757 lines
19 KiB
Perl
Executable File
757 lines
19 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# (c) 2001, Dave Jones. <davej@codemonkey.org.uk> (the file handling bit)
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# (c) 2005, Joel Scohpp <jschopp@austin.ibm.com> (the ugly bit)
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# (c) 2007, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite, etc)
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# Licensed under the terms of the GNU GPL License version 2
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use strict;
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my $P = $0;
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my $V = '0.03';
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use Getopt::Long qw(:config no_auto_abbrev);
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my $quiet = 0;
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my $tree = 1;
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my $chk_signoff = 1;
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my $chk_patch = 1;
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GetOptions(
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'q|quiet' => \$quiet,
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'tree!' => \$tree,
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'signoff!' => \$chk_signoff,
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'patch!' => \$chk_patch,
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) or exit;
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my $exit = 0;
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if ($#ARGV < 0) {
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print "usage: patchstylecheckemail.pl [options] patchfile\n";
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print "version: $V\n";
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print "options: -q => quiet\n";
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print " --no-tree => run without a kernel tree\n";
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exit(1);
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}
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if ($tree && !top_of_kernel_tree()) {
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print "Must be run from the top-level dir. of a kernel tree\n";
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exit(2);
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}
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my @dep_includes = ();
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my @dep_functions = ();
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my $removal = 'Documentation/feature-removal-schedule.txt';
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if ($tree && -f $removal) {
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open(REMOVE, "<$removal") || die "$P: $removal: open failed - $!\n";
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while (<REMOVE>) {
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if (/^Files:\s+(.*\S)/) {
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for my $file (split(/[, ]+/, $1)) {
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if ($file =~ m@include/(.*)@) {
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push(@dep_includes, $1);
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}
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}
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} elsif (/^Funcs:\s+(.*\S)/) {
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for my $func (split(/[, ]+/, $1)) {
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push(@dep_functions, $func);
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}
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}
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}
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}
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my @lines = ();
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while (<>) {
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chomp;
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push(@lines, $_);
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if (eof(ARGV)) {
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if (!process($ARGV, @lines)) {
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$exit = 1;
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}
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@lines = ();
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}
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}
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exit($exit);
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sub top_of_kernel_tree {
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if ((-f "COPYING") && (-f "CREDITS") && (-f "Kbuild") &&
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(-f "MAINTAINERS") && (-f "Makefile") && (-f "README") &&
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(-d "Documentation") && (-d "arch") && (-d "include") &&
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(-d "drivers") && (-d "fs") && (-d "init") && (-d "ipc") &&
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(-d "kernel") && (-d "lib") && (-d "scripts")) {
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return 1;
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}
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return 0;
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}
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sub expand_tabs {
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my ($str) = @_;
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my $res = '';
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my $n = 0;
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for my $c (split(//, $str)) {
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if ($c eq "\t") {
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$res .= ' ';
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$n++;
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for (; ($n % 8) != 0; $n++) {
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$res .= ' ';
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}
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next;
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}
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$res .= $c;
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$n++;
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}
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return $res;
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}
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sub line_stats {
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my ($line) = @_;
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# Drop the diff line leader and expand tabs
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$line =~ s/^.//;
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$line = expand_tabs($line);
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# Pick the indent from the front of the line.
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my ($white) = ($line =~ /^(\s*)/);
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return (length($line), length($white));
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}
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sub ctx_block_get {
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my ($linenr, $remain, $outer) = @_;
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my $line;
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my $start = $linenr - 1;
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my $end = $linenr - 1 + $remain;
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my $blk = '';
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my @o;
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my @c;
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my @res = ();
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for ($line = $start; $line < $end; $line++) {
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$blk .= $lines[$line];
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@o = ($blk =~ /\{/g);
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@c = ($blk =~ /\}/g);
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if (!$outer || (scalar(@o) - scalar(@c)) == 1) {
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push(@res, $lines[$line]);
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}
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last if (scalar(@o) == scalar(@c));
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}
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return @res;
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}
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sub ctx_block_outer {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 1);
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}
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sub ctx_block {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 0);
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}
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sub ctx_locate_comment {
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my ($first_line, $end_line) = @_;
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# Catch a comment on the end of the line itself.
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my ($current_comment) = ($lines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
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return $current_comment if (defined $current_comment);
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# Look through the context and try and figure out if there is a
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# comment.
