xref: /openbmc/qemu/include/hw/xen/xen-bus-helper.h (revision 520e210c)
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_common.h"
12 
13 const char *xs_strstate(enum xenbus_state state);
14 
15 void xs_node_create(struct xs_handle *xsh,  xs_transaction_t tid,
16                     const char *node, struct xs_permissions perms[],
17                     unsigned int nr_perms, Error **errp);
18 void xs_node_destroy(struct xs_handle *xsh,  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 xs_handle *xsh,  xs_transaction_t tid,
23                      const char *node, const char *key, Error **errp,
24                      const char *fmt, va_list ap)
25     GCC_FMT_ATTR(6, 0);
26 void xs_node_printf(struct xs_handle *xsh,  xs_transaction_t tid,
27                     const char *node, const char *key, Error **errp,
28                     const char *fmt, ...)
29     GCC_FMT_ATTR(6, 7);
30 
31 /* Read from node/key unless node is empty, in which case read from key */
32 int xs_node_vscanf(struct xs_handle *xsh,  xs_transaction_t tid,
33                    const char *node, const char *key, Error **errp,
34                    const char *fmt, va_list ap);
35 int xs_node_scanf(struct xs_handle *xsh,  xs_transaction_t tid,
36                   const char *node, const char *key, Error **errp,
37                   const char *fmt, ...);
38 
39 /* Watch node/key unless node is empty, in which case watch key */
40 void xs_node_watch(struct xs_handle *xsh, const char *node, const char *key,
41                    char *token, Error **errp);
42 void xs_node_unwatch(struct xs_handle *xsh, const char *node, const char *key,
43                      const char *token, Error **errp);
44 
45 #endif /* HW_XEN_BUS_HELPER_H */
46