summaryrefslogtreecommitdiffstats
path: root/perl-install/fs/mount.pm
blob: 0bff5f06ce985db3cd7bd125528b56ea3e5bf31c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
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 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 cannot 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)) {
		$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;