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package fs::mount; # $Id: mount.pm 267516 2010-04-12 16:40:47Z pterjan $
use diagnostics;
use strict;
use run_program;
use common;
use fs::type;
use log;
sub set_loop {
my ($part) = @_;
$part->{device} ||= fs::get::mntpoint_prefixed($part->{loopback_device}) . $part->{loopback_file};
$part->{real_device} ||= devices::set_loop(devices::make($part->{device}), $part->{encrypt_key}, $part->{options} =~ /encryption=(\w+)/);
}
sub swapon {
my ($dev) = @_;
log::l("swapon called with $dev");
syscall_('swapon', devices::make($dev), 0) or die "swapon($dev) failed: $!";
}
sub swapoff {
my ($dev) = @_;
syscall_('swapoff', devices::make($dev)) or die "swapoff($dev) failed: $!";
}
sub mount {
my ($dev, $where, $fs, $b_rdonly, $o_options, $o_wait_message) = @_;
log::l("mounting $dev on $where as type $fs, options $o_options");
mkdir_p($where);
$fs or log::l("not mounting $dev partition"), return;
{
my @fs_modules = qw(btrfs ext3 ext4 hfs jfs nilfs2 nfs ntfs romfs reiserfs ufs xfs vfat);
my @types = (qw(ext2 proc sysfs usbfs usbdevfs iso9660 devfs devpts auto ntfs-3g), @fs_modules);
push @types, 'smb', 'cifs', 'davfs2' if !$::isInstall;
if (!member($fs, @types)) {
log::l("skipping mounting $dev partition ($fs)");
return;
}
if ($::isInstall) {
if (member($fs, @fs_modules)) {
eval { modules::load($fs) };
} elsif ($fs eq 'iso9660') {
eval { modules::load('isofs') };
}
}
}
$where =~ s|/$||;
my @mount_opt = split(',', $o_options || '');
if ($::isInstall) {
#- those options need nls_XXX modules, and we don't this at install
@mount_opt = grep { $_ ne 'utf8' && !/^iocharset=/ } @mount_opt;
}
if ($fs eq 'vfat') {
@mount_opt = 'check=relaxed';
} elsif ($fs eq 'ntfs') {
@mount_opt = () if $::isInstall; # esp. drop nls=xxx option so that we don't need kernel module nls_xxx
} elsif ($fs eq 'nfs') {
push @mount_opt, 'nolock', 'soft', 'intr' if $::isInstall;
} elsif ($fs eq 'jfs' && !$b_rdonly) {
fsck_jfs($dev, $o_wait_message);
} elsif ($fs eq 'ext2' && !$b_rdonly) {
fsck_ext2($dev, $o_wait_message);
} elsif ($fs eq 'davfs2') {
require fs::remote::davfs;
# We have to store credentials in davfs2 secret file before mounting
fs::remote::davfs::mountpoint_credentials_save($where, \@mount_opt);
# username and password options should be handled by /etc/davfs2/secrets file
@mount_opt = grep { !/^(username|password)=/ } @mount_opt;
}
push @mount_opt, 'ro' if $b_rdonly;
$o_wait_message->(N("Mounting partition %s", $dev)) if $o_wait_message;
run_program::run('mount', '-t', $fs, $dev, $where, if_(@mount_opt, '-o', join(',', @mount_opt))) or die N("mounting partition %s in directory %s failed", $dev, $where);
}
sub fsck_ext2 {
my ($dev, $o_wait_message) = @_;
$o_wait_message->(N("Checking %s", $dev)) if $o_wait_message;
foreach ('-a', '-y') {
run_program::raw({ timeout => 60 * 60 }, "fsck.ext2", $_, $dev);
my $err = $?;
if ($err & 0x0100) {
log::l("fsck corrected partition $dev");
}
if ($err & 0xfeff) {
my $txt = sprintf("fsck failed on %s with exit code %d or signal %d", $dev, $err >> 8, $err & 255);
$_ eq '-y' ? die($txt) : cdie($txt);
} else {
last;
}
}
}
sub fsck_jfs {
my ($dev, $o_wait_message) = @_;
$o_wait_message->(N("Checking %s", $dev)) if $o_wait_message;
#- needed if the system is dirty otherwise mounting read-write simply fails
run_program::raw({ timeout => 60 * 60 }, "fsck.jfs", $dev) or do {
my $err = $?;
die "fsck.jfs failed" if $err & 0xfc00;
};
}
#- takes the mount point to umount (can also be the device)
sub umount {
my ($mntpoint) = @_;
$mntpoint =~ s|/$||;
log::l("calling umount($mntpoint)");
run_program::run('umount', $mntpoint) or do {
kill 15, fuzzy_pidofs('^fam\b');
my $err;
run_program::run('umount', '2>', \$err, $mntpoint) or die N("error unmounting %s: %s", $mntpoint, common::to_utf8($err));
