From b62b2f3dc75d15d570344656f950502afeb2dc8d Mon Sep 17 00:00:00 2001
From: Pascal Rigaux <pixel@mandriva.com>
Date: Tue, 15 Jan 2002 21:18:00 +0000
Subject: encrypted filesystem handling: - using losetup - add "Options" for
 partitions in diskdrake (expert mode)

---
 perl-install/c/stuff.xs.pm  | 42 --------------------------------------
 perl-install/devices.pm     | 35 +++++++++++++++++++++++++-------
 perl-install/fs.pm          | 49 ++++++++++++++++++++++++++++-----------------
 perl-install/fsedit.pm      |  1 +
 perl-install/install_any.pm |  2 +-
 perl-install/share/list     |  1 +
 6 files changed, 62 insertions(+), 68 deletions(-)

diff --git a/perl-install/c/stuff.xs.pm b/perl-install/c/stuff.xs.pm
index b57b471e2..59d8fe232 100644
--- a/perl-install/c/stuff.xs.pm
+++ b/perl-install/c/stuff.xs.pm
@@ -412,48 +412,6 @@ kernel_version()
   OUTPUT:
   RETVAL
 
-int
-set_loop(dev_fd, file)
-  int dev_fd
-  char *file
-  CODE:
-  RETVAL = 0;
-{
-  struct loop_info loopinfo;
-  int file_fd = open(file, O_RDWR);
-
-  if (file_fd < 0) return;
-
-  memset(&loopinfo, 0, sizeof(loopinfo));
-  strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
-  loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
-
-  if (ioctl(dev_fd, LOOP_SET_FD, file_fd) < 0) return;
-  if (ioctl(dev_fd, LOOP_SET_STATUS, &loopinfo) < 0) {
-    ioctl(dev_fd, LOOP_CLR_FD, 0);
-    return;
-  }
-  close(file_fd);
-  RETVAL = 1;
-}
-  OUTPUT:
-  RETVAL
-
-int
-del_loop(device)
-  char *device
-  CODE:
-  RETVAL = 0;
-{
-  int fd;
-  if ((fd = open(device, O_RDONLY)) < 0) return;
-  if (ioctl(fd, LOOP_CLR_FD, 0) < 0) return;
-  close(fd);
-  RETVAL = 1;
-}
-  OUTPUT:
-  RETVAL
-
 int
 prom_open()
 
diff --git a/perl-install/devices.pm b/perl-install/devices.pm
index 7228f9410..4ccac4901 100644
--- a/perl-install/devices.pm
+++ b/perl-install/devices.pm
@@ -32,17 +32,38 @@ sub size($) {
     $low + 1;
 }
 
+sub del_loop {
+    my ($dev) = @_;
+    run_program::run("losetup", "-d", $dev);
+}
+sub find_free_loop {
+    foreach (0..7) {
+	my $dev = make("loop$_");
+	{
+	    local *F;
+	    sysopen F, $dev, 2 or next;
+	    !ioctl(F, c::LOOP_GET_STATUS(), my $tmp) && $! == 6 or next; #- 6 == ENXIO
+	    close F;
+	}
+	return $dev;
+    }
+    die "no free loop found";
+}
 sub set_loop {
-    my ($file) = @_;
+    my ($file, $encrypt_key, $encryption) = @_;
+    my $dev = find_free_loop();
 
-    foreach (0..7) {
+    if ($encrypt_key && $encryption) {
+	my $cmd = "losetup -p 0 -e $encryption $dev $file";
+	log::l("calling $cmd");
 	local *F;
-	my $dev = make("loop$_");
-	sysopen F, $dev, 2 or next;
-	!ioctl(F, c::LOOP_GET_STATUS(), my $tmp) && $! == 6 or next; #- 6 == ENXIO
-	log::l("trying with loop $dev");
-	return c::set_loop(fileno F, $file) && $dev;
+	open F, "|$cmd";
+	print F $encrypt_key;
+	close F or die "losetup failed";
+    } else {
+	run_program::run("losetup", $dev, $file) or return;
     }
+    $dev;
 }
 
 sub entry {
diff --git a/perl-install/fs.pm b/perl-install/fs.pm
index 160d939a3..9a12da97e 100644
--- a/perl-install/fs.pm
+++ b/perl-install/fs.pm
@@ -159,7 +159,7 @@ sub write_fstab {
 	my ($freq, $passno) =
 	  exists $_->{freq} ?
 	    ($_->{freq}, $_->{passno}) :
-	  isTrueFS($_) ? 
+	  isTrueFS($_) && $_->{options} !~ /encryption=/ ? 
 	    (1, $_->{mntpoint} eq '/' ? 1 : loopback::carryRootLoopback($_) ? 0 : 2) : 
 	    (0, 0);
 
@@ -232,6 +232,8 @@ sub mount_options_unpack {
 	$non_defaults->{$_} = 1 foreach @$l;
     }
 
+    $non_defaults->{encrypted} = 1 if !$part->{isFormatted} || isSwap($part);
+
     $non_defaults->{supermount} = 1 if member(type2fs($part), 'auto', @auto_fs);
 
     my $defaults = { reverse %$non_defaults };
@@ -488,33 +490,35 @@ sub real_format_part {
 
     $part->{isFormatted} and return;
 
