add patch to force virtio_blk or virtio_scsi via environment variable

OBS-URL: https://build.opensuse.org/package/show/Virtualization/libguestfs?expand=0&rev=64

0001-force-virtio_blk-in-old-guest-kernel.patch

@@ -0,0 +1,55 @@
+From e823035a30944ba71b9d8e60b30a650425dc9711 Mon Sep 17 00:00:00 2001
+From: Olaf Hering <olaf@aepfle.de>
+Date: Mon, 3 Sep 2012 19:50:44 +0200
+Subject: [PATCH] force virtio_blk in old guest kernel
+
+Signed-off-by: Olaf Hering <olaf@aepfle.de>
+---
+ src/launch-appliance.c | 24 ++++++++++++++++++++++++
+ 1 Datei geändert, 24 Zeilen hinzugefügt(+)
+
+diff --git a/src/launch-appliance.c b/src/launch-appliance.c
+index 328cd19..796c268 100644
+--- a/src/launch-appliance.c
++++ b/src/launch-appliance.c
+@@ -881,6 +881,28 @@ is_openable (guestfs_h *g, const char *path, int flags)
+   return 1;
+ }
+ 
++/*
++ * Currently virtio_scsi is forced if qemu in the host supports this
++ * feature. This test does however not take the capabilities of the started
++ * guest into account. As a result no disks will be found if the guest
++ * kernel is older than 3.4.
++ */
++static void qemu_force_virtio_blk(guestfs_h *g)
++{
++#ifdef GUESTFS_QEMU_NO_VIRTIO_BLK
++	static const char env_string[] = "GUESTFS_QEMU_NO_VIRTIO_BLK";
++	char *p = getenv(env_string);
++	if (p) {
++		if (g->verbose)
++			guestfs___print_timestamped_message (g, "SuSE: %s in environment, preserving virtio-scsi setting.", env_string);
++	} else {
++		if (g->verbose)
++			guestfs___print_timestamped_message (g, "SuSE: %s not in environment, preventing virtio-scsi usage in old guest kernel.", env_string);
++		g->app.virtio_scsi = 2;
++	}
++#endif
++}
++
+ /* Returns 1 = use virtio-scsi, or 0 = use virtio-blk. */
+ static int
+ qemu_supports_virtio_scsi (guestfs_h *g)
+@@ -903,6 +925,8 @@ qemu_supports_virtio_scsi (guestfs_h *g)
+       g->app.virtio_scsi = 3;
+   }
+ 
++  qemu_force_virtio_blk(g);
++
+   return g->app.virtio_scsi == 1;
+ }
+ 
+-- 
+1.7.11.5
+

libguestfs-1.19.37.patch

@@ -1,16 +0,0 @@
----
- src/launch-appliance.c |    1 +
- 1 file changed, 1 insertion(+)
-
-Index: libguestfs-1.19.37/src/launch-appliance.c
-===================================================================
---- libguestfs-1.19.37.orig/src/launch-appliance.c
-+++ libguestfs-1.19.37/src/launch-appliance.c
-@@ -885,6 +885,7 @@ is_openable (guestfs_h *g, const char *p
- static int
- qemu_supports_virtio_scsi (guestfs_h *g)
- {
-+  return 0;
-   int r;
- 
-   /* g->app.virtio_scsi has these values:

libguestfs.spec

@@ -149,8 +149,8 @@ License:        LGPL-2.1
 Group:          System/Filesystems
 Version:        1.19.37
 Release:        0
-Patch0:         libguestfs-1.19.37.patch
 Patch5:         libguestfs-1.13.14-ruby.patch
+Patch100:       0001-force-virtio_blk-in-old-guest-kernel.patch
 Source0:        %{name}-%{version}.tar.gz
 Source10:       libguestfs.mkinitrd.boot.sh
 Source11:       libguestfs.mkinitrd.setup.sh
@@ -309,8 +309,8 @@ virtual machines.
 
 %prep
 %setup -q
-%patch0 -p1
 %patch5 -p1
+%patch100 -p1
 
 %build
 # disable qemu test.