devtools/checkpatches.sh

   1 #! /bin/sh
   2 # SPDX-License-Identifier: BSD-3-Clause
   3 # Copyright 2015 6WIND S.A.
   4
   5 # Load config options:
   6 # - DPDK_CHECKPATCH_PATH
   7 # - DPDK_CHECKPATCH_CODESPELL
   8 # - DPDK_CHECKPATCH_LINE_LENGTH
   9 # - DPDK_CHECKPATCH_OPTIONS
  10 . $(dirname $(readlink -f $0))/load-devel-config
  11
  12 VALIDATE_NEW_API=$(dirname $(readlink -f $0))/check-symbol-change.sh
  13
  14 # Enable codespell by default. This can be overwritten from a config file.
  15 # Codespell can also be enabled by setting DPDK_CHECKPATCH_CODESPELL to a valid path
  16 # to a dictionary.txt file if dictionary.txt is not in the default location.
  17 codespell=${DPDK_CHECKPATCH_CODESPELL:-enable}
  18 length=${DPDK_CHECKPATCH_LINE_LENGTH:-80}
  19
  20 # override default Linux options
  21 options="--no-tree"
  22 if [ "$codespell" = "enable" ] ; then
  23     options="$options --codespell"
  24 elif [ -f "$codespell" ] ; then
  25     options="$options --codespell"
  26     options="$options --codespellfile $codespell"
  27 fi
  28 options="$options --max-line-length=$length"
  29 options="$options --show-types"
  30 options="$options --ignore=LINUX_VERSION_CODE,ENOSYS,\
  31 FILE_PATH_CHANGES,MAINTAINERS_STYLE,SPDX_LICENSE_TAG,\
  32 VOLATILE,PREFER_PACKED,PREFER_ALIGNED,PREFER_PRINTF,\
  33 PREFER_KERNEL_TYPES,PREFER_FALLTHROUGH,BIT_MACRO,CONST_STRUCT,\
  34 SPLIT_STRING,LONG_LINE_STRING,C99_COMMENT_TOLERANCE,\
  35 LINE_SPACING,PARENTHESIS_ALIGNMENT,NETWORKING_BLOCK_COMMENT_STYLE,\
  36 NEW_TYPEDEFS,COMPARISON_TO_NULL"
  37 options="$options $DPDK_CHECKPATCH_OPTIONS"
  38
  39 print_usage () {
  40         cat <<- END_OF_HELP
  41         usage: $(basename $0) [-h] [-q] [-v] [-nX|-r range|patch1 [patch2] ...]
  42
  43         Run Linux kernel checkpatch.pl with DPDK options.
  44         The environment variable DPDK_CHECKPATCH_PATH must be set.
  45
  46         The patches to check can be from stdin, files specified on the command line,
  47         latest git commits limited with -n option, or commits in the git range
  48         specified with -r option (default: "origin/main..").
  49         END_OF_HELP
  50 }
  51
  52 check_forbidden_additions() { # <patch>
  53         res=0
  54
  55         # refrain from new additions of rte_panic() and rte_exit()
  56         # multiple folders and expressions are separated by spaces
  57         awk -v FOLDERS="lib drivers" \
  58                 -v EXPRESSIONS="rte_panic\\\( rte_exit\\\(" \
  59                 -v RET_ON_FAIL=1 \
  60                 -v MESSAGE='Using rte_panic/rte_exit' \
  61                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
  62                 "$1" || res=1
  63
  64         # refrain from using compiler attribute without defining a common macro
  65         awk -v FOLDERS="lib drivers app examples" \
  66                 -v EXPRESSIONS="__attribute__" \
  67                 -v RET_ON_FAIL=1 \
  68                 -v MESSAGE='Using compiler attribute directly' \
  69                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
  70                 "$1" || res=1
  71
  72         # forbid variable declaration inside "for" loop
  73         awk -v FOLDERS='.' \
  74                 -v EXPRESSIONS='for[[:space:]]*\\((char|u?int|unsigned|s?size_t)' \
  75                 -v RET_ON_FAIL=1 \
  76                 -v MESSAGE='Declaring a variable inside for()' \
  77                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
  78                 "$1" || res=1
  79
  80         # refrain from new additions of 16/32/64 bits rte_atomicNN_xxx()
  81         awk -v FOLDERS="lib drivers app examples" \
  82                 -v EXPRESSIONS="rte_atomic[0-9][0-9]_.*\\\(" \
  83                 -v RET_ON_FAIL=1 \
  84                 -v MESSAGE='Using rte_atomicNN_xxx' \
  85                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
  86                 "$1" || res=1
  87
  88         # refrain from new additions of rte_smp_[r/w]mb()
  89         awk -v FOLDERS="lib drivers app examples" \
  90                 -v EXPRESSIONS="rte_smp_(r|w)?mb\\\(" \
  91                 -v RET_ON_FAIL=1 \
  92                 -v MESSAGE='Using rte_smp_[r/w]mb' \
  93                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
  94                 "$1" || res=1
  95
  96         # refrain from using compiler __sync_xxx builtins
  97         awk -v FOLDERS="lib drivers app examples" \
  98                 -v EXPRESSIONS="__sync_.*\\\(" \
  99                 -v RET_ON_FAIL=1 \
 100                 -v MESSAGE='Using __sync_xxx builtins' \
 101                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 102                 "$1" || res=1
 103
 104         # refrain from using compiler __atomic_thread_fence()
 105         # It should be avoided on x86 for SMP case.