};
substInFile { $_ = '' if /(^|\s)$mntpoint\s/ } '/etc/mtab'; #- do not care about error, if we can not read, we will not manage to write... (and mess mtab)
}
sub part {
my ($part, $b_rdonly, $o_wait_message) = @_;
log::l("mount_part: " . join(' ', map { "$_=$part->{$_}" } 'device', 'mntpoint', 'isMounted', 'real_mntpoint', 'device_UUID'));
return if $part->{isMounted} && !($part->{real_mntpoint} && $part->{mntpoint});
unless ($::testing) {
if (isSwap($part)) {
$o_wait_message->(N("Enabling swap partition %s", $part->{device})) if $o_wait_message;
swapon($part->{device});
} elsif ($part->{real_mntpoint}) {
my $mntpoint = fs::get::mntpoint_prefixed($part);
mkdir_p($mntpoint);
run_program::run_or_die('mount', '--move', $part->{real_mntpoint}, $mntpoint);
rmdir $part->{real_mntpoint};
symlinkf $mntpoint, $part->{real_mntpoint};
delete $part->{real_mntpoint};
my $dev = $part->{real_device} || fs::wild_device::from_part('', $part);
run_program::run_or_die('mount', $dev, $mntpoint, '-o', join(',', 'remount', $b_rdonly ? 'ro' : 'rw'));
} else {
$part->{mntpoint} or die "missing mount point for partition $part->{device}";
my $mntpoint = fs::get::mntpoint_prefixed($part);
my $options = $part->{options};
if ($part->{encrypt_key}) {
set_loop($part);
$options = join(',', grep { !/^(encryption=|encrypted$|loop$)/ } split(',', $options)); #- we take care of this, don't let it mount see it
} elsif (isLoopback($part)) {
#- mount will take care, but we must help it
devices::make("loop$_") foreach 0 .. 7;
$options = join(',', uniq('loop', split(',', $options))); #- ensure the loop options is used
} elsif ($part->{options} =~ /encrypted/) {
log::l("skip mounting $part->{device} since we do not have the encrypt_key");
return;
} elsif (fs::type::carry_root_loopback($part)) {
$mntpoint = "/initrd/loopfs";
}
my $dev = $part->{real_device} || fs::wild_device::from_part('', $part);
my $fs_type = $part->{fs_type};
if ($fs_type eq 'auto' && $part->{media_type} eq 'cdrom' && $::isInstall) {
$fs_type = 'iso9660';
} elsif ($fs_type eq 'ntfs-3g' && $::isInstall) {
$fs_type = 'ntfs';
}
mount($dev, $mntpoint, $fs_type, $b_rdonly, $options, $o_wait_message);
if ($options =~ /usrquota|grpquota/ && member($part->{fs_type}, qw(ext3 ext4))) {
if (! find { -e "$mntpoint/$_" } qw(aquota.user aquota.group quota.user quota.group)) {
#- quotacheck will create aquota.user and/or aquota.group,
#- needed for quotas on ext3/ext4.
run_program::run('quotacheck', $mntpoint);
}
}
if (isLoopback($part) && $::isInstall) {
#- since /etc/mtab is symlinked to /proc/mounts, umount will
#- not be able to know it needs to do losetup -d
#- TODO: drop this and have a real /etc/mtab
$part->{real_device} = cat_("/proc/mounts") =~ m!(/dev/\S+)\s+\Q$mntpoint\E\s! && $1;
log::l("XXX $part->{real_device}");
}
}
}
$part->{isMounted} = 1;
set_isFormatted($part, 1); #- assume that if mount works, partition is formatted
}
sub umount_part {
my ($part) = @_;
$part->{isMounted} or return;
unless ($::testing) {
if (isSwap($part)) {
swapoff($part->{device});
} elsif (fs::type::carry_root_loopback($part)) {
umount("/initrd/loopfs");
} else {
umount($part->{real_mntpoint} || fs::get::mntpoint_prefixed($part) || devices::make($part->{device}));
devices::del_loop(delete $part->{real_device}) if $part->{real_device};
}
}
$part->{isMounted} = 0;
}
sub umount_all {
my ($fstab) = @_;
log::l("unmounting all filesystems");
foreach (sort { $b->{mntpoint} cmp $a->{mntpoint} }
grep { $_->{mntpoint} && !$_->{real_mntpoint} || isSwap($_) } @$fstab) {
umount_part($_);
}
}
sub usbfs {
my ($prefix) = @_;
my $fs = cat_('/proc/filesystems') =~ /usbfs/ ? 'usbfs' : 'usbdevfs';
mount('none', "$prefix/proc/bus/usb", $fs);
}
1;
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