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| /* SPDX-License-Identifier: GPL-2.0 */
| /*
| * Details of the "wire" protocol between Xen Store Daemon and client
| * library or guest kernel.
| * Copyright (C) 2005 Rusty Russell IBM Corporation
| */
|
| #ifndef _XS_WIRE_H
| #define _XS_WIRE_H
|
| enum xsd_sockmsg_type
| {
| XS_DEBUG,
| XS_DIRECTORY,
| XS_READ,
| XS_GET_PERMS,
| XS_WATCH,
| XS_UNWATCH,
| XS_TRANSACTION_START,
| XS_TRANSACTION_END,
| XS_INTRODUCE,
| XS_RELEASE,
| XS_GET_DOMAIN_PATH,
| XS_WRITE,
| XS_MKDIR,
| XS_RM,
| XS_SET_PERMS,
| XS_WATCH_EVENT,
| XS_ERROR,
| XS_IS_DOMAIN_INTRODUCED,
| XS_RESUME,
| XS_SET_TARGET,
| XS_RESTRICT,
| XS_RESET_WATCHES,
| };
|
| #define XS_WRITE_NONE "NONE"
| #define XS_WRITE_CREATE "CREATE"
| #define XS_WRITE_CREATE_EXCL "CREATE|EXCL"
|
| /* We hand errors as strings, for portability. */
| struct xsd_errors
| {
| int errnum;
| const char *errstring;
| };
| #define XSD_ERROR(x) { x, #x }
| static struct xsd_errors xsd_errors[] __attribute__((unused)) = {
| XSD_ERROR(EINVAL),
| XSD_ERROR(EACCES),
| XSD_ERROR(EEXIST),
| XSD_ERROR(EISDIR),
| XSD_ERROR(ENOENT),
| XSD_ERROR(ENOMEM),
| XSD_ERROR(ENOSPC),
| XSD_ERROR(EIO),
| XSD_ERROR(ENOTEMPTY),
| XSD_ERROR(ENOSYS),
| XSD_ERROR(EROFS),
| XSD_ERROR(EBUSY),
| XSD_ERROR(EAGAIN),
| XSD_ERROR(EISCONN)
| };
|
| struct xsd_sockmsg
| {
| uint32_t type; /* XS_??? */
| uint32_t req_id;/* Request identifier, echoed in daemon's response. */
| uint32_t tx_id; /* Transaction id (0 if not related to a transaction). */
| uint32_t len; /* Length of data following this. */
|
| /* Generally followed by nul-terminated string(s). */
| };
|
| enum xs_watch_type
| {
| XS_WATCH_PATH = 0,
| XS_WATCH_TOKEN
| };
|
| /* Inter-domain shared memory communications. */
| #define XENSTORE_RING_SIZE 1024
| typedef uint32_t XENSTORE_RING_IDX;
| #define MASK_XENSTORE_IDX(idx) ((idx) & (XENSTORE_RING_SIZE-1))
| struct xenstore_domain_interface {
| char req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */
| char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */
| XENSTORE_RING_IDX req_cons, req_prod;
| XENSTORE_RING_IDX rsp_cons, rsp_prod;
| };
|
| /* Violating this is very bad. See docs/misc/xenstore.txt. */
| #define XENSTORE_PAYLOAD_MAX 4096
|
| #endif /* _XS_WIRE_H */
|
|
