common/rc: report kmemleak errors

[xfstests-dev.git] / common / rc

diff --git a/common/rc b/common/rc
index 77a4eb4338fc263af8175cd0ae1bf522e205c069..2e3a83aefd6325658d629866bd624aad6a722648 100644 (file)
--- a/common/rc
+++ b/common/rc
@@ -3438,6 +3438,66 @@ _check_dmesg()
        fi
 }
 
+# capture the kmemleak report
+_capture_kmemleak()
+{
+       local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+       local _leak_file="$1"
+
+       # Tell the kernel to scan for memory leaks.  Apparently the write
+       # returns before the scan is complete, so do it twice in the hopes
+       # that twice is enough to capture all the leaks.
+       echo "scan" > "${_kern_knob}"
+       cat "${_kern_knob}" > /dev/null
+       echo "scan" > "${_kern_knob}"
+       cat "${_kern_knob}" > "${_leak_file}.tmp"
+       if [ -s "${_leak_file}.tmp" ]; then
+               cat > "${_leak_file}" << ENDL
+EXPERIMENTAL kmemleak reported some memory leaks!  Due to the way kmemleak
+works, the leak might be from an earlier test, or something totally unrelated.
+ENDL
+               cat "${_leak_file}.tmp" >> "${_leak_file}"
+               rm -rf "${_leak_file}.tmp"
+       fi
+       echo "clear" > "${_kern_knob}"
+}
+
+# set up kmemleak
+_init_kmemleak()
+{
+       local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+
+       if [ ! -w "${_kern_knob}" ]; then
+               return 0
+       fi
+
+       # Disable the automatic scan so that we can control it completely,
+       # then dump all the leaks recorded so far.
+       echo "scan=off" > "${_kern_knob}"
+       _capture_kmemleak /dev/null
+}
+
+# check kmemleak log
+_check_kmemleak()
+{
+       local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+       local _leak_file="${seqres}.kmemleak"
+
+       if [ ! -w "${_kern_knob}" ]; then
+               return 0
+       fi
+
+       # Capture and report any leaks
+       _capture_kmemleak "${_leak_file}"
+       if [ -s "${_leak_file}" ]; then
+               _dump_err "_check_kmemleak: something found in kmemleak (see ${_leak_file})"
+               return 1
+       else
+               rm -f "${_leak_file}"
+               return 0
+       fi
+}
+
 # don't check dmesg log after test
 _disable_dmesg_check()
 {