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1075 lines
29 KiB
1075 lines
29 KiB
#!/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 Schopp <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 = $0;
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$P =~ s@.*/@@g;
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my $V = '0.08';
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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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my $tst_type = 0;
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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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'test-type!' => \$tst_type,
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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: $P [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 (/^Check:\s+(.*\S)/) {
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for my $entry (split(/[, ]+/, $1)) {
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if ($entry =~ m@include/(.*)@) {
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push(@dep_includes, $1);
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} elsif ($entry !~ m@/@) {
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push(@dep_functions, $entry);
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}
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}
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}
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}
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}
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my @rawlines = ();
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while (<>) {
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chomp;
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push(@rawlines, $_);
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if (eof(ARGV)) {
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if (!process($ARGV, @rawlines)) {
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$exit = 1;
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}
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@rawlines = ();
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}
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}
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exit($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($white));
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}
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sub sanitise_line {
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my ($line) = @_;
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my $res = '';
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my $l = '';
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my $quote = '';
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foreach my $c (split(//, $line)) {
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if ($l ne "\\" && ($c eq "'" || $c eq '"')) {
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if ($quote eq '') {
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$quote = $c;
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$res .= $c;
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$l = $c;
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next;
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} elsif ($quote eq $c) {
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$quote = '';
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}
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}
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if ($quote && $c ne "\t") {
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$res .= "X";
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} else {
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$res .= $c;
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}
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$l = $c;
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}
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return $res;
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}
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sub ctx_block_get {
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my ($linenr, $remain, $outer, $open, $close, $off) = @_;
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my $line;
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my $start = $linenr - 1;
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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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my $level = 0;
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for ($line = $start; $remain > 0; $line++) {
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next if ($rawlines[$line] =~ /^-/);
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$remain--;
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$blk .= $rawlines[$line];
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foreach my $c (split(//, $rawlines[$line])) {
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##print "C<$c>L<$level><$open$close>O<$off>\n";
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if ($off > 0) {
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$off--;
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next;
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}
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if ($c eq $close && $level > 0) {
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$level--;
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last if ($level == 0);
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} elsif ($c eq $open) {
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$level++;
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}
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}
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if (!$outer || $level <= 1) {
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push(@res, $rawlines[$line]);
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}
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last if ($level == 0);
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}
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return ($level, @res);
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}
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sub ctx_block_outer {
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my ($linenr, $remain) = @_;
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my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
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return @r;
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}
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sub ctx_block {
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my ($linenr, $remain) = @_;
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my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
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return @r;
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}
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sub ctx_statement {
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my ($linenr, $remain, $off) = @_;
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my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
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return @r;
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}
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sub ctx_block_level {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
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}
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sub ctx_locate_comment {
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my ($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) = ($rawlines[$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 = $rawlines[$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: $rawlines[$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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my @report = ();
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sub report {
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push(@report, $_[0]);
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}
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sub report_dump {
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@report;
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}
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sub ERROR {
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report("ERROR: $_[0]\n");
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our $clean = 0;
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}
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sub WARN {
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report("WARNING: $_[0]\n");
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our $clean = 0;
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}
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sub CHK {
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report("CHECK: $_[0]\n");
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our $clean = 0;
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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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our $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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my $Ident = qr{[A-Za-z\d_]+};
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my $Storage = qr{extern|static};
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my $Sparse = qr{__user|__kernel|__force|__iomem};
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my $NonptrType = qr{
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\b
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(?:const\s+)?
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(?:unsigned\s+)?
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(?:
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void|
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char|
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short|
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int|
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long|
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unsigned|
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float|
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double|
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long\s+int|
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long\s+long|
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long\s+long\s+int|
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u8|u16|u32|u64|
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s8|s16|s32|s64|
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struct\s+$Ident|
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union\s+$Ident|
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enum\s+$Ident|
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${Ident}_t
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)
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(?:\s+$Sparse)*
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\b
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}x;
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my $Type = qr{
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\b$NonptrType\b
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(?:\s*\*+\s*const|\s*\*+)?
