[Libguestfs] [PATCH 4/4] v2v: win: factor out common bits in registry patching
Roman Kagan
rkagan at virtuozzo.com
Wed Apr 6 17:24:48 UTC 2016
Refactor registry patching to share common parts between Win <= 7 and
Win >= 8. Also branch between the two based on the presence of the
DriverDatabase subtree rather than on the OS version, which allows not
to pass the inspect handle into the functions.
OTOH make the patching functions accept the driver name and device PCI
id as arguments; this will allow to easily expand the code to support
other drivers (e.g. vioscsi) later on.
Signed-off-by: Roman Kagan <rkagan at virtuozzo.com>
---
v2v/windows_virtio.ml | 91 ++++++++++++++++++++++++++-------------------------
1 file changed, 46 insertions(+), 45 deletions(-)
diff --git a/v2v/windows_virtio.ml b/v2v/windows_virtio.ml
index c76a677..7ca4068 100644
--- a/v2v/windows_virtio.ml
+++ b/v2v/windows_virtio.ml
@@ -33,6 +33,9 @@ let virtio_win =
with Not_found ->
Guestfs_config.datadir // "virtio-win"
+let scsi_class_guid = "{4D36E97B-E325-11CE-BFC1-08002BE10318}"
+let viostor_pciid = "VEN_1AF4&DEV_1001&SUBSYS_00021AF4&REV_00"
+
let rec install_drivers g inspect systemroot root current_cs rcaps =
(* Copy the virtio drivers to the guest. *)
let driverdir = sprintf "%s/Drivers/VirtIO" systemroot in
@@ -82,7 +85,8 @@ let rec install_drivers g inspect systemroot root current_cs rcaps =
let target = sprintf "%s/system32/drivers/viostor.sys" systemroot in
let target = g#case_sensitive_path target in
g#cp source target;
- add_viostor_to_registry g inspect root current_cs;
+ add_guestor_to_registry g root current_cs "viostor"
+ viostor_pciid;
Virtio_blk
| Some IDE, _ ->
@@ -133,35 +137,40 @@ let rec install_drivers g inspect systemroot root current_cs rcaps =
(block, net, video)
)
-and add_viostor_to_registry g inspect root current_cs =
- let { i_major_version = major; i_minor_version = minor;
- i_arch = arch } = inspect in
- if (major == 6 && minor >= 2) || major >= 7 then (* Windows >= 8 *)
- add_viostor_to_driver_database g root arch current_cs
- else (* Windows <= 7 *)
- add_viostor_to_critical_device_database g root current_cs
+and add_guestor_to_registry g root current_cs drv_name drv_pciid =
+ let ddb_node = g#hivex_node_get_child root "DriverDatabase" in
-and add_viostor_to_critical_device_database g root current_cs =
- (* See http://rwmj.wordpress.com/2010/04/30/tip-install-a-device-driver-in-a-windows-vm/
- * NB: All these edits are in the HKLM\SYSTEM hive. No other
- * hive may be modified here.
- *)
- let regedits = [
- [ current_cs; "Control"; "CriticalDeviceDatabase"; "pci#ven_1af4&dev_1001&subsys_00021af4&rev_00" ],
- [ "Service", REG_SZ "viostor";
- "ClassGUID", REG_SZ "{4D36E97B-E325-11CE-BFC1-08002BE10318}" ];
+ let regedits =
+ if ddb_node = 0L then
+ cdb_regedits current_cs drv_name drv_pciid
+ else
+ ddb_regedits current_cs drv_name drv_pciid in
- [ current_cs; "Services"; "viostor" ],
+ let drv_sys_path = sprintf "system32\\drivers\\%s.sys" drv_name in
+ let common_regedits = [
+ [ current_cs; "Services"; drv_name ],
[ "Type", REG_DWORD 0x1_l;
"Start", REG_DWORD 0x0_l;
"Group", REG_SZ "SCSI miniport";
"ErrorControl", REG_DWORD 0x1_l;
- "ImagePath", REG_EXPAND_SZ "system32\\drivers\\viostor.sys" ];
- ] in
+ "ImagePath", REG_EXPAND_SZ drv_sys_path ];
+ ] in
- reg_import g root regedits
+ reg_import g root (regedits @ common_regedits)
-and add_viostor_to_driver_database g root arch current_cs =
+and cdb_regedits current_cs drv_name drv_pciid =
+ (* See http://rwmj.wordpress.com/2010/04/30/tip-install-a-device-driver-in-a-windows-vm/
+ * NB: All these edits are in the HKLM\SYSTEM hive. No other
+ * hive may be modified here.
