[Libguestfs] [PATCH v4 8/9] v2v: windows: Prefer virtio-win ISO over directory (RHBZ#1438794).
The exploded tree has many missing drivers (eg. virtio-rng).
The ISO contains the complete set, so prefer it.
---
v2v/virt-v2v.pod | 34 +++++++++++++++++++++++++---------
v2v/windows_virtio.ml | 4 +++-
2 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/v2v/virt-v2v.pod b/v2v/virt-v2v.pod
index 5d6628d65..ff6e020a6 100644
--- a/v2v/virt-v2v.pod
+++ b/v2v/virt-v2v.pod
@@ -607,10 +607,10 @@ the named root device does not exist or was not detected as a root
device, then virt-v2v will fail.
Note that there is a bug in grub which prevents it from successfully
-booting a multiboot system if VirtIO is enabled. Grub is only able to
-boot an operating system from the first VirtIO disk. Specifically,
-F</boot> must be on the first VirtIO disk, and it cannot chainload an
-OS which is not in the first VirtIO disk.
+booting a multiboot system if virtio is enabled. Grub is only able to
+boot an operating system from the first virtio disk. Specifically,
+F</boot> must be on the first virtio disk, and it cannot chainload an
+OS which is not in the first virtio disk.
=item B<--vdsm-compat=0.10>
@@ -766,9 +766,8 @@ below.
Ubuntu 10.04+ All versions support virtio
- Windows Drivers are installed from the directory pointed to by
- "VIRTIO_WIN" environment variable
- (/usr/share/virtio-win by default) if present
+ Windows Drivers are installed from the ISO or directory pointed
+ to by "VIRTIO_WIN" environment variable if present
=head1 RHEL 4
@@ -2014,8 +2013,25 @@ distributed with virt-v2v.
=item C<VIRTIO_WIN>
-This is where VirtIO drivers for Windows are searched for
-(F</usr/share/virtio-win> if unset). It can be a directory I<or>
+This is where virtio drivers for Windows are searched for.
+
+If unset, then we look for drivers in whichever of these paths
+is found first:
+
+=over 4
+
+=item F</usr/share/virtio-win/virtio-win.iso>
+
+The ISO containing virtio drivers for Windows.
+
+=item F</usr/share/virtio-win>
+
+The exploded tree of virtio drivers for Windows. This is
+usually incomplete, hence the ISO is preferred.
+
+=back
+
+(F<> if unset). It can be a directory I<or>
point to F<virtio-win.iso> (CD ROM image containing drivers).
See L<ENABLING VIRTIO>.
diff --git a/v2v/windows_virtio.ml b/v2v/windows_virtio.ml
index 84a16e34e..6c9708c03 100644
--- a/v2v/windows_virtio.ml
+++ b/v2v/windows_virtio.ml
@@ -31,7 +31,9 @@ let virtio_win =
with Not_found ->
try Sys.getenv "VIRTIO_WIN_DIR" (* old name for VIRTIO_WIN *)
with Not_found ->
- Guestfs_config.datadir // "virtio-win"
+ let iso = Guestfs_config.datadir // "virtio-win" //
"virtio-win.iso" in
+ if Sys.file_exists iso then iso
+ else 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"
--
2.12.0