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}x;
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my $Declare = qr{(?:$Storage\s+)?$Type};
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my $Attribute = qr{const|__read_mostly|__init|__initdata|__meminit};
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my $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
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my $Lval = qr{$Ident(?:$Member)*};
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# Pre-scan the patch looking for any __setup documentation.
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my @setup_docs = ();
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my $setup_docs = 0;
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foreach my $line (@lines) {
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if ($line=~/^\+\+\+\s+(\S+)/) {
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$setup_docs = 0;
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if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
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$setup_docs = 1;
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}
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next;
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}
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if ($setup_docs && $line =~ /^\+/) {
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push(@setup_docs, $line);
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}
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}
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foreach my $line (@lines) {
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$linenr++;
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my $rawline = $line;
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#extract the filename as it passes
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if ($line=~/^\+\+\+\s+(\S+)/) {
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$realfile=$1;
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$realfile =~ s@^[^/]*/@@;
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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, $indent);
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} elsif ($realcnt == 1) {
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$realcnt--;
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}
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#make up the handle for any error we report on this line
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$here = "#$linenr: ";
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$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
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my $hereline = "$here\n$line\n";
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my $herecurr = "$here\n$line\n";
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my $hereprev = "$here\n$prevline\n$line\n";
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#check the patch for a signoff:
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if ($line =~ /^\s*signed-off-by:/i) {
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# This is a signoff, if ugly, so do not double report.
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$signoff++;
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if (!($line =~ /^\s*Signed-off-by:/)) {
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WARN("Signed-off-by: is the preferred form\n" .
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$herecurr);
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}
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if ($line =~ /^\s*signed-off-by:\S/i) {
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WARN("need space after Signed-off-by:\n" .
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$herecurr);
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}
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}
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# Check for wrappage within a valid hunk of the file
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if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
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ERROR("patch seems to be corrupt (line wrapped?)\n" .
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$herecurr);
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}
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# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
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if (($realfile =~ /^$/ || $line =~ /^\+/) &&
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!($line =~ m/^(
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[\x09\x0A\x0D\x20-\x7E] # ASCII
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| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
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| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
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| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
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| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
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| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
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| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
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| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
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)*$/x )) {
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ERROR("Invalid UTF-8\n" . $herecurr);
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}
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#ignore lines being removed
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if ($line=~/^-/) {next;}
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# check we are in a valid source file if not then ignore this hunk
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next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
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|
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#trailing whitespace
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if ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n";
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ERROR("trailing whitespace\n" . $herevet);
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}
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#80 column limit
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if ($line =~ /^\+/ && !($prevline=~/\/\*\*/) && $length > 80) {
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WARN("line over 80 characters\n" . $herecurr);
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}
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# check we are in a valid source file *.[hc] if not then ignore this hunk
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next if ($realfile !~ /\.[hc]$/);
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|
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# at the beginning of a line any tabs must come first and anything
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# more than 8 must use tabs.
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if ($line=~/^\+\s* \t\s*\S/ or $line=~/^\+\s* \s*/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n";
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ERROR("use tabs not spaces\n" . $herevet);
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}
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#
|
|
# The rest of our checks refer specifically to C style
|
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# only apply those _outside_ comments.
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#
|
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next if ($in_comment);
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|
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# Remove comments from the line before processing.
|
|
$line =~ s@/\*.*\*/@@g;
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$line =~ s@/\*.*@@;
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$line =~ s@.*\*/@@;
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|
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# Standardise the strings and chars within the input to simplify matching.
