1 /*- 2 * Copyright (c) 1997, 1998, 1999 3 * Nan Yang Computer Services Limited. All rights reserved. 4 * 5 * Written by Greg Lehey 6 * 7 * This software is distributed under the so-called ``Berkeley 8 * License'': 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Nan Yang Computer 21 * Services Limited. 22 * 4. Neither the name of the Company nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * This software is provided ``as is'', and any express or implied 27 * warranties, including, but not limited to, the implied warranties of 28 * merchantability and fitness for a particular purpose are disclaimed. 29 * In no event shall the company or contributors be liable for any 30 * direct, indirect, incidental, special, exemplary, or consequential 31 * damages (including, but not limited to, procurement of substitute 32 * goods or services; loss of use, data, or profits; or business 33 * interruption) however caused and on any theory of liability, whether 34 * in contract, strict liability, or tort (including negligence or 35 * otherwise) arising in any way out of the use of this software, even if 36 * advised of the possibility of such damage. 37 * 38 * $Id: vinumutil.c,v 1.14 1999/12/30 07:04:02 grog Exp grog $ 39 * $FreeBSD: src/sys/dev/vinum/vinumutil.c,v 1.15 2000/02/29 06:16:44 grog Exp $ 40 * $DragonFly: src/sys/dev/raid/vinum/vinumutil.c,v 1.6 2006/12/20 18:14:40 dillon Exp $ 41 */ 42 43 /* This file contains utility routines used both in kernel and user context */ 44 45 #include "vinumhdr.h" 46 #include "statetexts.h" 47 48 #ifdef _KERNEL 49 #define sprintf ksprintf 50 #endif 51 52 static char numeric_state[32]; /* temporary buffer for ASCII conversions */ 53 #define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *)) 54 /* Return drive state as a string */ 55 char * 56 drive_state(enum drivestate state) 57 { 58 if (((unsigned) state) >= STATECOUNT(drive)) { 59 sprintf(numeric_state, "Invalid state %d", (int) state); 60 return numeric_state; 61 } else 62 return drivestatetext[state]; 63 } 64 65 /* Return volume state as a string */ 66 char * 67 volume_state(enum volumestate state) 68 { 69 if (((unsigned) state) >= STATECOUNT(vol)) { 70 sprintf(numeric_state, "Invalid state %d", (int) state); 71 return numeric_state; 72 } else 73 return volstatetext[state]; 74 } 75 76 /* Return plex state as a string */ 77 char * 78 plex_state(enum plexstate state) 79 { 80 if (((unsigned) state) >= STATECOUNT(plex)) { 81 sprintf(numeric_state, "Invalid state %d", (int) state); 82 return numeric_state; 83 } else 84 return plexstatetext[state]; 85 } 86 87 /* Return plex organization as a string */ 88 char * 89 plex_org(enum plexorg org) 90 { 91 switch (org) { 92 case plex_disorg: /* disorganized */ 93 return "disorg"; 94 break; 95 96 case plex_concat: /* concatenated plex */ 97 return "concat"; 98 break; 99 100 case plex_striped: /* striped plex */ 101 return "striped"; 102 break; 103 104 case plex_raid4: /* RAID-4 plex */ 105 return "raid4"; 106 107 case plex_raid5: /* RAID-5 plex */ 108 return "raid5"; 109 break; 110 111 default: 112 sprintf(numeric_state, "Invalid org %d", (int) org); 113 return numeric_state; 114 } 115 } 116 117 /* Return sd state as a string */ 118 char * 119 sd_state(enum sdstate state) 120 { 121 if (((unsigned) state) >= STATECOUNT(sd)) { 122 sprintf(numeric_state, "Invalid state %d", (int) state); 123 return numeric_state; 124 } else 125 return sdstatetext[state]; 126 } 127 128 /* Now convert in the other direction */ 129 /* 130 * These are currently used only internally, 131 * so we don't do too much error checking 132 */ 133 enum drivestate 134 DriveState(char *text) 135 { 136 int i; 137 for (i = 0; i < STATECOUNT(drive); i++) 138 if (strcmp(text, drivestatetext[i]) == 0) /* found it */ 139 return (enum drivestate) i; 140 return -1; 141 } 142 143 enum sdstate 144 SdState(char *text) 145 { 146 int i; 147 