nfsd: simplify fh_verify access checks

[safe/jmp/linux-2.6] / scripts / headers_check.pl

diff --git a/scripts/headers_check.pl b/scripts/headers_check.pl
index 488a3b1..db1dd7a 100644 (file)
--- a/scripts/headers_check.pl
+++ b/scripts/headers_check.pl
@@ -2,7 +2,7 @@
 #
 # headers_check.pl execute a number of trivial consistency checks
 #
-# Usage: headers_check.pl dir [files...]
+# Usage: headers_check.pl dir arch [files...]
 # dir:   dir to look for included files
 # arch:  architecture
 # files: list of files to check
@@ -14,7 +14,9 @@
 #    Only include files located in asm* and linux* are checked.
 #    The rest are assumed to be system include files.
 #
-# 2) TODO: check for leaked CONFIG_ symbols
+# 2) It is checked that prototypes does not use "extern"
+#
+# 3) Check for leaked CONFIG_ symbols
 
 use strict;
 
@@ -32,7 +34,11 @@ foreach my $file (@files) {
        $lineno = 0;
        while ($line = <FH>) {
                $lineno++;
-               check_include();
+               &check_include();
+               &check_asm_types();
+               &check_sizetypes();
+               &check_declarations();
+               # Dropped for now. Too much noise &check_config();
        }
        close FH;
 }
@@ -54,3 +60,65 @@ sub check_include
                }
        }
 }
+
+sub check_declarations
+{
+       if ($line =~m/^\s*extern\b/) {
+               printf STDERR "$filename:$lineno: " .
+                             "userspace cannot call function or variable " .
+                             "defined in the kernel\n";
+       }
+}
+
+sub check_config
+{
+       if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
+               printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
+       }
+}
+
+my $linux_asm_types;
+sub check_asm_types()
+{
+       if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
+               return;
+       }
+       if ($lineno == 1) {
+               $linux_asm_types = 0;
+       } elsif ($linux_asm_types >= 1) {
+               return;
+       }
+       if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
+               $linux_asm_types = 1;
+               printf STDERR "$filename:$lineno: " .
+               "include of <linux/types.h> is preferred over <asm/types.h>\n"
+               # Warn until headers are all fixed
+               #$ret = 1;
+       }
+}
+
+my $linux_types;
+sub check_sizetypes
+{
+       if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
+               return;
+       }
+       if ($lineno == 1) {
+               $linux_types = 0;
+       } elsif ($linux_types >= 1) {
+               return;
+       }
+       if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
+               $linux_types = 1;
+               return;
+       }
+       if ($line =~ m/__[us](8|16|32|64)\b/) {
+               printf STDERR "$filename:$lineno: " .
+                             "found __[us]{8,16,32,64} type " .
+                             "without #include <linux/types.h>\n";
+               $linux_types = 2;
+               # Warn until headers are all fixed
+               #$ret = 1;
+       }
+}
+