diff options
Diffstat (limited to 'src/include/xen/io/xs_wire.h')
| -rw-r--r-- | src/include/xen/io/xs_wire.h | 55 |
1 files changed, 32 insertions, 23 deletions
diff --git a/src/include/xen/io/xs_wire.h b/src/include/xen/io/xs_wire.h index 50415f02f..cffd75cde 100644 --- a/src/include/xen/io/xs_wire.h +++ b/src/include/xen/io/xs_wire.h @@ -1,25 +1,8 @@ +/* SPDX-License-Identifier: MIT */ /* * 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 */ @@ -30,7 +13,8 @@ FILE_LICENCE ( MIT ); enum xsd_sockmsg_type { - XS_DEBUG, + XS_CONTROL, +#define XS_DEBUG XS_CONTROL XS_DIRECTORY, XS_READ, XS_GET_PERMS, @@ -50,8 +34,13 @@ enum xsd_sockmsg_type XS_IS_DOMAIN_INTRODUCED, XS_RESUME, XS_SET_TARGET, - XS_RESTRICT, - XS_RESET_WATCHES + /* XS_RESTRICT has been removed */ + XS_RESET_WATCHES = XS_SET_TARGET + 2, + XS_DIRECTORY_PART, + + XS_TYPE_COUNT, /* Number of valid types. */ + + XS_INVALID = 0xffff /* Guaranteed to remain an invalid type */ }; #define XS_WRITE_NONE "NONE" @@ -67,11 +56,12 @@ struct xsd_errors #ifdef EINVAL #define XSD_ERROR(x) { x, #x } /* LINTED: static unused */ -static struct xsd_errors xsd_errors[] +static const struct xsd_errors xsd_errors[] #if defined(__GNUC__) __attribute__((unused)) #endif = { + /* /!\ New errors should be added at the end of the array. */ XSD_ERROR(EINVAL), XSD_ERROR(EACCES), XSD_ERROR(EEXIST), @@ -86,7 +76,8 @@ __attribute__((unused)) XSD_ERROR(EBUSY), XSD_ERROR(EAGAIN), XSD_ERROR(EISCONN), - XSD_ERROR(E2BIG) + XSD_ERROR(E2BIG), + XSD_ERROR(EPERM), }; #endif @@ -118,6 +109,9 @@ struct xenstore_domain_interface { char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */ XENSTORE_RING_IDX req_cons, req_prod; XENSTORE_RING_IDX rsp_cons, rsp_prod; + uint32_t server_features; /* Bitmap of features supported by the server */ + uint32_t connection; + uint32_t error; }; /* Violating this is very bad. See docs/misc/xenstore.txt. */ @@ -127,6 +121,21 @@ struct xenstore_domain_interface { #define XENSTORE_ABS_PATH_MAX 3072 #define XENSTORE_REL_PATH_MAX 2048 +/* The ability to reconnect a ring */ +#define XENSTORE_SERVER_FEATURE_RECONNECTION 1 +/* The presence of the "error" field in the ring page */ +#define XENSTORE_SERVER_FEATURE_ERROR 2 + +/* Valid values for the connection field */ +#define XENSTORE_CONNECTED 0 /* the steady-state */ +#define XENSTORE_RECONNECT 1 /* reconnect in progress */ + +/* Valid values for the error field */ +#define XENSTORE_ERROR_NONE 0 /* No error */ +#define XENSTORE_ERROR_COMM 1 /* Communication problem */ +#define XENSTORE_ERROR_RINGIDX 2 /* Invalid ring index */ +#define XENSTORE_ERROR_PROTO 3 /* Protocol violation (payload too long) */ + #endif /* _XS_WIRE_H */ /* |