xen/libxc-sr-LIBXL_HAVE_DOMAIN_SUSPEND_PROPS.patch

From: Olaf Hering <olaf@aepfle.de>
Date: Thu, 7 Jan 2021 15:58:30 +0100
Subject: libxc sr LIBXL_HAVE_DOMAIN_SUSPEND_PROPS

tools: adjust libxl_domain_suspend to receive a struct props

Upcoming changes will pass more knobs down to xc_domain_save.
Adjust the libxl_domain_suspend API to allow easy adding of additional knobs.

No change in behavior intented.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Christian Lindig <christian.lindig@citrix.com>
---
 tools/include/libxl.h           | 26 +++++++++++++++++++++++---
 tools/libs/light/libxl_domain.c |  7 ++++---
 tools/xl/xl_migrate.c           |  9 ++++++---
 tools/xl/xl_saverestore.c       |  3 ++-
 4 files changed, 35 insertions(+), 10 deletions(-)

--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -1850,13 +1850,28 @@ static inline int libxl_retrieve_domain_
     libxl_retrieve_domain_configuration_0x041200
 #endif
 
-int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, int fd,
-                         int flags, /* LIBXL_SUSPEND_* */
-                         const libxl_asyncop_how *ao_how)
-                         LIBXL_EXTERNAL_CALLERS_ONLY;
+/*
+ * LIBXL_HAVE_DOMAIN_SUSPEND_PROPS indicates that the
+ * libxl_domain_suspend_props() function takes a props struct.
+ */
+#define LIBXL_HAVE_DOMAIN_SUSPEND_PROPS 1
+
+typedef struct {
+    uint32_t flags; /* LIBXL_SUSPEND_* */
+} libxl_domain_suspend_suse_properties;
 #define LIBXL_SUSPEND_DEBUG 1
 #define LIBXL_SUSPEND_LIVE 2
 
+#define LIBXL_HAVE_DOMAIN_SUSPEND_SUSE
+int libxl_domain_suspend_suse(libxl_ctx *ctx, uint32_t domid, int fd,
+                              const libxl_domain_suspend_suse_properties *props, /* optional */
+                              const libxl_asyncop_how *ao_how)
+                              LIBXL_EXTERNAL_CALLERS_ONLY;
+
+int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, int fd, int flags,
+                         const libxl_asyncop_how *ao_how)
+                         LIBXL_EXTERNAL_CALLERS_ONLY;
+
 /*
  * Only suspend domain, do not save its state to file, do not destroy it.
  * Suspended domain can be resumed with libxl_domain_resume()
--- a/tools/libs/light/libxl_domain.c
+++ b/tools/libs/light/libxl_domain.c
@@ -502,7 +502,8 @@ static void domain_suspend_cb(libxl__egc
 
 }
 
-int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, int fd, int flags,
+static int do_libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, int fd,
+                         const libxl_domain_suspend_suse_properties *props,
                          const libxl_asyncop_how *ao_how)
 {
     AO_CREATE(ctx, domid, ao_how);
@@ -523,8 +524,8 @@ int libxl_domain_suspend(libxl_ctx *ctx,
     dss->domid = domid;
     dss->fd = fd;
     dss->type = type;
-    dss->live = flags & LIBXL_SUSPEND_LIVE;
-    dss->debug = flags & LIBXL_SUSPEND_DEBUG;
+    dss->live = props->flags & LIBXL_SUSPEND_LIVE;
+    dss->debug = props->flags & LIBXL_SUSPEND_DEBUG;
     dss->checkpointed_stream = LIBXL_CHECKPOINTED_STREAM_NONE;
 
     rc = libxl__fd_flags_modify_save(gc, dss->fd,
@@ -539,6 +540,21 @@ int libxl_domain_suspend(libxl_ctx *ctx,
     return AO_CREATE_FAIL(rc);
 }
 
+int libxl_domain_suspend_suse(libxl_ctx *ctx, uint32_t domid, int fd,
+                              const libxl_domain_suspend_suse_properties *props,
+                              const libxl_asyncop_how *ao_how)
+{
+    return do_libxl_domain_suspend(ctx, domid, fd, props, ao_how);
+}
+
+int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, int fd, int flags,
+                         const libxl_asyncop_how *ao_how)
+{
+    libxl_domain_suspend_suse_properties props = { .flags = flags };
+
+    return do_libxl_domain_suspend(ctx, domid, fd, &props, ao_how);
+}
+
 static void domain_suspend_empty_cb(libxl__egc *egc,
                               libxl__domain_suspend_state *dss, int rc)
 {
--- a/tools/xl/xl_migrate.c
+++ b/tools/xl/xl_migrate.c
@@ -186,7 +186,10 @@ static void migrate_domain(uint32_t domi
     char *away_domname;
     char rc_buf;
     uint8_t *config_data;
-    int config_len, flags = LIBXL_SUSPEND_LIVE;
+    int config_len;
+    libxl_domain_suspend_suse_properties props = {
+        .flags = LIBXL_SUSPEND_LIVE,
+        };
 
     save_domain_core_begin(domid, preserve_domid, override_config_file,
                            &config_data, &config_len);
@@ -205,8 +208,8 @@ static void migrate_domain(uint32_t domi
     xtl_stdiostream_adjust_flags(logger, XTL_STDIOSTREAM_HIDE_PROGRESS, 0);
 
     if (debug)
-        flags |= LIBXL_SUSPEND_DEBUG;
-    rc = libxl_domain_suspend(ctx, domid, send_fd, flags, NULL);
+        props.flags |= LIBXL_SUSPEND_DEBUG;
+    rc = libxl_domain_suspend_suse(ctx, domid, send_fd, &props, NULL);
     if (rc) {
         fprintf(stderr, "migration sender: libxl_domain_suspend failed"
                 " (rc=%d)\n", rc);
--- a/tools/xl/xl_saverestore.c
+++ b/tools/xl/xl_saverestore.c
@@ -130,6 +130,7 @@ static int save_domain(uint32_t domid, i
     int fd;
     uint8_t *config_data;
     int config_len;
+    libxl_domain_suspend_suse_properties props = {};
 
     save_domain_core_begin(domid, preserve_domid, override_config_file,
                            &config_data, &config_len);
@@ -146,7 +147,7 @@ static int save_domain(uint32_t domid, i
 
     save_domain_core_writeconfig(fd, filename, config_data, config_len);
 
-    int rc = libxl_domain_suspend(ctx, domid, fd, 0, NULL);
+    int rc = libxl_domain_suspend_suse(ctx, domid, fd, &props, NULL);
     close(fd);
 
     if (rc < 0) {