bf7cea1cc0
Rewrite minor number decoding. Now we have only three types of object: subdisks, plexes and volumes. The encoding for plexes and subdisks no longer reflects the object to which they belong. The super devices are high-order volume numbers. This gives vastly more potential volumes (4 million instead of 256).
304 lines
7.7 KiB
C
304 lines
7.7 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* Written by Greg Lehey
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*
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* This software is distributed under the so-called ``Berkeley
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* License'':
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $Id: vinumutil.c,v 1.17 2003/04/28 02:54:43 grog Exp $
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* $FreeBSD$
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*/
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/* This file contains utility routines used both in kernel and user context */
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#include <dev/vinum/vinumhdr.h>
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#include <dev/vinum/statetexts.h>
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#ifndef _KERNEL
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#include <stdio.h>
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extern jmp_buf command_fail; /* return on a failed command */
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#endif
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static char numeric_state[32]; /* temporary buffer for ASCII conversions */
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#define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *))
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/* Return drive state as a string */
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char *
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drive_state(enum drivestate state)
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{
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if (((unsigned) state) >= STATECOUNT(drive)) {
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sprintf(numeric_state, "Invalid state %d", (int) state);
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return numeric_state;
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} else
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return drivestatetext[state];
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}
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/* Return volume state as a string */
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char *
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volume_state(enum volumestate state)
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{
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if (((unsigned) state) >= STATECOUNT(vol)) {
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sprintf(numeric_state, "Invalid state %d", (int) state);
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return numeric_state;
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} else
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return volstatetext[state];
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}
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/* Return plex state as a string */
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char *
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plex_state(enum plexstate state)
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{
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if (((unsigned) state) >= STATECOUNT(plex)) {
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sprintf(numeric_state, "Invalid state %d", (int) state);
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return numeric_state;
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} else
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return plexstatetext[state];
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}
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/* Return plex organization as a string */
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char *
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plex_org(enum plexorg org)
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{
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switch (org) {
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case plex_disorg: /* disorganized */
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return "disorg";
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break;
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case plex_concat: /* concatenated plex */
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return "concat";
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break;
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case plex_striped: /* striped plex */
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return "striped";
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break;
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case plex_raid4: /* RAID-4 plex */
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return "raid4";
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case plex_raid5: /* RAID-5 plex */
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return "raid5";
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break;
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default:
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sprintf(numeric_state, "Invalid org %d", (int) org);
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return numeric_state;
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}
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}
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/* Return sd state as a string */
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char *
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sd_state(enum sdstate state)
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{
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if (((unsigned) state) >= STATECOUNT(sd)) {
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sprintf(numeric_state, "Invalid state %d", (int) state);
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return numeric_state;
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} else
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return sdstatetext[state];
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}
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/* Now convert in the other direction */
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/*
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* These are currently used only internally,
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* so we don't do too much error checking
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*/
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enum drivestate
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DriveState(char *text)
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{
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int i;
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for (i = 0; i < STATECOUNT(drive); i++)
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if (strcmp(text, drivestatetext[i]) == 0) /* found it */
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return (enum drivestate) i;
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return -1;
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}
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enum sdstate
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SdState(char *text)
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{
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int i;
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for (i = 0; i < STATECOUNT(sd); i++)
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if (strcmp(text, sdstatetext[i]) == 0) /* found it */
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return (enum sdstate) i;
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return -1;
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}
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enum plexstate
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PlexState(char *text)
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{
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int i;
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for (i = 0; i < STATECOUNT(plex); i++)
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if (strcmp(text, plexstatetext[i]) == 0) /* found it */
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return (enum plexstate) i;
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return -1;
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}
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enum volumestate
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VolState(char *text)
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{
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int i;
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for (i = 0; i < STATECOUNT(vol); i++)
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if (strcmp(text, volstatetext[i]) == 0) /* found it */
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return (enum volumestate) i;
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return -1;
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}
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/*
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* Take a number with an optional scale factor and convert
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* it to a number of bytes.
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*
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* The scale factors are:
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*
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* s sectors (of 512 bytes)
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* b blocks (of 512 bytes). This unit is deprecated,
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* because it's confusing, but maintained to avoid
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* confusing Veritas users.
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* k kilobytes (1024 bytes)
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* m megabytes (of 1024 * 1024 bytes)
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* g gigabytes (of 1024 * 1024 * 1024 bytes)
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*/
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u_int64_t
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sizespec(char *spec)
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{
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u_int64_t size;
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char *s;
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int sign = 1; /* -1 if negative */
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size = 0;
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if (spec != NULL) { /* we have a parameter */
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s = spec;
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if (*s == '-') { /* negative, */
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sign = -1;
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s++; /* skip */
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}
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if ((*s >= '0') && (*s <= '9')) { /* it's numeric */
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while ((*s >= '0') && (*s <= '9')) /* it's numeric */
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size = size * 10 + *s++ - '0'; /* convert it */
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switch (*s) {
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case '\0':
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return size * sign;
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case 'B':
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case 'b':
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case 'S':
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case 's':
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return size * sign * 512;
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case 'K':
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case 'k':
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return size * sign * 1024;
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case 'M':
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case 'm':
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return size * sign * 1024 * 1024;
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case 'G':
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case 'g':
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return size * sign * 1024 * 1024 * 1024;
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}
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}
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#ifdef _KERNEL
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throw_rude_remark(EINVAL, "Invalid length specification: %s", spec);
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#else
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fprintf(stderr, "Invalid length specification: %s", spec);
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longjmp(command_fail, 1);
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#endif
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}
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#ifdef _KERNEL
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throw_rude_remark(EINVAL, "Missing length specification");
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#else
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fprintf(stderr, "Missing length specification");
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longjmp(command_fail, 1);
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#endif
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/* NOTREACHED */
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return -1;
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}
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/*
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* Extract the volume number from a device number. Check that it's
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* the correct type, and that it isn't one of the superdevs.
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*/
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int
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Volno(dev_t dev)
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{
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int volno = minor(dev);
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if (OBJTYPE(dev) != VINUM_VOLUME_TYPE)
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return -1;
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else
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volno = ((volno & 0x3fff0000) >> 8) | (volno & 0xff);
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if ((volno == VINUM_SUPERDEV_VOL)
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|| (volno == VINUM_DAEMON_VOL))
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return -1;
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else
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return volno;
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}
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/*
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* Extract a plex number from a device number.
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* Don't check the major number, but check the
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* type. Return -1 for invalid types.
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*/
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int
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Plexno(dev_t dev)
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{
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int plexno = minor(dev);
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if (OBJTYPE(dev) != VINUM_PLEX_TYPE)
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return -1;
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else
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return ((plexno & 0x3fff0000) >> 8) | (plexno & 0xff);
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}
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/*
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* Extract a subdisk number from a device number.
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* Don't check the major number, but check the
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* type. Return -1 for invalid types.
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*/
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int
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Sdno(dev_t dev)
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{
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int sdno = minor(dev);
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/*
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* Care: VINUM_SD_TYPE is 2 or 3, which is why we use < instead of
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* !=. It's not clear that this makes any sense abstracting it to
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* this level.
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*/
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if (OBJTYPE(dev) < VINUM_SD_TYPE)
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return -1;
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else
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/*
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* Note that the number we return includes the low-order bit of the
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* type field. This gives us twice as many potential subdisks as
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* plexes or volumes.
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*/
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return ((sdno & 0x7fff0000) >> 8) | (sdno & 0xff);
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}
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