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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 11/14] tools: split up xen-init-dom0.c
Split up tools/helpers/xen-init-dom0.c in order to prepare reusing
generation of the json configuration by init-xenstore-domain.c.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
tools/helpers/Makefile | 2 +-
tools/helpers/init-dom-json.c | 59 ++++++++++++++++++++++++++++++++++
tools/helpers/init-dom-json.h | 18 +++++++++++
tools/helpers/xen-init-dom0.c | 73 ++++++-------------------------------------
4 files changed, 88 insertions(+), 64 deletions(-)
create mode 100644 tools/helpers/init-dom-json.c
create mode 100644 tools/helpers/init-dom-json.h
diff --git a/tools/helpers/Makefile b/tools/helpers/Makefile
index 826e0ed..0325ba2 100644
--- a/tools/helpers/Makefile
+++ b/tools/helpers/Makefile
@@ -10,7 +10,7 @@ ifeq ($(CONFIG_Linux),y)
PROGS += init-xenstore-domain
endif
-XEN_INIT_DOM0_OBJS = xen-init-dom0.o
+XEN_INIT_DOM0_OBJS = xen-init-dom0.o init-dom-json.o
$(XEN_INIT_DOM0_OBJS): CFLAGS += $(CFLAGS_libxentoollog)
$(XEN_INIT_DOM0_OBJS): CFLAGS += $(CFLAGS_libxenstore)
$(XEN_INIT_DOM0_OBJS): CFLAGS += $(CFLAGS_libxenlight)
diff --git a/tools/helpers/init-dom-json.c b/tools/helpers/init-dom-json.c
new file mode 100644
index 0000000..91b1fdf
--- /dev/null
+++ b/tools/helpers/init-dom-json.c
@@ -0,0 +1,59 @@
+#include <err.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <xenctrl.h>
+#include <libxl.h>
+
+int gen_stub_json_config(uint32_t domid)
+{
+ int rc = 1;
+ xentoollog_logger_stdiostream *logger;
+ libxl_ctx *ctx;
+ libxl_domain_config dom_config;
+ char *json = NULL;
+
+ logger = xtl_createlogger_stdiostream(stderr, XTL_ERROR, 0);
+ if (!logger)
+ return 1;
+
+ if (libxl_ctx_alloc(&ctx, LIBXL_VERSION, 0,
+ (xentoollog_logger *)logger)) {
+ fprintf(stderr, "cannot init libxl context\n");
+ goto outlog;
+ }
+
+ libxl_domain_config_init(&dom_config);
+
+ /* Generate stub JSON config. */
+ dom_config.c_info.type = LIBXL_DOMAIN_TYPE_PV;
+ libxl_domain_build_info_init_type(&dom_config.b_info,
+ LIBXL_DOMAIN_TYPE_PV);
+
+ json = libxl_domain_config_to_json(ctx, &dom_config);
+ /* libxl-json format requires the string ends with '\0'. Code
+ * snippet taken from libxl.
+ */
+ rc = libxl_userdata_store(ctx, domid, "libxl-json",
+ (const uint8_t *)json,
+ strlen(json) + 1 /* include '\0' */);
+ if (rc)
+ fprintf(stderr, "cannot store stub json config for domain %u\n",
domid);
+
+ libxl_domain_config_dispose(&dom_config);
+ free(json);
+ libxl_ctx_free(ctx);
+outlog:
+ xtl_logger_destroy((xentoollog_logger *)logger);
+ return rc;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/tools/helpers/init-dom-json.h b/tools/helpers/init-dom-json.h
new file mode 100644
index 0000000..58c85df
--- /dev/null
+++ b/tools/helpers/init-dom-json.h
@@ -0,0 +1,18 @@
+#ifndef __INIT_DOM_JSON_H
+#define __INIT_DOM_JSON_H
+
+/*
+ * Generate a stub JSON config for a domain with the given domid.
+ */
+int gen_stub_json_config(uint32_t domid);
+
+#endif
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/tools/helpers/xen-init-dom0.c b/tools/helpers/xen-init-dom0.c
index 2f7aa7c..9ab8468 100644
--- a/tools/helpers/xen-init-dom0.c
+++ b/tools/helpers/xen-init-dom0.c
@@ -1,65 +1,26 @@
-#include <err.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
-#include <xentoollog.h>
#include <xenstore.h>
-#include <libxl.h>
+
+#include "init-dom-json.h"
#define DOMNAME_PATH "/local/domain/0/name"
#define DOMID_PATH "/local/domain/0/domid"
-static libxl_ctx *ctx;
-static xentoollog_logger_stdiostream *logger;
-static struct xs_handle *xsh;
-
-static void ctx_alloc(void)
+int main(int argc, char **argv)
{
- if (libxl_ctx_alloc(&ctx, LIBXL_VERSION, 0,
- (xentoollog_logger *)logger)) {
- fprintf(stderr, "cannot init libxl context\n");
- exit(1);
- }
+ int rc;
+ struct xs_handle *xsh;
+ char *domname_string = NULL, *domid_string = NULL;
+
xsh = xs_open(0);
if (!xsh) {
fprintf(stderr, "cannot open xenstore connection\n");
exit(1);
}
-}
-
-static void ctx_free(void)
-{
- if (ctx) {
- libxl_ctx_free(ctx);
- ctx = NULL;
- }
- if (logger) {
- xtl_logger_destroy((xentoollog_logger *)logger);
- logger = NULL;
- }
- if (xsh) {
- xs_close(xsh);
- xsh = NULL;
- }
-}
-
-int main(int argc, char **argv)
-{
- int rc;
- libxl_domain_config dom0_config;
- char *domname_string = NULL, *domid_string = NULL;
- char *json = NULL;;
-
- logger = xtl_createlogger_stdiostream(stderr, XTL_ERROR, 0);
- if (!logger) exit(1);
-
- atexit(ctx_free);
-
- ctx_alloc();
-
- libxl_domain_config_init(&dom0_config);
/* Sanity check: this program can only be run once. */
domid_string = xs_read(xsh, XBT_NULL, DOMID_PATH, NULL);
@@ -70,22 +31,9 @@ int main(int argc, char **argv)
goto out;
}
- /* Generate stub JSON config. */
- dom0_config.c_info.type = LIBXL_DOMAIN_TYPE_PV;
- libxl_domain_build_info_init_type(&dom0_config.b_info,
- LIBXL_DOMAIN_TYPE_PV);
-
- json = libxl_domain_config_to_json(ctx, &dom0_config);
- /* libxl-json format requires the string ends with '\0'. Code
- * snippet taken from libxl.
- */
- rc = libxl_userdata_store(ctx, 0, "libxl-json",
- (const uint8_t *)json,
- strlen(json) + 1 /* include '\0' */);
- if (rc) {
- fprintf(stderr, "cannot store stub json config for Dom0\n");
+ rc = gen_stub_json_config(0);
+ if (rc)
goto out;
- }
/* Write xenstore entries. */
if (!xs_write(xsh, XBT_NULL, DOMID_PATH, "0", strlen("0"))) {
@@ -104,10 +52,9 @@ int main(int argc, char **argv)
printf("Done setting up Dom0\n");
out:
- libxl_domain_config_dispose(&dom0_config);
free(domid_string);
free(domname_string);
- free(json);
+ xs_close(xsh);
return rc;
}
--
2.6.2
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