add iscsidirect plugin

This use libiscsi

storage definition:
------------------
portal 192.168.0.1
target iqn.1986-03.com.sun:....

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

PVE/Storage/ISCSIDirectPlugin.pm

@@ -0,0 +1,189 @@
+package PVE::Storage::ISCSIDirectPlugin;
+
+use strict;
+use warnings;
+use IO::File;
+use HTTP::Request;
+use LWP::UserAgent;
+use PVE::Tools qw(run_command file_read_firstline trim dir_glob_regex dir_glob_foreach);
+use PVE::Storage::Plugin;
+use PVE::JSONSchema qw(get_standard_option);
+
+use base qw(PVE::Storage::Plugin);
+
+
+sub iscsi_ls{
+ my ($scfg, $storeid) = @_;
+
+
+    my $portal = $scfg->{portal};
+    my $cmd = ['/usr/bin/iscsi-ls', '-s', 'iscsi://'.$portal ];
+    my $list = {};
+    my $test  = "";
+ 
+     my $errfunc = sub {
+         my $line = shift;
+         $line = trim($line);
+
+         die $line if $line;
+    };
+
+    eval {
+
+	    run_command($cmd, errmsg => "iscsi error", errfunc => $errfunc,outfunc => sub {
+	        my $line = shift;
+	        $line = trim($line);
+	        if( $line =~ /Lun:(\d+)\s+([A-Za-z0-9\-\_\.\:]*)\s+\(Size:(\d+)G\)/ ) {
+		$test = $1;
+	
+	            my $image = $1;
+	            my $size = $3;
+		    
+	            $list->{$storeid}->{$image} = {
+	                name => $image,
+	                size => $size,
+	            };
+	        }
+	    });
+    };
+
+    my $err = $@;
+    die $err if $err && $err !~ m/TESTUNITREADY failed with SENSE KEY/ ;
+    return $list;
+
+}
+
+# Configuration
+
+sub type {
+    return 'iscsidirect';
+}
+
+sub plugindata {
+    return {
+        content => [ {images => 1, none => 1}, { images => 1 }],
+    };
+}
+
+sub options {
+    return {
+        portal => { fixed => 1 },
+        target => { fixed => 1 },
+        nodes => { optional => 1},
+        disable => { optional => 1},
+        content => { optional => 1},
+    };
+}
+
+
+# Storage implementation
+
+sub parse_volname {
+    my ($class, $volname) = @_;
+
+   
+    if ($volname =~ m/^(\d+)$/) {
+	return ('images', $1, undef);
+    }
+
+    die "unable to parse iscsi volume name '$volname'\n";
+
+}
+
+sub path {
+    my ($class, $scfg, $volname) = @_;
+
+    my ($vtype, $lun, $vmid) = $class->parse_volname($volname);
+
+    my $target = $scfg->{target};
+    my $portal = $scfg->{portal};
+
+    my $path = "iscsi://$portal/$target/$lun";
+
+    return ($path, $vmid, $vtype);
+}
+
+
+sub alloc_image {
+    my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
+
+    die "can't allocate space in iscsi storage\n";
+}
+
+sub free_image {
+    my ($class, $storeid, $scfg, $volname) = @_;
+
+    die "can't free space in iscsi storage\n";
+}
+
+
+sub list_images {
+    my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
+
+    my $res = [];
+
+    $cache->{directiscsi} = iscsi_ls($scfg,$storeid) if !$cache->{directiscsi};
+
+    # we have no owner for iscsi devices
+
+    my $target = $scfg->{target};
+
+    if (my $dat = $cache->{directiscsi}->{$storeid}) {
+
+        foreach my $volname (keys %$dat) {
+
+            my $volid = "$storeid:$volname";
+
+            if ($vollist) {
+                my $found = grep { $_ eq $volid } @$vollist;
+                next if !$found;
+            } else {
+                # we have no owner for iscsi devices
+                next if defined($vmid);
+            }
+
+            my $info = $dat->{$volname};
+            $info->{volid} = $volid;
+
+            push @$res, $info;
+        }
+    }
+
+    return $res;
+}
+
+
+sub status {
+    my ($class, $storeid, $scfg, $cache) = @_;
+
+    my $total = 0;
+    my $free = 0;
+    my $used = 0;
+    my $active = 1;
+    return ($total,$free,$used,$active);
+
+    return undef;
+}
+
+sub activate_storage {
+    my ($class, $storeid, $scfg, $cache) = @_;
+    return 1;
+}
+
+sub deactivate_storage {
+    my ($class, $storeid, $scfg, $cache) = @_;
+    return 1;
+}
+
+sub activate_volume {
+    my ($class, $storeid, $scfg, $volname, $exclusive, $cache) = @_;
+    return 1;
+}
+
+sub deactivate_volume {
+    my ($class, $storeid, $scfg, $volname, $exclusive, $cache) = @_;
+    return 1;
+}
+
+
+1;

PVE/Storage/Makefile

@@ -1,4 +1,4 @@
-SOURCES=Plugin.pm DirPlugin.pm LVMPlugin.pm NFSPlugin.pm ISCSIPlugin.pm RBDPlugin.pm SheepdogPlugin.pm
+SOURCES=Plugin.pm DirPlugin.pm LVMPlugin.pm NFSPlugin.pm ISCSIPlugin.pm RBDPlugin.pm SheepdogPlugin.pm ISCSIDirectPlugin.pm
 
 .PHONY: install
 install:

PVE/Storage/Plugin.pm

@@ -300,7 +300,7 @@ sub parse_config {
 	    $d->{content} = $def->{content}->[1] if !$d->{content};
 	}
 
-	if ($type eq 'iscsi' || $type eq 'nfs' || $type eq 'rbd' || $type eq 'sheepdog' ) {
+	if ($type eq 'iscsi' || $type eq 'nfs' || $type eq 'rbd' || $type eq 'sheepdog' || $type eq 'iscsidirect' ) {
 	    $d->{shared} = 1;
 	}
     }