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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 /*
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24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
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25 * Use is subject to license terms.
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26 */
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27
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28 #ifndef _MHD_LOCAL_H
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29 #define _MHD_LOCAL_H
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30
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31 #pragma ident "@(#)mhd_local.h 2.4 05/06/29 SMI"
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32
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33 #include <stdio.h>
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34 #include <stdlib.h>
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35 #include <fcntl.h>
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36 #include <errno.h>
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37 #include <string.h>
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38 #include <unistd.h>
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39 #include <assert.h>
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40 #include <stdarg.h>
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41 #include <ctype.h>
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42 #include <sys/types.h>
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43 #include <sys/stat.h>
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44 #include <sys/sysmacros.h>
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45 #include <sys/mkdev.h>
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46 #include <sys/time.h>
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47 #include <sys/dkio.h>
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48 #include <sys/vtoc.h>
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49
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50 #include <metamhd.h>
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51 #include <thread.h>
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52
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53 #ifdef __cplusplus
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54 extern "C" {
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55 #endif
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56
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57 /*
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58 * millisecond time
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59 */
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60 typedef u_longlong_t mhd_msec_t;
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61
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62 /*
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63 * drive record
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64 */
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65 typedef uint_t mhd_state_t;
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66 #define DRIVE_IDLE 0x0000 /* exclusive state */
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67 #define DRIVE_ERRORED 0x0001 /* exclusive state */
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68 #define DRIVE_IDLING 0x0002 /* exclusive state */
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69 #define DRIVE_RESERVING 0x0004 /* exclusive state */
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70 #define DRIVE_FAILFASTING 0x0008 /* exclusive state */
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71 #define DRIVE_RELEASING 0x0010 /* exclusive state */
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72 #define DRIVE_EXCLUSIVE_STATES 0x00ff /* all exclusive states */
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73 #define DRIVE_PROBING 0x0100
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74 #define DRIVE_STATUSING 0x0200
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75 #define DRIVE_SERIALING 0x0400
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76 #define DRIVE_VTOCING 0x0800
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77 #define DRIVE_CINFOING 0x1000
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78 #define DRIVE_IDENTING (DRIVE_SERIALING | DRIVE_VTOCING | \
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79 DRIVE_CINFOING)
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80 #define DRIVE_IS_IDLE(dp) (((dp)->dr_state == DRIVE_IDLE) || \
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81 ((dp)->dr_state == DRIVE_ERRORED))
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82 typedef struct mhd_drive {
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83 struct mhd_drive_set *dr_sp; /* back pointer to set */
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84 char *dr_rname; /* raw device name */
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85 char *dr_rname0; /* slice 0 raw device name */
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86 cond_t dr_cv; /* synchronization */
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87 thread_t dr_thread; /* daemon thread */
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88 int dr_fd; /* open slice 0 */
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89 mhd_state_t dr_state; /* drive state */
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90 int dr_errnum; /* errno for DRIVE_ERRORED */
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91 mhd_msec_t dr_time; /* last successful probe time */
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92 mhd_drive_id_t dr_drive_id; /* unique drive identifier */
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93 } mhd_drive_t;
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94
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95 /*
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96 * drive list
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97 */
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98 typedef struct mhd_drive_list {
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99 mhd_drive_t **dl_drives; /* allocated list */
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100 size_t dl_alloc; /* amount allocated */
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101 size_t dl_ndrive; /* amount used */
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102 } mhd_drive_list_t;
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103 #define MHD_NULL_LIST { NULL, 0, 0 }
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104
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105 /*
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106 * drive set
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107 */
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108 typedef struct mhd_drive_set {
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109 char *sr_name; /* set name */
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110 mutex_t sr_mx; /* set mutex */
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111 cond_t sr_cv; /* synchronization */
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112 mhd_opts_t sr_options; /* common options */
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113 mhd_mhiargs_t sr_timeouts; /* reservation timeouts */
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114 mhd_ff_mode_t sr_ff_mode; /* failfast mode */
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115 int sr_ff; /* failfast device descriptor */
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116 mhd_drive_list_t sr_drives; /* drives in set */
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117 } mhd_drive_set_t;
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118
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119 /*
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120 * debug stuff
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121 */
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122 #define MHD_DEBUG 0
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123 #ifdef MHD_DEBUG
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124 extern int mhd_debug;
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125 #define MHDPRINTF(n) if (mhd_debug > 0) mhd_eprintf n
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126 #define MHDPRINTF1(n) if (mhd_debug > 1) mhd_eprintf n
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127 #define MHDPRINTF2(n) if (mhd_debug > 2) mhd_eprintf n
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128 #else /* ! MHD_DEBUG */
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129 #define MHDPRINTF(n)
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130 #define MHDPRINTF1(n)
