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Laszlo Ersek

2022-Jan-06 14:09 UTC

[Libguestfs] [v2v PATCH 0/9] generate virtio-transitional devices if told so by libosinfo

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325

The first part of the series introduces the "gcaps_virtio_1_0" guest
capability (default value, according to the current virt-v2v assumption:
"true"), and updates the libvirt and JSON outputs to take the new
capability into account.

In the libvirt output, the virtio device models are flipped to -- or are
explicitly introduced as -- virtio-transitional if the machine type is
Q35 and the new "gcaps_virtio_1_0" capability is "false".

In the JSON output, we don't change any device models, only expose the
new capability, and allow CNV / KubeVirt to act upon it. This follows
the spirit of <https://bugzilla.redhat.com/show_bug.cgi?id=1942325#c11>.

The second part of the series wraps the osinfo_os_get_all_devices()
libosinfo API, and introduces a dependent function to retrieve the guest
OS's support for each of the Q35 chipset and the virtio-1.0 protocol
(extrapolated from support for virtio1.0-net), from the osinfo database.

The final patch in the series couples the two previous parts. The Notes
section of this patch contains extensive test results.

Thanks,
Laszlo

Laszlo Ersek (9):
  lib/types: reformat "string_of_guestcaps"
  lib/types: update "string_of_guestcaps"
  lib/types: introduce the "gcaps_virtio_1_0" guest capability
  output/create_libvirt_xml: pick "virtio-transitional" models when
    needed
  output/create_json: expose "gcaps_virtio_1_0"
  convert/libosinfo: wrap osinfo_os_get_all_devices()
  convert/libosinfo_utils: introduce "string_of_osinfo_device_list"
  convert/libosinfo_utils: introduce
"os_support_of_osinfo_device_list"
  convert: determine machine type and virtio-1.0 from osinfo for x86
    guests

 convert/convert_linux.ml       | 50 +++++++++------
 convert/convert_windows.ml     | 31 ++++++---
 convert/libosinfo-c.c          | 66 ++++++++++++++++++++
 convert/libosinfo.ml           | 14 +++++
 convert/libosinfo.mli          | 14 +++++
 convert/libosinfo_utils.ml     | 54 ++++++++++++++++
 convert/libosinfo_utils.mli    | 17 +++++
 lib/types.ml                   | 24 +++++--
 lib/types.mli                  |  4 ++
 output/create_json.ml          |  1 +
 output/create_libvirt_xml.ml   | 28 ++++++---
 tests/test-v2v-cdrom.expected  |  2 +-
 tests/test-v2v-floppy.expected |  2 +-
 tests/test-v2v-i-ova.xml       |  8 +--
 14 files changed, 266 insertions(+), 49 deletions(-)


base-commit: 07b12fe99fb9cf0b75fe45d3eaa07b4bbc1bbe89
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 1/9] lib/types: reformat "string_of_guestcaps"

The printf format string in "string_of_guestcaps" is hard to read,
because
it is not indented properly wrt. the rest of the source code. Indent it
properly without changing its behavior.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 lib/types.ml | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/types.ml b/lib/types.ml
index 894391baecaa..dc3308dc4d87 100644
--- a/lib/types.ml
+++ b/lib/types.ml
@@ -423,12 +423,13 @@ let string_of_machine = function
 
 let string_of_guestcaps gcaps    sprintf "\
-gcaps_block_bus = %s
-gcaps_net_bus = %s
-gcaps_machine = %s
-gcaps_arch = %s
-gcaps_acpi = %b
-" (string_of_block_type gcaps.gcaps_block_bus)
+           gcaps_block_bus = %s\n\
+           gcaps_net_bus = %s\n\
+           gcaps_machine = %s\n\
+           gcaps_arch = %s\n\
+           gcaps_acpi = %b\n\
+          "
+  (string_of_block_type gcaps.gcaps_block_bus)
   (string_of_net_type gcaps.gcaps_net_bus)
   (string_of_machine gcaps.gcaps_machine)
   gcaps.gcaps_arch
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 2/9] lib/types: update "string_of_guestcaps"

The "string_of_guestcaps" function is out of date; the following
commits
did not update it, when they introduced new fields to the "guestcaps"
record type:

- d295d6e510a4 ("v2v: Extend guestcaps to record drivers for virtio-rng,
  balloon and pvpanic.", 2017-04-06)

- 05f780c16f01 ("v2v: support configuration of viosock driver",
  2021-02-26)

Print those fields now.

Fixes: d295d6e510a4fb251d545c52c0a9d6dccabe6f78
Fixes: 05f780c16f0135c657615520c2245b42de1efc3e
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 lib/types.ml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/types.ml b/lib/types.ml
index dc3308dc4d87..52db1f9e05d0 100644
--- a/lib/types.ml
+++ b/lib/types.ml
@@ -425,12 +425,20 @@ let string_of_guestcaps gcaps    sprintf "\
            gcaps_block_bus = %s\n\
            gcaps_net_bus = %s\n\
+           gcaps_virtio_rng = %b\n\
+           gcaps_virtio_balloon = %b\n\
+           gcaps_isa_pvpanic = %b\n\
+           gcaps_virtio_socket = %b\n\
            gcaps_machine = %s\n\
            gcaps_arch = %s\n\
            gcaps_acpi = %b\n\
           "
   (string_of_block_type gcaps.gcaps_block_bus)
   (string_of_net_type gcaps.gcaps_net_bus)
+  gcaps.gcaps_virtio_rng
+  gcaps.gcaps_virtio_balloon
+  gcaps.gcaps_isa_pvpanic
+  gcaps.gcaps_virtio_socket
   (string_of_machine gcaps.gcaps_machine)
   gcaps.gcaps_arch
   gcaps.gcaps_acpi
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 3/9] lib/types: introduce the "gcaps_virtio_1_0" guest capability

Add a new field to the "guestcaps" record to track whether the guest
supports the virtio devices that it does at the virtio-1.0 protocol level.

Virt-v2v's current assumption is that virtio-1.0 is supported by any
guest, namely for those virtio devices specifically that the guest
supports -- which in fact may be the empty set. Make this assumption
explicit by setting the new field to "true" in
"convert/convert_linux.ml"
and "convert/convert_windows.ml".

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 lib/types.mli              | 4 ++++
 convert/convert_linux.ml   | 1 +
 convert/convert_windows.ml | 1 +
 lib/types.ml               | 3 +++
 4 files changed, 9 insertions(+)

diff --git a/lib/types.mli b/lib/types.mli
index 02913c0cb4a1..0b9b6e251585 100644
--- a/lib/types.mli
+++ b/lib/types.mli
@@ -270,6 +270,10 @@ type guestcaps = {
   gcaps_machine : guestcaps_machine; (** Machine model. *)
   gcaps_arch : string;          (** Architecture that KVM must emulate. *)
   gcaps_acpi : bool;            (** True if guest supports acpi. *)
+
+  gcaps_virtio_1_0 : bool;
+  (** The guest supports the virtio devices that it does at the virtio-1.0
+      protocol level. *)
 }
 (** Guest capabilities after conversion.  eg. Was virtio found or installed? *)
 
diff --git a/convert/convert_linux.ml b/convert/convert_linux.ml
index d49ecec03aeb..3f1114ad155d 100644
--- a/convert/convert_linux.ml
+++ b/convert/convert_linux.ml
@@ -155,6 +155,7 @@ let convert (g : G.guestfs) source inspect
keep_serial_console _        gcaps_machine = machine;
       gcaps_arch = Utils.kvm_arch inspect.i_arch;
       gcaps_acpi = acpi;
+      gcaps_virtio_1_0 = true;
     } in
 
     guestcaps
diff --git a/convert/convert_windows.ml b/convert/convert_windows.ml
index 0ebffb156633..30e494ea02cb 100644
--- a/convert/convert_windows.ml
+++ b/convert/convert_windows.ml
@@ -259,6 +259,7 @@ let convert (g : G.guestfs) _ inspect _ static_ips       
gcaps_machine = machine;
       gcaps_arch = Utils.kvm_arch inspect.i_arch;
       gcaps_acpi = true;
+      gcaps_virtio_1_0 = true;
     } in
 
     guestcaps
diff --git a/lib/types.ml b/lib/types.ml
index 52db1f9e05d0..50c41918b686 100644
--- a/lib/types.ml
+++ b/lib/types.ml
@@ -404,6 +404,7 @@ type guestcaps = {
   gcaps_machine : guestcaps_machine;
   gcaps_arch : string;
   gcaps_acpi : bool;
+  gcaps_virtio_1_0 : bool;
 }
 and guestcaps_block_type = Virtio_blk | IDE
 and guestcaps_net_type = Virtio_net | E1000 | RTL8139
@@ -432,6 +433,7 @@ let string_of_guestcaps gcaps             gcaps_machine =
%s\n\
            gcaps_arch = %s\n\
            gcaps_acpi = %b\n\
+           gcaps_virtio_1_0 = %b\n\
           "
   (string_of_block_type gcaps.gcaps_block_bus)
   (string_of_net_type gcaps.gcaps_net_bus)
@@ -442,6 +444,7 @@ let string_of_guestcaps gcaps    (string_of_machine
gcaps.gcaps_machine)
   gcaps.gcaps_arch
   gcaps.gcaps_acpi
+  gcaps.gcaps_virtio_1_0
 
 type target_buses = {
   target_virtio_blk_bus : target_bus_slot array;
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 4/9] output/create_libvirt_xml: pick "virtio-transitional" models when needed

In the domain XML we generate, we do not assign PCI B/D/F addresses to
devices; that job is left to libvirtd. When using the Q35 machine type,
libvirtd places the virtio devices into PCI Express Root Ports. As a
consequence, QEMU disables virtio-0.9.5 support on these devices, and so
guest OSes without virtio-1.0 drivers cannot drive them.

