include/hw/xen/xen-bus-helper.h

   1 /*
   2  * Copyright (c) 2018  Citrix Systems Inc.
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #ifndef HW_XEN_BUS_HELPER_H
   9 #define HW_XEN_BUS_HELPER_H
  10
  11 #include "hw/xen/xen_backend_ops.h"
  12
  13 const char *xs_strstate(enum xenbus_state state);
  14
  15 void xs_node_create(struct qemu_xs_handle *h,  xs_transaction_t tid,
  16                     const char *node, unsigned int owner, unsigned int domid,
  17                     unsigned int perms, Error **errp);
  18 void xs_node_destroy(struct qemu_xs_handle *h,  xs_transaction_t tid,
  19                      const char *node, Error **errp);
  20
  21 /* Write to node/key unless node is empty, in which case write to key */
  22 void xs_node_vprintf(struct qemu_xs_handle *h,  xs_transaction_t tid,
  23                      const char *node, const char *key, Error **errp,
  24                      const char *fmt, va_list ap)
  25     G_GNUC_PRINTF(6, 0);
  26 void xs_node_printf(struct qemu_xs_handle *h,  xs_transaction_t tid,
  27                     const char *node, const char *key, Error **errp,
  28                     const char *fmt, ...)
  29     G_GNUC_PRINTF(6, 7);
  30
  31 /* Read from node/key unless node is empty, in which case read from key */
  32 int xs_node_vscanf(struct qemu_xs_handle *h,  xs_transaction_t tid,
  33                    const char *node, const char *key, Error **errp,
  34                    const char *fmt, va_list ap)
  35     G_GNUC_SCANF(6, 0);
  36 int xs_node_scanf(struct qemu_xs_handle *h,  xs_transaction_t tid,
  37                   const char *node, const char *key, Error **errp,
  38                   const char *fmt, ...)
  39     G_GNUC_SCANF(6, 7);
  40
  41 /* Watch node/key unless node is empty, in which case watch key */
  42 struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
  43                                     const char *key, xs_watch_fn fn,
  44                                     void *opaque, Error **errp);
  45 void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w);
  46
  47 #endif /* HW_XEN_BUS_HELPER_H */