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my $in_comment = 0;
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$current_comment = '';
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for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
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my $line = $lines[$linenr - 1];
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##warn " $line\n";
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if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@/\*@) {
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$in_comment = 1;
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}
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if (!$in_comment && $current_comment ne '') {
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$current_comment = '';
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}
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$current_comment .= $line . "\n" if ($in_comment);
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if ($line =~ m@\*/@) {
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$in_comment = 0;
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}
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}
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chomp($current_comment);
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return($current_comment);
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}
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sub ctx_has_comment {
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my ($first_line, $end_line) = @_;
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my $cmt = ctx_locate_comment($first_line, $end_line);
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##print "LINE: $lines[$end_line - 1 ]\n";
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##print "CMMT: $cmt\n";
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return ($cmt ne '');
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}
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sub cat_vet {
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my ($vet) = @_;
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$vet =~ s/\t/^I/;
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$vet =~ s/$/\$/;
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return $vet;
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}
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sub has_non_quoted {
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return ($_[0] =~ m{$_[1]} and $_[0] !~ m{\".*$_[1].*\"});
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}
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sub process {
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my $filename = shift;
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my @lines = @_;
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my $linenr=0;
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my $prevline="";
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my $stashline="";
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my $length;
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my $indent;
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my $previndent=0;
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my $stashindent=0;
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my $clean = 1;
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my $signoff = 0;
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my $is_patch = 0;
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# Trace the real file/line as we go.
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my $realfile = '';
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my $realline = 0;
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my $realcnt = 0;
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my $here = '';
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my $in_comment = 0;
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my $first_line = 0;
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foreach my $line (@lines) {
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$linenr++;
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#extract the filename as it passes
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if ($line=~/^\+\+\+\s+(\S+)/) {
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$realfile=$1;
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$in_comment = 0;
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next;
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}
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#extract the line range in the file after the patch is applied
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if ($line=~/^\@\@ -\d+,\d+ \+(\d+)(,(\d+))? \@\@/) {
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$is_patch = 1;
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$first_line = $linenr + 1;
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$in_comment = 0;
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$realline=$1-1;
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if (defined $2) {
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$realcnt=$3+1;
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} else {
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$realcnt=1+1;
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}
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next;
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}
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# track the line number as we move through the hunk, note that
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# new versions of GNU diff omit the leading space on completely
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# blank context lines so we need to count that too.
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if ($line =~ /^( |\+|$)/) {
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$realline++;
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$realcnt-- if ($realcnt != 0);
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# track any sort of multi-line comment. Obviously if
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# the added text or context do not include the whole
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# comment we will not see it. Such is life.
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#
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# Guestimate if this is a continuing comment. If this
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# is the start of a diff block and this line starts
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# ' *' then it is very likely a comment.
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if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@/\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@\*/@) {
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$in_comment = 0;
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}
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# Measure the line length and indent.
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($length, $indent) = line_stats($line);
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# Track the previous line.
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($prevline, $stashline) = ($stashline, $line);
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($previndent, $stashindent) = ($stashindent, $indent);
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}
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#make up the handle for any error we report on this line
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$here = "PATCH: $ARGV:$linenr:";
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$here .= "\nFILE: $realfile:$realline:" if ($realcnt != 0);
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my $herecurr = "$here\n$line\n\n";
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my $hereprev = "$here\n$prevline\n$line\n\n";
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#check the patch for a signoff:
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if ($line =~ /^\s*Signed-off-by:\s/) {
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$signoff++;
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} elsif ($line =~ /^\s*signed-off-by:/i) {
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# This is a signoff, if ugly, so do not double report.
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$signoff++;
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if (!($line =~ /^\s*Signed-off-by:/)) {
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print "use Signed-off-by:\n";
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print "$herecurr";
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$clean = 0;
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}
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if ($line =~ /^\s*signed-off-by:\S/i) {
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print "need space after Signed-off-by:\n";
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print "$herecurr";
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$clean = 0;
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}
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}
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#ignore lines not being added
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if ($line=~/^[^\+]/) {next;}
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# check we are in a valid source file *.[hcsS] if not then ignore this hunk
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next if ($realfile !~ /\.[hcsS]$/);
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#trailing whitespace
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if ($line=~/\S\s+$/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n\n";
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print "trailing whitespace\n";
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print "$herevet";
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$clean = 0;
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}
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#80 column limit
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if (!($prevline=~/\/\*\*/) && $length > 80) {
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print "line over 80 characters\n";
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print "$herecurr";
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$clean = 0;
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}
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# check we are in a valid source file *.[hc] if not then ignore this hunk
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next if ($realfile !~ /\.[hc]$/);
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# at the beginning of a line any tabs must come first and anything
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# more than 8 must use tabs.
