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-rwxr-xr-xscripts/checkpatch.pl144
1 files changed, 115 insertions, 29 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e954df2b2077..3d4040322ae1 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -566,6 +566,7 @@ foreach my $entry (@mode_permission_funcs) {
$mode_perms_search .= '|' if ($mode_perms_search ne "");
$mode_perms_search .= $entry->[0];
}
+$mode_perms_search = "(?:${mode_perms_search})";
our $mode_perms_world_writable = qr{
S_IWUGO |
@@ -600,6 +601,37 @@ foreach my $entry (keys %mode_permission_string_types) {
$mode_perms_string_search .= '|' if ($mode_perms_string_search ne "");
$mode_perms_string_search .= $entry;
}
+our $single_mode_perms_string_search = "(?:${mode_perms_string_search})";
+our $multi_mode_perms_string_search = qr{
+ ${single_mode_perms_string_search}
+ (?:\s*\|\s*${single_mode_perms_string_search})*
+}x;
+
+sub perms_to_octal {
+ my ($string) = @_;
+
+ return trim($string) if ($string =~ /^\s*0[0-7]{3,3}\s*$/);
+
+ my $val = "";
+ my $oval = "";
+ my $to = 0;
+ my $curpos = 0;
+ my $lastpos = 0;
+ while ($string =~ /\b(($single_mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
+ $curpos = pos($string);
+ my $match = $2;
+ my $omatch = $1;
+ last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
+ $lastpos = $curpos;
+ $to |= $mode_permission_string_types{$match};
+ $val .= '\s*\|\s*' if ($val ne "");
+ $val .= $match;
+ $oval .= $omatch;
+ }
+ $oval =~ s/^\s*\|\s*//;
+ $oval =~ s/\s*\|\s*$//;
+ return sprintf("%04o", $to);
+}
our $allowed_asm_includes = qr{(?x:
irq|
@@ -2875,6 +2907,7 @@ sub process {
# logging functions like pr_info that end in a string
# lines with a single string
# #defines that are a single string
+# lines with an RFC3986 like URL
#
# There are 3 different line length message types:
# LONG_LINE_COMMENT a comment starts before but extends beyond $max_line_length
@@ -2906,6 +2939,10 @@ sub process {
$line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
$msg_type = "";
+ # URL ($rawline is used in case the URL is in a comment)
+ } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
+ $msg_type = "";
+
# Otherwise set the alternate message types
# a comment starts before $max_line_length
@@ -2983,7 +3020,7 @@ sub process {
# check indentation starts on a tab stop
if ($^V && $^V ge 5.10.0 &&
- $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$))/) {
+ $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
my $indent = length($1);
if ($indent % 8) {
if (WARN("TABSTOP",
@@ -3882,10 +3919,12 @@ sub process {
# function brace can't be on same line, except for #defines of do while,
# or if closed on same line
- if (($line=~/$Type\s*$Ident\(.*\).*\s*{/) and
- !($line=~/\#\s*define.*do\s\{/) and !($line=~/}/)) {
+ if ($^V && $^V ge 5.10.0 &&
+ $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ &&
+ $sline !~ /\#\s*define\b.*do\s*\{/ &&
+ $sline !~ /}/) {
if (ERROR("OPEN_BRACE",
- "open brace '{' following function declarations go on the next line\n" . $herecurr) &&
+ "open brace '{' following function definitions go on the next line\n" . $herecurr) &&
$fix) {
fix_delete_line($fixlinenr, $rawline);
my $fixed_line = $rawline;
@@ -4489,7 +4528,9 @@ sub process {
}
# check for unnecessary parentheses around comparisons in if uses
- if ($^V && $^V ge 5.10.0 && defined($stat) &&
+# when !drivers/staging or command-line uses --strict
+ if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) &&
+ $^V && $^V ge 5.10.0 && defined($stat) &&
$stat =~ /(^.\s*if\s*($balanced_parens))/) {
my $if_stat = $1;
my $test = substr($2, 1, -1);
@@ -5307,7 +5348,7 @@ sub process {
}
# check for line continuations in quoted strings with odd counts of "
- if ($rawline =~ /\\$/ && $rawline =~ tr/"/"/ % 2) {
