tests/regression/kernel/test_ns_contexts_change

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # This library is free software; you can redistribute it and/or modify it under
   6 # the terms of the GNU Lesser General Public License as published by the Free
   7 # Software Foundation; version 2.1 of the License.
   8 #
   9 # This library is distributed in the hope that it will be useful, but WITHOUT
  10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11 # FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  12 # details.
  13 #
  14 # You should have received a copy of the GNU Lesser General Public License
  15 # along with this library; if not, write to the Free Software Foundation, Inc.,
  16 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  17
  18 TEST_DESC="Kernel tracer - Namespace contexts change"
  19
  20 CURDIR=$(dirname "$0")/
  21 TESTDIR=$CURDIR/../..
  22
  23 TESTAPP_PATH="$TESTDIR/utils/testapp"
  24 TESTAPP_NAME="gen-ns-events"
  25 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
  26
  27 TESTS_PER_NS=19
  28
  29 NUM_TESTS=$((TESTS_PER_NS * 6))
  30
  31 source "$TESTDIR/utils/utils.sh"
  32
  33 # MUST set TESTDIR before calling those functions
  34
  35 function add_context_kernel_skip_ok()
  36 {
  37         local session_name=$1
  38         local channel_name=$2
  39         local context_name=$3
  40         local skip_num=$4
  41
  42         local ret
  43
  44         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" add-context -k \
  45                 -s "$session_name" -c "$channel_name" \
  46                 -t "$context_name"  1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  47         ret=$?
  48
  49         if [ "$ret" == "4" ]; then
  50                 skip 0 "Current kernel doesn't implement '$context_name' context" $((skip_num + 1))
  51         else
  52                 ok $ret "Add context command for type: $context_name"
  53         fi
  54
  55         return $ret
  56 }
  57
  58 function enable_kernel_lttng_event_filter_ok()
  59 {
  60         local session_name=$1
  61         local syscall_name=$2
  62         local channel_name=$3
  63         local filter=$4
  64
  65         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event -k \
  66                 -c "$channel_name" -s "$session_name" \
  67                 --syscall "$syscall_name" \
  68                 -f "$filter" \
  69                 1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  70
  71         ok $? "Add syscall with filter"
  72 }
  73
  74 function test_ns()
  75 {
  76         local ns=$1
  77
  78         local session_name="${ns}_ns"
  79         local chan_name="${ns}_ns"
  80         local context_name="${ns}_ns"
  81
  82         local trace_path
  83         local ns_inode
  84         local file_sync_wait_before_unshare
  85         local file_sync_wait_after_unshare
  86         local file_sync_signal_after_unshare
  87
  88         # Check if the kernel has support for this ns type
  89         if [ ! -f "/proc/$$/ns/$ns" ]; then
  90                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  91                 return
  92         fi
  93
  94         trace_path=$(mktemp -d)
  95         file_sync_wait_before_unshare=$(mktemp -u)
  96         file_sync_wait_after_unshare=$(mktemp -u)
  97         file_sync_signal_after_unshare=$(mktemp -u)
  98
  99         # Get the current ns inode number
 100         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
 101         ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
 102
 103         $TESTAPP_BIN -n "$ns" -a "$file_sync_wait_after_unshare" -b "$file_sync_wait_before_unshare" -s "$file_sync_signal_after_unshare" &
 104         ok $? "Launch test app."
 105         app_pid=$!
 106
 107         app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
 108         ok $? "Get app current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
 109
 110         start_lttng_sessiond
 111
 112         create_lttng_session_ok "$session_name" "$trace_path"
 113         enable_kernel_lttng_channel_ok "$session_name" "$chan_name"
 114         add_context_kernel_skip_ok "$session_name" "$chan_name" "$context_name" 10
 115         if [ "$?" != "4" ]; then
 116                 lttng_enable_kernel_syscall_ok "$session_name" "unshare" "$chan_name"
 117                 lttng_track_pid_ok "$app_pid"
 118                 start_lttng_tracing_ok "$session_name"
 119
 120                 touch "$file_sync_wait_before_unshare"
 121
 122                 # Let the app do it's thing before entering the synchronisation loop
 123                 sleep 0.5
 124
 125                 while [ ! -f "$file_sync_signal_after_unshare" ]; do
 126                         # Break if the app failed / died
 127                         if [ ! -f "/proc/$app_pid" ]; then
 128                                 break
 129                         fi
 130                         echo "# Waiting for app..."
 131                         sleep 0.5
 132                 done
 133
 134                 app_unshare_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
 135                 ok $? "Get app current $ns namespace inode: $app_unshare_ns_inode" || app_unshare_ns_inode="invalid"
 136
 137                 test "$app_ns_inode" != "invalid" && test "$app_unshare_ns_inode" != "invalid" && test "$app_ns_inode" != "$app_unshare_ns_inode"
 138                 ok $? "Reported namespace inode changed after unshare"
 139
 140                 touch "$file_sync_wait_after_unshare"
 141
 142                 stop_lttng_tracing_ok "$session_name"
 143
 144                 # Check that the events contain the right namespace inode number
 145                 validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" 1
 146                 validate_trace_count "${ns}_ns = $app_unshare_ns_inode" "$trace_path" 1
 147         fi
 148
 149         # stop and destroy
 150         destroy_lttng_session_ok "$session_name"
 151         stop_lttng_sessiond
 152
 153         rm -rf "$trace_path"
 154         rm -f "$file_sync_wait_after_unshare"
 155         rm -f "$file_sync_wait_before_unshare"
 156         rm -f "$file_sync_signal_after_unshare"
 157 }
 158
 159
 160 plan_tests $NUM_TESTS
 161
 162 print_test_banner "$TEST_DESC"
 163
 164
 165 isroot=0
 166 if [ "$(id -u)" == "0" ]; then
 167         isroot=1
 168 fi
 169
 170 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 171
 172
 173 system_has_ns=0
 174 if [ -d "/proc/$$/ns" ]; then
 175         system_has_ns=1
 176 fi
 177
 178 skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
 179
 180
 181 validate_lttng_modules_present
 182
 183 test_ns cgroup
 184 test_ns ipc
 185 test_ns mnt
 186 test_ns net
 187 #test_ns pid # pid_ns is special, can't be changed that way
 188 test_ns user
 189 test_ns uts