virt-v2v/0015-test-data-phony-guests-Allow-virt-v2v-to-work-agains.patch

From 3c8d2e517491edd9241542f21f1203f098e29677 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 8 Jun 2022 16:24:18 +0100
Subject: [PATCH] test-data/phony-guests: Allow virt-v2v to work against phony
 Fedora

We didn't use the phony Fedora guest before with virt-v2v (only the
phony Windows image).  This commit makes miscellaneous changes so that
it can be used for testing:

 - Add dummy rpm and dracut commands.

 - Add dummy kernel, initramfs and modules directory.

 - Add dummy grub configuration pointing to the kernel.

(cherry picked from commit 1e75569aa074a50e96867d1021651ca2f75bcc16)
---
 .gitignore                                |  1 +
 test-data/phony-guests/Makefile.am        | 19 +++++--
 test-data/phony-guests/fedora.c           | 66 +++++++++++++++++++++++
 test-data/phony-guests/make-fedora-img.pl | 26 ++++++++-
 4 files changed, 107 insertions(+), 5 deletions(-)
 create mode 100644 test-data/phony-guests/fedora.c

diff --git a/.gitignore b/.gitignore
index 5a48ee58..dcafa39c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -119,6 +119,7 @@ Makefile.in
 /test-data/phony-guests/fedora-luks.img
 /test-data/phony-guests/fedora-md1.img
 /test-data/phony-guests/fedora-md2.img
+/test-data/phony-guests/fedora-static-bin
 /test-data/phony-guests/fedora.db
 /test-data/phony-guests/guests.xml
 /test-data/phony-guests/guests-all-good.xml
diff --git a/test-data/phony-guests/Makefile.am b/test-data/phony-guests/Makefile.am
index 60313548..c45ddc11 100644
--- a/test-data/phony-guests/Makefile.am
+++ b/test-data/phony-guests/Makefile.am
@@ -76,7 +76,8 @@ blank-%.img:
 # Make a (dummy) Fedora image.
 fedora.img: make-fedora-img.pl \
 		fedora-journal.tar.xz \
-		fedora.db
+		fedora.db \
+		fedora-static-bin
 	SRCDIR=$(srcdir) LAYOUT=partitions $(top_builddir)/run --test ./$<
 
 # Make a (dummy) Fedora image using md devices
@@ -84,7 +85,8 @@ fedora-md1.img fedora-md2.img: stamp-fedora-md.img
 
 stamp-fedora-md.img: make-fedora-img.pl \
 		fedora-journal.tar.xz \
-		fedora.db
+		fedora.db \
+		fedora-static-bin
 	rm -f $@
 	SRCDIR=$(srcdir) LAYOUT=partitions-md $(top_builddir)/run --test ./$<
 	touch $@
@@ -93,13 +95,15 @@ stamp-fedora-md.img: make-fedora-img.pl \
 # for root and home.
 fedora-btrfs.img: make-fedora-img.pl \
 		fedora-journal.tar.xz \
-		fedora.db
+		fedora.db \
+		fedora-static-bin
 	SRCDIR=$(srcdir) LAYOUT=btrfs $(top_builddir)/run --test ./$<
 
 # Make a (dummy) Fedora image with LVM encrypted with LUKS.
 fedora-luks.img: make-fedora-img.pl \
 		fedora-journal.tar.xz \
-		fedora.db
+		fedora.db \
+		fedora-static-bin
 	SRCDIR=$(srcdir) LAYOUT=lvm-luks $(top_builddir)/run --test ./$<
 
 # Make a (dummy) Debian image.
@@ -137,6 +141,13 @@ fedora.db: fedora-db.sql.xz
 	xzcat $< | $(SQLITE3) $@-t
 	mv $@-t $@
 
