139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
|
/*
|
||
|
|
* Details of the "wire" protocol between Xen Store Daemon and client
|
||
|
|
* library or guest kernel.
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
* of this software and associated documentation files (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.
|
||
|
|
*
|
||
|
|
* 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;
|
||
|
|
};
|
||
|
|
#ifdef EINVAL
|
||
|
|
#define XSD_ERROR(x) { x, #x }
|
||
|
|
/* LINTED: static unused */
|
||
|
|
static struct xsd_errors xsd_errors[]
|
||
|
|
#if defined(__GNUC__)
|
||
|
|
__attribute__((unused))
|
||
|
|
#endif
|
||
|
|
= {
|
||
|
|
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),
|
||
|
|
XSD_ERROR(E2BIG)
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
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
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* `incontents 150 xenstore_struct XenStore wire protocol.
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
|
||
|
|
/* Violating these just gets you an error back */
|
||
|
|
#define XENSTORE_ABS_PATH_MAX 3072
|
||
|
|
#define XENSTORE_REL_PATH_MAX 2048
|
||
|
|
|
||
|
|
#endif /* _XS_WIRE_H */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Local variables:
|
||
|
|
* mode: C
|
||
|
|
* c-file-style: "BSD"
|
||
|
|
* c-basic-offset: 4
|
||
|
|
* tab-width: 4
|
||
|
|
* indent-tabs-mode: nil
|
||
|
|
* End:
|
||
|
|
*/
|