/
Block.pm
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/
Block.pm
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package Proxmox::Sys::Block;
use strict;
use warnings;
use File::Basename;
use IO::File;
use List::Util qw(first);
use Proxmox::Install::ISOEnv;
use Proxmox::Sys::Command qw(syscmd);
use Proxmox::Sys::File qw(file_read_firstline);
use Proxmox::Sys::Udev;
use Proxmox::UI;
use base qw(Exporter);
our @EXPORT_OK = qw(get_cached_disks wipe_disk partition_bootable_disk);
my sub is_same_file {
my ($file_a, $file_b) = @_;
my ($dev_a ,$ino_a) = stat($file_a);
my ($dev_b, $ino_b) = stat($file_b);
return 0 if !($dev_a && $dev_b && $ino_a && $ino_b);
return $ino_a == $ino_b && $dev_a == $dev_b;
}
my sub find_stable_path {
my ($stabledir, $bdev) = @_;
foreach my $path (<$stabledir/*>) {
if (is_same_file($path, $bdev)) {
return $path;
}
}
return;
}
sub get_disk_by_id_path {
my ($dev) = @_;
return find_stable_path('/dev/disk/by-id', $dev);
}
sub get_dev_uuid {
my $bdev = shift;
my $by_uuid_path = find_stable_path("/dev/disk/by-uuid", $bdev);
return basename($by_uuid_path);
}
# [
# [ <index>, "/dev/path", size_in_blocks, "model", logical_blocksize, <name as found in /sys/block> ]
# ]
my sub hd_list {
if (is_test_mode()) {
my $disks = Proxmox::Install::ISOEnv::get_test_images();
my $i = 0;
return [
map { [ $i++, $_, int((-s $_)/512), "TESTDISK", 512, "/sys/block/$_"] } $disks->@*
];
}
my $res = [];
my $count = 0;
foreach my $bd (</sys/block/*>) {
next if $bd =~ m|^/sys/block/ram\d+$|;
next if $bd =~ m|^/sys/block/loop\d+$|;
next if $bd =~ m|^/sys/block/md\d+$|;
next if $bd =~ m|^/sys/block/dm-.*$|;
next if $bd =~ m|^/sys/block/fd\d+$|;
next if $bd =~ m|^/sys/block/sr\d+$|;
# TODO: switch to get_udev_properties and switch from regex to checking the parsed properties
my $info = Proxmox::Sys::Udev::query_udevadm_info($bd);
next if !$info;
next if $info !~ m/^E: DEVTYPE=disk$/m;
next if $info =~ m/^E: ID_CDROM/m;
next if $info =~ m/^E: ID_FS_TYPE=iso9660/m;
my ($name) = $info =~ m/^N: (\S+)$/m;
next if !$name;
my $dev_path;
if ($info =~ m/^E: DEVNAME=(\S+)$/m) {
$dev_path = $1;
} else {
$dev_path = "/dev/$name";
}
my $size = file_read_firstline("$bd/size");
next if !$size;
chomp $size;
next if $size !~ m/^\d+$/;
$size = int($size);
my $model = file_read_firstline("$bd/device/model") || '';
$model =~ s/^\s+//;
$model =~ s/\s+$//;
if (length ($model) > 30) {
$model = substr ($model, 0, 30);
}
my $logical_bsize = file_read_firstline("$bd/queue/logical_block_size") // '';
chomp $logical_bsize;
if ($logical_bsize && $logical_bsize =~ m/^\d+$/) {
$logical_bsize = int($logical_bsize);
} else {
$logical_bsize = undef;
}
push @$res, [$count++, $dev_path, $size, $model, $logical_bsize, "/sys/block/$name"];
}
return $res;
}
my $cached_disks;
sub cache_disks {
$cached_disks = hd_list();
}
sub get_cached_disks {
cache_disks() if !defined($cached_disks);
return $cached_disks;
}
sub find_cached_disk_by_devname {
my ($dev, $noerr) = @_;
my $disks = get_cached_disks();
my $record = first { $_->[1] eq $dev } $disks->@*; # ($disk, $devname, $size, $model, $lbsize)
die "no such disk device '$dev'\n" if !defined($record) && !$noerr;
return $record;
}
sub hd_size {
my ($dev) = @_;
my ($_disk, $_name, $size) = find_cached_disk_by_devname($dev)->@*;
return int($size / 2);
}
sub logical_blocksize {
my ($dev) = @_;
my ($_disk, $_dev, $_size, $_model, $logical_bsize) = find_cached_disk_by_devname($dev)->@*;
return $logical_bsize;
}
sub get_partition_dev {
my ($dev, $partnum) = @_;
if ($dev =~ m|^/dev/sd([a-h]?[a-z]\|i[a-v])$|) {
return "${dev}$partnum";
} elsif ($dev =~ m|^/dev/xvd[a-z]$|) {
# Citrix Hypervisor blockdev
return "${dev}$partnum";
} elsif ($dev =~ m|^/dev/[hxev]d[a-z]$|) {
