FreeBSD/Linux Kernel Cross Reference
sys/dev/raid/vinum/vinumutil.c

     /*-
      * Copyright (c) 1997, 1998, 1999
      *      Nan Yang Computer Services Limited.  All rights reserved.
      *
      *  Written by Greg Lehey
      *
      *  This software is distributed under the so-called ``Berkeley
      *  License'':
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Nan Yang Computer
     *      Services Limited.
     * 4. Neither the name of the Company nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * This software is provided ``as is'', and any express or implied
     * warranties, including, but not limited to, the implied warranties of
     * merchantability and fitness for a particular purpose are disclaimed.
     * In no event shall the company or contributors be liable for any
     * direct, indirect, incidental, special, exemplary, or consequential
     * damages (including, but not limited to, procurement of substitute
     * goods or services; loss of use, data, or profits; or business
     * interruption) however caused and on any theory of liability, whether
     * in contract, strict liability, or tort (including negligence or
     * otherwise) arising in any way out of the use of this software, even if
     * advised of the possibility of such damage.
     *
     * $Id: vinumutil.c,v 1.14 1999/12/30 07:04:02 grog Exp grog $
     * $FreeBSD: src/sys/dev/vinum/vinumutil.c,v 1.15 2000/02/29 06:16:44 grog Exp $
     * $DragonFly: src/sys/dev/raid/vinum/vinumutil.c,v 1.6 2006/12/20 18:14:40 dillon Exp $
     */
    
    /* This file contains utility routines used both in kernel and user context */
    
    #include "vinumhdr.h"
    #include "statetexts.h"
    
    #ifdef _KERNEL
    #define sprintf ksprintf
    #endif
    
    static char numeric_state[32];                              /* temporary buffer for ASCII conversions */
    #define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *))
    /* Return drive state as a string */
    char *
    drive_state(enum drivestate state)
    {
        if (((unsigned) state) >= STATECOUNT(drive)) {
            sprintf(numeric_state, "Invalid state %d", (int) state);
            return numeric_state;
        } else
            return drivestatetext[state];
    }
    
    /* Return volume state as a string */
    char *
    volume_state(enum volumestate state)
    {
        if (((unsigned) state) >= STATECOUNT(vol)) {
            sprintf(numeric_state, "Invalid state %d", (int) state);
            return numeric_state;
        } else
            return volstatetext[state];
    }
    
    /* Return plex state as a string */
    char *
    plex_state(enum plexstate state)
    {
        if (((unsigned) state) >= STATECOUNT(plex)) {
            sprintf(numeric_state, "Invalid state %d", (int) state);
            return numeric_state;
        } else
            return plexstatetext[state];
    }
    
    /* Return plex organization as a string */
    char *
    plex_org(enum plexorg org)
    {
        switch (org) {
        case plex_disorg:                                       /* disorganized */
            return "disorg";
            break;
    
        case plex_concat:                                       /* concatenated plex */
            return "concat";
            break;
    
       case plex_striped:                                      /* striped plex */
           return "striped";
           break;
   
       case plex_raid4:                                        /* RAID-4 plex */
           return "raid4";
   
       case plex_raid5:                                        /* RAID-5 plex */
           return "raid5";
           break;
   
       default:
           sprintf(numeric_state, "Invalid org %d", (int) org);
           return numeric_state;
       }
   }
   
   /* Return sd state as a string */
   char *
   sd_state(enum sdstate state)
   {
       if (((unsigned) state) >= STATECOUNT(sd)) {
           sprintf(numeric_state, "Invalid state %d", (int) state);
           return numeric_state;
       } else
           return sdstatetext[state];
   }
   
   /* Now convert in the other direction */
   /*
    * These are currently used only internally,
    * so we don't do too much error checking
    */
   enum drivestate
   DriveState(char *text)
   {
       int i;
       for (i = 0; i < STATECOUNT(drive); i++)
           if (strcmp(text, drivestatetext[i]) == 0)           /* found it */
               return (enum drivestate) i;
       return -1;
   }
   
   enum sdstate
   SdState(char *text)
   {
       int i;
       for (i = 0; i < STATECOUNT(sd); i++)
           if (strcmp(text, sdstatetext[i]) == 0)              /* found it */
               return (enum sdstate) i;
       return -1;
   }
   
   enum plexstate
   PlexState(char *text)
   {
       int i;
       for (i = 0; i < STATECOUNT(plex); i++)
           if (strcmp(text, plexstatetext[i]) == 0)            /* found it */
               return (enum plexstate) i;
       return -1;
   }
   
   enum volumestate
   VolState(char *text)
   {
       int i;
       for (i = 0; i < STATECOUNT(vol); i++)
           if (strcmp(text, volstatetext[i]) == 0)             /* found it */
               return (enum volumestate) i;
       return -1;
   }
   
