[PATCH 2 of 6] libxl: replace libxl__domain_is_hvm with libxl__domain_type

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

# HG changeset patch
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1310978325 -3600
# Node ID 8c7190363635ebae729f5cf7f4ca254a0972326e
# Parent  3237f9de6c5053543fa13a7303a8c48733c58afd
libxl: replace libxl__domain_is_hvm with libxl__domain_type

New function returns a libxl_domain_type enum.

Add LIBXL__DOMAIN_IS_TYPE helper macro.

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

diff -r 3237f9de6c50 -r 8c7190363635 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
@@ -240,7 +240,7 @@ int libxl_domain_resume(libxl_ctx *ctx, 
     libxl__gc gc = LIBXL_INIT_GC(ctx);
     int rc = 0;
 
-    if (libxl__domain_is_hvm(&gc, domid)) {
+    if (LIBXL__DOMAIN_IS_TYPE(&gc,  domid, HVM)) {
         LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "Called domain_resume on "
                 "non-cooperative hvm domain %u", domid);
         rc = ERROR_NI;
@@ -474,7 +474,7 @@ int libxl_domain_suspend(libxl_ctx *ctx,
                          uint32_t domid, int fd)
 {
     libxl__gc gc = LIBXL_INIT_GC(ctx);
-    int hvm = libxl__domain_is_hvm(&gc, domid);
+    int hvm = LIBXL__DOMAIN_IS_TYPE(&gc,  domid, HVM);
     int live = info != NULL && info->flags & XL_SUSPEND_LIVE;
     int debug = info != NULL && info->flags & XL_SUSPEND_DEBUG;
     int rc = 0;
@@ -517,7 +517,7 @@ int libxl_domain_unpause(libxl_ctx *ctx,
     char *state;
     int ret, rc = 0;
 
-    if (libxl__domain_is_hvm(&gc, domid)) {
+    if (LIBXL__DOMAIN_IS_TYPE(&gc,  domid, HVM)) {
         path = libxl__sprintf(&gc, "/local/domain/0/device-model/%d/state", domid);
         state = libxl__xs_read(&gc, XBT_NULL, path);
         if (state != NULL && !strcmp(state, "paused")) {
@@ -560,7 +560,7 @@ int libxl_domain_shutdown(libxl_ctx *ctx
         return ERROR_FAIL;
     }
 
-    if (libxl__domain_is_hvm(&gc, domid)) {
+    if (LIBXL__DOMAIN_IS_TYPE(&gc,  domid, HVM)) {
         unsigned long pvdriver = 0;
         int ret;
         ret = xc_get_hvm_param(ctx->xch, domid, HVM_PARAM_CALLBACK_IRQ, &pvdriver);
@@ -722,6 +722,7 @@ int libxl_domain_destroy(libxl_ctx *ctx,
     libxl_dominfo dominfo;
     char *dom_path;
     char *vm_path;
+    char *pid;
     int rc, dm_present;
 
     rc = libxl_domain_info(ctx, &dominfo, domid);
@@ -734,12 +735,16 @@ int libxl_domain_destroy(libxl_ctx *ctx,
         return rc;
     }
 
-    if (libxl__domain_is_hvm(&gc, domid)) {
+    switch (libxl__domain_type(&gc, domid)) {
+    case LIBXL_DOMAIN_TYPE_HVM:
         dm_present = 1;
-    } else {
-        char *pid;
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
         pid = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "/local/domain/%d/image/device-model-pid", domid));
         dm_present = (pid != NULL);
+        break;
+    default:
+        abort();
     }
 
     dom_path = libxl__xs_get_dompath(&gc, domid);
@@ -818,10 +823,16 @@ int libxl_primary_console_exec(libxl_ctx
         rc = libxl_console_exec(ctx, stubdomid,
                                 STUBDOM_CONSOLE_SERIAL, LIBXL_CONSOLE_TYPE_PV);
     else {
-        if (libxl__domain_is_hvm(&gc, domid_vm))
+        switch (libxl__domain_type(&gc, domid_vm)) {
+        case LIBXL_DOMAIN_TYPE_HVM:
             rc = libxl_console_exec(ctx, domid_vm, 0, LIBXL_CONSOLE_TYPE_SERIAL);
-        else
+            break;
+        case LIBXL_DOMAIN_TYPE_PV:
             rc = libxl_console_exec(ctx, domid_vm, 0, LIBXL_CONSOLE_TYPE_PV);
+            break;
+        default:
+            abort();
+        }
     }
     libxl__free_all(&gc);
     return rc;
diff -r 3237f9de6c50 -r 8c7190363635 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
@@ -35,7 +35,7 @@
 #include "libxl.h"
 #include "libxl_internal.h"
 
-int libxl__domain_is_hvm(libxl__gc *gc, uint32_t domid)
+libxl_domain_type libxl__domain_type(libxl__gc *gc, uint32_t domid)
 {
     libxl_ctx *ctx = libxl__gc_owner(gc);
     xc_domaininfo_t info;
@@ -46,7 +46,10 @@ int libxl__domain_is_hvm(libxl__gc *gc, 
         return -1;
     if (info.domain != domid)
         return -1;
-    return !!(info.flags & XEN_DOMINF_hvm_guest);
+    if (info.flags & XEN_DOMINF_hvm_guest)
+        return LIBXL_DOMAIN_TYPE_HVM;
+    else
+        return LIBXL_DOMAIN_TYPE_PV;
 }
 
 int libxl__domain_shutdown_reason(libxl__gc *gc, uint32_t domid)
diff -r 3237f9de6c50 -r 8c7190363635 tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_internal.h	Mon Jul 18 09:38:45 2011 +0100
@@ -167,9 +167,10 @@ _hidden char **libxl__xs_directory(libxl
    /* On error: returns NULL, sets errno (no logging) */
 