for (i = 0; i < STATECOUNT(sd); i++) 148 if (strcmp(text, sdstatetext[i]) == 0) /* found it */ 149 return (enum sdstate) i; 150 return -1; 151 } 152 153 enum plexstate 154 PlexState(char *text) 155 { 156 int i; 157 for (i = 0; i < STATECOUNT(plex); i++) 158 if (strcmp(text, plexstatetext[i]) == 0) /* found it */ 159 return (enum plexstate) i; 160 return -1; 161 } 162 163 enum volumestate 164 VolState(char *text) 165 { 166 int i; 167 for (i = 0; i < STATECOUNT(vol); i++) 168 if (strcmp(text, volstatetext[i]) == 0) /* found it */ 169 return (enum volumestate) i; 170 return -1; 171 } 172 173 /* 174 * Take a number with an optional scale factor and convert 175 * it to a number of bytes. 176 * 177 * The scale factors are: 178 * 179 * s sectors (of 512 bytes) 180 * b blocks (of 512 bytes). This unit is deprecated, 181 * because it's confusing, but maintained to avoid 182 * confusing Veritas users. 183 * k kilobytes (1024 bytes) 184 * m megabytes (of 1024 * 1024 bytes) 185 * g gigabytes (of 1024 * 1024 * 1024 bytes) 186 */ 187 u_int64_t 188 sizespec(char *spec) 189 { 190 u_int64_t size; 191 char *s; 192 int sign = 1; /* -1 if negative */ 193 194 size = 0; 195 if (spec != NULL) { /* we have a parameter */ 196 s = spec; 197 if (*s == '-') { /* negative, */ 198 sign = -1; 199 s++; /* skip */ 200 } 201 if ((*s >= '0') && (*s <= '9')) { /* it's numeric */ 202 while ((*s >= '0') && (*s <= '9')) /* it's numeric */ 203 size = size * 10 + *s++ - '0'; /* convert it */ 204 switch (*s) { 205 case '\0': 206 return size * sign; 207 208 case 'B': 209 case 'b': 210 case 'S': 211 case 's': 212 return size * sign * 512; 213 214 case 'K': 215 case 'k': 216 return size * sign * 1024; 217 218 case 'M': 219 case 'm': 220 return size * sign * 1024 * 1024; 221 222 case 'G': 223 case 'g': 224 return size * sign * 1024 * 1024 * 1024; 225 } 226 } 227 throw_rude_remark(EINVAL, "Invalid length specification: %s", spec); 228 } 229 throw_rude_remark(EINVAL, "Missing length specification"); 230 /* NOTREACHED */ 231 return -1; 232 } 233 234 /* 235 * Extract the volume number from a device number. 236 * Perform no checking. 237 */ 238 int 239 Volno(cdev_t dev) 240 { 241 return (minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT; 242 } 243 244 /* 245 * Extract a plex number from a device number. 246 * Don't check the major number, but check the 247 * type. Return -1 for invalid types. 248 */ 249 int 250 Plexno(cdev_t dev) 251 { 252 switch (DEVTYPE(dev)) { 253 case VINUM_VOLUME_TYPE: 254 case VINUM_DRIVE_TYPE: 255 case VINUM_SUPERDEV_TYPE: /* ordinary super device */ 256 case VINUM_RAWSD_TYPE: 257 return -1; 258 259 case VINUM_PLEX_TYPE: 260 case VINUM_SD_TYPE: 261 return VOL[Volno(dev)].plex[(minor(dev) >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))]; 262 263 case VINUM_RAWPLEX_TYPE: 264 return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */ 265 |((minor(dev) >> VINUM_RAWPLEX_SHIFT) 266 & (MASK(VINUM_RAWPLEX_WIDTH) 267 << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */ 268 } 269 return 0; /* compiler paranoia */ 270 } 271 272 /* 273 * Extract a subdisk number from a device number. 274 * Don't check the major number, but check the 275 * type. Return -1 for invalid types. 276 */ 277 int 278 Sdno(cdev_t dev) 279 { 280 switch (DEVTYPE(dev)) { 281 case VINUM_VOLUME_TYPE: 282 case VINUM_DRIVE_TYPE: 283 case VINUM_SUPERDEV_TYPE: /* ordinary super device */ 284 case VINUM_PLEX_TYPE: 285 case VINUM_RAWPLEX_TYPE: 286 return -1; 287 288 case VINUM_SD_TYPE: 289 return PLEX[Plexno(dev)].sdnos[(minor(dev) >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))]; 290 291 case VINUM_RAWSD_TYPE: 292 return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */ 293 |((minor(dev) >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH) 294 << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */ 295 } 296 return -1; /* compiler paranoia */ 297 } 298