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1#!/usr/bin/perl -w
2#
3# headers_check.pl execute a number of trivial consistency checks
4#
5# Usage: headers_check.pl dir arch [files...]
6# dir: dir to look for included files
7# arch: architecture
8# files: list of files to check
9#
10# The script reads the supplied files line by line and:
11#
12# 1) for each include statement it checks if the
13# included file actually exists.
14# Only include files located in asm* and linux* are checked.
15# The rest are assumed to be system include files.
16#
17# 2) It is checked that prototypes does not use "extern"
18#
19# 3) Check for leaked CONFIG_ symbols
20
21use strict;
22use File::Basename;
23
24my ($dir, $arch, @files) = @ARGV;
25
26my $ret = 0;
27my $line;
28my $lineno = 0;
29my $filename;
30
31foreach my $file (@files) {
32 $filename = $file;
33
34 open(my $fh, '<', $filename)
35 or die "$filename: $!\n";
36 $lineno = 0;
37 while ($line = <$fh>) {
38 $lineno++;
39 &check_include();
40 &check_asm_types();
41 &check_sizetypes();
42 &check_declarations();
43 # Dropped for now. Too much noise &check_config();
44 }
45 close $fh;
46}
47exit $ret;
48
49sub check_include
50{
51 if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
52 my $inc = $1;
53 my $found;
54 $found = stat($dir . "/" . $inc);
55 if (!$found) {
56 $inc =~ s#asm/#asm-$arch/#;
57 $found = stat($dir . "/" . $inc);
58 }
59 if (!$found) {
60 printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
61 $ret = 1;
62 }
63 }
64}
65
66sub check_declarations
67{
68 if ($line =~m/^(\s*extern|unsigned|char|short|int|long|void)\b/) {
69 printf STDERR "$filename:$lineno: " .
70 "userspace cannot reference function or " .
71 "variable defined in the kernel\n";
72 }
73}
74
75sub check_config
76{
77 if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
78 printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
79 }
80}
81
82my $linux_asm_types;
83sub check_asm_types
84{
85 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
86 return;
87 }
88 if ($lineno == 1) {
89 $linux_asm_types = 0;
90 } elsif ($linux_asm_types >= 1) {
91 return;
92 }
93 if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
94 $linux_asm_types = 1;
95 printf STDERR "$filename:$lineno: " .
96 "include of <linux/types.h> is preferred over <asm/types.h>\n"
97 # Warn until headers are all fixed
98 #$ret = 1;
99 }
100}
101
102my $linux_types;
103my %import_stack = ();
104sub check_include_typesh
105{
106 my $path = $_[0];
107 my $import_path;
108
109 my $fh;
110 my @file_paths = ($path, $dir . "/" . $path, dirname($filename) . "/" . $path);
111 for my $possible ( @file_paths ) {
112 if (not $import_stack{$possible} and open($fh, '<', $possible)) {
113 $import_path = $possible;
114 $import_stack{$import_path} = 1;
115 last;
116 }
117 }
118 if (eof $fh) {
119 return;
120 }
121
122 my $line;
123 while ($line = <$fh>) {
124 if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
125 $linux_types = 1;
126 last;
127 }
128 if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
129 check_include_typesh($included);
130 }
131 }
132 close $fh;
133 delete $import_stack{$import_path};
134}
135
136sub check_sizetypes
137{
138 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
139 return;
140 }
141 if ($lineno == 1) {
142 $linux_types = 0;
143 } elsif ($linux_types >= 1) {
144 return;
145 }
146 if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
147 $linux_types = 1;
148 return;
149 }
150 if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
151 check_include_typesh($included);
152 }
153 if ($line =~ m/__[us](8|16|32|64)\b/) {
154 printf STDERR "$filename:$lineno: " .
155 "found __[us]{8,16,32,64} type " .
156 "without #include <linux/types.h>\n";
157 $linux_types = 2;
158 # Warn until headers are all fixed
159 #$ret = 1;
160 }
161}
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3#
4# headers_check.pl execute a number of trivial consistency checks
5#
6# Usage: headers_check.pl dir arch [files...]