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|
$line = sanitise_line($line);
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|
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#
|
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# Checks which may be anchored in the context.
|
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#
|
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|
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# Check for switch () and associated case and default
|
|
# statements should be at the same indent.
|
|
if ($line=~/\bswitch\s*\(.*\)/) {
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my $err = '';
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my $sep = '';
|
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my @ctx = ctx_block_outer($linenr, $realcnt);
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shift(@ctx);
|
|
for my $ctx (@ctx) {
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|
my ($clen, $cindent) = line_stats($ctx);
|
|
if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
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$indent != $cindent) {
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$err .= "$sep$ctx\n";
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|
$sep = '';
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|
} else {
|
|
$sep = "[...]\n";
|
|
}
|
|
}
|
|
if ($err ne '') {
|
|
ERROR("switch and case should be at the same indent\n$hereline\n$err\n");
|
|
}
|
|
}
|
|
|
|
# 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 ($line =~ /\b(?:(if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.#/) {
|
|
my @ctx = ctx_statement($linenr, $realcnt, 0);
|
|
my $ctx_ln = $linenr + $#ctx + 1;
|
|
my $ctx_cnt = $realcnt - $#ctx - 1;
|
|
my $ctx = join("\n", @ctx);
|
|
|
|
while ($ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^-/) {
|
|
$ctx_ln++;
|
|
$ctx_cnt--;
|
|
}
|
|
##warn "line<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>";
|
|
|
|
if ($ctx !~ /{\s*/ && $ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
|
|
ERROR("That open brace { should be on the previous line\n" .
|
|
"$here\n$ctx\n$lines[$ctx_ln - 1]");
|
|
}
|
|
}
|
|
|
|
#ignore lines not being added
|
|
if ($line=~/^[^\+]/) {next;}
|
|
|
|
# TEST: allow direct testing of the type matcher.
|
|
if ($tst_type && $line =~ /^.$Declare$/) {
|
|
ERROR("TEST: is type $Declare\n" . $herecurr);
|
|
next;
|
|
}
|
|
|
|
# check for initialisation to aggregates open brace on the next line
|
|
if ($prevline =~ /$Declare\s*$Ident\s*=\s*$/ &&
|
|
$line =~ /^.\s*{/) {
|
|
ERROR("That open brace { should be on the previous line\n" . $hereprev);
|
|
}
|
|
|
|
#
|
|
# Checks which are anchored on the added line.
|
|
#
|
|
|
|
# check for malformed paths in #include statements (uses RAW line)
|
|
if ($rawline =~ m{^.#\s*include\s+[<"](.*)[">]}) {
|
|
my $path = $1;
|
|
if ($path =~ m{//}) {
|
|
ERROR("malformed #include filename\n" .
|
|
$herecurr);
|
|
}
|
|
# Sanitise this special form of string.
|
|
$path = 'X' x length($path);
|
|
$line =~ s{\<.*\>}{<$path>};
|
|
}
|
|
|
|
# no C99 // comments
|
|
if ($line =~ m{//}) {
|
|
ERROR("do not use C99 // comments\n" . $herecurr);
|
|
}
|
|
# Remove C99 comments.
|
|
$line =~ s@//.*@@;
|
|
|
|
#EXPORT_SYMBOL should immediately follow its function closing }.
|
|
if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
|
|
($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
|
|
my $name = $1;
|
|
if (($prevline !~ /^}/) &&
|
|
($prevline !~ /^\+}/) &&
|
|
($prevline !~ /^ }/) &&
|
|
($prevline !~ /\s$name(?:\s+$Attribute)?\s*(?:;|=)/)) {
|
|
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# check for external initialisers.
|
|
if ($line =~ /^.$Type\s*$Ident\s*=\s*(0|NULL);/) {
|
|
ERROR("do not initialise externals to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
# check for static initialisers.
|
|
if ($line =~ /\s*static\s.*=\s*(0|NULL);/) {
|
|
ERROR("do not initialise statics to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for new typedefs, only function parameters and sparse annotations