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if ($line=~/^\+\s* \t\s*\S/ or $line=~/^\+\s* \s*/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n\n";
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print "use tabs not spaces\n";
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print "$herevet";
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$clean = 0;
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}
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#
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# The rest of our checks refer specifically to C style
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# only apply those _outside_ comments.
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#
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next if ($in_comment);
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# no C99 // comments
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if (has_non_quoted($line, '//')) {
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print "do not use C99 // comments\n";
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print "$herecurr";
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$clean = 0;
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}
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# Remove comments from the line before processing.
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$line =~ s@/\*.*\*/@@g;
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$line =~ s@/\*.*@@;
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$line =~ s@.*\*/@@;
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$line =~ s@//.*@@;
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#EXPORT_SYMBOL should immediately follow its function closing }.
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if (($line =~ /EXPORT_SYMBOL.*\(.*\)/) ||
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($line =~ /EXPORT_UNUSED_SYMBOL.*\(.*\)/)) {
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if (($prevline !~ /^}/) &&
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($prevline !~ /^\+}/) &&
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($prevline !~ /^ }/)) {
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print "EXPORT_SYMBOL(func); should immediately follow its function\n";
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print "$herecurr";
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$clean = 0;
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}
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}
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# check for static initialisers.
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if ($line=~/\s*static\s.*=\s+(0|NULL);/) {
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print "do not initialise statics to 0 or NULL\n";
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print "$herecurr";
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$clean = 0;
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}
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# check for new typedefs.
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if ($line=~/\s*typedef\s/) {
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print "do not add new typedefs\n";
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print "$herecurr";
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$clean = 0;
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}
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# * goes on variable not on type
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if ($line=~/[A-Za-z\d_]+\* [A-Za-z\d_]+/) {
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print "\"foo* bar\" should be \"foo *bar\"\n";
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print "$herecurr";
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$clean = 0;
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}
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# # no BUG() or BUG_ON()
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# if ($line =~ /\b(BUG|BUG_ON)\b/) {
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# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
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# print "$herecurr";
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# $clean = 0;
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# }
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# printk should use KERN_* levels
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if ($line =~ /\bprintk\((?!KERN_)/) {
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print "printk() should include KERN_ facility level\n";
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print "$herecurr";
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$clean = 0;
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}
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#function brace can't be on same line, except for #defines of do while, or if closed on same line
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if (($line=~/[A-Za-z\d_]+\**\s+\**[A-Za-z\d_]+\(.*\).* {/) and
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!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
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print "braces following function declarations go on the next line\n";
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print "$herecurr";
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$clean = 0;
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}
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# Note we expand the line with the leading + as the real
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# line will be displayed with the leading + and the tabs
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# will therefore also expand that way.
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my $opline = $line;
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$opline = expand_tabs($opline);
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$opline =~ s/^.//;
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if (!($line=~/\#\s*include/)) {
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# Check operator spacing.
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my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
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my $off = 1;
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for (my $n = 0; $n < $#elements; $n += 2) {
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$off += length($elements[$n]);
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my $a = '';
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$a = 'V' if ($elements[$n] ne '');
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$a = 'W' if ($elements[$n] =~ /\s$/);
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$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
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$a = 'O' if ($elements[$n] eq '');
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$a = 'E' if ($elements[$n] eq '' && $n == 0);
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my $op = $elements[$n + 1];
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my $c = '';
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if (defined $elements[$n + 2]) {
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$c = 'V' if ($elements[$n + 2] ne '');
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$c = 'W' if ($elements[$n + 2] =~ /^\s/);
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$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
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$c = 'O' if ($elements[$n + 2] eq '');
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} else {
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$c = 'E';
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}
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my $ctx = "${a}x${c}";
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my $at = "(ctx:$ctx)";
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my $ptr = (" " x $off) . "^";
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my $hereptr = "$here\n$line\n$ptr\n\n";
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##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
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# Skip things apparently in quotes.