Prevent QEMU from turning off the virtio-0.9.5 ("legacy") protocol by
specifying the "virtio-transitional" (not "virtio") model
for our virtio
devices:

- For non-disk devices, simply change the value of the existent
"model"
  attribute.

- For disk devices, add the "model" attribute as a new one.

(In fact, libvirtd doesn't (only) add the "disable_legacy=off"
QEMU device
property for the "virtio-transitional" devices -- libvirtd even moves
these devices from PCI Express Root Ports to a dedicated
"pcie-to-pci-bridge". This has the same effect on QEMU.)

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---

Notes:
    At this point, this patch is unobservable on the domain XML (by intent).

 output/create_libvirt_xml.ml | 28 +++++++++++++-------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/output/create_libvirt_xml.ml b/output/create_libvirt_xml.ml
index 9413cc0bf884..87bfab178a94 100644
--- a/output/create_libvirt_xml.ml
+++ b/output/create_libvirt_xml.ml
@@ -312,18 +312,26 @@ let create_libvirt_xml ?pool source inspect
   (* The devices. *)
   let devices = ref [] in
 
+  (* This will affect all of the virtio devices (if any). *)
+  let virtio_transitional +    guestcaps.gcaps_machine = Q35 && not
guestcaps.gcaps_virtio_1_0 in
+  let virtio_model +    if virtio_transitional then
"virtio-transitional" else "virtio" in
+
   (* Fixed and removable disks. *)
   let () -    let make_disk bus_name drive_prefix i = function
+    let make_disk bus_name ?(viotrans = false) drive_prefix i = function
     | BusSlotEmpty -> Comment (sprintf "%s slot %d is empty"
bus_name i)
 
     | BusSlotDisk d ->
        let outdisk = outdisk_name d.s_disk_id in
 
-        e "disk" [
-          "type", if pool = None then "file" else
"volume";
-          "device", "disk"
-        ] [
+        e "disk" (
+          [
+            "type", if pool = None then "file" else
"volume";
+            "device", "disk"
+          ] @ if (viotrans) then [ "model",
"virtio-transitional" ] else []
+        ) [
           e "driver" [
             "name", "qemu";
             "type", output_format;
@@ -364,7 +372,7 @@ let create_libvirt_xml ?pool source inspect
     in
 
     List.push_back_list devices
-      (List.mapi (make_disk "virtio" "vd")
+      (List.mapi (make_disk "virtio" ~viotrans:virtio_transitional
"vd")
                  (Array.to_list target_buses.target_virtio_blk_bus));
     let ide_disks        match guestcaps.gcaps_machine with
@@ -392,7 +400,7 @@ let create_libvirt_xml ?pool source inspect
   let nics      let net_model        match guestcaps.gcaps_net_bus with
-      | Virtio_net -> "virtio" | E1000 -> "e1000" |
RTL8139 -> "rtl8139" in
+      | Virtio_net -> virtio_model | E1000 -> "e1000" | RTL8139
-> "rtl8139" in
     List.map (
       fun { s_mac = mac; s_vnet_type = vnet_type; s_vnet = vnet } ->
         let vnet_type_str @@ -483,7 +491,7 @@ let create_libvirt_xml ?pool
source inspect
   (* Miscellaneous KVM devices. *)
   if guestcaps.gcaps_virtio_rng then
     List.push_back devices (
-      e "rng" ["model", "virtio"] [
+      e "rng" ["model", virtio_model] [
         (* XXX Using /dev/urandom requires libvirt >= 1.3.4.  Libvirt
          * was broken before that.
          *)
@@ -496,7 +504,7 @@ let create_libvirt_xml ?pool source inspect
   List.push_back devices (
     e "memballoon"
       ["model",
-       if guestcaps.gcaps_virtio_balloon then "virtio" else
"none"]
+       if guestcaps.gcaps_virtio_balloon then virtio_model else
"none"]
       []
   );
   if guestcaps.gcaps_isa_pvpanic then
@@ -508,7 +516,7 @@ let create_libvirt_xml ?pool source inspect
   List.push_back devices (
     e "viosock"
       ["model",
-        if guestcaps.gcaps_virtio_socket then "virtio" else
"none"]
+        if guestcaps.gcaps_virtio_socket then virtio_model else
"none"]
        []
   );
 
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 5/9] output/create_json: expose "gcaps_virtio_1_0"

Let CNV / KubeVirt know about the "gcaps_virtio_1_0" field as well, so
that it can make the same determination from "machine" and
"gcaps_virtio_1_0" as virt-v2v does in the libvirt output (from an
earlier
patch in this series).

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---

Notes:
    This patch changes the JSON output as follows:
    
    > @@ -45,7 +45,8 @@
    >          "virtio-balloon": true,
    >          "isa-pvpanic": false,
    >          "virtio-socket": false,
    > -        "acpi": true
    > +        "acpi": true,
    > +        "virtio-1-0": true
    >      },
    >      "sound": {
    >          "model": "ich6"

 output/create_json.ml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/output/create_json.ml b/output/create_json.ml
index b48902b7d221..985e10a931c8 100644
--- a/output/create_json.ml
+++ b/output/create_json.ml
@@ -219,6 +219,7 @@ let create_json_metadata source inspect
       "isa-pvpanic", JSON.Bool guestcaps.gcaps_isa_pvpanic;
       "virtio-socket", JSON.Bool guestcaps.gcaps_virtio_socket;
       "acpi", JSON.Bool guestcaps.gcaps_acpi;
+      "virtio-1-0", JSON.Bool guestcaps.gcaps_virtio_1_0;
     ] in
   List.push_back doc ("guestcaps", JSON.Dict guestcaps_dict);
 
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 6/9] convert/libosinfo: wrap osinfo_os_get_all_devices()

Introduce the "osinfo_os.get_devices" OCaml method, for wrapping the
libosinfo API osinfo_os_get_all_devices().

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 convert/libosinfo.mli | 14 +++++
 convert/libosinfo.ml  | 14 +++++
 convert/libosinfo-c.c | 66 ++++++++++++++++++++
 3 files changed, 94 insertions(+)

diff --git a/convert/libosinfo.mli b/convert/libosinfo.mli
index 0428ef911088..1ece7b41a310 100644
--- a/convert/libosinfo.mli
+++ b/convert/libosinfo.mli
@@ -29,11 +29,25 @@ type osinfo_device_driver = {
   files : string list;
 }
 
+type osinfo_device = {
+  id : string;
+  vendor : string;
+  vendor_id : string;
+  product : string;
+  product_id : string;
+  name : string;
+  class_ : string;
+  bus_type : string;
+  subsystem : string;
+}
+
 class osinfo_os : osinfo_os_t -> object
   method get_id : unit -> string
   (** Return the ID. *)
   method get_device_drivers : unit -> osinfo_device_driver list
   (** Return the list of device drivers. *)
+  method get_devices : unit -> osinfo_device list
+  (** Return the list of devices. *)
 end
 (** Minimal OsinfoOs wrapper. *)
 
diff --git a/convert/libosinfo.ml b/convert/libosinfo.ml
index bd9ca126f3c0..78271be248ea 100644
--- a/convert/libosinfo.ml
+++ b/convert/libosinfo.ml
@@ -32,13 +32,27 @@ type osinfo_device_driver = {
   files : string list;
 }
 