 106         awk -v FOLDERS="lib drivers app examples" \
 107                 -v EXPRESSIONS="__atomic_thread_fence\\\(" \
 108                 -v RET_ON_FAIL=1 \
 109                 -v MESSAGE='Using __atomic_thread_fence' \
 110                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 111                 "$1" || res=1
 112
 113         # forbid use of experimental build flag except in examples
 114         awk -v FOLDERS='lib drivers app' \
 115                 -v EXPRESSIONS='-DALLOW_EXPERIMENTAL_API allow_experimental_apis' \
 116                 -v RET_ON_FAIL=1 \
 117                 -v MESSAGE='Using experimental build flag for in-tree compilation' \
 118                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 119                 "$1" || res=1
 120
 121         # SVG must be included with wildcard extension to allow conversion
 122         awk -v FOLDERS='doc' \
 123                 -v EXPRESSIONS='::[[:space:]]*[^[:space:]]*\\.svg' \
 124                 -v RET_ON_FAIL=1 \
 125                 -v MESSAGE='Using explicit .svg extension instead of .*' \
 126                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 127                 "$1" || res=1
 128
 129         # links must prefer https over http
 130         awk -v FOLDERS='doc' \
 131                 -v EXPRESSIONS='http://.*dpdk.org' \
 132                 -v RET_ON_FAIL=1 \
 133                 -v MESSAGE='Using non https link to dpdk.org' \
 134                 -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 135                 "$1" || res=1
 136
 137         return $res
 138 }
 139
 140 check_experimental_tags() { # <patch>
 141         res=0
 142
 143         cat "$1" |awk '
 144         BEGIN {
 145                 current_file = "";
 146                 ret = 0;
 147         }
 148         /^+++ b\// {
 149                 current_file = $2;
 150         }
 151         /^+.*__rte_experimental/ {
 152                 if (current_file ~ ".c$" ) {
 153                         print "Please only put __rte_experimental tags in " \
 154                                 "headers ("current_file")";
 155                         ret = 1;
 156                 }
 157                 if ($1 != "+__rte_experimental" || $2 != "") {
 158                         print "__rte_experimental must appear alone on the line" \
 159                                 " immediately preceding the return type of a function."
 160                         ret = 1;
 161                 }
 162         }
 163         END {
 164                 exit ret;
 165         }' || res=1
 166
 167         return $res
 168 }
 169
 170 check_internal_tags() { # <patch>
 171         res=0
 172
 173         cat "$1" |awk '
 174         BEGIN {
 175                 current_file = "";
 176                 ret = 0;
 177         }
 178         /^+++ b\// {
 179                 current_file = $2;
 180         }
 181         /^+.*__rte_internal/ {
 182                 if (current_file ~ ".c$" ) {
 183                         print "Please only put __rte_internal tags in " \
 184                                 "headers ("current_file")";
 185                         ret = 1;
 186                 }
 187                 if ($1 != "+__rte_internal" || $2 != "") {
 188                         print "__rte_internal must appear alone on the line" \
 189                                 " immediately preceding the return type of" \
 190                                 " a function."
 191                         ret = 1;
 192                 }
 193         }
 194         END {
 195                 exit ret;
 196         }' || res=1
 197
 198         return $res
 199 }
 200
 201 number=0
 202 range='origin/main..'
