[pve-devel] [RFC v10 qemu-server 5/7] schema: drive: use separate schema when disk allocation is possible

[Fabian Ebner <f.ebner@proxmox.com>]

via the special syntax <storeid>:<size>.

Not worth it by itself, but this is anticipating a new 'import-from'
parameter which is only used upon import/allocation, but shouldn't be
part of the schema for the config or other API enpoints.

Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
---

New in v10.

 PVE/API2/Qemu.pm        | 12 ++++++--
 PVE/QemuServer.pm       |  9 ++++--
 PVE/QemuServer/Drive.pm | 62 +++++++++++++++++++++++++++++------------
 3 files changed, 60 insertions(+), 23 deletions(-)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index 6992f6f..e6a6cdc 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -570,7 +570,9 @@ __PACKAGE__->register_method({
 		    default => 0,
 		    description => "Start VM after it was created successfully.",
 		},
-	    }),
+	    },
+	    1, # with_disk_alloc
+	),
     },
     returns => {
 	type => 'string',
@@ -1545,7 +1547,9 @@ __PACKAGE__->register_method({
 		    maximum => 30,
 		    optional => 1,
 		},
-	    }),
+	    },
+	    1, # with_disk_alloc
+	),
     },
     returns => {
 	type => 'string',
@@ -1593,7 +1597,9 @@ __PACKAGE__->register_method({
 		    maxLength => 40,
 		    optional => 1,
 		},
-	    }),
+	    },
+	    1, # with_disk_alloc
+	),
     },
     returns => { type => 'null' },
     code => sub {
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index c18e1f6..f880f32 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2202,7 +2202,7 @@ sub verify_usb_device {
 
 # add JSON properties for create and set function
 sub json_config_properties {
-    my $prop = shift;
+    my ($prop, $with_disk_alloc) = @_;
 
     my $skip_json_config_opts = {
 	parent => 1,
@@ -2215,7 +2215,12 @@ sub json_config_properties {
 
     foreach my $opt (keys %$confdesc) {
 	next if $skip_json_config_opts->{$opt};
-	$prop->{$opt} = $confdesc->{$opt};
+
+	if ($with_disk_alloc && is_valid_drivename($opt)) {
+	    $prop->{$opt} = $PVE::QemuServer::Drive::drivedesc_hash_with_alloc->{$opt};
+	} else {
+	    $prop->{$opt} = $confdesc->{$opt};
+	}
     }
 
     return $prop;
diff --git a/PVE/QemuServer/Drive.pm b/PVE/QemuServer/Drive.pm
index 7b82fb2..f024269 100644
--- a/PVE/QemuServer/Drive.pm
+++ b/PVE/QemuServer/Drive.pm
@@ -3,6 +3,8 @@ package PVE::QemuServer::Drive;
 use strict;
 use warnings;
 
+use Storable qw(dclone);
+
 use PVE::Storage;
 use PVE::JSONSchema qw(get_standard_option);
 
@@ -33,6 +35,8 @@ our $MAX_SATA_DISKS = 6;
 our $MAX_UNUSED_DISKS = 256;
 
 our $drivedesc_hash;
+# Schema when disk allocation is possible.
+our $drivedesc_hash_with_alloc = {};
 
 my %drivedesc_base = (
     volume => { alias => 'file' },
@@ -262,14 +266,10 @@ my $ide_fmt = {
 };
 PVE::JSONSchema::register_format("pve-qm-ide", $ide_fmt);
 
-my $ALLOCATION_SYNTAX_DESC =
-    "Use the special syntax STORAGE_ID:SIZE_IN_GiB to allocate a new volume.";
-
 my $idedesc = {
     optional => 1,
     type => 'string', format => $ide_fmt,
-    description => "Use volume as IDE hard disk or CD-ROM (n is 0 to " .($MAX_IDE_DISKS -1) . "). " .
-	$ALLOCATION_SYNTAX_DESC,
+    description => "Use volume as IDE hard disk or CD-ROM (n is 0 to " .($MAX_IDE_DISKS - 1) . ").",
 };
 PVE::JSONSchema::register_standard_option("pve-qm-ide", $idedesc);
 
@@ -285,8 +285,7 @@ my $scsi_fmt = {
 my $scsidesc = {
     optional => 1,
     type => 'string', format => $scsi_fmt,
-    description => "Use volume as SCSI hard disk or CD-ROM (n is 0 to " . ($MAX_SCSI_DISKS - 1) . "). " .
-	$ALLOCATION_SYNTAX_DESC,
+    description => "Use volume as SCSI hard disk or CD-ROM (n is 0 to " . ($MAX_SCSI_DISKS - 1) . ").",
 };
 PVE::JSONSchema::register_standard_option("pve-qm-scsi", $scsidesc);
 
@@ -298,8 +297,7 @@ my $sata_fmt = {
 my $satadesc = {
     optional => 1,
     type => 'string', format => $sata_fmt,
-    description => "Use volume as SATA hard disk or CD-ROM (n is 0 to " . ($MAX_SATA_DISKS - 1). "). " .
-	$ALLOCATION_SYNTAX_DESC,
+    description => "Use volume as SATA hard disk or CD-ROM (n is 0 to " . ($MAX_SATA_DISKS - 1). ").",
 };
 PVE::JSONSchema::register_standard_option("pve-qm-sata", $satadesc);
 
