File 0001-test-whether-qemu-does-mandatory-locking.p... of Package libguestfs

Overview Repositories Revisions Requests Users Attributes Meta

File 0001-test-whether-qemu-does-mandatory-locking.patch of Package libguestfs

From 3d2b84231fca14b7e2beeeeab0e852f44dba0c21 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 11 Sep 2017 17:38:08 +0100
Subject: [PATCH] lib: qemu: Add accessor to test if qemu does mandatory
 locking.

QEMU >= 2.10 started to do mandatory locking.  This checks the QMP
schema to see if we are using that version of qemu.  (Note it is
sometimes disabled in downstream builds, and it was also enabled in
upstream prereleases with version 2.9.9x, so we cannot just check the
version number).
---
 lib/guestfs-internal.h |  1 +
 lib/qemu.c             | 65 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

Index: libguestfs-1.32.4/src/launch-direct.c
===================================================================
--- libguestfs-1.32.4.orig/src/launch-direct.c
+++ libguestfs-1.32.4/src/launch-direct.c
@@ -68,6 +68,7 @@ static char *make_appliance_dev (guestfs
 static void print_qemu_command_line (guestfs_h *g, char **argv);
 static int qemu_supports (guestfs_h *g, struct backend_direct_data *, const char *option);
 static int qemu_supports_device (guestfs_h *g, struct backend_direct_data *, const char *device_name);
+static int qemu_mandatory_locking (guestfs_h *g, const struct backend_direct_data *data);
 static int qemu_supports_virtio_scsi (guestfs_h *g, struct backend_direct_data *);
 static char *qemu_escape_param (guestfs_h *g, const char *param);
 
@@ -1095,6 +1096,18 @@ qemu_supports_device (guestfs_h *g, stru
   return strstr (data->qemu_devices, device_name) != NULL;
 }
 
+/**
+ * Test if the qemu binary uses mandatory file locking, added in
+ * QEMU >= 2.10 (but sometimes disabled).
+ */
+static int
+qemu_mandatory_locking (guestfs_h *g,
+                        const struct backend_direct_data *data)
+{
+  return data->qemu_version_major >= 2 ||
+    (data->qemu_version_major == 2 && data->qemu_version_minor >= 10);
+}
+
 /* Check if a file can be opened. */
 static int
 is_openable (guestfs_h *g, const char *path, int flags)

Places

File 0001-test-whether-qemu-does-mandatory-locking.patch of Package libguestfs

Places