tests/regression/kernel/test_ns_contexts_change

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # SPDX-License-Identifier: LGPL-2.1-only
   6
   7 TEST_DESC="Kernel tracer - Namespace contexts change"
   8
   9 CURDIR=$(dirname "$0")/
  10 TESTDIR=$CURDIR/../..
  11
  12 TESTAPP_PATH="$TESTDIR/utils/testapp"
  13 TESTAPP_NAME="gen-ns-events"
  14 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
  15
  16 TESTS_PER_NS=19
  17
  18 NUM_TESTS=$((TESTS_PER_NS * 6))
  19
  20 source "$TESTDIR/utils/utils.sh"
  21
  22 # MUST set TESTDIR before calling those functions
  23
  24 function add_context_kernel_skip_ok()
  25 {
  26         local session_name=$1
  27         local channel_name=$2
  28         local context_name=$3
  29         local skip_num=$4
  30
  31         local ret
  32
  33         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" add-context -k \
  34                 -s "$session_name" -c "$channel_name" \
  35                 -t "$context_name"  1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  36         ret=$?
  37
  38         if [ "$ret" == "4" ]; then
  39                 skip 0 "Current kernel doesn't implement '$context_name' context" $((skip_num + 1))
  40         else
  41                 ok $ret "Add context command for type: $context_name"
  42         fi
  43
  44         return $ret
  45 }
  46
  47 function enable_kernel_lttng_event_filter_ok()
  48 {
  49         local session_name=$1
  50         local syscall_name=$2
  51         local channel_name=$3
  52         local filter=$4
  53
  54         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event -k \
  55                 -c "$channel_name" -s "$session_name" \
  56                 --syscall "$syscall_name" \
  57                 -f "$filter" \
  58                 1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  59
  60         ok $? "Add syscall with filter"
  61 }
  62
  63 function test_ns()
  64 {
  65         local ns=$1
  66
  67         local session_name="${ns}_ns"
  68         local chan_name="${ns}_ns"
  69         local context_name="${ns}_ns"
  70
  71         local trace_path
  72         local ns_inode
  73         local file_sync_wait_before_unshare
  74         local file_sync_wait_after_unshare
  75         local file_sync_signal_after_unshare
  76
  77         # Check if the kernel has support for this ns type
  78         if [ ! -f "/proc/$$/ns/$ns" ]; then
  79                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  80                 return
  81         fi
  82
  83         trace_path=$(mktemp -d)
  84         file_sync_wait_before_unshare=$(mktemp -u)
  85         file_sync_wait_after_unshare=$(mktemp -u)
  86         file_sync_signal_after_unshare=$(mktemp -u)
  87
  88         # Get the current ns inode number
  89         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
  90         ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
  91
  92         $TESTAPP_BIN -n "$ns" -a "$file_sync_wait_after_unshare" -b "$file_sync_wait_before_unshare" -s "$file_sync_signal_after_unshare" &
  93         ok $? "Launch test app."
  94         app_pid=$!
  95
  96         app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
  97         ok $? "Get app current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
  98
  99         start_lttng_sessiond
 100
 101         create_lttng_session_ok "$session_name" "$trace_path"
 102         enable_kernel_lttng_channel_ok "$session_name" "$chan_name"
 103         add_context_kernel_skip_ok "$session_name" "$chan_name" "$context_name" 10
 104         if [ "$?" != "4" ]; then
 105                 lttng_enable_kernel_syscall_ok "$session_name" "unshare" "$chan_name"
 106                 lttng_track_pid_ok "$app_pid"
 107                 start_lttng_tracing_ok "$session_name"
 108
 109                 touch "$file_sync_wait_before_unshare"
 110
 111                 while [ ! -f "$file_sync_signal_after_unshare" ]; do
 112                         # Break if the app failed / died
 113                         if ! kill -0 "$app_pid" ; then
 114                                 break
 115                                 echo "# App failed"
 116                         fi
 117                         echo "# Waiting for app..."
 118                         sleep 0.5
 119                 done
 120
 121                 app_unshare_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
 122                 ok $? "Get app current $ns namespace inode: $app_unshare_ns_inode" || app_unshare_ns_inode="invalid"
 123
 124                 test "$app_ns_inode" != "invalid" && test "$app_unshare_ns_inode" != "invalid" && test "$app_ns_inode" != "$app_unshare_ns_inode"
 125                 ok $? "Reported namespace inode changed after unshare"
 126
 127                 touch "$file_sync_wait_after_unshare"
 128
 129                 stop_lttng_tracing_ok "$session_name"
 130
 131                 # Check that the events contain the right namespace inode number
 132                 validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" 1
 133                 validate_trace_count "${ns}_ns = $app_unshare_ns_inode" "$trace_path" 1
 134         fi
 135
 136         # stop and destroy
 137         destroy_lttng_session_ok "$session_name"
 138         stop_lttng_sessiond
 139
 140         rm -rf "$trace_path"
 141         rm -f "$file_sync_wait_after_unshare"
 142         rm -f "$file_sync_wait_before_unshare"
 143         rm -f "$file_sync_signal_after_unshare"
 144 }
 145
 146
 147 plan_tests $NUM_TESTS
 148
 149 print_test_banner "$TEST_DESC"
 150
 151
 152 isroot=0
 153 if [ "$(id -u)" == "0" ]; then
 154         isroot=1
 155 fi
 156
 157 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 158
 159
 160 system_has_ns=0
 161 if [ -d "/proc/$$/ns" ]; then
 162         system_has_ns=1
 163 fi
 164
 165 skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
 166
 167
 168 validate_lttng_modules_present
 169
 170 test_ns cgroup
 171 test_ns ipc
 172 test_ns mnt
 173 test_ns net
 174 #test_ns pid # pid_ns is special, can't be changed that way
 175 test_ns user
 176 test_ns uts