+type osinfo_device = {
+  id : string;
+  vendor : string;
+  vendor_id : string;
+  product : string;
+  product_id : string;
+  name : string;
+  class_ : string;
+  bus_type : string;
+  subsystem : string;
+}
+
 external osinfo_os_get_id : osinfo_os_t -> string =
"v2v_osinfo_os_get_id"
 external osinfo_os_get_device_drivers : osinfo_os_t -> osinfo_device_driver
list = "v2v_osinfo_os_get_device_drivers"
+external osinfo_os_get_devices : osinfo_os_t -> osinfo_device list =
"v2v_osinfo_os_get_all_devices"
 
 class osinfo_os h    object (self)
     method get_id () = osinfo_os_get_id h
     method get_device_drivers () = osinfo_os_get_device_drivers h
+    method get_devices () = osinfo_os_get_devices h
 end
 
 external osinfo_db_load : unit -> osinfo_db_t =
"v2v_osinfo_db_load"
diff --git a/convert/libosinfo-c.c b/convert/libosinfo-c.c
index 09cf588d1c10..7a8e287aeb26 100644
--- a/convert/libosinfo-c.c
+++ b/convert/libosinfo-c.c
@@ -50,6 +50,7 @@
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(OsinfoFilter, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(OsinfoLoader, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(OsinfoOsList, g_object_unref)
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(OsinfoDeviceList, g_object_unref)
 #endif
 
 typedef OsinfoDb *OsinfoDb_t;
@@ -255,3 +256,68 @@ v2v_osinfo_os_get_device_drivers (value osv)
 
   CAMLreturn (rv);
 }
+
+/* Collect OsinfoDevice properties from two levels:
+ *
+ * - The OSINFO_ENTITY_PROP_ID property, originating from the OsinfoEntity base
+ *   class. This is a unique URI, identifying the device.
+ *
+ * - All currently known OSINFO_DEVICE_PROP_* properties, originating from the
+ *   OsinfoDevice class.
+ *
+ * All of the above properties have string values. Thus, for uniformity, access
+ * all these properties by their names at the OsinfoEntity level (i.e., forego
+ * the class- and property-specific, dedicated property getter functions).
+ */
+static const char * const device_prop[] = {
+  OSINFO_ENTITY_PROP_ID,
+  OSINFO_DEVICE_PROP_VENDOR,
+  OSINFO_DEVICE_PROP_VENDOR_ID,
+  OSINFO_DEVICE_PROP_PRODUCT,
+  OSINFO_DEVICE_PROP_PRODUCT_ID,
+  OSINFO_DEVICE_PROP_NAME,
+  OSINFO_DEVICE_PROP_CLASS,
+  OSINFO_DEVICE_PROP_BUS_TYPE,
+  OSINFO_DEVICE_PROP_SUBSYSTEM,
+};
+#define NUM_DEVICE_PROPS (sizeof device_prop / sizeof device_prop[0])
+
+value
+v2v_osinfo_os_get_all_devices (value osv)
+{
+  CAMLparam1 (osv);
+  CAMLlocal3 (retval, link, props);
+  g_autoptr (OsinfoDeviceList) dev_list = NULL;
+  OsinfoList *ent_list;
+  gint ent_nr;
+
+  retval = Val_emptylist;
+  dev_list = osinfo_os_get_all_devices (OsinfoOs_t_val (osv), NULL);
+  ent_list = OSINFO_LIST (dev_list);
+  ent_nr = osinfo_list_get_length (ent_list);
+
+  while (ent_nr > 0) {
+    OsinfoEntity *ent;
+    size_t prop_nr;
+
+    --ent_nr;
+    ent = osinfo_list_get_nth (ent_list, ent_nr);
+
+    props = caml_alloc (NUM_DEVICE_PROPS, 0);
+    for (prop_nr = 0; prop_nr < NUM_DEVICE_PROPS; ++prop_nr) {
+      const gchar *prop_val;
+
+      prop_val = osinfo_entity_get_param_value (ent, device_prop[prop_nr]);
+      if (prop_val == NULL)
+        prop_val = "";
+      Store_field (props, prop_nr, caml_copy_string (prop_val));
+    }
+
+    link = caml_alloc (2, 0);
+    Store_field (link, 0, props);
+    Store_field (link, 1, retval);
+    retval = link;
+  }
+
+  CAMLreturn (retval);
+}
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 7/9] convert/libosinfo_utils: introduce "string_of_osinfo_device_list"

For debugging purposes, we'll want to print the list of devices returned
by the previously introduced "osinfo_os#get_devices" method.

Format the device list as a nice table.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---

Notes:
    Log examples will be shown later in this series, in the Notes section(s)
    of other patch(es).

 convert/libosinfo_utils.mli |  3 ++
 convert/libosinfo_utils.ml  | 35 ++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/convert/libosinfo_utils.mli b/convert/libosinfo_utils.mli
index b3714d224ae4..5a703334d9f0 100644
--- a/convert/libosinfo_utils.mli
+++ b/convert/libosinfo_utils.mli
@@ -27,3 +27,6 @@ val get_os_by_short_id : string -> Libosinfo.osinfo_os
 
 val string_of_osinfo_device_driver : Libosinfo.osinfo_device_driver ->
string
 (** Convert a [osinfo_device_driver] to a printable string for debugging. *)
+
+val string_of_osinfo_device_list : Libosinfo.osinfo_device list -> string
+(** Convert an [osinfo_device] list to a printable string for debugging. *)
diff --git a/convert/libosinfo_utils.ml b/convert/libosinfo_utils.ml
index 1fc138cce321..d5eb082b458c 100644
--- a/convert/libosinfo_utils.ml
+++ b/convert/libosinfo_utils.ml
@@ -42,3 +42,38 @@ let string_of_osinfo_device_driver { Libosinfo.architecture;
location;
     (if signed then "signed" else "unsigned")
     priority
     (String.concat " " files)
+
+let string_of_osinfo_device_list dev_list +
+  (* Turn the fields of an "osinfo_device" record into a list. *)
+  let listify { Libosinfo.id; vendor; vendor_id; product; product_id; name;
+                class_; bus_type; subsystem } +    [ id; vendor; vendor_id;
product; product_id; name;
+      class_; bus_type; subsystem ]
+
+  (* Given a list of strings, and a list of previously known maximum widths,
+   * "increase" each width, if necessary, to the length of the
corresponding
+   * string.
+   *)
+  and grow_widths = List.map2 (fun s -> max (String.length s))
+  in
+
+  (* Compute the maximum width for each field in "dev_list". *)
+  let max_widths +    List.fold_right grow_widths (List.map listify dev_list)
+      [ 0; 0; 0; 0; 0; 0; 0; 0; 0 ]
+
+  (* Given a list of strings and a list of field widths, format "string1 |
+   * string2 | ... | stringN" such that each field is right-padded to the
+   * corresponding width.
+   *)
+  and columnate strings widths +    String.concat " | " (List.map2
(Printf.sprintf "%-*s") widths strings)
+  in
+
+  (* Format "dev_list" as a table by (a) printing one
"osinfo_device" record
+   * per line, and (b) right-padding each field of each
"osinfo_device" record
+   * to the maximum width of that field.
+   *)
+  String.concat "\n"
+    (List.map (fun dev -> columnate (listify dev) max_widths) dev_list)
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 8/9] convert/libosinfo_utils: introduce "os_support_of_osinfo_device_list"

Add a helper function for calculating q35 support and virtio-1.0 support
from the list of devices returned by the previously introduced
"osinfo_os#get_devices" method.

(Rather than folding the list into a record of bools, implement the
function explicitly, recursively. Folding wouldn't stop (without abusing
exceptions) once all fields in the record turned "true", but a
recursive
function can just return the accumulator at that point.)