|
|
# make sense.
|
|
if ($line =~ /\btypedef\s/ &&
|
|
$line !~ /\btypedef\s+$Type\s+\(\s*\*$Ident\s*\)\s*\(/ &&
|
|
$line !~ /\b__bitwise(?:__|)\b/) {
|
|
WARN("do not add new typedefs\n" . $herecurr);
|
|
}
|
|
|
|
# * goes on variable not on type
|
|
if ($line =~ m{\($NonptrType(\*+)(?:\s+const)?\)}) {
|
|
ERROR("\"(foo$1)\" should be \"(foo $1)\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{\($NonptrType\s+(\*+)(?!\s+const)\s+\)}) {
|
|
ERROR("\"(foo $1 )\" should be \"(foo $1)\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{$NonptrType(\*+)(?:\s+$Attribute)?\s+[A-Za-z\d_]+}) {
|
|
ERROR("\"foo$1 bar\" should be \"foo $1bar\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+$Attribute)\s+[A-Za-z\d_]+}) {
|
|
ERROR("\"foo $1 bar\" should be \"foo $1bar\"\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# # no BUG() or BUG_ON()
|
|
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
|
|
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
# printk should use KERN_* levels. Note that follow on printk's on the
|
|
# same line do not need a level, so we use the current block context
|
|
# to try and find and validate the current printk. In summary the current
|
|
# printk includes all preceeding printk's which have no newline on the end.
|
|
# we assume the first bad printk is the one to report.
|
|
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
|
|
my $ok = 0;
|
|
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
|
|
#print "CHECK<$lines[$ln - 1]\n";
|
|
# we have a preceeding printk if it ends
|
|
# with "\n" ignore it, else it is to blame
|
|
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
|
|
if ($rawlines[$ln - 1] !~ m{\\n"}) {
|
|
$ok = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
if ($ok == 0) {
|
|
WARN("printk() should include KERN_ facility level\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# function brace can't be on same line, except for #defines of do while,
|
|
# or if closed on same line
|
|
if (($line=~/$Type\s*[A-Za-z\d_]+\(.*\).* {/) and
|
|
!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
|
|
ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
|
|
}
|
|
|
|
# check for spaces between functions and their parentheses.
|
|
if ($line =~ /($Ident)\s+\(/ &&
|
|
$1 !~ /^(?:if|for|while|switch|return|volatile)$/ &&
|
|
$line !~ /$Type\s+\(/ && $line !~ /^.\#\s*define\b/) {
|
|
ERROR("no space between function name and open parenthesis '('\n" . $herecurr);
|
|
}
|
|
# Check operator spacing.
|
|
# Note we expand the line with the leading + as the real
|
|
# line will be displayed with the leading + and the tabs
|
|
# will therefore also expand that way.
|
|
my $opline = $line;
|
|
$opline = expand_tabs($opline);
|
|
$opline =~ s/^./ /;
|
|
if (!($line=~/\#\s*include/)) {
|
|
my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|=>|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
|
|
my $off = 0;
|
|
for (my $n = 0; $n < $#elements; $n += 2) {
|
|
$off += length($elements[$n]);
|
|
|
|
my $a = '';
|
|
$a = 'V' if ($elements[$n] ne '');
|
|
$a = 'W' if ($elements[$n] =~ /\s$/);
|
|
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
|
|
$a = 'O' if ($elements[$n] eq '');
|
|
$a = 'E' if ($elements[$n] eq '' && $n == 0);
|
|
|
|
my $op = $elements[$n + 1];
|
|
|
|
my $c = '';
|
|
if (defined $elements[$n + 2]) {
|
|
$c = 'V' if ($elements[$n + 2] ne '');
|
|
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
|
|
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
|
|
$c = 'O' if ($elements[$n + 2] eq '');
|
|
} else {
|
|
$c = 'E';
