tests/regression/kernel/test_ns_contexts

   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"
   8
   9 CURDIR=$(dirname "$0")/
  10 TESTDIR=$CURDIR/../..
  11
  12 TESTS_PER_NS=11
  13
  14 NUM_TESTS=$((TESTS_PER_NS * 8))
  15
  16 source "$TESTDIR/utils/utils.sh"
  17
  18 # MUST set TESTDIR before calling those functions
  19 function add_context_kernel_skip_ok()
  20 {
  21         local session_name=$1
  22         local channel_name=$2
  23         local context_name=$3
  24         local skip_num=$4
  25
  26         local ret
  27
  28         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" add-context -k \
  29                 -s "$session_name" -c "$channel_name" \
  30                 -t "$context_name"  1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  31         ret=$?
  32
  33         if [ "$ret" == "4" ]; then
  34                 skip 0 "Current kernel doesn't implement '$context_name' context" $((skip_num + 1))
  35         else
  36                 ok $ret "Add context command for type: $context_name"
  37         fi
  38
  39         return $ret
  40 }
  41
  42 function enable_kernel_lttng_event_filter_ok()
  43 {
  44         local session_name=$1
  45         local syscall_name=$2
  46         local channel_name=$3
  47         local filter=$4
  48
  49         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event -k \
  50                 -c "$channel_name" -s "$session_name" \
  51                 --syscall "$syscall_name" \
  52                 -f "$filter" \
  53                 1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  54
  55         ok $? "Add syscall with filter"
  56 }
  57
  58 function test_ns()
  59 {
  60         local ns=$1
  61
  62         local session_name="${ns}_ns"
  63         local chan_name="${ns}_ns"
  64         local context_name="${ns}_ns"
  65
  66         local trace_path
  67         local ns_inode
  68
  69         # Check if the kernel has support for this ns type
  70         if [ ! -f "/proc/$$/ns/$ns" ]; then
  71                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  72                 return
  73         fi
  74
  75         # Get the current ns inode number
  76         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
  77         ok $? "Get current $ns namespace inode: $ns_inode"
  78
  79         trace_path=$(mktemp --tmpdir -d tmp.{FUNCNAME[0]}_trace_path.XXXXXX)
  80
  81         start_lttng_sessiond
  82
  83         create_lttng_session_ok "$session_name" "$trace_path"
  84         enable_kernel_lttng_channel_ok "$session_name" "$chan_name"
  85         add_context_kernel_skip_ok "$session_name" "$chan_name" "$context_name" 4
  86         if [ "$?" != "4" ]; then
  87                 enable_kernel_lttng_event_filter_ok "$session_name" "read" "$chan_name" "\$ctx.$context_name == $ns_inode"
  88                 start_lttng_tracing_ok "$session_name"
  89
  90                 # Make sure there is at least one read syscall
  91                 cat /proc/cmdline >/dev/null
  92
  93                 stop_lttng_tracing_ok "$session_name"
  94
  95                 # Check that the events contain the right namespace inode number
  96                 validate_trace "${ns}_ns = $ns_inode" "$trace_path"
  97         fi
  98
  99         destroy_lttng_session_ok "$session_name"
 100         stop_lttng_sessiond
 101
 102         rm -rf "$trace_path"
 103 }
 104
 105
 106 plan_tests $NUM_TESTS
 107
 108 print_test_banner "$TEST_DESC"
 109
 110
 111 isroot=0
 112 if [ "$(id -u)" == "0" ]; then
 113         isroot=1
 114 fi
 115
 116 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 117
 118
 119 system_has_ns=0
 120 if [ -d "/proc/$$/ns" ]; then
 121         system_has_ns=1
 122 fi
 123
 124 skip $system_has_ns "System does not support namespaces" $NUM_TESTS && exit 0
 125
 126
 127 validate_lttng_modules_present
 128
 129 test_ns cgroup
 130 test_ns ipc
 131 test_ns mnt
 132 test_ns net
 133 test_ns pid
 134 test_ns time
 135 test_ns user
 136 test_ns uts