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 *
drive_state(enum drivestate state)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 *
volume_state(enum volumestate state)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 *
plex_state(enum plexstate state)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 *
plex_org(enum plexorg org)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 *
sd_state(enum sdstate state)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
DriveState(char * text)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
SdState(char * text)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
PlexState(char * text)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
VolState(char * text)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
sizespec(char * spec)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
Volno(cdev_t dev)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
Plexno(cdev_t dev)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
Sdno(cdev_t dev)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