[PATCH 3 of 6] libxl: specify HVM vs PV in build_info using libxl_domain_type enum

[Ian Campbell <ian.campbell@citrix.com>]

# HG changeset patch
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1310978325 -3600
# Node ID bd0ccd8f7e1370e78025084ea9ca3e4f04d7c6e0
# Parent  8c7190363635ebae729f5cf7f4ca254a0972326e
libxl: specify HVM vs PV in build_info using libxl_domain_type enum

Also caught one place (in libxl__domain_restore_common) which used
info->u.hvm.pae even if !hvm. (fortunately the value was unused in
xc_domain_restore).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl.c	Mon Jul 18 09:38:45 2011 +0100
@@ -2036,17 +2036,27 @@ int libxl_domain_need_memory(libxl_ctx *
         libxl_device_model_info *dm_info, uint32_t *need_memkb)
 {
     libxl__gc gc = LIBXL_INIT_GC(ctx);
+    int rc = ERROR_INVAL;
     *need_memkb = b_info->target_memkb;
-    if (b_info->hvm) {
+    switch (b_info->type) {
+    case LIBXL_DOMAIN_TYPE_HVM:
         *need_memkb += b_info->shadow_memkb + LIBXL_HVM_EXTRA_MEMORY;
         if (dm_info->device_model_stubdomain)
             *need_memkb += 32 * 1024;
-    } else
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
         *need_memkb += b_info->shadow_memkb + LIBXL_PV_EXTRA_MEMORY;
+        break;
+    default:
+        goto out;
+    }
     if (*need_memkb % (2 * 1024))
         *need_memkb += (2 * 1024) - (*need_memkb % (2 * 1024));
+    rc = 0;
+out:
     libxl__free_all(&gc);
-    return 0;
+    return rc;
+
 }
 
 int libxl_get_free_memory(libxl_ctx *ctx, uint32_t *memkb)
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl.idl
--- a/tools/libxl/libxl.idl	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl.idl	Mon Jul 18 09:38:45 2011 +0100
@@ -159,9 +159,9 @@ libxl_domain_build_info = Struct("domain
     ("shadow_memkb",    uint32),
     ("disable_migrate", bool),
     ("cpuid",           libxl_cpuid_policy_list),
-    ("hvm",             bool),
-    ("u", KeyedUnion(None, "hvm",
-                [("hvm", "%s", Struct(None,
+    ("type",            libxl_domain_type),
+    ("u", KeyedUnion(None, "type",
+                [("hvm", "%s == LIBXL_DOMAIN_TYPE_HVM", Struct(None,
                                        [("firmware", string),
                                         ("pae", bool),
                                         ("apic", bool),
@@ -174,7 +174,7 @@ libxl_domain_build_info = Struct("domain
                                         ("timer_mode", integer),
                                         ("nested_hvm", bool),
                                         ])),
-                 ("pv", "!%s", Struct(None,
+                 ("pv", "%s == LIBXL_DOMAIN_TYPE_PV", Struct(None,
                                        [("kernel", libxl_file_reference),
                                         ("slack_memkb", uint32),
                                         ("bootloader", string),
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl_bootloader.c
--- a/tools/libxl/libxl_bootloader.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_bootloader.c	Mon Jul 18 09:38:45 2011 +0100
@@ -323,7 +323,7 @@ int libxl_run_bootloader(libxl_ctx *ctx,
 
     struct stat st_buf;
 
