[Xen-devel] [PATCH v2 09/17] tools/libxl: Provide a static_data_done callback for domain restore

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This will be needed shortly to provide backwards compatiblity for migration
streams which do not have CPUID information contained within them.

No functional change yet.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>

v2:
 * Split/rearranged from v1
---
 tools/libxl/libxl_create.c         | 12 ++++++++++++
 tools/libxl/libxl_save_msgs_gen.pl |  1 +
 2 files changed, 13 insertions(+)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 32d45dcef0..12113185ac 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -1227,6 +1227,7 @@ static void domcreate_bootloader_done(libxl__egc *egc,
     dcs->srs.dcs = dcs;
 
     /* Restore */
+    callbacks->static_data_done = libxl__srm_callout_callback_static_data_done;
     callbacks->restore_results = libxl__srm_callout_callback_restore_results;
 
     /* COLO only supports HVM now because it does not work very
@@ -1296,6 +1297,17 @@ static void libxl__colo_restore_setup_done(libxl__egc 
*egc,
     libxl__stream_read_start(egc, &dcs->srs);
 }
 
+int libxl__srm_callout_callback_static_data_done(void *user)
+{
+    libxl__save_helper_state *shs = user;
+    libxl__domain_create_state *dcs = shs->caller_state;
+    STATE_AO_GC(dcs->ao);
+
+    /* Nothing to do (yet). */
+
+    return 0;
+}
+
 void libxl__srm_callout_callback_restore_results(xen_pfn_t store_mfn,
           xen_pfn_t console_mfn, void *user)
 {
diff --git a/tools/libxl/libxl_save_msgs_gen.pl 
b/tools/libxl/libxl_save_msgs_gen.pl
index 831a15e0bb..93dc252370 100755
--- a/tools/libxl/libxl_save_msgs_gen.pl
+++ b/tools/libxl/libxl_save_msgs_gen.pl
@@ -29,6 +29,7 @@ our @msgs = (
     [ 'srcxA',  "wait_checkpoint", [] ],
     [ 'scxA',   "switch_qemu_logdirty",  [qw(uint32_t domid
                                           unsigned enable)] ],
+    [ 'rcxW',   "static_data_done",      [] ],
     [ 'rcx',    "restore_results",       ['xen_pfn_t', 'store_gfn',
                                           'xen_pfn_t', 'console_gfn'] ],
     [ 'srW',    "complete",              [qw(int retval
-- 
2.11.0


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