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 convert/libosinfo_utils.mli | 14 ++++++++++++++
 convert/libosinfo_utils.ml  | 19 +++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/convert/libosinfo_utils.mli b/convert/libosinfo_utils.mli
index 5a703334d9f0..ab77ec97df30 100644
--- a/convert/libosinfo_utils.mli
+++ b/convert/libosinfo_utils.mli
@@ -30,3 +30,17 @@ val string_of_osinfo_device_driver :
Libosinfo.osinfo_device_driver -> string
 
 val string_of_osinfo_device_list : Libosinfo.osinfo_device list -> string
 (** Convert an [osinfo_device] list to a printable string for debugging. *)
+
+type os_support = {
+  q35 : bool;
+  vio10 : bool;
+}
+(** Tell whether the operating system supports the Q35 board type and/or
+    non-transitional (virtio-1.0-only) virtio devices. (Internally, the
+    virtio-1.0-net device is used as a proxy for the general statement about
+    virtio-1.0.)
+ *)
+
+val os_support_of_osinfo_device_list : Libosinfo.osinfo_device list ->
+                                       os_support
+(** Get [os_support] from an [osinfo_device] list. *)
diff --git a/convert/libosinfo_utils.ml b/convert/libosinfo_utils.ml
index d5eb082b458c..b2ed31ab5c42 100644
--- a/convert/libosinfo_utils.ml
+++ b/convert/libosinfo_utils.ml
@@ -77,3 +77,22 @@ let string_of_osinfo_device_list dev_list     *)
   String.concat "\n"
     (List.map (fun dev -> columnate (listify dev) max_widths) dev_list)
+
+type os_support = {
+  q35 : bool;
+  vio10 : bool;
+}
+
+let os_support_of_osinfo_device_list +  let rec next accu left +    match accu,
left with
+    | { q35 = true; vio10 = true }, _
+    | _ , [] ->
+      accu
+    | { q35; vio10 }, { Libosinfo.id } :: tail ->
+      let q35 = q35 || id = "http://qemu.org/chipset/x86/q35"
+      and vio10 = vio10 || id = "http://pcisig.com/pci/1af4/1041"
+      in
+      next { q35; vio10 } tail
+  in
+  next { q35 = false; vio10 = false }
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-06 14:09 UTC

head link

[Libguestfs] [v2v PATCH 9/9] convert: determine machine type and virtio-1.0 from osinfo for x86 guests

Determine the machine type and virtio-1.0 support from osinfo, for x86
guests. This connects the previous two parts of this series.

Keep the original logic from commit ac39fa292c31 ("v2v: Set machine type
explicitly for outputs which support it (RHBZ#1581428).", 2020-12-04) for
non-x86 guests, and for the case when libosinfo does not recognize the
guest OS.

Update the "cdrom", "floppy", and "i-ova" test
cases, which all use a
(phony) Windows 7 image -- Windows 7 does not support virtio-1.0-only
devices, according to libosinfo.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---

Notes:
    (1) The patch duplicates the following control structure between
        "convert_linux.ml" and "convert_windows.ml":
    
          arch: i386 or x86_64
            grab OS device list from libosinfo
            success:
              debug-log device list
              determine machine type (q35 vs. i440fx) from device list
              determine virtio-1.0 support from device list
            not found:
              FALL BACK TO PRE-EXISTENT LOGIC
              assume "virtio-1.0: yes"
          arch: something else
            machine type: pick Virt
            assume "virtio-1.0: yes"
    
        All of this could be factored out to another helper function (the
        only difference between the Linux and Windows conversion is the
        "PRE-EXISTENT LOGIC").
    
        However, I couldn't find a good spot for this.
"lib/utils.mli" is
        too low-level, I think, whereas "convert/libosinfo_utils.mli"
is not
        appropriate: the control structure above does not use libosinfo at
        all if the architecture differs from x86.
    
    (2) When converting a RHEL-5.11 guest, the log contains the following:
    
    > libosinfo: loaded OS: http://redhat.com/rhel/5.11
    > libosinfo devices for OS "rhel5.11":
    > http://pcisig.com/pci/8086/2668 | Intel Corporation | 8086 |
82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller | 2668 |
ich6         | audio | pci |
    > http://pcisig.com/pci/1af4/1001 | Red Hat, Inc.     | 1af4 | Virtio
block device                                                  | 1001 |
virtio-block | block | pci |
    > http://pcisig.com/pci/1af4/1000 | Red Hat, Inc.     | 1af4 | Virtio
network device                                                | 1000 |
virtio-net   | net   | pci |
    > gcaps_block_bus = virtio-blk
    > gcaps_net_bus = virtio-net
    > gcaps_virtio_rng = false
    > gcaps_virtio_balloon = true
    > gcaps_isa_pvpanic = false
    > gcaps_virtio_socket = false
    > gcaps_machine = i440fx
    > gcaps_arch = x86_64
    > gcaps_acpi = true
    > gcaps_virtio_1_0 = false
    
    Note that the device list does *not* contain the Q35 chipset, therefore
    we can expect the machine type to flip from Q35 to I440FX, rather than
    just the virtio model flipping from virtio to virtio-transitional.
    
    (2.1) Accordingly, the JSON output changes as follows:
    
    > @@ -11,7 +11,7 @@
    >          "apic",
    >          "vmport"
    >      ],
    > -    "machine": "q35",
    > +    "machine": "pc",
    >      "disks": [
    >          {
    >              "dev": "vda",
    > @@ -39,14 +39,14 @@
    >          "block-bus": "virtio-blk",
    >          "net-bus": "virtio-net",
    >          "video": "vga",
    > -        "machine": "q35",
    > +        "machine": "i440fx",
    >          "arch": "x86_64",
    >          "virtio-rng": false,
    >          "virtio-balloon": true,
    >          "isa-pvpanic": false,
    >          "virtio-socket": false,
    >          "acpi": true,
    > -        "virtio-1-0": true
    > +        "virtio-1-0": false
    >      },
    >      "sound": {
    >          "model": "ich6"
    
    (2.2) The generated domain XML changes as follows:
    
    > @@ -15,7 +15,7 @@
    >      <apic/>
    >    </features>
    >    <os>
    > -    <type arch='x86_64'
machine='q35'>hvm</type>
    > +    <type arch='x86_64'
machine='pc'>hvm</type>
    >    </os>
    >    <on_poweroff>destroy</on_poweroff>
    >    <on_reboot>restart</on_reboot>
    > @@ -28,7 +28,7 @@
    >      </disk>
    >      <disk device='cdrom' type='file'>
    >        <driver name='qemu' type='raw'/>
    > -      <target dev='sda' bus='sata'/>
    > +      <target dev='hda' bus='ide'/>
    >      </disk>
    >      <interface type='bridge'>
    >        <source bridge='virbr0'/>
    
    (2.3) The domain XML, completed by libvirtd, changes as follows:
    
    > @@ -10,7 +10,7 @@
    >    <currentMemory
unit='KiB'>1048576</currentMemory>
    >    <vcpu placement='static'>1</vcpu>
    >    <os>
    > -    <type arch='x86_64'
machine='pc-q35-6.1'>hvm</type>
    > +    <type arch='x86_64'
machine='pc-i440fx-6.1'>hvm</type>
    >      <boot dev='hd'/>
    >    </os>
    >    <features>
    > @@ -30,60 +30,26 @@
    >        <driver name='qemu' type='raw'/>
    >        <source pool='default'
volume='converted-sda'/>
    >        <target dev='vda' bus='virtio'/>
    > -      <address type='pci' domain='0x0000'
bus='0x05' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x05' function='0x0'/>
    >      </disk>
    >      <disk type='file' device='cdrom'>
    >        <driver name='qemu' type='raw'/>
    > -      <target dev='sda' bus='sata'/>
    > +      <target dev='hda' bus='ide'/>
    >        <readonly/>
    >        <address type='drive' controller='0'
bus='0' target='0' unit='0'/>
    >      </disk>
    > -    <controller type='usb' index='0'
model='qemu-xhci'>
    > -      <address type='pci' domain='0x0000'
bus='0x04' slot='0x00' function='0x0'/>
    > +    <controller type='usb' index='0'
model='piix3-uhci'>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x01' function='0x2'/>
    >      </controller>
    > -    <controller type='sata' index='0'>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x1f' function='0x2'/>
    > -    </controller>
    > -    <controller type='pci' index='0'
model='pcie-root'/>
    > -    <controller type='pci' index='1'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='1' port='0x10'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x0'
multifunction='on'/>
    > -    </controller>
    > -    <controller type='pci' index='2'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='2' port='0x11'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x1'/>
    > -    </controller>
    > -    <controller type='pci' index='3'
model='pcie-to-pci-bridge'>
    > -      <model name='pcie-pci-bridge'/>
    > -      <address type='pci' domain='0x0000'
bus='0x01' slot='0x00' function='0x0'/>
    > -    </controller>
    > -    <controller type='pci' index='4'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='4' port='0x12'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x2'/>
    > -    </controller>
    > -    <controller type='pci' index='5'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='5' port='0x13'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x3'/>
    > -    </controller>
    > -    <controller type='pci' index='6'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='6' port='0x14'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x4'/>
    > -    </controller>
    > -    <controller type='pci' index='7'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='7' port='0x15'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x5'/>
    > +    <controller type='pci' index='0'
model='pci-root'/>
    > +    <controller type='ide' index='0'>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x01' function='0x1'/>
    >      </controller>
    >      <interface type='bridge'>
    >        <mac address='52:54:00:6c:97:64'/>
    >        <source bridge='virbr0'/>
    >        <model type='virtio'/>
    > -      <address type='pci' domain='0x0000'
bus='0x02' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x03' function='0x0'/>
    >      </interface>
    >      <serial type='pty'>
    >        <target type='isa-serial' port='0'>
    > @@ -102,15 +68,15 @@
    >        <listen type='address'/>
    >      </graphics>
    >      <sound model='ich6'>
    > -      <address type='pci' domain='0x0000'
bus='0x03' slot='0x01' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x04' function='0x0'/>
    >      </sound>
    >      <audio id='1' type='spice'/>
    >      <video>
    >        <model type='vga' vram='16384'
heads='1' primary='yes'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x01' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x0'/>
    >      </video>
    >      <memballoon model='virtio'>
    > -      <address type='pci' domain='0x0000'
bus='0x06' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x06' function='0x0'/>
    >      </memballoon>
    >    </devices>
    >  </domain>
    
    (2.4) The converted RHEL-5.11 guest actually boots.
    
