tests/regression/kernel/test_ns_contexts

   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"
  19
  20 CURDIR=$(dirname "$0")/
  21 TESTDIR=$CURDIR/../..
  22
  23 TESTS_PER_NS=11
  24
  25 NUM_TESTS=$((TESTS_PER_NS * 7))
  26
  27 source "$TESTDIR/utils/utils.sh"
  28
  29 # MUST set TESTDIR before calling those functions
  30 function add_context_kernel_skip_ok()
  31 {
  32         local session_name=$1
  33         local channel_name=$2
  34         local context_name=$3
  35         local skip_num=$4
  36
  37         local ret
  38
  39         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" add-context -k \
  40                 -s "$session_name" -c "$channel_name" \
  41                 -t "$context_name"  1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  42         ret=$?
  43
  44         if [ "$ret" == "4" ]; then
  45                 skip 0 "Current kernel doesn't implement '$context_name' context" $((skip_num + 1))
  46         else
  47                 ok $ret "Add context command for type: $context_name"
  48         fi
  49
  50         return $ret
  51 }
  52
  53 function enable_kernel_lttng_event_filter_ok()
  54 {
  55         local session_name=$1
  56         local syscall_name=$2
  57         local channel_name=$3
  58         local filter=$4
  59
  60         "$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event -k \
  61                 -c "$channel_name" -s "$session_name" \
  62                 --syscall "$syscall_name" \
  63                 -f "$filter" \
  64                 1>"$OUTPUT_DEST" 2>"$ERROR_OUTPUT_DEST"
  65
  66         ok $? "Add syscall with filter"
  67 }
  68
  69 function test_ns()
  70 {
  71         local ns=$1
  72
  73         local session_name="${ns}_ns"
  74         local chan_name="${ns}_ns"
  75         local context_name="${ns}_ns"
  76
  77         local trace_path
  78         local ns_inode
  79
  80         # Check if the kernel has support for this ns type
  81         if [ ! -f "/proc/$$/ns/$ns" ]; then
  82                 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
  83                 return
  84         fi
  85
  86         # Get the current ns inode number
  87         ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
  88         ok $? "Get current $ns namespace inode: $ns_inode"
  89
  90         trace_path=$(mktemp -d)
  91
  92         start_lttng_sessiond
  93
  94         create_lttng_session_ok "$session_name" "$trace_path"
  95         enable_kernel_lttng_channel_ok "$session_name" "$chan_name"
  96         add_context_kernel_skip_ok "$session_name" "$chan_name" "$context_name" 4
  97         if [ "$?" != "4" ]; then
  98                 enable_kernel_lttng_event_filter_ok "$session_name" "read" "$chan_name" "\$ctx.$context_name == $ns_inode"
  99                 start_lttng_tracing_ok "$session_name"
 100
 101                 # Make sure there is at least one read syscall
 102                 cat /proc/cmdline >/dev/null
 103
 104                 stop_lttng_tracing_ok "$session_name"
 105
 106                 # Check that the events contain the right namespace inode number
 107                 validate_trace "${ns}_ns = $ns_inode" "$trace_path"
 108         fi
 109
 110         destroy_lttng_session_ok "$session_name"
 111         stop_lttng_sessiond
 112
 113         rm -rf "$trace_path"
 114 }
 115
 116
 117 plan_tests $NUM_TESTS
 118
 119 print_test_banner "$TEST_DESC"
 120
 121
 122 isroot=0
 123 if [ "$(id -u)" == "0" ]; then
 124         isroot=1
 125 fi
 126
 127 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
 128
 129
 130 system_has_ns=0
 131 if [ -d "/proc/$$/ns" ]; then
 132         system_has_ns=1
 133 fi
 134
 135 skip $system_has_ns "System does not support namespaces" $NUM_TESTS && exit 0
 136
 137
 138 validate_lttng_modules_present
 139
 140 test_ns cgroup
 141 test_ns ipc
 142 test_ns mnt
 143 test_ns net
 144 test_ns pid
 145 test_ns user
 146 test_ns uts