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+/*
+ * Copyright (C) 2006 Samuel Thibault <samuel.thibault@ens-lyon.org>
+ *
+ * This program is free software ; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation ; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY ; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the program ; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef XEN_STORE_H
+#define XEN_STORE_H
+#include <machine/xen.h>
+#include <xen/public/io/xenbus.h>
+
+typedef unsigned32_t hyp_store_transaction_t;
+
+#define hyp_store_state_unknown "0"
+#define hyp_store_state_initializing "1"
+#define hyp_store_state_init_wait "2"
+#define hyp_store_state_initialized "3"
+#define hyp_store_state_connected "4"
+#define hyp_store_state_closing "5"
+#define hyp_store_state_closed "6"
+
+void hyp_store_init(void);
+
+extern const char *hyp_store_error;
+
+/* Start a transaction. */
+hyp_store_transaction_t hyp_store_transaction_start(void);
+/* Stop a transaction. Returns 1 if the transactions succeeded, 0 else. */
+int hyp_store_transaction_stop(hyp_store_transaction_t t);
+
+/* List a directory: returns an array to file names, terminated by NULL. Free
+ * with kfree. */
+char **hyp_store_ls(hyp_store_transaction_t t, int n, ...);
+
+/* Get the value of an entry. Free with kfree. */
+void *hyp_store_read(hyp_store_transaction_t t, int n, ...);
+/* Get the integer value of an entry, -1 on error. */
+int hyp_store_read_int(hyp_store_transaction_t t, int n, ...);
+/* Set the value of an entry. */
+char *hyp_store_write(hyp_store_transaction_t t, const char *data, int n, ...);
+
+#endif /* XEN_STORE_H */