1:56 p.m.
Use, for example:
./run virt-p2v --test-disk=$(pwd)/test-data/phony-guests/windows.img
to test conversions using a file of test data instead of the real host
/dev/sda.
---
docs/guestfs-hacking.pod | 13 ++++++++-----
p2v/main.c | 32 +++++++++++++++++++++++++++++++-
p2v/virt-p2v.pod | 5 +++++
3 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/docs/guestfs-hacking.pod b/docs/guestfs-hacking.pod
index c8db955..4e325d6 100644
--- a/docs/guestfs-hacking.pod
+++ b/docs/guestfs-hacking.pod
@@ -757,12 +757,15 @@ in virt-v2v. They are converted in the same way as foreign VMs.
=head2 Running virt-p2v
-You can run the F<p2v/virt-p2v> binary directly, although it's not
-really recommended, but it's OK for quick tests of the GUI (but don't
-try doing a conversion that way).
+You can run the F<p2v/virt-p2v> binary directly, but it will try to
+convert your machine's real F</dev/sda> which is unlikely to work
+well. However virt-p2v also has a test mode in which you can supply a
+test disk:
-A better way is to run virt-p2v inside a VM on the local machine. To
-do that, do:
+ ./run virt-p2v --test-disk=../test-data/phony-guests/windows.img
+
+A more realistic test is to run virt-p2v inside a VM on the local
+machine. To do that, do:
make -C p2v run-virt-p2v
diff --git a/p2v/main.c b/p2v/main.c
index 40b1ff2..e1be311 100644
--- a/p2v/main.c
+++ b/p2v/main.c
@@ -43,6 +43,8 @@ char **all_disks;
char **all_removable;
char **all_interfaces;
+static const char *test_disk = NULL;
+
static void udevadm_settle (void);
static void set_config_defaults (struct config *config);
static void find_all_disks (void);
@@ -56,6 +58,7 @@ static const struct option long_options[] = {
{ "cmdline", 1, 0, 0 },
{ "long-options", 0, 0, 0 },
{ "short-options", 0, 0, 0 },
+ { "test-disk", 1, 0, 0 },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ 0, 0, 0, 0 }
@@ -155,6 +158,15 @@ main (int argc, char *argv[])
cmdline = parse_cmdline_string (optarg);
cmdline_source = CMDLINE_SOURCE_COMMAND_LINE;
}
+ else if (STREQ (long_options[option_index].name, "test-disk")) {
+ if (test_disk != NULL)
+ error (EXIT_FAILURE, 0,
+ _("only a single --test-disk option can be used"));
+ if (optarg[0] != '/')
+ error (EXIT_FAILURE, 0,
+ _("--test-disk must be an absolute path"));
+ test_disk = optarg;
+ }
else
error (EXIT_FAILURE, 0,
_("unknown long option: %s (%d)"),
@@ -298,11 +310,29 @@ set_config_defaults (struct config *config)
else
config->flags = 0;
- find_all_disks ();
+ /* Find all block devices in the system. */
+ if (!test_disk)
+ find_all_disks ();
+ else {
+ /* For testing and debugging purposes, you can use
+ * --test-disk=/path/to/disk.img
+ */
+ all_disks = malloc (2 * sizeof (char *));
+ if (all_disks == NULL)
+ error (EXIT_FAILURE, errno, "realloc");
+ all_disks[0] = strdup (test_disk);
+ if (all_disks[0] == NULL)
+ error (EXIT_FAILURE, errno, "strdup");
+ all_disks[1] = NULL;
+ }
if (all_disks)
config->disks = guestfs_int_copy_string_list (all_disks);
+
+ /* Find all removable devices in the system. */
if (all_removable)
config->removable = guestfs_int_copy_string_list (all_removable);
+
+ /* Find all network interfaces in the system. */
find_all_interfaces ();
if (all_interfaces)
config->interfaces = guestfs_int_copy_string_list (all_interfaces);
diff --git a/p2v/virt-p2v.pod b/p2v/virt-p2v.pod
index b4598d9..013efc2 100644
--- a/p2v/virt-p2v.pod
+++ b/p2v/virt-p2v.pod
@@ -581,6 +581,11 @@ Display help.
This is used for debugging. Instead of parsing the kernel command line
from F</proc/cmdline>, parse the string parameter C<CMDLINE>.
+=item B<--test-disk=/PATH/TO/DISK.IMG>
+
+For testing or debugging purposes, replace F</dev/sda> with a local
+file. You must use an absolute path.
+
=item B<-v>
=item B<--verbose>
--
2.7.4