    (3) When converting a RHEL-6.10 guest, the log contains:
    
    > libosinfo: loaded OS: http://redhat.com/rhel/6.10
    > libosinfo devices for OS "rhel6.10":
    > http://pcisig.com/pci/8086/2668 | Intel Corporation | 8086 |
82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller | 2668 |
ich6           | audio   | pci |
    > http://usb.org/usb/80ee/0021    | VirtualBox        | 80ee | USB Tablet
| 0021 | tablet         | input   | usb |
    > http://pcisig.com/pci/1af4/1003 | Red Hat, Inc.     | 1af4 | Virtio
console                                                       | 1003 |
virtio-console | console | pci |
    > http://pcisig.com/pci/8086/293e | Intel Corporation | 8086 | 82801I
(ICH9 Family) HD Audio Controller                             | 293e | ich9-hda 
| audio   | pci |
    > http://qemu.org/chipset/x86/q35 |                   |      |           
|      | qemu-x86-q35   | chipset |     |
    > http://pcisig.com/pci/1af4/1000 | Red Hat, Inc.     | 1af4 | Virtio
network device                                                | 1000 |
virtio-net     | net     | pci |
    > http://pcisig.com/pci/8086/10d3 | Intel Corporation | 8086 | 82574L
Gigabit Network Connection                                    | 10d3 | e1000e   
| net     | pci |
    > http://pcisig.com/pci/1af4/1001 | Red Hat, Inc.     | 1af4 | Virtio
block device                                                  | 1001 |
virtio-block   | block   | pci |
    > gcaps_block_bus = virtio-blk
    > gcaps_net_bus = virtio-net
    > gcaps_virtio_rng = true
    > gcaps_virtio_balloon = true
    > gcaps_isa_pvpanic = true
    > gcaps_virtio_socket = false
    > gcaps_machine = q35
    > gcaps_arch = x86_64
    > gcaps_acpi = true
    > gcaps_virtio_1_0 = false
    
    Refer to osinfo-db commit ae0add4d1b0f ("os: Add q35/ich9/e1000e to
    rhel6", 2018-10-11):
    
    https://gitlab.com/libosinfo/osinfo-db/-/commit/ae0add4d1b0f
    
    (3.1) The JSON output changes as follows (note the machine type in the
    context):
    
    > @@ -42,15 +42,15 @@
    >          "machine": "q35",
    >          "arch": "x86_64",
    >          "virtio-rng": true,
    >          "virtio-balloon": true,
    >          "isa-pvpanic": true,
    >          "virtio-socket": false,
    >          "acpi": true,
    > -        "virtio-1-0": true
    > +        "virtio-1-0": false
    >      },
    >      "sound": {
    >          "model": "ich6"
    >      },
    >      "display": {
    >          "type": "spice"
    >      },
    
    (3.2) The generated domain XML changes like this (note the machine type
    in the context):
    
    > @@ -18,35 +18,35 @@
    >      <type arch='x86_64'
machine='q35'>hvm</type>
    >    </os>
    >    <on_poweroff>destroy</on_poweroff>
    >    <on_reboot>restart</on_reboot>
    >    <on_crash>restart</on_crash>
    >    <devices>
    > -    <disk type='volume' device='disk'>
    > +    <disk type='volume' device='disk'
model='virtio-transitional'>
    >        <driver name='qemu' type='raw'/>
    >        <source pool='default'
volume='converted-sda'/>
    >        <target dev='vda' bus='virtio'/>
    >      </disk>
    >      <disk device='cdrom' type='file'>
    >        <driver name='qemu' type='raw'/>
    >        <target dev='sda' bus='sata'/>
    >      </disk>
    >      <interface type='bridge'>
    >        <source bridge='virbr0'/>
    > -      <model type='virtio'/>
    > +      <model type='virtio-transitional'/>
    >        <mac address='52:54:00:3f:89:f8'/>
    >      </interface>
    >      <video>
    >        <model type='vga' vram='16384'
heads='1'/>
    >      </video>
    >      <graphics type='spice' autoport='yes'
port='-1'/>
    >      <sound model='ich6'/>
    > -    <rng model='virtio'>
    > +    <rng model='virtio-transitional'>
    >        <backend
model='random'>/dev/urandom</backend>
    >      </rng>
    > -    <memballoon model='virtio'/>
    > +    <memballoon model='virtio-transitional'/>
    >      <panic model='isa'>
    >        <address type='isa' iobase='0x505'/>
    >      </panic>
    >      <viosock model='none'/>
    >      <input type='tablet' bus='usb'/>
    >      <input type='mouse' bus='ps2'/>
    
    (3.3) The domain XML, completed by libvirtd, changes as follows:
    
    > @@ -26,11 +26,11 @@
    >    <on_crash>restart</on_crash>
    >    <devices>
    >      <emulator>/usr/bin/qemu-system-x86_64</emulator>
    > -    <disk type='volume' device='disk'>
    > +    <disk type='volume' device='disk'
model='virtio-transitional'>
    >        <driver name='qemu' type='raw'/>
    >        <source pool='default'
volume='converted-sda'/>
    >        <target dev='vda' bus='virtio'/>
    > -      <address type='pci' domain='0x0000'
bus='0x05' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x02' slot='0x03' function='0x0'/>
    >      </disk>
    >      <disk type='file' device='cdrom'>
    >        <driver name='qemu' type='raw'/>
    > @@ -39,7 +39,7 @@
    >        <address type='drive' controller='0'
bus='0' target='0' unit='0'/>
    >      </disk>
    >      <controller type='usb' index='0'
model='qemu-xhci'>
    > -      <address type='pci' domain='0x0000'
bus='0x04' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x03' slot='0x00' function='0x0'/>
    >      </controller>
    >      <controller type='sata' index='0'>
    >        <address type='pci' domain='0x0000'
bus='0x00' slot='0x1f' function='0x2'/>
    > @@ -50,45 +50,25 @@
    >        <target chassis='1' port='0x10'/>
    >        <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x0'
multifunction='on'/>
    >      </controller>
    > -    <controller type='pci' index='2'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='2' port='0x11'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x1'/>
    > -    </controller>
    > -    <controller type='pci' index='3'
model='pcie-to-pci-bridge'>
    > +    <controller type='pci' index='2'
model='pcie-to-pci-bridge'>
    >        <model name='pcie-pci-bridge'/>
    >        <address type='pci' domain='0x0000'
bus='0x01' slot='0x00' function='0x0'/>
    >      </controller>
    > +    <controller type='pci' index='3'
model='pcie-root-port'>
    > +      <model name='pcie-root-port'/>
    > +      <target chassis='3' port='0x11'/>
    > +      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x1'/>
    > +    </controller>
    >      <controller type='pci' index='4'
model='pcie-root-port'>
    >        <model name='pcie-root-port'/>
    >        <target chassis='4' port='0x12'/>
    >        <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x2'/>
    >      </controller>
    > -    <controller type='pci' index='5'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='5' port='0x13'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x3'/>
    > -    </controller>
    > -    <controller type='pci' index='6'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='6' port='0x14'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x4'/>
    > -    </controller>
    > -    <controller type='pci' index='7'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='7' port='0x15'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x5'/>
    > -    </controller>
    > -    <controller type='pci' index='8'
model='pcie-root-port'>
    > -      <model name='pcie-root-port'/>
    > -      <target chassis='8' port='0x16'/>
    > -      <address type='pci' domain='0x0000'
bus='0x00' slot='0x02' function='0x6'/>
    > -    </controller>
    >      <interface type='bridge'>
    >        <mac address='52:54:00:3f:89:f8'/>
    >        <source bridge='virbr0'/>
    > -      <model type='virtio'/>
    > -      <address type='pci' domain='0x0000'
bus='0x02' slot='0x00' function='0x0'/>
    > +      <model type='virtio-transitional'/>
    > +      <address type='pci' domain='0x0000'
bus='0x02' slot='0x01' function='0x0'/>
    >      </interface>
    >      <serial type='pty'>
    >        <target type='isa-serial' port='0'>
    > @@ -107,19 +87,19 @@
    >        <listen type='address'/>
    >      </graphics>
    >      <sound model='ich6'>
    > -      <address type='pci' domain='0x0000'
bus='0x03' slot='0x01' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x02' slot='0x02' function='0x0'/>
    >      </sound>
    >      <audio id='1' type='spice'/>
    >      <video>
    >        <model type='vga' vram='16384'
heads='1' primary='yes'/>
    >        <address type='pci' domain='0x0000'
bus='0x00' slot='0x01' function='0x0'/>
    >      </video>
    > -    <memballoon model='virtio'>
    > -      <address type='pci' domain='0x0000'
bus='0x06' slot='0x00' function='0x0'/>
    > +    <memballoon model='virtio-transitional'>
    > +      <address type='pci' domain='0x0000'
bus='0x02' slot='0x04' function='0x0'/>
    >      </memballoon>
    > -    <rng model='virtio'>
    > +    <rng model='virtio-transitional'>
    >        <backend
model='random'>/dev/urandom</backend>
    > -      <address type='pci' domain='0x0000'
bus='0x07' slot='0x00' function='0x0'/>
    > +      <address type='pci' domain='0x0000'
bus='0x02' slot='0x05' function='0x0'/>
    >      </rng>
    >      <panic model='isa'>
    >        <address type='isa' iobase='0x505'/>
    