 /* from xl_dom */
-_hidden int libxl__domain_is_hvm(libxl__gc *gc, uint32_t domid);
+_hidden libxl_domain_type libxl__domain_type(libxl__gc *gc, uint32_t domid);
 _hidden int libxl__domain_shutdown_reason(libxl__gc *gc, uint32_t domid);
-
+#define LIBXL__DOMAIN_IS_TYPE(gc, domid, type) \
+    libxl__domain_type((gc), (domid)) == LIBXL_DOMAIN_TYPE_##type
 typedef struct {
     uint32_t store_port;
     unsigned long store_mfn;
diff -r 3237f9de6c50 -r 8c7190363635 tools/libxl/libxl_pci.c
--- a/tools/libxl/libxl_pci.c	Mon Jul 18 09:38:45 2011 +0100
+++ b/tools/libxl/libxl_pci.c	Mon Jul 18 09:38:45 2011 +0100
@@ -286,7 +286,7 @@ static int libxl__device_pci_add_xenstor
     if (!num_devs)
         return libxl__create_pci_backend(gc, domid, pcidev, 1);
 
-    if (!starting && !libxl__domain_is_hvm(gc, domid)) {
+    if (!starting && LIBXL__DOMAIN_IS_TYPE(gc, domid, PV)) {
         if (libxl__wait_for_backend(gc, be_path, "4") < 0)
             return ERROR_FAIL;
     }
@@ -329,7 +329,7 @@ static int libxl__device_pci_remove_xens
         return ERROR_INVAL;
     num = atoi(num_devs);
 
-    if (!libxl__domain_is_hvm(gc, domid)) {
+    if (LIBXL__DOMAIN_IS_TYPE(gc, domid, PV)) {
         if (libxl__wait_for_backend(gc, be_path, "4") < 0) {
             LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "pci backend at %s is not ready", be_path);
             return ERROR_FAIL;
@@ -357,7 +357,7 @@ retry_transaction:
         if (errno == EAGAIN)
             goto retry_transaction;
 
-    if (!libxl__domain_is_hvm(gc, domid)) {
+    if (LIBXL__DOMAIN_IS_TYPE(gc, domid, PV)) {
         if (libxl__wait_for_backend(gc, be_path, "4") < 0) {
             LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "pci backend at %s is not ready", be_path);
             return ERROR_FAIL;
@@ -604,10 +604,11 @@ static int do_pci_add(libxl__gc *gc, uin
     libxl_ctx *ctx = libxl__gc_owner(gc);
     char *path;
     char *state, *vdevfn;
-    int rc, hvm;
+    int rc, hvm = 0;
 
-    hvm = libxl__domain_is_hvm(gc, domid);
-    if (hvm) {
+    switch (libxl__domain_type(gc, domid)) {
+    case LIBXL_DOMAIN_TYPE_HVM:
+        hvm = 1;
         if (libxl__wait_for_device_model(gc, domid, "running",
                                          NULL, NULL, NULL) < 0) {
             return ERROR_FAIL;
@@ -635,7 +636,9 @@ static int do_pci_add(libxl__gc *gc, uin
         xs_write(ctx->xsh, XBT_NULL, path, state, strlen(state));
         if ( rc )
             return ERROR_FAIL;
-    } else {
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
+    {
         char *sysfs_path = libxl__sprintf(gc, SYSFS_PCI_DEV"/"PCI_BDF"/resource", pcidev->domain,
                                          pcidev->bus, pcidev->dev, pcidev->func);
         FILE *f = fopen(sysfs_path, "r");
@@ -694,6 +697,9 @@ static int do_pci_add(libxl__gc *gc, uin
         }
         fclose(f);
     }
+    default:
+        abort();
+    }
 out:
     if (!libxl_is_stubdom(ctx, domid, NULL)) {
         rc = xc_assign_device(ctx->xch, domid, pcidev_encode_bdf(pcidev));
@@ -831,7 +837,7 @@ static int do_pci_remove(libxl__gc *gc, 
     libxl_device_pci *assigned;
     char *path;
     char *state;
-    int hvm, rc, num;
+    int hvm = 0, rc, num;
     int stubdomid = 0;
 
     if ( !libxl_device_pci_list_assigned(ctx, &assigned, domid, &num) ) {
@@ -842,8 +848,9 @@ static int do_pci_remove(libxl__gc *gc, 
         }
     }
 
-    hvm = libxl__domain_is_hvm(gc, domid);
-    if (hvm) {
+    switch (libxl__domain_type(gc, domid)) {
+    case LIBXL_DOMAIN_TYPE_HVM:
+        hvm = 1;
         if (libxl__wait_for_device_model(gc, domid, "running",
                                          NULL, NULL, NULL) < 0) {
             return ERROR_FAIL;
@@ -871,7 +878,9 @@ static int do_pci_remove(libxl__gc *gc, 
         }
         path = libxl__sprintf(gc, "/local/domain/0/device-model/%d/state", domid);
         xs_write(ctx->xsh, XBT_NULL, path, state, strlen(state));
-    } else {
+        break;
+    case LIBXL_DOMAIN_TYPE_PV:
+    {
         char *sysfs_path = libxl__sprintf(gc, SYSFS_PCI_DEV"/"PCI_BDF"/resource", pcidev->domain,
                                          pcidev->bus, pcidev->dev, pcidev->func);
         FILE *f = fopen(sysfs_path, "r");
@@ -921,6 +930,9 @@ skip1:
         }
         fclose(f);
     }
+    default:
+        abort();
+    }
 out:
     /* don't do multiple resets while some functions are still passed through */
     if ( (pcidev->vdevfn & 0x7) == 0 ) {