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Diffstat (limited to 'drivers/xen/xenbus/xenbus.h')
| -rw-r--r-- | drivers/xen/xenbus/xenbus.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/xen/xenbus/xenbus.h b/drivers/xen/xenbus/xenbus.h new file mode 100644 index 000000000..88516a8a9 --- /dev/null +++ b/drivers/xen/xenbus/xenbus.h @@ -0,0 +1,141 @@ +/* + * Private include for xenbus communications. + * + * Copyright (C) 2005 Rusty Russell, IBM Corporation + * Copyright (C) 2005 XenSource Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _XENBUS_XENBUS_H +#define _XENBUS_XENBUS_H + +#include <linux/mutex.h> +#include <linux/uio.h> +#include <xen/xenbus.h> + +#define XEN_BUS_ID_SIZE 20 + +struct xen_bus_type { + char *root; + unsigned int levels; + int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename); + int (*probe)(struct xen_bus_type *bus, const char *type, + const char *dir); + bool (*otherend_will_handle)(struct xenbus_watch *watch, + const char *path, const char *token); + void (*otherend_changed)(struct xenbus_watch *watch, const char *path, + const char *token); + struct bus_type bus; +}; + +enum xenstore_init { + XS_UNKNOWN, + XS_PV, + XS_HVM, + XS_LOCAL, +}; + +struct xs_watch_event { + struct list_head list; + unsigned int len; + struct xenbus_watch *handle; + const char *path; + const char *token; + char body[]; +}; + +enum xb_req_state { + xb_req_state_queued, + xb_req_state_wait_reply, + xb_req_state_got_reply, + xb_req_state_aborted +}; + +struct xb_req_data { + struct list_head list; + wait_queue_head_t wq; + struct xsd_sockmsg msg; + uint32_t caller_req_id; + enum xsd_sockmsg_type type; + char *body; + const struct kvec *vec; + int num_vecs; + int err; + enum xb_req_state state; + bool user_req; + void (*cb)(struct xb_req_data *); + void *par; +}; + +extern enum xenstore_init xen_store_domain_type; +extern const struct attribute_group *xenbus_dev_groups[]; +extern struct mutex xs_response_mutex; +extern struct list_head xs_reply_list; +extern struct list_head xb_write_list; +extern wait_queue_head_t xb_waitq; +extern struct mutex xb_write_mutex; + +int xs_init(void); +int xb_init_comms(void); +void xb_deinit_comms(void); +int xs_watch_msg(struct xs_watch_event *event); +void xs_request_exit(struct xb_req_data *req); + +int xenbus_match(struct device *_dev, struct device_driver *_drv); +int xenbus_dev_probe(struct device *_dev); +int xenbus_dev_remove(struct device *_dev); +int xenbus_register_driver_common(struct xenbus_driver *drv, + struct xen_bus_type *bus, + struct module *owner, + const char *mod_name); +int xenbus_probe_node(struct xen_bus_type *bus, + const char *type, + const char *nodename); +int xenbus_probe_devices(struct xen_bus_type *bus); + +void xenbus_dev_changed(const char *node, struct xen_bus_type *bus); + +void xenbus_dev_shutdown(struct device *_dev); + +int xenbus_dev_suspend(struct device *dev); +int xenbus_dev_resume(struct device *dev); +int xenbus_dev_cancel(struct device *dev); + +void xenbus_otherend_changed(struct xenbus_watch *watch, + const char *path, const char *token, + int ignore_on_shutdown); + +int xenbus_read_otherend_details(struct xenbus_device *xendev, + char *id_node, char *path_node); + +void xenbus_ring_ops_init(void); + +int xenbus_dev_request_and_reply(struct xsd_sockmsg *msg, void *par); +void xenbus_dev_queue_reply(struct xb_req_data *req); + +extern unsigned int xb_dev_generation_id; + +#endif |