tests/regression/ust/namespaces/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="UST - Namespace contexts change"
   8
   9 CURDIR=$(dirname "$0")/
  10 TESTDIR=$CURDIR/../../..
  11
  12 TESTAPP_PATH="$TESTDIR/utils/testapp"
  13 TESTAPP_NAME="gen-ust-events-ns"
  14 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
  15 NUM_EVENT=1000
  16 EVENT_NAME="tp:tptest"
  17
  18 TESTS_PER_NS=16
  19
  20 NUM_TESTS=$((TESTS_PER_NS * 5))
  21
  22 source "$TESTDIR/utils/utils.sh"
  23
  24 # MUST set TESTDIR before calling those functions
  25
  26 function test_ns()
  27 {
  28         local ns=$1
  29
  30         local session_name="${ns}_ns"
  31         local chan_name="${ns}_ns"
  32         local context_name="${ns}_ns"
  33
  34         local trace_path
  35         local ns_inode
  36         local file_sync_before_last
  37         local file_sync_after_unshare
  38
  39         # Check if the kernel has support for this ns type
  40         if [ ! -f "/proc/$$/ns/$ns" ]; then
  41                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  42                 return
  43         fi
  44
  45         # Get the current ns inode number
  46         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
  47         ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
  48
  49         trace_path=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")
  50         file_sync_before_last=$(mktemp --tmpdir -u "tmp.${FUNCNAME[0]}_sync_before_last.XXXXXX")
  51         file_sync_after_unshare=$(mktemp --tmpdir -u "tmp.${FUNCNAME[0]}_sync_after_unshare.XXXXXX")
  52
  53         start_lttng_sessiond
  54
  55         create_lttng_session_ok "$session_name" "$trace_path"
  56         enable_ust_lttng_channel_ok "$session_name" "$chan_name"
  57         add_context_ust_ok "$session_name" "$chan_name" "$context_name"
  58         enable_ust_lttng_event_ok "$session_name" "$EVENT_NAME" "$chan_name"
  59         start_lttng_tracing_ok "$session_name"
  60
  61         $TESTAPP_BIN -n "$ns" -i $NUM_EVENT -a "$file_sync_after_unshare" -b "$file_sync_before_last" &
  62         app_pid=$!
  63
  64         while [ ! -f "$file_sync_after_unshare" ]; do
  65                 # Break if the app failed / died
  66                 if ! kill -0 "$app_pid" ; then
  67                         echo "# App failed"
  68                         break
  69                 fi
  70                 echo "# Waiting for app..."
  71                 sleep 0.5
  72         done
  73
  74         app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
  75         ok $? "Get current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
  76
  77         test "$ns_inode" != "invalid" && test "$app_ns_inode" != "invalid" && test "$ns_inode" != "$app_ns_inode"
  78         ok $? "Reported namespace inode changed after unshare"
  79
  80         touch "$file_sync_before_last"
  81
  82         # Wait for the test app to generate all expected events and exit.
  83         wait $app_pid
  84
  85         # stop and destroy
  86         stop_lttng_tracing_ok "$session_name"
  87         destroy_lttng_session_ok "$session_name"
  88         stop_lttng_sessiond
  89
  90         # Check that the events contain the right namespace inode number
  91         validate_trace_count "${ns}_ns = $ns_inode" "$trace_path" $NUM_EVENT
  92         validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" $NUM_EVENT
  93
  94         rm -rf "$trace_path"
  95         rm -f "$file_sync_before_last"
  96         rm -f "$file_sync_after_unshare"
  97 }
  98
  99
 100 plan_tests $NUM_TESTS
 101
 102 print_test_banner "$TEST_DESC"
 103
 104 isroot=0
 105 if [ "$(id -u)" == "0" ]; then
 106         isroot=1
 107 fi
 108
 109 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 110
 111 system_has_ns=0
 112 if [ -d "/proc/$$/ns" ]; then
 113         system_has_ns=1
 114 fi
 115
 116 skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
 117
 118
 119 test_ns cgroup
 120 test_ns ipc
 121 test_ns mnt
 122 test_ns net
 123 #test_ns pid # pid_ns is special, can't be changed that way
 124 #test_ns time # time_ns is special, can't be changed that way
 125 #test_ns user # user_ns can only be change when the app is single threaded, this is always false for an ust instrumented app
 126 test_ns uts