return "${dev}$partnum";
} elsif ($dev =~ m|^/dev/[^/]+/c\d+d\d+$|) {
return "${dev}p$partnum";
} elsif ($dev =~ m|^/dev/[^/]+/d\d+$|) {
return "${dev}p$partnum";
} elsif ($dev =~ m|^/dev/[^/]+/hd[a-z]$|) {
return "${dev}$partnum";
} elsif ($dev =~ m|^/dev/nvme\d+n\d+$|) {
return "${dev}p$partnum";
} else {
die "unable to get device for partition $partnum on device $dev\n";
}
}
sub udevadm_trigger_block {
my ($nowait) = @_;
sleep(1) if !$nowait; # give kernel time to reread part table
# trigger udev to create /dev/disk/by-uuid
syscmd("udevadm trigger --subsystem-match block");
syscmd("udevadm settle --timeout 10");
};
sub udevadm_disk_details {
my $disks = get_cached_disks();
my $result = {};
for my $disk_info ($disks->@*) {
my ($dev_index, $sys_path) = ($disk_info->[0], $disk_info->[5]);
$result->{$dev_index} = Proxmox::Sys::Udev::get_udev_properties($sys_path);
}
return $result;
}
sub wipe_disk {
my ($disk) = @_;
# sort longest first as we need to cleanup depth-first
my @partitions = sort { length($b) <=> length($a) }
split("\n", `lsblk --output kname --noheadings --path --list $disk`);
for my $part (@partitions) {
next if $part eq $disk;
next if $part !~ /^\Q$disk\E/;
eval { syscmd("pvremove -ff -y $part"); };
eval { syscmd("zpool labelclear -f $part"); };
eval { syscmd("dd if=/dev/zero of=$part bs=1M count=16"); };
}
eval { syscmd(['wipefs', '-a', @partitions]) };
warn "$@" if $@;
};
sub partition_bootable_disk {
my ($target_dev, $maxhdsizegb, $ptype) = @_;
die "too dangerous" if is_test_mode();
die "unknown partition type '$ptype'"
if !($ptype eq '8E00' || $ptype eq '8300' || $ptype eq 'BF01');
my $hdsize = hd_size($target_dev); # size in KB (1024 bytes)
# For bigger disks default to generous ESP size to allow users having multiple kernels/UKI's
my $esp_size = $hdsize > 100 * 1024 * 1024 ? 1024 : 512; # MB
my $esp_end = $esp_size + 1;
my $restricted_hdsize_mb = 0; # 0 ==> end of partition
if ($maxhdsizegb) {
my $maxhdsize = $maxhdsizegb * 1024 * 1024;
if ($maxhdsize < $hdsize) {
$hdsize = $maxhdsize;
$restricted_hdsize_mb = int($hdsize/1024) . 'M';
}
}
my $hdgb = int($hdsize/(1024*1024));
my ($hard_limit, $soft_limit) = (2, 8);
die "root disk '$target_dev' too small (${hdgb} GB < $hard_limit GB)\n" if $hdgb < $hard_limit;
if ($hdgb < $soft_limit) {
my $response_ok = Proxmox::UI::prompt(
"Root disk space ${hdgb} GB is below recommended minimum space of $soft_limit GB,"
." installation might not be successful! Continue?"
);
die "root disk '$target_dev' too small (${hdgb} GB < $soft_limit GB), and warning not accepted.\n"
if !$response_ok;
}
syscmd("sgdisk -Z ${target_dev}");
# 1 - BIOS boot partition (Grub Stage2): first free 1 MB
# 2 - EFI ESP: next free 512 or 1024 MB
# 3 - OS/Data partition: rest, up to $maxhdsize in MB
my $grubbootdev = get_partition_dev($target_dev, 1);
my $efibootdev = get_partition_dev($target_dev, 2);
my $osdev = get_partition_dev ($target_dev, 3);
my $pcmd = ['sgdisk'];
my $pnum = 2;
push @$pcmd, "-n${pnum}:1M:+${esp_size}M", "-t$pnum:EF00";
$pnum = 3;
push @$pcmd, "-n${pnum}:${esp_end}M:${restricted_hdsize_mb}", "-t$pnum:$ptype";
push @$pcmd, $target_dev;
my $os_size = $hdsize - $esp_end * 1024; # efi + 1M bios_boot + 1M alignment
syscmd($pcmd) == 0 ||
die "unable to partition harddisk '${target_dev}'\n";
my $blocksize = logical_blocksize($target_dev);
if ($blocksize != 4096) {
$pnum = 1;
$pcmd = ['sgdisk', '-a1', "-n$pnum:34:2047", "-t$pnum:EF02" , $target_dev];
syscmd($pcmd) == 0 ||
die "unable to create bios_boot partition '${target_dev}'\n";
}
udevadm_trigger_block();
foreach my $part ($efibootdev, $osdev) {
syscmd("dd if=/dev/zero of=$part bs=1M count=256") if -b $part;
}
return ($os_size, $osdev, $efibootdev);
}
1;