-    if (info->hvm || !info->u.pv.bootloader)
+    if (info->type != LIBXL_DOMAIN_TYPE_PV || !info->u.pv.bootloader)
         goto out;
 
     rc = ERROR_INVAL;
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl_create.c
--- a/tools/libxl/libxl_create.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_create.c	Mon Jul 18 09:38:45 2011 +0100
@@ -84,7 +84,7 @@ void libxl_init_build_info(libxl_domain_
     b_info->shadow_memkb = 0;
     if (c_info->hvm) {
         b_info->video_memkb = 8 * 1024;
-        b_info->hvm = 1;
+        b_info->type = LIBXL_DOMAIN_TYPE_HVM;
         b_info->u.hvm.firmware = NULL;
         b_info->u.hvm.pae = 1;
         b_info->u.hvm.apic = 1;
@@ -96,6 +96,7 @@ void libxl_init_build_info(libxl_domain_
         b_info->u.hvm.timer_mode = 1;
         b_info->u.hvm.nested_hvm = 0;
     } else {
+        b_info->type = LIBXL_DOMAIN_TYPE_PV;
         b_info->u.pv.slack_memkb = 8 * 1024;
     }
 }
@@ -160,7 +161,8 @@ int libxl__domain_build(libxl__gc *gc,
 
     gettimeofday(&start_time, NULL);
 
-    if (info->hvm) {
+    switch (info->type) {
+    case LIBXL_DOMAIN_TYPE_HVM:
         ret = libxl__build_hvm(gc, domid, info, dm_info, state);
         if (ret)
             goto out;
@@ -172,7 +174,8 @@ int libxl__domain_build(libxl__gc *gc,
         vments[3] = "hvm";
         vments[4] = "start_time";
         vments[5] = libxl__sprintf(gc, "%lu.%02d", start_time.tv_sec,(int)start_time.tv_usec/10000);
-    } else {
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
         ret = libxl__build_pv(gc, domid, info, state);
         if (ret)
             goto out;
@@ -193,6 +196,10 @@ int libxl__domain_build(libxl__gc *gc,
             vments[i++] = "image/cmdline";
             vments[i++] = (char*) info->u.pv.cmdline;
         }
+        break;
+    default:
+        ret = ERROR_INVAL;
+        goto out;
     }
     ret = libxl__build_post(gc, domid, info, state, vments, localents);
 out:
@@ -219,7 +226,8 @@ static int domain_restore(libxl__gc *gc,
 
     gettimeofday(&start_time, NULL);
 
-    if (info->hvm) {
+    switch (info->type) {
+    case LIBXL_DOMAIN_TYPE_HVM:
         vments = libxl__calloc(gc, 7, sizeof(char *));
         vments[0] = "rtc/timeoffset";
         vments[1] = (info->u.hvm.timeoffset) ? info->u.hvm.timeoffset : "";
@@ -227,7 +235,8 @@ static int domain_restore(libxl__gc *gc,
         vments[3] = "hvm";
         vments[4] = "start_time";
         vments[5] = libxl__sprintf(gc, "%lu.%02d", start_time.tv_sec,(int)start_time.tv_usec/10000);
-    } else {
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
         vments = libxl__calloc(gc, 11, sizeof(char *));
         i = 0;
         vments[i++] = "image/ostype";
@@ -244,20 +253,24 @@ static int domain_restore(libxl__gc *gc,
             vments[i++] = "image/cmdline";
             vments[i++] = (char*) info->u.pv.cmdline;
         }
+        break;
+    default:
+        ret = ERROR_INVAL;
+        goto out;
     }
     ret = libxl__build_post(gc, domid, info, state, vments, localents);
     if (ret)
         goto out;
 
     dm_info->saved_state = NULL;
-    if (info->hvm) {
+    if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
         ret = asprintf(&dm_info->saved_state,
                        XC_DEVICE_MODEL_RESTORE_FILE".%d", domid);
         ret = (ret < 0) ? ERROR_FAIL : 0;
     }
 
