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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License, Version 1.0 only
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6 * (the "License"). You may not use this file except in compliance
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7 * with the License.
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8 *
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9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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10 * or http://www.opensolaris.org/os/licensing.
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11 * See the License for the specific language governing permissions
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12 * and limitations under the License.
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13 *
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14 * When distributing Covered Code, include this CDDL HEADER in each
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15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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16 * If applicable, add the following below this CDDL HEADER, with the
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17 * fields enclosed by brackets "[]" replaced with your own identifying
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18 * information: Portions Copyright [yyyy] [name of copyright owner]
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19 *
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20 * CDDL HEADER END
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21 */
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22 /*
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23 * Copyright (c) 2000 by Sun Microsystems, Inc.
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24 * All rights reserved.
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25 */
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26
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27 #ifndef DSVCD_DSVCLOCKD_H
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28 #define DSVCD_DSVCLOCKD_H
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29
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30 #pragma ident "@(#)dsvclockd.h 1.2 05/06/08 SMI"
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31
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32 #include <sys/param.h>
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33 #include <sys/types.h>
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34
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35 /*
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36 * Data structures and constants that are shared between dsvclockd and
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37 * libdhcpsvc. This protocol is project-private and is thus subject to
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38 * change at any time.
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39 */
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40
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41 #ifdef __cplusplus
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42 extern "C" {
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43 #endif
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44
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45 #define DSVCD_DOOR_VERSION 1 /* current protocol version */
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46 #define DSVCD_PATH "/usr/lib/inet/dsvclockd"
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47 #define DSVCD_DOOR_FMT "/var/run/dsvclockd_%s_door"
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48
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49 typedef enum { DSVCD_LOCK, DSVCD_UNLOCK } dsvcd_reqtype_t;
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50 typedef enum { DSVCD_NOLOCK, DSVCD_RDLOCK, DSVCD_WRLOCK } dsvcd_locktype_t;
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51
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52 typedef struct {
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53 uint8_t rq_version; /* version of the API */
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54 dsvcd_reqtype_t rq_reqtype; /* request type */
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55 } dsvcd_request_t;
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56
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57 typedef struct {
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58 uint8_t rp_version; /* version of the API */
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59 int32_t rp_retval; /* DSVC_* return value */
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60 } dsvcd_reply_t;
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61
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62 typedef struct {
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63 dsvcd_request_t lrq_request; /* generic request header */
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64 dsvcd_locktype_t lrq_locktype; /* reader or writer */
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65 uint8_t lrq_nonblock; /* cannot block if true */
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66 uint8_t lrq_crosshost; /* do cross-host synch */
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67
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68 /*
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69 * The caller filling in this request must provide their current
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70 * container version and a name for their container which is
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71 * per-datastore unique (but need not be unique across datastores
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72 * or different versions of the same container.)
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73 *
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74 * The `lrq_loctoken' field must contain a token which "names" a
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75 * given location where the container exists -- note that a given
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76 * location must have exactly one name, though it's permissible for
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77 * more than one location to have the same name (in this case,
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78 * containers from these locations will be synchronized with one
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79 * another, which will hamper performance). Note that standard
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80 * pathnames do not meet the first constraint (e.g., /var/dhcp and
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81 * /var/../var/dhcp are two different names for the same location),
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82 * but pathnames processed by realpath(3C) do.
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83 *
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84 * If the caller wants cross-host synchronization, then
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85 * `lrq_crosshost' must be set and `lrq_loctoken' must be a
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86 * realpath(3C)'d directory that all hosts can access.
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87 */
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88 int lrq_conver;
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89 char lrq_conname[64];
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90 char lrq_loctoken[MAXPATHLEN];
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91 } dsvcd_lock_request_t;
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92
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93 typedef struct {
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94 dsvcd_request_t urq_request; /* generic request header */
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95 } dsvcd_unlock_request_t;
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96
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97 #ifdef __cplusplus
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98 }
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99 #endif
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100
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101 #endif /* DSVCD_DSVCLOCKD_H */
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