+ *)
+ [
+ [ current_cs; "Control"; "CriticalDeviceDatabase";
+ "PCI#" ^ drv_pciid ],
+ [ "Service", REG_SZ drv_name;
+ "ClassGUID", REG_SZ scsi_class_guid ];
+ ]
+
+and ddb_regedits current_cs drv_name drv_pciid =
(* Windows >= 8 doesn't use the CriticalDeviceDatabase. Instead
* one must add keys into the DriverDatabase.
*)
@@ -170,32 +179,24 @@ and add_viostor_to_driver_database g root arch current_cs =
let drv_inf_label = drv_inf ^ "_tmp" in
let drv_config = "guestor_conf" in
- let regedits = [
- [ current_cs; "Services"; "viostor" ],
- [ "ErrorControl", REG_DWORD 0x1_l;
- "Group", REG_SZ "SCSI miniport";
- "ImagePath", REG_EXPAND_SZ "system32\\drivers\\viostor.sys";
- "Start", REG_DWORD 0x0_l;
- "Type", REG_DWORD 0x1_l ];
-
- [ "DriverDatabase"; "DriverInfFiles"; drv_inf ],
- [ "", REG_MULTI_SZ [ drv_inf_label ];
- "Active", REG_SZ drv_inf_label;
- "Configurations", REG_MULTI_SZ [ drv_config ]
- ];
-
- [ "DriverDatabase"; "DeviceIds"; "PCI"; "VEN_1AF4&DEV_1001&SUBSYS_00021AF4&REV_00" ],
- [ drv_inf, REG_BINARY "\x01\xff\x00\x00" ];
+ [
+ [ "DriverDatabase"; "DriverInfFiles"; drv_inf ],
+ [ "", REG_MULTI_SZ [ drv_inf_label ];
+ "Active", REG_SZ drv_inf_label;
+ "Configurations", REG_MULTI_SZ [ drv_config ] ];
- [ "DriverDatabase"; "DriverPackages"; drv_inf_label; "Configurations"; drv_config ],
- [ "ConfigFlags", REG_DWORD 0_l;
- "Service", REG_SZ "viostor" ];
+ [ "DriverDatabase"; "DeviceIds"; "PCI"; drv_pciid ],
+ [ drv_inf, REG_BINARY "\x01\xff\x00\x00" ];
- [ "DriverDatabase"; "DriverPackages"; drv_inf_label; "Descriptors"; "PCI"; "VEN_1AF4&DEV_1001&SUBSYS_00021AF4&REV_00" ],
- [ "Configuration", REG_SZ drv_config ]
- ] in
+ [ "DriverDatabase"; "DriverPackages"; drv_inf_label;
+ "Configurations"; drv_config ],
+ [ "ConfigFlags", REG_DWORD 0_l;
+ "Service", REG_SZ drv_name ];
- reg_import g root regedits
+ [ "DriverDatabase"; "DriverPackages"; drv_inf_label;
+ "Descriptors"; "PCI"; drv_pciid ],
+ [ "Configuration", REG_SZ drv_config ];
+ ]
(* Copy the matching drivers to the driverdir; return true if any have
* been copied.
--
2.5.5
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