tests/regression/ust/namespaces/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="UST - Namespace contexts change"
  19
  20 CURDIR=$(dirname "$0")/
  21 TESTDIR=$CURDIR/../../..
  22
  23 TESTAPP_PATH="$TESTDIR/utils/testapp"
  24 TESTAPP_NAME="gen-ust-events-ns"
  25 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
  26 NUM_EVENT=1000
  27 EVENT_NAME="tp:tptest"
  28
  29 TESTS_PER_NS=16
  30
  31 NUM_TESTS=$((TESTS_PER_NS * 5))
  32
  33 source "$TESTDIR/utils/utils.sh"
  34
  35 # MUST set TESTDIR before calling those functions
  36
  37 function test_ns()
  38 {
  39         local ns=$1
  40
  41         local session_name="${ns}_ns"
  42         local chan_name="${ns}_ns"
  43         local context_name="${ns}_ns"
  44
  45         local trace_path
  46         local ns_inode
  47         local file_sync_before_last
  48         local file_sync_after_unshare
  49
  50         # Check if the kernel has support for this ns type
  51         if [ ! -f "/proc/$$/ns/$ns" ]; then
  52                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  53                 return
  54         fi
  55
  56         # Get the current ns inode number
  57         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
  58         ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
  59
  60         trace_path=$(mktemp -d)
  61         file_sync_before_last=$(mktemp -u)
  62         file_sync_after_unshare=$(mktemp -u)
  63
  64         start_lttng_sessiond
  65
  66         create_lttng_session_ok "$session_name" "$trace_path"
  67         enable_ust_lttng_channel_ok "$session_name" "$chan_name"
  68         add_context_ust_ok "$session_name" "$chan_name" "$context_name"
  69         enable_ust_lttng_event_ok "$session_name" "$EVENT_NAME" "$chan_name"
  70         start_lttng_tracing_ok "$session_name"
  71
  72         $TESTAPP_BIN -n "$ns" -i $NUM_EVENT -a "$file_sync_after_unshare" -b "$file_sync_before_last" &
  73         app_pid=$!
  74
  75         # Let the app do it's thing before entering the synchronisation loop
  76         sleep 0.5
  77
  78         while [ ! -f "$file_sync_after_unshare" ]; do
  79                 # Break if the app failed / died
  80                 if [ ! -f "/proc/$app_pid" ]; then
  81                         break
  82                 fi
  83                 echo "# Waiting for app..."
  84                 sleep 0.5
  85         done
  86
  87         app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
  88         ok $? "Get current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
  89
  90         test "$ns_inode" != "invalid" && test "$app_ns_inode" != "invalid" && test "$ns_inode" != "$app_ns_inode"
  91         ok $? "Reported namespace inode changed after unshare"
  92
  93         touch "$file_sync_before_last"
  94
  95         # stop and destroy
  96         stop_lttng_tracing_ok "$session_name"
  97         destroy_lttng_session_ok "$session_name"
  98         stop_lttng_sessiond
  99
 100         # Check that the events contain the right namespace inode number
 101         validate_trace_count "${ns}_ns = $ns_inode" "$trace_path" $NUM_EVENT
 102         validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" $NUM_EVENT
 103
 104         rm -rf "$trace_path"
 105         rm -f "$file_sync_before_last"
 106         rm -f "$file_sync_after_unshare"
 107 }
 108
 109
 110 plan_tests $NUM_TESTS
 111
 112 print_test_banner "$TEST_DESC"
 113
 114 isroot=0
 115 if [ "$(id -u)" == "0" ]; then
 116         isroot=1
 117 fi
 118
 119 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 120
 121 system_has_ns=0
 122 if [ -d "/proc/$$/ns" ]; then
 123         system_has_ns=1
 124 fi
 125
 126 skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
 127
 128
 129 test_ns cgroup
 130 test_ns ipc
 131 test_ns mnt
 132 test_ns net
 133 #test_ns pid # pid_ns is special, can't be changed that way
 134 #test_ns user # user_ns can only be change when the app is single threaded, this is always false for an ust instrumented app
 135 test_ns uts