   /*
    * Take a number with an optional scale factor and convert
    * it to a number of bytes.
    *
    * The scale factors are:
    *
    * s    sectors (of 512 bytes)
    * b    blocks (of 512 bytes).  This unit is deprecated,
    *      because it's confusing, but maintained to avoid
    *      confusing Veritas users.
    * k    kilobytes (1024 bytes)
    * m    megabytes (of 1024 * 1024 bytes)
    * g    gigabytes (of 1024 * 1024 * 1024 bytes)
    */
   u_int64_t
   sizespec(char *spec)
   {
       u_int64_t size;
       char *s;
       int sign = 1;                                           /* -1 if negative */
   
       size = 0;
       if (spec != NULL) {                                     /* we have a parameter */
           s = spec;
           if (*s == '-') {                                    /* negative, */
               sign = -1;
               s++;                                            /* skip */
           }
           if ((*s >= '') && (*s <= '9')) {                   /* it's numeric */
               while ((*s >= '') && (*s <= '9'))              /* it's numeric */
                   size = size * 10 + *s++ - '';              /* convert it */
               switch (*s) {
               case '\0':
                   return size * sign;
   
               case 'B':
               case 'b':
               case 'S':
               case 's':
                   return size * sign * 512;
   
               case 'K':
               case 'k':
                   return size * sign * 1024;
   
               case 'M':
               case 'm':
                   return size * sign * 1024 * 1024;
   
               case 'G':
               case 'g':
                   return size * sign * 1024 * 1024 * 1024;
               }
           }
           throw_rude_remark(EINVAL, "Invalid length specification: %s", spec);
       }
       throw_rude_remark(EINVAL, "Missing length specification");
       /* NOTREACHED */
       return -1;
   }
   
   /*
    * Extract the volume number from a device number.
    * Perform no checking.
    */
   int
   Volno(cdev_t dev)
   {
       return (minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT;
   }
   
   /*
    * Extract a plex number from a device number.
    * Don't check the major number, but check the
    * type.  Return -1 for invalid types.
    */
   int
   Plexno(cdev_t dev)
   {
       switch (DEVTYPE(dev)) {
       case VINUM_VOLUME_TYPE:
       case VINUM_DRIVE_TYPE:
       case VINUM_SUPERDEV_TYPE:                               /* ordinary super device */
       case VINUM_RAWSD_TYPE:
           return -1;
   
       case VINUM_PLEX_TYPE:
       case VINUM_SD_TYPE:
           return VOL[Volno(dev)].plex[(minor(dev) >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))];
   
       case VINUM_RAWPLEX_TYPE:
           return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
           |((minor(dev) >> VINUM_RAWPLEX_SHIFT)
               & (MASK(VINUM_RAWPLEX_WIDTH)
                   << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH)));   /* upper 12 bits */
       }
       return 0;                                               /* compiler paranoia */
   }
   
   /*
    * Extract a subdisk number from a device number.
    * Don't check the major number, but check the
    * type.  Return -1 for invalid types.
    */
   int
   Sdno(cdev_t dev)
   {
       switch (DEVTYPE(dev)) {
       case VINUM_VOLUME_TYPE:
       case VINUM_DRIVE_TYPE:
       case VINUM_SUPERDEV_TYPE:                               /* ordinary super device */
       case VINUM_PLEX_TYPE:
       case VINUM_RAWPLEX_TYPE:
           return -1;
   
       case VINUM_SD_TYPE:
           return PLEX[Plexno(dev)].sdnos[(minor(dev) >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))];
   
       case VINUM_RAWSD_TYPE:
           return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
           |((minor(dev) >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH)
                   << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH)));   /* upper 12 bits */
       }
       return -1;                                              /* compiler paranoia */
   }

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