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next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
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# We need ; as an operator. // is a comment.
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if ($op eq ';' or $op eq '//') {
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# -> should have no spaces
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} elsif ($op eq '->') {
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if ($ctx =~ /Wx.|.xW/) {
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print "no spaces around that '$op' $at\n";
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print "$hereptr";
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$clean = 0;
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}
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# , must have a space on the right.
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} elsif ($op eq ',') {
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if ($ctx !~ /.xW|.xE/) {
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print "need space after that '$op' $at\n";
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print "$hereptr";
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$clean = 0;
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}
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# unary ! and unary ~ are allowed no space on the right
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} elsif ($op eq '!' or $op eq '~') {
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if ($ctx !~ /[WOEB]x./) {
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print "need space before that '$op' $at\n";
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print "$hereptr";
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$clean = 0;
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}
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if ($ctx =~ /.xW/) {
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print "no space after that '$op' $at\n";
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print "$hereptr";
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$clean = 0;
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}
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# unary ++ and unary -- are allowed no space on one side.
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} elsif ($op eq '++' or $op eq '--') {
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if ($ctx !~ /[WOB]x[^W]|[^W]x[WOB]/) {
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print "need space one side of that '$op' $at\n";
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print "$hereptr";
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$clean = 0;
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}
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# & is both unary and binary
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# unary:
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# a &b
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# binary (consistent spacing):
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# a&b OK
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# a & b OK
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#
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# boiling down to: if there is a space on the right then there
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# should be one on the left.
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|
#
|
|
# - is the same
|
|
#
|
|
# * is the same only adding:
|
|
# type:
|
|
# (foo *)
|
|
# (foo **)
|
|
#
|
|
} elsif ($op eq '&' or $op eq '-') {
|
|
if ($ctx !~ /VxV|[EWB]x[WE]|[EWB]x[VO]/) {
|
|
print "need space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
} elsif ($op eq '*') {
|
|
if ($ctx !~ /VxV|[EWB]x[WE]|[EWB]x[VO]|[EWO]x[OBV]/) {
|
|
print "need space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# << and >> may either have or not have spaces both sides
|
|
} elsif ($op eq '<<' or $op eq '>>' or $op eq '+' or $op eq '/' or
|
|
$op eq '^' or $op eq '|')
|
|
{
|
|
if ($ctx !~ /VxV|WxW|VxE|WxE/) {
|
|
print "need consistent spacing around '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# All the others need spaces both sides.
|
|
} elsif ($ctx !~ /[EW]x[WE]/) {
|
|
print "need spaces around that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
$off += length($elements[$n + 1]);
|
|
}
|
|
}
|
|
|
|
#need space before brace following if, while, etc
|
|
if ($line=~/\(.*\){/) {
|
|
print "need a space before the brace\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
#goto labels aren't indented, allow a single space however
|
|
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
|
|
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
|
|
print "labels should not be indented\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Need a space before open parenthesis after if, while etc
|
|
if ($line=~/\b(if|while|for|switch)\(/) {
|
|
print "need a space before the open parenthesis\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check for illegal assignment in if conditional.
|
|
if ($line=~/\b(if|while)\s*\(.*[^<>!=]=[^=].*\)/) {
|
|
print "do not use assignment in condition\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check for }<nl>else {, these must be at the same
|
|
# indent level to be relevant to each other.
|
|
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
|
|
$previndent == $indent) {
|
|
print "else should follow close brace\n";
|
|
print "$hereprev";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check for switch () and associated case and default
|
|
# statements should be at the same indent.
|
|
if ($line=~/\bswitch\s*\(.*\)/) {
|
|
my $err = '';
|
|
my $sep = '';
|
|
my @ctx = ctx_block_outer($linenr, $realcnt);
|
|
shift(@ctx);
|
|
for my $ctx (@ctx) {
|
|
my ($clen, $cindent) = line_stats($ctx);
|
|
if ($ctx =~ /\s*(case\s+|default:)/ &&
|
|
$indent != $cindent) {
|
|
$err .= "$sep$ctx\n";
|
|
$sep = '';
|
|
} else {
|
|
$sep = "[...]\n";
|
|
}
|
|
}
|
|
if ($err ne '') {
|
|
print "switch and case should be at the same indent\n";
|
|
print "$here\n$line\n$err\n";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
|
|
# if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
|
|
# print "No studly caps, use _\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
#no spaces allowed after \ in define
|
|
if ($line=~/\#define.*\\\s$/) {
|
|
print("Whitepspace after \\ makes next lines useless\n");
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
#warn if <asm/foo.h> is #included and <linux/foo.h> is available.
