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https://github.com/xen-project/xen.git
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Julien Grall
98108eaee8
xen-init-dom0 is a standalone binary, so all the functions but the main() should be static. Signed-off-by: Julien Grall <jgrall@amazon.com> Cc: paul@xen.org Acked-by: Wei Liu <wl@xen.org>
134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include <xenctrl.h>
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#include <xenstore.h>
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#include <libxl.h>
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#include "init-dom-json.h"
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#define DOMNAME_PATH "/local/domain/0/name"
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#define DOMID_PATH "/local/domain/0/domid"
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static int clear_domid_history(void)
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{
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int rc = 1;
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xentoollog_logger_stdiostream *logger;
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libxl_ctx *ctx;
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logger = xtl_createlogger_stdiostream(stderr, XTL_ERROR, 0);
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if (!logger)
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return 1;
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if (libxl_ctx_alloc(&ctx, LIBXL_VERSION, 0,
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(xentoollog_logger *)logger)) {
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fprintf(stderr, "cannot init libxl context\n");
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goto outlog;
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}
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if (!libxl_clear_domid_history(ctx))
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rc = 0;
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libxl_ctx_free(ctx);
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outlog:
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xtl_logger_destroy((xentoollog_logger *)logger);
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return rc;
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}
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int main(int argc, char **argv)
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{
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int rc;
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struct xs_handle *xsh = NULL;
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xc_interface *xch = NULL;
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char *domname_string = NULL, *domid_string = NULL;
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libxl_uuid uuid;
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/* Accept 0 or 1 argument */
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if (argc > 2) {
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fprintf(stderr, "too many arguments\n");
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rc = 1;
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goto out;
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}
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xsh = xs_open(0);
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if (!xsh) {
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perror("cannot open xenstore connection");
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rc = 1;
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goto out;
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}
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xch = xc_interface_open(NULL, NULL, 0);
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if (!xch) {
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perror("xc_interface_open() failed");
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rc = 1;
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goto out;
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}
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/* Sanity check: this program can only be run once. */
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domid_string = xs_read(xsh, XBT_NULL, DOMID_PATH, NULL);
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domname_string = xs_read(xsh, XBT_NULL, DOMNAME_PATH, NULL);
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if (domid_string && domname_string) {
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fprintf(stderr, "Dom0 is already set up\n");
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rc = 0;
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goto out;
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}
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libxl_uuid_clear(&uuid);
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/* If UUID is supplied, parse it. */
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if (argc == 2 && libxl_uuid_from_string(&uuid, argv[1])) {
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fprintf(stderr, "failed to parse UUID %s\n", argv[1]);
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rc = 1;
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goto out;
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}
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if (!libxl_uuid_is_nil(&uuid) &&
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xc_domain_sethandle(xch, 0, libxl_uuid_bytearray(&uuid))) {
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perror("failed to set Dom0 UUID");
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rc = 1;
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goto out;
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}
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rc = gen_stub_json_config(0, &uuid);
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if (rc)
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goto out;
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rc = clear_domid_history();
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if (rc)
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goto out;
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/* Write xenstore entries. */
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if (!xs_write(xsh, XBT_NULL, DOMID_PATH, "0", strlen("0"))) {
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fprintf(stderr, "cannot set domid for Dom0\n");
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rc = 1;
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goto out;
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}
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if (!xs_write(xsh, XBT_NULL, DOMNAME_PATH, "Domain-0",
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strlen("Domain-0"))) {
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fprintf(stderr, "cannot set domain name for Dom0\n");
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rc = 1;
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goto out;
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}
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printf("Done setting up Dom0\n");
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out:
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free(domid_string);
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free(domname_string);
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xs_close(xsh);
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xc_interface_close(xch);
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return rc;
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}
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/*
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* Local variables:
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* mode: C
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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