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 /* 42 * Unlike other functions here, the printf-formatted path_fmt is for 43 * the XenStore path, not the contents of the node. 44 */ 45 char *xs_node_read(struct qemu_xs_handle *h, xs_transaction_t tid, 46 unsigned int *len, Error **errp, 47 const char *path_fmt, ...) 48 G_GNUC_PRINTF(5, 6); 49 50 /* Watch node/key unless node is empty, in which case watch key */ 51 struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node, 52 const char *key, xs_watch_fn fn, 53 void *opaque, Error **errp); 54 void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w); 55 56 #endif /* HW_XEN_BUS_HELPER_H */ 57