    Which can be summarized like below:
    
    - The model of all four virtio devices has changed from virtio to
      virtio-transitional (the fifth device, virtio-socket, is not supported
      at all).
    
    - The PCIe root ports providing bus numbers 2, 5, 6, 7, originally
      hosting the virtio devices, have been removed. The virtio devices have
      been moved to slots of "pcie-to-pci-bridge".
    
    - The (empty) PCIe root port providing bus number 8, has been removed.
      (This likely used to exist for hotplug purposes.)
    
    - "pcie-to-pci-bridge" now provides bus number 2, not 3.
    
    - The qemu-xhci device has been moved from the PCIe root port providing
      bus number 4 to a brand new port, providing bus number 3. The port
      providing bus number 4 is now empty (likely preserved for hotplug
      purposes).
    
    - The ich6 device has been kept on "pcie-to-pci-bridge", just
relocated
      to a different slot.
    
    (3.4) The converted RHEL-6.10 guest actually boots.
    
    (4) When converting a RHEL-7.9 guest, the log contains:
    
    > libosinfo: loaded OS: http://redhat.com/rhel/7.9
    > libosinfo devices for OS "rhel7.9":
    > http://pcisig.com/pci/1af4/1041 | Red Hat, Inc.     | 1af4 | Virtio
network device                                                | 1041 |
virtio1.0-net     | net            | pci |
    > http://pcisig.com/pci/8086/293e | Intel Corporation | 8086 | 82801I
(ICH9 Family) HD Audio Controller                             | 293e | ich9-hda 
| audio          | pci |
    > http://pcisig.com/pci/1033/0194 | NEC Corporation   | 1033 | uPD720200
USB 3.0 Host Controller                                    | 0194 | nec-xhci    
| controller.usb | pci |
    > http://pcisig.com/pci/1b36/0100 | Red Hat, Inc.     | 1b36 | QXL
paravirtual graphic card                                         | 0100 | qxl   
| video          | pci |
    > http://pcisig.com/pci/8086/2668 | Intel Corporation | 8086 |
82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller | 2668 |
ich6              | audio          | pci |
    > http://pcisig.com/pci/1af4/1003 | Red Hat, Inc.     | 1af4 | Virtio
console                                                       | 1003 |
virtio-console    | console        | pci |
    > http://pcisig.com/pci/1af4/1049 | Red Hat, Inc.     | 1af4 | Virtio
filesystem                                                    | 1049 |
virtio1.0-9p      | filesystem     | pci |
    > http://pcisig.com/pci/1af4/1000 | Red Hat, Inc.     | 1af4 | Virtio
network device                                                | 1000 |
virtio-net        | net            | pci |
    > http://pcisig.com/pci/1af4/1043 | Red Hat, Inc.     | 1af4 | Virtio
console                                                       | 1043 |
virtio1.0-console | console        | pci |
    > http://qemu.org/chipset/x86/q35 |                   |      |           
|      | qemu-x86-q35      | chipset        |     |
    > http://usb.org/usb/80ee/0021    | VirtualBox        | 80ee | USB Tablet
| 0021 | tablet            | input          | usb |
    > http://pcisig.com/pci/1af4/1005 | Red Hat, Inc.     | 1af4 | Virtio RNG
| 1005 | virtio-rng        | rng            | pci |
    > http://pcisig.com/pci/8086/10d3 | Intel Corporation | 8086 | 82574L
Gigabit Network Connection                                    | 10d3 | e1000e   
| net            | pci |
    > http://pcisig.com/pci/1af4/1048 | Red Hat, Inc.     | 1af4 | Virtio
SCSI                                                          | 1048 |
virtio1.0-scsi    | block          | pci |
    > http://pcisig.com/pci/8086/2415 | Intel Corporation | 8086 | 82801AA
AC'97 Audio Controller                                       | 2415 | ac97  
| audio          | pci |
    > http://pcisig.com/pci/1af4/1045 | Red Hat, Inc.     | 1af4 | Virtio
memory balloon                                                | 1045 |
virtio1.0-balloon | memory.balloon | pci |
    > http://pcisig.com/pci/1af4/1042 | Red Hat, Inc.     | 1af4 | Virtio
block device                                                  | 1042 |
virtio1.0-block   | block          | pci |
    > http://pcisig.com/pci/1b36/0004 | Red Hat, Inc.     | 1b36 | QEMU PCI
Quad-port 16550A Adapter                                    | 0004 | qemu-xhci  
| controller.usb | pci |
    > http://pcisig.com/pci/1af4/1001 | Red Hat, Inc.     | 1af4 | Virtio
block device                                                  | 1001 |
virtio-block      | block          | pci |
    > http://pcisig.com/pci/1af4/1052 | Red Hat, Inc.     | 1af4 | Virtio
input                                                         | 1052 |
virtio1.0-input   | input          | pci |
    > http://pcisig.com/pci/1af4/1044 | Red Hat, Inc.     | 1af4 | Virtio RNG
| 1044 | virtio1.0-rng     | rng            | pci |
    > gcaps_block_bus = virtio-blk
    > gcaps_net_bus = virtio-net
    > gcaps_virtio_rng = true
    > gcaps_virtio_balloon = true
    > gcaps_isa_pvpanic = true
    > gcaps_virtio_socket = false
    > gcaps_machine = q35
    > gcaps_arch = x86_64
    > gcaps_acpi = true
    > gcaps_virtio_1_0 = true
    
    Note the presence of both "qemu-x86-q35"
    ("http://qemu.org/chipset/x86/q35") and "virtio1.0-net"
    ("http://pcisig.com/pci/1af4/1041").
    
    (4.1) None of the JSON output, the generated libvirt XML, and the
    completed (imported by libvirtd) domain XML change.
    
    (4.2) The converted RHEL-7.9 guest continues booting.

 convert/convert_linux.ml       | 51 ++++++++++++--------
 convert/convert_windows.ml     | 32 ++++++++----
 tests/test-v2v-cdrom.expected  |  2 +-
 tests/test-v2v-floppy.expected |  2 +-
 tests/test-v2v-i-ova.xml       |  8 +--
 5 files changed, 60 insertions(+), 35 deletions(-)

diff --git a/convert/convert_linux.ml b/convert/convert_linux.ml
index 3f1114ad155d..45ce069ad9bf 100644
--- a/convert/convert_linux.ml
+++ b/convert/convert_linux.ml
@@ -123,26 +123,39 @@ let convert (g : G.guestfs) source inspect
keep_serial_console _
     SELinux_relabel.relabel g;
 
