[Xen-devel] [PATCH v3] libxl: Spice image compression setting support for upstream qemu

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Usage:
spice_image_compression=[auto_glz|auto_lz|quic|glz|lz|off]

Specifies what image compression is to be used by spice (if given),
otherwise the qemu default will be used.

Signed-off-by: Fabio Fantoni <fabio.fantoni@xxxxxxx>

---

Changes in v3:
- improved description in xl.cfg.pod.5
- libxl_dm.c, cutted long line for coding style limit

Changes in v2:
- refresh
---
 docs/man/xl.cfg.pod.5       |  6 ++++++
 tools/libxl/libxl.h         | 11 +++++++++++
 tools/libxl/libxl_dm.c      |  4 ++++
 tools/libxl/libxl_types.idl |  1 +
 tools/libxl/xl_cmdimpl.c    |  2 ++
 5 files changed, 24 insertions(+)

diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
index e2f91fc..0c2cbac 100644
--- a/docs/man/xl.cfg.pod.5
+++ b/docs/man/xl.cfg.pod.5
@@ -1427,6 +1427,12 @@ for redirection of up to 4 usb devices from spice client 
to domU's qemu.
 It requires an usb controller and if not defined it will automatically adds
 an usb2 controller. The default is disabled (0).
 
+=item B<spice_image_compression=[auto_glz|auto_lz|quic|glz|lz|off]>
+
+Specifies what image compression is to be used by spice (if given), otherwise
+the qemu default will be used. Please see documentations of your current qemu
+version for details.
+
 =back
 
 =head3 Miscellaneous Emulated Hardware
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 0a123f1..b8e0b67 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -528,6 +528,17 @@ typedef struct libxl__ctx libxl_ctx;
 #define LIBXL_HAVE_SPICE_USBREDIREDIRECTION 1
 
 /*
+ * LIBXL_HAVE_SPICE_IMAGECOMPRESSION
+ *
+ * If defined, then the libxl_spice_info structure will contain a string type
+ * field: image_compression. This value defines what Spice image compression
+ * is used.
+ *
+ * If this is not defined, the Spice image compression setting support is 
ignored.
+ */
+#define LIBXL_HAVE_SPICE_IMAGECOMPRESSION 1
+
+/*
  * LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS 1
  *
  * If this is defined, libxl_domain_create_restore()'s API has changed to
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index c2b0487..40c8649 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -398,6 +398,10 @@ static char *dm_spice_options(libxl__gc *gc,
     if (!libxl_defbool_val(spice->clipboard_sharing))
         opt = libxl__sprintf(gc, "%s,disable-copy-paste", opt);
 
+    if (spice->image_compression)
+        opt = libxl__sprintf(gc, "%s,image-compression=%s", opt,
+                             spice->image_compression);
+
     return opt;
 }
 
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 1214d2e..052ded9 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -241,6 +241,7 @@ libxl_spice_info = Struct("spice_info", [
     ("vdagent",     libxl_defbool),
     ("clipboard_sharing", libxl_defbool),
     ("usbredirection", integer),
+    ("image_compression", string),
     ])
 
 libxl_sdl_info = Struct("sdl_info", [
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 0b02a6c..00aa69d 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -1948,6 +1948,8 @@ skip_vfb:
                             &b_info->u.hvm.spice.clipboard_sharing, 0);
         if (!xlu_cfg_get_long (config, "spiceusbredirection", &l, 0))
             b_info->u.hvm.spice.usbredirection = l;
+        xlu_cfg_replace_string (config, "spice_image_compression",
+                                &b_info->u.hvm.spice.image_compression, 0);
         xlu_cfg_get_defbool(config, "nographic", &b_info->u.hvm.nographic, 0);
         xlu_cfg_get_defbool(config, "gfx_passthru",
                             &b_info->u.hvm.gfx_passthru, 0);
-- 
1.9.1


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