4 # Check and possibly rebuild lufs kernel module for the current kernel.
5 # Copyright (C) 2003 Jan Kratochvil <project-captive@jankratochvil.net>
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; exactly version 2 of June 1991 is required
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 use Carp qw(cluck confess);
24 # Do not use any non-core Perl modules here.
25 # Be perl-5.0 compatible (is it needed if we require Linux kernel >= 2.4 ?)
28 my $basedir='@datadir@/lufs';
29 my $vardir='@localstatedir@/lib/lufs';
30 $basedir=~s#\$\Q{prefix}\E#'@prefix@';#ge;
31 $vardir=~s#\$\Q{prefix}\E#'@prefix@';#ge;
32 $vardir="" if $vardir=~/^@/;
33 sub srcdir { my($uname_r)=@_; $basedir."/".($uname_r lt "2.5" ? "2.4" : "2.5"); }
34 my $modbindir=$basedir."/modbin";
35 my @sources=qw(proc.c inode.c dir.c file.c symlink.c);
36 my $tmp_dir="prepmod-tmp-dir";
41 my $kernel_gcc_args="";
44 if ($0 eq "lufsmnt" || $0=~m#/lufsmnt$#) {
46 $lufsmnt_bin='@bindir@/lufsmnt-bin';
51 "kernel",\$kernel, # it must contain "include" subdir
52 "modbindir=s",\$modbindir,
53 "basedir=s",\$basedir,
54 "prebuild",\&prebuild,
55 "kernel-gcc-args=s",\$kernel_gcc_args,
62 my($filename,$optional)=@_;
66 open F,$filename or do { cluck "Open \"$filename\": $!" if !$optional; return ""; };
68 close F or cluck "Close \"$filename\": $!";
76 print STDERR "+ ".join(" ",@args)."\n" if !$quiet;
86 do { ($modproberc=_system $_) and cluck "$_ failed - ignoring"; } for ("depmod -aq","modprobe lufs");
88 exit ($modproberc ? 1 : 0) if !$lufsmnt_bin;
89 do { exec $lufsmnt_bin,@ARGV; };
90 confess "Failed to exec '$lufsmnt_bin': $!";
94 my $filesystems=_readfile "/proc/filesystems"; # 'lufs' may be built-in
95 _pass if $filesystems=~/\blufs$/m;
96 my $modules=_readfile "/proc/modules"; # 'lufs' may be already loaded
97 _pass if $modules=~/^lufs\b/m;
98 _pass if !_system "modprobe lufs 2>/dev/null";
100 my $proc_version=_readfile "/proc/version";
101 my $uname_r=($proc_version=~/^Linux version (\S+)/)[0] || _readfile "uname -r|";
103 confess "Failed to detect kernel version" if !$uname_r;
104 my $uname_r_base=($uname_r=~/^([^-]+)/)[0];
105 print STDERR "Running kernel version: $uname_r (base version $uname_r_base)\n" if !$quiet;
107 my $moduledir="/lib/modules/$uname_r/kernel/fs/lufs";
108 print STDERR "Destination module directory: $moduledir\n" if !$quiet;
110 do { $kernel||=$_ if -d $_; } for ("/lib/modules/$uname_r/build");
111 do { $kernel||=$_ if -d $_; } for ("/usr/src/kernel-headers-$uname_r");
112 do { $kernel||=$_ if -d $_; } for ("/usr/src/linux-$uname_r");
113 do { $kernel||=$_ if -d $_; } for ("/usr/src/linux-$uname_r_base");
114 do { $kernel||=$_ if -d $_; } for ("/usr/src/linux");
116 print STDERR "Failed to find kernel headers for $uname_r" if !$kernel && !$quiet;
119 for ("$vardir/lufs.o") {
121 # Create the 'lufs.o' in our /var/lib directory and only link it
122 # to prevent using obsolete modules after upgrading 'lufs' package.
123 # depmod(1) will take the larget symlink name - we must create directory for it.
