tools/bootconfig/scripts/bconf2ftrace.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 usage() {
   5         echo "Ftrace boottime trace test tool"
   6         echo "Usage: $0 [--apply|--init] [--debug] BOOTCONFIG-FILE"
   7         echo "    --apply: Test actual apply to tracefs (need sudo)"
   8         echo "    --init:  Initialize ftrace before applying (imply --apply)"
   9         exit 1
  10 }
  11
  12 [ $# -eq 0 ] && usage
  13
  14 BCONF=
  15 DEBUG=
  16 APPLY=
  17 INIT=
  18 while [ x"$1" != x ]; do
  19         case "$1" in
  20         "--debug")
  21                 DEBUG=$1;;
  22         "--apply")
  23                 APPLY=$1;;
  24         "--init")
  25                 APPLY=$1
  26                 INIT=$1;;
  27         *)
  28                 [ ! -f $1 ] && usage
  29                 BCONF=$1;;
  30         esac
  31         shift 1
  32 done
  33
  34 if [ x"$APPLY" != x ]; then
  35         if [ `id -u` -ne 0 ]; then
  36                 echo "This must be run by root user. Try sudo." 1>&2
  37                 exec sudo $0 $DEBUG $APPLY $BCONF
  38         fi
  39 fi
  40
  41 run_cmd() { # command
  42         echo "$*"
  43         if [ x"$APPLY" != x ]; then # apply command
  44                 eval $*
  45         fi
  46 }
  47
  48 if [ x"$DEBUG" != x ]; then
  49         set -x
  50 fi
  51
  52 TRACEFS=`grep -m 1 -w tracefs /proc/mounts | cut -f 2 -d " "`
  53 if [ -z "$TRACEFS" ]; then
  54         if ! grep -wq debugfs /proc/mounts; then
  55                 echo "Error: No tracefs/debugfs was mounted." 1>&2
  56                 exit 1
  57         fi
  58         TRACEFS=`grep -m 1 -w debugfs /proc/mounts | cut -f 2 -d " "`/tracing
  59         if [ ! -d $TRACEFS ]; then
  60                 echo "Error: ftrace is not enabled on this kernel." 1>&2
  61                 exit 1
  62         fi
  63 fi
  64
  65 if [ x"$INIT" != x ]; then
  66         . `dirname $0`/ftrace.sh
  67         (cd $TRACEFS; initialize_ftrace)
  68 fi
  69
  70 . `dirname $0`/xbc.sh
  71
  72 ######## main #########
  73 set -e
  74
  75 xbc_init $BCONF
  76
  77 set_value_of() { # key file
  78         if xbc_has_key $1; then
  79                 val=`xbc_get_val $1 1`
  80                 run_cmd "echo '$val' >> $2"
  81         fi
  82 }
  83
  84 set_array_of() { # key file
  85         if xbc_has_key $1; then
  86                 xbc_get_val $1 | while read line; do
  87                         run_cmd "echo '$line' >> $2"
  88                 done
  89         fi
  90 }
  91
  92 compose_synth() { # event_name branch
  93         echo -n "$1 "
  94         xbc_get_val $2 | while read field; do echo -n "$field; "; done
  95 }
  96
  97 setup_event() { # prefix group event [instance]
  98         branch=$1.$2.$3
  99         if [ "$4" ]; then
 100                 eventdir="$TRACEFS/instances/$4/events/$2/$3"
 101         else
 102                 eventdir="$TRACEFS/events/$2/$3"
 103         fi
 104         case $2 in
 105         kprobes)
 106                 xbc_get_val ${branch}.probes | while read line; do
 107                         run_cmd "echo 'p:kprobes/$3 $line' >> $TRACEFS/kprobe_events"
 108                 done
 109                 ;;
 110         synthetic)
 111                 run_cmd "echo '`compose_synth $3 ${branch}.fields`' >> $TRACEFS/synthetic_events"
 112                 ;;
 113         esac
 114
 115         set_value_of ${branch}.filter ${eventdir}/filter
 116         set_array_of ${branch}.actions ${eventdir}/trigger
 117
 118         if xbc_has_key ${branch}.enable; then
 119                 run_cmd "echo 1 > ${eventdir}/enable"
 120         fi
 121 }
 122
 123 setup_events() { # prefix("ftrace" or "ftrace.instance.INSTANCE") [instance]
 124         prefix="${1}.event"
 125         if xbc_has_branch ${1}.event; then
 126                 for grpev in `xbc_subkeys ${1}.event 2`; do
 127                         setup_event $prefix ${grpev%.*} ${grpev#*.} $2
 128                 done
 129         fi
 130 }
 131
 132 size2kb() { # size[KB|MB]
 133         case $1 in
 134         *KB)
 135                 echo ${1%KB};;
 136         *MB)
 137                 expr ${1%MB} \* 1024;;
 138         *)
 139                 expr $1 / 1024 ;;
 140         esac
 141 }
 142
 143 setup_instance() { # [instance]
 144         if [ "$1" ]; then
 145                 instance="ftrace.instance.${1}"
 146                 instancedir=$TRACEFS/instances/$1
 147         else
 148                 instance="ftrace"
 149                 instancedir=$TRACEFS
 150         fi
 151
 152         set_array_of ${instance}.options ${instancedir}/trace_options
 153         set_value_of ${instance}.trace_clock ${instancedir}/trace_clock
 154         set_value_of ${instance}.cpumask ${instancedir}/tracing_cpumask
 155         set_value_of ${instance}.tracing_on ${instancedir}/tracing_on
 156         set_value_of ${instance}.tracer ${instancedir}/current_tracer
 157         set_array_of ${instance}.ftrace.filters \
 158                 ${instancedir}/set_ftrace_filter
 159         set_array_of ${instance}.ftrace.notrace \
 160                 ${instancedir}/set_ftrace_notrace
 161
 162         if xbc_has_key ${instance}.alloc_snapshot; then
 163                 run_cmd "echo 1 > ${instancedir}/snapshot"
 164         fi
 165
 166         if xbc_has_key ${instance}.buffer_size; then
 167                 size=`xbc_get_val ${instance}.buffer_size 1`
 168                 size=`eval size2kb $size`
 169                 run_cmd "echo $size >> ${instancedir}/buffer_size_kb"
 170         fi
 171
 172         setup_events ${instance} $1
 173         set_array_of ${instance}.events ${instancedir}/set_event
 174 }
 175
 176 # ftrace global configs (kernel.*)
 177 if xbc_has_key "kernel.dump_on_oops"; then
 178         dump_mode=`xbc_get_val "kernel.dump_on_oops" 1`
 179         [ "$dump_mode" ] && dump_mode=`eval echo $dump_mode` || dump_mode=1
 180         run_cmd "echo \"$dump_mode\" > /proc/sys/kernel/ftrace_dump_on_oops"
 181 fi
 182
 183 set_value_of kernel.fgraph_max_depth $TRACEFS/max_graph_depth
 184 set_array_of kernel.fgraph_filters $TRACEFS/set_graph_function
 185 set_array_of kernel.fgraph_notraces $TRACEFS/set_graph_notrace
 186
 187 # Per-instance/per-event configs
 188 if ! xbc_has_branch "ftrace" ; then
 189         exit 0
 190 fi
 191
 192 setup_instance # root instance
 193
 194 if xbc_has_branch "ftrace.instance"; then
 195         for i in `xbc_subkeys "ftrace.instance" 1`; do
 196                 run_cmd "mkdir -p $TRACEFS/instances/$i"
 197                 setup_instance $i
 198         done
 199 fi
 200