diff options
| -rw-r--r-- | tools/testing/selftests/Makefile | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/sysctl/Makefile | 19 | ||||
| -rw-r--r-- | tools/testing/selftests/sysctl/common_tests | 109 | ||||
| -rw-r--r-- | tools/testing/selftests/sysctl/run_numerictests | 10 | ||||
| -rw-r--r-- | tools/testing/selftests/sysctl/run_stringtests | 77 |
5 files changed, 216 insertions, 0 deletions
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 32487ed18354..e66e710cc595 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -10,6 +10,7 @@ TARGETS += timers TARGETS += vm TARGETS += powerpc TARGETS += user +TARGETS += sysctl all: for TARGET in $(TARGETS); do \ diff --git a/tools/testing/selftests/sysctl/Makefile b/tools/testing/selftests/sysctl/Makefile new file mode 100644 index 000000000000..0a92adaf0865 --- /dev/null +++ b/tools/testing/selftests/sysctl/Makefile @@ -0,0 +1,19 @@ +# Makefile for sysctl selftests. +# Expects kernel.sysctl_writes_strict=1. + +# No binaries, but make sure arg-less "make" doesn't trigger "run_tests". +all: + +# Allow specific tests to be selected. +test_num: + @/bin/sh ./run_numerictests + +test_string: + @/bin/sh ./run_stringtests + +run_tests: all test_num test_string + +# Nothing to clean up. +clean: + +.PHONY: all run_tests clean test_num test_string diff --git a/tools/testing/selftests/sysctl/common_tests b/tools/testing/selftests/sysctl/common_tests new file mode 100644 index 000000000000..17d534b1b7b4 --- /dev/null +++ b/tools/testing/selftests/sysctl/common_tests @@ -0,0 +1,109 @@ +#!/bin/sh + +TEST_FILE=$(mktemp) + +echo "== Testing sysctl behavior against ${TARGET} ==" + +set_orig() +{ + echo "${ORIG}" > "${TARGET}" +} + +set_test() +{ + echo "${TEST_STR}" > "${TARGET}" +} + +verify() +{ + local seen + seen=$(cat "$1") + if [ "${seen}" != "${TEST_STR}" ]; then + return 1 + fi + return 0 +} + +trap 'set_orig; rm -f "${TEST_FILE}"' EXIT + +rc=0 + +echo -n "Writing test file ... " +echo "${TEST_STR}" > "${TEST_FILE}" +if ! verify "${TEST_FILE}"; then + echo "FAIL" >&2 + exit 1 +else + echo "ok" +fi + +echo -n "Checking sysctl is not set to test value ... " +if verify "${TARGET}"; then + echo "FAIL" >&2 + exit 1 +else + echo "ok" +fi + +echo -n "Writing sysctl from shell ... " +set_test +if ! verify "${TARGET}"; then + echo "FAIL" >&2 + exit 1 +else + echo "ok" +fi + +echo -n "Resetting sysctl to original value ... " +set_orig +if verify "${TARGET}"; then + echo "FAIL" >&2 + exit 1 +else + echo "ok" +fi + +# Now that we've validated the sanity of "set_test" and "set_orig", +# we can use those functions to set starting states before running +# specific behavioral tests. + +echo -n "Writing entire sysctl in single write ... " +set_orig +dd if="${TEST_FILE}" of="${TARGET}" bs=4096 2>/dev/null +if ! verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Writing middle of sysctl after synchronized seek ... " +set_test +dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 skip=1 2>/dev/null +if ! verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Writing beyond end of sysctl ... " +set_orig +dd if="${TEST_FILE}" of="${TARGET}" bs=20 seek=2 2>/dev/null +if verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Writing sysctl with multiple long writes ... " +set_orig +(perl -e 'print "A" x 50;'; echo "${TEST_STR}") | \ + dd of="${TARGET}" bs=50 2>/dev/null +if verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi diff --git a/tools/testing/selftests/sysctl/run_numerictests b/tools/testing/selftests/sysctl/run_numerictests new file mode 100644 index 000000000000..8510f93f2d14 --- /dev/null +++ b/tools/testing/selftests/sysctl/run_numerictests @@ -0,0 +1,10 @@ +#!/bin/sh + +SYSCTL="/proc/sys" +TARGET="${SYSCTL}/vm/swappiness" +ORIG=$(cat "${TARGET}") +TEST_STR=$(( $ORIG + 1 )) + +. ./common_tests + +exit $rc diff --git a/tools/testing/selftests/sysctl/run_stringtests b/tools/testing/selftests/sysctl/run_stringtests new file mode 100644 index 000000000000..90a9293d520c --- /dev/null +++ b/tools/testing/selftests/sysctl/run_stringtests @@ -0,0 +1,77 @@ +#!/bin/sh + +SYSCTL="/proc/sys" +TARGET="${SYSCTL}/kernel/domainname" +ORIG=$(cat "${TARGET}") +TEST_STR="Testing sysctl" + +. ./common_tests + +# Only string sysctls support seeking/appending. +MAXLEN=65 + +echo -n "Writing entire sysctl in short writes ... " +set_orig +dd if="${TEST_FILE}" of="${TARGET}" bs=1 2>/dev/null +if ! verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Writing middle of sysctl after unsynchronized seek ... " +set_test +dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 2>/dev/null +if verify "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Checking sysctl maxlen is at least $MAXLEN ... " +set_orig +perl -e 'print "A" x ('"${MAXLEN}"'-2), "B";' | \ + dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null +if ! grep -q B "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Checking sysctl keeps original string on overflow append ... " +set_orig +perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \ + dd of="${TARGET}" bs=$(( MAXLEN - 1 )) 2>/dev/null +if grep -q B "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Checking sysctl stays NULL terminated on write ... " +set_orig +perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \ + dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null +if grep -q B "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +echo -n "Checking sysctl stays NULL terminated on overwrite ... " +set_orig +perl -e 'print "A" x ('"${MAXLEN}"'-1), "BB";' | \ + dd of="${TARGET}" bs=$(( $MAXLEN + 1 )) 2>/dev/null +if grep -q B "${TARGET}"; then + echo "FAIL" >&2 + rc=1 +else + echo "ok" +fi + +exit $rc |