|
|
if ($tree && $line =~ qr|\s*\#\s*include\s*\<asm\/(.*)\.h\>|) {
|
|
my $checkfile = "include/linux/$1.h";
|
|
if (-f $checkfile) {
|
|
print "Use #include <linux/$1.h> instead of <asm/$1.h>\n";
|
|
print $herecurr;
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
#if/while/etc brace do not go on next line, unless #defining a do while loop, or if that brace on the next line is for something else
|
|
if ($prevline=~/\b(if|while|for|switch)\s*\(/) {
|
|
my @opened = $prevline=~/\(/g;
|
|
my @closed = $prevline=~/\)/g;
|
|
my $nr_line = $linenr;
|
|
my $remaining = $realcnt;
|
|
my $next_line = $line;
|
|
my $extra_lines = 0;
|
|
my $display_segment = $prevline;
|
|
|
|
while ($remaining > 1 && scalar @opened > scalar @closed) {
|
|
$prevline .= $next_line;
|
|
$display_segment .= "\n" . $next_line;
|
|
$next_line = $lines[$nr_line];
|
|
$nr_line++;
|
|
$remaining--;
|
|
|
|
@opened = $prevline=~/\(/g;
|
|
@closed = $prevline=~/\)/g;
|
|
}
|
|
|
|
if (($prevline=~/\b(if|while|for|switch)\s*\(.*\)\s*$/) and ($next_line=~/{/) and
|
|
!($next_line=~/\b(if|while|for)/) and !($next_line=~/\#define.*do.*while/)) {
|
|
print "That { should be on the previous line\n";
|
|
print "$here\n$display_segment\n$next_line\n\n";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
#multiline macros should be enclosed in a do while loop
|
|
if (($prevline=~/\#define.*\\/) and !($prevline=~/do\s+{/) and
|
|
!($prevline=~/\(\{/) and ($line=~/;\s*\\/) and
|
|
!($line=~/do.*{/) and !($line=~/\(\{/)) {
|
|
print "Macros with multiple statements should be enclosed in a do - while loop\n";
|
|
print "$hereprev";
|
|
$clean = 0;
|
|
}
|
|
|
|
# don't include deprecated include files
|
|
for my $inc (@dep_includes) {
|
|
if ($line =~ m@\#\s*include\s*\<$inc>@) {
|
|
print "Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# don't use deprecated functions
|
|
for my $func (@dep_functions) {
|
|
if (has_non_quoted($line, '\b' . $func . '\b')) {
|
|
print "Don't use $func(): see Documentation/feature-removal-schedule.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# no volatiles please
|
|
if (has_non_quoted($line, '\bvolatile\b')) {
|
|
print "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# warn about #ifdefs in C files
|
|
if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
|
|
print "#ifdef in C files should be avoided\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# check for spinlock_t definitions without a comment.
|
|
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
|
|
my $which = $1;
|
|
if (!ctx_has_comment($first_line, $linenr)) {
|
|
print "$1 definition without comment\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
# check for memory barriers without a comment.
|
|
if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
|
|
if (!ctx_has_comment($first_line, $linenr)) {
|
|
print "memory barrier without comment\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
# check of hardware specific defines
|
|
if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@) {
|
|
print "architecture specific defines should be avoided\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
if ($chk_patch && !$is_patch) {
|
|
$clean = 0;
|
|
print "Does not appear to be a unified-diff format patch\n";
|
|
}
|
|
if ($is_patch && $chk_signoff && $signoff == 0) {
|
|
$clean = 0;
|
|
print "Missing Signed-off-by: line(s)\n";
|
|
}
|
|
|
|
if ($clean == 1 && $quiet == 0) {
|
|
print "Your patch has no obvious style problems and is ready for submission.\n"
|
|
}
|
|
if ($clean == 0 && $quiet == 0) {
|
|
print "Your patch has style problems, please review. If any of these errors\n";
|
|
print "are false positives report them to the maintainer, see\n";
|
|
print "CHECKPATCH in MAINTAINERS.\n";
|
|
}
|
|
return $clean;
|
|
}
|