| 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 */ |