124 if (build($kernel,$uname_r,$_)) {
125 do { cluck "Failed to symlink $_"; next; }
126 if _system "rm -rf $moduledir; mkdir -p $moduledir; ln -s $_ $moduledir/lufs.o";
133 for (<$modbindir/*-$uname_r.o>,<$modbindir/*-${uname_r_base}*.o>,<$modbindir/*.o>) {
134 next if _system "rmmod lufs 2>/dev/null; insmod -o lufs -p $_ 2>/dev/null";
135 do { cluck "Failed to symlink $_"; next; } if _system "mkdir -p $moduledir; ln -s $_ $moduledir/lufs.o";
138 confess "lufs module not loaded: $basedir not compilable and no module of $modbindir/*.o usable";
143 my($kernel,$uname_r,$destmodule)=@_;
145 print STDERR "Using kernel sources: $kernel\n" if !$quiet;
146 confess "Kernel sources $kernel do not contain 'include' subdirectory" if ! -d $kernel."/include";
149 do { $kdebug=$_ if !/^@/; } for ('@KDEBUG_FLAGS@');
151 .($quiet ? " 2>/dev/null" : "")
152 ." -O2 -pipe -fomit-frame-pointer -fno-strict-aliasing -mpreferred-stack-boundary=2 -Wall"
153 ." -D__KERNEL__ -DMODULE -DLINUX -DKBUILD_MODNAME=lufs"
155 ." ".$kernel_gcc_args
156 ." -I$kernel/include"
157 ." -I$kernel/include/asm-i386/mach-default"; # gcc should not care if this 2.5 dir does not exist
159 my $config=_readfile "$kernel/.config","optional";
160 my $autoconf=_readfile "$kernel/include/linux/autoconf.h","optional";
161 $cmdline.=" -DMODVERSIONS -include $kernel/include/linux/modversions.h"
163 || $config=~/^CONFIG_MODVERSIONS=y\b/m
164 || $autoconf=~/^#define CONFIG_MODVERSIONS\b/m
165 || (!$config && !$autoconf); # assume modversions if not known
167 my @objects=map({ my $o=$_; $o=~s/[.]c$/.o/; $o; } @sources);
168 return !_system "set -e; mkdir -p `dirname $destmodule`; rm -f $destmodule;"
169 .(!$vardir ? "" : " cd $vardir;")
170 ." $cmdline -c ".join(" ",map({ srcdir($uname_r)."/".$_; } @sources)).";"
171 ." ld -r -o $destmodule ".join(" ",@objects).";"
172 ." rm -f ".join(" ",@objects);
178 my($dir,$vendor,$uname_r)=@_;
180 confess "Unrecognized vendor for dir: $dir" if !$vendor;
181 confess "Unrecognized uname_r for dir: $dir" if !$uname_r;
182 confess "Failed to build $dir" if !build $dir,$uname_r,$modbindir."/lufs-$vendor-$uname_r.o";
190 my $vendor=_readfile "rpm 2>/dev/null --qf '%{VENDOR}' -qp '$rpm' |";
194 $uname_r||=($rpm=~m#/kernel-source-([^-]+-[^-]+)[.][^.]+[.]rpm$#)[0];
195 my $uname_r_base=($uname_r=~/^([^-]+)/)[0];
196 _system "rm -rf $tmp_dir; mkdir $tmp_dir; set -e;"
197 # Here we will extract even some false 'include's but we filter dirs just for speed/space.
198 ." rpm2cpio '$rpm' | (cd $tmp_dir; cpio -id --quiet ./usr/src/linux*/{.config,include/*})"
199 and confess "Extraction of: $rpm";
201 do { $dir||=$_ if -d $_; } for ($tmp_dir."/usr/src/linux-$uname_r");
202 do { $dir||=$_ if -d $_; } for ($tmp_dir."/usr/src/linux-$uname_r_base"); # older RedHat kernels
203 $dir or confess "Kernel source tree not found in: $rpm";
204 prebuild_kernel $dir,$vendor,$uname_r;
205 _system "rm -rf $tmp_dir" and confess "Deletion of: $tmp_dir";
213 chomp (my $debian=_readfile "/etc/debian_version","optional");
214 $vendor="Debian".$debian if $debian && $dir=~m#^/usr/src/#;
216 $uname_r||=($dir=~m#/kernel-headers-([^/]+)/*$#)[0];
217 $uname_r||=($dir=~m#/linux-([^/]+)/*$#)[0];
218 $uname_r||=($dir=~m#^/lib/modules/([^/]+)/build/*$#)[0];
219 prebuild_kernel $dir,$vendor,$uname_r;
224 $vardir=undef(); # we may not yet have /var/lib/lufs
226 do { prebuild_rpm $_; next; } if /[.]rpm$/;
227 do { prebuild_dir $_; next; } if -d $_;
228 confess "Unrecognized kernel: $_";