+    my $dev = $part->{real_device} || $part->{device};
+
     my @options = $part->{toFormatCheck} ? "-c" : ();
-    log::l("formatting device $part->{device} (type ", type2name($part->{type}), ")");
+    log::l("formatting device $dev (type ", type2name($part->{type}), ")");
 
     if (isExt2($part)) {
 	push @options, "-F" if isLoopback($part);
 	push @options, "-m", "0" if $part->{mntpoint} =~ m|^/home|;
-	format_ext2($part->{device}, @options);
+	format_ext2($dev, @options);
     } elsif (isThisFs("ext3", $part)) {
 	push @options, "-m", "0" if $part->{mntpoint} =~ m|^/home|;
-        format_ext3($part->{device}, @options);
+        format_ext3($dev, @options);
     } elsif (isThisFs("reiserfs", $part)) {
-        format_reiserfs($part->{device}, @options, if_(c::kernel_version() =~ /^\Q2.2/, "-v", "1"));
+        format_reiserfs($dev, @options, if_(c::kernel_version() =~ /^\Q2.2/, "-v", "1"));
     } elsif (isThisFs("xfs", $part)) {
-        format_xfs($part->{device}, @options);
+        format_xfs($dev, @options);
     } elsif (isThisFs("jfs", $part)) {
-        format_jfs($part->{device}, @options);
+        format_jfs($dev, @options);
     } elsif (isDos($part)) {
-        format_dos($part->{device}, @options);
+        format_dos($dev, @options);
     } elsif (isWin($part)) {
-        format_dos($part->{device}, @options, '-F', 32);
+        format_dos($dev, @options, '-F', 32);
     } elsif (isThisFs('hfs', $part)) {
-        format_hfs($part->{device}, @options, '-l', "Untitled");
+        format_hfs($dev, @options, '-l', "Untitled");
     } elsif (isAppleBootstrap($part)) {
-        format_hfs($part->{device}, @options, '-l', "bootstrap");
+        format_hfs($dev, @options, '-l', "bootstrap");
     } elsif (isSwap($part)) {
 	my $check_blocks = grep { /^-c$/ } @options;
-        swap::make($part->{device}, $check_blocks);
+        swap::make($dev, $check_blocks);
     } else {
 	die _("I don't know how to format %s in type %s", $_->{device}, type2name($_->{type}));
     }
@@ -535,6 +539,14 @@ sub format_part {
 ################################################################################
 # mounting functions
 ################################################################################
+sub set_loop {
+    my ($part) = @_;
+    if (!$part->{real_device}) {
+	eval { modules::load('loop') };
+	$part->{real_device} = devices::set_loop(devices::make($part->{device}), $part->{encrypt_key}, $part->{options} =~ /encryption=(\w+)/);
+    }
+}
+
 sub formatMount_part {
     my ($part, $raids, $fstab, $prefix, $callback) = @_;
 
@@ -544,7 +556,9 @@ sub formatMount_part {
     if (my $p = up_mount_point($part->{mntpoint}, $fstab)) {
 	formatMount_part($p, $raids, $fstab, $prefix, $callback) unless loopback::carryRootLoopback($part);
     }
-
+    if ($part->{encrypt_key}) {
+	set_loop($part);
+    }
     if ($part->{toFormat}) {
 	$callback->($part) if $callback;
 	format_part($raids, $part, $prefix);
@@ -662,14 +676,13 @@ sub mount_part {
 	} else {
 	    $part->{mntpoint} or die "missing mount point for partition $part->{device}";
 
-	    my $dev = $part->{device};
 	    my $mntpoint = ($prefix || '') . $part->{mntpoint};
-	    if (isLoopback($part)) {
-		eval { modules::load('loop') };
-		$dev = $part->{real_device} = devices::set_loop($part->{device}) || die;
+	    if (isLoopback($part) || $part->{encrypt_key}) {
+		set_loop($part);
 	    } elsif (loopback::carryRootLoopback($part)) {
 		$mntpoint = "/initrd/loopfs";
 	    }
+	    my $dev = $part->{real_device} || $part->{device};
 	    mount($dev, $mntpoint, type2fs($part), $rdonly, $part->{options});
 	    rmdir "$mntpoint/lost+found";
 	}
@@ -689,7 +702,7 @@ sub umount_part {
 	    umount("/initrd/loopfs");
 	} else {
 	    umount(($prefix || '') . $part->{mntpoint} || devices::make($part->{device}));
-	    c::del_loop(delete $part->{real_device}) if isLoopback($part);
+	    devices::del_loop(delete $part->{real_device}) if $part->{real_device};
 	}
     }
     $part->{isMounted} = 0;
diff --git a/perl-install/fsedit.pm b/perl-install/fsedit.pm
index 9a3f0bb32..90554f509 100644
--- a/perl-install/fsedit.pm
+++ b/perl-install/fsedit.pm
@@ -416,6 +416,7 @@ sub suggest_part {
     $part->{mntpoint} = $best->{mntpoint};
     $part->{type} = $best->{type} if !(isTrueFS($best) && isTrueFS($part));
     $part->{size} = computeSize($part, $best, $all_hds, $suggestions);
+    $part->{options} = $best->{options} if $best->{options};
     1;
 }
 
diff --git a/perl-install/install_any.pm b/perl-install/install_any.pm
index ab39349c4..5c797d1a0 100644
--- a/perl-install/install_any.pm
+++ b/perl-install/install_any.pm
@@ -787,7 +787,7 @@ sub getAndSaveAutoInstallFloppy {
 
 	fs::umount($mountdir);
 	rmdir $mountdir;
-	c::del_loop($dev);
+	devices::del_loop($dev);
 	require commands;
 	commands::dd("if=$imagefile", "of=$where", "bs=1440", "count=1024");
 	unlink $imagefile;
diff --git a/perl-install/share/list b/perl-install/share/list
index 03297f105..c44614670 100644
--- a/perl-install/share/list
+++ b/perl-install/share/list
@@ -14,6 +14,7 @@
 /sbin/tune2fs
 /sbin/fdisk
 /sbin/insmod
+/sbin/losetup
 /sbin/mke2fs
 /sbin/resize2fs
 /sbin/dumpe2fs
-- 
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