 out:
-    if (!info->hvm) {
+    if (info->type == LIBXL_DOMAIN_TYPE_PV) {
         libxl__file_reference_unmap(&info->u.pv.kernel);
         libxl__file_reference_unmap(&info->u.pv.ramdisk);
     }
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl_dm.c
--- a/tools/libxl/libxl_dm.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_dm.c	Mon Jul 18 09:38:45 2011 +0100
@@ -642,12 +642,13 @@ static int libxl__create_stubdom(libxl__
     b_info.max_vcpus = 1;
     b_info.max_memkb = 32 * 1024;
     b_info.target_memkb = b_info.max_memkb;
+
+    b_info.type = LIBXL_DOMAIN_TYPE_PV;
     b_info.u.pv.kernel.path = libxl__abs_path(gc, "ioemu-stubdom.gz",
                                               libxl_xenfirmwaredir_path());
     b_info.u.pv.cmdline = libxl__sprintf(gc, " -d %d", info->domid);
     b_info.u.pv.ramdisk.path = "";
     b_info.u.pv.features = "";
-    b_info.hvm = 0;
 
     /* fixme: this function can leak the stubdom if it fails */
 
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/libxl_dom.c
--- a/tools/libxl/libxl_dom.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_dom.c	Mon Jul 18 09:38:45 2011 +0100
@@ -75,14 +75,14 @@ int libxl__build_pre(libxl__gc *gc, uint
     libxl_ctx *ctx = libxl__gc_owner(gc);
     xc_domain_max_vcpus(ctx->xch, domid, info->max_vcpus);
     xc_domain_setmaxmem(ctx->xch, domid, info->target_memkb + LIBXL_MAXMEM_CONSTANT);
-    if (!info->hvm)
+    if (info->type == LIBXL_DOMAIN_TYPE_PV)
         xc_domain_set_memmap_limit(ctx->xch, domid,
                 (info->max_memkb + info->u.pv.slack_memkb));
     xc_domain_set_tsc_info(ctx->xch, domid, info->tsc_mode, 0, 0, 0);
     if ( info->disable_migrate )
         xc_domain_disable_migrate(ctx->xch, domid);
 
-    if (info->hvm) {
+    if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
         unsigned long shadow;
         shadow = (info->shadow_memkb + 1023) / 1024;
         xc_shadow_control(ctx->xch, domid, XEN_DOMCTL_SHADOW_OP_SET_ALLOCATION, NULL, 0, &shadow, 0, NULL);
@@ -340,10 +340,25 @@ int libxl__domain_restore_common(libxl__
     libxl_ctx *ctx = libxl__gc_owner(gc);
     /* read signature */
     int rc;
+    int hvm, pae, superpages;
+    switch (info->type) {
+    case LIBXL_DOMAIN_TYPE_HVM:
+        hvm = 1;
+        superpages = 1;
+        pae = info->u.hvm.pae;
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
+        hvm = 0;
+        superpages = 0;
+        pae = 1;
+        break;
+    default:
+        return ERROR_INVAL;
+    }
     rc = xc_domain_restore(ctx->xch, fd, domid,
-                             state->store_port, &state->store_mfn,
-                             state->console_port, &state->console_mfn,
-                             info->hvm, info->u.hvm.pae, !!info->hvm);
+                           state->store_port, &state->store_mfn,
+                           state->console_port, &state->console_mfn,
+                           hvm, pae, superpages);
     if ( rc ) {
         LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "restoring domain");
         return ERROR_FAIL;
diff -r 8c7190363635 -r bd0ccd8f7e13 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/xl_cmdimpl.c	Mon Jul 18 09:38:45 2011 +0100
@@ -381,7 +381,7 @@ static void printf_info(int domid,
         printf("\t\t\t(spiceagent_mouse %d)\n", dm_info->spiceagent_mouse);
         printf("\t\t)\n");
     } else {
-        printf("\t\t(linux %d)\n", b_info->hvm);
+        printf("\t\t(linux %d)\n", 0);
         printf("\t\t\t(kernel %s)\n", b_info->u.pv.kernel.path);
         printf("\t\t\t(cmdline %s)\n", b_info->u.pv.cmdline);
         printf("\t\t\t(ramdisk %s)\n", b_info->u.pv.ramdisk.path);