diff options
Diffstat (limited to 'perl-install/devices.pm')
| -rw-r--r-- | perl-install/devices.pm | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/perl-install/devices.pm b/perl-install/devices.pm new file mode 100644 index 000000000..10badc4ec --- /dev/null +++ b/perl-install/devices.pm @@ -0,0 +1,234 @@ +package devices; # $Id: devices.pm 260603 2009-09-18 12:20:27Z pterjan $ + +use diagnostics; +use strict; + +use common; +use run_program; +use log; +use c; + +sub del_loop { + my ($dev) = @_; + run_program::run("losetup", "-d", $dev); +} +sub find_free_loop() { + foreach (0..255) { + my $dev = make("loop$_"); + sysopen(my $F, $dev, 2) or next; + !ioctl($F, c::LOOP_GET_STATUS(), my $_tmp) && $! == 6 or next; #- 6 == ENXIO + return $dev; + } + die "no free loop found"; +} +sub set_loop { + my ($file, $o_encrypt_key, $o_encryption) = @_; + require modules; + eval { modules::load('loop') }; + my $dev = find_free_loop(); + + if ($o_encrypt_key && $o_encryption) { + eval { modules::load('cryptoloop', arch() =~ /i.86/ ? 'aes-i586' : 'aes') }; + my $cmd = "losetup -p 0 -e $o_encryption $dev $file"; + log::l("calling $cmd"); + open(my $F, "|$cmd"); + print $F $o_encrypt_key; + close $F or die "losetup failed"; + } else { + run_program::run("losetup", $dev, $file) + || run_program::run("losetup", "-r", $dev, $file) or return; + } + $dev; +} + +sub find_compressed_image { + my ($name) = @_; + foreach (0..255) { + my $dev = make("loop$_"); + my ($file) = `losetup $dev 2>/dev/null` =~ m!\((.*?)\)! or return; + $file =~ s!^/sysroot/!/!; + basename($file) eq $name and return $dev, $file; + } + undef; +} + +sub get_dynamic_major { + my ($name) = @_; + cat_('/proc/devices') =~ /^(\d+) \Q$name\E$/m && $1; +} + +sub init_device_mapper() { + require modules; + eval { modules::load('dm-mod') }; + make('urandom'); + my $control = '/dev/mapper/control'; + if (! -e $control) { + my ($major) = get_dynamic_major('misc') or return; + my ($minor) = cat_('/proc/misc') =~ /(\d+) device-mapper$/m or return; + mkdir_p(dirname($control)); + syscall_('mknod', $control, c::S_IFCHR() | 0600, makedev($major, $minor)) or die "mknod $control failed: $!"; + } +} + +sub entry { + my ($type, $major, $minor); + local ($_) = @_; + + if (/^0x([\da-f]{3,4})$/i) { + $type = c::S_IFBLK(); + ($major, $minor) = unmakedev(hex $1); + } elsif (/^sd(.)(\d{0,2})/) { + $type = c::S_IFBLK(); + $major = 8; + $minor = 16 * (ord($1) - ord('a')) + ($2 || 0); + } elsif (/^(vd.)(\d{0,2})/) { + my $path = $2 ? "/sys/block/$1/$1$2/dev" : "/sys/block/$1/dev"; + ($major, $minor) = split(':', chomp_(cat_($path))); + $type = c::S_IFBLK(); + } elsif (/^hd(.)(\d{0,2})/) { + $type = c::S_IFBLK(); + ($major, $minor) = + @{ ${{'a' => [3, 0], 'b' => [3, 64], + 'c' => [22,0], 'd' => [22,64], + 'e' => [33,0], 'f' => [33,64], + 'g' => [34,0], 'h' => [34,64], + 'i' => [56,0], 'j' => [56,64], + 'k' => [57,0], 'l' => [57,64], + 'm' => [88,0], 'n' => [88,64], + 'o' => [89,0], 'p' => [89,64], + 'q' => [90,0], 'r' => [90,64], + 's' => [91,0], 't' => [91,64], + }}{$1} or internal_error("unknown device $_") }; + $minor += $2 || 0; + } elsif (/^ram(.*)/) { + $type = c::S_IFBLK(); + $major = 1; + $minor = $1 eq '' ? 1 : $1; + } elsif (m|^rd/c(\d+)d(\d+)(p(\d+))?|) { + # dac 960 "rd/cXdXXpX" + $type = c::S_IFBLK(); + $major = 48 + $1; + $minor = 8 * $2 + $4; + } elsif (m,(ida|cciss)/c(\d+)d(\d+)(?:p(\d+))?,) { + # Compaq Smart Array "ida/c0d0{p1}" + $type = c::S_IFBLK(); + $major = ($1 eq 'ida' ? 