tests are run with "errexit" option.
+
 exit 0 # Return 0 if the test is passed, otherwise return !0
+# If the test could not run because of lack of feature, call exit_unsupported
+# If the test returned unclear results, call exit_unresolved
+# If the test is a dummy, or a placeholder, call exit_untested

new file mode 100644
index 000000000000..a603d3f8db7b
@@ -0,0 +1,16 @@
+#!/bin/sh
+# description: Kprobe dynamic event with arguments
+
+[ -f kprobe_events ] || exit_unsupported # this is configurable
+
+echo 0 > events/enable
+echo > kprobe_events
+echo 'p:testprobe do_fork $stack $stack0 +0($stack)' > kprobe_events
+grep testprobe kprobe_events
+test -d events/kprobes/testprobe
+echo 1 > events/kprobes/testprobe/enable
+( echo "forked")
+echo 0 > events/kprobes/testprobe/enable
+echo "-:testprobe" >> kprobe_events
+test -d events/kprobes/testprobe && exit 1 || exit 0
+

new file mode 100644
index 000000000000..283c29e7f7c4
@@ -0,0 +1,15 @@
+#!/bin/sh
+# description: Kretprobe dynamic event with arguments
+
+[ -f kprobe_events ] || exit_unsupported # this is configurable
+
+echo 0 > events/enable
+echo > kprobe_events
+echo 'r:testprobe2 do_fork $retval' > kprobe_events
+grep testprobe2 kprobe_events
+test -d events/kprobes/testprobe2
+echo 1 > events/kprobes/testprobe2/enable
+( echo "forked")
+echo 0 > events/kprobes/testprobe2/enable
+echo '-:testprobe2' >> kprobe_events
+test -d events/kprobes/testprobe2 && exit 1 || exit 0