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* no_commentPascal Rigaux2000-03-143-2/+18
* no_commentPascal Rigaux2000-03-011-3/+3
* no_commentPascal Rigaux2000-02-241-2/+2
* no_commentPascal Rigaux2000-02-231-2/+2
* no_commentPascal Rigaux2000-02-237-0/+403
* no_commentPascal Rigaux2000-02-183-0/+44
generated by cgit v1.2.1 (git 2.21.0) at 2024-09-09 18:10:44 +0000
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package devices; # $Id$

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', 'cbc', if_(arch() =~ /i.86/, 'aes-i586'), if_( arch() =~ /x86_64/, 'aes-x86_64'), 'aes_generic') };
	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})/) {
        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) = @_;
    $part->{device} =~ /([hs]d[a-z])(\d+)$/;
}
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)/;
}

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");
}


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generated by cgit v1.2.1 (git 2.21.0) at 2024-09-09 18:10:44 +0000