7# dir: dir to look for included files
8# arch: architecture
9# files: list of files to check
10#
11# The script reads the supplied files line by line and:
12#
13# 1) for each include statement it checks if the
14# included file actually exists.
15# Only include files located in asm* and linux* are checked.
16# The rest are assumed to be system include files.
17#
18# 2) It is checked that prototypes does not use "extern"
19#
20# 3) Check for leaked CONFIG_ symbols
21
22use warnings;
23use strict;
24use File::Basename;
25
26my ($dir, $arch, @files) = @ARGV;
27
28my $ret = 0;
29my $line;
30my $lineno = 0;
31my $filename;
32
33foreach my $file (@files) {
34 $filename = $file;
35
36 open(my $fh, '<', $filename)
37 or die "$filename: $!\n";
38 $lineno = 0;
39 while ($line = <$fh>) {
40 $lineno++;
41 &check_include();
42 &check_asm_types();
43 &check_sizetypes();
44 &check_declarations();
45 # Dropped for now. Too much noise &check_config();
46 }
47 close $fh;
48}
49exit $ret;
50
51sub check_include
52{
53 if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
54 my $inc = $1;
55 my $found;
56 $found = stat($dir . "/" . $inc);
57 if (!$found) {
58 $inc =~ s#asm/#asm-$arch/#;
59 $found = stat($dir . "/" . $inc);
60 }
61 if (!$found) {
62 printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
63 $ret = 1;
64 }
65 }
66}
67
68sub check_declarations
69{
70 # soundcard.h is what it is
71 if ($line =~ m/^void seqbuf_dump\(void\);/) {
72 return;
73 }
74 # drm headers are being C++ friendly
75 if ($line =~ m/^extern "C"/) {
76 return;
77 }
78 if ($line =~ m/^(\s*extern|unsigned|char|short|int|long|void)\b/) {
79 printf STDERR "$filename:$lineno: " .
80 "userspace cannot reference function or " .
81 "variable defined in the kernel\n";
82 }
83}
84
85sub check_config
86{
87 if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
88 printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
89 }
90}
91
92my $linux_asm_types;
93sub check_asm_types
94{
95 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
96 return;
97 }
98 if ($lineno == 1) {
99 $linux_asm_types = 0;
100 } elsif ($linux_asm_types >= 1) {
101 return;
102 }
103 if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
104 $linux_asm_types = 1;
105 printf STDERR "$filename:$lineno: " .
106 "include of <linux/types.h> is preferred over <asm/types.h>\n"
107 # Warn until headers are all fixed
108 #$ret = 1;
109 }
110}
111
112my $linux_types;
113my %import_stack = ();
114sub check_include_typesh
115{
116 my $path = $_[0];
117 my $import_path;
118
119 my $fh;
120 my @file_paths = ($path, $dir . "/" . $path, dirname($filename) . "/" . $path);
121 for my $possible ( @file_paths ) {
122 if (not $import_stack{$possible} and open($fh, '<', $possible)) {
123 $import_path = $possible;
124 $import_stack{$import_path} = 1;
125 last;
126 }
127 }
128 if (eof $fh) {
129 return;
130 }
131
132 my $line;
133 while ($line = <$fh>) {
134 if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
135 $linux_types = 1;
136 last;
137 }
138 if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
139 check_include_typesh($included);
140 }
141 }
142 close $fh;
143 delete $import_stack{$import_path};
144}
145
146sub check_sizetypes
147{
148 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
149 return;
150 }
151 if ($lineno == 1) {
152 $linux_types = 0;
153 } elsif ($linux_types >= 1) {
154 return;
155 }
156 if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
157 $linux_types = 1;
158 return;
159 }
160 if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
161 check_include_typesh($included);
162 }
163 if ($line =~ m/__[us](8|16|32|64)\b/) {
164 printf STDERR "$filename:$lineno: " .
165 "found __[us]{8,16,32,64} type " .
166 "without #include <linux/types.h>\n";
167 $linux_types = 2;
168 # Warn until headers are all fixed
169 #$ret = 1;
170 }
171}