-    (* Pivot on the year 2007.  Any Linux distro from earlier than
-     * 2007 should use i440fx, anything 2007 or newer should use q35.
-     * XXX Look up this information in libosinfo in future.
-     *)
-    let machine -      match inspect.i_arch, inspect.i_distro,
inspect.i_major_version with
-      | ("i386"|"x86_64"), "fedora", _ -> Q35
-      | ("i386"|"x86_64"),
("rhel"|"centos"|"scientificlinux"|
-                            "redhat-based"|"oraclelinux"),
major ->
-         if major <= 4 then I440FX else Q35
-      | ("i386"|"x86_64"),
("sles"|"suse-based"|"opensuse"), major ->
-         if major < 10 then I440FX else Q35
-      | ("i386"|"x86_64"),
("debian"|"ubuntu"|"linuxmint"|
-                            "kalilinux"), major ->
-         if major < 4 then I440FX else Q35
+    let machine, virtio_1_0 +      match inspect.i_arch with
+      | ("i386"|"x86_64") ->
+        (try
+           let os = Libosinfo_utils.get_os_by_short_id inspect.i_osinfo in
+           let devices = os#get_devices () in
+           debug "libosinfo devices for OS \"%s\":\n%s"
inspect.i_osinfo
+             (Libosinfo_utils.string_of_osinfo_device_list devices);
+           let { Libosinfo_utils.q35; vio10 } +            
Libosinfo_utils.os_support_of_osinfo_device_list devices in
+           (if q35 then Q35 else I440FX), vio10
+         with
+         | Not_found ->
+           (* Pivot on the year 2007.  Any Linux distro from earlier than 2007
+            * should use i440fx, anything 2007 or newer should use q35.
+            *)
+           (match inspect.i_distro, inspect.i_major_version with
+            | "fedora", _ -> Q35
+            |
("rhel"|"centos"|"scientificlinux"|"redhat-based"|"oraclelinux"),
+              major ->
+              if major <= 4 then I440FX else Q35
+            | ("sles"|"suse-based"|"opensuse"),
major ->
+              if major < 10 then I440FX else Q35
+            |
("debian"|"ubuntu"|"linuxmint"|"kalilinux"),
major ->
+              if major < 4 then I440FX else Q35
 
-      (* reasonable default for all modern Linux kernels *)
-      | ("i386"|"x86_64"), _, _ -> Q35
+            (* reasonable default for all modern Linux kernels *)
+            | _, _ -> Q35
+           ), true
+        )
 
-      | _ -> Virt in
+      | _ -> Virt, true
+    in
 
     (* Return guest capabilities from the convert () function. *)
     let guestcaps = {
@@ -155,7 +168,7 @@ let convert (g : G.guestfs) source inspect
keep_serial_console _        gcaps_machine = machine;
       gcaps_arch = Utils.kvm_arch inspect.i_arch;
       gcaps_acpi = acpi;
-      gcaps_virtio_1_0 = true;
+      gcaps_virtio_1_0 = virtio_1_0;
     } in
 
     guestcaps
diff --git a/convert/convert_windows.ml b/convert/convert_windows.ml
index 30e494ea02cb..1c2d17f26543 100644
--- a/convert/convert_windows.ml
+++ b/convert/convert_windows.ml
@@ -238,15 +238,27 @@ let convert (g : G.guestfs) _ inspect _ static_ips        
warning (f_"this guest has Anti-Virus (AV) software and a new virtio block
device driver was installed.  In some circumstances, AV may prevent new drivers
from working (resulting in a 7B boot error).  If this happens, try disabling AV
before doing the conversion.");
     );
 
-    (* Pivot on the year 2007.  Any Windows version from earlier than
-     * 2007 should use i440fx, anything 2007 or newer should use q35.
-     * Luckily this coincides almost exactly with the release of NT 6.
-     * XXX Look up this information in libosinfo in future.
-     *)
-    let machine -      match inspect.i_arch, inspect.i_major_version with
-      | ("i386"|"x86_64"), major -> if major < 6 then
I440FX else Q35
-      | _ -> Virt in
+    let machine, virtio_1_0 +      match inspect.i_arch with
+      | ("i386"|"x86_64") ->
+        (try
+           let os = Libosinfo_utils.get_os_by_short_id inspect.i_osinfo in
+           let devices = os#get_devices () in
+           debug "libosinfo devices for OS \"%s\":\n%s"
inspect.i_osinfo
+             (Libosinfo_utils.string_of_osinfo_device_list devices);
+           let { Libosinfo_utils.q35; vio10 } +            
Libosinfo_utils.os_support_of_osinfo_device_list devices in
+           (if q35 then Q35 else I440FX), vio10
+         with
+         | Not_found ->
+           (* Pivot on the year 2007.  Any Windows version from earlier than
+            * 2007 should use i440fx, anything 2007 or newer should use q35.
+            * Luckily this coincides almost exactly with the release of NT 6.
+            *)
+           (if inspect.i_major_version < 6 then I440FX else Q35), true
+        )
+      | _ -> Virt, true
+    in
 
     (* Return guest capabilities from the convert () function. *)
     let guestcaps = {
@@ -259,7 +271,7 @@ let convert (g : G.guestfs) _ inspect _ static_ips       
gcaps_machine = machine;
       gcaps_arch = Utils.kvm_arch inspect.i_arch;
       gcaps_acpi = true;
-      gcaps_virtio_1_0 = true;
+      gcaps_virtio_1_0 = virtio_1_0;
     } in
 
     guestcaps
diff --git a/tests/test-v2v-cdrom.expected b/tests/test-v2v-cdrom.expected
index 17bd152d8e64..b950492969c8 100644
--- a/tests/test-v2v-cdrom.expected
+++ b/tests/test-v2v-cdrom.expected
@@ -1,4 +1,4 @@
-    <disk type='file' device='disk'>
+    <disk type='file' device='disk'
model='virtio-transitional'>
       <driver name='qemu' type='raw'/>
       <target dev='vda' bus='virtio'/>
     </disk>
diff --git a/tests/test-v2v-floppy.expected b/tests/test-v2v-floppy.expected
index a718c21f94dd..f4b679540c9d 100644
--- a/tests/test-v2v-floppy.expected
+++ b/tests/test-v2v-floppy.expected
@@ -1,4 +1,4 @@
-    <disk type='file' device='disk'>
+    <disk type='file' device='disk'
model='virtio-transitional'>
       <driver name='qemu' type='raw'/>
       <target dev='vda' bus='virtio'/>
     </disk>
diff --git a/tests/test-v2v-i-ova.xml b/tests/test-v2v-i-ova.xml
index 9f3c1974243f..2b6a8de0f432 100644
--- a/tests/test-v2v-i-ova.xml
+++ b/tests/test-v2v-i-ova.xml
@@ -21,7 +21,7 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
-    <disk type='file' device='disk'>
+    <disk type='file' device='disk'
model='virtio-transitional'>
       <driver name='qemu' type='raw'/>
       <source file='TestOva-sda'/>
       <target dev='vda' bus='virtio'/>
@@ -36,16 +36,16 @@
     </disk>
     <interface type='bridge'>
       <source bridge='VM Network'/>
-      <model type='virtio'/>
+      <model type='virtio-transitional'/>
     </interface>
     <video>
       <model type='vga' vram='16384' heads='1'/>
     </video>
     <graphics type='vnc' autoport='yes'
port='-1'/>
-    <rng model='virtio'>
+    <rng model='virtio-transitional'>
       <backend model='random'>/dev/urandom</backend>
     </rng>
-    <memballoon model='virtio'/>
+    <memballoon model='virtio-transitional'/>
     <viosock model='none'/>
     <input type='tablet' bus='usb'/>
     <input type='mouse' bus='ps2'/>
-- 
2.19.1.3.g30247aa5d201

Laszlo Ersek

2022-Jan-07 11:43 UTC

head link

[Libguestfs] [v2v PATCH 0/9] generate virtio-transitional devices if told so by libosinfo

