2 * Details of the "wire" protocol between Xen Store Daemon and client
3 * library or guest kernel.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
23 * Copyright (C) 2005 Rusty Russell IBM Corporation
48 XS_IS_DOMAIN_INTRODUCED,
53 #define XS_WRITE_NONE "NONE"
54 #define XS_WRITE_CREATE "CREATE"
55 #define XS_WRITE_CREATE_EXCL "CREATE|EXCL"
57 /* We hand errors as strings, for portability. */
61 const char *errstring;
63 #define XSD_ERROR(x) { x, #x }
64 /* LINTED: static unused */
65 static struct xsd_errors xsd_errors[]
67 __attribute__((unused))
88 uint32_t type; /* XS_??? */
89 uint32_t req_id;/* Request identifier, echoed in daemon's response. */
90 uint32_t tx_id; /* Transaction id (0 if not related to a transaction). */
91 uint32_t len; /* Length of data following this. */
93 /* Generally followed by nul-terminated string(s). */
102 /* Inter-domain shared memory communications. */
103 #define XENSTORE_RING_SIZE 1024
104 typedef uint32_t XENSTORE_RING_IDX;
105 #define MASK_XENSTORE_IDX(idx) ((idx) & (XENSTORE_RING_SIZE-1))
106 struct xenstore_domain_interface {
107 char req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */
108 char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */
109 XENSTORE_RING_IDX req_cons, req_prod;
110 XENSTORE_RING_IDX rsp_cons, rsp_prod;
113 /* Violating this is very bad. See docs/misc/xenstore.txt. */
114 #define XENSTORE_PAYLOAD_MAX 4096
116 /* Violating these just gets you an error back */
117 #define XENSTORE_ABS_PATH_MAX 3072
118 #define XENSTORE_REL_PATH_MAX 2048
120 #endif /* _XS_WIRE_H */
128 * indent-tabs-mode: nil