|
|
}
|
|
|
|
# Pick up the preceeding and succeeding characters.
|
|
my $ca = substr($opline, 0, $off);
|
|
my $cc = '';
|
|
if (length($opline) >= ($off + length($elements[$n + 1]))) {
|
|
$cc = substr($opline, $off + length($elements[$n + 1]));
|
|
}
|
|
my $cb = "$ca$;$cc";
|
|
|
|
my $ctx = "${a}x${c}";
|
|
|
|
my $at = "(ctx:$ctx)";
|
|
|
|
my $ptr = (" " x $off) . "^";
|
|
my $hereptr = "$hereline$ptr\n";
|
|
|
|
##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
|
|
|
|
# ; should have either the end of line or a space or \ after it
|
|
if ($op eq ';') {
|
|
if ($ctx !~ /.x[WEB]/ && $cc !~ /^\\/ &&
|
|
$cc !~ /^;/) {
|
|
ERROR("need space after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# // is a comment
|
|
} elsif ($op eq '//') {
|
|
|
|
# -> should have no spaces
|
|
} elsif ($op eq '->') {
|
|
if ($ctx =~ /Wx.|.xW/) {
|
|
ERROR("no spaces around that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# , must have a space on the right.
|
|
} elsif ($op eq ',') {
|
|
if ($ctx !~ /.xW|.xE/ && $cc !~ /^}/) {
|
|
ERROR("need space after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# unary ! and unary ~ are allowed no space on the right
|
|
} elsif ($op eq '!' or $op eq '~') {
|
|
if ($ctx !~ /[WOEB]x./) {
|
|
ERROR("need space before that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /.xW/) {
|
|
ERROR("no space after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# unary ++ and unary -- are allowed no space on one side.
|
|
} elsif ($op eq '++' or $op eq '--') {
|
|
if ($ctx !~ /[WOB]x[^W]/ && $ctx !~ /[^W]x[WOBE]/) {
|
|
ERROR("need space one side of that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /Wx./ && $cc =~ /^;/) {
|
|
ERROR("no space before that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# & is both unary and binary
|
|
# unary:
|
|
# a &b
|
|
# binary (consistent spacing):
|
|
# a&b OK
|
|
# a & b OK
|
|
#
|
|
# boiling down to: if there is a space on the right then there
|
|
# should be one on the left.
|
|
#
|
|
# - is the same
|
|
#
|
|
} elsif ($op eq '&' or $op eq '-') {
|
|
if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
|
|
ERROR("need space before that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# * is the same as & only adding:
|
|
# type:
|
|
# (foo *)
|
|
# (foo **)
|
|
#
|
|
} elsif ($op eq '*') {
|
|
if ($ca !~ /$Type$/ && $cb !~ /(\*$;|$;\*)/ &&
|
|
$ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB|BxB/) {
|
|
ERROR("need space before that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# << and >> may either have or not have spaces both sides
|
|
} elsif ($op eq '<<' or $op eq '>>' or $op eq '+' or $op eq '/' or
|
|
$op eq '^' or $op eq '|')
|
|
{
|
|
if ($ctx !~ /VxV|WxW|VxE|WxE/) {
|
|
ERROR("need consistent spacing around '$op' $at\n" .
|
|
$hereptr);
|
|
}
|
|
|
|
# All the others need spaces both sides.
|
|
} elsif ($ctx !~ /[EW]x[WE]/) {
|
|
ERROR("need spaces around that '$op' $at\n" . $hereptr);
|
|
}
|
|
$off += length($elements[$n + 1]);
|
|
}
|
|
}
|
|
|
|
# check for multiple assignments
|
|
if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
|
|
WARN("multiple assignments should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
# check for multiple declarations, allowing for a function declaration
|
|
# continuation.
|
|
if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
|
|
$line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
|
|
WARN("declaring multiple variables together should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
#need space before brace following if, while, etc
|
|
if ($line =~ /\(.*\){/ || $line =~ /do{/) {
|
|
ERROR("need a space before the open brace '{'\n" . $herecurr);
|
|
}
|
|
|
|
# closing brace should have a space following it when it has anything
|
|
# on the line
|
|
if ($line =~ /}(?!(?:,|;|\)))\S/) {
|
|
ERROR("need a space after that close brace '}'\n" . $herecurr);
|
|
}
|
|
|
|
#goto labels aren't indented, allow a single space however
|
|
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
|
|
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
|
|
WARN("labels should not be indented\n" . $herecurr);
|
|
}
|
|
|
|
# Need a space before open parenthesis after if, while etc
|
|
if ($line=~/\b(if|while|for|switch)\(/) {
|
|
ERROR("need a space before the open parenthesis '('\n" . $herecurr);