 203 quiet=false
 204 verbose=false
 205 while getopts hn:qr:v ARG ; do
 206         case $ARG in
 207                 n ) number=$OPTARG ;;
 208                 q ) quiet=true ;;
 209                 r ) range=$OPTARG ;;
 210                 v ) verbose=true ;;
 211                 h ) print_usage ; exit 0 ;;
 212                 ? ) print_usage ; exit 1 ;;
 213         esac
 214 done
 215 shift $(($OPTIND - 1))
 216
 217 if [ ! -f "$DPDK_CHECKPATCH_PATH" ] || [ ! -x "$DPDK_CHECKPATCH_PATH" ] ; then
 218         print_usage >&2
 219         echo
 220         echo 'Cannot execute DPDK_CHECKPATCH_PATH' >&2
 221         exit 1
 222 fi
 223
 224 print_headline() { # <title>
 225         printf '\n### %s\n\n' "$1"
 226         headline_printed=true
 227 }
 228
 229 total=0
 230 status=0
 231
 232 check () { # <patch> <commit> <title>
 233         local ret=0
 234         headline_printed=false
 235
 236         total=$(($total + 1))
 237         ! $verbose || print_headline "$3"
 238         if [ -n "$1" ] ; then
 239                 tmpinput=$1
 240         else
 241                 tmpinput=$(mktemp -t dpdk.checkpatches.XXXXXX)
 242                 trap "rm -f '$tmpinput'" INT
 243
 244                 if [ -n "$2" ] ; then
 245                         git format-patch --find-renames \
 246                         --no-stat --stdout -1 $commit > "$tmpinput"
 247                 else
 248                         cat > "$tmpinput"
 249                 fi
 250         fi
 251
 252         ! $verbose || printf 'Running checkpatch.pl:\n'
 253         report=$($DPDK_CHECKPATCH_PATH $options "$tmpinput" 2>/dev/null)
 254         if [ $? -ne 0 ] ; then
 255                 $headline_printed || print_headline "$3"
 256                 printf '%s\n' "$report" | sed -n '1,/^total:.*lines checked$/p'
 257                 ret=1
 258         fi
 259
 260         ! $verbose || printf '\nChecking API additions/removals:\n'
 261         report=$($VALIDATE_NEW_API "$tmpinput")
 262         if [ $? -ne 0 ] ; then
 263                 $headline_printed || print_headline "$3"
 264                 printf '%s\n' "$report"
 265                 ret=1
 266         fi
 267
 268         ! $verbose || printf '\nChecking forbidden tokens additions:\n'
 269         report=$(check_forbidden_additions "$tmpinput")
 270         if [ $? -ne 0 ] ; then
 271                 $headline_printed || print_headline "$3"
 272                 printf '%s\n' "$report"
 273                 ret=1
 274         fi
 275
 276         ! $verbose || printf '\nChecking __rte_experimental tags:\n'
 277         report=$(check_experimental_tags "$tmpinput")
 278         if [ $? -ne 0 ] ; then
 279                 $headline_printed || print_headline "$3"
 280                 printf '%s\n' "$report"
 281                 ret=1
 282         fi
 283
 284         ! $verbose || printf '\nChecking __rte_internal tags:\n'
 285         report=$(check_internal_tags "$tmpinput")
 286         if [ $? -ne 0 ] ; then
 287                 $headline_printed || print_headline "$3"
 288                 printf '%s\n' "$report"
 289                 ret=1
 290         fi
 291
 292         if [ "$tmpinput" != "$1" ]; then
 293                 rm -f "$tmpinput"
 294                 trap - INT
 295         fi
 296         [ $ret -eq 0 ] && return 0
 297
 298         status=$(($status + 1))
 299 }
 300
 301 if [ -n "$1" ] ; then
 302         for patch in "$@" ; do
 303                 # Subject can be on 2 lines
 304                 subject=$(sed '/^Subject: */!d;s///;N;s,\n[[:space:]]\+, ,;s,\n.*,,;q' "$patch")
 305                 check "$patch" '' "$subject"
 306         done
 307 elif [ ! -t 0 ] ; then # stdin
 308         subject=$(while read header value ; do
 309                 if [ "$header" = 'Subject:' ] ; then
 310                         IFS= read next
 311                         continuation=$(echo "$next" | sed -n 's,^[[:space:]]\+, ,p')
 312                         echo $value$continuation
 313                         break
 314                 fi
 315         done)
 316         check '' '' "$subject"
 317 else
 318         if [ $number -eq 0 ] ; then
 319                 commits=$(git rev-list --reverse $range)
 320         else
 321                 commits=$(git rev-list --reverse --max-count=$number HEAD)
 322         fi
 323         for commit in $commits ; do
 324                 subject=$(git log --format='%s' -1 $commit)
 325                 check '' $commit "$subject"
 326         done
 327 fi
 328 pass=$(($total - $status))
 329 $quiet || printf '\n%d/%d valid patch' $pass $total
 330 $quiet || [ $pass -le 1 ] || printf 'es'
 331 $quiet || printf '\n'
 332 exit $status