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|
use strict;
my $disk = "\0" x (1024*1024);
BEGIN {
# Call the debug function to check it works.
Nbdkit::debug ("hello world!");
# Check some expected constants are defined. Since these constants
# are defined by the nbdkit ABI, they should never change so checking
# their absolute values here ought to be fine.
die unless $Nbdkit::FLAG_MAY_TRIM == 1;
die unless $Nbdkit::FLAG_FUA == 2;
die unless $Nbdkit::FLAG_REQ_ONE == 4;
die unless $Nbdkit::FUA_NATIVE == 2;
die unless $Nbdkit::CACHE_EMULATE == 1;
die unless $Nbdkit::EXTENT_ZERO == 2;
}
sub config_complete
{
}
sub open
{
my $readonly = shift;
Nbdkit::debug ("perl plugin opened, readonly=" . $readonly);
my $h = { readonly => $readonly };
return $h;
}
sub close
{
my $h = shift;
}
sub get_size
{
my $h = shift;
return length ($disk);
}
sub can_write
{
my $h = shift;
return 1;
}
sub can_flush
{
my $h = shift;
return 1;
}
sub is_rotational
{
my $h = shift;
return 0;
}
sub can_trim
{
my $h = shift;
return 1;
}
sub pread
{
my $h = shift;
my $count = shift;
my $offset = shift;
return substr ($disk, $offset, $count);
}
sub pwrite
{
my $h = shift;
my $buf = shift;
my $count = length ($buf);
my $offset = shift;
substr ($disk, $offset, $count) = $buf;
}
sub flush
{
my $h = shift;
}
sub trim
{
my $h = shift;
my $count = shift;
my $offset = shift;
}
|