72 : 104) + $2; + $minor = 16 * $3 + ($4 || 0); + } elsif (m,(ataraid)/d(\d+)(?:p(\d+))?,) { + # ATA raid "ataraid/d0{p1}" + $type = c::S_IFBLK(); + $major = 114; + $minor = 16 * $1 + ($2 || 0); + } elsif (my ($prefix, $nb) = /(.*?)(\d+)$/) { + my $f = ${{"fd" => sub { c::S_IFBLK(), 2, 0 }, + "hidbp-mse-" => sub { c::S_IFCHR(), 10, 32 }, + "lp" => sub { c::S_IFCHR(), 6, 0 }, + "usb/lp" => sub { c::S_IFCHR(), 180, 0 }, + "input/event" => sub { c::S_IFCHR(), 13, 64 }, + "loop" => sub { c::S_IFBLK(), 7, 0 }, + "md" => sub { c::S_IFBLK(), 9, 0 }, + "nst" => sub { c::S_IFCHR(), 9, 128 }, + "sr" => sub { c::S_IFBLK(), 11, 0 }, + "tty" => sub { c::S_IFCHR(), 4, 0 }, + "ttyS" => sub { c::S_IFCHR(), 4, 64 }, + "ubd/" => sub { c::S_IFBLK(), 98, 0 }, + "dm-" => sub { c::S_IFBLK(), get_dynamic_major('device-mapper'), 0 }, + }}{$prefix} or internal_error("unknown device $prefix $nb"); + ($type, $major, $minor) = $f->(); + $minor += $nb; + } + unless ($type) { + ($type, $major, $minor) = + @{ ${{"aztcd" => [ c::S_IFBLK(), 29, 0 ], + "bpcd" => [ c::S_IFBLK(), 41, 0 ], + "cdu31a" => [ c::S_IFBLK(), 15, 0 ], + "cdu535" => [ c::S_IFBLK(), 24, 0 ], + "cm206cd" => [ c::S_IFBLK(), 32, 0 ], + "gscd" => [ c::S_IFBLK(), 16, 0 ], + "mcd" => [ c::S_IFBLK(), 23, 0 ], + "mcdx" => [ c::S_IFBLK(), 20, 0 ], + "mem" => [ c::S_IFCHR(), 1, 1 ], + "optcd" => [ c::S_IFBLK(), 17, 0 ], + "kbd" => [ c::S_IFCHR(), 11, 0 ], + "psaux" => [ c::S_IFCHR(), 10, 1 ], + "atibm" => [ c::S_IFCHR(), 10, 3 ], + "random" => [ c::S_IFCHR(), 1, 8 ], + "urandom" => [ c::S_IFCHR(), 1, 9 ], + "sbpcd" => [ c::S_IFBLK(), 25, 0 ], + "sjcd" => [ c::S_IFBLK(), 18, 0 ], + "tty" => [ c::S_IFCHR(), 5, 0 ], + "input/mice" + => [ c::S_IFCHR(), 13, 63 ], + "adbmouse" => [ c::S_IFCHR(), 10, 10 ], #- PPC + "vcsa" => [ c::S_IFCHR(), 7, 128 ], + "zero" => [ c::S_IFCHR(), 1, 5 ], + "null" => [ c::S_IFCHR(), 1, 3 ], + + "initrd" => [ c::S_IFBLK(), 1, 250 ], + "console" => [ c::S_IFCHR(), 5, 1 ], + "systty" => [ c::S_IFCHR(), 4, 0 ], + "lvm" => [ c::S_IFBLK(), 109, 0 ], + }}{$_} or internal_error("unknown device $_") }; + } + ($type, $major, $minor); +} + + +sub make($) { + local $_ = my $file = $_[0]; + + if (m!^(.*/dev)/(.*)!) { + $_ = $2; + } else { + $file =~ m|^/| && -e $file or $file = "/dev/$_"; + } + -e $file and return $file; #- assume nobody takes fun at creating files named as device + + my ($type, $major, $minor) = entry($_); + + #- make a directory for this inode if needed. + mkdir_p(dirname($file)); + + syscall_('mknod', $file, $type | 0600, makedev($major, $minor)) or do { + die "mknod failed (dev $_): $!" if ! -e $file; # we may have raced with udev + }; + + $file; +} + +sub simple_partition_scan { + my ($part) = @_; + $part->{device} =~ /([vhs]d[a-z])(\d+)$/; +} +sub part_number { + my ($part) = @_; + (simple_partition_scan($part))[1]; +} +sub part_prefix { + my ($part) = @_; + (simple_partition_scan($part))[0]; +} + +sub prefix_for_dev { + my ($dev) = @_; + $dev . ($dev =~ /\d$/ || $dev =~ m!mapper/! ? 'p' : ''); +} + +sub should_prefer_UUID { + my ($dev) = @_; + $dev =~ /^(hd|sd|vd)/; +} + +sub symlink_now_and_register { + my ($if_struct, $of) = @_; + my $if = $if_struct->{device}; + + #- add a specific udev script, we can't do it with a udev rule, + #- eg, ttySL0 is a symlink created by a daemon + output_with_perm("$::prefix/etc/udev/devices.d/$of.nodes", 0644, "L $of $if\n"); + + symlinkf($if, "$::prefix/dev/$of"); +} + + +1; |