94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
|
/*
|
||
|
|
* 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
|
||
|
|
};
|
||
|
|
|
||
|
|
#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 */
|