@@ -311,8 +309,7 @@ my $virtio_fmt = {
 my $virtiodesc = {
     optional => 1,
     type => 'string', format => $virtio_fmt,
-    description => "Use volume as VIRTIO hard disk (n is 0 to " . ($MAX_VIRTIO_DISKS - 1) . "). " .
-	$ALLOCATION_SYNTAX_DESC,
+    description => "Use volume as VIRTIO hard disk (n is 0 to " . ($MAX_VIRTIO_DISKS - 1) . ").",
 };
 PVE::JSONSchema::register_standard_option("pve-qm-virtio", $virtiodesc);
 
@@ -359,9 +356,7 @@ my $efidisk_fmt = {
 my $efidisk_desc = {
     optional => 1,
     type => 'string', format => $efidisk_fmt,
-    description => "Configure a Disk for storing EFI vars. " .
-	$ALLOCATION_SYNTAX_DESC . " Note that SIZE_IN_GiB is ignored here " .
-	"and that the default EFI vars are copied to the volume instead.",
+    description => "Configure a Disk for storing EFI vars.",
 };
 
 PVE::JSONSchema::register_standard_option("pve-qm-efidisk", $efidisk_desc);
@@ -397,10 +392,7 @@ my $tpmstate_fmt = {
 my $tpmstate_desc = {
     optional => 1,
     type => 'string', format => $tpmstate_fmt,
-    description => "Configure a Disk for storing TPM state. " .
-	$ALLOCATION_SYNTAX_DESC . " Note that SIZE_IN_GiB is ignored here " .
-	"and that the default size of 4 MiB will always be used instead. The " .
-	"format is also fixed to 'raw'.",
+    description => "Configure a Disk for storing TPM state. The format is fixed to 'raw'.",
 };
 use constant TPMSTATE_DISK_SIZE => 4 * 1024 * 1024;
 
@@ -434,27 +426,61 @@ my $unuseddesc = {
     description => "Reference to unused volumes. This is used internally, and should not be modified manually.",
 };
 
+my $with_alloc_desc_cache = {
+    unused => $unuseddesc, # Allocation for unused is not supported currently.
+};
+my $desc_with_alloc = sub {
+    my ($type, $desc) = @_;
+
+    return $with_alloc_desc_cache->{$type} if $with_alloc_desc_cache->{$type};
+
+    my $new_desc = dclone($desc);
+
+    my $extra_note = '';
+    if ($type eq 'efidisk') {
+	$extra_note = " Note that SIZE_IN_GiB is ignored here and that the default EFI vars are ".
+	    "copied to the volume instead.";
+    } elsif ($type eq 'tpmstate') {
+	$extra_note = " Note that SIZE_IN_GiB is ignored here and 4 MiB will be used instead.";
+    }
+
+    $new_desc->{description} .= "Use the special syntax STORAGE_ID:SIZE_IN_GiB to allocate a new ".
+	"volume.${extra_note}";
+
+    $with_alloc_desc_cache->{$type} = $new_desc;
+
+    return $new_desc;
+};
+
 for (my $i = 0; $i < $MAX_IDE_DISKS; $i++)  {
     $drivedesc_hash->{"ide$i"} = $idedesc;
+    $drivedesc_hash_with_alloc->{"ide$i"} = $desc_with_alloc->('ide', $idedesc);
 }
 
 for (my $i = 0; $i < $MAX_SATA_DISKS; $i++)  {
     $drivedesc_hash->{"sata$i"} = $satadesc;
+    $drivedesc_hash_with_alloc->{"sata$i"} = $desc_with_alloc->('sata', $satadesc);
 }
 
 for (my $i = 0; $i < $MAX_SCSI_DISKS; $i++)  {
     $drivedesc_hash->{"scsi$i"} = $scsidesc;
+    $drivedesc_hash_with_alloc->{"scsi$i"} = $desc_with_alloc->('scsi', $scsidesc);
 }
 
 for (my $i = 0; $i < $MAX_VIRTIO_DISKS; $i++)  {
     $drivedesc_hash->{"virtio$i"} = $virtiodesc;
+    $drivedesc_hash_with_alloc->{"virtio$i"} = $desc_with_alloc->('virtio', $virtiodesc);
 }
 
 $drivedesc_hash->{efidisk0} = $efidisk_desc;
+$drivedesc_hash_with_alloc->{efidisk0} = $desc_with_alloc->('efidisk', $efidisk_desc);
+
 $drivedesc_hash->{tpmstate0} = $tpmstate_desc;
+$drivedesc_hash_with_alloc->{tpmstate0} = $desc_with_alloc->('tpmstate', $tpmstate_desc);
 
 for (my $i = 0; $i < $MAX_UNUSED_DISKS; $i++) {
     $drivedesc_hash->{"unused$i"} = $unuseddesc;
+    $drivedesc_hash_with_alloc->{"unused$i"} = $desc_with_alloc->('unused', $unuseddesc);
 }
 
 sub valid_drive_names_for_boot {
-- 
2.30.2