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131 #define MHDPRINTF2(n)
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132 #endif /* ! MHD_DEBUG */
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133
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134 /*
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135 * extern functions
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136 */
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137 /* mhd_drive.c */
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138 extern const mhd_drive_list_t mhd_null_list;
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139 extern void mhd_add_drive(mhd_drive_list_t *dlp, mhd_drive_t *dp);
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140 extern void mhd_del_drive(mhd_drive_list_t *dlp, mhd_drive_t *dp);
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141 extern void mhd_free_list(mhd_drive_list_t *dlp);
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142 extern int mhd_state(mhd_drive_t *dp, mhd_state_t new_state,
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143 mhd_error_t *mhep);
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144 extern int mhd_state_set(mhd_drive_t *dp, mhd_state_t new_state,
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145 mhd_error_t *mhep);
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146 extern int mhd_idle(mhd_drive_t *dp, mhd_error_t *mhep);
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147 extern mhd_drive_t *mhd_create_drive(mhd_drive_set_t *defaultsp,
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148 char *rname, int *fdp, mhd_error_t *mhep);
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149 extern int mhd_create_drives(char *path, mhd_error_t *mhep);
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150
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151 /* mhd_error.c */
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152 extern void mhd_clrerror(mhd_error_t *mhep);
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153 extern int mhd_error(mhd_error_t *mhep, int errnum, char *name);
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154 /*PRINTFLIKE2*/
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155 extern void mhde_perror(mhd_error_t *mhep, const char *fmt, ...);
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156 /*PRINTFLIKE1*/
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157 extern void mhd_perror(const char *fmt, ...);
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158 /*PRINTFLIKE1*/
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159 extern void mhd_eprintf(const char *fmt, ...);
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160
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161 /* mhd_failfast.c */
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162 extern int mhd_ff_disarm(mhd_drive_set_t *sp, mhd_error_t *mhep);
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163 extern int mhd_ff_open(mhd_drive_set_t *sp, mhd_error_t *mhep);
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164 extern int mhd_ff_close(mhd_drive_set_t *sp, mhd_error_t *mhep);
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165 extern int mhd_ff_rearm(mhd_drive_set_t *sp, mhd_error_t *mhep);
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166 extern void mhd_ff_die(mhd_drive_set_t *sp);
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167 extern void mhd_ff_check(mhd_drive_set_t *sp);
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168
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169 /* mhd_init.c */
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170 extern void mhd_exit(int eval);
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171 extern int mhd_init(struct svc_req *rqstp, int amode,
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172 mhd_error_t *mhep);
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173
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174 /* mhd_ioctl.c */
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175 extern int tk_own(mhd_set_t *mhsp, mhd_error_t *mhep);
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176 extern int rel_own(mhd_set_t *mhsp, mhd_error_t *mhep);
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177 extern int get_status(mhd_status_args_t *argsp,
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178 mhd_status_res_t *resp);
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179
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180 /* mhd_mem.c */
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181 extern void *Malloc(size_t s);
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182 extern void *Zalloc(size_t s);
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183 extern void *Realloc(void *p, size_t s);
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184 extern void *Calloc(size_t n, size_t s);
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185 extern char *Strdup(const char *p);
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186 extern void Free(void *p);
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187
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188 /* mhd_set.c */
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189 extern void mhd_add_drive_to_set(mhd_drive_set_t *sp,
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190 mhd_drive_t *dp);
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191 extern void mhd_del_drive_from_set(mhd_drive_t *dp);
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192 extern mhd_drive_set_t *mhd_create_set(mhd_set_t *mhsp, mhd_opts_t options,
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193 mhd_drive_list_t *dlp, mhd_error_t *mhep);
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194 extern mhd_drive_t *mhd_find_drive(char *rname);
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195 extern int mhd_list_drives(char *path, mhd_did_flags_t flags,
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196 mhd_list_res_t *resultsp, mhd_error_t *mhep);
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197 extern int mhd_release_drives(mhd_set_t *mhsp, mhd_opts_t options,
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198 mhd_error_t *mhep);
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199 extern int mhd_reserve_drives(mhd_set_t *mhsp,
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200 mhd_mhiargs_t *timeoutp, mhd_ff_mode_t ff_mode,
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201 mhd_opts_t options, mhd_error_t *mhep);
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202 extern int mhd_status_drives(mhd_set_t *mhsp, mhd_opts_t options,
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203 mhd_drive_status_t **status, mhd_error_t *mhep);
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204
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205 /* mhd_synch.c */
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206 extern void mhd_cv_init(cond_t *cvp);
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207 extern void mhd_cv_destroy(cond_t *cvp);
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208 extern void mhd_cv_wait(cond_t *cvp, mutex_t *mp);
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209 extern void mhd_cv_timedwait(cond_t *cvp, mutex_t *mp,
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210 mhd_msec_t to);
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211 extern void mhd_cv_broadcast(cond_t *cvp);
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212 extern void mhd_mx_init(mutex_t *mp);
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213 extern void mhd_mx_destroy(mutex_t *mp);
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214 extern void mhd_mx_lock(mutex_t *mp);
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215 extern void mhd_mx_unlock(mutex_t *mp);
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216 extern void mhd_rw_rdlock(rwlock_t *rwlp);
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217 extern void mhd_rw_wrlock(rwlock_t *rwlp);
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218 extern void mhd_rw_unlock(rwlock_t *rwlp);
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219
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220 /* mhd_time.c */
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221 extern mhd_msec_t mhd_time();
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222
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223 #ifdef __cplusplus
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224 }
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225 #endif
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226
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227 #endif /* _MHD_LOCAL_H */
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