On 01/06/22 15:09, Laszlo Ersek wrote:> Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>
> The first part of the series introduces the "gcaps_virtio_1_0"
guest
> capability (default value, according to the current virt-v2v assumption:
> "true"), and updates the libvirt and JSON outputs to take the new
> capability into account.
>
> In the libvirt output, the virtio device models are flipped to -- or are
> explicitly introduced as -- virtio-transitional if the machine type is
> Q35 and the new "gcaps_virtio_1_0" capability is
"false".
>
> In the JSON output, we don't change any device models, only expose the
> new capability, and allow CNV / KubeVirt to act upon it. This follows
> the spirit of
<https://bugzilla.redhat.com/show_bug.cgi?id=1942325#c11>.
>
> The second part of the series wraps the osinfo_os_get_all_devices()
> libosinfo API, and introduces a dependent function to retrieve the guest
> OS's support for each of the Q35 chipset and the virtio-1.0 protocol
> (extrapolated from support for virtio1.0-net), from the osinfo database.
>
> The final patch in the series couples the two previous parts. The Notes
> section of this patch contains extensive test results.
>
> Thanks,
> Laszlo
>
> Laszlo Ersek (9):
>   lib/types: reformat "string_of_guestcaps"
>   lib/types: update "string_of_guestcaps"
>   lib/types: introduce the "gcaps_virtio_1_0" guest capability
>   output/create_libvirt_xml: pick "virtio-transitional" models
when
>     needed
>   output/create_json: expose "gcaps_virtio_1_0"
>   convert/libosinfo: wrap osinfo_os_get_all_devices()
>   convert/libosinfo_utils: introduce
"string_of_osinfo_device_list"
>   convert/libosinfo_utils: introduce
"os_support_of_osinfo_device_list"
>   convert: determine machine type and virtio-1.0 from osinfo for x86
>     guests
>
>  convert/convert_linux.ml       | 50 +++++++++------
>  convert/convert_windows.ml     | 31 ++++++---
>  convert/libosinfo-c.c          | 66 ++++++++++++++++++++
>  convert/libosinfo.ml           | 14 +++++
>  convert/libosinfo.mli          | 14 +++++
>  convert/libosinfo_utils.ml     | 54 ++++++++++++++++
>  convert/libosinfo_utils.mli    | 17 +++++
>  lib/types.ml                   | 24 +++++--
>  lib/types.mli                  |  4 ++
>  output/create_json.ml          |  1 +
>  output/create_libvirt_xml.ml   | 28 ++++++---
>  tests/test-v2v-cdrom.expected  |  2 +-
>  tests/test-v2v-floppy.expected |  2 +-
>  tests/test-v2v-i-ova.xml       |  8 +--
>  14 files changed, 266 insertions(+), 49 deletions(-)
>
>
> base-commit: 07b12fe99fb9cf0b75fe45d3eaa07b4bbc1bbe89
>
Merged as commit range f9d5448d2efe..f0cea012d018, with the following updates
(as requested by Rich), and with the test suite re-run:
>  1:  6ffaacdf079a !  1:  dc69bb6033bd lib/types: reformat
"string_of_guestcaps"
>     @@ -8,6 +8,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-2-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/lib/types.ml b/lib/types.ml
>      --- a/lib/types.ml
>  2:  47b1335ef3d6 !  2:  08786886302c lib/types: update
"string_of_guestcaps"
>     @@ -18,6 +18,8 @@
>          Fixes: 05f780c16f0135c657615520c2245b42de1efc3e
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-3-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/lib/types.ml b/lib/types.ml
>      --- a/lib/types.ml
>  3:  700768d96d72 !  3:  789017805ad0 lib/types: introduce the
"gcaps_virtio_1_0" guest capability
>     @@ -13,6 +13,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-4-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/lib/types.mli b/lib/types.mli
>      --- a/lib/types.mli
>  4:  cb19eff53aaa !  4:  e4cf85bd3ad4 output/create_libvirt_xml: pick
"virtio-transitional" models when needed
>     @@ -24,6 +24,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-5-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/output/create_libvirt_xml.ml
b/output/create_libvirt_xml.ml
>      --- a/output/create_libvirt_xml.ml
>  5:  f0162a5024a2 !  5:  511910e1f7e9 output/create_json: expose
"gcaps_virtio_1_0"
>     @@ -9,6 +9,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-6-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/output/create_json.ml b/output/create_json.ml
>      --- a/output/create_json.ml
>  6:  c9a39ebc6842 !  6:  46f5885dba1b convert/libosinfo: wrap
osinfo_os_get_all_devices()
>     @@ -7,6 +7,9 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-7-lersek at redhat.com>
>     +    [lersek at redhat.com: call OCaml values
"<something>v" (Rich)]
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/convert/libosinfo.mli b/convert/libosinfo.mli
>      --- a/convert/libosinfo.mli
>     @@ -115,12 +118,12 @@
>      +v2v_osinfo_os_get_all_devices (value osv)
>      +{
>      +  CAMLparam1 (osv);
>     -+  CAMLlocal3 (retval, link, props);
>     ++  CAMLlocal3 (retvalv, linkv, propsv);
>      +  g_autoptr (OsinfoDeviceList) dev_list = NULL;
>      +  OsinfoList *ent_list;
>      +  gint ent_nr;
>      +
>     -+  retval = Val_emptylist;
>     ++  retvalv = Val_emptylist;
>      +  dev_list = osinfo_os_get_all_devices (OsinfoOs_t_val (osv), NULL);
>      +  ent_list = OSINFO_LIST (dev_list);
>      +  ent_nr = osinfo_list_get_length (ent_list);
>     @@ -132,21 +135,21 @@
>      +    --ent_nr;
>      +    ent = osinfo_list_get_nth (ent_list, ent_nr);
>      +
>     -+    props = caml_alloc (NUM_DEVICE_PROPS, 0);
>     ++    propsv = caml_alloc (NUM_DEVICE_PROPS, 0);
>      +    for (prop_nr = 0; prop_nr < NUM_DEVICE_PROPS; ++prop_nr) {
>      +      const gchar *prop_val;
>      +
>      +      prop_val = osinfo_entity_get_param_value (ent,
device_prop[prop_nr]);
>      +      if (prop_val == NULL)
>      +        prop_val = "";
>     -+      Store_field (props, prop_nr, caml_copy_string (prop_val));
>     ++      Store_field (propsv, prop_nr, caml_copy_string (prop_val));
>      +    }
>      +
>     -+    link = caml_alloc (2, 0);
>     -+    Store_field (link, 0, props);
>     -+    Store_field (link, 1, retval);
>     -+    retval = link;
>     ++    linkv = caml_alloc (2, 0);
>     ++    Store_field (linkv, 0, propsv);
>     ++    Store_field (linkv, 1, retvalv);
>     ++    retvalv = linkv;
>      +  }
>      +
>     -+  CAMLreturn (retval);
>     ++  CAMLreturn (retvalv);
>      +}
>  7:  beb6d02a55bf !  7:  00473c6ac09d convert/libosinfo_utils: introduce
"string_of_osinfo_device_list"
>     @@ -9,6 +9,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-8-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/convert/libosinfo_utils.mli b/convert/libosinfo_utils.mli
>      --- a/convert/libosinfo_utils.mli
>  8:  1f37f5440d66 !  8:  2a2d7e9e1376 convert/libosinfo_utils: introduce
"os_support_of_osinfo_device_list"
>     @@ -13,6 +13,10 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-9-lersek at redhat.com>
>     +    [lersek at redhat.com: don't break "in" to a new
line after a "let" that
>     +     defines a non-function (Rich)]
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/convert/libosinfo_utils.mli b/convert/libosinfo_utils.mli
>      --- a/convert/libosinfo_utils.mli
>     @@ -57,8 +61,7 @@
>      +      accu
>      +    | { q35; vio10 }, { Libosinfo.id } :: tail ->
>      +      let q35 = q35 || id =
"http://qemu.org/chipset/x86/q35"
>     -+      and vio10 = vio10 || id =
"http://pcisig.com/pci/1af4/1041"
>     -+      in
>     ++      and vio10 = vio10 || id =
"http://pcisig.com/pci/1af4/1041" in
>      +      next { q35; vio10 } tail
>      +  in
>      +  next { q35 = false; vio10 = false }
>  9:  0ba32aed5e96 !  9:  f0cea012d018 convert: determine machine type and
virtio-1.0 from osinfo for x86 guests
>     @@ -16,6 +16,8 @@
>
>          Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1942325
>          Signed-off-by: Laszlo Ersek <lersek at redhat.com>
>     +    Message-Id: <20220106140910.13695-10-lersek at redhat.com>
>     +    Acked-by: Richard W.M. Jones <rjones at redhat.com>
>
>      diff --git a/convert/convert_linux.ml b/convert/convert_linux.ml
>      --- a/convert/convert_linux.ml
I'll follow up with the "explicit temporaries" patch later.

Thanks!
Laszlo

Libguestfs - Jan 2022 - [v2v PATCH 6/9] convert/libosinfo: wrap osinfo_os_get_all_devices()

[Libguestfs] [v2v PATCH 0/9] generate virtio-transitional devices if told so by libosinfo

[Libguestfs] [v2v PATCH 1/9] lib/types: reformat "string_of_guestcaps"

[Libguestfs] [v2v PATCH 2/9] lib/types: update "string_of_guestcaps"

[Libguestfs] [v2v PATCH 3/9] lib/types: introduce the "gcaps_virtio_1_0" guest capability

[Libguestfs] [v2v PATCH 4/9] output/create_libvirt_xml: pick "virtio-transitional" models when needed

[Libguestfs] [v2v PATCH 5/9] output/create_json: expose "gcaps_virtio_1_0"

[Libguestfs] [v2v PATCH 6/9] convert/libosinfo: wrap osinfo_os_get_all_devices()

[Libguestfs] [v2v PATCH 7/9] convert/libosinfo_utils: introduce "string_of_osinfo_device_list"

[Libguestfs] [v2v PATCH 8/9] convert/libosinfo_utils: introduce "os_support_of_osinfo_device_list"

[Libguestfs] [v2v PATCH 9/9] convert: determine machine type and virtio-1.0 from osinfo for x86 guests

[Libguestfs] [v2v PATCH 0/9] generate virtio-transitional devices if told so by libosinfo