|
|
}
|
|
|
|
# Check for illegal assignment in if conditional.
|
|
if ($line=~/\bif\s*\(.*[^<>!=]=[^=].*\)/) {
|
|
#next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
|
|
ERROR("do not use assignment in if condition\n" . $herecurr);
|
|
}
|
|
|
|
# Check for }<nl>else {, these must be at the same
|
|
# indent level to be relevant to each other.
|
|
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
|
|
$previndent == $indent) {
|
|
ERROR("else should follow close brace '}'\n" . $hereprev);
|
|
}
|
|
|
|
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
|
|
# if (($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$/) {
|
|
WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
|
|
}
|
|
|
|
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
|
|
if ($tree && $rawline =~ m{^.\#\s*include\s*\<asm\/(.*)\.h\>}) {
|
|
my $checkfile = "include/linux/$1.h";
|
|
if (-f $checkfile) {
|
|
CHK("Use #include <linux/$1.h> instead of <asm/$1.h>\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# if and else should not have general statements after it
|
|
if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/ &&
|
|
$1 !~ /^\s*(?:\sif|{|\\|$)/) {
|
|
ERROR("trailing statements should be on next line\n" . $herecurr);
|
|
}
|
|
|
|
# multi-statement macros should be enclosed in a do while loop, grab the
|
|
# first statement and ensure its the whole macro if its not enclosed
|
|
# in a known goot container
|
|
if (($prevline=~/\#define.*\\/) and
|
|
!($prevline=~/do\s+{/) and !($prevline=~/\(\{/) and
|
|
!($line=~/do.*{/) and !($line=~/\(\{/) and
|
|
!($line=~/^.\s*$Declare\s/)) {
|
|
# Grab the first statement, if that is the entire macro
|
|
# its ok. This may start either on the #define line
|
|
# or the one below.
|
|
my $ln = $linenr;
|
|
my $cnt = $realcnt;
|
|
my $off = 0;
|
|
|
|
# If the macro starts on the define line start
|
|
# grabbing the statement after the identifier
|
|
$prevline =~ m{^(.#\s*define\s*$Ident(?:\([^\)]*\))?\s*)(.*)\\\s*$};
|
|
##print "1<$1> 2<$2>\n";
|
|
if ($2 ne '') {
|
|
$off = length($1);
|
|
$ln--;
|
|
$cnt++;
|
|
}
|
|
my @ctx = ctx_statement($ln, $cnt, $off);
|
|
my $ctx_ln = $ln + $#ctx + 1;
|
|
my $ctx = join("\n", @ctx);
|
|
|
|
# Pull in any empty extension lines.
|
|
while ($ctx =~ /\\$/ &&
|
|
$lines[$ctx_ln - 1] =~ /^.\s*(?:\\)?$/) {
|
|
$ctx .= $lines[$ctx_ln - 1];
|
|
$ctx_ln++;