+ if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) {
WARN("LINE_CONTINUATIONS",
"Avoid line continuations in quoted strings\n" . $herecurr);
}
@@ -6269,8 +6310,69 @@ sub process {
"Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
}
+# check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
+# and whether or not function naming is typical and if
+# DEVICE_ATTR permissions uses are unusual too
+ if ($^V && $^V ge 5.10.0 &&
+ defined $stat &&
+ $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) {
+ my $var = $1;
+ my $perms = $2;
+ my $show = $3;
+ my $store = $4;
+ my $octal_perms = perms_to_octal($perms);
+ if ($show =~ /^${var}_show$/ &&
+ $store =~ /^${var}_store$/ &&
+ $octal_perms eq "0644") {
+ if (WARN("DEVICE_ATTR_RW",
+ "Use DEVICE_ATTR_RW\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
+ }
+ } elsif ($show =~ /^${var}_show$/ &&
+ $store =~ /^NULL$/ &&
+ $octal_perms eq "0444") {
+ if (WARN("DEVICE_ATTR_RO",
+ "Use DEVICE_ATTR_RO\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
+ }
+ } elsif ($show =~ /^NULL$/ &&
+ $store =~ /^${var}_store$/ &&
+ $octal_perms eq "0200") {
+ if (WARN("DEVICE_ATTR_WO",
+ "Use DEVICE_ATTR_WO\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
+ }
+ } elsif ($octal_perms eq "0644" ||
+ $octal_perms eq "0444" ||
+ $octal_perms eq "0200") {
+ my $newshow = "$show";
+ $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
+ my $newstore = $store;
+ $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
+ my $rename = "";
+ if ($show ne $newshow) {
+ $rename .= " '$show' to '$newshow'";
+ }
+ if ($store ne $newstore) {
+ $rename .= " '$store' to '$newstore'";
+ }
+ WARN("DEVICE_ATTR_FUNCTIONS",
+ "Consider renaming function(s)$rename\n" . $herecurr);
+ } else {
+ WARN("DEVICE_ATTR_PERMS",
+ "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
+ }
+ }
+
# Mode permission misuses where it seems decimal should be octal
# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
+# o Ignore module_param*(...) uses with a decimal 0 permission as that has a
+# specific definition of not visible in sysfs.
+# o Ignore proc_create*(...) uses with a decimal 0 permission as that means
+# use the default permissions
if ($^V && $^V ge 5.10.0 &&
defined $stat &&
$line =~ /$mode_perms_search/) {
@@ -6294,8 +6396,9 @@ sub process {
if ($stat =~ /$test/) {
my $val = $1;
$val = $6 if ($skip_args ne "");
- if (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
- ($val =~ /^$Octal$/ && length($val) ne 4)) {
+ if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
+ (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
+ ($val =~ /^$Octal$/ && length($val) ne 4))) {
ERROR("NON_OCTAL_PERMISSIONS",
"Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
}
@@ -6308,30 +6411,13 @@ sub process {
}
# check for uses of S_<PERMS> that could be octal for readability
- if ($line =~ /\b$mode_perms_string_search\b/) {
- my $val = "";
- my $oval = "";
- my $to = 0;
- my $curpos = 0;
- my $lastpos = 0;
- while ($line =~ /\b(($mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
- $curpos = pos($line);
- my $match = $2;
- my $omatch = $1;
- last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
- $lastpos = $curpos;
- $to |= $mode_permission_string_types{$match};
- $val .= '\s*\|\s*' if ($val ne "");
- $val .= $match;
- $oval .= $omatch;
- }
- $oval =~ s/^\s*\|\s*//;
- $oval =~ s/\s*\|\s*$//;
- my $octal = sprintf("%04o", $to);
+ if ($line =~ /\b($multi_mode_perms_string_search)\b/) {
+ my $oval = $1;
+ my $octal = perms_to_octal($oval);
if (WARN("SYMBOLIC_PERMS",
"Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
$fix) {
- $fixed[$fixlinenr] =~ s/$val/$octal/;
+ $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-08 16:08:02 +0100