2 * Copyright (c) 1997, 1998, 1999
3 * Nan Yang Computer Services Limited. All rights reserved.
5 * Written by Greg Lehey
7 * This software is distributed under the so-called ``Berkeley
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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
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.
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.
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 1.4 2005/01/25 22:58:42 joerg Exp $
43 /* This file contains utility routines used both in kernel and user context */
46 #include "statetexts.h"
48 static char numeric_state[32]; /* temporary buffer for ASCII conversions */
49 #define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *))
50 /* Return drive state as a string */
52 drive_state(enum drivestate state)
54 if (((unsigned) state) >= STATECOUNT(drive)) {
55 sprintf(numeric_state, "Invalid state %d", (int) state);
58 return drivestatetext[state];
61 /* Return volume state as a string */
63 volume_state(enum volumestate state)
65 if (((unsigned) state) >= STATECOUNT(vol)) {
66 sprintf(numeric_state, "Invalid state %d", (int) state);
69 return volstatetext[state];
72 /* Return plex state as a string */
74 plex_state(enum plexstate state)
76 if (((unsigned) state) >= STATECOUNT(plex)) {
77 sprintf(numeric_state, "Invalid state %d", (int) state);
80 return plexstatetext[state];
83 /* Return plex organization as a string */
85 plex_org(enum plexorg org)
88 case plex_disorg: /* disorganized */
92 case plex_concat: /* concatenated plex */
96 case plex_striped: /* striped plex */
100 case plex_raid4: /* RAID-4 plex */
103 case plex_raid5: /* RAID-5 plex */
108 sprintf(numeric_state, "Invalid org %d", (int) org);
109 return numeric_state;
113 /* Return sd state as a string */
115 sd_state(enum sdstate state)
117 if (((unsigned) state) >= STATECOUNT(sd)) {
118 sprintf(numeric_state, "Invalid state %d", (int) state);
119 return numeric_state;
121 return sdstatetext[state];
124 /* Now convert in the other direction */
126 * These are currently used only internally,
127 * so we don't do too much error checking
130 DriveState(char *text)
133 for (i = 0; i < STATECOUNT(drive); i++)
134 if (strcmp(text, drivestatetext[i]) == 0) /* found it */
135 return (enum drivestate) i;
143 for (i = 0; i < STATECOUNT(sd); i++)
144 if (strcmp(text, sdstatetext[i]) == 0) /* found it */
145 return (enum sdstate) i;
150 PlexState(char *text)
153 for (i = 0; i < STATECOUNT(plex); i++)
154 if (strcmp(text, plexstatetext[i]) == 0) /* found it */
155 return (enum plexstate) i;
163 for (i = 0; i < STATECOUNT(vol); i++)
164 if (strcmp(text, volstatetext[i]) == 0) /* found it */
165 return (enum volumestate) i;
170 * Take a number with an optional scale factor and convert
171 * it to a number of bytes.
173 * The scale factors are:
175 * s sectors (of 512 bytes)
176 * b blocks (of 512 bytes). This unit is deprecated,
177 * because it's confusing, but maintained to avoid
178 * confusing Veritas users.
179 * k kilobytes (1024 bytes)
180 * m megabytes (of 1024 * 1024 bytes)
181 * g gigabytes (of 1024 * 1024 * 1024 bytes)
188 int sign = 1; /* -1 if negative */
191 if (spec != NULL) { /* we have a parameter */
193 if (*s == '-') { /* negative, */
197 if ((*s >= '0') && (*s <= '9')) { /* it's numeric */
198 while ((*s >= '0') && (*s <= '9')) /* it's numeric */
199 size = size * 10 + *s++ - '0'; /* convert it */
208 return size * sign * 512;
212 return size * sign * 1024;
216 return size * sign * 1024 * 1024;
220 return size * sign * 1024 * 1024 * 1024;
223 throw_rude_remark(EINVAL, "Invalid length specification: %s", spec);
225 throw_rude_remark(EINVAL, "Missing length specification");
231 * Extract the volume number from a device number.
232 * Perform no checking.
237 return (minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT;
241 * Extract a plex number from a device number.
242 * Don't check the major number, but check the
243 * type. Return -1 for invalid types.
248 switch (DEVTYPE(dev)) {
249 case VINUM_VOLUME_TYPE:
250 case VINUM_DRIVE_TYPE:
251 case VINUM_SUPERDEV_TYPE: /* ordinary super device */
252 case VINUM_RAWSD_TYPE:
255 case VINUM_PLEX_TYPE:
257 return VOL[Volno(dev)].plex[(minor(dev) >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))];
259 case VINUM_RAWPLEX_TYPE:
260 return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
261 |((minor(dev) >> VINUM_RAWPLEX_SHIFT)
262 & (MASK(VINUM_RAWPLEX_WIDTH)
263 << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */
265 return 0; /* compiler paranoia */
269 * Extract a subdisk number from a device number.
270 * Don't check the major number, but check the
271 * type. Return -1 for invalid types.
276 switch (DEVTYPE(dev)) {
277 case VINUM_VOLUME_TYPE:
278 case VINUM_DRIVE_TYPE:
279 case VINUM_SUPERDEV_TYPE: /* ordinary super device */
280 case VINUM_PLEX_TYPE:
281 case VINUM_RAWPLEX_TYPE:
285 return PLEX[Plexno(dev)].sdnos[(minor(dev) >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))];
287 case VINUM_RAWSD_TYPE:
288 return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
289 |((minor(dev) >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH)
290 << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */
292 return -1; /* compiler paranoia */