|
|
}
|
|
|
|
if ($ctx =~ /\\$/) {
|
|
if ($ctx =~ /;/) {
|
|
ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
|
|
} else {
|
|
ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
# check for redundant bracing round if etc
|
|
if ($line =~ /\b(if|while|for|else)\b/) {
|
|
# Locate the end of the opening statement.
|
|
my @control = ctx_statement($linenr, $realcnt, 0);
|
|
my $nr = $linenr + (scalar(@control) - 1);
|
|
my $cnt = $realcnt - (scalar(@control) - 1);
|
|
|
|
my $off = $realcnt - $cnt;
|
|
#print "$off: line<$line>end<" . $lines[$nr - 1] . ">\n";
|
|
|
|
# If this is is a braced statement group check it
|
|
if ($lines[$nr - 1] =~ /{\s*$/) {
|
|
my ($lvl, @block) = ctx_block_level($nr, $cnt);
|
|
|
|
my $stmt = join(' ', @block);
|
|
$stmt =~ s/^[^{]*{//;
|
|
$stmt =~ s/}[^}]*$//;
|
|
|
|
#print "block<" . join(' ', @block) . "><" . scalar(@block) . ">\n";
|
|
#print "stmt<$stmt>\n\n";
|
|
|
|
# Count the ;'s if there is fewer than two
|
|
# then there can only be one statement,
|
|
# if there is a brace inside we cannot
|
|
# trivially detect if its one statement.
|
|
# Also nested if's often require braces to
|
|
# disambiguate the else binding so shhh there.
|
|
my @semi = ($stmt =~ /;/g);
|
|
##print "semi<" . scalar(@semi) . ">\n";
|
|
if ($lvl == 0 && scalar(@semi) < 2 &&
|
|
$stmt !~ /{/ && $stmt !~ /\bif\b/) {
|
|
my $herectx = "$here\n" . join("\n", @control, @block[1 .. $#block]) . "\n";
|
|
shift(@block);
|
|
ERROR("braces {} are not necessary for single statement blocks\n" . $herectx);
|
|
}
|
|
}
|
|
}
|
|
|
|
# don't include deprecated include files (uses RAW line)
|
|
for my $inc (@dep_includes) {
|
|
if ($rawline =~ m@\#\s*include\s*\<$inc>@) {
|
|
ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# don't use deprecated functions
|
|
for my $func (@dep_functions) {
|
|
if ($line =~ /\b$func\b/) {
|
|
ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# no volatiles please
|
|
if ($line =~ /\bvolatile\b/ && $line !~ /\basm\s+volatile\b/) {
|
|
WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
|
|
}
|
|
|
|
# warn about #if 0
|
|
if ($line =~ /^.#\s*if\s+0\b/) {
|
|
CHK("if this code is redundant consider removing it\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for needless kfree() checks
|
|
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
|
|
my $expr = $1;
|
|
if ($line =~ /\bkfree\(\Q$expr\E\);/) {
|
|
WARN("kfree(NULL) is safe this check is probabally not required\n" . $hereprev);
|
|
}
|
|
}
|
|
|
|
# warn about #ifdefs in C files
|
|
# if ($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)) {
|
|
CHK("$1 definition without comment\n" . $herecurr);
|
|
}
|
|
}
|
|
# check for memory barriers without a comment.
|
|
if ($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)) {
|
|
CHK("memory barrier without comment\n" . $herecurr);
|
|
}
|
|
}
|
|
# check of hardware specific defines
|
|
if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@) {
|
|
CHK("architecture specific defines should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
# check the location of the inline attribute, that it is between
|
|
# storage class and type.
|
|
if ($line =~ /$Type\s+(?:inline|__always_inline)\b/ ||
|
|
$line =~ /\b(?:inline|always_inline)\s+$Storage/) {
|
|
ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
|
|
}
|
|
|
|
# check for new externs in .c files.
|
|
if ($line =~ /^.\s*extern\s/ && ($realfile =~ /\.c$/)) {
|
|
WARN("externs should be avoided in .c files\n" . $herecurr);
|
|
}
|
|
|
|
# checks for new __setup's
|
|
if ($rawline =~ /\b__setup\("([^"]*)"/) {
|
|
my $name = $1;
|
|
|
|
if (!grep(/$name/, @setup_docs)) {
|
|
CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($chk_patch && !$is_patch) {
|
|
ERROR("Does not appear to be a unified-diff format patch\n");
|
|
}
|
|
if ($is_patch && $chk_signoff && $signoff == 0) {
|
|
ERROR("Missing Signed-off-by: line(s)\n");
|
|
}
|
|
|
|
if ($clean == 0 && ($chk_patch || $is_patch)) {
|
|
print report_dump();
|
|
}
|
|
if ($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;
|
|
}
|
|
|