+# This is included in the phony Fedora image to act as a phony "rpm"
+# and "dracut" command.  For the use of -all-static here, see
+# libguestfs/tests/Makefile.am
+check_PROGRAMS = fedora-static-bin
+fedora_static_bin_SOURCES = fedora.c
+fedora_static_bin_LDFLAGS = -all-static
+
 windows-software: windows-software.reg
 	rm -f $@ $@-t
 	cp $(srcdir)/minimal-hive $@-t
diff --git a/test-data/phony-guests/fedora.c b/test-data/phony-guests/fedora.c
new file mode 100644
index 00000000..c74976d6
--- /dev/null
+++ b/test-data/phony-guests/fedora.c
@@ -0,0 +1,66 @@
+/* libguestfs test images
+ * Copyright (C) 2009-2020 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* This is "just enough" of a binary to look like RPM and dracut, as
+ * far as virt-v2v is concerned.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* NB: This is also defined in make-fedora-img.pl */
+#define KVER "5.19.0-0.rc1.14.fc37.x86_64"
+
+static const char *
+get_basename (const char *str)
+{
+  const char *ret = strrchr (str, '/');
+  return ret == NULL ? str : ret + 1;
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (argc == 3 &&
+      strcmp (get_basename (argv[0]), "rpm") == 0 &&
+      strcmp (argv[1], "-ql") == 0 &&
+      strncmp (argv[2], "kernel-", 7) == 0) {
+    /* XXX These files and directories actually exist.  It would be
+     * better to list files in /boot and /lib/modules matching a
+     * pattern rather than hard-coding the list here, which duplicates
+     * information in make-fedora-img.pl.
+     */
+    printf ("/boot/vmlinuz-" KVER "\n");
+    printf ("/lib/modules/" KVER "\n");
+    printf ("/lib/modules/" KVER "/kernel\n");
+    printf ("/lib/modules/" KVER "/kernel/drivers\n");
+    printf ("/lib/modules/" KVER "/kernel/drivers/block\n");
+    printf ("/lib/modules/" KVER "/kernel/drivers/block/virtio_blk.ko\n");
+  }
+  else if (argc >= 1 &&
+           strcmp (get_basename (argv[0]), "dracut") == 0) {
+    // do nothing, pretend to rebuild the initramfs
+  }
+  else {
+    fprintf (stderr, "phony Fedora: unknown command\n");
+    exit (1);
+  }
+
+  exit (0);
+}
diff --git a/test-data/phony-guests/make-fedora-img.pl b/test-data/phony-guests/make-fedora-img.pl
index f340f4d7..ad30960f 100755
--- a/test-data/phony-guests/make-fedora-img.pl
+++ b/test-data/phony-guests/make-fedora-img.pl
@@ -240,6 +240,7 @@ $g->mount ($bootdev, '/boot');
 $g->mkdir ('/bin');
 $g->mkdir ('/etc');
 $g->mkdir ('/etc/sysconfig');
+$g->mkdir ('/sbin');
 $g->mkdir ('/usr');
 $g->mkdir ('/usr/share');
 $g->mkdir ('/usr/share/zoneinfo');
@@ -276,8 +277,17 @@ $g->upload ($ENV{SRCDIR}.'/../binaries/bin-x86_64-dynamic', '/bin/ls');
 
 $g->tar_in ($ENV{SRCDIR}.'/fedora-journal.tar.xz', '/var/log/journal', compress => "xz");
 
+# NB: This is also defined in fedora.c
+my $kver = "5.19.0-0.rc1.14.fc37.x86_64";
 $g->mkdir ('/boot/grub');
-$g->touch ('/boot/grub/grub.conf');
+$g->write ('/boot/grub/grub.conf', <<EOF);
+title Fedora
+    root (hd0,0)
+    kernel /vmlinuz-$kver
+    initrd /initramfs-$kver.img
+EOF
+
+$g->touch ('/etc/modprobe.conf');
 
 # Test files.
 $g->write ('/etc/test1', 'abcdefg');
@@ -300,6 +310,20 @@ $g->ln_s ('/bin/test1', '/bin/test5');
 $g->mkfifo (0777, '/bin/test6');
 $g->mknod (0777, 10, 10, '/bin/test7');
 
+# Virt-v2v needs an RPM command, or at least something which acts
+# similarly, and also a dracut command.
+$g->upload ('fedora-static-bin', '/bin/rpm');
+$g->chmod (0777, '/bin/rpm');
+$g->upload ('fedora-static-bin', '/sbin/dracut');
+$g->chmod (0777, '/sbin/dracut');
+
+# Virt-v2v also needs a kernel, initrd and modules path.
+$g->touch ("/boot/vmlinuz-$kver");
+$g->touch ("/boot/initramfs-$kver.img");
+$g->mkdir_p ("/lib/modules/$kver/kernel/drivers/block");
+$g->upload ($ENV{SRCDIR}.'/../binaries/bin-x86_64-dynamic',
+            "/lib/modules/$kver/kernel/drivers/block/virtio_blk.ko");
+
 # Cleanup
 $g->shutdown ();
 $g->close ();
-- 
2.31.1