Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sys / dev / raid / vinum / vinumutil.c
CommitLineData
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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 $
b13267a5 40 * $DragonFly: src/sys/dev/raid/vinum/vinumutil.c,v 1.5 2006/09/10 01:26:36 dillon Exp $
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41 */
42
43/* This file contains utility routines used both in kernel and user context */
44
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45#include "vinumhdr.h"
46#include "statetexts.h"
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47
48static 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 */
51char *
52drive_state(enum drivestate state)
53{
54 if (((unsigned) state) >= STATECOUNT(drive)) {
55 sprintf(numeric_state, "Invalid state %d", (int) state);
56 return numeric_state;
57 } else
58 return drivestatetext[state];
59}
60
61/* Return volume state as a string */
62char *
63volume_state(enum volumestate state)
64{
65 if (((unsigned) state) >= STATECOUNT(vol)) {
66 sprintf(numeric_state, "Invalid state %d", (int) state);
67 return numeric_state;
68 } else
69 return volstatetext[state];
70}
71
72/* Return plex state as a string */
73char *
74plex_state(enum plexstate state)
75{
76 if (((unsigned) state) >= STATECOUNT(plex)) {
77 sprintf(numeric_state, "Invalid state %d", (int) state);
78 return numeric_state;
79 } else
80 return plexstatetext[state];
81}
82
83/* Return plex organization as a string */
84char *
85plex_org(enum plexorg org)
86{
87 switch (org) {
88 case plex_disorg: /* disorganized */
89 return "disorg";
90 break;
91
92 case plex_concat: /* concatenated plex */
93 return "concat";
94 break;
95
96 case plex_striped: /* striped plex */
97 return "striped";
98 break;
99
100 case plex_raid4: /* RAID-4 plex */
101 return "raid4";
102
103 case plex_raid5: /* RAID-5 plex */
104 return "raid5";
105 break;
106
107 default:
108 sprintf(numeric_state, "Invalid org %d", (int) org);
109 return numeric_state;
110 }
111}
112
113/* Return sd state as a string */
114char *
115sd_state(enum sdstate state)
116{
117 if (((unsigned) state) >= STATECOUNT(sd)) {
118 sprintf(numeric_state, "Invalid state %d", (int) state);
119 return numeric_state;
120 } else
121 return sdstatetext[state];
122}
123
124/* Now convert in the other direction */
125/*
126 * These are currently used only internally,
127 * so we don't do too much error checking
128 */
129enum drivestate
130DriveState(char *text)
131{
132 int i;
133 for (i = 0; i < STATECOUNT(drive); i++)
134 if (strcmp(text, drivestatetext[i]) == 0) /* found it */
135 return (enum drivestate) i;
136 return -1;
137}
138
139enum sdstate
140SdState(char *text)
141{
142 int i;
143 for (i = 0; i < STATECOUNT(sd); i++)
144 if (strcmp(text, sdstatetext[i]) == 0) /* found it */
145 return (enum sdstate) i;
146 return -1;
147}
148
149enum plexstate
150PlexState(char *text)
151{
152 int i;
153 for (i = 0; i < STATECOUNT(plex); i++)
154 if (strcmp(text, plexstatetext[i]) == 0) /* found it */
155 return (enum plexstate) i;
156 return -1;
157}
158
159enum volumestate
160VolState(char *text)
161{
162 int i;
163 for (i = 0; i < STATECOUNT(vol); i++)
164 if (strcmp(text, volstatetext[i]) == 0) /* found it */
165 return (enum volumestate) i;
166 return -1;
167}
168
169/*
170 * Take a number with an optional scale factor and convert
171 * it to a number of bytes.
172 *
173 * The scale factors are:
174 *
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)
182 */
183u_int64_t
184sizespec(char *spec)
185{
186 u_int64_t size;
187 char *s;
188 int sign = 1; /* -1 if negative */
189
190 size = 0;
191 if (spec != NULL) { /* we have a parameter */
192 s = spec;
193 if (*s == '-') { /* negative, */
194 sign = -1;
195 s++; /* skip */
196 }
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 */
200 switch (*s) {
201 case '\0':
202 return size * sign;
203
204 case 'B':
205 case 'b':
206 case 'S':
207 case 's':
208 return size * sign * 512;
209
210 case 'K':
211 case 'k':
212 return size * sign * 1024;
213
214 case 'M':
215 case 'm':
216 return size * sign * 1024 * 1024;
217
218 case 'G':
219 case 'g':
220 return size * sign * 1024 * 1024 * 1024;
221 }
222 }
984263bc 223 throw_rude_remark(EINVAL, "Invalid length specification: %s", spec);
984263bc 224 }
984263bc 225 throw_rude_remark(EINVAL, "Missing length specification");
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226 /* NOTREACHED */
227 return -1;
228}
229
230/*
231 * Extract the volume number from a device number.
232 * Perform no checking.
233 */
234int
b13267a5 235Volno(cdev_t dev)
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236{
237 return (minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT;
238}
239
240/*
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.
244 */
245int
b13267a5 246Plexno(cdev_t dev)
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247{
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:
253 return -1;
254
255 case VINUM_PLEX_TYPE:
256 case VINUM_SD_TYPE:
257 return VOL[Volno(dev)].plex[(minor(dev) >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))];
258
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 */
264 }
265 return 0; /* compiler paranoia */
266}
267
268/*
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.
272 */
273int
b13267a5 274Sdno(cdev_t dev)
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275{
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:
282 return -1;
283
284 case VINUM_SD_TYPE:
285 return PLEX[Plexno(dev)].sdnos[(minor(dev) >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))];
286
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 */
291 }
292 return -1; /* compiler paranoia */
293}