tools/libxl: Drop xc_domain_configuration_t from libxl__domain_build_state

The data it stores is initialised and exclusively used within
libxl__domain_make(), with the important details written back elsewhere by
libxl__arch_domain_save_config().  Prepare xc_config on libxl__domain_make()'s
stack, and drop the parameter.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 2b5c7ee537244ac114491c938e0eec9f93f5223f..889c1e648ba8d3fafdc7efe4d41fe80557e303e3 100644 (file)
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -538,7 +538,7 @@ out:
 }
 
 int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
-                       uint32_t *domid, xc_domain_configuration_t *xc_config)
+                       uint32_t *domid)
 {
     libxl_ctx *ctx = libxl__gc_owner(gc);
     int flags, ret, rc, nb_vm;
@@ -551,6 +551,7 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
     xs_transaction_t t = 0;
     xen_domain_handle_t handle;
     libxl_vminfo *vm_list;
+    xc_domain_configuration_t xc_config = {};
 
     /* convenience aliases */
     libxl_domain_create_info *info = &d_config->c_info;
@@ -571,7 +572,7 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
     /* Ultimately, handle is an array of 16 uint8_t, same as uuid */
     libxl_uuid_copy(ctx, (libxl_uuid *)handle, &info->uuid);
 
-    ret = libxl__arch_domain_prepare_config(gc, d_config, xc_config);
+    ret = libxl__arch_domain_prepare_config(gc, d_config, &xc_config);
     if (ret < 0) {
         LOGED(ERROR, *domid, "fail to get domain config");
         rc = ERROR_FAIL;
@@ -581,7 +582,7 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
     /* Valid domid here means we're soft resetting. */
     if (!libxl_domid_valid_guest(*domid)) {
         ret = xc_domain_create(ctx->xch, info->ssidref, handle, flags, domid,
-                               xc_config);
+                               &xc_config);
         if (ret < 0) {
             LOGED(ERROR, *domid, "domain creation fail");
             rc = ERROR_FAIL;
@@ -589,7 +590,7 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_config *d_config,
         }
     }
 
-    rc = libxl__arch_domain_save_config(gc, d_config, xc_config);
+    rc = libxl__arch_domain_save_config(gc, d_config, &xc_config);
     if (rc < 0)
         goto out;
 
@@ -822,7 +823,6 @@ static void initiate_domain_create(libxl__egc *egc,
 
     /* convenience aliases */
     libxl_domain_config *const d_config = dcs->guest_config;
-    libxl__domain_build_state *const state = &dcs->build_state;
     const int restore_fd = dcs->restore_fd;
 
     domid = dcs->domid_soft_reset;
@@ -957,7 +957,7 @@ static void initiate_domain_create(libxl__egc *egc,
         goto error_out;
     }
 
-    ret = libxl__domain_make(gc, d_config, &domid, &state->config);
+    ret = libxl__domain_make(gc, d_config, &domid);
     if (ret) {
         LOGD(ERROR, domid, "cannot make domain: %d", ret);
         dcs->guest_domid = domid;

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 7bbfa40a5aa7942e522f00f3fc4b6a149967d9b4..7f795a4ffdcb78649275325a0ba58aecbf760e1c 100644 (file)
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -1960,8 +1960,7 @@ void libxl__spawn_stub_dm(libxl__egc *egc, libxl__stub_dm_spawn_state *sdss)
     stubdom_state->pv_ramdisk.path = "";
 
     /* fixme: this function can leak the stubdom if it fails */
-    ret = libxl__domain_make(gc, dm_config, &sdss->pvqemu.guest_domid,
-                             &stubdom_state->config);
+    ret = libxl__domain_make(gc, dm_config, &sdss->pvqemu.guest_domid);
     if (ret)
         goto out;
     uint32_t dm_domid = sdss->pvqemu.guest_domid;

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index b0afde2846ea76c8dc983ff03a909fd8b6cc413a..584410d7052582bb7f55fc89f5d58f16a83e9e78 100644 (file)
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1145,8 +1145,6 @@ typedef struct {
     xen_vmemrange_t *vmemranges;
     uint32_t num_vmemranges;
 
-    xc_domain_configuration_t config;
-
     xen_pfn_t vuart_gfn;
     evtchn_port_t vuart_port;
 } libxl__domain_build_state;
@@ -1657,8 +1655,7 @@ _hidden  void libxl__exec(libxl__gc *gc, int stdinfd, int stdoutfd,
   * on exit (even error exit), domid may be valid and refer to a domain */
 _hidden int libxl__domain_make(libxl__gc *gc,
                                libxl_domain_config *d_config,
-                               uint32_t *domid,
-                               xc_domain_configuration_t *xc_config);
+                               uint32_t *domid);
 
 _hidden int libxl__domain_build(libxl__gc *gc,
                                 libxl_domain_config *d_config,