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Message-Id: <20170211003614.6579-7-mcgrof@kernel.org>
Date: Fri, 10 Feb 2017 16:36:11 -0800
From: "Luis R. Rodriguez" <mcgrof@...nel.org>
To: viro@...iv.linux.org.uk, akpm@...ux-foundation.org,
ebiederm@...ssion.com, keescook@...omium.org, acme@...hat.com,
mingo@...nel.org, mgorman@...e.de, subashab@...eaurora.org
Cc: jeyu@...hat.com, rusty@...tcorp.com.au, swhiteho@...hat.com,
deepa.kernel@...il.com, matt@...eblueprint.co.uk,
adobriyan@...il.com, bp@...e.de, dmitry.torokhov@...il.com,
shuah@...nel.org, torvalds@...ux-foundation.org,
linux@...ck-us.net, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
"Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH v2 6/9] test_sysctl: test against PAGE_SIZE for int
Add the following tests to ensure we do not regress:
o Test using a buffer full of space (PAGE_SIZE-1) followed by a
single digit works
o Test using a buffer full of spaces (PAGE_SIZE or over) will fail
As tests increase instead of unloading the module and reloading it
we can just do a shell reset_vals() with a reset to values we know
are set at init on the driver.
Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
tools/testing/selftests/sysctl/sysctl.sh | 65 ++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/tools/testing/selftests/sysctl/sysctl.sh b/tools/testing/selftests/sysctl/sysctl.sh
index f8f29092063d..14b9d875db42 100755
--- a/tools/testing/selftests/sysctl/sysctl.sh
+++ b/tools/testing/selftests/sysctl/sysctl.sh
@@ -46,6 +46,12 @@ function allow_user_defaults()
if [ -z $SYSCTL ]; then
SYSCTL="/proc/sys/debug/test_sysctl"
fi
+ if [ -z $PAGE_SIZE ]; then
+ PAGE_SIZE=$(getconf PAGESIZE)
+ fi
+ if [ -z $MAX_DIGITS ]; then
+ MAX_DIGITS=$(($PAGE_SIZE/8))
+ fi
}
test_reqs()
@@ -60,6 +66,10 @@ test_reqs()
echo "$0: You need perl installed"
exit 1
fi
+ if ! which getconf 2> /dev/null > /dev/null; then
+ echo "$0: You need getconf installed"
+ exit 1
+ fi
}
function load_req_mod()
@@ -74,6 +84,23 @@ function load_req_mod()
fi
}
+reset_vals()
+{
+ VAL=""
+ TRIGGER=$(basename ${TARGET})
+ case "$TRIGGER" in
+ int_0001)
+ VAL="60"
+ ;;
+ string_0001)
+ VAL="(none)"
+ ;;
+ *)
+ ;;
+ esac
+ echo -n $VAL > $TARGET
+}
+
set_orig()
{
if [ ! -z $TARGET ]; then
@@ -195,7 +222,42 @@ run_numerictests()
else
echo "ok"
fi
+ test_rc
+}
+
+# Your test must accept digits 3 and 4 to use this
+run_limit_digit()
+{
+ echo -n "Checking ignoring spaces up to PAGE_SIZE works on write ..."
+ reset_vals
+
+ LIMIT=$((MAX_DIGITS -1))
+ TEST_STR="3"
+ (perl -e 'print " " x '$LIMIT';'; echo "${TEST_STR}") | \
+ dd of="${TARGET}" 2>/dev/null
+
+ if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+ test_rc
+
+ echo -n "Checking passing PAGE_SIZE of spaces fails on write ..."
+ reset_vals
+ LIMIT=$((MAX_DIGITS))
+ TEST_STR="4"
+ (perl -e 'print " " x '$LIMIT';'; echo "${TEST_STR}") | \
+ dd of="${TARGET}" 2>/dev/null
+
+ if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
test_rc
}
@@ -271,15 +333,18 @@ run_stringtests()
sysctl_test_0001()
{
TARGET="${SYSCTL}/int_0001"
+ reset_vals
ORIG=$(cat "${TARGET}")
TEST_STR=$(( $ORIG + 1 ))
run_numerictests
+ run_limit_digit
}
sysctl_test_0002()
{
TARGET="${SYSCTL}/string_0001"
+ reset_vals
ORIG=$(cat "${TARGET}")
TEST_STR="Testing sysctl"
# Only string sysctls support seeking/appending.
--
2.11.0
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