| /* | |
| * Details of the "wire" protocol between Xen Store Daemon and client | |
| * library or guest kernel. | |
| * | |
| * SPDX-License-Identifier: MIT | |
| * | |
| * 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, | |
| XS_INVALID = 0xffff /* Guaranteed to remain an invalid type */ | |
| }; | |
| #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 { | |
| INT32 errnum; | |
| const CHAR8 *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 type; /* XS_??? */ | |
| UINT32 req_id; /* Request identifier, echoed in daemon's response. */ | |
| UINT32 tx_id; /* Transaction id (0 if not related to a transaction). */ | |
| UINT32 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 XENSTORE_RING_IDX; | |
| #define MASK_XENSTORE_IDX(idx) ((idx) & (XENSTORE_RING_SIZE-1)) | |
| struct xenstore_domain_interface { | |
| CHAR8 req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */ | |
| CHAR8 rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */ | |
| XENSTORE_RING_IDX req_cons, req_prod; | |
| XENSTORE_RING_IDX rsp_cons, rsp_prod; | |
| UINT32 server_features; /* Bitmap of features supported by the server */ | |
| UINT32 connection; | |
| }; | |
| /* 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 | |
| /* The ability to reconnect a ring */ | |
| #define XENSTORE_SERVER_FEATURE_RECONNECTION 1 | |
| /* Valid values for the connection field */ | |
| #define XENSTORE_CONNECTED 0 /* the steady-state */ | |
| #define XENSTORE_RECONNECT 1 /* guest has initiated a reconnect */ | |
| #endif /* _XS_WIRE_H */ | |
| /* | |
| * Local variables: | |
| * mode: C | |
| * c-file-style: "BSD" | |
| * c-basic-offset: 4 | |
| * tab-width: 4 | |
| * indent-tabs-mode: nil | |
| * End: | |
| */ |