| 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 |